JP4211657B2 - Arc starting method and consumable electrode welding apparatus - Google Patents
Arc starting method and consumable electrode welding apparatus Download PDFInfo
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- JP4211657B2 JP4211657B2 JP2004103788A JP2004103788A JP4211657B2 JP 4211657 B2 JP4211657 B2 JP 4211657B2 JP 2004103788 A JP2004103788 A JP 2004103788A JP 2004103788 A JP2004103788 A JP 2004103788A JP 4211657 B2 JP4211657 B2 JP 4211657B2
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- 238000003466 welding Methods 0.000 title claims description 70
- 238000000034 method Methods 0.000 title claims description 13
- 238000001514 detection method Methods 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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Description
本発明は、消耗電極であるワイヤを連続的に送給しながらアーク溶接を行うアークスタート方法及び消耗電極用溶接装置に関するものである。 The present invention relates to an arc start method for performing arc welding while continuously feeding a wire which is a consumable electrode, and a consumable electrode welding apparatus.
従来の消耗電極用溶接装置においては、溶接開始のアーク状態を円滑にさせるために図11の信号波形に示すアークスタートの制御方法がとられていた(例えば特許文献1参照)。 In the conventional consumable electrode welding apparatus, the arc start control method shown in the signal waveform of FIG. 11 has been adopted in order to make the arc state at the start of welding smooth (see, for example, Patent Document 1).
すなわち、溶接電流無を検出している間、ワイヤ送給モータをONしてスローダウン速度のワイヤを送給し、ワイヤを被溶接物に接触させて初期短絡電流を通電検出し(図11の時間t1)、短絡状態を検知している間、モータON/OFF切換信号KをOFFしてワイヤ送給を停止させ、アーク状態を検出した(図11の時間t2)後にモータON/OFF切換信号KをONし、定常溶接速度のワイヤ送給にある一定の傾きをもって復帰させるアークスタート方法をとっていた。
一般にアークスタートが良好な瞬時スタートを行うためにはワイヤ先端と被溶接物との間の接触抵抗を大きくした状態で、ワイヤ先端部分を選択的に加熱溶融させ、この部分にアーク発生させることが必要である。 In general, in order to perform an instantaneous start with a good arc start, it is possible to selectively heat and melt the wire tip portion with an increased contact resistance between the wire tip and the work piece and generate an arc in this portion. is necessary.
しかし、従来のアークスタート制御方法では、ワイヤ先端にスラグ等の絶縁膜が介在する場合、前記絶縁膜をワイヤ押付力によって機械的に破壊し、初期短絡電流を通電させることになるが、この場合、通電までの間に送給されトーチ内に滞留したワイヤが通電に伴ってワイヤと被溶接物の接触部に押し出され、その部分の接触抵抗が減少するため、良好なアークスタートができないという課題を有していた。 However, in the conventional arc start control method, when an insulating film such as slag is present at the tip of the wire, the insulating film is mechanically destroyed by the wire pressing force and an initial short-circuit current is applied. The problem is that a good arc start cannot be performed because the wire that has been fed before energization and stayed in the torch is pushed out to the contact part between the wire and the work piece with energization, and the contact resistance of that part decreases. Had.
