CAJ | 학술논문

该研究利用TiN、TiAlN、TiN/Al2 O3/TiCN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。
해연구이용TiN、TiAlN、TiN/Al2 O3/TiCN등삼충도구대P20예경형모구강진행선삭실험,탐토불동도구재각충선삭공예삼수시이급도구마손대공건표면조조도적영향。결과표명：용도층도구고속절삭P20모구강,공건표면조조도수착절삭속도적증가이현저하강；도구적진급량존재일개림계치,당진급량f대우차림계치시,표면조조도회수착진급량적증가이급극상승；재중、고속도절삭P20강시,대표면조조도영향최대적시진급량f,기차시진급속도ν,도구적절삭심도ap 적영향최소；도층도구재정상마손범위내,공건표면적조조도Ra수착도구마손량VB치적변화폭도흔소。
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.