JPS58168475A - Arc welding method - Google Patents
Arc welding methodInfo
- Publication number
- JPS58168475A JPS58168475A JP5090582A JP5090582A JPS58168475A JP S58168475 A JPS58168475 A JP S58168475A JP 5090582 A JP5090582 A JP 5090582A JP 5090582 A JP5090582 A JP 5090582A JP S58168475 A JPS58168475 A JP S58168475A
- Authority
- JP
- Japan
- Prior art keywords
- current
- arc
- center
- welding
- groove
- 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.)
- Pending
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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/0216—Seam profiling, e.g. weaving, multilayer
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、溶接電流にパルス電流を付与し、かつアー
ク自身で開先を倣わせるアーク溶接方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an arc welding method in which a pulse current is applied to the welding current and the groove is traced by the arc itself.
電極を溶接線に対し幅方向に揺動させつつ溶接線方向に
移動して、被溶接物を溶接するに当シ、揺動によって生
ずるアーク電流またはアーク電圧の変化によって、電極
を開先に倣わせ開先を自動溶接するアーク溶接方法が知
られている。When welding a workpiece by moving the electrode in the direction of the welding line while swinging it in the width direction, the electrode follows the groove due to changes in arc current or arc voltage caused by the swinging. An arc welding method for automatically welding a skew groove is known.
一方、被溶接物に対する溶込みの改善を図るため、溶接
電流にパルス電流を用いてアーク溶接を行なう方法が知
られているが、上述したようにアークによシ開先を倣わ
せて溶接を行なうに当シ、揺動する電極が開先の幅方向
の中心または両端部に位置したときに上述したパルス電
流を付与して溶接を行なうと、前記パルス電流によシ溶
接電流に急激な変化が生じ、開先倣いが不能となる問題
があった。On the other hand, in order to improve the penetration into the workpiece, a method is known in which arc welding is performed using a pulsed current as the welding current. If welding is performed by applying the above-mentioned pulsed current when the oscillating electrode is positioned at the widthwise center or both ends of the groove, the pulsed current causes a sudden change in the welding current. There was a problem in that this caused the groove pattern to become impossible to follow.
この発明は、上述のような観点から、電極を溶接線に対
し幅方向に揺動させつつ溶接線方向に移動し、揺動する
電極が開先内における中心または両端部に位置したとき
にパルス電流を付与しながら溶接するに当シ、パルス電
流が作用しても確実にアーク電流またはアーク電圧の変
化による開先倣いを行なうことができるアーク情張方法
を提供するもので、
溶接トーチを開先幅方向に揺動させながら開先線方向に
移動させ、かつ揺動する溶接トーチが開先の中心または
両端部に位置したときにパルス電流を付与して溶接する
アーク溶接方法において、アーク電流またはアーク電圧
を検出し、前記検出されたアーク電流またはアーク電圧
の波形から前記パルス電流付与時の波形をカットし、前
記溶接トーチの揺動中心に対して、揺動の一方側半周期
と他方側半周期とのアーク電流またはアーク電圧を積分
し、前記積分値が互いに等しくなるように溶接トーチの
揺動中心を制御することに特徴を有するものである。From the above-mentioned viewpoint, this invention moves the electrode in the direction of the welding line while swinging it in the width direction with respect to the welding line, and generates a pulse when the swinging electrode is located at the center or both ends of the groove. This method provides an arc tensioning method that can reliably perform groove tracing by changing the arc current or arc voltage even when a pulse current is applied to weld while applying current. In an arc welding method in which the welding torch is moved in the direction of the groove line while swinging in the width direction of the groove, and when the swinging welding torch is positioned at the center or both ends of the groove, a pulsed current is applied to weld. Alternatively, detect the arc voltage, cut the waveform when the pulse current is applied from the waveform of the detected arc current or arc voltage, and cut the waveform at the time of applying the pulse current from the waveform of the detected arc current or arc voltage, and cut the waveform at the time of applying the pulse current, and then This method is characterized in that the arc current or arc voltage with respect to the side half cycle is integrated, and the center of oscillation of the welding torch is controlled so that the integrated values are equal to each other.
次に、この発明を実施例によシ図面と共に説明する。Next, the present invention will be explained based on examples and drawings.
