基于叶片扭角分析的整体叶轮展成电解加工运动设计  

Movement Planning in Electrochemical Contour Evolution Machining of Integral Impeller Based on Twist Angle Analysis of Vane Surface

作　　者：吴锐[1] 徐家文[1] 赵建社[1] 吴建民[1] 

机构地区：[1]南京航空航天大学江苏省精密与微细制造技术重点实验室,江苏南京210016

出　　处：《华南理工大学学报（自然科学版）》2009年第11期140-144,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金："十一五"国防科技技术基础项目

摘　　要：为提高展成电解加工整体叶轮叶片型面的加工精度和阴极运动设计的效率,以直纹面叶轮为例,研究了叶片扭角对展成电解加工的影响,提出对叶片型值点拟合曲线作法向偏置、以偏置曲线生成的特征点为依据进行展成运动轨迹设计、并根据工艺试验确定工具阴极运动参数的展成运动设计方法,从而消除叶片扭角对加工精度的不利影响.实例表明,采用该方法可以快速有效地进行整体叶轮叶片型面展成电解加工的阴极运动设计,并可提高加工精度.In order to improve the machining precision of vane surface of integral impeller and the efficiency of cathode movement planning during the electrochemical contour evolution machining, by taking a ruled-surface impeller for example, the effect of twist angle of vane surface on the machining is analyzed, and a movement planning method of contour evolution is proposed. In this method, normal offset curves are obtained from the fitting curve of vane data points, the feature points generated from the offset curves are used to design the movement trajectory of contour evolution, and the results of process experiments are employed to determine the cathode movement parameters. Thus, the negative effect of twist angle on the machining precision is effectively eliminated. It is shown that the proposed movement planning method makes rapid and efficient designs and improves the machining precision for the vane surface of integral impeller.

关 键 词：展成电解加工 整体叶轮 叶片型面 扭角 运动设计 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]