Machinery industry – Page 4 – CNC Machining & Turning, Milling, Metal parts

Introduction of computer gong finishing

The feed route of finishing machining is basically carried out along the contour of the parts. Therefore, the key point of determining the feed route is to determine the feed route of rough machining and empty stroke. In the CNC lathe processing, the determination of the processing route should generally follow the following principles.

① It should be able to ensure the accuracy and surface roughness of the workpiece to be processed.

② The processing route is shortest, the idle travel time is reduced, and the processing efficiency is improved.

③ The workload of numerical calculation should be simplified as much as possible.

④ For some repeated programs, subroutines should be used.

Advantages and disadvantages of CNC CNC CNC machining has the following advantages:

① The number of tooling is greatly reduced, and complex tooling is not needed to process complex parts. If we want to change the shape and size of the parts, we only need to modify the processing program of the parts, which is suitable for the development and modification of new products.

② The machining quality is stable, the machining accuracy is high, and the repetition accuracy is high, which can meet the machining requirements of aircraft.

③ In the case of multi variety and small batch production, the production efficiency is high, which can reduce the time of production preparation, machine adjustment and process inspection, and reduce the cutting time due to the use of the best cutting quantity.

④ It can process complex surface which is difficult to be processed by conventional methods, and even process some parts which cannot be observed.

Application of coordinate measuring instrument

It is widely used in mechanical manufacturing, electronics, automotive and aerospace industries. It can detect the size, shape and mutual position of parts and components, such as box, guide rail, turbine and blade, cylinder block, cam, gear shape and other space surface measurement. In addition, it can also be used for scribing, centering hole, photolithography integrated circuit, etc., and can scan continuous curved surface and prepare machining program of CNC machine tool. Because of its versatility, wide measurement range, high precision, high efficiency, good performance, and can be connected with flexible manufacturing system, it has become a kind of large precision instrument.

With the development of CMM market, CMM, as a modern large-scale precision instrument, has shown its importance and broad development prospects. It can measure the three-dimensional dimension of space conveniently and realize on-line detection and automatic measurement.

Its advantages are as follows:

It has strong versatility, can realize the measurement of spatial coordinates, and can easily measure the three-dimensional outline size and position accuracy of various parts;
The measurement is accurate and reliable
It is convenient for data processing and program control. Therefore, it can be incorporated into automatic production and flexible processing line, and become an important part. At present, CMM is developing rapidly at home and abroad. Famous foreign manufacturers include Zeiss and Leitz of Germany, DEA of Italy, Brown & Sharpe of America, Mitutoyo of Japan, etc. With the development of various industries, the development of coordinate measuring instruments will also be rapid.

The highest precision of computer gong processing

Machining center in the process of processing mold, the accuracy and surface processing quality requirements are higher and higher, in order to ensure the quality of mold processing, we should consider the selection of machine tool, tool handle, tool, processing scheme, program generation, operator requirements and other aspects.

