Dimensioning Sheet Metal Parts

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.

Dimensioning sheet metal parts. In dimensioning a single part its relation to mating parts must be taken into consideration. When designing parts for laser cutting one should not make holes smaller than the thickness of the material. These mating dimensions should be given on the multiview drawings in the corresponding locations as shown in b and c. Intent of the sheet metal component.

Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. Bends in sheet metal are manufactured using sheet metal brakes. My boss dimensions from outside the flange walls and thinks. And also find you fold centers more easily.

Fabrication tolerances for dimensional variance in sheet metal and machined parts. Controlled dimension bend tolerances are standalone and therefore do not need to be considered in relation to any other bend. 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. Your manufacturer may not be able to match dimensions when creating the actual sheet metal part due to tooling and equipment limitations.

But testing these exceptions before design release is a good practice. When producing drawings of sheet metal components i dimension from inside the flange walls. 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 overview protocase takes great care to manufacture your electronic enclosures parts and components as accurately as possible.

Following all sheet metal design guidelines is very difficult in the complex part. Uncontrolled dimensions on the other hand refer to the sections of the part where the bend originated from. Those dimensions common to both parts are mating dimensions. Therefore exceptions can be there for complex features design.