Dimensioning Sheet Metal Flat Pattern

Enter flange length internal radius and thickness values.

Dimensioning sheet metal flat pattern.

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. 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. Oml outside mold line the intersection of two outside surfaces of a part extended past the bend.

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. And also find you fold centers more easily. Lets go ahead and include all the fastener locations. 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. Here are the steps to be followed to calculate sheet metal flat length. The sketch and locating dimensions are retained. This can be a physical drawing or template or a computer model.

Use k factor calculator to calculate k factor values. Value of bend deduction and flat pattern are shown in result section. 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. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage.

Keep default values in calculator as zero. If the value of sheet metal k factor and bending flange length is known. My boss dimensions from outside the flange walls and thinks. Multibody sheet metal parts.

Calculate the value bend allowance for required sheet metal bend by using below formula. Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. Enter k factor values.