EP2804450B1 - Pièce isolante en plusieurs parties pour une torche à arc plasma, torche et agencements associés dotés de celle-ci et procédé associé - Google Patents

Pièce isolante en plusieurs parties pour une torche à arc plasma, torche et agencements associés dotés de celle-ci et procédé associé Download PDF

Info

Publication number
EP2804450B1
EP2804450B1 EP13004796.2A EP13004796A EP2804450B1 EP 2804450 B1 EP2804450 B1 EP 2804450B1 EP 13004796 A EP13004796 A EP 13004796A EP 2804450 B1 EP2804450 B1 EP 2804450B1
Authority
EP
European Patent Office
Prior art keywords
plasma
torch
nozzle
conductive
conductive material
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.)
Active
Application number
EP13004796.2A
Other languages
German (de)
English (en)
Other versions
EP2804450A2 (fr
EP2804450A3 (fr
Inventor
Frank Herrn Laurisch
Volker Herrn Krink
Timo Herrn Grundke
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
Priority to KR1020157035646A priority Critical patent/KR102054543B1/ko
Priority to BR112015028734-4A priority patent/BR112015028734B1/pt
Priority to MX2015015427A priority patent/MX370068B/es
Priority to JP2016513457A priority patent/JP6643979B2/ja
Priority to RU2015153934A priority patent/RU2691729C2/ru
Priority to US14/890,615 priority patent/US10485086B2/en
Priority to CN201480027298.3A priority patent/CN105230131B/zh
Priority to CA2910221A priority patent/CA2910221C/fr
Priority to PCT/IB2014/001275 priority patent/WO2014184656A2/fr
Publication of EP2804450A2 publication Critical patent/EP2804450A2/fr
Publication of EP2804450A3 publication Critical patent/EP2804450A3/fr
Priority to ZA2015/08161A priority patent/ZA201508161B/en
Priority to US16/550,845 priority patent/US20200015345A1/en
Application granted granted Critical
Publication of EP2804450B1 publication Critical patent/EP2804450B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3436—Hollow cathodes with internal coolant flow
    • 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
    • H05H1/3442—Cathodes with inserted tip
    • 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
    • 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
    • H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
    • H05H7/001—Arrangements for beam delivery or irradiation

