Why do die forgings keep inclination, fillet and piercing sk
作者：admin 来源：本站 发布时间：2019-03-04 01:07:45 浏览量：
Drawing die inclination: easy to remove forgings from the die chamber;
Round corner: Increase the strength of forgings, make the metal easy to fill the chamber during forging, avoid cracks at the inner corner of the forging die, slow down the wear at the outer corner of the forging die, so as to improve the service life of the forging die;
In the process of die forging, the through holes in the die forgings can not be forged directly, but can only be forged into blind holes. There is a certain thickness of metal layer in the middle, which is called piercing links. A thin layer of metal is left in the hole of the forging to be washed out at last. The penetration holes on forgings can not be penetrated because the punch and concave die can not be completely close to each other when hammering. A certain thickness of links must be left in the holes, just like the flying edge left by the outer part of the forgings at the parting surface. The thickness of the lining should be kept properly, too thin is easy to forge and the impact force is too large; too thick punching is difficult and easy to deform the forging. When designing forgings with inner holes, the shape and size of the connecting skin must be correctly selected. In general, when the aperture is larger than 30 mm, it is necessary to consider retaining punching links. According to the ratio of the depth and diameter of the cavity part, different types of skin can be made. The types of bark are flat-bottomed bark, oblique-bottomed bark, arch-bottomed bark, warehouse bark and concave pressing.(HongTengDa（HTD ）Forging）
