Thumb Rules For Sheet Metal Design

For open hems the inside diameter should at least equal to the material thickness larger diameters tend to lose their circular shapes.

Thumb rules for sheet metal design.

The minimum hole diameter should be equal to or more than the sheet thickness. The flange which does not have relief will result in a greater amount of distortion or tearing of the adjacent material. Bend relief bend relief is the notch that needs to be created for sheet metal bending. And the return length should be at least 4.

To prevent tearing relief should provide at bend. Sheet metal materials are the most commonly used materials in the structural design of communication products. Holes are best kept at least 2 times material thickness beyond the radius of a formed feature. 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.

Design software is productive but it s not all knowing because its. 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. The rule of thumb in stamping design is to leave a minimum of 1 1 2 times material thickness between trimmed or perforated features.

Also the stretching and compression of forming can distort holes adjacent to a form or bend. The width on the other hand should be equal to or larger than the sheet metal s thickness. 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. Never design a hole smaller than 040 diameter unless laser cutting.

Followings are the important thumb rule in sheet metal design. Distance from the bend to the hole edge should be equal to or more than twice the thickness of the sheet. Minimum sheet metal bend radius depends on the selection of tool and the process. Understanding the comprehensive performance of materials and the correct material selection have an important impact on product cost product performance product quality and processability.

The experts we spoke to offered these guidelines and rules of thumb for designing with sheet metal software. When a sheet metal design has small holes it requires smaller punches during operation. The top ten. 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.

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