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

The aluminum shell is produced and cast under high temperature. The production speed of aluminum shell is too fast, and the cooling strength is relatively large, resulting in some elements in the alloy can not be converted into the required elements within the specified time. Because this material has needle like structure, high hardness and poor plasticity. Moreover, the tensile strength of this manufacturing process is very low, and not only yellow rust but also cracks will appear at high temperature. The aluminum shell produced in this way will have granular burrs. If the burrs are not removed, it will have a very bad feel. Tadpole like tails are often accompanied by such particles, which can be observed under a microscope. Moreover, the color of such impurities is gray, containing a lot of iron elements.

Machinery processing plants have their own technical points, that is, each has its own skills. Dalian Machinery Processing Plant will share with you some of their machining skills! Hope to help everyone!!! The machining process refers to the whole process of making the shape, size, relative position and nature of the blank into qualified parts by using traditional machining methods according to the drawings and dimensions. The processing process is what workers need to do before processing to avoid processing errors and economic losses in the processing process. 1. Heat treatment process is often arranged in the machining process route. 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 Dalian. In order to eliminate internal stress, such as aging treatment, quenching and tempering treatment, it is generally arranged after rough machining and before finishing. In order to improve the mechanical properties of parts, such as carburizing, quenching, tempering, etc., it is generally arranged after mechanical processing in Dalian. If there is large deformation after heat treatment, the final processing procedure must be arranged. 2. In order to ensure the machining accuracy, rough and finish machining should be carried out separately. Because of the large cutting amount during rough machining, the cutting force and clamping force on the workpiece are large, the heat generation is large, and the machining surface has a significant work hardening phenomenon, there is a large internal stress in the workpiece. If rough and rough machining are carried out continuously, the precision of the finished part will be lost quickly due to the redistribution of stress. For some parts with high machining accuracy requirements. After rough machining and before finishing, low-temperature annealing or aging treatment shall be arranged to eliminate internal stress. 3. The equipment shall be selected reasonably. Rough machining is mainly to cut off most of the machining allowance, and does not require high machining accuracy. Therefore, rough machining should be carried out on a machine tool with high power and low accuracy, while finishing requires a machine tool with high accuracy. Rough and finish machining are processed on different machine tools, which can not only give full play to the equipment capacity, but also extend the service life of precision machine tools.

The higher the precision of precision parts in specific applications, the more exquisite they will be, the more they will reflect the processability and quality. At the same time, this product is more popular with customers. Generally speaking, CNC machining centers have incomparable advantages and characteristics in production and processing, and their product quality is generally higher. What are the characteristics of CNC precision parts? 1. First of all, the production efficiency of NC precision parts processing is higher. NC parts processing can produce and process several layers at the same time. Compared with general NC processing, it can save a lot of technological processes and time. In addition, the quality of parts produced by NC machining centers is relatively stable compared with that of ordinary lathes. 2. NC precision parts processing plays an irreplaceable role in the research and development of new products. Generally speaking, parts with different complexity can be processed according to programming. However, the modification and upgrading design scheme only needs to change the program flow of the NC lathe, which can greatly reduce the product development cycle time of commodities. 3. The automation level of CNC precision parts processing is very high, which greatly alleviates the energy and labor efficiency of employees. Employees do not need to operate the whole process like ordinary lathes in the production process, but mainly observe and supervise the CNC lathes. However, the scientific and technological content of the corresponding CNC machining center is higher than that of the ordinary lathe, so the relative ordinary lathe requires higher brain usage. 4. The initial investment is relatively large for ordinary lathes, because the price of the machining center is very high, and its maintenance cost and initial preparation period for production and processing are long.

