2. Adapting sheet metal to the stamping process
We propose to examine in turn the influence of each of these mechanical characteristics on forming, identifying as precisely as possible the type of forming for which they are favorable or detrimental.
2.1 Influence of the anisotropy coefficient
As we have seen, in paragraph 3.4 of article , the anisotropy coefficient r reflects the metal's tendency, during a tensile test, to deform in width rather than thickness. Note that this behavior is true in both directions: if r is high, the metal also thickens, but in compression. We also saw, in paragraph 1.1 of the article that the deformation mode known as swaging requires a reduction in (circumferential) width under tension for the metal to penetrate the die.
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Adapting sheet metal to the stamping process
Metallurgical aspects
Bibliography
References
Standardization
French Standards Association (AFNOR)
- Steel products – Deformability and machinability tests – Stamping tests with clamped blanks. - NF A03-652 - 12-84
- Steel products – Method for determining the plastic anisotropy coefficient r of steel sheets. - A03-658 - 11-01
- Steel products – Method for determining the strain-hardening coefficient n of steel sheets. - A03-659 - 11-01
- Steel products – Determining...
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