Dimensioning Sheet Metal Flat Pattern

The flat pattern drawing doesn t always list these factors.

Dimensioning sheet metal flat pattern. Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. Use k factor calculator to calculate k factor values. 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.

And also find you fold centers more easily. 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. Here are the steps to be followed to calculate sheet metal flat length. The flat pattern drawing doesn t always list these factors.

When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. 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. If the value of sheet metal k factor and bending flange length is known. Keep default values in calculator as zero.

Lets go ahead and include all the fastener locations. Sheet metal flat length can be calculated in the following three simple steps. Enter k factor values. Multibody sheet metal parts.

Flat patterns of all bodies appear at the end of the featuremanager design tree. 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. Bend allowance ba π 180 r k t a.

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. Enter flange length internal radius and thickness values. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage.