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Alain COL: Consulting engineer, Consultac, thin sheet metal forming expert - Former Forming Manager at Sollac
INTRODUCTION
To better adapt the choice of sheet metal to a given type of stamping, it is important to take into account the influence of mechanical characteristics on forming. The first part of this article describes the forces involved in forming, followed by a detailed analysis of the role of mechanical characteristics such as anisotropy coefficient, drawing coefficient, yield strength and tensile strength. Metallurgical factors such as crystallography, metallographic structure, grain size, surface area and material homogeneity also influence formability and will also be examined.
The complete study of the subject includes the articles :
— - Sheet metal stamping. Importance of deformation modes;
— M 3 181 - Sheet metal stamping. Mechanical aspect (this article) ;
— - Sheet metal stamping.
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Sheet metal stamping
Stamping forces
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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