Electrical upsetting method and device therefor

Details Electrical upsetting method and device therefor Electrical upsetting method and device therefor

1981-11-18

1984-11-27

Combs, E. Michael

Metal deforming

With exposure of work to gas, vapor, mist, or modified...

72342, 72354, 72364, B21D 2200, B21D 3100, B21J 508

Patent

active

044844646

ABSTRACT:
An electrical upsetting method for upsetting a cylindrical metal material, which is durable against wear and tear due to high temperature as well as vigorous friction under heavy pressure during the upsetting work, wherein a space gap is provided between the outer peripheral surface of the workpiece and the inner peripheral surface of the shaping die to prevent the die from direct heat from the workpiece generated by electric conduction across the electrodes, or wherein a space gap is provided between the outer peripheral surface of the anvil electrode and the inner peripheral surface of the shaping die, and an inert gas is filled in the space gap to protect the die from oxidation due to its exposure to the external atmosphere, or air, as well as to maintain the die in a cooled condition by the inert gas.
The present invention also proposes an improved electrical upsetting device provided with the inert gas feeding device which supplies such inert gas through the communicating grooves into the space gap defined between the anvil electrode and the shaping die to prevent the die from wear and tear due to its oxidation through exposure to the external atmosphere, thereby securing long service life of the shaping die.

REFERENCES:
patent: 3120769 (1964-02-01), Hatebur
patent: 3209453 (1965-10-01), Bertoglio et al.
patent: 3289229 (1966-12-01), Friedman
patent: 3487196 (1969-12-01), Bachmann
patent: 3808865 (1974-05-01), Wagner et al.

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