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Affiliation of Author(s):机电工程学院
Teaching and Research Group:机电工程学院
Journal:论文集
Funded by:国家自然科学基金项目
Key Words:Frictional temperature rise; Rough contact surface, Statistic
Abstract: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 Gauss’s 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.
First Author:sunxianping
Indexed by:Essay collection
Page Number:2
Number of Words:1
Translation or Not:no
Date of Publication:2010-08-24