主轴振动对表面波纹度影响及预测模型分析  

Influence of Spindle Vibrationon Surface Waviness and Prediction Model

作　　者：陈东菊[1] 李源 李天宝 范晋伟[1] Chen Dongju;Li Yuan;Li Tianbao;Fan Jinwei(School of Mechanical Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学机电学院,北京100124

出　　处：《机械科学与技术》2020年第12期1822-1827,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51875005,51475010)资助。

摘　　要：机床加工精度的影响因素中,静压主轴系统的动态特性引起的振动是加工表面波纹度产生的重要因素。基于主轴振动信息建立波纹度的生成模型,求解得到6个影响因素的灵敏度中径向轴承的位置是影响表面波纹度的主要因素。建立评价体系,通过相关法来评估生成模型与实际加工表面波纹结果之间的关系,得到了高于0.45的相关系数。最后利用功率谱密度提取主轴系统的频谱特性,发现主轴振动是影响加工精度的主要因素。In the analysis of the factors affecting the machining accuracy of the machine tool,the vibration caused by the dynamic characteristics of the hydrostatic spindle system is an important factor in the surface waviness of the machined surface.The generation model for waviness is established according to the vibration information of the main shaft,and the sensitivity of the six influencing factors is obtained.The position of the radial bearing is the main factor affecting the surface waviness.Then the evaluation system is established,and the relationship between the generated model and the actual processed surface ripple result is evaluated by using the correlation method,and a correlation coefficient above 0.45 is obtained.Finally,with the power spectral density to extract the spectral characteristics of the spindle system,it is found that the spindle vibration is the main factor affecting the machining accuracy.

关 键 词：表面波纹度 主轴振动 相关性 评价体系 

分 类 号：TH16[机械工程—机械制造及自动化]