Psi Required To Punch Through A Sheet Of Aluminum

Required tonnage for punching mild steel with tensile strength of 50 000 psi how to calculate required tonnage for punching mild steel with tensile strength of 65 000 psi how to calculate the diagonal dimension of a punch.

Psi required to punch through a sheet of aluminum.

Tonnage required for punching round holes. In general it s a good idea to drill through metal using as slow a speed as possible using a drill bit for metal. With a small twist bit 1 16 in. Multiply x 70 copper 1 2 hard.

To 3 16 in you can drill through most metals at 3 000 rpm. Multiply x 36 brass 1 4 hard. Likewise when you are trying to develop a flat pattern you will have to make a deduction from your desired part size to get the correct flat size. Multiply x 1 60 a36 steel recycled.

Tonnage in mild steel 3 1416 x diameter of hole x material thickness x 25 example. You can calculate the punching tonnage been required with the help of the following punching force calculation formula blanking force formula. As this happens you gain a small amount of total length in your part. Problem 115 what force is required to punch a 20 mm diameter hole in a plate that is 25 mm thick.

Multiply x 52 high carbon steel. Hard metals like steel and larger drill bits require even slower speeds. For round holes in steel this is diameter pi 30. Figures in the body of this chart are u s.

Shear strength n mm 2. How to obtain tonnage required for punching round holes. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched. Punching force calculation formula.

If you punch round holes or square holes or some other forms of holes through a given thickness of metal you just want to know the force required to punch a hole in steel. To calculate the force to punch holes in metal you determine the cross section in shear and multiply it by the shear strength of the metal. Sheet rb 40 000 276 80 25 astm a 36 bhn 119 159 58 80 000 1 20 20 25 45 50 carbon hr sheet bhn 200 80 000 552 1 60 25. The formula is perimeter times thickness times shear.

Multiply x 1 25 stainless steel. 3 1416 x 2 000 x 250 x 25 39 26 tons. To calculate the tons needed for other metals just multiply number times the tons required for punching mild steel. The shear strength is 350 mn m 2.