Monday, July 15, 2019

Automatic Lathe Machining, Stainless Steel Machine Tool More Difficult Than Ordinary Machine Tool

cnc machine shop china, there is no absolute difficulty in machining, and it is the problem of cutter and program in the last analysis. If the cutter is usually not selected properly and programmed properly, it will directly cause the tool to become rapidly scrapped, thus breaking the spindle. Because this is a complex problem with many factors, using a manual machine tool reduces the cost risk, but requires less precision and shape.

cnc machine shop china


We are producer of automated lathe machining. We supplly Automatic Lathe Machining, cnc machining of aluminium, China Medical Machining. If you want to know more, please contact us!

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Improving Production Efficiency Method of Automatic Lathe Machining

Auto Lathe Engineering process two machine equipment, most of the vital parts of the processing technology broke throughout the traditional application concept, and also its particular high speed extraordinary cnc aluminum parts program has broken or cracked through the classic structural design and style.

cnc aluminum parts


 In general, the structural style of the machine application is based on numerous high speed multiple blade exceptional forming application and procedure oriented, satisfy the processing stop of the entire production set, process and production step balance quality and the requirement of precision and stability. cnc machining brass, accuracy and quality, material properties of the technical parameters of the parts, each treatment station of the specific technical requirements of the process is decomposed into technical indicators alone, control system of mechanical structure is relatively simple, stable and reliable. We need to apply high speed machining technology, in the information age, automatic lathe machining, we must have 4 basic knowledge of science and technology: blank manufacturing technology, high speed tool technology, high speed machine tool technology, production skill database.


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Friday, July 12, 2019

General Principle of Precision Machining

PTJ is a CNC processing manufacturer and a manufacturer and supplier of precision mechanical parts. Here we talk about some basic principles of precision machining:
CNC processing manufacturer




processing base level

cnc  machining parts , because the placement of surface should be processed out firstly, so can provide a fine benchmark for the follow-up process as soon as possible. This is known as “the baseline first”

CNC processing manufacturer

The division of digesting stage


 Surface require high quality processing demand, is divided into roughing, semi-finishing and finishing three stages generally. This is mainly  ensure cnc machining  quality, and conducive to the use of equipment. This is easy to set up heat treatment process and facilitate to find out rough defects.

CNC processing manufacturer

mount


 Intended for the box, mount, connecting fishing rod and other parts, you should highly processed plane first of all, then procedure the hole. Not only does this can assure the position finely-detailed of the airplane and pin, but likewise bring comfort for refinement hole over the plane.

CNC processing manufacturer

some. Finish the method. Grinding, Focusing, rolling digesting should be placed in the final stage of the process. Surface smoothness after digesting should above Ra0. 8um, a slight crash will be damaged surface. After finishing process, we must use velvet to get protection, hand or other objects directly contact is usually not allowed completely, this is to avoid damage because of process between transportation and installation.

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Five Process Effects of Precision Machining

Like a China Finely-detailed Machined Parts Supplier, We wish to talk about The procedure effect of accuracy machining.



Five Process Effects


[1] the geometric form and shared position consistency of the parts are approximately micron or angular second level; [2] the limit or characteristic size tolerance with the part is definitely below micron;

[3] the surface roughness of parts (average surface area roughness difference in height) is less than 0. 1 micron;

[4] mutual parts can satisfy the requirements of combining ability;

[5] a few parts may also meet the requirements of correct mechanical or other physical characteristics;

In fact, we offer A number of other items, such as Swiss Lathe Turning Component. Of crouse, For those who have demand about China CNC Milled Elements. We can offer. Looking forward to your contact!


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Thursday, July 4, 2019

for influence of tolerance on cnc machining

Generally speaking,cnc machining drawings will be dimensioned according to the machining method and assembly precision requirements to select the appropriate IT tolerance level. Tolerances means the acceptable range of dimensions and are determined by the engineer according to the shape, fit and function of the part which represents the manufacturing precision requirements of parts and reflects the degree of machining difficulty. So , what is the influence of tolerance on cnc machining?

