EP1516107A1 - Fixation d'un tourillon - Google Patents

Fixation d'un tourillon

Info

Publication number
EP1516107A1
EP1516107A1 EP03761465A EP03761465A EP1516107A1 EP 1516107 A1 EP1516107 A1 EP 1516107A1 EP 03761465 A EP03761465 A EP 03761465A EP 03761465 A EP03761465 A EP 03761465A EP 1516107 A1 EP1516107 A1 EP 1516107A1
Authority
EP
European Patent Office
Prior art keywords
bolt
hardness
hrc
pin
induction hardening
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.)
Granted
Application number
EP03761465A
Other languages
German (de)
English (en)
Other versions
EP1516107B1 (fr
Inventor
Joseph Griffin
Marion Ince
Charles Schwab
Eric Nelson
Richard Carpenter
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.)
IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
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
Application filed by INA Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1516107A1 publication Critical patent/EP1516107A1/fr
Application granted granted Critical
Publication of EP1516107B1 publication Critical patent/EP1516107B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • F01L2305/02—Mounting of rollers

Definitions

  • the invention relates to the fixing of a bearing pin in a receiving bore of a housing which can be caulked at least at one end to the bore to achieve a positive and / or positive connection, the bolt having a lateral surface with a hardness that is greater than the hardness of its end faces is.
  • Such a bolt for mounting the roller of a rocker arm acted upon by a cam is previously known from US Pat. No. 5,054,440.
  • This rocker arm has a fork-shaped section, the two cheeks of which each have a receiving bore through which the bearing pin is guided. It carries a roller supported by needles, which is acted upon by a cam.
  • the bolt is held in the receiving bore by caulking, that is to say it is acted upon on one or both end faces with a corresponding tool, so that part of its material is displaced in the radial direction into the receiving bore.
  • the object of the invention is therefore to develop a bearing pin which has a long service life even under high load conditions.
  • this object is achieved according to the characterizing part of claim 1 in conjunction with its preamble in that the entire bolt is carbonitrided, quenched and tempered, so that a hardness of HV 745-950 (HRC 62-68) is realized, then the thus treated bolts for setting a hardness of HV 212-305 (HRB 93-HRC 30) are soft-annealed before the outer surface is subjected to induction hardening to set a final hardness of HV 745-950 (HRC 62-68).
  • the advantage of such a bolt produced in the manner according to the invention is that there is an increased hardness and a higher residual compressive stress in the raceway area, so that the bolt has increased wear and fatigue strength in this area, with soft end faces at the same time.
  • Carbonitriding is known to the person skilled in the art as a thermochemical method for treating a workpiece in the austenitic state with the purpose of enriching the surface layer with carbon and nitrogen, both elements subsequently being in solid solution in the austenite. This treatment is immediately followed by quenching with the goal of achieving hardening.
  • carbonitriding realizes a specific layer structure in the form of a connecting layer and a diffusion layer underneath. While the connection layer is decisive for all the workpiece properties that are related to the effects on the immediate surface, i.e. the wear behavior and the corrosion resistance, the mechanical properties of the workpieces, the fatigue strength and the tensile strength relate to the diffusion layer.
  • tempering takes place.
  • internal stresses are relieved, so that hardness and strength decrease, while toughness and ductility increase.
  • soft annealing of the carbonitrided, quenched and tempered stud to set the hardness values HV 212-305 (HRB 93-HRC 30), which are the hardness values for the two ends of the stud.
  • This soft annealing is used in particular to improve the deformability of the bolt, so that it can be easily plastically deformed in its end regions and thus can be caulked to a receiving bore in a simple manner.
  • the annealing temperatures depend on the material used and are between 650 and 700 ° C for steel.
  • the purpose of soft annealing is to give the steel a structure that is suitable for hardening and to convert it to a soft, easily machinable state.
  • Induction hardening is currently the most widespread thermal surface hardening process.
  • a magnetic alternating generated field that induces an alternating current in an electrically conductive workpiece (bolt) according to the transformer principle.
  • the direct conversion of the electrical energy into thermal energy via internal heat sources thus leads to the heating of the component, the energy transfer taking place without contact.
  • the heating is mainly limited to the boundary layer in which the internal heat sources are effective.
  • heat conduction leads to radially progressive heating of the component. It follows that the hardening depth can be adjusted with simple means and can always be adapted to the respective application without great effort.
  • the bolt should be solid or at least hollow in the section of its front ends.
  • the advantage of a hollow cylindrical bolt is that in addition to reducing the weight, the widening when caulking on its end faces is favored.
  • FIG. 1 shows a schematic side view of a valve train of an internal combustion engine
  • Figure 3 is an enlarged view of a bolt according to the invention.
  • the rocker arm 1 of a valve train of an internal combustion engine shown in FIG. 1 is pivotally mounted about its axis 2. At its right-hand end region, the rocker arm 1 is operatively connected to the shaft of the gas exchange valve 3, which is held in the closed position by the associated spring 4. At its left-hand end, the roller 5, which is in contact with the cam 7, is held in the rocker arm 1 via the pin 6. During its rotation, a pivoting movement of the rocker arm 1 about its axis 2 is triggered such that its left-hand part is moved up and its right-hand part is moved down, the gas exchange valve 3 opening.
  • the rocker arm 1 has a fork-shaped part with the cheeks 1.1, 1.2 spaced apart from one another at its left-hand end.
  • the aligned bore 1.3 extends through these cheeks 1.1, 1.2, in which the bolt 6 is arranged, which carries the roller 5 mounted on the roller ring 8.
  • the bolt 6 forms the inner raceway 6.1 for the rolling element ring 8 and is caulked on its two end faces 6.2 in the receiving bore 1.3 of the cheeks 1.1, 1.2 of the rocker arm 1.
  • the bearing pin 6 on the one hand must be soft on its end faces 6.2 in order to be able to be calked at all and on the other hand must have sufficient hardness in the raceway area 6.1 in order to be able to function as a resilient radial bearing.
  • the purpose of the soft annealing is on the one hand to give the steel a structure suitable for hardening and on the other hand to convert it to a soft, easily machinable state.
  • the stud has a hardness of HV 250, this hardness being the final hardness for its two end faces 6.2 at the same time.
  • This is finally followed by partial induction hardening of the lateral surface of the bolt 6 in a known manner, so that it has a final hardness of HV 800.
  • the pin 6 has the area 6.3, which serves as a raceway 6.1 for the rolling elements 8.
  • This area 6.3 contains the structure described in claim 2 after induction hardening, that is to say finely divided spherical carbides in a matrix of tempered martensite with a residual austenite content of 5-25%.
  • the transition area 6.4 of the bolt 6 separates the hardened area 6.3 from the soft end faces 6.2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

