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一般的冲裁模设计时,凸模的强度都不必考虑。但冲制小孔时,由于凸模细而长,除了根据冲件的抗剪强度、料厚、冲孔直径或周长进行计算凸模抗压强度,以便选取凸模材料外,还必须对凸模的长度进行抗纵弯稳定性校核和刚度校核,以确定凸模的自由长度是否具有足够的承受冲压过程中最大的轴向力和偏载力。如图1所示零件,材料为黄铜H62,厚度0.2mm,其
When the general blanking die design, punch strength do not have to consider. However, when punching holes, due to the thin and long punch, in addition to the punch according to the shear strength, thickness, punching diameter or perimeter to calculate the compressive strength of the punch in order to select the punch material, but also must The length of the punch is subjected to longitudinal bending stability check and stiffness check to determine whether the free length of the punch is sufficient to withstand the maximum axial and offset forces during stamping. Parts shown in Figure 1, the material is brass H62, the thickness of 0.2mm, its