Optimization of Spot-Welds on Patchwork Blank for Hot Forming Process

Abstract:

Patchwork blank is usually comprised of two different thickness of HSS sheet metals spot welded on top each other. Designed to provide an increased stiffness, it is widely used in many structural formed parts. The correct number of spot-welds is important in terms of cost and safety. In this study, the effects of spot-weld locations on an automotive part called B-Pillar with patchwork blank design was investigated by numerical hot forming simulation. The spot weld was modeled as a rigid link between parent blank and additional blank. Throughout the forming simulation, maximum stress and formability of the part were monitored. The same procedure was repeated for different spot-weld number and location. An optimum number of the spot-weld was then determined by the onset of wrinkle disappearance. Performance of the optimized spot-weld part was validated by actual part.

• Periodical: Applied Mechanics and Materials (Volume 606)
• Pages: 177-180
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.606.177
• Online since: August 2014
• Authors: M. A. Ahmad, A. Zakaria*
• Keywords: Forming Simulation, Hot Forming, Patchwork Blank

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