摘要
现有的五轴加工中心不能满足特征样件的加工精度要求,误差模型的灵敏度分析可以建立零件几何误差和机床关键误差项的联系,通过改进关键误差项,能够有针对性地提高零件的加工精度。机床的关键误差项会随着加工位置的改变而产生变化,文中根据特征样件的加工情况,选取12个特征位置,研究关键误差项的变化规律。研究结果表明,特征样件在两个加工位置分别对应不同的关键误差项,零件的几何误差受直线导轨的偏转误差影响较大。
The five-axis machining center can not satisfy the precision of specially-designed artifact,sensitivity analysis of the error model can establish the contact between the geometric errors of artifact and the critical errors terms of machining center.Revising the critical errors terms can improve the precision of the specially-designed artifact.The critical errors terms of the machine tool will be influenced by machining position.According to the status of processing,12feature positions are selected to study the changes of the critical errors terms.The results show that the specially-designed artifact correspond to different critical errors terms under the two machining postures and the geometric errors are influenced greatly by the deflection error of the sliders.
作者
徐立勋
孙涛
XU Lixun;SUN Tao(Center for Precision Engineering, Harbin Institute of Technology, Harbin 150001, China)
出处
《机械工程师》
2018年第3期4-5,共2页
Mechanical Engineer
关键词
误差模型
灵敏度
关键误差项
error model
sensitivity
critical errors terms
