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RESEARCH PAPERS: Production Engineering Papers

An Adaptive Pressbrake Control Using an Elastic-Plastic Material Model

[+] Author and Article Information
K. A. Stelson, D. C. Gossard

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass. 02139

J. Eng. Ind 104(4), 389-393 (Nov 01, 1982) (5 pages) doi:10.1115/1.3185847 History: Received July 10, 1981; Online July 30, 2009

Abstract

An adaptive controller for a pressbrake has been designed, built, and tested. The controller measures force and displacement during the early part of the bend cycle to estimate workpiece parameters. These parameters are used in an elastic-plastic material model to predict the correct final punch position to yield the desired unloaded angle. A microcomputer is used to control a Cincinnati CB90 hydraulic pressbrake. Data acquisition and computation times are short enough to bend a minimum flank angle of 15 deg using the standard forming rate of 6.7 mm/s (16 in./min) and a 25 mm (1 in.) V-die. Errors in flank angle were less than 1.5 deg in all cases.

Copyright © 1982 by ASME
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