云母片冲压工艺及模具设计外文翻译.doc

Overview of stamping die Stamping die - in the cold stamping, material (metal or non-metallic) processed into parts (or semi-finished) a special process equipment, called cold stamping die (commonly known as cold die). Punching - is at room temperature, the use of a mold mounted on the press to exert pressure on the material, to produce a separation or plastic deformation, thereby obtaining a pressure processing method of the required parts. Stamping die in the form of many, the general categories according to the following main features: 1. Classification under the craft nature(1) Die along the closed or open contour the material are derived from mold. If blanking die, punch die, cut off the mold, cut mode, cutting mode, split mode, etc. (2) bending mode to blank or blank sheet along a straight line (curved line) to bend, deform, and thus obtain a certain angle and shape of the workpiece in the mold. (3) The drawing die is made of the blank sheet opening hollow, or hollow pieces of further changes to the shape and size of the mold. (4) Die rough or semi-finished workpiece is convex according to plan, direct copy the shape of the die shape, the material itself, generate only local plastic deformation of the mold. Such as the bulging mode, reducing the die, expansion die, forming die rolling, flanging mold, plastic mold. 2. According to the process combination classification (1) single process model in a press tour, just completed a die stamping process. (2) composite model is only one station, in a press tour, at the same station at the same time to complete more than two or two die stamping process. (3) Progressive Die (also known as the modulus of continuity) in the feeding direction, rough, with two or more of the station, at the press of a visit, work in different places on the completion of two or two successive Road over stamping die process. The rushing Die called the cold stamping die. Cold stamping die used in cold stamping die mold industry and its accessories required for the preparation of high-performance structural ceramic materials, high-performance ceramic mold and its accessories material zirconium oxide, yttrium oxide powder and aluminum, praseodymium elements,the preparation process is zirconia solution, a solution of yttrium oxide, praseodymium oxide solution, alumina sol by mixing dubbed the mother liquor, was added dropwise ammonium bicarbonate, the synthesis of the raw materials required by the mold and its accessories ceramic material by co-precipitation method, and the reaction the resulting precipitate was separated by filtration, drying, calcining high-performance ceramic mold and its accessories material ultrafine powder, and then after molding, sintering, finishing, they get a high-performance ceramic mold and its accessories material.An advantage of the present invention is a long service life of the present invention is made of cold stamping mold and its accessories, molds and its accessories stampings bonding phenomenon does not appear in the stamping process, stamping parts surface is smooth, no glitches, can completely replace the traditional high-speed steel, tungsten steel. Cold stamping die used in cold stamping die mold industry and its accessories required for the preparation of high-performance structural ceramic materials, high-performance ceramic mold and its accessories material zirconium oxide, yttrium oxide powder and aluminum, praseodymium elements,the preparation process is zirconia solution, a solution of yttrium oxide, praseodymium oxide solution, alumina sol by mixing dubbed the mother liquor, was added dropwise ammonium bicarbonate, the synthesis of the raw materials required by the mold and its accessories ceramic material by co-precipitation method, and the reaction the resulting precipitate was separated by filtration, drying, calcining high-performance ceramic mold and its accessories material ultrafine powder, and then after molding, sintering, finishing, they get a high-performance ceramic mold and its accessories material.An advantage of the present invention is a long service life of the present invention is made of cold stamping mold and its accessories, molds and its accessories stampings bonding phenomenon does not appear in the stamping process, stamping parts surface is smooth, no glitches, can completely replace the traditional high-speed steel, tungsten steel.Die with major parts Die stamping and processing is main process equipment, stamping parts is rely on, under the relative movement of the mold to complete. Processing because of lower die, constantly division, if the fingers continue to enter or remain in the mold closed area, will bring the serious threat to their personal security. (A) of the mold main parts, function and safety requirements 1. Working parts is a direct punch to blank forming the working parts, therefore, it is the key to mold parts. Punch not only sophisticated and complex, it should meet the following requirements: (1) be of sufficient strength, can not be broken or destroyed during stamping. (2) should be appropriate to its material and heat treatment requirements, to prevent too high hardness and brittle fracture. 2. Positioning parts positioning part is to determine the location of the parts installed blank, there are pins (board), gauge pin (plate), lead is sold, guide plate, knife set from the side, side pressure etc. Design should be considered when positioning parts easy to operate and should not have had orientation, location to facilitate observation, preferably in the forward position, contouring to correct the pin location and positioning. 