Method and apparatus of induction heating a metallic elongated m

Details Method and apparatus of induction heating a metallic elongated m Method and apparatus of induction heating a metallic elongated m

1982-01-20

1984-04-10

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219 1057, 219 1071, 219 1077, 219 1079, H05B 606, H05B 640

Patent

active

044423314

ABSTRACT:
The present invention relates to a method of uniformly induction heating a metallic elongated material having different thickness sections seen in the longitudinal direction, and more particularly relates to a method of ensuring substantially uniform heating for a metallic elongated material over the whole length thereof irrespective of the existence of different thickness of diameter section(s). Specifically, an inductor for practicing the method of the invention is constructed in the form of a multi-turn coil which is adapted to be separated to a certain number of coil segments corresponding to the geometrical configuration of the metallic elongated material. Uniform distribution of temperature over the metallic elongated material is achieved by properly program controlling power supply to the respective turns of the coil and thereby controlling a heating time thereof, while the inductor itself is maintained as fixed. Thus, irrespective of the irregular stepped configuration of the metallic elongated material substantially uniform heating is ensured by preparing an adequate program corresponding to it.

REFERENCES:
patent: 1981631 (1934-11-01), Northrup
patent: 2452197 (1948-10-01), Kennedy
patent: 2752472 (1956-06-01), Emerson
patent: 3827275 (1974-08-01), Suttan et al.
patent: 4093839 (1978-06-01), Moliterno et al.
patent: 4100387 (1978-07-01), Reinke et al.
patent: 4142663 (1979-03-01), Blatnik et al.
patent: 4317978 (1982-03-01), Nebesar

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