Sheet Metal Bend Relief Guidelines

Center to center distance between two holes.

Sheet metal bend relief guidelines. Bend relief and collars near pierced areas strengthen sheet metal parts. Hole to form distance from hole to form to avoid hole distortion place holes no less than 2 5. 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. One benefit of a bend relief is that it makes the part easier to produce.

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. Minimum center to center distance between two holes in sheet. Bends should be toleranced plus or minus one half degree at a location adjacent to the bends. Sheet metal design guidelines.

Avoid large sheet metal parts with small bent flanges. 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. In general a minimum bend relief is equal to the material thickness plus the inside bend radius.

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. Keeping the bend radius consistent will also make parts more cost effective. Grain structure in the metal sheet is critical for avoiding cracks in sheet metal parts with lugs or tabs that are cut on.

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. If it is ok for the metal to rip the minimum bend relief is zero.

In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm.