JPS596746B2 - Bead termination device for consumable electrode type arc welding machine - Google Patents

Description

【発明の詳細な説明】 本発明は消耗電極式アーク溶接機におけるビード終端処
理装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bead termination device for a consumable electrode type arc welding machine.

従来、この種溶接機において、ビード終端の電流値、及
びそれを流す時間を適宜に設定することによつてクレー
タの発生が防止されることは既に知られている。Conventionally, in this type of welding machine, it is already known that the generation of craters can be prevented by appropriately setting the current value at the end of the bead and the time for which it flows.

しかしながら母材の材質、肉厚、溶接部位等に応じて溶
接電流及び電圧、トーチの移送速度を変えたとき、これ
らに対応してビード終端の電流値、それを流す時間を設
定し直さなければならず、その設定に多くの手数を要す
るばかりでな＜、設定の誤りによつてクレータが生ずる
こともある等の不都合があつた。本発明はかゝる不都合
のないビード終端処理装置を提供することを目的とする
もので、外部電源を、出力調整装置を介して母材とトー
チとに接続すると共に送給速度調整装置を介して溶接ワ
イヤの送給用モータに接続し、更に、トーチの移送用モ
ータを外部電源に接続する回路に移送速度調整装置を備
えるものにおいて、前記出力調整装置及び送給速度調整
装置に、電源にスイッチを介して接続され可動子から設
定信号を出力する可変抵抗器を有する通常溶接時の設定
器と、該電源に接続されトーチの停止時、前記スイッチ
が開路したとき可動子が前記可変抵抗器に接続される可
変抵抗器からなる、通常溶接時に対して前記出力調整装
置及び送給速度調整装置の出力が数１０％降下するビー
ド終端処理設定器とを設け、更に前記トーチに移送速度
検出器を備えると共に該トーチの停止時からその停止前
の出力信号に反比例した時間長さの後に作動し、前記出
力調整装置及び送給速度調整装置の外部電源を遮断する
タイマを設けたことを特徴とする。However, when the welding current, voltage, and torch transfer speed are changed depending on the base metal material, wall thickness, welding location, etc., the current value at the end of the bead and the time for which it flows must be reset accordingly. Not only does it take a lot of effort to set it up, but it also has some inconveniences, such as the possibility of creating craters due to incorrect settings. It is an object of the present invention to provide a bead termination treatment device free from such inconveniences, in which an external power source is connected to the base material and the torch through an output adjustment device, and a feed speed adjustment device is used to connect the external power source to the base material and the torch. A transfer speed adjusting device is provided in the circuit that connects the welding wire feeding motor to the welding wire feeding motor, and further connects the torch transferring motor to an external power source, wherein the output adjusting device and the feeding speed adjusting device are connected to the power source. A setting device for normal welding, which has a variable resistor that is connected via a switch and outputs a setting signal from the movable element; and a setting device that is connected to the power source and has a variable resistor that outputs a setting signal from the movable element when the torch is stopped and the movable element is connected to the variable resistor when the switch is opened. A bead termination setting device is provided, which reduces the output of the output adjustment device and the feed speed adjustment device by several tens of percent compared to normal welding, which is a variable resistor connected to the torch, and a transfer speed detector is provided on the torch. and a timer that operates after a period of time inversely proportional to the output signal from when the torch stops until it stops, and shuts off the external power source of the output adjustment device and the feed speed adjustment device. do.

次に本発明の実施例を別紙図面について説明する。Next, embodiments of the present invention will be described with reference to the attached drawings.

第１図に）いて、１は外部電源を示し、該外部電源１は
出力調整装置２を介して母材３とトーチ４とに接続する
と共に、送給速度調整装置５を介して溶接ワイヤ６の供
給用モータ７に接続した。1), reference numeral 1 indicates an external power source, which is connected to the base material 3 and the torch 4 via an output adjustment device 2, and the welding wire 6 via a feed speed adjustment device 5. It was connected to the supply motor 7.

８はトーチ４の走行台車、９はその駆動モータを示し、
該モータ９は外部電源１０に移送速度調整装置１１を介
して接続した。8 is a running trolley for the torch 4, 9 is its drive motor,
The motor 9 was connected to an external power source 10 via a transfer speed adjustment device 11.