La présente invention concerne la fixation d'un tourillon (6) dans un alésage de réception (3) d'un boîtier qui peut être serré côté frontal au moins à une extrémité pour obtenir une liaison de force et/ou de forme avec l'alésage (1.3), le tourillon (6) présentant une surface latérale dont la dureté est supérieure à la dureté de ses extrémités frontales (6.2). Le tourillon (6) se caractérise en ce qu'il est carboné, trempé et recuit de sorte qu'on obtient tout d'abord une dureté de HV 745-950 (HRC 62-68), puis le tourillon ainsi traité (6) subit un recuit d'adoucissement pour régler la dureté à HV 212-305 (HRB 93- HRC 30), avant trempe par induction de la surface périphérique afin de régler la dureté finale à HV 745-950 (HRC 62-68). Un tourillon de ce type se caractérise par une longévité élevée même sous contraintes élevées.
EP03761465A 2002-06-27 2003-06-12 Fixation d'un tourillon Expired - Lifetime EP1516107B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US39181802P 2002-06-27 2002-06-27
US391818P 2002-06-27
PCT/EP2003/006277 WO2004003349A1 (fr) 2002-06-27 2003-06-12 Fixation d'un tourillon

Publications (2)

Publication Number Publication Date
EP1516107A1 true EP1516107A1 (fr) 2005-03-23
EP1516107B1 EP1516107B1 (fr) 2009-01-14

Family

ID=29780526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03761465A Expired - Lifetime EP1516107B1 (fr) 2002-06-27 2003-06-12 Fixation d'un tourillon

Country Status (8)

