WO2010023709A1 - Appareil d’alimentation pour machine à souder et machine à souder - Google Patents

Appareil d’alimentation pour machine à souder et machine à souder Download PDF

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Publication number
WO2010023709A1
WO2010023709A1 PCT/JP2008/002312 JP2008002312W WO2010023709A1 WO 2010023709 A1 WO2010023709 A1 WO 2010023709A1 JP 2008002312 W JP2008002312 W JP 2008002312W WO 2010023709 A1 WO2010023709 A1 WO 2010023709A1
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WO
WIPO (PCT)
Prior art keywords
power supply
welding
voltage
welding machine
conducting semiconductor
Prior art date
Application number
PCT/JP2008/002312
Other languages
English (en)
Japanese (ja)
Inventor
志賀雅人
北原忠幸
神子諭
小島直人
福田志郎
Original Assignee
株式会社MERSTech
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 株式会社MERSTech filed Critical 株式会社MERSTech
Priority to PCT/JP2008/002312 priority Critical patent/WO2010023709A1/fr
Publication of WO2010023709A1 publication Critical patent/WO2010023709A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B23K9/1043—Power supply characterised by the electric circuit
    • B23K9/1056—Power supply characterised by the electric circuit by using digital means

Definitions

  • the present invention relates to a power supply device for a welding machine and a welding machine.
  • This induction heating power supply device is for supplying a high frequency alternating pulse current to an induction coil for induction heating of an object to be heated, and a DC power source and a smoothing unit for smoothing DC power from the DC power source.
  • a bridge circuit configured by bridge-connecting four reverse conducting semiconductor switches composed of a reverse parallel circuit of a coil for a self-extinguishing element and a diode, and connected between the DC terminals of the bridge circuit, A capacitor for accumulating regenerative magnetic energy of the circuit when the switch is shut off and a control means for controlling on / off of the reverse conducting semiconductor switch are provided.
  • the control means simultaneously turns on / off pairs located on the diagonal line among the reverse conducting semiconductor switches in the cycle of the alternating pulse current supplied to the induction coil, and the two pairs are not simultaneously turned on.
  • the operation is controlled so that the frequency of the generated alternating pulse current is lower than the resonance frequency determined by the inductance of the induction coil and the capacitance of the capacitor.
  • the resonance condition can be maintained regardless of the pulse frequency, and the magnetic energy of the circuit can be regenerated and reused, and the alternating coil can be continuously applied to the induction coil by charging the capacitor from the DC power source via the smoothing coil. Supplying current. JP 2008-92745 A
  • an arc welding machine used for arc welding that uses arc discharge for welding is known.
  • arc welding when aluminum or the like is used as a base material, an oxide film having a high melting point is formed on the surface of the base material during welding. If an oxide film is formed on the surface of the base material, the base material is not melted uniformly, and bead defects such as undulations and grooves may occur. Therefore, in arc welding, it is necessary to remove an oxide film generated during welding.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a power supply device for a welding machine capable of switching between alternating current and direct current with a simpler configuration, and a welding machine including the power supply device for the welding machine. On offer.
  • an aspect of the present invention is a power supply device for a welder, and the power supply device for a welder is connected between a DC power supply, a welding electrode, and an object to be welded, and is output from the DC power supply.
  • a DC / AC conversion switch for converting the generated DC voltage into an AC voltage, a controller for controlling the DC / AC conversion switch, and a coil for causing resonance with the alternating pulse current, and the DC / AC conversion switch includes at least 2 Two reverse conducting semiconductor switches, and a capacitor for accumulating the magnetic energy of the circuit and regenerating it to the welding electrode and the work piece when the current is interrupted, and the control unit controls the switching frequency of the DC / AC conversion switch Thus, the DC voltage output from the DC power source is converted into an AC voltage.
  • Another aspect of the present invention is a welding machine, and the welding machine includes the welding machine power supply apparatus according to the above-described aspect and a welding electrode connected to the welding machine power supply apparatus. To do.
  • the present invention it is possible to provide a welding machine power supply device capable of switching between alternating current and direct current with a simpler configuration, and a welding machine equipped with the welding machine power supply device.
