Determination of upset ingot dimensions during computer-aided forging design under fuzzy goals

Abstract

The paper describes an algorithm for determining reasonable dimensions of an upset ingot during computer-aided design of shaft press-forging under fuzzy goals. Fuzzy goals related to product metal elaboration quality and the complexity of its manufacture are formulated. Objective values of a design parameter for each goal are determined. Membership functions for possible solutions corresponding to these goals and the rule of choosing the most reasonable solution are constructed. Two examples of solving the problem depending on the selected goals are given. The proposed algorithm allows one to choose the most reasonable solution from a set of feasible ones and reduces human participation in the computer-aided design process. The developed approach can be applied to solving other problems of press forging, such as choosing an ingot, determining the necessity of the billet upset operation, determining the cogged billet dimensions, etc.