EP1432890B1 - Arbre a cames et procede de fabrication - Google Patents

Arbre a cames et procede de fabrication Download PDF

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Publication number
EP1432890B1
EP1432890B1 EP02758031A EP02758031A EP1432890B1 EP 1432890 B1 EP1432890 B1 EP 1432890B1 EP 02758031 A EP02758031 A EP 02758031A EP 02758031 A EP02758031 A EP 02758031A EP 1432890 B1 EP1432890 B1 EP 1432890B1
Authority
EP
European Patent Office
Prior art keywords
shaft
camshaft
diameter
ground
cams
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.)
Expired - Lifetime
Application number
EP02758031A
Other languages
German (de)
English (en)
Other versions
EP1432890A1 (fr
Inventor
Peter Meusburger
Oskar MÜLLER
Peter Wiesner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thyssenkrupp Dynamic Components Teccenter AG
Original Assignee
ThyssenKrupp Presta AG
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Filing date
Publication date
Application filed by ThyssenKrupp Presta AG filed Critical ThyssenKrupp Presta AG
Publication of EP1432890A1 publication Critical patent/EP1432890A1/fr
Application granted granted Critical
Publication of EP1432890B1 publication Critical patent/EP1432890B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams

Definitions

  • the invention relates to a camshaft for receiving cams according to the preamble of claim 1 and to a method for producing a camshaft for mounting cams according to the preamble of claim 4.
  • Camshafts of this type are used for controlling machine parts, in particular for controlling parts in internal combustion engines, such as for valves.
  • composite camshafts also referred to as built camshafts
  • control cams are mounted on the camshaft and fastened in the space provided, for example by welding or pressing with the shaft.
  • the control shaft can consist of solid material as well as of tube material.
  • solid material cams can also be made of sheet metal, for example by sheet metal forming, as disclosed in the published patent applications DE 196 40 872 .
  • DE 100 24 553 and the patent US 5,201,246 has become known, for example.
  • the object of the invention is to eliminate the disadvantages of the prior art.
  • the object is to realize a camshaft with a suitable manufacturing method, which makes it possible to produce bearings with consistently high quality and this with high efficiency.
  • the object is achieved according to the invention in that the camshaft is ground prior to the camshaft assembly in the area of future bearings in such a way that the sensitive bearings have a smaller diameter than the main diameter of the shaft.
  • the bearings are here advantageously simultaneously, ie with a single operation, ground. This allows a particularly economical production with good and consistent quality.
  • a further advantageous simplification results when the shaft is formed as a tube. This can further save weight and material.
  • the procedure according to the invention drastically reduces the risk of damage to the bearing points during the assembly of the cams.
  • these can, as their opening corresponds to the larger shaft diameter, be passed over this without damaging the bearings and attached to the designated location.
  • Another advantage is that the grinding time is shortened because the required dimensional accuracy for the grinding is lower for the axial position of the bearing. Furthermore, the previously additional punctures are no longer required side of the bearing to be provided.
  • camshaft and method are suitable for all types of cam in an advantageous manner.
  • the use of cams made of sheet metal material is particularly suitable, since a large weight saving is possible thereby and a particularly economical production of the camshaft as a whole can be achieved.
  • the production of the metal cam from a profile profiled in cam bar profile, which is cut to length in the width of the cam to be created and is then joined, for example, by welding or pressing on the shaft at the designated location.
  • the inventive method now offers further advantages.
  • the shaft can be held in one or more storage areas during the grinding operation. This increases the precision of the cam contour and reduces the susceptibility to errors.
  • only the cam contours and thrust bearing surfaces and possibly special surfaces, such as cones have to be ground for receiving pulleys. In the overall process thereby the grinding time is shortened and the grinding process more robust.
  • a camshaft 5 is shown for receiving cams and for receiving camshaft bearing, which is ground at least in some areas according to the invention on the shaft surface to a certain diameter diameter.
  • the camshaft 5 is advantageously tubular in shape to save material and weight.
  • the surface of this shaft 5 is ground at least in areas where the shaft 5 is to be stored in the future at the so-called bearings 51 and ground to a smaller diameter compared to the original shaft diameter or the larger shaft diameter.
