Sheet Metal Corner Relief Design

Bends in sheet metal are manufactured using sheet metal brakes.

Sheet metal corner relief design.

Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. When sheet metal makes a transition from a bend to a flat surface or to another bend it tends to rip and tear. Bend relief is provided at the end of bending edge in sheet metal design to avoid any crack tearing in the corner. When designing parts for laser cutting one should not make holes smaller than the thickness of the material.

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. A 1 degree tolerance on all bend angles. To eliminate this a bend relief is added so the edge of the sheet metal is perpendicular to the bend. Relief helps to control sheet metal material behavior and to prevent unwanted deformation during unbend operations.

Relief height is generally kept greater than two times of sheet thickness plus bend radius. Figure 3 figure 4 figure 5 figure 6. Depending on the types of parts that you design you may have to create additional sheet metal features. In general a minimum bend relief is equal to the material thickness plus the inside bend radius.