[go: up one dir, main page]

WO2012111414A1 - Dispositif de soudage à l'arc sous protection gazeuse à électrodes multiples automatique - Google Patents

Dispositif de soudage à l'arc sous protection gazeuse à électrodes multiples automatique Download PDF

Info

Publication number
WO2012111414A1
WO2012111414A1 PCT/JP2012/051977 JP2012051977W WO2012111414A1 WO 2012111414 A1 WO2012111414 A1 WO 2012111414A1 JP 2012051977 W JP2012051977 W JP 2012051977W WO 2012111414 A1 WO2012111414 A1 WO 2012111414A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
intermediate electrode
current value
current
shielded arc
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.)
Ceased
Application number
PCT/JP2012/051977
Other languages
English (en)
Japanese (ja)
Inventor
英市 佐藤
正浩 本間
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to KR1020137021532A priority Critical patent/KR101533178B1/ko
Priority to CN201280007520.4A priority patent/CN103347638B/zh
Publication of WO2012111414A1 publication Critical patent/WO2012111414A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • B23K9/16—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
    • 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
    • B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
    • B23K9/073—Stabilising the arc
    • 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
    • B23K9/095—Monitoring or automatic control of welding parameters
    • B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
    • 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
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting

Definitions

  • the present invention relates to a multi-electrode gas shielded arc automatic welding apparatus, and more particularly to a multi-electrode capable of preventing the occurrence of welding defects while including a preceding gas shielded arc welding electrode, a subsequent gas shielded arc welding electrode, and an intermediate electrode.
  • the present invention relates to a gas shielded arc automatic welding apparatus.
  • Patent Document 1 discloses a three-electrode arc welding control method. In this technique, three electrodes are arranged in series on a weld line, and a puddle generated by the arc of the leading electrode and the trailing electrode is controlled by the arc of the intermediate electrode.
  • Patent Document 1 since the technique disclosed in Patent Document 1 connects the leading electrode, the trailing electrode, and the intermediate electrode to the positive electrode of the power source, the arc blow at the welding point is caused by three currents flowing in the same direction. There is a risk that magnetic field interference caused by parallel currents such as
  • Patent Document 1 since the technique disclosed in Patent Document 1 is affected not only by the arc of the leading electrode and the trailing electrode but also by the arc of the intermediate electrode, the arc of the intermediate electrode is affected by the magnetic field interference. The probability of the controlled puddle becoming unstable was high, and as a result, there was a high possibility of causing weld defects.
  • Patent Document 2 discloses a welding method in which a leading electrode and a trailing electrode are connected to a positive electrode of a power source and an intermediate electrode is connected to a negative electrode of a power source as a multi-electrode gas shield arc automatic welding method. It is disclosed. By adopting such a configuration, magnetic field interference due to the arc of the leading electrode and the trailing electrode can be reduced by the current flowing through the intermediate electrode (current opposite to the current flowing through the leading electrode and the trailing electrode). It was.
  • Patent Document 2 does not melt the intermediate electrode by arc, but melts it by stable Joule heat, and therefore, compared with the technique disclosed in Patent Document 1, could be controlled stably.
  • the intermediate electrode feed rate is instantaneously reduced or stopped, so that the melting amount of the intermediate electrode due to Joule heat May become excessive with respect to the feeding amount of the intermediate electrode.
  • the shape of the puddle may change due to some disturbance such as arc deflection caused by arc blow, and the relative positional relationship with the intermediate electrode may be different from the steady state.
  • the tip of the intermediate electrode is separated from the molten pool, and an arc is generated between the tip of the intermediate electrode and the molten pool.
  • the puddle became unstable by the said arc, and as a result, there existed a problem that a favorable weld part was not obtained.
  • Patent Document 2 is controlled so that the feed amount of the intermediate electrode is slightly smaller than the melt amount of the intermediate electrode due to Joule heat in order to avoid the penetration defect of the intermediate electrode into the molten pool.
  • control naturally increases the possibility that the tip of the intermediate electrode will be separated from the molten pool, and as in the case described above, an arc generated between the tip of the intermediate electrode and the molten pool. As a result, the puddle becomes unstable and a good weld cannot be obtained.
  • the feeding speed of the intermediate electrode is set to a constant speed and a constant current is supplied to the intermediate electrode from a DC power source is adopted.
  • the possibility of occurrence remained. Therefore, it is necessary to adjust the intermediate electrode feeding speed as appropriate so that a person can confirm the welding situation and continue stable welding. Therefore, it cannot be said that the conventional technique is a technique that is well suited to the automation of gas shielded arc welding.
  • the present invention has been made in view of the above-mentioned problems, and its problem is to prevent the occurrence of welding defects due to destabilization of the puddle and to achieve multi-electrode gas shielded arc suitable for automation of gas shielded arc welding. It is to provide an automatic welding apparatus.
