Saturday, January 22, 2022

Valve Body

It's used to pipeline

Material:brass H62

Material specification:∅25×64

Surface treatment:chrome plated

 

Properties of brass H62

H62 brass represents ordinary brass with an average copper content of 62%,ordinary brass is based on the addition of other elements of copper alloy be called special brass and it is still represented by "H",followed by the chemical symbol and average composition f other added elements.Such as H62 that the copper content is 60.5%~63.5%,remaining content is zinc.HA59-3-2 indicates that its copper content is 57%~60%,aluminum content about 2.5%~3.5%,nickel content is 2%~3%,and the remaining content is zinc.There are three kinds of brass that are divided into ordinary brass,special brass and cast brass.Cast brass begins with ZCu followed by the symbol of other elements and their average content.

 

Ordinary brass has good mechanical properties,it has good plasticity in the cold state,better plasticity in the hot state.Has good machinability,easy brazing and welding,corrosion resistance,but it is easy to produce crack.In addition,the price is cheap and widely used in a common brass variety.H62 brass is much harder at room temperature in β phase than in a phase,so it can be used for parts that bear large loads."a+"two-phase brass can be hot machining above 600℃.Microstructure of a+β two-phase brass:a is a bright white solid solution and β is a CuZn-based ordered solid solution.

 

It can make all kinds of tensile and bending manufacturing stress parts,such as pins,rivets,washers,nuts,ducts,barometer springs,screen mesh,radiator parts,etc.

 

Mechanical property

Strength of extension(Rm N/mm2):385.0

Extend rate(A%):15.0

Chemical component Cu:60.5-63.5 Ni:0.5 Fe:0.15 Pb:0.08 Zn:remaining

Impurity:0.5

Mechanical property:(σb/MPa)410-630

Elongation(δ10/%)≥10

Vickers hardness:(HV)105-175

Thickness≥0.3)Note:thickness 0.3-10

 

Processing technic

The quantities of tools:9 tools

Tool Type

35°round turning tool

2MM cut-off tool

∅7.1 drill bit

∅8 boring tool

∅8 inside threading tool

∅5.5 drill bit

1/4-32 screw tap

∅8 milling cutter

∅1.5 drill bit

∅1.5 milling cutter

According to the drawing to analysis that the copper valve parts haven't special precision requirements in the shape and position tolerance.Therefore,we choose the direction of 5/8 thread of the parts as the priority for machining,because there is a requirements of R0.5 Angle in this direction.In order to fillet R0.5 Angle and the cylindrical inclined plane and end face processed surface connection relationship is more perfect.

 

Use 35°round turning tool machining parts shape,then use ∅7.1 drill bit, ∅8 boring tool to machining ∅7.1 and 5/8 x18 thread bottom hole.

Use ∅8 inside threading tool to machining 5/x18 thread,then use ∅1.5 drill bit,∅1.5 milling cutter to machining hole of ∅1.5×3.5 size,then use ∅5.5 drill bit,1/4-32 tap screw and ∅8 milling cutter to machining ∅9.5 and 1/4-32 thread,then cut off the parts use 2mm cut off tool.

 

It is necessary to custom clamp before processing at both end,male thread 5/8×18 length is 11mm.As following picture shows:

     The reason is that the surface is inclined plane of this parts and there is no clamping condition.So it only can assembly with 5/8×18 internal thread which has been machined with the 5/8×18 external thread of the fixture.Then processing of the remaining part,which not only ensure the repeated positioning error of the parts but also improved the processing efficiency.

 

    Use 35°round turning tool to machining total length 59mm,then use ∅7.1 drill bit and ∅8 boring tool to machining 1/2×20 thread.Finally make surface treatment of chrome plated.

    

      Please refer to finished parts as below:

Recommended Products:Customized Stainless Steel CNC turning parts

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Extended hob life benefited from micro lubrication machining

Micro-lubrication quasi-dry machining is a new type of machining method that replaces traditional cutting fluid with micro-lubrication and has been applied in some enterprises. Under quasi-dry cutting conditions, the cutting process, machine tool design, micro-lubrication device, lubricant, operation and cutting tools are different from traditional wet cutting. The theoretical basis of quasi-dry cutting is far less mature than traditional cutting fluid metal cutting theory. The processing technology of dry cutting needs to be explored and accumulated based on the workpiece material, the selection of tools and the coating, so that the technical characteristics of quasi-dry processing can be brought into play.
The working principle of Doppelio’s built-in micro-lubrication device is to generate micron-level suspended oil particles through a precision built-in oil mist generator powered by air. Spindle) is transported to the cutting area between the tool and the workpiece almost without loss, or sprayed to the cutting area through pipelines and external nozzles to participate in cutting lubrication.
In gear machining, three nozzles are usually required to spray micron oil mist particles into the cutting area. One nozzle keeps a certain distance and sprays the rake face of the hob. The other two nozzles are arranged on the left and right of the hob blade, the hob blade and the workpiece. The oil film between the contact points improves the friction between the hob blade and the workpiece material, inhibits temperature rise, and at the same time improves the quality of the machined surface, and has the effect of preventing the machined surface from rusting, and the life of the hob is prolonged.
In addition to the damage caused by impurities in the workpiece material, the life of the hob is mainly the damage to the hob and the coating caused by the repeated heating and cooling of the hob during cutting fluid processing. Hot brittleness”. During micro-lubrication quasi-dry machining, ultra-fine oil mist particles are conducive to penetrating into the cutting area to form an oil film (pressureless cutting fluid may not effectively penetrate into the cutting area), reducing “hob-workpiece” and “hob-cutting” The friction between them plays the role of restraining temperature rise, reducing hob wear, preventing adhesion and improving the quality of workpiece surface and hob life.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Discussion on the role of intelligent preset sequence of car body frame mould

In China, most of the molding process and mold design of automobile panels still mainly rely on the experience of designers, relying on some qualitative theoretical analysis and empirical data. Not only is the design time long and cannot keep up with the pace of the international market, but also because the influence of various parameters on stamping is difficult to determine, it must be repeatedly modified in the trial phase after the design, which consumes a lot of material and financial resources, and even many large molds still need to be imported . Group companies like FAW also rely on imported advanced CAD/CAM systems and equipment to produce high-quality and high-precision panel molds. The domestic specialized panel mold CAD/CAM system is basically being researched and tried in colleges and universities, and no forming system has appeared yet. Universities such as Huazhong University of Science and Technology, Jilin University of Technology, and Shanghai Jiaotong University that have made certain achievements in this regard are still in their infancy.

Looking at the development history of the world’s automobile industry, it can be seen that automobiles have gradually developed and improved along / chassis 0y/engine 0y/body 0. From the perspective of automobile production practices at home and abroad, chassis and engine production technologies are becoming more and more mature. The development of vehicle production capacity depends on the body production capacity, and the upgrading of automobiles also depends on the body to a large extent. When the basic models reach saturation, only by relying on body modification or modification can the market be opened up. Modern automobile body styling technology is gradually becoming mature. The body styling fully considers the requirements of aerodynamics and aesthetics, giving the car a strong sense of the times, and its surface is required to be smooth and beautiful.

