Sheet Metal Flat Pattern Calculator

For creating a cone from sheet metal or any flat material.

Sheet metal flat pattern calculator.

The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length. 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. It allows you to determine either the size of raw material needed or the number of gore sections to fit on your available material. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

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. In the example above it is indicated by a dashed blue line. Because a bend deduction can be measured in a physical part it is the most accurate way to calculate a material s stretch.

Cells on the right will output the desired values. Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. After bending the total length a b is larger than length l. The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend.

Therefore the bend allowance added to the flange lengths. In this article we will discuss sheetmetal bend deduction bend allowance k factor y factor and sheet metal flat pattern calculations. You can use this sheet metal flat pattern calculator to calculate this increase in length. For example when sheet metal of length l is bend.