汽车连杆粉末热锻工艺的数值模拟  

Numerical simulation for powder hot-forging of automotive connecting rod

作　　者：黄永强 HUANG Yongqiang(Guangzhou Rall Wall Polytechnic,Guangzhou 510430,China)

机构地区：[1]广州铁路职业技术学院,广州510430

出　　处：《粉末冶金工业》2023年第5期89-95,共7页Powder Metallurgy Industry

摘　　要：连杆作为汽车传动机构,是汽车发动机中的关键零件,需具备较高的力学性能强度和一致性,因此粉末冶金方法制备的连杆坯料需要密度分布均匀。实验利用有限元Deform软件对不同密度的坯料进行数值模拟,确定坯料的相对密度为0.8。在此基础上,再采用正交实验的方式对各热锻工艺参数进行优化,最终确定锻压速度为350 mm/s、模具预热温度为300℃、坯料加热温度为1130℃、摩擦因数为0.2的最佳工艺组合方案,并通过实验验证最佳工艺组合的可靠性,实现了高性能汽车连杆的制备。The connecting rod is an essential part of the automobile engine.As one of the automobile transmission parts,it is required to own high mechanical strength and consistency.Therefore,the powder compact prepared by powder metallurgy method should have uniform density distribution.This paper used finite element deform software to simulate different densities of rod compact and determine that the relative density is 0.8.An optimal combination scheme with forging speed of 350 mm/s,mold preheating temperature of 300℃,compact heating temperature of 1130℃and friction coefficient of 0.2 is obtained from the numerical simulations designed by the orthographical method.Finally,the reliability of the optimal combination is verified through experiments,and the preparation of high-performance automotive connecting rods is achieved.

关 键 词：粉末冶金 热锻工艺 数值模拟 相对密度 连杆 

分 类 号：U466[机械工程—车辆工程]