Minimum Bend Radius For Sheet Metal Parts

A 1 degree tolerance on all bend angles.

Minimum bend radius for sheet metal parts.

Posted by product design engineer on november 23 2009 at 1 55pm in mechanical engineering. I ve seen a few things online suggesting 1 5 x material thickness. When designing parts for laser cutting one should not make holes smaller than the thickness of the material. But for harder materials e g.

Thus the smallest radius of any bend in a sheet should be at least equal to the thickness of the sheet. Now we take the height of arc value for our new bend angle and we plug it into the following formula. Recommended inside bend radius for sheet metal parts should be equal to material thickness. Height of arc 2 material thickness 2 inside radius 0 201 2 0 01562 inside bend radius 0 201 0 031 0 170 in.

Height of arc outside bend radius. Upon close examination of the bends we find that the sheet metal stretches on the outer surface and that the inside surface seems to shrink. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. Bend radii minimum bend sizes.

Layout method sheet metal stretches when it bends is an oversimplification. Each and every bend in a piece of sheet metal has a certain minimum internal radius that needs to be taken into account when planning the design of a sheet metal form. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Bend radii minimum bend sizes.

Bends in sheet metal are manufactured using sheet metal brakes. Bend radii and minimum bends are limited to certain values or ranges which are determined by the equipment and tooling combinations available to the manufacturer. Use this document to choose values that are both manufacturable and meet your needs. If a piece of material is bent too tightly problems can occur.

For bent sheet metal variation in the raw material thickness increases the recommended precision to 0 010 in. Below is xometry s minimum bend radius reference table which is based on. Minimum bend radius for sheet metal parts. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5t h.

Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. The problem with bending too tightly. For example if the thickness of the sheet is 1 mm the minimum bend radius should be 1 mm. Supplying 3d models without considering these factors increases the chance.