WO2004089574A1 - Variable drive for a camshaft - Google Patents

Variable drive for a camshaft Download PDF

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Publication number
WO2004089574A1
WO2004089574A1 PCT/EP2004/003524 EP2004003524W WO2004089574A1 WO 2004089574 A1 WO2004089574 A1 WO 2004089574A1 EP 2004003524 W EP2004003524 W EP 2004003524W WO 2004089574 A1 WO2004089574 A1 WO 2004089574A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
extruded
blank
rotor
continuously cast
Prior art date
Application number
PCT/EP2004/003524
Other languages
German (de)
French (fr)
Inventor
Kai Lehmann
Jens-Uwe Plank
Jörg RÖSENER
Holger Rudzinski
Original Assignee
Daimlerchrysler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102004011659A external-priority patent/DE102004011659A1/en
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Priority to JP2006504972A priority Critical patent/JP2006524574A/en
Publication of WO2004089574A1 publication Critical patent/WO2004089574A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
    • B23P13/04—Making metal objects by operations essentially involving machining but not covered by a single other subclass involving slicing of profiled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/14—Making other products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the invention relates to a method for producing a component for motor vehicles from a continuous casting or extrusion of a metal alloy.
  • valve drive of a motor vehicle is known, the rotor and housing of which are made from an extruded aluminum alloy.
  • the pressing is cut to the desired length and then processed in a cutting and polishing process.
  • the invention is based on the object of designing and arranging a production method in such a way that rapid and cost-effective production is ensured.
  • the object is achieved in that a component blank is produced by dividing the extruded part or profile or the extruded part or profile and the component blank is cut to the required dimension in a forming process before or after the parting by means of a die Component is calibrated.
  • the shaping of the component blank to the finished dimension of the component is achieved by a cold press or cold molding process, a semi-hot press or semi-hot molding process or a hot press or hot molding process.
  • the forming process can take place when the component blank is cold. It is also envisaged to reshape the component blank in a heated state within the die, taking into account the thermal expansion.
  • an additional possibility is that the component blank and / or the die are wetted with lubricant at least in partial areas of the surfaces in contact with one another before calibration.
  • lubricants ensures a wear-free forming process, so that cold welding processes between the component and the die are prevented.
  • the component or the die are wetted or coated with lubricants at least in the critical area of the corresponding surfaces that supports a cold welding process.
  • oil, solid lubricant and / or plastic is used as the lubricant.
  • solid lubricants such as grease or sprayable plastic lubricants ensure the forming process without cold welding processes. It is also advantageous for this that the size of the component is at least partially formed by a forming process that takes place after the manufacturing process of the component blank.
  • the forming process is much easier and faster to design than a cutting or grinding process.
  • the component thus formed has the required tolerance dimensions. i ⁇
  • the component is designed as a rotor or as a rotor housing for a camshaft adjuster.
  • the rotor preferably has four vanes which are arranged uniformly distributed over the circumference with respect to a central axis.
  • the housing preferably has four recesses for the wings, which are distributed uniformly over the circumference with respect to a central axis. During operation, the angular position of the respective wing within the recess is changed with respect to the central axis.
  • the components 1 and 2 shown here are a housing 1 which accommodates a rotor 2. Both the housing 1 and the rotor 2 are coaxial with one Camshaft not shown or arranged coaxially to the camshaft central axis 3. The rotor 2 and the housing 1 are operatively connected via radially extending surfaces 1.3, 2.3.
  • An adjusting mechanism not shown, changes the relative angular position between the rotor 2 and the housing 1 with respect to the central axis 3 during operation.
  • the rotor 2 has four vanes 1.2-1.2 '' 'which are arranged within corresponding recesses 2.2-2.2' '' of the rotor housing 2, a different number of vanes with corresponding recesses being conceivable.
  • the dimensions of the wings 1.2 and the recesses 2.2 are important, which after the continuous casting are shaped or calibrated to the finished size by means of a forming process with the aid of a die.

