文献类型：期刊文献

英文题名：Construction of a predictive model for residual stresses in micro-milling of 7075 aluminum alloy

作者：Zhang, Ping[1,2];Zhang, Songting[1];Wang, Shunxiang[1];Sun, Yajie[1];Yue, Xiujie[2,3]

机构：[1]Guangdong Ocean Univ, Coll Mech & Power Engn, Zhanjiang, Peoples R China;[2]Qingdao Huanghai Univ, Coll Intelligent Mfg, Qingdao 266520, Peoples R China;[3]Qingdao Univ Technol, Coll Intelligent Mfg, Qingdao 266520, Peoples R China

年份：2024

卷号：131

期号：7-8

起止页码：3871

外文期刊名：INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:001170896900002)、、EI(收录号：20240815611882)、Scopus(收录号：2-s2.0-85185499067)、WOS

基金：No Statement Available

语种：英文

外文关键词：Micro-cutting; Residual stress; Prediction model; Cutting parameters; Machining mechanism

外文摘要：This manuscript delineates a predictive model for evaluation of residual stress phenomena in micro-machining operations, predicated upon the symbiotic dynamics of strain, strain rate, and thermal conditions. The objective is to scrutinize the ramifications of variable parameters such as machining velocity, axial depth of cut, and cutting tool's rake angle on the resultant machining forces and induced residual stresses. By analyzing the interplay between the shear forces, frictional stresses, and the material deformation forces during micro-machining, alongside the correlation between shear velocity and material displacement, as well as thermal contributions in both primary and secondary deformation regions involving the substrate, removed material, and the cutting implement, the residual stresses are deduced employing the Johnson-Cook material behavior model, manifesting predominantly as compressive residual stresses within the work material. The veracity of the analytical model for residual stress is corroborated with the maximum relative discrepancies for principal cutting force and residual stress at 16.8% and 6.53%, respectively, both falling under the 15% threshold, thus affirming the model's precision. Empirical findings underscore the axial depth of cut as the most influential parameter on machining forces, with theoretical escalations of 183.84% and 145.67% in the orthogonal X and Y directions accordingly, as the depth of cut augments from 10 to 25 mu m. Conversely, the machining velocity predominantly affects the thermal profile and residual stress levels; a surge in machining velocity from 400 to 800 mm/min correlates with a theoretical amplification in thermal generation by 227.52%, while concurrently registering a decrement in residual stress magnitude by 7.08%.