Fabrication of Abrasive Layer Using Dispersion of Hard Powder by Electrical Discharge Machining (2nd Report) - Evaluation of Abrasive Layer through Grinding Process

摘要

This paper deals with a fabrication method for a grinding wheel by electrical discharge machining (EDM) and its evaluation through practical grinding. When the total life of the grinding wheel has ended, the grinding wheel is thrown away although its core is still usable. Depositing an abrasive layer by EDM with a green compact electrode is proposed to fabricate a recyclable grinding wheel for cost reduction. Some metallic disks were practically ground with a #400 SiC abrasive layer. The grinding ratio against steel was 6.9. Then the deposit process for a cylinder was proposed to fabricate and recycle a mounted wheel. The maximum difference for a thickness of 300 μm was 10 μm by the shape feedback machining method. Although the additional layer was deposited without any cleaning in the recycle process, it performed as well as a new one. Therefore, the abrasive layer fabricated by EDM can be used for grinding.