Definitions

  • the present invention relates to a multi-part insulating part for an arc plasma torch, in particular a plasma cutting torch, for electrical insulation between at least two electrically conductive components of the plasma torch, arrangements and plasma torches with such an insulating part, plasma torch with such an arrangement and methods for processing a workpiece with a thermal plasma , plasma cutting and plasma welding.
  • Plasma torches are generally used for the thermal processing of electrically conductive materials such as steel and non-ferrous metals.
  • Plasma welding torches are used for welding and plasma cutting torches for cutting electrically conductive materials such as steel and non-ferrous metals.
  • Plasma torches usually consist of a torch body, an electrode, a nozzle and a holder for it. Modern plasma torches also have a nozzle protection cap fitted over the nozzle. A nozzle is often fixed using a nozzle cap.
  • the components that wear out during operation of the plasma torch as a result of the high thermal load caused by the arc are, in particular, the electrode, the nozzle, the nozzle cap, the nozzle protective cap, the tip guard bracket and the plasma gas guide and shield gas guide parts. These components can be easily changed by an operator and are therefore referred to as wearing parts.
  • the plasma torches are connected by leads to a power source and a gas supply which feed the plasma torch. Furthermore, the plasma torch can be connected to a cooling device for a cooling medium, such as a cooling liquid.
  • the plasma cutting torches are discussed in detail below.
  • a plasma gas flows between the electrode and the nozzle.
  • the plasma gas is guided through a gas guide part, which can also be made up of several parts. This allows the plasma gas to be directed in a targeted manner. It is often rotated around the electrode by a radial and/or axial offset of the openings in the plasma gas guide part.
  • the plasma gas guide part is made of electrically insulating material, since the electrode and the nozzle must be electrically isolated from each other. This is necessary because the electrode and nozzle have different electrical potentials during operation of the plasma cutting torch. To operate the plasma cutting torch, an arc is generated between the electrode and the nozzle and/or the workpiece, which ionizes the plasma gas.
  • a high voltage can be applied between the electrode and the nozzle, which provides for a pre-ionization of the distance between the electrode and the nozzle and thus for the formation of an arc.
  • the arc burning between the electrode and the nozzle is also known as the pilot arc.
  • the pilot arc exits through the nozzle bore and strikes the workpiece, ionizing the path to the workpiece. This allows the arc to form between the electrode and the workpiece. This arc is also referred to as the main arc.
  • the pilot arc can be switched off during the main arc. However, it can also continue to be operated. During plasma cutting, this is often switched off in order not to put additional strain on the nozzle.
  • the electrode and the nozzle are thermally highly stressed and must be cooled. At the same time, they must also conduct the electrical current that is required to form the arc. For this reason, materials that conduct heat well and materials that conduct electricity well, usually metals such as copper, silver, aluminum, tin, zinc, iron or alloys containing at least one of these metals, are used for this purpose.
  • the electrode often consists of an electrode holder and an emissive insert made of a material that has a high melting temperature (>2000°C) and a lower electron work function than the electrode holder.
  • the materials used for the emission insert are non-oxidizing plasma gases such as argon, hydrogen, nitrogen, helium and mixtures thereof, tungsten when using, and nitrogen-oxygen mixture and mixtures when using oxidizing gases such as oxygen, air and mixtures thereof used with other gases, hafnium or zirconium.
  • the high-temperature material can be fitted into an electrode holder, which consists of a material that conducts heat and electricity well, for example by being pressed in with a form fit and/or force fit.
  • the electrode and nozzle can be cooled by gas, for example the plasma gas or a secondary gas, which flows along the outside of the nozzle.
  • gas for example the plasma gas or a secondary gas
  • cooling with a liquid such as water
  • the electrode and/or the nozzle are often cooled directly with the liquid, i.e. the liquid is in direct contact with the electrode and/or the nozzle.
  • there is a nozzle cap around the nozzle the inner surface of which together with the outer surface of the nozzle forms a coolant space in which the coolant flows.
  • nozzle protection cap outside the nozzle and/or the nozzle cap.
  • the inner surface of the nozzle guard and the outer surface of the nozzle or nozzle cap form a space through which a shield or shield gas flows.
  • the secondary or protective gas emerges from the hole in the nozzle protection cap and envelops the plasma jet and ensures a defined atmosphere around it.
  • the shielding gas protects the tip and tip guard from arcing that can form between the tip and the workpiece. These are called double arcs and can damage the nozzle.
  • the nozzle and the nozzle protection cap are heavily loaded by hot material spraying up.
  • the secondary gas the volume flow of which can be higher when piercing compared to the value when cutting, keeps the spraying material away from the nozzle and the nozzle protection cap and thus protects against damage.
  • the nozzle protection cap is also subjected to high thermal loads and must be cooled. For this reason, materials that conduct heat well and materials that conduct electricity well, usually metals such as copper, silver, aluminum, tin, zinc, iron or alloys containing at least one of these metals, are used for this purpose.
  • the electrode and the nozzle can also be cooled indirectly. They are connected to a component made of a material that conducts heat and electricity well, usually a metal such as copper, silver, aluminum, tin, zinc, iron or alloys containing at least one of these metals , contacted by touch. This component is in turn cooled directly, i.e. it is in direct contact with the mostly flowing coolant. At the same time, these components can serve as holders or receptacles for the electrode, the nozzle, the nozzle cap or the nozzle protection cap, and can conduct the heat away and supply the current.
  • a component made of a material that conducts heat and electricity well, usually a metal such as copper, silver, aluminum, tin, zinc, iron or alloys containing at least one of these metals , contacted by touch.
  • This component is in turn cooled directly, i.e. it is in direct contact with the mostly flowing coolant.
  • these components can serve as holders or receptacles for the electrode, the nozzle, the
  • the nozzle protection cap is usually only cooled by the secondary gas. Arrangements are also known in which the nozzle protection cap is cooled directly or indirectly by a cooling liquid.
  • Plasma cutting torches with water cooling require gas flow rates of 500 l/h to 4000 l/h, while plasma cutting torches without water cooling require gas flow rates of 5000 to 11000 l/h. These ranges depend on the cutting currents used, which can be in a range from 20 to 600 A, for example.
  • the volume flow of the plasma gas and/or secondary gas should be selected in such a way that the best cutting results are achieved. Volume flows that are too high, which are necessary for cooling, often worsen the cutting result.
  • gases other than air e.g. argon, nitrogen, hydrogen, oxygen or helium.
  • the invention is therefore based on the object of providing more effective cooling of components, in particular wearing parts, of a plasma torch.
  • WO 94088748 A1 discloses an example of a one-piece insulator for a plasma arc torch.
  • US6169370B1 discloses an example of a two-piece insulator for a cold plasma torch.
  • this object is achieved by a multi-part insulating part according to claim 1.
  • electrically non-conductive is also intended to include that the material of the plasma torch insulating part is slightly or not significantly electrically conductive.
  • the insulating part can, for example, be a plasma gas routing part, secondary gas routing part or cooling gas routing part.
  • this object is achieved by a multi-part insulating part according to claim 4.
  • this object is achieved by a method according to claim 22.
  • the invention is based on the surprising finding that by using a material that not only does not conduct electricity but also conducts heat well, a more effective and cheaper cooling is possible and smaller and simpler designs of plasma torches are possible and lower temperature differences and thus lower mechanical stresses can be achieved.
  • the invention provides a cooling of components, in particular wearing parts, of a plasma torch that is more effective and/or cheaper and/or leads to lower mechanical stresses and/or enables smaller and/or simpler plasma torch designs and at the same time to ensure the electrical insulation between components of a plasma torch.
  • FIG. 12 shows a liquid-cooled plasma cutting torch 1 according to a particular embodiment of the present invention. It comprises an electrode 2, an insulating part designed as a plasma gas guiding part 3 for guiding plasma gas PG and a nozzle 4.
  • the electrode 2 consists of an electrode holder 2.1 and an emission insert 2.2.
  • the electrode holder 2.2 consists of a material that is a good conductor of electricity and heat, in this case a metal, for example copper, silver, aluminum or an alloy containing at least one of these metals.
  • the emission insert 2.2 is made from a material that has a high melting point (>2000° C.).
  • non-oxidizing plasma gases e.g. argon, hydrogen, nitrogen, helium and mixtures thereof
  • tungsten is suitable here and when using oxidizing gases (e.g. oxygen, air, mixtures thereof, nitrogen-oxygen mixture) e.g. hafnium or Zirconium.
  • oxidizing gases e.g. oxygen, air, mixtures thereof, nitrogen-oxygen mixture
  • hafnium or Zirconium e.g. hafnium or Zirconium.
  • the emission insert 2.2 is placed in the electrode holder 2.1.
  • the electrode 2 is shown here as a flat electrode in which the emission insert 2.2 does not protrude beyond the surface of the front end of the electrode holder 2.1.
  • the electrode 2 protrudes into the hollow interior 4.2 of the nozzle 4.
  • the nozzle is screwed with a thread 4.20 into a nozzle holder 6 with an internal thread 6.20.
  • the plasma gas guide part 3 is arranged between the nozzle 4 and the electrode 2 .
  • Plasma gas guide part 3 has bores, openings, grooves and/or recesses (not shown) through which the plasma gas PG flows.
  • the plasma gas PG can be made to rotate by a corresponding arrangement, for example with a radial offset and/or an inclination to the center line M of radially arranged bores. It serves to stabilize the arc or the plasma jet.
  • the arc burns between the emission insert 2.2 and a workpiece (not shown) and is constricted by a nozzle hole 4.1.
  • the arc itself already has a high temperature, which is increased by its constriction. Temperatures of up to 30,000 K are reported. Therefore, the electrode 2 and the nozzle 4 are cooled with a cooling medium.
  • a liquid in the simplest case water, a gas, in the simplest case air or a mixture thereof, in the simplest case an air-water mixture, which is referred to as an aerosol, can be used as the cooling medium. Liquid cooling is considered the most effective.
  • a cooling tube 10 through which the coolant flows from the coolant supply line WV2 through the coolant space 10.10 to the electrode 2 in the vicinity of the emission insert 2.2 and through the space extending from the outer surface of the cooling tube 10 into the inner surface of the Electrode 2 is formed, is returned to the coolant return WR2.
  • the nozzle 4 is cooled indirectly via the nozzle holder 6, to which the coolant is conducted away again (WR1) through a coolant space 6.10 (WV1) and via a coolant space 6.11.
  • the coolant usually flows at a volume flow of 1 to 10 l/min.
  • the nozzle 4 and the nozzle holder 6 consist of a metal. Due to the mechanical contact formed with the aid of the external thread 4.20 of the nozzle 4 and the internal thread 6.20 of the nozzle holder 6, the heat generated in the nozzle 4 is conducted into the nozzle holder 6 and dissipated by the flowing cooling medium (WV1, WR1).
  • the insulating part designed as a plasma gas guide part 3 is designed in one piece in this example and consists of an electrically non-conductive material that is a good heat conductor. Electrical insulation between the electrode 2 and the nozzle 4 is achieved by using such an insulating part. This is necessary for the operation of the plasma cutting torch 1, namely the high-voltage ignition and the operation of a pilot arc burning between the electrode 2 and the nozzle 4. At the same time, heat is conducted between the electrode 2 and the nozzle 4 from the warmer to the colder component via the insulating part, which is designed as a plasma gas guide part 3 and is a good conductor of heat. So there is an additional heat exchange via the insulating part.
  • the plasma gas guiding part 3 is in contact with the electrode 2 and the nozzle 4 by contact via contact surfaces.
  • a contact surface 2.3 is, for example, a cylindrical outer surface of the electrode 2 and a contact surface 3.5 is a cylindrical inner surface of the plasma gas guiding part 3.
