Bend Radius For Sheet Metal Rule Of Thumb

Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5 t h.

Bend radius for sheet metal rule of thumb.

Note that this is just a rule of thumb. If the material is 0 5 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. 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.

5 1 4. 0 972 0 16 the inside bend radius changes to 0 155. Minimum sheet metal bending radius. Choose a bend radius that matches your minimum bend.

If you re bending 0 020 thick material use a 0 020 radius. However it is important to know that this is just a broadly applicable rule of thumb you can follow for making bends in steel. So in this case the minimum inside bend radius is 2 times the material thickness. 0 551 0 16 the inside bend radius changes to 0 088.

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. The sheet metal design rule of thumb in this case is. Supplying 3d models without considering these factors increases the. If you have any questions or want to discuss your design contact us.

The more ductile the sheet metal the smaller the inner bend radius is possible. A cutout or the edge of your flange to your bend. If the die opening is 0 972 in. If the die opening is 0 551 in.

Determine your minimum bend by measuring the distance from your closest feature i e. 4 0 5 2. When we calculate the bend allowance we find that it equals 457. 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.

In order to develop the flat pattern we add 457 to 1 625 and 2 625 to arrive at 4 707. Next subtract 1 from that answer. Tabs must be at least 0 04 inches 1 mm from one another or the material s thickness whichever is. Minimum sheet metal bend radius depends on the selection of tool and the process.

The inside bend radius should be equal to the thickness of the material that you re forming. 2 5 material thickness bend radius. For bends notches must be at least 3 times the material s thickness plus the bend radius. Now multiply that answer by the plate thickness.