摘要
采用2种不同磨料砂带对304不锈钢进行了工艺试验,对磨削后工件表面粗糙度及砂带磨损表面形貌进行了观测。讨论了磨削时间和法向磨削压力对表面粗糙度的影响。在磨粒磨损理论模型的基础上,揭示了砂带的磨损机理。分析了锆刚玉和碳化硅磨粒的自锐过程。结果表明,在磨削时间小于8s时,表面粗糙度Ra值随磨削时间快速减小,当磨削时间大于20s时,Ra的大小与接触轮硬度的关系不大。Ra随着法向磨削压力的增加而减小,当法向磨削力在60～80N时,表面粗糙度有稳定的较小值。锆刚玉磨料有较强的自锐作用,以缓慢钝化磨损为主;而碳化硅磨粒则出现局部脱落、较大的磨损小平面和严重的黏盖磨损。
Process tests of belt grinding for 304 stainless steel were conducted with two kinds of abrasive grains.The surface roughness and the surface topography of belt wear were observed.The influence of grinding time and normal grinding force on surface roughness were discussed.The wear mechanism of belt wear was revealed based on a model of abrasive grain＇s wear.The self-sharping processes of silicon carbide and zirconia were analyzed.It has been shown that surface roughness Ra values are rapidly deceased when grinding time is less than 8s.The Ra values seem to be independent of the roller＇s hardness when the grinding time is over 20s.The Ra values are deceased with normal grinding force increasing.The optimum surface roughness can be reached when the normal grinding forces are between 60N and 80N.Zirconia has a better ability of self-sharping and the wear process is dominated passivation wear.Abrasive grains partial loss,larger wear small planes and serious cover wear are observed on silicon carbide abrasive grains.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2011年第3期291-295,共5页
China Mechanical Engineering
基金
重庆市科技攻关项目(CSTC2007AB3004)
作者简介
黄云，男，1962年生。重庆大学机械工程学院教授，重庆市材料表面精密加工及成套装备工程技术研究中心主任。主要研究方向为高效精密砂带磨削技术与砂带磨床设计制造。出版专著2部，发表论文90余篇。
杨春强，男，1984年生。重庆大学机械工程学院硕士研究生。
黄智，男，1977年生。重庆大学机械工程学院博士研究生，重庆市材料表面精密加工及成套装备工程技术研究中心高级工程师。
