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WO2005099952A1 - Procédé de contrôle du démarrage d’un arc - Google Patents

Procédé de contrôle du démarrage d’un arc Download PDF

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Publication number
WO2005099952A1
WO2005099952A1 PCT/JP2005/003844 JP2005003844W WO2005099952A1 WO 2005099952 A1 WO2005099952 A1 WO 2005099952A1 JP 2005003844 W JP2005003844 W JP 2005003844W WO 2005099952 A1 WO2005099952 A1 WO 2005099952A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
arc
welding wire
control method
wire
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/JP2005/003844
Other languages
English (en)
Japanese (ja)
Inventor
Takahide Hirayama
Seigo Nishikawa
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.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
Yaskawa Electric Manufacturing Co 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 Yaskawa Electric Corp, Yaskawa Electric Manufacturing Co Ltd filed Critical Yaskawa Electric Corp
Publication of WO2005099952A1 publication Critical patent/WO2005099952A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
    • B23K9/067—Starting the arc
    • B23K9/0671—Starting the arc by means of brief contacts between the electrodes

Definitions

  • the present invention relates to a method for controlling arc welding, and more particularly to an arc start control method for consumable electrode type gas shielded arc welding.
  • the start pulse current is as low as several tens of amperes or less, so that the arc can be generated very gently.
  • the workpiece is an aluminum material with a small resistance value, it is suitable for mild steel with a large resistance value, especially if it is a stainless steel, it will be welded at the moment the welding wire contacts the workpiece. Therefore, it was difficult to apply.
  • Patent Document 1 an arc start control method characterized by preventing welding between a welding wire and a workpiece is disclosed (for example, Patent Document 1), and will be described below.
  • FIG. 3 is a timing chart of a conventional touch start type arc start control method.
  • the welding power source feeds the welding wire at the wire feeding speed VI with the output stopped.
  • the welding power source applies the initial current 10 and applies the welding current to the welding wire. Feeding speed Reverse feed at VR.
  • the application of the initial current 10 and the backward feeding of the welding wire are continued until time t4.At time t4, the welding wire is fed forward at a steady speed Vf and the steady welding is performed. Move to state.
  • the conventional arc start control method is characterized in that the welding wire is intermittently fed and the welding output is intermittently performed so that the arc is started without welding the welding wire and the workpiece.
  • Patent Document 1 JP-A-2002-178146
  • the welding output stopping time is shortened, so that the welding wire and the workpiece are easily welded.
  • the present invention has been made in view of such a problem, and an arc start that can reliably generate an arc without a long processing time at the time of arc start or welding of a welding wire. It is an object to provide a control method.
  • the present invention employs the following procedure.
  • the invention according to claim 1 is an arc start control method for consumable electrode type gas shielded arc welding using a welding power source, wherein a welding start command is received, a welding output is started, and a welding wire is fed forward.
  • the welding voltage is limited until the welding wire comes into contact with the workpiece, and the initial voltage after detecting that the welding wire has contacted the workpiece is detected.
  • the method is characterized in that the welding wire is fed backward while feeding an electric current, the arc is confirmed, and after a lapse of a predetermined time, the welding wire is fed forward again.
  • the invention according to claim 2 is characterized in that the limit value of the welding voltage is a minimum value at which contact between the welding wire and the object to be welded can be detected.
  • the invention according to claim 3 is characterized in that the welding power supply is an inverter-type welding power supply.
  • the invention according to claim 4 is characterized in that the welding voltage is limited by limiting a duty ratio of pulse width modulation control in the inverter.
  • FIG. 1 is a block diagram of a welding power source showing an embodiment of the present invention.
  • FIG. 2 is a timing chart of an arc start control showing an embodiment of the present invention.
  • FIG. 1 is an internal block diagram of the arc welding power supply of the present invention.
  • the arc welding power supply 1 is a rectifier circuit for converting AC from an external three-phase power supply 30 to DC, a rectifier for converting AC from the inverter unit 32, the transformer 33, and the transformer 33 again to DC and outputting the DC.
  • a wire feed command calculating means 10 a wire feed control means 11, a welding output command calculating means 12, a welding output control means 13 and a welding output limiting means 20 are provided.
  • the wire feed command calculating means 10 calculates a wire feed command for each welding sequence, and gives a command to the wire feed control means 11.
  • the wire feed control means 11 performs feedback control so that the command and the actual speed match.
  • the welding output command calculating means 12 calculates a current command at the time of constant current control, and calculates a voltage command at the time of constant voltage control, and gives a command to the welding output control means 13.
  • the welding output control means 13 performs feed knock control so that the command and the actual current value and voltage value match.
  • the AC output from the three-phase power supply 30 is converted into DC by the rectifier circuit 31, the switching time is controlled by the inverter unit 32 to obtain a desired welding output, the voltage is reduced through the transformer 33, and then rectified again. It is converted to DC by the circuit 34 and output.
  • the switching time of the inverter section 32 is controlled by the welding output control means 13.
  • the welding output limiting means 20 limits the welding output so that the welding current is 10A-50A or less. Specifically, the voltage of the welding output is limited by setting the upper limit of the duty ratio of the pulse width modulation control. The welding output is low when the ON period ratio (duty ratio) of the switching time is small, and the welding output is large when the ON period ratio (duty ratio) is large! /.
  • the welding output is limited by setting the upper limit of the duty ratio of the inverter unit 32, the welding current flowing at the moment when the welding wire comes into contact with the workpiece is suppressed to 10A-50A or less, and the welding wire is welded to the workpiece.
  • the welding wire can be pulled up smoothly without Thus, generation of spatter can be suppressed and an arc can be easily generated.
  • an inverter-type welding power source is used.
  • the present invention is not limited to this as long as the voltage can be limited.
  • FIG. 2 shows a timing chart of the arc start control method using the arc welding power supply of the present invention.
  • the arc welding power supply 1 outputs the initial voltage Vi and feeds the welding wire at the first wire feed speed VI.
  • the initial voltage Vi output at this time is limited by the welding output limiting means 20 to a minimum value at which contact between the welding wire and the workpiece can be detected.
  • the arc welding power supply 1 applies the initial current 10 and switches the welding wire to the second.
  • the welding output of the arc welding power source 1 is limited to the initial voltage Vi that does not weld the two, so that only welding current of 10A to 50A or less flows.
  • the welding wire can be pulled up smoothly without welding the welding wire to the workpiece, and an arc can be easily generated without spatter.
  • the application of the initial current 10 and the backward feeding of the welding wire are continued until time t4.At time t4, the welding wire is fed forward at a steady speed Vf, and Transition to steady welding state.
  • the present invention is applicable to consumable electrode type gas shielded arc welding.

