高功率密度发动机连杆热模锻工艺模拟与优化

摘要

The aim of this study was to investigate the hammer forging process of connecting rod of one high-power-den-sity engine. The classical process design method was employed to design the hammer forging process, and the finite element method was used to analyze the process. By using numerical simulation, the filled effect was analyzed, the geometrical evo-lution of preform and defect were shown in numerical simulation results, and the geometry of preform and hammer process were optimized. Experimental work verified the accuracy of numerical simulation results. The obtained forging of connecting rod has homogeneous microstructure without any defects, which can satisfy all the technical requirements.%目的：研究某高功率密度发动机连杆的锻造工艺。方法首先采用传统设计方法设计了连杆模锻工艺，再通过有限元模拟分析优化工艺。结果根据有限元模型，分析了传统设计方法下的毛坯充型效果，直观地再现了终锻成形过程中的坯料外形演变和容易出现成形缺陷，在此基础上，优化了毛坯尺寸，满足了终锻充型要求。结论通过工艺试验进一步验证了模拟结果，获得的锻件没有出现缺肉、折叠等缺陷，微观组织较均匀，能够满足技术要求。