Neutral Line In Sheet Metal

Free delivery with 45 order.

Neutral line in sheet metal.

The neutral axis is the zone or plane that separates the tension from the compression. To calculate r which is the radius of the arc on the neutral axis we can use the following equation. Our design engineers typically use a factor of 0 4 for our air formed press brake parts. The k factor is the ratio of the neutral axis location t to the material thickness mt.

By using it you get the bend allowance which is in essence the length of the curved neutral axis. I had a question on k factors for our 3 d modeling software. Neutral axis an imaginary line that has the same length after bending as it had before bending. 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. Notice how the sheet has thinned at the bend. Figure 2 after bending the bend area is 10 to 15 percent thinner than before bending. The neutral line is an imaginary line that passes somewhere close to the middle of the material.

It varies according to material its thickness bend radius and bending method. The line where the transition from compression to stretching occurs is called the neutral axis. Basically the k factor offsets the neutral line to provide a flat pattern that reflects reality. And by having t and the sheet thickness t we can calculate the k factor as follow.

When metal is bent the top section is going to undergo compression and the bottom section will be stretched. Set your store to see local availability add to cart. M d building products 1 ft. 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.

When you bend sheet metal the neutral axis shifts toward the inside surface of the bend. 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. Look closely a figure 1.

The neutral axis s behavior is the main reason the flat part needs to be smaller than the total of the formed piece s outside dimensions. Satin nick elliptical aluminum sheet model 57010 18 98 18 98. If the material did not stretch at all then the neutral line would be at 50 of the material. The neutral axis position depends on the bend angle inside bend radius and method of forming.

Free delivery with 45 order. 22 gauge metal sheet model 801447 8 98 8 98.