  • the ground smaller diameter of the shaft 5 is compared to the shaft diameter by a few hundredths to a few tenths mm be smaller. As a result, can be drawn up on the shaft 5 cams 6 without injury to the sensitive bearings 51 and fasten it to the designated location 7 on the shaft 5.
  • the shaft 5 is thus ground before the camshaft assembly.
  • the future bearings 51 are all ground simultaneously so that the sensitive bearing 51 has a slightly thinner diameter, whereby the risk of damage in the subsequent assembly of the cam 6 is reduced.
  • Another advantage is that the grinding time can be shortened and the required dimensional accuracy in the axial direction for positioning of the bearings is reduced.
  • the often customary additional recesses on the side of the bearing to be arranged in the shaft 5 are no longer required by the inventive procedure.
  • cam 6 is used for camshafts produced in this way, which cam is designed as a sheet metal construction, as shown in cross section in FIG.
  • Such metal cams are formed, for example, in cross-section T-shaped and are advantageously connected to a first angular sheet metal part 1 and a second angular sheet metal part 2 together to form a T-shaped cam part, which has a precise running surface on the outside, on demand also on Mass and can be ground according to the desired curve shape.
  • Such sheet metal parts can be produced in a simple manner in mass production, for example as pressed sheet metal half shells.
  • positioning means 11 may be provided on the sheet metal parts 1, 2, which, for example can be produced as a nub or dent by pressing in the sheet metal parts.
  • the sheet metal parts 1, 2 additionally have an opening corresponding to the shaft 5, which make it possible to raise the cam 6 formed therefrom onto the shaft.
  • a sleeve 3 is pressed between the sheet metal cam 6 and the shaft 5.
  • the sleeve 3 is made of softer material and the sheet metal parts 1, 2 of the metal cam 6 made of curable material.
  • a roller 7 is provided in the region of the cam set position on the shaft 5, which produces a slight excess in this area relative to the shaft diameter.
  • cams which are made of solid material.
  • metal cams 6 is far more preferred in this regard, on the one hand for reasons of weight on the other hand for cost reasons, and in combination with the inventive ground shaft, it is possible to place the bearings extremely close to the cam 6, because as shown in Fig. 2, the bearings 51st can even be ground so that bearings can be brought close to the mounted cam 6 or even easily undercut the outer contour of the cam 6, as shown by the distance designation d in Fig. 2.
  • the inventive grinding of the bearings 51 on the camshaft 5 no additional puncturing operations for positioning and delimitation of the bearings necessary, as is common in the prior art.
  • the corresponding shaping of the end regions of the ground bearing points 51 can be predetermined.
  • the original diameter of the shaft 5 is designated RD and the ground bearing diameter with LD.
  • LB denotes the bearing width and SB the disc outlet width. Due to the bevel in the edge region of the bearing width LB, tilting when mounting the cams 6 can additionally be prevented.
  • the procedure may be as follows.
  • the shaft 5 is ground by a wide grinding roller SW1 and a regulating wheel SW2 over its entire length to its outer diameter RD, as shown in FIG. 4 in longitudinal section.
  • Regulating wheels are used in grinding arrangements for positioning the grinding wheels or for adjusting the grinding mass (see Dubbel, page T93, Figure 49).
  • the shaft 5 is ground to the desired reduced Lager gutmessermass LD, as shown in Fig. 5 is.
  • the discs can be formed in the edge region according to the desired outlet shape, for example for a Transition from diameter LD to RD, which is formed obliquely.
  • a further preferred variant with a wide profiled grinding wheel SW1 and a wide profiled regulating wheel SW2 is shown in section. This solution allows the simultaneous plunge grinding of bearings and the grinding of the shaft diameter RD together.
  • a further preferred embodiment of the inventive method is that between the bearings 51 and the cam set position 7, the shaft remains unground with its outer diameter RD.
  • the shaft remains unground with its outer diameter RD.
  • sets of grinding wheels S1 and regulating wheel sets S2, which are alternately arranged at such a distance that at the correspondingly desired positions on the shaft recordings A for mounting bearings L for producing the bearing points 51 and cam set positions N can be ground.
  • the procedure here is very efficient, since the entire grinding process can be performed simultaneously, wherein the bearings 51 are ground according to the invention to the smallest shaft diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (9)

