工程陶瓷高速深磨中声发射的实验研究

建立了工程陶瓷高速深磨中声发射的实验系统,自主开发了其中的声发射信号虚拟仪器采集系统.对部分稳定氧化锆(PSZ)和氧化铝进行了高速深磨声发射的实验研究,分析了磨削参数和工程陶瓷材料对声发射信号的影响.研究了砂轮修整前后声发射信号的变化.结果表明,即使在砂轮超高速和大切深下,声发射增加仍较小.选择砂轮超高速、大切深和小的工作台速度对高效低成本磨削工程陶瓷是有利的.运用声发射还可对砂轮磨损状态进行在线监测.

Experimental Study on the Acoustic Emission of High Speed Deep Grinding of Engineering Ceramics

An acoustic emission(AE) test rig with signal acquisition virtual instrument system has been developed for engineering ceramics high speed deep grinding.By using the AE test rig,the AE signals of the high speed deep grinding of partially stabilized zirconium(PSZ) and alumina were studied.And the changes of AE signals with different grinding parameters in the grinding of the PSZ and the alumina were analyzed.The AE signals were compared before and after the dressing of the grinding wheel.The results have indicated that the strength of AE increases slightly under super high wheel speed and large depth of cut.The AE effective value increases with the workpiece feedrate.It can be a good choice for grinding engineering ceramics in high efficiency and lower costs to use super high wheel speed,large depth of cut and relative small workpiece feedrate.The AE signal may also be used for the on-line monitoring of grinding wheel wear.