다구찌법을 활용한 헤딩공정설계 최적화 연구 = A study on the cold heading process design optimization by taguchi method

다국어 초록 (Multilingual Abstract)

This paper describes the finite element analysis and die design change of cold heading punching process toincrease the cold forging tool life and reduce the tool wear and stress concentration. Through this study, the optimizationof punch tool design has been studied by an analysis of tool stress and wear distribution to improve the tool life. Plasticdeformation analysis was carried out in order to understand the cold heading process between tool and workpiece stressdistribution. Cold heading punch die design was set up to each process with different four types analysis progressing, thecold heading punch dies shapes with combination of point angle and punch edge corner radius shapes of cold forging dies,punch die material properties and frictional coefficient. The design parameters of point angle and corner radius of punchdie geometry, die material properties and frictional coefficient were selected to apply optimization with the DoE (design ofexperiment) and Taguchi method. DoE and Taguchi method was performed to optimize the cold heading punch die designparameters optimization for bolt head cold forging process, it was possible to expect an reduce the cold heading punch diewear to the 37 % compared with current using cold heading punch in the shop floor.