Sheet Metal Development Length Calculation

We are going to review three bending scenarios with three different bending angles.

Sheet metal development length calculation.

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. Length of the flat blank in preparation for bending. For example if the unfold length before bending is 90 mm and if the length of a outside dimension after bending is 31 08 mm and b is 61 08 mm the bend allowance is 31 08 61 08 90 2 16 mm. K factor in sheet metal bending is a constant that is used to calculate sheet metal flat length.

You can use this sheet metal flat pattern calculator to calculate this increase in length. They are to be used solely for calculation. T the thickness of the sheet or plate 2 000 2 000 i0 125 developing the flat blank length for the above drawn part. The formula for this is sb 43r 1 372t r the radius on the inside curve of the bend.

Sheet metal development calculator is a really simple tool for calculation of development of a sheet metal part. Therefore using k factor there is no need to calculate sheet metal flat length manually. Calculations on this page are valid for an internal radius up to 1 mm and a sheet thickness up to 3 mm. You can calculate sheet metals more easily with calculation of the sheet metals you use in project.

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. Punch edge radius in. With material selection you can detail sheet metal.

Ultimate tensile strength psi. Consider a sheet with a 20 mm thickness and a length of 300 mm as shown in figure 1. As a result overall sheet length increases. Whereas the outer surface is stretched.

Die edge radius in. You can easily calculate by entering sheet metal dimensions without any restrictions. Please note the formulae on this page do not indicate whether a bend is possible. For example if the value of k factor for given material thickness and bending machines is known.

Transition patterns available flat pattern segments lobsterback bend elbow ellipsoidal dome head tee offset tee square and rectangle to round frustum cone. When sheet metal is bend the inside bending surface is compressed. Calculate the setback and then subtract it from the sum of two outside dimensions as. To find α calculate the difference between the unfold length before machining and the outside dimension after machining a b.

After the calculation you can see total weight in the calculations section.