Analysis of statistical temperature rise for rough surface friction in extrusion forming process
The friction between rough surfaces of the tool and workpiece causes temperature rise during relative movement, which aggravates die wear. Based on the elastic contact Hertz theory and the fundamental theory of heat conduction, the temperature distribution on asperity was calculated in the paper. Under the hypothesis that asperity height distribution of rough surfaces accorded with Gausss law, the statistical values of embedded depth between contact surfaces were introduced and the statistical temperature rise distribution on asperity was analyzed. The results illustrated that the surface geometry morphology influenced the temperature rise apparently. The distributions of temperature rise in the axial and normal directions were non-uniform and the temperature rise decreased gradually from the centre of asperity. At the initial stage of friction, the temperature rise increased sharply and afterwards became stable gradually. The analysis of temperature rise distribution on the contact area of asperity provided the foundation for establishment of temperature rise model during extrusion forming process.
Extrusion Frictional temperature rise Rough contact surface Statistic
Xianping Sun Lijun Wei Yao Huang Leigang Wang
School of Mechatronic Engineering Changchun Univerisity of Technology Changchun,China School of Materials Science and Technology Jiangsu University Zhenjiang,China
国际会议
长春
英文
160-163
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）