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Supervised by Ministry of Industry and Information Technology of The People''s Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:Yazheng Li,Hongyan Huang,Zheng Wang,Zhansheng Liu,Guanghui Zhang.Measurement Uncertainty of Blade Surface by Coordinates Measuring Machines in Rotation and Parallel Sampling Modes[J].Journal of Harbin Institute Of Technology(New Series),2019,26(3):14-19.DOI:10.11916/j.issn.1005-9113.17121.
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Measurement Uncertainty of Blade Surface by Coordinates Measuring Machines in Rotation and Parallel Sampling Modes
Yazheng Li, Hongyan Huang, Zheng Wang, Zhansheng Liu,Guanghui Zhang
(School of Energy Science and Engineering,Harbin Institute of Technology, Harbin 150001, China)
Abstract:
This paper aims to investigate the measurement uncertainty of blade surface by coordinates measuring machines (CMMs) in different sampling modes. Two different sampling methods for the blade surface, which are the parallel mode and the rotation mode, are studied to examine their measurement uncertainty. The fundamental principles and operational processes of the two modes are presented and discussed. The measurements were performed on a twisted-face blade, and data processing was also conducted to fit the cross-section profile both of the base surface and back surface separately. Then the measurement uncertainties of two sampling methods were evaluated on different parts of the blade surface in terms of the surface profile’s curvature and twist rate. It is found that the measurement of blade surface by CMMs shows much uncertainty for both of the sampling modes because of the complexity of the blade surface. The back surface’s measurement uncertainty is larger than that of the base surface. The measurement uncertainty of cross-section profiles on the top blade surface is larger than that of the bottom blade surface. In addition, the difference between the measurement uncertainties of two sampling methods is small, especially for the base blade surface. The research means that both sampling methods can be a practical application choice for the measurement of blade surface by CMMs.
Key words:  CMMs  measurement uncertainty  sampling method  blade
DOI:10.11916/j.issn.1005-9113.17121
Clc Number:TK241
Fund:
Descriptions in Chinese:
  

三坐标测量机在旋转探针取样和平行探针取样模式下叶片表面测量的不确定性

李亚政,黄洪雁,王峥,刘占生,张广辉

(哈尔滨工业大学 能源学院 哈尔滨 150001)

研究目的:

为解决传统三坐标测量取样时采用平行探针测量方法所存在的不足,探究采用旋转探针进行三坐标测量的技术可行性,该技术可适应于空间受限或复杂元器件表面几何精度的测量。

研究方法:

论文采用理论分析和实验研究并用的方法,使用3+2轴卡尔.蔡司三坐标测量机进行实验研究,分析了平行探针测量法和旋转探针测量法的测量不确定性。

研究结果:

分析与研究结果表明,在没有进行进一步的算法改善的条件下,旋转探针测量法的测量不确定性与平行探针法测量不确定性相当,也即可以相互替换。如旋转探针法的算法进一步得到完善,则其精度可进一步提高。

结论:

本论文分析的三坐标测量机旋转探针取样测量法测量不确定性较好,在同等精度条件下与平行探针取样测量法不确定性水平相当,且可更适应于复杂曲面或空间受限下的测量情况。

关键词:三坐标测量;测量不确定性;取样策略;叶片

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