Multi-step belt negative angle forming tool

The invention discloses a multi-step negative angle forming tool which comprises an upper die holder (1) and a lower die holder (2), an upper insert is mounted at the bottom of the upper die holder (1), upper bending inserts (3) are mounted on two sides of the upper insert, a lower insert (16) is mounted at the top of the lower die holder (2), and two lower bending inserts (4) are arranged on two sides of the lower insert (16). Two-sequence bending and negative-angle bending can be integrated on the same tool, one-time forming is achieved, and automatic production is achieved. 本发明公开了一种多工步带负角成型工装，包括上模座(1)和下模座(2)，所述上模座(1)的底部安装有上镶块，所述上镶块的两侧安装有折弯上镶块(3)，所述下模座(2)的顶部安装有下镶块(16)，所述下镶块(16)的两侧设有两个折弯下镶块(4)。本发明能够在同一副工装上集成二道序弯曲和负角度折弯，一次成形到位，实现自动化生产。