| 最小外接球法球度误差评价与实现 |
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| 引用本文： | 刘飞,彭晓南.最小外接球法球度误差评价与实现[J].机械工程学报,2009,45(9):243-248. |
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| 作者姓名： | 刘飞 彭晓南 |
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| 作者单位： | 西安交通大学机械工程学院;河南科技大学机电工程学院 |
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| 摘 要： | 针对直角坐标系下球体形状的误差评价，介绍一种利用最小外接球法评价球度误差的计算方法。建立基于直角坐标系下的球度误差三维评测模型，并研究外接球体几何曲面关系，得出了利用弦线截交关系快速评价球度误差的理论。利用弦线截交关系构建最小外接球法球度误差评价的“2+1”、“3+1”、“4+1”评价模式统一体，通过两次截交产生的虚拟中心定位，可以准确确定评价点的位置，达到了快速、精确利用最小外接球法评价球度误差的目的。通过分析表明，基于弦线截交关系的最小外接球球度误差评价方法计算效率高、易于实现且具有较高的评定精度，也为球度误差评价提供一种新的方法和思路。
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| 关 键 词： | 球度误差 弦线截交 直角坐标系 最小外接球法评价 |
Evaluation of Sphericity Error by Using Minimum Circumscribed Sphere |
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| LIU Fei,PENG Xiaonan.Evaluation of Sphericity Error by Using Minimum Circumscribed Sphere[J].Chinese Journal of Mechanical Engineering,2009,45(9):243-248. |
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| Authors: | LIU Fei PENG Xiaonan |
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| Affiliation: | School of Mechanical Engineering, Xi’an Jiaotong University School of Mechatronics Engineering, Henan University of Science and Technology |
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| Abstract: | Aiming at evaluation of sphericity form error in cartesian coordinates,an evaluation algorithm of sphericity error by using the minimum circumscribed sphere(MCS) is introduced.In order to evaluate sphericity error accurately,a 3D model of measuring and computing based on cartesian coordinates is established,and geometric curved surface character of circumscribed sphere is studied.As a result,the theory of using geometrical symmetry of intersecting chord to quickly evaluate sphericity error is obtained.The e... |
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| Keywords: | Sphericity error Intersecting chord Minimum circumscribed sphere evaluation Cartesian coordinates |
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