Feasibility Study of Performance Assessment Gauge for Freeform Measurement
Mari Watanabe*,, Kazuya Matsuzaki*, Osamu Sato*, Yoshiya Fukuhara**, and Masato Terasawa**
*Dimensional Standards Group, Research Institute for Engineering Measurement, National Metrology Institute of Japan (NMIJ),
National Institute of Advanced Industrial Science and Technology (AIST)
Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan
**Turbine Global Products Integration Division, Turbomachinery Headquarters, Mitsubishi Heavy Industry, Ltd., Takasago, Japan
Recent product components have been designed as a combination of complex forms for advanced functionality. Such high degree-of-freedom forms are shaped by various manufacturing processes. In the industrial supply chain, the deviation of a manufactured form from its designed form must be verified to ensure product quality. Three-dimensional (3D) measuring systems are typically used for verification. To validate the product manufacturing performance accurately, a measurement procedure that can derive the measurands of forms with small measurement uncertainty is necessitated. For simple geometries such as flats, spheres, and cylinders, precise measurement and uncertainty evaluation methods have been established; however, those for complex forms are still being developed. In this study, measurement uncertainty is assessed by measuring a calibrated gauge and comparing the measured with calibrated values. Several gauges configured with basic geometric elements have been proposed as a reference for complex form measurements, and some issues remain. Some of the gauges do not sufficiently simulate the forms of actual product components, whereas other gauges are difficult to calibrate with small uncertainties. Herein, we discuss a possible approach for solving these problems in the metrology of complex forms using 3D measuring systems. First, a new gauge concept is proposed. The gauge is designed by extracting the complex features of the actual product form and segmenting the gauge’s form into various circular arc curvatures. The geometric parameters are well calibrated, and the measurable angular range of the curvature is not limited. A representative gauge based on this concept is described. Next, a robust and small-uncertainty calibration method for complex-form objects is described. The area encompassing the target cross-section is measured, and an envelope is generated on the probe tip mechanical surface from the probe tip centers to determine the measured surface. Finally, the calibration and measurement uncertainty evaluation for the geometric parameters of the new gauge are quantitatively presented. It is verified that the proposed calibration procedure is applicable to freeform measurements, and that both simple and complex forms can be measured within a 1.5 μm uncertainty.
-  M. Petitcuenot, L. Pierre, and B. Anselmetti, “ISO specifications of complex surfaces: Application on aerodynamic profiles,” Procedia CIRP, Vol.27, pp. 16-22, doi: 10.1016/j.procir.2015.04.037, 2015.
-  ISO, “ISO 17450-1: Geometrical product specifications (GPS) – General concepts – Part 1: Model for geometrical specification and verification,” Geneva, 2011.
-  T. Trzepiecinski, T. Malinowski, and T. Pieja, “Experimental and numerical analysis of industrial warm forming of stainless steel sheet,” J. Manuf. Process, Vol.30, pp. 532-540, doi: 10.1016/j.jmapro.2017.10.028, 2017.
-  W. Renne et al., “Evaluation of the accuracy of 7 digital scanners: An in vitro analysis based on 3-dimensional comparisons,” J. Prosthet. Dent., Vol.118, No.1, pp. 36-42, doi:10.1016/j.prosdent.2016.09.024, 2017.
-  B. R. Barbero and E. S. Ureta, “Comparative study of different digitization techniques and their accuracy,” CAD Comput. Aided Des., Vol.43, No.2, pp. 188-206, doi: 10.1016/j.cad.2010.11.005, 2011.
-  V. Campanelli, S. M. Howell, and M. L. Hull, “Accuracy evaluation of a lower-cost and four higher-cost laser scanners,” J. Biomech, Vol.49, No.1, pp. 127-131, doi: 10.1016/j.jbiomech.2015.11.015, 2016.
-  Y. Z. Li, G. H. Zhang, Z. S. Liu, H. Y. Huang, S. Y. Kang, and Y. F. Peng, “Research on the Measurement Uncertainty of Blade Surface Measured by Coordinates Measuring Machines,” Ind. Eng. Manag., Vol.4, No.4, pp. 1-5, doi: 10.4172/2169-0316.1000174, 2015.
-  P. Cauchick-Miguel, T. King, and J. Davis, “CMM verification: A survey,” Meas. J. Int. Meas. Confed., Vol.17, No.1, pp. 1-16, doi: 10.1016/0263-2241(96)00001-2, 1996.
