NO850569L - WELDING TIG WELDING SYSTEM - Google Patents
WELDING TIG WELDING SYSTEMInfo
- Publication number
- NO850569L NO850569L NO850569A NO850569A NO850569L NO 850569 L NO850569 L NO 850569L NO 850569 A NO850569 A NO 850569A NO 850569 A NO850569 A NO 850569A NO 850569 L NO850569 L NO 850569L
- Authority
- NO
- Norway
- Prior art keywords
- welding
- current
- circuit
- tig
- value
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims description 64
- 238000000034 method Methods 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
- B23K9/0671—Starting the arc by means of brief contacts between the electrodes
-
- 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
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/073—Stabilising the arc
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Arc Welding In General (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Description
Den foreliggende oppfinnelse vedrører en elektronisk virkende krets, som er beregnet på å monteres på sveiselikerettere under drift, med en basis-strømkrets. The present invention relates to an electronically acting circuit, which is intended to be mounted on welding rectifiers during operation, with a basic current circuit.
De kjente sveisesystemer for TIG-sveising kan oppdelesThe known welding systems for TIG welding can be divided
i to systemer avhengig av måten sveisingen startes på. Det første system benytter skrapetenning, hvor spenningsbuen dannes ved å skrape elektroden mot sveisegjenstanden til det oppnås en gnist. Således vil denne metode frembringe "sug" i materialet ved start og stopp og wolfram-materialet bli etterlatt på sveise-materialet, som medfører at sveisingen ikke vil bli tilfreds-stillende. I tillegg må sveiseelektroden tas ut og pusses hyp-pig. Et annet system benytter en kontaktfri start ved hjelp av en høyspenningsgenerator, som, når gnisten er dannet til sveisegjenstanden vil starte spenningsbuen. Ulempen ved dette system er at gnisten vil bevege seg i en sirkel på sveisegjenstanden og man kan ikke nøyaktig styre hvor sveisingen starter. Videre er systemet meget dyrt. in two systems depending on the way the welding is started. The first system uses scratch ignition, where the voltage arc is formed by scratching the electrode against the welding object until a spark is obtained. Thus, this method will produce "suction" in the material at start and stop and the tungsten material will be left on the welding material, which means that the welding will not be satisfactory. In addition, the welding electrode must be removed and cleaned frequently. Another system uses a non-contact start using a high voltage generator, which, when the spark is formed to the welding object will start the voltage arc. The disadvantage of this system is that the spark will move in a circle on the welding object and you cannot precisely control where the welding starts. Furthermore, the system is very expensive.
Fra engelsk patent nr. 2 054 293 er det kjent et sveise-system som motvirker ulempene ved skrapetenning. Ved dette system oppnår man en mykstart ved sammenkobling av en høyspenning via en separat omformervikling med en tilhørende likeretter, From English patent no. 2 054 293, a welding system is known which counteracts the disadvantages of scratch ignition. With this system, a soft start is achieved by connecting a high voltage via a separate converter winding with an associated rectifier,
som er synkronisert med nettfrekvensen, hvoretter man, når spenningsbuen er tilveiebragt, elektronisk går over til en normal krets med oppover skrånende karakteristikk, med en ny likeretter. Imidlertid er dette en temmelig dyr metode for videregå-ende skrapetenning, som også innbefatter en dyr drosselspole. Brukeren er også for muligheten til å få et elektrisk støt hvis han benytter metallfylling. which is synchronized with the mains frequency, after which, when the voltage arc is provided, one electronically switches to a normal circuit with an upward sloping characteristic, with a new rectifier. However, this is a rather expensive method of progressive scratch ignition, which also includes an expensive choke coil. The user is also for the possibility of receiving an electric shock if he uses metal filling.
Oppfinnelsen adskiller seg fra de kjente systemer vedThe invention differs from the known systems by
ikke å bruke høyspenning ved start og innstillingen finner sted som'en strømregulering. not to use high voltage at start-up and the setting takes place as a current regulation.
Oppfinnelsen består av en elektronisk drevet krets somThe invention consists of an electronically driven circuit which
er beregnet på å monteres på styrte sveiselikerettere med basis-strømkrets . is intended to be mounted on controlled welding rectifiers with a basic circuit.
