There are several other operations associated with sheet metal presswork and these include:
Blanking ~ cutting out the original shape from a flat sheet (similar to using pastry cutters)
Piercing ~ punching out small holes
Trimming ~ removing the surplus material after pressing

Deep Drawing

This process is illustrated below and is the basis for the production of most three-dimensionally curved metal pressings. The depth which can be drawn in one go is generally around 60% of the outside diameter although greater depths are possible by redrawing the metal after annealing.


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