铜合金弯头冷推成形影响因素分析及工艺参数优化

基于有限元模拟软件和三维造型软件,建立有限元铜合金弯头冷推模型,进行模拟试验。结合不同的弯头冷推实际影响因素,分析了摩擦系数、模腔与芯杆间隙、推制速度对弯头冷推弯的影响。采用正交试验分析的方法建立模拟试验组,利用极差分析法分析了冷推弯中各个因素影响的主次关系,得到最优工艺参数组合。结果表明,摩擦系数为0.05,模腔与芯杆间隙为0.75 mm,推制速度为4 mm/s时,弯头冷推弯成形质量最好。实际生产验证结果与模拟结果较为吻合。

Influencing Factors and Parameters Optimization of Cold Push-bending for Copper Alloy Elbow

The cold push-bending simulation for copper alloy elbow was established based on the finite element software Deform3 D and 3 D modeling software.The effects of fraction coefficient,interval between the mould cavity and the core pin and pushing velocity were investigated.The finite element simulation was conducted by orthogonal experiment design method;the range analysis was adopted to determine the effects of the primary and secondary factors.The results showed that the cold push-bending elbow could obtain a better formation quality when the fraction coefficient was 0.05 mm,the interval between the mould cavity and the core pin was 0.75 mm,and the pushing velocity is 4 mm/s.And the parameters were confirmed by actual production.