摩托车发动机托架级进模设计

Design of Progressive Die for Motorcycle Engine Bracket

摩托车发动机支架是典型的复合弯曲件,孔系的位置精度要求高。原厂采用单工序模生产,采用先弯曲后冲孔的工艺,一次将位置精度要求高的孔冲出来。采用单工序模生产,虽然孔的位置精度有保证,但生产效率低。笔者分析了该制件采用级进模生产的难点,提出了相应的对策。采用切断、弯曲和侧冲孔复合工步,解决工件在工步间的传递问题。浮动凹模采用滚柱和弹簧联合支承,有效地解决了工件成形时浮动凹模支承力不足的问题,保证了工件先成形后侧冲孔的冲压顺序。改善前,发动机托架生产需用3副模具。改善后只需用1套级进模生产,生产效率提高了3倍,制件精度符合要求,生产质量稳定。

The motorcycle engine bracket is a typical composite bending part,and the positionprecision of the hole is high. The original factory uses a single process mode production,the useof the first bending punching process,once the position accuracy requirements of Kong Chongout. Single operation mode is used,although the position accuracy of the hole is guaranteed,butthe production efficiency is low. This paper analyzes the difficulties in the production of the partsusing progressive die,and puts forward the corresponding countermeasures.Using cutting, bendingand side punching composite work steps,to solve the problem in the work of the workpiece. Floatingconcave mould adopts a roller and a spring joint bearing,effectively solve the workpiece formingfloating die supporting force insufficient problem. Using this structure to ensure that thesequence of the workpiece is the first bending forming,and then from the side piercing. 3 sets ofmolds for the production of engine bracket before the improvement of the mould. Afterimprovement,only 1 sets of progressive die production. Improve the production efficiency by 3times,the accuracy of the parts is in line with the requirements of the production quality.