第１図には、揺動中心が開先の中心にある基準溶接状態
を示す溶接トーチの作動説明図で、溶接トーチ１は被溶
接材２，３の開先４を、その幅方向にＡ−＋Ｂ−＋Ａ−
）Ｃ−Ａの順で一定振幅で揺動し、その揺動中心は、開
先４の中心４ａを指向している。５は消耗電極である。FIG. 1 is an explanatory diagram of the operation of the welding torch showing a standard welding state in which the center of oscillation is at the center of the groove, and the welding torch 1 moves the groove 4 of the welded materials 2 and 3 in the width direction of the groove 4. -+B-+A-
) It swings with a constant amplitude in the order of C-A, and the center of the swing is directed towards the center 4a of the groove 4. 5 is a consumable electrode.
このとき開先４の中心４ａの溶込みを、両端部４ｂ、４
ｃより深くさせるため、溶接トーチ１が「コ先４の中心
４ａに位置したときにパルス電流を付与すると、アーク
電流の波形は、第２図（イ）のようになる。At this time, the penetration of the center 4a of the groove 4 into both ends 4b, 4
If a pulse current is applied when the welding torch 1 is positioned at the center 4a of the tip 4 in order to make the welding depth deeper than c, the waveform of the arc current becomes as shown in FIG. 2 (a).
即ち第２図（イ）において、縦軸にアーク電流を、横軸
に揺動位置を示すと、アーク電流は溶接トーチ１のＡ→
Ｂ−４ｐＡ間の揺動と、Ａ→Ｃ→Ａ間の揺動の半周期毎
に等しい変化を示し溶接トーチがＡ点にあってパルス電
流■′が作用したときは、高い波形を示す。That is, in FIG. 2 (A), the vertical axis represents the arc current and the horizontal axis represents the swing position.
The fluctuation between B-4pA and the fluctuation between A→C→A show equal changes every half cycle, and when the welding torch is at point A and pulse current ■' is applied, a high waveform is shown.
しかるに、溶接トーチ１の揺動中心を、Ａ−）Ｂ→Ａの
間とＡ−）Ｃ−）Ａの間の電流波形の面積が等しくなる
ようにする開先倣い制御に当っては、・くルス電流、Ｉ
′の作用によって生ずるＡ点での高いア−り電流波形に
よって上述した倣い制御が乱される原因となる。However, in groove tracing control in which the center of oscillation of the welding torch 1 is set so that the areas of the current waveforms between A-)B→A and A-)C-)A are equal, Curse current, I
The high arc current waveform at point A caused by the action of ' causes the above-mentioned tracing control to be disturbed.
そこで、この発明においては、溶接トーチがＡ点に位置
しパルス電流■′が作用したときに生ずる高いアーク電
流を、後述する方法に・よって倣い制声の信号からカッ
トし、第２図（ロ）に示すような波形にするものである
。Therefore, in this invention, the high arc current that occurs when the welding torch is located at point A and the pulse current ) to create a waveform as shown in
第３図は溶接トーチ１の揺動中心Ａが、開先中心４ａよ
シ左方にずれたときの状態を示しており、このときのア
ーク電流は、第４図（イ）に示すようにＢ点が０点よシ
高い波形となる。そこでこのような波形を第２図（イ）
に示したようなり点と０点とが等しい波形となるように
倣い制御を行なうのであるが、パルス電流Ｉ′の作用に
よって生ずるＡ点での高いアーク電流がこの倣い制御を
乱すため、第４図（ロ）に示すように、前記Ａ点での高
いアーク電流を倣い制御信号からカットする。Figure 3 shows the situation when the center of oscillation A of the welding torch 1 is shifted to the left from the groove center 4a, and the arc current at this time is as shown in Figure 4 (a). The waveform is such that point B is higher than point 0. Therefore, such a waveform is shown in Figure 2 (a).
Tracing control is performed so that the waveform is equal to the zero point as shown in Figure 4. However, the high arc current at point A caused by the action of pulse current I' disturbs this tracing control. As shown in Figure (B), the high arc current at the point A is traced and cut from the control signal.
第５図（イ）は、開先４の両端部４ｂと４０においてパ
ルス電流Ｉ、、Ｉ２を作用させた場合における、揺動中
心が開先４の中心４ａを指向しているときの波形図で、
第５図（ロ）はこのときのノ々ルス電流１１＋■２をカ
ットした波形図である。FIG. 5(a) is a waveform diagram when the center of oscillation is directed toward the center 4a of the groove 4 when pulse currents I, , I2 are applied at both ends 4b and 40 of the groove 4. in,
FIG. 5(b) is a waveform diagram in which the Norse current 11+2 is cut.
