EP0908264B1 - Apparatus for hardening the internal contour of a gun barrel with laser beam - Google Patents

Apparatus for hardening the internal contour of a gun barrel with laser beam Download PDF

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Publication number
EP0908264B1
EP0908264B1 EP98116447A EP98116447A EP0908264B1 EP 0908264 B1 EP0908264 B1 EP 0908264B1 EP 98116447 A EP98116447 A EP 98116447A EP 98116447 A EP98116447 A EP 98116447A EP 0908264 B1 EP0908264 B1 EP 0908264B1
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EP
European Patent Office
Prior art keywords
laser
gun barrel
laser head
optics
hardening
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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.)
Expired - Lifetime
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EP98116447A
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German (de)
French (fr)
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EP0908264A1 (en
Inventor
Herbert Manz
Haluk Tuncer
Manfred Zaeper
Harald Weismüller
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Rheinmetall W&M GmbH
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Rheinmetall W&M GmbH
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    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/10—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes shotgun barrels
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/12—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes barrels for ordnance
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation

Definitions

  • the invention relates to a device for hardening the inner contour of a weapon barrel with laser radiation.
  • the weapon barrel which is usually made of steel, with a hard metal layer, e.g. one Chrome layer or a chromium-containing alloy layer (e.g. a cobalt-chromium-tungsten alloy), to provide.
  • a hard metal layer e.g. one Chrome layer or a chromium-containing alloy layer (e.g. a cobalt-chromium-tungsten alloy)
  • a disadvantage of such gun barrels is that the application of the application layer is process-technical is relatively complex and often flaking and washing out of this layer occur, which reduce the life of the gun barrels.
  • a disadvantage of this known laser arrangement is that the use of the CO 2 laser requires a relatively rigid beam guidance system, so that the processing space is limited. In addition, it cannot be deduced from this document how the relative movement required between the weapon barrel and the laser head could be realized.
  • a device is known, with the aid of which defective pipes a Pressurized water reactor can be repaired. This is done in the defective pipe area a sleeve is inserted into the respective tube and welded to the inner wall by means of laser light.
  • the known device comprises an Nd: YAG laser and one along the Tube axis which can be displaced and which contains a beam deflecting optics, which is connected to the laser via an optical fiber.
  • the laser head is on one Pipe centered and movable in the direction of the pipe axis attached pull rod.
  • the present invention has for its object a device for transformation hardening to specify the inner contour of a gun barrel with which the gun barrel is very precise and homogeneous can be hardened and with their intended use an enlargement of the processing space connected is.
  • the invention is based on the idea of using an ND: YAG laser as a laser, since glass fibers can be used for the transmission of the laser beam due to the shorter wavelength of 1.06 ⁇ m compared to CO 2 lasers.
  • the laser head is (supportable and therefore on the pipe walls) at a centerable in the weapon barrel by the attachment and egg ner program-controlled Keyseating maintained very exactly the focal position of the laser beam during the curing process in the direction of the bore axis of the weapon barrel displaceable draw rod.
  • the program-controlled grooving machine the drawbar can be pulled through the gun barrel in a program-controlled manner on a defined slide using a machine slide. The relative focus position of the laser beam always remains constant due to the bushings carried in the tube.
  • FIG. 1 shows the side view of a gun barrel to be hardened in connection with a laser system and a program-controlled groove drawing machine.
  • 1 designates the weapon barrel, which is aligned on the groove-pulling machine 2 and is fixed.
  • the pull rod 3 of the grooving machine extends within the weapon barrel 1 along the soul axis 4 and is supported on the inner surface 5 of the barrel 1 over two guide bushings 6 and 7.
  • a laser head 10 is arranged at the end 9 of the pull rod 3, which via an optical fiber 11 with an Nd: YAG laser 12 (e.g. with 2 kW output power).
  • the laser head 10 is via a first hose line 13 with a cooling device 14 and a second Hose line 15 with a protective gas source 16 (e.g. with Argon-filled gas bottle).
  • the laser head 10 essentially comprises a facet mirror 17, the laser beam coming from the optical fiber 11 on the inner surface 5 of the weapon barrel 1 to be hardened focused, and that due to the occurring in operation enormous heat generation by a coolant, which over the hose line 13 is supplied, can be cooled.
  • the laser head 10 is also with a second tube or Hose line 15 connected via a protective gas during transformation hardening on the heated surface of the barrel flows and a deteriorating surface quality Prevents oxide layer formation.
  • both drawn gun barrels as well as gun barrels with a smooth barrel profile transformation hardening are drawn gun barrels as well as gun barrels with a smooth barrel profile transformation hardening.
  • steel pipes go down to a depth of 0.4 to 0.8 mm let transformation hardening, the hardened surface areas had between 600 and 750 HV.
  • the invention comprises Device an electronic control device 18 with which the laser power is regulated and which one on the laser 12 downstream closure unit 19 acts and the correct operation of the laser system constantly monitored such that in the event of a defect, e.g. at a fiber break in the optical fiber or an interrupted one or insufficient cooling of the facet mirror etc., the The gun barrel interrupts the hardening process.
  • a defect e.g. at a fiber break in the optical fiber or an interrupted one or insufficient cooling of the facet mirror etc.
  • control device 18 is preferred connected to the control device 21 for the groove drawing machine.
  • this makes the flexible design of Machining cycles and on the other hand the monitoring of safety-related interlocks guaranteed.
  • a third pipe or hose line is provided be through the compressed air or nitrogen across the jet outlet of the laser head is passed through this directed gas flow, the mirror optics and the interior protect the laser head from dirt.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laser Beam Processing (AREA)
  • Heat Treatment Of Articles (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Härten der Innenkontur eines Waffenrohres mit Laserstrahlung.The invention relates to a device for hardening the inner contour of a weapon barrel with laser radiation.

