WO2018186098A1 - Système de soudage à l'arc métallique blindé et dispositif d'alimentation électrique de soudage pour soudage à l'arc métallique blindé - Google Patents

Système de soudage à l'arc métallique blindé et dispositif d'alimentation électrique de soudage pour soudage à l'arc métallique blindé Download PDF

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Publication number
WO2018186098A1
WO2018186098A1 PCT/JP2018/008772 JP2018008772W WO2018186098A1 WO 2018186098 A1 WO2018186098 A1 WO 2018186098A1 JP 2018008772 W JP2018008772 W JP 2018008772W WO 2018186098 A1 WO2018186098 A1 WO 2018186098A1
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circuit
arc welding
voltage
output
current
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PCT/JP2018/008772
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English (en)
Japanese (ja)
Inventor
雄一 宮島
陽彦 真鍋
賢人 高田
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株式会社ダイヘン
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Publication of WO2018186098A1 publication Critical patent/WO2018186098A1/fr

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    • 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

Definitions

  • the present disclosure relates to a coated arc welding system and a welding power supply device for coated arc welding.
  • Covered arc welding is known as welding suitable for outdoor work.
  • an arc is generated between a covered arc welding rod and a workpiece, and welding is performed by the heat of the arc.
  • covered arc welding unlike carbon dioxide arc welding, there is no need to spray gas. Therefore, welding work can be performed with a simple device. Also, welding work can be performed outdoors where gas is scattered by the wind.
  • FIG. 7 is a diagram showing an example of a coated arc welding system according to a comparative example (note that the system shown in FIG. 7 is not necessarily publicly known).
  • the coated arc welding system shown in FIG. 7 includes a coated arc welding rod B, a welding rod holder C for holding the coated arc welding rod B and energizing a welding current, and a coated arc welding rod via the welding rod holder C.
  • a welding power supply device A100 that supplies electric power to B.
  • the welding power supply device A100 includes a transformer 300 that transforms AC power, inputs AC power from the commercial power source D to the primary side of the transformer 300, and outputs AC power after transformation from the secondary side of the transformer 300. .
  • One output terminal a of the welding power source device A100 is connected to the workpiece W by a cable, and the other output terminal b is connected to the welding rod holder C by a cable.
  • the welding power source device A100 generates an arc between the tip of the coated arc welding rod B and the workpiece W, and supplies electric power.
  • the transformer 300 is increased in size, which hinders the welding power supply device A100 from being reduced in size and weight.
  • an object thereof is to provide a more suitable coated arc welding system.
  • an object of the present disclosure is to provide a coated arc welding system that suppresses arc breakage when the polarity of the output current changes and that can reduce the size and weight of the welding power supply device.
  • a coated arc welding system contains a covering arc welding rod and the welding power supply device which supplies electric power to the said covering arc welding rod.
  • the welding power supply device includes a rectifier circuit, a DC reactor, an inverter circuit, and a voltage superimposing circuit.
  • the rectifier circuit rectifies AC power.
  • the DC reactor smoothes the output of the rectifier circuit.
  • the inverter circuit converts DC power output from the DC reactor into AC power and outputs the AC power to the coated arc welding rod.
  • the voltage superimposing circuit superimposes a re-ignition voltage on the output to the coated arc welding rod.
  • the voltage superimposing circuit superimposes the re-ignition voltage when the polarity of the output current of the inverter circuit is switched.
  • a welding power supply device for covering arc welding.
  • the welding power supply device includes a rectifier circuit, a DC reactor, an inverter circuit, and a voltage superimposing circuit.
  • the rectifier circuit rectifies AC power.
  • the DC reactor smoothes the output of the rectifier circuit.
  • the inverter circuit converts DC power output from the DC reactor into AC power and outputs the AC power to the coated arc welding rod.
  • the voltage superimposing circuit superimposes a re-ignition voltage on the output to the coated arc welding rod.
