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프리폼 형상이 딮드로잉 제품의 코너충진 정도에 미치는 영향
박준홍(Joon Hong Park),김승규(Seung Kyu Kim),백승걸(Seung Kul Baek),박영철(Young Chul Park) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
In deep drawing processes, the wall thickness in the sheet metal forming always decreases which causes lots of dimension problems. In this paper, the decrease in wall thickness at the corner was minimized through the newly developed preform shape and it was found that the wall thickness increased in a certain degree. The calculated distribution of the wall thickness after forming was in good agreement with the experimental results. The effects of the corner radius and the preform shape on the decrease in wall thickness at the inner corner were examined by both FEM simulation and experiment.