Sheet Metal Flat Pattern Dimensioning

Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured.

Sheet metal flat pattern dimensioning.

Mathematically k factor value is equal to the ratio of position of neutral axis and sheet thickness. Bends in sheet metal are manufactured using sheet metal brakes. You only have to insert interior angle flange lengths k factor inside radius and material thickness. 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.

As one who daily works with sheet metal design and fabrication use outside flange lengths for several reasons. When you figure flat pattern length you simple add up all the outside flanges and subtract the bend deductions. This is a common occurrence when manufacturers receive a sheet metal layout dimensioned in the flat pattern. Function goes like this.

You can use this sheet metal flat pattern calculator to calculate this increase in length. These dimensions may seem helpful but after your manufacturer makes bend deductions based on their capabilities and other bending factors your dimensions will become unusable. For example when sheet metal of length l is bend. When designing parts for laser cutting one should not make holes smaller than the thickness of the material.

I would like to set precision to 0 1mm and get rid of units mm. Pl3 0 x 120 79 mm x 250 00 mm. A 1 degree tolerance on all bend angles. K factor in sheet metal bending is a constant used to calculate sheet metal flat length or flat pattern.

To know more about sheet metal k factor and flat length calculations. Calculation flat pattern used as a template for cutting the pipe producing with wall thickness s 0. I have automated our sheet metal flat pattern dimensions to part iproperties. Cells on the right will output the desired values.

After bending the total length a b is larger than length l.