Analytical model of temperature field in workpiece machined surface layer in orthogonal cutting

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• 作者：Kun Huang ^{khuang123456@163.com" class="auth_mail" title="E-mail the corresponding author} ; Wenyu Yang ; ^{mewyang@hust.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Temperature field ; Machined surface ; Analytical model ; Orthogonal cutting
• 刊名：Journal of Materials Processing Technology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：229
• 期：Complete
• 页码：375-389
• 全文大小：6250 K

文摘

The cutting temperature has significant effects on the machined surface integrity, including the residual stress formation, metallurgical alteration and microstructural change of the workpiece. In this study, based on an analysis of the isothermal patterns in the workpiece for orthogonal cutting derived by Komanduri and Hou’s thermal model, the authors noted that the temperature variations presented by the model do not indicate the cooling process of the workpiece and therefore the results are not consistent with the actual cutting process. Thus the authors improved the thermal model by introducing the heating time at the point of interest on the workpiece. The geometries of the computed isothermal patterns show that the cooling process of the workpiece has been successfully considered in the improved model. Moreover, the temperature penetration depth derived from the computed isotherms was studied under various cutting conditions. The computed results show that temperature exponentially decreases as the depth increases, which is consistent with the results obtained using the finite element model software AdvantEdge. In addition, the temperature penetration depths were compared with those obtained from physical vapor deposition film experiment, consistency was observed with the measured values. The improved thermal model will be of great significance for the study of the residual stress and heat affected zone on the machined surface.