Bending Sheet Metal Rules

How to design good sheet metal parts hole slot distance from bend edge.

Bending sheet metal rules.

Minimum sheet metal bending radius. If you want to make a flange that has one or two ends chamfered the previous rule of a minimum flange. Here s a good rule of thumb for most materials. 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.

For bent sheet metal variation in the raw material thickness increases the recommended precision to 0 010 in. Minimum sheet metal bend radius depends on the selection of tool and the process. 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. As a general recommendation 0 005 in.

The inside bend radius should be equal to the thickness of the material that you re forming. Bends in sheet metal are manufactured using sheet metal brakes. When slotting sheet metal at the bend axis the material s average density in the bend region is decreased. 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.

Sheet metal design guidelines. The sheet metal design rule of thumb in this case is. A 1 degree tolerance on all bend angles. There is no particular rule for how much the material should be weakened but as a rule of.

Hole distance from. 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. 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. If you re bending 0 020 thick material use a 0 020 radius.

When designing parts for laser cutting one should not make holes smaller than the thickness of the material. The more ductile the sheet metal the smaller the inner bend radius is possible. Supplying 3d models without considering these factors increases the chance. There exists a minimum flange length as stated already before.

Minimum distance between hole slot edge to bend edge is recommended to avoid metal. See the bending force chart for. Center to center distance between two holes. Runs right at the limit of precision flat sheet metal in a job shop environment.

Sheet metal design tips for bending minimum flange length. Sheet metal bending should be as perpendicular as possible to the direction of the metal fiber.