JPH06106349A - Consumable electrode type arc controller - Google Patents

Consumable electrode type arc controller

Info

Publication number
JPH06106349A
JPH06106349A JP25604292A JP25604292A JPH06106349A JP H06106349 A JPH06106349 A JP H06106349A JP 25604292 A JP25604292 A JP 25604292A JP 25604292 A JP25604292 A JP 25604292A JP H06106349 A JPH06106349 A JP H06106349A
Authority
JP
Japan
Prior art keywords
welding
current
wire
feeding speed
value
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.)
Granted
Application number
JP25604292A
Other languages
Japanese (ja)
Other versions
JP2541733B2 (en
Inventor
Tokuji Maruyama
徳治 丸山
Masashi Okada
雅志 岡田
Yukio Toida
幸雄 樋田
Masahiro Honma
正浩 本間
Eiichi Sato
英市 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP4256042A priority Critical patent/JP2541733B2/en
Publication of JPH06106349A publication Critical patent/JPH06106349A/en
Application granted granted Critical
Publication of JP2541733B2 publication Critical patent/JP2541733B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To quickly obtain a current detection value which coincides with a welding set value by deriving a wire feed speed reference portion, based on the output signal of a current setting device, joining both of them together and outputting as the commanding value of a wire feed speed, and feeding a welding wire to a welding base metal at the feeding speed instructed by this commanding value. CONSTITUTION:A control means calculates a wire feeding speed fluctuation portion so that a current detection value coincides with a current set value, based on the difference of outputs of a current detector 15 and a current setting device 19. On the other hand, in the case the current setting value is fluctuated, by its new current setting value, the optimal wire feeding speed is derived from the relation of the wire feeding speed and the current set value derived in advance, and it becomes a wire feeding speed reference portion. Subsequently, the control means joins together this wire feeding speed reference portion and the wire feeding speed fluctuation portion and outputs them as the commanding value of the wire feeding speed, and a driving means feeds a wire 13 to a welding base metal 14, based on this commanding value, and allows a welding current to coincide with a desired set value.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は消耗電極式アーク溶接制
御装置に関し、特に溶接電流の変動をワイヤ送給速度の
調整により吸収して溶接電流を所定の設定値に制御する
消耗電極式アーク溶接制御装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a consumable electrode type arc welding control device, and more particularly to a consumable electrode type arc welding system which absorbs fluctuations in welding current by adjusting the wire feeding speed and controls the welding current to a predetermined set value. Regarding the control device.

【0002】[0002]

【従来の技術】従来の消耗電極式アーク溶接機におい
て、出力電流の設定値と、出力電流の検出値との差信号
を積分した信号によりワイヤ送給速度を決定する制御回
路を備えたものがある(特公平3−30468号)。図
7はこの従来のアーク溶接機制御装置を示すブロック図
である。消耗電極式溶接ワイヤ3がローラ4により駆動
されてコンタクトチップ2に向けて送給される。このコ
ンタクトチップ2を挿通したワイヤ3の先端と溶接母材
6との間でアークが発生し、溶接母材6が溶接される。
2. Description of the Related Art A conventional consumable electrode type arc welding machine is provided with a control circuit for determining a wire feeding speed by a signal obtained by integrating a difference signal between a set value of output current and a detected value of output current. Yes (Japanese Patent Publication No. 3-30468). FIG. 7 is a block diagram showing this conventional arc welding machine control device. The consumable electrode type welding wire 3 is driven by the roller 4 and fed toward the contact tip 2. An arc is generated between the tip of the wire 3 inserted through the contact tip 2 and the welding base material 6, and the welding base material 6 is welded.

