Die Science: Piercing, cutting aluminum without slivers

Slivers are the result of the aluminum interfacing with the cutting sections or punches. To reduce the production of slivers the severity of friction at the point where the two surfaces interface must be reduced. The general rule for cutting materials is the softer the metal the smaller the cutting clearance.

Shearing and flanging conditions. Fig. 12. Surface of sheared edge

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PDF) Notch Shear Cutting of Aluminum Alloys

Die Science: Piercing, cutting aluminum without slivers

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Shearing process: blanking and piercing [1]