Effective Press Folding Line Processing as Deformation Induction for Adjusting Impact Energy Absorption

Press formed products have recently been applied widely in various structures. forming is a mass production method that used to manufacture many machine components such as automobiles, industrial machinery, and plants. However, there limit the degree of shape freedom can be applied, so measures against cracks, wrinkles, spring-back, etc., must taken development process. It well known it difficult apply economically case small-lot because its high capital investment. The previous report shows folding line processing by press / bending has freedom, requires little investment, expected for experiments prototypes, commercial from small production. This paper using V-shaped punch deformation induction based on impact crushing square steel tubes/ aluminum thin wall cylinders FEM results. To improve energy absorption performance event collision, notches uneven surfaces called beads crush boxes front side members automobile parts manufactured forming. bead role inducing during axial forming, addition difficulty die design/manufacturing, needs correct design after prototypes. very convenient effective adjust only setting lines arrangement, not along lines. box development.