DE102009018408A1 - Camshaft for use in internal combustion engine, has cam inserted into shaft pipe, where coating with matrix is provided on joint surface of opening and/or joint surface of shaft pipe, and hard material particles are stored in matrix - Google Patents
Camshaft for use in internal combustion engine, has cam inserted into shaft pipe, where coating with matrix is provided on joint surface of opening and/or joint surface of shaft pipe, and hard material particles are stored in matrix Download PDFInfo
- Publication number
- DE102009018408A1 DE102009018408A1 DE102009018408A DE102009018408A DE102009018408A1 DE 102009018408 A1 DE102009018408 A1 DE 102009018408A1 DE 102009018408 A DE102009018408 A DE 102009018408A DE 102009018408 A DE102009018408 A DE 102009018408A DE 102009018408 A1 DE102009018408 A1 DE 102009018408A1
- Authority
- DE
- Germany
- Prior art keywords
- matrix
- camshaft
- joint surface
- shaft pipe
- material particles
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/025—Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
-
- 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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- 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
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/02—Camshafts
-
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0475—Hollow camshafts
-
- 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
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
Abstract
Description
Die Erfindung betrifft eine Nockenwelle für eine Brennkraftmaschine nach dem Oberbegriff von Patentanspruch 1.The The invention relates to a camshaft for an internal combustion engine according to the preamble of claim 1.
Solche
gebauten Nockenwellen sind dem Stand der Technik in einer Vielzahl
von Ausführungen zu entnehmen. So beschreibt beispielsweise
die
Die
Die Fügeflächen zwischen Wellenrohr und Nocken unterliegen im Betrieb der Nockenwelle zunächst Torsionsbelastungen aufgrund des übertragenen Drehmoments. Hinzu kommen weitere, durch das Eigenschwingungsverhalten der Nockenwelle hervorgerufene Belastungen in axialer und radialer Richtung. Mit zunehmender Schwächung der Fügeverbindung zwischen Nocken und Wellenrohr kann es zu einem vollständigen Versagen des Presssitzes zwischen Nocken und Wellenrohr kommen. Ein Verlust der Funktion der Nockenwelle führt naturgemäß zum vollständigen Verlust der Ventilsteuerung des Motors, was zu schweren Schäden und in der Regel zum Totalausfall des Motors führen wird. Dies gilt es daher auf jeden Fall zu vermeiden.The Subject to joining surfaces between the shaft tube and cam During operation of the camshaft initially torsional loads due to the transmitted torque. There are more, caused by the natural vibration behavior of the camshaft Loads in the axial and radial directions. With increasing weakening the joint between cam and shaft tube can it to a complete failure of the interference fit between Cam and shaft tube come. A loss of function of the camshaft naturally leads to complete Loss of valve control of the engine, causing serious damage and will usually lead to total failure of the engine. This is why it should be avoided in any case.
Der vorliegenden Erfindung liegt somit die Aufgabe zugrunde, die Haltbarkeit des Presssitzes zwischen Nocken und Wellenrohr bei einer gebauten Nockenwelle im Dauerbetrieb zu verbessern.Of the The present invention is therefore based on the object, the durability the interference fit between cam and shaft tube in a built camshaft to improve in continuous operation.
Diese Aufgabe wird durch eine Nockenwelle mit den Merkmalen des Patentanspruchs 1 gelöst.These The object is achieved by a camshaft having the features of the patent claim 1 solved.
Eine derartige Nockenwelle für eine Brennkraftmaschine weist ein Wellenrohr auf, auf welches wenigstens ein Nocken mit einer Durchtrittsöffnung aufgesteckt ist. Zwischen einer Mantelfläche der Durchtrittsöffnung und einem korrespondierenden Mantelflächenbereich des Wellenrohrs liegt dabei ein Presssitz vor, welcher beispielsweise durch thermisches Aufschrumpfen des Nockens auf das Wellenrohr erzeugt werden kann.A such camshaft for an internal combustion engine has a shaft tube, on which at least one cam with a Passage opening is attached. Between a lateral surface the passage opening and a corresponding lateral surface area the shaft tube is an interference fit, which, for example produced by thermal shrinkage of the cam on the shaft tube can be.