Det spesielle ved oppfinnelsen er at sveiseelektrodenThe special feature of the invention is that the welding electrode
kan plasseres direkte på sveisegjenstanden uten at sveisespenningsbuen er blitt dannet, fordi bare nettstrømmen på 3-8 A can be placed directly on the welding object without the welding voltage arc having been formed, because only the mains current of 3-8 A
vil gå inn i elektroden. I det øyeblikk elektroden løftes fra sveisegjenstanden. vil nettstrømmen bli hevet til to ganger så meget som den forutinnstilte sveisestrøm, og en spenningsbue tilveiebringes. Deretter senkes strømmen umiddelbart til verdien for den oppover skrånende karakteristiske funksjon er blitt oppnådd. Den oppover skrånende funksjon for styrekrets regu-lerer deretter strømmen opp til den forutbestemte sveisestrøm. Hvis sveisegjenstanden blir berørt under sveisingen, vil styre-kretsen regulere sveisestrørnmen ned til basisstrømnivå, som be-skytter elektroden. will enter the electrode. The moment the electrode is lifted from the welding object. the mains current will be raised to twice the preset welding current and a voltage arc will be produced. Then the current is immediately lowered until the value of the upward sloping characteristic function has been reached. The upward sloping function of the control circuit then regulates the current up to the predetermined welding current. If the welding object is touched during welding, the control circuit will regulate the welding current down to the base current level, which protects the electrode.
Når knappen på sveisehåndtaket slippes løs, vil en senkning nedover finne sted, som medfører at sveisestrørnmen lang-somt senkes til basisstrømnivå og sveisingen stopper. Helningsfunksjonen bevirker at man unngår et "sug" i materialet. When the button on the welding handle is released, a downward lowering will take place, which means that the welding current is slowly lowered to the base current level and the welding stops. The slope function prevents a "suction" in the material.
Under sveisingen med den forutbestemte sveisestrøm erDuring the welding with the predetermined welding current is
det mulig ved utløsning med en brennerbryter å pulsere sveise-strørnmen for regulering av smeltebadet. Reguleringskretsen regu-lerer også gasstrømmen i den magnetiske ventil på en slik måte at man får både for- og etterstrømning av argon. Dette gjøres for å oppnå lettere start og for å unngå oksidering av elektroden under kjølingen. it is possible, by triggering with a torch switch, to pulse the welding current for regulation of the molten bath. The control circuit also regulates the gas flow in the magnetic valve in such a way that you get both a pre- and post-flow of argon. This is done to achieve an easier start and to avoid oxidation of the electrode during cooling.
Fordelene ved oppfinnelsen er at et "sug" unngås, og at man meget nøyaktig kan bestemme hvor sveisingen skal starte. The advantages of the invention are that a "suction" is avoided, and that one can very precisely determine where the welding should start.
Oppfinnelsen skal i den følgende del bli beskrevet ved hjelp av tegningen som viser et eksempel ifølge oppfinnelsen. In the following part, the invention will be described with the help of the drawing which shows an example according to the invention.
Fig. 1 viser et blokkdiagram for bruk ved gjennomføringFig. 1 shows a block diagram for use in implementation
av oppfinnelsen.of the invention.
