EP1757892A1 - Système de garniture pour artillerie et son procédé de fabrication - Google Patents

Système de garniture pour artillerie et son procédé de fabrication Download PDF

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Publication number
EP1757892A1
EP1757892A1 EP06016080A EP06016080A EP1757892A1 EP 1757892 A1 EP1757892 A1 EP 1757892A1 EP 06016080 A EP06016080 A EP 06016080A EP 06016080 A EP06016080 A EP 06016080A EP 1757892 A1 EP1757892 A1 EP 1757892A1
Authority
EP
European Patent Office
Prior art keywords
nitriding
thick
iron
layer
oxide layer
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
EP06016080A
Other languages
German (de)
English (en)
Other versions
EP1757892B1 (fr
Inventor
Gert Schlenkert
Helmut Isgen
Almuth Dr. Kessler
Klaus-Achim Dr. Kratzsch
Horst Reckeweg
Henning Von Seidlitz
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.)
Rheinmetall Waffe Munition GmbH
Original Assignee
Rheinmetall Waffe Munition 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
Application filed by Rheinmetall Waffe Munition GmbH filed Critical Rheinmetall Waffe Munition GmbH
Publication of EP1757892A1 publication Critical patent/EP1757892A1/fr
Application granted granted Critical
Publication of EP1757892B1 publication Critical patent/EP1757892B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/74—Obturating or packing devices for gas leak prevention in breech mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/74—Obturating or packing devices for gas leak prevention in breech mechanisms
    • F41A3/76—Obturating or packing devices for gas leak prevention in breech mechanisms specially adapted for sealing the gap between the forward end of the cartridge chamber and the rearward end of the barrel, e.g. sealing devices for revolvers or revolver-type guns

Definitions

  • the invention relates to a Lid mecanicssystem for artillery weapons with the features specified in the preamble of claim 1.
  • the invention further relates to a method for producing such a Lid mecanicssystems.
  • An artillery weapon system for example, is from the DE 197 24 847 A1 known. It consists essentially of a bottom ring, a Lid mecanicsring and a closure insert and should ensure the rear side, the sealing of the gun barrel against the powder gases formed during firing. In view of the high loads occurring during firing the Lid mecanicssystemmaschine are usually made of steel.
  • the seal is made in artillery weapons by the Lider system for a variety of shots. Since the eyelid parts are directly exposed to the powder gases and residues, they are subject to high thermal, corrosive, abrasive and, in the case of blowers (i.e., pointy escape of the hot powder gases between the hoop ring and the closure insert), also erosive loads. Due to the powder gases and residues, the surfaces of the Lid mecanicssystemmaschine are strongly corrosive and abrasive attacked, so that relatively quickly results in a pitted surface structure on which the powder residues adhere well and promote the occurrence of blowers.
  • blowers i.e., pointy escape of the hot powder gases between the hoop ring and the closure insert
  • the invention has for its object to provide a Lid mecanicssystem for an artillery weapon, in which the surfaces of the Lid mecanicssystemmaschine are cost-effectively refined so that they are better protected against thermal, corrosive, abrasive and erosive loads than this in comparable known Lid mecanicssystem turnover the Case is. Furthermore, a method for producing such a Lid mecanicssystems be disclosed.
  • the invention is based essentially on the idea, not as in the DE 197 24 847 A1 proposed to coat the surfaces of the Lid mecanicssystemmaschine by means of hard materials, but to subject the surface of a nitration or carbonitriding and subsequent oxidation, such that the surface side results in a completely closed 1-3 ⁇ m thick iron oxide layer, which is used as a connecting layer into the interior
  • the respective Lid mecanicssystem learners extending 10-15 micron thick iron nitride layer or Eisencarbonitridtik connects.
  • Such an eyelid system according to the invention has, inter alia, the advantages that it works reliably and a change, e.g. the closure insert plate and the bottom ring, much less required by appropriately trained personnel than in known Lid fürssystemen. Apart from a good corrosion protection can be achieved with the eyelid system according to the invention over known systems improved wear protection and easier cleaning of the treated system parts.
  • the inventive method also does not change the core material, but only the near-surface region to a depth of 0.2 to 0.3 mm. Furthermore, process-related changes in geometry are reproducible and can be taken into account in the design.
  • the nitriding / nitrocarburizing of the surface of the Lid mecanicserss can preferably be done by means of plasma nitriding.
  • nitriding and oxidation should be chosen at temperatures below the last tempering temperature.
  • Fig. 1 the portion of a Lidansssystems is reproduced for a gun barrel, as he essentially from the DE 197 24 847 A1 known and shown there in Fig.2.
  • 1 denotes a closure insert of a closure wedge. This forms the contact surface for a right-angled Lid mecanicsring 2, which is mounted in a recess 3 of a bottom ring 4, which in turn is connected to the gun barrel, not shown.
  • the closure insert 1, the Lid mecanicsring 2 and the bottom ring 4 on their in the intended use of the gun barrel the powder gases facing surfaces each have a completely closed 1-3 micron thick iron oxide layer 5 ( Figure 2), to which one in the interior of the respective Lid mecanicssystemers 1, 2 and 4 extending 10-15 ⁇ m thick iron nitride layer 6 connects.
  • Figure 2 the surface hardness of the eyelid system parts 1, 2 and 4 is considerably increased by the iron nitride layer 6 and the sealing system is more stable with respect to mechanical loads than with known systems.
  • the iron oxide layer (Fe 3 O 4 ) 5 causes an improvement in the corrosion resistance of the Lid mecanicssystemmaschine 1, 2 and 4.
  • an oxidation takes place in a nitrogen-water vapor mixture in a temperature range between 480 ° C to 520 ° C.
  • the invention is not limited to the embodiment described above.
  • an iron carbonitride layer may also be used.
  • the enrichment of the near-surface layer with nitrogen and an enrichment with carbon must be made.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Fertilizers (AREA)
  • Glass Compositions (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP06016080A 2005-08-24 2006-08-02 Système de garniture pour artillerie et son procédé de fabrication Not-in-force EP1757892B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005039899A DE102005039899A1 (de) 2005-08-24 2005-08-24 Liderungssystem für Artilleriewaffen und Verfahren zu seiner Herstellung

