An improved analytical model of cutting temperature in orthogonal cutting of Ti6Al4V
An improved analytical model of cutting temperature in orthogonal cutting of Ti6Al4V
复制标题
Ti6Al4V正交切削切削温度的改进分析模型
DOI：
10.1016/j.cja.2018.12.001
复制
发表时间：
2019-03-01
影响因子：
5.7
通讯作者：
Zhang, Dinghua
中科院分区：
文献类型：
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作者：
Shan, Chenwei;Zhang, Xu;Zhang, Dinghua
在航空航天领域，切削热对钛合金加工表面的完整性有重要影响。高切削温度可引起许多不必要的问题，如表面燃烧、加工硬化和刀具磨损。因此，有必要准确预测钛合金的切削温度。本文在Komanduri-Hou模型和Huang-Liang模型的基础上，提出了钛合金正交切削时切削温度的改进解析模型。刀具、切屑和工件各点的温度是用移动热源法计算的。在该模型中引入刀具放放角，采用剪切面热源和摩擦热源的虚镜像热源计算半无限介质中的温升。采用离散化方法确定了沿刀屑界面的热分配比。为验证目的，在车床上用利器对钛合金Ti6Al4V进行正交切削。实验结果与模型吻合较好，预测温度的相对差值在0.49% ~ 9.00%之间。该模型对Ti6Al4V正交切削的切削温度进行了预测。（三）2019中国航空航天学会由爱思唯尔有限公司制作和托管
Cutting heat has significant effects on the machined surface integrity of titanium alloys in the aerospace field. Many unwanted problems such as surface burning, work hardening, and tool wear can be induced by high cutting temperatures. Therefore, it is necessary to accurately predict the cutting temperature of titanium alloys. In this paper, an improved analytical model of the cutting temperature in orthogonal cutting of titanium alloys is proposed based on the Komanduri-Hou model and the Huang-Liang model. The temperatures at points in a cutting tool, chip, and workpiece are calculated by using the moving heat source method. The tool relief angle is introduced into the proposed model, and imaginary mirrored heat sources of the shear plane heat source and the frictional heat source are applied to calculate the temperature rise in a semi-infinite medium. The heat partition ratio along the tool-chip interface is determined by the discretization method. For validation purpose, orthogonal cutting of titanium alloy Ti6Al4V is performed on a lathe by using a sharp tool. Experimental results show to be consistent well with those of the proposed model, yielding a relative difference of predicted temperature from 0.49% to 9.00%. The model demonstrates its ability of predicting cutting temperature in orthogonal cutting of Ti6Al4V. (C) 2019 Chinese Society of Aeronautics and Astrona Lincs. Production and hosting by Elsevier Ltd.