Method for heating metal elements to be joined

Details Method for heating metal elements to be joined Method for heating metal elements to be joined

B - Operations, Transporting

23

K

327/76

B23K 11/02 (2006.01) B23K 11/093 (2006.01) B23K 13/00 (2006.01) B23K 13/04 (2006.01)

Patent

CA 1253924

Abstract of the Disclosure In a method for heating metal elements which are to be joined, for example by forge welding, a high frequency resistance heating is used. The elements are provided with surfaces to be welded and are positioned so that said surfaces constitute a narrow gap. The current is conducted from a high frequency current source through a contact into one of the elements, wherefrom the current follows the material close to the gap sur- face and to the opposite side of the element, where the current flows via further contacts and a conductor to the other element. From here the current follows the other gap surface to another contact and the current source. The current will follow a path close to the gap surfaces since these surfaces will give the path of smallest total impedance, the current thereby establish- ing a narrow and efficient heating zone in the vicinity of said gap surfaces.

498968

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