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DK1940578T3 - Fremgangsmåde til kortbuesvejsning - Google Patents

Fremgangsmåde til kortbuesvejsning Download PDF

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Publication number
DK1940578T3
DK1940578T3 DK06794077.5T DK06794077T DK1940578T3 DK 1940578 T3 DK1940578 T3 DK 1940578T3 DK 06794077 T DK06794077 T DK 06794077T DK 1940578 T3 DK1940578 T3 DK 1940578T3
Authority
DK
Denmark
Prior art keywords
short
arc
current
welding
circuit
Prior art date
Application number
DK06794077.5T
Other languages
English (en)
Inventor
Pauli Hämäläinen
Esa Eloniemi
Olli Järvinen
Original Assignee
Kemppi Oy
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35151355&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DK1940578(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kemppi Oy filed Critical Kemppi Oy
Application granted granted Critical
Publication of DK1940578T3 publication Critical patent/DK1940578T3/da

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Classifications

    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/095—Monitoring or automatic control of welding parameters
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
    • B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
    • B23K9/092—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits characterised by the shape of the pulses produced

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)
  • Arc Welding In General (AREA)

Claims (7)

1. Fremgangsmåde til kortbuesvejsning, i hvilken fremgangsmåde - der dannes en elektrisk periodisk vekslende bue, som kortsluttes periodisk af en smeltet dråbe (22) fra svejsetråden (20), mellem svejsetråden (20) og basismaterialet (21), hvor - hver svejsecyklus dannes af en kortslutningsfase (14) og en buefase (15), hvor både kortslutnings- (14) og buefasen (15) indbefatter både en højspændingspuls (5, 10) og lavspændingsperioder (2, 7, 12, 16), - parametre (2, 3, 4, 5, 6) af slutdelen af kortslutningsfasen defineres før starten på kortslutningsfasen (14) på grundlag af materialet, beskyttelsesgassen og trådfremføringshastigheden, kendetegnet ved, at - der på grundlag af parametrene i slutdelen af hver kortslutningsfase (14) dannes en faldende strømform (6, 7), hvor pinchingen af dråben (22) i denne periode forventes, uden at det forsøges at detektere pinching af dråben (22).
2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at den første del af kortslutningsreaktionen er en højspændingspuls, som tilvejebringer en betydelig del af den energi, som er nødvendig for at fjerne tilsatsmetaldråben (22).
3. Fremgangsmåde ifølge krav 1, kendetegnet ved, at depinchingen af tilsatsmetaldråben (22) finder sted på et strømniveau, som er tilstrækkeligt lavt til at opnå ikke-sprøjtning.
4. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at varigheden af kortslutningsfasen (14) måles, og måledataene anvendes til at justere parametrene (1,2, 3, 4, 5, 6, 8, 9, 10, 11, 12) af den følgende bue- og kortslutningsfase.
5. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at varigheden af kortslutningsfasen (14) måles, og måledataene anvendes til at justere parametrene (1,2, 3, 4, 5, 6, 8, 9, 10, 11, 12) af den følgende bue- og kortslutningsfase.
6. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at svejsepølen ved starten på buefasen (15) dannes (8, 9, 10) ved anvendelse af en pulslignende strøm.
7. Fremgangsmåde ifølge et af de foregående krav, kendetegnet ved, at buen ved starten på buefasen (15) dannes ved anvendelse af en multi-parametrisk (8, 9, 10) pulslignende strøm.
DK06794077.5T 2005-09-08 2006-09-08 Fremgangsmåde til kortbuesvejsning DK1940578T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20050896A FI119923B (fi) 2005-09-08 2005-09-08 Menetelmä ja laitteisto lyhytkaarihitsausta varten
PCT/FI2006/000300 WO2007028858A1 (en) 2005-09-08 2006-09-08 Method and apparatus for short- arc welding

Publications (1)

Publication Number Publication Date
DK1940578T3 true DK1940578T3 (da) 2017-08-28

Family

ID=35151355

Family Applications (1)

Application Number Title Priority Date Filing Date
DK06794077.5T DK1940578T3 (da) 2005-09-08 2006-09-08 Fremgangsmåde til kortbuesvejsning

Country Status (9)