特にアルミニウムワイヤなどの固有抵抗率が低いために溶融しにくい場合には瞬時スタート状態と長時間短絡スタート状態の2種類の状態が発生しており、瞬時スタートとは、ワイヤを被溶接物に接触させ初期短絡電流の通電を検出し、短絡状態を検出した後に数msと直ちにアーク発生するスタート状態のことであり、長時間短絡スタート状態とは、ワイヤを被溶接物に接触させ初期短絡電流の通電を検出し、短絡状態を検出し数十ms後にアーク発生するスタート状態のことであるが、前記長時間短絡スタートのような状態では、ワイヤ表面状態や先端形状等の差異による影響を受け、ワイヤと被溶接物の接触部の接触抵抗が減少するためワイヤの半溶融状態が続いてアーク発生に時間がかかり、短絡状態を検出してからワイヤ停止するまでの押付力が加わりワイヤ変形から座屈状態を発生させワイヤ燃え上がりにつながり、ワイヤが通電チップに溶着する等の課題を発生させていた。 In particular, when the specific resistance of aluminum wire is low and it is difficult to melt, there are two types of states, an instantaneous start state and a long-term short-circuit start state. Instant start refers to contacting the wire with the workpiece. This is a start state in which an arc is generated immediately after detecting the short-circuit state and a short-circuit state is detected, and a short-circuit start state is a long-term short-circuit start state in which the wire is brought into contact with the workpiece to be welded. It is a start state where an energization is detected, a short circuit state is detected and an arc occurs after several tens of ms, but in a state such as the long time short circuit start, it is affected by differences in the wire surface state, tip shape, etc. Since the contact resistance between the contact part of the wire and the work piece decreases, the semi-molten state of the wire continues and it takes time to generate an arc, and the wire stops after detecting a short-circuit state. Leading to kindling wire to generate a buckled state of the pressing force is applied wire deformation, the wire had caused the problem, such as welded to the current chip.
この結果ワイヤ変形や座屈からワイヤ燃え上がり等を発生させて均一なアークスタート状態が得られなかった。 As a result, wire flares up due to wire deformation and buckling, and a uniform arc start state could not be obtained.
本発明は、ワイヤ変形や座屈からワイヤ燃え上がり等を発生させず均一な安定したアークスタートを行えるアークスタート方法及び消耗電極用溶接装置を提供することを目的とする。 An object of the present invention is to provide an arc start method and a consumable electrode welding apparatus capable of performing a uniform and stable arc start without generating wire burn-up due to wire deformation or buckling.
上記課題を解決するために本発明は、ワイヤ変形や座屈からワイヤ燃え上がり等を発生させる確率が高い長時間短絡スタートの場合にはワイヤが被溶接物に接触してからアークが発生するまでにワイヤ送給を逆回転送給する。 In order to solve the above-mentioned problems, the present invention provides a high probability of generating wire burn-up due to wire deformation or buckling, for a long-time short-circuit start until the arc is generated after the wire contacts the work piece. Wire feed is transferred in reverse.
そして、この方法によりワイヤ表面状態、先端形状、ワイヤ径、ワイヤ材質等に関係なく、逆回転送給によりワイヤ短絡から解放され、直ちにアーク発生し、ワイヤ変形や座屈等をおこすことなく、円滑かつ均一なアークスタート性能を得ることができるものである。 With this method, regardless of the wire surface state, tip shape, wire diameter, wire material, etc., the wire is released from the short circuit by reverse transfer feeding, and an arc is generated immediately, without causing wire deformation or buckling. In addition, uniform arc start performance can be obtained.
以上のように、本発明によれば、ワイヤが被溶接物に接触して一定時間後に短絡状態を検出した場合にはワイヤ送給を逆回転送給し短絡解放することにより、ワイヤ変形や座屈からワイヤ燃え上がり等を発生させる長時間短絡スタートの状態は発生せず、特にアルミニウムワイヤ等に対しては円滑かつ均一なアークスタート性能を得ることができる。 As described above, according to the present invention, when a short-circuit state is detected after a certain period of time after the wire comes into contact with the workpiece, the wire feed is reversely transferred and the short-circuit is released to There is no long-time short-circuit start state that causes wire burn-up from bending, and smooth and uniform arc start performance can be obtained particularly for aluminum wires and the like.