Abstract

The invention relates to a method for producing components (1, 2) by extrusion or continuous casting. Said components (1,2) are calibrated with the aid of a matrix to a required tolerance value in order to define the size thereof for a forming process. According said invention, a lubricant is arranged between the components (1,2) and the matrix.

Description

Variabler Antrieb für Nockenwelle Variable drive for camshaft
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Bauteils für Kraftfahrzeuge aus einem Stranggussteil oder Strangpressteil einer Metalllegierung.The invention relates to a method for producing a component for motor vehicles from a continuous casting or extrusion of a metal alloy.
Aus der JP 2002-180809 ist ein Ventilantrieb eines Kraftfahrzeuges bekannt, dessen Rotor und Gehäuse aus einer stranggepressten Aluminiumlegierung gefertigt ist. Der Pressung wird dabei in der gewünschten Länge abgeschnitten und anschließend in einem Schneid- und Polierprozess bearbeitet .From JP 2002-180809 a valve drive of a motor vehicle is known, the rotor and housing of which are made from an extruded aluminum alloy. The pressing is cut to the desired length and then processed in a cutting and polishing process.
Der Erfindung liegt die Aufgabe zugrunde, ein Herstellungsverfahren derart auszubilden und anzuordnen, dass eine schnelle und kostengünstige Herstellung gewährleistet ist.The invention is based on the object of designing and arranging a production method in such a way that rapid and cost-effective production is ensured.
Gelöst wird die Aufgabe erfindungsgemäß dadurch, dass durch Teilen des Stranggussteils bzw. -profils oder des Strangpressteils bzw. -profils ein Bauteil-Rohling hergestellt wird und der Bauteil-Rohling in einem Umformprozess vor oder nach dem Teilen mittels einer Matrize auf das erforderliche Maß des Bauteils kalibriert wird.According to the invention, the object is achieved in that a component blank is produced by dividing the extruded part or profile or the extruded part or profile and the component blank is cut to the required dimension in a forming process before or after the parting by means of a die Component is calibrated.
Hierdurch wird erreicht, dass der erstellte Bauteil-Rohling nicht durch einen aufwändigen Zerspan- bzw. Schleifprozess bearbeitet werden muss. Der Umformprozess ist deutlich schneller und einfacher zu bewerkstelligen, da der Bauteil- Rohling lediglich durch einen Pressvorgang innerhalb der Matrize bzw. durch die Matrize erfolgt.This ensures that the created component blank does not have to be processed by a complex machining or grinding process. The forming process is much faster and easier to do because the component Blank is made only by a pressing process within the die or through the die.
Hierzu ist es vorteilhaft, dass die Umformung des Bauteil- Rohlings auf das Fertigmaß des Bauteils durch einen Kaltpress- oder Kaltformprozess, einen Halbwarmpress- oder Halbwarmformprozess oder einen Warmpress- oder Warmformprozess erreicht wird.For this purpose, it is advantageous that the shaping of the component blank to the finished dimension of the component is achieved by a cold press or cold molding process, a semi-hot press or semi-hot molding process or a hot press or hot molding process.
Der Umformprozess kann dabei im kalten Zustand des Bauteil- Rohlings erfolgen. Es ist auch vorgesehen, den Bauteil- Rohling unter Berücksichtigung der Wärmeausdehnung in einem erwärmten Zustand innerhalb der Matrize umzuformen.The forming process can take place when the component blank is cold. It is also envisaged to reshape the component blank in a heated state within the die, taking into account the thermal expansion.
Eine zusätzliche Möglichkeit ist gemäß einer Weiterbildung, dass der Bauteil-Rohling und/oder die Matrize zumindest in Teilbereichen der miteinander in Berührung stehenden Oberflächen vor dem Kalibrieren mit Schmiermittel benetzt werden.According to a further development, an additional possibility is that the component blank and / or the die are wetted with lubricant at least in partial areas of the surfaces in contact with one another before calibration.
Die Verwendung von Schmiermitteln gewährleistet einen verschleißfreien Umformvorgang, so dass Kaltschweißvorgänge zwischen dem Bauteil und der Matrize verhindert werden. Das Bauteil bzw. die Matrize sind dabei zumindest in dem kritischen, einen Kaltschweißvorgang unterstützenden Bereich der korrespondierenden Oberflächen, mit Schmiermitteln benetzt bzw. belegt.The use of lubricants ensures a wear-free forming process, so that cold welding processes between the component and the die are prevented. The component or the die are wetted or coated with lubricants at least in the critical area of the corresponding surfaces that supports a cold welding process.
