双金属板渐进成形底部鼓包和侧壁鼓凸研究

为了从工艺上提高双金属板成形精度,通过实验结合有限元分析的方法探究了不同工艺参数对成形精度的影响,研究表明:成形角度和成形深度分别是影响底部精度和侧壁精度的最关键因素,当成形角度由30°增大至60°时,底部鼓包高度降低29%,侧壁鼓凸量增加18.5%;当工具头直径由10 mm增大至20 mm时,底部鼓包高度下降13%,侧壁鼓凸量下降16%;当下压量由0.5 mm减小至0.2 mm时,底部鼓包高度下降24%,侧壁鼓凸量增加18.3%;最后优选了合理的工艺参数,使得底面鼓包高度下降49%,侧壁鼓凸量下降41%。

Research on Bottom Bulge and Sidewall Bulge of Bimetal Plate in Incremental Forming

The bimetal plate is widely used because of its good performance. But the development of single point incremental forming is hindered by the processing defects that affect the accuracy and forming performance of parts such as bottom bulging and side wall bulging. The variations of forming accuracy of the single point incremental forming have been analyzed by using a combination of experiment method and finite element method. The results show that the bottom bulge height and the side wall bulging are most affected by the forming angle and forming depth respectively. These results indicate that the height of the bottom bulge is reduced by 29% and the side wall bulging is increased by 18.5% when the forming angle increases from 30°to 60°. The height of the bottom bulge is decreased by 13% and the side wall bulging is decreased by 16% when the tool head diameter is increased from 10mm to 20mm. The height of the bottom bulge is decreased by 24% and the side wall bulging is increased by 18.3% when the step down size from 0.2mm to 0.5mm. Finally, reasonable process parameters were optimized, so that the bottom bulge height decreased by 49%, and the side wall bulge decreased by 41%.