摘要
以压痕断裂力学模型和硬脆材料去除机理为理论基础,对氧化锆陶瓷的表面损伤进行研究,结合砂轮特征及磨削力公式建立了普通磨削和超声振动磨削的横向裂纹和表面破碎率模型,并对实验所得材料表面进行图像处理。结果表明:横向裂纹和表面破碎率随着磨削深度增大而增大,与普通磨削相比,超声振动磨削降低了45%裂纹长度,降低了23%表面破碎率,具有更完整的表面形貌特征。
Based on the indentation fracture mechanics model and the removal mechanism of hard and brittle materials, the surface damage of zirconia ceramics is studied.Combined with the characteristics of grinding wheel and the formula of grinding force, the transverse crack and surface breakage rate models of ordinary grinding and ultrasonic vibration grinding are established, and the material surface images obtained from the experimental observations are processed.The results show that the transverse crack and surface breakage rate increase with the grinding depth.Compared with ordinary grinding, ultrasonic vibration grinding can reduce the crack length by 45% and the surface breakage rate by 23%,and the better surface topography is obtained.
作者
尤佳旗
黄久超
丁霖
You Jiaqi;Huang Jiuchao;Ding Lin(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,China)
出处
《工具技术》
北大核心
2022年第6期52-56,共5页
Tool Engineering
关键词
超声振动磨削
横向裂纹
表面破碎率
ultrasonic vibration grinding
transverse crack
surface breakage rate
