STUDY OF ENVIRONMENTALLY CONSCIOUS CBN COOLING-AIR GRINDING TECHNOLOGY

The conventional grinding method uses fluid that contains chlorine, su lfur and phosphorus which aggravates the working environment and incre ases costs for fluid replacement and disposal. We developed the coolin g-air CBN grinding system, which performs grinding by supplying coolin g air to the grinding point with a solid-lubricant-impregnated CBN whe el or a CBN wheel supplied with an extremely small amount of superfine vegetable oil. This method provides better grinding performance compa red with grinding under fluid. The compressive residual stress of work pieces ground using our method are higher and deeper compared with CBN grinding under fluid, and the material strength of workpieces is high er even under high-efficiency grinding.