7075-T6铝合金干式切削表面完整性研究  

Study on Surface Integrity of Dry Cutting of 7075-T6 Aluminum Alloy

作　　者：张程焱 王立新[1] 孟五洲[1] 俎晓莉 ZHANG Cheng-yan;WANG Li-xin;MENG Wu-zhou;ZU Xiao-li(School of Mechanical Engineering,Anyang Institute of Technology,Anyang Henan 455000,China)

机构地区：[1]安阳工学院机械工程学院,河南安阳455000

出　　处：《组合机床与自动化加工技术》2020年第3期148-151,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：河南省重大科技专项(171100210300);安阳市科技攻关项目;安阳工学院博士启动基金(BSJ2018003)。

摘　　要：为了避免切削液对高强铝合金耐蚀性产生影响,针对7075-T6航空铝合金在绝对干式条件下进行正交切削实验,建立了表面粗糙度、残余应力以及显微硬化的经验公式,分析了切削参数对表面完整性的影响规律。结果表明:切削三要素对表面粗糙度的影响占主导地位,且进给量是影响其大小的主要因素,其次是背吃刀量,然后是切削速度;干切削状态下,切削速度的提高导致产生较大的拉应力;进给量减小造成硬化现象严重;切削速度提高,且在较大切深情况下,最大硬化层深明显提高。In order to avoid the influence of cutting fluid on corrosion resistance of high strength aluminum alloy,the orthogonal cutting experiment of 7075-T6 aviation aluminum alloy was carried out under absolute dry condition,and the empirical formulas of surface roughness,residual stress and micro hardening were established.And the influence of cutting parameters on surface integrity is analyzed.The results show that the influence of the three factors on the surface roughness is dominant,and the feed rate is the main factor affecting its size,followed by cutting depth,and then the cutting speed.Under the condition of dry cutting,the increase of cutting speed leads to large tensile stress produced after cooling.The decreases of the feed rate resulting in serious hardening phenomenon.the cutting speed increases,and the maximum hardened layer depth increases obviously under the condition of large cutting depth.

关 键 词：高强铝合金 干式切削 表面完整性 正交试验 

分 类 号：TH162[机械工程—机械制造及自动化] TG65[金属学及工艺—金属切削加工及机床]