WO2005099952A1 - Arc start control method - Google Patents

Arc start control method 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
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Prior art keywords
welding
arc
welding wire
control method
wire
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PCT/JP2005/003844
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French (fr)
Japanese (ja)
Inventor
Takahide Hirayama
Seigo Nishikawa
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Kabushiki Kaisha Yaskawa Denki
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Publication of WO2005099952A1 publication Critical patent/WO2005099952A1/en

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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
    • B23K9/067—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.

Abstract

An arc start control method capable of surely generating arc while preventing prolongation of the arc start processing time or adhesion of a welding wire. Upon receiving a welding start command, welding output is started and a welding wire is fed forward. Welding voltage is limited until the welding wire touches an article to be welded. After contact of the welding wire with the article to be welded is detected, an initial current is supplied and the welding wire is retracted. When a predetermined time has elapsed after confirming generation of arc, the welding wire is fed forward again.

Description

明 細 書  Specification
アークスタート制御方法  Arc start control method
技術分野  Technical field
[0001] 本発明は、アーク溶接の制御方法に関し、特に消耗電極式ガスシールドアーク溶 接のアークスタート制御方法に関する。  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.
背景技術  Background art
[0002] 消耗電極式ガスシールドアーク溶接において、アークスタート時のスパッタ発生をな くすため、溶接ワイヤを被溶接物に接触させた後溶接出力を印加しながら溶接ワイヤ を引き上げることでアーク発生させる、タツチスタート方式のアークスタート制御方法 が知られている。  [0002] In consumable electrode type gas shielded arc welding, in order to eliminate generation of spatter at the time of arc start, an arc is generated by bringing a welding wire into contact with a workpiece and then pulling up the welding wire while applying a welding output. A touch start type arc start control method is known.
タツチスタート方式のアークスタートではスタートパルス電流が数十 A以下と低いた め、非常に穏やかにアークを発生できることを特徴としている。しかし、被溶接物が抵 抗値の小さいアルミニウム材の場合には適している力 抵抗値の大きな軟鋼、特に、 ステンレス材の場合には溶接ワイヤと被溶接物が接触した瞬間に溶着してしまうため に、適用することが困難であった。  In the touch-start type arc start, the start pulse current is as low as several tens of amperes or less, so that the arc can be generated very gently. However, if 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.
そこで溶接ワイヤと被溶接物との溶着を防止することを特徴とするアークスタート制 御方法が開示されている (例えば特許文献 1)ので以下に説明する。  Accordingly, 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.
[0003] 従来のタツチスタート方式のアークスタート制御方法について、図を用いて説明す る。図 3は従来のタツチスタート方式のアークスタート制御方法のタイミングチャートで ある。時刻 tOにおいて、溶接電源は出力停止状態のまま、ワイヤ送給速度 VIにて溶 接ワイヤを送給する。 [0003] A conventional touch start type arc start control method will be described with reference to the drawings. FIG. 3 is a timing chart of a conventional touch start type arc start control method. At time tO, the welding power source feeds the welding wire at the wire feeding speed VI with the output stopped.
時刻 ti lにおいて、ワイヤ送給を停止するとともに、無負荷電圧 V0を印加する。こ の時、溶接電圧が短絡判定閾値 Vs以下であるかで、溶接ワイヤと被溶接物が短絡（ 接触）して 、るかどうかを判定する。  At time t1l, the wire feeding is stopped, and the no-load voltage V0 is applied. At this time, it is determined whether or not the welding wire is short-circuited (contact) with the workpiece by determining whether the welding voltage is equal to or less than the short-circuit determination threshold Vs.
時刻 tl2において短絡が検出されない場合、無負荷電圧 V0の出力を停止し再度 ワイヤ送給速度 VIにて溶接ワイヤを送給する。このように、溶接ワイヤと被溶接物が 接触し溶接電圧が短絡判定の閾値以下になるまで、ワイヤ送給と無負荷電圧出力と を複数回繰り返す。 If a short circuit is not detected at time tl2, output of the no-load voltage V0 is stopped, and the welding wire is fed again at the wire feeding speed VI. In this way, until the welding wire comes into contact with the workpiece and the welding voltage falls below the short-circuit judgment threshold, the wire feed and no-load voltage output Is repeated several times.
