Probably the preferred method for cutting intricate or thick aluminum the water jet focus a very thin stream.
How to cut aluminum sheet metal.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.
Punch presses use shaped tools to knock out geometry in sheet metal.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
Industrial cutting water jet.
Then create a pilot hole within the penciled circle.
Bench mounted tools such as shears or band saws cut aluminum sheet relatively slowly and with varying amounts of accuracy.
Modern lasers will be effective.
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.
Larger presses can be loaded with.
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.