Developed Length Of Bent Sheet Metal

Bend angle b the inside angle between the two legs or flanges of a bend.

Developed length of bent sheet metal.

Punch edge radius in. Geometry of tooling imposes a minimum bend dimension. Dimensions of the two legs of the bent part. These tests include bending some samples and then do some measurements and calculations.

Cells on the right will output the desired values. Whereas the outer surface is stretched. You can use this sheet metal flat pattern calculator to calculate this increase in length. Bend allowance ba the amount of added to the sum of the two leg lengths to obtain the flat pattern length.

If you have a sheet metal bending product as shown in above picture with two legs of length x and y and you unbend it you will see that total length of the unbend sheet will not x y rather the length will be x y ba. 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. Bend allowance ba π 180 r k t a. Material thickness mt the gauge of the material in decimal form.

The diagram shows one such mechanism. For example when sheet metal of length l is bend. Die edge radius in. The formula for this is sb 43r 1 372t r the radius on the inside curve of the bend.

Bending allowance is the input for calculating developed sheet metal size. When sheet metal is bend the inside bending surface is compressed. We are going to review three bending scenarios with three different bending angles. T the thickness of the sheet or plate 2 000 2 000 i0 125 developing the flat blank length for the above drawn part.

Bend deduction bd the amount removed from the sum of the two flange lengths to obtain a flat pattern. Ultimate tensile strength psi. Refer to the chart for values for folder as well as various press brake tooling combinations. Sheet metal flat length can be calculated in the following three simple steps.

Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend. Consider a sheet with a 20 mm thickness and a length of 300 mm as shown in figure 1. See the snap below. Calculate the value bend allowance for required sheet metal bend by using below formula.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. 60 90 and 120 and we will calculate k factor bend allowance and bend deduction for them.