EP0933982B1 - Gerät mit einem Plasmaerzeuger - Google Patents

Gerät mit einem Plasmaerzeuger Download PDF

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Publication number
EP0933982B1
EP0933982B1 EP99890002A EP99890002A EP0933982B1 EP 0933982 B1 EP0933982 B1 EP 0933982B1 EP 99890002 A EP99890002 A EP 99890002A EP 99890002 A EP99890002 A EP 99890002A EP 0933982 B1 EP0933982 B1 EP 0933982B1
Authority
EP
European Patent Office
Prior art keywords
anode
cathode
chamber
module
holder
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.)
Expired - Lifetime
Application number
EP99890002A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0933982A3 (de
EP0933982A2 (de
Inventor
Gerhard Schwankhart
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.)
Inocon Technologie GmbH
Original Assignee
Inocon Technologie GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inocon Technologie GmbH filed Critical Inocon Technologie GmbH
Publication of EP0933982A2 publication Critical patent/EP0933982A2/de
Publication of EP0933982A3 publication Critical patent/EP0933982A3/de
Application granted granted Critical
Publication of EP0933982B1 publication Critical patent/EP0933982B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05H1/3478—Geometrical details

Definitions

  • the invention relates to a plasma generator with holder, e.g. for a welding machine, according to the preamble of claim 1.
  • the cathode and the anode is usually connected with terminal connections to connecting cables and mechanically connected to each other via appropriate spacers, which also determine the chamber through which a corresponding gas is supplied to the burning between the anode and the cathode arc.
  • the cathode Due to the inevitable wear of the cathode, this must be reworked after a certain number of operating hours. For this purpose it is necessary to disassemble the plasma generator and to regrind the cathode. Thereafter, the cathode must again be set very accurately with respect to the anode to allow for the intended machining of a workpiece, e.g. the attachment of a weld or the application of a metal layer to perform. These adjustments are associated with a very considerable amount of time and cause significant downtime of the tool and thus production losses.
  • laser devices or electron beam devices e.g. used for welding or cutting, although these are considerably more expensive to manufacture than plasma-working devices, e.g. Welding equipment, and the required preparation of the workpieces to be welded is considerably more expensive, since just laser or electron beams can only generate heat by absorbing, but even no heat radiating, as is the case with the plasma.
  • US Pat. No. 5,328,516 A, US Pat. No. 5,258,599 A and EP 0 079 019 A1 disclose devices in which plasma generators are provided which operate with consuming cathodes and in which the anodes together with the holder are designed as modules and can be handled together are. This module can be removed from a holder, which also has the holder or guide for the consumable cathode.
  • the plasma generator has a very large length. Since, as a rule, the plasma generator is clamped at its end region remote from the nozzle orifice into a receptacle of a welding robot, correspondingly large inaccuracies in the guidance of the machining and the reproducibility, in particular after a change of the module, are decisive due to the unavoidable tolerances the nozzle.
  • the aim of the invention is to avoid these disadvantages and to propose a device with which a largely continuous use with high reproducibility of the settings even after a replacement of a module is possible.
  • the proposed measures make it possible to easily exchange the plasma generator designed as a module in a simple manner. It is sufficient to remove the module from the holder and replace it with a new one. This eliminates the previously required disassembly of the leads, since they are connected to the arranged in the holder pins.
  • the cathode can be set optimized for the intended use and fixed in their position. The latter can be done in any way.
  • the cathode may be operatively connected to the holding member in a non-releasable manner, e.g. be soldered.
  • the proposed measures also make it possible to exchange the plasma generator in a simple and rapid manner. At the same time also results in a very simple construction of the module, whereby the possibility is given to solve the cathode after disassembly of the module from the collet and regrind. It is also possible to make better use of the cathode whose two end portions conical, the cone angle is adapted to the particular application.
  • the adjustment of the cathode can be carried out after a revision of the cathode with a tailored to the particular application, or use of the module setting gauge. Since such a reworking of the cathode can be done after a replacement of the entire module, such work does not cause significant interruptions of production, e.g. in a production line.
  • the features of claim 6 may be provided, wherein the insert is suitably soldered into the mouth of the anode.
  • the features of claim 7 allow the anode to be easily exchanged, e.g. if this is worn out accordingly, or if for a particular use of the device, or specific work a different geometry of the anode is appropriate.
  • the contact pins for the production of the electrical connection can be used simultaneously for the supply of the coolant.
  • one of an electrically insulating material e.g. Ceramics produced substantially hollow cylindrical holder 1 is provided, in one end region of which also made of an insulating material insert 2 is pressed.
  • This insert 2 is penetrated by a central, a gas supply line 3 forming tube which terminates at the end face of the projecting beyond the front side of the holder 1 insert 2. Furthermore, the insert 2 still has two bores 4 located in a diametral plane, in which press-fit parts 7 serving as abutments are held, which in turn are interspersed with clearance by the cores 5 of connection lines 6.
  • connecting lines 6 are connected to a voltage supply, not shown, which is suitable to deliver in addition to the required for the work to be performed operating power also required for the ignition of the plasma ignition pulses.
  • the contact pins 9 which are soldered to the souls 5, push outward.
  • the contact pins 9 are provided at their free end with a frontal projection 10 which cooperates with a contact surface of a plasma generator 11 which is held in a arranged on the end face of the holder 1 fastening means 23, which is manufactured as a made of an electrically insulating material bracket is formed, in which the plasma generator 11 is inserted from above.
  • This plasma generator 11 has a connecting part 13 made of an electrically insulating material, e.g. Ceramic, which is conically tapered in its lower portion and has an opening 14 at its lower end face.
  • a connecting part 13 made of an electrically insulating material, e.g. Ceramic, which is conically tapered in its lower portion and has an opening 14 at its lower end face.
  • This opening 14 is penetrated by an annular anode 15, which is made in the usual way of an electrically conductive and thermally highly resilient material and has a nozzle opening 16 in its mouth region.
  • the anode 15 has an upwardly conically widening region, which rests on the inside of the connecting part 13 and which merges into a cylindrical region.
  • an intermediate part 17 which is annular and made of an electrically insulating material, e.g. Ceramic, is made.
  • the intermediate part 17 At the upper end side of the intermediate part 17 is made of a highly electrically conductive material, such as copper, produced holding part 18, in which a cathode 19 is pressed, consisting of an electrically conductive and thermally highly resilient material, such as a tungsten ceria -Alloy is made and in its nozzle opening 16 of the anode 15 near end region is conical.
  • a highly electrically conductive material such as copper
  • the anode 15, as well as the holding member 18 are adapted to define the mutual position of the cathode 10 and the nozzle opening 16 of the anode expediently in the connecting part 13.
  • the anode 15, the intermediate part 17 and the holding part 18 with the pressed-in cathode 19 together with the connecting part 13 form a module of the device, which can be easily installed in the holder and removed therefrom.
  • an insulating material pressure member 20 which has a cathode 19 with clearance receiving bore 21 and projects beyond the end face of the connecting part 13.
  • This pressure member 20 cooperates with a cover 22 which is screwed onto an in the upper end face of the connecting part 13 near the area arranged external thread 23.
