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GB2004613A - Camshaft - Google Patents

Camshaft

Info

Publication number
GB2004613A
GB2004613A GB7837700A GB7837700A GB2004613A GB 2004613 A GB2004613 A GB 2004613A GB 7837700 A GB7837700 A GB 7837700A GB 7837700 A GB7837700 A GB 7837700A GB 2004613 A GB2004613 A GB 2004613A
Authority
GB
United Kingdom
Prior art keywords
cam
hardened
edge zones
camshaft
detracting
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
GB7837700A
Other versions
GB2004613B (en
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.)
Audi AG
Original Assignee
Audi NSU Auto Union AG
Audi 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
Application filed by Audi NSU Auto Union AG, Audi AG filed Critical Audi NSU Auto Union AG
Publication of GB2004613A publication Critical patent/GB2004613A/en
Application granted granted Critical
Publication of GB2004613B publication Critical patent/GB2004613B/en
Expired legal-status Critical Current

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 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Gears, Cams (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

A camshaft 1, e.g. of grey cast iron, has its cam surfaces hardened e.g. by melting along tracks 3 as by T.I.G. or electron beam heating. The edge zones are left unhardened, only the intermediate zone, e.g. two thirds the cam width, being hardened.The relative softness of the edge zones shortens the running in period in that stress peaks at the edges are obviated, whilst yet not detracting from wear resistance of the cam surface as a whole. <IMAGE>
GB7837700A 1977-09-22 1978-09-21 Camshaft Expired GB2004613B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2742597A DE2742597C3 (en) 1977-09-22 1977-09-22 Camshaft for piston engines and work machines, preferably reciprocating internal combustion engines

Publications (2)

Publication Number Publication Date
GB2004613A true GB2004613A (en) 1979-04-04
GB2004613B GB2004613B (en) 1982-02-24

Family

ID=6019581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7837700A Expired GB2004613B (en) 1977-09-22 1978-09-21 Camshaft

Country Status (5)

Country Link
JP (1) JPS5457010A (en)
DE (1) DE2742597C3 (en)
FR (1) FR2404104A1 (en)
GB (1) GB2004613B (en)
IT (1) IT1099150B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131458A (en) * 1982-12-09 1984-06-20 Zentralinstitut Schweiss A method for local treatment by melting
FR2560090A1 (en) * 1984-02-24 1985-08-30 Honda Motor Co Ltd CAST IRON ARTICLE AND METHOD FOR MANUFACTURING THE SAME
EP0060257B1 (en) * 1980-09-11 1985-10-02 Sciaky Bros., Inc. Method for surface hardening cams
US4661676A (en) * 1985-03-01 1987-04-28 Toyota Jidosha Kabushiki Kaisha Process for producing camshaft with cams subjected to remelting chilling treatment
US4686349A (en) * 1984-06-22 1987-08-11 Mitsubishi Denki Kabushiki Kaisha Apparatus for improving surface quality of rotary machine parts
US4761192A (en) * 1984-03-07 1988-08-02 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for remelting and hardening a shaft

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5850354A (en) * 1981-09-07 1983-03-24 Toyota Motor Corp Cam shaft made of spherical graphite cast iron
JPS58196362A (en) * 1982-05-10 1983-11-15 Toyota Motor Corp Cast iron cam shaft and manufacture
JPS5923156A (en) * 1982-07-28 1984-02-06 Toyota Motor Corp Cast-iron cam shaft and manufacture thereof
JPS5923814A (en) * 1982-07-28 1984-02-07 Toyota Motor Corp Method for fining partial metallic carbide of metallic member
DE3231774C1 (en) * 1982-08-26 1983-04-07 Aeg-Elotherm Gmbh, 5630 Remscheid Device for cooling the edges during remelt hardening of cam followers
DE3444901A1 (en) * 1984-12-08 1986-06-12 Audi AG, 8070 Ingolstadt Cam control
JPS6213521A (en) * 1985-07-09 1987-01-22 Honda Motor Co Ltd Wear-resistant member and its manufacturing method
DE4224264C1 (en) * 1992-07-23 1993-06-09 Aeg-Elotherm Gmbh, 5630 Remscheid, De Remelting of workpiece surface - by reducing carbon@ content in parts where remelting will not occur and directing an arc, electron, plasma or laser beam onto the surface
DE102010038679A1 (en) 2010-07-30 2012-02-02 Robert Bosch Gmbh Cam shaft for high pressure pump of common-rail fuel injection system of internal combustion engine, has cam comprising sliding friction coefficient, which is larger than detention friction coefficient of roller opposite to roller shoe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1082461B (en) * 1957-12-12 1960-05-25 Maybach Motorenbau Gmbh Shaft, especially camshaft
JPS4527442Y1 (en) * 1969-08-08 1970-10-23

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060257B1 (en) * 1980-09-11 1985-10-02 Sciaky Bros., Inc. Method for surface hardening cams
GB2131458A (en) * 1982-12-09 1984-06-20 Zentralinstitut Schweiss A method for local treatment by melting
FR2560090A1 (en) * 1984-02-24 1985-08-30 Honda Motor Co Ltd CAST IRON ARTICLE AND METHOD FOR MANUFACTURING THE SAME
US4761192A (en) * 1984-03-07 1988-08-02 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for remelting and hardening a shaft
US4686349A (en) * 1984-06-22 1987-08-11 Mitsubishi Denki Kabushiki Kaisha Apparatus for improving surface quality of rotary machine parts
US4661676A (en) * 1985-03-01 1987-04-28 Toyota Jidosha Kabushiki Kaisha Process for producing camshaft with cams subjected to remelting chilling treatment

Also Published As

Publication number Publication date
DE2742597C3 (en) 1980-02-07
FR2404104A1 (en) 1979-04-20
DE2742597A1 (en) 1979-03-29
FR2404104B1 (en) 1985-04-19
JPS5457010A (en) 1979-05-08
DE2742597B2 (en) 1979-05-31
JPS5740323B2 (en) 1982-08-26
GB2004613B (en) 1982-02-24
IT7827944A0 (en) 1978-09-21
IT1099150B (en) 1985-09-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950921