Transactions of Materials and Heat Treatment

Title：Multi-directional flow controlled forging technology and experimental research on steering piston of automobile

Authors： Sun Hongxing Wang Jinbao Liu Baixuan Liu Hua Zhao Shengdun

Unit： 1. School of Mechanical Engineering Xi′an Jiaotong University 2. Zhengzhou Research Institute of Mechanical Engineering Co. Ltd.

KeyWords： steering piston isothermal compression flow controlled forming single station multi-directional flow controlled forging

ClassificationCode：TG316

year,vol(issue):pagenumber：2019,44(10):8-13

Abstract：

For the steering piston, on the basis of analyzing the structure of steering piston and the current production situation of forging, a new technological scheme of precision forming for steering piston was put forward, namely, multi-directional flow controlled forging. Then, the high temperature plastic deformation properties of piston material were obtained by isothermal compression tests, and the three-dimensional model of new process was established to numerically simulate the forming process. Furthermore, the forming process of steering piston in different stages was analyzed respectively, and the optimized process scheme was obtained by comparing with the three kinds of process schemes to effectively reduce the load by about 25%. Finally, the multi-directional CNC press and die were designed and manufactured, and the qualified steering piston samples were produced through experiments. And the load difference between test and simulation

is only about 1%. Thus, the accuracy of simulation analysis and the feasibility of new process are verified, and the new process realizes single station, low stress forming, material saving, energy saving and efficient manufacturing.

Funds：

科技部院所基金项目（2013EG119106）

作者简介：孙红星（1975-），男，博士研究生，研究员 E-mail：sunhx@zrime.com.cn

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