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.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
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.
To cut the sheets of metal rathe.
Probably the preferred method for cutting intricate or thick aluminum the water jet focus a very thin stream.
Industrial cutting water jet.
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.
Larger presses can be loaded with.
Bench mounted tools such as shears or band saws cut aluminum sheet relatively slowly and with varying amounts of accuracy.