EP3524038A1 - Protective nozzle cap, plasma arc torch comprising said protective nozzle cap, and use of the plasma arc torch - Google Patents

Protective nozzle cap, plasma arc torch comprising said protective nozzle cap, and use of the plasma arc torch

Info

Publication number
EP3524038A1
EP3524038A1 EP17783449.6A EP17783449A EP3524038A1 EP 3524038 A1 EP3524038 A1 EP 3524038A1 EP 17783449 A EP17783449 A EP 17783449A EP 3524038 A1 EP3524038 A1 EP 3524038A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
protection cap
nozzle protection
arc plasma
plasma torch
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
EP17783449.6A
Other languages
German (de)
French (fr)
Other versions
EP3524038B1 (en
Inventor
Jens Friedel
Timo Grundke
Volker Krink
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.)
Kjellberg Stiftung
Original Assignee
Kjellberg Stiftung
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 Kjellberg Stiftung filed Critical Kjellberg Stiftung
Publication of EP3524038A1 publication Critical patent/EP3524038A1/en
Application granted granted Critical
Publication of EP3524038B1 publication Critical patent/EP3524038B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/28—Cooling arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3457—Nozzle protection devices

Definitions

  • Nozzle cap Nozzle cap, arc plasma torch with this nozzle cap and use of the arc plasma torch
  • the present invention relates to a nozzle protection cap for a
  • Arc plasma torch an arc plasma torch with this nozzle cap and a use of the arc plasma torch.
  • the arc plasma torch can be used both for dry cutting and in particular but also advantageously for underwater cutting various metal workpieces.
  • an arc In plasma cutting, an arc (pilot arc) is first ignited between a cathode (electrode) and anode (nozzle) and then transferred directly to a workpiece to make a cut.
  • Said arc forms a plasma, which is a thermally highly heated, electrically conductive gas (plasma gas), which consists of positive and negative
  • Ions, electrons and excited and neutral atoms and molecules are used as plasma gas.
  • gases such as argon, hydrogen, nitrogen, oxygen or air are used. These gases are ionized and dissociated by the energy of the arc. The resulting plasma jet is used to cut the workpiece.
  • a modern arc plasma burner consists essentially of some basic elements, such as torch body, electrode (cathode), nozzle, one or more caps, in particular a nozzle cap and a
  • Nozzle protection cap surrounding the nozzle and connections used to supply the arc plasma torch with electrical power, gases and / or liquids.
  • Nozzle covers are used to protect a nozzle from heat and spewing molten metal from the workpiece during the cutting process.
  • a nozzle may consist of one or more component components. For direct water-cooled arc plasma torches, the nozzle becomes
  • the nozzle cap can be omitted. Then the secondary gas flows between the nozzle and the nozzle protection cap.
  • the electrode and the nozzle are arranged in a certain spatial relationship to each other and define a space, the plasma chamber, in which the plasma jet is formed.
  • the plasma jet can be in his
  • Parameters e.g. Diameter, temperature, energy density and
  • Flow rate of the plasma gas are greatly influenced by the design of the nozzle and electrode.
  • the electrodes and nozzles are made of different materials and in different shapes.
  • Nozzles and nozzle covers are usually made of copper and water cooled directly or indirectly. Depending on the cutting task and electrical power of the arc plasma torch nozzles are used, which have different inner contours and openings with different diameters and thus the optimal
  • DE 10 2004 049 445 A1 describes a
  • Nozzle cap holder as well as an arc plasma torch.
  • the nozzle guard comprises a front end portion and a rear end portion with a threaded portion on its inner surface to
  • EP 0 573 653 B1 relates to an arc plasma burner
  • Nozzle protection cap Just as in the arc plasma burner according to DE 10 2004 049 445 AI, a secondary gas within a
  • Nozzle protection cap holder inside a fferfactant tank and a nozzle cap asiderise a plasma jet The structural variants known per se from the prior art can in principle also be used in a nozzle protection cap according to the invention and an arc plasma torch equipped therewith.
  • the nozzle protection cap made of copper or other non-ferrous metal, which is usually particularly good heat conducting.
  • plasma cutting under water i. the tip of the plasma torch and thus the nozzle cap is located during the cutting in the water, in which the workpiece is arranged, occurs during piercing or cutting a reinforced
  • Another problem is the required mechanical strength of the nozzle caps, especially when the tip of the plasma torch and thus also the nozzle cap comes into contact with the workpiece. This can lead to deformations of the nozzle cap and also has a deterioration of the quality of the cut due to the disturbance of the gas flow of the secondary gas result.
  • the quality of cut over a longer period of time should be kept constant high and it should reduce the risk of mechanical damage to the nozzle cap.
  • the nozzle cap should be good heat conductive to avoid overheating.
  • Claim 8 defines a Arc plasma torch with this nozzle and claim 9, a use of the arc plasma torch.