  • the voltage superimposing circuit superimposes the re-ignition voltage when the polarity of the output current of the inverter circuit is switched.
  • FIG. 1 is a diagram showing an overall configuration of a coated arc welding system according to the first embodiment.
  • the coated arc welding system includes a welding power source device A ⁇ b> 1, a coated arc welding rod B, and a welding rod holder C.
  • the welding rod holder C is for an operator to hold and weld, and holds the covered arc welding rod B, and supplies the alternating current input from the welding power source device A1 to the covered arc welding rod B.
  • the welding power source device A1 converts AC power input from the commercial power source D and outputs it from the output terminals a and b.
  • One output terminal a is connected to the workpiece W by a cable.
  • the other output terminal b is connected to the welding rod holder C by a cable.
  • the welding power supply device A1 generates an arc between the tip of the covered arc welding rod B and the workpiece W to supply electric power. Welding is performed by the heat of the arc.
  • the welding power supply device A1 includes a rectifying / smoothing circuit 1, an inverter circuit 2, a transformer 3, a rectifying circuit 4, a DC reactor 5, a voltage superimposing circuit 6, an inverter circuit 7, a control circuit 8, a current sensor 91, and a voltage sensor 92. .
  • the rectifying / smoothing circuit 1 converts AC power input from the commercial power source D into DC power and outputs it.
  • the rectifying / smoothing circuit 1 includes a rectifying circuit for rectifying an alternating current and a smoothing capacitor for smoothing.
  • the inverter circuit 2 is, for example, a single-phase full-bridge type PWM control inverter and includes four switching elements.
  • the inverter circuit 2 converts the DC power input from the rectifying / smoothing circuit 1 into high-frequency power by switching the switching element according to the drive signal input from the control circuit 8, and outputs the high-frequency power.
  • the inverter circuit 2 only needs to convert DC power into AC power, and may be, for example, a half-bridge type or an inverter circuit having another configuration.
  • the transformer 3 transforms the high-frequency voltage output from the inverter circuit 2 and outputs it to the rectifier circuit 4. Since the transformer 3 is a high frequency transformer, it is smaller and lighter than a commercial frequency transformer.
  • the rectifier circuit 4 is, for example, a full-wave rectifier circuit, and rectifies high-frequency power input from the transformer 3 and outputs the rectified circuit to the inverter circuit 7.
  • the rectifier circuit 4 only needs to rectify high-frequency power, and may be a half-wave rectifier circuit, for example.
  • the direct current reactor 5 smoothes the direct current that the rectifier circuit 4 outputs to the inverter circuit 7.
  • the inverter circuit 7 is, for example, a single-phase full-bridge type PWM control inverter and includes four switching elements.
  • the inverter circuit 7 converts the DC power input from the rectifier circuit 4 into AC power and outputs it by switching the switching element according to the switching drive signal input from the control circuit 8.
  • the inverter circuit 7 only needs to convert DC power into AC power, and may be, for example, a half-bridge type or an inverter circuit having another configuration.
  • the switching drive signal corresponds to an example of “drive signal”.
  • the voltage superimposing circuit 6 is disposed between the rectifying circuit 4 and the inverter circuit 7, and when the polarity of the output current of the inverter circuit 7 is switched, a high voltage is applied between the output terminals a and b of the welding power source device A1. Superimpose.
  • the high voltage is for improving the re-ignitability at the time of polarity switching, and may be referred to as “re-ignition voltage” below.
  • the voltage superimposing circuit 6 includes a diode 61, a re-ignition capacitor 62, a charging circuit 63 and a discharging circuit 64.
  • the re-ignition capacitor 62 is a capacitor having a predetermined capacitance or more, and is charged with a high voltage (re-ignition voltage) to be superimposed on the output of the welding power source device A1.
  • the re-ignition capacitor 62 is connected in parallel to the rectifier circuit 4.
  • the re-ignition capacitor 62 is charged by the charging circuit 63 and discharged by the discharging circuit 64.
