板成形摩擦因数测量过程中影响因素分析  

Sensitivity Analysis of Friction Coefficient Testing in Sheet Metal Forming

作　　者：李泷杲[1] 高霖[1] 韦红余[1] 王辉[1] 

机构地区：[1]南京航空航天大学,南京210016

出　　处：《中国机械工程》2007年第3期357-361,共5页China Mechanical Engineering

基　　金：江苏省自然科学基金资助项目(BK2002096)

摘　　要：摩擦因数对有限元模拟结果的正确性有着很大的影响,通常使用的板料摩擦因数测试方法大都基于Ducan原理,在测试中摩擦圆辊直径和摩擦包角的大小对最终的测试结果有很大影响。设计了新的摩擦因数测试装置,考察圆辊直径和圆辊摩擦包角大小对摩擦因数计算的影响,并进行了理论分析。试验表明,随着圆辊直径和摩擦包角的增大,由弯曲和包角边界造成的干扰将逐级减小,从而计算摩擦因数也逐步减小,并且最终趋向真实摩擦因数。基于试验和有限元计算,得出包角大于90°、圆辊直径大于30mm时,测得的摩擦因数能较准确地反映当前的摩擦状况,可以用于板料成形模拟的结论。Friction coefficient has an important effect on the finitel element computation results. The universal testing way is based on the Duncan method. In the process, the friction column diameter and friction angle have large effects on the friction coefficient calculation. Therefore, a new friction coefficient measuring apparatus was designed to test the effects of the friction column diameter and friction angle on the friction coefficient calculation. The test results show that with the increase of the column diameter and angle, the calculation value of friction coefficient decreases gradually and trends towards the real value finally. Based on the test and the FEM simulation, it is found that when the diameter is larger than 30mm and the angle is larger than 90°, the calculation value of friction coefficient is exact enough to be used in the blank sheet FEM simulation.

关 键 词：板成形 摩擦因数 润滑 FEM 

分 类 号：TG386[金属学及工艺—金属压力加工]