  • a multi-electrode gas shielded arc automatic welding apparatus includes a preceding gas shielded arc welding electrode and a subsequent gas shielded arc welding electrode, and further includes the preceding gas shielded arc welding electrode.
  • An intermediate electrode between the first gas shielded arc welding electrode and the subsequent gas shielded arc welding electrode, and the preceding gas shielded arc welding electrode, the subsequent gas shielded arc welding electrode, and the intermediate electrode are consumable electrodes.
  • a gas shielded arc automatic welding apparatus wherein each of the preceding gas shielded arc welding electrode and the succeeding gas shielded arc welding electrode fed at a constant speed is connected to the positive electrode and the material to be welded to the negative electrode And two DC power sources having constant voltage characteristics and the material to be welded are connected to a positive electrode,
  • a DC power supply for an intermediate electrode having an electrode connected to the negative electrode and having a constant current characteristic
  • a voltage detection means for detecting a voltage between the intermediate electrode and the material to be welded
  • a voltage detected by the voltage detection means Is input and a current value signal is input from the outside, and when the short circuit determination unit determines that a short circuit is detected, a current value signal indicating a first current value is When output to the DC power supply for the intermediate electrode as a value setting signal and the short-circuit determining means determines that it is not a short-circuit, a current value signal indicating a second current value smaller than the first current value is used as the current value setting signal
  • the multi-electrode gas shielded arc automatic welding apparatus is configured such that when the intermediate electrode is in a short-circuited state, the short-circuit determining means determines the intermediate electrode from the voltage value detected / input by the voltage detecting means. As a result, the current value signal indicating the first current value is selected by the intermediate electrode current setting means, and the DC power supply for the intermediate electrode supplies the current of the first current value to the intermediate electrode. To control.
  • the short-circuit determining means short-circuits the intermediate electrode from the voltage value detected / input by the voltage detecting means.
  • the current value signal indicating the second current value is selected by the intermediate electrode current setting means so that the intermediate electrode DC power supply supplies the current of the second current value to the intermediate electrode. Control. Therefore, the multi-electrode gas shielded arc automatic welding apparatus according to the present invention has a normal current value (first current value) with respect to the intermediate electrode when the intermediate electrode is not short-circuited and an arc is generated.
  • the melting amount of the intermediate electrode can be reduced compared to the melting amount at the time of short circuit. Therefore, according to the multi-electrode gas shielded arc automatic welding apparatus according to the present invention, even if the intermediate electrode is not short-circuited and an arc is generated, the intermediate electrode can be short-circuited instantaneously.
  • the intermediate electrode of the multi-electrode gas shielded arc automatic welding apparatus controls the current supplied to the intermediate electrode as described above, despite being connected to a DC power source having constant current characteristics. Therefore, the short-circuit state can be maintained, so that the intermediate electrode can be supplied at a constant speed. Therefore, unlike the consumable electrode connected to a DC power source having a conventional constant current characteristic, there is no need to control the shift of the feeding speed, so there is no need to provide complicated control means for controlling the feeding speed.
  • the multi-electrode gas shielded arc automatic welding apparatus is connected in parallel to the DC power source for the intermediate electrode, the welding material is connected to the positive electrode, and the intermediate electrode is connected to the negative electrode. It is preferable to provide an auxiliary DC power supply for intermediate electrodes having high impedance characteristics.
  • the multi-electrode gas shielded arc automatic welding apparatus is substantially used to set the current at the second current value to the intermediate electrode when the intermediate electrode is not short-circuited and an arc is generated. Even when the output is stopped or when the output is stopped, the voltage detecting means detects a high voltage indicated by the intermediate electrode auxiliary DC power supply. As a result, the short circuit determination means can determine whether or not there is a short circuit. Therefore, the multi-electrode gas shielded arc automatic welding apparatus according to the present invention has a second smaller than the normal current value (first current value) with respect to the intermediate electrode when the intermediate electrode is not short-circuited. Even when the output is substantially stopped or the output is stopped in order to obtain the current of the current value, the melting amount of the intermediate electrode can be reduced with respect to the feeding amount of the intermediate electrode.
  • middle electrodes of the multi-electrode gas shield arc automatic welding apparatus which concerns on this invention has an output characteristic that a short circuit current is 1 A or less. Since the intermediate electrode auxiliary DC power supply has the above-described output characteristics, substantially no current is supplied from the intermediate electrode auxiliary DC power supply to the intermediate electrode. Therefore, the current is supplied to the intermediate electrode only from the intermediate electrode DC power source appropriately controlled by the intermediate electrode current setting means. That is, the current supplied to the intermediate electrode can be appropriately controlled.
