切削参数对P20模具钢的表面粗糙度影响  

Effect of Cutting Parameters on the Surface Roughness of P20 Die Steel

作　　者：王敏毅[1] 黄颖[2] 韩正威 林有希[3] 

机构地区：[1]福州职业技术学院交通工程系,福州350108 [2]福建师范大学化学与材料学院,福州350007 [3]福州大学机械工程及自动化学院,福州350108

出　　处：《组合机床与自动化加工技术》2014年第11期19-22,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金(51075074);福建省科技厅项目(JK2010008);福州职业技术学院教学改革立项项目(2009A002);福州职业技术学院科学研究项目(ZYKYKJAA13001)

摘　　要：该研究利用Ti N、Ti Al N、Ti N/Al2O3/Ti CN等三种刀具对P20预硬型模具钢进行铣削实验,探讨不同刀具在各种铣削工艺参数时以及刀具磨损对工件表面粗糙度的影响。结果表明:用涂层刀具高速切削P20模具钢,工件表面粗糙度随着切削速度的增加而显著下降;刀具的进给量存在一个临界值,当进给量f大于此临界值时,表面粗糙度会随着进给量的增加而急剧上升;在中、高速度切削P20钢时,对表面粗糙度影响最大的是进给量f,其次是进给速度ν,刀具的切削深度ap的影响最小;涂层刀具在正常磨损范围内,工件表面的粗糙度Ra随着刀具磨损量VB值的变化幅度很小。In this paper, TiN, TiAlN, TiN/Al2 O3/TiCN three tools were used for milling experiments for P20 die steel. The effects of various milling process parameters and tool wear of three tools on the surface roughness of the workpiece were studied in detail. The results showed that in high speed,the surface rough-ness of the workpiece decreased significantly along with the increase of cutting speed when coated tools was used to high speed cutting die steel P20. There exists a critical value for the tool feed and when feeding f was greater than the critical value, the surface roughness will rise sharply with the increase of feed. In medi-um and high speed cutting P20 steel, the biggest effect on surface roughness was feeding f, followed by feed rate ν and the influence of tool cutting depth ap was minimum. Within the range of the normal wear of coated tools, workpiece surface roughness of Ra as the change of quantity of tool wear VB value was very small.

关 键 词：切削参数 高速铣削 涂层刀具 表面粗糙度 

分 类 号：TH162[机械工程—机械制造及自动化] TG506.1[金属学及工艺—金属切削加工及机床]