南京航空航天大学学报（英文版）2020，Vol.37Issue(1)：164-174,11.
Ti6Al4V钛合金深孔枪钻加工切屑成形机理
Chip Formation Mechanism of Deep-Hole Gun Drilling of Ti6Al4V Titanium Alloy
摘要
Abstract
During the process of deep-hole gun drilling,the shape of the chip is a significant factor affecting the finalquality. The relationship between chip forming mechanism and process parameters has always been a complicated problem in deep-hole drilling. This paper investigates Ti6Al4V titanium alloy to address this issue. First,the four processes and influencing factors of forming spiral chips are analyzed theoretically. Second,the fracture mechanism of chips in drilling Ti6Al4V titanium alloy is analyzed by scanning electron microscopy. Finally,the influences of cutting speed,feed rate and coolant oil pressure on chip shape are analyzed through drilling experiments and fluid simulation. The relationship between chip compression ratio and surface roughness is obtained through chip thickness measurement. This research can provide a guide for optimizing parameters of deep-hole gun drilling on Ti6Al4V titanium alloy.关键词
切屑成形/枪钻/Ti6Al4V钛合金/表面粗糙度Key words
gun drill/titanium alloy/chip deformation/surface roughness分类
矿业与冶金引用本文复制引用
李亮,何宁,薛虎..Ti6Al4V钛合金深孔枪钻加工切屑成形机理[J].南京航空航天大学学报（英文版）,2020,37(1):164-174,11.基金项目
This work was supported in part by the National Natural Science Foundation of China (No. 51505409),the Jiangsu Postgraduate Research and Practice Innovation Program (SJCX18_0884). （No. 51505409）
