钣料压延数值解

本文采用能量条件的硬化模式,考虑到钣料的厚向异性,导出了压延凸缘区和凹模圆角区数值解所需的理论方程以及压延拉伸失稳条件的数学表达式和压延拉伸失稳临界载荷计算公式,在此基础上,利用电子计算机求解了四种钣料(TA1—M、LY12—M、LF2—M、20钢)的压延载荷和极限压延系数。理论和实验结果取得了很好的一致性。

The Numerical Solution for Cup-Drawing of Sheet Metal

In this paper,we assume that the work-hardening characteristic is determined by the plastic work and we consider the effect of normal anisotropy r of sheet metal,the theoretical equations of the numerical solution in the flange region and die profile radius,the mathematical expressions of biaxial tension instability conditions and the equations of instability loads in the cup-drawing of sheet metal are deduced,in order to obtain the values of Limiting Drawing Coefficients.Using an electric computer the theoretical Values are obtained for four kinds of sheet metal (TA1-M,LY12-M,20 steel).Experimental studies show that the theoretical values of drawing loads and Limiting Drawing Coefficients are in agreement with the experimental results.