CNC milling




1 . Material

When tolerance requirements are very tight, it is important to determine which material to use for machining. Aluminum is actually soft when compared to steel and alloy resources, which is not simple to control with respect to tight tolerances. Similarly, synthetic and POM materials are difficult to control tight tolerances compared to metals.

cnn machining


2 . Production technique

Tight tolerances require the production division to constantly debug the equipment and test the production process during the production process. For example , a simple drilling hole must be converted to CNC milling as it was more stringent than regular tolerances.
CNC milling



several. Cost

The more elaborate a product is, the more effort it needs to be spent. Trial and error cost, labor cost and time cost will certainly all increase due to tight tolerance. However , as a professional CNC machining shop, we have no fear of clients' tight tolerance requirements for products. We hope to show our professionalism and quality under such circumstances.
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Teach you how to choose the right material for the CNC processing plant

Determining the best material can affect the functionality and cost of the component. The following are important tips for choosing fabrics from the cnc processing plant.

cnc processing plant


Function

The utilization of parts is among the determining elements. Products employed as overseas equipment need to be protected against corrosion. Parts used for daily rinsing need rust safeguards, such as stainless. Products used by aerospace appliances have wonderful requirements to materials.



Weight&strength

If there is a requirement for fat, Standard metal alloys just like 6061 are excellent low thickness options.

Tensile strength (ts), material solidity and slip on resistance as well regard while the referrals of choosing elements.

cnc processing plant


Price

The feasibility and overall cost of the task are also strongly related to the material. The more elements you use, the greater the cost. For example , special elements and durable materials. Selecting the most appropriate material can impact the function and cost of a component. In previous content, we shared the The most recent? Material? Tendencies for? CNC? Machining in 2019. Follow this advice of consider for choosing the material.



Function

The use of metal parts is one of the determining factors. Products used as offshore equipment should be corrosion resistant. Parts used for daily flushing require rust protection, such as stainless steel. Products used in aerospace machines have different requirements for the purpose of the material.

cnc processing plant


Weight&strength

If there is a requirement for excess weight, Standard light weight aluminum alloys like 6061 are good low denseness options.

Ultimate tensile strength, material firmness and don resistance likewise regard for the reason that the work references of choosing substances.



Price

The feasibility and overall expense of the job are also strongly related to the material. The more resources you use, the higher the cost. For example , special materials and sturdy materials.
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Thursday, June 27, 2019

Exactly how to improve the accuracy of cnc machining?


Now every person has a mobile phone in their hands, but they hardly ever notice the back cover of the smart phone. The back cover is made from high-precision cnc light weight aluminum. The cnc machining accuracy is very high. How to improve the machining accuracy of cnc? Listed below, discuss with you four methods to enhance the precision of cnc processing
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Most of us know that a person of the indications for testing CNC machining is machining precision. Exactly how do we guarantee the precision of cnc machining when we are standardizing? The standard system is the test cutting method. This technique can make certain that the mistake is within the affordable control array, but it is difficult and the manufacturing efficiency is not high. It is generally utilized for single-piece small batch manufacturing. The mass production of cellphone coverings, while preserving high accuracy CNC machining, it is essential to readjust the family member setting of device devices, fixtures, workpieces and also tools to acquire the needed dimension to achieve the function of ensuring batch processing accuracy. Then, in order to make certain the processing accuracy, which processes should be changed ahead of time?
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First, enhance the rotation accuracy of the bearings of CNC equipment tools. When improving the precision of the rotation, high-precision rolling bearings, multi-oil dynamic stress bearings, and also hydrostatic bearings can be chosen. At the exact same time, the precision of the bearing devices is boosted, such as enhancing the machining accuracy of the assistance hole of the box and also the spindle journal, to ensure that the pin turning precision is not reflected on the workpiece.

Second, control the thermal contortion of the process. The cnc machining facility is a high-speed cutting handling equipment. A huge quantity of warmth is created during the handling. The warm generation of the heat source as well as the isolation of the warmth source should be decreased, and also the heat treatment process for removing the inner stress must be included. The dimension of the machining mistake shows the handling accuracy, and also the error is greater. The reduced the machining accuracy, the smaller the error and also the greater the machining precision.

Third, reduce the transmission chain transmission mistake transmission system ought to maintain the variety of transmission components is small, the transmission chain is short, the transmission accuracy is high, the use of speed reduction transmission is an essential means to make certain the transmission accuracy, as well as the closer to the end of the transmission pair, the transmission proportion need to be The smaller sized the end item, the higher the precision of the end item than the other drive components.

