Bend Radius For Sheet Metal Rule Of Thumb

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.

Bend radius for sheet metal rule of thumb.

So in this case the minimum inside bend radius is 2 times the material thickness. Note that this is just a rule of thumb. For bends notches must be at least 3 times the material s thickness plus the bend radius. Determine your minimum bend by measuring the distance from your closest feature i e.

Here s a good rule of thumb for most materials. 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 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. Tabs must be at least 0 04 inches 1 mm from one another or the material s thickness whichever is.

Supplying 3d models without considering these factors increases the. 0 551 0 16 the inside bend radius changes to 0 088. Now multiply that answer by the plate thickness. Choose a bend radius that matches your minimum bend.

If the die opening is 0 972 in. 4 0 5 2. 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. If the material is 0 5 in.

2 5 material thickness bend radius. If you re bending 0 020 thick material use a 0 020 radius. If you re working with 304 stainless steel multiply its median percentage value 21 percent by the die opening. 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. The more ductile the sheet metal the smaller the inner bend radius is possible. Minimum sheet metal bending radius. 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. A cutout or the edge of your flange to your bend. If the die opening is 0 551 in. 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.

0 972 0 16 the inside bend radius changes to 0 155. The inside bend radius should be equal to the thickness of the material that you re forming. Usually the preferred distance between holes and a bend is 1 5 times the sheet thickness plus the bend radius 1 5 t h. Minimum sheet metal bend radius depends on the selection of tool and the process.