Stamping is a metalworking process by which sheet metal strips are punched using a press tool which is loaded on a machine press or stamping press to form the sheet into a desired shape. This could be a single stage opearation where every stroke of the press produce the desired form on the sheet metal part. Or the stamping can be done in a series of stages in a press tool to perform various stamping operations to get the required form on component.

The most common stamping operations are, Piercing
Blanking
Bending
Forming
Coining
Deep Drawing
Embossing and
Extrusion.

Some useful information on stamping can be found at Metal Stamping Dies

Metal forming | Stanzen (Technik)