  • FIGS. 2A, 2B, and 2C are diagrams for explaining the operation of MERS. It is a figure for demonstrating supply of the electric power from DC power supply. It is a figure which shows the other aspect of MERS. It is a figure which shows the other aspect of MERS. It is a schematic block diagram of a welding machine.
  • SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 Reverse conducting semiconductor switch 1 Welding machine power supply device, 2 DC power supply, 3, 31, 32 Smoothing coil, 4 DC AC power converter, 5 Resonance Coil, 10, 10a, 10b Magnetic energy regenerative switch (MERS), 12, 13, 14, 15, 16 capacitor, 20 control unit, 30 welding rod, 40 base material, 50 ammeter, 100 welding machine.
  • MERS Magnetic energy regenerative switch
  • FIG. 1 is a circuit block diagram illustrating a configuration of a power supply device for a welding machine according to the present embodiment.
  • a power supply device 1 for a welding machine includes a DC power supply 2 and a smoothing coil 3 for smoothing DC power from the DC power supply 2.
  • the welding machine power supply device 1 includes a DC / AC power conversion unit 4 that converts an AC voltage and a DC voltage supplied to the resonance coil 5.
  • the electric resistance R of arc discharge connected to the welding machine power supply device 1 is illustrated for explaining the welding machine power supply device 1.
  • the electric resistance R includes an electric resistance component included in the resonance coil 5.
  • the DC / AC power conversion unit 4 includes a magnetic energy regenerative switch (MERS) (hereinafter referred to as MERS) 10 as a DC / AC conversion switch, and a control unit 20 that controls switching of the MERS 10.
  • MERS magnetic energy regenerative switch
  • the MERS 10 is a magnetic energy regenerative switch that can control currents in both forward and reverse directions and can regenerate magnetic energy to the load side without loss.
  • the MERS 10 includes a bridge circuit composed of four reverse conducting semiconductor switches SW1, SW2, SW3, and SW4, and an energy storage capacitor 12 that absorbs magnetic energy of a current flowing through the circuit when the bridge circuit is cut off. Prepare.
  • a reverse conducting semiconductor switch SW1 and a reverse conducting semiconductor switch SW4 are connected in series, a reverse conducting semiconductor switch SW2 and a reverse conducting semiconductor switch SW3 are connected in series, and they are connected in parallel. Is formed.
  • the reverse conducting semiconductor switches SW1 to SW4 are composed of an anti-parallel circuit of a self-extinguishing element and a diode.
  • a self-extinguishing element for example, a power MOSFET, IGBT or the like can be used.
  • the capacitor 12 is at the connection point between the DC terminal DC (P) at the connection point between the reverse conduction type semiconductor switch SW1 and the reverse conduction type semiconductor switch SW2 and between the reverse conduction type semiconductor switch SW3 and the reverse conduction type semiconductor switch SW4. It is connected to a direct current terminal DC (N).
  • a DC power source 2 and a smoothing coil 3 are connected in series to the DC terminals DC (P) and DC (N). Further, there is resonance between the AC terminal at the connection point between the reverse conduction semiconductor switch SW1 and the reverse conduction semiconductor switch SW4 and the AC terminal at the connection point between the reverse conduction semiconductor switch SW2 and the reverse conduction semiconductor switch SW3. Coils 5 for use are connected in series.
  • the control unit 20 sends a control signal to the gates of the reverse conducting semiconductor switches SW1 to SW4 to control the switching of the reverse conducting semiconductor switches SW1 to SW4 of the MERS 10. Specifically, the ON / OFF operation of the first pair composed of the reverse conducting semiconductor switches SW1 and SW3 located on the diagonal line in the bridge circuit of the MERS 10 and the second pair comprising the reverse conducting semiconductor switches SW2 and SW4. A control signal is transmitted to each gate so that when one is ON, the other is OFF and ON / OFF switching is performed simultaneously.
  • 2A, 2 ⁇ / b> B, and 2 ⁇ / b> C are diagrams for explaining the operation of the MERS 10.
