Bent Sheet Metal Tolerances

Refer to the chart for values for folder as well as various press brake tooling combinations.

Bent sheet metal tolerances.

The tolerances in the table and attachments reflect current manufacturing practices and commercial standards and are not representative of the manufacturer s standard gauge which has no inherent tolerances. Fabrication tolerances for dimensional variance in sheet metal and machined parts. Why then do press brake operators still have so many tryout parts. The force must exceed the material s yield strength to achieve a plastic deformation.

The science of sheet metal bending has proven formulas for bend allowances and bend deductions that account for material elongation for given materials. Maximum sheet thickness for wgw s235jr stained and oiled is 8 mm. While both can achieve highly accurate bends each type of equipment offers its own advantages. For sheet metal parts iso 27 68 mk is used.

Bending is one of the most common sheet metal fabrication operations. This is done through the application of force on a workpiece. Critical tolerances at. Sheet metal guage tolerances.

During the rolling process the rollers bow slightly which results in the sheets being thinner on the edges. As per design requirements and manufacturing capability tolerance class is defined. Maximum dimensions are 2980 x 1200 mm. Maximum weight is 40 kg.

Our bending equipment consists of folders and press brakes. And for machined components iso 27 68 fh can be used. Geometry of tooling imposes a minimum bend dimension. This is because sheet metal bending tolerances are large especially when sheet metal has multiple bends.

Well it can be with realistic tolerancing. Maximum sheet thickness for aluminum and stainless steel is 6 mm. Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. Why can t bending be simpler.

In the above example m and k has defined the tolerance. The diagram shows one such mechanism. By no means do bending tolerances need to be. As can be seen from the above table the more times the sheet metal is bent the greater the bending tolerance.

General tolerance iso 2768 does not specify where to use these tolerances. Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend. Maximum sheet thickness for all other steel is 6 mm. Maximum sheet thickness for corten steel bent products is 4 mm.