【0003】コンタクトチップ2と溶接母材6との間に
は、溶接電源1が接続されており、この溶接電源1によ
り所定の電圧の溶接電流がチップ2と溶接母材6との間
に供給される。溶接電流設定器10は溶接電流を設定す
るためのものであり、設定器10から入力された溶接電
流設定値は、電圧設定器(図示せず)からの電圧設定値
と共に電流電圧制御回路8に入力され、この電流電圧制
御回路8から電源1に溶接電圧の指令値が出力される。
電流設定器10の出力は比較器9にも入力され、更に溶
接母材6と電源1との間に接続された電流検出器7によ
り検出された溶接電流の検出値が比較器9に入力され
る。そして、この比較器9は溶接電流の検出値と設定値
との差分をとり、この差分を積分することにより、検出
値と設定値との差分の積分信号を出力する。この比較器
9の出力はワイヤ送給モータ5に入力され、モータ5は
この積分信号による送給速度に基づいてワイヤを送給す
べくローラ4を駆動する。
A welding power supply 1 is connected between the contact tip 2 and the welding base metal 6, and a welding current of a predetermined voltage is supplied between the tip 2 and the welding base metal 6 by the welding power supply 1. To be done. The welding current setting device 10 is for setting the welding current, and the welding current setting value input from the setting device 10 is supplied to the current / voltage control circuit 8 together with the voltage setting value from the voltage setting device (not shown). The current voltage control circuit 8 inputs the welding voltage command value to the power supply 1.
The output of the current setting device 10 is also input to the comparator 9, and the detected value of the welding current detected by the current detector 7 connected between the welding base material 6 and the power source 1 is also input to the comparator 9. It Then, the comparator 9 takes the difference between the detected value of the welding current and the set value, and integrates this difference to output an integrated signal of the difference between the detected value and the set value. The output of the comparator 9 is input to the wire feeding motor 5, and the motor 5 drives the roller 4 to feed the wire based on the feeding speed by the integral signal.

【0004】この従来技術によれば、チップと母材との
間の距離lが変動しても、それに対応してワイヤ送給速
度を変化させることにより、実際に出力される出力電流
を設定値に保つことができる。
According to this prior art, even if the distance l between the chip and the base material fluctuates, the wire feeding speed is changed correspondingly, so that the output current actually output is set to a set value. Can be kept at

【0005】[0005]

【発明が解決しようとする課題】この従来の制御装置の
比較器9は、図8に示すように、減算器9aにより溶接
電流の設定値出力信号IRから検出値出力信号IFを減算
したものを積分回路9bにより積分処理して得た溶接電
流指令値Fを出力するように構成されている。
As shown in FIG. 8, the comparator 9 of this conventional control device subtracts the detected value output signal I F from the set value output signal I R of the welding current by the subtracter 9a. It is configured to output a welding current command value F obtained by integrating the product by the integrating circuit 9b.

【0006】この場合に、差信号を積分した信号を得る
ための積分回路9bの回路時定数Tは、電流設定値が一
定の条件において、アーク負荷の変動により常時変化し
ている電流を無視できる程度の大きな時定数として、ワ
イヤ送給速度の発振を防止できるものにする必要があ
る。
In this case, the circuit time constant T of the integrating circuit 9b for obtaining the signal obtained by integrating the difference signal can ignore the current which is constantly changing due to the fluctuation of the arc load under the condition that the current setting value is constant. As a large time constant, it is necessary to prevent oscillation of the wire feeding speed.

【0007】しかし、この大きな時定数の積分回路によ
れば、電流設定値を変更する場合及び溶接開始時には、
設定値と実際の出力とが一致するまでの間、溶接電流が
設定値と大きく異なった状態のまま溶接が行われてしま
う。
However, according to the integrating circuit having the large time constant, when the current set value is changed and the welding is started,
Until the set value and the actual output match, welding is carried out with the welding current largely different from the set value.

【0008】例えば、設定値の変更時の応答性について
は、図9に示すように、電流設定値が小→大となったと
きは、電流設定値IRと電流検出値IFの値を積分し、ワ
イヤ送給速度指令値Fが徐々に増加する。この結果、出
力電流が増加して、検出値IFも徐々に増加する。最終
的に設定値IRと検出値IFが一致する値でワイヤ送給速
度指令値Fが決定される。
For example, as to the responsiveness when the set value is changed, as shown in FIG. 9, when the current set value changes from small to large, the values of the current set value I R and the current detection value I F are changed. The wire feeding speed command value F is gradually increased by integration. As a result, the output current increases and the detected value I F also gradually increases. Finally, the wire feed speed command value F is determined by the value at which the set value I R and the detected value I F match.

【0009】しかしながら、設定値IRが変更された時
点では、設定値IRに比して検出値IFは極めて小さいた
め、換言すれば実際の出力電流が極めて小さな値である
ため、入熱が小さく溶け込み不足及び凸ビードが発生
し、所望の溶接結果が得られないという難点がある。
However, at the time when the set value I R is changed, the detected value I F is extremely small compared to the set value I R , in other words, the actual output current is a very small value, so the heat input However, there is a problem in that the desired welding result cannot be obtained because the melting point is small and insufficient penetration and convex beads occur.