  • the charging circuit 63 is a circuit for charging the re-ignition capacitor 62 with a re-ignition voltage, and is connected to the re-ignition capacitor 62 in parallel.
  • FIG. 2A is a diagram illustrating an example of the charging circuit 63.
  • the charging circuit 63 includes an insulated forward converter.
  • the charging circuit 63 includes a drive circuit 63a for driving the isolated forward converter.
  • the drive circuit 63a outputs a pulse signal for driving the switching element 63b based on a charge circuit drive signal input from a charge control unit 86 described later.
  • the drive circuit 63a outputs a predetermined pulse signal to the switching element 63b while the charging circuit drive signal is on (for example, a high level signal).
  • the re-ignition capacitor 62 is charged.
  • the drive circuit 63a does not output a pulse signal while the charging circuit drive signal is off (for example, a low level signal). Therefore, charging of the re-ignition capacitor 62 is stopped. That is, the charging circuit 63 switches between a state where the re-ignition capacitor 62 is charged and a state where it is not charged based on the charging circuit drive signal.
  • the charge control unit 86 may directly input a pulse signal as a charge circuit drive signal to the switching element 63b. Further, the configuration of the charging circuit 63 is not limited.
  • the discharge circuit 64 discharges the re-ignition voltage charged in the re-ignition capacitor 62 and is connected to the re-ignition capacitor 62 in series.
  • FIG. 2B is a diagram illustrating an example of the discharge circuit 64.
  • the discharge circuit 64 includes a switching element 64a and a current limiting resistor 64b.
  • the switching element 64a is an IGBT (Insulated Gate Bipolar Transistor: an insulated gate bipolar transistor).
  • the switching element 64a may be a bipolar transistor, a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), or the like.
  • the switching element 64 a and the current limiting resistor 64 b are connected in series and are connected in series to the re-ignition capacitor 62.
  • the emitter terminal of the switching element 64a is connected to the positive terminal of the rectifier circuit 4, and the collector terminal of the switching element 64a is connected to one terminal of the current limiting resistor 64b.
  • the current limiting resistor 64b may be connected to the emitter terminal side of the switching element 64a.
  • a discharge circuit drive signal is input to the gate terminal of the switching element 64a from a discharge control unit 85 described later.
  • the switching element 64a is turned on while the discharge circuit drive signal is on (for example, a high level signal). As a result, the re-ignition voltage charged in the re-ignition capacitor 62 is discharged and is superimposed on the output voltage of the rectifier circuit 4 via the current limiting resistor 64b.
  • the switching element 64a is turned off while the discharge circuit drive signal is off (for example, a low level signal). Thereby, the discharge of the re-ignition voltage is stopped. That is, the discharge circuit 64 switches between a state where the re-ignition capacitor 62 is discharged and a state where it is not discharged based on the discharge circuit drive signal.
  • the configuration of the discharge circuit 64 is not limited.
  • the diode 61 is connected in parallel to the discharge circuit 64, the anode terminal is connected to the positive terminal of the input of the inverter circuit 7, and the cathode terminal is connected to the re-ignition capacitor 62.
  • the diode 61 causes the re-ignition capacitor 62 to absorb the transient voltage of the input voltage of the inverter circuit 7.
  • the current sensor 91 detects the output current of the welding power source device A1, and in this embodiment, is disposed on a connection line that connects one output terminal of the inverter circuit 7 and the output terminal a.
  • the current sensor 91 detects an instantaneous value of the output current and inputs it to the control circuit 8. In this embodiment, the case where the current flows from the inverter circuit 7 toward the output terminal a is positive, and the case where the current flows from the output terminal a toward the inverter circuit 7 is negative.
  • the voltage sensor 92 detects the voltage between the terminals of the re-ignition capacitor 62.
  • the voltage sensor 92 detects the voltage between the terminals and inputs it to the control circuit 8.
  • the control circuit 8 is a circuit for controlling the welding power source device A1, and is realized by, for example, a microcomputer.
  • the control circuit 8 receives the instantaneous value of the output current from the current sensor 91 and receives the voltage across the re-ignition capacitor 62 from the voltage sensor 92. Then, drive signals are output to the inverter circuit 7, the charging circuit 63, and the discharging circuit 64, respectively.
  • the control circuit 8 includes a current control unit 81, a current target setting unit 82, a polarity switching control unit 83, a waveform target setting unit 84, a discharge control unit 85, and a charge control unit 86.
  • the current control unit 81 controls the inverter circuit 2.
  • the current control unit 81 calculates an effective value from the instantaneous value of the output current input from the current sensor 91, and based on the effective value and the effective value target value input from the current target setting unit 82, the inverter circuit 2.
  • a drive signal for controlling the switching element is generated and output to the inverter circuit 2.
  • the polarity switching control unit 83 controls the inverter circuit 7.
  • the polarity switching control unit 83 performs switching for controlling the switching elements of the inverter circuit 7 based on the instantaneous value of the output current input from the current sensor 91 and the current waveform target value input from the waveform target setting unit 84.
  • a drive signal is generated and output to the inverter circuit 7.
  • the current waveform target value corresponds to an example of “control target”.
  • the discharge control unit 85 controls the discharge circuit 64.
  • the discharge control unit 85 generates a discharge circuit drive signal for controlling the discharge circuit 64 based on the instantaneous value of the output current input from the current sensor 91 and the switching drive signal input from the polarity switching control unit 83. Generated and output to the discharge circuit 64.
  • the output current (see FIG. 3B) of the welding power source A1 changes according to the switching drive signal (see FIG. 3A).
  • the output terminal a (workpiece W) is positive when the switch is on
  • the output terminal b (covered arc welding rod B) is negative
  • the output terminal a (workpiece) when off. W) is negative and output terminal b (covered arc welding rod B) is positive.
  • the output current of the welding power source device A1 decreased from when the switching drive signal was switched from on to off (time t1 in FIGS. 3A to 3E) and passed zero (time t2 in FIGS. 3A to 3E) and the polarity changed.
  • the minimum current value is reached (time t3 in FIGS. 3A to 3E).
  • the output current of the welding power source device A1 increases from when the switching drive signal is switched from OFF to ON (time t5 in FIGS. 3A to 3E), passes the zero (time t6 in FIGS. 3A to 3E), and has a polarity.
  • the maximum current value is reached (time t7 in FIGS. 3A to 3E).
  • the discharge controller 85 generates a discharge circuit drive signal so as to be turned on when the polarity of the output current of the welding power supply device A1 changes. Specifically, the discharge controller 85 switches on when the switching drive signal is switched (time t1, t5 in FIGS.
  • the discharge control unit 85 determines that the maximum current value is reached when the instantaneous current value is equal to or greater than the predetermined first threshold value. When the instantaneous current value is equal to or less than the predetermined second threshold, it is determined that the minimum current value has been reached.
  • the charging control unit 86 controls the charging circuit 63.
  • the charge control unit 86 controls the charging circuit 63 based on the instantaneous value of the output current input from the current sensor 91 and the voltage across the terminals of the re-ignition capacitor 62 input from the voltage sensor 92.
  • a circuit drive signal is generated and output to the charging circuit 63.
  • the voltage across the re-ignition capacitor 62 is output when the discharge circuit drive signal (see FIG. 3C) is turned on (time t1 in FIGS. 3A to 3E).
  • the polarity of the current changes (time t2 in FIGS. 3A to 3E)
  • it decreases due to the discharge of the re-ignition capacitor 62.
  • the re-ignition capacitor 62 is charged to a predetermined voltage, it is not necessary to perform further charging.
  • the charging control unit 86 generates a charging circuit drive signal so as to be turned on after the re-ignition capacitor 62 is discharged until the re-ignition capacitor 62 reaches a predetermined voltage. Specifically, the charge controller 86 switches the discharge circuit drive signal to OFF (time t3, t7 in FIGS. 3A to 3E), that is, the instantaneous value of the output current becomes the maximum current value or the minimum current value.