Ferner ist es vorteilhaft, dass als Schmiermittel Öl, Festschmiermittel und/oder Kunststoff verwendet wird.It is also advantageous that oil, solid lubricant and / or plastic is used as the lubricant.
Die Verwendung von Festschmiermitteln wie Fett oder spritzbare KunststoffSchmiermittel gewährleisten den Umformprozess ohne Kaltschweißvorgänge. Vorteilhaft ist es hierzu auch, dass die Größe des Bauteils zumindest teilweise durch einen nach dem Herstellungsprozess des Bauteil-Rohlings stattfindenden Umformprozess gebildet ist .The use of solid lubricants such as grease or sprayable plastic lubricants ensure the forming process without cold welding processes. It is also advantageous for this that the size of the component is at least partially formed by a forming process that takes place after the manufacturing process of the component blank.
Der Umformprozess ist dabei wesentlich einfacher und schneller zu gestalten als ein Zerspan- oder Schleifprozess . Das so gebildete Bauteil weist die erforderlichen Toleranzmaße auf. i \The forming process is much easier and faster to design than a cutting or grinding process. The component thus formed has the required tolerance dimensions. i \
Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Lösung ist schließlich vorgesehen, dass das Bauteil als Rotor oder als Rotorgehäuse für einen Nockenwellenversteller ausgebildet ist.According to a preferred embodiment of the solution according to the invention, it is finally provided that the component is designed as a rotor or as a rotor housing for a camshaft adjuster.
Von besonderer Bedeutung ist für die vorliegende Erfindung, dass der Rotor vorzugsweise vier, mit Bezug zu einer Mittelachse gleichmäßig über den Umfang verteilt angeordnete Flügel aufweist.It is of particular importance for the present invention that the rotor preferably has four vanes which are arranged uniformly distributed over the circumference with respect to a central axis.
Im Zusammenhang mit der erfindungsgemäßen Ausbildung und Anordnung ist es von Vorteil, dass das Gehäuse vorzugsweise vier, mit Bezug zu einer Mittelachse gleichmäßig über den Umfang verteilt angeordnete Ausnehmungen für die Flügel aufweist. Beim Betrieb wird die Winkellage des jeweiligen Flügels innerhalb der Ausnehmung mit Bezug zur Mittelachse verändert .In connection with the design and arrangement according to the invention, it is advantageous that the housing preferably has four recesses for the wings, which are distributed uniformly over the circumference with respect to a central axis. During operation, the angular position of the respective wing within the recess is changed with respect to the central axis.
Weitere Vorteile und Einzelheiten der Erfindung sind in den Patentansprüchen und in der Beschreibung erläutert und in der Figur dargestellt.Further advantages and details of the invention are explained in the patent claims and in the description and shown in the figure.
Bei den hier dargestellten Bauteilen 1 und 2 handelt es sich um ein Gehäuse 1, das einen Rotor 2 aufnimmt. Sowohl das Gehäuse 1 als auch der Rotor 2 sind hierbei koaxial zu einer nichtdargestellten Nockenwelle bzw. koaxial zur Nockenwellenmittelachse 3 angeordnet. Der Rotor 2 und das Gehäuse 1 stehen dabei über radial verlaufende Oberflächen 1.3, 2.3 in Wirkverbindung. Durch einen nicht dargestellten Verstellmechanismus wird die relative Winkellage zwischen dem Rotor 2 und dem Gehäuse 1 mit Bezug zur Mittelachse 3 während des Betriebs verändert.The components 1 and 2 shown here are a housing 1 which accommodates a rotor 2. Both the housing 1 and the rotor 2 are coaxial with one Camshaft not shown or arranged coaxially to the camshaft central axis 3. The rotor 2 and the housing 1 are operatively connected via radially extending surfaces 1.3, 2.3. An adjusting mechanism, not shown, changes the relative angular position between the rotor 2 and the housing 1 with respect to the central axis 3 during operation.
Hierzu weist der Rotor 2 vier Flügel 1.2 - 1.2''' auf, die innerhalb entsprechender Ausnehmungen 2.2 - 2.2''' des Rotorgehäuses 2 angeordnet sind, wobei auch eine andere Anzahl von Flügeln mit entsprechenden Ausnehmungen denkbar wäre .For this purpose, the rotor 2 has four vanes 1.2-1.2 '' 'which are arranged within corresponding recesses 2.2-2.2' '' of the rotor housing 2, a different number of vanes with corresponding recesses being conceivable.
Beim Herstellungsprozess kommt es im Wesentlichen auf die Maße der Flügel 1.2 und der Ausnehmungen 2.2 an, die nach dem Stranggießen durch einen Umformprozess unter Zuhilfenahme einer Matrize auf das Fertigmaß geformt bzw. kalibriert werden. In the manufacturing process, the dimensions of the wings 1.2 and the recesses 2.2 are important, which after the continuous casting are shaped or calibrated to the finished size by means of a forming process with the aid of a die.

