Dimensioning Sheet Metal Flat Pattern

Use k factor calculator to calculate k factor values.

Dimensioning sheet metal flat pattern.

Keep default values in calculator as zero. 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. My boss dimensions from outside the flange walls and thinks.

Here are the steps to be followed to calculate sheet metal flat length. Enter flange length internal radius and thickness values. The flat pattern drawing doesn t always list these factors. 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. Lets go ahead and include all the fastener locations. 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.

Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. 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. When producing drawings of sheet metal components i dimension from inside the flange walls. And also find you fold centers more easily.

Sheet metal flat length can be calculated in the following three simple steps. 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. The flat pattern drawing doesn t always list these factors. Calculate the value bend allowance for required sheet metal bend by using below formula.

This can be a physical drawing or template or a computer model. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. Flat patterns of all bodies appear at the end of the featuremanager design tree.