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  2. 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.

  3. Punching - Wikipedia

    en.wikipedia.org/wiki/Punching

    Die and punch shapes affect the force during the punching process. The punch force increases during the process as the entire thickness of the material is sheared at once. A beveled punch helps in the shearing of thicker materials by reducing the force at the beginning of the stroke. However, beveling a punch will distort the shape because of ...

  4. Punch (tool) - Wikipedia

    en.wikipedia.org/wiki/Punch_(tool)

    A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other. When used, the narrower end is pointed against a target surface and the broad end is struck with a hammer or mallet , causing the blunt force of the blow to be ...

  5. Automatic center punch - Wikipedia

    en.wikipedia.org/wiki/Automatic_center_punch

    When the body is pressed to the trip point, a taper in the body forces the block sideways until the hole in the block is aligned with the hole through the hammer, and the hammer is released to strike the punch. This mechanism is used in heavy duty punches as it is less likely to bind on reset than the Sweet mechanism, it doesn't tend to wear ...

  6. Punching machine - Wikipedia

    en.wikipedia.org/wiki/Punching_Machine

    A HACO CNC punching machine Punched hole: best results for cutting surface with above 70% cutting, low clearance necessary (8% material thickness) Punch presses are developed for high flexibility and efficient processing of metal stampings. The main areas of application are for small and medium runs.

  7. Hole punching - Wikipedia

    en.wikipedia.org/wiki/Hole_punching

    Hole punching may refer to: Hole punch, an office tool used to create holes in sheets of paper; Punch (tool), a hard metal rod with a narrow tip which can be used for forming holes; Hole punching (networking), a technique in computer networking to establish a connection between two parties behind firewalls