JPS6139150B2 - - Google Patents
Info
- Publication number
- JPS6139150B2 JPS6139150B2 JP52067498A JP6749877A JPS6139150B2 JP S6139150 B2 JPS6139150 B2 JP S6139150B2 JP 52067498 A JP52067498 A JP 52067498A JP 6749877 A JP6749877 A JP 6749877A JP S6139150 B2 JPS6139150 B2 JP S6139150B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- welding
- current value
- deceleration
- welding machine
- 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.)
- Expired
Links
- 238000003466 welding Methods 0.000 claims description 109
- 230000002441 reversible effect Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 7
- 230000001174 ascending effect Effects 0.000 description 5
- 239000010953 base metal Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Arc Welding Control (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、アークを下向きに出しながら摺動
当金とトーチを含む溶接機本体が上昇しつつ突き
合わせた母材間の立向上進溶接を行なうエレクト
ロガスアーク溶接機の自動上昇装置に関するもの
である。[Detailed Description of the Invention] [Field of Industrial Application] This invention performs vertical advancement welding between base metals that are butted together while the welding machine body including a sliding butt and a torch rises while emitting an arc downward. This invention relates to an automatic lifting device for an electrogas arc welding machine.
エレクトロガスアーク溶接機の上昇速度の調整
方法としては定電圧直流電源を使用し溶接条件が
ほぼ一定に保持された状態であれば、溶接電流は
溶接ワイヤの突出長さに対してほぼ直線性の負特
性（第６図）を示すことを利用して上昇速度にフ
イードバツクする自動による方法が知られてい
る。
The method for adjusting the rising speed of an electrogas arc welding machine is to use a constant voltage DC power supply and to maintain the welding conditions almost constant, the welding current will have a negative linearity with respect to the protruding length of the welding wire. An automatic method is known in which the characteristic (FIG. 6) is used to provide feedback on the climbing speed.
こうした従来型のエレクトロガスアーク溶接機
における上昇速度制御は、検出電流値と設定値の
差により溶接機の上昇速度を単一的に低速が高速
に切換えるが、高速から低速へ一気に切換える方
法がとられていた。
In conventional electrogas arc welding machines, the rising speed is controlled by switching the rising speed of the welding machine from low speed to high speed based on the difference between the detected current value and the set value. was.
これら従来型の溶接機では、溶接機の上昇速度
が高速と低速の２段階しかないので開先形状の変
動の程度にかかわらず、常に大きく変化するため
摺動ブロツクの摺動性が悪く、ビート外観がなめ
らかでなく、摺動ブロツクの急激な速度変化でひ
つかき割れが生じる場合があつた。 With these conventional welding machines, the rising speed of the welding machine has only two stages, high and low, so regardless of the degree of variation in the groove shape, the groove shape always changes greatly, resulting in poor sliding properties of the sliding block and The appearance was not smooth, and sudden changes in the speed of the sliding block could cause scratches and cracks.
そこで、この発明は前記の様な従来型のエレク
トロガスアーク溶接機の不都合を改善して溶接機
の上昇速度変化が滑らかで溶融プールの上昇速度
と溶接機の上昇速度が一致している場合には、あ
る一定速度で上昇し、開先断面積の変動があつて
溶融プールの上昇速度が変化した場合でも溶接機
の上昇速度を徐々に増減して滑らかに変化対応さ
せ、摺動ブロツクの摺動性を確保しつつビード外
観が良好でかつ摺動ブロツクの急激な移動で溶融
金属にひつかき割れの生じることもないエレクト
ロガスアーク溶接機の自動上昇装置を提供するこ
とを目的とする。 Therefore, this invention improves the above-mentioned disadvantages of the conventional electrogas arc welding machine, and when the welding machine's rising speed changes smoothly and the rising speed of the molten pool and the welding machine match, , the welding machine rises at a certain speed, and even if the groove cross-sectional area changes and the rising speed of the molten pool changes, the rising speed of the welding machine is gradually increased or decreased to smoothly correspond to the change, and the sliding of the sliding block is To provide an automatic lifting device for an electrogas arc welding machine, which has a good bead appearance while ensuring properties, and which does not cause cracking in molten metal due to rapid movement of a sliding block.
