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

Non-standard parts processing general customers are asking which company will be good, or which manufacturer good workmanship, is it worth my choice, in fact, choose the right manufacturer to start from many aspects, the first is the reputation, a manufacturer to choose the right words, you first is to know whether this manufacturer workmanship, if the workmanship is not good, you think the quality will be good, and the manufacturer's experience is not enough, the manufacturer's experience, then many problems can be solved, the problems that customers are worried about can be solved, choose this manufacturer cooperation is worth your trust! Non-standard products refer to products or equipment that are not manufactured according to the uniform industry standards and specifications promulgated by the state, but are designed and manufactured by ourselves according to our own usage needs. And the appearance or performance is not in the national equipment catalog. Standard parts refers to the structure, size, drawing, marking and other aspects have been completely standardized, and by the professional factory production of common parts (parts), such as threaded parts, keys, pins, rolling bearings, etc.. Broadly speaking, including standardized fasteners, links, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs and other mechanical parts. Narrow sense only includes standardized fasteners. Domestic commonly known as standard parts is the abbreviation of standard fasteners, is a narrow concept, but can not exclude the existence of the broad concept. In addition, there are industry standard parts, such as automotive standard parts, mold standard parts, etc., also belong to the broad sense of standard parts. Non-standard parts processing process is composed of the basic unit of the machining process. The so-called process refers to a (or a group of) workers, on a machine tool (or a workplace), on the same workpiece (or several workpieces at the same time) to complete that part of the process in succession. The main feature of a process is not to change the processing object, equipment and operator, and the process is completed continuously.

Computer gong processing requirements to what range of accuracy, in now so many applications is related to what? Accuracy range. Transfer all the programs into the computer according to the programming list, simulate with the toolpath simulation software, inspect the machining area and the highest and lowest depths of machining, determine the clamping direction of the workpiece and the clamping reserve position and the length of the tool. Place the workpiece on the clamping tool of the machine, level the workpiece plane and verticality and parallelism, with a verticality tolerance of ±0.015 or less, then fix the workpiece firmly and start centering, following the position centering and Z-axis touch size as indicated in the programming list. (Pay attention to whether the edge finder collides with the workpiece when centering.) Input the data of mechanical coordinates X, Y and Z into the corresponding coordinates. Check whether the tool on the program list matches with the tool on the machine tool library. Simulate the program with the toolpath simulation software and check the machining area and the highest and lowest depths to determine the clamping direction, the reserved position and the length of the tool for the copper male. Industry development relationship. 1, the use of precision level meter and other detection tools, mainly through the adjustment of the pad iron way to fine tune the level of the main bed of the computer gong processing machine tool, so that the geometric accuracy of the machine tool to the allowable tolerance range; 2, the automatic tool change device, adjust the tool magazine, robot position, stroke parameters, etc., and then use the instructions to check the action, the requirements are accurate; 3, with APC automatic table exchange machine tools, adjust the relative position of the load-bearing automatic exchange; 4, after the machine is adjusted, carefully check whether the parameters set in the CNC system and programmable controller are in line with the data specified in the random indicators, and then test the main operating functions, security measures, common command execution, etc. 5, check the normal work of the machine tool auxiliary functions and accessories.

Nuts, studs, stainless steel production, with now is more and more intelligent, in the production of these equipment parts, choose accurate, high standard equipment, with the progress of science and technology, intelligent, automated instruments, equipment in the circulation of various fields has a very fast speed, which brings a new stage of challenges and opportunities for the development of precision parts. In this paper, we analyze the market demand and process concept of precision parts, combine the skills and problems in actual processing (limited to the scope of pincer work), and discuss the solutions and techniques of the problems related to the processing of precision parts, so as to improve the quality of precision parts, improve the contradiction between market supply and demand, and promote the development of a technological and intelligent society. In actual production, the structure of each part may be very different, which also greatly increases the difficulty of processing. But if you look carefully, you can find that the basic geometric composition of the part is nothing more than the outer circle, bore, plane, thread, tooth surface, surface and so on several, so as long as you master the processing of these shapes, the difficulty of precision parts processing can also be significantly reduced.   In the process of precision parts processing, the selection of the positioning reference is reasonable or not to determine the quality of the parts, and whether to ensure the dimensional accuracy of the parts and mutual position accuracy requirements, as well as the processing sequence between the surfaces of the parts have a great impact. If the fixture is used to install the workpiece, the choice of positioning reference will also affect the complexity of the fixture structure. Therefore, the selection of the positioning reference is a very important process issue in the processing of precision parts. Today in part of the production process have been mechanized, automated production, then the use of automated processing system can automatically monitor its operating status, in the presence of external interference or internal excitation can automatically adjust its parameters to achieve the best state and has the ability to self-organization, so as to ensure the processing accuracy of the premise to significantly improve the efficiency of rough and finish machining.