Country Link
US (1) US20090166344A1 (da)
EP (1) EP1940578B1 (da)
CN (1) CN101262976B (da)
AU (1) AU2006289052B2 (da)
BR (1) BRPI0615564A2 (da)
DK (1) DK1940578T3 (da)
FI (1) FI119923B (da)
RU (1) RU2422255C2 (da)
WO (1) WO2007028858A1 (da)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8373093B2 (en) 2008-06-27 2013-02-12 Lincoln Global, Inc. Method and system to increase heat input to a weld during a short-circuit arc welding process
US9415458B2 (en) 2007-09-26 2016-08-16 Lincoln Global, Inc. Method to improve the characteristics of a root pass pipe weld
US8937267B2 (en) 2007-09-26 2015-01-20 Lincoln Global, Inc. Method and system to increase heat input to a weld during a short-circuit arc welding process
US9895760B2 (en) 2007-09-26 2018-02-20 Lincoln Global, Inc. Method and system to increase heat input to a weld during a short-circuit arc welding process
CN102149502A (zh) * 2008-09-30 2011-08-10 大阳日酸株式会社 钢板的气体保护电弧钎焊方法
US10058947B2 (en) * 2009-11-25 2018-08-28 Panasonic Intellectual Property Management Co., Ltd. Welding method and welding device
JP5626866B2 (ja) * 2010-08-20 2014-11-19 株式会社ダイヘン アーク溶接方法およびアーク溶接システム
JP6395644B2 (ja) * 2015-02-27 2018-09-26 株式会社神戸製鋼所 アーク溶接方法、アーク溶接装置およびアーク溶接用制御装置
RU2613247C2 (ru) * 2015-07-13 2017-03-15 Сергей Валентинович Федюкин Способ механизированной дуговой сварки с короткими замыканиями в среде инертных и защитных газов
US10179369B2 (en) 2015-10-27 2019-01-15 Lincoln Global, Inc. Welding system for AC welding with reduced spatter
JP7328546B2 (ja) * 2020-01-30 2023-08-17 日本製鉄株式会社 溶接部材の製造方法
US20230347439A1 (en) * 2020-08-13 2023-11-02 Fronius International Gmbh Method and welding device for contactlessly striking an arc
CN112453657A (zh) * 2020-11-10 2021-03-09 天津理工大学 一种用于2205双相不锈钢mig焊的三元保护气体及其焊接工艺
WO2023095623A1 (ja) * 2021-11-29 2023-06-01 パナソニックＩｐマネジメント株式会社 アーク溶接方法及びアーク溶接装置
CN115846823A (zh) * 2022-11-30 2023-03-28 唐山松下产业机器有限公司 焊接用短路电弧的控制方法