With the improvement of product design requirements and the development of high-speed and high-precision processing technology, the selection of high-precision and high-speed machining center has greatly improved the quality and speed of mold NC processing, reduced the processing procedures, shortened the production cycle and clamping times of mold, and sometimes eliminated the time-consuming fitter repair work. The high-speed and high-precision machining of mold has gradually become one of the important contents of the technological transformation of mold production enterprises. It is inevitable that the high-speed CNC machining center will replace the traditional low-speed machining, and the development of mold manufacturing technology will also bring us more rich product experience.
The use of high-speed and high-precision machining center with suitable tool handle structure will also drive the update of relevant process equipment. In particular, the influence of cutting tools on NC machining quality and toolholder will become prominent. In the rotary tool processing system, the chuck is closely connected with the machine tool (or its combination) to ensure the realization of tool processing performance. Generally, there are HSK hollow toolholder and BT toolholder in the interface between machine tool and toolholder. The taper of taper shank interface between machine tool spindle and BT toolholder is 24:7, which is suitable for traditional low-speed machining. Because BT toolholder and machine tool spindle are only taper fit, the clearance of taper fit will increase under the action of high-speed centrifugal force, which affects the quality of NC machining. Generally, when the spindle speed exceeds 16000 rpm, we will need to use HSK hollow handle. The positioning structure of HSK arbor is over positioning, which provides a standard connection with the machine tool. Under the pulling force of the machine tool, the short cone and end face of the arbor are closely matched with the machine tool.
Choosing the right cutting tools, the reasonable use and selection of cutting tools will be an important factor affecting the quality of NC machining. Cemented carbide tools are more and more widely used. In high speed machining, coated cemented carbide will replace most of the front steel tools, including reamer, ball head tool, boring tool and other simple tools. Coated cemented carbide will play an important role in high speed machining tool materials and be applied to most of the conventional processing fields. Generally, we know that in rough machining, we will use large diameter tools for processing. In order to save cost and reduce the difficulty of tool manufacturing, we will use machine clip cemented carbide blade In the semi finish machining, the insert tool with high speed and high feed is used to make the semi finish machining move faster; in the finish machining, the high-precision round head mirror blade is used to ensure the strength of the tool and the tool holder, which can save the expensive cost of selecting the whole alloy tool while maintaining the machining accuracy. In the process of machining, we also need to pay attention to the inner contour fillet radius of the finishing parts must be greater than or equal to the radius of the tool, select the tool whose radius is less than the radius of the corner fillet to process in the way of arc interpolation or diagonal interpolation, so as to avoid the phenomenon of overcutting caused by linear interpolation and ensure the quality of mold finishing.
The importance of NC process design in high-speed and high-precision machining is raised to a higher position. The whole process of machining must be controlled. Any error will have a serious impact on the mold quality, so the process design will play a decisive role in the machining quality. NC machining process design can be considered as the state control of a system process plan from the part blank to the part forming. A good process plan is difficult in the whole design process, which can be obtained only after continuous practice summary and modification. A large amount of information should be considered in the design process, and the relationship between the information is extremely complex, which must be guaranteed by the actual work experience of the programmer. Therefore, the design quality of process plan mainly depends on the experience and level of technical personnel.

Generally, a complete NC machining process planning includes the following contents:

1) CNC machine tool selection.

2) Processing method selection.

3) Determine the clamping mode of the part and select the fixture.

4) Positioning method.

5) Inspection requirements and methods.

6) Select the tool.

7) Error control and tolerance control in machining.

8) Define NC process.

9) Numerical control process sequencing.

10) Cutting parameter selection.

11) Work out NC process program sheet.

CAM software a good software can also improve the quality and efficiency of mold processing, such as Unigraphics and cimiamtron , are very good mold processing software, especially the two kinds of software rich practical different processing strategy, in NC milling programming, turning programming, WEDM programming are widely used, complement each other, so that the quality and efficiency of NC machining has been greatly improved. Cimiamtron can add the screw function when clearing the offset area in rough machining, which will make the actual cutting more stable, eliminate the mutation of feed direction between adjacent tool paths, reduce the acceleration and deceleration of cutting feed, maintain a more stable cutting load, prolong the tool life, and also play a good role in protecting the machine tool. Software is just a tool. An excellent programmer has rich experience and theoretical knowledge of on-site machining. At the same time, the NC programmer who is proficient in the software function is the decisive factor in the mold NC machining, which plays a key role in the quality and efficiency of NC machining.
The operator of machining center is the executor of NC machining, and their control of NC machining quality is also very obvious. In the process of performing processing tasks, they know the real-time status of machine tools, toolholders, cutting tools, processing technology, software and cutting parameters best, and their operations have the most direct impact on NC machining, so the skills and sense of responsibility of machining center operators are also the key factors to improve the quality of NC machining!

