Electric induction heat treatment of an end of tubular material
AssigneeInductoheat, Inc.
InventorsDon L. Loveless, Peter A. Ross, Valery I. Rudnev, John Paul Lang
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Abstract
A magnetic flux concentrator is used to control the end heating of a tubular material in an electric induction heat treatment process. The magnetic flux concentrator may consist of fixed elements, or a combination of fixed and moveable elements to accommodate end heating of tubular materials having different dimensions or material properties.
Claims20
An end of tube flux concentrator for induction heat treatment of an end of a tube inserted within a solenoidal induction coil, the end of tube flux concentrator comprising:
- a disc base;
- a plurality of peripheral poles radially distributed around the perimeter of the disc base, each of the plurality of peripheral poles extending generally perpendicularly from a tube-facing side of the disc base to an extended peripheral pole end, the plurality of peripheral poles arranged relative to the tube-facing side of the disc base so that when the disc base is brought into the vicinity of the end of the tube inserted within the solenoidal induction coil the plurality of peripheral poles at least partially surround the exterior of the solenoidal induction coil.
An end of tube flux concentrator comprising a plurality of base legs, each of the plurality of base legs extending from a converging end substantially perpendicular to the longitudinal axis of the flux concentrator;
- a wedge element extending generally perpendicular from a tube-facing side of the converging end of at least one of the plurality of base legs to collectively form a central pole;
- a peripheral pole extending generally perpendicular from the tube-facing side of the end of at least one of the plurality of base legs opposite the converging end of the at least one of the plurality of base legs.
Dependencies are inferred from the claim text.