双锥冲头反挤杯形件的主应力解

The Slab Solution for Biconical Punch for Backward Extrusion of Cup-like Piece

推导了双锥冲头的主应力解,分析了主应力解轴间应力表达式中各项的物理意义。并且与平直冲头的主应力解作了比较,指出平直冲头的主应力解是双锥冲头主应力解的特例。根据挤压力的计算值与实测值的比较,说明用本文推导的双锥冲头主应力解的结果计算反挤杯形件的挤压力可满足一般工程需要。

The slab-method solution for biconical punch is derived and the physical meaning different terms in the expression of the axial stress is discussed according to this solution. The comparison between the presented solution and the solution for the flat-straight punch is also made. It is pointed out that the latter is only the particular case of the former. based on the comparison between the theoretical values and experimental values,the presented results of biconical punch is suitable for engineering application in backward extrusion of cup-like pieces.