Punching

Punching in metal is a process used in metal fabrication where a punch and die are used to create holes or shapes in a metal sheet by shearing it. This method is widely used in the manufacturing and metalworking industries due to its efficiency and cost-effectiveness, particularly for high-volume production.

How Metal Punching Works:

Punch and Die Setup:

• A punch is a solid tool, typically made of hardened steel, with the shape of the desired cut or hole.
• A die is placed under the metal sheet, aligned with the punch, and it has a matching hole or cavity into which the punch forces the metal.

Process:

• The metal sheet is placed between the punch and the die.
• The punch presses down with force, shearing the metal and pushing the unwanted portion (called a slug) through the die.
• The metal around the punched area is deformed slightly due to the force, but the punch and die’s sharp edges minimize this deformation, leaving a clean cut.

Mechanical or Hydraulic Press:

• The punch is operated by a mechanical or hydraulic press that delivers the necessary force to shear the metal.
• The amount of force required depends on the thickness of the metal and the size of the hole or shape being punched.