Neutral Factor Sheet Metal

The line where the transition from compression to stretching occurs is called the neutral axis.

Neutral factor sheet metal.

It is the fraction of material thickness from the inside of the bend to the neutral axis. K factor a constant determined by dividing the thickness of the sheet by the location of the neutral axis which is the part of sheet metal that does not change length. In this article we will discuss sheetmetal bend deduction bend allowance k factor y factor and sheet metal flat pattern calculations. Bending angle is 90.

For example the following part that has a 90 o bend. After bending the sheet insert the inner radius and flanges a and b. The neutral axis does not suffer any change of length during a bending operation. The k factor is the ratio of the neutral axis location t to the material thickness mt.

The location of the neutral axis is specified with the k factor. I had a question on k factors for our 3 d modeling software. So if the thickness of the sheet was a distance of t 1 mm and the location of the neutral axis was a distance of t 0 5 mm measured from the inside bend then you would have a k factor of t t 0 5 1 0 5. 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. Use the known k factor and the known inner bending radius to calculate the bending radius of the neutral line. To calculate the bend allowance the k factor and the derived coefficient called the y factor insert the thickness and initial length of the sheet into the cells on the left. The location of the neutral axis varies and is based on the material s physical properties and its thickness.

The k factor is a constant determined by dividing the material thickness of the sheet by the location of the neutral axis. The area within the sheet defined as the neutral axis does not get compressed on the inside of the neutral axis or expanded on the outside. This is defined as the length of the neutral fibre from the beginning to the end of the arc generated by the bend. Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness.

Flat blank dimensions are calculated by determining the path length along the neutral axis. K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern.