重型机床滚滑复合导轨载荷分配机理研究
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摘要
在结合滚动导轨和滑动导轨的基础上,提出了一种新型滚滑复合导轨,通过ANSYS有限元分析软件对其进行静力学分析,结果表明:无预紧力时,滑动结合面承受主要的法向载荷,滑动结合面法向载荷的占比达95%以上;同时受法向载荷和预紧力时,预紧力越大,滚动结合面法向载荷占比随之增大,法向载荷越大,滚动结合面法向力占比反而随之减小。分析并探讨了重型机床滚滑复合导轨的载荷分配机理和主要影响因素,其结果为滚滑复合导轨的进一步研究提供了理论依据,具有一定的工程应用价值。
A new type of rolling & sliding composite guide is proposed based on rolling guide and sliding guide. Static analysis of the guide was performed through the ANSYS. The results show that,without pre-tightening loads,sliding joint surface bears the main normal load,accounting for more than 95 %. While being subjected to normal loads and pre-tightening loads,the greater the pretension,the greater the proportion of the normal force of the rolling joint. On the contrary,the larger the normal load is,the less the normal force ratio of the rolling joint will be. The load distribution mechanism and main influencing factors of the rolling &sliding composite guide of heavy machine tool are also analyzed and discussed. The results provide a theoretical basis for the further study of rolling & sliding composite guide,which have a certain value of engineering application.
A new type of rolling & sliding composite guide is proposed based on rolling guide and sliding guide. Static analysis of the guide was performed through the ANSYS. The results show that,without pre-tightening loads,sliding joint surface bears the main normal load,accounting for more than 95 %. While being subjected to normal loads and pre-tightening loads,the greater the pretension,the greater the proportion of the normal force of the rolling joint. On the contrary,the larger the normal load is,the less the normal force ratio of the rolling joint will be. The load distribution mechanism and main influencing factors of the rolling &sliding composite guide of heavy machine tool are also analyzed and discussed. The results provide a theoretical basis for the further study of rolling & sliding composite guide,which have a certain value of engineering application.
引文
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[2]梁东屹.大型加工中心滑动导轨上加滚动块卸荷装置[J].制造技术与机床,2004(5):87.
[3]卢黎明,曾国文,余云云.基于ABAQUS的滚滑轴承动力学分析[J].组合机床与自动化加工技术,2016(9):103-112
[4]卢黎明,龚贺师,熊国良.滚滑轴承滑块的润滑机制[J].润滑与密封,2012,37(12):19-26.
[5]尹向东,张政泼,陈振国.一种新式复合导轨:200420030034418. 6[P]. 2005-4-27.
[6]李利强,李强,唐传刚.一种滚滑复合导轨及其制造方法:201210014940. 7[P]. 2012-7-4.
[7]杨尧.滚滑复合导轨结构及其动态特性研究[D].南京:南京理工大学,2014.
[8]张永君,刘慧男,赵海霞.滚滑复合导轨在数控机床上的应用[J].金属加工(冷加工),2010(6):44.
[9]张朝晖. ANSYS 16. 1结构分析工程应用实例解析[M].北京:机械工业出版社,2016.
[10]刘超,刘晓娟.有限元分析与ANSYS实践教程[M].北京:机械工业出版社,2016.