  • the nozzle cap according to the invention for an arc plasma torch is on the outside at the top of the arc plasma torch, at which a plasma jet through nozzle-shaped openings of the
  • Arc plasma torch exits, arranged and fixed there. It is made of an iron alloy containing at least 0.05% sulfur.
  • sulfur should contain a proportion in the range of 0.05% to 0.5%, preferably in a proportion in the range of 0.1% to 0.4% and more preferably in the range of 0.15% to 0.35% be.
  • Alloy element which is selected from chromium, nickel, manganese, molybdenum, niobium, titanium, tungsten and vanadium, be included.
  • One or more additional alloying element (s) may be contained in a proportion of at most 35%.
  • the respective individual proportions of several additional alloying elements are summed up to a maximum of 35%.
  • the proportion of one or more additional alloying elements should be at least 5%, in addition to sulfur.
  • alloying element (s) and sulfur only iron should be part of the material used for the nozzle protection cap according to the invention.
  • no or a very small amount of carbon should be included in the iron alloy.
  • the carbon content should be limited to a maximum proportion of 2.1%, preferably a maximum proportion of 1.2%, more preferably a maximum proportion of 0.5%.
  • Cobalt should also be present in the iron alloy with less than 0.1%, preferably less than 0.05% and particularly preferably no cobalt.
  • the iron alloy used to make the nozzle guard should have a thermal conductivity of at least 10 W / m * K, a hardness of at least HB 150, and / or be resistant to oxidation and corrosion under normal environmental or service conditions. It should be under normal a common ambient atmosphere and use in water, in which at least no chemically aggressive substances are included, or an additional energy input, understood.
  • Nozzle cap is fastened, should at least be designed so that it has a burner body, an arranged in the torch body electrode, a
  • a nozzle having a central nozzle opening and arranged to cover the electrode separated by a plasma gas channel formed therebetween.
  • the nozzle protection cap which has a arranged at its front end side, the nozzle opening opposite the outlet opening and an annular secondary gas channel within the
  • Nozzle cap which communicates with the outlet opening should be releasably attached to the arc plasma torch.
  • the nozzle cap should be electrically insulated with respect to the electrode and the nozzle and form a secondary gas guide member having at least one passage.
  • Arc plasma torch can be used for cutting workpieces.
  • at least the nozzle protection cap and the respective workpiece are arranged below a water surface.
  • Showing: 1 shows a sectional view through an arc plasma burner with a nozzle protection cap according to the invention.
  • Fig. 1 shows a plasma torch 1 according to a particular embodiment of the invention.
  • the plasma torch 1 has a burner body 2 with a
  • Electrode 3 and a nozzle 4 which are formed substantially rotationally symmetrical about the longitudinal axis L of the plasma torch 1.
  • the electrode 3 and the nozzle 4 are arranged coaxially in the burner body 2, are in a certain spatial relationship and form a plasma chamber 6, through which flows a plasma gas PG, which is supplied via a plasma gas channel 6a.
  • a nozzle cap 5 is coaxial with the longitudinal axis L of the
  • Plasma torch 1 holds and surrounds the nozzle 4 protective.
  • the cooling water is supplied via a water feed WV and flows through a water return WR.
  • An annular secondary gas guide member 8 having a plurality of
  • Passages in particular in the form of bores, of which only one is denoted by the reference numeral 8a, is so in a formed between the nozzle cap 5 and a nozzle cap 7 secondary gas channel 9 between a secondary gas inlet 8b and the front end of the
  • Secondary gas channel 9 arranged so that the flowing through the passages 8a secondary gas SG strikes the outer surface of the nozzle cap 5.
  • the secondary gas SG is then passed through the secondary gas channel 9, which is delimited by the lateral surface of the nozzle cap 5 and the inner surface 7b of the nozzle cap 7, to the front end of the plasma torch 1, then a plasma jet (not shown) and passes through an outlet opening 7a of the nozzle cap 7 from.
  • Secondary gas SG flows around the plasma jet after its exit from a nozzle opening 4a and also creates a defined atmosphere around the
  • the passages 8a of the secondary gas guide part 8 are arranged so that a rotating flow of the secondary gas SG is achieved.
  • the passages 8 a in the secondary gas guide part 8 a can be equidistant over the
  • the burner has no nozzle cap 5 and the nozzle 4 is screwed, for example, in the burner body 2. Then, the space 5 through which the secondary gas SG flows, through the lateral surface of the nozzle 4 and through the inner surface 7 b of
  • Nozzle cap 7 limited.
  • Nozzle protection cap 7 according to claims 1 to 8 are used.
  • the nozzle guard 7 may be made of an alloy formed with iron and additionally 17% to 19% chromium, 8% to 10% nickel, and 0.15% to 0.35% sulfur.
  • the maximum carbon content can be 0.1%.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)
  • Arc Welding In General (AREA)