時刻 t2において、溶接電圧が短絡判定閾値 Vs以下に低下することにより、溶接ヮ ィャと被溶接物が接触したことを検知すると、溶接電源は初期電流 10を印カロしながら 、溶接ワイヤをワイヤ送給速度 VRにて後退送給させる。時刻 t3にてアーク発生を確 認すると時刻 t4まで初期電流 10の通電と溶接ワイヤの後退送給を継続し、時刻 t4に おいて溶接ワイヤを定常速度 Vfにて前進送給するとともに、定常溶接状態に移行す る。  At time t2, when the welding voltage is reduced to the short-circuit determination threshold value Vs or less to detect that the welding wire and the workpiece are in contact, the welding power source applies the initial current 10 and applies the welding current to the welding wire. Feeding speed Reverse feed at VR. When the occurrence of an arc is confirmed at time t3, 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.
このように従来のアークスタート制御方法では、溶接ワイヤを断続的に送給すると共 に断続的に溶接出力することにより、溶接ワイヤと被溶接物を溶着させることなくァー クスタートさせることを特徴として ヽた。  As described above, 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. As
特許文献 1：特開 2002-178146号公報  Patent Document 1: JP-A-2002-178146
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0004] し力しながら、従来のアークスタート制御方法では、溶接ワイヤを断続的に送給する ため通常のアークスタート方式と比較して送給を停止する分アークスタートならびに 処理に要する時間が長くなるといった問題があった。 [0004] However, in the conventional arc start control method, since the welding wire is intermittently fed, the time required for the arc start and the processing is longer than that of the normal arc start method because the feed is stopped. There was a problem of becoming.
また、処理時間を短くするために溶接ワイヤの停止時間を減少させると溶接出力停 止時間が短くなるので、溶接ワイヤと被溶接物が溶着しやすくなるという問題を抱え ていた。  Also, if the stopping time of the welding wire is reduced in order to shorten the processing time, the welding output stopping time is shortened, so that the welding wire and the workpiece are easily welded.
そこで、本発明はこのような問題点に鑑みてなされたものであり、アークスタート時の 処理時間が長くなつたり溶接ワイヤが溶着したりすることなぐアークを確実に発生さ せることができるアークスタート制御方法を提供することを目的とする。  Accordingly, 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.
課題を解決するための手段  Means for solving the problem
[0005] 上記問題を解決するため、本発明は、次のような手順としたのである。 [0005] In order to solve the above problem, the present invention employs the following procedure.
請求項 1に記載の発明は、溶接電源を用いた消耗電極式ガスシールドアーク溶接 のアークスタート制御方法において、溶接開始指令を受けて、溶接出力を開始すると ともに溶接ワイヤを前進送給し、前記溶接ワイヤが被溶接物に接触するまでは溶接 電圧を制限し、前記溶接ワイヤが前記被溶接物に接触したことを検知した後に初期 電流を通電するとともに前記溶接ワイヤを後退送給し、アーク発生を確認して所定時 間経過した後に前記溶接ワイヤを再度前進送給することを特徴とする。 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.
請求項 2に記載の発明は、前記溶接電圧の制限値は、前記溶接ワイヤと前記被溶 接物との接触を検知できる最小値であることを特徴とする。  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.
請求項 3に記載の発明は、上記溶接電源は、インバータ式溶接電源であることを特 徴とする。  The invention according to claim 3 is characterized in that the welding power supply is an inverter-type welding power supply.
請求項 4に記載の発明は、前記溶接電圧の制限は、前記インバータでのパルス幅 変調制御のデューティ比を制限して行なうことを特徴とする。  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.
発明の効果  The invention's effect
[0006] 本発明によると、溶接ワイヤが被溶接物に接触した瞬間に溶接ワイヤと被溶接物と が溶着することなぐさらにスパッタのないアークスタートを確実に実現することができ る。  [0006] According to the present invention, it is possible to surely realize a spatter-free arc start without welding between the welding wire and the workpiece at the moment when the welding wire comes into contact with the workpiece.
図面の簡単な説明  Brief Description of Drawings
[0007] [図 1]本発明の実施例を示す溶接電源のブロック図 FIG. 1 is a block diagram of a welding power source showing an embodiment of the present invention.
[図 2]本発明の実施例を示すアークスタート制御のタイミングチャート  FIG. 2 is a timing chart of an arc start control showing an embodiment of the present invention.
[図 3]従来のアークスタート制御のタイミングチャート  [Figure 3] Timing chart of conventional arc start control
符号の説明  Explanation of symbols
[0008] 1 アーク溶接電源 [0008] 1 arc welding power supply
10 ワイヤ送給指令演算手段  10 Wire feed command calculation means
11 ワイヤ送給制御手段  11 Wire feed control means
