Optimization of cold heading preform dies using FEM analysis and a multi-criteria Taguchi approach

Optimization of cold heading preform dies using FEM analysis and a multi-criteria Taguchi approach

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In this paper, a three stage cold heading process of a bolt is modeled using finite element analysis and its die geometries are optimized using a multi-criteria Taguchi approach. The Cockroft and Latham criterion is proposed for assessing likelihood of external cracks and several criteria are investigated and compared to determine the potential for shear band formation. Preform die geometries are then optimized based on the minimization of the likelihood of external cracking and die load.

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Description

In this paper, a three stage cold heading process of a bolt is modeled using finite element analysis and its die geometries are optimized using a multi-criteria Taguchi approach. The Cockroft and Latham criterion is proposed for assessing likelihood of external cracks and several criteria are investigated and compared to determine the potential for shear band formation. Preform die geometries are then optimized based on the minimization of the likelihood of external cracking and die load.

Additional information

Author(s)

C. El-Lahham, A.S. Milani, and J.A. Nemes, McGill University, and N. Nickoletopoulos and M. Hone, Ivaco Rolling Mills, Canada
Publication/Event/Pages

Paper presented at WAI 74th Annual Convention, Cleveland, OH USA. Published in WJI, May 2005.
Year

2004

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