考虑结合部热变形的滚动导轨刚度特性分析  

Stiffness Analysis of Rolling Guide Considering Thermal Deformation of Joint

作　　者：赵欢乐 库祥臣[1] 苏春堂[2] 杨星涛 ZHAO Huan-le;KU Xiang-chen;SU Chun-tang;YANG Xing-tao(School of Mechatronics Engineering,He’nan University of Science and Technology,He’nan Luoyang 471003,China;Anyang Xinsheng Machine Tool Co.,Ltd.,He’nan Anyang 455000,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]安阳鑫盛机床股份有限公司,河南安阳455000

出　　处：《机械设计与制造》2024年第6期144-149,共6页Machinery Design & Manufacture

基　　金：河南省重大科技专项—ADi系列数控车床智能化技术研发及产业化应用(171100210300)。

摘　　要：为提高滚动导轨副动态刚度,基于弹性力学中Hertz接触理论,考虑外载荷、预紧力、热变形等因素的影响下,对滚动导轨副进行了动态Hertz接触刚度建模。从单个滚珠-滚道接触特性出发,对比分析了滚珠-滚道接触变形关系。以某NSK直线导轨为对象,分析了导轨副在3种预紧力等级下不同垂直载荷对导轨副刚度特性影响规律。运用有限元软件对比仿真分析了不同垂直载荷下导轨副Hertz接触变形以及热变形对导轨副接触刚度的影响,结果表明:预紧力对临界载荷的影响较大从而影响滚动导轨副的刚度;摩擦热变形随着载荷的增加使导轨副接触刚度降低,对比验证了考虑热变形的接触刚度建模方法的合理性以及模型的准确性。In order to improve the dynamic stiffness of the rolling guide pair,based on the Hertz contact theory of elasticity,the dy-namic Hertz contact stiffness model of the rolling guide pair was established considering the influence of external load,preload,thermal deformation and other factors.Based on the contact characteristics of single ball raceway,the contact deformation relation-ship of ball raceway is analyzed.Taking a NSK linear guideway as an example,the influence of different vertical loads on the stiff-ness characteristics of guideway pair under three preload levels is analyzed.The influence of Hertz contact deformation and thermal deformation on the contact stiffness of the guide rail pair under different vertical loads is analyzed by using finite element software.The results show that the preload has a greater influence on the critical load,which affects the stiffness of the rolling guide rail pair;the friction thermal deformation reduces the contact stiffness of the guide rail pair with the increase of the load,which verifies the contact stiffness considering thermal deformation The rationality of the modeling method and the accuracy of the model.

关 键 词：滚珠直线导轨副 接触变形 结合部 动态刚度 分析模型 热变形 

分 类 号：TH16[机械工程—机械制造及自动化] TG519.1[金属学及工艺—金属切削加工及机床]