Automobile covering parts refer to the surface parts and internal parts of the thin steel plate profiled bodies that cover the engine, the chassis, the cab and the car body, including the outer cover, the inner cover and the support part. Compared with general stamping parts, covering parts have thin materials, complex shapes, mostly spatial curved surfaces, and high structural dimensions and surface quality. Moreover, for the beauty and rigidity of the car body, it is necessary to design ridges, ribs, convex hulls and other shapes on the cover, which further enhances the complexity of the profile. At the same time, the cover part is a nonlinear, elastoplastic, and large deformation process during the stamping process. Only with the aid of CAD/CAM technology can we understand the material deformation and flow of the blank during the stamping process, and can prevent ripples, wrinkles, and wrinkles on the cover surface. Process defects such as dents, and serious process problems such as tearing and springback. In fact, CAD/CAM technology has become an important guarantee for the production of beautiful, cheap, and high-quality cars in developed countries. In the entire cycle of model design, mold design and debugging, and manufacturing, mold design and manufacturing account for about 2/3 of the time. Therefore, the application of CAD/CAE/CAM technology for cover molds has played a key role in shortening the development cycle.

Cover mold CAD/CAM integration program At present, many large-scale foreign CAD/CAM systems have been introduced in China. Aiming at the development of the domestic automobile industry, we have made extensive investigations and studies, and made a general plan for the CAD/CAM integration scheme of automobile panel molds. The topological relationship is shown in the figure. The system mainly relies on general CAD/CAM software to develop a complete set of automotive panel mould CAD/CAM integrated system, and design several functional modules in the system.

The discrete point data of the main model of the data acquisition cover is usually measured by a three-coordinate measuring instrument, and the CAD software reads these discrete point data through the interface program. However, because the amount of data is too large for practical application, it is often necessary to simplify the node to greatly reduce the amount of data, so as to achieve the purpose of practical application. Then in the AutoCAD environment, the simplified discrete point data is converted into a visual surface wireframe.

Curved smooth coverings generally require surface smoothing, which can reduce the air resistance in the driving of the car, but also meet the user’s requirements for the beautiful and generous viewing effect of the car body. Before surface fitting, each type value point must be smoothed, so as to fit a high-quality panel surface and lay the foundation for subsequent work. Generally, CAD software does not have a module for smoothing discrete point data. Even with such a module, it is difficult to achieve satisfactory results. Therefore, in order to fit a high-quality smooth cover surface model, the collected discrete point data must be smoothed.

Concluding remarks Auto covering parts are the main parts that make up the car body, most of which are spatial curved shapes with large outline dimensions, so the development of covering parts molds is quite difficult. In China, most of the work of automobile covering mold design mainly relies on some qualitative theoretical analysis and empirical data of the designer. Not only the design time is long, but the influence of various parameters on the stamping forming is difficult to determine. After the design, it must be repeated in the trial phase. Modifications consume a lot of material and financial resources. Most of the large-scale CAD/CAM systems introduced in China are general-purpose software. In the process of designing and manufacturing panel molds, they often cannot meet the actual needs of production. Therefore, feature-based product modeling and systematic secondary development in the field of mold design and manufacturing can take advantage of the powerful functions of existing commodity software and save a lot of time in the development of grassroots software, thereby establishing a set of mold design suitable for domestic automotive panels A complete CAD/CAM integrated system for manufacturing, which can promote the development of the automotive industry efficiently, quickly and steadily.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Friday, January 21, 2022

Common sense and precautions for car maintenance

①Air filter
The correct installation of the air filter can reduce the abrasion of parts such as the cylinder, piston and piston ring. Reminder: Generally, it is cleaned every 5000 kilometers, and the air filter must be replaced every 10000 kilometers.
②Oil filter
The correct installation of the oil filter can prevent impurities from mixing into the oil during the use of the internal combustion engine, and prevent the wear of moving parts and blockage of the oil circuit. Remind you: the oil filter must be replaced when changing the lubricating oil, otherwise the quality of the lubricating oil will be affected. The oil and oil filter replacement cycle is generally 5000 kilometers.
③Fuel filter
The correct installation of the fuel filter can prevent cylinder wear caused by impurities and moisture mixed in during gasoline storage, transportation and filling. Remind you: In order to ensure that the engine is running well, the replacement cycle of the fuel filter is generally 20,000 kilometers or 1 year. Special suggestion: “Three filters” must be maintained by professional maintenance personnel.
Motor oil tips:
The common engine oil grades on the market are SJ, SL, SM. Among them, SM is the highest grade of lubricating oil in gasoline engines. The technology used is the most advanced and the lubrication quality is the highest. The smaller the number before the viscosity label W, the better the fluidity of the oil. The larger the number after W, the better the protection performance at high temperature.

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Analysis on the failure of vehicle intelligent transmission caused by dust

Passed many trials. I found the rule of occurrence of the above-mentioned failure: only when the car is running continuously, the automatic transmission will lock the gear and enter the protection mode. At this time, if the engine is turned off for a few seconds and the car is driven again, the automatic transmission will resume normal operation. According to the analysis of the failure law, the temperature of the engine and the automatic transmission changes significantly with the driving time, which is likely to be a stable display of a certain control or working element of the automatic transmission. Check the intake manifold, there is no air leakage; check the throttle control mechanism, there is no problem; check the idle motor, it is normal. Then read the dynamic data stream of the engine and found that 4 items of data are abnormal. The 4 items of data are: the fuel injection pulse width at idling speed is 7.30ms (the normal value is 2.6ms), and the signal voltage of the intake manifold absolute pressure sensor is 3.3V (the normal value should be 1.sv), the number of steps of the idle motor is 102 (the normal value is 30), the ignition advance angle is l-20, and it is unstable. Comprehensive analysis of the above four data, the focus of the contradiction is concentrated on the intake manifold absolute pressure sensor, its signal voltage is too high, making the injection pulse width increase. At this time, the oxygen sensor detects that the mixture is too rich.

The engine electronic control unit then instructs the idling stepper motor to increase the air intake, which results in an increase in the number of idling steps, and the engine electronic control unit also constantly adjusts the mixture. The inspection shows that the intake manifold is not leaking. Further inspection found that the engine accelerates vigorously and has good power. It shows that there will be no problems with the wrong valve phase and the clogging of the exhaust pipe. Apply vacuum to the absolute pressure sensor of the intake manifold through a vacuum gun. The sensor indicates that the sensor is normal. According to the inspection results of the above steps, it is concluded that the fault location may be in the EGR system. After disassembly and inspection, it was found that the EGR solenoid valve was stuck in the open position, the exhaust back pressure pipe was broken, and the exhaust back pressure valve base was severely cracked. Troubleshooting after replacing the EGR solenoid valve. Based on past experience, the first thing that comes to mind is the automatic transmission control unit. It is suspected that some of the electronic components will function abnormally at high temperatures, so I replaced it with an automatic transmission control unit of the same model that was running normally and tested it. The failure still failed. exclude.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Maintenance method of car battery in winter

