粉末热锻凸轮的数值模拟  

Numerical simulation of powder hot forging cam

作　　者：黄永强[1] 申小平[2] 潘诗琰[2] 孙亚玲[3] 范沧[1] 

机构地区：[1]南京理工大学材料科学与工程学院,江苏南京210094 [2]南京理工大学工程训练中心,江苏南京210094 [3]南京技师学院机械工程系,江苏南京210033

出　　处：《粉末冶金工业》2016年第2期50-57,共8页Powder Metallurgy Industry

摘　　要：凸轮作为装配式凸轮轴上的关键零部件之一,其制造技术很大程度上影响着凸轮轴及发动机的发展。采用验证实验的方法确认有限元法模拟粉末热锻凸轮的压制及热锻成形过程的合理性,在此基础上利用数值模拟法对凸轮的压制方式进行改进、优化热锻工艺参数。针对粉末压制成形工艺,对不同压制方式下(单向压制、双向压制、浮动压制、摩擦压制)的压坯密度进行模拟分析。而针对热锻工艺则研究分析锻压速度、摩擦因数、坯料加热温度、模具预热温度、坯料初始相对密度5组因素对锻件密度分布的影响,从而获得最佳的工艺方案。As one of the key components of the assembly camshaft, the manufacturing method of cam has a great influence on the development of camshaft and engine. The numerical simulation of compacting and hot forging pro- cess was validated by comparing density distribution of simulation and experiment. Then, the method of numerical simulation was used to improve and optimize the process parameters for the compaction and hot forging process of the cam. For compacting process, the density distributions of green compact under different compacting methods （single compaction, double compaction, floating compaction and friction compaction） was simulated. For hot forg- ing process, the density distributions of forged piece with different combinations of five primary parameters, which are forging speed, friction coefficient, heating temperature of compact, preheating temperature of mold, initial relative density of compact was studied.

关 键 词：金属材料 粉末成形 数值模拟 凸轮 相对密度 

分 类 号：TK403[动力工程及工程热物理—动力机械及工程] TF125[冶金工程—粉末冶金]