Method of making a welded can body

Details Method of making a welded can body Method of making a welded can body

1985-11-25

1987-03-24

Goldberg, E. A.

Electric heating

Metal heating

Of cylinders

219 83, 219 84, B23K 1106

Patent

active

046527150

ABSTRACT:
A method of making a welded can body wherein the opposite marginal edge portions of a metallic blank are overlapped to form a can body preform with an overlapped portion, and then the overlapped portion is electric-resistance mash-seam welded by using a pair of wire electrodes abutting on both the surfaces of the overlapped portion. At least one of the pair of the wire electrodes is formed with a flat main portion and a marginal projection including a slope contiguous to the flat main portion on the surface thereof, which surface is adapted to abut on the surface of the overlapped portion. The overlapped portion of the can body preform is fed in between the pair of wire electrodes such that the edge face of one of the marginal edge portions may be positioned on an area of the flat main surface portion in the vicinity of the slope or be positioned on the slope, allowing the marginal edge beside the edge face to flow outwardly in the circumferential direction of the can body preform along the slope during the welding.

REFERENCES:
patent: 3596043 (1971-07-01), Sporri
patent: 4160892 (1979-07-01), Opprecht et al.
patent: 4409456 (1983-10-01), Kitamura et al.

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