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RESEARCH PAPERS

FEM Simulation of a Friction Testing Metliod Based on Combined Forward Conical Can-Backward Straight Can Extrusion

[+] Author and Article Information
Tamotsu Nakamura

Department of Mechanical Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, 432, Japan

Niels Bay

Institute of Manufacturing Engineering, Bldg. 425, Technical University of Denmark, DK-2800 Lyngby, Denmark

Zhi-Liang Zhang

Department of Mechanical Engineering, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, 432, Japan

J. Tribol 120(4), 716-723 (Oct 01, 1998) (8 pages) doi:10.1115/1.2833770 History: Received June 10, 1997; Revised November 30, 1997; Online January 24, 2008

Abstract

A new friction testing method based on combined forward conical can-backward straight can extrusion is proposed in order to evaluate friction characteristics in severe metal forming operations. By this method the friction coefficient along the conical punch surface is determined knowing the friction coefficient along the die wall. The latter is determined by a combined forward and backward can extrusion of straight cans. Calibration curves determining the relationship between punch travel, can heights, and friction coefficient for the two tests are calculated based on a rigid-plastic FEM analysis. Experimental friction tests are carried out in a mechanical press with aluminium alloy A6061 as the workpiece material and different kinds of lubricants. They confirm that the theoretical analysis results in reasonable values for the friction coefficient.

Copyright © 1998 by The American Society of Mechanical Engineers
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