Bending Factor In Sheet Metal

It s a mathematical multiplier that allows you to locate the repositioned neutral axis of the bend after forming.

Bending factor in sheet metal.

The following table is a rule of thumb. Finding 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.

Therefore using k factor there is no need to calculate sheet metal flat length manually. You ll need the k factor to find the y factor. After bending the sheet we need to do some measurements as shown in figure 2. Sheet metal flat length can be calculated using cad softwares.

I had a question on k factors for our 3 d modeling software. Our design engineers typically use a factor of 0 4 for our air formed press brake parts. The part of the material that bends without being compressed nor elongated. Of all the mathematical constants used in precision sheet metal fabrication the k factor stands out as one of the most important.

The k factor is the ratio of the neutral axis location t to the material thickness mt. From there we can calculate the k factor and the bend deduction. K factor in sheet metal bending is a constant that is used to calculate sheet metal flat length. The arc length of the neutral line is the length of the sheet metal you have to leave for the bend.

Each has their own advantages. We will start by calculating the bend allowance. It s the base value needed to calculate bend allowances and ultimately the bend deduction. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees.

K and y factors make metal bending more precise without damaging the material. To calculate y factor you should multiply k factor by pi and divide the result by two. Y factor k factor x π 2. 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.

When bending a workpiece it will naturally spring back a little after the load is lifted. Use the known k factor and the known inner bending radius to calculate the bending radius of the neutral line. When you bend sheet metal the neutral axis shifts toward the inside surface of the bend. 90 degrees bend angle.

. The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e. For example if the value of k factor for given material thickness and bending machines is known. The following equation relates the k factor to the bend allowance.