High-frequency induction heating device

Abstract

The invention provides a high-frequency induction heating device which can simply and continuously carry out quenching and annealing on a workpiece on a heating device and feasibly carry out quenching and annealing with specified conditions so as to easily and stably obtain a workpiece with favorable quenching and annealing quality. The high-frequency induction heating device comprises a heating coil, a high-frequency power supply, a cooling device, a mark endowing device and a control device. The control device is characterized by providing high-frequency currents for quenching to the heating coil from the high frequency power supply, carrying out quenching on a quenching part of the workpiece, providing high frequency currents for annealing to the heating coil from the high frequency power supply after quenching, carrying out annealing on an annealing part of the workpiece, and then running the mark endowing device after the annealing of the workpiece so as to endow a prescriptive mark to a non-quenching and non-annealing part of the workpiece. The high-frequency power supply is equipped with a first power supply part which can provide the high frequency currents for the quenching to the heating coil and a second power supply part which can provide the high frequency currents for the annealing to the heating coil.

Description

technical field [0001] The present invention relates to a high-frequency induction heating device capable of performing quenching and annealing of various workpieces simply and continuously by high-frequency induction heating with one heating device. Background technique [0002] In general, when quenching or annealing a specified part of the outer peripheral surface of a shaft-shaped workpiece such as a gear shaft, high-frequency induction heating is used in which eddy currents are induced by high-frequency current at a specified frequency to induce heating at the specified position. device. Hitherto, such a high-frequency induction heating device includes a heating coil, a cooling device, a high-frequency power source capable of generating a high-frequency current of a predetermined frequency suitable for quenching or annealing, and the like. [0003] Then, when quenching is performed, a high-frequency current for quenching is supplied from the heating device to the heati...

AI Technical Summary

Problems solved by technology

[0005] However, on such a high-frequency induction heating device, the conditions for quenching and annealing of the workpiece are different, and heating devices with high-frequency power supplies with different frequencies are used respectively. It is difficult to simply and continuously quench and anneal the workpiece, and the work efficiency is poor.

[0006] In addition, once the workpiece quenched by the quenching heating device is taken out from the heating device, it must be installed on the annealing heating device installed at another location for annealing. Therefore, when the workpiece is moved between the heating devices, quenching may occur. Defective workpieces or workpieces that have not been quenched are supplied to the heating device for annealing for annealing. In this way, it is difficult to ensure that the workpiece is quenched under the specified conditions and then annealed under the specified conditions, and it is also difficult to easily and stably heat the workpiece on the workpiece. to obtain good quenching and annealing quality

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