前記出力調整装置２及び送給速度調整装置５は通常の溶
接時の設定器２ａ，５ａとこれら調整装置２，５の出力
が通常溶接時の出力に対して数１０％降下するビード終
端設定器１２が設けられている。前記移送速度調整装置
１１は移送速度設定器１４が設けられている。The output adjusting device 2 and the feeding speed adjusting device 5 are setters 2a and 5a during normal welding, and bead end setting devices in which the output of these adjusting devices 2 and 5 is several tens of percent lower than the output during normal welding. 12 are provided. The transfer speed adjusting device 11 is provided with a transfer speed setting device 14 .

出力調整装置２、送給速度調整装置５及び移送速度調整
装置１１は、第２図示のようにトランス１５とその出力
回路に介入した２個のサイリスタ１６，１７と両サイリ
スタ１６，１ｒを点弧する点弧パルスシエネレータ１８
とからなり、その入力端子１８ａ，１８ｂに加えられる
電圧値に応じた点弧角が与えられ、それに応じた出力が
出力端子１９ａ，１９ｂに得られる。The output adjustment device 2, the feeding speed adjustment device 5, and the transfer speed adjustment device 11 ignite the transformer 15 and the two thyristors 16, 17 and both thyristors 16, 1r interposed in the output circuit as shown in the second diagram. ignition pulse generator 18
A firing angle corresponding to the voltage value applied to the input terminals 18a, 18b is given, and an output corresponding to the firing angle is obtained at the output terminals 19a, 19b.

各設定器２ａ，５ａ及び１４は第１図示のように構成し
た。Each setting device 2a, 5a, and 14 was constructed as shown in the first figure.

即ち、電源２０の一端子２０ａを並列の複数のスイッチ
２１ａ，２１ｂ，２１ｃ及びこれら各スイッチ２１ａ，
２１ｂ，２１ｃに直列の可変抵抗器２２ａ，２２ｂ，２
２ｃを介して供通に他端子２０ｂに接続し、各可変抵抗
器２２ａ，２２ｂ，２２ｃの可動子２２ｄをダイオード
２３を介して前記入力端子１８ａに接続し、電源２０の
他端子２０ｂを前記入力端子１８ｂに接続した。各設定
器２ａ，５ａ及び１４は電源２０を開路する停止スイッ
チ２５，２６，２７を有し、これらスイッチ２５，２６
，２７はトーチ４の停止信号で開路する。更に各設定器
２ａ，５ａ及び１４のスイッチ２１ａ，２１ｂ，２１ｃ
の対応する番号のものは図示しないが互に連動して閉じ
られる。That is, one terminal 20a of the power supply 20 is connected to a plurality of parallel switches 21a, 21b, 21c and each of these switches 21a,
Variable resistors 22a, 22b, 2 in series with 21b, 21c
2c, the movable elements 22d of each variable resistor 22a, 22b, 22c are connected to the input terminal 18a via the diode 23, and the other terminal 20b of the power source 20 is connected to the input terminal 20b. It was connected to terminal 18b. Each setting device 2a, 5a and 14 has a stop switch 25, 26, 27 that opens the power supply 20, and these switches 25, 26
, 27 are opened at the stop signal of the torch 4. Further, switches 21a, 21b, 21c of each setting device 2a, 5a and 14
Although those with corresponding numbers are not shown, they are closed in conjunction with each other.

前記ビード終端設定器１２は前記設定器２ａ，５ａの電
源２０に設けた。The bead end setting device 12 was provided in the power source 20 of the setting devices 2a and 5a.

即ち、ビード終端処理定器１２，１２を可変抵抗とし、
これらを各電源２０の出力端子２０ａ，２０ｂ間に接続
すると共に、各スイッチ２５，２６にその開路時に閉じ
られる接点３０ａ，３０ａを設け、この接点３０ａ，３
０ａを夫々前記各可変抵抗１２の可動子１２ａに接続し
た。かくて、各可動子１２ａ，１２ａを調整して各接点
３０ａ，３０ａに得られる電圧が各出力端子２０ａに得
られる電圧の６０〜７０％になるように設定する。３２
はトーチ４の１駆動用モータ９の入力端子に接続したト
ーチ４の走行速度検出器で、電圧検出器からなり、その
出力端子は減算回路３３を介してタイマ３５に接続した
。That is, the bead termination process regulators 12, 12 are variable resistances,
These are connected between the output terminals 20a, 20b of each power source 20, and each switch 25, 26 is provided with a contact 30a, 30a that is closed when the switch is opened.
0a was connected to the movable element 12a of each variable resistor 12, respectively. Thus, each movable element 12a, 12a is adjusted so that the voltage obtained at each contact 30a, 30a is set to be 60 to 70% of the voltage obtained at each output terminal 20a. 32
is a running speed detector of the torch 4 connected to the input terminal of the first drive motor 9 of the torch 4, which is composed of a voltage detector, and its output terminal is connected to the timer 35 via the subtraction circuit 33.