  • the charging circuit generates a pulse signal that is turned on when the voltage is turned on and turned off when the voltage between the terminals of the re-ignition capacitor 62 reaches a predetermined voltage (time t4, t8 in FIGS. 3A to 3E). It outputs as a drive signal (refer FIG. 3D).
  • the arc welding can be performed by causing the coated arc welding rod B to generate an arc between the tip and the workpiece W by the AC power output from the welding power source device A1.
  • the discharge control unit 85 of the welding power supply device A1 generates a discharge circuit drive signal that is turned on when the polarity of the output current of the welding power supply device A1 changes.
  • the discharge circuit 64 receives a discharge circuit drive signal input from the discharge control unit 85. Thereby, the discharge circuit 64 can superimpose the re-ignition voltage charged in the re-ignition capacitor 62 on the output voltage of the rectifier circuit 4 when the polarity of the output current of the welding power supply device A1 changes.
  • the DC reactor 5 can be reduced in size.
  • the transformer 3 is a high frequency transformer, it is smaller and lighter than a commercial frequency transformer. Accordingly, the welding power source device A1 can be reduced in size and weight as compared with the case of the coated arc welding system according to the comparative example.
  • the discharge circuit 64 controls the discharge based on the discharge circuit drive signal input from the discharge control unit 85.
  • the discharge circuit drive signal (see FIG. 3C) is turned on when the switching drive signal (see FIG. 3A) is switched, and is turned off when the output current (see FIG. 3B) reaches the maximum current value or the minimum current value. Switch to Therefore, when the polarity of the output current of the welding power source device A1 changes, the discharge circuit drive signal is always on, so the discharge circuit 64 can appropriately superimpose the re-ignition voltage.
  • the charging circuit 63 controls charging based on the charging circuit drive signal input from the charging control unit 86.
  • the charging circuit drive signal (see FIG. 3D) is turned on when the discharge circuit drive signal (see FIG. 3C) is turned off. Therefore, the charging circuit 63 can start charging immediately after discharging. Thereby, the charge time until the next discharge can be lengthened. Further, the charging circuit drive signal is switched off when the voltage between the terminals of the re-ignition capacitor 62 (see FIG. 3E) becomes a predetermined voltage. Thereby, the charging circuit 63 can suppress charging the re-ignition capacitor 62 more than necessary.
  • the charging control unit 86 generates the charging circuit drive signal based on the instantaneous value of the output current and the voltage between the terminals of the re-ignition capacitor 62 . Absent. As long as the re-ignition capacitor 62 can be charged with the re-ignition voltage by the next discharge timing, the timing of starting and ending charging is not limited. Further, the charging circuit 63 may be continuously charged. In this case, the charging control unit 86 is not necessary, and the drive circuit 63a may continue to output a pulse signal for driving the switching element 63b.
  • the discharge control unit 85 generates the discharge circuit drive signal based on the instantaneous value of the output current and the switching drive signal.
  • the present invention is not limited to this. Since it is sufficient that the re-ignition voltage can be superimposed when the polarity of the output current of the welding power source device A1 changes, the discharge circuit drive signal may be turned on before the polarity is changed and turned off after the polarity is changed. For example, the discharge circuit drive signal may be switched off when a predetermined time has elapsed since the instantaneous value of the output current becomes zero.
  • the discharge control unit 85 receives a current waveform target value from the waveform target setting unit 84 instead of the switching drive signal from the polarity switching control unit 83, and the current waveform target value is When switched, the discharge circuit drive signal may be switched on. In this case as well, the waveform of the discharge circuit drive signal is the same as when switching based on the switching drive signal.
  • the discharge circuit drive signal may be switched on.
  • the waveform of the discharge circuit drive signal is the same as when switching based on the switching drive signal.
  • a first threshold value smaller than the maximum current value and larger than zero and a second threshold value larger than the minimum current value and smaller than zero are set, and the discharge circuit drive signal is set so that the instantaneous value of the output current is the first threshold value and the second threshold value. It may be switched on when entering a range between and off when switching out of the range. Even in this case, the discharge circuit drive signal is turned on before the polarity is changed and turned off after the polarity is changed.
  • the waveform of the output current may be a sine wave.
  • the waveform target setting unit 84 outputs a sine wave signal as the current waveform target value, and the polarity switching control unit 83 outputs the instantaneous value of the output current input from the current sensor 91 and the current waveform target value input from the waveform target setting unit 84. If the switching drive signal is generated based on the above, the waveform of the output current can be a sine wave.
  • the discharge circuit drive signal may be generated based on the instantaneous value of the output current detected by the current sensor 91. For example, a first threshold value that is smaller than the maximum current value and larger than zero and a second threshold value that is larger than the minimum current value and smaller than zero are set, and the discharge circuit drive signal is set as the instantaneous value of the output current as the first threshold value and the second threshold value. It is possible to switch on when entering the range between and to switch off when outside the range. If the waveform of the output current is a sine wave, the generated arc becomes wider, so that the welding mark can be made wider. Moreover, the sound generated from welding power supply device A1 can be suppressed.
  • the present invention is not limited to this.
  • the output terminal a (workpiece W) is positive and the output terminal b (covered arc welding rod B) is negative, so that the output terminal a (workpiece W) is negative and the output terminal b ( It is known that arc breakage is likely to occur when the coated arc welding rod B) switches to the reverse polarity which is positive. Therefore, the re-ignition voltage may be superimposed only when switching from positive polarity to reverse polarity, and the re-ignition voltage may not be superimposed when switching from negative polarity to positive polarity.
  • a modification in this case will be described with reference to FIGS. 5A to 5E. In this modification, only the method of generating the discharge circuit drive signal by the discharge control unit 85 is changed.
  • FIGS. 5A to 5E are time charts showing waveforms of respective signals in the modified example.
  • FIG. 5A shows a switching drive signal generated by the polarity switching control unit 83, which is the same as that shown in FIG. 3A.
  • FIG. 5B shows the output current of the welding power source device A1, which is the same as that shown in FIG. 3B.
  • FIG. 5C shows a discharge circuit drive signal generated by the discharge control unit 85.
  • FIG. 5D shows a charging circuit drive signal generated by the charging control unit 86.
  • FIG. 5E shows the voltage between the terminals of the re-ignition capacitor 62.
  • the discharge control unit 85 generates a discharge circuit drive signal so that it is turned on when the polarity of the output current of the welding power source device A1 changes from positive polarity to reverse polarity. Specifically, the discharge control unit 85 is switched on when the switching drive signal (see FIG. 5A) is switched from on to off (time t1 in FIGS. 5A to 5E), and the output current of the welding power supply device A1 ( When the minimum current value is reached (see FIG. 5B) (time t3 in FIGS. 5A to 5E), a pulse signal that is turned off is generated and output as a discharge circuit drive signal (see FIG. 5C). When the switching drive signal is switched from OFF to ON (time t5 in FIGS. 5A to 5E), and when the output current of the welding power supply device A1 reaches the maximum current value (FIGS. 5A to 5E) At time t7), the discharge circuit drive signal is not switched.
  • the discharge circuit drive signal (see FIG. 5C) generated by the discharge controller 85 is different from the discharge drive signal shown in FIG. 3C
  • the voltage between the terminals of the capacitor 62 (see FIG. 5E) has a waveform different from that shown in FIGS. 3D and 3E.
  • the voltage superimposing circuit 6 may be arranged on the output side of the inverter circuit 7. This case will be described below as a second embodiment.
  • FIG. 6 is a diagram showing an overall configuration of a covered arc welding system according to the second embodiment.
