Induction heating coil and induction heating method
AssigneeNeturen Co., Ltd.
InventorsHirokazu Inaba, Yutaka Kiyosawa
Life of this patent
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Abstract
To heat a workpiece having a recess portion provided along a longitudinal axis of the workpiece, the workpiece is inserted into an induction heating coil, and the induction heating coil or the workpiece is along an axial direction of the workpiece. The induction heating coil has a conductor configured to surround the workpiece around the axis of the workpiece. The conductor has a protruding portion protruding inwardly to face the recess portion of the workpiece.
Claims13
An induction heating coil configured to heat a workpiece having a recess portion provided along a longitudinal axis of the workpiece, the induction heating coil comprising a conductor configured to surround the workpiece around the axis of the workpiece, wherein the conductor comprises a protruding portion protruding inwardly to face the recess portion of the workpiece,
- wherein the conductor has a size that allows the conductor to surround the workpiece in a state in which the protruding portion is not placed in the recess portion of the workpiece.
An induction heating coil configured to heat a workpiece having a recess portion provided along a longitudinal axis of the workpiece, the induction heating coil comprising a conductor configured to surround the workpiece around the axis of the workpiece, wherein the conductor comprises a protruding portion protruding inwardly to face the recess portion of the workpiece, wherein the conductor comprises:
- a first conductor comprising surrounding portions configured to surround the workpiece around the axis of the workpiece, the surrounding portions being arranged coaxially with a space provided between the surrounding portions and being coupled to each other, and
- a second conductor comprising the protruding portion and arranged between the surrounding portions such that electric current flowing in the surrounding portions causes induced electric current to flow in the second conductor,
- wherein the second conductor is moveable relative to the first conductor.
An induction heating method for heating a workpiece having a recess portion provided along a longitudinal axis of the workpiece, the method comprising:
- inserting the workpiece into an induction heating coil having a conductor configured to surround the workpiece around the axis of the workpiece, wherein the conductor has a protruding portion protruding inwardly to face the recess portion of the workpiece;
- and
- moving one of the induction heating coil and the workpiece along an axial direction of the workpiece,
- wherein the conductor has a size that allows the conductor to surround the workpiece in a state in which the protruding portion is not placed in the recess portion of the workpiece.
An induction heating method for heating a workpiece having a recess portion provided along a longitudinal axis of the workpiece, the method comprising:
- inserting the workpiece into an induction heating coil having a conductor configured to surround the workpiece around the axis of the workpiece, wherein the conductor has a protruding portion protruding inwardly to face the recess portion of the workpiece;
- and
- moving one of the induction heating coil and the workpiece along an axial direction of the workpiece,
- wherein the conductor comprises:
- a first conductor comprising surrounding portions configured to surround the workpiece around the axis of the workpiece, the surrounding portions being arranged coaxially with a space provided between the surrounding portions and being coupled to each other, and
- a second conductor comprising the protruding portion and arranged between the surrounding portions such that electric current flowing in the surrounding portions causes induced electric current to flow in the second conductor,
- wherein the second conductor is moveable relative to the first conductor.
Dependencies are inferred from the claim text.