また第６図（イ）は、第５図（イ）と同じく開先４の両
端部４ｂと４０においてパルス電流工、、Ｉ２を作用さ
せた場合における、揺動中心が開先４の中心４ａより左
方にずれたときの状態の波形図で、第６図（ロ）はこの
ときのパルス電流ＩＩ、Ｉ２をカットした波形図である
。In addition, FIG. 6(a) shows that the center of oscillation is the center 4a of the groove 4 when the pulse electric current I2 is applied at both ends 4b and 40 of the groove 4, as in FIG. 5(a). This is a waveform diagram of a state when the pulse current is shifted further to the left, and FIG. 6(b) is a waveform diagram in which the pulse currents II and I2 at this time are cut.
第７図には、この発明方法を実施するための倣い制御回
路の一例がブロック図によシ示されている。FIG. 7 shows a block diagram of an example of a copying control circuit for carrying out the method of the present invention.
６はアーク電流検出器、７はローノ（スフイルターで、
アーク電流検出器６によシ検出されたアーク電流信号は
ローパスフィルター７によってノイズが除去される。８
はアーク電流信号の平均値■。6 is an arc current detector, 7 is a rono (sfilter),
Noise is removed from the arc current signal detected by the arc current detector 6 by a low pass filter 7. 8
is the average value of the arc current signal■.
を形成させるための平滑器、９は差動増幅器で、差動増
幅器９においてアーク電流検出器６で検出されたアーク
電流値工と平滑器８からのアーク電流信号の平均値■。A smoother 9 is a differential amplifier for forming the average value of the arc current value detected by the arc current detector 6 and the arc current signal from the smoother 8 in the differential amplifier 9.
との差即ち揺動により生ずるアーク電流の変化およびパ
ルス電流Ｉ’、 ＩＩＩ Ｉ２の値が演算され、切換器
１１に送られる。The change in the arc current caused by the difference between the two values, that is, the fluctuation, and the values of the pulse currents I', III and I2 are calculated and sent to the switching device 11.
ｌＯはパルス電流■′またはＩ、、Ｉ２が発生する間を
示す信号で、この間に切換器１１を作動させ、されるよ
うになっている。1O is a signal indicating the period during which the pulse currents ■' or I, , I2 are generated, and the switch 11 is operated during this period.
１２は溶接トーチ１が揺動の中心を基準に開先の左側ま
たは右側に位置することを示す信号発生回路を有するト
リガ回路で、切換器１３を作動させ、揺動の半周期毎、
即ち揺動の左半分と右半分のアーク電流をメモリ付積分
器１４．１５に与える。Reference numeral 12 denotes a trigger circuit having a signal generating circuit indicating whether the welding torch 1 is located on the left or right side of the groove with respect to the center of oscillation, which activates the switch 13 and controls the welding torch 1 every half cycle of oscillation.
That is, the arc currents of the left half and right half of the oscillation are given to the memory-equipped integrators 14 and 15.
メモリ付積分器１４．１５では、揺動中心に対し左側と
右側の揺動半周期毎のアーク電流値の積分が行なわれる
。この積分により、ノイズによる誤動作のない高精度の
波形の比較が行なえる。The memory-equipped integrators 14 and 15 integrate arc current values for each half-cycle of the swing on the left and right sides of the center of swing. This integration allows highly accurate comparison of waveforms without malfunctions due to noise.
メモリ付積分器１４の出カー！ｆ写Ｉｄｔ（Ｔ： トー
チＯ
の１サイクル揺動時間、Ｉ：溶接電流）と、メモたよう
に両者間に差がちシ揺動中心Ａが左方のときは、溶接ト
ーチ１の開先幅方向に揺動中心Ａを制御する横軸モータ
１８の制御器１７にょシ横軸モータ１８を駆動させ、溶
接トーチ１の揺動中心を右方に修正する。また溶接トー
チ１の揺動中心が右方のときは、同様の作動によシその
揺動中心を左方に修正する。Output of integrator 14 with memory! f photo Idt (T: one cycle swing time of torch O, I: welding current), and as mentioned in the memo, there is a difference between the two.When the swing center A is to the left, the groove width of welding torch 1 The controller 17 of the horizontal shaft motor 18, which controls the swing center A in the direction, drives the horizontal shaft motor 18 to correct the swing center of the welding torch 1 to the right. Further, when the center of swing of the welding torch 1 is to the right, the center of swing of the welding torch 1 is corrected to the left by the same operation.
また、トリガ回路１２からの信号は、積分器１９に与え
られ、揺動１周期分のアーク電流積分値 Ｔ
ｉ １０Ｉｄｔ が基準値２０（即ち■。と同じ）と
比較器２１で比較され、制御器２２の制御信号により、
溶接トーチ１の高さを制御する室軸モータ２３を制御し
、溶接ビードの高さを均一なものとする。Further, the signal from the trigger circuit 12 is given to the integrator 19, and the arc current integral value T i 10Idt for one period of oscillation is compared with the reference value 20 (i.e., the same as ■) in the comparator 21, and the control By the control signal of the device 22,
A chamber shaft motor 23 that controls the height of the welding torch 1 is controlled to make the height of the weld bead uniform.
