文献类型：期刊文献

英文题名：Reinforcement effect of cutting process on machined surface quality and performance of aviation aluminum alloy 7075 based on Oxley-Welsh theory

作者：Jiang, Hongwan Ren, Zhongwei Zou, Zhongfei Yuan, Sen Yi, Yanliang

第一作者：蒋宏婉;Jiang, Hongwan

通信作者：Jiang, HW[1];Ren, ZW[1]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China;[2]Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China;[3]Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China

第一机构：贵州理工学院机械工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China.|贵州理工学院机械工程学院;贵州理工学院;

年份：2023

卷号：95

起止页码：38-52

外文期刊名：JOURNAL OF MANUFACTURING PROCESSES

收录：;EI(收录号：20231513877136);Scopus(收录号：2-s2.0-85152110884);WOS:【SCI-EXPANDED(收录号:WOS:001055742100001)】；

基金：This work is financially supported by National Natural Science Foundation of China (Grant No. 52265055, 52005118) , Science and Technology Plan Project of Guizhou Province (Grant No. QKHJC-ZK [2022] ZD026) , Young Scientific Technical Talents Development Fund of Guizhou Province (Grant No. QJHKYC [2022] 359) , and High-level Talents Research Initiation Fund of Guizhou Institute of Technology (Grant No. 2019066) .

语种：英文

外文关键词：Oxley-Welsh theory; Strain-hardening effect; Shear flow stress; Hydrostatic stress; Quality & performance

摘要：Aiming at the difficult problem of regulating the mechanical properties of the machined surface in the dry cutting of aviation aluminum alloy 7075, and the deviation of the solution caused by the idealized assumption of stressstrain in the shear zone in the previous cutting models, the effect of cutting parameters on the average width of the shear zone and stress-strain behavior of aviation aluminum alloy 7075-T651 in the dry turning process, and the effect of strain-hardening behavior on the cutting model were studied based on the Oxley-Welsh theory. In addition, relationship models between shear flow stress and hydrostatic stress in cutting zone, hydrostatic-shear difference of material unit, microhardness of machined surface, as well as surface roughness were established, which reasonably explains the size effect and strain-hardening effect in the shear zone of workpiece material during dry turning of 7075-T651 aluminum alloy. The results showed that the slope K of the relationship model between shear flow stress and hydrostatic stress is the result of the combined effect of the size effect and the strain-hardening effect in the shear zone of workpiece material. When the 7075-T651 aluminum alloy is produced under the cutting conditions of cutting velocity v(c) = 240 m/min, feed rate f = 0.05 mm/r, and cutting depth a(p) = 0.15 mm, the machined workpiece had the best uniform plastic deformation, relatively highest surface hardness, up to 174.1 HV, relatively best surface quality, with roughness up to 0.78 mu m, and relatively strongest load-bearing capacity in the service process.