weld holder

According to the forming theory of square-box part and the deformation characteristics of TWB under force, some main factors were analyzed, including blank holder force ( BHF), thickness difference, the mechanical properties of blank and the weld location.

根据盒形件的冲压成形理论，并结合拼焊板受力时的变形特点分析了影响拼焊板冲压成形的主要因素，即压边力、板厚差、板料力学性能和焊缝位置等。

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Increasing the proportion of thick sheet of the TWBs, using split blank holder, imposing constraint on the weld and setting draw beads can restrain the movement of weld effectively.

增大拼焊板板坯厚板侧所占的比例、采用分瓣压边圈、对焊缝施加约束、设置拉深筋等方法，能够有效地抑制焊缝的移动问题。

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