行星差动微位移机构轴向变形分析与仿真  

The Analysis and Simulation of Axial Contact Deformation of Planetary Differential Micro-Displacement Mechanism

作　　者：樊曙天[1] 王宝琦[1] 郭显鹏 

机构地区：[1]江苏大学机械工程学院精密工程研究所,江苏镇江212013

出　　处：《机械设计与制造》2016年第8期20-23,共4页Machinery Design & Manufacture

基　　金：高档数控机床与基础制造装备科技重大专项(2013ZX04003-044)

摘　　要：以行星差动滚柱丝杠为研究对象,设计一种新型微位移机构,用来进行刀具补偿。轴向刚度是评价行星滚柱丝杠综合性能的重要指标之一,运用赫兹接触理论对行星差动滚柱丝杠的轴向接触变形进行理论分析。行星差动滚柱丝杠的结构类似于行星滚柱丝杠的结构,建立机构简化模型,并用ANSYS软件对模型进行有限元仿真分析。最后,将解析值与仿真值进行对比来验证简化模型的是否合理,并进行误差分析。结果显示,仿真值与理论值相对误差均在5%以内,表明所创建的有限元简化模型较为合理。Based on the analysis of planetary differential roller screw,a planetary differential micro-displacement mechanism is designed for tool compensation. Axial stiffness is an important indicator of overall performance evaluation of planetary roller screw. The axial stiffness is analyzed by Hertz contact theory.The structure of the planetary differential screw is similar to planetary roller screw. Simplified model of mechanism is confirmed by the simulation of ANSYS. Finally,the theoretical value and simulation value are compared to verify the simplified model,and the error is analyzed. The results show that the relative error between simulation values and theoretical values are less than 5%,therefore,the simplified model of the finite element is reasonable.

关 键 词：行星差动滚柱丝杠 赫兹接触变形 轴向刚度 有限元分析 误差分析 

分 类 号：TH113[机械工程—机械设计及理论] TP506.1[自动化与计算机技术]