Erfindungsgemäß ist vorgesehen, dass auf der Mantelfläche der Durchtrittsöffnung und/oder dem Mantelflächenbereich des Wellenrohrs eine Beschichtung mit einer Matrix, in welche Hartstoffpartikel eingelagert sind, aufgebracht ist. Die Hartstoffpartikel auf einer der genannten Fügeflächen zwischen Wellenrohr und Nocken graben sich unter Ausbildung von Mikroformschlüssen in die korrespondierende Fügefläche ein, was durch die Presspassung zwischen Nocken und Wellenrohr noch verstärkt wird. Hierdurch wird die Drehmomentenübertragung zwischen Wellenrohr und Nocken wesentlich verbessert. Der im Stand der Technik vorhandene reine Reibschluss aufgrund der Presspassung wird durch einen zusätzlichen Formschluss ergänzt, so dass auch die langfristige Haltbarkeit einer derartigen gebauten Nockenwelle wesentlich verbessert wird.According to the invention provided that on the lateral surface of the passage opening and / or the lateral surface region of the shaft tube a Coating with a matrix, embedded in which hard material particles are upset. The hard material particles on one of the mentioned Dig joint surfaces between shaft tube and cam forming microforming into the corresponding joining surface one, which is still due to the interference fit between the cam and shaft tube is reinforced. As a result, the torque transmission significantly improved between shaft tube and cam. The in the state the technology existing pure friction due to the interference fit is supplemented by an additional form fit, so that even the long-term durability of such a built Camshaft is significantly improved.
In einer bevorzugten Ausführungsform der Erfindung ist die Matrix als Chemisch-Nickel-Matrix ausgebildet. Bei der chemischen Nickelabscheidung werden in wässriger Prozesslösung Nickelionen vorgelegt und durch gleichzeitig in der Lösung anwesende Hypophosphitionen reduziert. Das Hypophosphit wird dabei im Reaktionsverlauf selbst zu Orthophosphit oxidiert und lagert sich zumindest teilweise in die abgeschiedene Nickelschicht ein. So erhaltene Nickelschichten haben in der Regel einen Phosphoranteil von etwa 15%. Eine Nickelmatrix ist besonders gut für die Anwendung an einer Nockenwelle geeignet, da bereits die Matrix selbst hochgradig korrosions- und verschleißbeständig ist. Weiterhin ist ein extrem maßgenaues Abscheiden der Nickelschicht auf das jeweils zu beschichtende Bauteil möglich. Auch die Temperaturbeständigkeit von Nickelmatrixes ist mit etwa 500°C sehr gut, so dass einem Einsatz in der nahen Umgebung des Motors nichts im Wege steht.In a preferred embodiment of the invention is the Matrix formed as a chemical nickel matrix. In the chemical Nickel deposition become in aqueous process solution Submitted nickel ions and by simultaneously in the solution reduced hypophosphite ions. The hypophosphite is thereby oxidized and stored in the course of the reaction itself to orthophosphite at least partially into the deposited nickel layer. So obtained nickel layers usually have a phosphorus content of about 15%. A nickel matrix is especially good for the Application suitable on a camshaft, since already the matrix itself highly resistant to corrosion and wear is. Furthermore, an extremely accurate deposition of the Nickel layer on the component to be coated in each case possible. The temperature resistance of nickel matrixes is with about 500 ° C very good, so use in the near Environment of the engine is in the way.
Als Hartstoffpartikel werden bevorzugt Siliziumcarbidpartikel verwendet. Siliziumcarbid zeichnet sich durch eine sehr hohe Härte aus, so dass sich diese Partikel problemlos in die jeweils zugeordnete Fügefläche des Fügeflächenpaares eingraben können und so den gewünschten Mikroformschluss erzeugen. Die Partikelgröße der Hartstoffpartikel beträgt weiterhin bevorzugt 5 bis 15 μm, und liegt damit in der Größenordnung der ebenfalls bevorzugten Schichtdicke von 5 bis 15 μm. Damit ist gewährleistet, dass bei der gewünschten homogenen Verteilung der Hartstoffpartikel in der Matrix hinreichend hohe Rauheitsspitzen entstehen, welche zum Mikroformschluss zwischen Wellenrohr und Nocken führen.When Hard material particles preferably silicon carbide particles are used. Silicon carbide is characterized by a very high hardness out, so that these particles easily into the respectively associated joint surface of the mating surface pair can dig and thus produce the desired microforming. The particle size the hard material particles is furthermore preferably 5 to 15 microns, and is thus in the order of magnitude the likewise preferred layer thickness of 5 to 15 microns. This ensures that the desired homogeneous distribution of the hard particles in the matrix sufficient high roughness peaks arise, which leads to microforming Lead shaft tube and cam.
Im Folgenden soll die Erfindung und ihre Ausführungsformen anhand der Zeichnung näher erläutert werden. Die einzige Figur zeigt hierbei eine schematische Darstellung zweier korrespondierender Fügeflächen mit zwischengelagerter Matrix mit Hartstoffpartikeln.in the Following is the invention and its embodiments will be explained in more detail with reference to the drawing. The only figure shows a schematic representation of two corresponding joining surfaces with intermediately stored Matrix with hard material particles.
