五轴数控机床定位误差对刀具轨迹的影响研究  被引量:1

Influence of Positioning Error on Tool Trajectory in Five-axis CNC Machine Tools

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作  者:吴锐[1,2] 刘华明[1,2] 胡泽启 

机构地区:[1]武汉理工大学汽车工程学院,武汉430070 [2]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070

出  处:《组合机床与自动化加工技术》2016年第2期98-101,共4页Modular Machine Tool & Automatic Manufacturing Technique

基  金:湖北省重大科技成果转化与产业化项目(2012AAA07-01);湖北省科技支撑计划项目(2012BAA08001)

摘  要:针对五轴数控机床的各轴定位误差进行分析,提出了一种包含各轴定位误差的数学模型建立方法。根据此数学模型分析了定位误差对刀具与工件相对运动轨迹的影响关系,并在MATLAB软件平台上分别模拟计算了刀具沿曲线与曲面运动的轨迹,得到了刀具理想轨迹与实际轨迹的相对关系以及各轴定位误差对刀具轨迹的综合影响规律。计算结果表明,此数学模型可以作为分析机床各轴定位精度的理论依据。根据模型计算得到了各轴定位误差对刀具运动轨迹上不同位置点的影响规律,可以为经济型五轴机床的各轴定位精度分析及其补偿提供参考。The positioning accuracy of each axis of five-axis CNC machine tool were analyzed, and the method of establishing mathematical model contained the positioning error of each axis was proposed. Then the influence of positioning error on the relative motion trajectory between the tool and the part was obtained, according to the mathematical model. And the MATLAB was used to simulate the tool trajectory a- long curve and curved surface, the relationship between the ideal trajectory and actual trajectory of tool and the combined effects of positioning error of each axis on the tool trajectory was obtained. The calculation resuits show that the mathematical model can be used as theoretical basis for analysis of positioning accuracy. According to the model calculation, the influence of each axis positioning error in the different point of the tool trajectory was got, which can provide a reference for the study of precision and compensation of economical five-axis machine tools.

关 键 词:五轴数控机床 定位误差 轨迹模拟 

分 类 号:TH161[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]

 

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