Precision machining is the whole process of changing the size or characteristics of the product workpiece with processing equipment, which is also non-standard automatic processing. According to the temperature of the processed product workpiece, it can be divided into cold drawing and heat treatment. Generally, it is processed at room temperature without causing organic chemistry or phase transformation of the product workpiece, which is called cold drawing. Generally, processing at a temperature higher or lower than normal will cause organic chemistry or phase transformation of product workpiece, which is called heat treatment. Cold drawing can be divided into drilling and working pressure processing according to the difference of processing methods. What are the design steps and requirements for precision machining? Let's learn about it: 1. A large number of production and manufacturing types; 2. Analyze the process of parts (select national standards); 3. Determine the type, shape, specification and precision of hair germ; 4. Draw up the process route. It is an important step in formulating process procedures. The key work is to select accurate positioning standards, determine the processing method of each surface layer, assign the processing sequence, determine the level of centralization and decentralization of the process flow, and allocate the heat treatment process, detection and other auxiliary process flows. When drawing up the process route, we usually clearly put forward many possible plans, analyze and compare them, and finally determine the best plan; 5. Determine the machine and equipment selected for the process flow.

The CNC precision parts processing manufacturer said that the strength of the parts refers to the ability of the parts to work without fracture or plastic deformation beyond the allowable limit, which is the most basic requirement for normal operation and safe production of the machine. The principles and measures to improve the strength of parts are as follows:   ① increase the size of the dangerous section of parts, and reasonably design the section shape to increase the inertia moment of the section;   ② High strength materials shall be used to improve the strength and reduce the internal stress, and the processing technology shall be controlled to reduce or eliminate the micro defects;   ③ Try to reduce the load on the parts;   ④ Properly involve the structure of parts to reduce stress concentration. The CNC precision parts processing manufacturer said that the rigidity of the parts refers to the ability of the parts to work without producing more than the specified elastic deformation. This requirement is only for those parts whose working performance will be reduced due to excessive elastic deformation. The principles and measures to improve the overall stiffness of the parts are as follows: properly increase the section size of the parts, reasonably design the section shape of the parts, reasonably add reinforcing ribs, and adopt multi point structure; The principles and measures to improve the contact stiffness of parts include: improving the machining accuracy of contact surface or appropriately increasing the contact area to reduce the unit pressure, etc. The CNC precision parts processing manufacturer said that the life requirement of the parts is to require the parts to keep normal operation during the expected working period without scrapping. This requirement is mainly put forward for those parts that are worn or corroded when working under variable stress. As the main factors affecting the fatigue limit of parts are stress concentration, size, surface quality and environmental conditions, the main measures to improve the life of parts are as follows:;   ① Properly involve part structure to reduce stress concentration;   ② Adopt processing or surface strengthening treatment to improve the working surface quality of parts;   ③ Reasonably select matching materials, lubricants and lubrication methods of friction pairs to improve the wear resistance of parts;   ④ Select corrosion-resistant materials to manufacture parts working in corrosive media;   ⑤ Use heat treatment to improve the mechanical properties of part materials, or use rolling, shot peening and other processes to generate favorable residual stress on the surface of parts. CNC precision parts processing manufacturers said that the processing requirements of the parts are that under the given process conditions and production levels, the parts can be manufactured with less cost and labor, and easy to assemble. The structure of parts shall be reasonably designed from the aspects of production batch, materials, blank production, processing method, assembly process, use requirements, etc. The economic requirements of parts are to use lower costs and less man hours to manufacture parts that meet the technical requirements, which is closely related to the processability of parts and affects the economic efficiency of machinery to a large extent. Measures can be taken to reduce material consumption, adopt small or no allowance blanks, replace expensive materials with cheap materials, only use high-quality and expensive materials in key parts of parts, and try to use standard parts to improve the economy of parts.

