著者

山元 弘 茂木 正晴 大槻 崇 柳沢 雄二 野末 晃 山口 崇 油田 信一

出版者

The Society of Instrument and Control Engineers

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.48, no.8, pp.488-497, 2012 (Released:2012-09-01)

参考文献数

18

被引用文献数

2 6

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Civil engineering work still involves many dangerous and grueling tasks. So improving work environments and ensuring safety are important challenges facing in this field. It is also essential to develop to prepare for the aging of construction workers and growing shortage of young skilled workers, which will occur in response to the falling birthrate and aging of the future population. This research project was undertaken as challenges to overcome these problems by developing the basic technologies for automated construction system using the three-dimensional information and achieving self-controlled operation by hydraulic excavators which is a typical general purpose construction machine. The developed prototype excavator has achieved the self-control of soil excavation and loading work, with the almost same speed and with the same precision in finished product to those of normal work by human worker.

著者

服部 和史 野末 晃志 山川 正克 石澤 隆 藤原 正尚 吉田 広明 五十川 幸宏

出版者

大同特殊鋼株式会社

雑誌

電気製鋼 (ISSN:00118389)

巻号頁・発行日

vol.76, no.2, pp.135-140, 2005

被引用文献数

1

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SUS630 is a martensitic precipitation hardened stainless steel having high strength and the good corrosion resistance comparable with SUS304, and used as stern shaft, high strength bolts, and the golf club faces, etc. In golf club faces, thickness of face steel had been 2.3 mm or more to secure durability. To obtain better "Carry" and "Impact feeling" by nonconventional high restitution face, thickness of the face was expected to be possible by thinning by 2.0 mm or less. However, to thin the thickness of the face, a strong material was necessary to secure durability, and application of ausforming process for SUS630 was proposed. Through ausforming process for SUS630 in forging test, tensile strength was closed to 1500 MPa because of the effect of ausforming. To mass-produce the ausformed SUS630, hot rolling process through ausforming was selected from the point of view in production cost, production variation, and constraint on machine. Ausforming process in finish rolling with application of 80 % high reduction in rough rolling with a view of strengthening and more toughness by refining austenitic grain size, named as Combined Ausforming Process (C-AF), was specified on hot rolling process, and hardness has achieved from 480HV to 510HV after aging treatment. Strengthening of SUS630 with C-AF rolling process made it possible to be adopted as golf club face material with high restitution by thinning thickness by 2.0 mm or less.