Strength Required To Punch Through A Sheet Of Aluminum

The formula is perimeter times thickness times shear.

Strength required to punch through a sheet of aluminum.

Thirty tons being the approximate shear strength of mild steel plus an allowance for friction. 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. Punching is a forming process that uses a punch press to force a tool called a punch through the workpiece to create a hole via shearing punching is applicable to a wide variety of materials that come in sheet form including sheet metal paper vulcanized fibre and some forms of plastic sheet. Punching force calculation formula.

Material factor aluminum 3003 h14 30 aluminum 5052 h32 38 aluminum 6061 t6 50 copper 57 brass 260 hh 70 mild steel 1 00 cold drawn steel 1 20 stainless steel 304 1 40 tempered spring steel 4 00. Tonnage required for punching round holes figures in the body of this chart are u s. What size portable hole punch or hydraulic ironworker machine is needed for punching a hole size. 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.

You can calculate the punching tonnage been required with the help of the following punching force calculation formula blanking force formula. Material factor the higher the shear strength of the material the higher the tonnage required. Tons of pressure required hole size x material thickness x constant 80. The shear strength is 350 mn m 2.

For round holes in steel this is diameter pi 30. Strength of materials chapter 01 simple stresses shear stress solution to problem 115 shear stress. This chart shows the tons of force required for punching a single round hole in mild steel derived by the 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.