wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. So your best bet is to buy something like 0.5 mm and 1 mm and give it a go, going thicker if you need it to hold shape better, and thinner if it isn't bending to shape very well. Once a piece of sheet metal is creased, its well neigh impossible to take the crease completely back out of it. Next, put your wooden or metal form blocks in the vice and clamp your sheet of metal between the forms. Will heating the aluminum make it easier to bend without a break? What is the minimum thickness I need? Slowly work back and forth between your bend lines until the sheet metal is bent to the desired angle. Copyright© If your sheet metal is too thick, you may need special machinery, like a brake or a torch, to bend your sheet into the desired shape. One edge of your form will typically be rounded to the degree of your bend radius, thus helping you achieve your desired bend. submitted to our "DoItYourself.com Community Forums". Apply an equal amount of force used to create the crease in the opposite direction of the crease. The can will collapse under any kind of bending operation. I have a bending machine and am working on a door frame. Use a dry-erase marker to make the mark. This article has been viewed 264,551 times. Before attempting to make your bend, you'll need to measure and mark the place where you want to make your bend on your sheet metal. Thanks for reading. Unlike a pipe which derives its strength from the thickness of its wall, aluminum cans actually get their strength from the non-compressible liquid sealed inside them. When a value is inputted into a cell I want another ce... Sheet metal trunk sitting on attic joists. We welcome your comments and To ascertain your K-Factor, inside radius, and material thickness (expressed as a decimal), you should use an, As an example, if you want to bend 24 gauge sheet metal at a 90° angle, the calculation would be: 0.017453 x 90 x (0.020 + 0.33 x 0.024) = 0.0438558984 inch bend allowance. Having the right tools on hand will help this process go smoothly and quickly. Make sure you have correctly solved the bend allowance equation before attempting to bend sheet metal. To create this article, 16 people, some anonymous, worked to edit and improve it over time. If your sheet metal is long, ask a friend to stabilize the part hanging out from the form blocks so it doesn't affect the bend. A table edge or a shelf will sometimes give you a straightedge that will be less likely to move when you begin bending your sheet metal. Questions of a Do It Yourself nature should be To bend sheet metal in a vice, start by marking a line on the metal where you want to bend it. For example: if your desire bend is 45°, you will subtract this number from 180°, which will give you a bend angle of 135°. Then place a 2x2 inch strip across the sheet metal, so the edge is aligned with the line drawn on the sheet metal. The area near the bend deformed after bending. With both hands pushing downward on the outer 2x2, begin bending the metal sheet, applying equal downward pressure at both ends. % of people told us that this article helped them. The inside edge of the strip should be parallel with the line you made on the sheet metal. Thanks to all authors for creating a page that has been read 264,551 times. Website operating Even on malleable materials, you can end up cracking the metal at the bend, or weakening it to the point where it’ll break with minimal force. Bending with precision is not. Hello, They have always been interesting metal products made of nuts, bolts... Hello All, I'm working on 18 ga. sheet metal project where a stamped recess... Hi, I have a sheet metal panel roof and siding pole barn which has an enclo... Finishing basement- fresh air ducting and drywall questions. If you're working with a thick sheet of metal, apply heat from a blowtorch along the bend line to soften it. The chimney has a rain cover at the top made of sheet metal. With both hands pushing downward on the outer 2x2, begin bending the metal sheet, applying equal downward pressure at both ends. With a second wood clamp, clamp another 2x2 inch strip to your sheet metal. home improvement and repair website.