I want to put 2 four and half inch radius bends in a piece of sheet
metal that will
be roughly 4 feet wide by 4.5 feet long.
Can metal shops do this sort of thing routinely?
I'm thinking of home brewing a machine using a pipe of the correct
a thick flat piece the rotates the sheet metal over the pipe mold.
I know our adira cnc press brake can do a series of small bends to approximate
radius. I'm sure a skilled worker can do the same with a non cnc brake.
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller
This will depend somewhat upon the thickness of the sheet metal. A
good fab shop can probably bend up to 1/2" thick or so, but a shop that
does heating and A/C duct work might have trouble with even 16 gage
(about 1/16" thick).
Sheet metal has "spring back". So, if you are going to try to do it
yourself, you will need a smaller diameter form than the 4 1/2" radius
you need on the finished product. Just how much smaller depends on a
number of factors. ---Takes experience.
Since you are doing only one of these pieces, I'd suggest finding a
shop to do it for you. Look up "welding" or "fabricating" in the yellow
pages. Tell them what you want to do, including the thickness of the
stock and the accuracy to which it has to be done.