著者

上田 隆司 花見 真司 平野 聡 山本 明

出版者

公益社団法人精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.51, no.6, pp.1195-1200, 1985-06-05

被引用文献数

6

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Influence of the bonding material of a diamond stick is investigated on honing performance. Three kinds of synthetic diamond sticks are used, that is, a metal bonded stick, a resinoid one and a vitrified one. For the metal bonded stick its bending strength is changed to find out the suitable bonding strength. Workpieces are alumina AI_2O_3,silicon nitride Si_3N_4 and silicon carbide SiC, which are sintered under atmospheric pressure. The results are as follows. The metal bonded diamond stick is most suitable for the effective honing of these three ceramics. In this stick, there is an advisable value of bending strength σ_b to get high productivity, namely, 120-140 MPa for AI_2O_3 and 80-100 MPa for Si_3N_4 and SiC honing, and these are less than the ordinary value 200 MPa at metal honing. This comes from necessity of creating some new cutting edges in operating. Then, the diamond grain with high toughness is recommended. Using the vitrified bonded stick and the cubic boron nitride grain is not advisable.

著者

廣瀬 直也 細川 晃 上田 隆司 古本 達明 小谷野 智広

出版者

公益社団法人 精密工学会

雑誌

精密工学会学術講演会講演論文集 2014年度精密工学会秋季大会

巻号頁・発行日

pp.205-206, 2014-09-01 (Released:2015-03-01)

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CFRP(Carbon Fiber Reinforced Plastic)はその高強度さ故に工具摩耗が著しく,現在は主としてダイヤモンドコーティング工具が用いられている.本研究では,ダイヤモンドに比べて安価なDLC(Diamond Like Carbon)コーティングエンドミルを用い,切れ刃への負荷が小さい強ねじれエンドミルによる傾斜切削の有効性を検討している.実験はDLC膜厚が仕上げ面性状に及ぼす影響をダイヤモンドコーティングエンドミルと比較しながら検討している.

著者

上田 隆司 平井 佑樹 社本 英二

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.856, pp.17-00344-17-00344, 2017 (Released:2017-12-25)

参考文献数

12

被引用文献数

3

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In high speed turning, six kinds of materials, namely, Ti-6Al-4V, Inconel718, SUS304, S50C, Copper and Aluminum are machined with a ceramic cutting tool in order to investigate the influence of the cutting speed on the temperature of the cutting tool experimentally. The cutting temperature is measured by the two-color pyrometer with an optical fiber which is developed by the author. In cutting of Ti-6Al-4V and Inconel718 with Al2O3 ceramic tool, the cutting temperature increases with the increase of cutting speed and approaches to the melting points of the workpiece materials. The thermal conductivities of these difficult-to-cut materials are small, and Al2O3 ceramic has a small thermal conductivity and maintains a high strength even at the temperature of about 1000°C. In the cases of Copper and Aluminum, their thermal conductivities are much larger than those of Ti-6Al-4V and Inconel718, so that the cutting temperature increases so slowly with the increase of cutting speed that it is difficult to approach to the melting points of the workpiece materials.