Thermal influences as an uncertainty contributor of the coordinate measuring machine (CMM)
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ORIGINAL ARTICLE
Thermal influences as an uncertainty contributor of the coordinate measuring machine (CMM) Meirbek Mussatayev 1 & Meifa Huang 1 & Selim Beshleyev 2 Received: 29 October 2019 / Accepted: 28 August 2020 / Published online: 30 September 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract Estimates of the measurement uncertainty are crucial, without which precision measurements are useless from a practical point of view. Dimensional compliance with geometric product specifications (GPS) plays a key role in decision-making in manufacturing engineering. Without rigorous uncertainty assessment, manufacturers risk making incorrect decisions. Coordinate measuring machine (CMM) measurements are suitable when complex measurement tasks of a workpiece must be made, such as measurements of positional tolerances or repetitive measurements. Here, we attempted to solve problems related to the thermal influences in the assessment of uncertainty in Coordinate Metrology. Task-specific experiments based on the identification of residual errors using a hole plate standard calibrated by Physikalisch-Technische Bundesanstalt (PTB) were performed to compare the measurement uncertainty results in the different temperature ranges. The thermal issues of CMMs include measurements of the temperature of the environment and CMM errors, estimation of the uncertainties of the thermal errors of the CMM, and reduction of the uncertainties related to thermal errors of CMMs. Computation of the thermal errors must account for environmental influences and internal heat sources of the CMM. Assessment of the uncertainty of thermal errors covers almost all factors related to the uncertainty of the CMM. The state-of-the-art technique for determining the uncertainty of the measurements is discussed. Keywords Uncertainty . Accuracy . CMM . Workpiece . Tolerance . Dimensional metrology
1 Introduction The Fourth Industrial Revolution, or Industry 4.0, encompasses many aspects, including dimensional metrology. Many technologies are available to easily measure various geometric characteristics (such as size, distance, form, and surface texture). Based on advanced technology with precision surface measurement instruments, the threedimensional height variations on surfaces of test materials are now being measured. X-ray computed tomography images of an object from different angles are obtained, and a volumetric representation of the object is * Meifa Huang [email protected] 1
School of Mechanical & Electrical Engineering, Guilin University of Electronic Technology, No.1, Jinji Road, Qixing District, Guilin City, Guangxi Province, People’s Republic of China
2
Caspian Oil Services Management Incorporation Kazakhstan LLP, Atyrau, Kazakhstan
reconstructed from these images [1]. Conventional coordinate measuring machines (CMMs) are competitive with X-ray computed tomography in terms of measurement accuracy. Commonly, CMMs consist of three fundamental components such as the machine, the measuring probe, and the control system w
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