Abstract

The protective nozzle cap (7) of the invention for a plasma arc torch (1) is positioned and secured externally on the tip of the plasma arc torch (1) at which a plasma jet exits the plasma arc torch (1) through nozzle-type openings (4a, 7a). The protective nozzle cap (7) is made of an iron alloy containing at least 0.05% sulfur.

Description

Düsenschutzkappe, Lichtbogenplasmabrenner mit dieser Düsenschutzkappe sowie eine Verwendung des Lichtbogenplasmabrenners  Nozzle cap, arc plasma torch with this nozzle cap and use of the arc plasma torch
Die vorliegende Erfindung betrifft eine Düsenschutzkappe für einen The present invention relates to a nozzle protection cap for a
Lichtbogenplasmabrenner, einen Lichtbogenplasmabrenner mit dieser Düsenschutzkappe sowie eine Verwendung des Lichtbogenplasmabrenners. Arc plasma torch, an arc plasma torch with this nozzle cap and a use of the arc plasma torch.
Der Lichtbogenplasmabrenner kann sowohl zum Trockenschneiden und insbesondere aber auch vorteilhaft zum Unterwasserschneiden verschiedener metallischer Werkstücke eingesetzt werden. The arc plasma torch can be used both for dry cutting and in particular but also advantageously for underwater cutting various metal workpieces.
Beim Plasmaschneiden wird zunächst ein Lichtbogen (Pilotlichtbogen) zwischen einer Kathode (Elektrode) und Anode (Düse) gezündet und danach direkt auf ein Werkstück übertragen, um damit einen Schnitt vorzunehmen. In plasma cutting, an arc (pilot arc) is first ignited between a cathode (electrode) and anode (nozzle) and then transferred directly to a workpiece to make a cut.
Besagter Lichtbogen bildet ein Plasma, das ein thermisch hochaufgeheiztes, elektrisch leitfähiges Gas (Plasmagas) ist, das aus positiven und negativen Said arc forms a plasma, which is a thermally highly heated, electrically conductive gas (plasma gas), which consists of positive and negative
Ionen, Elektronen sowie angeregten und neutralen Atomen und Molekülen besteht. Als Plasmagas werden Gase wie Argon, Wasserstoff, Stickstoff, Sauerstoff oder Luft eingesetzt. Diese Gase werden durch die Energie des Lichtbogens ionisiert und dissoziiert. Der daraus entstehende Plasmastrahl wird zum Schneiden des Werkstücks eingesetzt. Ions, electrons and excited and neutral atoms and molecules. As plasma gas, gases such as argon, hydrogen, nitrogen, oxygen or air are used. These gases are ionized and dissociated by the energy of the arc. The resulting plasma jet is used to cut the workpiece.
Ein moderner Lichtbogenplasmabrenner besteht im Wesentlichen aus einigen Grundelementen, wie Brennerkörper, Elektrode (Kathode), Düse, eine oder mehrere Kappen, insbesondere eine Düsenkappe und eine A modern arc plasma burner consists essentially of some basic elements, such as torch body, electrode (cathode), nozzle, one or more caps, in particular a nozzle cap and a
Düsenschutzkappe, die die Düse umgeben, sowie aus Verbindungen, die zur Versorgung des Lichtbogenplasmabrenners mit elektrischem Strom, Gasen und/oder Flüssigkeiten dienen. Nozzle protection cap surrounding the nozzle and connections used to supply the arc plasma torch with electrical power, gases and / or liquids.
Düsenschutzkappen dienen dazu, eine Düse während des Schneidprozesses vor Wärme und herausspritzendem geschmolzenen Metall des Werkstücks zu schützen. Nozzle covers are used to protect a nozzle from heat and spewing molten metal from the workpiece during the cutting process.
Eine Düse kann aus einem oder mehreren Bauteilkomponenten bestehen. Bei direkt wassergekühlten Lichtbogenplasmabrennern wird die Düse A nozzle may consist of one or more component components. For direct water-cooled arc plasma torches, the nozzle becomes
üblicherweise von einer Düsenkappe gehalten. Zwischen der Düse und der Düsenkappe strömt Kühlwasser. Ein Sekundärgas strömt dann zwischen der Düsenkappe und einer Düsenschutzkappe. Dieses dient zur Schaffung einer definierten Atmosphäre, zur Einschnürung des Plasmastrahls und zum Schutz vor dem Spritzen beim Einstechen des Plasmastrahls in das jeweilige usually held by a nozzle cap. Cooling water flows between the nozzle and the nozzle cap. A secondary gas then flows between the nozzle cap and a nozzle cap. This serves to create a defined atmosphere, to constrict the plasma jet and to protect against splashing when piercing the plasma jet into the respective
Werkstück. Workpiece.
Bei gasgekühlten Lichtbogenplasmabrennern und indirekt wassergekühlten Lichtbogenplasmabrennern kann die Düsenkappe entfallen. Dann strömt das Sekundärgas zwischen der Düse und der Düsenschutzkappe. In gas-cooled arc plasma torches and indirect water-cooled arc plasma torches, the nozzle cap can be omitted. Then the secondary gas flows between the nozzle and the nozzle protection cap.
Die Elektrode und die Düse sind zueinander in einem bestimmten räumlichen Verhältnis angeordnet und begrenzen einen Raum, die Plasmakammer, in der der Plasmastrahl ausgebildet wird. Der Plasmastrahl kann in seinen The electrode and the nozzle are arranged in a certain spatial relationship to each other and define a space, the plasma chamber, in which the plasma jet is formed. The plasma jet can be in his
Parametern, wie z.B. Durchmesser, Temperatur, Energiedichte und Parameters, e.g. Diameter, temperature, energy density and
Durchflussrate des Plasmagases, durch die Gestaltung der Düse und Elektrode stark beeinflusst werden. Für die unterschiedlichen Plasmagase werden die Elektroden und Düsen aus unterschiedlichen Werkstoffen und in verschiedenen Formen hergestellt. Flow rate of the plasma gas, are greatly influenced by the design of the nozzle and electrode. For the different plasma gases, the electrodes and nozzles are made of different materials and in different shapes.
Düsen und Düsenschutzkappen werden in der Regel aus Kupfer hergestellt und direkt oder indirekt wassergekühlt. Je nach Schneidaufgabe und elektrischer Leistung des Lichtbogenplasmabrenners werden Düsen eingesetzt, die unterschiedliche Innenkonturen und Öffnungen mit unterschiedlichen Durchmessern aufweisen und damit die optimalen Nozzles and nozzle covers are usually made of copper and water cooled directly or indirectly. Depending on the cutting task and electrical power of the arc plasma torch nozzles are used, which have different inner contours and openings with different diameters and thus the optimal
Schneidergebnisse liefern. Deliver cutting results.
Beispielsweise die DE 10 2004 049 445 AI beschreibt einen For example, DE 10 2004 049 445 A1 describes a
