Neutral Line In Sheet Metal

Its location in the material is a function of the forces used to form the part and the material yield and tensile strengths.

Neutral line in sheet metal.

Neutral axis an imaginary line that has the same length after bending as it had before bending. And by having t and the sheet thickness t we can calculate the k factor as follow. The line where the transition from compression to stretching occurs is called the neutral axis. Figure 2 after bending the bend area is 10 to 15 percent thinner than before bending.

When metal is bent the top section is going to undergo compression and the bottom section will be stretched. M d building products 1 ft. 22 gauge metal sheet model 801447 8 98 8 98. Our design engineers typically use a factor of 0 4 for our air formed press brake parts.

To calculate r which is the radius of the arc on the neutral axis we can use the following equation. It varies according to material its thickness bend radius and bending method. By using it you get the bend allowance which is in essence the length of the curved neutral axis. A is the bending angle in the above equation so.

The k factor in sheet metal working is the ratio of the neutral axis to the material thickness. The neutral line is an imaginary line that passes somewhere close to the middle of the material. The neutral line also called the neutral axis is an imaginary line that can be drawn through a cross section of the workpiece that represents the locus where no tensile nor compressive stresses are present on the work. The location of the neutral axis varies and is based on the material s physical properties and its thickness.

To calculate the neutral axis distance from the inner face t we can subtract inside bend radius from r. When you bend sheet metal the neutral axis shifts toward the inside surface of the bend. Satin nick elliptical aluminum sheet model 57010 18 98 18 98. The neutral axis position depends on the bend angle inside bend radius and method of forming.

If the material did not stretch at all then the neutral line would be at 50 of the material. Look closely a figure 1. The k factor is the ratio of the neutral axis location t to the material thickness mt. Set your store to see local availability add to cart.

Notice how the sheet has thinned at the bend. It is the area where the material neither stretches nor compresses in the bend. I had a question on k factors for our 3 d modeling software. Free delivery with 45 order.

Basically the k factor offsets the neutral line to provide a flat pattern that reflects reality. Free delivery with 45 order.