工程陶瓷小砂轮轴向大切深缓进给磨削加工的砂轮磨损分析

小砂轮轴向大切深缓进给磨削以较大切深实现了较高的材料去除率,且使用的砂轮直径比常规磨削用砂轮小很多,我们针对这一特点开展了研究。实验通过改变砂轮转速、工件转速和磨削深度等加工参数,对轴向大切深缓进给磨削加工后的砂轮表面进行了形貌观测和磨损分析。分析表明,砂轮各部分的磨损形式与其在磨削过程中所起的作用有关:砂轮端面是磨削加工的主磨削区,磨粒和结合剂主要发生较大程度的磨损;砂轮圆周面主要对已加工表面进行修磨,因而结合剂和磨粒磨损为主要磨损形式;砂轮拐角作为过渡磨削区,承受的磨削力也比较大,而且由于磨粒与结合剂的结合力相对较小,因此易发生磨粒和结合剂的脱落。

Wear analysis of small grinding wheel during axial deep creep-feed grinding of engineering ceramics

Axial deep creep-feed grinding with small grinding wheel can achieve a high material removal rate. The morphology feature and wear of such small grinding wheel after axial creep-feed grinding were analyzed by changing the wheel speed, workpiece speed and grinding depth. The results indicated that the abrasive grits and bond in grinding wheel end face were worn seriously as it was the main grinding area; the periphery surface of the wheel played a role of trimming the machined surface, so it was not worn so much ; while at the corner of the wheel which was the transitional zone, the grinding force was relatively intensive and the holding force of the bond to abrasive grits was relatively poor, so the abrasive grits came off easily and the bond was worn off in large area.