  • a contact surface 3.6 is a cylindrical outer surface of the plasma gas guiding part 3 and a contact surface 4.3 is a cylindrical inner surface of the nozzle 4 a loose fit with little play, e.g. H7/h6 according to DIN EN ISO 286, between the cylindrical inner and outer surfaces is used in order on the one hand to plug into one another and on the other hand to achieve good contact and thus low thermal resistance and thus good heat transfer.
  • the heat transfer can be improved by applying thermal paste to these contact surfaces.
  • the nozzle 4 and the plasma gas guide part 3 each have a contact surface 4.5 and 3.7, which are annular surfaces here and are in contact with one another by touching. This is a non-positive connection between the annular surfaces, which is realized by screwing the nozzle 4 into the nozzle holder 6 .
  • a ceramic material is used here by way of example as an electrically non-conductive and heat-conductive material.
  • Aluminum nitride which according to DIN 60672 has very good thermal conductivity (approx. 180 W/(m ⁇ K) and high specific electrical resistance (approx. 10 12 ⁇ ⁇ cm), is particularly suitable.
  • FIG 2 a cylindrical plasma cutting torch 1 is shown in which the electrode 2 is directly cooled with coolant.
  • the nozzle 4 is cooled by heat conduction via an insulating part designed as a plasma gas guide part 3 to the electrode 2, which is directly cooled with coolant.
  • an insulating part designed as a plasma gas guide part 3 to the electrode 2, which is directly cooled with coolant.
  • the insulating part which is designed as a plasma gas guide part 3 and is a good conductor of heat.
  • the plasma gas guide part 3 is in contact with the electrode and the nozzle 4 through contact via contact surfaces.
  • a contact surface 2.3 is, for example, a cylindrical outer surface of the electrode 2 and a contact surface 3.5 is a cylindrical inner surface of the plasma gas guiding part 3.
  • a contact surface 3.6 is a cylindrical outer surface of the plasma gas guiding part 3 and a contact surface 4.3 is a cylindrical inner surface of the nozzle 4.
  • a loose fit with little clearance for example H7/h6 according to DIN EN ISO 286, between the cylindrical inner and outer surfaces is used in order to on the one hand the nesting and on the other hand a good contact and thus low thermal resistance and thus good heat transfer.
  • the heat transfer can be improved by applying thermal paste to these contact surfaces. Then a fit with more play, for example H7/g6, can be used.
  • the nozzle 4 and the plasma gas guide part 3 each have a contact surface 4.5 or 3.7, which are annular surfaces here and are in contact with one another by touching. This is a non-positive connection between the annular surfaces, which is realized by screwing the nozzle 4 into the nozzle holder 6 .
  • a plasma cutting torch 1 is shown, in which a nozzle 4 is indirectly cooled via a nozzle holder 6, to which the coolant is guided through a coolant space 6.10 (WV1) and away again via a coolant space 6.11 (WR1).
  • WV1 coolant space 6.10
  • WR1 coolant space 6.11
  • the in the figures 1 and 2 shown direct cooling of the electrode 2 is not provided.
  • the conduction of heat from the electrode 2 to the nozzle 4 takes place via an insulating part designed as a plasma gas guide part 3 to the indirect coolant-cooled nozzle 4.
  • FIGS figures 1 and 2 the statements relating to FIGS figures 1 and 2 .
  • the Indian figure 4 shown plasma cutting torch 1 differs from that in FIG figure 1 plasma cutting torch shown is that the nozzle 4 is directly cooled with a coolant.
  • the nozzle 4 is fixed by a nozzle cap 5 .
  • An internal thread 5.20 of the nozzle cap 5 is screwed to an external thread 6.21 of a nozzle holder 6.
  • the outer surface of the nozzle 4 and a part of the nozzle holder 6 as well as the inner surface of the nozzle cap 5 form a coolant space 4.10, through which the coolant, which flows through the coolant spaces 6.10 and 6.11 of the nozzle mount 6 (WV1) and back (WR1), flows.
  • the heat is transferred between the electrode 2 and the nozzle 4 from the warmer to the colder component via the insulating part, which is designed as a plasma gas guide part 3 and has good thermal conductivity.
  • the plasma gas guiding part 3 is in contact with the electrode 2 and the nozzle 4 by contact. In this way, mechanical stresses in the plasma cutting torch 1 caused by high temperature differences can be reduced.
  • An advantage over the in 1 Plasma cutting torch shown is that the directly coolant-cooled nozzle 4 is better cooled than the indirectly cooled. Since the coolant flows in this arrangement up to the vicinity of the nozzle tip and a nozzle bore 4.1, where the greatest heating of the nozzle occurs, the cooling effect is particularly great.
  • the coolant chamber is sealed by O-rings between the nozzle cap 5 and the nozzle 4, the nozzle cap 5 and the nozzle holder 6 and the nozzle 4 and the nozzle holder 6.
  • the nozzle cap 5 is also heated by the coolant flowing through the coolant space 4.10 formed by the outer surface of the nozzle 4 and the inner surface of the nozzle cap 5. chilled The nozzle cap 5 is heated primarily by the radiation from the arc or the plasma jet and the heated workpiece.
  • the structure of the plasma cutting torch 1 is more complicated, since a nozzle cap 5 is also required.
  • a liquid, water in the simplest case, is preferably used here as the coolant.
  • FIG 5 shows a plasma cutting torch 1, the plasma cutting torch of figure 1 is similar, but in which a nozzle protective cap 8 is additionally arranged outside of the nozzle 4 . Bores 4.1 of the nozzle 4 and 8.1 of the nozzle protection cap 8 lie on a center line M. The inner surfaces of the nozzle protection cap 8 and a nozzle protection cap holder 9 form spaces 8.10 and 9.10 with the outer surfaces of the nozzle 4 and the nozzle holder 6, through which a secondary gas SG flows. This secondary gas emerges from the hole in the nozzle protection cap 8.1 and envelops the plasma jet (not shown) and ensures a defined atmosphere around it.
  • the secondary gas SG protects the nozzle 4 and the nozzle protection cap 8 from arcs that can form between them and the workpiece. These are referred to as double arcs and can damage the nozzle 4.
  • the nozzle 4 and the nozzle protective cap 8 are heavily loaded by hot, molten, high-splashing material.
  • the secondary gas SG whose volume flow during piercing can be higher than during cutting, keeps the material spraying up away from the nozzle 4 and the nozzle protection cap 8 and thus protects against damage.
  • the nozzle protection cap 8 must also be cooled in addition to the electrode 2 and nozzle 4.
  • the nozzle protection cap 8 is heated in particular by the radiation from the arc or the plasma jet and the heated workpiece. Particularly when piercing the workpiece, the nozzle protection cap 8 is thermally heavily stressed and heated up by the glowing material spraying up and must be cooled.
  • materials that are good heat conductors and electrically good conductors usually metals such as silver, copper, aluminum, tin, zinc, iron, alloyed steel or a metallic alloy (e.g. brass), in which these metals are individually or are contained at least 50% in total.
  • the secondary gas SG first flows through the plasma cutting torch 1 before it passes through a first space 9.10 which is formed by the inner surfaces of the nozzle protective cap holder 9 and the nozzle protective cap 8 and the outer surfaces of the nozzle holder 6 and the nozzle 4.
  • the first space 9 The secondary gas routing part 7 can be designed in several parts.
  • the secondary gas guide part 7 there are holes 7.1. However, there can also be openings, grooves or recesses through which the secondary gas SG flows.
  • the secondary gas can be made to rotate by a corresponding arrangement of the bores 7.1, for example with a radial offset and/or an inclination to the center line M. This serves to stabilize the arc or the plasma jet.
  • the secondary gas After passing the secondary gas guide part 7, the secondary gas flows into an interior space 8.10, which is formed by the inner surface of the nozzle protection cap 8 and the outer surface of the nozzle 4, and then exits the bore 8.1 of the nozzle protection cap 8.
  • the secondary gas hits it and can influence it.
  • the nozzle protection cap 8 is usually only cooled by the secondary gas SG.
  • Gas cooling has the disadvantage that it is not effective and the required gas volume flow is very high in order to achieve acceptable cooling or heat dissipation. Gas flow rates of 5,000 to 11,000 l/h are often required here.
  • the volume flow of the secondary gas must be selected in such a way that the best cutting results are achieved. Volume flows that are too high, which are necessary for cooling, often worsen the cutting result.
  • the insulating part designed as the secondary gas routing part 7 Electrical insulation between the nozzle protective cap 8 and the nozzle 4 is achieved by using such an insulating part.
  • heat is transferred between the nozzle protective cap 8 and the nozzle 4 from the warmer to the colder component, in this case from the nozzle protective cap 8 to the nozzle 4, via the insulating part, which is a good conductor of heat and is designed as a secondary gas guide part 7 .
  • the secondary gas guide part 7 is in contact with the nozzle protection cap 8 and the nozzle 4 by touch. In this exemplary embodiment, this takes place via annular surfaces 8.2 of the nozzle protection cap 8 and 7.4 of the secondary gas routing part 7 and the annular surfaces 7.5 of the secondary gas routing part 7 and 4.4 of the nozzle 4.
  • FIG. 6 shows the structure of a plasma cutting torch 1 as in 4 , In which, however, a nozzle protection cap 8 is additionally arranged outside of the nozzle cap 5 .
  • Bores 4.1 of the nozzle 4 and 8.1 of the nozzle protection cap 8 lie on a center line M.
  • the inner surfaces of the nozzle protection cap 8 and the nozzle protection cap holder 9 form spaces 8.10 and 9.10 with the outer surfaces of the nozzle cap 5 and the nozzle 4, through which a secondary gas SG can flow.
  • the secondary gas emerges from the bore 8.1 of the nozzle protection cap 8, envelops the plasma jet (not shown) and ensures a defined atmosphere around the same.
  • the secondary gas SG protects the nozzle 4, nozzle cap 5 and nozzle protection cap 8 from arcs that can form between them and a workpiece (not shown). These are referred to as double arcs and can damage the nozzle 4, nozzle cap 5 and nozzle protection cap 8.
  • the nozzle 4, the nozzle cap 5 and the nozzle protection cap 8 are heavily loaded by hot material spraying up.
  • the secondary gas SG whose volume flow during piercing can be higher than during cutting, keeps the material spraying up from the nozzle 4, the nozzle cap 5 and the nozzle protection cap 8 and thus protects it from damage.
  • the nozzle 4 and the nozzle cap 5 apply in the description of 4 statements made.
  • the nozzle protection cap 8 is heated in particular by the radiation from the arc or the plasma jet and the heated workpiece. Particularly when piercing the workpiece, the nozzle protection cap 8 is thermally heavily stressed and heated up by the glowing material spraying up and must be cooled. For this reason, heat and electrically well-conducting materials, usually metals, for example copper, aluminum, tin, zinc, iron or alloys containing at least one of these metals, are used for this purpose.
  • the secondary gas SG first flows through the plasma torch 1 before it passes through a space 9.10 formed by the inner surfaces of the nozzle protective cap holder 9 and the nozzle protective cap 8 and the outer surfaces of a nozzle holder 6 and the nozzle cap 5.
  • the space 9 The space 9 .
  • the secondary gas guide part 7 there are holes 7.1. However, there can also be openings, grooves or recesses through which the secondary gas SG flows.
  • the secondary gas SG can be made to rotate by means of a corresponding arrangement of these bores 7.1, which have a radial offset and/or are arranged radially with an inclination to the center line M, for example. This serves to stabilize the arc or the plasma jet.
  • the secondary gas SG After passing the secondary gas guide part 7, the secondary gas SG flows into the space (interior) 8.10, which is formed by the inner surface of the nozzle protection cap 8 and the outer surface of the nozzle cap 5 and the nozzle 4, and then exits from the bore 8.1 of the nozzle protection cap 8.
  • the secondary gas SG hits it and can influence it.
  • the nozzle protection cap 8 is usually only cooled by the secondary gas SG.
  • Gas cooling has the disadvantage that it is not effective and the required gas volume flow is very high in order to achieve acceptable cooling or heat dissipation. Gas flow rates of 5,000 to 11,000 l/h are often required here.
  • the volume flow of the secondary gas must be selected in such a way that the best cutting results are achieved. Volume flows that are too high, which are necessary for cooling, often worsen the cutting result.
  • the high gas consumption caused by large volume flows is uneconomical. This applies in particular when gases other than air, for example argon, nitrogen, hydrogen, oxygen or helium, are used.
  • the electrical insulation between the nozzle protection cap 8 and the nozzle cap 5 and thus also the nozzle 4 is achieved.
  • the electrical insulation in combination with the secondary gas SG, protects the nozzle 4, the nozzle cap 5 and the nozzle protection cap 8 from arcs that can form between them and a workpiece (not shown). These are called double arcs and can damage the tip, tip cap, and tip guard.
  • heat is transferred between the nozzle protection cap 8 and nozzle cap 5 from the warmer to the colder component, in this case from the nozzle protection cap 8 to the nozzle cap 5, via the insulating part which is a good conductor of heat and is designed as a secondary gas routing part 7 .
