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Abstract

This paper presents a new interim check device for coordinate measuring machines (CMMs) built from an AISI 1020 carbon steel bar with the incorporation of calibrated spheres. This artifact’s construction was made to make the interim checks of machines of this type faster and cheaper. Three devices were designed based on the ISO 10360-2 standard, the good practice guide No. 42 (NPL), and prominent authors’ research on the subject. The three options are presented in detail, but only one was built due to budget, size, and adaptability restrictions. An exploratory study was conducted to verify the device’s usability in two CMMs and concluded that the differences between the measurements are not significant. However, one machine had absolute variation values and a total standard deviation higher than the other, generating a larger expanded uncertainty.
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Authors and Affiliations

Rodrigo Schons Arenhart
1
Morgana Pizzolato
1
Fernanda Hänsch Beuren
2
Adriano Mendonça Souza
3
Leandro Cantorski da Rosa
1

  1. Federal University of Santa Maria, Department of Production Engineering and Systems, Roraima Avenue, 1000, Santa Maria, Brazil
  2. State University of Santa Catarina, Department of Industrial Technology, Fernando Hastreiter Street, São Bento do Sul, Brazil
  3. Federal University of Santa Maria, Statistics Department, Roraima Avenue, 1000, Santa Maria, Brazil
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Abstract

Reliable measurement uncertainty is a crucial part of the conformance/nonconformance decision-making process in the field of Quality Control in Manufacturing. The conventional GUM-method cannot be applied to CMM measurements primarily because of lack of an analytical relationship between the input quantities and the measurement. This paper presents calibration uncertainty analysis in commercial CMM-based Coordinate Metrology. For the case study, the hole-plate calibrated by the PTB is used as a workpiece. The paper focuses on thermo-mechanical errors which immediately affect the dimensional accuracy of manufactured parts of high-precision manufacturers. Our findings have highlighted some practical issues related to the importance of maintaining thermal equilibrium before the measurement. The authors have concluded that the thermal influence as an uncertainty contributor of CMM measurement result dominates the overall budgets for this example. The improved calibration uncertainty assessment technique considering thermal influence is described in detail for the use of a wide range of CMM users.
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Bibliography

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[2] International Organization for Standardization (2017). Geometrical product specifications (GPS) – Inspection by measurement of workpieces and measuring equipment – Part 1: Decision rules for proving conformance or non-conformance with specifications (ISO Standard No. 14253-1:2017). https://www.iso.org/standard/70137.html
[3] Mussatayev, M., Huang, M.,&Tang, Zh., (2020). Current issues in uncertainty of dimensional tolerance metrology and the future development in the domain of tolerancing. IOP Conference Series: Materials Science and Engineering, 715(1). https://doi.org/10.1088/1757-899X/715/1/012084
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[7] Płowucha, W. (2019). Point-straight line distance as model for uncertainty evaluation of coordinate measurement. Measurement, 135, 83–95. https://doi.org/10.1016/j.measurement.2018.11.008
[8] Mussatayev, M., Huang, M., & Beshleyev, S. (2020). Thermal influences as an uncertainty contributor of the coordinate measuring machine (CMM). The International Journal of Advanced Manufacturing Technology, 111, pp. 537–547. https://doi.org/10.1007/s00170-020-06012-3
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[12] International Organization for Standardization (2004). Geometrical Product Specifications (GPS) – Coordinate measuring machines (CMM): Technique for determining the uncertainty of measurement – Part 3: Use of calibrated workpieces or standards (ISO Standard No. ISO/TS 15530-3). https://www.iso.org/standard/38695.html
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[16] Płowucha, W. (2020). Point plane distances model for uncertainty evaluation of coordinate measurement. Metrology and Measurement Systems, 27(4), 625–639. https://doi.org/10.24425/mms.2020.134843
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[18] Cheng Y. B., Chen X. H., & Li Y. R. (2020). Uncertainty Analysis and Evaluation of Form Measurement Task for CMM. Acta Metrologica Sinica, 41(2), 134–138. https://doi.org/10.3969/j.issn.1000-1158.2020.02.02 (in Chinese).
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[31] Huang, Z., Zhao, L., Li, K., Wang, H., & Zhou, T. (2019). A sampling method based on improved firefly algorithm for profile measurement of aviation engine blade. Metrology and Measurement Systems, 26(4), 757–771. https://doi.org/10.24425/mms.2019.130565
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Authors and Affiliations

Meirbek Mussatayev
1
Meifa Huang
1
Marat Nurtas
2
Azamat Arynov
3

  1. Guilin University of Electronic Technology, School of Mechanical & Electrical Engineering, 1 Jinji Rd, Guilin, Guangxi, 541004, China
  2. International Information Technology University, Department of Mathematical and Computer Modelling, Kazakhstan
  3. School of Engineering at Warwick University, United Kingdom
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Abstract

Coordinate Measurement Machines (CMMs) have been extensively used in inspecting mechanical parts with higher accuracy. In order to enhance the efficiency and precision of the measurement of aviation engine blades, a sampling method of profile measurement of aviation engine blade based on the firefly algorithm is researched. Then, by comparing with the equal arc-length sampling algorithm (EAS) and the equi-parametric sampling algorithm (EPS) in one simulation, the proposed sampling algorithm shows its better sampling quality than the other two algorithms. Finally, the effectiveness of the algorithm is verified by an experimental example of blade profile. Both simulated and experimental results show that the method proposed in this paper can ensure the measurement accuracy by measuring a smaller number of points.

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Authors and Affiliations

Zhi Huang
Liao Zhao
Kai Li
Hongyan Wang
Tao Zhou
ORCID: ORCID

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