Abstract
This paper deals with the effects of free abrasive grains added to grinding fluid in grinding. Austenitic stainless steel SUS 304 and sintered silicon nitride Si3N4 were ground using a cBN and a diamond metal bonded wheel, respectively. Alumina grains were used as free abrasive grains. The grinding force and the finished surface roughness were examined. It was clarified that in SUS304 grinding, free abrasive grains added to fluid acted effectively as loading-free agents on cBN grains without increasing the grinding force. Therefore, grinding efficiency was improved by 2-4 times. While, in sintered silicon nitride, free abrasive grains reduced the increase rate of the grinding force because they acted as dressing agents.
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