-  S. Carmignato, L. De Chiffre, H. Bosse, R. K. Leach, A. Balsamo, and W. T. Estler, “Dimensional artefacts to achieve metrological traceability in advanced manufacturing,” CIRP Ann., Vol.69, No.2, pp. 693-716, doi: 10.1016/j.cirp.2020.05.009, 2020.
-  E. Savio and L. De Chiffre, “An artefact for traceable freeform measurements on coordinate measuring machines,” Precis. Eng., Vol.26, No.1, pp. 58-68, doi: 10.1016/S0141-6359(01)00098-8, 2002.
-  E. Savio, H. N. Hansen, and L. De Chiffre, “Approaches to the calibration of freeform artefacts on coordinate measuring machines,” CIRP Ann. – Manuf. Technol., Vol.51, No.1, pp. 433-436, doi: 10.1016/S0007-8506(07)61554-6, 2002.
-  E. Savio, L. De Chiffre, and R. Schmitt, “Metrology of freeform shaped parts,” CIRP Ann. – Manuf. Technol., Vol.56, No.2, pp. 810-835, doi: 10.1016/j.cirp.2007.10.008, 2007.
-  L. Iuliano, P. Minetola, and A. Salmi, “Proposal of an innovative benchmark for comparison of the performance of contactless digitizers,” Meas. Sci. Technol., Vol.21, No.10, 105102, doi: 10.1088/0957-0233/21/10/105102, 2010.
-  V. Zelený, I. Linkeová, J. Sýkora, P. Skalník, J. Hynek, and I. N. D. Tim, “Good practice guide for verification of systems on machine tools,” IND62 TIM, “Traceable in-process dimensional measurement,” EURAMET, pp. 1-20, 2015.
-  A. Robinson, M. Mccarthy, S. Brown, A. Evenden, and L. Zou, “Improving the Quality of Measurements through the Implementation of Customised Reference Artefacts,” Proc. of the 3rd Int. Conf. 3D Body Scanning Technol., pp. 235-246, 2012.
-  B. Acko, M. McCarthy, F. Haertig, and B. Buchmeister, “Standards for testing freeform measurement capability of optical and tactile coordinate measuring machines,” Meas. Sci. Technol., Vol.23, No.9, pp. 1-13, doi: 10.1088/0957-0233/23/9/094013, 2012.
-  J. D. Barnfather, M. J. Goodfellow, and T. Abram, “Photogrammetric measurement process capability for metrology assisted robotic machining,” Meas. J. Int. Meas. Confed., Vol.78, pp. 29-41, doi: 10.1016/j.measurement.2015.09.045, 2016.
-  M. G. Guerra, F. Lavecchia, G. Maggipinto, L. M. Galantucci, and G. A. Longo, “Measuring techniques suitable for verification and repairing of industrial components: A comparison among optical systems,” CIRP J. Manuf. Sci. Technol., Vol.27, pp. 114-123, doi: 10.1016/j.cirpj.2019.09.003, 2019.
-  Y. Kondo, K. Sasajima, S. Osawa, O. Sato, and M. Komori, “Traceability strategy for gear-pitch-measuring instruments: development and calibration of a multiball artifact,” Meas. Sci. Technol., Vol.20, No.6, pp. 1-8, doi: 10.1088/0957-0233/20/6/065101, 2009.
-  M. Watanabe, K. Matsuzaki, O. Sato, Y. Fukuhara, and M. Terasawa, “Fundamental research on 3D measurement of freeform features,” Proc. of the 18th Int. Conf. on Precision Engineering (ICPE2020), P-2, 2020.
-  S. Lou, X. Jiang, and P. J. Scott, “An Introduction To Morphological Filters in Surface Metrology,” Comput. Eng. Res. Conf., pp. 1-13, 2012.
-  S. Lou, X. Jiang, and P. J. Scott, “Applications of morphological operations in surface metrology and dimensional metrology,” J. Phys. Conf. Ser., Vol.483, No.1, pp. 1-12, doi: 10.1088/1742-6596/483/1/012020, 2014.
-  ISO 10360-5, “Geometrical product specifications (GPS) – Acceptance and reverification tests for coordinate measuring machines (CMM) – Part 5: CMMs using single and multiple stylus contacting probing systems,” 2009.
-  ISO 13528, “Statistical Methods for Use in Proficiency Testing by Interlaboratory Comparisons,” 2005.
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