  • the connecting part 13 is provided with three along a surface line arranged radial bores 24, 25, of which the holes 24 allow the passage of the lugs 10 of the contact pins 9 and in the region of the holding part 18, and the anode 15 are.
  • the bore 25 is disposed in the region of the intermediate part 17 and aligned with a radially extending inlet 26 of the intermediate part which leads to a limited by the inner wall of the intermediate part 17 chamber 27, which is penetrated by the cathode 19.
  • the bore 25 is aligned with the plasma generator used in the holder 1, which is constructed as a module, also with the gas supply line 3 provided in the holder 1.
  • connection lines 6 To install the plasma generator 11 constructed as a module, it suffices the connection lines 6, the insulating coats 28 are performed with play in the holes 4 of the insert 2 of the holder 1, withdraw and insert the plasma generator 11 from above into the bracket 12. Thereafter, the leads 6 can be released and the pins 9 engage in the holes 24 of the connecting part 13 and secure the position of the plasma generator 11 in the holder 1. At the same time they are with their faces by means of the springs 8 to the holding part 8, or the anode 15 is pressed and thus made a good electrical contact.
  • a plasma is formed, which emerges from the nozzle opening 16 and is e.g. can be used to make a weld or to cut materials.
  • a holder 1 ' is provided, the holes 4' for receiving the contact pins 9 ', wherein the contact pins 9' are pierced in the axial direction.
  • the contact pins 9 ' are provided in an area outside the holder 1' with an external thread 29, are screwed onto the terminal nuts 30, between which terminal lugs 31 of leads 8 (Fig. 4) are clamped.
  • the rear end of the contact pins 9 ' is designed for the connection of hoses through which cooling water can be supplied.
  • a gas supply line 3 ' is held in the holder 1', which, as can be seen from Fig. 4, via a radial channel 32 which is closed with a grub screw 33 to the outside, and an opening into this axial bore 34, in which a hose nozzle 35 is screwed in, is connected to a gas hose 36, via which a gas required for generating the plasma can be supplied.
  • the gas supply line 3 ' is secured by means of a screw 39 engaging in this position.
  • the contact pins 9 ' project beyond the end face 38 of the holder 1' in their spring-loaded rest position and engage in the lateral surface of a plasma generator 11 'constructed as a module.
  • the constructed as a module plasma generator 11 ' is held by means of a pipe clamp 40, which is held on the end face 38 of the holder 1' fixed part with pins 42.
  • the clamp 40 has a hinge 43, whose axis is perpendicular to the axis of the holder 1 '.
  • the holding part 18' of the cathode 19 ' is formed by a collet, which is made of a material with good electrical conductivity. This collet is held in a conventional manner in a receptacle 44 which is screwed into a contact part 45.
  • This contact part 45 is provided with a coolant chamber 46, which is connected via a radial channel 47 with a connection opening 48.
  • this connection opening 48 is aligned in the holder 1 'mounted plasma generator 11' with the contact pins 9 '.
  • a clamping nut 49 is provided, which is supported by two seals 50 on the upper end face of the receptacle 44, whereby a leakage of coolant is avoided, the receptacle 44 for sealing the coolant chamber 46 also via a seal 51 is supported on the contact part 45.
  • an O-ring 52 is provided, which is inserted in a groove of a bore 53 which is penetrated by the receptacle 44.
  • the clamping nut 49 is provided with a continuous threaded hole 90, is screwed into a stop 91 which engages in the collet 18 '.
  • This Stop 91 has a smooth head 94 in which a circumferential groove for receiving an O-ring 95 is incorporated, which serves to seal the interior of the collet 18 '.
  • a Kontramutter 92 is provided, the same time for a rotationally fixed connection between the stop 91, against which the cathode 19 ', and the clamping nut 49th provides.
  • the contact part 45 which serves to contact the cathode 19 ', lies with the interposition of a seal 54 on an intermediate part 55, which consists of an electrically insulating material, such as. Ceramic, is made.
  • This intermediate part 55 determines the chamber 27 'which is connected via a radial passage 56 with a connection opening 57.
