Punching Sheet Metal Thickness

Also watch out for punch deflection especially if you re working with small hole diameter to material thickness ratios.

Punching sheet metal thickness. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. You will see from our cnc punch tooling tables that we have a range of die clearances to cover sheet metal materials from 0 4mm thick up to 5 0mm thick. 82 728 kn 9 81 8 43 ton. Punch force kn 80 x 3 x 0 3447 82 728 kn convert into tonnage.

2 to 1 for stainless 1 to 1 for carbon steel 0 75 to 1 for aluminum. If punching one square hole in the 3mm thickness low carbon steel plate side length 20mm you will get. A deflecting punch requires more tonnage to break through the material and again increases distortion. The punch force required to punch a piece of sheet metal can be estimated from the following equation.

The die clearance ideally increases as thicker sheet metal is punched but in practice some standard dies can be used for a range of materials. Regardless if a shop follows some basic strategies it will be well on its way to better parts and greater throughput. Shear strength 0 3447kn mm 2. Perimeter 20 4 80mm.