Bend Radius For Sheet Metal Rule Of Thumb

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.

Bend radius for sheet metal rule of thumb.

For bends notches must be at least 3 times the material s thickness plus the bend radius. If the die opening is 0 551 in. So if the metal plate is 75 thick you would multiply 4 x 75 3 so your minimum inside bend radius would be roughly 3 times the thickness of the material in this case or 2 25. If you re bending 0 020 thick material use a 0 020 radius.

If the material is 0 5 in. Here s a good rule of thumb for most materials. 4 0 5 2. 0 972 0 16 the inside bend radius changes to 0 155.

If you re working with 304 stainless steel multiply its median percentage value 21 percent by the die opening. Supplying 3d models without considering these factors increases the. Determine your minimum bend by measuring the distance from your closest feature i e. Next subtract 1 from that answer.

Choose a bend radius that matches your minimum bend. 5 1 4. The inside bend radius should be equal to the thickness of the material that you re forming. 2 5 material thickness bend radius.

In order to develop the flat pattern we add 457 to 1 625 and 2 625 to arrive at 4 707. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5 t h. If you have any questions or want to discuss your design contact us. Note that this is just a rule of thumb.

Minimum sheet metal bend radius depends on the selection of tool and the process. A cutout or the edge of your flange to your bend. Distance from outside mold line to the bottom of the cutout should be equal to the minimum flange length prescribed by the air bend force chart. 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.

The sheet metal design rule of thumb in this case is. Minimum sheet metal bending radius. If the die opening is 0 972 in. 0 551 0 16 the inside bend radius changes to 0 088.

Tabs must be at least 0 04 inches 1 mm from one another or the material s thickness whichever is. So in this case the minimum inside bend radius is 2 times the material thickness. The more ductile the sheet metal the smaller the inner bend radius is possible. Now multiply that answer by the plate thickness.