Neutral Axis Sheet Metal

When the sheet is flat without any applied stress the neutral axis is in the middle of the sheet.

Neutral axis sheet metal.

The distance between the inside surface of the part and the neutral axis is known as the neutral axis offset. The location of the neutral axis for a specific sheet is defined by a factor called k factor. K factor k can be defined as follows. The line where the transition from compression to stretching occurs is called the neutral axis.

K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern. The neutral axis and considerations for bending plate. The granular bonds are stretched pulled and sometimes break forcing the grains apart as they come under tensional stresses. The k factor in this case kfactor expresses that distance as a percentage of the material s thickness.

The line where the transition from compression to stretching occurs is called the neutral axis. By calculating and taking into consideration the developed lengthy a qualified metal bender roller can accurately bend plate to the desired final product. When metal is bent the top section is going to undergo compression and the bottom section will be stretched. In sheet metal the k factor is the ratio of the neutral axis to the material thickness.

The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. When a piece of metal is being formed the inner portion of the bend compresses while the outer portion expands see figure 1. Let us discuss in detail about bend allowance k factor and y factor.

Where t is the distance. K factor is a ratio that represents the location of the neutral axis with respect to the thickness of the sheet metal part and depends on material thickness and bend radius. In other words the neutral axis for this part occurs kfactor 100 of the way through the material s thickness. Bend allowance plays a critical role in calculating flat length of any sheet metal part.

Diego plate rolling november 15 2019. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. The neutral axis and considerations for bending plate. But add a little stress and force the metal to bend and watch what happens.