この発明によるエレクトロガスアーク溶接機の
自動上昇装置は溶接電源に接続されて溶接電流値
Ｉを検出する溶接電流検出部と、
所定の増速基準電流値と、当該増速基準電流値
よりも所定値だけ低い減速基準電流値と、さらに
当該減速基準電流値よりも所定値だけ低い低速基
準電流値が各々基準値として設定されると共に前
記溶接電流検出部の出力側に並列に接続された増
速用、減速用及び低速用の比較部とを備え、
これらの比較部は前記溶接電流値Ｉが前記増速
基準電流値を超えた場合には増速用比較部が、ま
た前記溶接電流値Ｉが前記減速基準電流値を下回
つた場合には減速用比較部がさらに前記溶接電流
Ｉが前記低速基準電流値を下回つた場合には低速
用比較部が各々作動して信号を出力し、
さらに、基準クロツクを出力する基準発振器
と、前記増速用及び減速用比較部からの出力信号
を入力し、前記基準発振器からの基準クロツクで
ゲートして増速用及び減速用パルス信号を出力す
るゲート部と、
当該ゲート部からの前記両パルス信号を入力し
て増速用パルス信号をアツプカウントすると共に
減速用パルス信号をダウンカウントして速度指令
信号を生成し、前記駆動回路に出力する可逆計数
器と、
当該可逆計数器と前記駆動回路とのライン間に
挿入して接続され、前記低速用比較部の出力信号
を入力すると開状態となる常閉接点とを備え、
当該常閉接点が開状態となると前記駆動回路は
低速で溶接機本体を上昇させるものである。
The automatic raising device for an electrogas arc welding machine according to the present invention includes a welding current detection section connected to a welding power source to detect a welding current value I, a predetermined speed-up reference current value, and a predetermined value higher than the speed-up reference current value. A deceleration reference current value that is lower than the deceleration reference current value by a predetermined value and a low-speed reference current value that is further lower than the deceleration reference current value by a predetermined value are respectively set as reference values, and a speed increaser that is connected in parallel to the output side of the welding current detection section. , a comparison section for deceleration and a comparison section for low speed, and these comparison sections include a comparison section for speed increase when the welding current value I exceeds the speed increase reference current value, and a comparison section for speed increase when the welding current value I exceeds the speed increase reference current value. When the welding current I falls below the deceleration reference current value, the deceleration comparison section operates, and when the welding current I falls below the low-speed reference current value, the low-speed comparison sections operate and output a signal, and , a reference oscillator that outputs a reference clock, and a gate that inputs the output signals from the speed-up and deceleration comparators, gates with the reference clock from the reference oscillator, and outputs speed-up and deceleration pulse signals. and a reversible counter that inputs both of the pulse signals from the gate section, counts up the speed increasing pulse signal, and down counts the decelerating pulse signal to generate a speed command signal, and outputs the same to the drive circuit. and a normally closed contact that is inserted and connected between a line between the reversible counter and the drive circuit and becomes open when an output signal of the low speed comparison section is input, and the normally closed contact is opened. When this occurs, the drive circuit raises the welding machine body at a low speed.
以下、図示するこの発明の実施例により説明す
る。第１図ａに示した様に、自動上昇装置により
制御されるエレクトロガスアーク溶接機は母材
１，２の突合せ開先端部間に溶接トーチ３を挿入
し、これから溶接ワイヤ４を適正な溶接条件に対
応した一定供給速度で連続的に送り出しつつ、母
材１，２間に誇つて添接された表裏当金５，６の
間で摺動当金５とともにトーチ３を含む溶接機本
体７を上昇させて溶接が行なわれ、溶接部８には
適切なガスが供給される。この溶接機は第１図ｂ
に示した様に上昇装置１０を含む溶接機本体７
と、その上昇速度を制御する上昇駆動制御器１１
及び溶接電源１３によつて構成される。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to illustrated embodiments. As shown in Fig. 1a, an electrogas arc welding machine controlled by an automatic lifting device inserts a welding torch 3 between the abutting open ends of base materials 1 and 2, and then welds a welding wire 4 under appropriate welding conditions. While continuously feeding at a constant supply speed corresponding to Welding is performed by raising the welding area 8, and appropriate gas is supplied to the welding part 8. This welding machine is shown in Figure 1b.
Welding machine main body 7 including lifting device 10 as shown in
and an ascending drive controller 11 that controls its ascending speed.
and a welding power source 13.
上昇駆動制御器１１は溶接機本体７に設けられ
た上昇装置１０を後段で詳述する増速、減速信号
の可逆演算で生成される速度、又は予め設定され
た低速で上昇制御するものであり第２図の回路ブ
ロツク図で構成を詳述する。 The ascending drive controller 11 controls the ascending device 10 provided in the welding machine body 7 at a speed generated by reversible calculation of speed increasing and decelerating signals, which will be detailed later, or at a preset low speed. The configuration will be explained in detail using the circuit block diagram shown in FIG.
ここで溶接機本体７に溶接電流を供給する溶接
電源１３にはシヤント１４ａが接続されており、
このシヤント１４ａをセンサとする溶接電流検出
器１４により溶接電流Ｉが電圧値Ｖとして検出さ
れる。 Here, a shunt 14a is connected to the welding power source 13 that supplies welding current to the welding machine main body 7,
Welding current I is detected as voltage value V by welding current detector 14 which uses this shunt 14a as a sensor.
