성형잔류응역에 의한 박판구조물의 변형에 대한 연구

Study on the Deformation of a Sheet Metal structure due to Stamping Residual Stresses

Rectangular frames of thin sheet metals are press formed during their manufacture. The multistage process includes blanking, stamping, bending, and trimming. After stamping the sheet is subjected to warping and twisting due to residual stresses. The twist is not desirable since it affects the subsequent assembly processes. Study has been performed to predict the twist.