DE10349901A1 - Method for creation of toothed outer surface of camshaft, comprising use of heat and pressure - Google Patents
Method for creation of toothed outer surface of camshaft, comprising use of heat and pressure Download PDFInfo
- Publication number
- DE10349901A1 DE10349901A1 DE10349901A DE10349901A DE10349901A1 DE 10349901 A1 DE10349901 A1 DE 10349901A1 DE 10349901 A DE10349901 A DE 10349901A DE 10349901 A DE10349901 A DE 10349901A DE 10349901 A1 DE10349901 A1 DE 10349901A1
- Authority
- DE
- Germany
- Prior art keywords
- camshaft
- cam
- external toothing
- toothing
- basic
- 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- Withdrawn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
-
- 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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- 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
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
- B21H5/027—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls by rolling using reciprocating flat dies, e.g. racks
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
- F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer eine Außenverzahnung aufweisenden Nockenwelle gemäß dem Oberbegriff der nebengeordneten Patentansprüche 1 und 3.The The invention relates to a method for producing an outer toothing having camshaft according to the preamble the independent claims 1 and 3.
Zur Verbesserung der thermodynamischen Eigenschaften von Brennkraftmaschinen sind mechanische Vorrichtungen bekannt, die das Arbeitsspiel des Ventiltriebes beeinflussen und beispielsweise eine drehzahlabhängige Veränderung der Öffnungszeiten oder des Hubes der Gaswechselventile ermöglichen.to Improvement of the thermodynamic properties of internal combustion engines are known mechanical devices that the working cycle of the Valve drive affect and, for example, a speed-dependent change the opening hours or the stroke of the gas exchange valves allow.
Aus
der Druckschrift
Aus
der Druckschrift
In die Grundnockenwelle kann eine derartige Verzahnung, die vorteilhaft als Vielzahlverzahnung ausgebildet ist, beispielsweise durch Fräsen eingebracht werden. Der wesentliche Nachteil einer durch Fräsen hergestellten Vielzahlverzahnung besteht in den sehr hohen Bearbeitungskosten.In The basic camshaft can have such a toothing, which is advantageous is formed as a plurality of teeth, introduced for example by milling become. The main disadvantage of a variety of teeth produced by milling consists in the very high processing costs.
Der Erfindung liegt die Aufgabe zugrunde ein Verfahren zur Herstellung einer eine Außenverzahnung aufweisenden Nockenwelle anzugeben, das kostengünstig auszuführen ist, und das dabei die erforderliche Festigkeit gewährleistet.Of the Invention is based on a process for the preparation of the object one external toothing Specify having camshaft, which is cost-effective, while ensuring the required strength.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale in den Kennzeichen der nebengeordneten Patentansprüche 1 und 3 gelöst.These The object is achieved by the Features in the characteristics of the independent claims 1 and 3 solved.
Demnach kann die Nockenwelle hergestellt werden, indem zuerst eine Grundnockenwelle hergestellt wird, in die anschließend durch Walzen die Außenverzahnung aufgebracht wird.Therefore The camshaft can be made by first a basic camshaft is produced in the then by rolling the external teeth is applied.
Anschließend wird die die Außenverzahnung aufweisenden Nockenwelle beispielsweise durch Titannitrieren gehärtet.Subsequently, will which have the external teeth Camshaft, for example hardened by titanium nitriding.
Alternativ kann die Nockenwelle hergestellt werden, indem zuerst eine Grundnockenwelle hergestellt wird. Die Außenverzahnung wird auf ein Rohrmaterial aufgebracht, welches anschließend in einem thermischen Schrumpfprozess mit der Grundnockenwelle verbunden wird.alternative The camshaft can be made by first a basic camshaft will be produced. The external toothing is applied to a pipe material, which subsequently in a thermal shrinkage process connected to the base camshaft becomes.
Dabei ist ebenfalls vorgesehen, dass das die Außenverzahnung aufweisende Rohrmaterial gehärtet wird. Dies erfolgt bevor das die Außenverzahnung aufweisende Rohrmaterial mit der Grundnockenwelle verbunden wird.there It is also envisaged that the outer toothing having pipe material hardened becomes. This is done before the outer toothing having pipe material is connected to the basic camshaft.
Die Außenverzahnung der Grundnockenwelle wird zur drehfesten und axial verschiebbaren Verbindung mindestens eines eine Innenverzahnung aufeisenden Nockenstückes verwendet. Dabei ist vorgesehen, dass die Außenverzahnung in genau den Bereichen der Grundnockenwelle ausgebildet wird, in denen das mindestens eine Nockenstück axial verschoben wird.The external teeth the basic camshaft becomes non-rotatable and axially displaceable Connection of at least one internal toothing aufeisenden cam piece used. It is envisaged that the external teeth in exactly the Is formed areas of the basic camshaft in which the at least a cam piece is moved axially.
Durch die erfindungsgemäßen Verfahren zur Herstellung einer eine Außenverzahnung aufweisenden Nockenwelle können hochfeste Nockenwellen kostengünstig hergestellt.By the methods of the invention for producing an external toothing having camshaft can high-strength camshafts cost-effective produced.