その検出信号は増幅器１５において増幅され次
段に出力される。この増幅器１５の出力側には、
増速用、減速用、及び減速用の３つの比較器１
６，１７，１８が並列に接続され、各々の比較器
１６，１７，１８には、基準電流設定器１９から
各々の比較基準値が設定される。 The detection signal is amplified by an amplifier 15 and output to the next stage. On the output side of this amplifier 15,
Three comparators 1 for speed increase, deceleration, and deceleration
6, 17, and 18 are connected in parallel, and each comparison reference value is set to each comparator 16, 17, and 18 from a reference current setting device 19.
増速用及び減速用比較器１６，１７の出力は基
準発振器２６からの基準クロツクで動作するゲー
ト２３，２４に入力され、このゲート２３，２４
でパルス信号化された出力は次段に設けられた可
逆計数器２５の加算入力及び減算入力に各々入力
される。 The outputs of the speed increasing and decelerating comparators 16 and 17 are input to gates 23 and 24 operated by the reference clock from the reference oscillator 26.
The outputs converted into pulse signals are input to the addition input and subtraction input of a reversible counter 25 provided at the next stage, respectively.
ここで、第３図に詳細な回路素子構成で示した
様に、増幅器１５からは、検出された溶接電流値
Ｉは電圧値Eoutとして出力され、増速用、減速
用及び低速用の各比較器１６の非反転入力側に、
１７，１８の反転入力側に印加される。 Here, as shown in the detailed circuit element configuration in FIG. 3, the detected welding current value I is output from the amplifier 15 as a voltage value Eout, and each comparison for speed increase, deceleration, and low speed is performed. On the non-inverting input side of the device 16,
It is applied to the inverting input sides of 17 and 18.
基準電流設定器１９は、互いに並列に接続され
た可変抵抗体、２０，２１，２２から構成され、
各可変抵抗体２０，２１，２２はそれぞれ比較器
１６の反転入力側に、１７，１８の非反転入力側
に接続され、各々の増速用基準電流値、減速用基
準電流値及び低速用基準電流値（以下、各々ＶI
Ｈ，ＶIL，ＶILLとする）を任意に設定可能とな
つている。 The reference current setting device 19 is composed of variable resistors 20, 21, and 22 connected in parallel with each other,
Each variable resistor 20, 21, 22 is connected to the inverting input side of the comparator 16 and the non-inverting input side of the comparator 17, 18, respectively, and is connected to the respective reference current value for speed increase, reference current value for deceleration, and reference current value for low speed. Current value (hereinafter, each V I
H , VIL , VILL ) can be set arbitrarily.
各基準値ＶIH，ＶIL，ＶILL＞ＶIL＞ＶILLの関
数を有するもものである。 Each reference value has a function of V IH , V IL , V ILL >V IL >V ILL .
したがつて、Eout＞ＶIHとなる場合には、増
速用の比較器１６が作動して信号が出力され、同
様にEout＜ＶILの場合は、減速用の比較器１７
が作動し、さらにEout＜ＶILLとなると低速用の
比較器１８が作動して各々信号を出力する。 Therefore, when Eout>V IH , the comparator 16 for speed increase operates and a signal is output, and similarly, when Eout<V IL , the comparator 17 for deceleration operates.
is activated, and when Eout< VILL , the low speed comparator 18 is activated and outputs each signal.
増速用の比較器１６の出力はANDゲート２と
NOT回路素子４５に入力され、もう一方の減速
用の比較器１７の出力は、ANDゲート２４と
NOT回路素子４６に入力される。 The output of the speed increasing comparator 16 is connected to the AND gate 2.
The output of the other deceleration comparator 17 is input to the NOT circuit element 45, and the output of the other deceleration comparator 17 is connected to the AND gate 24.
It is input to NOT circuit element 46.
また、ANDゲート２３，２４のもう一方の入
力側には、基準発振器２６の基準クロツクが入力
され、両ANDゲート２３，２４は各々前記比較
器１６，１７からの入力信号を基準クロツクでゲ
ートされてパルス信号となりNANDゲート２
３′，２４′に各々出力される。 Further, the reference clock of the reference oscillator 26 is input to the other input side of the AND gates 23 and 24, and both AND gates 23 and 24 gate the input signals from the comparators 16 and 17 with the reference clock. becomes a pulse signal and NAND gate 2
3' and 24', respectively.
また、NOT回路素子４５，４６で反転された
信号は、FF回路３５に入力され、このFF回路３
５の出力はNANDゲート２３′，２４′のもう一方
の入力端子に印加される。さらにNANDゲート２
２３′，２４′の出力は各々可逆計数器２５の加算
端子と減算端子に入力されて可逆計算される。 Further, the signals inverted by the NOT circuit elements 45 and 46 are input to the FF circuit 35, and this FF circuit 3
The output of 5 is applied to the other input terminal of NAND gates 23' and 24'. Furthermore, NAND gate 2
The outputs of 23' and 24' are input to the addition terminal and subtraction terminal of a reversible counter 25, respectively, and are reversibly calculated.
