Numerical investigation of friction coefficient in coining processes of the same part in different grain sizes

Keran, Zdenka and Math, Miljenko and Piljek, Petar (2011) Numerical investigation of friction coefficient in coining processes of the same part in different grain sizes. = Numerical investigation of friction coefficient in coining processes of the same part in different grain sizes. In: 13th International Scientific Conference on Production Engineering, 16-18.06.2011., Biograd, Hrvatska.

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Official URL: https://bib.irb.hr/prikazi-rad?&rad=517609

Abstract

The study concerns the analysis of significant contact friction changes by changing the size of crystal grains in the processes of free axisymmetric workpieces upsetting, initial height of 2 mm. The friction changes result with significant changes in forming force. This phenomenon usually characterizes microforming processes. Using hard experimental data in the creation of numerical FE (finite element) model, a dependence of the changes of contact friction in correlation to the change of the workpiece crystal grain size for three different grain sizes: 39, 47 and 76 μm is presented. It is shown that the friction factor is increased by reducing the size of crystal grains. Physical interpretation of the results is given by theory of Bowden and Tabor.

Item Type: Conference or Workshop Item (Other)
Keywords (Croatian): coining process, numerical simulation, friction coefficient
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 1200 Department of Technology > 1220 Chair of Metal Forming
Date Deposited: 22 Sep 2016 11:09
Last Modified: 22 Sep 2016 11:09
URI: http://repozitorij.fsb.hr/id/eprint/6903

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