Machinery parts manufacturers said that since the emergence of machinery, there have been corresponding mechanical parts. But as a discipline, mechanical parts are separated from mechanical tectonics and mechanics. With the development of machinery industry and the emergence of new design theories and methods, new materials and new processes, mechanical parts have entered a new stage of development. The theories of finite element method, fracture mechanics, elastohydrodynamic lubrication, optimization design, reliability design, computer aided design (CAD), solid modeling (Pro, Ug, Solidworks, etc.), system analysis and design methodology have been gradually applied to the research and design of mechanical parts. It is an important trend for the development of this discipline to better realize the integration of multiple disciplines, realize the combination of macro and micro, explore new principles and structures, more use dynamic design and accurate design, more effective use of electronic computers, and further develop design theories and methods. The surface roughness is an important technical index reflecting the micro geometric shape error of the part surface, and is the main basis for inspecting the part surface quality; Whether it is reasonable or not is directly related to the quality, service life and production cost of products. There are three methods to select the surface roughness of mechanical parts, namely, calculation method, test method and analogy method. In the design of mechanical parts, the most common method is analogy, which is simple, rapid and effective. The application of analogy requires sufficient reference materials, and various existing mechanical design manuals provide more comprehensive materials and documents. The most commonly used is the surface roughness corresponding to the tolerance class. In general, the smaller the dimensional tolerance requirement of mechanical parts is, the smaller the surface roughness value of mechanical parts is, but there is no fixed functional relationship between them. For example, the handle and handwheel on some machines and instruments, as well as the modified surface of some mechanical parts on sanitary equipment and food machinery, are required to be machined very smoothly, that is, the surface roughness is required to be very high, but the dimensional tolerance requirements are very low. In general, there is a certain correspondence between the tolerance grade and the surface roughness value of parts with dimensional tolerance requirements. The above is the origin of mechanical parts explained by the mechanical parts processing manufacturer. I hope it will be helpful to you after reading

Common equipment for precision parts processing: CNC machining center, CNC lathe, milling machine, grinder, electric spark, wire cutting, etc. A variety of commonly used equipment, including 3-axis, 4-axis and 5-axis CNC, machining centers (computer gongs), CNC machining centers, and centering machines; At the same time, there are also special production equipment for ultra precision and difficult parts; Precision tool grinder, internal and external grinding, electric spark, various fast/medium/slow wire and other production equipment. Precision parts processing equipment is a kind of production equipment with very high precision, and has a relatively high stability and long life. As far as it is concerned, this kind of production equipment is mainly composed of two parts: one is the inductor that directly contacts the mechatronics production and manufacturing route and the other is a signal distributor. Nowadays, the common precision parts processing equipment works according to the basic principle of magnetic effect of current. For customers, when they choose to purchase precision parts processing equipment, they should first connect the production equipment with the mechatronic production and manufacturing route before applying such production equipment. At this stage, in various fields, there are different methods for connecting the production equipment with the mechatronic production and manufacturing route. First of all, flange is used for connection. This kind of flange connection method is relatively traditional. Both sides of the precision parts processing equipment can be connected. When the flange is connected to the electromechanical production line, it is only necessary to fix the flange on both sides and the commonly used anchor bolts on the electromechanical production line. For the selection of such connection methods, most of them can be installed unilaterally, and the volume limit of the controller of production equipment with such connection methods is relatively small. Therefore, this type of connection can be applied in some electromechanical integration production and manufacturing routes with relatively small volumes. In addition, one method of installing precision parts processing equipment is to modify the connection. This type of connection mode is relatively advanced. Some controllers without flange connection holes are all connected in that way now. This type of connection is relatively simple at this stage. The characteristics of precision parts processing equipment are that the direct impact on the mechatronics production and manufacturing route is relatively small, and the manipulation standard is large, and the processing accuracy is particularly high. During the production and processing process, the manipulation of the mechatronics production and manufacturing route is almost not affected by the relative density, working pressure, temperature and other environmental monitoring systems. Therefore, many enterprises and industries will use this type of production equipment. This is because the stability of this type of production equipment is very reliable, and there is not too many movable equipment parts in the production equipment, so the amount of labor for maintenance is relatively small, which can maintain a long-term stable working situation.

