Dimensioning Sheet Metal Flat Pattern

I think this is the better way because you can acquire your cutting length without a flat pattern by adding the inside lengths fold allowance.

Dimensioning sheet metal flat pattern.

The sketch and locating dimensions are retained. When producing drawings of sheet metal components i dimension from inside the flange walls. Sheet metal flat length can be calculated in the following three simple steps. Enter k factor values.

Lets go ahead and include all the fastener locations. Oml outside mold line the intersection of two outside surfaces of a part extended past the bend. This can be a physical drawing or template or a computer model. Generally capabilities of of 0 9mm 20mm in thickness are able to be manufactured from sheet 3mm or plate 3mm but this tolerance depends mainly on the part.

Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. Bend allowance ba π 180 r k t a. Use k factor calculator to calculate k factor values. Value of bend deduction and flat pattern are shown in result section.

Enter flange length internal radius and thickness values. Multibody sheet metal parts. Here are the steps to be followed to calculate sheet metal flat length. The flat pattern drawing doesn t always list these factors.

My boss dimensions from outside the flange walls and thinks. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. Keep default values in calculator as zero. Calculate the value bend allowance for required sheet metal bend by using below formula.

And also find you fold centers more easily. If the value of sheet metal k factor and bending flange length is known. Flat patterns of all bodies appear at the end of the featuremanager design tree.