PROCEDIMENTO E DISPOSITIVO PER LA FABBRICAZIONE DI ALBERI A CAMME

The invention relates to camshafts. Known camshafts are produced predominantly from solid castings on which selective hardening treatments are applied to produce the desired qualities at the bearing and cam surfaces. As this surface quality must be high, the manufacturing processes are expensive and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JANSSEN MANFRED, LIEGMANN KARL HEINZ
Format:	Patent
Sprache:	ita
Schlagworte:	BEARINGS BLASTING BRAKES CLUTCHES COMBINED OPERATIONS COUPLINGS FOR TRANSMITTING ROTATION CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ELEMENTS OR CRANKSHAFT MECHANISMS ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR OTHER WORKING OF METAL PERFORMING OPERATIONS PUNCHING METAL ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS 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 relates to camshafts. Known camshafts are produced predominantly from solid castings on which selective hardening treatments are applied to produce the desired qualities at the bearing and cam surfaces. As this surface quality must be high, the manufacturing processes are expensive and time consuming. According to the present invention, a camshaft comprises a carrier tube (4) and separate cam-forming elements and/or bearing surfaces in the form of tube portions (5) secured thereto. Securement of the tube portions (5) to the carrier tube (4) may be by soldering or welding; shrink-fitting; mechanical or hydromechanical expansion of the carrier tube (4); or hydromechanical pressing of the tube portions (5) onto the carrier tube. The invention enables the individual parts of the camshaft to be produced separately, and in different materials, reduces the subsequent treatment required to the camshaft; and results in a cost and weight saving.