  Many people who drive in winter often have this feeling: The battery that has just been fully charged will run out in a while.It feels like the electricity in the battery has been stolen, which is really a headache for many car owners.This is because the temperature in winter is low, and the capacity of the battery in a low temperature environment is much lower than that at room temperature.Therefore, in winter, it is extremely important to maintain the battery. Next, **car.com will introduce you to the maintenance of car batteries in winter.
  Why is the battery dead?
  There are still functions and components running after the vehicle is turned off
  Many car owners think that after closing the switch, the car is in a state of power failure, but in fact, many devices are still in operation. *It is common that the anti-theft system installed on many car models nowadays, as soon as the car door is locked, the system starts to work, and its power consumption is much smaller than that of equipment such as headlights.But after a few weeks, when the car is not started for a long time for charging and the battery is in a poor state of storage, the battery will run out.
  Is the car completely stationary after the flame is turned off?In the traditional impression, as long as the car key is turned to the electric door closed state, all parts of the car are in a stopped working state.However, when the engine temperature is too high, even if the car is turned off and the car key is pulled out of the car, the cooling system will automatically start to cool the engine system.Only when the engine system temperature drops, the cooling system will automatically stop working, usually this process takes 3 to 5 minutes.
  Forgot to turn off the lights after locking the car
  I stopped the car without turning off the lights, and after a night, the battery was overworked and shocked, and finally went on strike.Of course, many vehicles now have locked their headlights automatically, but there are still some vehicles that need to turn off their headlights manually, so pay attention outside.
  What are the precautions for using batteries in winter?
  1. If the battery is not used for a long time, it will slowly discharge by itself until it is scrapped.Therefore, the car should be started every once in a while to charge the battery.
  2. Avoid parking the car in the open parking lot for a long time. If it is parked for a long time, the battery must be removed and taken away to prevent the battery from freezing and damage.
  3. The storage capacity of the battery can be reflected on the dashboard.When the ammeter pointer shows that the battery is insufficient, charge it in time.
  4. The car engine is not easy to start in winter. The time to start the car should not exceed 5 seconds each time, and the interval between restarts should not be less than 15 seconds.
  5. When the electrolyte is deficient, distilled water or special rehydration should be added. Do not use pure drinking water instead, because the pure water contains a variety of trace elements, which will cause adverse effects on the battery.
  6. Clean the battery terminal at intervals and apply special grease to protect the wiring harness.Frequently check the accessories and connection lines on the battery.
  7. In daily driving, you should always check whether the small holes on the battery cover are ventilated. If the small holes on the battery cover are blocked, the hydrogen and oxygen produced cannot be discharged. When the electrolyte expands, the battery shell will be broken and the battery life will be affected.
  8. It is forbidden to use automotive electrical appliances after the car is turned off. Using the battery alone when the engine is not generating electricity will cause damage to it.
  9. Check whether there is any aging or short circuit in each part of the circuit to prevent the battery from being decommissioned early due to over-discharge.
  10. Generally speaking, the battery life of a car is about 2 to 3 years, but the modified car equipment will often damage the battery life, and it is necessary to check whether the battery is operating normally in winter.
  Specific methods of maintaining batteries:
  1. Wipe the outside of the battery with a damp cloth, and wipe clean the dust, oil, white powder and other dirt on the panel and column head that may cause leakage.Frequently scrub the stigma of the battery, not only will the white acid powder not accumulate on it, but the service life of the battery will be longer than expected.
  2. Open the water filling cover of the battery to see if the water level is in the normal position.Generally, there will be upper and lower limit markings on the side of the battery for your reference.If you find that the water level is lower than the lower mark, you must add distilled water. Do not add too much water. The standard is that the middle * of the upper and lower marks is appropriate.

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Tire rotation can extend the life of the spare tire and also has a shelf life

 

Many car owners will take their families out for self-driving tours, and the tires of their cars are also showing varying degrees of wear and tear, and many car owners are a little confused about the replacement of the tires.

Tire rotation can prolong life

I learned from many car 4S shops that now car owners are very careful about car maintenance, but many car owners think of changing tires when they encounter problems. In fact, it takes a lot of money to change tires frequently. In many cases, tire replacement is just a matter of cost. It can prolong the life of the tire, and the reasonable rotation can extend the life of the tire by 20%. It saves a lot of money for the owner.

The after-sales service manager of the Dongfeng Nissan franchise store, Wang? This Dan? Hemorrhoids ㄆ诨毨? ldquo;Rotation” is to ensure that each tire reaches the balance of work intensity. However, the tire replacement is also regular and cannot be arbitrarily. Change location.

Generally speaking, there are two ways to change tires. The first way is to swap front left tires and rear left tires, and swap front right tires and rear right tires; the second way is cross swapping, which means Change the left front tire to the right rear tire and the right front tire to the left rear tire. Relatively speaking, the second method is better.

As for the number of kilometers to be exchanged, the “Vehicle User Manual” of some models recommends that front-wheel drive vehicles should be changed every 8000 kilometers, while four-wheel drive vehicles need to be changed every 6000 kilometers. However, if there is no rotation for more than 20,000 kilometers, and tire wear has formed, it is not recommended to perform tire rotation to avoid deviation. But the king? Chuangyi, Jinghe, 飧赫飧龌龌莩地サ木咛逅鸷Naxie龆?ǎ?庋??W肌?p>    spare tires also have a shelf life

Now, in the process of using a car, most consumers don’t pay much attention to the spare tire, and they always think of the spare tire when the car tire is punctured or punctured. In fact, it is worth paying attention to consumers that if the specifications and structure of the spare tire are the same as the tires normally used on the car, the *scientific* reasonable method is to cross-rotate the spare tire together. In this way, a car will run 5~10. After 10,000 kilometers, the 5 tires (including the spare tire) wear very uniformly and can be replaced directly without wasting the spare tire.

However, because tires also have a shelf life, consumers must check the condition of the spare tire before using the spare tire. After all, the tire is a rubber product. If the spare tire is left for many years, it may crack. It is understood that, generally speaking, the shelf life of tires is calculated from the date of leaving the factory, which is about 5 years. Expired tires cannot be used anymore. Consumers should not be afraid of waste and should dispose of expired tires in time.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Thursday, January 20, 2022

Car maintenance: timely replacement of oil is very important

After a severe winter, the pace of spring is getting closer. Car owners at this time, in addition to checking for potential faults in their car, they should also pay special attention to the replacement and addition of oil. Let’s take a look at the editor of Liangchehui below!

1. Replace brake fluid

Some car owners often find that their car's brakes are soft after the end of the Spring Festival self-driving tour. The reason is that after the long-distance self-driving tour, the car's lubricating oil, coolant, and brake fluid loss is relatively large, but the car owner does not It is caused by timely replacement and addition. Therefore, in the spring after the weather has warmed up, car owners should check whether there is any shortage of these oils in their cars and replenish them in time.

In addition, when the brake fluid moves back and forth in the brake pipe, sludge and other impurities will be generated after a period of time, which directly affects the braking force of the vehicle. Therefore, the owner must replace the brake fluid every 20,000 to 40,000 kilometers.

2. Replace the dirty lubricating oil

After the Spring Festival, large-scale snowfall and icy roads across the country caused congestion. Vehicles on the way back and forth need to be started frequently. Engines often fail to warm up in time. Unevaporated water and insufficiently burned fuel will lubricate. The oil quality is degraded, which in turn leads to engine corrosion and sludge production, and the engine has been operating under high load.

Therefore, car owners can go to a professional store to check whether the lubricating oil is clean and flowing smoothly. In addition, low-temperature and high-load operation is prone to sludge and carbon deposits. If necessary, the lubricating oil should be replaced or the replacement interval should be reduced.

3. Replenish battery fluid

Battery* is afraid of low temperatures. The capacity of the battery in a low temperature environment is much lower than that at room temperature, and its performance will be significantly reduced. This is one of the reasons why the engine is difficult to start cold. Therefore, in the few heavy snow and low temperature weather after the Spring Festival, the owner of a liquid battery should replenish the electrolyte of the battery and adjust the specific gravity of the electrolyte. At the same time, the owner of the vehicle should clean the battery terminal and apply special grease to protect it, so as to ensure reliable starting and prolong the battery life.

If the car owner finds that some batteries have poor performance, it is best to replace them with new ones to ensure safe driving.

4. Check the coolant

With the advent of spring, as the temperature gradually rises, the coolant in the car’s water tank is insufficient. Many car owners will arbitrarily use clean water to replenish them when they find it. In fact, this method is unscientific. Clean water is easy to produce alkali and scale, and the boiling point is low, which is very easy to cause “boiling”. Therefore, even though the temperature has risen, car owners cannot change the coolant to clean water at will.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Introduction to the identification of second-hand retreaded tires

 

In addition to the important parts of second-hand cars, pay attention to the tires of second-hand cars. A friend of the reporter bought a second-hand car. At that time, the owner of the second-hand car dealer said that the tires were brand new, so the friend stopped paying attention to the tires. As a result, I drove for a few days after I bought it back but found that the tire was retreaded. In this regard, some automotive professionals said that when buying a second-hand car, we must look at whether there is a problem with the tire.

