US3851824A - Nozzle for plasma welding torch - Google Patents

Nozzle for plasma welding torch Download PDF

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Publication number
US3851824A
US3851824A US00343222A US34322273A US3851824A US 3851824 A US3851824 A US 3851824A US 00343222 A US00343222 A US 00343222A US 34322273 A US34322273 A US 34322273A US 3851824 A US3851824 A US 3851824A
Authority
US
United States
Prior art keywords
nozzle
holder
assembly
accordance
conical
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
US00343222A
Other languages
English (en)
Inventor
O Svensson
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.)
ESAB AB
Original Assignee
AGA AB
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
Priority to NLAANVRAGE7301528,A priority Critical patent/NL182526C/xx
Priority to AT92973A priority patent/AT339694B/de
Priority to FR7304433A priority patent/FR2217901B1/fr
Priority to DE2307018A priority patent/DE2307018C2/de
Application filed by AGA AB filed Critical AGA AB
Priority to US00343222A priority patent/US3851824A/en
Application granted granted Critical
Publication of US3851824A publication Critical patent/US3851824A/en
Assigned to ESAB AB, BOX 8004, S-402 77 GOTHENBURG, SWEDEN, A CORP. OF SWEDEN reassignment ESAB AB, BOX 8004, S-402 77 GOTHENBURG, SWEDEN, A CORP. OF SWEDEN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AGA AKTIEBOLAG
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/22—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc
    • B05B7/222—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc
    • B05B7/226—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc the material being originally a particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00—Welding or cutting by means of a plasma
    • 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
    • H05H1/38—Guiding or centering of electrodes
    • 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 nozzle is fash- 239/600; I 6 ioned with a conical contact surface which is adapted to rest against a corresponding contact surface in the References Clted nozzle holder and is designed, together with the UNITED STATES PATENTS threads of the nozzle and holder, so that a desired 2,861,900 11/1958 Smith et al 239/1323 x Contact Pressure between the Conical surfaces of the 3,411,716 11/1968 Stephan et al.
  • the present invention relates to a nozzle assembly for use in a plasma torch intended for plasma welding, plasma cutting, plasma surfacing or plasma spraying, which assembly comprises a threaded nozzle and a threaded nozzle holder which includes cooling ducts and is adapted to engage and retain said nozzle.
  • Conventional plasma torches include a nozzle fitted in a nozzle holder. Both the nozzle and nozzle holder include cooling ducts, connected to each other, and to a source of coolant such as water, so that direct cooling of the nozzle can be achieved. Furthermore, in order to avoid leakage, seals must be fitted between the nozzle and nozzle holder. The result is that a nozzle and holder of complicated design which include cooperating cooling ducts are required which are expensive to manufacture.
  • anozzle assembly for a plasma torch which is of uncomplicated design, does not require cooling ducts in the nozzle itself, and is adapted for easy nozzle replacement. Accordingly, the nozzle assembly of the invention overcomes the disadvantages associated with prior art nozzle assemblies.
  • the nozzle assembly of the present invention comprises a threaded nozzle holder, which is preferably internally threaded and includes a conical contact surface, means for cooling the assembly, disposed within said nozzle holder; and a threaded nozzle, which is preferably externally threaded, and includes a conical contact surface which is adapted to rest against said conical contact surface of said holder when said nozzle is threadably engaged in and pressed against said holder.
  • the angle of slope of the conical contact surface of said nozzle or holder against the longitudinal axis of the plasma torch, and the diameter and the length of the threaded portions of said nozzle or holder are chosen so that the quotient of the radial and the axial movement of a surface element on said conical surface during heating up of said nozzle is always greater than the tangent of the angle of slope of said conical surface.
  • FIG. 1 is a cross-sectional view of a lower portion of i DETAILED DESCRIPTION OF THE INVENTION
  • a preferred embodiment of the nozzle assembly of the invention is shown and is identified generally by the numeral 10.
  • the assembly which comprises the lower portion of plasma torch 11, includes a nozzle holder 12. having internal threads 14 and conical contact surface 15, and provided with cooling ducts 16, which communicate with a source of coolant such as a water supply source, not shown for drawing clarity.
  • a nozzle indicated generally by the numeral 20 includes external threads 22, nozzle opening 24, and conical contact surface 26.
  • the nozzle 20 is adapted to be threadably engaged or screwed into nozzle holder 12 so that the conical surface 26 thereof rests against conical surface 15 of the holder 12.
  • the heat generated in the nozzle 20 will be transferred via these contact surfaces 25, 15 to the holder 12, which, as mentioned previously, is water-cooled, whence the heat is carried off.
  • the angle of slope of the conical surface 26 or 15, and the diameter and length of the thread 22 are chosen so, that the quotient of the radial and the axial movement of a surface element on the conical surface is always greater than the tangent of the angle of slope [3 (shown in FIG. 2).
  • the following condition may be drawn up.
  • the diameter of the threaded part is put equal to D, the length of the thread equal to l, the distance from the start of the thread to the point A on the thread where axial movement in relation to the nozzle holder does not occur is equal to a" and the coeffecient of linear expansion is equal to a, as shown in FIG. 2. If it is assumed that the nozzle is uniformly heated and the temperature of the nozzle holder is not altered, the following applies for a surface element in the point P situated at a distance x from the start of the thread:
  • nozzle assembly is not limited to the values which have been given above, but variations are certainly possible within the scope of the conditions specified in accordance with the invention. Furthermore, the nozzle assembly of the invention can be employed in conjunction with any conventional plasma torch as will be apparent to those skilled in the art.
  • a nozzle assembly for use with a plasma torch comprising a threaded nozzle holder; a conical contact surface on said holder; means for cooling the assembly, disposed within said holder; a threaded nozzle and a conical contact surface thereon, adapted to rest against said conical contact surface on said holder, when said nozzle is threadably engaged in and thereby pressed against said holder, the angle of slope of the conical surface of said nozzle or holder against the longitudinal axis of the torch in which said assembly is disposed and the diameter (D) and length (l) of the threaded portion being chosen so, that the quotient of the radial and the axial movement of a surface element on said conical surface during heating up is always greater than the tangent of the angle of slope (B) of said conical surface.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Geometry (AREA)
  • Arc Welding In General (AREA)
  • Plasma Technology (AREA)
US00343222A 1973-03-21 1973-03-21 Nozzle for plasma welding torch Expired - Lifetime US3851824A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NLAANVRAGE7301528,A NL182526C (nl) 1973-03-21 1973-02-02 Plasmatoorts.
AT92973A AT339694B (de) 1973-03-21 1973-02-02 Plasmabrenner
FR7304433A FR2217901B1 (enExample) 1973-03-21 1973-02-08
DE2307018A DE2307018C2 (de) 1973-03-21 1973-02-13 Plasmabrenner
US00343222A US3851824A (en) 1973-03-21 1973-03-21 Nozzle for plasma welding torch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00343222A US3851824A (en) 1973-03-21 1973-03-21 Nozzle for plasma welding torch