すなわち、この第３図のブロツクでは、比較器
１６，１７からの信号はANDゲート２３，２４
を介して基準発振器２６からの基準クロツクによ
つてパルス信号に変換され、FF回路３５と
NANDゲート２３′，２４′によりノイズが除去さ
れて可逆計数器２５に入る。 That is, in the block of FIG. 3, the signals from comparators 16 and 17 are sent to AND gates 23 and 24.
is converted into a pulse signal by the reference clock from the reference oscillator 26 via the FF circuit 35.
Noise is removed by NAND gates 23' and 24', and the resultant signal enters a reversible counter 25.
ここで第２図に示した様に、可逆計数器２５の
出力は、DA変換器２７でDA変換され、増幅器２
８で増幅された後に、常間接３１ｂを介して溶接
機本体７に速度信号として出力される。この実施
例では可逆計数器２５の出力をDA変換器でDA変
換した後に溶接機本体７に出力するものとした出
力がアナログ信号となる可逆計数器を用いれば
DA変換器２７は省略することもある。 Here, as shown in FIG. 2, the output of the reversible counter 25 is DA converted by the DA converter 27,
After being amplified at step 8, the signal is output as a speed signal to the welding machine main body 7 via the constant joint 31b. In this embodiment, the output of the reversible counter 25 is DA-converted by a DA converter and then outputted to the welding machine main body 7. If a reversible counter is used whose output is an analog signal,
The DA converter 27 may be omitted.
また、可逆計数器２５には、ラツチ回路３０が
備えられており、計数の上限（最大計数値）と下
限（最小計数値）を保持可能となつている。 Further, the reversible counter 25 is equipped with a latch circuit 30, and is capable of holding an upper limit (maximum count value) and a lower limit (minimum count value) of counting.
さらに、増幅器２８には、後述する上昇装置１
０の送度範囲を設定する最高速度設定器３３が備
えられている。 Furthermore, the amplifier 28 includes a lifting device 1 which will be described later.
A maximum speed setting device 33 for setting a feed range of 0 is provided.
この最高速度設定３３は第５図に示したよう
に、増幅器２８と並列に接続した可変抵抗Rfで
増幅率を変化させることにより駆動回路１２への
入力電圧を変化させ、これによつて上昇速度範囲
を任意に設定可能となつている。 As shown in FIG. 5, this maximum speed setting 33 changes the input voltage to the drive circuit 12 by changing the amplification factor with a variable resistor Rf connected in parallel with the amplifier 28, thereby increasing the speed of increase. The range can be set arbitrarily.
ここで増幅器２８の出力電圧E0は、 E0＝Ｒｆ／ＲｓEt で与えられ、Ｒｆ／Ｒｓは増幅率であり、EtはDA変換器 ２７からの出力電圧である。 Here, the output voltage E 0 of the amplifier 28 is given by E 0 =Rf/RsEt, where Rf/Rs is the amplification factor and Et is the output voltage from the DA converter 27.
また第２図において低速用の比較器１８の出力
は、低速制御回路２９に入力され、検出信号が一
定値以下（Eout＜ＶILL）となつた場合、低速制
御回路２９からの出力信号で常閉接点３１ｂを開
放する。 In addition, in FIG. 2, the output of the low-speed comparator 18 is input to the low-speed control circuit 29, and when the detection signal is below a certain value (Eout< VILL ), the output signal from the low-speed control circuit 29 is always used. Open the closed contact 31b.
この低速制御回路２９は、第４図に示した様
に、低速用の比較器１８に加えられる検出値
EoutがＶILLより小さい時に低速用の比較器１８
からの出力信号が入力される。 This low-speed control circuit 29, as shown in FIG.
Comparator 18 for low speed when Eout is smaller than V ILL
The output signal from is input.
この出力信号の入力でトランジスタ３６がON
になると、フオトカプラ３７がONになり、かつ
トランジスタ３８がOFFとなる。このトランジ
スタ３８がOFFとなるとNOT回路素子３９，４
１の出力が「０」になり、NOT回路素子４０の
出力は「１」となる。 Transistor 36 is turned on by inputting this output signal.
When this occurs, the photocoupler 37 is turned on and the transistor 38 is turned off. When this transistor 38 turns OFF, the NOT circuit elements 39, 4
1 becomes "0", and the output of NOT circuit element 40 becomes "1".
NOT回路素子４１の出力が「０」なのでトラ
ンジスタ４２がOFFとなり、このため比較器４
３の出力が「正」で、トランジスタ４４がONと
なり、リレー３１にダイオード３２を通して通電
される。 Since the output of the NOT circuit element 41 is "0", the transistor 42 is turned off, and therefore the comparator 4
3 is positive, the transistor 44 is turned on, and the relay 31 is energized through the diode 32.
