Hot forming system for metal workpieces

Details Hot forming system for metal workpieces Hot forming system for metal workpieces

2007-10-23

2007-10-23

Robinson, Daniel (Department: 3742)

Electric heating

Inductive heating

With heat exchange

C219S603000

Reexamination Certificate

active

11087766

ABSTRACT:
A device including at least one transformer with primer/seconder coil ratio more than one and including a control unit used to control timing and magnetute of the primer current is employed to heat a metal workpiece to be subjected a subsequent forming operation. An homopolar DC generator can also be used as current source for current heating preparing workpiece for forming operation. Subsequent heating, forming and cooling processes of the metal workpiece are carried out in a controlled manner by a central synchronization unit. This process can be applicated in hot metal bulk forging, sheet forming and hot tube blowforming.

REFERENCES:
patent: 4350861 (1982-09-01), Pouillange et al.
patent: 4761527 (1988-08-01), Mohr
patent: 4856311 (1989-08-01), Conaway
patent: 4942750 (1990-07-01), Conaway
patent: 6919545 (2005-07-01), Chen
patent: 6919547 (2005-07-01), Tsontzidis et al.
patent: 6927370 (2005-08-01), McClure et al.
patent: 6960746 (2005-11-01), Chen

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