Induction welding of tubing with multiple induction coils

Details Induction welding of tubing with multiple induction coils Induction welding of tubing with multiple induction coils

B - Operations, Transporting

23

K

B23K 13/01 (2006.01) B23K 13/02 (2006.01) H05B 6/02 (2006.01) H05B 6/40 (2006.01) H05B 6/42 (2006.01) H05B 6/44 (2006.01)

Patent

CA 2222474

A method and apparatus in which edge portions of metal parts (1), the edge portions being disposed with opposed surfaces (3, 4), are heated by high frequency electrical currents as the edge portions are advanced and brought together at a weld point (5). The electrical currents are induced in the edge portions in advance of the weld point (5) by two induction coils (6, 7), one at one side of the metal parts (1) and the other at the other side of the metal parts (1), disposed and energized from a high frequency electrical source so that the electrical currents at the opposed surfaces flow in opposite directions at any given time and the currents induced by one coil (6) add to the currents induced by the other coil (7).

L'invention concerne un appareil et un procédé dans lesquels des portions de bordure d'éléments métalliques (1), présentant des surfaces opposées (3, 4), sont chauffées par des courants électriques hautes fréquences, à mesure que les portions de bordure sont avancées et réunies au point de soudage (5). Les courants électriques sont induits dans les portions de bordure en amont du point de soudage (5) par deux bobines d'induction (6, 7), une sur un côté des éléments métalliques (1) et l'autre sur l'autre côté des éléments métalliques (1). Ces bobines sont disposées et alimentées en courant hautes fréquences de manière que les courants électriques des surfaces opposées circulant constamment dans des directions opposées, et que les courants induits par une bobine (6) s'ajoutent aux courants induits par l'autre bobine (7).

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