Sheet Metal Bend Relief Guidelines

Sheet metal bending should be as perpendicular as possible to the direction of the metal fiber.

Sheet metal bend relief guidelines.

Minimum center to center distance between two holes in sheet. Avoid large sheet metal parts with small bent flanges. If it is ok for the metal to rip the minimum bend relief is zero. Grain structure in the metal sheet is critical for avoiding cracks in sheet metal parts with lugs or tabs that are cut on.

Minimum distance between hole slot edge to bend edge is recommended to avoid metal. Bend relief and collars near pierced areas strengthen sheet metal parts. Bends should be toleranced plus or minus one half degree at a location adjacent to the bends. Hole to form distance from hole to form to avoid hole distortion place holes no less than 2 5.

To eliminate this a bend relief is added so the edge of the sheet metal is perpendicular to the bend. Bend relief provide bend relief along l shaped features width 2 t and depth t r edge bulging restrictive tolerances on v bends may result in edge bulging provide bend relief accordingly. In general a minimum bend relief is equal to the material thickness plus the inside bend radius. Avoid large sheet metal parts with small bent flanges.

For the ease of manufacturing multiple bends on the same plane should occur in the same direction. Center to center distance between two holes. This is an example of dfm guidelines for sheetmetal fabrication. Keeping the bend radius consistent will also make parts more cost effective.

One benefit of a bend relief is that it makes the part easier to produce. Sheet metal bend brakes are used to bend material into the parts desired geometry. Bends that are in the same plane need to be designed in the same direction to avoid part re orientation to save both money and time. Design for manufacturability sheet metal guidelines bends for the ease of manufacturing multiple bends on the same plane should occur in the same direction.

Sheet metal design guidelines.