Im folgenden sind die erfindungsgemäßen Verfahren zur Herstellung einer eine Außenverzahnung aufweisenden Nockenwelle anhand von zwei Ausführungsbeispielen im Zusammenhang mit zwei Figuren dargestellt und erläutert.in the The following are the methods of the invention for producing an external toothing having camshaft based on two embodiments in connection illustrated and explained with two figures.
Es zeigen:It demonstrate:
Eine sechszylindrige Brennkraftmaschine mit zwei obenliegenden Nockenwellen zum Antrieb eines Kraftfahrzeuges ist mit einer Vorrichtung zum Verstellen des Hubes und der Öffnungszeiten der einlassseitigen Gaswechselventile ausgestattet. Die Vorrichtung besteht aus sechs Nockenpakten, die drehfest und axial verschiebbar auf der die einlassseitigen Gaswechselventile betätigenden Nockenwelle angeordnet sind. Dabei ist jedes Nockenpaket genau einem Zylinder zugeordnet, wobei jeder Zylinder der Brennkraftmaschine einlassseitig zwei Gaswechselventile aufweist. Entsprechend sind auf dem Nockenstück zwei Nocken ausgebildet, wobei jeder Nocken ein einlassseitiges Gaswechselventil betätigt.A six-cylinder internal combustion engine with two overhead camshafts for driving a motor vehicle is equipped with a device for adjusting the stroke and the opening times of the inlet-side gas exchange valves. The device consists of six cam pacts which are non-rotatably and axially displaceably arranged on the inlet side gas exchange valves actuated camshaft. Each cam package is assigned to exactly one cylinder, with each cylinder of the internal combustion engine having two gas on the inlet side has exchange valves. Accordingly, two cams are formed on the cam piece, wherein each cam actuates an inlet-side gas exchange valve.
Zum Erzeugen unterschiedlicher Ventilhübe weist jeder der zwei Nocken eines Nockenpaketes zwei sich unterscheidende Hubprofile auf, durch welche ein Gaswechselventil beim Betrieb der Brennkraftmaschine unterschiedlich tief in den Brennraum eines Zylinders der Brennkraftmaschine verschoben wird. Zudem sind die zwei Hubprofile eines Nockens so ausgeformt, dass eine Phasenverschiebung bei der Betätigung des jeweiligen Gaswechselventils erfolgt, wodurch unterschiedliche Öffnungszeiten der Gaswechselventile bewirkt werden.To the Generating different valve strokes has each of the two cams a cam package on two different Hubprofile on, through which a gas exchange valve during operation of the internal combustion engine different deep into the combustion chamber of a cylinder of the internal combustion engine is moved. In addition, the two Hubprofile a cam are so formed that a phase shift in the operation of the respective gas exchange valve, whereby different opening times the gas exchange valves are effected.
Zum axialen Verschieben ist an beiden Seiten der Nockenstücke jeweils ein Schneckentrieb ausgebildet, in dem eine Kurvenbahn als Vertiefung ausgebildet ist. Die Kurvenbahnen der zwei Schneckentriebe eines Nockenstückes sind dabei zueinander spiegelbildlich ausgebildet, wodurch das axiale Verschieben des Nockenstückes in beide Richtung bewirkt wird.To the axial displacement is on both sides of the cam pieces respectively a worm gear formed in which a curved path formed as a recess is. The cam tracks of the two worm gears of a cam piece are thereby mirror images of each other, whereby the axial displacement of the cam piece is effected in both directions.
Die axiale Verschiebung der Nockenstücke erfolgt durch radial zur Nockenwelle angeordnete Stellglieder, die als elektromagnetische Ventile ausgebildet sind, und die jeweils aus einem Betätigungsstift und aus zwei Elektromagneten beste hen. Die Stellglieder sind fest mit dem Zylinderkopf der Brennkraftmaschine verbunden. Durch die Elektromagneten kann der Betätigungsstift ausgefahren und zurückgezogen werden. Im ausgefahrenen Zustand greift der Betätigungsstift in die die Kurvenbahn bildende Vertiefung eines Schneckentriebes, wobei das Nockenstück durch die Drehung der Nockenwelle beim Betrieb der Brennkraftmaschine axial verschoben wird.The axial displacement of the cam pieces takes place by radially to the camshaft arranged actuators, which are electromagnetic Valves are formed, and each of an actuating pin and two electromagnets hen best. The actuators are fixed connected to the cylinder head of the internal combustion engine. By the Electromagnet can be the actuating pin extended and withdrawn become. In the extended state, the actuating pin engages in the curved path forming recess of a worm drive, wherein the cam piece through the rotation of the camshaft during operation of the internal combustion engine is moved axially.