  • illustration of the DC power supply 2, the smoothing coil 3, and the control unit 20 is omitted.
  • the reverse conducting semiconductor switches SW1 and SW3 are turned on while the voltage is charged in the capacitor 12, the charge of the capacitor 12 is discharged to the resonance coil 5 as shown in FIG. Thus, the current flows through a path passing through the reverse conducting semiconductor switch SW 1 -the resonance coil 5 -reverse conducting semiconductor switch SW 3 -the capacitor 12.
  • the current of the capacitor 12 stops and the current continues to flow through the diodes of the other reverse conducting semiconductor switches. For example, when the reverse conducting semiconductor switch SW1 is turned off, a current flows through the diode of the reverse conducting semiconductor switch SW4.
  • the reverse conducting semiconductor switches SW2 and SW4 are turned on while the voltage is charged in the capacitor 12, the direction of the current flowing through the resonance coil 5 is opposite to the arrow in the figure. Therefore, the current flowing through the resonance coil 5 depending on which of the first pair consisting of the reverse conduction type semiconductor switches SW1 and SW3 and the second pair consisting of the reverse conduction type semiconductor switches SW2 and SW4 is turned ON. Direction can be selected.
  • the capacitance of the capacitor 12 is small, and the resonance frequency with the inductance L of the resonance coil 5 is higher than the pulse frequency. Therefore, the MERS 10 is zero voltage switching and zero current switching. That is, by using the MERS 10, the magnetic energy of the resonance coil 5 can be regenerated to alternately generate bipolar current pulses, that is, alternating pulse currents in the resonance coil 5. Therefore, the power supply device 1 for the welding machine can supply an AC voltage to the resonance coil 5 by controlling the MERS 10 as described above by the control unit 20, and is always a reverse conducting semiconductor switch. By turning on SW1 and SW3 and turning off reverse conducting semiconductor switches SW2 and SW4, the DC voltage from the DC power supply 2 can be supplied to the resonance coil 5 as it is.
  • the AC frequency can be arbitrarily adjusted below the resonance frequency by adjusting the switching frequency of the reverse conducting semiconductor switches SW1 to SW4.
  • FIG. 3 is a diagram for explaining the supply of electric power from the DC power supply 2.
  • illustration of the control part 20 is abbreviate
  • the power supply from the DC power source 2 to the capacitor 12 is performed through the smoothing coil 3 having a large inductance.
  • the current from the DC power supply 2 becomes a DC with less ripples by the smoothing coil 3, and becomes smaller than the oscillating pulse load current.
  • the above-described welding machine power supply device 1 has a configuration in which the MERS 10 includes a bridge circuit formed by four reverse conducting semiconductor switches SW1 to SW4 and a capacitor 12 connected between the DC terminals of the bridge circuit.
  • the MERS 10 may have the following configuration.
  • FIG. 4 and 5 are diagrams showing other modes of the MERS 10. Since the configuration other than the mode of MERS 10 is the same as the configuration illustrated in FIG. 1, the same configuration is denoted by the same reference numeral and description thereof is omitted.
  • the MERS 10a shown in FIG. 4 has two reverse-conducting semiconductor switches, two diodes, and 2 for the full-bridge type MERS 10 composed of the four reverse-conducting semiconductor switches SW1 to SW4 and the capacitor 12 described above. It is a vertical half-bridge type composed of two capacitors. More specifically, the vertical half-bridge MERS 10a is provided in parallel with two reverse conducting semiconductor switches SW5 and SW6 connected in series and the two reverse conducting semiconductor switches SW5 and SW6. Two capacitors 13 and 14 connected in series, and two diodes D1 and D2 connected in parallel with each of the two capacitors 13 and 14 are included.
  • the MERS 10b shown in FIG. 5 is a horizontal half-bridge type, and includes two reverse conducting semiconductor switches and two capacitors. More specifically, the horizontal half-bridge MERS 10b includes a reverse conducting semiconductor switch SW7 provided on the first path connecting the power source and the ground, and a reverse conducting semiconductor switch provided on the second path. SW8 and capacitors 15 and 16 connected in parallel with the reverse conducting semiconductor switches SW7 and SW8, respectively.
