Punch presses use shaped tools to knock out geometry in sheet metal.
How to cut aluminum sheet metal.
This weakens the aluminium and creates a fracture line.
Larger presses can be loaded with.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.
Probably the preferred method for cutting intricate or thick aluminum the water jet focus a very thin stream.
Step 5 optional if your project requires cutting a hole in the center of sheet metal draw it on the metal as you would any other cut line.
Modern lasers will be effective.
Industrial cutting water jet.
Sheet aluminium can be cut without the need for a guillotine or tin snips which tend to deform the metal.
To cut the sheets of metal rathe.
An air powered sheet metal nibbler or a nibbler head attached to a power drill can cut through galvanized corrugated aluminum sheet as well as flat sheet up to 16 gauge.