模具技术Issue(3)：60-67,8.
基于工程力学的模具结构优化设计与应力研究
Die structure optimization design and stress research based on engineering mechanics
摘要
Abstract
This paper focuses on the metal steering knuckle of an automobile,proposing a hot forging process based on the analysis of the steering knuckle's structure,materials,and process.By calculating the extrusion pressures in the mold cavity for both the mold entrance casting and the straight cylindrical casting,the internal deformation due to external loads acting on the entire casting in the mold is determined.Using finite element software,the hot forging process of the mold is simulated,revealing a gap defect in the longest branch of the mold.To address this defect,a resistance wall structure is designed within the mold,aiming to control the direction and speed of the molten material flow,thereby preventing gap defects in the casting.The results show that,compared to the original design,the pre-forging load increased by 16.09％,and the final forging load increased by 11.94％.The optimized mold demonstrates the best performance among all molds,with injection time,shear rate,and filling rate of 10.13 s,5× 105 s-1,and 97.14％,respectively.By adjusting the slope and gap levels of the resistance wall,significant improvements in mold wear were achieved.关键词
模具结构/转向节热锻成型/外在载荷/有限元软件/剪切速率Key words
die structure/hot forging of steering knuckle/external load/finite element software/shear rate分类
信息技术与安全科学引用本文复制引用
李德争,蔡莉莉,段诏,黎小文..基于工程力学的模具结构优化设计与应力研究[J].模具技术,2025,(3):60-67,8.基金项目
云南省交通运输厅,先简支后结构连续桥梁精细化动态施工控制技术及质量管理体系研究(编号:云交科教[2018]28号). （编号:云交科教[2018]28号）
