WO2018086629A1 - Procédé et dispositif de soudage à l'arc à deux fils - Google Patents

Procédé et dispositif de soudage à l'arc à deux fils Download PDF

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Publication number
WO2018086629A1
WO2018086629A1 PCT/CN2017/111659 CN2017111659W WO2018086629A1 WO 2018086629 A1 WO2018086629 A1 WO 2018086629A1 CN 2017111659 W CN2017111659 W CN 2017111659W WO 2018086629 A1 WO2018086629 A1 WO 2018086629A1
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WO
WIPO (PCT)
Prior art keywords
wire
switch
power source
arc welding
direct current
Prior art date
Application number
PCT/CN2017/111659
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English (en)
Chinese (zh)
Inventor
邱光
耿正
王巍
Original Assignee
深圳市瑞凌实业股份有限公司
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 深圳市瑞凌实业股份有限公司 filed Critical 深圳市瑞凌实业股份有限公司
Publication of WO2018086629A1 publication Critical patent/WO2018086629A1/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
    • 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
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B23K9/1043—Power supply characterised by the electric circuit

Definitions

  • the invention relates to the field of arc welding technology, and in particular to a twin wire arc welding method and device.
  • Double wire arc welding is an efficient and low heat input arc welding method, which has a wide range of applications and needs in the field of industrial welding.
  • the main feature of twin wire arc welding is that two separate arcs are formed between the two ends of the wire that are close to each other but insulated from each other and the welded workpiece, but share a single molten pool.
  • twin wire arc welding In the existing twin wire arc welding system, two separate melt pulse welding power sources with cooperative control functions are generally used.
  • the twin wire welding device thus constructed is complicated in construction and high in cost.
  • a primary object of the present invention is to provide a twin wire arc welding apparatus aimed at simplifying the construction of a twin wire arc welding apparatus and reducing the cost.
  • the present invention provides a twin wire arc welding device, comprising a wire feeding mechanism, a first wire guiding nozzle, a second wire guiding nozzle, a DC power source, a first switch and a second switch;
  • the wire feeding mechanism sends the first welding wire and the second welding wire to the first wire guiding nozzle and the second wire guiding nozzle respectively;
  • the first switch and the second switch receive the control signals and are turned on in turn to control the DC power supply to sequentially supply power to the first wire contact tip and the second wire contact tip.
  • one end of the DC power source is respectively connected to an input end of the first switch and an input end of the second switch, and an output end of the first switch is connected to the first wire contact tip, the first The output of the two switches is connected to the second wire tip, and the other end of the DC power source is connected to the workpiece to be welded.
  • the duty ratios of the first switch and the second switch are equal.
  • the first switch and the second switch are both turned on during a preset duration of the switching on.
  • the preset time is less than 1/2 of the first switch and the second switch on time.
  • the DC power source is a constant voltage DC power source or a constant current DC power source.
  • the invention provides a twin wire arc welding method comprising the following steps:
  • the wire feeding mechanism sends the first welding wire and the second welding wire to the first wire guiding nozzle and the second wire guiding nozzle respectively;
  • the first switch receives the control signal to be turned on to control the DC power supply to supply power to the first wire conductive nozzle, and the DC power source, the first welding wire, and the workpiece to be welded form a first current loop, and the first wire end and the workpiece to be welded Forming a first arc between them;
  • the second switch receives the control signal to be turned on to control the DC power supply to supply power to the second welding wire nozzle, the DC power source, the second welding wire, and the workpiece to be welded form a second current loop, and the second wire end and the workpiece to be welded A second arc is formed between them.
  • the first switch and the second switch are simultaneously turned on within a preset time.
  • the preset time is less than 1/2 of the first switch and the second switch on time.
  • the DC power source is a constant voltage DC power source or a constant current DC power source.
  • the technical solution of the present invention forms a twin wire arc welding device by providing a wire feeding mechanism, a first wire guiding nozzle, a second wire guiding nozzle, a DC power source, a first switch and a second switch.
  • the wire feeding mechanism performs wire feeding; the DC power source supplies power to the first wire guiding nozzle and the second wire guiding nozzle.
  • the first switch and the second switch receive an external control signal, so that the turns are turned on in turn to control the DC power supply to sequentially supply power to the first wire tip and the second wire tip, the wire and the workpiece to be welded An arc is generated between them, and the huge heat generated by the arc melts the wire to achieve welding of the workpiece to be welded.