The first thing to look at is whether the tire has internal injuries, such as hardening and aging. To check whether the tire has been replaced by someone. It also depends on whether the tires have been refilled and shoddy. No matter how you look at this type of tires, it seems that there is no quality problem.

In addition, it depends on whether the tire has been retreaded. Compared with branded tires, the biggest difference between retreaded tires and branded tires lies in the wear resistance, and the most intuitive judgment method is:

Look, the tire tread shows blue light and the color is more natural;

Press, press the tread with your fingers, if there are no fingerprints left, it meets the quality requirements;

Pull, the rubber nail on the tread is not easy to break, and it can be restored to its original state immediately after releasing it;

scratching, scratching the tread with your nails, if no fingerprints are left, it meets the quality requirements.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Analysis of License Plate Recognition Technology

License plate recognition is a pattern recognition technology that uses the dynamic video or static image of the vehicle to automatically recognize the license plate number and the color of the license plate. The core of the technology includes license plate location algorithm, license plate character segmentation algorithm and optical character recognition algorithm.
The working principle of license plate recognition technology
Vehicle detection: Buried coil detection, infrared detection, radar detection technology, video detection and other methods can be used to sense the passing of the vehicle and trigger image capture.
Image collection: Real-time and uninterrupted recording and collection of passing vehicles through the high-definition camera capture host.
Preprocessing: noise filtering, automatic white balance, automatic exposure and gamma correction, edge enhancement, contrast adjustment, etc.
License plate location: Scan the rows and columns on the grayscale image after image preprocessing to determine the license plate area.
Character segmentation: After locating the license plate area in the image, through grayscale, binarization, etc., the character area is accurately located, and then the character segmentation is performed according to the character size characteristics.
Character Recognition: The segmented characters are scaled, feature extraction, and the standard character expression form in the character database template is matched and judged.
Result output: output the result of license plate recognition in text format.
License plate recognition technology workflow
The license plate recognition system adopts a highly modular design, which treats each link of the license plate recognition process as an independent module.
One, vehicle detection and tracking module
The vehicle detection and tracking module mainly analyzes the video stream, judges the position of the vehicle in it, tracks the vehicle in the image, and records a close-up picture of the vehicle at the best time of the vehicle position. Thanks to the addition of the tracking module, the system can be very good To overcome various external interferences, make more reasonable recognition results, detect unlicensed vehicles and output the results.
2. License plate positioning module
The license plate location module is a very important link and the basis of the follow-up link. Its accuracy has a huge impact on the overall system performance. The license plate system completely abandons the previous algorithmic ideas, and realizes a new algorithm for license plate positioning based on the fusion of multiple features based on learning, which is suitable for various complex background environments and different camera angles.
3. License plate correction and fine positioning module
Due to the limitation of shooting conditions, the license plate in the image is always inevitably tilted. A correction and fine positioning link is required to further improve the quality of the license plate image and prepare for the segmentation and recognition module. Using a well-designed fast image processing filter, not only the calculation is fast, but also the overall information of the license plate is used to avoid the influence of local noise. Another advantage of using this algorithm is that through the analysis of multiple intermediate results, the license plate can also be precisely located, which further reduces the impact of non-license plate areas.
Four, license plate segmentation module
The license plate segmentation module of the license plate system utilizes the grayscale, color, edge distribution and other characteristics of the license plate text, which can better suppress the influence of other noise around the license plate, and can tolerate the license plate with a certain tilt angle. This algorithm is conducive to applications such as mobile inspections where the license plate image is noisy.
Five, license plate recognition module
In the license plate recognition system, a combination of multiple recognition models is usually used for license plate recognition, and a hierarchical character recognition process is constructed, which can effectively improve the accuracy of character recognition. On the other hand, before character recognition, the use of computer intelligent algorithms for pre-processing of character images can not only preserve image information as much as possible, but also improve image quality, improve the distinguishability of similar characters, and ensure the reliability of character recognition.
Six, license plate recognition result decision-making module
Recognition result decision-making module, specifically, the decision-making module uses the historical record left by the process of a license plate through the field of vision to make intelligent decision-making on the recognition result. It obtains the comprehensive credibility evaluation of the license plate by calculating the number of observation frames, the stability of the recognition result, trajectory stability, speed stability, average credibility, and similarity, so as to determine whether to continue tracking the license plate or output Identify the result, or reject the result. This method comprehensively utilizes the information of all frames, reduces the accidental errors caused by the previous recognition algorithms based on a single image, and greatly improves the recognition rate of the system and the correctness and reliability of the recognition results.
Seven, license plate tracking module
The    license plate tracking module records various historical information such as the position, appearance, recognition result, credibility, etc. of the license plate in each frame of the vehicle’s driving process. Because the license plate tracking module uses a motion model with a certain fault tolerance and an update model, those license plates that are blocked or blurred for a short time can still be tracked and predicted correctly, and only one recognition result will be output in the end.

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Wednesday, January 19, 2022

Talking about the three major inspection and maintenance of deep winter automobiles

Recently, the country has cooled down in a large area. While we are adding clothes, it is time for a vehicle inspection and maintenance for our car. As the saying goes, three separates and seven separates. If the car is not well maintained, its performance will be greatly affected.

If your car has obvious scratches and scratches, it should be painted in time. Because the role of paint is not only beautiful, its more important function is rust prevention.

Pick a sunny day and do a whole car waxing to maintain the paint surface of the car. For areas that have been stained, do not polish them multiple times, but do the paint again.

The tire rubber becomes harder in winter and is relatively brittle. Not only will the friction coefficient be reduced, but it is also easier to leak air and puncture the tire. Check whether the tire has obvious injuries, scratches, and whether the tire pressure is standard. Pay attention to frequently cleaning up the inclusions in the tire pattern and replace the tires with larger wear. In areas with a lot of ice and snow, it is a good way to use winter tires.

Do not forget to check the car lights. If the headlight bulbs become dim, they need to be replaced in time, and the fog lights should not be ignored. Brake lights are more likely to be damaged, so they must be checked and replaced in time.

Also pay attention when using glass washer, and it is better to buy winter special products in colder areas.

If the wiper is used for too long, it must be replaced. In winter, there is a lot of rain and snow, and the visibility is not very good. You must pay attention to the windshield vision.

With the change of temperature, the viscosity of ordinary lubricating oil will also deteriorate with the decrease of temperature, and the increase of frictional resistance when automobile parts are in motion will cause difficulty in cold start of the automobile, decrease of engine power, and even cause burning of bushes and axles. Wait for the accident, and change the oil in winter.

It is more difficult to start the car in winter, and the battery is more likely to lose power. The oxides on the battery poles should be removed to ensure good contact with the poles and eliminate hidden dangers that are not easy to start. For car owners who use liquid-filled batteries, check the height of the battery electrolyte level. If the liquid level is lower than the mark, add distilled water. Cars with insufficient power should be sent to the repair shop for recharging in time.

The antifreeze is changed every two years under normal circumstances. In winter, it is best to go to the repair shop to do a freezing point test to determine whether the antifreeze needs to be replaced.

The heating system needs to be checked and repaired in time if there is something wrong.

Brake fluid is safe and not careless. It must be replaced with good quality winter brake fluid.

It is necessary to carefully inspect the suspension and the front axle to see if there is oil leakage, etc. On the flat ground, use your body to press on the top of the 4 wheels of the car to see if there is any abnormal noise.