  • a smoothing coil 31 is provided in series with the reverse conducting semiconductor switch SW7 on the first path, and a smoothing coil 32 is provided in series with the reverse conducting semiconductor switch SW8 on the second path. Is provided. The smoothing coils 31 and 32 are not included in the MERS 10b.
  • FIG. 6 is a schematic configuration diagram of the welding machine.
  • an arc welder that performs welding using arc discharge will be described as an example.
  • the welding machine 100 of the present embodiment includes a DC power source 2, a DC AC power conversion unit 4, and welding as a welding electrode connected to the DC power source 2 via the DC AC power conversion unit 4. And rod 30.
  • the welding machine 100 applies a negative voltage to the welding rod 30, and further applies a positive voltage to the base material 40 as an object to be welded connected to the DC power source 2 via the MERS 10 of the DC / AC power converter 4. By applying, an arc is generated between them, and the base material 40 is welded by the heat.
  • a resonance coil 5 is connected between the MERS 10 and the welding rod 30.
  • the welding machine 100 of this embodiment is provided with the ammeter 50 as a welding state monitoring part.
  • the direct current alternating current power conversion part 4 in FIG. 6 provides the coil 5 for resonance in the direct current alternating current power conversion part 4 shown in FIG.
  • the welding rod 30 and the base material 40 correspond to the electric resistance R of arc discharge of the welding machine power supply device 1 shown in FIG.
  • the welding rod 30 is made of a material that is not easily deformed at high temperatures, has high heat and electrical conductivity, is difficult to alloy with the base material 40, and is not easily oxidized in the atmosphere. , Tungsten alloy or the like.
  • Base material 40 is made of any metal such as copper, copper alloy, iron, iron alloy, stainless steel, aluminum, aluminum alloy, and magnesium alloy.
  • the base material 40 is usually welded by applying a DC voltage to the welding rod 30 and the base material 40.
  • the base material 40 is made of a material that easily oxidizes, such as aluminum, an aluminum alloy, or a magnesium alloy, an oxide film having a high melting point is formed on the surface of the base material 40 during welding.
  • an oxide film is formed on the surface of the base material 40, the base material 40 does not melt evenly, and bead defects such as undulations and grooves occur.
  • the welding machine 100 monitors the welding state, and when the state where the oxide film is formed on the surface of the base material 40 and the welding is difficult is detected, the welding machine 100 is supplied from the DC power source 2 in the DC / AC power conversion unit 4.
  • the DC voltage is converted into an AC voltage and supplied to the welding rod 30 and the base material 40. Then, the oxide film formed on the surface of the base material 40 is removed by the cleaning action of the AC voltage.
  • an ammeter 50 is provided in the DC / AC power conversion unit 4 and the current flowing through the welding rod 30 and the base material 40 is detected by the ammeter 50. The detection result by the ammeter 50 is transmitted from the ammeter 50 to the control unit 20.
  • the control unit 20 When the control unit 20 detects that the current value received from the ammeter 50 is equal to or lower than a predetermined current value, the control unit 20 controls the MERS 10 to convert the DC voltage supplied from the DC power source 2 into an AC voltage. To do. Thereby, an AC voltage is supplied to the welding rod 30 and the base material 40, and the oxide film formed on the surface of the base material 40 is removed by the cleaning action of the AC.
  • the “predetermined current value” is, for example, a lower limit current value required at least for welding of the base material 40, and is appropriately set according to the material, thickness, and the like of the base material 40. The lower limit current value can be obtained experimentally.
  • the welding machine 100 is provided with a setting switch for setting a current value to be output, and the user can appropriately set the output current value according to the material of the base material 40 and the like.
  • the lower limit current value is defined as a value obtained by subtracting a predetermined ratio from the set current value set by the user.
  • the control unit 20 determines that it is difficult to weld the base material 40 due to the oxide film, and switches the DC voltage to the AC voltage.
