Galling and Friction in Ironing of Thin Aluminum Cups

[+] Author and Article Information
Masami Saito

Department of Mechanical Engineering, Suzuka College of Technology, Shiroko-cho, Suzuka, 510-02 Japan

Hiroyuki Saiki

Department of Mechanical Engineering, Kumamoto University, Kurokami, Kumamoto, 860 Japan

Nozomu Kawai

Department of Mechanical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464 Japan

J. Eng. Ind 111(1), 64-69 (Feb 01, 1989) (6 pages) doi:10.1115/1.3188733 History: Received January 29, 1987; Online July 30, 2009


An experiment of ironing of aluminum cups has been carried out under various lubrication conditions. The surface appearances of the ironed cups can be classified into five main groups according to the extent of the damage caused by galling. The extent has a good positive correlation with the frictional coefficient (μd ) at the die surface for every lubricant used on the punch side. The cup surface gradually deteriorates as the punch side friction (μp ) increases, due to the increase in normal pressure over the die-metal interface, and vice versa. Thus it is possible to evaluate the surface appearances by means of the two frictional coefficients μd and μp . The frictional condition for a burnished smooth surface has been obtained for pure aluminum cups ironed by a tool-steel die.

Copyright © 1989 by ASME
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