Brake pads and brake discs and brake drums should also be checked. Including handbrake system. If there is no problem, use a blow gun from a repair shop to clean the dust on the drum brake. The uneven brake pads should also be polished to make them smooth.

In fact, many of these maintenance items can be carried out regularly through the owner himself. Maybe many owners are busy or neglect to take care of their car. People say that you don’t love cars, and cars don’t love you. The precautions mentioned above are actually very simple, and they are not just for winter. The author still hopes that every car owner will develop a good habit of checking the car regularly.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Causes of confusion in our city’s auto parts market

 

At the same time, some business departments have become a place for thieves to sell dirty, making criminals even bolder and causing harm to public order. What makes people feel righteous is that this situation has become a strange phenomenon in the auto parts industry that the viewers are not surprised, the others are not afraid, and the recipients are worthy of it. It also severely threatened the status of state-owned channels. At present, our country is still in the primary stage of socialism, privately owned vehicles are less than 10 of the total number of vehicles, and most of the vehicles are public vehicles.

Whether it is buying auto parts or repairs, it is public money, and the purchaser does not need to pay for it. Therefore, buying accessories is not like buying department stores and daily necessities. If private individuals can benefit from it, why not do it. Moreover, most of the leaders of car users are not familiar with auto parts, let alone product quality. There are not many vehicles in some units, and these vehicles are in an important position for accomplishing the tasks of the unit and as a tool for leadership. So as long as the vehicle is running, the requirements for other issues are not strict. This is also one of the reasons for the existence of strange phenomena.

At present, there are too many auto parts outlets in Chongqing, which greatly exceed social needs. We should no longer blindly develop social outlets. At the same time, we must clean up existing outlets, resolutely ban illegal operators, rectify unqualified ones, and strengthen industry management. , Implement macro control, rational layout, and strengthen the management of purchases, finances, and prices. The main channel should provide assistance, support and guidance to social outlets in business.

For automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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CNC Machining Services Aluminum Product Machining Technology

Aluminum is the most widely used and widely used metal material among non-ferrous metals, and its application range is still expanding. There are many kinds of aluminum products produced by aluminum materials. According to statistics, there are more than 700,000 kinds of aluminum products, and various industries such as construction and decoration, transportation, and aerospace have different needs. Today, I will introduce to you the processing technology of aluminum products and how to avoid processing deformation.

1、 Low density. The density of aluminum is about 2.7g/cm3. Its density is only 1/3 of iron or copper.

2、High plasticity. Aluminum has good ductility and can be made into various products through pressure processing methods such as extrusion and stretching.

3、Corrosion resistance. Aluminum is a highly negatively charged metal. A protective oxide film will be formed on the surface under natural conditions or anodizing oxidation. It has much better corrosion resistance than steel.

4、The strength of pure aluminum which is easy to be strengthened is not high, but its strength can be improved by anodizing oxidation

5、Easy surface treatment Surface treatment can further improve or change the surface properties of aluminum anodizing process is quite mature, stable operation, has been widely used in the processing of aluminum products

6、Good electrical conductivity and easy to recycle.

Aluminum machining technology

The stamping of aluminium products

1、Cold punch

Use material aluminum pellets. The extrusion machine and the mold are used for one-time molding, which is suitable for cylindrical products or product shapes that are difficult to achieve by the stretching process, such as oval, square, and rectangular products. (Picture 1 is machine, picture 2 is aluminum pellets, picture is 3 products)

The tonnage of the machine used is related to the cross-sectional area of ​​the product. The gap between the upper die punch and the lower die tungsten steel is the wall thickness of the product, and the vertical gap between the upper die punch and the lower die tungsten steel to the bottom dead center is the The top thickness of the product. (example 4)

Advantages: shorter die opening period, lower development cost than drawing die.

Disadvantages: the production process is long, the product size fluctuates greatly in the process, and the labor cost is high.

2、Tensile

Using material aluminum skin. The continuous mold machine and the mold are used for multiple deformations to meet the requirements of the shape, suitable for non-columnar bodies (products with curved aluminum materials). (Picture 5 is machine, picture 6 is mold, picture 7 is product)

Advantages: More complex and multiple-deformed products have stable dimensional control during the production process, and the product surface is smoother.

Disadvantages: high mold cost, relatively long development cycle, high requirements for machine selection and accuracy.

Surface treatment of aluminum products

1、Sandblasting (shot blasting)

The process of using the impact of high-speed sand flow to clean and roughen the metal surface.

The surface treatment of cnc aluminum parts in this way can make the surface of the workpiece obtain a certain degree of cleanliness and different roughness, and improve the mechanical properties of the workpiece surface, thus improving the fatigue resistance of the workpiece and increasing the gap between it and the coating. The adhesion force extends the durability of the coating film and is also conducive to the leveling and decoration of the coating. We often see this process in various products of Apple.

2、Polishing

The using of mechanical, chemical or electrical chemical effects to reduce the surface roughness of the workpiece to obtain a bright, smooth surface processing method. The polishing process is mainly divided into: mechanical polishing, chemical polishing, and electrolytic polishing. The aluminum parts can be close to the mirror effect of stainless steel after mechanical polishing + electrolytic polishing. This process gives people a sense of high-end simplicity and stylish future.

3、Wire drawing

Metal wire drawing is the manufacturing process of repeatedly scraping aluminum plates out of lines with sandpaper. Wire drawing can be divided into straight wire drawing, chaotic wire drawing, swirl drawing, thread drawing. The metal wire drawing process can clearly show every minute wire mark, so that the metal matte shines with fine hair luster, and the product has a sense of fashion and technology.

4、Dia-cutting

The diamond knives are reinforced on the high-speed rotating (generally 20,000 rpm) spindle of the fine-engraving machine to cut the parts, and a local highlight area is generated on the surface of the product. The brightness of the cutting highlights is affected by the speed of the milling drill bit. The faster the drill speed, the brighter the cutting highlights, otherwise, the darker it is and the tool marks are likely to occur. High-gloss and high-gloss cutting are particularly used in mobile phones, such as iphone5. In recent years, some high-end TV metal frames have adopted high-gloss milling technology, coupled with anodizing and drawing processes, making the TV as a whole full of fashion and technological sharpness.

5、Anodizing oxidation

Anodizing refers to the electrical chemical oxidation of metals or alloys. Aluminum and its alloys form an oxide film on the aluminum product (anode) due to the action of the applied current under the corresponding electrolyte and specific process conditions. Anodizing can not only solve the defects of aluminum surface hardness and wear resistance, but also prolong the service life of aluminum and enhance its aesthetics. It has become an indispensable part of aluminum surface treatment and is currently the most widely used and very successful process.

6、Double colors anode

Two-color anodizing refers to anodizing a product and assigning different colors to a specific area. The two-color anodizing process is rarely used in TV industry because of its complicated process and high cost.But through the contrast between the two colors, it can better reflect the unique appearance of the high-end products

Process measures and operation techniques to reduce aluminum deformation

There are many reasons for machining deformation of aluminum parts, which are related to the shape production conditions of material parts and so on. There are mainly the following aspects: deformation caused by internal stress of blank, deformation caused by cutting force and cutting heat, deformation caused by clamping force

Process measures to reduce machining deformation

1、Reduce the internal stress of the hair culture

Natural or artificial aging and vibration treatment can partially eliminate the internal stress of the blank. Pre-processing is also an effective process method. For the blank with fat head and big ears, due to the large margin, the deformation after processing is also large. If the excess part of the blank is pre-processed and the margin of each part is reduced, not only can the processing deformation of the subsequent process be reduced, but also a part of the internal stress can be released after pre-processed for a period of time.