High precision parts manufacturing

The concept, significance and characteristics of high precision parts manufacturing high precision parts manufacturing takes high precision mechanical parts as processing objects. Based on the systematic and integrated theory and technology, according to the structure and requirements of the workpiece, the organic combination and optimization of feeding, processing, detection and handling are realized, and the production of parts is completed under the precise processing conditions.
Application field of high precision parts and components high precision parts and components are used in all walks of life testing equipment – scientific instruments. In China, they are mainly used in the instrument and instrument industry of scientific instruments.
High precision machining has the advantages of high precision, low energy consumption, flexible production and high efficiency. Reducing the size of the whole manufacturing system and precision parts can not only save energy, but also save manufacturing space and resources, which is in line with the production mode of energy saving and environmental protection. It is one of the development directions of green manufacturing.
Compared with ordinary machinery manufacturing, precision machinery manufacturing has high technology content (design and production), excellent processing equipment, high added value, and small batch sales.
Analysis of foreign development situation high precision machinery manufacturing technology is known as one of the key technologies in the 20th century. It is the key development direction in the 21st century and has been highly valued by all countries in the world. Japan, the European Union, South Korea, the United States and other developed countries have invested a lot of human, material and financial resources to develop their own high-precision mechanical parts research and development and technology.
China’s high-precision machinery manufacturing technology was gradually developed in the late 1980s and early 1990s. It is a rapidly developing industry in China today. High precision machinery manufacturing products are widely used in national defense, medical, aerospace, electronics and other military and civil fields.

Difference between machining center and NC milling machine

CNC milling machine is the abbreviation of digital control machine tool, is a kind of automatic machine tool with program control system. The control system can logically process the program with control code or other symbolic instructions, decode it, express it with coded numbers, and input it into the numerical control device through the information carrier. After calculation and processing, the numerical control device sends out various control signals to control the action of the machine tool, and automatically processes the parts according to the shape and size required by the drawing.

Similarities and differences between machining center and CNC milling machine:

The same as CNC milling machine, machining center is also composed of CNC system, servo system, mechanical body, hydraulic system and other parts.

But machining center is not the same as NC milling machine. The biggest difference between machining center and NC milling machine is that machining center has the function of automatic tool exchange. By installing different tools in the tool magazine, they can pass through in one clamping. In addition, the machining range of the two is different. The functions of machining center include milling workpiece, drilling workpiece, setting space, etc The machine can only mill the workpiece. The automatic tool changing device for Dongguan high-speed computer gong processing changes the processing tools on the spindle to realize various processing functions, such as drilling, boring, reaming, tapping, grooving, etc.

The spindle component of drilling and tapping center is mainly composed of spindle, bearing, spindle quasi stop installation, automatic clamping and chip removal device, which is an important part of the mechanical part of drilling and tapping center. The lubrication, cooling and sealing of the spindle components of drilling and tapping center are several problems worthy of attention in the process of machine tool use and maintenance. So, how to maintain the spindle of drilling and tapping center?

First, good lubrication effect can reduce the working temperature and prolong the service life of the bearing; therefore, attention should be paid in operation and use: grease and oil circulation lubrication is adopted at low speed; oil mist and oil air lubrication are adopted at high speed. However, when grease lubrication is used, the sealing volume of the spindle bearing is usually 10% of the bearing space volume. Do not fill it up at will. Too much grease will aggravate the spindle heating. For oil circulation lubrication, check the constant temperature oil tank of spindle lubrication every day to see whether the oil quantity is sufficient. If the oil quantity is not enough, add lubricating oil in time. At the same time, pay attention to check whether the temperature range of lubricating oil is appropriate.