Eine
im Ganzen mit
Im
Betrieb der Nockenwelle unterliegt die Verbindung zwischen Wellenrohr
Um
die Haltbarkeit der Verbindung zwischen Wellenrohr
Durch
die homogene Verteilung der Hartstoffpartikel
Die Hartstoffpartikel können dabei aus Siliziumcarbid, Wolframcarbid, Diamant oder ähnlichen Hartstoffen bestehen. Die konkrete Auswahl richtet sich dabei nach der Auslegung des Motors, in welcher die Nockenwelle Verwendung finden soll, da durch den Motor ja die zu übertragenden Drehmomente vorgegeben werden.The Hard material particles may consist of silicon carbide, tungsten carbide, Diamond or similar hard materials exist. The concrete one Selection depends on the design of the engine, in which the camshaft should be used, because by the engine yes the be given to be transmitted torques.
- 1010
- FügeverbindungRetaining compound
- 1212
- Wellenrohrwave tube
- 1414
- Nockecam
- 1616
- Fügeflächejoining surface
- 1818
- Fügeflächejoining surface
- 2020
- Pfeilarrow
- 2222
- Pfeilarrow
- 2424
- Pfeilarrow
- 2626
- Pfeilarrow
- 2828
- Beschichtungcoating
- 3030
- Matrixmatrix
- 3232
- HartstoffpartikelHard particles
- 3434
- Oberflächesurface
- dd
- Schichtdickelayer thickness
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 3803683 A1 [0002] - DE 3803683 A1 [0002]
- - DE 19938791 A1 [0003] - DE 19938791 A1 [0003]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009018408A DE102009018408A1 (en) | 2009-04-22 | 2009-04-22 | Camshaft for use in internal combustion engine, has cam inserted into shaft pipe, where coating with matrix is provided on joint surface of opening and/or joint surface of shaft pipe, and hard material particles are stored in matrix |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009018408A DE102009018408A1 (en) | 2009-04-22 | 2009-04-22 | Camshaft for use in internal combustion engine, has cam inserted into shaft pipe, where coating with matrix is provided on joint surface of opening and/or joint surface of shaft pipe, and hard material particles are stored in matrix |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102009018408A1 true DE102009018408A1 (en) | 2009-10-29 |
Family
ID=41112116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102009018408A Withdrawn DE102009018408A1 (en) | 2009-04-22 | 2009-04-22 | Camshaft for use in internal combustion engine, has cam inserted into shaft pipe, where coating with matrix is provided on joint surface of opening and/or joint surface of shaft pipe, and hard material particles are stored in matrix |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102009018408A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9249692B2 (en) | 2011-07-21 | 2016-02-02 | Mahle International Gmbh | Camshaft and associate manufacturing method |
WO2016181363A1 (en) * | 2015-05-13 | 2016-11-17 | STREPARAVA S.p.A. CON SOCIO UNICO | Method for manufacturing a shaft with shaped profile |
US9828889B2 (en) | 2011-07-21 | 2017-11-28 | Mahle International Gmbh | Camshaft and corresponding production method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3803683A1 (en) | 1988-02-07 | 1989-08-17 | Emitec Emissionstechnologie | BUILT SHAFT, IN PARTICULAR CAMSHAFT, CRANKSHAFT OR GEAR SHAFT |
DE19938791A1 (en) | 1999-08-16 | 2001-03-01 | Neumayer Erich Gmbh Co Kg | Process for producing a built camshaft and device for carrying out this process |
-
2009
- 2009-04-22 DE DE102009018408A patent/DE102009018408A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3803683A1 (en) | 1988-02-07 | 1989-08-17 | Emitec Emissionstechnologie | BUILT SHAFT, IN PARTICULAR CAMSHAFT, CRANKSHAFT OR GEAR SHAFT |
DE19938791A1 (en) | 1999-08-16 | 2001-03-01 | Neumayer Erich Gmbh Co Kg | Process for producing a built camshaft and device for carrying out this process |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9249692B2 (en) | 2011-07-21 | 2016-02-02 | Mahle International Gmbh | Camshaft and associate manufacturing method |
US9828889B2 (en) | 2011-07-21 | 2017-11-28 | Mahle International Gmbh | Camshaft and corresponding production method |
DE102012212625B4 (en) | 2011-07-21 | 2021-09-09 | Mahle International Gmbh | Camshaft and cams |
WO2016181363A1 (en) * | 2015-05-13 | 2016-11-17 | STREPARAVA S.p.A. CON SOCIO UNICO | Method for manufacturing a shaft with shaped profile |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20141101 |