SiCp/Al窄槽的铣磨实验研究(Ⅱ)——表面粗糙度  

Experimental research on mill-grinding SiCp/Al narrow slot Part Ⅱ: surface roughness

作　　者：李建广[1] 姚英学[1] 赵航[1] 李大博[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2012年第9期57-61,共5页Journal of Harbin Institute of Technology

基　　金：教育部博士点基金资助项目(200802130006);2010哈尔滨市科技创新人才研究专项资助项目(RC2010XK006003)

摘　　要：针对SiCp/Al构件加工中大去除余量、高精度的需求,以铣磨加工窄槽为对象,实验研究电镀金刚石砂轮铣磨加工SiCp/Al窄槽中的加工参数、铣磨工具对已加工表面粗糙度的影响.实验分析表明:铣磨速度、进给速度、砂轮粒度和结构对SiCp/Al铣磨表面的粗糙度有显著影响,砂轮速度对表面粗糙度的影响呈鞍型,先降后增;表面粗糙度随进给速度的增大而增大;不开槽砂轮可获得低粗糙度的表面.采用降低进给速度,提高砂轮速度,不开槽砂轮可获得低粗糙度的加工表面.在实验条件下,最佳铣磨参数组合是磨削速度9.42 m/s,进给速度20 mm/min;如采用开槽砂轮铣磨窄槽,则铣磨工具的容屑槽螺旋角可选50°.To meet the need on machining SiCp/Al surface with high efficiency and accuracy, with electroplated diamond grinding wheel and taking mill-grinding narrow slot as a typical example, the influence of machining parameters and mill-grinding tool on SiCp/Al machined surface roughness was experimentally investigated. The results show that the machining parameters and mill-grinding tool both have significant influence on the surface roughness. The influence of grinding speed on crease while the roughness is increased as fed roughness appears saddle-shaped, i.e. decreased first, then in- erate increasing. The grinding wheel without flutes can produce lower roughness than that with flutes. Therefore, higher grinding speed, lower federate with fluteless grinding wheel are recommended. Under the given experimental conditions, the optimum combination of machining parameters are grinding speed of 9. 42 m/s and federate of 20 mm/min. And if a fluted grinding wheel will be ap- plied to machine narrow slot, the recommended helix angle of the flutes is about 50° to achieve lower roughness.

关 键 词：碳化硅颗粒增强铝基复合材料 铣磨 表面粗糙度 加工参数 铣磨工具 

分 类 号：TG506.9[金属学及工艺—金属切削加工及机床]