Neutral Line In Sheet Metal

If the material did not stretch at all then the neutral line would be at 50 of the material.

Neutral line in sheet metal.

22 gauge metal sheet model 801447 8 98 8 98. The neutral axis is the zone or plane that separates the tension from the compression. I had a question on k factors for our 3 d modeling software. The location of the neutral axis varies and is based on the material s physical properties and its thickness.

Our design engineers typically use a factor of 0 4 for our air formed press brake parts. Satin nick elliptical aluminum sheet model 57010 18 98 18 98. Free delivery with 45 order. The neutral axis position depends on the bend angle inside bend radius and method of forming.

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. 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 k factor is the ratio of the neutral axis location t to the material thickness mt.

A is the bending angle in the above equation so. It varies according to material its thickness bend radius and bending method. Notice how the sheet has thinned at the bend. The line where the transition from compression to stretching occurs is called the neutral axis.

Look closely a figure 1. The k factor in sheet metal working is the ratio of the neutral axis to the material thickness. When you bend sheet metal the neutral axis shifts toward the inside surface of the bend. M d building products 1 ft.

To calculate the neutral axis distance from the inner face t we can subtract inside bend radius from r. By using it you get the bend allowance which is in essence the length of the curved neutral axis. Free delivery with 45 order. 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.

Set your store to see local availability add to cart. To calculate r which is the radius of the arc on the neutral axis we can use the following equation. Its location in the material is a function of the forces used to form the part and the material yield and tensile strengths. This thinning of the bend area moves the neutral line of the metal in towards the radius center.

When metal is bent the top section is going to undergo compression and the bottom section will be stretched. Basically the k factor offsets the neutral line to provide a flat pattern that reflects reality.