대형 단조품 환봉 코깅 공정의 기공 압착 거동 예측에 관한 연구

A Study on the Prediction of Void Closure in the Cogging Process of a Large Round Bar

The predictive equation of void-closure was developed to evaluate void crush ratio with respect to the process variables in the cogging process of a large round bar. The comprehensive finite element analysis with the process variables such as reduction ratio and die width ratio was carried out. The predictive equation of void-closure for cogging process was established on the basis of the regression analysis with the extensive FE analysis results and verified by comparing the predicted results with FEA results with various forging passes.