  1. Arbre à cames prévu pour recevoir des cames (6) et pour recevoir des paliers d'arbre à cames, qui est rectifié à une dimension déterminée de diamètre sur la surface d'enveloppe de l'arbre, au moins dans des zones partielles, caractérisé en ce que l'arbre (5) est rectifié, dans des zones des positions prévues (51) de paliers, à un diamètre plus petit (LD) que le diamètre plus grand (RD) d'arbre.
  2. Arbre à cames selon la revendication 1, caractérisé en ce que le diamètre rectifié plus petit (LD) de l'arbre (5) est plus petit, de quelques centièmes à quelques dixièmes de mm, que le diamètre (RD) d'arbre.
  3. Arbre à cames selon la revendication 1 ou 2, caractérisé en ce que l'arbre (5) est de structure tubulaire.
  4. Procédé de fabrication d'un arbre à cames (5) prévu pour le montage de cames (6) et comportant des positions (51) de palier, caractérisé en ce que les positions (51) de palier sont rectifiées à un diamètre plus petit (LD) que le diamètre (RD) d'arbre et en ce que les cames (6) sont ensuite glissées, lors de leur montage, à leur emplacement prévu à cet effet sur l'arbre (5) à diamètre plus grand (RD) d'arbre, sans se coincer sur les positions (51) de palier et sans endommager celles-ci.
  5. Procédé de fabrication d'un arbre à cames selon la revendication 4, caractérisé en ce que le processus de rectification s'effectue simultanément pour plusieurs emplacements (51) de paliers, et en particulier simultanément avec une rectification additionnelle de la surface de l'arbre, dans la mesure où celle-ci est prévue.
  6. Procédé de fabrication d'un arbre à cames selon la revendication 4 ou 5, caractérisé en ce que les cames (6) consistent en pièces de tôle (1, 2, 3)
  7. Procédé de fabrication d'un arbre à cames selon l'une quelconque des revendications 4 à 6, caractérisé en ce que les cames (6) sont fabriquées à partir d'un profilé de forme tubulaire.
  8. Procédé de fabrication d'un arbre à cames selon l'une quelconque des revendications 4 à 7, caractérisé en ce que l'arbre à cames (5) est de structure tubulaire.
  9. Procédé de fabrication d'un arbre à cames selon l'une quelconque des revendications 4 à 8, caractérisé en ce que le diamètre (LD) de la position rectifiée (51) de palier est plus petite, de quelques centièmes à quelques dixièmes de mm, que le diamètre plus grand (RD) de l'arbre.
EP02758031A 2001-09-27 2002-09-09 Arbre a cames et procede de fabrication Expired - Lifetime EP1432890B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH178001 2001-09-27
CH17802001 2001-09-27
PCT/CH2002/000491 WO2003027446A1 (fr) 2001-09-27 2002-09-09 Arbre a cames et procede de fabrication

Publications (2)

Publication Number Publication Date
EP1432890A1 EP1432890A1 (fr) 2004-06-30
EP1432890B1 true EP1432890B1 (fr) 2007-07-25

Family

ID=4566250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02758031A Expired - Lifetime EP1432890B1 (fr) 2001-09-27 2002-09-09 Arbre a cames et procede de fabrication

Country Status (6)

Country Link
US (1) US20040244528A1 (fr)
EP (1) EP1432890B1 (fr)
AT (1) ATE368174T1 (fr)
DE (1) DE50210565D1 (fr)
ES (1) ES2288557T3 (fr)
WO (1) WO2003027446A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013210403A1 (de) 2013-06-05 2014-12-11 Mahle International Gmbh Verfahren zur Herstellung einer Nockenwelle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10219195C1 (de) * 2002-04-29 2003-11-27 Thyssen Krupp Automotive Ag Einstückig ausgebildeter Nocken
DE102007013039A1 (de) 2007-03-19 2008-09-25 Schaeffler Kg Verfahren der Anordnung eines ungeteilten Wälzlagers an einer Welle und Wälzlager dafür
US8887682B2 (en) * 2012-12-11 2014-11-18 Mahle International Gmbh Low friction camshaft
DE102014106924A1 (de) 2014-05-16 2015-11-19 Thyssenkrupp Presta Teccenter Ag Verfahren zur Herstellung einer gebauten Nockenwelle

Family Cites Families (26)

