High accuracy three-dimensional shape measurements for supporting manufacturing industries

— Establishment of the traceability system and tandardization —

Abstract

Digital engineering technique has widely been used for speedy and effective manufacturing of industrial products. Coordinate measuring machines (CMM) are being used for measuring three-dimensional shapes of products and taking an important role to keep the quality of the products high. National Metrology Institute of Japan (NMIJ/AIST) has established the traceability system of CMM, that is, measurement results by CMM are traceable to the national standards of length. To achieve this objective, not only calibration techniques have been developed, but industrial standards (ISO and JIS) and guidelines to which accredited laboratories should conform were documented. In addition, to raise the calibration capabilities of prefectural laboratories and to contribute to the local industries, technical supports have been provided by NMIJ.