复合数控机床几何误差建模及灵敏度分析  

Geometric error modeling and sensitivity analysis of compound CNC machine tools

作　　者：范晋伟[1] 吕琦[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《制造技术与机床》2017年第3期69-73,共5页Manufacturing Technology & Machine Tool

基　　金：国家科技重大专项:中高档国产数控磨床可靠性规模化提升工程(2013ZX04011013);国家自然科学基金项目:数控机床加工缺陷成因的逆向追踪理论与实验研究(51275014)

摘　　要：为了提高复合数控机床的加工精度,研究了机床的几何误差建模及灵敏度分析。以CHD-25型9轴5联动车铣复合数控机床为对象,介绍基于多体系统运动学理论的机床几何误差建模方法,模型涉及37项几何,分别对37项几何误差进行了误差灵敏度分析。通过计算与分析误差灵敏度系数,最终识别出影响机床加工精度的关键性几何误差,为复合数控机床的设计提供有效的理论依据。In order to improve the compound machining accuracy of NC machine tools,studies the geometric error modeling and sensitivity analysis method. Use CHD-25 type 9-axis 5 linkage turning-milling compound NC machine tool as a research object,this paper introduces the geometric error modeling method of the machine tool based on the multi-body system kinematics theory. The model involves 37 items of geometrical errors. By calculating and analyzing the error sensitivity coefficient,the key geometric errors that affect the machining precision are identified finally,which provides an effective theoretical basis for the design of compound CNC machine tools.

关 键 词：复合数控机床 多体系统理论 误差建模 灵敏度分析 

分 类 号：TH161[机械工程—机械制造及自动化]