Psi Required To Punch Through A Sheet Of Aluminum

Multiply x 52 high carbon steel.

Psi required to punch through a sheet of aluminum.

Multiply x 36 brass 1 4 hard. Punching force calculation formula. 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. When the sheet metal is put through the process of bending the metal around the bend is deformed and stretched.

Multiply x 1 60 a36 steel recycled. Shear strength n mm 2. You can calculate the punching tonnage been required with the help of the following punching force calculation formula blanking force formula. 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.

Tons 2000 lbs required to punch round holes in mild carbon steel having a shear strength of 60 000 psi subject to the multiplier from table above of 75 to 1 3 according to the state of the metal whether annealed or work hardened. To calculate the tons needed for other metals just multiply number times the tons required for punching mild steel. How to obtain tonnage required for punching round holes. Figures in the body of this chart are u s.

With a small twist bit 1 16 in. Multiply x 70 copper 1 2 hard. 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. Hard metals like steel and larger drill bits require even slower speeds.

The shear strength is 350 mn m 2. 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. 3 1416 x 2 000 x 250 x 25 39 26 tons. Thirty tons being the approximate shear strength of mild steel plus an allowance for friction.

In general it s a good idea to drill through metal using as slow a speed as possible using a drill bit for metal. For round holes in steel this is diameter pi 30. Multiply x 1 25 stainless steel. As this happens you gain a small amount of total length in your part.

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. Problem 115 what force is required to punch a 20 mm diameter hole in a plate that is 25 mm thick. Tonnage in mild steel 3 1416 x diameter of hole x material thickness x 25 example. Recommended die clearance in of thickness low carbon hr steel rb 70 50 000 345 1 00 20 low carbon c r.