An Experimental Study on the Springback Characteristics of Sheet Metals

금속판재(金屬板材)의 스프링백 특성(特性)에 관한 실험적(實驗的) 연구(硏究)

The springback characteristics of some sheet metals such as commercially pure aluminium, mild steel and stainless steel in a forming process are investigated experimentally. Three geometrical parameters for evaluating springback in the plane-strain draw-bending, which was a benchmark model of NUMISHEET '93 conference, are defined. The measurement of the springback parameters is carried out accurately and easily by using an image analysis system developed in this study. The effects of the blank holding pressure and tensile strength of the material on the springback are also examined.