2、Improve the cutting ability of the tool

The material and geometric parameters of the tool have an important influence on the cutting force and cutting heat. The correct selection of the tool is essential to reduce the deformation of the parts.

1) Reasonably choose the tool geometry parameters.

①The rake angle: Under the condition of maintaining the strength of the cutting edge, the rake angle should be appropriately selected to be larger. On the one hand, it can grind a sharp cutting edge, and on the other hand, it can reduce cutting deformation and smooth chip removal, thereby reducing cutting force and cutting temperature. Never use negative rake angle tools.

②Clear angle: The size of the relief angle has a direct impact on the wear of the flank surface and the quality of the machined surface. Cutting thickness is an important condition for selecting the relief angle. During rough milling, due to the large feed rate, heavy cutting load, and large heat generation, good heat dissipation conditions of the tool are required. Therefore, the relief angle should be selected smaller. When finishing milling, the cutting edge is required to be sharp, reduce the friction between the flank face and the machined surface, and reduce the elastic deformation. Therefore, the relief angle should be selected larger.

③Helix angle: In order to make the milling smooth and reduce the milling force, the helix angle should be selected as large as possible.

④ Entering angle: Appropriately reducing the entering angle can improve the heat dissipation conditions and reduce the average temperature of the processing area.

2)Improving tool structure.

①Reduce the number of teeth of the milling cutter and increase the chip space. Due to the large plasticity of the aluminum material, the large cutting deformation during processing requires a large chip space, so the bottom radius of the chip pocket should be larger and the number of milling cutter teeth should be small.

②Fine grinding of the teeth. The roughness value of the cutting edge of the tooth should be less than Ra=0.4um. Before using a new knife, you should lightly sharpen the front and back of the teeth with a fine oil stone to eliminate the remaining burrs and slight serrations when sharpening the teeth. In this way, not only the cutting heat can be reduced but also the cutting deformation is relatively small.

③Strictly control the wear standard of the tool. After the tool is worn, the surface roughness value of the workpiece increases, the cutting temperature rises, and the deformation of the workpiece increases. Therefore, in addition to the selection of tool materials with good wear resistance, the tool wear standard should not be greater than 0.2mm, otherwise it is easy to produce built-up edge. When cutting, the temperature of the workpiece should generally not exceed 100°C to prevent deformation.

3.Improving the clamping method of workpiece

For thin – walled aluminum workpiece with poor rigidity, the following clamping method can be used to reduce deformation:

①For thin-walled bushing parts, if a three-jaw self-centering chuck or spring chuck is used to clamp from the radial direction, once it is released after processing, the workpiece will inevitably be deformed. At this time, the method of pressing the axial end face with better rigidity should be used. To locate the inner hole of the part, make a self-made threaded through mandrel, sleeve it into the inner hole of the part, and press the end face with a cover plate on it, and then tighten it with a nut. The clamping deformation can be avoided when the outer circle is processed, thereby obtaining satisfactory processing accuracy.

②When processing thin-walled and thin-plate workpieces, it is best to use vacuum suction cups to obtain evenly distributed clamping force, and then process with a small amount of cutting, which can well prevent workpiece deformation.

In addition, a packing method can also be used. In order to increase the process rigidity of thin-walled workpieces, medium can be filled inside the workpiece to reduce the deformation of the workpiece during clamping and cutting. For example, pour a urea melt containing 3% to 6% potassium nitrate into the workpiece, and after processing, immerse the workpiece in water or alcohol to dissolve the filler and pour it out.

4.Reasonable arrangement of process

During high-speed cutting, due to the large machining allowance and intermittent cutting, the milling process often produces vibration, which affects the machining accuracy and surface roughness. Therefore, the CNC high-speed cutting process can generally be divided into: rough machining-semi-finish machining-clear corner machining-finishing and other processes. For parts with high precision requirements, it is sometimes necessary to perform secondary semi-finishing and then finishing. After rough machining, the parts can be cooled naturally to eliminate internal stress caused by rough machining and reduce deformation. The margin left after rough machining should be greater than the amount of deformation, generally 1 to 2 mm. During finishing, the finishing surface of the part should maintain a uniform machining allowance, generally 0.2-0.5mm is appropriate, so that the tool is in a stable state during the machining process, which can greatly reduce cutting deformation, obtain good surface machining quality, and ensure The accuracy of the product.

The Operation technique of reducing the machining deformation

1. For parts with large machining allowance, in order to have better heat dissipation conditions during the machining process and avoid heat concentration, symmetrical machining should be used during machining. If there is a 90mm thick sheet that needs to be processed to 60mm, if one side is milled and the other side is milled immediately, and the final size is processed once, the flatness will reach 5mm; if repeated feed symmetrical processing is used, each side is processed twice The final size can guarantee a flatness of 0.3mm.

2. If there are multiple cavities on the sheet metal part, it is not advisable to use a cavity-by-cavity sequential processing method during processing, as this will easily cause uneven stress and deformation of the parts. Multi-layer processing is adopted, and each layer is processed to all cavities at the same time as much as possible, and then the next layer is processed to make the parts evenly stressed and reduce deformation.

3. Reduce cutting force and cutting heat by changing the cutting amount. Among the three elements of cutting amount, the amount of back-cutting has a great influence on cutting force. If the machining allowance is too large, the cutting force of one pass is too large, which will not only deform the parts, but also affect the rigidity of the machine tool spindle and reduce the durability of the tool. If you reduce the amount of knives backed, the production efficiency will be greatly reduced. However, high-speed milling in Cnc Machining can overcome this problem. While reducing the amount of back-grabbing, as long as the feed is correspondingly increased and the speed of the machine tool is increased, the cutting force can be reduced while ensuring the processing efficiency.

4. The order of the knife should also be paid attention to. Rough machining emphasizes the improvement of machining efficiency and the pursuit of removal rate per unit time. Generally, upside milling can be used. That is to remove the excess material on the surface of the blank with the fastest speed and the shortest time, and basically form the geometric contour required for finishing. The emphasis of finishing is high precision and high quality, and down milling should be used. Because the cutting thickness of the cutter teeth gradually decreases from the maximum to zero during down milling, the degree of work hardening is greatly reduced, while reducing the degree of deformation of the parts.

5. The deformation of thin-walled workpieces due to clamping during processing is difficult to avoid even for finishing. In order to reduce the deformation of the workpiece to the minimum, you can loosen the compression piece before the final size is reached in the finishing process, so that the workpiece can be restored to its original shape freely, and then slightly compressed, subject to the rigid clamping of the workpiece (completely By hand), so you can get the ideal processing effect. In short, the point of action of the clamping force is best on the supporting surface, and the clamping force should act in the direction of good rigidity of the workpiece. Under the premise of ensuring that the workpiece does not loosen, the smaller the clamping force, the better.

6. When machining parts with cavities, try not to let the milling cutter plunge directly into the part like a drill bit, resulting in insufficient chip holding space of the milling cutter, unsmooth chip removal, and overheating, expansion and collapse of the part. Unfavorable phenomena such as knife and broken knife. First, drill the hole with a drill of the same size as the milling cutter or one size larger, and then mill it with the milling cutter. Alternatively, the CAM software can be used to produce the spiral cutting program.

Keywords:

cnc milling parts manufacturers,cnc milling suppliers,aluminum parts manufacturing,oem casting parts,cnc spare parts suppliers,diy cnc parts,cnc milling machine parts components,diy Cnc Machine parts,precision turned parts china,turned parts

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Energy-saving emission reduction standards to upgrade small engines should be born

Major car companies have “reduced cylinders” turbocharging will become an important driving force

In March of this year, General Motors released a new generation of Ecotec engine family in Detroit. The engine family contains 11 small displacement engines, with displacements mainly concentrated in 1.0L to 1.5L. In the future, GM will sell many small cars and compacts. SUV will use these small displacement engines, including the new generation Cruze of Chevrolet launched in the Chinese market.

