虚拟轴加工中心机构特点及其刚度分析方法  

Virtual Axis Hexapod Machine Centres and the Method for Stiffness Analysis

作　　者：陈吉清[1] 陈秉聪[1] 宁素俭 张书军 

机构地区：[1]吉林工业大学汽车工程学院

出　　处：《吉林工业大学学报》1998年第4期37-43,共7页

基　　金：国家自然科学基金

摘　　要：简述了该种加工中心的核心机构———一种倒置的Ｓｔｅｗａｒｔ平台的结构特性，介绍了一种通用的机构刚度分析方法。首次应用该方法建立了虚拟轴的六杆机构的端点刚度矩阵。该矩阵可用于力／位混合控制算法设计，以有效提高机床的加工精度。此外，端点刚度的分析还可为六杆机构的虚拟轴加工中心的整体构形、腿长及其分布的合理设计提供重要依据。Virtual Axis hexapod machine centres were developed in 90′s.They are a totally novel and advanced machine tools for the 21 century.This paper presents the structural characteristic of this kind of machining tools,a inverse Stewart Platform and proposes a general stiffness analysis method for mechanisms developed by the authors.With this method,the end effector stiffness matrix of a hexapod machining centre is first established.This matrix can be used to design displacement/force hybrid control algorithm the increase the machining precision.In addition,the end effector stiffness analysis can also provide very important information for whole machine configuration design,leg length and distribution determination.

关 键 词：加工中心 刚度分析 六杆机构 虚拟轴加工中心 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]