Dimensioning Sheet Metal Parts

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

Dimensioning sheet metal parts.

Since each metal fabricator has its own tooling bend factors and equipment to develop the flat blank it is better to fully dimension to formed views for that manufacturer. Intent of the sheet metal component. 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. My boss dimensions from outside the flange walls and thinks.

Following all sheet metal design guidelines is very difficult in the complex part. Those dimensions common to both parts are mating dimensions. But testing these exceptions before design release is a good practice. In this article we will discuss sheet metal design guidelines for manufacturing parts using sheet metal press bending.

Therefore exceptions can be there for complex features design. A 1 degree tolerance on all bend angles. 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. Fabrication tolerances for dimensional variance in sheet metal and machined parts overview protocase takes great care to manufacture your electronic enclosures parts and components as accurately as possible.

Uncontrolled dimensions on the other hand refer to the sections of the part where the bend originated from. Bends in sheet metal are manufactured using sheet metal brakes. Controlled dimension bend tolerances are standalone and therefore do not need to be considered in relation to any other bend. In dimensioning a single part its relation to mating parts must be taken into consideration.

These mating dimensions should be given on the multiview drawings in the corresponding locations as shown in b and c. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. For instance in a a guide block fits into a slot in a base. Fabrication tolerances for dimensional variance in sheet metal and machined parts.