Bending Factor In Sheet Metal

Bend allowance ba π 180 r k t a.

Bending factor in sheet metal.

It s the base value needed to calculate bend allowances and ultimately the bend deduction. T sheet thickness. All other values are known to the user. It s a mathematical multiplier that allows you to locate the repositioned neutral axis of the bend after forming.

In above bend allowance formula except sheet metal k factor and bend allowance values. 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. Each has their own advantages. K value of k factor.

Mathematically bend allowance during sheet metal bending can be calculated as. Calculate k factor bend allowance and y factor for sheet metal bending. There s quite a few different bending methods available. Sheet metal bending methods design tips k factor bending methods.

The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e. Mathematically this formula looks like this. Space is left between the sheet and the bottom of the v opening. 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. When bending a workpiece it will naturally spring back a little after the load is lifted. Finding y factor for sheet metal bending. A bending angle.

R inside bend radius. Find the material thickness mt and you ll have the information you need for calculating the k factor for sheet metal bending. The bending radius must be at least 0 8 t to 2 t for sheet steel.