Also in March, Porsche CEO Mullen said that its Boxster and Cayman models will use four-cylinder engines, and the powertrains of these two models are currently six-cylinder engines; Ford’s joint venture in China, Changan Ford, also ushered in EcoBoost engines. The smallest member of the family has officially rolled off the 1.0-liter EcoBoost engine.

At the end of February, Volvo Car announced its Drive-E powertrain series in a high-profile manner. The distinguishing feature of this powertrain is miniaturization. Use more four-cylinder engines.

The world’s major car companies have “reduced cylinders” one after another, indicating that the era of engine downsizing has begun.

Energy-saving emission reduction standards to upgrade small engines should be born

In fact, the miniaturization of engines is not a new topic. As early as 2008, automobile companies such as General Motors and Ford in the United States proposed small engine development strategies. With the arrival of the time node for the assessment of energy saving and emission reduction by governments of various countries, the trend of engine miniaturization has become more obvious.

In January of this year, my country officially released the “Passenger Vehicle Fuel Consumption Limits” and “Passenger Vehicle Fuel Consumption Evaluation Methods and Indicators” for soliciting comments, pointing out that the fourth stage standards continue to use vehicle fuels grouped by vehicle kerb quality Consumption evaluation system, while improving the technical characteristics and requirements of special structure vehicles, and further tightening the limits of passenger vehicle fuel consumption. This is an important policy refinement and strong promotion following the State Council's proposal in 2012 that the average fuel consumption of new cars in 2015 and 2020 will reach 6.9L and 5.0L per 100 kilometers.

The European Parliament also set a world's most stringent vehicle carbon emission control target in February: By 2020, 95% of new vehicles sold in the EU must achieve an average level of carbon dioxide emissions of no more than 95 grams per kilometer (approximately 100%). Km 3.8 liters), by 2021, all new cars sold in the EU must meet the above emission requirements. If automakers fail to meet the above standards by then, vehicles that exceed the carbon emission standards will be subject to a fine of 95 Euros (approximately US$130.60)/g/km per vehicle in the European Union. In addition, the U.S. market has also proposed the goal of achieving an average fuel consumption of approximately 6.6 liters and 4.3 liters for new cars in 2016 and 2020, respectively.

It is against this background that the world's major car companies have begun to accelerate the launch of small engines. The mid-to-high-end cars and SUVs that originally used large-displacement engines have also begun to “slim down” to reduce the cost of new cars. Average fuel consumption.

Turbo boosts small engines to welcome market spring

Engine downsizing can reduce fuel consumption, but the pain point for consumers is whether the power efficiency of the downsized engine remains the same. Therefore, how to reduce the engine displacement while ensuring sufficient power has become the key to the success of the miniaturized engine in the market, and the development of turbocharging technology has become a top priority.

Turbocharging increases the engine power by more than 30% by improving the intake efficiency, while the fuel consumption value remains close to the original level. This means that the reduction in the number of cylinders in the engine does not mean a loss of power. After the use of turbocharging technology, the original 6-cylinder engine can be completely replaced by a 4-cylinder.

Automotive turbocharging* was first introduced by Honeywell in the United States in 1962. As of today, turbocharging technology has gone through half a century. Compared with its first birth, this technology has also made a qualitative leap. . For example, through the improvement of materials, the turbocharger can withstand higher temperatures, and the service life is the same as the engine life; the improvement of the cooling cycle system can make the vehicle stop immediately without idling; in addition, the current turbocharger is in a low-speed state It can work, and it can also be fully matched with the start-stop system.

It is worth mentioning that turbocharging has never stopped its efforts to improve fuel economy. According to Honeywell, the company has launched a new generation of products in about three years. The fuel consumption of new products has improved by 2% to 3% through ordinary technology upgrades. Currently, the highest fuel consumption can be increased by 5% through technological innovation. To 10%.

However, with the gradual miniaturization of onboard engines, achieving high torque at low speeds is still a major challenge for turbocharging. At present, some companies are trying to apply the VNT technology, which is mostly used in diesel engines, to gasoline engines, but this technology is currently relatively expensive. In response to this, Honeywell has introduced DualBoost technology. The axial turbine is matched with the back-to-back double-sided compressor, which further shortens the time to reach the required torque, and has better rapid response capabilities and steady-state performance.

With the energy shortage and the tightening of emission restriction policies in various countries, the degree of attention to turbocharging has gradually increased. In Western Europe, almost 70% of new cars are equipped with turbocharging. Although the current application status of turbochargers in the Chinese market is not optimistic, the proportion of new car sales is currently only 22%, but in recent years, consumers’ acceptance of turbochargers has shown a clear upward trend. A consumer survey from Sinotrust found that among the nearly 50,000 interviewees who participated in the survey, nearly 80% of the interviewees said they knew about turbocharged engines, and 60% of those who had plans to buy a car Will consider buying turbocharged models. This is related to the continuous maturity of turbocharging technology and the gradual reduction of costs after large-scale applications.

With the strengthening of the engine miniaturization trend, more and more car companies have begun to adopt turbocharging technology. In addition to multinational companies, local auto companies such as Brilliance, Great Wall and Chery are also accelerating the application of turbocharging technology. This means that, whether in the high-end, terminal or low-end markets, turbocharging technology is gradually infiltrating major market segments, and engine miniaturization may come faster than imagined.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Urea for vehicles is a heavy-duty diesel vehicle that meets the National IV emission standards