Die die Drehfestigkeit bei gleichzeitiger axialer Verschiebbarkeit ermöglichende Verbindung zwischen der Nockenwelle und dem Nockenstück besteht in einer Verzahnung, die als Außenverzahnung in der Nockenwelle und als Innenverzahnung in dem Nockenstück hergestellt wird. Die Verzahnung ist dabei als Vielzahlverzahnung ausgebildet, wobei die Nockenwelle einen Außenvielzahn aufweist, und die Nockenstücke einen Innenvielzahn.The the torsional strength with simultaneous axial displacement enabled There is a connection between the camshaft and the cam piece in a toothing, which is called external toothing in the camshaft and produced as internal teeth in the cam piece becomes. The toothing is designed as a plurality of teeth, wherein the camshaft has an external serration and the cam pieces an internal serrated tooth.
Die
Nach
dem Abkühlen
wird die den Außenvielzahn
Dabei
wird wieder zuerst eine Grundnockenwelle
Anschließend werden
die Nockenstücke
mittels eines thermischen Schrumpfprozesses mit der Grundnockenwelle
Durch die dargestellten Verfahren zur Herstellung einer eine Außenverzahnung aufweisenden Nockenwelle entstehen hochfeste Nockenwellen, wobei die Verfahren kostengünstig anzuwenden sind.By the illustrated method for producing an external toothing having camshaft arise high-strength camshafts, wherein the procedures cost-effective are to be applied.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10349901A DE10349901A1 (en) | 2003-10-25 | 2003-10-25 | Method for creation of toothed outer surface of camshaft, comprising use of heat and pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10349901A DE10349901A1 (en) | 2003-10-25 | 2003-10-25 | Method for creation of toothed outer surface of camshaft, comprising use of heat and pressure |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10349901A1 true DE10349901A1 (en) | 2005-06-16 |
Family
ID=34584773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10349901A Withdrawn DE10349901A1 (en) | 2003-10-25 | 2003-10-25 | Method for creation of toothed outer surface of camshaft, comprising use of heat and pressure |
Country Status (1)
Country | Link |
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DE (1) | DE10349901A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104400368A (en) * | 2014-11-19 | 2015-03-11 | 罗光政 | Method for manufacturing metal rack by virtue of profiling rolling |
CN105903867A (en) * | 2015-02-19 | 2016-08-31 | 加特可株式会社 | Spline shaft and manufacturing method thereof |
WO2018162601A1 (en) | 2017-03-09 | 2018-09-13 | Thyssenkrupp Presta Teccenter Ag | Camshaft with a lubricated sliding piece |
WO2019034516A1 (en) | 2017-08-16 | 2019-02-21 | Thyssenkrupp Presta Teccenter Ag | Sliding element with partially hardened latching elevation |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3717190C2 (en) * | 1987-05-22 | 1989-03-09 | Etablissement Supervis, Vaduz, Li | |
DE4230877A1 (en) * | 1991-09-30 | 1993-04-01 | Volkswagen Ag | Control for lift valve with two cams - comprises cam block containing two cams which is axially displaceable but non rotatable peripherally on camshaft |
DE19710847C2 (en) * | 1997-03-15 | 1999-01-07 | Selzer Fertigungstech | Composite control shaft and process for its manufacture |
DE10148243A1 (en) * | 2001-09-28 | 2003-04-10 | Ina Schaeffler Kg | Valve drive with valve lift changing for the gas shuttle valve of a four-stroke internal combustion engine comprises a toothed shaft with an external tooth arrangement |
-
2003
- 2003-10-25 DE DE10349901A patent/DE10349901A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3717190C2 (en) * | 1987-05-22 | 1989-03-09 | Etablissement Supervis, Vaduz, Li | |
DE4230877A1 (en) * | 1991-09-30 | 1993-04-01 | Volkswagen Ag | Control for lift valve with two cams - comprises cam block containing two cams which is axially displaceable but non rotatable peripherally on camshaft |
DE19710847C2 (en) * | 1997-03-15 | 1999-01-07 | Selzer Fertigungstech | Composite control shaft and process for its manufacture |
DE10148243A1 (en) * | 2001-09-28 | 2003-04-10 | Ina Schaeffler Kg | Valve drive with valve lift changing for the gas shuttle valve of a four-stroke internal combustion engine comprises a toothed shaft with an external tooth arrangement |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104400368A (en) * | 2014-11-19 | 2015-03-11 | 罗光政 | Method for manufacturing metal rack by virtue of profiling rolling |
CN105903867A (en) * | 2015-02-19 | 2016-08-31 | 加特可株式会社 | Spline shaft and manufacturing method thereof |
CN105903867B (en) * | 2015-02-19 | 2018-04-03 | 加特可株式会社 | Splined shaft and its manufacture method |
WO2018162601A1 (en) | 2017-03-09 | 2018-09-13 | Thyssenkrupp Presta Teccenter Ag | Camshaft with a lubricated sliding piece |
WO2019034516A1 (en) | 2017-08-16 | 2019-02-21 | Thyssenkrupp Presta Teccenter Ag | Sliding element with partially hardened latching elevation |
DE102017214297A1 (en) | 2017-08-16 | 2019-02-21 | Thyssenkrupp Ag | Sliding element with partially hardened grid lift |
US11466595B2 (en) | 2017-08-16 | 2022-10-11 | Thyssenkrupp Presta Teccenter Ag | Sliding element with partially hardened latching elevation |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |