FR2437489A1 - Valve push rod for IC engine - is steel tube welded to case hardened end piece which has flat proximal and curved distal surfaces - Google Patents

Valve push rod for IC engine - is steel tube welded to case hardened end piece which has flat proximal and curved distal surfaces

Info

Publication number
FR2437489A1
FR2437489A1 FR7827946A FR7827946A FR2437489A1 FR 2437489 A1 FR2437489 A1 FR 2437489A1 FR 7827946 A FR7827946 A FR 7827946A FR 7827946 A FR7827946 A FR 7827946A FR 2437489 A1 FR2437489 A1 FR 2437489A1
Authority
FR
France
Prior art keywords
engine
steel tube
end piece
valve push
push rod
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
FR7827946A
Other languages
French (fr)
Other versions
FR2437489B1 (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.)
Usui Kokusai Sangyo Kaisha Ltd
Original Assignee
Usui Kokusai Sangyo Kaisha Ltd
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 Usui Kokusai Sangyo Kaisha Ltd filed Critical Usui Kokusai Sangyo Kaisha Ltd
Priority to FR7827946A priority Critical patent/FR2437489A1/en
Publication of FR2437489A1 publication Critical patent/FR2437489A1/en
Application granted granted Critical
Publication of FR2437489B1 publication Critical patent/FR2437489B1/fr
Granted 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
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The valve push-rod for an IC engine if formed by electric resistance welding a case-hardened end piece (2) on the end of a steel tube (1) and controlling the rate of cooling following cessation of the welding current. This may be effected by heating the weld zone so as to form a transition layer comprising a mixed alpha-martensite and primary troostite structure. This bridges the annular weld zone boundary around the tube wall in the region of the end of its base. The heating current is applied simultaneously with cessation of the welding current.
FR7827946A 1978-09-29 1978-09-29 Valve push rod for IC engine - is steel tube welded to case hardened end piece which has flat proximal and curved distal surfaces Granted FR2437489A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7827946A FR2437489A1 (en) 1978-09-29 1978-09-29 Valve push rod for IC engine - is steel tube welded to case hardened end piece which has flat proximal and curved distal surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7827946A FR2437489A1 (en) 1978-09-29 1978-09-29 Valve push rod for IC engine - is steel tube welded to case hardened end piece which has flat proximal and curved distal surfaces

Publications (2)

Publication Number Publication Date
FR2437489A1 true FR2437489A1 (en) 1980-04-25
FR2437489B1 FR2437489B1 (en) 1982-04-02

Family

ID=9213191

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7827946A Granted FR2437489A1 (en) 1978-09-29 1978-09-29 Valve push rod for IC engine - is steel tube welded to case hardened end piece which has flat proximal and curved distal surfaces

Country Status (1)

Country Link
FR (1) FR2437489A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1279500A (en) * 1960-11-10 1961-12-22 Bundy Tubing Co Rocker arm, in particular for timing mechanism of internal combustion engine
US3660629A (en) * 1970-01-02 1972-05-02 Hitachi Shipbuilding Eng Co Method and device for welding high tensile strength steel of higher strength
US4079224A (en) * 1974-11-05 1978-03-14 Nippon Steel Corporation Method for preventing brittle fracture of steel pipe structures

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1279500A (en) * 1960-11-10 1961-12-22 Bundy Tubing Co Rocker arm, in particular for timing mechanism of internal combustion engine
US3660629A (en) * 1970-01-02 1972-05-02 Hitachi Shipbuilding Eng Co Method and device for welding high tensile strength steel of higher strength
US4079224A (en) * 1974-11-05 1978-03-14 Nippon Steel Corporation Method for preventing brittle fracture of steel pipe structures

Also Published As

Publication number Publication date
FR2437489B1 (en) 1982-04-02

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Legal Events

Date Code Title Description
ST Notification of lapse