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. Here are the steps to be followed to calculate sheet metal flat length. Keep default values in calculator as zero. Value of bend deduction and flat pattern are shown in result section.

Oml outside mold line the intersection of two outside surfaces of a part extended past the bend. And also find you fold centers more easily. Flat patterns of all bodies appear at the end of the featuremanager design tree. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb.

When producing drawings of sheet metal components i dimension from inside the flange walls. The flat pattern drawing doesn t always list these factors. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage. The flat pattern drawing doesn t always list these factors.

This can be a physical drawing or template or a computer model. Multibody sheet metal parts. Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. 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.

Lets go ahead and include all the fastener locations. My boss dimensions from outside the flange walls and thinks. If the value of sheet metal k factor and bending flange length is known. 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. 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.