以下、本発明の実施の形態について、図1から図10を用いて説明する。
(実施の形態1)
図6および図7において、1は溶接用電源入力端子、2は溶接用変圧器、3は整流素子、4は溶接出力制御端子、5は溶接性能調整用リアクトル、6は電流検出器、7は溶接用電源出力端子、8は通電用コンタクトチップ、9はワイヤ、10は被溶接物、11は溶接アーク、12はワイヤ送給モータ、13は溶接電流検出回路、14はワイヤ短絡検出回路、15は出力制御回路、16はマイクロコンピュータ、17はガバナ回路、18はモータ駆動電圧指令回路、19はモータ駆動ON/OFF切換回路、20はモータ極性切換回路、21は送信回路、22は受信回路である。
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(Embodiment 1)
6 and 7, 1 is a power input terminal for welding, 2 is a transformer for welding, 3 is a rectifying element, 4 is a welding output control terminal, 5 is a reactor for adjusting welding performance, 6 is a current detector, 7 is Power supply output terminal for welding, 8 is a contact tip for energization, 9 is a wire, 10 is a workpiece, 11 is a welding arc, 12 is a wire feed motor, 13 is a welding current detection circuit, 14 is a wire short circuit detection circuit, 15 Is an output control circuit, 16 is a microcomputer, 17 is a governor circuit, 18 is a motor drive voltage command circuit, 19 is a motor drive ON / OFF switching circuit, 20 is a motor polarity switching circuit, 21 is a transmission circuit, and 22 is a reception circuit. is there.
以上のように構成された消耗電極用溶接装置について、その制御方法を説明する。 A control method for the consumable electrode welding apparatus configured as described above will be described.
ワイヤ短絡検出回路14は一対の溶接用電源出力端子間に接続され、溶接出力電圧が一定値以上か未満かを判定してこの判定結果によりワイヤ9が被溶接物10に接触短絡しているか非接触で溶接アークを発生しているかを判定して信号Sを出力する。 The wire short circuit detection circuit 14 is connected between a pair of welding power supply output terminals, determines whether the welding output voltage is equal to or higher than a certain value, and determines whether the wire 9 is in contact short-circuit with the workpiece 10 based on the determination result. It is determined whether a welding arc is generated by contact, and a signal S is output.
溶接電流検出回路13は溶接電流の有無を検出して検出信号Aを出力する。 The welding current detection circuit 13 detects the presence or absence of a welding current and outputs a detection signal A.
出力制御回路15は検出信号Aと信号Sを入力とし、ワイヤ送給モータ12に対し定常溶接速度への信号Mを出力する。 The output control circuit 15 receives the detection signal A and the signal S and outputs a signal M to the steady welding speed to the wire feed motor 12.
なお、図4のようにワイヤ送給モータ12に対し定常溶接速度まである一定の傾きをもった信号Mを出力する構成であってもよい。 In addition, the structure which outputs the signal M with a certain inclination to the steady welding speed with respect to the wire feed motor 12 like FIG. 4 may be sufficient.
さらに、出力制御回路15が検出信号Aと信号Sを入力する構成としては、図7のように送信回路21から受信回路22を介して入力する構成であってもよい。 Further, the configuration in which the output control circuit 15 inputs the detection signal A and the signal S may be a configuration in which the output signal is input from the transmission circuit 21 via the reception circuit 22 as shown in FIG.
次に出力制御回路15はマイクロコンピュータ16とモータ駆動用のガバナ回路17から構成される。またガバナ回路17はモータ駆動電圧指令回路18とモータON/OFF切換回路19とモータ極性切換回路20から構成される。マイクロコンピュータ16に検出信号Aと信号Sを入力し、図8に示すプログラミングに従ってワイヤ送給速度を電圧レベルによりモータ駆動電圧指令回路18に信号Vを出力し、モータON/OFF切換回路19に信号Nを出力、またモータ極性切換回路20に信号Kを出力する。マイクロコンピュータ16からガバナ回路17への信号V,N、Kをワイヤ送給モータへの命令信号Mに変換して出力する。 Next, the output control circuit 15 comprises a microcomputer 16 and a governor circuit 17 for driving the motor. The governor circuit 17 includes a motor drive voltage command circuit 18, a motor ON / OFF switching circuit 19, and a motor polarity switching circuit 20. The detection signal A and the signal S are input to the microcomputer 16, the signal V is output to the motor drive voltage command circuit 18 according to the programming shown in FIG. N is output, and a signal K is output to the motor polarity switching circuit 20. Signals V, N and K from the microcomputer 16 to the governor circuit 17 are converted into a command signal M to the wire feed motor and output.