Lichtbogenplasmabrenner mit einer wassergekühlten Elektrode und Düse und einer gasgekühlten Düsenschutzkappe. Dazu wird das Sekundärgas durch einen Düsenschutzkappenhalter innen an einem Schraubverbindungsbereich zwischen dem Düsenschutzkappenhalter und einer Düsenschutzkappe vorbei durch einen zwischen der Düsenschutzkappe und einer Düsenkappe gebildeten Sekundärgaskanal einem Plasmastrahl zugeführt. EP 2 465 334 Bl betrifft zeigt eine Düsenschutzkappe und einen Arc plasma torch with a water-cooled electrode and nozzle and a gas-cooled nozzle cap. For this purpose, the secondary gas is fed through a nozzle protection cup holder inside a Schraubverbindungsbereich between the Düsenschutzkappenhalter and a nozzle protection cap by a secondary gas channel formed between the nozzle cap and a nozzle cap a plasma jet. EP 2 465 334 B1 relates to a nozzle protection cap and a
Düsenschutzkappenhalter sowie einen Lichtbogenplasmabrenner. Die Düsenschutzkappe umfasst einen vorderen Endabschnitt und einen hinteren Endabschnitt mit einem Gewindebereich auf seiner Innenfläche zum  Nozzle cap holder as well as an arc plasma torch. The nozzle guard comprises a front end portion and a rear end portion with a threaded portion on its inner surface to
Verschrauben mit einem Brennerkörper eines Lichtbogenplasmabrenners, wobei mindestens eine Nut den Gewindebereich auf der Innenfläche durchquert. Screwing to a burner body of an arc plasma torch, wherein at least one groove passes through the threaded portion on the inner surface.
Die EP 0 573 653 Bl betrifft einen Lichtbogenplasmabrenner mit EP 0 573 653 B1 relates to an arc plasma burner
wassergekühlter Elektrode und Düse sowie wassergekühlter water-cooled electrode and nozzle and water-cooled
Düsenschutzkappe. Genau wie bei dem Lichtbogenplasmabrenner gemäß de DE 10 2004 049 445 AI wird ein Sekundärgas innerhalb eines Nozzle protection cap. Just as in the arc plasma burner according to DE 10 2004 049 445 AI, a secondary gas within a
Düsenschutzkappenhalters innen an einem Schraubverbindungsbereich zwischen dem Düsenschutzkappenhalter und einer Düsenschutzkappe vorbe einem Plasmastrahl zugeführt. Die aus dem Stand der Technik an sich bekannten konstruktiven Varianten sind prinzipiell auch bei einer erfindungsgemäßen Düsenschutzkappe und einem damit ausgestatteten Lichtbogenplasmabrenner einsetzbar. Nozzle protection cap holder inside a Schraubverbindungsbereich between the Düsenschutzkappenhalter and a nozzle cap vorbe vorbe a plasma jet. The structural variants known per se from the prior art can in principle also be used in a nozzle protection cap according to the invention and an arc plasma torch equipped therewith.
In den beschriebenen Plasmabrennern besteht die Düsenschutzkappe aus Kupfer oder einem anderen Nichteisenmetall, das meist besonders gut wärmeleitend ist. Insbesondere beim Plasmaschneiden unter Wasser, d.h. die Spitze des Plasmabrenners und damit auch die Düsenschutzkappe befindet sich während des Schneidens im Wasser, in dem auch das Werkstück angeordnet ist, tritt beim Einstechen bzw. Schneiden ein verstärkter In the described plasma torches, the nozzle protection cap made of copper or other non-ferrous metal, which is usually particularly good heat conducting. In particular, in plasma cutting under water, i. the tip of the plasma torch and thus the nozzle cap is located during the cutting in the water, in which the workpiece is arranged, occurs during piercing or cutting a reinforced
Verschleiß an den Flächen der Bohrung der Düsenschutzkappe auf. Dies führt zur Verschlechterung der Schnittqualität, da die Gasströmung des Wear on the surfaces of the hole of the nozzle cap on. This leads to a deterioration of the cut quality, since the gas flow of the
Sekundärgases gestört wird. Außerdem verkürzt sich die nutzbare Secondary gas is disturbed. In addition, the usable one shortens
Lebensdauer, was zu häufigerem Austausch und Ausfallzeiten führt. Die Ursache dafür sind insbesondere elektroerosive Vorgänge, z.B. die Life, resulting in more frequent replacement and downtime. The cause for this is in particular electrical erosive processes, e.g. the
Funkenentladung beim Zünden, elektrochemische Vorgänge sowie physikalische Überlastungen des Werkstoffs durch Temperatur und/oder Kavitation. Spark discharge during ignition, electrochemical processes and physical overloading of the material due to temperature and / or cavitation.
Ein weiteres Problem ist die erforderliche mechanische Festigkeit der Düsenschutzkappen, insbesondere dann, wenn die Spitze des Plasmabrenners und damit auch die Düsenschutzkappe in Berührung mit dem Werkstück kommt. Dies kann zu Verformungen der Düsenschutzkappe führen und hat ebenfalls eine Verschlechterung der Schnittqualität durch die Störung der Gasströmung des Sekundärgases zur Folge. Another problem is the required mechanical strength of the nozzle caps, especially when the tip of the plasma torch and thus also the nozzle cap comes into contact with the workpiece. This can lead to deformations of the nozzle cap and also has a deterioration of the quality of the cut due to the disturbance of the gas flow of the secondary gas result.
Der Erfindung liegt somit die Aufgabe zugrunde, die Lebensdauer der Düsenschutzkappe eines Lichtbogenplasmabrenners zu verbessern. The invention is therefore an object of the invention to improve the life of the nozzle cap of an arc plasma torch.
Insbesondere betrifft dies das Plasmaschneiden unter Wasser. Weiterhin soll die Schnittqualität über einen längeren Zeitraum konstant hoch gehalten werden können und es soll die Gefahr der mechanischen Beschädigungen der Düsenschutzkappe verringert werden. Gleichzeitig soll die Düsenschutzkappe gut Wärme leitend sein, um Überhitzung zu vermeiden. In particular, this concerns plasma cutting under water. Furthermore, the quality of cut over a longer period of time should be kept constant high and it should reduce the risk of mechanical damage to the nozzle cap. At the same time the nozzle cap should be good heat conductive to avoid overheating.
Erfindungsgemäß wird diese Aufgabe mit einer Düsenschutzkappe, die die Merkmale des Anspruchs 1 aufweist, gelöst. Anspruch 8 definiert einen Lichtbogenplasmabrenner mit dieser Düse und Anspruch 9 eine Verwendung des Lichtbogenplasmabrenners. According to the invention this object is achieved with a nozzle protection cap having the features of claim 1. Claim 8 defines a Arc plasma torch with this nozzle and claim 9, a use of the arc plasma torch.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung können mit in untergeordneten Ansprüchen bezeichneten Merkmalen realisiert werden. Advantageous embodiments and further developments of the invention can be realized with features described in the subordinate claims.
Die erfindungsgemäße Düsenschutzkappe für einen Lichtbogenplasmabrenner ist außenseitig an der Spitze des Lichtbogenplasmabrenners, an der ein Plasmastrahl durch düsenförmige Öffnungen aus dem The nozzle cap according to the invention for an arc plasma torch is on the outside at the top of the arc plasma torch, at which a plasma jet through nozzle-shaped openings of the
Lichtbogenplasmabrenner austritt, angeordnet und dort befestigt. Sie ist aus einer Eisenlegierung, in der Schwefel mit einem Anteil von mindestens 0,05 % enthalten ist, hergestellt. Arc plasma torch exits, arranged and fixed there. It is made of an iron alloy containing at least 0.05% sulfur.
In der Eisenlegierung sollte Schwefel mit einem Anteil im Bereich 0,05% bis 0,5 %, bevorzugt mit einem Anteil im Bereich 0,1 % bis 0,4 % und besonders bevorzugt im Bereich 0,15 % bis 0,35 % enthalten sein. In the iron alloy, sulfur should contain a proportion in the range of 0.05% to 0.5%, preferably in a proportion in the range of 0.1% to 0.4% and more preferably in the range of 0.15% to 0.35% be.
Neben dem Schwefel kann mindestens ein weiteres zusätzliches In addition to the sulfur can be at least one additional
Legierungselement, das ausgewählt ist aus Chrom, Nickel, Mangan, Molybdän, Niob, Titan, Wolfram und Vanadium, enthalten sein. Alloy element, which is selected from chromium, nickel, manganese, molybdenum, niobium, titanium, tungsten and vanadium, be included.
Ein oder mehrere zusätzliche Legierungselement(e) kann/können mit einem Anteil von maximal 35 % enthalten sein. Dabei sind die jeweiligen einzelnen Anteile mehrerer zusätzlicher Legierungselemente auf maximal 35 % summiert. Der Anteil eines oder mehrerer zusätzlicher Legierungselemente sollte jedoch neben dem Schwefel mindestens 5 % betragen. Neben dem Anteil an Legierungselement(en) und Schwefel sollt nur Eisen Bestandteil des für die erfindungsgemäße Düsenschutzkappe eingesetzten Werkstoffs sein. One or more additional alloying element (s) may be contained in a proportion of at most 35%. The respective individual proportions of several additional alloying elements are summed up to a maximum of 35%. However, the proportion of one or more additional alloying elements should be at least 5%, in addition to sulfur. In addition to the proportion of alloying element (s) and sulfur only iron should be part of the material used for the nozzle protection cap according to the invention.
Als zusätzliche Legierungselemente sollten jedoch Chrom und Nickel gemeinsam in der Eisenlegierung enthalten sein. As additional alloying elements, however, chromium and nickel should be co-contained in the iron alloy.
Günstigerweise sollte kein oder ein sehr geringer Anteil Kohlenstoff in der Eisenlegierung enthalten sein. Der Kohlenstoffanteil sollte auf einen maximalen Anteil von 2,1 %, bevorzugt einen maximalen Anteil von 1,2 %, besonders bevorzugt einen Anteil von maximal 0,5 % begrenzt sein. In der Eisenlegierung sollte auch Kobalt mit weniger als 0,1 %, bevorzugt weniger als 0,05 % und besonders bevorzugt kein Kobalt enthalten sein. Die für die Herstellung der Düsenschutzkappe eingesetzte Eisenlegierung sollte eine thermische Leitfähigkeit von mindestens 10 W/m*K, eine Härte von mindestens HB 150 aufweisen und/oder bei normalen Umgebungs- oder Einsatzbedingungen oxidations- und korrosionsbeständig sein. Dabei soll unter normal eine übliche Umgebungsatmosphäre und ein Einsatz in Wasser, in dem zumindest keine chemisch aggressiven Stoffe enthalten sind, oder ein zusätzlicher Energieeintrag erfolgt, verstanden sein. Conveniently, no or a very small amount of carbon should be included in the iron alloy. The carbon content should be limited to a maximum proportion of 2.1%, preferably a maximum proportion of 1.2%, more preferably a maximum proportion of 0.5%. Cobalt should also be present in the iron alloy with less than 0.1%, preferably less than 0.05% and particularly preferably no cobalt. The iron alloy used to make the nozzle guard should have a thermal conductivity of at least 10 W / m * K, a hardness of at least HB 150, and / or be resistant to oxidation and corrosion under normal environmental or service conditions. It should be under normal a common ambient atmosphere and use in water, in which at least no chemically aggressive substances are included, or an additional energy input, understood.
Ein Lichtbogenplasmabrenner an dem eine erfindungsgemäße An arc plasma torch on which an inventive
Düsenschutzkappe befestigbar ist, sollte zumindest so ausgebildet sein, dass er einen Brennerkörper, eine im Brennerkörper angeordneten Elektrode, eineNozzle cap is fastened, should at least be designed so that it has a burner body, an arranged in the torch body electrode, a
Düse, die eine zentrale Düsenöffnung aufweist und so angeordnet ist, dass sie die Elektrode durch einen Plasmagaskanal getrennt abdeckt, der zwischen diesen gebildet ist, aufweist. Die Düsenschutzkappe, die eine an ihrer vorderen Endseite angeordnete, der Düsenöffnung gegenüberliegende Austrittsöffnung und einen ringförmigen Sekundärgaskanal innerhalb derA nozzle having a central nozzle opening and arranged to cover the electrode separated by a plasma gas channel formed therebetween. The nozzle protection cap, which has a arranged at its front end side, the nozzle opening opposite the outlet opening and an annular secondary gas channel within the
Düsenschutzkappe aufweist, der mit der Austrittsöffnung in Verbindung steht, sollte am Lichtbogenplasmabrenner lösbar befestigt sein. Die Nozzle cap which communicates with the outlet opening should be releasably attached to the arc plasma torch. The
Düsenschutzkappe sollte bezüglich der Elektrode und der Düse elektrisch isoliert sein und einem Sekundärgasführungsteil, das mindestens einen Durchlass aufweist, ausbilden. The nozzle cap should be electrically insulated with respect to the electrode and the nozzle and form a secondary gas guide member having at least one passage.
Ein mit einer erfindungsgemäßen Düsenschutzkappe ausgestatteter An equipped with a nozzle protection cap according to the invention
Lichtbogenplasmabrenner kann zum Schneiden von Werkstücken eingesetzt werden. Dabei sind zumindest die Düsenschutzkappe und das jeweilige Werkstück unterhalb einer Wasseroberfläche angeordnet. Arc plasma torch can be used for cutting workpieces. In this case, at least the nozzle protection cap and the respective workpiece are arranged below a water surface.
Nachfolgend soll die Erfindung beispielhaft näher erläutert werden. The invention will be explained in more detail by way of example in the following.
Dabei zeigt: Figur 1 eine Schnittdarstellung durch einen Lichtbogenplasmabrenner mit einer erfindungsgemäßen Düsenschutzkappe. Showing: 1 shows a sectional view through an arc plasma burner with a nozzle protection cap according to the invention.
Fig. 1 zeigt einen Plasmabrenner 1 gemäß einer besonderen Ausführungsform der Erfindung. Der Plasmabrenner 1 hat einen Brennerkörper 2 mit einerFig. 1 shows a plasma torch 1 according to a particular embodiment of the invention. The plasma torch 1 has a burner body 2 with a
Elektrode 3 und einer Düse 4, die im Wesentlichen rotationssymmetrisch um die Längsachse L des Plasmabrenners 1 ausgebildet sind. Die Elektrode 3 und die Düse 4 sind im Brennerkörper 2 koaxial angeordnet, befinden sich in einem bestimmten räumlichen Verhältnis und bilden eine Plasmakammer 6, durch die ein Plasmagas PG strömt, das über einen Plasmagaskanal 6a zugeführt wird. Eine Düsenkappe 5 ist koaxial zur Längsachse L des Electrode 3 and a nozzle 4, which are formed substantially rotationally symmetrical about the longitudinal axis L of the plasma torch 1. The electrode 3 and the nozzle 4 are arranged coaxially in the burner body 2, are in a certain spatial relationship and form a plasma chamber 6, through which flows a plasma gas PG, which is supplied via a plasma gas channel 6a. A nozzle cap 5 is coaxial with the longitudinal axis L of the
Plasmabrenners 1 angeordnet, hält und umgibt die Düse 4 schützend. Plasma torch 1, holds and surrounds the nozzle 4 protective.
Zwischen der Düse 4 und der Düsenkappe 5 befindet sich ein Raum 11, durch den Kühlwasser strömt. Das Kühlwasser wird über einen Wasservorlauf WV zugeführt und strömt über einen Wasserrücklauf WR ab. Between the nozzle 4 and the nozzle cap 5 is a space 11, flows through the cooling water. The cooling water is supplied via a water feed WV and flows through a water return WR.
Ein ringförmiges Sekundärgasführungsteil 8 mit einer Vielzahl von An annular secondary gas guide member 8 having a plurality of
Durchlässen, insbesondere in Form von Bohrungen, von denen nur eine mit dem Bezugszeichen 8a gekennzeichnet ist, ist so in einem zwischen der Düsenkappe 5 und einer Düsenschutzkappe 7 gebildeten Sekundärgaskanal 9 zwischen einem Sekundärgaseinlass 8b und dem vorderen Ende des Passages, in particular in the form of bores, of which only one is denoted by the reference numeral 8a, is so in a formed between the nozzle cap 5 and a nozzle cap 7 secondary gas channel 9 between a secondary gas inlet 8b and the front end of the
Sekundärgaskanals 9 angeordnet, so dass das durch die Durchlässe 8a strömende Sekundärgas SG auf die äußere Mantelfläche der Düsenkappe 5 trifft. Das Sekundärgas SG wird danach durch den Sekundärgaskanal 9, der durch die Mantelfläche der Düsenkappe 5 und durch die innere Oberfläche 7b der Düsenschutzkappe 7 begrenzt ist, zum vorderen Ende des Plasmabrenners 1 geführt, dann einem Plasmastrahl (nicht gezeigt) zugeführt und tritt durch eine Austrittsöffnung 7a der Düsenschutzkappe 7 aus. Das rotierende Secondary gas channel 9 arranged so that the flowing through the passages 8a secondary gas SG strikes the outer surface of the nozzle cap 5. The secondary gas SG is then passed through the secondary gas channel 9, which is delimited by the lateral surface of the nozzle cap 5 and the inner surface 7b of the nozzle cap 7, to the front end of the plasma torch 1, then a plasma jet (not shown) and passes through an outlet opening 7a of the nozzle cap 7 from. The rotating one
Sekundärgas SG umströmt den Plasmastrahl nach seinem Austritt aus einer Düsenöffnung 4a und schafft zusätzlich eine definierte Atmosphäre um denSecondary gas SG flows around the plasma jet after its exit from a nozzle opening 4a and also creates a defined atmosphere around the
Plasmastrahl. Plasma jet.
Die Durchlässe 8a des Sekundärgasführungsteils 8 sind so angeordnet, dass eine rotierende Strömung des Sekundärgases SG erreicht wird. Beispielsweise können die Durchlässe 8a im Sekundärgasführungsteil 8a äquidistant über denThe passages 8a of the secondary gas guide part 8 are arranged so that a rotating flow of the secondary gas SG is achieved. For example, the passages 8 a in the secondary gas guide part 8 a can be equidistant over the
Kreisumfang des Sekundärgasführungsteils 8 und sich radial erstreckend oder mit einem Versatz zur Radiale, d.h. auf einen jeweils gegenüber dem tatsächlichen Kreismittelpunkt versetzten Punkt ausgerichtet, angeordnet sein. Circumference of the secondary gas guide part 8 and radially extending or with an offset to the radial, that is aligned to a respective offset from the actual center of the circle point, be arranged.
Es besteht auch die Möglichkeit, dass der Brenner keine Düsenkappe 5 aufweist und die Düse 4 beispielsweise in den Brennerkörper 2 eingeschraubt ist. Dann wird der Raum 5, durch den das Sekundärgas SG strömt, durch die Mantelfläche der Düse 4 und durch die innere Oberfläche 7b der There is also the possibility that the burner has no nozzle cap 5 and the nozzle 4 is screwed, for example, in the burner body 2. Then, the space 5 through which the secondary gas SG flows, through the lateral surface of the nozzle 4 and through the inner surface 7 b of
Düsenschutzkappe 7 begrenzt. Nozzle cap 7 limited.
Bei diesem Lichtbogenplasmabrenner kann erfindungsgemäß eine In this arc plasma burner can according to the invention a
Düsenschutzkappe 7 nach den Ansprüchen 1 bis 8 eingesetzt werden. In einem konkreten Einzelbeispiel kann die Düsenschutzkappe 7 aus einer Legierung, die mit Eisen und zusätzlich 17 % bis 19 % Chrom, 8 % bis 10 % Nickel und 0,15 % bis 0,35 % Schwefel gebildet ist, hergestellt worden sein. Der maximale Kohlenstoffanteil kann bei 0,1 % liegen. Nozzle protection cap 7 according to claims 1 to 8 are used. In a particular single example, the nozzle guard 7 may be made of an alloy formed with iron and additionally 17% to 19% chromium, 8% to 10% nickel, and 0.15% to 0.35% sulfur. The maximum carbon content can be 0.1%.
Bezugszeichen: Reference numerals:
1 Plasmabrenner 1 plasma torch
2 Brennerkörper  2 burner body
3 Elektrode  3 electrode
4 Düse  4 nozzle
4a Düsenöffnung  4a nozzle opening
5 Düsenkappe  5 nozzle cap
6 Plasmakammer  6 plasma chamber
6a Plasmagaskanal  6a plasma gas channel
7 Düsenschutzkappe 7 nozzle protection cap
7a Austrittsöffnung 7a outlet opening
7b Innenfläche  7b inner surface
8 Sekundärgasführungsteil 8 secondary gas guide part
8a Durchlass 8a passage
8b Sekundärgaseinlass 8b Secondary gas inlet
9 Sekundärgaskanal9 secondary gas channel
L Längsachse L longitudinal axis
PG Plasmagas  PG plasma gas
SG Sekundärgas  SG secondary gas
WV Wasservorlauf  WV water supply
WR Wasserrücklauf  WR water return

