According to the movement of blank, forging can be divided into free forging, upsetting 스포츠토토사이트 추천 extrusion, die forging, closed die forging, closed upset.

1, free forging. Use impact or pressure to make metal on the up 스포츠토토사이트 추천 down two to produce deformation between iron (anvil block) to obtain the required forgings, there are mainly manual forging 스포츠토토사이트 추천 mechanical forging two kinds.

2, die forging. Die forging 스포츠토토사이트 추천 divided into open die forging 스포츠토토사이트 추천 closed die forging. Metal blank in a certain shape in the bore of the forging die forging compression deformation, can divide again for cold heading, roll forging, the radial forging, extrusion 스포츠토토사이트 추천 so on.

3, closed die forging 스포츠토토사이트 추천 closed upset because there is no flash, material utilization ratio is high. With a process or a few process can complete complex forging finishing. Since there is no flash, forging stress area is reduced, the required load is also reduced. However, we should pay attention to not make blank completely is restricted, so we will strictly control the volume, control the relative position of forging die 스포츠토토사이트 추천 measure of forgings, effort to reduce the wear 스포츠토토사이트 추천 tear of forging die