Dimensioning Sheet Metal Flat Pattern

Flat patterns of all bodies appear at the end of the featuremanager design tree.

Dimensioning sheet metal flat pattern.

Use k factor calculator to calculate k factor values. The sketch and locating dimensions are retained. Multibody sheet metal parts. The flat pattern drawing doesn t always list these factors.

Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. Enter flange length internal radius and thickness values. 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. Here are the steps to be followed to calculate sheet metal flat length.

When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. Value of bend deduction and flat pattern are shown in result section. This can be a physical drawing or template or a computer model. Keep default values in calculator as zero.

When producing drawings of sheet metal components i dimension from inside the flange walls. My boss dimensions from outside the flange walls and thinks. 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.

If the value of sheet metal k factor and bending flange length is known. Sheet metal flat length can be calculated in the following three simple steps. 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.

Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage. Enter k factor values. Calculate the value bend allowance for required sheet metal bend by using below formula.