In order to ensure that the spindle has good lubrication, reduce friction and heat, and take away the heat of the spindle assembly, the circulating lubrication system is usually used. The hydraulic pump is used to supply oil for lubrication, and the oil temperature controller is used to control the oil temperature of the oil tank. The spindle bearing of drilling and tapping center manufacturer adopts advanced grease sealing method for lubrication, and each grease addition can be used for 7-10 years. The new lubrication cooling method not only reduces the bearing temperature rise, but also reduces the temperature difference between the inner and outer rings of the bearing, so as to ensure the small thermal deformation of the spindle. There are two common lubrication methods for spindle. Oil air lubrication is similar to oil mist lubrication, but oil mist lubrication is to continuously supply oil mist, and oil air lubrication is to send oil mist into the bearing gap at a fixed time and quantity, which not only realizes oil mist lubrication, but also avoids the air pollution caused by too much oil mist. In order to achieve the purpose of lubrication and cooling, a large flow of constant temperature oil (3-4l / min for each bearing) is injected into the spindle bearing. Here, the oil injected with larger flow rate must be forced to drain by the drain pump instead of natural reflux. At the same time, the common large capacity and high-precision constant temperature oil tank should be used, and the oil temperature change should be controlled within ± 0.5 ℃.

Second, the cooling of the spindle components is mainly to reduce the bearing heat, invalid control of heat source.

Third, the sealing of spindle components should not only prevent dust, chips and cutting fluid from entering the spindle components, but also prevent the leakage of lubricating oil. There are non-contact seal and contact seal for spindle components. For the non-contact seal, in order to prevent leakage, it is important to ensure that the return oil can be drained as soon as possible and the oil return hole is unobstructed; for the contact seal with felt ring and oil resistant rubber seal ring, pay attention to check its aging and damage. To sum up, in the process of using and maintaining the drilling and tapping center, we must pay great attention to the lubrication, cooling and sealing of the spindle components, and do this work carefully.

Cutting tools for computer gong processing

Roughening: under the maximum load of the machine tool, in most cases of processing, select the largest possible tool, the largest possible feed amount and the fastest possible feed. In the case of the same tool, the feed is inversely proportional to the feed amount. In general, the load of the machine tool is not a problem. The principle of tool selection mainly depends on whether the two-dimensional angle and three-dimensional arc of the product are too small The principle is that the length of the tool is greater than the depth of processing. For large workpieces, it is necessary to consider whether the collet can be lowered. Otherwise, it is necessary to go as follows. 0 I4 Q6 x1 f5 l N& u

The purpose of light knife: to meet the workpiece processing requirements: finish, flying die allowance, copper male spark position, etc., at the same time, as large as possible, as fast as possible, because the precision knife takes a long time, with the most appropriate feed and feed, in the same feed, the larger the transverse feed, the faster. The surface feed is related to the finish after processing, and the feed size is related to the surface shape In the case of no damage to the surface, the minimum allowance should be left, the maximum knife should be used, the fastest Belt should be rotated, and the proper feeding should be carried out.

Clamping method:

All clamps are long horizontally and short vertically;
Vise clamping: the clamping height should not be less than 10 mm. When processing the workpiece, the clamping height and processing height must be specified. The processing height should be about 5 mm higher than the vise plane, so as to ensure the firmness and not damage the vise. This kind of clamping belongs to general clamping, and the clamping height is also related to the size of the workpiece. The larger the workpiece is, the higher the clamping height will be;
Splint clamping: the splint is fixed on the worktable with the code, and the workpiece is locked on the splint with the screw. This kind of clamping is suitable for the workpiece with insufficient clamping height and large processing force, generally medium and large workpieces, and the effect is very good. 1 ` Q( F9 k, n
When the workpiece is large, the clamping height is not enough, and it is not allowed to lock the thread at the bottom, it should be clamped with code iron. This kind of clamping needs to be clamped twice

a. First code the four corners, process the other parts, and then code the four sides and process the four corners. The principle is that during the second clamping, be very careful not to let the workpiece loose, code before loosening,

b. There are also two sides of the first code, the other two sides of the processing, 8 L # y% @ # e’n% p

