Application of the Backward Tracing Scheme of Finite Element Method to Tailored Blank Design and Welding Line Movement in Sheet Metal Forming

두께가 다른 두 용접판재 성형에 있어서 블랭크 설계 및 용접선 이동에 대한 유한요소법의 역추적기법 적용

Tailor-welded blanks are used for forming of automobile structural skin components. The main objective of this study is to achieve weight and cost reduction in manufacturing of components. For successful application of tailor-welded blanks, design of initial welded blanks and prediction of the welding line movement are critical. The utilization of the backward tracing scheme of the finite element method shows to be desirable in design of initial welded blanks for net-shape production and in prediction of the welding line movement. First the design of the initial blank in forming of welded thick sheet with isotropy is tried, and it appears successful in obtaining a net-shape stamping product. Based on the first trial approach, the backward tracing scheme is applied to anisotropic tailored blanks. The welding line movement is also discussed.