  • the control unit 20 includes a storage unit (not shown), a table in which the set current value and the lower limit current value are associated with each other is stored in the storage unit, and the control unit 20 is stored in the storage unit. DC / AC conversion is executed with reference to the table.
  • control unit 20 When the control unit 20 detects that the current value received from the ammeter 50 exceeds a predetermined current value after converting the DC voltage supplied from the DC power source 2 to an AC voltage, the control unit 20 stops the switching control of the MERS 10. As a result, a DC voltage is supplied again to the welding rod 30 and the base material 40.
  • the welding machine 100 which concerns on this embodiment, conversion control of direct current alternating current is possible only by incorporating the direct current alternating current power conversion part 4 provided with MERS10 and the control part 20 which have a simple structure. Therefore, it is possible to switch between alternating current and direct current with a simpler configuration.
  • the welding machine 100 includes a welding state monitoring unit such as an ammeter 50, which enables automatic DC / AC conversion. Therefore, DC / AC conversion at a more appropriate timing according to the welding state is possible, and the welding efficiency and the welding accuracy can be further improved.
  • the DC / AC conversion is not only configured to be performed according to the monitoring result of the welding state monitoring unit, but a program that preliminarily defines the DC / AC conversion timing is stored in the storage unit and the program is executed. In this case, DC / AC conversion may be performed. According to this, the welding machine 100 can be made a simpler configuration.
  • the conversion timing when the DC / AC conversion timing is defined in advance for example, a conversion timing for periodically switching between a DC voltage and an AC voltage is conceivable. In particular, if the time for supplying the DC voltage is longer than the time for supplying the AC voltage, the welding efficiency can be increased.
  • the frequency of the AC voltage can be adjusted in the welding machine 100 according to the present embodiment, the frequency of the AC voltage converted from the DC voltage may be changed. According to this, the following effects can be obtained.
  • the frequency when the frequency is lowered, the output waveform approaches a rectangular wave, and the period during which the voltage including zero voltage is low decreases, so that the time for cooling the welding rod 30 is shortened, and the effect of improving the welding efficiency is obtained. It is done.
  • the frequency is increased, the concentration of the arc to be emitted can be increased. Therefore, particularly when the base material 40 is a material having high thermal conductivity such as aluminum or copper, the welding efficiency is improved. The effect that it can be improved is obtained.
  • a setting switch for setting the frequency of the AC voltage is provided in the welding machine 100, and the user can set the frequency appropriately according to the properties of the base material 40 including the material of the base material 40. it can.
  • the control unit 20 converts the DC voltage to an AC voltage having a frequency set by the setting switch.
  • the welding machine power supply device 1 and the welding machine 100 are connected between the DC power supply 2, the welding rod 30 and the base material 40.
  • MERS10 which converts the output DC voltage into AC voltage
  • the control part 20 which controls MERS10 are provided.
  • the control part 20 is converting the DC voltage output from the direct-current power supply 2 into the alternating voltage by controlling switching of MERS10. Therefore, alternating current and direct current can be switched with a simpler configuration.
  • the welding machine 100 includes a welding state monitoring unit that monitors the welding state of the base material 40.
  • the control part 20 is converting the DC voltage output from the DC power supply 2 into AC voltage according to the monitoring result of the welding condition monitoring part. Therefore, DC / AC conversion at a more appropriate timing according to the welding state is possible, and the welding efficiency and the welding accuracy can be further improved.
  • control unit 20 adjusts the frequency of the AC voltage by adjusting the switching of the MERS 10 according to the properties of the base material 40. Therefore, the welding efficiency can be further improved.
  • the present invention is not limited to the above-described embodiment, and various modifications such as design changes can be added based on the knowledge of those skilled in the art.
  • the embodiment to which such a modification is added is also the present embodiment. It can be included in the scope of the invention.
