China Shenzhen Perfect Precision Product Co., Ltd. company news

What is the definition of precision parts processing? We have such a definition of Dalian precision parts processing. How to understand precision parts processing? How to define precision parts processing? What is the definition of precision parts processing? The manufacturer of precision parts and components believes that the definition of precision parts and components processing is the process of finishing the final processing of each main surface according to steps and procedures, including workpiece parallelism, surface finish, surface perpendicularity, surface hardness, etc., so that the processing accuracy and processing surface quality of parts meet the requirements of the drawings. 1. Other requirements. For example, finish. It is required to achieve, such as mirror effect. 2. Parallelism requirements. The so-called parallelism requirement is the requirement for the tolerance around the workpiece. For example, for a rectangular workpiece, the thickness of the four corners of the workpiece is required to reach a certain tolerance range. If the thickness of the four sides cannot meet the tolerance requirements, the parallelism requirements cannot be met. This requires readjusting the workpiece. The problem may occur in the grinding machine suction cup, which is worn due to excessive use, resulting in parallelism error; It may also be that the grinding wheel is not properly trimmed, or the grinding wheel is cracked or chipped, and the grinding wheel needs to be grinded again; Or it may be that the suction cups are not cleaned up, so it is necessary to clean the suction cups again and carefully; It may also be that the workpiece is not well trimmed and has burrs. 3. Verticality requirements. The so-called perpendicularity requirement is to require that the side and ground of the workpiece meet the tolerance requirements. What is best understood is the proper body, which is divided into three sides of XYZ from the perspective of the number axis. Generally, XZ and YZ are required to meet the tolerance requirements. Errors also occur and the parallelism requirements are approximate. Generally, it can be handled according to the requirements of parallelism.

When turning threads on a CNC machine tool, the z-direction feed along the pitch direction should maintain a strict speed ratio relationship with the rotation of the machine tool spindle, so cutting should be avoided during the acceleration or deceleration of the feed mechanism. For this reason, there should be a lead in distance δ 1 Overrun distance δ 2。 The values of and are related to the dynamic characteristics of the machine tool drag system, the thread pitch and the thread accuracy. Generally, it is 2-5mm. For large pitch and high-precision threads, the maximum value shall be taken; Generally, it takes about 1/4. Many manufacturers and operators of Dalian NC machining have not realized the importance of brands when purchasing NC machining centers. They believe that as long as they can rotate, it doesn't matter what brands are. But in fact, the good or bad brand of CNC machining centers directly affects the quality of production. It can be said that the brand of CNC machining centers is directly related to the development of enterprises. Therefore, we must recognize the brand when selecting CNC machining centers. Nowadays, the application of CNC machine tools has been popularized to a certain extent, and the high-performance and efficient machining center has gradually become a social need. Therefore, more and more schools purchase CNC machine tools and carry out teaching of CNC machine tools. Programming is an important part of NC machining, and improving the programming skills of machining centers can largely avoid some unnecessary collisions. In the 21st century, with the rapid promotion of China's inductive economic strength, the processing center stores have entered a rapid development period. The demand for intermediate processing in automobile and its parts, aerospace, mold and other industries has increased significantly. The domestic processing centers select the best domestic and foreign CNC systems, functional components and other accessories to speed up the pace of industrial production. The quality and reliability have improved significantly, with advantages in cost performance, and have gradually been recognized by domestic users.

