두께가 다른 두 용접관계 성형에 있어서 블랭크 설계 및 용접선 이동에 대한 유한요소법의 역추적 기법적용

Application of the Backward Tracing Scheme of Finite Element Method for the Tailored Blank Design and Welding Line Movement in Sheet Metal Forming with Two Different Thickness

Tailored-welded blanks are used for forming of automobile structural and skin components. Its main objective is to achieve weight and production cost reduction in manufacturing of the components. For successful application of tailored-welded blanks design of initial welded blanks and prediction of welding line movement are critical. Here 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 initial blank in forming of welded thick sheet with isotropy is tried and it appears successful in obtaining a net-shape stamping product. Based in the first approach the backward tracing scheme is applied to anisotropic tailored blank. The welding line movement is also discussed.