Papers by Keyword: Electro-Discharge Truing

Abstract: Metal and resin bonded diamond wheels were trial manufactured from boron doped diamond grits possessing electrical conductivity and high oxidation temperature. From the results of the investigation on the electro-discharge truing performance, a high truing efficiency along with the possibility of formation of cutting edges on the grits was confirmed. According to the results of the grinding experiment performed using this grinding wheel with flattened abrasive tips, a remarkable improvement in the work surface roughness could be achieved. Furthermore, from the results of the grinding test on cemented carbide and optical glass using the boron doped diamond grits wheel, the grinding ratio was found to increase significantly, whereas the surface roughness improved compared to a conventional diamond grits (similar friability) wheel.

Abstract: In V-groove ELID grinding process, to achieve optimal grinding performance and satisfactory surface quality and profile accuracy, metal bonded diamond grinding wheels need to be carefully sharpened. In this paper, we applied the proposed new micro-truing method consisting of electro-discharge truing and electrolysis-assisted mechanical truing to sharpen the edge of large grinding wheels. The minimum wheel tip radiuses of 6.3 and 8.5µm were achieved for the #4000 and #20000 grinding wheels. The truing mechanisms and sharpening performance are also discussed.

Abstract: Metal bonded diamond grinding wheels are widely used in the grinding process, especial in ELID grinding. However, truing is difficult owing to the high toughness of metal bond materials and high hardness of diamond abrasives. To realize high precision and high-efficiency truing, we propose a new micro-truing method consisting of electro-discharge truing and electrolysis-assisted mechanical truing in this paper. The process principle and fundamental experimental results are introduced, and the truing performance is discussed. Research results show that the proposed new method is effective for truing metal bonded diamond grinding wheels.