限位凸轮精冲模设计吉林工业大学（吉林长春１３００２５）杨慎华邓春萍修士田１工艺分析图１是１０４６型轻型车前门下铰链总成上的一个关键零件，材料为２０钢，料厚为４．５ｍｍ。由于该零件形状复杂，尺寸精度与表面粗糙度均要求较高，若采用普通方法加工则需如下工艺... Limit cam precision die design Jilin University of Technology (Changchun, Jilin 130025) Yang Shenhua Deng Chunping monk Tian 1 Process Analysis Figure 1 is a 1046 light car front door hinge assembly on a key component, the material is 20 steel, material thickness 4.5mm . Due to the complicated shape of the part, the dimensional accuracy and the surface roughness are all required to be high. If the common method is used, the following process is required ...