著者

山中 啓司 菊池 務

出版者

一般社団法人 日本高圧力技術協会

雑誌

圧力技術 (ISSN:03870154)

巻号頁・発行日

vol.56, no.3, pp.136-141, 2018-05-25 (Released:2018-06-28)

参考文献数

14

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After tightening a bolt, technical knowledge on how far the thread of the bolt should protrude from the nut is not organized. Therefore, in addition to the surveys of existing standards, surveys were conducted in consideration of thread strength at bolt tightening, sealing performance of flange joints, and corrosion. As a result, it was found that the protruding length of the screw thread of the bolt had little influence on the strength of the screw and the sealing performance of the flange joint. However, if it is below flush with nut face, there is a possibility of promoting corrosion by dust and moisture, so one or more protrusion lengths may be required.

著者

藤垣 元治 森本 吉春 米山 聡 西岡 明彦 山中 啓司

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2003, no.7, pp.351-352, 2003-08-05

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A profile inspection method which can measure the height distribution of a roadbed from a high-speed vehicle is required for a health monitoring of the roadbed. A light-section method is often used for this purpose. The analysis time is, however, long because this method analyzes a 2-D image to obtain a height distribution along a line. An intensity ratio method was proposed as a profile measurement method. This method can be realized with simple equipments. We are developing a high-speed profile measurement method of a moving object using three linear sensors set in parallel. In this paper, we propose a profile inspection method with three linear sensors by the intensity ratio method.