Um die durch die heißen Treibladungsgase verursachte Erosion des jeweiligen Waffenrohres bzw. den durch die Reibung zwischen der Geschosse und dem Waffenrohr verursachten abrasiven Verschleiß gering zu halten und damit deren Lebensdauer zu erhöhen, ist es bekannt, die innere Oberfläche des in der Regel aus Stahl bestehenden Waffenrohres mit einer Hartmetallschicht, z.B. einer Chromschicht oder einer Chrom enthaltenden Legierungsschicht (z.B. einer Kobalt-Chrom-Wolfram-Legierung), zu versehen.In order to avoid the erosion of the respective gun barrel caused by the hot propellant gas or the abrasive wear caused by the friction between the projectiles and the weapon barrel It is known to keep the inner surface to a minimum and to increase its service life the weapon barrel, which is usually made of steel, with a hard metal layer, e.g. one Chrome layer or a chromium-containing alloy layer (e.g. a cobalt-chromium-tungsten alloy), to provide.

Nachteilig ist bei derartigen Waffenrohren, daß die Aufbringung der Auftragsschicht prozeßtechnisch relativ aufwendig ist und häufig Abplatzungen und Auswaschungen dieser Schicht auftreten, welche die Lebensdauer der Waffenrohre vermindern.A disadvantage of such gun barrels is that the application of the application layer is process-technical is relatively complex and often flaking and washing out of this layer occur, which reduce the life of the gun barrels.

Aus der DE 195 44 824 A1 ist es ferner bekannt, die innere Oberfläche des jeweiligen Waffenrohres durch eine thermische Oberflächenbehandlung mittels Laserstrahlen zu härten (Umwandlungshärten). Dabei wird die Laserstrahlung eines CO2-Lasers mündungsseitig axial in das Waffenrohr eingekoppelt und mit Hilfe eines in dem Waffenrohr verschiebbar angeordneten, eine Strahlenumlenkoptik enthaltenden Laserkopfes senkrecht auf die zu härtende Innenfläche des Waffenrohres geleitet. From DE 195 44 824 A1 it is also known to harden the inner surface of the respective weapon barrel by thermal surface treatment by means of laser beams (transformation hardening). In this case, the laser radiation of a CO 2 laser is axially coupled into the weapon barrel on the muzzle side and directed vertically onto the inner surface of the weapon barrel to be hardened with the aid of a laser head which is displaceably arranged in the weapon barrel and contains a beam deflecting optics.

