Bending Factor In Sheet Metal

R inside bend radius.

Bending factor in sheet metal.

K factor 180 x ba π x complementary bend angle x mt ir mt 2. The optimum width of the v opening is 6 t t stands for material thickness for sheets about 3 mm thick up to about 12 t for 12 mm thick sheets. T sheet thickness. When bending a workpiece it will naturally spring back a little after the load is lifted.

It s the base value needed to calculate bend allowances and ultimately the bend deduction. The part of the material that bends without being compressed nor elongated. The k factor is the most important and elusive variable of bending because it varies both as a function of the material and according to parameters such as angle and tooling. Calculate k factor bend allowance and y factor for sheet metal bending.

K value of k factor. A bending angle. Sheet metal bending methods design tips k factor bending methods. Find the material thickness mt and you ll have the information you need for calculating the k factor for sheet metal bending.

There s quite a few different bending methods available. Of all the mathematical constants used in precision sheet metal fabrication the k factor stands out as one of the most important. Mathematically this formula looks like this. To find the k factor divide the product of 180 and ba by the difference between the product of pi mt and the complementary bend angle to the ratio of ir to mt.

In above bend allowance formula except sheet metal k factor and bend allowance values. Finding y factor for sheet metal bending. It s a mathematical multiplier that allows you to locate the repositioned neutral axis of the bend after forming. The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e.

All other values are known to the user. Bend allowance ba π 180 r k t a. Space is left between the sheet and the bottom of the v opening.