  • the multi-electrode gas shielded arc automatic welding apparatus includes the voltage detection means, the short-circuit determination means, the intermediate electrode current setting means, the speed control means, and the intermediate electrode DC power source. Are preferably provided in one housing.
  • the multi-electrode gas shielded arc automatic welding apparatus according to the present invention is preferably applied to horizontal fillet welding.
  • the effects of the invention can be obtained more appropriately.
  • the multi-electrode gas shielded arc automatic welding apparatus when the intermediate electrode is not short-circuited and an arc is generated, a normal current value (first current value) is applied to the intermediate electrode. Therefore, even when the intermediate electrode is not short-circuited and an arc is generated, the intermediate electrode can be instantaneously short-circuited. As a result, the puddle can be stabilized by the short-circuited intermediate electrode, and a good weld can be obtained.
  • the intermediate electrode when the intermediate electrode is not short-circuited, the intermediate electrode is smaller than the normal current value (first current value). Even if the output is substantially stopped in order to obtain the current of the second current value, or even when the output is stopped, it is possible to determine whether or not the output is short-circuited, so that the intermediate electrode is not short-circuited. Even so, the intermediate electrode can be short-circuited instantaneously. As a result, the puddle can be stabilized by the short-circuited intermediate electrode, and a good weld can be obtained.
  • the multi-electrode gas shielded arc automatic welding apparatus according to the present invention, it is necessary to provide a complicated control means for controlling the feeding speed such as a consumable electrode connected to a DC power source having a conventional constant current characteristic. As a result, the cost of the entire apparatus can be reduced.
  • a multi-electrode gas shielded arc automatic welding device that requires multiple electrodes to be installed in a narrow space, it is no longer necessary to install a feeding device near the tip of the intermediate electrode, ensuring flexibility in device design. can do.
  • the multi-electrode gas shielded arc automatic welding apparatus according to the present invention, it is not necessary to separately provide devices for voltage detection means, short-circuit determination means, intermediate electrode current setting means, and speed control means.
  • the cost required for installing the apparatus can be reduced, and the reliability of the apparatus can be increased.
  • the intermediate electrode is short-circuited. Even if it does not exist, since the intermediate electrode can be short-circuited instantaneously, it can be suitably applied to large current welding and high-speed welding. Moreover, since the multi-electrode gas shielded arc automatic welding apparatus according to the present invention can be automatically controlled so that the intermediate electrode is short-circuited, it can be suitably applied to gas shielded arc automatic welding.
  • the multi-electrode gas shielded arc automatic welding apparatus 100 is an apparatus that performs welding using a plurality of electrodes while shielding a welding portion from air with gas. Note that the multi-electrode gas shielded arc automatic welding apparatus 100 is suitably applied to horizontal fillet welding as shown in FIG.
  • the multi-electrode gas shielded arc automatic welding apparatus 100 is arranged so as to be along the corners (welding points) of the lower plate 1 and the standing plate 2 that are materials to be welded, and the leading electrode 3, the trailing electrode 4, and Three electrodes of the intermediate electrode 5 are arranged as a set, and welding is performed while moving in the direction of the arrow in FIG.
  • the multi-electrode gas shielded arc automatic welding apparatus 100 has two sets of leading electrodes 3 and 3 and trailing electrodes sandwiching the standing plate 2 so that the corners on both sides of the lower plate 1 and the standing plate 2 can be welded simultaneously. 4, 4 and the intermediate electrodes 5, 5 may be arranged so as to face each other, and two sets of electrodes may be moved simultaneously. Further, two sets of leading electrodes 3 and 3, trailing electrodes 4 and 4, and intermediate electrodes 5 and 5 are attached to each standing plate 2 so that the lower plate 1 and the plurality of standing plates 2 and 2 can be welded simultaneously. And two or more sets of electrodes may be moved simultaneously.
  • the multi-electrode gas shielded arc automatic welding apparatus 100 includes a preceding gas shielded arc welding electrode 3 (hereinafter, appropriately referred to as a leading electrode 3) and a trailing gas shielded arc welding electrode 4 (hereinafter, As appropriate, the trailing electrode 4), the intermediate electrode 5, the DC power source L connected to the leading electrode 3, the DC power source T connected to the trailing electrode 4, and the intermediate electrode connected to the intermediate electrode 5 DC power supply M.
  • the leading electrode 3 and the trailing electrode 4 generate an arc at the tip of each electrode, and form a molten metal 8 (a molten pool 8) at a welding location between the lower plate 1 and the standing plate 2 that are materials to be welded. (See FIG. 2).
  • the intermediate electrode 5 is inserted into the puddle 10 of the molten metal 8 to prevent the occurrence of magnetic field interference such as arc blow and stabilize the puddle 10 (see FIG. 2).