Nachteilig ist bei dieser bekannten Laseranordnung, daß die Verwendung des CO2-Lasers ein relativ starres Strahlführungssystem erforderlich macht, so daß der Bearbeitungsraum eingegrenzt ist. Außerdem läßt sich dieser Schrift nicht entnehmen, auf welche Weise die zwischen Waffenrohr und Laserkopf erforderliche Relativbewegung realisiert werden könnte.A disadvantage of this known laser arrangement is that the use of the CO 2 laser requires a relatively rigid beam guidance system, so that the processing space is limited. In addition, it cannot be deduced from this document how the relative movement required between the weapon barrel and the laser head could be realized.

Aus der EP 0 406 043 A1 ist eine Vorrichtung bekannt, mit Hilfe derer defekte Rohre eines Druckwasser-Reaktors repariert werden können. Hierzu wird in den defekten Rohrbereich des jeweiligen Rohres eine Hülse eingebracht und mit der Innenwand mittels Laserlichtes verschweißt. Die bekannte Vorrichtung umfaßt einen Nd:YAG-Laser und einen entlang der Rohrachse verschiebbar anordbaren und eine Strahlumlenkoptik enthaltenden Laserkopf, welcher mit dem Laser über eine Lichtleitfaser verbunden ist. Der Laserkopf ist an einer im Rohr zentrierbaren und in Richtung der Rohrachse verschiebbaren Ziehstange befestigt.From EP 0 406 043 A1 a device is known, with the aid of which defective pipes a Pressurized water reactor can be repaired. This is done in the defective pipe area a sleeve is inserted into the respective tube and welded to the inner wall by means of laser light. The known device comprises an Nd: YAG laser and one along the Tube axis which can be displaced and which contains a beam deflecting optics, which is connected to the laser via an optical fiber. The laser head is on one Pipe centered and movable in the direction of the pipe axis attached pull rod.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Umwandlungshärten der Innenkontur eines Waffenrohres anzugeben, mit der das Waffenrohr sehr genau und homogen gehärtet werden kann und mit deren bestimmungsgemäßen Verwendung eine Vergrößerung des Bearbeitungsraumes verbunden ist.The present invention has for its object a device for transformation hardening to specify the inner contour of a gun barrel with which the gun barrel is very precise and homogeneous can be hardened and with their intended use an enlargement of the processing space connected is.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung offenbaren die Unteransprüche.This object is solved by the features of claim 1. Further advantageous configurations the invention disclose the subclaims.

Im wesentlichen liegt der Erfindung der Gedanke zugrunde, einerseits als Laser einen ND:YAG-Laser zu verwenden, da durch die gegenüber CO2-Lasern geringere Wellenlänge von 1,06 µm Glasfasern für die Übertragung des Laserstrahles eingesetzt werden können. Andererseits wird durch die Befestigung des Laserkopfes an einer in dem Waffenrohr zentrierbaren (und damit an den Rohrwänden abstützbaren) und in Richtung der Seelenachse des Waffenrohres verschiebbaren Ziehstange einer programmgesteuerten Nutenziehmaschine die Fokuslage des Laserstrahles bei dem Härtungsvorgang sehr genau eingehalten. Mit Hilfe der programmgesteuerten Nutenziehmaschine kann die Ziehstange sehr genau auf einer definierten Bahn über einen Maschinenschlitten programmgesteuert durch das Waffenrohr gezogen werden. Die relative Fokuslage des Laserstrahles bleibt durch die mitgeführten Buchsen im Rohr immer konstant.Essentially, the invention is based on the idea of using an ND: YAG laser as a laser, since glass fibers can be used for the transmission of the laser beam due to the shorter wavelength of 1.06 μm compared to CO 2 lasers. On the other hand, the laser head is (supportable and therefore on the pipe walls) at a centerable in the weapon barrel by the attachment and egg ner program-controlled Keyseating maintained very exactly the focal position of the laser beam during the curing process in the direction of the bore axis of the weapon barrel displaceable draw rod. With the help of the program-controlled grooving machine, the drawbar can be pulled through the gun barrel in a program-controlled manner on a defined slide using a machine slide. The relative focus position of the laser beam always remains constant due to the bushings carried in the tube.

