Bend Radius For Sheet Metal Rule Of Thumb

If the material is 0 5 in.

Bend radius for sheet metal rule of thumb.

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 inside bend radius should be equal to the thickness of the material that you re forming. 0 551 0 16 the inside bend radius changes to 0 088. Determine your minimum bend by measuring the distance from your closest feature i e.

4 0 5 2. Now multiply that answer by the plate thickness. When we calculate the bend allowance we find that it equals 457. Choose a bend radius that matches your minimum bend.

0 972 0 16 the inside bend radius changes to 0 155. In order to develop the flat pattern we add 457 to 1 625 and 2 625 to arrive at 4 707. Minimum sheet metal bending radius. Tabs must be at least 0 04 inches 1 mm from one another or the material s thickness whichever is.

If the die opening is 0 551 in. If you re working with 304 stainless steel multiply its median percentage value 21 percent by the die opening. 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. Note that this is just a rule of thumb.

So in this case the minimum inside bend radius is 2 times the material thickness. 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. A cutout or the edge of your flange to your bend. Minimum sheet metal bend radius depends on the selection of tool and the process.

If the die opening is 0 972 in. If you have any questions or want to discuss your design contact us. Next subtract 1 from that answer. However it is important to know that this is just a broadly applicable rule of thumb you can follow for making bends in steel.

Here s a good rule of thumb for most materials. Supplying 3d models without considering these factors increases the. The more ductile the sheet metal the smaller the inner bend radius is possible. In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend.

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 re bending 0 020 thick material use a 0 020 radius. For bends notches must be at least 3 times the material s thickness plus the bend 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.