Bending Factor In Sheet Metal

T sheet thickness.

Bending factor in sheet metal.

Bend allowance ba π 180 r k t a. K factor 180 x ba π x complementary bend angle x mt ir mt 2. Sheet metal bending methods design tips k factor bending methods. R inside bend radius.

Of all the mathematical constants used in precision sheet metal fabrication the k factor stands out as one of the most important. Space is left between the sheet and the bottom of the v opening. Each has their own advantages. 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.

The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e. A bending angle. Mathematically bend allowance during sheet metal bending can be calculated as. Find the material thickness mt and you ll have the information you need for calculating the k factor for sheet metal bending.

K value of k factor. All other values are known to the user. When bending a workpiece it will naturally spring back a little after the load is lifted. 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.

Mathematically this formula looks like this. In above bend allowance formula except sheet metal k factor and bend allowance values. Finding y factor for sheet metal bending. The bending radius must be at least 0 8 t to 2 t for sheet steel.

There s quite a few different bending methods available. 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.