【0010】逆に、図10に示すように、電流設定値が
大→小となったときは、設定値の変更時点では、検出値
は極めて大きな値であるため、入熱過多で溶け落ち及び
アンダーカット等の溶接欠陥を招いてしまう。
On the other hand, as shown in FIG. 10, when the current setting value is increased from large to small, the detected value is extremely large at the time of changing the set value. It causes welding defects such as undercut.

【0011】なお、図11に示すように、溶接開始時の
応答性については、電流設定値を小→大にした場合にお
いて(図9)、設定値の変更前がIR=0の特殊な条件
として考えられ、その動作は図9の場合と同様であり、
同様の欠点を有する。
As shown in FIG. 11, regarding the responsiveness at the start of welding, when the current setting value is increased from small to large (FIG. 9), the special value of I R = 0 before the setting value is changed. It can be considered as a condition, and its operation is similar to the case of FIG.
It has similar drawbacks.

【0012】本発明はかかる問題点に鑑みてなされたも
のであって、溶接開始時及び設定値変化時においても、
溶接電流設定値と一致する電流検出値が極めて迅速に得
られ、所望の溶接品質を得ることができる消耗電極式ア
ーク溶接制御装置を提供することを目的とする。
The present invention has been made in view of the above problems, and even when welding is started and a set value is changed,
It is an object of the present invention to provide a consumable electrode type arc welding control device that can obtain a current detection value that matches a welding current set value extremely quickly and obtain a desired welding quality.

【0013】[0013]

【課題を解決するための手段】本発明に係る消耗電極式
アーク溶接制御装置は、溶接ワイヤチップと溶接母材と
の間に溶接電圧を供給する溶接電源と、前記溶接電源か
らの溶接電流を検出する電流検出器と、溶接電流を設定
する電流設定器と、前記電流検出器及び電流設定器の出
力信号の差を基に経時的に変動するワイヤ送給速度変動
分を求めると共に前記電流設定器の出力信号を基にワイ
ヤ送給速度基準分を求め両者を合わせてワイヤ送給速度
の指令値として出力する制御手段と、この溶接ワイヤ送
給速度指令値により指示された送給速度で前記溶接ワイ
ヤを前記溶接母材に向けて送給する溶接ワイヤ駆動手段
と、を有することを特徴とする。
A consumable electrode type arc welding control apparatus according to the present invention provides a welding power source for supplying a welding voltage between a welding wire tip and a welding base metal, and a welding current from the welding power source. A current detector for detecting, a current setting device for setting a welding current, and a wire feeding speed variation that changes with time based on the difference between the output signals of the current detector and the current setting device and the current setting. And a control means for obtaining a wire feeding speed reference amount based on the output signal of the welding machine and outputting both as a command value of the wire feeding speed, and the feeding speed instructed by the welding wire feeding speed command value. Welding wire drive means for feeding the welding wire toward the welding base material.

【0014】[0014]

【作用】本発明においては、制御手段が、電流検出器と
電流設定器の出力の差に基づいて、電流検出値が電流設
定値に一致するように、ワイヤ送給速度変動分を算出す
る。一方、電流設定値が変動した場合には、その新しい
電流設定値にて最適なワイヤ送給速度を、予め求めてお
いたワイヤ送給速度と電流設定値との関係から求め、こ
れをワイヤ送給速度基準分とする。そして、制御手段
は、このワイヤ送給速度基準分とワイヤ送給速度変動分
とを合わせてワイヤ送給速度の指令値として出力する。
駆動手段はこの指令値に基づいてワイヤを溶接母材に向
けて送給する。本発明においては、電流設定値の変動等
が生じた場合には、ワイヤ送給速度はその新しい電流設
定値に最適なワイヤ送給速度にステップ状に変化すると
共に、電流検出値が電流設定値に一致するようにワイヤ
送給速度変動分が演算処理され、この演算結果に基づい
てワイヤ送給速度を経時的に変動する。これにより、極
めて速やかに電流検出値が電流設定値に追随して変化
し、溶接電流を所望の設定値に一致させることができ
る。
In the present invention, the control means calculates the wire feed speed fluctuation amount based on the difference between the outputs of the current detector and the current setter so that the detected current value matches the set current value. On the other hand, when the current setting value fluctuates, the optimum wire feeding speed with the new current setting value is calculated from the previously obtained relationship between the wire feeding speed and the current setting value, and this is calculated. Shall be the supply speed standard. Then, the control means combines the wire feeding speed reference amount and the wire feeding speed fluctuation amount and outputs them as a command value of the wire feeding speed.
The drive means feeds the wire toward the welding base metal based on this command value. In the present invention, when a change in the current setting value occurs, the wire feeding speed changes stepwise to the wire feeding speed optimum for the new current setting value, and the current detection value changes the current setting value. The wire feeding speed variation is calculated so as to coincide with the above, and the wire feeding speed is changed over time based on the calculation result. As a result, the detected current value changes extremely quickly following the current set value, and the welding current can be made to match the desired set value.

