How Much Bend Do You Need For Sheet Metal

Understanding the bend allowance and consequently the bend deduction of a part is a crucial first step to understanding how sheet metal parts are fabricated.

How much bend do you need for sheet metal.

The hardness of the metal being used. 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. My workpiece s bending line is 3 m so the overall needed force is 3 22 66 tonnes. In our example below a part with flange lengths of 2 and 3 with an inside radius of 250 at 90 will have leg lengths of 1 625 and 2 625 respectively.

In order to develop the flat pattern we add 457 to 1 625 and 2 625 to arrive at 4 707. Step 2 choose a straightedge. The lowest common bench capacity is around 100 tonnes. This way you won t need to be concerned about making an unwanted mark you won t be able to clean off your sheet metal.

Cells on the right will output the desired values. This will help you determine whether or not specialized equipment is required. As this happens you gain a small amount of total length in your part. The bend deduction sometimes called the bend compensation describes how much the outside of the sheet has been stretched.

With this free online tool we quickly get the sheet metal bend deduction and therefore the sheet metal blank initial flat length from the finished part measurements. The total strength of bending of a sheet is directly proportional to the length of bending. The required die width is 12 mm and tonnage per meter is 22. As an example if you want to bend 24 gauge sheet metal at a 90 angle the calculation would be.

All of these metal depend on the thickness of the material. Therefore even a simple bench with enough room to bend 3 m pieces will do the job. The thickness of the sheet metal. When we calculate the bend allowance we find that it equals 457.

Once you have calculated your bend allowance you will need to mark your lines clamp your sheet metal and begin the bending process. The strength of the table is the force required to bend sheet metal up to 1 m in length. 0 017453 x 90 x 0 020 0 33 x 0 024 0 0438558984 inch bend allowance keep in mind that some metals are more brittle than others. Aluminum is can be bent at 1 ton stainless at 50 ton mild steel at 100 tons carbon steel can be bent at 150 tons.

Use a dry erase marker to make the mark. You only have to insert interior angle flange lengths k factor inside radius and material thickness. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.