  • the molten metal 8 generated by the leading electrode 3 and the trailing electrode 4 is solidified to become a weld metal 7, and the weld metal 7 welds the lower plate 1 and the standing plate 2.
  • the weld slag 9 is formed on the surface of the weld metal 7.
  • the leading electrode 3, the trailing electrode 4, and the intermediate electrode 5 are consumable electrodes, and are preferably composed of flux-cored wires. By using the flux-cored wire, the flux stabilizes the arc, so that a good weld can be obtained.
  • the components, diameters, distances between the electrodes, installation angles, etc. of the flux-cored wires constituting each electrode are not particularly limited, and may be performed under the conditions disclosed in Japanese Patent Application Laid-Open No. 2004-261839. .
  • the leading electrode 3, the trailing electrode 4, and the intermediate electrode 5 are supplied to the welding location with the feeding speed controlled at a constant speed.
  • the DC power supplies L and T are power supplies that supply current to the leading electrode 3 or the trailing electrode 4.
  • the leading electrode 3 is connected to the positive electrode, and the material to be welded (the lower plate 1 or the standing plate 2) is connected to the negative electrode.
  • the trailing electrode 4 is connected to the positive electrode, and the material to be welded (the lower plate 1 or the standing plate 2) is connected to the negative electrode.
  • the DC power supply L and the DC power supply T have constant voltage characteristics. The power supply with constant voltage characteristics means that even if the feed rate of the consumable electrode that is fed at a constant speed is changed due to some disturbance and the arc voltage changes.
  • the value of the current supplied from the DC power source L and the DC power source T to the leading electrode 3 and the trailing electrode 4 is not particularly limited.
  • the current supplied to the leading electrode 3 is 250 A or more,
  • the current supplied to the electrode 4 may be 200 A or more.
  • the intermediate electrode DC power source M is a power source having a constant current characteristic while a material to be welded (lower plate 1 or standing plate 2) is connected to the positive electrode and the intermediate electrode 5 is connected to the negative electrode.
  • the constant current characteristic is a characteristic in which the current hardly changes even when the load voltage increases, except when the current is intentionally controlled.
  • the intermediate electrode DC power supply M receives power from the three-phase AC power supply 11, and includes a rectifier 12, a smoothing capacitor 13, an inverter 14, a transformer 15, a rectifier 16, and a reactor. 17, a current detection unit 24, an error amplifier 25, and an output control circuit 26.
  • the three-phase AC power supply 11 supplies a three-phase AC.
  • the rectifier 12 rectifies (converts) the three-phase alternating current supplied from the three-phase alternating current power supply 11 into direct current.
  • the smoothing capacitor 13 smoothes the direct current rectified by the rectifier 12, that is, smoothes the ripple (wave) included in the direct current.
  • the current detection means 24 detects the current flowing through the intermediate electrode 5 and the material to be welded (the lower plate 1 or the standing plate 2), and outputs a current detection signal indicating the detected value of the current to the error amplifier 25.
  • the error amplifier 25 indicates the current detection signal input from the current detection unit 24 and the current value setting signal indicating the first current value I1 input from the intermediate electrode current setting unit 20 or the second current value I2. An error from the current value setting signal is amplified and output to the output control circuit 26 as a current error amplification signal.
  • the output control circuit 26 is a circuit that outputs a drive signal to the inverter 14 in accordance with the current error amplification signal input from the error amplifier 25.
  • the inverter 14 converts the direct current smoothed by the smoothing capacitor 13 into alternating current, and varies the current supplied to the intermediate electrode 5 in accordance with a drive signal from the output control circuit 26.
  • the transformer 15 transforms the alternating current output from the inverter 14.
  • the rectifier 16 rectifies (converts) the alternating current transformed by the transformer 15 into direct current.
  • the reactor 17 smoothes the direct current rectified by the rectifier 16, that is, flattens the ripple contained in the direct current. Then, the current smoothed by the reactor 17 is supplied to the intermediate electrode 5.
  • the voltage detection means 18 is a means for detecting the voltage between the intermediate electrode 5 and the material to be welded (the lower plate 1 or the standing plate 2). Then, the voltage detection unit 18 outputs the detected voltage signal to the short circuit determination unit 19.
  • the short circuit determination unit 19 is a unit that determines whether or not the voltage signal input from the voltage detection unit 18 exceeds a predetermined value. Then, the short-circuit determining unit 19 outputs the result to the intermediate electrode current setting unit 20 (current setting selection circuit 23).
  • the predetermined value is a threshold value for distinguishing between a voltage value in a state where the intermediate electrode 5 is short-circuited and a state where the intermediate electrode 5 is not short-circuited and an arc is generated or a no-load voltage value. is there.
  • the predetermined value includes a voltage value in a state where the intermediate electrode 5 is short-circuited (a voltage value between the intermediate electrode 5 and the material to be welded) and a state where the arc is generated without the intermediate electrode 5 being short-circuited.