Country Link
US (1) US7377988B2 (fr)
EP (1) EP1516107B1 (fr)
KR (1) KR100927568B1 (fr)
CN (1) CN100359138C (fr)
AU (1) AU2003242704A1 (fr)
DE (2) DE10315416A1 (fr)
PL (1) PL202382B1 (fr)
WO (1) WO2004003349A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2345822B1 (fr) * 2004-08-02 2019-01-09 NTN Corporation Roulement pour culbuteur et culbuteur
US7563064B2 (en) * 2005-12-06 2009-07-21 Blount, Inc. Shear resistant rivet and saw chain
US7891279B2 (en) * 2005-12-06 2011-02-22 Blout, Inc. Shear resistant rivet and saw chain
DE102006054406B4 (de) * 2006-11-18 2016-09-15 Schaeffler Technologies AG & Co. KG Hubübertragungsbauteil und Verfahren zu dessen Herstellung
US20090173301A1 (en) * 2008-01-09 2009-07-09 Roller Bearing Company Of America, Inc Surface treated rocker arm shaft
DE102008017023A1 (de) * 2008-04-03 2009-10-08 Schaeffler Kg Bauteil für eine mit Alkoholkraftstoff betriebene Brennkraftmaschine
BR112012026018A2 (pt) * 2010-04-22 2016-06-28 Taiho Kogyo Co Ltd aparelho de mancal
DE102011103689A1 (de) * 2010-06-29 2011-12-29 Schaeffler Technologies Gmbh & Co. Kg Niet und Verfahren zum Vernieten von Bauteilen
DE102011004630A1 (de) * 2011-02-24 2012-08-30 Schaeffler Technologies Gmbh & Co. Kg Wälzkörper
DE102012205242A1 (de) 2012-03-30 2013-10-02 Schaeffler Technologies AG & Co. KG Wälzlagerbauteil
CN104995429A (zh) * 2013-02-27 2015-10-21 舍弗勒技术股份两合公司 行星小齿轮轴
DE102015204421A1 (de) * 2015-03-12 2016-04-21 Schaeffler Technologies AG & Co. KG Lagerbolzen für einen Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine und Verfahren zur Herstellung eines Lagerbolzens
EP3181838B1 (fr) * 2015-12-16 2019-10-23 Aktiebolaget SKF Procédé de fabrication d'une broche pour dispositif de galet à contre-came
US10077484B2 (en) 2016-10-28 2018-09-18 Schaeffler Technologies AG & Co. KG Method for producing a planetary gear shaft having increased hardness
DE102017119964A1 (de) * 2017-08-31 2019-02-28 Schaeffler Technologies AG & Co. KG Lagervorrichtung, Planetengetriebe mit einer Lagervorrichtung und Verfahren zur Herstellung und Montage eines Planetenbolzens
DE102017119965A1 (de) * 2017-08-31 2018-11-15 Schaeffler Technologies AG & Co. KG Lagervorrichtung
CN114198407B (zh) * 2021-12-15 2022-09-16 奇瑞汽车股份有限公司 发动机的轴承下盖和加工工艺方法、发动机

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303428A (fr) * 1969-04-10 1973-01-17
DE2106026A1 (de) * 1971-02-09 1972-08-17 Porsche Kg Zapfenbefestigung an einer Wandung
FR2241624A1 (en) * 1973-07-13 1975-03-21 Int Nickel Ltd Fabrication of articles in chromium steels - using spheroidised structure and formation of martensite after deformation
SE446646B (sv) * 1981-12-15 1986-09-29 Santrade Ltd Bergborrkrona och sett att tillverka denna
DD223166A1 (de) * 1984-04-18 1985-06-05 Maw Stahlgiesserei Wilhelm Pie Verfahren zum haerten eines chromgusseisenwerkstueckes
JPH0615811B2 (ja) * 1985-07-03 1994-03-02 本田技研工業株式会社 ロ−ラ付カムフォロア
US4816090A (en) * 1986-09-10 1989-03-28 The Broken Hill Proprietary Co., Ltd. Heat treated cold rolled steel strapping
US4921025A (en) * 1987-12-21 1990-05-01 Caterpillar Inc. Carburized low silicon steel article and process
JP2743488B2 (ja) * 1989-06-29 1998-04-22 日本精工株式会社 エンジンの動弁機構用カムフォロア装置
JPH04201128A (ja) * 1990-11-30 1992-07-22 Daido Steel Co Ltd 高面圧部品の製造方法
US5853502A (en) * 1995-08-11 1998-12-29 Sumitomo Metal Industries, Ltd. Carburizing steel and steel products manufactured making use of the carburizing steel
DE19612969B4 (de) * 1996-04-01 2004-04-08 Ina-Schaeffler Kg Verfahren zur Herstellung eines Kipp- oder Schlepphebels eines Ventiltriebs einer Brennkraftmaschine
FR2765890B1 (fr) * 1997-07-10 1999-08-20 Ascometal Sa Procede de fabrication d'une piece mecanique en acier cementee ou carbonitruree et acier pour la fabrication de cette piece
JP4423754B2 (ja) * 2000-06-22 2010-03-03 日本精工株式会社 転動軸の製造方法
JP2003056315A (ja) * 2001-08-22 2003-02-26 Ntn Corp ローラ付きカムフォロア
JP2003206708A (ja) * 2002-01-16 2003-07-25 Ntn Corp ローラ付きカムフォロア

