介绍一个用上限单元(UBET)建立的轴对称模锻计算机辅助模拟系统(CAS)。用它对一水平非对称的锻件的成形过程进行正向模拟,即从原始毛坯到最终锻件的成形过程的模拟。本系统还建立有反向模拟程序,即从最终锻件到原始毛坯的假想退步过程的模拟,以便寻求最佳变形方式。理论模拟与实验进行了比较,得到令人满意的结果。 An axisymmetric die forging computer-aided simulation system (CAS) with a ceiling unit (UBET) is introduced. It is used to simulate the forming process of a horizontal asymmetric forging, that is, the forming process from the original blank to the final forging. The system also established a reverse simulation program, that is, from the final forgings to the original rough simulation of the process of retreat in order to find the best way to deformation. Theoretical simulations and experiments are compared to get satisfactory results.