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bending sheet metal

Post in 'DIY and General non-hearth advice' started by kenny chaos, Oct 27, 2008.

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  1. kenny chaos

    kenny chaos Minister of Fire

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    1/8"x48"x48" needs to be bent into a "V" shape for trough around 6-way splitter. The bottom point of the "V" will actually be 8" across and the sides need to come up at 45 degrees. There is a guy around the corner with a giant break but he's very seldom in his shop and doesn't like visitors at the house. With a couple pointers, it seems like it would be easy enough to do.
    Thanks-

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  2. webbie

    webbie Seasoned Moderator Staff Member

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    Not true - 1/8" is quite thick. You need a professional brake to bend this correctly.

    that is approx 11 gauge metal - most regular (hand) brakes can only bend down to 16 ga or so.

    I think you need his (or someone else's) help.
  3. kenny chaos

    kenny chaos Minister of Fire

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    hmmmm. I thought I could just bolt a 2x8 down the center of it and run a torch along one side at a time till it softened enough to bend my angle?
  4. webbie

    webbie Seasoned Moderator Staff Member

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    I guess it is possible - but the material may thin out, etc.
    A brake puts the weight right where you need it. 1/8" is amazingly strong. I have used thinner sheets than that to move boilers around on (200+ lbs) and they didn't bend much.
  5. JustWood

    JustWood Minister of Fire

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    48" is a long run to heat at one time and keep the entire length hot all at once. Might work if you had 3 torches going all at once.
    Some structural steel distributors have breaks and shears. You might want to check around.Maybe even the place you bought your piece.
  6. kenny chaos

    kenny chaos Minister of Fire

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    That's the cool part. I didn't have to buy it. It was a "reflective" shield behind the old stove which was replaced at your guys's insistance! Did I remember to thank you for that?

    I do appreciate the replys-
  7. WES999

    WES999 Minister of Fire

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    One way to do it if you can not find someone with a break is to drill a bunch of holes along the bend line, make the bend and then weld them up, a little hoakey but it works.
  8. Dune

    Dune Minister of Fire

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    If you are going to bother welding, cut the sheet into three sections, position them as you like, then weld them together. Personaly, I would bring it to a sheetmetal shop. Craig is right, 11 ga. by 48 inches is a difficult bend by hand. As far as using a 2x, when the metal is hot enough to bend, the wood would be incinerated. If however you MUST bend it by hand, scribe a line at each bend, chase the lines with a large, sharp cold chisel and a big hammer. Clamp the work to a solid metal table, with the chisel scored lines down, and a large section of chanel iron or angle iron on top, and then beat like heck, here heat will help immencely, yet you will be amazed at the effort required.
  9. madrone

    madrone Minister of Fire

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    At 1/8", I'd be inclined to cut and weld if I had that option but not a break. Heating and bending is more work, and usually less accurate, even when scored with a chisel as described above.
  10. Dune

    Dune Minister of Fire

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    Agreed
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