RO93037B1 - Process and device for crimping tubular rod of sodium-filled discharge valves - Google Patents

Process and device for crimping tubular rod of sodium-filled discharge valves

Info

Publication number
RO93037B1
RO93037B1 RO119953A RO11995385A RO93037B1 RO 93037 B1 RO93037 B1 RO 93037B1 RO 119953 A RO119953 A RO 119953A RO 11995385 A RO11995385 A RO 11995385A RO 93037 B1 RO93037 B1 RO 93037B1
Authority
RO
Romania
Prior art keywords
crimping
valve
valve stem
sodium
phase
Prior art date
Application number
RO119953A
Other languages
Romanian (ro)
Other versions
RO93037A2 (en
Inventor
Virgil Gardus
Stefan Ardeleanu
Original Assignee
îNTREPRINDEREA "23 AUGUST"
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 îNTREPRINDEREA "23 AUGUST" filed Critical îNTREPRINDEREA "23 AUGUST"
Priority to RO119953A priority Critical patent/RO93037B1/en
Publication of RO93037A2 publication Critical patent/RO93037A2/en
Publication of RO93037B1 publication Critical patent/RO93037B1/en

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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/12—Cooling of valves
    • F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)

Abstract

Inventia se refera la un procedeu si la un dispozitiv pentru sertizarea tijei tubulare a supapelor de evacuare umplute cu sodiu, destinate utilarii motoarelor termice. Prin procedeul conform inventiei, într-o prima faza se prelucreaza zona de sertizare la capatul tijei tubulare a supapei cu un profil exterior îngropat, dupa introducerea barei de sodiu în interiorul tijei supapei cu supapa mentinuta vertical; în a doua faza, se încalzeste prin inductie pîna la temperatura de forjare corespunzatorotelului respectiv, iar în a treia faza, fara a-i schimba pozitia verticala supapei, se efectueaza rapid sertizarea prin exercitarea unor presiuni exterioare radiale, concomitent cu o forta axiala, astfel ca deformarea sa se produca mai mult în dire ctia radiala decît axiala, acesta pîna la disparitia gaurii centrale din tija supapei în zona de sertizare. Dispozitivul, conform inventiei, este constituit dintr-o placa interioara care se fixeaza supapa si o placa superioara pe care sunt montate patru role profilate, întreg dispozitivul fiind montat pe o presa cu excentric, la cursa de coborîre, rolele profilate realizînd radial deformarea plastica a tijei de supapa în zona de sertizare.The invention relates to a process and a device for crimping the hollow shaft of the exhaust valves filled with sodium, intended for the use of thermal motors. By the process of the invention, in a first step, the crimping area is machined at the end of the tubular valve stem with a buried outer profile, after insertion of the sodium bar into the valve stem with the valve held vertically; In the second phase, it is heated by induction to the forging temperature of the respective chamber, and in the third phase, without changing the vertical position of the valve, rapid crimping is carried out by exerting some radial outer pressure, simultaneously with an axial force, so that the deformation to produce more in the radial direction than axial, until the central hole in the valve stem disappears into the crimping area. The device according to the invention consists of an inner plate that fixes the valve and a top plate on which are mounted four profiled rollers, the whole device being mounted on an eccentric press at the lowering stroke, the profiled rollers making the plastic deformation of the valve stem in the crimping area.

RO119953A 1985-08-27 1985-08-27 Process and device for crimping tubular rod of sodium-filled discharge valves RO93037B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO119953A RO93037B1 (en) 1985-08-27 1985-08-27 Process and device for crimping tubular rod of sodium-filled discharge valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO119953A RO93037B1 (en) 1985-08-27 1985-08-27 Process and device for crimping tubular rod of sodium-filled discharge valves

Publications (2)

Publication Number Publication Date
RO93037A2 RO93037A2 (en) 1987-12-31
RO93037B1 true RO93037B1 (en) 1988-01-01

Family

ID=20117848

Family Applications (1)

Application Number Title Priority Date Filing Date
RO119953A RO93037B1 (en) 1985-08-27 1985-08-27 Process and device for crimping tubular rod of sodium-filled discharge valves

Country Status (1)

Country Link
RO (1) RO93037B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011179327A (en) * 2010-02-26 2011-09-15 Mitsubishi Heavy Ind Ltd Method for manufacturing metal sodium-sealed engine valve

Also Published As

Publication number Publication date
RO93037A2 (en) 1987-12-31

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