| Accuracy Analysis and Calibration of Gantry Hybrid Machine Tool |
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| 引用本文： | 唐晓强,李铁民,尹文生,汪劲松. Accuracy Analysis and Calibration of Gantry Hybrid Machine Tool[J]. 清华大学学报, 2003, 8(6): 702-707 |
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| 作者姓名： | 唐晓强 李铁民 尹文生 汪劲松 |
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| 作者单位： | Manufacturing Engineering Institute，Department of Precision Instruments and Mechanology，Tsinghua University，Manufacturing Engineering Institute，Department of Precision Instruments and Mechanology，Tsinghua University，Manufacturing Engineering Institute，Department of Precision Instruments and Mechanology，Tsinghua University，Manufacturing Engineering Institute，Department of Precision Instruments and Mechanology，Tsinghua University Beijing 100084，China，Beijing 100084，China，Beijing 100084，China，Beijing 100084，China |
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| 基金项目： | the National High- Tech Research andDevelopm ent Program of China (No.2 0 0 2 AA4 2 1180 )and the Knowledge Innovation Program of ChineseAcademy of Sciences (No.KJCX1- X- 0 1) |
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| 摘 要： | IntroductionKinematic accuracy is a key factor in the design ofparallel kinematic machine tools. However,research on the accuracy of parallel kinematicmachine tools is still in its initial stage because ofthe complexities of nonlinear errors. Structural error sensibility is an important partin structural accuracy research. Faik andErdman[1] analyzed the sensibility of four barlinkages by introducing a dimensionless errorfactor for sensibility of each leg.Wu andLankarani[2 ] used the value o…
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| 关 键 词： | 精确度 动态刻度法 机床设计 Jacobian矩阵 |
Accuracy Analysis and Calibration of Gantry Hybrid Machine Tool |
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| TANG Xiaoqiang ,LI Tiemin,YIN Wensheng,WANG JinsongManufacturing Engineering Institute. Accuracy Analysis and Calibration of Gantry Hybrid Machine Tool[J]. Tsinghua Science and Technology, 2003, 8(6): 702-707 |
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| Authors: | TANG Xiaoqiang LI Tiemin YIN Wensheng WANG JinsongManufacturing Engineering Institute |
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| Affiliation: | TANG Xiaoqiang **,LI Tiemin,YIN Wensheng,WANG JinsongManufacturing Engineering Institute,Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China |
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| Abstract: | The kinematic accuracy is a key factor in the design of parallel or hybrid machine tools. This analysis improved the accuracy of a 4-DOF (degree of freedom) gantry hybrid machine tool based on a 3-DOF planar parallel manipulator by compensating for various positioning errors. The machine tool architecture was described with the inverse kinematic solution. The control parameter error model was used to analyze the accuracy of the 3-DOF planar parallel manipulator and to develop a kinematic calibration method. The experimental results prove that the calibration method reduces the cutter nose errors from ±0.50 mm to ±0.03 mm for a horizontal movement of 600 mm by compensating for errors in the slider home position, the guide way distance and the extensible strut home position. The calibration method will be useful for similar types of parallel kinematic machines. |
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| Keywords: | calibration accuracy hybrid machine tool |
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