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Default Metal forming problem


A few of the products I receive have a manufacturing defect which may cause problems in time.

The issue is tears in the metal at a point where the metal blank shape is pressed to create to upright "wings" which form the hinge part of the assembly. The assembly is a rat trap. The metal is galvanised mild steel.

This link shows a photo ... www.tomdhu.com

Any suggestions how this could be avoided? Different radius ? Lubrication? Two stage forming? Heat?

Baz
 
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