Optimum pre-form dies in two-stage forging

• Type: Article in International Scientific Journal
• Date: 2006

Authors

poursina, m (Author) Other; parvizian, j (Author) Other; antonio, cac (Author) FEUP

Journal

Title: Journal of Materials Processing Technology

Vol. 174 No. 1

Pages: 325-333

ISSN: 0924-0136

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 19 Citations

Scopus - 22 Citations

Other information

Authenticus ID: P-004-KQF

DOI: 10.1016/j.jmatprotec.2006.01.015

Abstract (EN): Since 1980s the problem of manufacturing defect-free parts has been tackled with simulation tools. In this paper, a numerical method for shape optimisation of pre-form dies in a two-stage hot forging is presented. The object of optimisation is to eliminate work-piece defects that may arise during the forging process. A two dimensional finite element code has been developed for the simulation of the mechanical process and prediction of the defects. The material is incompressible and it follows the Norton-Hoff law. To deal with contact constraint. the velocity-projection algorithm is used. The optimisation method is based on a genetic algorithm supported by an elitist strategy. The developed scheme is used to design optimal pre-form dies for two axi-symmetric examples. The objective function is associated with the quality of the final product. Comparing the obtained optimal results with other articles justifies the proposed optimisation method.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9