Da der Absorptionsgrad der Laserstrahlen eines ND:YAG-Laser etwa 30 - 35% höher ist als derjenige eines CO2-Lasers, sind bei Verwendung eines ND:YAG-Lasers keine absorptionserhöhenden Coatingmittel erforderlich, so daß sich gegenüber einem CO2-Laser homogenere Härteschichten ergeben.Since the degree of absorption of the laser beams of an ND: YAG laser is approximately 30-35% higher than that of a CO 2 laser, no absorption-increasing coating agents are required when using an ND: YAG laser, so that they are more homogeneous compared to a CO 2 laser Hard layers result.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem folgenden anhand einer Figur erläuterten Ausführungsbeispiel. Dabei zeigt die Figur die Seitenansicht eines zu härtenden Waffenrohres in Verbindung mit einer Laseranlage und einer programmgesteuerten Nutenziehmaschine.Further details and advantages of the invention result from the following with reference to a figure explained embodiment. The figure shows the side view of a gun barrel to be hardened in connection with a laser system and a program-controlled groove drawing machine.

In der Fig. ist mit 1 das Waffenrohr bezeichnet, welches auf der Nutenziehmaschine 2 ausgerichtet und fixiert ist. Die Ziehstange 3 der Nutenziehmaschine erstreckt sich innerhalb des Waffenrohres 1 entlang deren Seelenachse 4 und stützt sich an der inneren Oberfläche 5 des Waffenrohres 1 über zwei Führungsbuchsen 6 und 7 ab.In the figure, 1 designates the weapon barrel, which is aligned on the groove-pulling machine 2 and is fixed. The pull rod 3 of the grooving machine extends within the weapon barrel 1 along the soul axis 4 and is supported on the inner surface 5 of the barrel 1 over two guide bushings 6 and 7.

An dem dem mündungsseitigen Ende 8 des Waffenrohres 1 zugewandten Ende 9 der Ziehstange 3 ist ein Laserkopf 10 angeordnet, welcher über eine Lichtleitfaser 11 mit einem Nd:YAG-Laser 12 (z.B. mit 2 kW Ausgangsleistung) verbunden ist. Außerdem ist der Laserkopf 10 über eine erste Schlauchleitung 13 mit einer Kühlvorrichtung 14 und über eine zweite Schlauchleitung 15 mit einer Schutzgasquelle 16 (z.B. mit Argon gefüllte Gasflasche) verbunden.At the end 8 of the barrel 1 facing the muzzle A laser head 10 is arranged at the end 9 of the pull rod 3, which via an optical fiber 11 with an Nd: YAG laser 12 (e.g. with 2 kW output power). In addition, the laser head 10 is via a first hose line 13 with a cooling device 14 and a second Hose line 15 with a protective gas source 16 (e.g. with Argon-filled gas bottle).

Der Laserkopf 10 umfaßt im wesentlichen einen Facettenspiegel 17, der den von der Lichtleitfaser 11 kommenden Laserstrahl auf die zu härtende innere Oberfläche 5 des Waffenrohres 1 fokussiert, und der aufgrund der im Betrieb auftretenden enormen Wärmeentwicklung durch ein Kühlmittel, welches über die Schlauchleitung 13 zugeführt wird, gekühlt werden kann. Der Laserkopf 10 ist ferner mit einer zweiten Rohr- oder Schlauchleitung 15 verbunden, über die ein Schutzgas beim Umwandlungshärten auf die erhitzte Oberfläche des Waffenrohres strömt und eine die Oberflächenqualität verschlechternde Oxidschichtbildung verhindert.The laser head 10 essentially comprises a facet mirror 17, the laser beam coming from the optical fiber 11 on the inner surface 5 of the weapon barrel 1 to be hardened focused, and that due to the occurring in operation enormous heat generation by a coolant, which over the hose line 13 is supplied, can be cooled. The laser head 10 is also with a second tube or Hose line 15 connected via a protective gas during transformation hardening on the heated surface of the barrel flows and a deteriorating surface quality Prevents oxide layer formation.