The main reason for the machining process, from our hardware precision process, in fact, there are also a lot of reasons will have a certain impact on the surface roughness of its parts. Mainly there are tools and workpiece materials, CNC conditions caused by the reasons. About the geometric reasons it is mainly affected by the shape of the tool, the angle of deviation and vice angle of deviation will have a greater impact on the surface roughness. We then process plastic materials will also form band cutting and the formation of cumulative cutting tumor, and hardness is also very high, for physical reasons in the workpiece cutting process, the cutting edge rounding and extrusion can make the metal material deformation, which will cause serious deterioration of the surface roughness, cumulative cutting tumor appearance properties will also be completely irregular, and thus it is easy to make the workpiece surface appear depth and width of different knife marks. There are also such as speed and cutting speed mismatch, the material is too hard to eat too much tool, the workpiece is not pressed, and the workpiece is too elastic, rubber products such as tool body is too long, processing tool shake, the machine itself, such as: screw line rail and other activities such as clearance is too large, etc.. These are bound to increase the surface of the parts produced roughness.   The advantages of cnc machining center of in industrial production, involving materials, technology, cost, the use of the number of issues, there are many parts can not be mass production through the machine, so that it is necessary to carry out small-scale or small medical parts processing through some special process, the middle may also involve manual processing links. Generally, the main use of CNC, rapid mold, vacuum silicone re-mold process to achieve small batch production. cnc processing of the advantages of medical parts processing from single to triple digits, is through the simple mold, soft mold, or direct processing out. Medical parts processing is generally turning, milling, planing, grinding, pincer and other usual mechanical processing, pincer undercutting, drawing lines, punching, tapping, etc.. Representative industries are aviation, aerospace industry, shipbuilding industry, construction machinery industry, machine tool industry, etc. The typical representative of mass production is the automobile industry, while the trial production of new models and engines etc. in the automobile industry and the mold industry which mainly serves for mass production still belong to single small batch production.

Selection, use and maintenance of cnc cutting fluid for aluminum alloy machining Compared with most steel and cast iron materials, aluminum has many remarkable characteristics in physical properties: its strength and hardness are much higher than that of pure aluminum, but it is lower than steel, its cutting force is smaller, and its thermal conductivity is good. Because aluminum alloy CNC machining is soft, plastic and easy to stick to the cutter, BUE is formed on the cutter, and fusion may occur on the cutter edge during high-speed cutting, which makes the cutter lose cutting ability and affects machining accuracy and surface roughness. In addition, the thermal expansion coefficient of aluminum is large, and the cutting heat easily leads to thermal deformation of the workpiece, reducing the machining accuracy. Cnc cutting fluid for aluminum alloy machining To sum up, the selection of cutting fluid for aluminum alloy CNC machining is very important, and good lubrication, cooling, filtering and rust prevention performance must be guaranteed. Therefore, the cutting fluid for aluminum CNC machining is different from ordinary cutting fluid, so it is important to select a suitable cutting fluid. Different cutting fluids should be selected according to the machining conditions and accuracy requirements of aluminum alloy cnc. High speed CNC machining will generate a lot of heat, such as high-speed cutting and drilling. If the generated heat cannot take away the cutting fluid in time, the tool will stick, and even BUE will occur, which will seriously affect the processing roughness and tool life of the workpiece, and will also cause thermal deformation of the workpiece, seriously affecting the accuracy of the workpiece. Therefore, the choice of cutting fluid needs to consider its own lubricity and cooling performance. For grinding, the wear debris is very small, and a lot of heat will be generated during the grinding