次に前記構成における作用を図1(A、B)と図8に示すプログラミングに従って説明する。 Next, the operation of the above configuration will be described according to the programming shown in FIGS. 1A and 1B and FIG.
溶接開始時は、出力制御回路15はワイヤ送給モータ12にスローダウン速度の出力信号を送る。スローダウン速度で送給されてきてワイヤ9が被溶接物10に接触短絡する(図1の時間t1)と溶接電流検出信号Aは溶接電流有の状態を出力する。同時にワイヤ短絡検出信号Sはワイヤ短絡の状態を出力する。マイクロコンピュータ16は溶接電流有の信号Aとワイヤ短絡の信号Sを受けてから一定時間後(図1の時間t2)に、アークの状態の場合には今までのスローダウン速度を継続し、またワイヤ短絡の状態の場合にはモータ極性切換信号Kは逆回転とし、ガバナ回路のモータ極性切換回路20に送りワイヤ送給モータ12への命令信号Mはワイヤ逆回転送給となる。さらに図5のように、ワイヤ逆回転送給量を1mm〜突出し量の2/3mmと制御することが安定した定常溶接へと移行することができる。 At the start of welding, the output control circuit 15 sends a slowdown speed output signal to the wire feed motor 12. When the wire 9 is fed at a slow-down speed and the wire 9 contacts and is short-circuited to the workpiece 10 (time t1 in FIG. 1), the welding current detection signal A outputs a state with a welding current. At the same time, the wire short circuit detection signal S outputs a wire short circuit state. The microcomputer 16 continues the current slowdown speed in the case of an arc after a certain time (time t2 in FIG. 1) after receiving the signal A with welding current and the signal S of wire short circuit, In the case of a wire short-circuit state, the motor polarity switching signal K is reversely rotated, the command signal M to the wire feeding motor 12 is sent to the motor polarity switching circuit 20 of the governor circuit, and the wire is reversely transferred. Further, as shown in FIG. 5, controlling the wire reverse feed amount from 1 mm to 2/3 mm of the protruding amount can shift to stable steady welding.
これらの制御状態が継続されることによりワイヤ9は短絡状態から解放され、アーク発生する(図1の時間t3)。この結果、ワイヤ短絡検出信号Sはアークの状態へ反転するのでモータ極性切換信号Kは正回転とし、ガバナ回路17のモータ極性切換回路20はワイヤ送給モータ12にスローダウン速度への復帰する出力信号Mを出力する。 By continuing these control states, the wire 9 is released from the short-circuit state and an arc is generated (time t3 in FIG. 1). As a result, since the wire short circuit detection signal S is inverted to the arc state, the motor polarity switching signal K is rotated in the forward direction, and the motor polarity switching circuit 20 of the governor circuit 17 outputs to the wire feeding motor 12 the return to the slowdown speed. The signal M is output.
以上のように、本実施の形態によれば溶接電流有の信号Aとワイヤ短絡の信号Sを受けてから一定時間後にワイヤ短絡の状態の場合にはワイヤ逆回転送給することによりワイヤ9は短絡状態から解放され、アーク発生させることができる。
(実施の形態2)
本実施の形態において実施の形態1と同様の構成については同一の番号を付して詳細な説明を省略する。
As described above, according to the present embodiment, when the wire 9 is in a short circuit state after receiving a signal A having a welding current and a signal S of a wire short circuit, the wire 9 is transferred in the reverse direction in the case of a wire short circuit state. It is released from the short-circuit state and can generate an arc.
(Embodiment 2)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
実施の形態1と同様の構成における作用を図2(A,B)と図9に示すプログラミングに従って説明する。 The operation in the same configuration as that of the first embodiment will be described according to the programming shown in FIGS. 2 (A, B) and FIG.
溶接開始時は、出力制御回路15はワイヤ送給モータ12にスローダウン速度の出力信号を送る。スローダウン速度で送給されてきてワイヤ9が被溶接物10に接触短絡する(図2の時間t1)と溶接電流検出信号Aは溶接電流有の状態を出力する。同時にワイヤ短絡検出信号Sはワイヤ短絡の状態を出力する。マイクロコンピュータ16は溶接電流有の信号Aとワイヤ短絡の信号Sを受けているのでモータON/OFF切換信号NはOFFを出力とし、ガバナ回路のモータON/OFF切換回路19に送りワイヤ送給モータ12への命令信号Mはワイヤ送給停止となる。さらに一定時間後(図2の時間t2)に、アークの状態の場合にはワイヤ短絡検出信号Sはアークの状態へ反転するのでモータON/OFF切換信号NはONを出力とし、ガバナ回路のモータON/OFF切換回路19に送りワイヤ送給モータ12にスローダウン速度への復帰する出力信号Mを出力する。またワイヤ短絡の状態の場合にはモータON/OFF切換信号NはONを出力としてモータ極性切換信号Kは逆回転とし、ガバナ回路17のモータ極性切換回路20に送りワイヤ送給モータ12への命令信号Mはワイヤ逆回転送給となる。さらに、ワイヤ逆回転送給量を1mm〜突出し量の2/3mmと制御することが安定した定常溶接へと移行することができる。これらの制御状態が継続されることによりワイヤ9は短絡状態から解放され、アークが発生する(図2の時間t3)。 At the start of welding, the output control circuit 15 sends a slowdown speed output signal to the wire feed motor 12. When the wire 9 is short-contacted and short-circuited to the workpiece 10 (time t1 in FIG. 2), the welding current detection signal A outputs a state with a welding current. At the same time, the wire short circuit detection signal S outputs a wire short circuit state. Since the microcomputer 16 receives the signal A with the welding current and the signal S of the wire short circuit, the motor ON / OFF switching signal N is output as OFF, and is sent to the motor ON / OFF switching circuit 19 of the governor circuit and sent to the wire feeding motor. The command signal M to 12 stops the wire feeding. Further, after a certain time (time t2 in FIG. 2), in the case of an arc, the wire short circuit detection signal S is inverted to the arc state, so the motor ON / OFF switching signal N is output as ON, and the motor of the governor circuit An output signal M for returning to the slow-down speed is output to the feed wire feeding motor 12 to the ON / OFF switching circuit 19. When the wire is short-circuited, the motor ON / OFF switching signal N is output as ON and the motor polarity switching signal K is rotated in the reverse direction, and is sent to the motor polarity switching circuit 20 of the governor circuit 17 to send a command to the wire feeding motor 12. The signal M is a wire reverse transfer. Furthermore, it is possible to shift to stable steady welding by controlling the wire reverse feed amount from 1 mm to 2/3 mm of the protruding amount. By continuing these control states, the wire 9 is released from the short-circuit state, and an arc is generated (time t3 in FIG. 2).
この結果、ワイヤ短絡検出信号Sはアークの状態へ反転するのでモータ極性切換信号Kは正回転とし、ガバナ回路17のモータ極性切換回路20はワイヤ送給モータ12にスローダウン速度への復帰する出力信号Mを出力する。 As a result, since the wire short circuit detection signal S is inverted to the arc state, the motor polarity switching signal K is rotated in the forward direction, and the motor polarity switching circuit 20 of the governor circuit 17 outputs to the wire feeding motor 12 the return to the slowdown speed. The signal M is output.
本実施の形態で実施の形態1と異なるのは、マイクロコンピュータ16が溶接電流有の信号Aとワイヤ短絡の信号Sを受けてモータON/OFF切換信号NがOFFを出力し、モータON/OFF切換回路19に送りワイヤ送給モータ12への命令信号Mを送給停止とした点である。 The present embodiment is different from the first embodiment in that the microcomputer 16 receives the signal A with the welding current and the signal S of the wire short circuit and outputs the motor ON / OFF switching signal N to turn off the motor ON / OFF. This is the point that the command signal M to the feed wire feed motor 12 is stopped at the switching circuit 19.