Claims

Patentansprücheclaims
Verfahren zur Herstellung eines Bauteils (1, 2) für Kraftfahrzeuge aus einem Stranggussteil oder Strangpressteil einer Metalllegierung, wobei a) durch Teilen des Stranggussteils oder Strangpressteils ein Bauteil-Rohling hergestellt und b) der Bauteil-Rohling in einem Umformprozess vor oder nach dem Teilen mittels einer Matrize auf das erforderliche Maß des Bauteils (1, 2) kalibriert wird.Method for producing a component (1, 2) for motor vehicles from a continuous casting or extruded part of a metal alloy, wherein a) a component blank is produced by dividing the continuous casting or extruded part and b) the component blank in a forming process before or after the parting a die is calibrated to the required dimension of the component (1, 2).
Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Umformung des Bauteil-Rohlings auf das Fertigmaß des Bauteils (1) durch einen Kaltpress- oder Kaltform- prozess, einen Halbwarmpress- oder Halbwarmformprozess oder einen Warmpress- oder Warmformprozess erreicht wird.A method according to claim 1, characterized in that the shaping of the component blank to the finished dimension of the component (1) is achieved by a cold pressing or cold molding process, a semi-hot pressing or semi-hot molding process or a hot pressing or hot molding process.
Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Bauteil-Rohling und/oder die Matrize zumindest in Teilbereichen der miteinander in Berührung stehendenMethod according to one of the preceding claims, characterized in that the component blank and / or the die at least in partial areas of which are in contact with one another
Oberflächen vor dem Kalibrieren mit Schmiermittel benetzt werden. Surfaces should be wetted with lubricant before calibration.
4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass als Schmiermittel Öl, Festschmiermittel und/oder Kunststoff verwendet wird.4. The method according to any one of the preceding claims, characterized in that oil, solid lubricant and / or plastic is used as the lubricant.
5. Stranggepresstes oder stranggegossenes Bauteil für ein Kraftfahrzeug , dadurch gekennzeichnet, dass die Größe von Bauteilmerkmalen zumindest teilweise durch einen nach dem Herstellungsprozess des Bauteil- Rohlings stattfindenden Umformprozess gebildet ist.5. Extruded or continuously cast component for a motor vehicle, characterized in that the size of component features is at least partially formed by a forming process taking place after the manufacturing process of the component blank.
6. Stranggepresstes oder stranggegossenes Bauteil nach Anspruch 5, dadurch gekennzeichnet, dass das Bauteil als Rotor (2) oder als Rotorgehäuse (1) für einen Nockenwellenversteller ausgebildet ist.6. Extruded or continuously cast component according to claim 5, characterized in that the component is designed as a rotor (2) or as a rotor housing (1) for a camshaft adjuster.
7. Stranggepresstes oder stranggegossenes Bauteil nach Anspruch 6, dadurch gekennzeichnet, dass der Rotor (2) mit Bezug zu einer Mittelachse beliebig über den Umfang verteilt angeordnete Flügel (1.2) aufweist.7. An extruded or continuously cast component as claimed in claim 6, characterized in that the rotor (2) has vanes (1.2) arranged arbitrarily distributed over the circumference with respect to a central axis.
8. Stranggepresstes oder stranggegossenes Bauteil nach Anspruch 7, dadurch gekennzeichnet, dass das Gehäuse (1) mit Bezug zu einer Mittelachse beliebig über den Umfang verteilt angeordnete Ausnehmungen (2.2) für die Flügel (1.2) aufweist. 8. Extruded or continuously cast component according to claim 7, characterized in that the housing (1) with respect to a central axis has any recesses (2.2) arranged around the circumference for the wings (1.2).
PCT/EP2004/003524 2003-04-05 2004-04-02 Variable drive for a camshaft WO2004089574A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006504972A JP2006524574A (en) 2003-04-05 2004-04-02 Variable drive device for camshaft