  • a voltage value of no load a voltage value between the intermediate electrode 5 and the material to be welded
  • it is a value between the two voltage values, and is preferably 10 to 15 V, for example.
  • the short circuit determination means 19 may be configured to allow a predetermined value to be input from the outside.
  • any short-circuit determining means having a known short-circuit determining method may be used.
  • the predetermined value has two threshold values, that is, a threshold value for short-circuiting from a non-short-circuit state and a threshold value for not short-circuiting from a short-circuit state. Further, since the voltage value in a state where the intermediate electrode 5 is short-circuited also changes with the current flowing through the intermediate electrode, the threshold value may be changed according to the flowing current.
  • the voltage signal input from the voltage detection means 18 is passed through a plurality of filter circuits having different cut-off frequencies, and a combination of a plurality of voltage signals from which noise components are removed and a logic for comparing with a plurality of predetermined values, thereby determining a short circuit. Even when the distance between the means 19 and the electrode is long and it is difficult to distinguish whether it is a short circuit due to noise, it can be determined immediately.
  • the intermediate electrode current setting means 20 is a means for setting a current to be supplied from the intermediate electrode DC power supply M to the intermediate electrode 5 based on the result input from the short circuit determination means 19.
  • the intermediate electrode current setting means 20 includes a first current setting circuit 21, a second current setting circuit 22, and a current setting selection circuit 23, as shown in FIG.
  • the first current setting circuit 21 is a circuit in which a current value signal indicating the first current value I1 is set.
  • the second current setting circuit 22 is a circuit in which a current value signal indicating the second current value I2 is set.
  • the first current setting circuit 21 and the second current setting circuit 22 output a current value signal indicating the first current value I1 or a current value signal indicating the second current value I2 to the current setting selection circuit 23.
  • the first current setting circuit 21 may be configured to be able to input the first current value I1 from the outside.
  • the second current setting circuit 22 may be configured to be able to input the second current value I2 from the outside.
  • the first current value I1 is a value such that the melting amount of the intermediate electrode 5 due to Joule heat is equal to the feeding amount of the intermediate electrode 5 (the melting speed and the feeding speed are the same speed), or the intermediate electrode 5 In order to avoid a rushing defect into the molten pool 8, the feed amount of the intermediate electrode 5 is slightly smaller than the melt amount of the intermediate electrode 5 due to Joule heat. Therefore, the first current value I1 may be calculated from the component, diameter, feed amount (or feed speed), etc. of the intermediate electrode 5, or may be obtained by a prior experiment. For example, the first current value I1 is 50 to 150A.
  • the second current value I2 is a current value smaller than the first current value I1. For example, a current value of 15 A or less is preferable.
  • the current setting selection circuit 23 receives a current value signal indicating the first current value I 1 input from the first current setting circuit 21 or input from the second current setting circuit 22. This is a circuit that outputs one of the current value signals indicating the second current value I2 to the error amplifier 25 of the DC power source M for intermediate electrodes as a current value setting signal.
  • the current setting selection circuit 23 is input from the first current setting circuit 21.
  • a current value signal indicating the first current value I1 is output to the error amplifier 25 as a current value setting signal.
  • the current setting selection circuit 23 receives from the second current setting circuit 22.
  • the input current value signal indicating the second current value I2 is output to the error amplifier 25 as a current value setting signal.
  • the first current value I1 and the second current value I2 may be directly input to the current setting selection circuit 23 from the outside. In this case, the first current setting circuit 21 and the second current setting circuit 22 are not necessary.
  • the electrode feeding means 27 is a means for feeding the intermediate electrode 5 to the welding location at a constant speed.
  • the electrode feeding means 27 includes an electrode feeding motor 30 and an electrode feeding roller 31 as shown in FIG.
  • the electrode feed motor 30 feeds the intermediate electrode 5 to a predetermined position on the surface of the material to be welded via the electrode feed roller 31.
  • the electrode feeding roller 31 may be configured by two rollers arranged so as to sandwich the intermediate electrode 5 therebetween.
  • the speed control means 32 is a means for controlling the intermediate electrode 5 at a constant speed. And as shown in FIG. 3, the electrode feed speed setting device 28 and the electrode feed motor control circuit 29 are provided.
  • the electrode feed speed setting device 28 outputs a feed speed signal indicating a preset electrode feed speed to the electrode feed motor control circuit 29.
  • the electrode feed speed setting unit 28 can input the feed speed from the outside.
  • the electrode feed motor control circuit 29 is a circuit that controls the electrode feed motor 30 based on the feed speed signal input from the electrode feed speed setter 28.
  • the electrode feeding speed is not particularly limited, and is preferably 1 to 3 m / min.
