WO2017114722A1 - Procédé et dispositif de soudage de joints de soudure en utilisant un ensemble à plusieurs électrodes - Google Patents

Procédé et dispositif de soudage de joints de soudure en utilisant un ensemble à plusieurs électrodes Download PDF

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Publication number
WO2017114722A1
WO2017114722A1 PCT/EP2016/082206 EP2016082206W WO2017114722A1 WO 2017114722 A1 WO2017114722 A1 WO 2017114722A1 EP 2016082206 W EP2016082206 W EP 2016082206W WO 2017114722 A1 WO2017114722 A1 WO 2017114722A1
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WO
WIPO (PCT)
Prior art keywords
welding
electrode
voltage
electrodes
current
Prior art date
Application number
PCT/EP2016/082206
Other languages
German (de)
English (en)
Inventor
Gökhan Biyikli
Original Assignee
Gökhan Biyikli
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 Gökhan Biyikli filed Critical Gökhan Biyikli
Publication of WO2017114722A1 publication Critical patent/WO2017114722A1/fr

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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
    • B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
    • 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
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
    • B23K9/1735—Arc welding or cutting making use of shielding gas and of a consumable electrode making use of several 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
    • B23K9/18—Submerged-arc welding
    • B23K9/186—Submerged-arc welding making use of a consumable electrodes
    • B23K9/188—Submerged-arc welding making use of a consumable electrodes making use of several electrodes