  • the same or similar elements as those in the covered arc welding system (see FIG. 1) according to the first embodiment are denoted by the same reference numerals.
  • the control circuit 8 is illustrated in a simplified manner.
  • the welding power supply device A2 is different from the welding power supply device A1 according to the first embodiment in that the voltage superimposing circuit 6 is arranged on the output side of the inverter circuit 7.
  • the voltage superimposing circuit 6 is disposed on the output side of the inverter circuit 7 and superimposes a re-ignition voltage between the output terminals a and b so as to increase the potential of the output terminal b (covered arc welding rod B). It is configured.
  • the discharge circuit 64 is conductive when the switching drive signal (see FIG. 5A) switches from on to off (time t1 in FIGS. 5A to 5E), and the polarity of the output current (see FIG. 5B) changes.
  • time t2 in FIGS. 5A to 5E the re-ignition capacitor 62 is discharged, and the re-ignition voltage is superimposed between the output terminals a and b.
  • arc breakage is more likely to occur, and since re-ignition voltage can be superimposed when switching from positive polarity to reverse polarity, occurrence of arc breakage can be suppressed.
  • the welding power source device A2 can be reduced in size and weight.
  • arc break is relatively difficult to occur, and when the reverse polarity is switched to the positive polarity, the re-ignition voltage is not superimposed. Therefore, compared with the first embodiment, the current limiting resistance 64b Loss can be reduced. Further, since the time from discharge of the re-ignition voltage to the next discharge becomes longer, it is particularly effective when it takes time to charge the re-ignition voltage.
  • the covering arc welding system and the welding power supply apparatus for covering arc welding according to the present disclosure are not limited to the above-described embodiments.
  • the specific configuration of each part of the coated arc welding system and the welding power supply apparatus for the coated arc welding according to the present disclosure can be modified in various ways.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

La présente invention concerne un système de soudage à l'arc métallique blindé. Le système de soudage à l'arc métallique blindé comprend une tige de soudage à l'arc métallique blindée et un dispositif d'alimentation électrique pour soudage qui fournit de l'électricité à la tige de soudage à l'arc métallique blindé. Le dispositif d'alimentation électrique pour soudage comprend un circuit redresseur, un réacteur à courant continu, un circuit inverseur et un circuit de superposition de tension. Le circuit redresseur redresse le courant alternatif. Le réacteur à courant continu nivelle la sortie du circuit redresseur. Le circuit inverseur convertit la sortie de courant continu délivrée en sortie par le réacteur à courant continu en une sortie de courant alternatif et délivre le résultat à la tige de soudage à l'arc métallique blindé. Le circuit de superposition de tension superpose une tension transitoire de rétablissement sur la sortie à la tige de soudage à l'arc métallique blindé. Le circuit de superposition de tension superpose la tension transitoire de rétablissement lorsque la polarité de la sortie de courant provenant du circuit inverseur commute.
PCT/JP2018/008772 2017-04-04 2018-03-07 Système de soudage à l'arc métallique blindé et dispositif d'alimentation électrique de soudage pour soudage à l'arc métallique blindé WO2018186098A1 (fr)

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JP2017074127A JP6958785B2 (ja) 2017-04-04 2017-04-04 被覆アーク溶接システム、および、被覆アーク溶接用の溶接電源装置
JP2017-074127 2017-04-04

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JPH0237971A (ja) * 1988-07-27 1990-02-07 Matsushita Electric Ind Co Ltd 交流アーク溶接電源
JPH03174974A (ja) * 1989-11-30 1991-07-30 Daihen Corp 交流アーク溶接機
JPH03180276A (ja) * 1989-12-07 1991-08-06 Daihen Corp 交流アーク溶接機
JP2010046692A (ja) * 2008-08-22 2010-03-04 Daihen Corp 交流アーク溶接電源
JP2016144396A (ja) * 2015-02-05 2016-08-08 リンカーン グローバル，インコーポレイテッド 溶接性能を高めるための回路

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