参数曲面五轴加工轨迹优化方法  

Parametric Surface Trajectory Optimization Method of Five-axis Machining

作　　者：赵延国[1,2] 赵吉宾[1] 邹强[1,2] 金海洋[1,2] 刘广保[1] 

机构地区：[1]中国科学院沈阳自动化研究所,沈阳110016 [2]中国科学院大学,北京100049

出　　处：《组合机床与自动化加工技术》2014年第12期1-4,9,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金(51175495);国家重点基础研究发展计划("973"计划)基金(2011CB302400)

摘　　要：非线性误差是五轴加工中加工误差的重要来源,不可避免。针对五轴加工中的非线性误差问题,分析了非线性误差产生的原因,提出了一种减小机床非线性误差的轨迹优化算法。该方法直接计算各实际刀轨与工件参数曲面之间的误差,找出非线性误差过大的刀位,通过递归插入新刀位来减小非线性误差,直到满足精度。插入刀位点时,结合曲面凹凸性及刀具路径的弦弧逼近误差,同时将过切、欠切情况考虑在内。仿真分析结果显示该方法能避免插入不必要的刀位点,可显著减小非线性误差。Nonlinearity error is an important source of error in five-axis machining and it’ s inevitable. A-gainst the issue of nonlinearity error in five-axis machining, the reason for generating nonlinearity error is analyzed and a trajectory optimization algorithm to reduce the nonlinearity error is proposed. The method di-rectly calculates the error between the actual tool path and workpiece parametric surface, identifies cutter lo-cations with excessive errors, and reduces nonlinearity error through inserting new cutter locations recur-sively until meeting the accuracy. When inserting cutter locations, combine concavity of surface and approx-imation error of tool path and take overcut and undercut into account. The simulation analysis result shows this method can avoid inserting unnecessary cutter locations and reduce the nonlinear error significantly.

关 键 词：五轴加工 非线性误差 插补 参数曲面 

分 类 号：TH166[机械工程—机械制造及自动化]