Dimensioning Sheet Metal Drawings

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Dimensioning sheet metal drawings.

When producing drawings of sheet metal components i dimension from inside the flange walls. Ref harv asme 2007 y14 38 2007. In dimensioning a single part its relation to mating parts must be taken into consideration. The proper relation of views in a drawing.

Those dimensions common to both parts are mating dimensions. My boss dimensions from outside the flange walls and thinks. In making the layout for this cleat the following points must be kept in mind. 3d cad files are converted into machine code which controls a machine to precisely cut and form the sheets into the final part.

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. 1953 a manual of engineering. However to match the other dimensions that are included it would require your manufacturer to work with incorrect or unachievable sheet metal forming factors. How to dimension a drawing.

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. Abbreviations and acronyms for use on drawings and related documents asme. Intent of the sheet metal component. 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.

Ref harv french thomas e. Accuracy in the use of the scale rule. This makes matching these dimensions during the modeling stage difficult and time consuming. These mating dimensions should be given on the multiview drawings in the corresponding locations as shown in b and c.

And also find you fold centers more easily. For instance in a a guide block fits into a slot in a base.