4th, reduce the tool wear of CNC machine tools. Before the tool puts on sharply, the device must be re-worn and one of the most special cutting oil ought to be selected for full lubrication. The tool product must fulfill the process needs.

The above are four methods to improve the machining precision of the cnc machining facility, which can greatly improve the accuracy of cnc machining. These are the experiences collected by Xiaobian for many years, and I will share it with you.

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Cnc machining parts surface processing method selection factors to consider


The surface processing method of cncmachined parts depends first on the technical requirements of the machined surface. However, it should be noted that these technical requirements are not necessarily the requirements specified in the parts drawing, and may sometimes be higher than the requirements on the part drawing in some respects due to process reasons. If the benchmarks do not coincide, the processing requirements for the surface of some cnc machined parts are increased. Or because of being a fine benchmark, it is possible to impose higher processing requirements on it.

Once the technical requirements for the surface of each cnc machined part are specified, the final machining method that guarantees this requirement can be selected accordingly, and the machining method that requires several steps and steps is determined. The selected cnc machined parts processing method should meet the requirements of part quality, good processing economy and high production efficiency. To this end, the following factors should be considered when choosing a processing method:

1. Any kind of cnc processing method can obtain a considerable range of processing accuracy and surface roughness, but only in a narrow range is economical, the processing precision of this range is economic processing precision. For this reason, when selecting a processing method, the corresponding processing method that can obtain economic processing precision should be selected.

2. Consider the material properties of the cnc machined parts.
3. Consider the structural shape and size of the cnc machined parts.

4. Consider productivity and economic requirements. When mass production is large, high-efficiency and advanced processes should be adopted. It is even possible to fundamentally change the manufacturing method of the blank, which can reduce the labor of machining.

5. Consider the existing equipment and technical conditions of the cnc processing plant or workshop. When selecting the processing method, you should make full use of the existing equipment, tap the potential of the enterprise, and give full play to the enthusiasm and creativity of the workers. However, consideration should also be given to continually improving existing processing methods and equipment, adopting new technologies and improving process levels.
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Tuesday, June 25, 2019

Cnc processing turning amount how to choose


The specific value of the cutting amount during cnc machining should be determined by simulation method according to the machine tool performance, relevant manual and practical experience. At the same time, the spindle rotation speed, the back-feeding amount and the feed speed can be adapted to each other to form an optimum cutting amount. So how do you choose the amount of turning in the actual application process? What are the principles?
 
cnc turning



(1) When roughing, first consider selecting a large amount of back-feeding knife ap, secondly selecting a larger feed amount f, and finally determining a suitable cutting progress v. Increasing the amount of backing knife ap can reduce the number of passes, and increasing the feed rate f is beneficial to chip breaking. Therefore, it is advantageous to select the roughing amount according to the above principles to improve production efficiency, reduce tool consumption, and reduce Therefore, it is advantageous to select the roughing amount according to the above principles to improve production efficiency cost.
cnc machining

(2) When finishing the car, the cnc machining accuracy and surface roughness are required to be high, and the machining allowance is small and uniform. Therefore, the smaller (but not too small) backing knife amount ap and the feed amount f are selected, and the cutting is selected. High performance tool material and reasonable geometric parameters to maximize cutting speed v.

(3) When arranging coarse and fine turning, pay attention to the range of allowable cutting amount given by the cnc machining center manual. For the CNC lathe with AC frequency conversion speed regulation, the torque of the spindle is reduced at low speed, especially the cutting amount selection at this time.
cnc machining services china

The above three points are the principle that cnc processing is the amount of cutting. As a skilled operator, the cutting amount should be reasonably distributed to ensure the working efficiency of the cnc machining services china.


