High-frequency induction heating method and high-frequency inductor

The subject of the present invention is to provide a high-frequency induction heating method enabling an induction heating while holding down the temperature difference between a protruded string and a groove guide part on a surface layer part of a screw shaft. The solution of the present invention...

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Bibliographische Detailangaben
Hauptverfasser:	OKI, MITSUO, TADA, FUMIAKI, WATANABE, YASUO, SOJI, YOSHINOBU, NISHIBABA, KAZUNORI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The subject of the present invention is to provide a high-frequency induction heating method enabling an induction heating while holding down the temperature difference between a protruded string and a groove guide part on a surface layer part of a screw shaft. The solution of the present invention is to conduct electrical current in a direction of an arrow mark C on an inductor 17 equipped with induction operation parts 17a, 17b arranged in parallel at the screw shaft 1, so as to raise and keep temperature of the screw shaft 1 at a given level. A current-carrying frequency is set so that the depth of current penetration is within a range of 1/2.5 or less of the width of the protruded string in a flowing direction of the induction current, and 0.3 mm or more. Thus, shortage of heating of the protrusion 2 and overheat at corner parts are prevented and temperature fluctuation is held down.