锻压技术

杯形内啮合齿轮旋压成形的数值模拟

英文标题：Spin-forming numerical simulation of cup-shaped inner meshing gear

作者：董洪波王高潮

关键词：旋压内啮合齿轮数值模拟

分类号：TG376

出版年,卷(期):页码：2009,34(4):32-34

摘要：

采用强力旋压设备加工杯形内齿轮,由于芯模外表面呈阶梯状,且使用圆盘形坯料一次成形,工艺难度较大,产品出现了裂纹、内齿充填不足等缺陷。采用三维弹塑性有限元法模拟了变形过程,定性地分析了产品缺陷产生的原因。结果表明,在内齿根部受到旋轮的作用力较大,内齿边缘为拉应力状态,导致坯料易出现裂纹;材料主要表现为轴向流动趋势,造成内齿顶部填充不满。通过改进芯模结构及调整工艺参数,得到了合格的产品。

The cup-shaped inner meshing gear was deformed by power spinning machine.Product defects,such as cracks,filling shortage of inner meshing gears appeared because of difficult process of stepped surface of mandrel and one-pass spinning with disc-shaped workpiece.A 3D finite element elastic-plastic model was used to analyze the gear spin-forming.The cause of product defects was studied qualitatively.The results show that the roll-pressing force on inner gear root is much higher,and tensile stress appears at the edge of inner gears,so billet cracks easily.The axial flow is considered as the main flow of metal,and therefore underfilling appears in gear tips.Through improving the structure of the mandrel and adjusting the process parameters,the qualified parts were produced finally.

基金项目：

江西省教育厅科学技术研究项目(GJJ08204)

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