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 arc length of the neutral line is the length of the sheet metal you have to leave for the bend. The part of the material that bends without being compressed nor elongated. The following table is a rule of thumb. You ll need the k factor to find the y factor.

. Calculate k factor bend allowance and y factor for sheet metal bending. 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. I had a question on k factors for our 3 d modeling software.

From there we can calculate the k factor and the bend deduction. The following equation relates the k factor to the bend allowance. There s quite a few different bending methods available. Our design engineers typically use a factor of 0 4 for our air formed press brake parts.

K factor in sheet metal bending is a constant that is used to calculate sheet metal flat length. Of all the mathematical constants used in precision sheet metal fabrication the k factor stands out as one of the most important. Therefore using k factor there is no need to calculate sheet metal flat length manually. After bending the sheet we need to do some measurements as shown in figure 2.

Finding y factor for sheet metal bending. To calculate y factor you should multiply k factor by pi and divide the result by two. The k factor is the ratio of the neutral axis location t to the material thickness mt. K and y factors make metal bending more precise without damaging the material.

How k and y factors affect metal bending. When you bend sheet metal the neutral axis shifts toward the inside surface of the bend. We will start by calculating the bend allowance. 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.

Y factor k factor x π 2. Sheet metal bending methods design tips k factor bending methods. 90 degrees bend angle. Sheet metal flat length can be calculated using cad softwares.

Each has their own advantages. It s the base value needed to calculate bend allowances and ultimately the bend deduction. The k factor is defined as the ratio between the material thickness t and the neutral fibre axis t i e. Use the known k factor and the known inner bending radius to calculate the bending radius of the neutral line.