Sheet Metal Bend Relief Guidelines

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

Sheet metal bend relief guidelines.

Bends should be toleranced plus or minus one half degree at a location adjacent to the bends. 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. If it is ok for the metal to rip the minimum bend relief is zero. When the sheet metal bend is parallel to the direction of the fiber of the metal material cracks are likely to occur at the bend of the sheet metal and the bending strength is low and it is easy to break as shown in the following figure.

Keeping the bend radius consistent will also make parts more cost effective. Center to center distance between two holes. Avoid large sheet metal parts with small bent flanges. To eliminate this a bend relief is added so the edge of the sheet metal is perpendicular to the bend.

Minimum distance between hole slot edge to bend edge is recommended to avoid metal. 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. Sheet metal bend brakes are used to bend material into the parts desired geometry. For the ease of manufacturing multiple bends on the same plane should occur in the same direction.

One benefit of a bend relief is that it makes the part easier to produce. How to design good sheet metal parts hole slot distance from bend edge. Sheet metal bending should be as perpendicular as possible to the direction of the metal fiber. This is an example of dfm guidelines for sheetmetal fabrication.

Grain structure in the metal sheet is critical for avoiding cracks in sheet metal parts with lugs or tabs that are cut on. Sheet metal design guidelines. Design for manufacturability sheet metal guidelines bends for the ease of manufacturing multiple bends on the same plane should occur in the same direction. Avoid large sheet metal parts with small bent flanges.

Bend relief and collars near pierced areas strengthen sheet metal parts.