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How to improve the quality of cnc machining parts


 1. Reasonable cnc machining of machining tools with copper and aluminum parts
The processing of steel and copper knives should be strictly differentiated. The remaining amount of the optical knives should be reasonable, so that the smoothness of the workpiece and the length of use of the knives will be better.

cnc machining


2. Before cnc processing, use the calibration meter to check (check and test) whether the tool is swinging within the allowable tolerance range. The cutter head and the lock nozzle should be blown clean with a wind gun before cleaning, or wiped with a cloth to install the knife. Too dirty is a certain influence on the accuracy and quality of the workpiece.
3. When clamping, pay attention to see if the name and model of the cnc machining workpiece and the program list are the same, whether the material size matches, whether the clamping height is high enough, and the number of calipers is used.
cnc milling

4. The CNC machining program list should be consistent with the reference angle indicated by the mold, and then check whether the upper 3D drawing is correct. Especially for the workpiece that has been transported with water, it is necessary to see the 3D drawing and the workpiece water conveyed. Is it consistent? If there is any unclear, please promptly feedback the programmer or find the fitter master to view the 2D drawings and see if the 2D and 3D reference angles are consistent. To change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.
cnc machining

5. The program list of the CNC machining file should be normalized, including the model number, name, program name, machining content, tool size, feed amount, especially the tool clamp safety length, the reserved margin for each program, and the light knife. It should be clearly stated that the R surface and the plane should be connected smoothly. It should be indicated on the program list. The operation controller should increase the processing by 0.02-0.05MM during processing. If it is a few knives, stop it and see if it is connected. , touch the hand to see if it is up, if not, then lower it.

china cnc machining medical parts
6, before processing, you must understand the contents of the CNC machining program, the program must have 2D or 3D map, and must be marked; X length, Y width, Z height; six sides of data. If there is a flat surface to be marked, the operator can easily detect (check and test) the data after processing, and the tolerance data should be indicated.

7. The machine tool processing speed operation controller should be strictly controlled. The F speed and the S spindle speed should be properly adjusted with each other. When the F speed is fast, the S spindle should be accelerated. The feed speed must be adjusted in different areas.
china cnc machining medical parts

No matter the precision and precision of the cnc machining center, there may be problems with the quality of the machined workpiece. In this case, don't panic. Only find the real reason to make a solution.

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What is the CNC machining of aluminum alloy? What are the advantages and disadvantages?


Many people have heard of CNC lathes and have heard of CNC technology, but they don't know about aluminum alloy CNCmachining. So what is cnc processing?
In fact, aluminum alloy numerical control machining is a method of controlling the movement and processing of machine tools by using digital information. A machine tool that implements machining control using numerical control technology, or a machine tool equipped with a numerical control system, is called a numerical control (NC) machine tool.

Cnc milling




With the continuous advancement of technology, the development of modern cnc processing technology has become high-speed, high-precision, high-reliability, multi-functional, composite, and intelligent. This processing technology has been widely applied to various fields. So what are the advantages and disadvantages of aluminum alloy CNCmachining? I will take you to analyze it together!

cnc milling
First of all, to understand the shortcomings of this processing technology, in fact, the machine tool equipment is expensive, requiring maintenance personnel to have a higher level.
Compared with the shortcomings of aluminum alloy CNC machining, this processing method shows more of its own advantages and also reflects its own value in various industries. Specific advantages:

Mobile parts
1 It can process complex shapes that are difficult to machine by conventional methods, and can even process some unobservable processing parts.
2 The processing quality is stable, the processing precision is high, the repeating precision is high, and it is suitable for the processing requirements of the aircraft.
The production efficiency is high in 3 varieties and small batch production, which can reduce the time of production preparation, machine tool adjustment and process inspection, and reduce the cutting time due to the use of the best cutting amount.
4 A large number of tooling reductions are required, and complicated tooling is not required for machining complex shapes. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.

Electronicparts
Overall, the emergence of aluminum alloy CNC machining has brought great convenience to our lives, and has also improved the production efficiency of various industries.

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How to choose CNC machining tools _ How to solve the collision knife in CNC machining center


The selection of CNC tools and the determination of cutting amount are important contents in the CNC machiningprocess. It not only affects the machining efficiency of CNC machine tools, but also directly affects the processing quality. So how do CNC machining companies choose tools?
 
cnc machining



The tool selection and cutting amount determination of the CNC machining center is completed under the human-computer interaction state, which is in sharp contrast with the ordinary machine tool processing. At the same time, the programmer must also master the basic principles of tool selection and cutting amount determination. Taking full account of the characteristics of CNC machining, the cutting tool and cutting amount can be correctly selected.

