关键词: 冲压, 拼焊板, 焊缝线, 偏移

Abstract: Deviations between the design weld lines and the formed weld lines were inevitable in the stamping processes of TWB with different thicknesses due to the plastic deformations, so a method to shrink the deviations by adjusting the weld lines on the blanks in advance was put forward. Firstly, design weld lines were transformed into a integrated curves by extending to the binder or the filled holes according to the process supplement surfaces, then the integrated ones were discretized into a series of points to establish the position relationship of each discrete point between the three of the designed weld lines, the blank lines and the formed lines, then the deviations of each corresponding points between the formed weld line and the design lines were calculated through stamping simulations, the ideal weld curve on blank could be acquired through adjusting the blank discrete point according to the deviations calculated before. Based on these, the weld curves of blanks would be transformed into a straight line, which would be rotated and moved properly according to stamping simulation results to further shrink the deviations between the formed weld line and the design lines. The stamping test results show that the method is effective and reveals the main sources of deviations are coming from straight weld lines of the blank.

Key words: stamping, tailor-welded blank(TWB), weld line, deviation[HJ]