【0015】[0015]

【実施例】次に、本発明の実施例について添付の図面を
参照して具体的に説明する。
Embodiments of the present invention will now be specifically described with reference to the accompanying drawings.

【0016】図1は本発明の実施例に係る消耗電極式ア
ーク溶接制御装置を示すブロック図、図2は同じくその
電流制御回路部分を抽出して示すブロック図である。電
源11の出力端子から出力された電流は、チップ12に
よりワイヤ13に通電され、ワイヤ13と母材14との
間にアークを発生させる。そして、このアークを発生さ
せた電流は電流検出器15を介して電源1の他の出力端
子に流れるという経路をとる。
FIG. 1 is a block diagram showing a consumable electrode type arc welding control apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a current control circuit portion thereof similarly extracted. The current output from the output terminal of the power supply 11 is applied to the wire 13 by the chip 12 to generate an arc between the wire 13 and the base material 14. Then, the current that generated this arc takes a path of flowing to the other output terminal of the power supply 1 via the current detector 15.

【0017】ワイヤ13はアークにより溶融するが、こ
のワイヤ13はモータ17により駆動される送給ローラ
16により母材14に向けて連続的に供給される。モー
タドライバー18は、後述する制御回路の加算器22か
らワイヤ送給速度指令値Fを入力して、その指令値にあ
う送給速度でワイヤを送給すべくモータ17を駆動す
る。
Although the wire 13 is melted by the arc, the wire 13 is continuously supplied toward the base material 14 by the feeding roller 16 driven by the motor 17. The motor driver 18 inputs a wire feeding speed command value F from an adder 22 of a control circuit described later, and drives the motor 17 to feed the wire at a feeding speed matching the command value.

【0018】電源1は出力電圧を略定電圧にする電圧制
御型の電源であり、ワイヤ送給速度が変化した場合、例
えば、ワイヤ送給速度が大きくなった場合、アーク長の
変動による負荷抵抗の減少により電流が増大するため、
ワイヤ溶融量が大きくなる。結果的に、送給速度とバラ
ンスした溶融量となるように電流が制御される。また電
源1は短絡とアーク等、アーク状態に応じてその出力特
性を変えたり、出力波形を制御する波形制御型の電源で
もよく、要は送給速度に見合った溶融量となるように出
力電流が制御されるものであればよい。
The power source 1 is a voltage control type power source for making the output voltage a substantially constant voltage, and when the wire feeding speed changes, for example, when the wire feeding speed increases, the load resistance due to the variation of the arc length. As the current increases due to the decrease of
The amount of wire melting increases. As a result, the current is controlled so that the melting amount is in balance with the feeding speed. Further, the power supply 1 may be a waveform control type power supply that changes its output characteristics according to the arc state such as short circuit and arc, or controls the output waveform. The point is that the output current is adjusted so that the melting amount corresponds to the feeding speed. Can be controlled.

【0019】電流設定器19は電流設定値IRを出力
し、電流検出器15は電流検出値IFを出力する。演算
回路20は電流設定値IRを入力し、後述する関数fに
より演算して、又は記憶テーブルに設定した値から選択
して、ワイヤ送給速度基準値FRを出力する。演算回路
21はその減算器21aが溶接電流設定値IRと溶接電
流検出値IFとの差信号を求め、その積分器21bがそ
の差信号を積分演算式gにより演算し、その演算結果と
してのワイヤ送給速度変動分FEを出力する。
The current setting device 19 outputs a current setting value I R , and the current detector 15 outputs a current detection value I F. The arithmetic circuit 20 inputs the current setting value I R , calculates it by the function f described later, or selects from the values set in the storage table, and outputs the wire feeding speed reference value F R. In the arithmetic circuit 21, the subtractor 21a obtains a difference signal between the welding current set value I R and the welding current detection value I F, and the integrator 21b calculates the difference signal by the integral arithmetic expression g, and the calculated result is obtained. The wire feed speed fluctuation amount F E is output.

