Blank Development and Metal Flow Analysis for Multi-Stage Drawing of Box Shaped Stampings

Paper #:
  • 910516

Published:
  • 1991-02-01
Citation:
Assempoor, A. and Karima, M., "Blank Development and Metal Flow Analysis for Multi-Stage Drawing of Box Shaped Stampings," SAE Technical Paper 910516, 1991, https://doi.org/10.4271/910516.
Pages:
20
Abstract:
Blank development is the basis for calculating the material cost and hence the product cost, at the quoting stage. Understanding the metal flow under the binder is a critical activity during the tooling design stages, as well as during phototyping. The paper describes a computer aided blank development and metal flow analysis system, that will assist in performing the functions described above, before the tools are built, for box shaped parts drawn in multi-stage forming operations with a flat punch face, and a flat binder.Development of the minimum blank shape, using the SLF technique for shrink flanged components is not new. The paper addresses the extension of the approach to: i. multi-stage forming operations and, ii. the incorporation of the effect of thickness changes on the blank shape. Applications are given in the paper using the computer program BLANKDEV.
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