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2. Punching machine - Wikipedia

   en.wikipedia.org/wiki/Punching_Machine

   A punching machine is a machine tool for punching and embossing flat sheet-materials to produce form-features needed as mechanical element and/or to extend static stability of a sheet section. According to the file, Richard Walsh, the county of Grayson, and the State of Texas had invented and applied for US patent in 1894.

3. Punch press - Wikipedia

   en.wikipedia.org/wiki/Punch_press

   A punch press is a type of machine press used to cut holes in material. It can be small and manually operated and hold one simple die set, or be very large, CNC operated, with a multi-station turret and hold a much larger and complex die set.

4. Knockout punch - Wikipedia

   en.wikipedia.org/wiki/Knockout_punch

   The screw is then threaded into the punch and the screw tightened until the punch is drawn completely through the sheet metal. [2] The manual system uses a screw that has a standard hex head or square head and is driven using an allen key or wrench. A manual knockout punch can handle holes from 0.5 to 1.25 in (13 to 32 mm).

5. Hole punch - Wikipedia

   en.wikipedia.org/wiki/Hole_punch

   A related office tool is the eyelet punch. This is a single-hole punch which also crimps a metal fastening loop around the hole, similar to a rivet. It is used to permanently secure a few sheets of paper together. A similar tool, generally known as a holing pincer, is used in animal husbandry.

6. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   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. The punch often passes through the work into a ...

7. Ironworker (machine) - Wikipedia

   en.wikipedia.org/wiki/Ironworker_(machine)

   This particular machine stands over 6 ft (1.8 m) tall and can shear, notch, and punch precision holes in plate steel up to 5/8 in (15 mm) thick. An Ironworker is a class of machine that can shear, notch, and punch holes in steel plate and profiles. Ironworkers generate force using mechanical advantage or hydraulic systems. [1]