Metal deforming – By use of closed-die and coacting work-forcer – With stripping or ejecting from tool
Patent
1983-02-18
1985-03-19
Gilden, Leon
Metal deforming
By use of closed-die and coacting work-forcer
With stripping or ejecting from tool
72356, 72361, 72405, B21D 2200
Patent
active
045051445
ABSTRACT:
An apparatus for working both ends of a workpiece at a time. The workpiece, typically in the form of a bar or a tube, is successively shaped by pre-shaping die means, shaping die means and finish-shaping die means, each of which comprises a pair of dies for simultaneously working both ends of the workpiece to a predetermined configuration. The dies in each pair are movable toward and away from the both ends of the workpiece, respectively, in accordance with the operation of a pair of hydraulic devices. A pair of knockout rods respectively slidably received in cylinders of the hydraulic devices cooperate to support the workpiece while the latter is progressively shaped. One of the knockout rods is fixed to one of the dies while the other knockout rod is held afloat relative to the other die by a hydraulic device, so that the workpiece is allowed to stretch to a full available length only at one end thereof on the afloat knockout rod side.
REFERENCES:
patent: 3188849 (1965-06-01), Wisebaker et al.
patent: 3588933 (1971-06-01), Shinopulous
patent: 3783670 (1974-01-01), Nickrawietz
patent: 3797429 (1974-03-01), Wolfe
Maki Toshio
Nihei Tetsuo
Sakuma Kazuyoshi
Gilden Leon
Honda Giken Kogyo Kabushiki Kaisha
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