  • the technical solution of the invention realizes double wire arc welding with only one DC power source, and requires two fusion pole pulse welding power sources with coordinated control functions compared with the existing twin wire arc welding system, which simplifies the double wire arc welding device and reduces the device. cost.
  • FIG. 1 is a schematic structural view of an embodiment of a twin wire arc welding apparatus according to the present invention
  • FIG. 2 is a waveform diagram of current I1 in FIG. 1;
  • Figure 3 is a waveform diagram of the current I2 of Figure 1;
  • FIG. 4 is a waveform diagram of the current IW of FIG. 1.
  • first, second, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • the invention proposes a twin wire arc welding device.
  • the twin wire arc welding device comprises a wire feeding mechanism F1 and a wire feeding mechanism F2, a first wire guiding tip T1, a second wire guiding tip T2, a DC power source V1, and a first switch. Q1 and second switch Q2.
  • the wire feeding mechanism F1 and the wire feeding structure F2 respectively send the first welding wire E1 and the second welding wire E2 to the first wire guiding nozzle T1 and the second wire guiding nozzle T2; the DC power source V1 is given to the first welding wire
  • the first nozzle Q1 and the second switch Q2 receive the control signal, and are sequentially turned on to control the DC power source V1 to sequentially feed the first wire contact tip T1 and The second wire tip T2 is powered.
  • first welding wire E1 and the second welding wire E2 are automatically fed into the first welding wire tip T1 and the second welding wire tip T2, respectively, by using the wire feeding mechanism F1 and the wire feeding structure F2, and the first wire is electrically conductive.
  • the nozzle T1 and the second wire tip T2 are disposed in the wire gun 2 such that the angle between the two wires is between 0 ⁇ and 90 °.
  • a first welding current loop is formed between the DC power source V1, the first welding wire tip T1, and the workpiece W to be welded, and a first welding arc is formed between the end of the first welding wire E1 and the workpiece W to be welded; the DC power source V1, the second A second welding current loop is formed between the wire tip T2 and the workpiece W to be welded, and a second welding circuit is formed between the end of the second wire E2 and the workpiece W to be welded.
  • the twin wire arc welding apparatus further includes a controller (not shown) that outputs a control signal to the controlled end of the first switch Q1 and the controlled end of the second switch Q2.
  • the first switch Q1 and the second switch Q2 are turned on in turn.
  • the DC power source is connected to the first wire tip T1 and the second wire tip T2 through the first switch Q1 and the second switch Q2, respectively, and supplies power to the two wires.
  • the first switch Q1 and the second switch Q2 are switched in such a manner that the phase difference is 180 , so that the DC power source V1 is paired with the first wire tip T1 and the second wire tip T2.
  • This mode of operation only provides peak voltage and no base current, so electromagnetic interference between the two arcs can be better avoided.
  • This method uses a high deposition rate twin wire gun with a distance of less than 10 mm between the two wires.
  • the first switch Q1 and the second switch Q2 can adopt power switches such as IGBTs and MOSFETs, and other electronic switches or devices capable of realizing this function, which are not enumerated here.
  • the technical solution of the present invention forms a double by providing a wire feeding mechanism F1 and a wire feeding mechanism F2, a first wire tip T1, a second wire tip T2, a DC power source V1, a first switch Q1 and a second switch Q2. Wire arc welding device.
  • the wire feeding mechanism F1 and the wire feeding mechanism F2 perform wire feeding; the DC power source V1 supplies power to the first wire tip T1 and the second wire tip T2.
  • the first switch Q1 and the second switch Q2 receive an external control signal, so that the turns are turned on in turn to control the DC power source V1 to sequentially supply power to the first wire tip T1 and the second wire tip T2.
  • the technical solution of the invention realizes double wire arc welding with only one DC power source, and requires two fusion pole pulse welding power sources with coordinated control functions compared with the existing twin wire arc welding system, which simplifies the double wire arc welding device and reduces the device. cost.
  • one end of the DC power source V1 is respectively connected to an input end of the first switch Q1 and an input end of the second switch Q2, and an output end of the first switch Q1 and the first wire contact tip T1 Connected, the output end of the second switch Q2 is connected to the second wire contact tip T2, and the other end of the DC power source V1 is connected to the workpiece W to be welded.
  • the duty ratios of the first switch Q1 and the second switch Q2 are equal. That is, the first switch Q1 and the second switch Q2 have the same on-time.
