新型并联机床工件坐标系定位的研究  

Orientation of the Coordinate System of Workpieces on Parallel Machine Tool

作　　者：鹿玲[1] 陈修龙[2] 王瑜[1] 赵永生[1] 

机构地区：[1]燕山大学机械工程学院,秦皇岛066004 [2]山东科技大学机械电子工程学院,青岛266510

出　　处：《机械科学与技术》2007年第8期982-985,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：河北省自然科学基金项目(503287)资助

摘　　要：建立了5-UPS/PRPU并联机床机构的雅可比矩阵。在此基础上,得到了3个影响机床机构灵巧度的指标,即条件数、最小奇异值、可操作性。通过对这3个并联机床灵巧度评价指标进行分析,定义了两个灵巧度的综合评价指标——综合灵巧度系数和综合灵巧度。把5-UPS/PRPU并联机床工件坐标系的定位问题归结为在满足工作空间前提下,对刀位文件综合灵巧度的优化,对这个非线性优化问题进行了求解,得到定位矢量,并结合一个曲面定位的具体实例,给出了算法验证。We establish the Jacobian matrix for the 5-UPS/PRPU PMT （parallel machine tool）, thus obtaining the three indicators that influence its dexterity degree ： number of conditions, minimal singularity value and operability. By analyzing the three indicators, we define the two indicators for comprehensively evaluating dexterity degrees. comprehensive dexterity coefficient and comprel-ensive dexterity degree. We treat the orientation of the coordinates of a work-piece on the PMT as the minimization of the comprehensive dexterity degrees of the workpieces with given cutter location data and under the condition that the workpieces must be inside the PMT workspace. An instance of the orientation of a free-form surface is given to verify the orientation.

关 键 词：并联机床 综合灵巧度系数 综合灵巧度 定位 

分 类 号：TG5[金属学及工艺—金属切削加工及机床]