上述した実施例は、アーク電流によって制御する場合の
例について説明したが、アーク電流に替えアーク電圧に
よって制御するようにしてもよい。In the above-described embodiment, an example in which control is performed using arc current has been described, but control may be performed using arc voltage instead of arc current.
以上説明したように、この発明によれば、電極を溶接線
に対し幅方向に揺動させつつ溶接線方向に移動して被溶
接材を溶接するに当り、アーク電流にパルス電流を使用
しても、このパルス電流によシ制御が乱されることはな
く揺動によるアーク電流またはアーク電圧の変化によっ
て、適確に溶接トーチを開先に倣わせて溶接することが
でき。As explained above, according to the present invention, when welding materials by moving the electrode in the direction of the welding line while swinging it in the width direction with respect to the welding line, a pulsed current is used as the arc current. However, the pulse current does not disturb the welding control, and the welding torch can accurately follow the groove for welding by changing the arc current or arc voltage due to the oscillation.
−全な溶接部が得られる工業上優れた効果がもたらされ
る。- A superior industrial effect is achieved by obtaining a complete weld.
第１図は揺動中心が開先の中心にある基準溶接状態にお
ける溶接トーチの作動説明図、第２図（イ）は第１図の
状態においてパルス電流を開先中心に作用させたときの
アーク電流波形図、第２図（ロ）はこの発明によシパル
ス電流をカットしたときのアーク電流波形図、第３図は
揺動中心が開先の中心よシ左方にずれた溶接状態におけ
る溶接トーチの作動説明図、第４図（イ）は第３図の状
態においてパルス電流を開先中心に作用させたときのア
ーク電流波形図、第４図（ロ）はこの発明によシバルス
電流をカットしたときのアーク電流波形図、第５図（イ
）は第１図の状態でパルス電流を開先両端部に作用させ
たときのアーク電流波形図、第５図（ロ）はこの発明に
よシパルス電流をカットしたときのアーク電流波形図、
第６図（イ）は第３図の状態がパルス電流を開先両端部
に作用させたときのアーク電流波形図、第６図（ロ）は
この発明によシパルス電流をカットしたときのアーク電
流波形図、第７図はこの発明を実施するための倣い制御
回路の一例を示すブロック図である。図面において、
１・・・溶接トーチ、２，３・・・被溶接材、４・・・
開先、５・・・消耗電極、６・・・アーク電流検出器、
７・・・ローパスフィルター、８・・・平滑器、９・・
・差動増幅器、１０・・・パルス電流信号、１１・・・
切換器、１１′・・・アース、１２・・・トリガ回路、
１３・・・切換器、１４．１５・・・メモリ付積分器、
１６・・・差動増幅器、１７・・・横軸モータ制御器、
１８・・・横軸モータ、１９・・・積分器、２０・・・
基準値、２１・・・比較器、２２・・・制御器、２３・
・・室軸モータ。Figure 1 is an explanatory diagram of the operation of the welding torch in the standard welding condition where the center of oscillation is at the center of the groove, and Figure 2 (a) is an illustration of the operation of the welding torch when a pulse current is applied to the center of the groove in the condition shown in Figure 1. Figure 2 (b) is an arc current waveform diagram when the pulse current is cut according to the present invention, and Figure 3 is a diagram of the arc current waveform in a welding state where the center of oscillation is shifted to the left from the center of the groove. An explanatory diagram of the operation of the welding torch. Figure 4 (a) is an arc current waveform diagram when a pulse current is applied to the groove center in the state shown in Figure 3. Figure 4 (b) is a diagram of the arc current waveform when a pulse current is applied to the groove center in the state shown in Figure 3. Figure 5 (a) is an arc current waveform diagram when a pulse current is applied to both ends of the bevel in the state shown in Figure 1, and Figure 5 (b) is a diagram of the arc current waveform when the groove is cut. Arc current waveform diagram when the passive pulse current is cut,
Fig. 6 (a) is an arc current waveform diagram when the pulse current is applied to both ends of the groove in the state shown in Fig. 3, and Fig. 6 (b) is an arc current waveform diagram when the pulse current is cut according to the present invention. The current waveform diagram and FIG. 7 are block diagrams showing an example of a copying control circuit for carrying out the present invention. In the drawings, 1... Welding torch, 2, 3... Material to be welded, 4...
