Nonlinear optimization-based design of ram velocity profiles for isothermal forging

Author

Berg, Jordan M. ; Adams, Richard J. ; Malas, James C. ; Banda, Siva S.

Author_Institution

USAF Wright Lab., Flight Dynamics Directorate, Wright Patterson AFB, OH, USA

Volume

3

Issue

3

fYear

1995

fDate

9/1/1995 12:00:00 AM

Firstpage

269

Lastpage

278

Abstract

The development of good material models, accurate nonlinear finite element codes, and computer-controlled presses make practical the application of control techniques to metal forging. This paper considers the open-loop problem of selecting a nominal ram velocity profile to produce a desired microstructure, given a specified die and preform geometry and forging temperature. Two approaches for doing so are applied to a simple, but representative problem. The first is based on classical numerical optimization techniques. The second is based on inverse neural networks and offers potential savings in critical computations. Simulation studies for the two methods show good results

Keywords

CAD/CAM; forging; industrial control; manufacturing processes; neural nets; nonlinear programming; accurate nonlinear finite element codes; computer-controlled presses; die geometry; forging temperature; isothermal forging; material models; metal forging; microstructure; nonlinear optimization-based design; numerical optimization techniques; preform geometry; ram velocity profiles; Application software; Design optimization; Finite element methods; Geometry; Inorganic materials; Microstructure; Open loop systems; Preforms; Presses; Temperature;

fLanguage

English

Journal_Title

Control Systems Technology, IEEE Transactions on

Publisher

ieee

ISSN

1063-6536

Type

jour

DOI

10.1109/87.406974

Filename

406974