grs-pms(at)comcast.net
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 Posted: Thu Oct 26, 2006 6:00 pm Post subject: Bending small brackets, etc |
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I bend clips,brackets and short lengths of angle over a piece of 1/2" aluminum plate. The edge of the plate is filed to the appropriate radius and undercut to a 100 degree angle. I mark the bend line on the workpiece, then hold the workpiece in place on the plate using a couple of pieces of masking tape. The bend line is in line with the edge of the radius on the plate. Then I clamp it in the vise with a piece of 3/4 inch plywood backing up the workpiece. For longer pieces I use an extra clamp or two to keep everything snug. To form the bend, two or three passes with a rubber mallet does the job.
Pieces longer than a foot or so sometimes end up a bit curved, because the sheet tends to creep a little against the plate as it is being formed. Folding-type brakes sometimes have this same problem. Making the bend on a wider piece of stock, then trimming the flange to dimension cures this. I have made angles, zees and c-sections this way, in thicknesses up to .032, with good results.
It's crude but cheap, and it doesn't take up any shop space.
George
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