Code iron has an advantage, large contact area, not easy to deformation, such as aluminum, magnesium within the soft metal must use code iron to prevent deformation;

Tool clamping: diameter more than 10 mm, not less than 30 mm; diameter less than 10 mm, not less than 20 mm,

Note: the impact of the tool on the workpiece can cause: a. the workpiece moves; B. the tool is broken; C. the tool is deformed and the workpiece is damaged; D. the tool is loose, the tool is dropped or the workpiece is not processed correctly

Therefore, the clamping of tool and workpiece should be firm. Strictly prevent Tool Collision and direct insertion of workpiece, & H #: X # {3 W

Classification of cutting tools and their application scope:% Q + e’c. B-Z

By material:

White steel knife: easy to wear, used for roughening of copper and small steel

Tungsten steel knife: used for angle cleaning (especially steel material) and light knife. . g4 k+ L1 U0 h/ s3 P+ T

Alloy knife: similar to tungsten steel knife

Purple knife; used for high speed cutting, not easy to wear

According to the cutter head:, ~. A “{2 s; t

Flat bottom knife: used for plane and straight body side cleaning (plane angle / m3 Z / M)_ , Z

Ball cutter: used for all kinds of surface medium light, light knife) F + I-m: B0 F8 G-V) H

Ox nose knife (one side, two sides and five sides): used for roughening steel (r0.8, r0.3, r0.5, r0.4) – X / F9 x, H: v

Rough leather knife: used to cut rough, pay attention to the remaining method (0.3)

According to the arbor: straight knife: straight knife is suitable for all kinds of occasions 9 a # x E + x0 a% E

Slant bar cutter: but not suitable for straight face and face with inclination less than the inclination of bar (S2 [7 d & D% O6 M0~

Computer gong processing workpiece collision number

After the workpiece is placed on the pad iron, it is necessary to pull the table for the workpiece datum according to the drawing requirements. For the workpiece that has been ground on six sides, it is necessary to check whether its verticality is qualified.

The nut must be tightened after the work-piece is pulled to prevent the work-piece from shifting during the processing due to the loose clamping; pull the work-piece again to ensure that the error does not exceed the tolerance after the clamping.

Number of workpieces touched

For the clamped workpiece, the contact head can be used to set the processing reference zero position. The contact head can be used in photoelectric type and mechanical type. There are two kinds of methods: middle collision number and unilateral collision number

Photoelectric static, mechanical speed 450 ~ 600rpm. Manually move the x-axis of the worktable according to the collision number to make the collision number head touch one side of the workpiece. When the collision number head just touches the workpiece and the red light is on, set the relative coordinate value of this point to zero. Then manually move the x-axis of the worktable to make the collision number head touch the other side of the workpiece. When the collision number head just touches the workpiece, record the relative coordinate at this time.

According to the relative value minus the diameter of the collision head (i.e. the length of the workpiece), check whether the length of the workpiece meets the requirements of the drawing.

CNC machining center milling cutter

CNC machining center used on the milling cutter, should choose all cemented carbide, general milling machine used on the selection of white steel material. The hardness of white steel milling cutter is softer than that of cemented carbide milling cutter. Cemented carbide milling cutter has good thermal hardness, wear resistance, but poor impact resistance. The carbide is made by powder metallurgy. Its hardness can reach about 90hra and its thermal property can reach about 900-1000 degrees.

Number of milling cutter teeth

When selecting a milling cutter, the number of teeth should be considered. For example, the coarse tooth milling cutter with a diameter of 100 mm only needs 6 teeth, while the dense tooth milling cutter with a diameter of 100 mm can have 8 teeth. The size of pitch will determine the number of cutter teeth to be cut together in milling, which affects the smoothness of cutting and the requirement of cutting rate.

