南京航空航天大学学报（英文版）2020，Vol.37Issue(3)：434-445,12.
基于流固耦合的深孔枪钻加工冷却液对切屑成形的影响
Influence of Coolant on Chip Forming in Gun-Drill Based on Fluid-Solid Coupling Method
摘要
Abstract
Chip shape is one of the important factors that affect the processing quality of the deep hole. The flow field of 17 mm standard gun-drill is simulated by taking the coolant pressure as a single factor variable,and the influence of coolant pressure on chip forming is discussed by combining with experiments in this paper. The results show that at the initial stage of chip forming,the flow of cutting fluid will intensify the lateral crimp of chips,and then affect the crimp radius of the chip and the number of turns of the crimp screw. The lateral crimp degree increases first and then decreases with the increase of coolant pressure,and the crimp degree is the smallest at 3 MPa. In addition,during the chip removal process,the stream shrinking in the flow field is the main influencing factor that drive and force the chip to break again,and their influence on the chip removal and chip breaking is proportional to the coolant pressure.关键词
枪钻/切屑成形/Ti6Al4V钛合金/流固耦合Key words
gun drill/chip deformation/Ti6Al4V titanium alloy/fluid-solid coupling分类
矿业与冶金引用本文复制引用
李亮,薛虎,单以才,杨吟飞,何宁..基于流固耦合的深孔枪钻加工冷却液对切屑成形的影响[J].南京航空航天大学学报（英文版）,2020,37(3):434-445,12.基金项目
This work was supported in part by the National Natural Science Foundation of China (No. 51505409),the Six Talent Peak Project in Jiangsu Province (No. GDZB-080),and the Natural Science Research in Ji-angsu Province(No.17KJB460008). The authors would like to acknowledge LIU JingJing and WU Peng for their assis-tance. （No. 51505409）