  • the multi-electrode gas shielded arc automatic welding apparatus 100 is connected in parallel to the DC power source M for the intermediate electrode, and the material to be welded (lower plate 1 or standing plate 2). May be connected to the positive electrode, the intermediate electrode 5 is connected to the negative electrode, and may further include an intermediate electrode auxiliary DC power source 33 having high impedance characteristics.
  • the intermediate electrode auxiliary DC power source 33 having high impedance characteristics is a power source provided for the purpose of detecting the voltage between the intermediate electrode 5 and the material to be welded (the lower plate 1 or the standing plate 2). Is a power supply having a very small current supply capability that does not supply a current that melts the intermediate electrode 5. Further, the high impedance characteristic is a characteristic that has a high impedance that allows only a very small current to flow even when the output circuit is short-circuited.
  • the intermediate electrode auxiliary DC power supply 33 preferably has output characteristics such that the short-circuit current is 1 A or less. Since almost no current is supplied from the intermediate electrode auxiliary DC power source 33 to the intermediate electrode 5, current is supplied from only the intermediate electrode DC power source M to the intermediate electrode 5. That is, the current supplied to the intermediate electrode 5 can be appropriately controlled.
  • the intermediate electrode 5 is set to a current having a second current value. Even when the output of the DC power source M for the intermediate electrode is substantially stopped or the output is stopped, the voltage detection means 18 does not support the intermediate electrode auxiliary DC. A high voltage indicated by the power supply 33 is detected. As a result, the short-circuit determination means 19 does not short-circuit the voltage when the above-described state occurs in the same manner as when the intermediate electrode is not short-circuited and an arc is generated or a no-load voltage is generated. Judge. Therefore, the voltage of the auxiliary DC power supply 33 for the intermediate electrode exceeds the voltage value (voltage value between the intermediate electrode 5 and the material to be welded) when the intermediate electrode 5 is short-circuited, for example, 15 V or more Is preferable.
  • the current setting selection circuit 23 is based on the result input from the short circuit determination means 19, or the current value signal indicating the first current value I1 input from the first current setting circuit 21 or the second current setting circuit 22. Is output to the error amplifier 25 as a current value setting signal.
  • the current setting selection circuit 23 is input from the first current setting circuit 21.
  • a current value signal indicating the first current value I1 is output to the error amplifier 25 as a current value setting signal.
  • the current setting selection circuit 23 receives the second input from the second current setting circuit 22.
  • a current value signal indicating the current value I2 is output to the error amplifier 25 as a current value setting signal.
  • the second current value I2 may be the same value as the second current value according to the first embodiment, but may be 0A. That is, the supply of current from the intermediate electrode DC power source M to the intermediate electrode 5 may be stopped. Since the multi-electrode gas shielded arc automatic welding apparatus 100 according to the second embodiment includes the intermediate electrode auxiliary DC power supply 33, the supply of current from the intermediate electrode DC power supply M to the intermediate electrode 5 is stopped. However, the detection voltage is supplied to the intermediate electrode 5 from the intermediate electrode auxiliary DC power supply 33. About another structure, since it is the same as the multi-electrode gas shield arc automatic welding apparatus 100 which concerns on 1st Embodiment, description is abbreviate
  • the multi-electrode gas shielded arc automatic welding apparatus 100 according to the third embodiment is configured such that the intermediate electrode electrode DC power supply device m detects the voltage between the intermediate electrode 5 and the material to be welded.
  • the detection means 18 When the detection means 18, the voltage detected by the voltage detection means 18 are input, and the short-circuit determination means 19 that determines whether or not the short-circuit is detected, and the short-circuit determination means 19 determine that the short-circuit, the current that indicates the first current value I1
  • the intermediate electrode 5 may be a configuration in which the speed control means 32 that feeds 5 at a constant speed and the DC power supply M for the intermediate electrode having constant current characteristics are combined in one housing.
  • the voltage detection means 18 detects the voltage between the material to be welded (the lower plate 1 or the standing plate 2) and the intermediate electrode 5 and outputs the detected voltage signal to the short-circuit determination means 19. Then, the short circuit determination unit 19 determines whether or not there is a short circuit from the voltage signal detected and input by the voltage detection unit 18, and outputs the determination result to the intermediate electrode current setting unit 20. Next, when the result of determining that the short-circuit determining unit 19 is short-circuited is input, the intermediate electrode current setting unit 20 uses the current value signal indicating the first current value I1 as a current value setting signal.
  • the intermediate electrode current setting unit 20 uses the current value signal indicating the second current value I2 as the current value setting signal. Output to DC power supply M.
  • the intermediate electrode DC power supply M is controlled so that the current of the current value setting signal output from the intermediate electrode current setting means 20 is supplied to the intermediate electrode 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