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004003349A1 *

Also Published As

Publication number Publication date
AU2003242704A1 (en) 2004-01-19
KR100927568B1 (ko) 2009-11-23
EP1516107B1 (fr) 2009-01-14
US20040000280A1 (en) 2004-01-01
CN100359138C (zh) 2008-01-02
CN1662729A (zh) 2005-08-31
PL372840A1 (en) 2005-08-08
US7377988B2 (en) 2008-05-27
KR20050014008A (ko) 2005-02-05
DE10315416A1 (de) 2004-01-22
PL202382B1 (pl) 2009-06-30
WO2004003349A1 (fr) 2004-01-08
DE50311093D1 (de) 2009-03-05

Similar Documents

Publication Publication Date Title
EP1516107B1 (fr) Fixation d'un tourillon
DE10238252B4 (de) Nockenstößel mit Rolle
EP0494285B1 (fr) Assemblage d'un corps cylindrique fabrique a la cote exacte
DE10020118B4 (de) Wälzlagerbauteil
EP2045339B1 (fr) Pièce soumise à une usure par roulement en acier endurci et méthode de traitement thermique
DE3832441C2 (fr)
WO2010091938A1 (fr) Procédé de fabrication d'une chaîne de commande
DE102011113122A1 (de) Blattlager für eine Windkraftanlage sowie Verfahren zur Herstellung desselben
EP3228889B1 (fr) Élément de chemin de roulement pour un roulement de grande dimension et ensemble de palier
DE2742597B2 (de) Nockenwelle für Kolbenkraft- und -arbeitsmaschinen, vorzugsweise Hubkolben-Brennkraftmaschinen
DE602005000753T2 (de) Kipphebel und Methode seiner Herstellung
DE19612969B4 (de) Verfahren zur Herstellung eines Kipp- oder Schlepphebels eines Ventiltriebs einer Brennkraftmaschine
WO2008055477A2 (fr) Procédé de production d'une bague de roulement, et bague de roulement correspondante
WO1997036112A1 (fr) Materiau composite stratifie et procede permettant d'ameliorer la durete superficielle de materiaux composites stratifies
WO2005063442A1 (fr) Procede pour usiner des gorges sur des vilebrequins
EP1778991A1 (fr) Palier a roulements comprenant au moins un element realise par emboutissage de precision et dote d'une surface de roulement ou de guidage pour elements de roulement, procede pour fabriquer un element de ce type
DE102004028667A1 (de) Hebelartiger Nockenfolger
WO2006045461A1 (fr) Element palier ou positionneur en acier durci mecaniquement, pouvant etre soumis a des contraintes mecaniques
DE102005053047B3 (de) Bauteil und Verfahren zum Herstellen des Bauteils
DE102013213041A1 (de) Verfahren zur Verminderung einer White-etching-crack-Anfälligkeit von einem Lagerelement
DE102012203113A1 (de) Planeten-Wälz-Getriebespindel
EP1118783B1 (fr) Butée à billes
DE202020004103U1 (de) Bremshebel für eine Bremse eines Kraftfahrzeugs
DE102019120613A1 (de) Hebelartiger Nockenfolger und dessen Verwendung
DE202019102099U1 (de) Fliehkraftpendellagerrolle, Fliehkraftpendel mit Fliehkraftpendellagerrolle, sowie Kupplung mit Fliehkraftpendel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20041110

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHAEFFLER KG

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50311093

Country of ref document: DE

Date of ref document: 20090305

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20091015

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110407 AND 20110413

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311093

Country of ref document: DE

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE

Effective date: 20120828

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311093

Country of ref document: DE

Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE

Effective date: 20120828

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311093

Country of ref document: DE

Owner name: SCHAEFFLER TECHNOLOGIES AG CO. KG, DE

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG CO. KG, 91074 HERZOGENAURACH, DE

Effective date: 20140217

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311093

Country of ref document: DE

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE

Effective date: 20140217

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311093

Country of ref document: DE

Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE

Effective date: 20140217

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311093

Country of ref document: DE

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE

Effective date: 20150211

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20220627

Year of fee payment: 20

Ref country code: GB

Payment date: 20220622

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20220628

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20220624

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50311093

Country of ref document: DE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230523

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20230611

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20230611