Transactions of Materials and Heat Treatment

Title：Research on optimization of rolling curve for multi-step shaft in cross wedge rolling

Authors： Lu Hongyan Yan Huajun Zhang Shuangjie Zhang Jungai Shi Xiaomeng Han Huiling

Unit： School of Materials Science and Engineering Hebei Technology Innovation Center of Cross Wedge Rolling Hebei Dongan Precision Industry Corporation Shijiazhuang City Road and Bridge Management Office

KeyWords： cross wedge rolling multi-step shaft rolling curve volume balance finite element simulation

ClassificationCode：TH122

year,vol(issue):pagenumber：2019,44(12):40-48

Abstract：

The rolling curve is an important factor for controlling the step flatness of cross wedge rolling shaft, and the current rolling curve formula is complicated and the accuracy is poor. Therefore, the multiple mold adjustments are required in the actual production. For the multi-step shaft in actual production, its process plan and spiral bevel defects of rolling parts were analyzed, and the influence laws of the rolling curve on the right angle steps at different positions of rolling part were studied. According to the principle of volume balance, the equilibrium relationship between the wedge volume of mold and the corresponding step volume of rolling part was established under the action of the rolling curve. Finally, according to the law of volume change of step shaft end for part, the rolling curve equation of the first function form was established by the various parameters and conditions, and the rolling curve was verified by the combination of finite element simulation and rolling experiment. The results reduce the repairing number of step rolling and improve the accuracy of rolling data.

Funds：

石家庄市科技局科研项目（191080071A）；河北科技大学通用航空平台开放基金项目（2015PT19）

路红岩（1993-），女，硕士研究生 E-mail：15733108597@163.com 通讯作者：张双杰（1966-），男，博士，教授，硕士生导师 E-mail：zsjzlili@163.com

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