Claims

Patentansprüche claims
Düsenschutzkappe (7) für einen Lichtbogenplasmabrenner (1), die außenseitig an der Spitze des Lichtbogenplasmabrenners (1), an der ein Plasmastrahl durch düsenförmige Öffnungen (4a, 7a) aus dem Lichtbogenplasmabrenner (1) austritt, angeordnet und dort befestigt ist; Nozzle cap (7) for an arc plasma torch (1) disposed on the outside of the tip of the arc plasma torch (1) at which a plasma jet emerges from the arc plasma torch (1) through nozzle-shaped openings (4a, 7a);
dadurch gekennzeichnet, dass characterized in that
die Düsenschutzkappe (7) aus einer Eisenlegierung, in der Schwefel mit einem Anteil von mindestens 0,05 % enthalten ist, hergestellt ist. the nozzle protection cap (7) is made of an iron alloy containing sulfur in a proportion of at least 0.05%.
Düsenschutzkappe nach Anspruch 1, dadurch gekennzeichnet, dass in der Eisenlegierung Schwefel mit einem Anteil im Bereich 0,05% bis 0,5 %, bevorzugt mit einem Anteil im Bereich 0,1 % bis 0,4 %, besonders bevorzugt im Bereich 0,15 % bis 0,35 % enthalten ist. Nozzle protection cap according to claim 1, characterized in that in the iron alloy sulfur with a proportion in the range 0.05% to 0.5%, preferably in a proportion in the range 0.1% to 0.4%, particularly preferably in the range 0, 15% to 0.35% is included.
Düsenschutzkappe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass neben dem Schwefel mindestens ein weiteres zusätzliches Legierungselement, das ausgewählt ist, aus Chrom, Nickel, Mangan, Molybdän, Niob, Titan, Wolfram und Nozzle protection cap according to one of the preceding claims, characterized in that in addition to the sulfur at least one further additional alloying element which is selected from chromium, nickel, manganese, molybdenum, niobium, titanium, tungsten and
Vanadium ist. Vanadium is.
Düsenschutzkappe nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass ein oder mehrere zusätzliche Nozzle protection cap according to the preceding claim, characterized in that one or more additional ones
Legierungselement(e) mit einem Anteil von maximal 35 % enthalten ist/sind. Alloy element (s) is included with a maximum proportion of 35% / are.
Düsenschutzkappe nach einem der zwei vorhergehenden Ansprüche, dadurch gekennzeichnet, dass als zusätzliche Legierungselemente Chrom und Nickel enthalten sind. Nozzle protection cap according to one of the two preceding claims, characterized in that chromium and nickel are contained as additional alloying elements.
Düsenschutzkappe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass kein Kohlenstoff oder Kohlenstoff mit einem maximalen Anteil von 2,1 %, bevorzugt mit einem maximalen Anteil von 1,2 %, besonders bevorzugt mit einem Anteil von maximal 0,5 % enthalten ist. Nozzle protection cap according to one of the preceding claims, characterized in that no carbon or carbon with a maximum proportion of 2.1%, preferably with a maximum proportion of 1.2%, particularly preferably with a proportion of not more than 0.5%.
Düsenschutzkappe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass weniger als 0,1 %, bevorzugt weniger als 0,05 %, besonders bevorzugt kein Kobalt enthalten ist. Nozzle protection cap according to one of the preceding claims, characterized in that less than 0.1%, preferably less than 0.05%, particularly preferably no cobalt is contained.
Düsenschutzkappe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Eisenlegierung eine thermische Leitfähigkeit von mindestens 10 W/m*K, eine Härte von mindestens HB 150 aufweist und/oder bei normalen Umgebungs- oder Nozzle protection cap according to one of the preceding claims, characterized in that the iron alloy has a thermal conductivity of at least 10 W / m * K, a hardness of at least HB 150 and / or in normal ambient or
Einsatzbedingungen oxidations- und korrosionsbeständig ist. Operating conditions resistant to oxidation and corrosion.
Lichtbogenplasmabrenner (1 ) mit einem Brennerkörper (2 ), einer im Brennerkörper (2 ) angeordneten Elektrode (3 ), einer Düse (4 ), die eine zentrale Düsenöffnung (4a ) aufweist und so angeordnet ist, dass sie die Elektrode (3 ) durch einen Plasmagaskanal (6a ) getrennt abdeckt, der zwischen diesen gebildet ist, Arc plasma torch (1) having a burner body (2), an electrode (3) arranged in the burner body (2), a nozzle (4) having a central nozzle opening (4a) and being arranged to pass through the electrode (3) separately covers a plasma gas channel (6a) formed therebetween,
einer Düsenschutzkappe (7 ), die eine an ihrer vorderen Endseite angeordnete, der Düsenöffnung (4a ) gegenüberliegende a nozzle protection cap (7) having a front end side disposed opposite to the nozzle opening (4a)
Austrittsöffnung (7a ) und einen ringförmigen Sekundärgaskanal (9 ) innerhalb der Düsenschutzkappe (7 ) aufweist, der mit der Outlet opening (7a) and an annular secondary gas channel (9) within the nozzle cap (7), which with the
Austrittsöffnung (7a ) in Verbindung steht, wobei Outlet opening (7 a) is in communication, wherein
die Düsenschutzkappe (7 ) bezüglich der Elektrode (3 ) und der Düse (4) elektrisch isoliert angeordnet ist, und einem the nozzle protection cap (7) with respect to the electrode (3) and the nozzle (4) is arranged electrically isolated, and a
Sekundärgasführungsteil (8 ), das mindestens einen Durchlass (8a ) aufweist, Secondary gas guide part (8) having at least one passage (8a),
die Düsenschutzkappe (7) ist lösbar am Lichtbogenplasmabrenner (1) befestigt, dadurch gekennzeichnet, dass die Düsenschutzkappe (7) nach einem der vorhergehenden Ansprüche ausgebildet ist. Verwendung eines Lichtbogenplasmabrenners nach dem vorhergehenden Anspruch zum Schneiden von Werkstücken, wobe zumindest die Düsenschutzkappe (7) und das jeweilige Werkstück unterhalb einer Wasseroberfläche angeordnet sind. The nozzle protection cap (7) is releasably attached to the arc plasma burner (1), characterized in that the nozzle protection cap (7) is designed according to one of the preceding claims. Use of an arc plasma torch according to the preceding claim for cutting workpieces, wherein at least the nozzle protection cap (7) and the respective workpiece are arranged below a water surface.
EP17783449.6A 2016-10-06 2017-10-06 Protective nozzle cap, arc plasma torch having said protective nozzle cap and the use of the arc plasma torch Active EP3524038B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016219350.3A DE102016219350A1 (en) 2016-10-06 2016-10-06 Nozzle cap, arc plasma torch with this nozzle cap and use of the arc plasma torch
PCT/EP2017/075482 WO2018065578A1 (en) 2016-10-06 2017-10-06 Protective nozzle cap, plasma arc torch comprising said protective nozzle cap, and use of the plasma arc torch

Publications (2)

Publication Number Publication Date
EP3524038A1 true EP3524038A1 (en) 2019-08-14
EP3524038B1 EP3524038B1 (en) 2023-06-07

Family

ID=60080786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17783449.6A Active EP3524038B1 (en) 2016-10-06 2017-10-06 Protective nozzle cap, arc plasma torch having said protective nozzle cap and the use of the arc plasma torch

Country Status (7)

Country Link
US (1) US11178746B2 (en)
EP (1) EP3524038B1 (en)
JP (1) JP7090074B2 (en)
CN (1) CN110036697A (en)
DE (1) DE102016219350A1 (en)
RU (1) RU2741583C2 (en)
WO (1) WO2018065578A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016219350A1 (en) * 2016-10-06 2018-04-12 Kjellberg-Stiftung Nozzle cap, arc plasma torch with this nozzle cap and use of the arc plasma torch
DE102019210524B4 (en) * 2019-07-17 2024-09-19 Volkswagen Aktiengesellschaft Electrode arrangement for a plasma torch
TWI759689B (en) * 2020-02-18 2022-04-01 國立臺灣海洋大學 Electrochemical nozzle