Un dispositif de soudage à l'arc sous protection gazeuse à électrodes multiples automatique permettant d'empêcher l'apparition d'un défaut de soudure provoqué par un bain de fusion instable et adapté au soudage à l'arc sous protection gazeuse automatique comprend : un moyen de détection de tension (18) destiné à détecter la tension entre une électrode intermédiaire (5) et un matériau (1) devant être soudé ; un moyen de détermination de court-circuit (19) destiné à recevoir la tension détectée par le moyen de détection de tension (18) et à déterminer si oui ou non un court-circuit se produit ; un moyen de définition de courant d'électrode intermédiaire (20) destiné à recevoir un signal de valeur de courant provenant de l'extérieur et à, lorsque le moyen de détermination de court-circuit (19) détermine qu'un court-circuit se produit, transmettre le signal de valeur de courant indiquant une première valeur de courant (I1) à une alimentation en puissance en courant continu (M) pour une électrode intermédiaire comme signal de définition de valeur de courant et, lorsque le moyen de détermination de court-circuit (19) détermine qu'un court-circuit ne se produit pas, transmettre le signal de valeur de courant indiquant une seconde valeur de courant (I2) inférieure à la première valeur de courant (I1) à l'alimentation en puissance en courant continu (M) pour l'électrode intermédiaire comme signal de définition de valeur de courant ; un moyen de commande de vitesse (32) ; et un moyen d'alimentation en électrode (27).
PCT/JP2012/051977 2011-02-16 2012-01-30 Dispositif de soudage à l'arc sous protection gazeuse à électrodes multiples automatique Ceased WO2012111414A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020137021532A KR101533178B1 (ko) 2011-02-16 2012-01-30 다전극 가스 실드 아크 자동 용접 장치
CN201280007520.4A CN103347638B (zh) 2011-02-16 2012-01-30 多电极气体保护电弧自动焊接装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011030519A JP5634911B2 (ja) 2011-02-16 2011-02-16 多電極ガスシールドアーク自動溶接装置
JP2011-030519 2011-02-16