  • the present invention can be used for a welding machine.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Arc Welding Control (AREA)

Abstract

Un appareil d’alimentation pour machine à souder (1) est branché entre une alimentation en courant continu (2), une électrode de soudure (30) et un matériau de base (40). Ledit appareil comprend : un MERS (10) qui transforme en tension alternative la tension continue émise par l’alimentation en courant continu (2) ; une partie de commande (20) qui commande le MERS (10) ; et une bobine (5) qui entre en résonance avec un courant alternatif impulsionnel. Le MERS (10) se compose d’au moins deux commutateurs à semi-conducteur passant en sens inverse ainsi que d’un condensateur (12). Lorsque le courant est coupé, ce dernier stocke l’énergie magnétique de circuit afin de régénérer l’électrode de soudure et le matériau de base. La partie de commande (20) sert à commander la fréquence de commutation du MERS (10), ce qui permet de transformer en tension alternative la tension continue émise par l’alimentation en courant continu (2).
PCT/JP2008/002312 2008-08-26 2008-08-26 Appareil d’alimentation pour machine à souder et machine à souder WO2010023709A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/002312 WO2010023709A1 (fr) 2008-08-26 2008-08-26 Appareil d’alimentation pour machine à souder et machine à souder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/002312 WO2010023709A1 (fr) 2008-08-26 2008-08-26 Appareil d’alimentation pour machine à souder et machine à souder

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WO2010023709A1 true WO2010023709A1 (fr) 2010-03-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016093340A1 (fr) * 2014-12-12 2016-06-16 新日鐵住金株式会社 Dispositif de source d'alimentation, système d'assemblage, et procédé de traitement de conducteur
JP2017042800A (ja) * 2015-08-27 2017-03-02 新日鐵住金株式会社 抵抗スポット溶接用電源装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122671A (en) * 1980-03-05 1981-09-26 Hitachi Ltd High-frequency pulse tig welding method
JPH04279279A (ja) * 1991-03-04 1992-10-05 Matsushita Electric Ind Co Ltd 交流ｔｉｇ溶接機
JP2001197748A (ja) * 2000-01-14 2001-07-19 Matsushita Electric Works Ltd 電源装置
JP2004082163A (ja) * 2002-08-27 2004-03-18 Sansha Electric Mfg Co Ltd 溶接方法及び溶接用電源装置
JP2008092745A (ja) * 2006-10-05 2008-04-17 Tokyo Institute Of Technology 誘導加熱用電源装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122671A (en) * 1980-03-05 1981-09-26 Hitachi Ltd High-frequency pulse tig welding method
JPH04279279A (ja) * 1991-03-04 1992-10-05 Matsushita Electric Ind Co Ltd 交流ｔｉｇ溶接機
JP2001197748A (ja) * 2000-01-14 2001-07-19 Matsushita Electric Works Ltd 電源装置
JP2004082163A (ja) * 2002-08-27 2004-03-18 Sansha Electric Mfg Co Ltd 溶接方法及び溶接用電源装置
JP2008092745A (ja) * 2006-10-05 2008-04-17 Tokyo Institute Of Technology 誘導加熱用電源装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016093340A1 (fr) * 2014-12-12 2016-06-16 新日鐵住金株式会社 Dispositif de source d'alimentation, système d'assemblage, et procédé de traitement de conducteur
KR20170084295A (ko) * 2014-12-12 2017-07-19 신닛테츠스미킨 카부시키카이샤 전원 장치, 접합 시스템 및 통전 가공 방법
CN107148736A (zh) * 2014-12-12 2017-09-08 新日铁住金株式会社 电源装置、接合系统及通电加工方法
JPWO2016093340A1 (ja) * 2014-12-12 2017-11-02 新日鐵住金株式会社 電源装置、接合システム、及び、通電加工方法
CN107148736B (zh) * 2014-12-12 2019-06-07 新日铁住金株式会社 电源装置、接合系统及通电加工方法
KR102010163B1 (ko) * 2014-12-12 2019-08-12 닛폰세이테츠 가부시키가이샤 전원 장치, 접합 시스템 및 통전 가공 방법
US10603743B2 (en) 2014-12-12 2020-03-31 Nippon Steel Corporation Power supply device, joining system, and electric processing method
JP2017042800A (ja) * 2015-08-27 2017-03-02 新日鐵住金株式会社 抵抗スポット溶接用電源装置

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