工艺参数对杯形内啮合齿轮旋压成形影响的数值模拟研究

基于金属塑性变形原理和旋压工艺的特点,提出了杯形薄壁内啮合齿轮旋压成形技术,建立了齿轮旋压三维弹塑性有限元模型并进行了数值模拟,分析了齿轮旋压成形时各变形区不同方向应变分布和金属流动规律,定性分析了主要工艺参数对齿轮旋压成形的影响规律。结果表明,压下量对齿轮成形起关键作用,并对齿根减薄影响大于齿顶增厚的影响,进给比对齿轮成形影响不大,大的旋轮圆角半径有利于齿顶增厚。

Numerical simulation of influence of technological parameters on spinforming of proculiform inside engaged gear

A new spinforming technology for thin-walled proculiform inside engaged gear was Presented based on the principle of plastic deformation of metal and characteristic of spinning process. A 3D elastic-plastic finite element model for gear spinning was established and numerical simulation was applied to analyze the strain distribution and metal flow law of different directions in the deformation zone during the gear spinforming. The influence regularities of main technological parameters on the gear spinforming were qualitatively analyzed. The results indicate that the gauge reduction plays a key role on the gear forming, its effect on the thinning of the dedendum is larger than that on the thickening of the addendum; the feed ratio has nearly no effect on the gear forming; large comer radius is beneficial to the thickening of the addendum. The study provides theoretical reference for the improvement of productivity and the quality of the products.