  • the secondary gas guiding part 7 is in contact with the nozzle protection cap 8 and the nozzle cap 5 by touch. In this exemplary embodiment, this is achieved by annular surfaces 8.2 of the nozzle protection cap 8 and 7.4 of the secondary gas routing part 7 and the annular surfaces 7.5 of the secondary gas routing part 7 and 5.3 of the nozzle cap 5.
  • connections are non-positive, with the nozzle protection cap 8 being held in place with the aid of the nozzle protection cap holder 9 is screwed to an external thread 11.20 of a receptacle 11 with an internal thread 9.20. This is pressed upwards against the secondary gas guide part 7 for the secondary gas SG and against the nozzle cap 5 . This way the heat will be dissipated from the tip guard 8 directed towards the nozzle cap 5 and thus cooled.
  • the nozzle cap 5 in turn, as in the description of 4 explained, chilled.
  • the nozzle protection cap holder 9 is screwed with its internal thread 9.20 to the external thread 11.20 of the receptacle 11, which is designed as an insulating part.
  • the receptacle 11 consists of an electrically non-conductive and heat-conductive material.
  • heat is transferred from the nozzle protection cap holder 9, which it can receive, for example, from the nozzle protection cap 8, from a hot workpiece or from the arc radiation, via the internal thread 9.20 and the external thread 11.20 to the receptacle 11.
  • the receptacle 11 has coolant passages 11.10 and 11.11 for the coolant supply (WV1) and coolant return (WR1), which are designed here as bores.
  • the coolant flows through this and thus cools the receptacle 11. This further improves the cooling of the nozzle protection cap holder 9.
  • the heat is transferred from the nozzle protective cap 8 via its contact surface 8.3, which is designed as a circular ring surface, to a contact surface 9.1, which is also designed as a circular ring surface, on the nozzle protective cap holder 9.
  • the contact surfaces 8.3 and 9.1 touch one another in a non-positive manner, with the nozzle protective cap 8 being screwed to the external thread 11.20 of the receptacle 11 with the aid of the nozzle protective cap holder 9 with the internal thread 9.20. This is pressed upwards against the secondary gas routing part 7 and the nozzle protection cap holder 9 against the nozzle protection cap 8 .
  • the receptacle 11 is made of ceramic.
  • Aluminum nitride which has very good thermal conductivity (approx. 180 W/(m ⁇ K)) and high specific electrical resistance (approx. 10 12 ⁇ ⁇ cm), is particularly suitable.
  • Coolant is simultaneously guided through coolant spaces 6.10 and 6.11 of the nozzle holder 6 to the nozzle 4 and nozzle cap 5 and cools them.
  • the receptacle 11 shows an embodiment of a plasma torch 1, which is that of 7 resembles. In principle, this also applies to the embodiments according to FIG 6 and 7 statements made. However, it contains a different embodiment of the insulating part designed as a receptacle 11 for the nozzle protection cap holder 9 .
  • the receptacle 11 consists of two parts, with an outer part 11.1 consisting of an electrically non-conductive and heat-conductive material and an inner part 11.2 consisting of an electrically highly conductive and heat-conductive material.
  • the nozzle protection cap holder 9 is screwed with its internal thread 9.20 to the external thread 11.20 of part 11.1 of receptacle 11.
  • the electrically non-conductive and thermally highly conductive material is made of ceramic, for example aluminum nitride, which has very good thermal conductivity (approx. 180 W/(m * K)) and a high specific electrical resistance of approx. 10 12 ⁇ * cm.
  • the material with good electrical and thermal conductivity is a metal here, for example copper, aluminum, tin, zinc, alloyed steel or alloys (for example brass) containing at least one of these metals.
  • the material with good electrical and thermal conductivity has a thermal conductivity of at least 40 W/(m ⁇ K) ⁇ and a specific electrical resistance of no more than 0.01 ⁇ ⁇ cm.
  • the material with good electrical and thermal conductivity has a thermal conductivity of at least 60 W/(m * K), better at least 90 W/(m * K) and preferably 120 W/(m * K).
  • the material with good electrical and thermal conductivity properties has a thermal conductivity of at least 150 W/(m * K), better still at least 200 W/(m * K) and preferably at least 300 W/(m * K).
  • the material, which conducts electricity and heat well is a metal, such as silver, copper, aluminum, tin, zinc, iron, alloyed steel or a metallic alloy (e.g. brass) that contains at least 50% of these metals individually or in total.
  • a metal such as silver, copper, aluminum, tin, zinc, iron, alloyed steel or a metallic alloy (e.g. brass) that contains at least 50% of these metals individually or in total.
  • Both parts (11.1 and 11.2) are non-positively connected by being pressed together and touching one another, as a result of which good heat transfer is achieved between the cylindrical contact surfaces 11.5 and 11.6 of the two parts 11.1 and 11.2.
  • the part 11.2 of the recording 11 has coolant passages 11.10 and 11.11 for the coolant supply (WV1) and coolant return (WR1), which are designed here as bores. The coolant flows through these and thus cools.
  • the present invention also relates to an insulating part for a plasma torch, in particular a plasma cutting torch, for electrical insulation between at least two electrically conductive components of the plasma torch, wherein it consists of at least two parts, one of the parts being made of an electrically non-conductive and heat a good conductive material and the other or another of the parts consists of a good electrical and heat conductive material.
  • FIG figure 9 shows another embodiment of a plasma cutting torch 1 according to the present invention, which is principally the one shown in FIG figure 8 shown embodiment is similar.
  • the insulating part designed as a receptacle 11 for the nozzle protection cap holder 9 is shown.
  • the receptacle 11 consists of two parts, in which case the outer part 11.1, in contrast to the one in figure 8 shown Embodiment consists of an electrically highly conductive and thermally conductive material (e.g. metal) and the inner part 11.2 consists of an electrically non-conductive and thermally conductive material (e.g. ceramics).
  • the nozzle protection cap holder 9 with its internal thread 9.20 is screwed to the external thread 11.20 of part 11.1 of receptacle 11.
  • the advantage of this embodiment is that the external thread can be made in the metallic material used for the part 11.1 and not in the ceramic, which is more difficult to machine.
  • Figures 10 to 13 show (further) different embodiments of an insulating part designed as a plasma gas guide part 3 for the plasma gas PG Figures 1 to 9 shown, wherein the respective figure with the letter “a” shows a longitudinal section and the respective figure with the letter “b” shows a partially sectioned side view.
  • the plasma gas guide part 3 shown is made of an electrically non-conductive and thermally highly conductive material, here by way of example made of ceramic.
  • Aluminum nitride which has very good thermal conductivity (approx. 180 W/(m ⁇ K)) and high specific electrical resistance (approx. 10 12 ⁇ ⁇ cm), is particularly suitable.
  • the associated advantages when used in a plasma cutting torch 1, such as better cooling, reduction in mechanical stresses, simpler structure, are already above in the description of the Figures 1 to 4 mentioned and explained.
  • the plasma gas guide part 3 there are radially arranged bores 3.1 which, for example, can be offset radially and/or inclined radially to the center line M and allow a plasma gas PG to rotate in the plasma cutting torch.
  • its contact surface 3.6 here for example a cylindrical outer surface
  • its contact surface 3.5 here for example a cylindrical inner surface
  • the contact surface 2.3 here for example a cylindrical Outer surface
  • the contact surface 4.5 here, for example, a circular surface of the nozzle 4 by touching in contact ( Figures 1 to 9 ).
  • the contact surface 3.6 there are grooves 3.8.
  • FIGS. 11a and 11b show a plasma gas guide part 3, which consists of two parts.
  • a first part 3.2 consists of an electrically non-conductive and heat-conductive material, while a second part 3.3 consists of an electrically highly conductive and heat-conductive material.
  • Ceramic is used here as an example for part 3.2 of the plasma gas guide part 3, again as an example aluminum nitride, which has very good thermal conductivity (approx. 180 W/(m * K)) and a high specific electrical resistance (10 12 ⁇ * cm).
  • a metal such as silver, copper, aluminum, tin, zinc, iron, alloyed steel or a metallic alloy (e.g. brass) is used here, in which these metals are used individually or in total at least are used to 50%.
  • the thermal conductivity of the plasma gas guide part 3 is greater than if it were made only of electrically non-conductive and heat-conductive material, such as aluminum nitride.
  • electrically non-conductive and heat-conductive material such as aluminum nitride.
  • copper has a higher thermal conductivity (max. approx. 390 W/(m ⁇ K)) than aluminum nitride (approx. 180 W/(m ⁇ K)), which is currently considered one of the best heat conductive and at the same time not a good electrical conductive material.
  • Aluminum nitride with a thermal conductivity of 220 W/(m * K) is now also available.
  • the parts 3.2 and 3.3 are connected by sliding the contact surfaces 3.21 and 3.31 over one another.
  • the parts 3.2 and 3.3 can also be non-positively connected by the contact surfaces 3.20 with 3.30, 3.21 with 3.31 and 3.22 to 3.32 which are pressed against one another and are opposite and touching.
  • the contact surfaces 3.20, 3.21 and 3.22 are contact surfaces of part 3.2 and the contact surfaces 3.30, 3.31 and 3.32 are contact surfaces of part 3.3.
  • the cylindrical contact surfaces 3.31 (cylindrical outer surface of part 3.3) and 3.21 (cylindrical inner surface of part 3.2) form a non-positive connection by being pressed together.
  • an interference fit DIN EN ISO 286 e.g. H7/n6; H7/m6 is used between the cylindrical inner and outer surfaces.
  • the Figures 12a and 12b show a plasma gas guide part 3, which consists of two parts, with a first part 3.2 consisting of an electrically non-conductive and thermally well conductive material, while a second part 3.3 consists of an electrically non-conductive and thermally non-conductive material.
  • ceramic is used as an example, again as an example aluminum nitride, which has a very good thermal conductivity (approx. 180 W/(m * K)) and a high specific electrical resistance (approx. 10 12 ⁇ * cm).
  • a plastic for example PEEK, PTFE (polytetrafluoroethene), Torlon, polyamideimide (PAI), polyimide (PI), which has a high temperature resistance (at least 200° C.) and a high specific electrical resistance, can be used for part 3.3 of the plasma gas guide part 3 (at least 10 6 , better at least 10 10 ⁇ ⁇ cm) can be used.
  • the parts 3.2 and 3.3 are connected by sliding the contact surfaces 3.21 and 3.31 over one another. You can also be non-positively connected by the pressed together, opposite and touching contact surfaces 3.20 with 3.30, 3.21 to 3.31 and 3.22 to 3.32.
  • the cylindrical contact surfaces 3.31 (cylindrical outer surface of part 3.3) and 3.21 (cylindrical inner surface of part 3.2) then form the non-positive connection by being pressed together.
  • an interference fit DIN EN ISO 286 e.g. H7/n6; H7/m6 is used between the cylindrical inner and outer surfaces. It is also possible to connect the two parts (3.2 and 3.3) to one another by positive locking and/or by gluing.
  • FIGS. 13a and 13b show a plasma gas guide part 3 as in FIG figure 12 , except that a further part 3.4, which consists of a material with the same properties as the part 3.3, belongs to the plasma gas guide part 3.
  • Parts 3.2 and 3.4 can be connected to one another in the same way as parts 3.2 and 3.3, the contact surfaces 3.23 being connected to 3.43, 3.24 to 3.44 and 3.25 to 3.25.
  • the Figures 14a to 14b show another embodiment of a plasma gas guide part 3.
  • the Figures 14c and 14d show a part 3.3 of the plasma gas guide part 3.
  • Part 3.2 consists of an electrically non-conductive and heat-conductive material
  • part 3.3 consists of an electrically non-conductive and heat-non-conductive material
  • openings 3.1 which can be radially offset and/or radially inclined to the center line M and through which a plasma gas PG flows when the plasma gas guide part 3 is installed in the plasma cutting torch 1 (see Figures 1 to 9 ).
  • the part 3.3 has more radially arranged holes 3.9, which are larger than the holes 3.1.
  • the parts 3.2 have a diameter d3 and a length 13 which is at least as large as half the difference between the diameters d10 and d20 of part 3.3. It is even better if the length 13 is slightly larger in order to obtain reliable contact between the contact surfaces of the round pins 3.2 and the nozzle 4 and the electrode 2. It is also advantageous if the surface of the contact surfaces 3.61 and 3.51 is not flat, but is adapted to the cylindrical outer surface (contact surface 2.3) of the electrode 2 and the cylindrical inner surface (contact surface 4.3) of the nozzle 4 in such a way that a form fit is created.
  • thermal resistances or thermal conductivities of the plasma gas guide part 3 can be achieved by changing the number or the diameter of the round pins 3.2.
  • thermal resistance is advantageous. For example, the manufacturing costs are reduced if fewer holes have to be drilled and fewer round pins have to be used.
