punch press

punch press
a power-driven machine used to cut, draw, or otherwise shape material, esp. metal sheets, with dies, under pressure or by heavy blows.
[1910-15]

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Machine tool that changes the size or shape of a piece of material, usually sheet metal, by applying pressure to a die in which the workpiece is held.

The form and construction of the die determine the shape produced on the workpiece. A punch press has two components: the punch, which is attached to the reciprocating (back and forth, or up and down) ram (plunger) of the machine; and the die, which is clamped onto a bed or anvil whose flat surface is perpendicular to the path of the ram. The punch pushes against the workpiece, which is held in the die. Punch presses are usually driven by electric motors. See also hydraulic press.

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      machine that changes the size or shape of a piece of material, usually sheet metal, by applying pressure to a die in which the workpiece is held. The form and construction of the die determine the shape produced on the workpiece.

      A punch press has two coacting components: the punch, which is attached to the reciprocating ram of the machine, and the die, which is clamped onto a bed or anvil whose flat surface is perpendicular to the path of the ram. In operation, the punch pushes against the workpiece, which is held in the die. A blanking die shears out a slug of sheet metal to make it into a blank that will fit dies for subsequent punch-press operations. These include forming or bending and drawing, in which cup-shaped articles are produced by a process that entails some plastic flow of the metal.

      Punch presses are usually driven by electric motors, and conversion from the rotary motion of the drive shaft to reciprocation of the ram is effected by either a crank, a toggle, or a cam mechanism. Because the power demands are intermittent, a flywheel is attached to the drive shaft to store energy during the idling period between strokes of the ram and to deliver energy to the shaft during a punching operation, thus reducing the required capacity of the driving motor. See also hydraulic press.

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Universalium. 2010.

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Look at other dictionaries:

  • punch press — Punch Punch, v. t. [imp. & p. p. {Punched}; p. pr. & vb. n. {Punching}.] [From {Punch}, n., a tool; cf. F. poin[,c]onner.] To perforate or stamp with an instrument by pressure, or a blow; as, to punch a hole; to punch ticket. [1913 Webster]… …   The Collaborative International Dictionary of English

  • Punch press — Punch Punch, n. [Abbrev. fr. puncheon.] 1. A tool, usually of steel, variously shaped at one end for different uses, and either solid, for stamping or for perforating holes in metallic plates and other substances, or hollow and sharpedged, for… …   The Collaborative International Dictionary of English

  • punch press — n. a press in which dies are fitted for cutting, shaping, or stamping metal …   English World dictionary

  • Punch press — Punch press. См. Штамповочный пресс. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • punch press — punch′ press n. mac a power driven machine used to cut, draw, or shape material, as metal sheets, with dies • Etymology: 1910–15 …   From formal English to slang

  • 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.… …   Wikipedia

  • punch press — noun a power driven press used to shape metal parts • Hypernyms: ↑press, ↑mechanical press • Hyponyms: ↑bench press * * * noun also punching press : a press for working on metal or other materials by the u …   Useful english dictionary

  • punch press — noun Date: 1911 a press equipped with cutting, shaping, or combination dies for working on material (as metal) …   New Collegiate Dictionary

  • Punch press — Штамповальный пресс; Дыропробивной пресс …   Краткий толковый словарь по полиграфии

  • punch press — machine power tool used metalworking and for punching holes in metal …   English contemporary dictionary

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