Dimensioning Sheet Metal Flat Pattern

Use k factor calculator to calculate k factor values.

Dimensioning sheet metal flat pattern. Bend allowance ba π 180 r k t a. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage. Flat patterns of all bodies appear at the end of the featuremanager design tree. Sheet metal flat length can be calculated in the following three simple steps.

The flat pattern drawing doesn t always list these factors. Enter flange length internal radius and thickness values. Keep default values in calculator as zero. My boss dimensions from outside the flange walls and thinks.

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. The sketch and locating dimensions are retained. Here are the steps to be followed to calculate sheet metal flat length. If the value of sheet metal k factor and bending flange length is known.

Oml outside mold line the intersection of two outside surfaces of a part extended past the bend. Lets go ahead and include all the fastener locations. The flat pattern drawing doesn t always list these factors. And also find you fold centers more easily.

Multibody sheet metal parts. When producing drawings of sheet metal components i dimension from inside the flange walls. Value of bend deduction and flat pattern are shown in result section. 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.

Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. Calculate the value bend allowance for required sheet metal bend by using below formula.