【0020】ワイヤ送給速度基準値FRと差信号の演算
結果であるワイヤ送給速度変動分FEは、加算器22に
入力され、その加算結果はワイヤ送給速度指令値Fとし
て、加算器22からモータドライバー18に出力され
る。
The wire feed speed reference value F R and the wire feed speed fluctuation amount F E which is the calculation result of the difference signal are input to the adder 22, and the addition result is added as the wire feed speed command value F. It is output from the device 22 to the motor driver 18.

【0021】実際の溶融電流iaとワイヤ送給速度Wf
関係は、ワイヤ径、ワイヤ材質及びガス種類により略一
義的に決まる。図3は横軸に溶接電流iaをとり、縦軸
にワイヤ送給速度wfをとって、溶接電流に対してバラ
ンスするワイヤ送給速度を示す特性曲線である。この特
性曲線f1は、ワイヤ径1.2mmφ、軟鋼ワイヤ、CO2
スの場合の溶融特性を示している。この中で、曲線
1,l2,l3はチップと母材との間の距離がl1>l2
>l3の場合の特性であり、チップ−母材間距離が大き
い程、チップ12よりも先端側に位置する部分の溶接ワ
イヤで発生するジュール熱が大きくなり、ワイヤ溶融量
が大きくなるため、小さな電流でワイヤ送給速度にあっ
た溶融速度が得られる。l2が標準的長さである。
The relationship between the actual melting current i a and the wire feeding speed W f is substantially uniquely determined by the wire diameter, the wire material and the gas type. FIG. 3 is a characteristic curve showing the wire feeding speed balanced against the welding current, with the welding current i a on the horizontal axis and the wire feeding speed w f on the vertical axis. The characteristic curve f 1 shows the melting characteristic in the case of a wire diameter of 1.2 mmφ, a mild steel wire, and CO 2 gas. Among these, the curves l 1 , l 2 and l 3 have a distance between the chip and the base material l 1 > l 2
> It is a characteristic in the case of l 3, chip - as between the base material distance is greater, Joule heat generated in the welding wire portion positioned at the front end side than the tip 12 is increased, since the wire melting amount increases, With a small electric current, the melting rate matching the wire feeding rate can be obtained. l 2 is the standard length.

【0022】図1に示す演算回路20の関数fを、図3
のf1−l1の関数とすれば、例えば、電流設定値IR
対してワイヤ送給速度基準値FRを出力する(図3のA
点)。
The function f of the arithmetic circuit 20 shown in FIG.
If it is a function of f 1 −l 1, the wire feed speed reference value F R is output with respect to the current setting value I R (A in FIG.
point).

【0023】実際にはチップ−母材間距離が標準長さよ
り長く、電流検出値IFが電流設定値IRより小さい場合
がある(図3のB点)。この場合は、演算回路21によ
り、正の値の演算結果FEを出力し、ワイヤ送給速度を
大きくする。この結果、出力電流が大きくなって、最終
的にはIFがIRに一致する(図3のC点)。演算回路2
0はこの図3に示すワイヤ送給速度と溶接電流との関係
を、前述の関数fとして、関数式又は記憶テーブルによ
りストアしておき、溶接電流の設定値IRによりその溶
接条件下で最適のワイヤ送給速度をワイヤ送給速度基準
分として出力する。
In practice, the chip-base material distance may be longer than the standard length, and the current detection value I F may be smaller than the current setting value I R (point B in FIG. 3). In this case, the calculation circuit 21 outputs a positive calculation result F E to increase the wire feeding speed. As a result, the output current increases, and I F finally matches I R (point C in FIG. 3). Arithmetic circuit 2
0 stores the relationship between the wire feeding speed and the welding current shown in FIG. 3 as the above-mentioned function f by a function expression or a storage table, and the welding current setting value I R is optimal under the welding conditions. The wire feeding speed of is output as the wire feeding speed reference amount.

