BUSH HARDENING METHOD OF CATERPILLAR BAND CHAIN

PROBLEM TO BE SOLVED: To provide an effective hardening method of a bush of a caterpillar band chain in a crawler type working machine. SOLUTION: This is a hardening method of a work piece having (i) an outer surface, (ii) an inner surface forming a passage penetrating through the work piece, and (i...

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Hauptverfasser:	WOLDOW FREDRICK A, AVOND TIMOTHY G VAN DEN, POND DENNIS C, ANDERTON PETER W
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS 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 LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS MOTOR VEHICLES PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRAILERS TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an effective hardening method of a bush of a caterpillar band chain in a crawler type working machine. SOLUTION: This is a hardening method of a work piece having (i) an outer surface, (ii) an inner surface forming a passage penetrating through the work piece, and (iii) an end part. This method comprises steps of (A) inserting the work piece into a first induction coil for forming a first hardened part in the work piece, (B) inserting a second induction coil into the passage of the work piece to form a second hardened part on the work piece, and (C) mounting a third induction coil on the side of an end part of the work piece to form a third hardened part on the work piece. The step for mounting the third induction coil is executed after a step for inserting the work piece into the first induction coil, and a step for inserting the second induction coil into the passage.