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. Seealso hydraulic press.
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Wipo Publishes Patent of Jfe Steel for "Method of Forming Structure Having Closed Cross Section and Device for Forming Structure Having Closed Cross Section" (Japanese Inventors)
Dec 06, 2013; GENEVA, Dec. 6 -- Publication No. WO/2013/179617 was published on Dec. 5.Title of the invention: "METHOD OF FORMING STRUCTURE...