  • FIGS Figures 15 to 17 show (further) different embodiments of an insulating part designed as a secondary gas guide part 7 for a secondary gas SG, which is used in a plasma cutting torch 1, as is shown in FIGS Figures 6 to 9 shown, wherein each figure lettered "a” shows a partially sectional plan view and each figure lettered "b” shows a sectional side view.
  • FIGS Figures 15a and 15b show a secondary gas guide part 7 for a secondary gas SG, as in a plasma cutting torch according to FIGS Figures 6 to 9 can be used.
  • the secondary gas routing part 7 shown consists of an electrically non-conductive and thermally highly conductive material, here for example ceramic.
  • Aluminum nitride which has very good thermal conductivity (approx. 180 W/(m ⁇ K)) and high specific electrical resistance (approx. 10 12 ⁇ ⁇ cm), is particularly suitable here. Due to the low thermal resistance and the high thermal conductivity, high temperature differences can be avoided and the mechanical stresses caused by this in the plasma cutting torch can be reduced.
  • the secondary gas guide part 7 there are radially arranged bores 7.1, which can also be radially or radially offset and/or radially inclined to the center line M and through which the secondary gas SG can flow or flows when the secondary gas guide part 7 is installed in the plasma cutting torch 1.
  • 12 bores are radially offset by a dimension a11 and distributed equidistantly around the circumference, with the angle enclosed by the center points of the bores being denoted by ⁇ 11.
  • the secondary gas routing part 7 has two annular contact surfaces 7.4 and 7.5.
  • the electrical insulation between the nozzle cap 8 and the nozzle cap 5 and thus also the nozzle 4 of the Figures 6 to 9 plasma cutting torch 1 shown is reached.
  • the electrical insulation in combination with the secondary gas, protects the nozzle 4, the nozzle cap 5 and the nozzle protection cap 8 from arcs that can form between them and the workpiece (not shown). These are referred to as double arcs and can damage the nozzle 4, nozzle cap 5 and nozzle protection cap 8.
  • FIGS. 16a and 16b also show a secondary gas routing part 7 for a secondary gas SG, which consists of two parts.
  • a first part 7.2 consists of an electrically non-conductive material with good heat conductivity, while a second part 7.3 consists of a material with good electrical conductivity and heat conductivity.
  • ceramic is again used as an example of aluminum nitride, which has very good thermal conductivity (approx. 180 W/(m * K)) and a high specific electrical resistance (approx. 10 12 ⁇ * cm). used.
  • a metal such as silver, copper, aluminum, tin, zinc, iron, alloyed steel or a metallic alloy (e.g. brass) is used here, in which these metals are used individually or in total at least are used to 50%.
  • the thermal conductivity of the secondary gas routing part 7 is greater than if it were made only of electrically non-conductive and heat-conductive material, such as aluminum nitride.
  • electrically non-conductive and heat-conductive material such as aluminum nitride.
  • copper has a higher thermal conductivity (max. approx. 390 W/(m ⁇ K)) than aluminum nitride (approx. 180 W/(m ⁇ K)), which is currently one of the best thermally conductive and at the same time non-electrical good conductive materials. Due to the better conductivity, this leads to an even better heat exchange between the nozzle protective cap 8 and the nozzle cap 5 of the plasma cutting torch 1 of FIG Figures 6 to 9 .
  • parts 7.2 and 7.3 are connected by sliding contact surfaces 7.21 and 7.31 over one another.
  • the parts 7.2 and 7.3 can also be non-positively connected by the contact surfaces 7.20 with 7.30, 7.21 with 7.31 and 7.22 with 7.32 which are pressed against one another and lie opposite one another and touch.
  • the contact surfaces 7.20, 7.21 and 7.22 are contact surfaces of part 7.2 and the contact surfaces 7.30, 7.31 and 7.32 are contact surfaces of part 7.3.
  • the cylindrical contact surfaces 7.31 (cylindrical outer surface of part 7.3) and 7.21 (cylindrical inner surface of part 7.2) form a non-positive connection by being pressed together.
  • an interference fit DIN EN ISO 286 e.g. H7/n6; H/m6 is used between the cylindrical inner and outer surfaces.
  • twelve bores 7.1 are made of metal in part 7.3, which have a radial offset a11 and are distributed equidistantly at an angle ⁇ 11 on the circumference of the gas duct.
  • a wide variety of shapes, such as grooves, recesses, bores, etc., can also be produced more easily if they are made in the metal.
  • the Figures 17a and 17b also show a secondary gas routing part 7 for a secondary gas SG, which consists of two parts.
  • a first part 7.2 consists of an electrically well conductive and heat conductive material and a second part 7.3 consists of an electrically non-conductive and heat conductive material.
  • the same comments apply as for the Figures 16a and 6b.
  • 18a, 18b , 18c and 18d is a further embodiment of a secondary gas guide part 7 for a secondary gas SG, which is in a plasma cutting torch according to Figures 6 to 9 can be used, shown.
  • the 18a shows a top view and the Figure 18b and 18c sectional side views of different embodiments of the same.
  • Figure 18d shows a part 7.3 of the secondary gas routing part 7 made of electrically non-conductive and heat non-conductive material.
  • bores 7.1 which can also be radially or radially offset and/or radially inclined to the center line M and through which the secondary gas SG can flow when the secondary gas guide part 7 is installed in the plasma cutting torch 1.
  • twelve bores are radially offset by a dimension a11 and are distributed equidistantly around the circumference, with the angle enclosed by the center points of the bores being denoted by ⁇ 11 (here, for example, 30°).
  • ⁇ 11 here, for example, 30°
  • Figure 18d shows that in this example the part 7.3 has twelve further axially arranged bores 7.9 which are larger than the bores or openings 7.1.
  • contact surfaces 7.51 of the round pins 7.2 are in contact with a contact surface 5.3 (here, for example, an annular surface) of the nozzle cap 5 and contact surfaces 7.41 of the round pins 7.2 with a contact surface 8.2 (here, for example, an annular surface) of the nozzle protection cap by touching ( Figures 6 to 9 ).
  • the parts 7.2 have a diameter d7 and a length l7 which is at least as large as the width b of the part 7.3. It is even better if the length 17 is slightly larger in order to obtain reliable contact between the contact surfaces of the round pins 7.2 and the nozzle cap 5 and the nozzle protection cap 8.
  • the 18c shows another embodiment of the secondary gas guiding part 7 for secondary gas.
  • two parts 7.2 and 7.6, which are given as round pins by way of example, are introduced into each bore 7.9.
  • the part 7.3 consists of an electrically non-conductive and thermally non-conductive material
  • the round pins 7.2 consist of an electrically non-conductive and heat-conductive material
  • the round pins 7.6 consist of an electrically highly conductive and heat-conductive material.
  • contact surfaces 7.51 of the round pins 7.2 are in contact with a contact surface 5.3 (here for example the circular ring surface) of the nozzle cap 5 and contact surfaces 7.41 of the round pins 7.6 with a contact surface 8.2 (here for example the circular ring surface) of the nozzle protection cap 8 by touch (see also Figures 6 to 9 ).
  • Both round pins 7.2 and 7.6 are connected by touch through their contact surfaces 7.42 and 7.52.
  • the parts 7.2 have a diameter d7 and a length 171.
  • the parts 7.6 have the same diameter and a length l72, the sum of the lengths 171 and l72 being at least as large as the width b of the part 7.3. It is even better if the sum of the lengths is slightly larger, for example larger than 0.1 mm to obtain a secure contact between the contact surfaces 7.51 of the round pins 7.2 and the nozzle cap 5 and the contact surfaces 7.41 of the round pins 7.6 and the nozzle protection cap 8.
  • the present invention thus also relates in generalized form to an insulating part for a plasma torch, in particular a plasma cutting torch, for electrical insulation between at least two electrically conductive components of the plasma torch, the insulating part consisting of at least three parts, one of the parts consists of an electrically non-conductive and heat-conductive material, another of the parts consists of an electrically non-conductive and thermally non-conductive material and the other or another of the parts consists of an electrically well-conductive and heat-conductive material.
  • Secondary gas guide parts 7 shown can also be used in a plasma cutting torch 1 according to figure 5 be used.
  • the electrical insulation between the nozzle protective cap 8 and the nozzle 4 is realized there by using this secondary gas routing part 7 .
  • the electrical insulation protects the nozzle 4 and the nozzle protective cap 8 from arcs that can form between them and a workpiece. These are referred to as double arcs and can damage the nozzle 4 and the nozzle protection cap 8.
  • FIGS Figures 19a to 19d show sectional views of arrangements of a nozzle 4 and a secondary gas guide part 7 for a secondary gas SG according to special embodiments of the invention in FIGS Figures 15 to 18 .
  • Figure 19a an arrangement with a secondary gas guide part 7 according to Figures 15a and 15b
  • Figure 19b an arrangement with a secondary gas routing part according to the 16a and 16b
  • Figure 19c an arrangement with a secondary gas routing part according to the Figure 17a and 17b and Figure 19d according to an arrangement with a secondary gas routing part Figures 18a and 18b .
  • the secondary gas routing part 7 can be connected to the nozzle 4 in the simplest case by pushing them one over the other. However, they can also be connected in a positive and non-positive manner or by gluing. When using metal/metal and/or metal/ceramic at the connection point, soldering is also possible as a connection.
  • FIGS Figures 15 to 18 show sectional views of arrangements of a nozzle cap 5 and a secondary gas guide part 7 for a secondary gas SG according to FIGS Figures 15 to 18 according to particular embodiments of the invention.
  • the comments on the apply here Figures 6 to 9 and to the Figures 15 to 18 .
  • Figure 20a an arrangement with a secondary gas routing part according to the Figures 15a and 15b ;
  • Figure 20b an arrangement with a secondary gas routing part according to the 16a and 16b ;
  • Figure 20c according to an arrangement with a secondary gas routing part Figure 17a and 17b and
  • Figure 20d an arrangement with a secondary gas routing part according to the Figures 18a to 18d .
  • the secondary gas routing part 7 can be connected to the nozzle cap 5 in the simplest case by sliding them over one another. However, they can also be connected in a positive and non-positive manner or by gluing. When using metal/metal and/or metal/ceramic at the connection point, soldering is also possible as a connection.
  • FIGS Figures 21a to 21d show sectional views of arrangements of a nozzle protection cap 8 and a secondary gas routing part 7 for a secondary gas SG according to FIGS Figures 15 to 18 .
  • Figure 21a an arrangement with a secondary gas routing part according to the Figures 15a and 15b
  • Figure 21b an arrangement with a secondary gas routing part according to the 16a and 16b
  • Figure 21c an arrangement with a secondary gas routing part according to the Figure 17a and 17b
  • Figure 21d an arrangement with a secondary gas routing part according to the Figures 18a to 18d .
  • the secondary gas routing part 7 can be connected to the nozzle protection cap 8 in the simplest case by sliding them over one another. she but can also be connected in a positive and non-positive manner or by gluing. When using metal/metal and/or metal/ceramic at the connection point, soldering is also possible as a connection.
  • FIGS Figures 22a and 22b show arrangements of an electrode 2 and a plasma gas guide part 3 for a plasma gas PG according to FIGS Figures 11 to 13 according to particular embodiments of the invention.
  • a contact surface 2.3 is, for example, a cylindrical outer surface of the electrode 2 and a contact surface 3.5 is a cylindrical inner surface of the plasma gas guide part 3.
  • a loose fit with little play for example H7/h6 according to DIN EN ISO 286, is preferably used here between the cylindrical inner and Outer surface used to on the one hand the nesting and on the other hand to realize a good contact and thus low thermal resistance and thus good heat transfer. The heat transfer can be improved by applying thermal paste to these contact surfaces. Then a fit with more play, for example H7/g6, can be used.
  • the 23 shows an arrangement of an electrode 2 and a plasma gas guide part 3 for a plasma gas PG according to a particular embodiment of the present invention.
  • contact surfaces 3.51 of the round pins 3.2 of the plasma gas guide part 3 are in contact with a contact surface 2.3 (here, for example, a cylindrical outer surface) of the electrode 2 (see also Figures 1 to 9 ).
  • the parts 3.2 have a diameter d3 and a length 13 which is at least as large as half the difference between the diameters d10 and d20 of part 3.3. It is even better if the length 13 is slightly larger in order to obtain reliable contact between the contact surfaces of the round pins 3.2 and the nozzle 4 and the electrode 2. It is also advantageous if the surface of the contact surfaces 3.61 and 3.51 is not flat, but is adapted to the cylindrical outer surface (contact surface 2.3) of the electrode 2 and the cylindrical inner surface (contact surface 4.3) of the nozzle in such a way that a form fit is created.
  • cooling liquid or the like this is intended to mean a cooling medium in general.

