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RESEARCH PAPERS

Measurement and Control of a Straightening Process for Seamless Pipes

[+] Author and Article Information
T. Katoh

Electronics Research Center, NKK Corporation, Kawasaki, 210 Japan

E. Urata

Department of Mechanical Engineering, Kanagawa University, Yokohama, 221 Japan

J. Eng. Ind 115(3), 347-351 (Aug 01, 1993) (5 pages) doi:10.1115/1.2901671 History: Received July 01, 1990; Revised September 01, 1992; Online April 08, 2008

Abstract

This paper deals with an automatic curing process for out-of-straightness of terminal ends of seamless pipes. The developed curing process is composed of a measuring stage and a controlling stage. In the measuring stage, the out-of-straightness pattern of each pipe is measured automatically, then reference pressure points and press strokes are determined to minimize the sum of squares of deflection angles. In the controlling stage, elastic springback of the pipe is predicted by an observer using the calculated press stroke, on-line measured values of reactive force, and deflection of the pipe. Through a series of experiments, the validity of the proposed process was verified.

Copyright © 1993 by The American Society of Mechanical Engineers
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