Family Cites Families (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727125A (en) * 1952-07-01 1955-12-13 Air Reduction Electric arc welding
US2851581A (en) * 1954-04-06 1958-09-09 Gen Electric Arc welding method and apparatus
US2947847A (en) * 1955-01-14 1960-08-02 Union Carbide Corp Shielded metal arc welding process
US3023301A (en) * 1956-03-05 1962-02-27 Union Carbide Corp Silica-free welding flux
US3016447A (en) * 1956-12-31 1962-01-09 Union Carbide Corp Collimated electric arc-powder deposition process
US2934632A (en) * 1957-05-20 1960-04-26 Western Carbide Corp Method of and apparatus for feeding magnetic welding powder to welding wire
GB1109901A (en) 1964-07-14 1968-04-18 Lincoln Electric Company Ltd Improvements in electric arc welding apparatus
US3995073A (en) * 1974-04-08 1976-11-30 Trw Inc. Method for thermal deposition of metal
CA1049625A (en) * 1975-04-30 1979-02-27 Wolfgang Zwintzscher Method and apparatus for building up workpieces by welding
US4097711A (en) * 1976-09-16 1978-06-27 Ingersoll-Rand Company Roller shell hard coating
US4131072A (en) * 1977-05-26 1978-12-26 Lingl Corporation Apparatus for individual controlled distribution of powdered solid fuel to plural burning units
US4221957A (en) * 1979-03-01 1980-09-09 Combustion Engineering, Inc. Welding flux closed loop system
GB2052566B (en) * 1979-03-30 1982-12-15 Rolls Royce Laser aplication of hard surface alloy
US4259911A (en) * 1979-06-21 1981-04-07 Combustion Engineering, Inc. Fluidized bed boiler feed system
US4302483A (en) * 1979-09-04 1981-11-24 Texasgulf Inc. Metallizing of a corrodible metal with a protective metal
US4269867A (en) * 1979-09-04 1981-05-26 Texasgulf Inc. Metallizing of a corrodible metal with a protective metal
US4414459A (en) * 1981-11-02 1983-11-08 Chicago Bridge & Iron Company Method and apparatus for overhead welding
US4570047A (en) * 1982-10-28 1986-02-11 John Vislosky Submerged automatic arc welder
JPS6064774A (ja) 1983-04-30 1985-04-13 Kobe Steel Ltd 短絡移行を伴なう溶接の電流制御方法
JPS59202175A (ja) 1983-04-30 1984-11-15 Kobe Steel Ltd 短絡を伴なう溶接の電流制御方法
US4546234A (en) * 1983-08-11 1985-10-08 Kabushiki Kaisha Kobe Seiko Sho Output control of short circuit welding power source
US4627990A (en) * 1984-03-07 1986-12-09 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for supplying powdery material
JPS6168311A (ja) * 1984-09-10 1986-04-08 Chugai Ro Kogyo Kaisha Ltd 窒化アルミニウム粉未の製造方法およびその装置
US4743733A (en) * 1984-10-01 1988-05-10 General Electric Company Method and apparatus for repairing metal in an article
US4730093A (en) * 1984-10-01 1988-03-08 General Electric Company Method and apparatus for repairing metal in an article
US4613741A (en) * 1984-10-03 1986-09-23 Arnoldy Roman F Feeder for welds
JPH0613145B2 (ja) 1985-05-02 1994-02-23 松下電器産業株式会社 ア−ク溶接用電源
JPH0632857B2 (ja) 1985-05-02 1994-05-02 松下電器産業株式会社 ア−ク溶接用電源
SU1278151A2 (ru) * 1985-05-15 1986-12-23 Челябинский Политехнический Институт Им.Ленинского Комсомола Способ электродуговой сварки плав щимс электродом с короткими замыкани ми дугового промежутка
US4723060A (en) * 1985-07-05 1988-02-02 Arnoldy Roman F Feeder equalizer and homogenizer
SU1299730A2 (ru) * 1985-07-23 1987-03-30 Челябинский Политехнический Институт Им.Ленинского Комсомола Способ электродуговой сварки плав щимс электродом с короткими замыкани ми дугового промежутка
US4746540A (en) * 1985-08-13 1988-05-24 Toyota Jidosha Kabushiki Kaisha Method for forming alloy layer upon aluminum alloy substrate by irradiating with a CO2 laser, on substrate surface, alloy powder containing substance for alloying and silicon or bismuth
JPS6254588A (ja) * 1985-08-30 1987-03-10 Toyota Motor Corp セラミツク粒子分散アルミニウム合金複合層の形成方法
