EP0066004A1 - Poussoir de soupape - Google Patents

Poussoir de soupape Download PDF

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Publication number
EP0066004A1
EP0066004A1 EP81105521A EP81105521A EP0066004A1 EP 0066004 A1 EP0066004 A1 EP 0066004A1 EP 81105521 A EP81105521 A EP 81105521A EP 81105521 A EP81105521 A EP 81105521A EP 0066004 A1 EP0066004 A1 EP 0066004A1
Authority
EP
European Patent Office
Prior art keywords
ring zone
soldering
shielding element
welding
valve tappet
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
EP81105521A
Other languages
German (de)
English (en)
Other versions
EP0066004B1 (fr
Inventor
Kurt Wizemann
Manfred Ing. Grad. Pfiz
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.)
J Wizemann & Co GmbH
Original Assignee
J Wizemann & Co GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6133441&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0066004(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by J Wizemann & Co GmbH filed Critical J Wizemann & Co GmbH
Priority to AT81105521T priority Critical patent/ATE19289T1/de
Publication of EP0066004A1 publication Critical patent/EP0066004A1/fr
Application granted granted Critical
Publication of EP0066004B1 publication Critical patent/EP0066004B1/fr
Expired 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods

Definitions

  • the invention relates to a valve lifter with a hollow shaft and a base piece which has a running surface and which are connected to one another along an annular zone by welding or soldering by means of an energy beam.
  • the invention further relates to a method for producing such a valve tappet. Any beam which is sufficiently energy-rich for welding or soldering and which can be produced with a defined cross-section can be considered as an energy beam; in particular, however, an electron or laser beam is used.
  • Electron beam welded valve lifters of the type described above are known from DE-PS 27 03 015.
  • the invention was therefore based on the object of demonstrating a way in which valve tappets with a hollow shaft and a bottom piece connected to it in a material-locking manner can be produced if the shaft and bottom piece cannot be connected to one another by more conventional methods, such as friction welding, because of the material pairing to be taken, whereby however at the same time the disadvantages of connecting with the aid of an energy beam described above should be avoidable.
  • This object can be achieved with welding or soldering by means of an energy beam, in particular with electron beam or laser welding, according to the invention by arranging a shielding element inside the plunger, which is connected between each area of the ring zone, along which shaft and base piece are connected, and the this diametrically opposite ring zone area. It is only important that this shielding element prevents the energy beam penetrating the ram shaft wall from damaging the opposite ram area at the moment of welding or soldering, i. H.
  • the procedure is such that at least during welding or soldering, a shielding element is arranged inside the plunger, which is at least always between the instantaneous welding or soldering point and the opposite ring zone area and thus prevents the energy beam from acting on this opposite ring zone area.
  • a shielding element With valve tappets open at the top, one could think of inserting a shielding element into the valve tappet and removing it again after the welding or soldering process has ended; the shielding element could also be part of the shaft or base piece or have the shape of a veritable small screen which, together with the energy beam source, is rotated relative to the valve stem.
  • the shielding element is in the form of a ring covering the ring zone from the inside, it being possible for this to be welded or soldered to the actual valve tappet.
  • this pan can now be used at the same time as a shielding element, ie in other words, the shielding element is designed as a pan and expediently welded or soldered to the ring zone mentioned.
  • the shielding element can be inserted into the valve stem stem before the stem and base piece are assembled, it is possible and advisable to let the shielding element rest against the inner wall of the stem and to provide the latter with a shoulder that overlaps the shielding element and secures it in the axial direction that the shielding element is secured in the axial direction between the shoulder and the base piece.
  • the invention thus makes it possible to always work with such a high-energy beam that there is certainly an interface-free connection between the plunger shaft and the base piece, without the energy beam having to accept damage on the inside of the plunger shaft.
  • a valve tappet according to the invention is not as prone to cracking in the area of the connection as valve tappets of the type in question, which have been welded with a sharply focused energy beam. If it is ensured that the connection extends over the entire wall thickness of the tappet shaft, a definite ultrasound test of the valve tappet can also be carried out, because otherwise an ultrasound test cannot distinguish between a crack and a point at which the weld has not been completely welded through .
  • the invention is particularly suitable for valve tappets in which the tappet shaft consists of case-hardening steel and the base piece consists of tool steel or high-speed steel.
  • a metallic part is expediently used as the shielding element.
  • the invention is also suitable for valve tappets in which a particularly wear-resistant base piece consists of a ceramic material, in particular one of the known oxide ceramics.
  • a base piece can namely be connected to the shaft by soldering, expediently proceeding in such a way that the surface area of the base piece to be connected to the shaft is first coated with a thin metal layer by vapor deposition and then soldered to the shaft by means of an energy beam.
  • the first embodiment according to FIG. 1 has a shaft 10 which is closed at the top and is provided with a ball socket (not shown) for supporting a push rod.
  • the essentially circular cylindrical shaft wall 12 is placed on a likewise circular cylindrical extension 14 of a plate-shaped base piece 16 and welded to this extension along an annular ring zone 18.
  • a metallic protective ring 22 is inserted into the plunger cavity 20, which in particular likewise has the shape of a hollow circular cylinder and lies tightly against the inner peripheral surfaces of the shaft wall 12 and of the base piece attachment 14.
  • the inside of the shaft wall 12 forms an annular shoulder 26, between which and the base piece 16 the protective ring 22 is held in the axial direction.
  • the base piece 16 forms a tread 30 for a cam (not shown), this base piece must be as wear-resistant as possible, which is why it preferably consists of a tool or high-speed steel. On the other hand, for reasons of cost, it is advisable to produce the shaft 10 from case hardening steel using the cold extrusion process.
  • the protective ring 22 is inserted into the base piece 16 and then the stem 10 is pushed on.
  • the parts then pass through an electron-steel welding device which is provided with a lock in front of the actual welding station in order to be able to bring the parts into a vacuum for the welding process.
  • a Electron beam 40 is directed in the radial direction onto the ring zone 18, whereupon the valve lifter and the electron beam are rotated relative to one another about the longitudinal axis of the plunger such that the electron beam 40 runs around the plunger.
  • the energy of the electron beam 40 is chosen so large that it completely penetrates the shaft wall 12 or the extension 14, but not twice the wall thickness of the protective ring 22, so that no damage to the ring zone 18 can occur in the area of the welding is currently being machined welded. In this way, not only is the ring zone 18 welded through, but the protective ring 22 is also welded to the shaft 10 or the base piece 16.
  • the embodiment according to FIG. 2 has a shaft 10 'which is open at the top and differs from the embodiment according to FIG. 1 in that a ball socket 22' was used as the shielding element, which in the same way as the protective ring 22 in the embodiment according to FIG. 1 held between the shaft 10 'and a base piece 16' and when the two parts 10 ', 16' are welded along an annular zone 18 'in the region of this annular zone, the two parts 10', 16 'are welded.
  • a base piece 16 "to be connected to a hollow shaft 10 ′′ is to consist of an oxide ceramic which is distinguished by great wear resistance.
  • a cylindrical extension 14" of the base piece is at least in the area of its upper end face Vapor deposition has been provided with a metal layer 52 ", so that by inserting a solder foil 50"
  • damage to the soldered connection is in which the mo to avoid - mentanen solder opposite area "is inserted, which is characterized by inserting a brazing sheet 54 ', a protective ring 22 can be at least with the shaft wall 12" connect.
  • the shielding element can serve as a centering piece when assembling the shaft and base piece before welding.
  • the wall thickness of the shielding element must of course be chosen depending on the material used so that it does its job, i. H. can prevent the selected energy beam from causing damage at the point opposite the current welding or soldering point.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)
  • Magnetically Actuated Valves (AREA)
EP81105521A 1981-05-29 1981-07-14 Poussoir de soupape Expired EP0066004B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105521T ATE19289T1 (de) 1981-05-29 1981-07-14 Ventilstoessel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3121296 1981-05-29
DE19813121296 DE3121296A1 (de) 1981-05-29 1981-05-29 Ventilstoessel und verfahren zu seiner herstellung

