What makes come back press a technology, also call a metal to come back press figuration technology, the dot getting power that makes through rotating arrives by the line to the line by the dot face, give constant pressure to make metallic stuff is out of shape along this one direction in a certain direction at the same time shape with flow the technology of some appearance. Here, metallic stuff must have plasticity to be out of shape or performance of going from place to place, come back press figuration to differ to be out of shape with plasticity, it is collect plasticity is out of shape with metabolic of going from place to place complex process, what special need points out is, what we say come back pressing figuration technology is not onefold puissant come back press and common come back pressure, it is both union; Puissant come back press those who be used at body of abnormity of all sorts of canisters, cone to come back pressure shape the processing technique of housing, it is a kind of older mature method and craft, also make boil control a standard. In mechanical product how managing raw material can improve product quality however, the weight that reduces a product can prolong service life however, the production cost that reduces a product and the sources of energy use up can reducing treatment man-hour however is people attention all the time. For example "V" leather belt annulus (appellative "V" belt annulus) it is one of mechanical transmission spare partses with very extensive use, if can shape by armor plate,have important sense. Ban makes leather belt annulus take round of photograph to compare with traditional casting iron sheet, but managing raw material 70 ％ above. By drawing of classics of metallic Ban material- - come back the Ban that presses figuration is made come back pressing leather belt annulus is newest first-rate takes round of configuration. This kind of belt annulus is had not only on appraise advantage, and without environmental free from contamination, wait for the application in a variety of mechanical products in machine of car, tractor, mower, pneumatics especially extensive. Introduce steel Ban semifinished product in appropriative leather belt annulus comes back make semifinished product arises to arrive by the dot on press bed line, be out of shape to the plasticity of the face by the line and make. Come back press belt annulus to have 3 kinds of basic forms commonly: Fold type is taken annulus, cleavage type is taken annulus and boil press type much V belt annulus (also say much wedge takes round of) . Come back the good point that approachs belt annulus and casting iron sheet to take round of photograph to compare is to use come back press craft to be made () of the treatment that do not have bits, structure material of light, province, moment of inertia is consequently small, it is makings of a kind of section, energy-saving new product. Manufacturing efficiency is tall (minutely treatment 2 ～ 4) , balance performance is good, need not balance processing commonly. Because material streamline is not cut off, exterior production is cold make sclerosis, constituent density rises, make the intensity of round of groove surface and hardness rise, and dimension precision is tall, v-belt and annulus slippery difference of groove is little, leather belt life is long. Bed of press of CDC-S60 vertical numerical control coming back is taken annulus come back pressing figuration type craft and facility is an advanced technology, belt annulus comes back pressure fold style was acquired on craft belt annulus, cleavage type is taken annulus, boil control type much V area annulus take a series of round of scientific research gain with combined-type, in theory and practice two respects were solved come back all sorts of technology difficult problem in pressing figuration, use successfully at production. But with Germany come back press technical photograph to compare, our country still needs hard to chase after dare, because, a lot of our country products still need an import, especially the certain component in the car. Come back pressing press of numerical control of series of CDC-S of product brief introduction coming back is production comes back the special device that controls leather belt annulus. Come back press leather belt annulus as product of a kind of new technology, use already extensively in car engine, if electric machinery annulus, water pump annulus, air conditioning annulus is mixed fan annulus. According to leather belt annulus groove can divide 3 kinds big with treatment craft: Cleavage annulus, fold annulus and much wedge annulus. Sketch map is as follows: Because this comes back big kinds 3,the structural characteristic that presses leather belt annulus differs, its treatment technology is not same also. More the material ply that wedge annulus place chooses is 2 ～ 6mm, all be 3mm commonly. Use pull make semifinished product greatly with punch method, figuration is machined on press coming back. Because tooth form is to be in material wall is large the generation metal flow that goes up to make with extruding means and plasticity are out of shape and form, influence product is so final the element of quality is very much, include material of parameter of fluctuation model, spinning roller, craft, material to wait character. Be analysed in the following craft and can introduce in detail in mould design. The material ply that fold annulus place chooses is 1. 5 ～ 2.
5mm, also be to use pull make semifinished product greatly with punch method, machine figuration on press coming back. Because fold annulus did not produce metallic flow in figuration process, compare on craft so simple, the factor that affects quality is not much. Cleavage annulus material ply is 2 ～ 4mm, use commonly strong cut into parts make semifinished product, spinning roller is used on press coming back from the plastics after the 1/2 place of material ply cleavages figuration. Because its treatment craft is simpler also, the factor that affects quality is not much also, the mainest is the flatness effect that suffers semifinished product itself. The punch mould demand that reduces to rushing accordingly is higher. CNC Milling
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