Sheet Metal Flat Pattern Calculator

With this free online tool we quickly get the sheet metal bend deduction and therefore the sheet metal blank initial flat length from the finished part measurements.

Sheet metal flat pattern calculator.

The bend allowance is the amount of the neutral axis that bends. Should be subtracted from the flat pattern so the formed part arrives at the desired dimensions. The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. In this article we will discuss sheetmetal bend deduction bend allowance k factor y factor and sheet metal flat pattern calculations.

In the example above it is indicated by a dashed blue line. Cells on the right will output the desired values. For creating a cone from sheet metal or any flat material. After bending the total length a b is larger than length l.

The flat pattern of a cone is an application that calculates the parameters for a development of a right oblique or truncated cone. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. You only have to insert interior angle flange lengths k factor inside radius and material thickness. Therefore the bend allowance added to the flange lengths.

It allows you to determine either the size of raw material needed or the number of gore sections to fit on your available material. Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. For example when sheet metal of length l is bend. K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern.