Bending Factor In Sheet Metal

K factor 180 x ba π x complementary bend angle x mt ir mt 2.

Bending factor in sheet metal.

Of all the mathematical constants used in precision sheet metal fabrication the k factor stands out as one of the most important. It s a mathematical multiplier that allows you to locate the repositioned neutral axis of the bend after forming. Mathematically this formula looks like this. Calculate k factor bend allowance and y factor for sheet metal bending.

It s the base value needed to calculate bend allowances and ultimately the bend deduction. 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. 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. Bend allowance ba π 180 r k t a.

K value of k factor. Mathematically bend allowance during sheet metal bending can be calculated as. R inside bend radius. 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.

Finding y factor for sheet metal bending. A bending angle. Each has their own advantages. Find the material thickness mt and you ll have the information you need for calculating the k factor for sheet metal bending.

All other values are known to the user. The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e. The part of the material that bends without being compressed nor elongated. T sheet thickness.

Space is left between the sheet and the bottom of the v opening. In above bend allowance formula except sheet metal k factor and bend allowance values. When bending a workpiece it will naturally spring back a little after the load is lifted.