Zhou, J., Yu, Y., Zeng, Q.
Analysis and experimental studies of internal voids in multi-wedge cross wedge rolling stepped shaft
(2014) International Journal of Advanced Manufacturing Technology, 72 (9-12), pp. 1559-1566. 被引用 19 次.
归属机构: College of Material Science and Engineering, Chongqing University, Chongqing, China
摘要: In this study, a rigid-plastic finite element method (FEM) simulation model for a multi-wedge cross wedge rolling (MCWR) was developed to analyze the generation mechanisms of internal defects. Two feature parts in MCWR, rod area and store area, were defined to analyze the internal defects mechanisms. The difference of stress states between the rod and store areas was pointed out and an insight into generation mechanism was concluded. Based on simulation, the influence of mold parameters was discussed and an optimized parameter group was achieved. The results indicate that the internal voids in the store and rod areas were extended from microcracks produced by shear stress cycle, and then develop to cracks due to the overlarge first principle tension stress caused by metal backflow. In a certain range, a smaller forming angle and a reasonable area reduction is good for avoid center voids in store area. Subsequently, the industrial test manifested the feasibility of study results. © 2014 Springer-Verlag London.
作者关键字: FEM; Keyword: Internal failures; Mold structure optimization; Multi-wedge cross wedge rolling
索引关键字: Computer simulation; Defects; Fatigue of materials; Finite element method, Cross-wedge rolling; Finite element method simulation; Generation mechanism; Industrial tests; Internal defects; Internal failure; Mold structure; Optimized parameter, Microcracks
通讯地址: Yu, Y.; College of Material Science and Engineering, Chongqing University, Chongqing, China; 电子邮件: firstname.lastname@example.org
出版商: Springer-Verlag London Ltd
来源出版物名称缩写: Int J Adv Manuf Technol