Pressbrake Bending in the Punch-Sheet Contact Region—Part 1: Modeling Nonuniformities

[+] Author and Article Information
F. Pourboghrat, K. A. Stelson

Productivity Center, Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455

J. Eng. Ind 110(2), 124-130 (May 01, 1988) (7 pages) doi:10.1115/1.3187860 History: Received October 30, 1987; Online July 30, 2009


A simple model of pressbrake bending in the punch-sheet contact region is presented. The pressure and shear stress at the punch-sheet interface cause the stress distribution in the sheet to change as a function of angle. In Part 1 of this paper, a model to predict nonuniformities as a function of the geometry and the frictional conditions is presented. In Part 2, the model will be used to predict the formation of a gap between the sheet and the punch. Elastic and rigid-plastic material models of the sheet are considered, and are shown to produce remarkably similar results.

Copyright © 1988 by ASME
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