Chip holding tank

Coarse tooth milling cutter is mostly used for rough machining, because it has a large chip holding groove. Assuming that the chip holding groove is not large enough, it will make it difficult to roll the chip or the conflict between the chip and the tool body or workpiece aggravate. At the same feed rate, the cutting load of coarse tooth milling cutter is larger than that of dense tooth milling cutter.

Cutting depth

In finish milling, the cutting depth is shallow, generally 0.25-0.64mm. The cutting load of each tooth is small (about 0.05-0.15mm), and the power required is small. It is able to select dense tooth milling cutter, and it is able to select larger feed rate.

Application of rough milling

In heavy load rough milling, excessive cutting force can make the machine tool with poor rigidity vibrate. This kind of chatter will lead to the edge collapse of cemented carbide blade, and then shorten the tool life. Selecting coarse tooth milling cutter can reduce the requirement of machine power.

CNC machining center workpiece processing process is no longer like the traditional processing equipment, the need for uninterrupted control of the machine tool to end, control the function parts of the machine tool for messy and precise action, and then high-precision, efficient end of the processing process. The programming of workpiece processing is the key of workpiece processing in machining center. However, if the programming is not reasonable or the parameters are not set properly, the machining accuracy and power of the workpiece will be seriously affected, such as overcutting. Overcutting is a serious problem in workpiece processing, which can lead to the invalidation of workpiece. For some reason, the front-line processing personnel have worked out the processing program which is sure to be overcut. If the system can announce the alarm signal in advance in the working process, the overcut can be avoided.

Mold maintenance mode

Management of mold field use

Dispatchers should go through relevant procedures according to the corresponding management system when collecting and returning the molds, and be responsible for the whole process of the molds from receiving to returning.
The die should be processed according to the stamping process and the corresponding tonnage of punch press. The mold should be adjusted and installed by the mold adjuster, and ensure that the leakage is smooth, the spring top is normal, the feeding is convenient, the stroke is reasonable, and the production can be started after the qualified sample is tested.
The punch operator shall strictly follow the operation procedures. If any abnormal phenomenon is found in the production process, it should be reported in time, and the production can be carried out after troubleshooting. In case of mold damage caused by barbaric operation, the responsible person shall fill in the mold accident liability sheet and give certain punishment.
In case of die waste fracture, guide plate guide deformation, die and punch damage caused by pressing and bending die stuffy, it is necessary to trace the responsibility of the adjuster.
The usage of the mould shall be clear during the shift handover of day shift and night shift. The successor shall be responsible for the accident after the handover.
After the completion of the production task, the dispatcher shall be informed in time to handle the warehouse return procedures. The production site should not keep the mold without production instructions or complete the batch task. If the mould is lost, the responsibility of the final receiver will be traced.

Purpose of mold maintenance system

Master the history of the mold 2. Maintain the mold in time after mold production 3. Improve the service life of the mold 4. Ensure the quality of the mold and smooth production

Mold maintenance mode mold maintenance is divided into four modes

Preventive inspection: take every 15 days as a cycle to check the mold status directly on the production machine, and record the results in the “mold preventive inspection record form”. This part of the inspection is in the charge of the mold group, assisted by the injection molding department.
General maintenance (A-level maintenance): it refers to the general maintenance items of the mold during the daily mold test and trial production, which are responsible and recorded by the production department.
Regular quantitative maintenance (B-level maintenance): when the mold has not been used for more than one year or has accumulated more than 50000 beer each time, detailed inspection shall be carried out, and the inspection results shall be recorded in the “mold maintenance inspection record form”. The production department is responsible for and records.
Mold maintenance (C-level maintenance): when the injection molding material has serious appearance problems or the mold is damaged, the parts need to be replaced or repaired.

The motor does not run;

Switching power supply (± 15V) transformer TL and power switch tube v69 are abnormally hot.

