- 著者
- 田中 義信 井川 直哉
- 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.26, no.302, pp.149-154, 1960
The authors have made investigations about diamond wheel grinding in which plunge cut method by plain cup diamond wheels of bronze bonded was adopted. In this paper the influences of the diamond concentration of the wheel on stock removal is discussed theoretically and experimentally. And surface roughness produced in the grinding tests is also described.<BR>Theoretical investigation shows the tendency that stock removal decreases with the increase of the diamond concentration of the wheel if assumed the wheel having the abrasive grains whose tip has spherical shape, and the similar tendency was recognized in the grinding tests to some extent.<BR>Characteristics of the stock removal-normal grinding force (or contact pressure between the wheel and work surface) for a diamond wheel was clarified.<BR>It is also known that surface roughness <I>H</I><SUB>max</SUB> decreases with the increase of the diamond concentration of the wheel.
- 著者
- 井出 敞 森 勇蔵 紺田 功 井川 直哉 八木 秀次
- 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.57, no.5, pp.887-892, 1991-05-05
- 被引用文献数
- 1 1
A new approach to prepare diamond-like carbon film was made by highly accelerating ultra-fine carbon black particles between plane-parallel electrodes held at DC high voltage in 10^<-4> Torr, and by making the energetic particles deposit onto the surfaces of electrodes used as substrate. It became clear that amorphous hard carbon films grow only on cathode surface without heat generation and the growth rate depends on the rate of kinetic-energy flux given by the particles striking unit cathode area. The average growth rate of about 10 nm/min was obtained using a 180 mm dia. cathode with relatively low power supply. As for the properties of film prepared, the Vickers hardness value larger than 1 500 kgf/mm^2 and the semiconductive hopping conduction were observed, which are quite different from carbon black used. These suggest that the graphitic starting material may be transformed into considerably disordered carbon structure due to severe solid-to-solid impact, and a diamond-like carbon film of graphite rich may be formed.