A coolant supply system from the inside of a superabrasive grain electrodeposition grinding wheel was developed. The system can supply coolant to the grinding point efficiently by utilizing the many thin slits on the electrodeposition wheel as coolant flow channels. With S45C steel as the test material, the specific grinding force and grinding temperature using a electrodeposited CBN wheel were lower than those using a vitrified bonded WA wheel. The system can yield good dimension accuracy because the core of the wheel is cooled and expansion is reduced.

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In this study, the ELID (Electrolytic In-process Dressing) polishing process was applied to a Co-Cr alloy that is used in artificial joints. The surface of the material was modified during the polishing process to give improved properties. Corrosion and wear characteristics were evaluated by the pin-on-disk testing method in a pseudo-body fluid environment. We found that a stable modified layer was formed on the surface by the ELID process, leading to improvement of corrosion resistance in friction environments.

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In polishing, a conditioning process is generally used for the regeneration of pad surface asperity. The pad surface asperity affects the polishing performance, and so it is important to develop a method for its evaluation. In this paper, we propose a novel evaluation method for the in-plane micro-deformation distribution of pad surface asperity using digital image correlation (DIC) method. The results indicated that the pad surface deforms over 40μm at maximum with the conditioning process. Moreover, the following points were observed. (1) The in-plane deformation value decreases with an increase in the mesh size of conditioner grains. (2) The in-plane deformation value increases with the increases in both the conditioning time and the applied contact pressure.

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Rapid Rotation Mirror-like surface Grinding (RRMG) is a process that has the potential to achieve highly efficient mirror-like surface grinding and to obtain high-quality surfaces, such as a very small heat-affected layer. The authors have produced a new ultra-high speed grinding unit consisting of an ultrafast wheel spindle, work spindle, and truing device to achieve RRMG. In addition, the relationship between the microstructure of a vitrified cBN grinding wheel and Truncate Truing with Micro Dressing (TTMD) conditions was investigated to confirm the characteristics of TTMD in detail. The results indicated that surface roughness of cBN abrasive grain was decreased by decreasing truing lead.

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This study was performed to investigate the effects of injection speed and polishing time on the machined surface properties of carbide material in the blast polishing process. The results indicated that when injection speed was 21.4 m/s or more, the surface roughness value decreased quickly with increases in polishing time, and was almost saturated at a certain polishing time. The saturated surface roughness value of each injection speed decreased with increasing injection speed. The surface roughness value reached saturation more quickly at higher injection speeds.

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