著者

今井 秀孝 飯塚 幸三

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.52, no.4, pp.643-648, 1986-04-05 (Released:2009-06-30)

参考文献数

10

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An apparatus for the measurement of Young's modulus and its thermal coefficient has been newly developed. Both the tension and bending methods are available in this apparatus. The elongation in the tensile test or the deflection in the three-point bending test is detected by using a specially designed sample holder together with a He-Ne laser interferometer with an accuracy of better than 0.1 μm. This apparatus is especially suitable for such thin specimens as leaf springs and hair springs which are often used in precision machines or measuring instruments. The minimum size of specimen to be measured is 0.1 mm in diameter or 5 μm in thickness. Young's modulus of ordinal materials can be measured with an accuracy of better than ±3% in 95% confidence interval. Young's moduli measured by the tension method and bending method were compared with each other and the result showed a good agreement. Thermal coefficients of Young's modulus of six kinds of spring materials were also measured by means of the bending method in the temperature range between 0°C and 50°C.

著者

中薮 俊博 森 基 滝田 敦夫 岡路 正博 今井 秀孝

出版者

公益社団法人精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.61, no.2, pp.253-257, 1995-02-05

参考文献数

3

被引用文献数

1 5

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An accurate and practical system for the measurement of rolling that occurs with the movement of a machine tool unit has been developed. The system consists of a bi-prism, two plane mirrors, and a double-path optical heterodyne laser interferometer. The measurement of rolling with this system is not affected by pitching, yawing, heaving, and swaying. The measurement system was confirmed to have a sensitivity of 0.032μm/arcsec (variation of path length/unit angle of rolling), a resolution of 0.31 arcsec (used in λ/64 measurement system), and 800 mm travel length. In order to investigate the rolling that occurs in a machining centre (680 × 500 × 630 mm), the measurement was carried out in full stroke of each unit in the machining centre. The results show the reliable agreements in replication measurement.

著者

今井秀孝編

出版者

日本規格協会

巻号頁・発行日

1996