process. Both the lubrication and cooling performance of the cutting fluid and the filtration of the cutting fluid should be considered. If the viscosity of the selected cutting fluid is too high, the chips cannot be deposited or filtered off. It will scratch the surface of the workpiece processing area with the circulation of the coolant, thus affecting the processing of the surface finish. Therefore, ultra-fine grinding is selected as grinding or low viscosity grinding oil or semi synthetic cutting fluid grinding to reduce wear. When selecting cutting fluid, in addition to the lubricating and cooling properties of cutting fluid, the corrosion resistance, cost and maintainability of cutting fluid should also be considered. Cutting oil is easy to choose base oil antifriction additives with relatively low viscosity, which can not only achieve lubrication and friction, but also have good cooling and easy filtration. However, cutting oil has some problems, such as low flash point, large smoke during high-speed cutting, high risk factor, fast volatilization, and correspondingly high user cost. Therefore, if conditions permit, water-soluble cutting fluid should be used as far as possible. For water-based processing fluid, it is more important to consider rust prevention. The commonly used water-based antirust agents are aluminum silicate and phosphate. As a kind of cutting fluid phosphate antirust agent, which is easy to use when the workpieces are stored for a long time in processing, black "silicon spots" will appear when the silicon based materials and aluminum are exposed to corrosion for a long time. The ph value of the cutting fluid is kept above 8~10. If the rust is not good, the aluminum is easily corroded under alkaline conditions. Therefore, the water-soluble cutting fluid must have good aluminum corrosion resistance.Aluminum alloy CNC processing factory 2、 Application and maintenance of cnc cutting fluid for aluminum alloy The formula and use of cnc cutting fluid for aluminum alloy machining are basically the same as those of ordinary cutting fluid, but the selection of dilution water is more strict. Because many aluminum ions in the water will cause corrosion, if the content of these ions is too high, the antirust performance of the cutting fluid will be reduced, especially rust in the processing room, such as chloride ions, sulfate ions and heavy metal ions. In addition, some ions will react with the antirust agent of the aluminum cutting fluid, reducing the antirust property and stability of the cutting fluid, such as calcium and magnesium ions. Therefore, dilution water with low hardness or ion exchange water after dilution shall be selected as far as possible to soften, so as to ensure the service effect and life of cutting fluid. In addition to the daily maintenance of the cutting fluid, the following points should also be noted: 1. Filtering Due to the stability of aluminum soap reaction of aluminum alloy, the cutting fluid is easy to be damaged under alkaline conditions. The aluminum chips, aluminum chips and cutting fluid should be filtered immediately to avoid the reaction again, which will affect the service effect and life of the cutting fluid. The aluminum chips produced in the grinding process are small and light, so it is difficult to continue to precipitate. If the aluminum chips are not filtered or not filtered sufficiently, the aluminum chip processing area will be taken away with the cutting fluid circulation system, and the scratch surface will affect the glossiness of the processing surface. 2. Ph value Because aluminum cutting fluid is very sensitive to the ph value, the ph value of aluminum cutting fluid shall be tested regularly, and it shall be adjusted in time in case of any abnormality. The ph value shall be controlled at 8-9 to avoid excessive corrosion of the workpiece or bacterial reproduction caused by low ph value, which will affect the stability and performance of the cutting fluid. 3. Add new scheme regularly It can not only ensure good lubricity of cutting fluid, but also ensure good rust and corrosion resistance of cutting fluid, so as to prolong the service life of cutting fluid. conclusion It is very important to select the cutting fluid for aluminum alloy CNC machining. It should not only ensure the good lubricity and corrosion resistance of the cutting fluid, but also have good stability, filtration and easy maintenance. Only in this way can the requirements for machining products be met and the cutting cost of the body fluid be minimized.