<p style=”margin: 0px; font-family: Times New Roman; line-height: 22px; white-space: normal;”><span style=”margin: 0px; font-size: 14pt;”>Urea for vehicles is A must-have product for heavy-duty diesel vehicles to meet the National IV emission standards. Urea for vehicles refers to an aqueous urea solution with a urea concentration of 32.5% and ultrapure water as the solvent. The raw materials are urea crystals and ultrapure water. For heavy-duty trucks, buses and other diesel vehicles to meet the National IV emission standards, a suitable SCR system must be selected for exhaust gas treatment, and this system must use urea solution to treat the nitrogen oxides in the exhaust gas. Therefore, vehicle urea solution has become an essential product for heavy-duty trucks and buses to meet the National IV emission standards. <br style=”margin: 0px;” />&nbsp;&nbsp;&nbsp;&nbsp; SCR is the best choice for reducing emissions in China. At present, the current domestic diesel national standard GB19147-2009 requires a sulfur content of ≤350ppm, while the ECR-DOC technology requires a sulfur content of oil products below 10ppm, so there is no promotion condition in China for the time being. SCR can withstand 350ppm of sulfur-containing oil, so it has a technical basis for promotion. Because the fuel economy of the National IV engine using SCR technology is better than EGR technology, the engine changes are small, the fuel and oil requirements are lower, the technology upgrade continuity has advantages, the SCR catalyst has good durability and there is no catalyst blockage Therefore, SCR technology is the most suitable technology route for the emission reduction of heavy diesel vehicles in China's national conditions. <br style=”margin: 0px;” />&nbsp;&nbsp; Urea for vehicles is an aqueous urea solution with a concentration of 32.5% and a solvent of ultrapure water. The raw materials for production are urea crystals and ultrapure water. The key point is the purity of the raw materials . From the perspective of the production process, although the purity requirements for the raw material of urea for vehicles are higher than the requirements for general industrial use, the current domestic process can already meet the actual application needs. The production process of automotive urea is not sufficient to build a high barrier to entry. <br style=”margin: 0px;” />  The domestic vehicle urea is mainly purified from industrial urea. The main principles are: 1) When the temperature is 70-75℃, the urea is hydrolyzed in the aqueous solution. 2) When the temperature is below 30°C, urea will crystallize from the aqueous solution again. 3) Each time of hydrolysis and crystallization, its purity will be greatly improved. Generally, once industrial grade urea is used for hydrolysis and crystallization, it can meet the requirements of automotive urea standards, and the output ratio is 1.5:1. <br style=”margin: 0px;” />  Urea for vehicles must use first-class ultrapure water in the electronics industry. Because the SCR catalyst carrier is prone to metal ion poisoning and loses its catalytic effect, the automotive urea solution must use first-grade ultrapure water in the electronics industry (resistivity ≥18MΩ?cm). The car urea solution will start to freeze at -11°C, and it will freeze completely at -20°C in actual use. The current technology is to reduce the freezing point of the solution by adding a modifier, and adding a heating device to prevent the solution from freezing. </span></p><p style=”margin: 0px; font-family: Times New Roman; line-height: 22px; white-space: normal;”><span style=”margin: 0px; font-size: 14pt;”>Urea solution for vehicles (AdBlue) is a solution prepared with high-purity urea without any other additives and pure water. The urea content in the solution is 32.5% (mass fraction). Most domestic and foreign heavy-duty diesel engine manufacturers have adopted SCR (Selective Catalytic Reduction) technology to meet the requirements of Euro IV and Euro V motor vehicle emission standards. Vehicles that choose SCR technology must add urea solution as a catalytic reducing agent to make the vehicle meet the emission standards. <br style=”margin: 0px;” />&nbsp; &nbsp; &nbsp; Diesel engine exhaust gas treatment fluid (commonly known as: automobile urea, automobile urea, automobile environmental protection urea), called AdBlue in China and Europe, and called in America It is DEF and is called ARLA32 in Brazil. AdBlue is a high-purity transparent liquid composed of 32.5% high-purity urea and 67.5% deionized water, with a slight ammonia smell. If it splashes, the water evaporates and crystals form. AdBlue is used in cars, trucks, buses and heavy-duty non-road use diesel engine vehicles equipped with SCR (vehicle selective catalytic reduction exhaust gas aftertreatment) system. It is a consumable that must be used in SCR technology. The harmful nitrogen oxides emitted by diesel engines are converted into harmless water vapor and nitrogen. The main components of the SCR system include catalyst, AdBlue injection device, AdBlue container and AdBlue dose controller. Almost all heavy-duty vehicle manufacturers in Europe, the United States, and Asia, including China, also equip their vehicles with selective catalytic reduction systems and AdBlue working fluids to meet the new nitrogen oxide emission standards (such as Euro 4, Euro 5) AdBlue and Under the combined effect of SCR technology, it can optimize engine performance and fuel consumption, reduce diesel consumption by up to 6%, and significantly reduce costs. The average consumption of AdBlue is 5% of general diesel consumption, which is about 1.5 liters per 100 kilometers of highway driving. AdBlue can only be used to configure the engine combination of the SCR system, because it is neither a fuel nor a fuel additive. AdBlue implements standards in compliance with ISO22241, DIN70070 and CEFIC regulations to ensure the effective operation of the SCR system. AdBlue is not harmful to the environment and is classified as a transportable liquid with the lowest risk. <br style=”margin: 0px;” /><br style=”margin: 0px;” />   At present, domestic automotive urea production is dominated by small and medium-sized private enterprises, and channel sales capabilities are lacking. The domestic automotive urea is mainly produced by enterprises such as Jiangsu Klanso, Liaoning Rundi, Jingmai Chemical, and Beijing Yili. The production capacity of each company is between 100,000 to 300,000 tons per year. Among them, Jiangsu Klanzol and Liaoning Rundi have an annual production capacity of 300,000 tons, and have a series of modifier patents for the problem of low-temperature solidification of urea for vehicles. Jiangsu Klanzo has exported the urea solution for Klanzo vehicles to Russia, Eastern Europe and South America. But for the current small private enterprises, the inability to master the core sales channels is the fundamental weakness of their development. <br style=”margin: 0px;” />&nbsp;Guangdong Chuanghongyu urea energy-saving products came into being. For details, please contact 136 8021 1314&nbsp;</span></p>&lt;div class=”content” style=” margin: 0px;”>&lt;/div>

Link to this article:Urea for vehicles is a heavy-duty diesel vehicle that meets the National IV emission standards

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Alternate vehicles, transportation equipment and field work machine oil in all seasons adapt to changes in temperature

 

Foreign oil companies adopt tracking services for key users. Whenever the oil change period is approaching and users need to buy oil, they will test the oil for free in advance, issue an inspection report, and actively provide key users with a scientific basis for oil change. This kind of thoughtful service not only shortens the distance with users, but also improves the credibility of the brand.

The alternation of the four seasons requires the oil used in vehicles, transportation equipment and field work tools to adapt to changes in temperature, especially in the north. Lubricants of different viscosity grades are usually replaced at the end of autumn and spring, thus forming a peak season for lubricating oil sales. Foreign oil companies attach great importance to the promotional activities in these two seasons. In the autumn, they launched low pour point, low viscosity grades of multi-grade antifreeze and antifreeze, and accompanied the promotion activities to choose gifts that reflect the characteristics of winter; at the turn of spring and summer, they also promote high viscosity grade oils, and there are also optional gifts. Summer characteristics.

Lubricant is a product with high technical content. General users often don’t know the reason for their complicated technical performance, and they don’t know how to choose various brands. For this reason, foreign oil companies often adopt methods such as holding technical exchange meetings, distributing easy-to-understand oil user manuals, and returning visits to answer questions, etc., to conduct extensive and in-depth knowledge marketing.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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Advantages of Doppy Dual Channel (Economical) Micro Lubrication Equipment

Doppelt is committed to the development of the lubrication industry in the direction of energy conservation and environmental protection, and is committed to the research and application of micro-lubrication in the field of mechanical processing and continuously launches new products in combination with practical applications.We have accumulated rich experience in the application of micro-lubrication in metal cutting, high-speed bearings, various common friction lubrication and other fields.New products are emerging in endlessly, and they are becoming a weapon for customers to reduce manufacturing costs, increase production efficiency, and green manufacturing.

The metal cutting dual-channel micro-lubrication device is a new economical oil-air lubrication device developed by Doppel according to the actual needs of customers.Customers can choose the corresponding parts according to the actual use. This model allows customers to have more autonomy in reducing the cost of oil and gas lubrication equipment, improving the use effect, and improving flexibility.The dual-channel micro-lubrication device mainly includes the following functions:

1. Adjustable oil supply volume: The oil volume adjustment of the dual-channel micro-lubrication device adopts the frequency + single oil supply adjustment mode. Set the oil supply frequency and the single oil supply volume to get the oil output per unit time. quantity.

2. Fast response: The outstanding feature of the dual-channel micro-lubrication device is fast response.In the practical application of oil-air lubrication, most lubrication occasions require quick response.The special design structure of the dual-channel micro-lubrication device (separate delivery of oil and gas) avoids the shortcomings of too long response time, and its application scenarios have also been expanded.

3. Flexible and lightweight: the dual-channel micro-lubrication device is small in size and can be used in small spaces.

4. Strong equipment stability: Compressed air is the power of the device, with few moving parts, low maintenance, and strong stability.

With the increasing demand for lubrication, lubrication equipment also needs continuous improvement and innovation. It is Doppy’s direction to improve the practicability of lubrication equipment and reduce costs and increase efficiency.Doppy will also help more customers to make more efforts in cost reduction and green manufacturing.

Link to this article:Advantages of Doppy Dual Channel (Economical) Micro Lubrication Equipment

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