Sheet Metal Development Length Formula

Material thickness mt the gauge of the material in decimal form.

Sheet metal development length formula.

You only have to insert interior angle flange lengths k factor inside radius and material thickness. T the thickness of the sheet or plate 2 000 2 000 i0 125 developing the flat blank length for the above drawn part. Sheet metal development calculator is a really simple tool for calculation of development of a sheet metal part. Where ba is bending allowance.

Cells on the right will output the desired values. By replacing initial length leg length 1 and 2 in the above equation we can calculate the bend allowance as follows. Bend deduction is equal to the difference between the total sheet metal length after bending and flat length. We know that ba is the length of the arc on the neutral axis.

Bend allowance ba the amount of added to the sum of the two leg lengths to obtain the flat pattern length. Ultimate tensile strength psi. Where r is the radius of the arc on the neutral axis. Transition patterns available flat pattern segments lobsterback bend elbow ellipsoidal dome head tee offset tee square and rectangle to round frustum cone.

Die edge radius in. Calculate the setback and then subtract it from the sum of two outside dimensions as follows. 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. 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.

The length of the median plane is the unfold length which can be obtained by the following formula. Bend angle b the inside angle between the two legs or flanges of a bend. Length of the flat blank in preparation for bending. In this formula the initial length is 300 mm.

Bend deduction bd the amount removed from the sum of the two flange lengths to obtain a flat pattern. Punch edge radius in. The formula for this is sb 43r 1 372t r the radius on the inside curve of the bend.