Landscapes

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

Claims (23)

  1. Pièce isolante pour torche à plasma à arc en plusieurs parties destinée à l'isolation électrique entre au moins deux composants électriquement conducteurs d'une torche à plasma à arc, caractérisée en ce qu'elle comprend au moins deux parties (3.2, 3.3 ; 7.2, 7.3 ; 11.1, 11.2), l'une des parties (3.2 ; 7.2 ; 11.1) étant en un matériau électriquement non conducteur et ayant une bonne conductivité thermique et l'autre ou au moins une autre des parties (3.3 ; 7.3 ; 11.2) étant en un matériau non thermoconducteur et électriquement non conducteur, le matériau électriquement non conducteur et ayant une bonne conductivité thermique ayant une conductivité thermique d'au moins 40 W/(m*K), de préférence d'au moins 60 W/(m*K) et plus préférablement d'au moins 90 W/(m*K), encore plus préférablement d'au moins 120 W/(m*K), encore plus préférablement d'au moins 150 W/(m*K) et encore plus préférablement d'au moins 180 W/(m*K).
  2. Pièce isolante pour torche à plasma à arc selon la revendication 1, caractérisée en ce que la partie (3.2) en matériau électriquement non conducteur et ayant une bonne conductivité thermique comporte au moins une surface qui sert de surface de contact (3.51, 3.61, 7.41, 7.51) et qui est alignée avec une surface immédiatement adjacente de la partie (3.3, 7.3) en matériau non thermoconducteur et électriquement non conducteur ou qui fait saillie de celle-ci.
  3. Pièce isolante pour torche à plasma à arc en plusieurs parties destinée l'isolation électrique entre au moins deux composants électriquement conducteurs d'une torche à plasma à arc, caractérisée en ce qu'elle comprend au moins deux parties (3.2, 3.3 ; 7.2, 7.3), l'une des parties (3.3 ; 7.3) étant en un matériau ayant une bonne conductivité électrique et thermique et l'autre (3.2 ; 7.2) ou au moins une autre des parties étant en un matériau électriquement non conducteur et ayant une bonne conductivité thermique, le matériau ayant une bonne conductivité électrique et thermique ayant une conductivité thermique d'au moins 40 W/(m*K)Ω), de préférence d'au moins 60 W/(m*K) et plus préférablement d'au moins 90 W/(m*K), plus préférablement d'au moins 120 W/(m*K), encore plus préférablement d'au moins 150 W/(m*K) et encore plus préférablement d'au moins 180 W/(m*K), et une résistivité électrique d'au plus 0,01 Ω*cm et le matériau électriquement non conducteur et ayant une bonne conductivité thermique ayant une conductivité thermique d'au moins 40 W/(m*K), de préférence d'au moins 60 W/(m*K) et plus préférablement d'au moins 90 W/(m*K), encore plus préférablement d'au moins 120 W/(m*K), encore plus préférablement d'au moins 150 W/(m*K) et encore plus préférablement d'au moins 180 W/(m*K).
  4. Pièce isolante pour torche à plasma à arc en plusieurs parties destinée à l'isolation électrique entre au moins deux composants électriquement conducteurs d'une torche à plasma à arc, caractérisée en ce qu'elle comprend au moins trois parties (7.2, 7.3, 7.6), l'une des parties (7.6) étant en un matériau ayant une bonne conductivité électrique et thermique, une autre des parties (7.2) étant en un matériau électriquement non conducteur et ayant une bonne conductivité thermique et une autre des parties (7.3) étant en un matériau électriquement non conducteur et non thermoconducteur, le matériau ayant une bonne conductivité électrique et thermique ayant une conductivité thermique d'au moins 40 W/(m*K)Ω et une résistivité électrique d'au plus 0,01 Ω*cm et le matériau électriquement non conducteur et ayant une bonne conductivité thermique ayant une conductivité thermique d'au moins 40 W/(m*K), de préférence d'au moins 60 W/(m*K) et plus préférablement d'au moins 90 W/(m*K), encore plus préférablement d'au moins 120 W/(m*K), encore plus préférablement d'au moins 150 W/(m*K) et encore plus préférablement d'au moins 180 W/(m*K).
  5. Pièce isolante pour torche à plasma à arc selon l'une des revendications précédentes, caractérisée en ce que le matériau électriquement non conducteur et ayant une bonne conductivité thermique et/ou le matériau électriquement non conducteur et non thermoconducteur ont une résistivité électrique d'au moins 106 Ω*cm, de préférence d'au moins 1010 Ω*cm, et/ou une rigidité diélectrique d'au moins 7 kV/mm, de préférence d'au moins 10 kV/mm.
  6. Pièce isolante pour torche à plasma à arc selon l'une des revendications précédentes, caractérisée en ce que le matériau électriquement non conducteur et ayant une bonne conductivité thermique est une céramique ou une matière synthétique.
  7. Pièce isolante pour torche à plasma à arc selon la revendication 2, ou une revendication qui en dépend directement ou indirectement, caractérisée en ce que le matériau électriquement non conducteur et non thermoconducteur a une conductivité thermique d'au plus 1 W/(m*K).
  8. Pièce isolante pour torche à plasma à arc selon l'une des revendications précédentes, caractérisée en ce que les parties sont reliées les unes aux autres par une liaison par complémentarité de formes, en force, de matière et/ou par collage ou par un procédé thermique.
  9. Pièce isolante pour torche à plasma à arc selon l'une des revendications précédentes, caractérisée en ce qu'elle comporte au moins une ouverture.
  10. Pièce isolante pour torche à plasma à arc selon l'une des revendications précédentes, caractérisée en ce qu'elle comporte au moins un évidement ou en ce qu'elle comporte au moins une rainure (3.8) ou en ce qu'elle est destinée à guider un gaz, notamment un gaz plasma, secondaire ou de refroidissement.
  11. Ensemble comprenant une électrode de torche à plasma à arc (2) ou une buse de torche à plasma à arc (4) ou un capuchon de buse de torche à plasma à arc (5) ou un capuchon de protection de buse de torche à plasma à arc (8) ou un support de capuchon de protection de buse de torche à plasma à arc (9) et une pièce isolante pour torche à plasma à arc selon l'une des revendications précédentes.
  12. Ensemble selon la revendication 11, caractérisé en ce que la pièce isolante pour torche à plasma à arc est en contact direct avec l'électrode de torche à plasma à arc (2) et/ou la buse de torche à plasma à arc (4) ou le capuchon de buse de torche à plasma à arc (5) ou le capuchon de protection de buse de torche à plasma à arc (8) ou le support de capuchon de protection de torche à plasma à arc (9).
  13. Ensemble comprenant un logement (11) pour support de capuchon de protection de buse de torche à plasma à arc (9) et un support de capuchon de protection de buse de torche à plasma à arc (9), le logement (11) pour support de capuchon de protection de buse de torche à plasma à arc (9) étant conçu comme une pièce isolante pour torche à plasma à arc selon l'une des revendications 1 à 10.
  14. Ensemble comprenant une électrode de torche à plasma à arc (2) et une buse de torche à plasma à arc (4), une pièce isolante pour torche à plasma à arc selon l'une des revendications 1 à 10, conçue sous la forme d'une pièce de guidage de gaz à plasma à arc (3), étant disposée entre l'électrode de torche à plasma à arc (2) et la buse de torche à plasma à arc (4).
  15. Ensemble comprenant une buse de torche à plasma à arc (4) et un capuchon de protection de buse de torche à plasma à arc (8), une pièce isolante pour torche à plasma à arc selon l'une des revendications 1 à 10, conçue comme pièce de guidage de gaz secondaire (7), étant disposée entre la buse de torche à plasma à arc (4) et le capuchon de protection de buse de torche à plasma à arc (8).
  16. Ensemble comprenant un capuchon de buse de torche à plasma à arc (5) et un capuchon de protection de buse de torche à plasma à arc (8), une pièce isolante pour torche à plasma à arc selon l'une des revendications 1 à 10, conçue sous la forme d'une pièce de guidage de gaz secondaire (7), étant disposée entre le capuchon de buse de torche à plasma à arc (5) et le capuchon de protection de buse de torche à plasma à arc (8).
  17. Torche à plasma à arc, notamment torche de découpage à plasma à arc (1), comprenant au moins une pièce isolante pour torche à plasma à arc selon l'une des revendications 1 à 10.
  18. Torche à plasma à arc selon la revendication 17, caractérisée en ce que la partie isolante pour torche à plasma à arc ou une partie de celle-ci en un matériau électriquement non conducteur et ayant une bonne conductivité thermique comporte au moins une surface qui sert de surface de contact et qui est en contact direct au moins avec une surface d'un composant, ayant une bonne conductivité électrique, de la torche à plasma à arc, le composant ayant une bonne conductivité électrique ayant une résistivité électrique d'au plus 0,01 Ω*cm.
  19. Torche à plasma à arc selon l'une des revendications 17 et 18, caractérisée en ce que la pièce isolante pour torche à plasma à arc est une pièce de guidage de gaz.
  20. Torche à plasma à arc selon l'une des revendications 17 à 19, caractérisée en ce que la partie isolante pour torche à plasma à arc comporte au moins une surface qui est en contact direct avec un milieu de refroidissement pendant le fonctionnement.
  21. Torche à plasma à arc, notamment torche de découpage à plasma à arc (1), comprenant au moins un ensemble selon l'une des revendications 11 à 16.
  22. Procédé de traitement d'une pièce avec un plasma thermique ou de découpage à plasma à arc ou de soudage à plasma à arc, caractérisé en ce qu'on utilise une torche à plasma à arc selon l'une des revendications 16 à 21.
  23. Procédé selon la revendication 22, caractérisé en ce qu'un faisceau d'un laser est injecté par couplage dans la torche à plasma à arc en plus du faisceau plasma.
EP13004796.2A 2013-05-16 2013-10-04 Pièce isolante en plusieurs parties pour une torche à arc plasma, torche et agencements associés dotés de celle-ci et procédé associé Active EP2804450B1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
CA2910221A CA2910221C (fr) 2013-05-16 2014-07-04 Piece isolante en une ou plusieurs parties pour un chalumeau a plasma, en particulier un chalumeau de coupe a plasma, ainsi que dispositifs et chalumeaux a plasma pourvus de celle-ci
PCT/IB2014/001275 WO2014184656A2 (fr) 2013-05-16 2014-07-04 Pièce isolante en une ou plusieurs parties pour un chalumeau à plasma, en particulier un chalumeau de coupe à plasma, ainsi que dispositifs et chalumeaux à plasma pourvus de celle-ci
JP2016513457A JP6643979B2 (ja) 2013-10-04 2014-07-04 プラズマ切断トーチ用の複数部分からなる絶縁部分、ならびにそれを有するアセンブリおよびプラズマ切断トーチ
BR112015028734-4A BR112015028734B1 (pt) 2013-10-04 2014-07-04 Peça isolante de uma ou mais partes para uma tocha de arco por plasma, em particular, uma tocha de corte por plasma e disposições e tochas de plasma tendo a mesma
US14/890,615 US10485086B2 (en) 2013-05-16 2014-07-04 Single or multi-part insulating component for a plasma torch, particularly a plasma cutting torch, and assemblies and plasma torches having the same
CN201480027298.3A CN105230131B (zh) 2013-05-16 2014-07-04 用于等离子体炬且尤其是等离子体割炬的单件或多件式绝缘构件及具有该绝缘构件的组件和等离子体炬
KR1020157035646A KR102054543B1 (ko) 2013-05-16 2014-07-04 플라즈마 토치, 특히 플라즈마 절단 토치의 단일 또는 다수-부분의 절연 부품, 및 이를 가지는 플라즈마 토치와 조립체
MX2015015427A MX370068B (es) 2013-05-16 2014-07-04 Componente aislante de una o varias partes para un soplete de plasma, en particular un soplete cortador de plasma, y montajes y sopletes de plasma que lo comprenden.
RU2015153934A RU2691729C2 (ru) 2013-05-16 2014-07-04 Монолитная или составная изолирующая деталь для плазменной горелки, в частности горелки для плазменной резки, а также устройство и плазменная горелка с этим устройством
ZA2015/08161A ZA201508161B (en) 2013-05-16 2015-11-04 Single or multi-part insulating component for a plasma torch, particularly a plasma cutting torch, and assemblies and plasma torches having the same
US16/550,845 US20200015345A1 (en) 2013-05-16 2019-08-26 Single or multi-part insulating component for a plasma torch, particularly a plasma cutting torch, and assemblies and plasma torches having the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013008353 2013-05-16