Publications (1)

Publication Number Publication Date
US3851824A true US3851824A (en) 1974-12-03

Family

ID=23345200

Family Applications (1)

Application Number Title Priority Date Filing Date
US00343222A Expired - Lifetime US3851824A (en) 1973-03-21 1973-03-21 Nozzle for plasma welding torch

Country Status (5)

Country Link
US (1) US3851824A (enExample)
AT (1) AT339694B (enExample)
DE (1) DE2307018C2 (enExample)
FR (1) FR2217901B1 (enExample)
NL (1) NL182526C (enExample)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610776A1 (fr) * 1987-01-22 1988-08-12 Inst Elektroswarki Patona Tuyere pour chalumeau a plasma
EP0522270A1 (de) * 1991-07-10 1993-01-13 ERNO Raumfahrttechnik Gesellschaft mit beschränkter Haftung Triebwerk für Raumflugkörper
FR2753041A1 (fr) * 1996-08-28 1998-03-06 Doryokuro Kakunenryo Torche a jet de plasma a refroidissement indirect
WO1998020189A3 (en) * 1996-11-01 1998-10-29 Du Pont Nose cone for small spin head in flash spinning system
WO2001098013A1 (en) * 2000-06-21 2001-12-27 Richard Paul Fryer High temperature tooling
WO2004026520A3 (de) * 2002-09-18 2004-08-26 Fronius Int Gmbh Brennerkopf für schweissbrenner sowie gasdüse, kontaktdüse und isolierdüse für einen solchen brennerkopf
WO2009124524A1 (de) * 2008-04-08 2009-10-15 Kjellbberg Finsterwalde Plasma Und Maschinen Gmbh Düse für einen flüssigkeitsgekühlten plasmabrenner, anordnung aus derselben und einer düsenkappe sowie flüssigkeitsgekühlter plasmabrenner mit einer derartigen anordnung
US20100264120A1 (en) * 2006-08-16 2010-10-21 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh Plasma Torch Head, Plasma Torch Shaft and Plasma Torch
CN104136130A (zh) * 2012-01-27 2014-11-05 苏舍美特科（美国）公司 带可移除的喷嘴尖的热喷枪以及制造和使用其的方法
EP3648923A1 (en) * 2017-07-04 2020-05-13 Norsk Titanium AS Plasma torch system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112288A (en) * 1975-04-17 1978-09-05 General Atomic Company Orifice tip
US8513565B2 (en) 2008-04-10 2013-08-20 Hypertherm, Inc. Nozzle head with increased shoulder thickness

