Dimensioning Sheet Metal Flat Pattern

The flat pattern drawing doesn t always list these factors.

Dimensioning sheet metal flat pattern.

Lets go ahead and include all the fastener locations. The sketch and locating dimensions are retained. Keep default values in calculator as zero. Enter flange length internal radius and thickness values.

Sheet metal flat length can be calculated in the following three simple steps. Calculate the value bend allowance for required sheet metal bend by using below formula. 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. Bend allowance ba π 180 r k t a.

Value of bend deduction and flat pattern are shown in result section. Multibody sheet metal parts. My boss dimensions from outside the flange walls and thinks. 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.

Flat patterns of all bodies appear at the end of the featuremanager design tree. Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. When producing drawings of sheet metal components i dimension from inside the flange walls. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb.

And also find you fold centers more easily. The flat pattern drawing doesn t always list these factors. This can be a physical drawing or template or a computer model. When you expand the representation of a body in the cut list the body s flat pattern appears at the end of its feature list.

Oml outside mold line the intersection of two outside surfaces of a part extended past the bend. Use k factor calculator to calculate k factor values. Here are the steps to be followed to calculate sheet metal flat length.