3. Binder, unloading and discharging parts binder components are blank holder, binder board. Clamping ring for drawing blank holder force of pressurized, thereby preventing blank in the tangential direction under the action of pressure arch and formation of wrinkles. The pressure plate role is to prevent the billet moving and jumping. Ejector, stripper plate s role is to facilitate a and cleaning up waste. They consist of spring, rubber and equipment on the air cushion rod support, can move from top to bottom, top design should have sufficient ejecting force, motion to limit. Stripper plate should be minimized the closed region or in the operating position empty slot milling. Exposure of the stripper plate around should be equipped with protective plate, preventing the finger or foreign bodies into the exposed surface to be blunt, edges and corners. 4.Guide elements guide pillar and the guide sleeve is one of the most widely used guide parts Its role is to ensure that the punch and die stamping in the work with a precise fit clearance. Therefore, a guide column, a guide sleeve gap should be less than the blanking clearance. Guide pillar in the lower die seat, to ensure the stroke of the lower dead point, the upper end of the guide column template above the top surface of a minimum of 5 to 10 mm. Guide pillar should be arranged in away from the module and the pressure plate part, so that the operator arm over the guide column without feeding and taking 5. Supporting and clamping the upper and lower parts which includes templates, die handle, fixed plate punch, plate, stopper, etc. Up and down the template is the basis of the cold die parts, other parts are respectively fixed at the top. Template plane size, especially around the direction to be compatible with the workpiece, too large or too small are not conducive to action. Some molds (blanking, punching type mold) to the pieces of convenience, be set up under the mold plate. At this time the best and the template plate connected between the screw, the two plate thickness should be absolutely equal. Plate spacing out the pieces to be able to prevail, not too much, so as not to break the template. 6. Fastening parts which includes screws, nuts, springs, pins, washers, etc., are generally used standard parts. Die more with the amount of standard parts, design choice and flexibility should be tightened to ensure the top out of the need to avoid exposure to the surface fastener operating position, the staff and impede operation to prevent bumps. The development of die Since the reform and opening up, with the rapid development of national economy, the market of cold stamping mold growing demand. In recent years, cold punching mold industry has been around for 15% growth rate of rapid development, die industrial enterprise ownership composition also produced tremendous change, besides factory of state-owned and professional mold, collective, joint venture, owned and private development has been rapid. Along with the development and internationalization pace is accelerated ceaselessly, market competition intensifies, more and more people have realized that product quality, cost and new product development ability. And die manufacturing is the most basic element of the chain, cold stamping die manufacturing technology has become the measure of a countrys level of manufacturing industry an important sign, which to a great extent decides the enterprise survival space. Die with enterprises to increase in recent years many technological advances for investment, technological progress will be seen as an important driving force for enterprise development. Some domestic enterprises have popularized the two-dimensional mold CAD, and gradually began to use UG, Pro / Engineer, I-DEAS, Euclid-IS and other international common software, individual manufacturers have also introduced Moldflow, C-Flow, DYNAFORM, Optris and MAGMASOFT etc. CAE software, and successfully applied in stamping die design. A car cover mold as the representative of a large stamping die manufacturing technology has made great progress, Dongfeng Motor Corporation mold factory, mold manufacturers such as FAW mold center has been able to produce some car cover mold. In addition, many research institutions and universities to carry out technology research and development of mold. After years of effort, in the mold CAD / CAE / CAM technology has made remarkable progress; in improving quality and reducing mold die design and manufacturing cycle, and so contributed. Although China die industry in the past 10 years obtained attract peoples attention to the development of many aspects, but compare with photograph of industrial developed country to still have bigger difference. For example, precision machining equipment in the processing of cold stamping die processing equipment in the proportion of relatively low; CAD/CAE/CAM technology popularity rate is not high; many advanced mold technology application is not wide enough and so on, resulting in a considerable part of a large, precision, complex and long life of cold punching mold depends on import. With the continuous progress of science and technology, modern industrial production of increasingly complex and diverse, product performance and quality is ever increasing, thus the cold stamping technology put forward higher requirements. In order to adapt to the cold stamping technology industry needs, cold stamping technology itself also in innovation and development. cold stamping technology idea is to improve and expand as much as possible the advantages of the cold stamping process, to overcome its shortcomings. in the cold stamping technology development, should note the following aspects: (1) Cold stamping technology development process should correctly determine the process parameters and Die with the shape and size of the part of the work, to improve the quality of stamping parts, shorten the cycle of new product trial, should strengthen stamping theoretical study based on the stamping theory reach can play a guiding role in the actual production abroad has begun to gradually establish a close connection with the actual production