MANUFACTURE OF SUSPENDING ANTICORROSIVE SPRING

PURPOSE:To provide a manufacture method for suspending anticorrosive spring without lowering the strength by preventing pitting resulting in start of breakage of the spring from producing and also preventing delayed breakage from occurring. CONSTITUTION:In a manufacture method for suspension spring...

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Bibliographische Detailangaben
Hauptverfasser:	MITSUYOSHI YASUHIKO, KOYAHARA HIDEO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR BLASTING CHEMISTRY COMBINED OPERATIONS ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MACHINE TOOLS MEANS FOR DAMPING VIBRATION MEASURING MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SHOCK-ABSORBERS SPRINGS TESTING THERMAL INSULATION IN GENERAL TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To provide a manufacture method for suspending anticorrosive spring without lowering the strength by preventing pitting resulting in start of breakage of the spring from producing and also preventing delayed breakage from occurring. CONSTITUTION:In a manufacture method for suspension spring which passes through a series of processes such as soaking, hot forming, quenching, annealing shot peening, chemical conversion treatment, painting, etc., or cold forming, soaking, quenching, annealing, shot peening, chemical conversion treatment, painting, etc., cadmium is electrically plated at least on a part of the surface of a spring formed material after shot peening, and then the spring is painted and baked for hardening. By this, a suspension spring free from delayed breakage can be produced. Also, by repairable corrosive action of cadmium, pitting resulting in start of corrosive fatigue and breakage in salt damage environment can be prevented from producing.