When turning threads on a CNC machine tool, the z-direction feed along the pitch direction should maintain a strict speed ratio relationship with the rotation of the machine tool spindle, so cutting should be avoided during the acceleration or deceleration of the feed mechanism. For this reason, there should be a lead in distance δ 1 Overrun distance δ 2。 The values of and are related to the dynamic characteristics of the machine tool drag system, the thread pitch and the thread accuracy. Generally, it is 2-5mm. For large pitch and high-precision threads, the maximum value shall be taken; Generally, it takes about 1/4. Many manufacturers and operators of Dalian NC machining have not realized the importance of brands when purchasing NC machining centers. They believe that as long as they can rotate, it doesn't matter what brands are. But in fact, the good or bad brand of CNC machining centers directly affects the quality of production. It can be said that the brand of CNC machining centers is directly related to the development of enterprises. Therefore, we must recognize the brand when selecting CNC machining centers. Nowadays, the application of CNC machine tools has been popularized to a certain extent, and the high-performance and efficient machining center has gradually become a social need. Therefore, more and more schools purchase CNC machine tools and carry out teaching of CNC machine tools. Programming is an important part of NC machining, and improving the programming skills of machining centers can largely avoid some unnecessary collisions. In the 21st century, with the rapid promotion of China's inductive economic strength, the processing center stores have entered a rapid development period. The demand for intermediate processing in automobile and its parts, aerospace, mold and other industries has increased significantly. The domestic processing centers select the best domestic and foreign CNC systems, functional components and other accessories to speed up the pace of industrial production. The quality and reliability have improved significantly, with advantages in cost performance, and have gradually been recognized by domestic users.

For precision parts, the processing is very strict, and the processing procedures include knife feeding, knife discharging, etc. Dalian precision parts processing has specific requirements for size and precision, such as 1mm plus or minus micrometers. If the size is too much wrong, it will become a waste product. At this time, it is equivalent to having to re process, time-consuming and laborious. Sometimes, the entire processing material will be scrapped, which leads to increased costs. At the same time, the parts are definitely useless. In the past, China's precision machining production enterprises were relatively backward in technology compared with foreign countries. They generally lacked independent innovation ability and support of key and core technologies. The products they machined were mainly low-end products, lacking competitiveness in the world. There was a significant gap between China's precision machining machine tools and foreign advanced products in terms of quality stability, reliability and durability. Cold working refers to working at room temperature without causing chemical and physical changes to the workpiece. The processing above or below the normal temperature will cause the chemical or physical changes of the workpiece, which is called hot processing. Cold processing can be divided into cutting processing and pressure processing according to the difference of processing methods. This type of processing requires high equipment for processing, even auxiliary oil. This type of processing mainly produces some small workpieces. For precision parts with high precision requirements, their rough and finish machining shall be separated to ensure the quality of parts. The processing of shaft parts can generally be divided into three stages: rough turning (rough turning of excircles, drilling of center holes, etc.), semi precision turning (semi precision turning of all excircles, steps, grinding of center holes and secondary surfaces, etc.), and rough and fine grinding (rough and fine grinding of all excircles). Each stage is roughly divided by heat treatment.

It is roughly estimated that by 2015, the total assets of China's CNC machine tool industry will exceed 240 billion yuan, the sales revenue will exceed 180 billion yuan, and the total profits will reach 12 billion yuan, with an average annual growth rate of more than 10%. At the same time, the technology of CNC machine tools in China will also be greatly improved. By the end of the "12th Five Year Plan", high-end CNC machine tools and basic manufacturing equipment will achieve significant improvement in independent innovation ability, master a large number of core technologies with independent intellectual property rights, and the overall technical level will enter the international advaCNCed ranks. By then, the mainframe, CNC system The fuCNCtional components are "medium scale and high-end industrialization. China will develop a batch of key equipment with international advaCNCed level, and the market share of high-speed, precision vertical and horizontal machining centers, CNC lathes and other products with large imports will be significantly iCNCreased. CNC machining process generally needs to consider the positioning datum, processability, process route formulation, tool selection, clamping mode, process parameters and cutting methods of the parts to be machined. In the traditional machining mode, these considerations have been simplified. Therefore, the CNC processing technology has more factors and is more complex than the ordinary processing technology. Therefore, the entire process of the CNC processing technology should be comprehensively analyzed, reasonable processing technology should be adopted, and the processing scheme should be improved as a whole. The thermal deformation in CNC machining is a more prominent problem. Because CNC machining processes multiple surfaces at the same time, the heat generated in cutting cannot be dissipated in time. However, if there is no dwell time like traditional machining, the machining efficieCNCy will be affected. Due to the characteristics of CNC machining, the machining methods that are not suitable for traditional machine tools are highly feasible in CNC machining. The tailstock guide support boring and the cantilever boring that are transmitted have been replaced by the fixed cycle boring and head turning boring. The dressing method, filling method and empty tool method in the traditional hole processing technology have been replaced by back boring method, numerical control dressing method and arc interpolation.