of advanced process analysis calculation method. elastic-plastic finite element method for stress-strain analysis and computer simulation of automobile covering parts forming process to predict the possibility of forming a craft program on parts and problems that may arise. (2) to accelerate product replacement, mold design to overcome the shortcomings of a long cycle. Should vigorously carry out computer-aided design and manufacture of molds (CAD / CAM) Research. In my country, paying particular attention to strengthening the multi-position progressive die CAD / CAM Technology. (3) to meet the needs of mass production, and reduce labor intensity. Should strengthen cold stamping of mechanized and automated, so that the average, small pieces of high-speed presses in a multi-position progressive die production, production reached a high degree of automation to further improve stamping productivity. (4) expand the scope of application of cold stamping production. So cold pressing both suitable for mass production, but also for small batch production; both the general accuracy of product production, but also can produce precision parts. Should pay attention to development such as fine blanking (especially thick material fine blanking), forming high-energy, soft mold forming, pressure and processing new superplastic forming process, but also promote the easy mode (soft mode and the low melting point alloy mold), Universal Hybrid model, the use of CNC punch press and other equipment. In addition, the performance improvement of sheet metal stamping, mold new material, die development of new processing methods should be further strengthened. Die with life and Countermeasures Die with life is to calculate the number of artifacts punching. Many factors affect Die life. Mold structure design, manufacture mold punch and die materials used, the quality of heat treatment and surface hardening of the mold and die manufacturing precision parts and the cold stamping material selection. In addition, there are die installation, adjustment, use, and maintenance. 1. Mold Design Life (1) Layout design of layout methods and take the boundary value a great impact on the die life, too small to take the boundary value, often causing rapid wear and convex mold, die bite wounds on the. Starting from material savings, take the boundary value smaller the better, but take the edge is less than some value, the cut surface of the mold and the quality of life adversely. There will be left behind in the blanking die Q-gap were to produce spare parts glitch, or even damage the die edge, reduce die life. Therefore, consider increasing the material utilization of the same time, parts must yield, quality and life expectancy to determine the layout methods and take the boundary. (2) die structure prone to stress concentration on the cracking of the die structure, composite structure can be used or mosaic structure, and prestressed structure to enhance the mold life. (3) Effect of clearance when space over an hour, compression stakes, the frictional force is increased, increasing the side wear, increased wear, blanking discharging and pushing parts, materials and convex, concave die between the friction will cause the edge side wear than the end face of the grinding greatly, but also easy to cause the convex, concave die the temperature is high, the metal fragments adsorbed on the edge side, forming a metal aneurysm, the convex, concave die chipping or cracking phenomenon. Therefore, small clearance on the life of die is very adverse. The gap is too large, will increase the convex die and the concave die edge concentration stress, the stress increased dramatically, so the blade edge soon yield deformation and lose the edge. It also increased the blanking force, so that the blade edge faster wear, reduce the mold life. But in order to reduce the convex, concave die wear, prolong the service life of the die, in ensuring the quality of blanking parts under the premise, when designing appropriate use the bigger gap is very necessary. (4) Die-oriented structure of the life of a reliable guide for the working parts reduce wear, prevent male and female die bite wound is very effective. In particular, non-small-Q gap Q gap or Die, compound die and multi-position progressive die even more important. To improve the die life, must be based on processes and the demand of precision, the correct choice-oriented form and orientation accuracy, the choice should be higher than the accuracy-oriented convex, concave mold with precision. (5) the impact of cold stamping materials, cold stamping materials selected should meet the design requirements of workpieces and stamping process requirements, or easy to mold damage and reduce mold life. Poor surface quality of cold stamping, punching, cracking when the workpiece is also easy to scratch mold. Bad cold stamping plastic materials, deformation is small, easy to press when the workpiece rupture, but also easy to scratch mold. In addition, the material thickness tolerances shall comply with national standards. Die because of a certain thickness of material suitable for forming, bending, flanging, drawing die of the male and female die structure gap is directly determined by the thickness of the material. Therefore, uneven thickness, will result in waste generation and mold damage. 2. The influence of the mold material on the die life Mold material impact on the life of the die mold material properties, chemical composition, organizational structure, hardness and metallurgical quality comprehensive reflection. Among them, the most obvious of material properties and heat treatment quality impacts. The nature of the mold material is a big influence on the die life. As will be the same kind of the workpiece, the use of different mold materials do the bending test, the test results: 9Mn2V material, its life is 50,000 times; with Crl2MoV