Survey on the 3D measurement of freeform shapes

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  • 複雑形状の三次元測定における精度保証に向けた研究

Abstract

<p>The forms of industrial products have become increasingly complex with the advancement of machining techniques, such as multi-axis machining and 3D printing. To assess the performance of different machine tools, the products should be accurately tested using 3D measuring systems, such as coordinate measuring machines (CMMs). To ensure the accuracy of test results, the measurement uncertainty of 3D measuring systems is evaluated by measuring the gauges calibrated with small uncertainty. Nevertheless, conducting freeform measurements with small uncertainty using the CMMs is often difficult because of the difficulty in achieving accurate probe radius compensations. Additionally, although uncertainty evaluation methods have been developed for simple form measurements, the uncertainty evaluation method for freeform measurements is still under development.</p><p>In this study, we proposed an advanced gauge, improved the probe radius compensation method, and developed the uncertainty evaluation method. Accordingly, the gauge can be calibrated within an uncertainty of 1.5 μm. In this conference, we will report the details of the developed gauge, the calibration method, and its application.</p>

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