Publications (1)

Publication Number Publication Date
WO2012111414A1 true WO2012111414A1 (fr) 2012-08-23

Family

ID=46672351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/051977 Ceased WO2012111414A1 (fr) 2011-02-16 2012-01-30 Dispositif de soudage à l'arc sous protection gazeuse à électrodes multiples automatique

Country Status (4)

Country Link
JP (1) JP5634911B2 (fr)
KR (1) KR101533178B1 (fr)
CN (1) CN103347638B (fr)
WO (1) WO2012111414A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10040096B2 (en) 2015-07-17 2018-08-07 Caterpillar Inc. Abrasion resistant material tandem welding
DE102024117162A1 (de) * 2024-06-18 2025-12-18 Carl Cloos Schweißtechnik Gesellschaft mit beschränkter Haftung Metall-Schutzgaslichtbogenschweißverfahren und Anordnung zur Durchführung des Verfahrens

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103286420B (zh) * 2013-05-30 2015-06-03 唐山松下产业机器有限公司 一种电弧焊机及电弧焊接短路判定方法
JP5974984B2 (ja) * 2013-06-07 2016-08-23 株式会社安川電機 アーク溶接装置、アーク溶接システム及びアーク溶接方法
CN105081537A (zh) * 2014-05-08 2015-11-25 株式会社神户制钢所 四电极单面单层埋弧焊接方法
JP7265308B2 (ja) * 2019-08-30 2023-04-26 株式会社ダイヘン 溶接装置
EP3789150A1 (fr) * 2019-09-04 2021-03-10 FRONIUS INTERNATIONAL GmbH Method et dispositif pour conduire un procédé de soudage multiple

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000176641A (ja) * 1998-12-14 2000-06-27 Daihen Corp Ｔｉｇ溶接装置
JP2004268123A (ja) * 2003-03-11 2004-09-30 Toshiba Plant Systems & Services Corp 溶接用電源装置
JP2008055509A (ja) * 2006-08-01 2008-03-13 Kobe Steel Ltd 多電極ガスシールドアーク溶接方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3117287B2 (ja) * 1992-06-11 2000-12-11 三菱重工業株式会社 消耗電極式アーク溶接方法
JP4749555B2 (ja) * 2001-01-19 2011-08-17 株式会社ダイヘン ３電極アーク溶接制御方法
JP3759114B2 (ja) * 2003-02-28 2006-03-22 株式会社神戸製鋼所 多電極ガスシールドアーク溶接方法
CN100589914C (zh) * 2006-08-01 2010-02-17 株式会社神户制钢所 多电极气体保护电弧焊方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000176641A (ja) * 1998-12-14 2000-06-27 Daihen Corp Ｔｉｇ溶接装置
JP2004268123A (ja) * 2003-03-11 2004-09-30 Toshiba Plant Systems & Services Corp 溶接用電源装置
JP2008055509A (ja) * 2006-08-01 2008-03-13 Kobe Steel Ltd 多電極ガスシールドアーク溶接方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10040096B2 (en) 2015-07-17 2018-08-07 Caterpillar Inc. Abrasion resistant material tandem welding
DE102024117162A1 (de) * 2024-06-18 2025-12-18 Carl Cloos Schweißtechnik Gesellschaft mit beschränkter Haftung Metall-Schutzgaslichtbogenschweißverfahren und Anordnung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
CN103347638B (zh) 2016-01-20
KR101533178B1 (ko) 2015-07-01
JP2012166249A (ja) 2012-09-06
JP5634911B2 (ja) 2014-12-03
KR20130125806A (ko) 2013-11-19
CN103347638A (zh) 2013-10-09

Similar Documents

Publication Publication Date Title
JP5634911B2 (ja) 多電極ガスシールドアーク自動溶接装置
CN103003020B (zh) 短弧焊接系统
US11980977B2 (en) Systems, methods, and apparatus to control weld current in a preheating system
CN102448651A (zh) 焊接方法及焊接装置
CN103974799A (zh) 电弧焊接控制方法及电弧焊接装置
JP2009195952A (ja) 消耗電極アーク溶接の短絡判別方法
CN103003019B (zh) 短弧焊接系统
TW201422354A (zh) 非自耗電極焊接系統以及其焊接方法
JP4500489B2 (ja) 溶接方法及び溶接装置
JP2022185998A (ja) アーク溶接電源
JP6054184B2 (ja) アーク溶接用電源装置及びアーク溶接用電源装置の出力電圧監視方法
JP2009045662A (ja) 溶接電源
JP7429598B2 (ja) アーク溶接電源
JP2024126893A (ja) 多層盛り溶接方法
JP2024053876A (ja) 多層盛り溶接方法
JP2005224812A (ja) アーク溶接装置及びアーク溶接方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12747241

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20137021532

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12747241

Country of ref document: EP

Kind code of ref document: A1