  • the radial channels 47 and 56 are provided with circumferential grooves 58, in which O-rings 59 are arranged. These serve to seal the contact pins 9 'or the gas supply line 3' engaging in these channels.
  • a distribution ring 59' is arranged, which is provided with distributed over the circumference arranged holes 60 whose diameter increases in both directions with increasing angle to the radial channel 56.
  • the axial bore of the distribution ring 59 'of the cathode 19' passes.
  • an annular space 61 remains between the inner wall of the intermediate part 55 and the distribution ring 59 '.
  • the intermediate part 55 is supported via a seal 62 on an anode contact part 63.
  • a clamping sleeve 64 is screwed into an internal thread 65, wherein a seal 66 between the anode contact part 63 and the end face of the clamping sleeve 64 is interposed.
  • the clamping sleeve 64 has in the region of its one end a conical contact surface 67, against which a diametrically opposite conical surface 68 of a head 69 of an anode 15 'is applied, which, like the clamping sleeve 64 and the anode contact portion 63 made of a highly electrically conductive material is.
  • the anode 15 rests with its end facing away from the head 69 with a further head 70, which rests with the interposition of a seal 71 on a shoulder of the anode contact part 63. In this case, the anode 15 'passes through a coolant chamber 46 of the anode contact part 63.
  • the anode 15 ' is pierced in the axial direction, in which bore 72 a sleeve 73 is inserted, which is made of an electrically insulating material, e.g. Ceramic, is made, and is penetrated by the cathode 19 '.
  • an electrically insulating material e.g. Ceramic
  • a centering sleeve 74 is used, which is shown in more detail in FIG. 7 and whose provided on guide ribs 89 guide surfaces 75 abut the lateral surface of the cathode 19'.
  • the anode 15 ' has radially projecting guide ribs 76, which, as can be seen from FIG. 6, extend from the hexagonal-section anode 15' to the inner wall of the clamping sleeve 64 and perpendicular to the axis of the radial channel 47.
  • the guide ribs 76 extend away from the head 70 against the head 69 of the anode 15 ', but between the head 69 and the guide ribs 76, a flow path 77 remains.
  • the coolant chamber 46 which is bounded on the one hand by the anode contact part 63 and the clamping sleeve 64, divided by the guide ribs 76.
  • the two coolant chambers 46 of the contact part 45 and the anode contact part 63 are connected to one another via an overflow channel 78.
  • This overflow channel 78 consists essentially of axial bores 79 in the contact part 45, and the anode contact part 63 and radial, coaxial with the radial channels 47 holes 80, which open into the axial bores 79.
  • the intermediate part 55 is provided with a bore 81 aligned with the axial bores 81.
  • seals 82 are provided in the region of the bore 81 of the intermediate part.
  • an insert 83 made of a wear-resistant material, e.g. made of a tungsten-ceria alloy.
  • the two contact parts 45 and 63 are surrounded by rings 84 of an electrically insulated material, or these sit on collars 85.
  • gas for example helium, CO 2 or the like
  • gas for example helium, CO 2 or the like
  • the cathode 19 ' is tapered at both ends.
  • the two contact parts 45 and 63 and the intermediate part 55 are connected to one another by means of the screws 87 shown in FIG. 4 and constitute the connecting parts, by means of which a modular construction of the plasma generator 11 'is ensured.
  • the plasma generator 11' designed as a module can be removed by loosening the clamping screw 88 and opening the pipe clamp 40, after which the clamping nut 49 can be released and the cathode 19 'removed from the collet. Then the cathode can be turned or its tapered ends can be reground. Subsequently, the cathode can be adjusted with respect to the anode 15 'by means of a gauge. Subsequently, the stop 91 is set with the collet 18 'open and then the cathode 19' by means of the clamping nut 49 in the collet 18 ' fixed again, after which the module 11 'can be reinstalled.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Geometry (AREA)
  • Plasma Technology (AREA)
  • Electron Sources, Ion Sources (AREA)
EP99890002A 1998-01-28 1999-01-08 Gerät mit einem Plasmaerzeuger Expired - Lifetime EP0933982B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0013598A AT406243B (de) 1998-01-28 1998-01-28 Gerät mit einem plasmaerzeuger
AT13598 1998-01-28