When machining precision parts, roundness measurement method and two-point three-point method can be used for detection. The circular instrument law is to place the measured part on the workbench of the roundness instrument, align the rotating centerline, and make the roundness instrument probe contact with the inner hole of the workpiece for rotation. Based on sensor, amplifier, filter and measurement power circuit, accurate measurement results are finally displayed. If the output is a specific contour map, the inscribed circle template can be used, and the difference between the radii of the two tolerance circles of the same boat can be taken as the roundness error of a section. The instrument is suitable for parts with high measurement accuracy requirements. If the measured contour is an odd edge circle, the roundness error cannot be measured with the two-point method. At this time, the three-point method can be used for accurate measurement. Support the workpiece of the product to be tested with a V-shaped support, and measure the large error caused by one rotation of the workpiece with an indicator, which is taken as the roundness error of the section. Common V intersection angle α 60 degrees, 72 degrees, 90 degrees, 108 degrees and 120 degrees respectively. The three-point method can also be used for high-precision and accurate measurement in precision parts processing. The above description is about the inspection methods for precision parts processing. I hope it will be helpful to you after reading

CNC precision parts processing is not suitable for precision processing of all materials. Some materials are too hard and exceed the strength of the parts to be processed, which is likely to cause the collapse of equipment parts. Therefore, such materials are not suitable for precision machining, unless they are equipment parts made of special materials or laser cutting. The requirements are for every work, because it will also endanger the quality of the equipment manufactured. Therefore, in order to maintain the quality of the equipment, we should not only have requirements on the machinery and equipment, but also on the use of staff and some processed materials., This kind of products must have certain specifications. Only when this kind of products meets the requirements, can the products produced be the ideal appearance of everyone. So let's know what the requirements of CNC precision parts processing on materials are? The processed materials are divided into two categories, metal materials and non-metallic materials; For metal materials, the strength of stainless steel plate is the largest, followed by pig iron, followed by copper, and finally aluminum. The processing of porcelain and plastics belongs to the processing of non-metallic materials. For the strength requirements of materials, in some places, the higher the strength of materials, the better, but only the strength requirements of machined parts. Processing materials shall not be too hard; If it is harder than mechanical parts, it is difficult to process; The material must be moderately hard and soft. At least one level lower than the strength of the part. At the same time, it depends on the role of the equipment to be produced and the effective selection of the equipment. In the manufacturing process of CNC precision parts, because the manufacturing requirements and standards of each part are different, the manufacturing process plan is also different. When different process plans are selected to manufacture the same parts, their productivity and economic benefits are also different.

Before each CNC precision part processing program, it is required to strictly determine whether the tool is consistent with the program. It is necessary to determine the length of the tool and whether the tool clamping blade is suitable for cutting. It is strictly forbidden to start the door to prevent darts or workpiece flying during the machine tool operation. In the whole process of CNC precision parts processing, if the operator finds the knife collision, he must park the car immediately, such as pressing the "Emergency Termination" button or the "Reset Switch" button or setting the "Feed Rate" to zero. Each tool setting in the same workpiece shall be kept in the same area to ensure the accuracy of the tool when receiving the tool. In the whole process of CNC precision parts processing, if it is found that there is too much machining surplus, it is necessary to use "single section" or "stop" to clear the X, Y, Z mark values, and then manually mill them off, and then shake them back to "zero" to allow them to operate independently. During the autonomous operation, the operator shall not leave the machine tool or inquire about the management of the machine tool on time. If it is necessary to leave halfway, it must be checked by specific staff. Clean up the aluminum slag in the machine tool before spraying oil with the light knife to prevent the aluminum slag from degreasing. Blow with air as much as possible in the roughening procedure, and inject oil in the light knife procedure. The workpiece shall be removed, ground and polished immediately after it is unloaded at a high speed. At the time of off duty, the operator must do a good job of immediate and accurate work handover to ensure that all subsequent production and processing can be carried out normally. Before standby, make sure that the tool magazine system is at the initial position and XYZ axis is stopped at the center position. Turn off the power supply and the main power supply on the machine tool operation panel successively. In case of thunderstorm, be sure to disconnect the power supply and stop working immediately.