Title: Evaluation for forming at T-shaped forming points during press forming

Authors: T. Tamada, K. Tamura, T. Ogowa

Addresses: Mazda Motor Corporation, 3-1 Shinchi, Fuchuo-cho, Aki-gun, Hiroshima-ken 730-91, Japan. ' Mazda Motor Corporation, 3-1 Shinchi, Fuchuo-cho, Aki-gun, Hiroshima-ken 730-91, Japan. ' Mazda Motor Corporation, 3-1 Shinchi, Fuchuo-cho, Aki-gun, Hiroshima-ken 730-91, Japan

Abstract: One of the major problems in press forming at Mazda is the deformation of T-shaped joints, specifically the upper part of the central pillar. Analysis of the causes of the deformation and development of a method estimating its effect were conducted so that proper precautions might be taken at the die-design stage. The deformation as analysed in terms of movement and elongation (stress) of the sheet metal in order to express it quantitatively in mathematical formula. These parameters, which are the causes of the deformation, were made computable. This paper deals with the development and application of the method of estimating the deformation.

Keywords: central pillar; deformation estimation; press forming; sheet metal forming; T-shaped joints; Mazda; automobile industry; Japan; die design; stress; automotive manufacturing.

DOI: 10.1504/IJMPT.1991.036657

International Journal of Materials and Product Technology, 1991 Vol.6 No.3, pp.269 - 281

Published online: 05 Nov 2010 *

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