Thumb Rules For Sheet Metal Design

Distance from the bend to the hole edge should be equal to or more than twice the thickness of the sheet.

Thumb rules for sheet metal design.

Inner radius or the bend radius of sheet metal should be. 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. 2 5 material thickness bend radius. The sheet metal design rule of thumb in this case is.

Followings are the important thumb rule in sheet metal design. According to a general sheet metal design thumb rule the bend relief s depth should be equal to or greater than the inside radius of the bend. Understanding the comprehensive performance of materials and the correct material selection have an important impact on product cost product performance product quality and processability. Minimum sheet metal bend radius depends on the selection of tool and the process.

Also the stretching and compression of forming can distort holes adjacent to a form or bend. Sheet metal materials are the most commonly used materials in the structural design of communication products. Minimum sheet metal bending radius. To prevent tearing relief should provide at bend.

The flange which does not have relief will result in a greater amount of distortion or tearing of the adjacent material. Few thumb rules or sheet metal design fundamentals. The width on the other hand should be equal to or larger than the sheet metal s thickness. The experts we spoke to offered these guidelines and rules of thumb for designing with sheet metal software.

Sheet metal tolerances are far more generous than machining or 3d printing tolerances. The minimum hole diameter should be equal to or more than the sheet thickness. For open hems the inside diameter should at least equal to the material thickness larger diameters tend to lose their circular shapes. Never design a hole smaller than 040 diameter unless laser cutting.

Bend relief bend relief is the notch that needs to be created for sheet metal bending. The more ductile the sheet metal the smaller the inner bend radius is possible. The rule of thumb in stamping design is to leave a minimum of 1 1 2 times material thickness between trimmed or perforated features. When using a punch press the diameter of a hole should always be equal to that of your tooling and you should never use a tool who s diameter is less than that of the material s thickness.

Design software is productive but it s not all knowing because its. A press brake creates a bend by pressing sheet metal into a die with a linear punch so design does not allow the creation of closed geometry. When a sheet metal design has small holes it requires smaller punches during operation.