A methodology for error characterization and quantification in rotary joints of multi-axis machine tools
A methodology for error characterization and quantification in rotary joints of multi-axis machine tools
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DOI：
10.1007/s00170-010-2677-4
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
A. W. Khan;Wuyi Chen
中科院分区：
文献类型：
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作者：
A. W. Khan;Wuyi Chen
提出了一种新的多轴机床旋转关节误差的表征、评价和量化方法，并以双球杆系统为工作标准进行了验证。这种方法大大简化了测量设置，加快了误差量化。此外，该方法被观察到是非常经济的，通过减少工具和仪器。然而，在测量和计算误差方面需要相当多的时间和很少的努力。所开发的方法是能够评估的五个自由度（DOF）的误差，包括两个径向误差，一个轴向误差，和两个倾斜误差的六个自由度的误差分量的旋转关节。采用带点附件的DBB系统，通过多点、多位置的长度变化直接测量，并采用数学建模技术和方程求解器进行误差评估和量化。验证和认证的方法和获得的结果进行了仿真过程之前，实施的方法对五轴涡轮机叶片磨床的旋转接头。介绍了应用三次样条技术对涡轮机叶片磨床“A”、“B”回转接头进行误差建模的结果及其进一步应用。该方法被发现非常实用，非常简单，高效，易于使用的误差表征和量化的旋转关节的多轴机床。
A novel methodology was developed and implemented for error characterization, evaluation, and its quantification in a rotary joint of multi-axis machine tools by using a calibrated double ball bar (DBB) system as a working standard. This methodology greatly simplified the measurement setup and accelerated the error quantification. Moreover, the methodology is observed to be highly economical by reducing the tooling and instrumentation. However, considerable time and little more efforts are required in measuring and computing the errors. The developed methodology is capable of evaluating the five degrees of freedom (DOF) errors including two radial errors, one axial error, and two tilt errors out of six DOF error components of rotary joints. A DBB system with point accessory was used for direct measurement by change of length at multi-points and various locations, whereas mathematical modeling technique was implemented, and equation solvers were exercised for error evaluation and its quantification. Validation and authentication of the methodology and results obtained were carried out by simulation process prior to implementing the methodology on rotary joints of a five-axis turbine blade grinding machine. The results obtained from “A” and “B” rotary joints of the turbine blade grinding machine were presented by applying cubic spline technique for error modeling and its further utilization. The methodology was found extremely pragmatic, quite simple, efficient, and easy to use for error characterization and its quantification in rotary joints of multi-axis machine tools.