Publications (3)

Publication Number Publication Date
EP0933982A2 EP0933982A2 (de) 1999-08-04
EP0933982A3 EP0933982A3 (de) 2002-05-08
EP0933982B1 true EP0933982B1 (de) 2006-10-25

Family

ID=3482461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99890002A Expired - Lifetime EP0933982B1 (de) 1998-01-28 1999-01-08 Gerät mit einem Plasmaerzeuger

Country Status (7)

Country Link
US (1) US6080955A (es)
EP (1) EP0933982B1 (es)
AT (1) AT406243B (es)
CA (1) CA2260505C (es)
CZ (1) CZ296337B6 (es)
DE (1) DE59913939D1 (es)
ES (1) ES2273471T3 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6320156B1 (en) * 1999-05-10 2001-11-20 Komatsu Ltd. Plasma processing device, plasma torch and method for replacing components of same
US6424082B1 (en) 2000-08-03 2002-07-23 Hypertherm, Inc. Apparatus and method of improved consumable alignment in material processing apparatus
US6958513B2 (en) * 2003-06-06 2005-10-25 Chih-Hsin Wang Floating-gate memory cell having trench structure with ballistic-charge injector, and the array of memory cells
JP2007514283A (ja) * 2003-12-09 2007-05-31 アーエムテー アーゲー プラズマスプレー装置
US20070045241A1 (en) * 2005-08-29 2007-03-01 Schneider Joseph C Contact start plasma torch and method of operation
US9480138B2 (en) 2007-08-06 2016-10-25 Hypertherm, Inc. Articulating thermal processing torches and related systems and methods
CN113475165A (zh) * 2018-11-30 2021-10-01 欧瑞康美科（美国）公司 用于等离子体枪的电极

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8132660U1 (de) * 1981-11-07 1983-04-28 Haferkamp, Heinz, Prof. Dr.-Ing., 3340 Wolfenbüttel Plasma-Schneidbrenner
DE3400281A1 (de) * 1984-01-05 1985-07-18 Wilhelm Merkle Schweißmaschinenbau GmbH, 8871 Kötz Plasmaschneidbrenner
FR2562748B1 (fr) * 1984-04-04 1989-06-02 Soudure Autogene Francaise Torche de soudage ou coupage a plasma
US4582979A (en) * 1984-09-10 1986-04-15 Moerke Delford A Arc welding system and docking assembly therefor
US4692584A (en) * 1985-11-29 1987-09-08 Caneer Jr Clifford Gas control system for a plasma arc welding apparatus
US4939339A (en) * 1989-04-03 1990-07-03 Fmc Corporation Apparatus for quick disconnect of an arc welder torch
US5074802A (en) * 1989-09-12 1991-12-24 Hypertherm, Inc. Pneumatic-electric quick disconnect connector for a plasma arc torch
US5258599A (en) * 1991-08-05 1993-11-02 Moerke Delford A Convertible arc welding system
US5214262A (en) * 1992-04-03 1993-05-25 Esab Welding Products, Inc. Electrode adaptor
DE4228064A1 (de) * 1992-08-24 1994-03-03 Plasma Technik Ag Plasmaspritzgerät
FR2698301B1 (fr) * 1992-11-20 1994-12-23 Soudure Autogene Francaise Torche de coupage plasma.
US5451739A (en) * 1994-08-19 1995-09-19 Esab Group, Inc. Electrode for plasma arc torch having channels to extend service life
US5624586A (en) * 1995-01-04 1997-04-29 Hypertherm, Inc. Alignment device and method for a plasma arc torch system
CA2210136A1 (en) * 1995-01-31 1996-08-08 Komatsu Ltd. Processing torch
US5681489A (en) * 1995-12-13 1997-10-28 The Esab Group, Inc. Plasma arc torch including means for disabling power source

Also Published As

Publication number Publication date
CA2260505C (en) 2007-12-04
ATA13598A (de) 1999-08-15
CZ9900008A3 (en) 2001-06-13
AT406243B (de) 2000-03-27
ES2273471T3 (es) 2007-05-01
CA2260505A1 (en) 1999-07-28
DE59913939D1 (de) 2006-12-07
CZ296337B6 (cs) 2006-02-15
EP0933982A3 (de) 2002-05-08
EP0933982A2 (de) 1999-08-04
US6080955A (en) 2000-06-27

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