Effects of heat fraction on chip formation based on hard turning thermo-mechanical model

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作者：
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China [1 ]
不详 [2 ]
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来源：
Dongbei Daxue Xuebao | 2008年 / SUPPL. 2卷 / 13-16期
关键词：
Hard turning - Heat fraction - Machined materials - Serrated chip - Serrated chip formation - Softening phenomenon - Thermo-mechanical coupled - Thermomechanical model;
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摘要：
The thermo-mechanical coupled cutting model is made with Abaqus/Explicit software focused on the case of hard turning of 40CrNi2M. In order to stop heat dissipation affecting the model, for the machined workpiece, a zero conductivity value of the machined material is adopted. With the cutting model, a parametric study is proposed of the fraction of frictional work converted to heat at the tool/workpiece interface. This study proves that serrated chip formation is the result of a softening phenomenon, and the heat fraction influences the tool damage directly.
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