【0024】一方、演算回路21においては、その演算
式gは積分又は比例積分として、検出値IFと設定値IR
の定常偏差を無くすことが望ましい。
On the other hand, in the arithmetic circuit 21, the arithmetic expression g is an integral or proportional integral, and the detected value I F and the set value I R
It is desirable to eliminate the steady deviation of.

【0025】また、この演算回路21によれば、ワイヤ
径、ワイヤ材質、ガスにより溶融特性が多少異なり、予
め、設定された関数fが実際の溶融特性f1と一致して
いなくても、FEによって補正できるが、ワイヤ径、ワ
イヤ材質、ガスのいずれか又は組み合わせにより関数f
を適正に設定しておくことが望ましい。図3はワイヤ径
が1.6mm、材質が軟鋼、ガスがCO2の場合の特性を示し
た。特に、溶融特性に影響するものは、ワイヤ径、ワイ
ヤ材質の種類となる。
Further, according to the arithmetic circuit 21, even if the melting function slightly differs depending on the wire diameter, the wire material, and the gas, and the preset function f does not match the actual melting characteristic f 1 , It can be corrected by E , but the function f depends on the wire diameter, wire material, gas, or combination.
It is desirable to set properly. FIG. 3 shows the characteristics when the wire diameter is 1.6 mm, the material is mild steel, and the gas is CO 2 . In particular, what affects the melting characteristics is the wire diameter and the type of wire material.

【0026】このように、電流設定値IRにより、標準
的なワイヤ送給速度の基準値を決めておき、チップ−母
材間距離の影響等の多少の溶融特性の変動に対しては、
出力電流をフィードバックし、ワイヤ送給速度を補正し
て出力電流を所定の値にする。
As described above, the standard value of the standard wire feeding speed is determined in advance by the current setting value I R , and for some fluctuations in the melting characteristics such as the influence of the distance between the tip and the base material,
The output current is fed back to correct the wire feeding speed to bring the output current to a predetermined value.

【0027】ここで、電流設定値を変化させた場合、例
えば、電流設定値を小→大とした場合の本実施例の動作
について説明する。
The operation of this embodiment when the current setting value is changed, for example, when the current setting value is changed from small to large, will be described.

【0028】電流設定値の変更前後の各信号のタイミン
グチャートを図4,5に、、また標準特性を図6に示
す。図4に示すように、電流設定値がIR0からIR1に大
きくなると、演算回路11の出力及びワイヤ送給速度基
準値FRがFR0乃至FR1になる。チップ−母材間距離が
標準長(図4、図6特性l0)であれば、電流検出値IF
は、FR1のときIR1となるため、直ちに設定値IR1とな
る(図6のA→B)。チップ−母材間距離が長い場合
[図5、図6特性l1]は、設定値変更前は、ワイヤ送
給速度がFR0と演算回路21の出力FE0の加算値にあ
り、検出値IFが設定値IR0に一致している(図6のC
点)。
Timing charts of respective signals before and after the change of the current set value are shown in FIGS. 4 and 5, and standard characteristics are shown in FIG. As shown in FIG. 4, when the current setting value increases from I R0 to I R1 , the output of the arithmetic circuit 11 and the wire feeding speed reference value F R become F R0 to F R1 . If the distance between the tip and the base material is the standard length (characteristic l 0 in FIGS. 4 and 6), the current detection value I F
Becomes I R1 when F R1 and therefore immediately becomes the set value I R1 (A → B in FIG. 6). When the distance between the tip and the base material is long [Characteristic l 1 in FIG. 5 and FIG. 6], the wire feeding speed is in the added value of F R0 and the output F E0 of the arithmetic circuit 21 before the set value is changed, and the detected value is obtained. I F matches the set value I R0 (C in FIG. 6)
point).

【0029】設定値をIR0からIR4にすると、ワイヤ送
給速度はFR4+FE0となり、電流は設定値IR1にほぼ近
い値IF1′が直ちに得られる(図6のD点)。
When the set value is changed from I R0 to I R4 , the wire feeding speed becomes F R4 + F E0 , and the current I F1 'which is almost close to the set value I R1 is immediately obtained (point D in FIG. 6).

【0030】その後、検出電流IFがIR1と一致するよ
う、演算回路の入力FEがFE1に変化して、ワイヤ送給
速度をFR1+FE1とする(図6のE点)。
Thereafter, the input F E of the arithmetic circuit is changed to F E1 so that the detected current I F matches I R1, and the wire feeding speed is set to F R1 + F E1 (point E in FIG. 6).

