Process and application of forgings
The amount of metal left on the forging for cutting. The purpose of its cutting processing is to make the part size accuracy and surface roughness to meet the requirements. In the forging process, due to underpressure, forging mold wear, upper and lower mold misshift, forging oxidation and decarbonization, cooling shrinkage and other reasons, the size of the forging is difficult to be accurate, the shape may also occur warping crooked, surface roughness can not meet the requirements and other defects. Therefore, in the production of forgings, a layer of metal should be left on the surface of the forging billet, to be cut off when the later machining, to ensure its processing quality. For some important bearing parts requiring 100% sampling test or for inspection and machining and positioning, there is also excess metal, which is called allowance. Forgings refer to the required shape or appropriate compression force of the metal through plastic deformation. For example, ancient mass-made iron objects can be called as forgings, which is a piece of metal through pressure into the way you want. Exquisite granular structures were built through the forging process, and the physical properties of the metal were improved. In the real use of parts, a correct design can make the particles flow in the direction of the main pressure, and the forging can not only shape it out, it requires that each piece is consistent, there is no porous, excess space and other defects. Automobile forgings are mainly used in the automobile manufacturing, which is an important factor related to the life of the automobile. The development of the automobile industry drives the development of its related industries, such as the gasoline, the automobile urea, etc., and the automobile forgings. It is not so much that the development of cars has driven the development of forgings.
