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Wire drawing is a metalworking process used to reduce the cross-section of a wire by pulling the wire through one or more dies. There are many applications for wire drawing, including electrical wiring, cables, tension-loaded structural components, springs, paper clips, spokes for wheels, and stringed musical instruments.
The firm grew rapidly through the 1840s expanding its range to include flour machines and other agricultural products and by 1848 there were 80 employees. What propelled the firm to a different level was the development of the electric telegraph, which required huge quantities of wire. In 1850 the first undersea cable laid across Channel and ...
Drawing is classified into two types: sheet metal drawing and wire, bar, and tube drawing. Sheet metal drawing is defined as a plastic deformation over a curved axis. For wire, bar, and tube drawing, the starting stock is drawn through a die to reduce its diameter and increase its length.
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Rods and bars were either sold, or rods were used to make wires up to 0.0056 inches thin. The wire train started with nine 8 and 10-die tandem drawing machines, followed if desired by one 13-die machine, followed if desired by one of twenty up-to-16-dies machines for the finest wire. Intermediate anneals as necessary.
The machine is capable of planning the drill procedure, optimizing its electric power usage, changing drill bits and automatically returning to a charging station when necessary. In addition to the potential for higher productivity, workplace safety is an area where this kind of technology may bring significant improvements.
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This must be done because drawing wire hardens it, which causes the wire to become brittle. Brittle wire that has not been annealed may snap during the drawing process (or develop microscopic or macroscopic cracks, which may weaken the piece or "grow" with further working). With a mandrel, a draw plate can be used to draw tubes of metal. Plates ...
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