Process analysis and prediction of die strength of condenser tube with 12 holes in hot extrusion

12홀 컨덴서 튜브의 열간 압출 공정해석 및 금형의 강도예측

Condenser tube has been used as a component of heat exchanger in automobile and air conditioning apparatus. In this paper, porthole die extrusion that is advantageous to form long hollow section tube is analyzed by direct extrusion of condenser tube with 12 holes. A study on extrusion process is performed through the 3D FE simulation at non-steady state and extrusion experiments. Especially, weldability, extrusion load and die defects were estimated try FE-simulation. This study present the redesigned die of direct extrusion in consideration of the results obtained from FE-analysis.