Determine Natural Bend Of Sheet Aluminum

From there we can calculate the k factor and the bend deduction.

Determine natural bend of sheet aluminum.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Bend allowance calculator the bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal. A cutout or the edge of your flange to your bend.

Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees. If you re bending 0 020 thick material use a 0 020 radius. Determine the thickness of your sheet. This measurement will be necessary for calculating your bend allowance.

Also know that for the best results and fewer cracks on the outside of the bend the bend line should go across or diagonal to the material grain when and where possible. After bending the sheet we need to do some measurements as shown in figure 2. 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. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

If you have any questions or want to discuss your design contact us. You will use the protractor to gauge the brake as you bend the metal little by little. 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 bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

The minimum bend radius data shown in these charts is measured to the inside of the bend. Choose a bend radius that matches your minimum bend. We will start by calculating the bend allowance. General advice on aluminum.

90 degrees bend angle. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. When bending aluminum know that the smaller your inside bend radius the larger the chance that cracking will occur in the part. You can use a tape measure or ruler to measure the thickness of your sheet metal.

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend. Cells on the right will output the desired values. Determine your minimum bend by measuring the distance from your closest feature i e.

Cut the section of metal out or otherwise prepare the metal to be bent by removing any burrs or sharp edges.