該減算回路３３は設定器３５から加わる電圧ＥＴから走
行速度検出器３２の出力ＥＭを減算し、トーチ４の速度
に逆比例した信号Ｅｔを出力する。The subtraction circuit 33 subtracts the output EM of the running speed detector 32 from the voltage ET applied from the setting device 35, and outputs a signal Et inversely proportional to the speed of the torch 4.

タイマ３５は前記外部電源１を調整装置２，５に共通に
接続する回路に介入した接点３５ａを有し、その入力Ｅ
ｔに対応した時間の後にその接点３５ａを開く。３４は
検出器３２と減算回路３３との間に介在させた剰算器で
、検出器３２の出力ＥＭに係数信号発生器３１から係数
信号Ｋを剰算してタイマ３５の作動時間が調整できるよ
うにした。The timer 35 has a contact 35a inserted into the circuit connecting the external power supply 1 to the regulating devices 2, 5 in common, and whose input E
Its contact 35a is opened after a time corresponding to t. 34 is a multiplier interposed between the detector 32 and the subtraction circuit 33, which can adjust the operating time of the timer 35 by multiplying the output EM of the detector 32 by the coefficient signal K from the coefficient signal generator 31. I did it like that.

３８は前記接点３５ａに並列に設けたスイッチで、トー
チ４の走行指令信号で他のスイッチ２５，２６，２７と
共に閉じられる。A switch 38 is provided in parallel with the contact 35a, and is closed together with the other switches 25, 26, and 27 in response to a travel command signal from the torch 4.

次にその作動について説明する。Next, its operation will be explained.

今、トーチ４の移送速度調整装置１１の設定器１４の各
可変抵ＴＬ，２２ａ，２２ｂ，２２Ｃの可動子２２ｄを
して各走行速度を設定すると共に、これら各速度に合せ
て出力調整装置２及び送給速度調整装置５の設定器２ａ
，５ａの各可変抵抗２２ａ，２２ｂ，２２ｃの各可動子
２２ｄをして溶接電流及び溶接ワイヤ６の供給速度を設
定し、次で、各スイッチ２１ａ，２１ａ，２１ａを閉じ
てトーチ４の１速を選択する。Now, the mover 22d of each variable resistor TL, 22a, 22b, 22C of the setting device 14 of the transfer speed adjustment device 11 of the torch 4 is used to set each traveling speed, and the output adjustment device 2 and a setting device 2a of the feeding speed adjustment device 5
, 5a of the variable resistors 22a, 22b, 22c to set the welding current and the supply speed of the welding wire 6, and then close the switches 21a, 21a, 21a to set the torch 4 to 1st speed. Select.

かくて、トーチ４の走行指令信号が入つて来ると、スイ
ッチ２５，２６，２７，３８が閉じられ、スイッチ３０
，３０は開らかれて、トーチ４の走行が開始されると共
に、設定した溶接電流、溶接ワイヤ６の供給速度が与え
られて所望のビード幅の溶接が行なわれる。このとき走
行速度検出器３２はトーチ４の走行速度を検出し、その
出力ＥＭに剰算器３４において係数Ｋ（０くＫく１）が
剰算せられ、減算器３３に卦いて減算が行なわれてＥｔ
＝ＥＴ−ＫＥＭが出力され、これによりタイマ３５は作
動してその接点３５ａを閉じている。次で、トーチ４の
停止信号が入つて来るとスイツチ２５，２６，２７が一
斉に開らかれ接点３０ａ，３０ａが閉じられ、トーチ４
が停止する。Thus, when the torch 4 travel command signal is received, the switches 25, 26, 27, and 38 are closed, and the switch 30 is closed.
, 30 are opened and the torch 4 starts running, and the set welding current and welding wire 6 supply speed are applied to perform welding with a desired bead width. At this time, the running speed detector 32 detects the running speed of the torch 4, and the output EM is multiplied by a coefficient K (0 x K x 1) in the multiplier 34, and subtracted in the subtracter 33. Tete Et
=ET-KEM is output, which causes the timer 35 to operate and close its contact 35a. Next, when the stop signal for the torch 4 is received, the switches 25, 26 and 27 are opened all at once, the contacts 30a and 30a are closed, and the torch 4
stops.

