Minimization of Die Wear Rate by Using Multi-Objective Optimization in Three-Dimensional Extrusion Processes

3차원 압출 공정에서 다목적 최적화 기법을 이용한 금형 마모율의 최소화

A shape optimization of flow guide is accomplished to minimize the wear rate of die in three-dimensional flat-die extrusion processes. In order to achieve the balanced flow and the uniformed distribution of the effective strain during the extrusion, a multi-objective optimization is implemented. During the process of optimization formulation, the flow balance and the deviation of strain is considered as constrained conditions. The proposed approach is applied to an extrusion of H section. Through the optimization, it has been confirmed that the wear rate of die can be minimized satisfying the constraint.