12 溶接出力指令演算手段  12 Welding output command calculation means
13 溶接出力制御手段  13 Welding output control means
20 溶接出力制限手段  20 Welding output limiting means
30 三相電源  30 three-phase power supply
31 整流回路  31 Rectifier circuit
32 インバータ部  32 Inverter section
33 変圧器  33 Transformer
34 整流回路 発明を実施するための最良の形態 34 Rectifier circuit BEST MODE FOR CARRYING OUT THE INVENTION
[0009] 以下、本発明の具体的実施例を図に基づいて説明する。  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
実施例 1  Example 1
[0010] 図 1は、本発明のアーク溶接電源の内部ブロック図である。  FIG. 1 is an internal block diagram of the arc welding power supply of the present invention.
アーク溶接電源 1は、外部の三相電源 30からの交流を直流に変換する整流回路 3 1、インバータ部 32、変圧器 33、変圧器 33からの交流を再度直流に変換して出力す る整流回路 34に加えてワイヤ送給指令演算手段 10、ワイヤ送給制御手段 11、溶接 出力指令演算手段 12、溶接出力制御手段 13を備え、さらに溶接出力制限手段 20 を備えている。  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. In addition to the circuit 34, 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.
ワイヤ送給指令演算手段 10は、溶接シーケンス毎にワイヤ送給指令を演算し、ワイ ャ送給制御手段 11に指令を与える。ワイヤ送給制御手段 11は指令と実際の速度が 一致するようにフィードバック制御を行なう。  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.
溶接出力指令演算手段 12は、定電流制御時は電流指令を、定電圧制御時は電 圧指令を演算し、溶接出力制御手段 13に指令を与える。  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.
溶接出力制御手段 13は、指令と実際の電流値、電圧値が一致するようにフィード ノック制御を行なう。  The welding output control means 13 performs feed knock control so that the command and the actual current value and voltage value match.
[0011] 三相電源 30が出力する交流は、整流回路 31により直流に変換後、インバータ部 3 2により所望の溶接出力となるようにスイッチング時間が制御され、変圧器 33を通して 降圧後、再度整流回路 34により直流に変換され出力される。インバータ部 32のスィ ツチング時間は溶接出力制御手段 13により制御される。  [0011] 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.
溶接出力制限手段 20は、溶接電流が 10A— 50A以下となるように溶接出力を制 限する。具体的には、パルス幅変調制御のデューティ比の上限値を設定することによ り溶接出力の電圧を制限する。スイッチング時間の ON期間比率 (デューティ比）が小 さ 、と溶接出力は低く、 ON期間比率 (デューティ比）が大き!/、と溶接出力は大きくな る。  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! /.
インバータ部 32のデューティ比の上限を設定して溶接出力を制限するので、溶接 ワイヤが被溶接物に接触した瞬間に流れる溶接電流は 10A— 50A以下に抑えられ 、溶接ワイヤが被溶接物に溶着することがなく円滑に溶接ワイヤを引き上げることが でき、スパッタの発生を抑えアークを容易に発生させることができる。 Since 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.
なお、本実施例ではインバータ式の溶接電源を用いているが、電圧の制限が行え るものであれば、これに限定するものではない。  In this embodiment, an inverter-type welding power source is used. However, the present invention is not limited to this as long as the voltage can be limited.
[0012] 図 2に本発明のアーク溶接電源を用いたアークスタート制御方法のタイミングチヤ ートを示す。時刻 tOにおいて、溶接開始指令が ONになるとアーク溶接電源 1は初期 電圧 Viを出力するとともに、第 1ワイヤ送給速度 VIにて溶接ワイヤを送給する。この 時出力される初期電圧 Viは、溶接出力制限手段 20によって溶接ワイヤと被溶接物と の接触を検知することができる最小値に制限されている。  FIG. 2 shows a timing chart of the arc start control method using the arc welding power supply of the present invention. At time tO, when the welding start command is turned ON, 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.
時刻 t2において、溶接電圧が短絡判定閾値 Vs以下に低下することにより、溶接ヮ ィャと被溶接物の接触を検知すると、アーク溶接電源 1は初期電流 10を印加しながら 、溶接ワイヤを第 2ワイヤ送給速度 VRにて後退送給させる。  At time t2, when the welding voltage falls below the short-circuit determination threshold value Vs, thereby detecting contact between the welding wire and the workpiece, the arc welding power supply 1 applies the initial current 10 and switches the welding wire to the second. Wire feed speed Reverse feed at VR.
この溶接ワイヤと被溶接物とが接触した瞬間はアーク溶接電源 1の溶接出力は両 者を溶着させることのない初期電圧 Viに制限されているので 10A— 50A以下の溶 接電流しか流れず、溶接ワイヤが被溶接物に溶着することがなく円滑に溶接ワイヤを 引き上げることができ、スパッタを出さずにアークを容易に発生させることができる。 時刻 t3にてアーク発生を確認すると時刻 t4まで初期電流 10の通電と溶接ワイヤの 後退送給を継続し、時刻 t4にお ヽて溶接ワイヤを定常速度 Vfにて前進送給するとと もに、定常溶接状態に移行する。  At the moment when the welding wire comes into contact with the workpiece, 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. When the occurrence of an arc is confirmed at time t3, 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.
産業上の利用可能性  Industrial applicability
[0013] 本発明は、消耗電極式ガスシールドアーク溶接に適用できる。 [0013] The present invention is applicable to consumable electrode type gas shielded arc welding.

