Dimensioning Sheet Metal Flat Pattern

This can be a physical drawing or template or a computer model.

Dimensioning sheet metal flat pattern.

Calculate the value bend allowance for required sheet metal bend by using below formula. And also find you fold centers more easily. Dimensions given on a flat pattern are affected by several bending factors like k factor and bend radius during the 3d modeling stage. 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.

Bend allowance ba π 180 r k t a. Value of bend deduction and flat pattern are shown in result section. Use k factor calculator to calculate k factor values. Multibody sheet metal parts.

My boss dimensions from outside the flange walls and thinks. Flat patterns of all bodies appear at the end of the featuremanager design tree. The flat pattern drawing doesn t always list these factors. 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.

Lets go ahead and include all the fastener locations. Here are the steps to be followed to calculate sheet metal flat length. Flat pattern terminology iml oml c l radius flat pattern the outline definition of the part in it s flat state before forming. Sheet metal flat length can be calculated in the following three simple steps.

Enter flange length internal radius and thickness values. The sketch and locating dimensions are retained. When producing drawings of sheet metal components i dimension from inside the flange walls. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb.

Enter k factor values. The flat pattern drawing doesn t always list these factors. Oml outside mold line the intersection of two outside surfaces of a part extended past the bend.