その出力電圧はビード終端電圧設定器１２に卦いて各設
定器２ａ，５ａの出力電圧の６０〜７０％の出力電圧に
変換されてスイッチ３０，３０を各介して各設定器２ａ
，５ａに加えられる。The output voltage is converted to an output voltage of 60 to 70% of the output voltage of each setting device 2a, 5a by the bead termination voltage setting device 12, and then passing through the switches 30, 30 to each setting device 2a.
, 5a.

かくて出力調整器２及び送給速度調整器５に通常溶接時
の６０〜７０％の設定信号が加わり、溶接電流及び溶接
ワイヤ６の供給速度は通常溶接時の６０〜７０％となる
。そして、タイマ３５はトーチ４が停止した瞬間に卦け
る減算器３３の出力Ｅｔに応じた時間作動を継続して不
作動となり、接点３５ａを開いてビード終端の処理を完
了する。In this way, a setting signal of 60 to 70% of the normal welding is applied to the output regulator 2 and the feed speed regulator 5, and the welding current and the supply speed of the welding wire 6 become 60 to 70% of the normal welding. Then, the timer 35 continues to operate for a time corresponding to the output Et of the subtracter 33, which is calculated at the moment the torch 4 stops, and becomes inactive, and the contact 35a is opened to complete the bead termination process.

尚、ここで減算器３３の意義について説明する。Note that the significance of the subtracter 33 will be explained here.

走行速度検出器３２の出力ＥＭはトーチ４の走行速度に
比例し、アークによる母材３に対する入熱幅はトーチ４
の走行速度に逆比例することは知られている。そして、
数１０％降下したビード終端電流をかける時間も走行速
度に逆比例した時間とすることが好ましいことも知られ
ている。減算器３３はこの逆比例した時間を算出するた
めのもので、第３図に示すような傾斜をもつた特性とな
り、トーチ４が停止した時点に訃ける減算器の出力電圧
Ｅｔに応じた時間、タイマ３５の作動が継続して不作動
となり、その接点３５ａを開く。即ち、トーチ速度に反
比例した時間後に接点３５ａが開らかれてそのビードに
合つたビード端末の正しい処理が行なわれ、クレータが
生じない。また、他の各スイッチ２１ｂ，２１ｂ，２１
ｂを閉じて走行指令信号により各スイッチ２５，２６，
２７を閉じて他の１速で溶接を行ない、停止指令信号で
トー゛チ４を停止するとビード端末処理電流は溶接電流
の６０〜７０％となると共にその走行速度に逆比例した
時間後に接点３５ａが開らかれてビード処理電流の供給
は停止されてビード端末の処理が完了する。The output EM of the traveling speed detector 32 is proportional to the traveling speed of the torch 4, and the heat input width to the base material 3 due to the arc is proportional to the traveling speed of the torch 4.
It is known that it is inversely proportional to the running speed. and,
It is also known that it is preferable that the time for applying the bead terminal current, which has dropped by several tens of percent, is inversely proportional to the running speed. The subtractor 33 is used to calculate this inversely proportional time, and has a characteristic with a slope as shown in FIG. , the timer 35 continues to operate and becomes inactive, opening its contact 35a. That is, after a time inversely proportional to the torch speed, contact 35a is opened to ensure proper processing of the bead end that matches the bead, and no cratering occurs. In addition, each of the other switches 21b, 21b, 21
b is closed and each switch 25, 26,
27 is closed and welding is performed at the other first speed, and when the torch 4 is stopped by the stop command signal, the bead end processing current becomes 60 to 70% of the welding current, and after a time inversely proportional to the running speed, the contact 35a is closed. is opened, the supply of bead processing current is stopped, and the processing of the bead terminal is completed.

尚、第１図の実施例において介設定器２ａ，５ａの電源
２０を各別に設けたがこれらを共通１個のものとするこ
とが出来ることは当然である。Incidentally, in the embodiment shown in FIG. 1, the power supplies 20 for the setting devices 2a and 5a are provided separately, but it goes without saying that they can be made into one common power source.

