Transactions of Materials and Heat Treatment

Title：Numerical simulation on closed die forging process for railway vehicle knuckle

Authors： Chen Qingmin Meng Fanxiang Li Li Zhao Xuan

Unit： Jilin University

KeyWords： railway vehicle knuckle closed die forging folding defect insufficient filling defect pre-forming process

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2019,44(7):1-6

Abstract：

For the railway vehicle knuckle, the closed die forging process including free forging and pre-forming was developed. Based on the rigid-viscoplastic finite element method, the finite element model of closed die forging for knuckle was established, and the insufficient filling and folding defects in the final forging process were analyzed by numerical simulation. Then, based on the metal flow and the location and cause of forming defects in various parts of railway vehicle knuckle during the final forging process, the closed die forging process of knuckle was optimized and adjusted. Furthermore, the experiments were conducted based on the optimized forging process, and the forming error of final forgings was analyzed. The results show that the forming defects of final forgings are effectively controlled, and the forming quality is good. Thus, the improvement of the forging process for railway vehicle knuckle is ideal, and the closed die forging process of railway vehicle knuckle without defects is realized, which can be applied to the practical production.

Funds：

国家自然科学基金资助项目(51575231)

陈庆敏（1965-），男，学士，高级工程师，E-mail：chenqm@jlu.edu.cn ；通讯作者：孟凡响（1995-），男，硕士研究生，E-mail：15844800002@163.com

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