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Publication number Priority date Publication date Assignee Title
US1984936A (en) * 1932-12-01 1934-12-18 Norton Co Grinding wheel
US2284606A (en) * 1939-10-13 1942-05-26 Norton Co Camshaft bearing grinding machine
US4419845A (en) * 1980-03-25 1983-12-13 Ernst Thielenhaus Kg Method of and apparatus for finish-grinding a camshaft
JPS61290271A (ja) * 1985-06-18 1986-12-20 Nippon Piston Ring Co Ltd 中空カムシヤフト
DE3536296C1 (de) * 1985-10-11 1987-03-26 Supervis Ets Nockenwelle
DE8626272U1 (de) * 1986-10-01 2000-08-17 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Lohmar Gebaute Nockenwelle aus einem Wellenrohr und aufgeschobenen Elementen
DE3717190A1 (de) * 1987-05-22 1988-12-15 Supervis Ets Nockenwelle zur steuerung von ventilen bei verbrennungskraftmaschinen und verfahren zu ihrer herstellung
DE3740597A1 (de) * 1987-11-30 1989-06-08 Grieshaber Masch Flexible mehrstationige maschine zur bearbeitung von rotationssymmetrischen oberflaechen
JP3163505B2 (ja) * 1991-06-07 2001-05-08 日本ピストンリング株式会社 シャフトを嵌合部材に圧入してなる機械要素及びその製造方法
DE4121951C1 (fr) * 1991-07-03 1992-12-24 Supervis Ets
US5280675A (en) * 1992-07-13 1994-01-25 The Torrington Company Camshaft and method of making a camshaft
US5201246A (en) 1992-07-20 1993-04-13 General Motors Corporation Lightweight composite camshaft
US5371973A (en) * 1992-09-30 1994-12-13 Western Atlas Inc. Grinding machine utilizing multiple, parallel, abrasive belts simultaneously grinding surfaces on a workpiece
US5437097A (en) * 1993-06-01 1995-08-01 Matsumoto Heavy Industry Co. Ltd. Method and apparatus for manufacturing a cam shaft
DE4320945C2 (de) * 1993-06-24 1996-05-23 Grieshaber Masch Bandschleifmaschine
DE19608983A1 (de) * 1995-03-17 1996-09-19 Volkswagen Ag Steuerwelle und Verfahren zu ihrer Herstellung
DE19640872C2 (de) 1996-10-04 1999-07-01 Ind Fahrzeugtechnik Gmbh & Co Nocken für gebaute Nockenwelle
DE19828239A1 (de) * 1998-06-25 2000-01-13 Hegenscheidt Mfd Gmbh Vorrichtung zum spanabhebenden Bearbeiten von Werkstücken
MXPA00012909A (es) * 1998-06-25 2002-04-24 Unova Uk Ltd Aparato y metodo para pulir piezas de trabajo compuestas.
GB2338912A (en) * 1998-06-30 2000-01-12 Cummins Engine Co Ltd Method of manufacturing a camshaft
US6182361B1 (en) 1999-05-20 2001-02-06 The Torrington Company Method for assembling a camshaft
DE19938791B4 (de) * 1999-08-16 2004-07-29 Erich Neumayer Gmbh & Co Kg Verfahren zur Herstellung einer gebauten Welle und Vorrichtung zur Durchführung dieses Verfahrens
JP3787248B2 (ja) * 1999-09-30 2006-06-21 株式会社ジェイテクト 工作機械の定寸加工制御方法及びその装置
US6473964B1 (en) * 2000-01-12 2002-11-05 Keystone Investment Corporation Method of fabricating camshafts
US6932675B1 (en) * 2004-02-04 2005-08-23 General Motors Corporation Plated grinding wheel life maximization method
DE102004056802A1 (de) * 2004-11-24 2006-06-01 Naxos-Union Gmbh Schleifmaschine für wellenförmige Werkstücke

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013210403A1 (de) 2013-06-05 2014-12-11 Mahle International Gmbh Verfahren zur Herstellung einer Nockenwelle

Also Published As

Publication number Publication date
WO2003027446A1 (fr) 2003-04-03
DE50210565D1 (de) 2007-09-06
US20040244528A1 (en) 2004-12-09
ATE368174T1 (de) 2007-08-15
EP1432890A1 (fr) 2004-06-30
ES2288557T3 (es) 2008-01-16

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