PROCEDE DE FABRICATION DE PIECE TUBULAIRE METALLIQUE ET D'ARBRE TUBULAIRE COMPOSITE

The invention concerns firstly a method for making tubular metal parts (10) with cylindrical shape by plastic deformation. Said method is characterised in that it consists in: inserting in a tubular blank (20) a cylindrical mandrel (30) comprising over only a fraction of its length, one or several a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	VALIN DANIEL
Format:	Patent
Sprache:	fre
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING COMBINED OPERATIONS CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR OTHER WORKING OF METAL PERFORMING OPERATIONS PUNCHING METAL STEAM ENGINES THERMAL INSULATION IN GENERAL TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	The invention concerns firstly a method for making tubular metal parts (10) with cylindrical shape by plastic deformation. Said method is characterised in that it consists in: inserting in a tubular blank (20) a cylindrical mandrel (30) comprising over only a fraction of its length, one or several alignment grooves (32) of predetermined orientation for example arranged ring-shaped; performing a spinning operation on the mandrel (30) so as to imprint the blank metal (52) in the mandrel grooves; extracting the mandrel (30), which causes the deformed blank (50) to swell perpendicular to the metal imprinted zones (50). Said method can be used to produce composite tubular shafts, for example, composite camshafts (200) by integrating in the tubular parts (210) directly mounted parts provided with an axial hole (251) such as cams (250), bearing rings and the like. The directly mounted parts (250) can be integrated in the tubular parts by crimping threading them between the steps of spinning and extracting the mandrel, the swelling which is generated when the mandrel is extracted thereby enabling the directly mounted parts to be crimped. The directly mounted parts can be integrated in the tubular parts by clamp fitting, the zones swollen (62) when the mandrel is extracted being calibrated to enable said clamp fitting.