Publications (3)

Publication Number Publication Date
EP2804450A2 EP2804450A2 (fr) 2014-11-19
EP2804450A3 EP2804450A3 (fr) 2014-12-17
EP2804450B1 true EP2804450B1 (fr) 2022-05-04

Family

ID=49303695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13004796.2A Active EP2804450B1 (fr) 2013-05-16 2013-10-04 Pièce isolante en plusieurs parties pour une torche à arc plasma, torche et agencements associés dotés de celle-ci et procédé associé

Country Status (11)

Country Link
US (2) US10485086B2 (fr)
EP (1) EP2804450B1 (fr)
KR (1) KR102054543B1 (fr)
CN (1) CN105230131B (fr)
CA (1) CA2910221C (fr)
ES (1) ES2923761T3 (fr)
MX (1) MX370068B (fr)
PL (1) PL2804450T3 (fr)
RU (1) RU2691729C2 (fr)
WO (1) WO2014184656A2 (fr)
ZA (1) ZA201508161B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2942144A1 (fr) * 2014-05-07 2015-11-11 Kjellberg-Stiftung Système de brûleur pour découpage au jet plasma et utilisation de pièces d'usure pour un système de brûleur pour découpage au jet de plasma
JP6522967B2 (ja) 2015-01-30 2019-05-29 株式会社小松製作所 プラズマトーチ用センタパイプ、接触子、電極、及びプラズマトーチ
JP6636249B2 (ja) * 2015-01-30 2020-01-29 株式会社小松製作所 プラズマトーチ用交換部品ユニット
JP6522968B2 (ja) * 2015-01-30 2019-05-29 株式会社小松製作所 プラズマトーチ用絶縁ガイド、及び交換部品ユニット
DE102016219350A1 (de) * 2016-10-06 2018-04-12 Kjellberg-Stiftung Düsenschutzkappe, Lichtbogenplasmabrenner mit dieser Düsenschutzkappe sowie eine Verwendung des Lichtbogenplasmabrenners
KR20180086669A (ko) 2017-01-23 2018-08-01 에드워드 코리아 주식회사 질소 산화물 감소 장치 및 가스 처리 장치
KR102646623B1 (ko) * 2017-01-23 2024-03-11 에드워드 코리아 주식회사 플라즈마 발생 장치 및 가스 처리 장치
US20200131652A1 (en) * 2017-06-15 2020-04-30 Obshchestvo S Ogranichennoy Otvetstvennost'yu "Obedinennaya Kompaniya Rusal Inzhenernotekhnologiches Method and device for electrolyte crust breaking by separation plasma cutting
US20210037635A1 (en) * 2018-02-20 2021-02-04 Oerlikon Metco (Us) Inc. Single arc cascaded low pressure coating gun utilizing a neutrode stack as a method of plasma arc control
JP2023501045A (ja) * 2019-09-12 2023-01-18 シェルベリ－シュティフトゥング アークトーチ、プラズマトーチまたはプラズマ切断トーチ用の消耗部材、ならびに該消耗部材を備えたアークトーチ、プラズマトーチおよびプラズマ切断トーチ、およびプラズマ切断する方法、ならびにアークトーチ、プラズマトーチまたはプラズマ切断トーチ用の電極を製造する方法
US10978225B1 (en) 2020-03-12 2021-04-13 Lawrence Livermore National Security, Llc High-voltage insulator having multiple materials
KR20230068789A (ko) * 2021-11-11 2023-05-18 삼성에스디아이 주식회사 레이저 용접 노즐

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008748A1 (fr) * 1992-10-20 1994-04-28 Kabushiki Kaisha Komatsu Seisakusho Torche a plasma