Sveisesystemet må forbindes med.en tyristordrevet sveise-likeretter med indre basisstrømskrets. Sveisingen er beskrevet med MODE bryter 11 i posisjon TIG-sveising. Wolframelektroden på sveisehåndtaket 6 plasseres på sveisegjenstanden. Bryteren på sveisehåndtaket 1 blir betjent og holdekretsen 2 aktiveres. Herved åpnes magnetventilen 3 og tiden for gasstrømning (krets The welding system must be connected to a thyristor-driven welding rectifier with an internal base current circuit. The welding is described with MODE switch 11 in position TIG welding. The tungsten electrode on the welding handle 6 is placed on the welding object. The switch on the welding handle 1 is operated and the holding circuit 2 is activated. This opens the solenoid valve 3 and the time for gas flow (circuit
4) starter. Etter at gasstrømmingen har stoppet, blir nettstrøms-kretsens på-av del 5 aktivert, som slår på nettstrømmen til elektroden 6. Når elektroden løftes bare noe fra sveisegjenstanden blir sveisespenningsbuen og tomgangsspenningsregula-toren 7 aktivert. Dette vil aktivere startpulskretsen 8. Dette medfører at sveisestrømkretsen 9 kortvarig løfter sveisestrørn-men for dannelse av en stabil sveisespenningsbue -.større enn verdien for den innstilte verdi på regulatoren. Etter at en stabil spenningbue er oppnådd vil strømmen falle til noe over basisstrømsverdien. Samtidig med at spenningsbuen dannes vil reguleringen av sveisespenningsbuen 7 starte for den oppad stig-ende funksjon 10. Dette medfører at sveisestrørnmen for en kort tid vil stige til en forutbestemt verdi-regulering 12. 4) starts. After the gas flow has stopped, the mains circuit's on-off part 5 is activated, which switches on the mains current to the electrode 6. When the electrode is lifted just slightly from the welding object, the welding voltage arc and the no-load voltage regulator 7 are activated. This will activate the start pulse circuit 8. This means that the welding current circuit 9 briefly raises the welding current to form a stable welding voltage arc - greater than the value for the set value on the regulator. After a stable voltage arc is achieved, the current will drop to something above the base current value. At the same time as the voltage arc is formed, the regulation of the welding voltage arc 7 will start for the upward-rising function 10. This means that the welding current will rise for a short time to a predetermined value regulation 12.
Når man ønsker å stoppe sveisingen blir TIG-brennerens bryter 1 slått av, hvorved den nedover hellende regulering starter for å regulere nedover via reguleringskretsen 9. Når reguleringen til basisstrømsnivå er oppnådd blir holdekretsen 2 nullsatt og basisstrømskretsens på-av del 5 slår av basisstrøm-men i sveiselikeretteren. På samme tid starter tiden for gass-etterstrømming 4. Deretter blir magnetventilen 3 slått av, etter at gassetterstrømmingen er stoppet. Tiden for etterstrømming bevirker en unngåelse av oksidasjon av elektrodene under kjøl-ingen . When you want to stop the welding, the TIG torch's switch 1 is turned off, whereby the downward sloping regulation starts to regulate downwards via the regulation circuit 9. When the regulation to the basic current level is achieved, the holding circuit 2 is reset and the on-off part 5 of the basic current circuit switches off the basic current but in the welding rectifier. At the same time, the time for gas reflow 4 starts. Then the solenoid valve 3 is switched off, after the gas reflow has stopped. The time for after-flow causes an avoidance of oxidation of the electrodes during the cooling.
Ved bruk av systemet for heftsveising blir MODE-bryteren bragt i stilling, heftsveising. Sveisingen virker på samme måte som ved TIG-sveising, selv om opp- og nedhelningstiden forkortes til millisekunder. When using the tack welding system, the MODE switch is set to tack welding. The welding works in the same way as TIG welding, although the rise and fall times are shortened to milliseconds.