Claims

請求の範囲 The scope of the claims
[1] 溶接電源を用いた消耗電極式ガスシールドアーク溶接のアークスタート制御方法 において、  [1] An arc start control method for consumable electrode type gas shielded arc welding using a welding power source,
溶接開始指令を受けて、溶接出力を開始するとともに溶接ワイヤを前進送給し、 前記溶接ワイヤが被溶接物に接触するまでは溶接電圧を制限し、  Receiving a welding start command, starting welding output and feeding the welding wire forward, limiting the welding voltage until the welding wire comes into contact with the workpiece,
前記溶接ワイヤが前記被溶接物に接触したことを検知した後に初期電流を通電す るとともに前記溶接ワイヤを後退送給し、  After detecting that the welding wire has contacted the workpiece, an initial current is supplied and the welding wire is fed back,
アーク発生を確認して所定時間経過した後に前記溶接ワイヤを再度前進送給する ことを特徴とするアークスタート制御方法。  An arc start control method, wherein the welding wire is fed forward again after a predetermined time has elapsed after the occurrence of the arc has been confirmed.
[2] 前記溶接電圧の制限値は、前記溶接ワイヤと前記被溶接物との接触を検知できる 最小値であることを特徴とする請求項 1記載のアークスタート制御方法。  2. The arc start control method according to claim 1, wherein the welding voltage limit value is a minimum value at which contact between the welding wire and the workpiece can be detected.
[3] 上記溶接電源は、インバータ式溶接電源であることを特徴とする請求項 1または 2 記載のアークスタート制御方法。  3. The arc start control method according to claim 1, wherein the welding power supply is an inverter-type welding power supply.
[4] 前記溶接電圧の制限は、前記インバータでのパルス幅変調制御のデューティ比を 制限して行なうことを特徴とする請求項 3記載のアークスタート制御方法。  4. The arc start control method according to claim 3, wherein the limiting of the welding voltage is performed by limiting a duty ratio of the pulse width modulation control in the inverter.
PCT/JP2005/003844 2004-04-16 2005-03-07 Arc start control method WO2005099952A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935547A1 (en) * 2006-12-20 2008-06-25 Daihen Corporation Arc start control method in consumable electrode arc welding
CN106488823A (en) * 2014-09-08 2017-03-08 株式会社达谊恒 Arc welding control method
CN107498146A (en) * 2017-09-15 2017-12-22 唐山松下产业机器有限公司 welding system, electric arc welding control device and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09108837A (en) * 1995-10-19 1997-04-28 Osaka Denki Co Ltd Method and device for pulse arc welding
JP2002248572A (en) * 2001-02-23 2002-09-03 Daihen Corp Arc start control method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09108837A (en) * 1995-10-19 1997-04-28 Osaka Denki Co Ltd Method and device for pulse arc welding
JP2002248572A (en) * 2001-02-23 2002-09-03 Daihen Corp Arc start control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1935547A1 (en) * 2006-12-20 2008-06-25 Daihen Corporation Arc start control method in consumable electrode arc welding
CN106488823A (en) * 2014-09-08 2017-03-08 株式会社达谊恒 Arc welding control method
CN107498146A (en) * 2017-09-15 2017-12-22 唐山松下产业机器有限公司 welding system, electric arc welding control device and method

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