Dimensioning Sheet Metal Drawings

When producing drawings of sheet metal components i dimension from inside the flange walls.

Dimensioning sheet metal drawings. In dimensioning a single part its relation to mating parts must be taken into consideration. The sheet metal cleat the work of this problem will consist in laying out to full size the views and pattern for a galvanized sheet metal cleat. This makes matching these dimensions during the modeling stage difficult and time consuming. Revision of engineering drawings and associated documents asme archived from the original on 2013 04 14.

Ref harv french thomas e. Abbreviations and acronyms for use on drawings and related documents asme. For instance in a a guide block fits into a slot in a base. Autodesk inventor sheet metal tutorial basics https youtu be zqqqcrntyhk in this tutorial video we will learn how to create drawing base view projected v.

Intent of the sheet metal component. These mating dimensions should be given on the multiview drawings in the corresponding locations as shown in b and c. I still believe inside dimensioning is preferable for producing quick non critical drawings of sheet metal components and find it easier myself to read these drawings when i am folding up something for myself and a lot of tradesmen agree but also now believe outside dimensioning. Those dimensions common to both parts are mating dimensions.

How to dimension a drawing. However to match the other dimensions that are included it would require your manufacturer to work with incorrect or unachievable sheet metal forming factors. Accuracy in the use of the scale rule. The flat pattern drawing doesn t always list these factors.

In making the layout for this cleat the following points must be kept in mind. My boss dimensions from outside the flange walls and thinks. 3d cad files are converted into machine code which controls a machine to precisely cut and form the sheets into the final part. Sheet metal fabrication is the process of forming parts from a metal sheet by punching cutting stamping and bending.

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.