  When precision cnc processing plants produce products, small mistakes of operators often lead to product deformation, which affects the production efficiency of enterprises. So how to reduce cnc machining deformation of mechanical parts? Let's take a look. Heat treatment processing: for precision cnc processing of parts, due to a variety of reasons, products are prone to bending after heat treatment. On the one hand, there will be bulges in the middle and the plane deviation will increase, which is caused by improper operation of the operator, but this rarely happens in our company; On the other hand, due to various external factors, the fixture has bending phenomenon. These deformation problems are not only due to the change of internal stress after heat treatment, but also due to the weak professional knowledge of operators and the lack of understanding of the structural stability of products, which increases the probability of part deformation. It is also important to read the drawings accurately and carefully and process machine parts according to the drawings. Clamping too tight: auxiliary tools are often used to clamp products during precision CNC machining. In order to avoid vibration during cnc processing of products, this method is used, but there will also be some similar situations of heat treatment. At this time, adjust the clamping force according to the position of the clamping point to increase the contact area between the fixture and the workpiece as much as possible. This treatment will be much better, thus reducing the deformation of precision cnc machining. Tool cutting: due to the insufficient rigidity of the product or tool and the influence of the cutting force, the product is thicker and thinner, which is called tool feeding. The way to deal with this phenomenon is to improve the sharpness of the blade and reduce the friction resistance between the blade and the workpiece.

Aluminum alloy and stainless steel parts for aerospace When machining parts for aerospace applications, many factors need to be considered, such as the shape, weight, and durability of the parts. These factors will affect the flight value of aircraft. For many years, the preferred material for aerospace applications has been aluminum alloy. However, in modern jet aircraft, it only accounts for 20% of the structure. However, due to the demand for light aircraft, the use of carbon reinforced polymers and honeycomb materials in the modern aerospace industry is increasing. In recent years, aerospace manufacturers have begun to research alternatives to aluminum alloys, one of which is aviation grade stainless steel. The use of this stainless steel in new aircraft components has increased. This article will explain the use and difference of aluminum alloy and stainless steel in modern aircraft. Aerospace aluminum alloy parts Applied aerospace aluminum alloy parts Aluminum is a relatively light material, weighing about 2.7 g/cm3 (grams per cubic centimeter). Although aluminum is lighter and cheaper than stainless steel, its strength and corrosion resistance are not as good as stainless steel. Stainless steel is superior to aluminum in durability and strength. Although the use of aluminum alloys has declined in many aspects of aerospace production, aluminum alloys are still widely used in modern aircraft. For many specific applications, aluminum is still a strong, lightweight material. Because of its high ductility and ease of processing, it is relatively cheap compared to many composites or titanium. It can also be further strengthened by alloying it with other metals, such as copper, magnesium, manganese and zinc, or by cold or heat treatment. When aluminum is exposed to air, close chemical oxidation bonds isolate aluminum from the environment. This function makes it extremely corrosion resistant. The most popular aluminum alloys used to manufacture aviation parts include:  Aluminum alloy 7075 (aluminum/zinc)  Aluminum alloy 7475-02 (aluminum/zinc/magnesium/silicon/chromium)  Aluminum alloy 6061 (aluminum/magnesium/silicon) 7075 is a combination of aluminum and zinc. It is the most commonly used alloy in aerospace applications. It has excellent mechanical properties, ductility, strength and fatigue resistance. 7475-02 is a combination of aluminum, zinc, silicon and chromium, while 6061 contains aluminum, magnesium and silicon. Which alloy is required depends entirely on the intended application of the end. Although many aluminum alloy aircraft parts are purely decorative, some parts are essential to the function of the aircraft and must have specific characteristics. Aluminum scandium is an aluminum alloy commonly used in aerospace industry. Adding scandium to aluminum can enhance the strength and heat resistance of the metal. The use of aluminum scandium can also improve fuel efficiency. Since it is a substitute for materials with higher density, such as steel and titanium, replacing these materials with lighter aluminum scandium can reduce weight and improve fuel efficiency. Stainless steel parts for aerospace applications In the aerospace industry, stainless steel seems to be a surprising choice compared with aluminum. Although stainless steel is heavier, its use in aerospace applications has recently increased. Stainless steel refers to a series of iron base alloys containing at least 11% chromium, which is a compound that prevents iron corrosion and provides heat resistance. Different types of stainless steels include elements nitrogen, aluminum, silicon, sulfur, titanium, nickel, copper, selenium, niobium and molybdenum. The type of stainless steel has been classified and indicated by three figures. Although the commonly used stainless steel is only about one tenth, there are more than 150 stainless steel grades. In addition, stainless steel can be made into sheet, plate, bar, wire and pipe, making it suitable for various applications. There are five main groups of stainless steels, mainly classified according to their crystal structures. These groups are austenitic, ferritic, martensitic, duplex, and precipitation hardening stainless steels.