また、この場合、第１図に卦けるようにビード終端処理
設定器１２を各別に設けることも出来るが、共通１個の
ものとすることが出来ることは当然である。このように
本発明によるときは、各速を適宜に選択するも、その溶
接電流に応じたビード端末処理電流と、その処理時間と
力咄動的に与えられて常に正しいビード端末処理が行な
われ、従来装置のように速度の設定毎にビード端末処理
電流及びその処理時間を設定する手数を要することなく
、クレータが生ずることも無い等の効果がある。Further, in this case, as shown in FIG. 1, the bead termination setting device 12 can be provided separately, but it goes without saying that one common device can be provided. In this way, according to the present invention, although each speed is appropriately selected, the bead end treatment current is dynamically given according to the welding current, the processing time, and the force are dynamically applied, so that the correct bead end treatment is always performed. Unlike conventional devices, there is no need to set the bead end processing current and processing time for each speed setting, and there are advantages such as no craters are generated.

また可変抵抗からなるビード終端処理設定器を通常溶接
時の設定器に単に付加するだけでよいので構成が非常に
簡単になる効果を有する。In addition, since it is sufficient to simply add a bead termination setting device made of a variable resistor to a setting device used in normal welding, the configuration is very simple.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の実施例を示すもので、第１図は全体の回
路図、第２図はその一部の回路図、第３図は一部の特性
線図である。 １・・・・・・外部電源、２・・・・・・出力調整装置
、３・・・・・・母材、４・・・・・・トーチ、５・・
・・・・送給速度調整装置、６・・・・・・溶接ワイヤ
、７・・・・・・送給用モータ、９・・・・・・トーチ
移送用モータ、１０・・・・・・外部電源、２ａ．５ａ
，１４・・・・・・設定器、１２・・・・・・ビード端
末処理設定器、３２・・・・・・移送速度検出器、３５
・・・・・・タイマ。The drawings show an embodiment of the present invention; FIG. 1 is an overall circuit diagram, FIG. 2 is a partial circuit diagram, and FIG. 3 is a partial characteristic diagram. 1... External power supply, 2... Output adjustment device, 3... Base material, 4... Torch, 5...
...Feeding speed adjustment device, 6... Welding wire, 7... Feeding motor, 9... Torch transfer motor, 10... - External power supply, 2a. 5a
, 14... Setting device, 12... Bead terminal processing setting device, 32... Transfer speed detector, 35
...Timer.

Claims (1)

【特許請求の範囲】[Claims] １ 外部電源を、出力調整装置を介して母材とトーチと
に接続すると共に送給速度調整装置を介して溶接ワイヤ
の送給用モータに接続し、更に、トーチの移送用モータ
を外部電源に接続する回路に移送速度調整装置を備える
ものにおいて、前記出力調整装置及び送給速度調整装置
に、電源にスイッチを介して接続され可動子から設定信
号を出力する可変抵抗器を有する通常溶接時の設定器と
、該電源に接続されトーチの停止時、前記スイッチが開
路したとき可動子が前記可変抵抗器に接続される可変抵
抗器からなる、通常溶接時に対して前記出力調整装置及
び送給速度調整装置の出力が数１０％降下するビード終
端処理設定器とを設け、更に前記トーチに移送速度検出
器を備えると共に該トーチの停止時からその停止前の出
力信号に反比例した時間長さの後に作動し、前記出力調
整装置及び送給速度調整装置の外部電源を遮断するタイ
マを設けたことを特徴とする消耗電極式アーク溶接機に
おけるビード終端処理装置。1. Connect an external power source to the base material and the torch via an output adjustment device, connect it to a welding wire feeding motor via a feeding speed adjustment device, and connect the torch transfer motor to the external power source. In the case where the connected circuit is equipped with a transfer speed adjustment device, the output adjustment device and the feed speed adjustment device have a variable resistor that is connected to the power source via a switch and outputs a setting signal from the movable element during normal welding. and a variable resistor connected to the power supply and whose movable element is connected to the variable resistor when the switch is opened when the torch is stopped, and the output adjustment device and the feed speed for normal welding. a bead termination setting device in which the output of the regulating device drops by several tens of percent, and further comprising a transfer speed detector on the torch and after a period of time inversely proportional to the output signal from the time of stopping the torch before stopping. A bead termination processing device for a consumable electrode type arc welding machine, characterized in that a timer is provided to operate and cut off external power to the output adjustment device and the feed speed adjustment device.