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4872053A (fr) * 1971-12-30 1973-09-28
EP0094984A1 (fr) * 1982-07-12 1983-11-30 Manfred J. Wallner Chalumeau soudeur ou coupeur à l'arc
US4659899A (en) * 1984-10-24 1987-04-21 The Perkin-Elmer Corporation Vacuum-compatible air-cooled plasma device
JP2640707B2 (ja) * 1991-02-28 1997-08-13 株式会社小松製作所 切断用プラズマトーチ
US5393952A (en) * 1991-02-28 1995-02-28 Kabushiki Kaisha Komatsu Seisakusho Plasma torch for cutting use with nozzle protection cap having annular secondary GPS passage and insulator disposed in the secondary gas passage
JP3260018B2 (ja) * 1993-09-22 2002-02-25 小池酸素工業株式会社 プラズマ切断トーチ
AT405472B (de) * 1997-03-04 1999-08-25 Bernhard Dr Platzer Verfahren und vorrichtung zum erzeugen eines plasmas
US5906758A (en) * 1997-09-30 1999-05-25 The Esab Group, Inc. Plasma arc torch
RU2145536C1 (ru) * 1998-04-07 2000-02-20 Акционерное общество открытого типа "Научно-исследовательский технологический институт" (АО "НИТИ-ТЕСАР") Плазмотрон для воздушно-плазменной резки
FR2777214B1 (fr) * 1998-04-09 2000-05-19 Soudure Autogene Francaise Torche et procede de coupage ou soudage a l'arc electrique
JP2000082774A (ja) * 1998-06-30 2000-03-21 Sumitomo Electric Ind Ltd パワ―モジュ―ル用基板およびその基板を用いたパワ―モジュ―ル
JP2000052043A (ja) * 1998-08-05 2000-02-22 Koike Sanso Kogyo Co Ltd プラズマトーチ
US6320156B1 (en) * 1999-05-10 2001-11-20 Komatsu Ltd. Plasma processing device, plasma torch and method for replacing components of same
JP3625040B2 (ja) * 1999-08-11 2005-03-02 株式会社小松製作所 プラズマ加工機、プラズマトーチ及びその部品の着脱方法
AU2002237179B2 (en) * 2001-02-27 2007-01-18 Yantai Longyuan Power Technology Co., Ltd. Assembled cathode and plasma igniter with such cathode
EP1506699A2 (fr) * 2001-05-03 2005-02-16 Apit Corp. SA Procede et dispositif de generation d'un rideau de gaz active pour traitement de surface
RU2295206C9 (ru) * 2001-10-05 2007-10-27 Текна Плазма Системз,Инк.Канада Многокатушечная индукционная плазменная горелка с твердотельным источником питания
JP3652350B2 (ja) * 2002-12-17 2005-05-25 コマツ産機株式会社 プラズマ加工方法
US7829816B2 (en) * 2005-04-19 2010-11-09 Hypertherm, Inc. Plasma arc torch providing angular shield flow injection
WO2006118003A1 (fr) * 2005-04-28 2006-11-09 Hitachi Metals, Ltd. Substrat de nitrure de silicium, son procédé de fabrication, et carte de circuit imprimé en nitrure de silicium et module semi-conducteur l'utilisant
US8101882B2 (en) * 2005-09-07 2012-01-24 Hypertherm, Inc. Plasma torch electrode with improved insert configurations
FR2914369B1 (fr) * 2007-03-30 2014-02-07 Snecma Allumeur electrolytique pour moteur-fusee a monergol
JP5413218B2 (ja) * 2010-01-27 2014-02-12 Ｊｆｅエンジニアリング株式会社 中空電極アーク・レーザ同軸複合溶接方法
US9605376B2 (en) * 2011-06-28 2017-03-28 Mtix Ltd. Treating materials with combined energy sources
WO2013130046A2 (fr) * 2012-02-28 2013-09-06 Sulzer Metco (Us), Inc. Pistolet à plasma en cascade étendu

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008748A1 (fr) * 1992-10-20 1994-04-28 Kabushiki Kaisha Komatsu Seisakusho Torche a plasma

Also Published As

Publication number Publication date
RU2015153934A3 (fr) 2018-03-01
PL2804450T3 (pl) 2022-12-19
MX2015015427A (es) 2016-08-04
WO2014184656A2 (fr) 2014-11-20
US20200015345A1 (en) 2020-01-09
RU2691729C2 (ru) 2019-06-18
CA2910221A1 (fr) 2014-11-20
ES2923761T3 (es) 2022-09-30
EP2804450A2 (fr) 2014-11-19
CN105230131B (zh) 2018-10-09
KR102054543B1 (ko) 2020-01-22
US10485086B2 (en) 2019-11-19
EP2804450A3 (fr) 2014-12-17
ZA201508161B (en) 2017-05-31
US20160120014A1 (en) 2016-04-28
KR20160053847A (ko) 2016-05-13
RU2015153934A (ru) 2017-06-21
WO2014184656A3 (fr) 2015-01-22
MX370068B (es) 2019-11-29
CN105230131A (zh) 2016-01-06
CA2910221C (fr) 2021-11-09

Similar Documents

Publication Publication Date Title
EP2804450B1 (fr) Pièce isolante en plusieurs parties pour une torche à arc plasma, torche et agencements associés dotés de celle-ci et procédé associé
DE2025368C3 (de) Elektrischer Lichtbogenbrenner
DE102009016932B4 (de) Kühlrohre und Elektrodenaufnahme für einen Lichtbogenplasmabrenner sowie Anordnungen aus denselben und Lichtbogenplasmabrenner mit denselben
EP2465334B1 (fr) Capot de protection de buse et porte-capot de protection de buse ainsi que torche à plasma équipée de l'un et/ou de l'autre
DE102008018530B4 (de) Düse für einen flüssigkeitsgekühlten Plasmabrenner, Anordnung aus derselben und einer Düsenkappe sowie flüssigkeitsgekühlter Plasmabrenner mit einer derartigen Anordnung
DE102011088433A1 (de) Verfahren und Plasmalichtbogenbrennersystem zum Markieren und Schneiden von Werkstücken mit dem selben Satz an Hilfsstoffen
EP2210455B1 (fr) Electrode pour torche a plasma
EP2855071B1 (fr) Chalumeau pour le soudage au tungstène et au gaz inerte
EP2849542B1 (fr) Structure d'électrodes pour torches de coupage au plasma
WO2018229308A2 (fr) Électrodes pour torches à plasma refroidies par gaz et liquide, agencement d'une électrode et d'un tube de refroidissement, guidage des gaz, torche à plasma, procédé de guidage des gaz dans une torche à plasma et procédé pour faire fonctionner une torche à plasma
EP2667689B1 (fr) Électrode pour chalumeau de coupe au plasma ainsi que son utilisation
EP2457681B1 (fr) Torche pour le soudage au gaz inerte et électrode tungstène et électrode destinée à être utilisée dans une telle torche
DE102017121722B4 (de) Brennerkörper zum thermischen Fügen, Brenner mit Brennerkörper und Fügevorrichtung
DE102019100581A1 (de) Gasdüse zum Ausströmen eines Schutzgasstromes und Brennerhals mit einer Gasdüse
WO2021063670A1 (fr) Dispositif de projection arc-fil
DE102009031857A1 (de) Düse für einen flüssigkeitsgekühlten Plasmabrenner sowie Plasmabrennerkopf mit derselben
WO2024068182A1 (fr) Composant tel qu'une pièce d'usure pour une torche à arc, en particulier un brûleur à plasma ou une torche de découpe au plasma, torche à arc le comprenant, et procédé de découpe au plasma
WO2021047708A2 (fr) Pièce d'usure pour chalumeau à arc et chalumeau à plasma et chalumeau à arc et chalumeau à plasma comprenant cette pièce d'usure et procédé de découpage au plasma et procédé de fabrication d'une électrode pour un chalumeau à arc et un chalumeau à plasma
DE102020125073A1 (de) Elektrode für einen Plasmaschneidbrenner, Anordnung mit derselben, Plasmaschneidbrenner mit derselben sowie Verfahren zum Plasmaschneiden
DE102018125772A1 (de) Verbindungsteil für einen Bearbeitungskopf zur thermischen Materialbearbeitung, insbesondere für einen Plasmabrennerkopf, Laserkopf, Plasma-Laser-Kopf sowie ein Verschleißteil und eine Verschleißteilhalterung und ein Verfahren zum Fügen dieser
DE2422322C3 (de) Elektrode für einen Plasmabrenner
DE10327911B4 (de) Plasma-MIG/MAG-Schweißbrenner
DE3136799C2 (de) Plasmalichtbogenofen
DE2033072C (de) Lichtbogen-Plasmabrenner mit einer gekühlten Kathode und gekühlten Anode

Legal Events

Date Code Title Description
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

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

17P Request for examination filed

Effective date: 20131004

AK Designated contracting states

Kind code of ref document: A2

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

AK Designated contracting states

Kind code of ref document: A3

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

RIC1 Information provided on ipc code assigned before grant

Ipc: H05H 1/34 20060101AFI20141110BHEP

R17P Request for examination filed (corrected)

Effective date: 20150616

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KJELLBERG-STIFTUNG

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20200117

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

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: 20210622

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

Owner name: KJELLBERG-STIFTUNG

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

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

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20211119

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

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1490570

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220515

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502013016131

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2923761

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20220930

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: 20220504

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: 20220905

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: 20220804

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: 20220504

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: 20220504

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: 20220805

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: 20220504

Ref country code: BG

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: 20220804

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: 20220504

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: 20220504

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: 20220904

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: 20220504

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: 20220504

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: 20220504

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: 20220504

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502013016131

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: AL

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: 20220504

26N No opposition filed

Effective date: 20230207

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: 20220504

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: 20220504

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Effective date: 20221004

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: 20221004

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

Ref country code: LI

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

Effective date: 20221031

Ref country code: FR

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

Effective date: 20221031

Ref country code: CH

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

Effective date: 20221031

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

Ref country code: IE

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

Effective date: 20221004

Ref country code: GB

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

Effective date: 20221004

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

Ref country code: CZ

Payment date: 20230922

Year of fee payment: 11

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

Ref country code: SK

Payment date: 20230927

Year of fee payment: 11

Ref country code: PL

Payment date: 20230927

Year of fee payment: 11

Ref country code: NL

Payment date: 20231023

Year of fee payment: 11

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1490570

Country of ref document: AT

Kind code of ref document: T

Effective date: 20221004

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

Ref country code: ES

Payment date: 20231117

Year of fee payment: 11

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

Ref country code: AT

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

Effective date: 20221004

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

Ref country code: IT

Payment date: 20231031

Year of fee payment: 11

Ref country code: DE

Payment date: 20231030

Year of fee payment: 11

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

Ref country code: BE

Payment date: 20231023

Year of fee payment: 11

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

Ref country code: HU

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

Effective date: 20131004

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

Ref country code: CY

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: 20220504