Publications (2)

Publication Number Publication Date
EP0066004A1 true EP0066004A1 (fr) 1982-12-08
EP0066004B1 EP0066004B1 (fr) 1986-04-16

Family

ID=6133441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105521A Expired EP0066004B1 (fr) 1981-05-29 1981-07-14 Poussoir de soupape

Country Status (3)

Country Link
EP (1) EP0066004B1 (fr)
AT (1) ATE19289T1 (fr)
DE (2) DE3121296A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434529A1 (de) * 1983-10-21 1985-07-25 J. Wizemann Gmbh U. Co, 7000 Stuttgart Verfahren zur herstellung eines metallischen verbundgegenstands
FR2651452A1 (fr) * 1989-09-06 1991-03-08 Daimler Benz Ag Procede de fabrication d'une soupape.
US6762555B1 (en) 1998-06-01 2004-07-13 Hamamatsu Photonics K.K. Photomultiplier tube and radiation detector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07652Y2 (ja) * 1988-07-13 1995-01-11 富士バルブ株式会社 油圧式バルブラッシュアジャスタ
JPH072967Y2 (ja) * 1988-09-30 1995-01-30 富士バルブ株式会社 油圧式バルブラッシュアジャスタ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR750796A (fr) * 1932-02-20 1933-08-18 Sulzer Ag Procédé de jonction de tubes par soudure
DE2526656A1 (de) * 1975-06-14 1976-12-23 Wizemann & Co J Ventilstoessel
FR2378600A1 (fr) * 1977-01-26 1978-08-25 Wizemann Gmbh & Co J Procede de fabrication d'un poussoir de soupage
US4279655A (en) * 1979-01-04 1981-07-21 Garvie Ronald C Partially stabilized zirconia ceramics

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR750796A (fr) * 1932-02-20 1933-08-18 Sulzer Ag Procédé de jonction de tubes par soudure
DE2526656A1 (de) * 1975-06-14 1976-12-23 Wizemann & Co J Ventilstoessel
FR2378600A1 (fr) * 1977-01-26 1978-08-25 Wizemann Gmbh & Co J Procede de fabrication d'un poussoir de soupage
US4279655A (en) * 1979-01-04 1981-07-21 Garvie Ronald C Partially stabilized zirconia ceramics

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434529A1 (de) * 1983-10-21 1985-07-25 J. Wizemann Gmbh U. Co, 7000 Stuttgart Verfahren zur herstellung eines metallischen verbundgegenstands
FR2651452A1 (fr) * 1989-09-06 1991-03-08 Daimler Benz Ag Procede de fabrication d'une soupape.
US6762555B1 (en) 1998-06-01 2004-07-13 Hamamatsu Photonics K.K. Photomultiplier tube and radiation detector

Also Published As

Publication number Publication date
DE3121296A1 (de) 1982-12-23
DE3174394D1 (de) 1986-05-22
ATE19289T1 (de) 1986-05-15
EP0066004B1 (fr) 1986-04-16

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