Standard Bend Radius Sheet Metal

Neutral axis the location in the sheet that is neither stretched nor compressed and therefore remains at a constant length.

Standard bend radius sheet metal.

Commercial sheet metal radius are created with less concern for stresses created during forming and radii can approach zero sharp internal corner for many thin sheet metal gages. But for harder materials e g. 1 steels with lower carbon content are easier to weld and form. Use this document to choose values that are both manufacturable and meet your needs.

The leg lengths are the part of the flange which is outside of the bend radius. We want to know the final length of the detail. Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal. First we must start with the k factor.

10 carbon content may be bent back on itself in any direction without cracking. The bend allowance is defined as the material you will add to the actual leg lengths of the part in order to develop a flat pattern. Bend radii minimum bend sizes. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm.

The outside bend radius is equal to the inside bend radius plus the sheet thickness. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. Recommended inside bend radius for sheet metal parts should be equal to material thickness. The bend radii listed are standard minimum for manufacturing for aerospace and space applications.

In our example below a part with flange lengths of 2 and 3 with an inside radius of 250 at 90 will have leg lengths of 1 625 and 2 625 respectively. Sharp inside bend radius in sheetmetal parts can cause material flow problems in soft material and fracturing in hard material. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5 t h.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Minimum bend includes minimum closeness of cutout to bend radius cold rolled steel 14 gauge 0 075 1 91mm.