Dimensioning Formed Sheet Metal

And also find you fold centers more easily.

Dimensioning formed sheet metal.

Trilux manufactures more than 9 000 sheet metal products including intricate luminaire bodies that form the basis of a commercial lighting unit. My boss dimensions from outside the flange walls and thinks this is the. Hit the hem just right and the numbers work. Fortunately hems are rarely specified on tight tolerance flanges.

Their standard measuring process involved traditional equipment visual exams conducted by floor operators and templates that were often created in house. Hit it softer or harder than necessary and the flange dimension changes. It is always better to specify hole diameters that are greater than the sheet s thickness t. Hem measurement forming hems is one of those aspects of sheet metal that is very operator dependent.

Your manufacturer may not be able to match dimensions when creating the actual sheet metal part due to tooling and equipment limitations. Sheet metal is any metal that has a thickness in between 0 5 6 millimetres. In a sheet metal design specifying hole sizes locations and their alignment is critical. 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.

5 edge distortion an exaggerated example of edge deformation is pictured in figure a below. One needs to check that these factors are consistent with the tooling that will be used in manufacturing. When producing drawings of sheet metal components i dimension from inside the flange walls. There are other measurement units used to categorise metals by thickness though.

Sheet metal is one of the shapes and forms metal can be bought in. Some critical dimensions that need to be considered when setting up sheet metal in cad software are sheet metal thickness the k factor and bend radius. Form height to thickness ratio to determine the minimum form height for sheet metal use the following formula.