これによつて、リレー３１の常閉接点３１ｂが
開となり、駆動回路１２への速度指令信号入力が
OFFとなる。 As a result, the normally closed contact 31b of the relay 31 is opened, and the speed command signal is input to the drive circuit 12.
It becomes OFF.
また、駆動回路１２は常閉接点３１ｂが開とな
り速度指令信号の入力が遮断されると上昇装置１
０を予め設定された低速で上昇させるよう構成さ
れている。これは、例えば駆動回路１２内に前記
速度指令信号の入力が遮断されたことを検知する
リレー又は検出回路とこれに接続された設定器を
用いれば達成できる。 Further, when the normally closed contact 31b is opened and the input of the speed command signal is cut off, the drive circuit 12
0 at a preset low speed. This can be achieved, for example, by using a relay or detection circuit in the drive circuit 12 that detects that the input of the speed command signal is cut off, and a setting device connected thereto.
したがつて、前述した様に低速用の比較器１８
が作動して常閉接点３１ｂが開となると、上昇装
置１０は駆動回路１２内に予め設定された低速で
溶接しながら溶接機本体７を上昇させる。 Therefore, as mentioned above, the low speed comparator 18
When the normally closed contact 31b is activated, the lifting device 10 raises the welding machine main body 7 while welding at a low speed preset in the drive circuit 12.
この駆動回路１２は入力電圧信号の値と極性と
により上昇装置１０に備えられたジエネレーター
１０ｂ付、スピードコンクロールモータ１０ａの
駆動方向及び速度をフイードバツク制御するもの
である。 This drive circuit 12 feedback-controls the drive direction and speed of a speed control motor 10a with a generator 10b provided in the lifting device 10 based on the value and polarity of the input voltage signal.
また、溶接機本体７には、溶接の終端部を検出
する終端部検出器３４が備えられており、溶接終
端部において停止し、予め設定された時間だけク
レータ処理を行なうよう駆動回路１２に制御信号
を出力する。 The welding machine main body 7 is also equipped with a terminal end detector 34 that detects the terminal end of welding, and controls the drive circuit 12 to stop at the terminal end of welding and perform crater treatment for a preset time. Output a signal.
ここで駆動回路１２の制御パターンは、溶接開
始時の位置決めの際の上昇、下降、終端部での停
止及び立向溶接実行中の増速、減速信号の可逆演
算で生成された速度指令信号による上昇及び低速
の制御を行なうものである。 Here, the control pattern of the drive circuit 12 is based on a speed command signal generated by reversible calculation of a rising, falling, and stopping at the end during positioning at the start of welding, and speed increasing and decelerating signals during vertical welding. This controls the rise and low speed.
この溶接装置による立向溶接開始時には、まず
溶接ナーチから溶接ワイヤを適正長さに突出させ
た状態で溶接機本体７を手動で降下させてワイヤ
４先端が母材１，２間の底部に取付けられたスタ
ートタブに接触しない状態で溶接電源１３を導通
させる。 When starting vertical welding with this welding device, first, the welding machine body 7 is manually lowered with the welding wire protruding to an appropriate length from the welding narch, and the tip of the wire 4 is attached to the bottom between the base metals 1 and 2. The welding power source 13 is made conductive without contacting the started tab.
このとき、可逆計数器２５内のカウント値は０
である。 At this time, the count value in the reversible counter 25 is 0.
It is.
最初、溶接ワイヤ４の先端が母材１，２の底部
に取付けられたスタ、トタブへの接触でアークが
発生して溶融が始まり徐々に溶接ワイヤ４の突出
量が短かくなり、検出器１４で検出される溶接電
流が徐々に増加し、Eout＞ＶIHとなると増速用
比較器１６が作動して可逆計数器２５がカウント
アツプを開始する。 At first, when the tip of the welding wire 4 comes into contact with the star and tab attached to the bottom of the base metals 1 and 2, an arc is generated and melting begins, and the protrusion amount of the welding wire 4 gradually becomes shorter, and the detector 14 The welding current detected at is gradually increased, and when Eout>V IH , the speed increasing comparator 16 is activated and the reversible counter 25 starts counting up.
この可逆計数器２５の出力値はDA変換器２７
でDA変換されたのち増幅器２８で最高速度設定
器３３に設定された値と掛け合わされた後、速度
指令信号として常閉接点３１ｂを通り駆動回路１
２に出力される。 The output value of this reversible counter 25 is transferred to the DA converter 27
After being converted from DA to the value set in the maximum speed setting device 33 by the amplifier 28, the signal is passed through the normally closed contact 31b as a speed command signal to the drive circuit 1.
2 is output.
速度指令信号の入力により駆動回路１２には上
昇装置１０をフイードバツク制御し、溶接機本体
７は徐々に増速しながら上昇される。 By inputting the speed command signal, the drive circuit 12 performs feedback control of the lifting device 10, and the welding machine main body 7 is lifted while gradually increasing the speed.