Definitions

  • the invention relates to a method for welding seam joints to metal components using a multi-electrode arrangement having at least two welding electrodes arranged one behind the other in a welding direction, the welding electrodes of the multi-electrode arrangement simultaneously producing a common melt bath, the method comprising controlling the welding current of each welding electrode ,
  • the invention relates to a method for submerged-arc welding of seam joints on metal workpieces
  • the invention also relates to an apparatus for the welding of seam joints in metallic components comprising a multi-electrode arrangement (1) having at least two welding electrodes which are arranged in a welding direction one behind the other, wherein the welding electrodes of the multi-electrode array simultaneously generate a common molten bath, at least one welding ⁇ current generator with means for controlling the welding current of each welding electrode.
  • Submerged arc welding is an arc welding process in which the welding arc burns between the wire electrode material and the workpiece to be welded.
  • the special The process is characterized in that the welding arc is covered by a granular powder.
  • weld filler wire or strip usually serve electrodes and a Sch procedurepul ⁇ ver.
  • the wire or tape electrodes are formed by a forward feed system conveyed to the welding point.
  • the welding flux passes from a reservoir through a tube by gravity or through a pneumatic conveying system also to the weld site and thereby covers the molten bath generated by the Sch wholichtbo ⁇ gen against harmful influences of the atmos- phere from.
  • the submerged arc welding process is usually carried out as so- ⁇ -called Eindrahtsch healthhabilit as well as a parallel wire welding and tandem welding process.
  • parallel wire welding two or three smaller diameter wire electrodes are melted instead of a common arc wire.
  • the advantage of this process variant is an increase in the Abschmelzleis ⁇ tion, which goes hand in hand with a higher welding speed. Basically, the increase in welding speed limits.
  • the welding current strengths In order to weld through the same cross sections, the welding current strengths must be increased. The higher the number of welding heads used and thus the generated arcs in a single melt bath, the stronger influence the magnetic fields of the individual welding electrodes of the multi-electrode arrangement.
  • the so-called penetration depth is given only for the leading in the welding direction of the first arc, the operation of the trailing arcs is greatly attenuated.
  • the result is that as the number of arcs running one behind the other and the overall increase in the total current increases, the welding speed can be increased, but the burn-in loss that occurs as a result of the speed increase is less and less balanced.
  • the welding speed can therefore not be linear with the number of used Increase welding heads. In particular, the influence
  • a submerged-arc multi-wire welding system is known, for example, from EP 0 116 664 A1.
  • the invention is therefore based on the object to provide a method of the type mentioned, which is also improved in terms of the welding speed to be achieved, the method is basically not on the
  • Multi-electrode arrangement simultaneously produce a common melt bath, the method comprising a control of the welding current of each welding electrode, wherein the first in
  • Welding direction leading welding electrode with DC or AC or three-phase alternating current is operated and at least a second trailing in the welding direction welding electrode is operated with AC, wherein the AC ⁇ voltage of the second welding electrode is held at least once during each period over a predetermined holding time on a span ⁇ tion , which is at most 50%, preferably at most 20% of the maximum amount of voltage of the first or second welding electrode.
  • a period in the sense of the invention is a successive positive and negative half-cycle.
  • the period duration is equal to the reciprocal of the frequency of the alternating current.
  • the voltage of the welding electrode is maintained at a relatively low level over a predetermined holding time, for example of the order of microseconds, milliseconds, or seconds, which is at most 50%, preferably at most 20% maximum amount of voltage of the first or second welding electrode.
  • the voltage can the example, held on the hold time to zero ⁇ .
  • the term "magnitude" in this sense is to be understood mathematically
  • the voltage has a positive maximum and a negative maximum
  • a holding time is provided in which the melting rate of the second welding electrode is at most 50%. preferably at most 20% of the possible full Abschmelz intricate.
  • the voltage applied to the AC powered AC welding electrode does not necessarily have a sinusförmi ⁇ ges signal, but the signal may also
  • Half-period over a predetermined holding time is maintained at a voltage which is at most 50%, preferably at most
  • the AC voltage of the second welding electrode can be modulated by means of a function generator.
  • a target ⁇ voltage function for the alternating-current characteristic of the two-th welding electrode is predetermined and by means of a
  • the multi-electrode arrangement comprises at least three welding electrodes, wherein a third or further welding electrode trailing in the welding direction is held at a voltage at least once during each period over a predetermined holding time which is at most 50%, preferably at most 20%, of the maximum voltage of the respective welding electrode.
  • the second, third or each further trailing in the direction of welding Sch healthelekt ⁇ rode operated in each case periodically with greatly reduced power ben is, so that this welding electrode is substantially melted only passively during the hold period, namely by the heat of already generated by the leading welding electrode melt bath.
  • the holding time of the third or further welding electrode coincides with a multi-electrode drive North ⁇ voltage or at a Mehrelektrodensch facedung with three or more electrodes with the maximum magnitude of the voltage of each of the leading in the direction of welding, preferably an immediate bar adjacent welding electrode is particularly favorable.
  • the trailing welding electrode is always operated with reduced or no appreciable welding power, when the respective leading welding electrode is operated at maximum power.
  • leading and “lagging” in the sense of the present invention refer to the spatial arrangement of the welding electrodes to each other, since the welding electrodes of a welding electrode assembly in the context of the present invention are moved parallel in time relative to the workpiece. Those skilled in the art will recognize that it is not important in this context whether the welding electrodes are moved with respect to the stationary workpiece or the workpiece with respect to the fixed welding electrodes. In an advantageous variant of the method according to the
  • the first electrode leading in the welding direction with alternating current as a phase alternating current or as a three-phase alternating current.
  • the invention provides that in each case a welding position in a first direction and a second Sch thoroughlyla ⁇ ge is added in a second direction, on the one hand, the welding speed is increased, since a conversion of the electric ⁇ denan Aunt of and / or the workpieces is not required
  • the method according to the invention has the advantage that three-axis tension conditions or dreidimensiona ⁇ le voltage curves be avoided. This is automatic less rework, such as calibration, re-rolling or straightening the workpieces required.
  • the method is performed as a method of sub-powder welding using an array of welding heads to provide the welding electrodes, wherein the welding electrodes are formed as wire or tape electrodes.
  • the invention is not limited to submerged arc welding, but other welding methods using the principle of the invention are practicable and in the context of