US4889969A (en) * 1987-04-28 1989-12-26 Matsushita Electric Industrial Co., Ltd. Reduced-spatter pulse arc welding machine for use with a consumable electrode
US4937417A (en) * 1987-06-25 1990-06-26 Douglas Call, Jr. Metal spraying apparatus
AU596761B2 (en) 1987-12-21 1990-05-10 Lincoln Electric Company, The Apparatus and method of short circuiting arc welding
US4994646A (en) * 1988-05-19 1991-02-19 Mitsubishi Denki Kabushiki Kaisha Pulse arc discharge welding apparatus
CH679839A5 (da) * 1988-07-01 1992-04-30 Aspa Zuerich Ag
US4853515A (en) * 1988-09-30 1989-08-01 The Perkin-Elmer Corporation Plasma gun extension for coating slots
US5495091A (en) * 1989-02-27 1996-02-27 Mitsubishi Denki Kabushiki Kaisha Pulse welding apparatus
WO1990009856A1 (fr) 1989-02-28 1990-09-07 Mitsubishi Denki Kabushiki Kaisha Appareil de soudage par impulsions
US5047612A (en) * 1990-02-05 1991-09-10 General Electric Company Apparatus and method for controlling powder deposition in a plasma spray process
SE467816B (sv) * 1990-02-19 1992-09-21 Gambro Ab System foer beredning av en vaetska avsedd foer medicinskt bruk
FR2667811B1 (fr) * 1990-10-10 1992-12-04 Snecma Dispositif d'apport de poudre pour revetement par traitement au faisceau laser.
JP2597778B2 (ja) * 1991-01-03 1997-04-09 ストラタシイス，インコーポレイテッド 三次元対象物組み立てシステム及び組み立て方法
US5245155A (en) * 1992-03-06 1993-09-14 General Electric Company Single point powder feed nozzle for use in laser welding
FI209U1 (fi) * 1992-03-31 1992-08-05 Rotaweld Oy Doseringsmunstycke foer pulverformigt svetsningstillsatsaemne
JP3250325B2 (ja) 1993-06-15 2002-01-28 株式会社ダイヘン 消耗電極式アーク溶接制御方法及び電源装置
US5408066A (en) * 1993-10-13 1995-04-18 Trapani; Richard D. Powder injection apparatus for a plasma spray gun
US5477025A (en) * 1994-01-14 1995-12-19 Quantum Laser Corporation Laser nozzle
US5717599A (en) * 1994-10-19 1998-02-10 Bpm Technology, Inc. Apparatus and method for dispensing build material to make a three-dimensional article
US5486676A (en) * 1994-11-14 1996-01-23 General Electric Company Coaxial single point powder feed nozzle
US5603853A (en) * 1995-02-28 1997-02-18 The Twentyfirst Century Corporation Method of high energy density radiation beam lap welding
US5579107A (en) * 1995-05-25 1996-11-26 Horiba Instruments, Inc. Method and apparatus for dry particle analysis
US5837960A (en) * 1995-08-14 1998-11-17 The Regents Of The University Of California Laser production of articles from powders
JPH09308968A (ja) 1996-05-17 1997-12-02 Daihen Corp 短絡移行アーク溶接方法
JPH09314328A (ja) 1996-05-29 1997-12-09 Kawasaki Steel Corp 全姿勢溶接方法
US6001426A (en) * 1996-07-25 1999-12-14 Utron Inc. High velocity pulsed wire-arc spray
JPH10244366A (ja) 1997-03-04 1998-09-14 Daihen Corp 短絡移行アーク溶接における溶接チップの消耗度検出方法および検出装置
JPH10296441A (ja) 1997-04-25 1998-11-10 Daihen Corp 短絡移行アーク溶接における溶接チップの消耗度検出方法および検出装置
CN1042601C (zh) 1997-05-30 1999-03-24 清华大学 用于二氧化碳焊接的逆变式弧焊电源时变输出特性控制方法
US6031203A (en) 1997-10-22 2000-02-29 Central Motor Wheel Co., Ltd. Method and apparatus for determining stability of arc welding
US6005215A (en) * 1998-01-28 1999-12-21 Boyd; Larry L. Electric arc spray gun
US6087626A (en) 1998-02-17 2000-07-11 Illinois Tool Works Inc. Method and apparatus for welding
JP3075263B2 (ja) * 1998-06-17 2000-08-14 松下電器産業株式会社 パルス出力制御方法及び消耗電極式パルスアーク溶接装置
JP2000079479A (ja) 1998-09-04 2000-03-21 Daihen Corp 消耗電極ガスシールドアーク溶接電流波形制御方法及び溶接装置
JP3697359B2 (ja) 1998-11-24 2005-09-21 中央精機株式会社 アーク溶接安定性判定方法及び装置
US6322856B1 (en) * 1999-02-27 2001-11-27 Gary A. Hislop Power injection for plasma thermal spraying
WO2000054924A1 (fr) 1999-03-18 2000-09-21 Kabushiki Kaisha Yaskawa Denki Procede de soudage a l'arc a electrode fusible et dispositif associe