それ以後は第６図の特性に従つて、検出される
溶接電流ＩがＶIH＞ＶILの範囲にある時は比較器
１６，１７からのアツプ、ダウンカウントの入力
はなく、可逆計数器２５内のその時点での値に対
応する速度信号に基づいて溶接機本体７の定速で
の上昇が行なわれる。 After that, according to the characteristics shown in FIG. 6, when the detected welding current I is in the range of V IH > V IL , there is no up or down count input from the comparators 16 and 17, and the reversible counter 25 The welding machine main body 7 is raised at a constant speed based on the speed signal corresponding to the value at that point in time.
ここで、開先断面の変動もなく湯面上昇とトー
チ上昇がマツチングし、ワイヤヤ突出量も理想的
な状態であれば、前記定速での上昇が続く。 Here, if the rise in the melt level and the rise in the torch match without any fluctuation in the groove cross section, and if the amount of wire wire protrusion is also in an ideal state, the rise will continue at the constant speed.
また、溶接部分の開先断面の変動により溶接機
本体７の上昇速度が、溶融プール９の上昇速度に
比して早すぎ、溶接ワイヤ４のワイヤ突出長さが
長くなつている場合で、検出された値Eoutが
Eout＜ＶILとなつた場合には減速溶接機の比較
器１７が作動して可逆計数器２５内の値がダウン
カウントされて速度指令信号の値が小となり溶接
機本体７の上昇速度の減速制御を行う。 In addition, if the rising speed of the welding machine body 7 is too fast compared to the rising speed of the molten pool 9 due to fluctuations in the groove cross section of the welding part, and the wire protrusion length of the welding wire 4 becomes long, it may be detected. The value Eout is
When Eout<V IL , the comparator 17 of the deceleration welding machine is activated, the value in the reversible counter 25 is counted down, the value of the speed command signal becomes small, and the rising speed of the welding machine main body 7 is decelerated. Take control.
さらに溶接部分の開先断面の変動により溶接機
本体７の上昇速度が溶融プール９の上昇速度に比
して遅すぎるとワイヤ突出長さが小となり増幅
器１５の出力値EoutがEout＞ＶIHとなるとＶIH
が比較値として設定された増速用の比較器１６が
作動し溶接機本体７の上昇速度の増速制御を行な
う。 Furthermore, if the rising speed of the welding machine body 7 is too slow compared to the rising speed of the molten pool 9 due to fluctuations in the groove cross section of the welding part, the wire protrusion length becomes small and the output value Eout of the amplifier 15 becomes Eout>V IH . Then V IH
The comparator 16 for speed increase, in which is set as a comparison value, is activated to perform speed increase control of the rising speed of the welding machine main body 7.
なお、可逆計数器２５のダウンカウントにより
速度指令信号を下げ減速制御を行なつてもワイヤ
突出長さが長くなる場合でEout＜ＶILLの状態に
なつたとき、低速用の比較器１８が設定値ＶILL
で作動し、比較器１８の出力で低速制御回路２９
で作動し、常閉接点３１ｂが開状態とされる。 In addition, when the wire protrusion length becomes longer even if the speed command signal is lowered by down-counting the reversible counter 25 and deceleration control is performed, and the state of Eout<V ILL occurs, the low speed comparator 18 is set. Value V ILL
The low speed control circuit 29 is activated by the output of the comparator 18.
The normally closed contact 31b is opened.
このとき駆動回路１２内に設けられた低速用機
構が作動して駆動回路１２は、低速制御信号をモ
ータ１０ａに出力し、溶接機本体７の上昇速度を
低速に制御する。 At this time, a low-speed mechanism provided in the drive circuit 12 is activated, and the drive circuit 12 outputs a low-speed control signal to the motor 10a to control the rising speed of the welding machine body 7 to a low speed.
この後Eout＞ＶILLとなれば低速用の比較器１
８の出力は“０”で低速制御回路２９は作動を停
止し常閉接点３１ｂは再び閉状態で駆動回路１２
内の低速用機構は作動停止し、再び増速用及び減
速用の比較器１６，１７出力値の可逆演算による
溶接機本体の上昇速度の増減速制御が行なわれ
る。 After this, if Eout>V ILL , low speed comparator 1
The output of 8 is "0" and the low speed control circuit 29 stops operating, and the normally closed contact 31b is closed again and the drive circuit 12
The low speed mechanism in the welding machine stops operating, and the ascending speed of the welding machine main body is increased or decreased again by reversible calculation of the output values of the speed increasing and decelerating comparators 16 and 17.
このようにして、溶接機本体７の上昇速度を設
定値ＶIH，ＶIL，ＶILLと検出電流値Eoutとの比
較により停止させることなく制御して連続的に溶
接することができる。 In this way, the rising speed of the welding machine main body 7 can be controlled by comparing the set values V IH , V IL , V ILL with the detected current value Eout to perform continuous welding without stopping.