  • Another aspect of the invention relates to an apparatus for welding seam joints to metal components comprising a multi-electrode assembly having at least two
  • Welding electrodes arranged in succession in a welding direction wherein the welding electrodes (4) of the multi-electrode assembly (simultaneously creating a common melt bath, at least one welding current generator with means for controlling the welding current of each welding electrode, wherein the first welding direction leading welding electrode with DC or AC or three-phase alternating current is supplied with current and at least one second welding direction trailing welding electrode is energized with alternating current and the welding current generator is designed so that the voltage of the second welding electrode at least once during each period over a predetermined holding time can be maintained at a voltage not exceeding 50%, preferably at most 20% of the maximum amount of voltage of the first or second welding electrode.
  • FIG. 1 shows a multi-electrode arrangement for use with the method according to the invention
  • Figure 2 shows the circuit diagram of the secondary part of a welding ⁇ power generator for use in the method according to the invention
  • FIG. 3 shows an alternative embodiment of the secondary part of the welding current generator shown in FIG. 2,
  • FIG. 4 shows a voltage function for the alternating current characteristic of a welding electrode operated according to the method according to the invention
  • Figure 5 shows an alternative voltage function for the AC characteristic of the welding electrode
  • FIG. 6 shows a further alternative voltage function for the AC characteristic of a welding electrode operated with three-phase AC voltage according to the method according to the invention.
  • Figure 1 shows a multi-electrode assembly 1 according to the invention, which is part of a device for submerged arc welding. Means for applying welding powder and suction of residual powder and means for guiding the multi-electrode assembly 1 relative to one or more workpieces are not shown in the drawing for reasons of simplicity.
  • the method according to the invention provides for welding seam joints on metal components using the multi-electrode arrangement 1 shown in FIG Seam joint is added in multiple layers between the components, wherein a first layer is generated for example in a first welding operation in a first welding direction and at least one second layer with a second welding operation in a second welding direction.
  • the multi- electrode arrangement 1 used for this purpose shown in FIG. 1, comprises three guide tubes 2 with a nozzle 3 and respective wire electrodes 4 emerging from the nozzle 3.
  • the wire electrodes 4 are respectively fed to the relevant nozzle 3 via a feed system (not shown).
  • a guide tube 2 and a nozzle 3 form a welding head 5a, 5b, 5c in the sense of the present invention.
  • a welding track 6 is produced in a seam joint of a metal component or second metal components, which extends between the points A and B.
  • the multi-electrode arrangement 1 comprises a total of three welding heads, of which a first welding head 5a and a third welding head 5c are arranged symmetrically with respect to a welding head 5b. All wire electrodes 4 of the
  • Multi-electrode arrangement 1 simultaneously generate an arc during the welding process, with all the wire electrodes 4 simultaneously producing a common melt bath.
  • the wire electrodes 4 as welding electrodes according to the invention are connected to a welding power source, for example to a welding power generator.
  • the welding power generator is designed, for example, as a transformer with a primary side 7 and one or more secondary parts 8.
  • the welding power generator further comprises at least one higher-level controller 9 and at least one microprocessor 10, which determines the current characteristic of the current emitted by the secondary part 8.
  • the secondary part 8 is designed so that it can generate both direct current and alternating current of a given characteristic.
  • the secondary part 8 is on the one hand to the workpiece and on the other hand to a
  • each Drahtelek ⁇ electrode 4 is connected to a secondary part 8.
  • each wire electrode 4 is at least two
  • microprocessor 10 allows you to control the secondary part 8 of the welding power generator so that, for example, a pulsed AC with a predetermined voltage function (target voltage function) can be generated at the respective wire electrode 4.
  • a pulsed AC with a predetermined voltage function target voltage function
  • the microprocessor 10 includes a function generator 11 which digitally generates a predetermined voltage function.
  • the microprocessor 10 controls two ideal switches 12 in the secondary part 8, by means of which, for example, an alternating voltage with the desired voltage characteristic can be generated on the terminals 13 and 14 for the workpiece on the one hand and the wire electrode 4 on the other hand.
  • the alternating voltage is generated, for example as pulsed alternating ⁇ voltage by pulse width modulation, wherein the control of the secondary part 8 is made in the variant shown in Figure 2 as so-called Class-D circuit.
  • the circuit of the secondary part 8 according to the circuit diagram shown in FIG. 3 is designed as a so-called 2Q circuit, in which the ideal switches 12, which may be designed, for example, as transistors, are driven in parallel.
  • FIG. 4 shows a pulsed alternating current, the voltage of which, after every half-cycle in the order of magnitude of milliseconds, is kept at a voltage which in the exemplary embodiment shown is zero.
  • the voltage can not exceed 20% of the maximum amount of voltage. This is to be understood as the absolute amount of the voltage regardless of the polarity.
  • the time period T is, for example, a cycle over 360 ° of a sine wave, in which case the half period is 180 °.
  • the hold time is indicated by t h in the diagram shown, in which the voltage is plotted over time.
  • FIG. 4 shows a pulse current with a square-wave signal with the period / period T.
  • Figure 5 illustrates an alternating current with an approximately sinusoidal signal, a holding time h t in milliseconds after each half-oscillation or is provided after each half period.
  • FIG. 6 shows the voltage function of a three-phase alternating voltage with three approximately sinusoidal signal waveforms, each signal being kept in the range of zero voltage after every half-cycle in the range of milliseconds.
  • the magnitude of the voltage during the holding time t may not necessarily be zero h, it must, for example, 50% or 20% or belie ⁇ bige intermediate values between 50% and 0% of the amount of the maxima ⁇ len voltage amount.
  • the holding times t h all three phases so temporally adjacent to each other provided that the power of the respective wire electrode between two phases, that is reduced to 240 ° or is zero.
  • Figures 4 to 6 show, respectively, the voltage function for a wire electrode 4, wherein the 4 to 5, the voltage function ⁇ shows the voltage function for a three-phase alternating current for a single phase and FIG. 6
  • the multi-electrode arrangement 1 is guided from point A to point B with respect to the workpiece, the third welding head designated by 5c comprising the first wire electrode 4 leading in the welding direction, which is operated with direct current.
  • the second trailing electrode wire 4, which is supplied via the second welding head 5b is operated with exchangeable ⁇ current, in which a characteristic of the target voltage functions according to the figures 4 to 6 corresponds.
  • the voltage functions of the trailing wire electrodes 4 can be controlled so that the holding time of the last in the direction of the welding electrode 4 coincides with a maximum of leading directly in the welding direction wire electrode 4.
  • the first welding electrode 4 leading to the welding direction is fed to the first welding head 5a.
  • this welding electrode 4 is operated with direct current and the respective trailing welding electrodes 4 with an alternating current, which has a voltage function according to the figures of Figures 4 to 6.

