Dimensioning Sheet Metal Flat Pattern

Use k factor calculator to calculate k factor values.

Dimensioning sheet metal flat pattern. 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. 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. The flat pattern drawing doesn t always list these factors. When producing drawings of sheet metal components i dimension from inside the flange walls.

Enter flange length internal radius and thickness values. Value of bend deduction and flat pattern are shown in result section. Keep default values in calculator as zero. Sheet metal flat length can be calculated in the following three simple steps.

When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. If the value of sheet metal k factor and bending flange length is known. The flat pattern drawing doesn t always list these factors. And also find you fold centers more easily.

This can be a physical drawing or template or a computer model. Bend allowance ba π 180 r k t a. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage. 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.

My boss dimensions from outside the flange walls and thinks. Enter k factor values. Calculate the value bend allowance for required sheet metal bend by using below formula. Here are the steps to be followed to calculate sheet metal flat length.

Multibody sheet metal parts. The sketch and locating dimensions are retained. Flat patterns of all bodies appear at the end of the featuremanager design tree.