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291723A (en) 1976-01-29 1977-08-02 Denki Jiki Zairiyou Kenkiyuush Corrosion resistance fe base alloy and production of it
JPS61174349A (en) 1985-01-30 1986-08-06 Res Inst Electric Magnetic Alloys Wear resistant high magnetic permeability alloy and its manufacture and magnetic recording/playback head
EP0573653B1 (en) 1991-02-28 1998-01-21 Kabushiki Kaisha Komatsu Seisakusho Plasma torch for cutting
US5334235A (en) * 1993-01-22 1994-08-02 The Perkin-Elmer Corporation Thermal spray method for coating cylinder bores for internal combustion engines
FR2706489B1 (en) 1993-06-14 1995-09-01 Ugine Savoie Sa Martensitic stainless steel with improved machinability.
CN1179124A (en) 1995-02-13 1998-04-15 株式会社小松制作所 Plasma cutting method
US6096992A (en) 1999-01-29 2000-08-01 The Esab Group, Inc. Low current water injection nozzle and associated method
DE102004049445C5 (en) 2004-10-08 2016-04-07 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh plasma torch
JP2007128677A (en) * 2005-11-01 2007-05-24 Komatsu Engineering Corp Plasma torch
EP1887096A1 (en) 2006-08-09 2008-02-13 Rovalma, S.A. Hot working steel
CN100503871C (en) 2007-08-15 2009-06-24 金雹峰 Ferroalloy
DE202009018173U1 (en) 2009-08-11 2011-03-17 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh Nozzle cap and nozzle cap holder and arc plasma torch with the same and / or the same
CN201543958U (en) 2009-11-27 2010-08-11 徐常在 Plasma arc cutting torch
EP2689640B1 (en) * 2011-02-25 2015-08-12 Nippon Steel & Sumitomo Metal Corporation Plasma torch
CN102628147B (en) 2012-04-17 2014-06-25 常熟市轧辊厂限公司 High-sulfur alloy steel roll and production method
ES2923761T3 (en) * 2013-05-16 2022-09-30 Kjellberg Stiftung Multi-part insulating insert for a plasma arc torch, torch, and associated assemblies using the same and associated methods
US10716199B2 (en) * 2013-07-25 2020-07-14 Hypertherm, Inc. Devices for gas cooling plasma arc torches and related systems and methods
BR112015028734B1 (en) 2013-10-04 2022-03-22 Kjellberg-Stiftung Insulating part of one or more parts for a plasma arc torch, in particular a plasma cutting torch and plasma torches and arrangements having the same
CN104505711A (en) 2014-12-08 2015-04-08 薛亚红 Electrode material for sparking plug
US10149376B2 (en) 2014-12-11 2018-12-04 Hypertherm, Inc. Water injection and venting of a plasma arc torch
CN105648320A (en) 2016-01-20 2016-06-08 广西丛欣实业有限公司 High-strength iron alloy
DE102016219350A1 (en) * 2016-10-06 2018-04-12 Kjellberg-Stiftung Nozzle cap, arc plasma torch with this nozzle cap and use of the arc plasma torch

Also Published As

Publication number Publication date
JP2019535109A (en) 2019-12-05
JP7090074B2 (en) 2022-06-23
RU2019110297A (en) 2020-11-06
EP3524038B1 (en) 2023-06-07
DE102016219350A1 (en) 2018-04-12
CN110036697A (en) 2019-07-19
US11178746B2 (en) 2021-11-16
US20200045804A1 (en) 2020-02-06
WO2018065578A1 (en) 2018-04-12
RU2741583C2 (en) 2021-01-27
RU2019110297A3 (en) 2020-11-25

Similar Documents

Publication Publication Date Title
EP1797747B1 (en) Plasma torch
DE102008018530B4 (en) A nozzle for a liquid-cooled plasma torch, arrangement of the same and a nozzle cap and liquid-cooled plasma torch with such an arrangement
EP2465334B1 (en) Protective nozzle cap, protective nozzle cap retainer, and arc plasma torch having said protective nozzle cap and/or said protective nozzle cap retainer
DE102011088433A1 (en) Process and plasma arc torch system for marking and cutting workpieces with the same set of auxiliaries
DE69233071T2 (en) A plasma arc cutter
DE4310762C2 (en) Plasma torch nozzle
EP3524038B1 (en) Protective nozzle cap, arc plasma torch having said protective nozzle cap and the use of the arc plasma torch
DE202008011356U1 (en) Tungsten inert gas welding torch
DE2912843A1 (en) PLASMA BURNER, PLASMA BURNER ARRANGEMENT AND METHOD FOR PLASMA PRODUCTION
EP2804450A2 (en) Insulating member for a plasma torch consisting of one or several parts, in particular a plasma cutting torch, and assemblies and plasma torch equipped with the same
EP2457681B1 (en) Torch for tungsten inert gas welding and electrode to be used in such torch
DE1255834B (en) Plasma torch
DE2429924A1 (en) EQUIPMENT FOR PLASMA PROCESSING OF ELECTRICAL CONDUCTING MATERIALS AND THEIR OPERATING PROCEDURES
EP2667689B1 (en) Electrode for plasma cutting torch and use of same
DE69901731T2 (en) WEARING PART FOR ARC BURNERS MADE FROM COPPER ALLOY
EP1570938B1 (en) Submerged arc welding method
DE102007041329A1 (en) Plasma torch, has ring anodes, where one ring anode is located at distance for temporary distribution of partial light arc per cathode of ring anode, and ignition anode arranged adjacent to two ring anodes in respective light arc channel
DE2033072C (en) Arc plasma torch with a cooled cathode and cooled anode
DE1243798B (en) Electrothermal jet nozzle
WO2021047708A2 (en) Wear part for an arc torch and plasma torch, arc torch and plasma torch comprising same, method for plasma cutting and method for producing an electrode for an arc torch and plasma torch
WO2022028648A1 (en) Electrode for a plasma cutting torch, assembly having said electrode, plasma cutting torch having said electrode, and method for plasma cutting
DE2426669A1 (en) NON-MELTING ELECTRODE FOR ARC PROCESSING IN OXYGEN ATMOSPHERES
DE202009012491U1 (en) Nozzle for a liquid-cooled plasma torch and plasma torch head with the same
DE2033072A1 (en) Plasma torch

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190502

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KJELLBERG-STIFTUNG

17Q First examination report despatched

Effective date: 20211012

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20221223

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1578466

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230615

Ref country code: DE

Ref legal event code: R096

Ref document number: 502017014875

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20230607

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230907

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CZ

Payment date: 20230802

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231009

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231007

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230727

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502017014875

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

26N No opposition filed

Effective date: 20240308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230607

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20231031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231006

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20231006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231006

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231031