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861900A (en) * 1955-05-02 1958-11-25 Union Carbide Corp Jet plating of high melting point materials
US3411716A (en) * 1966-05-11 1968-11-19 United States Steel Corp Oxygen lance for steelmaking furnaces

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861900A (en) * 1955-05-02 1958-11-25 Union Carbide Corp Jet plating of high melting point materials
US3411716A (en) * 1966-05-11 1968-11-19 United States Steel Corp Oxygen lance for steelmaking furnaces

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610776A1 (fr) * 1987-01-22 1988-08-12 Inst Elektroswarki Patona Tuyere pour chalumeau a plasma
EP0522270A1 (de) * 1991-07-10 1993-01-13 ERNO Raumfahrttechnik Gesellschaft mit beschränkter Haftung Triebwerk für Raumflugkörper
FR2753041A1 (fr) * 1996-08-28 1998-03-06 Doryokuro Kakunenryo Torche a jet de plasma a refroidissement indirect
WO1998020189A3 (en) * 1996-11-01 1998-10-29 Du Pont Nose cone for small spin head in flash spinning system
US5971731A (en) * 1996-11-01 1999-10-26 E. I. Du Pont De Nemours And Company Nose cone for small spin head in flash spinning system
WO2001098013A1 (en) * 2000-06-21 2001-12-27 Richard Paul Fryer High temperature tooling
US20030173339A1 (en) * 2000-06-21 2003-09-18 Fryer Paul Chalfont High temperature tooling
WO2004026520A3 (de) * 2002-09-18 2004-08-26 Fronius Int Gmbh Brennerkopf für schweissbrenner sowie gasdüse, kontaktdüse und isolierdüse für einen solchen brennerkopf
US9101041B2 (en) 2006-08-16 2015-08-04 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh Plasma torch head, plasma torch shaft and plasma torch
US20100264120A1 (en) * 2006-08-16 2010-10-21 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh Plasma Torch Head, Plasma Torch Shaft and Plasma Torch
WO2009124524A1 (de) * 2008-04-08 2009-10-15 Kjellbberg Finsterwalde Plasma Und Maschinen Gmbh Düse für einen flüssigkeitsgekühlten plasmabrenner, anordnung aus derselben und einer düsenkappe sowie flüssigkeitsgekühlter plasmabrenner mit einer derartigen anordnung
US8575510B2 (en) 2008-04-08 2013-11-05 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh Nozzle for a liquid-cooled plasma burner, arrangement thereof with a nozzle cap, and liquid-cooled plasma burner comprising such an arrangement
US20110108528A1 (en) * 2008-04-08 2011-05-12 Frank Laurisch Nozzle for a Liquid-Cooled Plasma Burner, Arrangement Thereof with a Nozzle Cap, and Liquid-Cooled Plasma Burner Comprising Such an Arrangement
CN104136130A (zh) * 2012-01-27 2014-11-05 苏舍美特科（美国）公司 带可移除的喷嘴尖的热喷枪以及制造和使用其的方法
EP2806977A4 (en) * 2012-01-27 2016-02-10 Sulzer Metco Us Inc THERMOSPRINT PISTOL WITH REMOVABLE NOZZLE TIP AND METHOD FOR THE PRODUCTION AND USE THEREOF
CN104136130B (zh) * 2012-01-27 2018-12-28 欧瑞康美科（美国）公司 带可移除的喷嘴尖的热喷枪以及制造和使用其的方法
US11014112B2 (en) 2012-01-27 2021-05-25 Oerlikon Metco (Us) Inc. Thermo spray gun with removable nozzle tip and method making and using the same
EP3648923A1 (en) * 2017-07-04 2020-05-13 Norsk Titanium AS Plasma torch system

Also Published As

Publication number Publication date
DE2307018B1 (de) 1973-10-04
DE2307018C2 (de) 1974-04-25
NL182526C (nl) 1988-03-16
NL7301528A (enExample) 1974-08-06
NL182526B (nl) 1987-10-16
ATA92973A (de) 1977-02-15
FR2217901B1 (enExample) 1979-03-02
AT339694B (de) 1977-11-10
FR2217901A1 (enExample) 1974-09-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ESAB AB, BOX 8004, S-402 77 GOTHENBURG, SWEDEN, A

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AGA AKTIEBOLAG;REEL/FRAME:004716/0220

Effective date: 19870324