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Press′ure-forg′ing.

A method of forging and swaging metals by hydraulic pressure. At the State Railway Works, Vienna, two presses capable of giving respectively 1,500 and 600 tons pressure are employed. Heated ingots of Bessemer steel, weighing 2,030 pounds, are placed under a hammer-like head attached to the piston and gradually squeezed into the form of bars, being shifted and turned as required when the piston is raised. The bar is then cut into lengths by a chisel attached to a press. The masses thus cut off are swaged to the desired form in molds by suitable dies attached to the piston. There is no jar or vibration in this machine, as in the steam hammer, and it is very expeditious in its operation, rendering it well adapted for complicated forgings, such as locomotive cross-heads, boiler-heads, steam-domes, etc., and also for spokes. See also forging-press.

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Vienna (Wien, Austria) (1)

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Henry Bessemer (1)
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