氧化铝陶瓷ELID高效磨削技术的研究

陶瓷材料具有优异的机械性能，其应用越来越广泛。然而由于陶瓷的高硬度及其易碎性使其难于加工。在线电解修整磨削技术已经被应用于硬脆材料的超精密加工，由于可以实现砂轮的在线修整，尤其被广泛应用于细粒度砂轮的磨削中。本文在平面磨床上应用铸铁结合剂金刚石砂轮与ELID磨削技术进行高效磨削研究。实验结果表明，在同样的磨削条件下，采用ELID磨削时的磨削力约为使用树脂结合剂砂轮磨削力的2／5～3／5。实验结果说明采用ELID磨削技术加工效率可以得到极大提高。而且，在线电解修整作用可以保持砂轮的锋锐性，有利于保持硬脆材料高效磨削的连续性。

HIGH-EFFICIENCY GRINDING OF ALUMINA CERAMIC PARTS WITH ELID TECHNOLOGY

Alumina ceramic parts are used broadly due to their excellent physical, chemical and mechanical properties. Ceramics are extremely difficult to machine because of their high hardness and brittleness. Electrolytic in-process dressing (ELID) grinding has been adopted to the ultra precision machining of hard and brittle materials. It had been widely used in fine abrasive grinding for its in-process dressing. Cast iron bond diamond wheel and ELID grinding technology are used on a surface grinder to research the high efficiency grinding technique. On the same machining conditions, the grinding force is about 2/5 - 3/5 as the force when using resin bond wheel. The result indicates that the grinding efficiency can be improved by applying ELID grinding technology. In-process dressing keeps the grinding wheel sharp, which is benefit to the continuous grinding.