1989 年 55 巻 1 号 p. 87-92
The die design for cold forging is very important, because the die material is exposed to heavy stress. In order to make precise cold forged products, the die for cold forging must be designed in due consideration of deformation by working pressure. But a lot of cost can not be payed to die design, therefore low cost analysis system for cold forging die has been developed by means of personal computer and BEM. Although personal computer is used, the maximum number of boundary elements is 250, and in usual case CPU time is within 30 minutes. In order to make this system practically useful, a lot of automatic data generation programs and an evaluation program of internal working pressure are added.