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10315595.3 2003-04-05
DE10315595 2003-04-05
DE102004011659A DE102004011659A1 (en) 2003-04-05 2004-03-10 Variable drive for camshaft
DE102004011659.8 2004-03-10

Publications (1)

Publication Number Publication Date
WO2004089574A1 true WO2004089574A1 (en) 2004-10-21

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ID=33160608

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/003524 WO2004089574A1 (en) 2003-04-05 2004-04-02 Variable drive for a camshaft

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JP (1) JP2006524574A (en)
WO (1) WO2004089574A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7610885B2 (en) 2005-09-23 2009-11-03 Neumayer Tekfor Holding Gmbh Variable drive for camshafts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4216158A1 (en) * 1992-05-15 1993-11-18 Walter E Spaeth Manufacturing process of wheel key for vehicle wheel - involves extruding cylindrical hollow profile and then cutting off blank and shaping it to required shape
WO1998025715A2 (en) * 1996-12-10 1998-06-18 Aluminum Company Of America Method of producing a forged metal part
US5924199A (en) * 1996-04-30 1999-07-20 General Motors Corporation Steering wheel insert
US6094815A (en) * 1998-02-16 2000-08-01 Zexel Corporation Method of manufacturing rotor for a vane compressor
US20020038501A1 (en) * 2000-10-04 2002-04-04 Kazutoshi Iwasaki Method for manufacturing valve timing adjusting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4216158A1 (en) * 1992-05-15 1993-11-18 Walter E Spaeth Manufacturing process of wheel key for vehicle wheel - involves extruding cylindrical hollow profile and then cutting off blank and shaping it to required shape
US5924199A (en) * 1996-04-30 1999-07-20 General Motors Corporation Steering wheel insert
WO1998025715A2 (en) * 1996-12-10 1998-06-18 Aluminum Company Of America Method of producing a forged metal part
US6094815A (en) * 1998-02-16 2000-08-01 Zexel Corporation Method of manufacturing rotor for a vane compressor
US20020038501A1 (en) * 2000-10-04 2002-04-04 Kazutoshi Iwasaki Method for manufacturing valve timing adjusting apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7610885B2 (en) 2005-09-23 2009-11-03 Neumayer Tekfor Holding Gmbh Variable drive for camshafts

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