The general principle of tool selection is: easy installation and adjustment, good rigidity, durability and high precision. Under the premise of meeting the processing requirements, try to choose a shorter tool holder to improve the rigidity of the tool processing.

cnc machining
Familiar with the importance of the tool for CNC machining, it is inevitable that a knife collision phenomenon will occur during the use. For example, if there is a problem in the origin and coordinate system of the CNC machining center, the knife failure will be caused. How to solve it?
Auto metal parts

At the time of starting up, the machine origin is not set. At this time, the program is run. If you accidentally, the machine will hit the knife because the system does not know the exact position of the machine, and the machine origin is incorrect. Therefore, we must check the setting of the origin of the coordinate system of the CNC machining center before starting the machine.

Electronicparts
For the setting of the workpiece coordinate system, before the machining operation, the zero point setting or the coordinate system setting of the workpiece coordinate system is correct. At this time, the numerical control machining center will not have the problem that the size of the workpiece or the workpiece is not correct.

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Sunday, June 23, 2019

What are the tools used for 5-axis CNC machining?


Among various types of CNC machining, five-axis CNC machining can be said to be a high-tech CNC machining type. In the 1980s and 1990s, five-axis CNC machining was listed as a strategic material. There were extremely strict restrictions on exports and imports. It is conceivable how high the five-axis CNC machining was at that time. Today, five-axis CNC machining still has a strong influence, and it is still irreplaceable in the processing of various high-end technology parts.
Electronicparts


Although there is no clear requirement for the five-axis CNC machining in the selection of the tool magazine, we always choose a better tool magazine when selecting the tool magazine for five-axis CNC machining. This is based on the choice of five-axis CNC machining features. The workpieces processed by the five-axis CNC machining are generally very complicated, and the requirements for precision are extremely high. The selection of the tool magazine and the tool directly affects the machining efficiency of the five-axis CNC machining and the quality of the machined workpiece, so the tool magazine for five-axis CNC machining Choice is a problem that cannot be ignored.

cnc machining


When selecting a tool magazine for five-axis CNC machining, we need to choose a better tool magazine and more sophisticated tools. A good magazine is based on the type and brand of the magazine. For example, a five-axis VMC850 CNC machining, our optional magazine type has a bucket type tool magazine and a knife arm type tool magazine, then we choose to use the knife arm type tool magazine. As for the brand of the tool magazine and the tool, it is a matter of opinion.

cnc machining


Five-axis CNC machining can make large vertical CNC machining, or it can be small vertical CNC machining. However, the two CNC machining magazines only have the choice of bucket type and arm type. Generally, we can't see the five-axis CNC machining. To the bucket magazine, very few people will use the bucket magazine on the five-axis CNC machining. The five-axis high-speed CNC machining tool magazine type is different from ordinary CNC machining. The tool magazine used for high-speed CNC machining is the tool arm type and the same-moving tool magazine. Generally, the same-moving tool magazine is better, and the tool change speed is faster. The same is true for the drill center. In the clip arm magazine and the flying saucer magazine, the clip arm type and the arm type tool magazine are not much different. The flying disc type tool magazine is faster than the clip arm type tool magazine. The general magazine capacity is larger than the clip arm magazine, which can meet the needs of most customers.

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Wednesday, June 19, 2019

How to determine the amount of CNC machining cutting? What are the processing principles?


Correct selection of CNC machining cuttings is a major part of the CNC machining part cutting principle course. Metal machining has three basic principles:

 
cnc machining



1. CNCmachining feed rate
F mainly depends on the surface roughness requirements of the workpiece. When finishing, the surface requirements are high, and the amount of the cutter is small: 0.06-0.12mm/spindle per revolution. When roughing, it can be larger. It is mainly determined by the tool strength, generally 0.3 or more. When the tool main back angle is large, the tool strength is poor, and the feed amount cannot be too large. Also consider the power of the machine, the rigidity of the workpiece and the tool. The NC program uses two types of feeds: mm/min, mm/spindle per revolution, and the units used above are mm/spindle per revolution. If mm/min is used, the formula can be converted: the feed per minute = each Turning tool amount * Spindle revolutions per minute.