Main causes of cnc precision machining errors Cnc machining accuracy refers to the degree of conformity between the actual geometric parameters (size, shape and position) and the ideal geometric parameters. In processing, error is inevitable, but the error must be within the allowable range. Through error analysis, grasp the basic law of its change, so as to take corresponding measures to reduce machining errors and improve machining accuracy. Then there are also reasons for errors, which are roughly as follows: 1. Spindle rotation error_ Spindle rotation error refers to the change of actual spindle rotation axis relative to its average rotation axis at each moment. The main reasons for the radial rotation error of the main shaft are: the coaxiality error of several sections of the main shaft journal, various errors of the bearing itself, coaxiality error between bearings, and the deflection of the main shaft. Cnc precision machining of aluminum parts 2. Guide rail error. __ The guide rail is the benchmark for determining the relative position of various machine tool parts on the machine tool, and also the benchmark for machine tool movement. The uneven wear and installation quality of the guide rail are also important factors that cause the guide rail error. 3. Drive chain error_ The transmission error of the transmission chain refers to the relative motion error between the transmission components at the head and tail of the transmission chain. The transmission error is caused by the manufacturing and assembly errors of the components of the transmission chain and the wear in the use process. 4. Geometric error of tools. In the cutting process of any tool, wear will inevitably occur, which will cause changes in the size and shape of the workpiece. 5. Positioning error. One is the error of inconsistent benchmarks. The datum used to determine the size and position of a surface on the part drawing is called design datum. The reference object on the process drawing used to determine the size and position of the processing surface of the process is called the process reference object. When machining a workpiece on a machine tool, several geometric elements on the workpiece must be selected as the positioning reference for machining. If the selected positioning datum does not coincide with the design datum, datum misalignment error will occur. Second, the manufacturing error of positioning pair is inaccurate. 6. Errors caused by force and deformation of process system. The first is the rigidity of the workpiece. In the process system, if the rigidity of the workpiece is relatively low compared with that of the machine tool, tool and fixture, the workpiece deformation due to insufficient rigidity will have a greater impact on the machining accuracy under the action of the cutting force The second is tool stiffness. The rigidity of the cylindrical turning tool in the normal direction of the machining surface is very large, and its deformation can be ignored. When boring a small diameter inner hole, the rigidity of the cutter bar is very poor. The force and deformation of the cutter bar have a great impact on the machining accuracy of the hole. The third is the rigidity of machine tool components. Machine tool components consist of many parts. So far, there is no suitable simple calculation method for the stiffness of machine tool components. At present, experimental methods are mainly used to determine the stiffness of machine tool components. CNC milling 7. Errors caused by thermal deformation of the process system. The thermal deformation of the process system has a great influence on the machining accuracy, especially in precision machining and large part machining, the machining error caused by thermal deformation can sometimes account for 50% of the total error of the workpiece. 8. Adjustment error. In each process of machining, the process system must be adjusted in one way or another. Adjustment errors occur because the adjustment cannot be absolutely accurate. In the process system, the mutual position accuracy of workpiece and cutter on the machine tool is guaranteed by adjusting the machine tool, cutter, fixture or workpiece. When the original accuracy of machine tool, cutter, fixture and workpiece blank meets the process requirements without considering dynamic factors, the influence of adjustment error will play a decisive role in the processing accuracy. 9. Measurement error. When measuring parts during or after processing, the measurement accuracy is directly affected by the measurement method, measuring tool accuracy, workpiece and subjective and objective factors.

