锻压技术

热旋压轮缘对称增厚成形数值模拟及实验研究

英文标题：Numerical simulation and experiment investigation on symmetric thickening forming process for hot spinning rim

作者：吴文魁金俊松王新云邓磊龚攀

单位：华中科技大学

分类号：TG376

出版年,卷(期):页码：2018,43(10):95-103

摘要：

在加热条件下通过旋压成形的方法对圆形板料轮缘进行对称增厚，最终得到一种辐板较薄而轮缘较厚的盘形类零件，并借助ABAQUS仿真软件建立有限元模型来研究对称增厚成形过程。结果表明，在热旋压对称增厚成形过程中，径向旋压分力逐渐增大，而轴向和切向方向的旋压分力相对较小。对工艺参数的研究表明，摩擦系数μ和型槽倾角α取相对较小值时有利于成形，而进给比f取相对较大值时会更合适。随着坯料长厚比γ和成形增厚比η的不断增大，旋压对称增厚成形呈现出不同的变形特征。当γ过大时，成形易出现屈曲失稳；当η过大时，成形易出现鼓起失稳。最后，选取了一组合适的工艺参数进行增厚实验，实验得到的成形件与模拟结果吻合，验证了工艺的可靠性。

The circular plate rim was symmetrically thickened by the method of spinning under heating conditions，and a diskshaped part with a thin web and a thick rim was obtained finally. Then, the finite element model was established by ABAQUS software, and the symmetric thickening forming process was studied. The results show that during the hot spinning symmetric thickening forming process, the radial spinning force is gradually increased, while the axial and tangential spinning force are relatively small. The studies on the process parameters indicate that the small friction coefficient μ and groove incline angle α are favorable for forming, and large feed ratio f is more suitable. With the increasing of lengthtothickness ratio γ and forming thickening ratio η, the symmetric thickening forming process exhibits different deformation characteristics. When γ is too large, the forming is prone to buckling instability, however, when η is too large, the forming is prone to bulge instability. Finally, the thickening experiment is conducted by choosing a set of suitable process parameters, and the experiment result is in good agreement with the simulation result to verify the process reliability.

基金项目：

国家自然科学基金资助项目（51205144）

吴文魁（1992-），男，硕士研究生，E-mail：wuwenkui@hust.edu.cn；通讯作者: 金俊松（1980-），男，博士，副教授，E-mail: jsjin@hust.edu.cn

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