Groove, 5... Consumable electrode, 6... Arc current detector,
7...Low pass filter, 8...Smoother, 9...
・Differential amplifier, 10... Pulse current signal, 11...
Switch, 11'... Earth, 12... Trigger circuit,
13...Switcher, 14.15...Integrator with memory, 16...Differential amplifier, 17...Horizontal axis motor controller,
18...Horizontal axis motor, 19...Integrator, 20...
Reference value, 21... Comparator, 22... Controller, 23.
...Room shaft motor.
Claims (1)
移動させ、かつ揺動する溶接トーチが開先の中心または
両端部に位置したときにパルス電流を付与して溶接する
アーク溶接方法において、アーク電流またはアーク電圧
を検出し、前記検出されたアーク電流またはアーク電圧
の波形から前記パルス電流付与時の波形をカットし、前
記溶接トーチの揺動中心に対して、揺動の一方側半周期
と他方側半周期とのアーク電流またはアーク電圧を積分
し、前記積分値が互いに等しくなるように溶接トーチの
揺動中心を制御することを特徴とするアーク溶接方法。An arc welding method in which the welding torch is moved in the groove line direction while swinging in the groove width direction, and when the swinging welding torch is positioned at the center or both ends of the groove, a pulsed current is applied for welding. , the arc current or arc voltage is detected, the waveform when the pulse current is applied is cut from the waveform of the detected arc current or arc voltage, and one side of the welding torch is oscillated relative to the oscillation center of the welding torch. An arc welding method comprising integrating arc current or arc voltage between one half cycle and the other half cycle, and controlling the center of oscillation of a welding torch so that the integrated values are equal to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5090582A JPS58168475A (en) | 1982-03-31 | 1982-03-31 | Arc welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5090582A JPS58168475A (en) | 1982-03-31 | 1982-03-31 | Arc welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58168475A true JPS58168475A (en) | 1983-10-04 |
Family
ID=12871769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5090582A Pending JPS58168475A (en) | 1982-03-31 | 1982-03-31 | Arc welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168475A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60174269A (en) * | 1984-02-17 | 1985-09-07 | Nippon Kokan Kk <Nkk> | Method for controlling profiling in welding under current change |
| JP2004082152A (en) * | 2002-08-26 | 2004-03-18 | Daihen Corp | Profiling control method of pulsed arc welding |
| EP3508296A3 (en) * | 2017-11-29 | 2020-01-15 | Lincoln Global, Inc. | Systems and methods for welding torch weaving |
| US11897060B2 (en) | 2017-11-29 | 2024-02-13 | Lincoln Global, Inc. | Systems and methods for welding torch weaving |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5411055A (en) * | 1977-06-28 | 1979-01-26 | Osaka Transformer Co Ltd | Method and apparatus for automatic arc welding using nonconsumable wlwctrode |
-
1982
- 1982-03-31 JP JP5090582A patent/JPS58168475A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5411055A (en) * | 1977-06-28 | 1979-01-26 | Osaka Transformer Co Ltd | Method and apparatus for automatic arc welding using nonconsumable wlwctrode |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60174269A (en) * | 1984-02-17 | 1985-09-07 | Nippon Kokan Kk <Nkk> | Method for controlling profiling in welding under current change |
| JP2004082152A (en) * | 2002-08-26 | 2004-03-18 | Daihen Corp | Profiling control method of pulsed arc welding |
| JP4515018B2 (en) * | 2002-08-26 | 2010-07-28 | 株式会社ダイヘン | Scanning control method of pulse arc welding |
| EP3508296A3 (en) * | 2017-11-29 | 2020-01-15 | Lincoln Global, Inc. | Systems and methods for welding torch weaving |
| EP3744459A1 (en) * | 2017-11-29 | 2020-12-02 | Lincoln Global, Inc. | Systems and methods for welding torch weaving |
| US11065707B2 (en) | 2017-11-29 | 2021-07-20 | Lincoln Global, Inc. | Systems and methods supporting predictive and preventative maintenance |
| US11548088B2 (en) | 2017-11-29 | 2023-01-10 | Lincoln Global, Inc. | Systems and methods for welding torch weaving |
| US11623294B2 (en) | 2017-11-29 | 2023-04-11 | Lincoln Global, Inc. | Methods and systems using a smart torch with positional tracking in robotic welding |
| US11897060B2 (en) | 2017-11-29 | 2024-02-13 | Lincoln Global, Inc. | Systems and methods for welding torch weaving |
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