Sheet Metal Bend Radius Rule Of Thumb

Relief cuts for bends must be at least one sheet s thickness in width and be longer than the bend radius.

Sheet metal bend radius rule of thumb.

The more ductile the sheet metal the. Bend radii minimum bend sizes. 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. The sheet metal design rule of thumb in this case is.

Bending is one of the most common sheet metal fabrication operations. If the material is 0 5 in. Use this document to choose values that are both manufacturable and meet your needs. Keeping the bend radius consistent will also make parts more cost effective.

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. Minimum sheet metal bend radius depends on the selection of tool and the process. If you re bending 0 020 thick material use a 0 020 radius. Sheet metal bend brakes are used to bend material into the parts desired geometry.

The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance. The force must exceed the material s yield strength to achieve a plastic deformation. 4 0 5 2. As per sheet metal design thumb rules the length of bend relief should be greater than or equal to the inside bend radius of the bend and the width of the bend relief should be greater than or equal to the sheet metal thickness.

You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. Minimum sheet metal bending radius. Here s a good rule of thumb for most materials. 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.

The inside bend radius should be equal to the thickness of the material that you re forming. Usually the preferred distance between holes and a bend is 1 5 times the sheet. Also spaces between pierced holes and bends should accommodate the bend radius h and be far enough from the bend. Now multiply that answer by the plate thickness.

Finding the true minimum bend radius for steel or aluminum plate requires a little research. Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. Note that this is just a rule of thumb. The material thickness will be measured in decimal form not by the gauge number.

This is done through the application of force on a workpiece. To prevent tearing relief should provide at bend.