Mit der erfindungsgemäßen Vorrichtung lassen sich sowohl gezogene Waffenrohre als auch Waffenrohre mit einem Glattrohrprofil umwandlungshärten. Dabei haben Versuche ergeben, daß sich Stahlrohre bis in eine Tiefe von 0,4 bis 0,8 mm umwandlungshärten lassen, wobei die gehärteten Oberflächenbereiche zwischen 600 und 750 HV aufwiesen.With the device according to the invention, both drawn gun barrels as well as gun barrels with a smooth barrel profile transformation hardening. Experiments have shown that steel pipes go down to a depth of 0.4 to 0.8 mm let transformation hardening, the hardened surface areas had between 600 and 750 HV.

Wie der Fig. zu entnehmen ist, umfaßt die erfindungsgemäße Vorrichtung eine elektronische Steuervorrichtung 18, mit der die Laserleistung geregelt wird und welche auf eine dem Laser 12 ausgangsseitig nachgeschaltete Verschlußeinheit 19 wirkt und den ordnungsgemäßen Betrieb der Laseranlage ständig überwacht, derart, daß im Falle eines Defektes, z.B. bei einem Faserbruch der Lichtleitfaser oder einer unterbrochenen oder zu geringen Kühlung des Facettenspiegels etc., den Härtungsvorgang des Waffenrohres unterbricht.As can be seen from the figure, the invention comprises Device an electronic control device 18 with which the laser power is regulated and which one on the laser 12 downstream closure unit 19 acts and the correct operation of the laser system constantly monitored such that in the event of a defect, e.g. at a fiber break in the optical fiber or an interrupted one or insufficient cooling of the facet mirror etc., the The gun barrel interrupts the hardening process.

Wie in der Fig. durch die gestrichelte Linie 20 angedeutet ist, wird die elektronische Steuervorrichtung 18 vorzugsweise mit der Steuervorrichtung 21 für die Nutenziehmaschine verbunden. Dadurch wird einerseits die flexible Gestaltung von Bearbeitungszyklen und andererseits die Überwachung von sicherheitstechnischen Verriegelungen gewährleistet.As indicated in the figure by the broken line 20 electronic control device 18 is preferred connected to the control device 21 for the groove drawing machine. On the one hand, this makes the flexible design of Machining cycles and on the other hand the monitoring of safety-related interlocks guaranteed.

Die Erfindung ist selbstverständlich nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt. So kann beispielsweise zusätzlich zu den Rohr- oder Schlauchleitungen 13 und 15 eine dritte Rohr- oder Schlauchleitung vorgesehen sein, durch die Druckluft oder Stickstoff quer zur Strahlaustrittsöffnung des Laserkopfes geführt wird, um durch diesen gerichteten Gasstrom die Spiegeloptik und den Innenraum des Laserkopfes vor Verschmutzungen zu schützen. The invention is of course not based on the above described embodiment limited. For example in addition to the pipe or hose lines 13 and 15 a third pipe or hose line is provided be through the compressed air or nitrogen across the jet outlet of the laser head is passed through this directed gas flow, the mirror optics and the interior protect the laser head from dirt.

BezugszeichenlisteReference list

11
WaffenrohrGun barrel
22nd
NutenziehmaschineGrooving machine
33rd
ZiehstangePull rod
44th
SeelenachseSoul axis
55
Oberflächesurface
6,76.7
FührungsbuchsenGuide bushings
88th
mündungsseitige Endemouth end
99
Ende (Ziehstange)End (pull rod)
1010th
LaserkopfLaser head
1111
LichtleitfaserOptical fiber
1212th
Laserlaser
1313
erste Schlauchleitungfirst hose line
1414
KühlvorrichtungCooler
1515
zweite Schlauchleitungsecond hose line
1616
SchutzgasquelleShielding gas source
1717th
Facettenspiegel, StrahlumlenkoptikFaceted mirror, beam deflection optics
1818th
elektronische Steuervorrichtungelectronic control device
1919th
VerschlußeinheitLocking unit
2020th
gestrichelte Liniedashed line
2121
Steuervorrichtung (Nutenziehmaschine)Control device (groove drawing machine)