そして、溶接終了端に到達すると、終端部検出
器３４により終了端が検出され駆動回路１２は停
止となり上昇装置１０が停止される
ここで、予め設定されたタイマと電磁開閉器に
より溶接スイツチが２度目のONとなり溶接終了
端におけるクレータ処理が自動的に設定時間だけ
行なわれ、溶接が終了する。 When the welding end is reached, the welding end is detected by the end end detector 34, the drive circuit 12 is stopped, and the lifting device 10 is stopped.Here, the welding switch is turned 2 by a preset timer and an electromagnetic switch. When it turns on for the second time, crater treatment at the end of welding is automatically performed for the set time, and welding is completed.
この発明によるエレクトロガスアーク溶接機の
自動上昇装置の実施例は以上の通りであり、次に
述べる効果を挙げることができる。
The embodiments of the automatic lifting device for an electrogas arc welding machine according to the present invention are as described above, and the following effects can be achieved.
溶融プールの上昇速度と溶接機の上昇速度が一
致している場合には、ある一定速度で上昇し、開
先断面積の変動があつて溶融プールの上昇速度が
変化した場合でもワイヤ突出長さに反比例する溶
接電流Ｉを検出し、この溶接電流Ｉが予め設定さ
れた増速基準電流値又は減速基準電流値を上回り
又は下回ると、その時間に応じて順次出力される
増速又は減速パルス数による可逆演算により生成
される増減の程度が細かい速度指令信号により溶
接機本体の滑らかな上昇制御が行なえ、摺動ブロ
ツクの摺動性を確保しつつビード外観が良好でか
つ摺動ブロツクの急激な移動で溶融金属にひつか
き割れの生じることもないエレクトロガスアーク
溶接機の自動上昇装置となる。 If the rising speed of the molten pool and the rising speed of the welding machine match, the wire will rise at a constant speed, and even if the rising speed of the molten pool changes due to fluctuations in the groove cross-sectional area, the wire protrusion length will not change. A welding current I that is inversely proportional to is detected, and when this welding current I exceeds or falls below a preset acceleration reference current value or deceleration reference current value, the number of acceleration or deceleration pulses that are sequentially output according to the time. The welding machine main body can be smoothly raised by the speed command signal that is generated by reversible computation with a small degree of increase or decrease, and the welding machine body can be controlled to rise smoothly while ensuring the sliding properties of the sliding block. This is an automatic lifting device for electrogas arc welding machines that does not cause cracks in molten metal during movement.
第１図ａは本発明装置を適用するエレクトロガ
スアーク溶接機の説明図、ｂはこの発明の実施例
の構成を示す概要図、第２図は上昇駆動制御器の
構成を示すブロツク図、第３図は、比較部、基準
電圧設定器、可逆計数器の構成を示す回路図、第
４図は低速制御回路の回路図、第５図は、最高速
度設定器の構整を示す回路図、第６図はワイヤ突
出長さと溶接電流Ｉとの関係を示す説明図であ
る。
１，２…母材、３…溶接トーチ、４…溶接ワイ
ヤ、５…表当金、６…裏当金、７…溶接機本体、
８…溶接部、９…溶融プール、１０…上昇装置、
１１…上昇駆動制御器、１２…駆動回路、１３…
溶接電源、１４…検出器、１４ａ…シヤント、１
５…増幅器、１６…比較器、１７…比較器、１８
…比較器、１９…基準電流設定器、２０…可変抵
抗体、２１……可変抵抗体、２２…可変抵抗体、
２３…ゲート、２４…ゲート、２５…可逆計数
器、２６…基準発振器、２７…DA変換器、２８
…増幅器、２９…低速制御回路、３０…ラツチ回
路、３１ｂ…常閉接点、３２…ダイオード、３３
…最高速度範囲設定器、３４…終端部検出器。
FIG. 1a is an explanatory diagram of an electrogas arc welding machine to which the device of the present invention is applied, FIG. 1b is a schematic diagram showing the configuration of an embodiment of the present invention, FIG. The figure is a circuit diagram showing the configuration of the comparator, reference voltage setter, and reversible counter, Figure 4 is a circuit diagram of the low speed control circuit, Figure 5 is a circuit diagram showing the configuration of the maximum speed setter, FIG. 6 is an explanatory diagram showing the relationship between wire protrusion length and welding current I. 1, 2...Base metal, 3...Welding torch, 4...Welding wire, 5...Front metal, 6...Backing metal, 7...Welding machine main body,
8... Welding part, 9... Molten pool, 10... Climbing device,
11... Ascent drive controller, 12... Drive circuit, 13...
Welding power source, 14...detector, 14a...shunt, 1
5...Amplifier, 16...Comparator, 17...Comparator, 18
... Comparator, 19... Reference current setter, 20... Variable resistor, 21... Variable resistor, 22... Variable resistor,
23... Gate, 24... Gate, 25... Reversible counter, 26... Reference oscillator, 27... DA converter, 28
...Amplifier, 29...Low speed control circuit, 30...Latch circuit, 31b...Normally closed contact, 32...Diode, 33
...Maximum speed range setter, 34...Terminal end detector.
