Bending Sheet Metal Rules

A 1 degree tolerance on all bend angles.

Bending sheet metal rules. There exists a minimum flange length as stated already before. The springback reasons for sheet metal bending the so called bending is the deformation of tensile stress and compressive stress on the front and back of the same plate. For bent sheet metal variation in the raw material thickness increases the recommended precision to 0 010 in. Minimum distance between hole slot edge to bend edge is recommended to avoid metal.

The more ductile the sheet metal the smaller the inner bend radius is possible. 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 sheet metal bending radius. The distance between the sheet metal bend line and edge of the hole should be two times or greater the thickness of the sheet metal.

Sheet metal design guidelines. Here s a good rule of thumb for most materials. The inside bend radius should be equal to the thickness of the material that you re forming. The sheet metal design rule of thumb in this case is.

Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5t h. Sheet metal bending should be as perpendicular as possible to the direction of the metal fiber. How to design good sheet metal parts hole slot distance from bend edge. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured.

Minimum sheet metal bend radius depends on the selection of tool and the process. There is no particular rule for how much the material should be weakened but as a rule of. See the bending force chart for. Sheet metal design tips for bending minimum flange length.

Once the plate is bent to the target angle the material will bounce back to its original shape once the pressure is removed due to tensile stress and compressive stress. Hole distance from. When slotting sheet metal at the bend axis the material s average density in the bend region is decreased. Minimum center to center distance between two holes in sheet.

In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend. When designing parts for laser cutting one should not make holes smaller than the thickness of the material. Supplying 3d models without considering these factors increases the chance. Runs right at the limit of precision flat sheet metal in a job shop environment.

Center to center distance between two holes. If you re bending 0 020 thick material use a 0 020 radius.