cnc machining

2, cutting speed
To select the spindle revolutions per minute, you must first know what the cutting line speed V should take. Selection of V: ​​depends on tool material, workpiece material, processing conditions, etc.
Processing conditions: roughing, V is lower; finishing, V is higher. The rigidity of the machine tool, workpiece, and tool is poor, and V is low. If the S used by the NC program is the number of spindle revolutions per minute, then S:S (spindle revolutions per minute) = V (cutting line speed) * 1000 / (3.1416 * workpiece) should be calculated according to the workpiece diameter and the cutting line speed V Diameter) If the NC program uses a constant line speed, then S can directly use the cutting line speed V (m/min)

cnc machining

3, eating knife depth
For cnc finishing, it is generally possible to take 0.5 (radius value) or less. When roughing, depending on the workpiece, tool, and machine condition, the general small lathe (maximum machining diameter is 400mm or less) is turned on the 45th steel in the normalized state, and the depth of the cutter in the radial direction is generally not more than 5mm. In addition, it should be noted that if the spindle shifting of the lathe is using ordinary variable frequency speed regulation, when the spindle rotates at a very low speed per minute (less than 100-200 rpm), the motor output power will be significantly reduced. Depth and feed can only be achieved very small.cnc machining.

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Selection of blanks for machining parts in CNC machining


CNC machining Before the development of the machining rules for parts, it is necessary to select the types of blanks before the parts are processed and their different manufacturing methods. Since the number of processes, material consumption, and labor consumption of CNC machining parts are largely related to the selection of blanks, the correct selection of blanks has great technical and economic significance.

cnc machining

 The types of commonly used CNC machining parts are: castings, forgings, profiles, welded parts, stampings, etc., and the same kind of blanks may have different manufacturing methods. The choice of blank should take into account the size of the production scale, which largely determines the economics of using a certain blank manufacturing method. If the production scale is large, the high-precision and high-productivity blank manufacturing method can be adopted, which not only saves raw materials but also significantly reduces the amount of machining labor. Moreover, the high precision of the blank can simplify the process and process equipment, and reduce the product. total cost. In fact, the selection of CNC machining blanks should consider the following points:

cnc machining

1. The shape and size of the workpiece structure. For example, blanks with complex shapes and thin walls are generally not castable in metal form; blanks with larger sizes are often not used for die forging, die casting and precision casting. For example, some small parts with special shapes are difficult to machine, and more sophisticated blank manufacturing methods, such as die casting and investment casting, are often used to minimize the amount of machining.

cnc machining
2, the mechanical properties of the parts. The same material uses different blank manufacturing methods, and its mechanical properties tend to be different. For example, a metal cast blank has a higher strength than a sand cast, a centrifugal cast and a pressure cast blank, and its strength is higher than that of a metal cast blank. Forgings with high strength requirements are often used, and ductile iron parts are sometimes used.
cnc machining

3. The possibility and economy should be considered from the existing equipment and technical level of the factory. Consideration should also be given to the possibility of using new processes, new technologies and new materials such as precision casting, precision forging, cold rolling, cold extrusion, powder metallurgy and engineering plastics. With these blank manufacturing methods, the amount of machining can be greatly reduced, and sometimes the numerical control machining can be omitted, and the economic effect is very remarkable.cnc machining.

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Tuesday, June 18, 2019

How does the CNC machining center process parts?


CNC machining is not only used for large-volume parts processing, but also for small-volume parts and high-precision parts. CNC machining is flexible and highly automated. It is especially suitable for machining curves with complex contours, curved parts, and complex boxes with a large number of holes and grooves. The prismatic parts are used in many varieties and small batches. Processing can achieve high economic benefits.
 
cnc machining

 The processing of cnc processing technology is basically the same as ordinary processing, but it has its own characteristics. Therefore, when designing the numerical control machining process of the parts, it is necessary to follow the CNC machining flexibility and high degree of automation. It is especially suitable for processing curves with complex contour shapes, curved parts, and complex boxes with a large number of holes and grooves. In the case of multi-variety and small-volume production, the use of CNC machine tools can achieve high economic benefits.

cnc machining

The cnc machining center determines the tool point and the tool change point. The tool point is the starting point of the tool movement relative to the workpiece during NC machining. Since the program is also executed from this point, the tool point is also called the program start point or the starting point. The choice of the tool point position should be considered first when programming.
cnc machining

When the machining accuracy is not high, some surfaces on the workpiece or on the fixture can be used directly as the tool face. When the machining accuracy is high, the tool point should be selected on the design basis or process reference of the part, such as hole positioning. For the part, it is more appropriate to take the axis of the hole as the tool point.
cnc machining

The tool point must have a certain coordinate relationship with the positioning reference of the workpiece to determine the relationship between the machine target and the workpiece coordinate system. The choice of the tool point should facilitate the calculation of the coordinate values ​​and make the tooling convenient.

cnc machining
When the tool is set, the tool point should be coincident with the tool point. The so-called knife position, for the flat end mill refers to the intersection of the tool axis and the tool bottom; for the ball end milling cutter is the ball center of the ball head; for the turning tool is the tool tip; for the drill bit is the drill tip; The wire electrode cutting machine tool refers to the focus of the wire electrode axis and the part surface.

cnc machining
Pingtejing CNC machining center reminds everyone that when changing the tool during the machining process, the tool change point should be specified. The position of the tool change point should be based on the principle of not hurting the workpiece, fixture and machine tool during tool change. set up. Do not blindly change the props, which may cause damage to the equipment.


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Monday, June 17, 2019

CNC machining accuracy is not allowed? Have you learned about these methods?


CNC machining is a processing method for precision parts processing. Therefore, the requirements for CNC machining products are extremely high. Products with low precision are also required to be rebuilt or directly scrapped. For CNC machining manufacturers, it is very scary. Xiaobian told everyone about the reasons and solutions for the inaccuracy of CNC machining.

cnc machining parts


1. The workpiece size is accurate and the surface finish is poor.
The cause of the failure: the tool tip is damaged, not sharp; the machine tool generates resonance, the placement is not stable; the machine tool has crawling phenomenon; the processing technology is not good.
Solution: If the tool is not sharp after being worn or damaged, re-grind the knife or choose a better tool to re-align the tool; the machine will generate resonance or place it is not stable, adjust the level, lay the foundation, and fix it smoothly; the reason for the mechanical creep is drag The guide rail of the plate is very worn, the screw of the lead screw is worn or loose, and the machine should pay attention to maintenance. After the work, the wire should be cleaned and the lubricant should be added in time to reduce the friction. The coolant suitable for the workpiece processing can be selected to meet the processing requirements of other processes. In the case, try to use a higher spindle speed.
cnc machining parts

2. The workpiece produces a taper size
The cause of the fault: the level of the machine tool is not adjusted well, one high and one low, the placement is not stable; when turning the long axis, the contribution material is relatively hard, the tool eats the knife deeper, causing the knife phenomenon; the tailstock thimble is not concentric with the main shaft.
Solution: Use the level to adjust the level of the machine, lay a solid foundation, fix the machine to improve its toughness; choose a reasonable process and appropriate cutting feed to avoid the tool force to make the knife; adjust the tailstock.

cnc machining parts
4. The processing arc effect is not ideal, the size is not in place
The cause of the fault: the overlap of the vibration frequency causes resonance; the processing technology; the parameter setting is unreasonable, the feed speed is too large, the arc machining is out of step; the looseness caused by the screw gap is large or the screw is too tight; abrasion.
Solution: Find the part that produces resonance, change its frequency, avoid resonance; consider the processing technology of the workpiece material, and make the program reasonably; for stepper motor, the processing rate F can't be set too large; whether the machine is installed firmly, placed smoothly, drag Whether the board is too tight after wear, the gap is increased or the tool holder is loose; etc.; replace the timing belt.

cnc machining parts
5. There is a change in the processing of one part of the workpiece, and the dimensions of other processes are accurate.
Fault reason: Whether the parameters of the program block program are reasonable, whether it is within the predetermined track, and whether the programming format meets the requirements of the manual.
Solution: If there is a chaotic tooth in the thread block, if the pitch is wrong, it immediately associates with the peripheral configuration (encoder) of the cnc machining thread and the objective factor of the function.

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PTJ Hardware cnc machining factory
Sifangyuan Industrial Park, Xinshapu, Huaide Community
Humen town, Dongguan City, Guangdong Province
Phone: +86 0769 82886112
Email: sales@pintejin.com