Neutral Axis Sheet Metal

K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern.

Neutral axis sheet metal.

In sheet metal the k factor is the ratio of the neutral axis to the material thickness. Bend allowance plays a critical role in calculating flat length of any sheet metal part. When the sheet is flat without any applied stress the neutral axis is in the middle of the sheet. The distance between the inside surface of the part and the neutral axis is known as the neutral axis offset.

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. The k factor in sheet metal working is the ratio of the neutral axis to the material thickness. The k factor in sheet metal working is the ratio of the neutral axis to the material thickness. The k factor in this case kfactor expresses that distance as a percentage of the material s thickness.

Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. The neutral axis and considerations for bending plate. Diego plate rolling november 15 2019. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.

The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. Where t is the distance. The location of the neutral axis for a specific sheet is defined by a factor called k factor. When metal is bent the top section is going to undergo compression and the bottom section will be stretched.

The granular bonds are stretched pulled and sometimes break forcing the grains apart as they come under tensional stresses. K factor k can be defined as follows. The neutral axis and considerations for bending plate. The line where the transition from compression to stretching occurs is called the neutral axis.

When a piece of metal is being formed the inner portion of the bend compresses while the outer portion expands see figure 1. In other words the neutral axis for this part occurs kfactor 100 of the way through the material s thickness. By calculating and taking into consideration the developed lengthy a qualified metal bender roller can accurately bend plate to the desired final product. The line where the transition from compression to stretching occurs is called the neutral axis.