  • the first switch Q1 and the second switch Q2 are both turned on within a preset duration of the switching on. It is easy to understand that the preset time should be smaller than the on-time of the first switch Q1 and the second switch Q2.
  • the size of the preset time can be set according to the specific welding requirements.
  • the arc-stable switching in the no-base current mode is ensured by a short time overlap of the two power electronic switches.
  • the pulse peak voltages of the two wires are the same, but the pulse current peaks can be adjusted by different duty cycles. Therefore, two wires of different diameters, different materials and different wire feed speeds can be used to meet different welding process requirements.
  • the preset time is less than 1/2 of the on-time of the first switch Q1 and the second switch Q2. Then, the arc displacement generated by the mutual attraction between the first arc A1 and the second arc A2 has sufficient time to return to the original position, and the overall welding process is relatively stable.
  • the DC power source is a constant voltage DC power source or a constant current DC power source.
  • V1 in FIG. 1 is the above-mentioned DC power supply, and the first switch Q1 and the second switch Q2 change the single output power of the DC power supply V1 into a dual output power supply, and control the turn-on timing of the first switch Q1 and the second switch Q2. Therefore, the DC power source V1 can be time-divided, and the first wire E1 and the second wire E2 can be simultaneously supplied with power.
  • the twin wire welding gun of Fig. 1 has a first wire tip T1 and a second wire tip T2 insulated from each other, and the first wire E1 and the second wire E2 are fed by a wire feeding mechanism F1 and a wire feeding mechanism F2.
  • the DC power supply V1, the first switch Q1 and the second switch Q2 in the dashed box in FIG. 1 can be regarded as a power source 1 as a whole, and the first switch Q1 of the power source 1 is connected to the first wire contact tip T1. Supplying power to the first welding wire E1; the second switch Q2 of the power supply 1 is connected to the second welding wire contact tip T2, and supplies power to the welding wire E2, the power supply 1
  • the negative electrode of the medium-DC power supply V1 receives the workpiece W.
  • the first arc A1 in Fig. 1 is an arc established between the first welding wire E1 and the electric welding workpiece W
  • the second arc A2 is an electric arc established between the second welding wire E2 and the workpiece W to be welded.
  • the turn-on timing and the wire and workpiece current waveforms of the two high-power electronic switches of the first switch Q1 and the second switch Q2 in FIG. 1 are as shown in FIGS. 2 to 4.
  • the conduction phases of the first switch Q1 and the second switch Q2 are mutually different by 180 ⁇ , or the second arc A2 is extinguished during the operation of the first arc A1, and vice versa.
  • the first arc A1 is extinguished.
  • This mode of operation completely eliminates electromagnetic interference between the two arcs, but may cause a transition failure between the first arc A1 and the second arc A2 arc.
  • a temporary common on-time ⁇ t is set, that is, before the first switch Q1 is turned off, the second switch Q2 is turned on in advance; also in the second switch Q2.
  • the first switch Q1 is turned on in advance. This ensures a stable switching between the first arc A1 and the second arc A2.
  • Adjusting the common on-time ⁇ t during the switching of the first switch Q1 and the second switch Q2 can increase the welding current without changing the wire feed speed.
  • the first arc A1 and the second arc A2 arc may mutually attract each other, but as long as ⁇ t is less than 1/1 of the first switch Q1 or the second switch Q2 2
  • the first arc A1 and the second arc A2 will attract each other, and the generated arc displacement has enough time to return to the original position, and the overall welding process is stable.
  • twin wire arc welding method comprising the following steps:
  • the first welding wire and the second welding wire are respectively sent to the first welding wire and the second welding wire through the wire feeding mechanism, and the first welding wire and the second welding wire are supplied by the DC power source;
  • the first switch receives the control signal to be turned on to control the DC power supply to supply power to the first wire conductive nozzle, and the DC power source, the first welding wire, and the workpiece to be welded form a first current loop, and the first wire end and the workpiece to be welded Forming a first arc between them;
  • the second switch receives the control signal to be turned on to control the DC power supply to supply power to the second welding wire nozzle, the DC power source, the second welding wire, and the workpiece to be welded form a second current loop, and the second wire end and the workpiece to be welded A second arc is formed between them.
  • the first switch and the second switch are turned on in turn, and the first arc and the second arc are controlled to alternately weld the workpiece for welding.
  • first switch and the second switch are commonly turned on within a preset time.
  • the preset time is less than 1/2 of the first switch and the second switch on time.
  • the DC power source is a constant voltage DC power source or a constant current DC power source.