Landscapes

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

Abstract

Un procédé de contrôle du démarrage d’un arc capable de générer de façon sûre un arc tout en empêchant la prolongation du temps de traitement du démarrage de l’arc ou l’adhérence d’un fil de soudage. Au moment où est reçue une commande de début de soudage, le soudage commence et un fil de soudage est avancé. La tension de soudage est limitée jusqu’à ce que le fil de soudage touche une pièce à souder. Après que le contact entre le fil de soudage et la pièce à souder ait été détecté, un courant initial est fourni et le fil de soudage est retiré. Quand un temps prédéterminé s’est écoulé après que la génération de l’arc ait été confirmée, le fil de soudage est à nouveau avancé.
PCT/JP2005/003844 2004-04-16 2005-03-07 Procédé de contrôle du démarrage d’un arc Ceased WO2005099952A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-121923 2004-04-16
JP2004121923 2004-04-16

Publications (1)

Publication Number Publication Date
WO2005099952A1 true WO2005099952A1 (fr) 2005-10-27

Family

ID=35149837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/003844 Ceased WO2005099952A1 (fr) 2004-04-16 2005-03-07 Procédé de contrôle du démarrage d’un arc

Country Status (1)

Country Link
WO (1) WO2005099952A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935547A1 (fr) * 2006-12-20 2008-06-25 Daihen Corporation Procédé de contrôle de l'allumage de l'arc de soudage à l'arc avec électrode consumable
CN106488823A (zh) * 2014-09-08 2017-03-08 株式会社达谊恒 电弧焊接控制方法
CN107498146A (zh) * 2017-09-15 2017-12-22 唐山松下产业机器有限公司 焊接系统、电弧焊接控制装置及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09108837A (ja) * 1995-10-19 1997-04-28 Osaka Denki Co Ltd パルスアーク溶接方法及びパルスアーク溶接装置
JP2002248572A (ja) * 2001-02-23 2002-09-03 Daihen Corp アークスタート制御方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09108837A (ja) * 1995-10-19 1997-04-28 Osaka Denki Co Ltd パルスアーク溶接方法及びパルスアーク溶接装置
JP2002248572A (ja) * 2001-02-23 2002-09-03 Daihen Corp アークスタート制御方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935547A1 (fr) * 2006-12-20 2008-06-25 Daihen Corporation Procédé de contrôle de l'allumage de l'arc de soudage à l'arc avec électrode consumable
CN106488823A (zh) * 2014-09-08 2017-03-08 株式会社达谊恒 电弧焊接控制方法
CN107498146A (zh) * 2017-09-15 2017-12-22 唐山松下产业机器有限公司 焊接系统、电弧焊接控制装置及方法

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