粘结磁性磨料制备及其研抛加工研究  

The Research of Bonded Magnetic Abrasives Used in Magnetic Finishing

作　　者：孟利[1] 阎秋生[1] 高伟强[1] 邱腾雄[1] 唐振宇[1] 

机构地区：[1]广东工业大学,广东广州510006

出　　处：《机电工程技术》2007年第12期28-31,共4页Mechanical & Electrical Engineering Technology

基　　金：广东省科技计划项目(编号:2005B50101018);广州市科技计划项目(编号:2005Z3-D0021)

摘　　要：采用粘结法制备磁性磨料,对磨料制备工艺进行了优化,确定了最终的工艺方案。通过实验对所制备的粘结磁性磨料进行了性能分析,结果表明磁性磨料粒度为40目时研磨效果最佳,用于模具钢的磁性研磨原始表面Ra1.87微米经过4分钟加工可降低到Ra0.4微米左右;氧化铝磁性磨料比碳化硅磁性磨料具有更好的耐用度,持续研磨加工时间可达16分钟;研磨初期工件表面粗糙度快速降低,之后降低趋于平缓;采用由粗到细的磁性磨料分步加工可有效降低表面粗糙度值、缩短加工时间,原始表面Ra2.092微米经过40目、60目、80目磁性磨料各加工4分钟后粗糙度可以达到Ra0.11微米。Fe+ Al2O3,and Fe+ SiC bonded magnetic abrasives are prepared,the suitable particle size is 40 mesh which has the best finishing effect.In the magnetic abrasive finishing of module steel,the surface roughness Ra 1.87 micron can be lowered to Ra 0.4 micron or so in 4 minutes.The magnetic abrasives bonded together with iron and alumina have much better durable degree than silicon carbide magnetic abrasives,the time keeping on finishing can reach to 16 minutes.In early processing,the surface roughness lowers quickly,then slowly.Using magnetic abrasives from big size to small size finishing the same surface step-by-step can lower surface roughness and shorten the process time effectively.Finished 4 minutes separately through 40 mesh,60 mesh and 80 mesh,the original surface Ra 2.092 micron can be lowered to Ra 0.11 micron.

关 键 词：磁性研磨 粘结磁性磨料 模具钢 

分 类 号：TG732[金属学及工艺—刀具与模具]