底门折页(图1)是我厂生产的货车上的一个零件,成批生产,对锻造的质量要求很高,如扳部不平,头部有弯度,都会影响它的,装配使用;所以这种锻件在锻好后都得用样板检验。过去,锻件的质量往往达不到要求,返修率在20％以上。我同肖永坤同志研究设计出一付垫模,把压弯,校正、克头等工序合并成一道,这样,锻件的质量不但可以100％ The bottom door hinge (Figure 1) is a part of the truck produced by our factory. It is mass-produced and has high requirements on the quality of forging. For example, the unevenness of the wrench and the curvature of the head will affect its assembly and use; therefore, This kind of forgings have to use the model test after forging. In the past, the quality of forgings often failed to meet the requirements, repair rate of 20% or more. I studied with Comrade Xiaoyong Kun to design a pad pattern, the bending, correction, g head and other processes into one, so that the quality of forgings can not only 100%