以上のように、本実施の形態によれば溶接電流有の信号Aとワイヤ短絡の信号Sを受けているのでワイヤ短絡の状態を検出してワイヤ送給を停止し、一定時間後にワイヤ短絡の状態の場合にはワイヤ9を逆回転送給することにより溶接ワイヤは短絡状態から解放され、アーク発生させることができる。 As described above, according to the present embodiment, since the signal A with the welding current and the signal S of the wire short circuit are received, the state of the wire short circuit is detected, the wire feeding is stopped, and the wire short circuit is detected after a certain time. In the state, the welding wire is released from the short-circuit state by transferring the wire 9 in the reverse direction, and an arc can be generated.
これは、実施の形態1よりもさらに素早くアーク発生させることができるものである。
(実施の形態3)
本実施の形態において実施の形態1と同様の構成については同一の番号を付して詳細な説明を省略する。
This can generate an arc more quickly than the first embodiment.
(Embodiment 3)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
実施の形態1と同様の構成における作用を図3(A、B)と図10に示すプログラミングに従って説明する。 The operation in the same configuration as in the first embodiment will be described according to the programming shown in FIGS. 3 (A, B) and FIG.
溶接開始時は、出力制御回路15はワイヤ送給モータ12にスローダウン速度の出力信号を送る。スローダウン速度で送給されてきてワイヤ9が被溶接物10に接触短絡する(図3の時間t1)と溶接電流検出信号Aは溶接電流有の状態を出力する。同時にワイヤ短絡検出信号Sはワイヤ短絡の状態を出力する。マイクロコンピュータ16は溶接電流有の信号Aとワイヤ短絡の信号Sを受けているのでモータ極性切換信号Kは逆回転を出力とし、ガバナ回路のモータ極性切換回路20に送りワイヤ送給モータ12への命令信号Mはワイヤ逆回転送給となる。さらに、ワイヤ逆回転送給量を1mm〜突出し量の2/3mmと制御することが安定した定常溶接へと移行することができる。一定時間後(図3の時間t2)に、アークの状態の場合にはワイヤ短絡検出信号Sはアークの状態へ反転するのでモータ極性切換信号Kは正回転を出力とし、モータ極性切換回路に送りワイヤ送給モータ12にスローダウン速度まで復帰する出力信号Mを出力する。またワイヤ短絡の状態の場合には制御状態を継続することによりワイヤは短絡状態から解放され、アーク発生する(図3の時間t3)。 At the start of welding, the output control circuit 15 sends a slowdown speed output signal to the wire feed motor 12. When the wire 9 is short-contacted and short-circuited to the workpiece 10 (time t1 in FIG. 3), the welding current detection signal A outputs a state with a welding current. At the same time, the wire short circuit detection signal S outputs a wire short circuit state. Since the microcomputer 16 receives the signal A with welding current and the signal S of the wire short circuit, the motor polarity switching signal K outputs reverse rotation and is sent to the motor polarity switching circuit 20 of the governor circuit and sent to the wire feeding motor 12. The command signal M is transferred in reverse wire. Furthermore, it is possible to shift to stable steady welding by controlling the wire reverse feed amount from 1 mm to 2/3 mm of the protruding amount. After a certain time (time t2 in FIG. 3), in the case of an arc, the wire short circuit detection signal S is inverted to the arc state, so the motor polarity switching signal K is output as a normal rotation and sent to the motor polarity switching circuit. An output signal M for returning to the slow-down speed is output to the wire feed motor 12. In the case of a wire short-circuit state, the control state is continued to release the wire from the short-circuit state, and an arc is generated (time t3 in FIG. 3).
