摘要
针对精密加工过程中影响圆度误差分离精度的问题,提出了一种基于几何动态模型的圆度误差分离模拟方法。在主轴空间运动规律的基础上,通过回转体轴心的自转和公转关系建立工件截面的几何模拟动态模型。结合三点法圆度误差分离技术实现了动态条件下的圆度误差准确表示,并分析研究了传感器安装角度与干扰误差对圆度误差分离精度的影响。数值实验分析表明,建立的几何模型分析有利于研究回转加工中圆度误差分离结果的正确性,达到了提高误差分离精度及抑制误差对加工精度影响的目的。
Aiming at the accuracy of roundness error separation in precision machining,a new practical method of roundness error separation based on geometric dynamic model is proposed.Based on the synthesized of revolution and rotation of the rotor axis,the geometric dynamic model which represents the motion trajectory of the cross section of axisymmetric body is built.So the roundness error is extracted from dynamic model with the error separate technique of three-point method.In addition,the effect factors of separation accuracy,such as harmonic suppression,interference error propagation,angular error,are taken into account.The simulation and test results show that the dynamic geometric model is effective for roundness error separation,and can improve the accuracy of separation and suppress the effect of errors in workpiece machining.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2014年第1期27-32,187,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51075323)
关键词
圆度误差
三点法
误差分离
动态模型
roundness error
three point method
error separation
dynamic model
