摘要
本文通过对二维超声磨削纳米复相陶瓷的磨削特性进行理论分析及试验研究,尤其是磨削力的特性及其影响因素,从而探索磨削加工表面质量的影响因素并提出改善磨削效果的措施。研究结果表明,磨削力随着切深的增大而增大,随着磨削深度的进一步增加,超声振动在磨削加工中所起的作用减弱;二维超声振动磨削大大扩大了复相陶瓷磨削的塑性加工区域,二维超声振动磨削过程的塑性域是磨削深度小于5μm,而普通磨削塑性域是在磨削深度小于2μm;适当增大磨削速度,既可以增强磨削砂轮的自锐能力,获得较高的去除率,又可以增加塑性变形,改善工件的表面质量;砂轮线速度的变化对二维超声振动磨削过程中的磨削力影响比对普通磨削过程中的磨削力的影响小,故二维超声振动磨削可以选用较大的砂轮线速度;工件速度对二维超声振动磨削表面粗糙度影响很大,其值随着工件速度的增加而增大。
In the present paper theoretic analysis and experiment research on grinding features in two dimensional ultrasonic grinding nano - complex ceramics were carried out. Especially characteristics of grinding force and its influencing factors were of interest. Influencing factors on ground surface quality were discussed, and measures improving grinding effect were put forward. According to the test results, for two dimensional ultrasonic grinding, grinding force increases along with depth of cut and further the effect of ultrasonic vibration on the process weakens; the critical ductile depth of cut in two dimensional ultrasonic grinding is 5μm, while 2μm in traditional grinding; the rise of grinding speed not only enhance the self - sharp ability of grinding wheel to achieve better removal ratio, but develop plastic deformation to improve surface quality; the wheel velocity in two dimensional grinding has less effect on the grinding force than that in traditional grinding, therefore, a higher wheel velocity is exploited in two dimensional grinding; workpiece speed has great effect on the surface roughness of ground material in two dimensional grinding, and the surface roughness increases along with workpiece speed.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2006年第4期62-64,67,共4页
Diamond & Abrasives Engineering
关键词
硬脆性材料
表面质量
超声磨削
纳米复相陶瓷
hard and brittle material
surface quality
ultrasonic grinding
nano-complex ceramics