The processing of precision parts is mainly about size requirements, such as the cylinder diameter. There are strict requirements. Only qualified parts with positive and negative errors within the specified requirements, otherwise they are unqualified parts; There are also specific and strict requirements for length, width and height, and there are also provisions for positive and negative errors. For example, if the diameter of an embedded cylinder (take the simplest basic components as an example) is too large and exceeds the allowable range of errors, it will result in failure to insert. If the actual diameter is too small and exceeds the lower limit of allowable negative values of errors, it will result in too loose and unstable insertion. For precision parts, the processing is very strict, and the processing procedures include knife feeding, knife discharging, etc. Precision parts processing has specific requirements for size, and precision of precision parts processing also has requirements, such as 1mm plus or minus micrometers. If the size is too much wrong, it will become a waste product. At this time, it is equivalent to having to re process, time-consuming and laborious, and sometimes even the entire processing material will be scrapped, which leads to an increase in cost. At the same time, the parts are definitely useless. With the comprehensive deepening of reform and opening up, we have gone through 35 years, and the competition in China's hardware parts market has become increasingly fierce. Many foreign companies continue to enter China's market and take root in China, making use of China's cheap labor to produce their brand products for higher profits. Our own enterprises have been greatly suppressed and excluded. At present, the advanced hardware parts in the world are facing technological breakthroughs, big or small. If China's hardware parts can seize this great opportunity, give play to their advantages, and develop some competitive products with international competitiveness, it is also possible. After the machine is started, one person shall transport materials and operate the machine. Others shall not press the electric building or step on the foot switch board, nor put their hands into the mechanical working area or touch the moving part of the machine. When the machine is working, it is prohibited to put your hand into the slider working area, and it is prohibited to take and place the workpiece by hand. Tools that meet the standards must be used when taking and placing workpieces in the die. In case of any abnormal sound or malfunction of the machine, the power switch shall be turned off immediately for inspection.

There are a lot of knowledge about machining, but for us, this knowledge is not enough to summarize comprehensively, and there will be some omissions. Therefore, we need to supplement and update the knowledge so that we can master more updated knowledge in time, so that we can have a comprehensive and detailed understanding of machining. The production process of machining includes transportation and preservation of raw materials, production preparation, rough embryo manufacturing, parts processing and heat treatment, product assembly and commissioning, etc. By machining in Dalian, the shape, size and performance of raw materials can be changed to meet the requirements of finished products. This process is also called technological process, which is composed of one or several sequential processes. In machining process route, heat treatment process is often arranged. The position of heat treatment process is arranged as follows: in order to improve the cutting performance of metal, such as annealing, normalizing, quenching and tempering, it is generally arranged before mechanical processing. In order to eliminate internal stress, such as aging treatment, quenching and tempering treatment, it is generally arranged after rough machining and before finishing. After receiving the machined parts, full-time acceptance personnel shall be assigned to accept the materials, specifications, models and quantities of machined parts according to the requirements of the contract and drawings. Generally, it is processed at room temperature without causing chemical or phase changes of the workpiece, which is called cold processing. Generally, the processing above or below the normal temperature will cause the chemical or phase changes of the workpiece, which is called hot processing. Cold working can be divided into cutting and pressure machining according to the difference of processing methods. Heat treatment, forging, casting and welding are common hot working. With the development and progress of mechanical processing skills, the structure of mechanical processing equipment is becoming more and more disordered. Mechanical processing equipment is the basic equipment of the manufacturing industry and bears a very large workload in mechanical manufacturing. Therefore, the normal work of mechanical processing equipment is of great significance to ensure the quality of processed products and reduce operating costs.

