| 基于圆和非圆复合轨迹的三轴数控装备几何运动误差检测新方法 |
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| 引用本文： | 杜正春,杨帆. 基于圆和非圆复合轨迹的三轴数控装备几何运动误差检测新方法[J]. 机械工程学报, 2012, 48(16): 1-7 |
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| 作者姓名： | 杜正春 杨帆 |
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| 作者单位： | 上海交通大学机械工程与动力学院 上海200030 |
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| 基金项目： | 国家自然科学基金(50805094,51175343);机械系统与振动国家重点实验室基金(MSV201104)资助项目 |
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| 摘 要： | 针对三轴数控装备,综合考量现有方法的特点,提出一种基于圆和非圆(直线、折线)复合轨迹的几何运动误差检测新方法。根据多体系统理论,运用齐次坐标变换方法建立误差模型,通过检测三个坐标平面内直线(折线)运动轨迹精度得到包括位置误差、直线度、垂直度在内的12项直线性误差,再通过三个坐标平面内检测圆运动轨迹精度,依次辨识得到9项角偏误差,从而实现三轴机床全部21项几何运动误差的检测。根据该方法,分析在不同测量顺序下各坐标平面内角偏误差的解算情况,据此总结出8种可行的角偏误差辨识方案。基于平面光栅的检测试验在2 h内便可完成,试验结果证明该方法的可行性和高效性。
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| 关 键 词： | 复合轨迹 几何运动误差 精密检测 数控机床 |
New Measuring Method for Motion Accuracy of 3-axis Numerical Control Equipments Based on Composite Trajectory of Circle and Non-circle |
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| DU Zhengchun , YANG Fan. New Measuring Method for Motion Accuracy of 3-axis Numerical Control Equipments Based on Composite Trajectory of Circle and Non-circle[J]. Chinese Journal of Mechanical Engineering, 2012, 48(16): 1-7 |
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| Authors: | DU Zhengchun YANG Fan |
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| Affiliation: | (School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200030) |
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| Abstract: | In consideration of the disadvantages of traditional measuring methods,a new measuring method for motion accuracy of 3-axis numerical control equipments based on composite trajectory including circle and non-circle(straight line,polygonal line) by using cross grid encoder is proposed.The principles and techniques of the new measuring method are discussed in detail.8 feasible measuring strategies based on different measuring sequences are summarized.The optimized strategy is carried out in the 3-axis CNC vertical machining center Cincinnati 750 arrow by using cross grid encoder.The whole measuring time of 21 error components of the new method is cut down to 1-2 h because of easy installation,adjustment,operation and the characteristics of non-contact measurement.Result shows that the new method is suitable for on machine measurement and has good prospects of wide application. |
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| Keywords: | Composite trajectory Geometric motion error Precision measurement Numerical control machine tool |
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