Sheet Metal Bending Radius

The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend.

Sheet metal bending radius.

The formed bend radius is dependent upon the dies used the material properties and the material thickness. The material thickness will be measured in decimal form not by the gauge number. It shall be equal to three times of sheet thickness plus bend radius. This is putting a simple hem on a curved piece of zinc with a 7ft radius.

The force must exceed the material s yield strength to achieve a plastic deformation. As explained in my first post the bend deduction can be calculated using the following equation. Ossb is defined as illustrated in figure 5 for different bending angles and can be calculated using the equation below. Bending sheet metal by hand is a manageable task if the piece of sheet metal is small and thin enough to handle.

Bend radii minimum bend sizes. This is done through the application of force on a workpiece. The bend radius refers to the inside radius. Minimum sheet metal flange bend length 3 x sheet thickness bend radius.

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. Where ossb is the outside setback. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Use this document to choose values that are both manufacturable and meet your needs.

Minimum sheet metal flange bend length is required to avoid cracks in the bending area. When sheet metal is bent it stretches in length. Most frequently expensive sheet metal bending tools called brakes are used to bend sheet metal but you can also complete this task without one. The minimum bend radius data shown in these charts is measured to the inside of the bend.

Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. Bending is one of the most common sheet metal fabrication operations. Where a is the bending angle t is the sheet thickness and r is the bending radius.