この結果ワイヤ短絡検出信号Sはアークの状態へ反転するのでモータ極性切換信号Kは正回転とし、ガバナ回路17のモータ極性切換回路20はワイヤ送給モータ12にスローダウン速度まで復帰する出力信号Mを出力する。 As a result, the wire short circuit detection signal S is inverted to the arc state, so that the motor polarity switching signal K is rotated in the forward direction, and the motor polarity switching circuit 20 of the governor circuit 17 returns to the wire feed motor 12 to the slowdown speed. Is output.
本実施の形態で実施の形態1と異なるのは、マイクロコンピュータ16が溶接電流有の信号Aとワイヤ短絡の信号Sを受けてモータ極性切換信号Kは逆回転を出力とし、モータ極性切換回路20に送りワイヤ送給モータ12への命令信号Mは逆回転送給とした点である。 The present embodiment is different from the first embodiment in that the microcomputer 16 receives the signal A with welding current and the signal S of the wire short circuit, and the motor polarity switching signal K outputs reverse rotation, and the motor polarity switching circuit 20 The command signal M to the feed wire feed motor 12 is a reverse transfer feed.
以上のように、本実施の形態によれば溶接電流有の信号Aとワイヤ短絡の信号Sを受けているのでワイヤ短絡の状態を検出してワイヤ逆回転送給し、一定時間後にワイヤ短絡の状態の場合には制御状態を継続することによりワイヤ9は短絡状態から解放され、アーク発生させることができる。 As described above, according to the present embodiment, since the signal A with the welding current and the signal S of the wire short circuit are received, the state of the wire short circuit is detected and the wire is transferred in the reverse direction. In the case of the state, by continuing the control state, the wire 9 is released from the short-circuit state, and an arc can be generated.
これは、実施の形態2よりもさらにアーク発生させることができるものである。 This can generate an arc more than in the second embodiment.
本発明によれば、ワイヤ表面状態や先端形状等の差異による影響を受けてワイヤ停止するまでの押付力が加わりワイヤ変形から座屈事故を発生させワイヤ燃え上がり等を発生させていたアークスタート状態を防止し、ワイヤ表面状態、先端形状、ワイヤ径、ワイヤ材質等に関係なく、均一かつ安定したアークスタート状態を提供することでき、消耗電極である溶接ワイヤを連続的に送給しながらアーク溶接を行う消耗電極用溶接装置に有用である。 According to the present invention, the arc start state in which a pressing force is applied until the wire stops due to the influence of the difference in the wire surface state and the tip shape, etc., causing a buckling accident from the wire deformation and causing the wire burn-up, etc. It is possible to provide a uniform and stable arc start state regardless of the wire surface state, tip shape, wire diameter, wire material, etc., and arc welding while continuously feeding the welding wire as a consumable electrode This is useful for a consumable electrode welding apparatus.
1 溶接用電源入力端子
2 溶接用変圧器
3 整流素子
4 溶接出力制御端子
5 溶接性能調整用リアクトル
6 電流検出器
7 溶接用電源出力端子
8 通電用コンタクトチップ
9 ワイヤ
10 被溶接物
11 溶接アーク
12 ワイヤ送給モータ
13 溶接電流検出回路
14 ワイヤ短絡検出回路
15 出力制御回路
16 マイクロコンピュータ
17 ガバナ回路
18 モータ駆動電圧指令回路
19 モータ駆動ON/OFF切換回路
20 モータ極性切換回路
21 送信回路
22 受信回路
DESCRIPTION OF SYMBOLS 1 Power supply input terminal for welding 2 Transformer for welding 3 Rectifier 4 Welding output control terminal 5 Reactor for welding performance adjustment 6 Current detector 7 Power supply output terminal for welding 8 Contact tip for electricity supply 9 Wire 10 Workpiece 11 Welding arc 12 Wire feed motor 13 Welding current detection circuit 14 Wire short circuit detection circuit 15 Output control circuit 16 Microcomputer 17 Governor circuit 18 Motor drive voltage command circuit 19 Motor drive ON / OFF switch circuit 20 Motor polarity switch circuit 21 Transmit circuit 22 Receive circuit
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