This is a typical case of syndrome, and there may be some causal relationship between the faults, so we need to deal with the faults in sequence, otherwise we may get twice the result with half the effort, or even cause the fault area to expand. Through the analysis, we make the following maintenance order: switching power supply one > under voltage light > motor running. Firstly, check the power supply board. After measuring the 150V DC voltage of the main circuit and disconnecting the ± 15V load, we know that the fault is inside the switching power supply board. In the check of the power supply board, we find that the voltage of the 10V regulator V32 is only 9.5v. From this, we can find the cause of the fault: the current limiting resistance rl85 of V32 becomes larger. After replacing rl85, the ± 15V power board and “under voltage” lamp returned to normal, but the motor still did not run. It can be seen that the above flashing lights and hot components are caused by rl85 variation, and there is another reason for the motor not running. According to the usual inspection method, it can be detected step by step, but due to experience, we only did a simple transformation and steering test, and found that the reverse operation was normal, so we quickly found out the cause of the fault: the integrated block N5 (tl084) of the commutation circuit failed, and everything was normal after replacing N5

PC interface method

Because the signal transmission and control between each unit (except driver) of NC machine tool and NC system are realized through PC interface (1 / O), many faults will be reflected through PC interface signal. We can diagnose various complex machine tool faults or judge whether the fault is in NC system or in machine tool electrical by consulting 1 / O signal of PC machine tool side. The method is very simple, that is, it is required to be familiar with the current state and normal state of all PC (machine side) interface signals (or make a table). During diagnosis, check and compare the current state and normal state of all PC (machine side) interface signals one by one to find out the faulty interface signals, and then find out the fault causes according to the external logic relationship of the signals. When you are familiar with the PC interface signal, the application of this PC interface comparison method is very simple and fast, and avoids the complicated ladder program.

Recovery of abnormal data in Siemens 3GG system

The grinder s45-6 of Switzerland is equipped with Siemens 3GG system, which is a dual n C dual PLC structure. The system has a strong self diagnosis function. When a fault occurs, it can quickly diagnose and repair the fault with the help of the screen prompt. However, if the system cannot be started, and the PLC is in the stop state, the screen is not bright, then the self diagnosis function of the system will not play a role, leading to the difficulty of diagnosis. If the battery voltage is lower than 2.7V, the battery must be replaced; if the NC or PLC hardware is damaged, the circuit board needs to be replaced; if the 24 V power supply of the machine tool is lower than 21 V, the power supply circuit and load need to be checked.

But we encounter more faults, the reason is not the hardware fault, but the machine data abnormal such as soft fault. The reasons are complex, such as power grid interference, electromagnetic wave interference, battery failure, operation error and so on, which may cause the loss or confusion of machine data, so that the system can not start.

Key points of complex parts processing

The continuous fine blanking die for complex parts is the frontier basic technology of fine blanking technology. Taking this as the leader, the research is expected to promote the whole fine blanking technology in our country. Taking the synchronizer ring, clutch plate, longitudinal compound continuous fine blanking process and die for complex parts as the breakthrough point, the key technology of fine blanking die design and manufacturing is studied, and the development of fine blanking die technology in our country is realized The gap between China and advanced countries should be shortened as soon as possible.

Study on the life promotion of fine blanking die and its related key technologies

Die life is a comprehensive reflection of die material, small process and supporting product level. Taking the life of fine blanking die as the leader to carry out technical research can not only solve the problem that the life of fine blanking die is too low, but also drive the technical development of die material, fine blanking process, supporting tooling and other auxiliary products.

Research and development of fine blanking precision forging composite technology

Precision blanking and precision forging are two advanced manufacturing technologies developed in parallel. If the precision blanking parts are too thick and need precision forging, the precision forging must be too thin. They are closely related. The basic idea of developing precision forging and fine blanking compound process is to find the combination point of the two processes (such as gear parts with wheel hub and cam parts with short shaft). The precision forging in China has a long history and has a high level, so it is a good way to improve the overall level of precision blanking technology in China.