Abstract

La présente invention concerne un dispositif de soudage à l'arc à deux fils comprenant des mécanismes d'alimentation en fil (F1, F2), une première buse conductrice de fil de soudage (T1), une seconde buse conductrice de fil de soudage (T2), une source d'alimentation en courant continu (V1), un premier commutateur (Q1) et un second commutateur (Q2). Les mécanismes d'alimentation en fil (F1, F2) fournissent respectivement un premier fil de soudage (E1) et un second fil de soudage (E2) à la première buse conductrice de fil de soudage (T1) et à la seconde buse conductrice de fil de soudage (T2), et le premier commutateur (Q1) et le second commutateur (Q2) reçoivent des signaux de commande et s'allument de manière séquentielle, de manière à commander la source d'alimentation en courant continu (V1) pour alimenter séquentiellement la première buse conductrice de fil de soudage (T1) et la seconde buse conductrice de fil de soudage (T2). La présente invention concerne également un procédé de soudage à l'arc à deux fils. Le dispositif de soudage à l'arc à deux fils présente une structure simplifiée et des coûts réduits.
PCT/CN2017/111659 2016-11-11 2017-11-17 Procédé et dispositif de soudage à l'arc à deux fils WO2018086629A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201611005197.3A CN106513924B (zh) 2016-11-11 2016-11-11 双丝电弧焊接方法及装置
CN201611005197.3 2016-11-11

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WO2018086629A1 true WO2018086629A1 (fr) 2018-05-17

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CN106513924B (zh) * 2016-11-11 2019-01-11 深圳市瑞凌实业股份有限公司 双丝电弧焊接方法及装置
CN114951921B (zh) * 2022-06-09 2024-03-08 斯图加特航空自动化（青岛）有限公司 一种煤机刮板输送机中部槽厚板双丝窄间隙gmaw焊接装置

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CN103341681A (zh) * 2013-06-26 2013-10-09 哈尔滨工业大学 多态双丝电弧焊接装置及焊接方法
CN103521885A (zh) * 2013-09-25 2014-01-22 北京工业大学 双丝间接电弧交替旁路的焊接方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117206645A (zh) * 2023-11-09 2023-12-12 珠海东方重工股份有限公司 一种双丝高速焊接机器人
CN117206645B (zh) * 2023-11-09 2024-01-23 珠海东方重工股份有限公司 一种双丝高速焊接机器人

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