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TECHNICAL BRIEFS

Design of Forging Process Parameters With Deformation and Temperature Constraints

[+] Author and Article Information
R. V. Grandhi, S. S. Kumar

Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH 45435

H. Cheng

Systems Research Laboratory, Dayton, OH

J. Manuf. Sci. Eng 118(3), 441-444 (Aug 01, 1996) (4 pages) doi:10.1115/1.2831051 History: Received December 01, 1992; Revised March 01, 1995; Online January 17, 2008

Abstract

This paper presents a methodology for designing optimal process parameters for forging operations. The nonlinear rigid viscoplastic finite element (FE) method is used for deformation and thermal analyses. From the FE model a state space system is developed for representing the coupled deformation and thermal behavior of the metal forming system. Constraints are imposed on the strain rate and temperature of the deforming work-piece for obtaining the desired physical/microstructural properties in the final product. The linear quadratic regulator (LQR) theory for finite time control is used in designing the initial die temperature and optimal ram velocity schedules. The approach is demonstrated on a plane strain channel section forging under nonisothermal conditions.

Copyright © 1996 by The American Society of Mechanical Engineers
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