Ved bruk av systemet til elektrodesveising blir MODE-bryteren plassert i stilling elektrodesveising. Dette medfører at basisstrømkretsen konstant aktiveres. Helningsfunksjonen 10 og gassreguleringskretsen 4 er utkoblet. Man kan nå gjennom-føre en normal elektrodesveising med oppkoblet utstyr. When using the system for electrode welding, the MODE switch is placed in the electrode welding position. This means that the base current circuit is constantly activated. The tilt function 10 and the throttle control circuit 4 are switched off. You can now carry out normal electrode welding with connected equipment.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK274283A DK152413B (en) | 1983-06-15 | 1983-06-15 | TIG WELDING WELDING SYSTEM |
Publications (1)
Publication Number | Publication Date |
---|---|
NO850569L true NO850569L (en) | 1985-02-14 |
Family
ID=8115309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO850569A NO850569L (en) | 1983-06-15 | 1985-02-14 | WELDING TIG WELDING SYSTEM |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS60501548A (en) |
AU (1) | AU565763B2 (en) |
CA (1) | CA1228896A (en) |
DE (2) | DE3490272T1 (en) |
DK (1) | DK152413B (en) |
FI (1) | FI850602L (en) |
FR (1) | FR2548067B1 (en) |
GB (1) | GB2156607B (en) |
NO (1) | NO850569L (en) |
SE (1) | SE8500692D0 (en) |
WO (1) | WO1985000024A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4809014B2 (en) * | 2005-07-29 | 2011-11-02 | 株式会社ダイヘン | Arc start control method for robot welding |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE532472A (en) * | 1953-10-14 | |||
GB881531A (en) * | 1958-11-21 | 1961-11-08 | Rolls Royce | Improvements in and relating to gas shielded arc welding |
DE1565062A1 (en) * | 1965-04-23 | 1970-01-15 | Siemens Ag | Arrangement for arc stabilization of controllable multi-process welding rectifiers |
DE1615363C3 (en) * | 1967-07-04 | 1974-11-07 | Messer Griesheim Gmbh, 6000 Frankfurt | Device for stabilizing and igniting welding arcs using current pulses |
DE1937879B2 (en) * | 1969-07-25 | 1970-10-22 | Kurt Stork | Stabilizing arc circuit for aluminium welding - with non-consumable tungsten electrode |
DE2407703A1 (en) * | 1974-02-18 | 1975-08-28 | Ewert Poort | Arc initiator for welding apparatus - arc struck with apparatus at maximum output is subsequently reduced to chosen output |
DE2459309A1 (en) * | 1974-12-14 | 1976-06-16 | Messer Griesheim Gmbh | Arc ignition for arc welding - with current supply set at lower value while electrodes touch to reduce loading |
US4282569A (en) * | 1979-07-12 | 1981-08-04 | Union Carbide Corporation | Constant current welding power supply with an upslope starting current |
AT373109B (en) * | 1981-05-22 | 1983-12-27 | Elin Union Ag | CIRCUIT ARRANGEMENT FOR RAISING THE IGNITION CURRENT IN A BRUSHLESS ROTATING WELDING MACHINE |
JPS5870975A (en) * | 1981-10-23 | 1983-04-27 | Ishikawajima Harima Heavy Ind Co Ltd | Emergency stopping method in tig welding |
-
1983
- 1983-06-15 DK DK274283A patent/DK152413B/en not_active Application Discontinuation
-
1984
- 1984-05-25 WO PCT/DK1984/000049 patent/WO1985000024A1/en active Application Filing
- 1984-05-25 GB GB08503548A patent/GB2156607B/en not_active Expired
- 1984-05-25 JP JP50223484A patent/JPS60501548A/en active Pending
- 1984-05-25 DE DE19843490272 patent/DE3490272T1/en active Pending
- 1984-05-25 DE DE19843490272 patent/DE3490272C2/de not_active Expired - Lifetime
- 1984-05-25 AU AU30173/84A patent/AU565763B2/en not_active Ceased
- 1984-06-14 FR FR8409336A patent/FR2548067B1/en not_active Expired
- 1984-06-15 CA CA000456684A patent/CA1228896A/en not_active Expired
-
1985
- 1985-02-13 FI FI850602A patent/FI850602L/en not_active Application Discontinuation
- 1985-02-14 NO NO850569A patent/NO850569L/en unknown
- 1985-02-14 SE SE8500692A patent/SE8500692D0/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
AU3017384A (en) | 1985-01-11 |
DK152413B (en) | 1988-02-29 |
FR2548067B1 (en) | 1988-01-15 |
JPS60501548A (en) | 1985-09-19 |
AU565763B2 (en) | 1987-09-24 |
DE3490272C2 (en) | 1990-11-22 |
GB2156607A (en) | 1985-10-09 |
WO1985000024A1 (en) | 1985-01-03 |
FI850602A0 (en) | 1985-02-13 |
FR2548067A1 (en) | 1985-01-04 |
GB2156607B (en) | 1986-11-12 |
GB8503548D0 (en) | 1985-03-13 |
SE8500692L (en) | 1985-02-14 |
DK274283A (en) | 1984-12-16 |
DE3490272T1 (en) | 1985-07-25 |
FI850602L (en) | 1985-02-13 |
CA1228896A (en) | 1987-11-03 |
DK274283D0 (en) | 1983-06-15 |
SE8500692D0 (en) | 1985-02-14 |
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