Is cnc machining of titanium alloy difficult? Titanium alloy plays an integral role in the field of mechanical processing because of its unique properties. However, many people believe that processing titanium alloys is a considerable challenge. Compared with other materials, we can say that titanium is a hard nut to crack. Cnc machining of titanium alloys First of all, titanium alloy cnc machining process will produce a lot of heat, damage the surface of the parts, thus affecting product quality. Secondly, titanium alloy has a high hardness and thickness, and the chip breaking formed during the processing may entangle the tool, making it unable to work normally, and it is almost impossible to realize the automation of titanium processing. How to process titanium alloy correctly? 1. Titanium alloy CNC machining requires geometric positive angle tools to reduce cutting force, cutting heat and workpiece deformation. By using "down milling", arc machining ends with a 45 degree chamfer, which helps reduce tool damage. 2. High pressure and large flow coolant helps to ensure the thermal stability of the machining process and prevent the surface degradation and tool damage caused by overheating. 3. Work in the softest state of titanium alloy as much as possible, because the material becomes more difficult to machine after hardening. The difficulty of titanium metal processing also makes its products unique. For more help on titanium processing, you can contact our experienced Vermeer engineers at any time to obtain customized titanium alloy CNC processing solutions.

Now precision machining in the accuracy of the requirements will be higher, the requirements are so high, now there is machinery and equipment in, processing workmanship is much faster, the quality of the problem, but also because now the assistance of machinery and equipment, in the quality, with the workmanship has improved, precision machining technology is also constantly updated, after the update of the benefits more obvious. Mechanical parts precision machining industry is currently developing rapidly, how to seize the opportunity in the current situation, it is important for all industry players to understand the development trend of our mechanical parts processing industry. The following is the chief engineer of our Rui Sheng Technology to introduce four points, a brief analysis of the future of China's mechanical parts processing industry or will present four major development trends:. First, the machine tool composite technology to further expand with the progress of CNC machine tool technology, composite machining technology is becoming increasingly mature, including milling - turning composite, turning and milling composite, turning - boring - drilling - gear processing and other composite, turning and grinding composite, forming composite processing, special composite processing, etc., the efficiency of precision machining greatly improved.   Second, the intelligent technology of CNC machine tools have new breakthroughs in the performance of the CNC system has been more reflected. Such as: automatic adjustment of interference anti-collision function, after the power failure, the workpiece automatically exit the safety zone power failure protection function, processing parts detection and automatic compensation learning function, intelligent enhance the function and quality of the machine tool. More five-axis linkage high-speed machining center was introduced. Third, the robot makes the flexible combination of higher efficiency robot and host of flexible combination is widely used, making the flexible line more flexible, further expand the function, flexible line to further shorten, higher efficiency. Robots and machining centers, milling machine tools, grinding machines, gear processing machine tools, tool grinding machines, electrical processing machine tools, saws, stamping machine tools, laser processing machine tools, water cutting machine tools and other forms of flexible units and flexible production lines have begun to apply. Fourth, precision mechanical parts processing technology has made new progress in CNC gold cutting machine tool processing accuracy has been upgraded from the original silk level to the current micron level, some varieties have reached 0.0μm or so. Ultra-precision CNC machine tools for micro cutting and grinding, precision can be stable to 0.0μm or so, shape accuracy up to 0.0'μm or so. The use of light, electricity, chemical and other energy sources of special processing accuracy can reach the nanometer level. Through the optimization of machine tool structure design, machine tool components of ultra-precision machining and precision assembly, the use of high-precision full dead cycle control and temperature, vibration and other dynamic error compensation technology, thus entering the era of sub-micron, nano-level ultra-precision machining. Functional components continue to improve the performance of functional components continue to high speed, high precision, high power and intelligent direction, and to achieve mature applications. Full digital AC servo motors and drives, high technology content of electric spindle, torque motor, linear motor, high-performance linear rolling components, high-precision spindle units and other functional components to promote the application, greatly improve the technical level of CNC machine tools.