Fine metal stamping processing

Micro-metal stamping processing The micro-processing we are talking about now refers to the processing technology of micro-parts. The definition of micro-parts usually refers to at least a dimension of less than 100μm in one direction, which has incomparable application prospects than conventional manufacturing technology. The micro-robots, micro-aircraft, micro-satellites, satellite gyros, micro-pumps, micro-instruments, micro-sensors, integrated circuits, etc. made with this technology have excellent applications in many fields of modern science and technology. New expansion and breakthroughs will undoubtedly have a far-reaching impact on my country's future science and technology and national defense, and the promotion of world science and technology development is also incalculable. For example, micro-robots can perform complex operations such as optical fiber wiring, bonding, and docking, and inspection of small pipes and circuits, as well as integrated chip production, assembly, etc. It is not difficult to see the attractive charm of micro-processing. Developed industrial countries attach great importance to the research and development of microfabrication and have invested a lot of manpower, material and financial resources. Some well-known universities and companies with vision have also joined this rank. my country has also done a lot of research work in this area. It is reasonable to think that in the 21st century, micro-processing will definitely bring huge changes and profound impacts to the entire world, just like microelectronics technology. For the mold industry, due to the miniaturization of stamping parts and the continuous improvement of precision requirements, higher requirements are put forward for mold technology. The reason is that micro-parts are more difficult to form than traditional parts. The reasons are: ①The smaller the part, the rapid increase in surface area to volume ratio; ②The adhesion between the workpiece and the tool, surface tension, etc., increase significantly; ③Grain The influence of scale is significant, and it is no longer an isotropic uniform continuum; ④It is relatively difficult to store lubricant on the surface of the workpiece. An important aspect of micro-stamping is punching small holes. For example, there are many small holes that need to be punched in micro-machines and micro-instruments. Therefore, the study of small hole punching should be an extremely important issue in micro punching. The research on punching small holes focuses on: first, how to reduce the size of the punch; second, how to increase the strength and rigidity of the micro punch (in addition to the materials and processing technology involved in this aspect, the most commonly used is to increase the size of the punch Guiding and protection of punches, etc.). Although there are still many issues that need to be studied in punching small holes, many gratifying results have been achieved. Some data indicate that the micro-stamping machine tool developed abroad is 111mm long, 62mm wide and 170mm high. It is equipped with an AC servo motor and can generate a pressure of 3KN. The press machine is equipped with a continuous stamping die, which can realize punching and bending. The University of Tokyo in Japan used a gastric WFDG technology to produce punches and dies for micro-stamping. Using this die for micro-stamping, non-circular cross-section micro-holes with a width of 40 μm can be punched on a 50 μm polyamide plastic plate. Tsinghua University has made a good start in the deep drawing of ultra-thin metal cylindrical parts. The key to ultra-thin wall drawing technology is to have a high-precision forming machine. In the forming of ultra-thin metal cylinders with a wall thickness of 0.001mm~0.1mm, they developed a precision forming test machine with microcomputer control function, so that the centering accuracy of the punch and the die during the processing reached 1μm. This effectively solves the problem of wrinkles and fractures in ultra-thin-wall deep drawing and cannot be operated normally. Use this machine to perform a series of thinning and deep drawing of brass and pure aluminum with an initial wall thickness of 03mm, and process a series of ultra-thin-walled metal cylinders with an inner diameter of 16mm, a wall thickness of 0.015mm~0.08mm, and a length of 30mm. . After testing, the thickness difference of the formed ultra-thin-walled cylinder is less than 2μm, and the surface roughness is 30.057μm, which greatly improves the accuracy of the ultra-thin-walled cylinder instrumentation and correspondingly improves the installation of the instrumentation machine. performance. Previous post: Hardness testing of metal stamping parts