Multi-frequency heat treatment of a workpiece by induction heating

An apparatus and process are provided for multi-frequency induction heat treatment of workpieces (14) including gears. High frequency power is applied to an induction coil (12) that surrounds the workpiece (14) so that a high frequency magnetic field couples with the workpiece (14) to inductively he...

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Bibliographische Detailangaben
1. Verfasser:	LOVELESS DON L.,RUDNEV VALERY L
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDUCTANCES MACHINE TOOLS MAGNETS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SOLDERING OR UNSOLDERING TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSFORMERS TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	An apparatus and process are provided for multi-frequency induction heat treatment of workpieces (14) including gears. High frequency power is applied to an induction coil (12) that surrounds the workpiece (14) so that a high frequency magnetic field couples with the workpiece (14) to inductively heat the workpiece. A C-core inductor (16a-b) is coupled to a coil (18) that has low frequency power applied to it. The workpiece (14) is inserted in a gap in the C-core inductor magnetic circuit so that it experiences low frequency Joule effect heating when the low frequency current is applied to the coil (18) coupled with the C-core inductor. Alternatively the workpiece may be inserted around the C-core inductor (16a-b) when the workpiece has an opening.