Sheet Metal Corner Relief Design

In general a minimum bend relief is equal to the material thickness plus the inside bend radius.

Sheet metal corner relief design.

The resulting model faces are all nicely trimmed and all have appropriate corner relief in the flat pattern. Figure 3 figure 4 figure 5 figure 6. Bend relief is provided at the end of bending edge in sheet metal design to avoid any crack tearing in the corner. Bends in sheet metal are manufactured using sheet metal brakes.

When sheet metal makes a transition from a bend to a flat surface or to another bend it tends to rip and tear. You can define corner relief settings during feature creation or you can predefine them in the relief area of the sheetmetal preferences dialog box or using sheet metal parameters. Relief height is generally kept greater than two times of sheet thickness plus bend radius. Relief helps to control sheet metal material behavior and to prevent unwanted deformation during unbend operations.

Depending on the types of parts that you design you may have to create additional sheet metal features. When designing parts for laser cutting one should not make holes smaller than the thickness of the material. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. A 1 degree tolerance on all bend angles.