How those enclosure are made?

[Dimitree]

I'm wondering what is the way to manufacture an enclosure like this:



You first cut to the proper shape and size the sheet, then you fold it? And how? With a machine I guess.. or is the sheet pressed onto a hard piece of metal to get that shape?
Sorry for the dumb question 

[marcelomd]

Hi,
That is correct. Cut a sheet of metal and fold the front then the back, and finally the sides.
The machine is a brake press. It uses matching tool and die to fold specific shapes.

EDIT: Press brake, brake press, folding brake press. I've seen a few combinations.

[PRR]

For THAT job: a box and pan brake.
https://www.youtube.com/watch?v=3yl9fOPOve8
The brake-edge is a dozen sliding fingers, so you can adjust the width of the bent section (bend the sides of a bread-pan one at a time).

Cut the shape below in cardboard. Make the inside width about the size of a handy scrap of wood. Put it on the edge of the bench, like the brake in the video, and bend. Then move to foot-worthy chromed steel and a hardened-iron bending brake.



Hydraulic brakes are for bending a million. The hot-air heating ducts in my home were all bent on a large hand brake (however you don't stomp an air-duct). Hand-power brakes are readily available, as industrial, ventilation, and auto-repair tools.