Dimensioning Sheet Metal Flat Pattern

The flat pattern drawing doesn t always list these factors.

Dimensioning sheet metal flat pattern.

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. Oml outside mold line the intersection of two outside surfaces of a part extended past the bend. 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 you expand the representation of a body in the cut list the body s flat pattern appears at the end of its feature list. Keep default values in calculator as zero. Multibody sheet metal parts.

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

My boss dimensions from outside the flange walls and thinks. When producing drawings of sheet metal components i dimension from inside the flange walls. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage. If the value of sheet metal k factor and bending flange length is known.

Enter flange length internal radius and thickness values. 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. 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. Use k factor calculator to calculate k factor values. Value of bend deduction and flat pattern are shown in result section.