Bending Factor In Sheet Metal

Then use the neutral bending radius to calculate the arc length of the neutral line circumference of circle multiplied by the bend angle as fraction of 360deg.

Bending factor in sheet metal.

Each has their own advantages. 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. K and y factors make metal bending more precise without damaging the material. I had a question on k factors for our 3 d modeling software.

Y factor k factor x π 2. The following equation relates the k factor to the bend allowance. The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e. Our design engineers typically use a factor of 0 4 for our air formed press brake parts.

You ll need the k factor to find the y factor. 90 degrees bend angle. It s a mathematical multiplier that allows you to locate the repositioned neutral axis of the bend after forming. The part of the material that bends without being compressed nor elongated.

We will start by calculating the bend allowance. To calculate y factor you should multiply k factor by pi and divide the result by two. It s the base value needed to calculate bend allowances and ultimately the bend deduction. Of all the mathematical constants used in precision sheet metal fabrication the k factor stands out as one of the most important.

. Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees. The following table is a rule of thumb. The arc length of the neutral line is the length of the sheet metal you have to leave for the bend.

Use the known k factor and the known inner bending radius to calculate the bending radius of the neutral line. The k factor is the ratio of the neutral axis location t to the material thickness mt. After bending the sheet we need to do some measurements as shown in figure 2. Calculate k factor bend allowance and y factor for sheet metal bending.

Therefore using k factor there is no need to calculate sheet metal flat length manually. Finding y factor for sheet metal bending. There s quite a few different bending methods available. Sheet metal flat length can be calculated using cad softwares.

Sheet metal bending methods design tips k factor bending methods. For example if the value of k factor for given material thickness and bending machines is known. From there we can calculate the k factor and the bend deduction. When you bend sheet metal the neutral axis shifts toward the inside surface of the bend.