15-5PH 不锈钢深孔枪钻加工切屑成形的机理分析

doi:10.12141/j.issn.1000-565X.190414

华南理工大学学报（自然科学版） ›› 2020, Vol. 48 ›› Issue (3): 91-99,107.doi: 10.12141/j.issn.1000-565X.190414

15-5PH 不锈钢深孔枪钻加工切屑成形的机理分析

李亮^1,2 杨吟飞^1†薛虎² 何宁¹

１．南京航空航天大学机电学院，江苏南京 210016；２．盐城工学院机械工程学院，江苏盐城 224051

收稿日期:2019-07-03 修回日期:2019-11-04 出版日期:2020-03-25 发布日期:2020-03-01
通信作者: 杨吟飞（1982-），男，博士，副教授，主要从事深孔加工、精密制造研究。 E-mail:yangyf＠nuaa.edu.cn
作者简介:李亮（1981-），男，博士，副教授，主要从事枪钻加工、高速加工研究。E-mail:jzlliang@ 163.com
基金资助:
国家自然科学基金资助项目（51505409）；江苏省研究生科研与实践创新计划项目（SJCX18_0884）；江苏省六大人才高峰项目（GDZB-080）

Study on Chip Formation Mechanism of Deep Hole Gun Drilling of 15-5 PH Stainless Steel

LI Liang^1,2 YANG Yinfei¹ XUE Hu² HE Ning¹

1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2. School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, China

Received:2019-07-03 Revised:2019-11-04 Online:2020-03-25 Published:2020-03-01
Contact: 杨吟飞（1982-），男，博士，副教授，主要从事深孔加工、精密制造研究。 E-mail:yangyf＠nuaa.edu.cn
About author:李亮（1981-），男，博士，副教授，主要从事枪钻加工、高速加工研究。E-mail:jzlliang@ 163.com
Supported by:
Supported by the National Natural Science Foundation of China (51505409), the Graduate Research and Practice Innovation Program of Jiangsu Province (SJCX18_0884) and the Six Talent Peak Projects in Jiangsu Province (GDZB-080)

摘要/Abstract

摘要： 深孔枪钻加工过程中，被加工孔直径小、孔深长，切屑形貌是影响其加工质量的一个重要因素，并且切屑的成形机理和与工艺参数之间的关系也一直是深孔加工研究的难点。本研究以15-5PH 不锈钢为研究对象，通过对切屑的流动过程分析，研究枪钻加工螺旋形切屑成形的过程和影响因素。借助扫描电镜检测切屑断面不同点的形貌，研究15-5PH 不锈钢枪钻加工切屑的断裂机理。通过改变切削速度、进给量和油压的试验，分析了不同工艺参数下的切屑变形规律。借助 ANSYS-FLUENT 仿真软件，分析不同油压枪钻前刀面刃口的流体压力和湍流动量，阐述了切屑变形与油压的影响关系。研究发现15-5PH 不锈钢深孔枪钻加工切屑属于“准解理断裂”，切屑形貌与枪钻工艺参数选择密切关联；本研究的结果对15-5PH 不锈钢深孔枪钻加工工艺参数和冷却液油压的优化选择具有指导意义和参考价值。

关键词: 切屑成形, 枪钻加工, 15-5PH 不锈钢, 断裂机

Abstract: Chip shape is an important factor affecting the processing quality of the deep hole gun drilling, because the hole is too small and deep. The relationship between chip forming mechanism and process parameters has long been a difficult problem in deep hole gun drilling research. Taking 15-5PH stainless steel as the research object, the research explored the process and influencing factors of spiral chip forming by analyzing the chip flow process. The fracture mechanism of 15-5PH stainless steel gun drilling chips was studied with scanning electron microscope. The chip deformation rule under different process parameters was studied through experiments with varied cutting speed, feed, and oil pressure. The relationship between chip deformation and oil pressure was clarified by analysing fluid pressure and turbulent momentum on the cutting edge of gun drilling under different oil pressure with ANSYS-FLUENT. The study shows that the fracture mechanism of chips processed by 15-5PH stainless steel gun drill belongs to “quasi-cleavage fracture” and the chip morphology is closely related to the technical parameters of the gun drill. The research results can provide guidance and references for the selection of processing parameters and coolant oil pressure of deep hole gun drilling of 15-5PH stainless steel.

Key words: chip formation, gun drilling, 15-5PH stainless steel, fracture mechanism

中图分类号:

TG713
TH161

李亮, 杨吟飞, 薛虎, 等. 15-5PH 不锈钢深孔枪钻加工切屑成形的机理分析[J]. 华南理工大学学报（自然科学版）, 2020, 48(3): 91-99,107.

LI Liang, YANG Yinfei, XUE Hu, et al. Study on Chip Formation Mechanism of Deep Hole Gun Drilling of 15-5 PH Stainless Steel[J]. Journal of South China University of Technology (Natural Science Edition), 2020, 48(3): 91-99,107.

15-5PH 不锈钢深孔枪钻加工切屑成形的机理分析

Study on Chip Formation Mechanism of Deep Hole Gun Drilling of 15-5 PH Stainless Steel

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