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Metal Fabrication Processes - Punching, Punch Press, Hole Punching, Keyhole Punching
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Punching is a metal fabricating process that removes a scrap slug from the metal workpiece each time a punch enters the punching die. This process leaves a hole in the metal workpiece. The punching operation is carried out in a punch press or turret punch press sometimes called a press brake.
Characteristics of the punching process include:
Its ability to produce economical holes in both strip and sheet metal during medium or high production processes.
The ability to produce holes of varying shapes - quickly.
The punching process forces a steel punch, made of hardened steel, into and through a workpiece. The punch diameter determines the size of the hole created in the workpiece.
Punched material is most normally in sheets. Roll material can also be punched.
CNC punching machines are able to punch holes in sheet products very quickly and have the ability to change punches during the operation to punch different shaped holes in the one set up. CNC punching machines with laser cutting heads are also available to combine both processes in the one machine.
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