Publications (2)

Publication Number Publication Date
EP1757892A1 true EP1757892A1 (fr) 2007-02-28
EP1757892B1 EP1757892B1 (fr) 2008-03-19

Family

ID=37440282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06016080A Not-in-force EP1757892B1 (fr) 2005-08-24 2006-08-02 Système de garniture pour artillerie et son procédé de fabrication

Country Status (3)

Country Link
EP (1) EP1757892B1 (fr)
AT (1) ATE389861T1 (fr)
DE (2) DE102005039899A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119476A1 (fr) * 2007-04-02 2008-10-09 Rheinmetall Waffe Munition Gmbh Garniture de canons à barillet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0753599A1 (fr) * 1995-07-11 1997-01-15 METAPLAS IONON Oberflächenveredelungstechnik GmbH Procédé et appareil pour l'obtention de revêtements résistant à la corrosion et l'usure sur des substrats à base de fer
GB2326222A (en) * 1997-06-12 1998-12-16 Rheinmetall Ind Ag Obturation system for artillery weapons

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0753599A1 (fr) * 1995-07-11 1997-01-15 METAPLAS IONON Oberflächenveredelungstechnik GmbH Procédé et appareil pour l'obtention de revêtements résistant à la corrosion et l'usure sur des substrats à base de fer
EP0753599B1 (fr) 1995-07-11 1999-04-07 METAPLAS IONON Oberflächenveredelungstechnik GmbH Procédé pour l'obtention de revêtements résistant à la corrosion et l'usure sur des substrats à base de fer
GB2326222A (en) * 1997-06-12 1998-12-16 Rheinmetall Ind Ag Obturation system for artillery weapons
DE19724847A1 (de) 1997-06-12 1998-12-24 Rheinmetall W & M Gmbh Liderungssystem für Artilleriewaffen und Verfahren zu seiner Herstellung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119476A1 (fr) * 2007-04-02 2008-10-09 Rheinmetall Waffe Munition Gmbh Garniture de canons à barillet
US8459166B2 (en) 2007-04-02 2013-06-11 Rheinmetall Waffe Munition Gmbh Obturation of drum cannons

Also Published As

Publication number Publication date
DE502006000488D1 (de) 2008-04-30
ATE389861T1 (de) 2008-04-15
EP1757892B1 (fr) 2008-03-19
DE102005039899A1 (de) 2007-03-08

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