Claims (6)

  1. Device for hardening the internal contour of a gun barrel (1) with laser radiation, with the features:
    a) the device comprises a laser (12) and a laser head (10) which can be arranged in movable manner along the axis of the bore (4) of the gun barrel (1) and contains a beam deviating optics (17), so that the laser radiation can be introduced into the gun barrel (1) on the muzzle side and can be guided vertically onto the internal surface (5) of the gun barrel (1) by means of the beam deviating optics (17),
    b) the laser (12) is an Nd:YAG laser;
    c) the laser (12) is connected to the laser head (10) via a fibre optic waveguide (11);
    d) the laser head (10) is fixed to the muzzle-side end (8) of a pull rod (3) which can be centred in the gun barrel (1) and can be moved in the direction of the axis of the bore (4) of the gun barrel (1).
    e) the pull rod (3) is the pull rod of a program-controlled pull-type keyseating machine (2).
  2. Device according to Claim 1, characterized in that the beam deviating optics (17) of the laser head (10) is a bevelled mirror which focuses the laser radiation onto the internal surface (5) of the gun barrel (1).
  3. Device according to Claim 1 or 2, characterized in that in order to cool the beam deviating optics (17) the laser head (10) is connected to a cooling device (14) via a pipe or hose (13) which can be guided out of the gun barrel (1) on the muzzle side.
  4. Device according to one of Claims 1 to 3, characterized in that the laser head (10) is connected to a protective gas source (16) via a pipe or hose (15) which can be guided out of the gun barrel (1) on the muzzle side, and in that the laser head (10) is formed in such a way that when the laser radiation is applied to the internal surface (5) of the gun barrel (1) the protective gas flows onto that surface (5).
  5. Device according to one of Claims 1 to 4, characterized in that a third pipe or hose is provided through which compressed air or nitrogen can be guided and the outlet opening of which is selected in such a way that the gas emerges transversely to the beam aperture of the laser head (10), in order to protect the beam deviating optics (17) and the internal chamber of the laser head (10) from contamination.
  6. Device according to one of Claims 1 to 5, characterized in that an electronic control device (18) is provided, which regulates the laser power and acts on a closure unit (19) series-connected to the laser (12) in such a way that in the event of a defect in the device (broken fibre, no cooling etc.) the hardening process of the gun barrel (1) is discontinued.
EP98116447A 1997-09-18 1998-08-31 Apparatus for hardening the internal contour of a gun barrel with laser beam Expired - Lifetime EP0908264B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19741028A DE19741028C1 (en) 1997-09-18 1997-09-18 Apparatus for hardening inner contour of weapon barrel by laser radiation
DE19741028 1997-09-18

Publications (2)

Publication Number Publication Date
EP0908264A1 EP0908264A1 (en) 1999-04-14
EP0908264B1 true EP0908264B1 (en) 2001-11-21

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US (1) US6040551A (en)
EP (1) EP0908264B1 (en)
DE (2) DE19741028C1 (en)
ES (1) ES2166124T3 (en)
TR (1) TR199801848A3 (en)

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DE10328450A1 (en) * 2003-06-25 2005-01-20 Rheinmetall W & M Gmbh Method for eliminating coating and / or erosion damage
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US7897265B2 (en) * 2006-01-26 2011-03-01 Hamilton Sundstrand Corporation Low cost, environmentally favorable, chromium plate replacement coating for improved wear performance
EP2126327B1 (en) * 2007-01-19 2015-12-09 BorgWarner Ludwigsburg GmbH Device for producing a temperature gradient

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EP0908264A1 (en) 1999-04-14
DE59802695D1 (en) 2002-02-21
DE19741028C1 (en) 1998-11-05
TR199801848A2 (en) 1999-04-21
ES2166124T3 (en) 2002-04-01
US6040551A (en) 2000-03-21
TR199801848A3 (en) 1999-04-21

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