punch

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Related to punching: punching shear, punching bags

punch

(pŭnch),
An instrument for making a hole or indentation in some solid material or for driving out a foreign body in such material.
[L. pungo, pp. punctus, to stick, to punch]

punch

An instrument for making a small circular hole in material or tissue, esp. the skin.

punch

a metal, rodlike instrument with one pointed or cavitied end and one propulsion end to be pushed hard with the palm of the hand or driven with a hammer in order to drive a hole or to excise a small round piece of tissue.

punch biopsy
a circular piece of skin excised by a hand driven biopsy punch. See also keyes punch.
dental punch
has a slight cavity at the end so that the tooth to be driven will seat into the end and not slip off.
punch graft
see punch graft.
References in periodicals archive ?
We tried both tools side-by-side in the machine, both punching 0.
Williams also reports that overall punching results using the Marathon tooling were equally effective.
However, punching difficult materials can challenge any press and pose special problems.
The Marathon punching system, for example, is fully guided, uses high-speed steel punches, and spring-loaded steel strippers.
Punching tools for the punching of elastomeric articles must be constructed in accordance with the highest level of precision.
The designing of the punching tool also includes the defining of the diameters of the holes in the bottom die for the positioning of the pads.
To determine shrinkage precisely for the fabrication of injection molds and punching tools for volume production, samples produced by injection molding must be measured.
About midway in the punching sequence, the sheet is passed to the second motion system, which handles it for the remainder of the punching.
The Libra features a new type of tool handling and punching mechanism.
The Libra's punching pattern is much faster than that of a turret press.
The process begins when the system takes a mill size sheet from the sheet-storage tower and delivers it to the S4 punching unit with integral right-angle shear.