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

Abstract

L'invention concerne un procédé de soudage de joints de soudure sur des pièces métalliques en utilisant un ensemble à plusieurs électrodes (1) comportant au moins deux électrodes de soudage (4) qui sont disposées les unes derrière les autres dans une direction de soudage, les électrodes de soudage (4) de l'ensemble à plusieurs électrodes (1) générant simultanément un bain de fusion commun, le procédé comportant une commande du courant de soudage de chaque électrode de soudage (4), la première électrode de soudage (4) en tête dans la direction de soudage fonctionnant avec un courant continu et au moins une deuxième électrode de soudage (4) à l'arrière dans la direction de soudage fonctionnant avec un courant alternatif, la tension de la deuxième électrode de soudage (4) étant maintenue à une tension pendant une durée de maintien prédéfinie au moins une fois pendant chaque période, laquelle tension vaut au maximum 50 %, de préférence au maximum 20 % de la valeur absolue maximale de la tension de la première ou de la deuxième électrode de soudage (4).
PCT/EP2016/082206 2015-12-29 2016-12-21 Procédé et dispositif de soudage de joints de soudure en utilisant un ensemble à plusieurs électrodes WO2017114722A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102015226805 2015-12-29
DE102015226805.5 2015-12-29
DE102016209124.7 2016-05-25
DE102016209124.7A DE102016209124A1 (de) 2015-12-29 2016-05-25 Verfahren und Vorrichtung zum Schweißen von Nahtfugen

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WO2017114722A1 true WO2017114722A1 (fr) 2017-07-06

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140140A (en) * 1990-11-15 1992-08-18 Pollack Alex J Method and apparatus of submerged arc welding with electrodes in tandem
US20050051524A1 (en) * 2003-09-08 2005-03-10 Lincoln Global, Inc. Electric arc welder and method for controlling the welding process of the welder
US20090308855A1 (en) * 2006-06-14 2009-12-17 Matsushita Electric Industrial Co., Ltd. Tandem arc welding device
WO2015124996A2 (fr) * 2014-02-21 2015-08-27 Lincoln Global, Inc. Procédé et système pour utiliser une combinaison d'alimentation en fil d'apport et de source d'énergie de haute intensité pour soudage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0116664A1 (fr) 1983-02-19 1984-08-29 Schweissindustrie Oerlikon Bührle AG Procédé de soudage a l'arc submergé en système à plusieurs fils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140140A (en) * 1990-11-15 1992-08-18 Pollack Alex J Method and apparatus of submerged arc welding with electrodes in tandem
US20050051524A1 (en) * 2003-09-08 2005-03-10 Lincoln Global, Inc. Electric arc welder and method for controlling the welding process of the welder
US20090308855A1 (en) * 2006-06-14 2009-12-17 Matsushita Electric Industrial Co., Ltd. Tandem arc welding device
WO2015124996A2 (fr) * 2014-02-21 2015-08-27 Lincoln Global, Inc. Procédé et système pour utiliser une combinaison d'alimentation en fil d'apport et de source d'énergie de haute intensité pour soudage

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