JP4271293B2 (ja) 1999-04-09 2009-06-03 中央精機株式会社 アーク溶接の最適制御方法及び装置
US6281466B1 (en) * 1999-06-28 2001-08-28 Newcor, Inc. Projection welding of an aluminum sheet
US6396025B1 (en) * 1999-07-01 2002-05-28 Aeromet Corporation Powder feed nozzle for laser welding
US6258402B1 (en) * 1999-10-12 2001-07-10 Nakhleh Hussary Method for repairing spray-formed steel tooling
US6518545B1 (en) * 2000-02-25 2003-02-11 Serimer Dasa Welding arc penetrating power real-time detection system
DE10015555A1 (de) * 2000-03-30 2001-10-18 Eybl Internat Ag Krems Leder und dessen Zurichtung
US6265689B1 (en) * 2000-04-24 2001-07-24 General Electric Company Method of underwater cladding using a powder-fan plasma torch
US6501049B2 (en) * 2001-01-23 2002-12-31 Lincoln Global, Inc. Short circuit arc welder and method of controlling same
US6498321B1 (en) * 2001-04-09 2002-12-24 Lincoln Global, Inc. System and method for controlling an electric arc welder
JP4703910B2 (ja) * 2001-08-10 2011-06-15 中央精機株式会社 電極チップ摩耗状態の判定装置及び判定方法
US6794608B2 (en) 2001-10-30 2004-09-21 Tri Tool Inc. Welding current control system and method
US6861101B1 (en) * 2002-01-08 2005-03-01 Flame Spray Industries, Inc. Plasma spray method for applying a coating utilizing particle kinetics
AUPS274002A0 (en) 2002-06-03 2002-06-20 University Of Wollongong, The Control method and system for metal arc welding
JP4547850B2 (ja) 2002-07-12 2010-09-22 株式会社ダイヘン アーク溶接の短絡判別方法
JP4739641B2 (ja) * 2002-09-26 2011-08-03 株式会社ダイヘン 短絡アーク溶接用電源装置及びロボット溶接装置
US6933466B2 (en) 2003-05-08 2005-08-23 Illinois Tool Works Inc. Method and apparatus for arc welding with wire heat control
SE525419C2 (sv) * 2003-06-13 2005-02-15 Abb Ab Metod för avstämning av ett system för bågsvetsning samt bågsvetssystem, datorprogramprodukt och datorläsbart medium
SE527841C2 (sv) 2003-11-07 2006-06-20 Esab Ab Svetsmetod apparat och programvara för gasmetallbågsvetsning med kontinuerligt frammatad elektrod
CA2515087C (en) * 2004-09-10 2015-03-17 Sulzer Metco Ag A plasma spraying apparatus and also a method for monitoring the condition of a plasma apparatus
US7992760B2 (en) * 2005-02-09 2011-08-09 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Conduit purging device and method
US8067711B2 (en) * 2005-07-14 2011-11-29 United Technologies Corporation Deposition apparatus and methods
US7708504B2 (en) * 2005-08-29 2010-05-04 Savannah River Nuclear Solutions, Llc Pneumatic conveyance apparatus and process
FR2893360A1 (fr) * 2005-11-15 2007-05-18 Snecma Sa Procede de realisation d'une lechette de labyrinthe d'etancheite, piece thermomecanique et turbomachine comprenant une telle lechette
US7358457B2 (en) * 2006-02-22 2008-04-15 General Electric Company Nozzle for laser net shape manufacturing
US8203095B2 (en) * 2006-04-20 2012-06-19 Materials & Electrochemical Research Corp. Method of using a thermal plasma to produce a functionally graded composite surface layer on metals
NO325931B1 (no) * 2006-07-14 2008-08-18 Agr Subsea As Anordning og fremgangsmate ved stromningshjelp i en rorledning

Also Published As

Publication number Publication date
RU2422255C2 (ru) 2011-06-27
CN101262976B (zh) 2011-07-13
RU2008110889A (ru) 2009-10-20
US20090166344A1 (en) 2009-07-02
AU2006289052A1 (en) 2007-03-15
CN101262976A (zh) 2008-09-10
FI20050896A0 (fi) 2005-09-08
WO2007028858A1 (en) 2007-03-15
BRPI0615564A2 (pt) 2011-05-24
EP1940578A1 (en) 2008-07-09
EP1940578B1 (en) 2017-05-24
FI20050896L (fi) 2007-03-09
FI119923B (fi) 2009-05-15
AU2006289052B2 (en) 2011-06-09
EP1940578A4 (en) 2010-12-29

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