Device for arc-welding ferromagnetic workpieces under the contro

Details Device for arc-welding ferromagnetic workpieces under the contro Device for arc-welding ferromagnetic workpieces under the contro

1982-04-14

1984-04-17

Reynolds, B. A.

Electric heating

Metal heating

By arc

219 60R, 219101, B23K 908

Patent

active

044436866

ABSTRACT:
Two coaxially aligned workpieces of ferromagnetic material, axially separated by a narrow peripheral gap across which a weld seam is to be formed with the aid of an arc moving along that gap, are engaged by holders including at least one set of two or more ferromagnetic gripper jaws whose confronting faces are magnetized with like polarity by respective excitation windings surrounding extensions of these jaws. The resulting magnetic field extends axially within the workpiece held by the gripper jaws in a loop which passes generally radially through the peripheral gap, either on account of a bucking magnetic field (which may be generated by a similar set of jaws gripping the other workpiece) or by virtue of pole shoes of the opposite polarity juxtaposed with the jaw extensions and approaching the gap.

REFERENCES:
patent: 3941974 (1976-03-01), Kano et al.
patent: 4273986 (1981-06-01), Edson et al.

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