유한요소해석을 이용한 세장비가 큰 직사각컵 다단계 성형공정의 금형설계 : Part I.금형설계

Abstract

Tool design is introduced in a multi-stage rectangular cup drawing process with the large aspect ratio. Finite element simulation is carried out to investigate deformation mechanisms with the initial tool design. The analysis reveals that the difference of the drawing ratio and the irregular contact condition produces non-uniform metal flow to cause wrinkling and severe extension. For remedy, the modification guideline is proposed in the design of the tool and process. Analysis results confirm that the modified tool design riot only improves the quality of a deep-drawn product but also reduces the possibility of failure.