Shenzhen NC machining refers to the machining that the control system sends instructions to make the cutter make various movements that meet the requirements, and the technical requirements and processing requirements such as the shape and size of the workpiece are expressed in numbers and letters. It generally refers to the technological process of parts processing on CNC machine tools. CNC machining refers to a process method of machining parts on CNC machine tools. The process procedures of CNC machine tools and traditional machine tools are generally consistent, but there have also been significant changes. A machining method that uses digital information to control the displacement of parts and tools. Generally, the machining center is installed in the machining workshop. Not only does the environment temperature change greatly and the service conditions are poor, but also there are many mechanical and electrical equipment, resulting in large fluctuations in the power grid. Therefore, the position where the machining center is installed requires strict control of the power supply voltage. The power supply voltage fluctuation must be within the allowable range and kept relatively stable. Otherwise, the normal operation of the CNC system of the machining center will be affected. The ambient temperature of CNC machining center is less than 30 ° C, and the relative temperature is less than 80%. Generally speaking, the exhaust fan or air cooler is set inside the numerical control electric cabinet to keep the electronic components, especially the central processing unit (CPU) working temperature constant or the temperature difference changes little. Excessive temperature and humidity will reduce the life of control system components and cause more failures. CNC machine tools belong to the manufacturing industry of metal cutting machine tools. Driven by the national revitalization of the equipment manufacturing industry and the transfer of international industries, the growth rate of investment in equipment and tools purchase in China will continue to maintain a 20% level in the next 5-10 years, and the demand of China's machine tool industry will continue to grow at a high speed. Driven by demand, the output of CNC machine tools in China has maintained a rapid growth. With the deepening of economic restructuring, the high growth of listed companies in the category of CNC machine tools and CNC system equipment is expected to continue.

For the processing of precision parts, the processing is very strict, and the processing procedures include knife feeding, knife discharging, etc. There are specific requirements for size and precision, such as the number of plus or minus micrometers of 1mm. If the size is too wrong, it will become a waste product. At this time, it is equivalent to having to re process, time-consuming and laborious, and sometimes even the entire processing material will be scrapped, which leads to increased costs. At the same time, the parts are definitely useless. In a word, there are some requirements for materials in precision machining. Not all materials are suitable for machining, such as too soft or too hard materials. The former is not necessary for machining, while the latter cannot. The process standards of precision parts can be divided into casting, forging, stamping, welding, heat treatment, machining, assembly and other categories according to different processes. The processing process of precision parts generally refers to the general term of the NC processing and machine assembly process of the whole part, while other processes such as cleaning, inspection, equipment maintenance, oil seal, etc. are just auxiliary processes. Machine tool parts classification: box, base, spindle, flange, sheet metal, etc. There are different equipment corresponding to different processes. The most common ones are lathes (including numerical control and conventional turning), milling machines, planers, grinders, radial drills, wire cutting machines, heat treatment furnaces, etc. The large-scale propeller in the military industry must use a five axis four linkage machine tool. Shenzhen precision parts processing technology is a technology that stipulates the processing process and operation method of precision mechanical parts. It is a process document that, under specific production conditions, writes a more reasonable process and operation method into a process document in the specified form, and then uses it to guide production after approval. The processing procedure of precision mechanical parts generally includes the following contents: the processing route of workpiece, the specific contents of each process, the equipment and process equipment used, the inspection items and methods of workpiece, cutting amount, time quota, etc.

Numerical control processing refers to the processing in which the control system sends instructions to enable the cutter to make various movements that meet the requirements, and the technical requirements and processing technology requirements such as the shape and size of the workpiece are expressed in numbers and letters. It generally refers to the technological process of parts processing on CNC machine tools. The concept of numerical control processing in Shenzhen is numerical control processing, which refers to a process method for processing parts on numerical control machine tools. The processing procedures of numerical control machine tools are generally consistent with those of traditional machine tools, but significant changes have also taken place. A machining method that uses digital information to control the displacement of parts and tools. It is an effective way to solve the problems of variety, small batch, complex shape, high precision and high efficiency and automatic processing of parts. Numerical control processing is an automatic processing technology. The requirements for workers' skills in operation are reduced, the quality of processing workpiece is stable, and the processing efficiency is relatively high. Automatic processing eliminates a large number of errors in workers' operation, and product consistency and production efficiency are improved. The ambient temperature of CNC machining center is less than 30 ° C, and the relative temperature is less than 80%. Generally speaking, the exhaust fan or air cooler is set inside the numerical control electric cabinet to keep the electronic components, especially the central processing unit (CPU) working temperature constant or the temperature difference changes little. Excessive temperature and humidity will reduce the life of control system components and cause more failures.