Claims (1)
ら摺動当金とトーチとを含む溶接機本体を外部入
力される速度指令信号に基づいて上昇させ、突き
合わせた母材間の立向上進溶接を行なうエレクト
ロガスアーク溶接機の自動上昇装置において 溶接電源に接続されて溶接電流値１を検出する
溶接電流検出部と、 所定の増速基準電流値と、当該増速基準電流値
よりも所定値だけ低い減速基準電流値と、さらに
当該減速基準電流値よりも所定値だけ低い低速基
準電流値が各々基準値として設定されると共に前
記溶接電流検出部の出力側に並列に接続された増
速用、減速用及び低速用の比較部とを備え、 これらの比較部は前記溶接電流値Ｉが前記増速
基準電流値を超えた場合には増速用比較部が、ま
た前記溶接電流値Ｉが前記減速基準電流値を下回
つた場合には減速用比較部が、さらに前記溶接電
流Ｉが前記低速基準電流値を下回つた場合には低
速用比較部が各々作動して信号を出力し、 さらに、基準クロツクを出力する基準発信器
と、 前記増速用及び減速用比較部からの出力信号を
入力し、前記基準発信器からの基準クロツクでゲ
ートして増速用及び減速用パルス信号を出力する
ゲート部と、 当該ゲート部からの前記両パルス信号を入力し
て増速用パルス信号をアツプカウントすると共に
減速用パルス信号をダウンカウントして速度指令
信号を生成し、前記駆動回路に出力する可逆計数
器と、 当該可逆数器と前記駆動回路とのライン間に挿
入して接続され、前記低速用比較部の出力信号を
入力すると開状態となる常閉接点とを備え、 当該常閉接点が開状態となると前記駆動回路は
減速で溶接機本体を上昇させるエレクトロガスア
ーク溶接機の自動上昇装置。[Claims] 1. While emitting an arc downward in a gaseous atmosphere, the welding machine body including the sliding butt and the torch is raised based on a speed command signal input externally, and the welding machine is moved between the butted base materials. In an automatic lifting device of an electrogas arc welding machine that performs stand-up advancement welding, a welding current detection section is connected to a welding power source and detects a welding current value 1, a predetermined speed-up reference current value, and the speed-up reference current value. A deceleration reference current value that is lower by a predetermined value than the deceleration reference current value and a low-speed reference current value that is further lower by a predetermined value than the deceleration reference current value are respectively set as reference values and are connected in parallel to the output side of the welding current detection section. Comparing parts for increasing speed, decelerating, and low speed are provided, and when the welding current value I exceeds the accelerating reference current value, the comparing part for increasing speed When the current value I falls below the deceleration reference current value, the deceleration comparison section operates, and when the welding current I falls below the low-speed reference current value, the low-speed comparison section operates to generate a signal. Further, output signals from a reference oscillator that outputs a reference clock and the speed increasing and decelerating comparison section are input, and gated by the reference clock from the reference oscillator, speed increasing and decelerating signals are input. a gate section that outputs a pulse signal for the purpose of the present invention, and inputs both of the pulse signals from the gate section to count up the pulse signal for speed increase and count down the pulse signal for deceleration to generate a speed command signal; A reversible counter that outputs to a drive circuit, and a normally closed contact that is inserted and connected between a line between the reversible counter and the drive circuit and becomes open when the output signal of the low-speed comparison section is input. , an automatic lifting device for an electrogas arc welding machine in which the drive circuit raises the welding machine body by decelerating when the normally closed contact is in an open state;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6749877A JPS542241A (en) | 1977-06-08 | 1977-06-08 | Automatic welding in vertical position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6749877A JPS542241A (en) | 1977-06-08 | 1977-06-08 | Automatic welding in vertical position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS542241A JPS542241A (en) | 1979-01-09 |
| JPS6139150B2 true JPS6139150B2 (en) | 1986-09-02 |
Family
ID=13346704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6749877A Granted JPS542241A (en) | 1977-06-08 | 1977-06-08 | Automatic welding in vertical position |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS542241A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5408055B2 (en) * | 2010-06-29 | 2014-02-05 | 新日鐵住金株式会社 | Manufacturing method of welded joint and welding apparatus for carrying out the method |
| CN105965127B (en) * | 2016-03-29 | 2018-10-30 | 唐山松下产业机器有限公司 | A kind of automatic soldering device and its control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4946554A (en) * | 1972-09-12 | 1974-05-04 |
-
1977
- 1977-06-08 JP JP6749877A patent/JPS542241A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4946554A (en) * | 1972-09-12 | 1974-05-04 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS542241A (en) | 1979-01-09 |
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