【0031】次に、電流設定値を大→小にした場合につ
いては、前述の動作と逆の動作となる。溶接開始時も同
様に設定された設定電流値IRと同じか又はそれにほぼ
近い出力電流が直ちに得られる。
Next, when the current setting value is increased from large to small, the above operation is reversed. At the start of welding, an output current that is the same as or nearly equal to the set current value I R that is similarly set is immediately obtained.

【0032】なお、本実施例では、演算回路20,2
1、加算器22により制御回路を構成したが、本発明は
これに限定されるものではなく、回路の働きとして電流
設定値IRと電流検出値IFを入力して、IRに基づいて
関数fで決定されたワイヤ送給速度の基準値FRと、IR
とIFとの差信号の演算結果FEとを加算した値をワイヤ
送給速度の指令値Fとして出力するものであれば、アナ
ログ回路又はCPUを含むデジタル回路等のいずれによ
り構成しても良い。
In this embodiment, the arithmetic circuits 20, 2
1, the control circuit is configured by the adder 22, but the present invention is not limited to this, and the current setting value I R and the current detection value I F are input as the function of the circuit, and based on I R The reference value F R of the wire feeding speed determined by the function f and I R
And an output signal F E of the difference signal between I F and I F may be output as the command value F of the wire feeding speed, any of an analog circuit or a digital circuit including a CPU may be used. good.

【0033】[0033]

【発明の効果】以上説明したように、本発明によれば、
溶接開始時及び設定値が変化した場合のように、溶接電
流設定値が大幅に変更されたときでも、電流設定値通り
の電流検出値が直ちに得られるため、従来のように実際
の電流値が大きすぎて、溶け落ちが発生したり、逆に小
さすぎて溶け込み不良及び凸ビードが発生したりする不
都合がなく、所望の溶接品質を得ることができる。
As described above, according to the present invention,
Even when the welding current setting value is significantly changed, such as when welding starts or when the setting value changes, the current detection value that matches the current setting value is immediately obtained, so the actual current value is It is possible to obtain a desired welding quality without the disadvantages that it is too large and melt-through occurs, and conversely, it is too small and melt-through failure and convex beads occur.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例に係る消耗電極式溶接制御装置
を示すブロック図である。
FIG. 1 is a block diagram showing a consumable electrode type welding control device according to an embodiment of the present invention.

【図2】同じくその制御回路部分を抽出して示すブロッ
ク図である。
FIG. 2 is a block diagram showing an extracted control circuit portion of the same.

【図3】ワイヤ送給速度と溶接電流との関係を示す特性
図である。
FIG. 3 is a characteristic diagram showing a relationship between a wire feeding speed and a welding current.

【図4】チップ−母材間距離が標準長の場合の電流変化
を示すタイミングチャート図である。
FIG. 4 is a timing chart showing changes in current when the distance between the tip and the base material is a standard length.

【図5】チップ−母材間距離が標準長より長い場合の電
流変化を示すタイミングチャート図である。
FIG. 5 is a timing chart showing changes in current when the distance between the tip and the base material is longer than the standard length.

【図6】本実施例の動作を説明するための特性図であ
る。
FIG. 6 is a characteristic diagram for explaining the operation of the present embodiment.

【図7】従来の消耗電極式アーク溶接機の電源制御装置
を示すブロック図である。
FIG. 7 is a block diagram showing a power supply control device of a conventional consumable electrode type arc welding machine.

【図8】同じくその比較器部分を示すブロック図であ
る。
FIG. 8 is a block diagram showing the comparator portion of the same.

【図9】同じくその電流変化を示すタイミングチャート
図である。
FIG. 9 is a timing chart diagram similarly showing the current change.

【図10】同じくその電流変化を示すタイミングチャー
ト図である。
FIG. 10 is a timing chart diagram showing the current change.

【図11】同じくその電流変化を示すタイミングチャー
ト図である。
FIG. 11 is a timing chart diagram similarly showing the current change.

【符号の説明】[Explanation of symbols]

11;電源 12;コンタクトチップ 13;溶接ワイヤ 14;母材 15;電流検出器 16;ローラ 17;モータ 18;モータドライバ 19;電流設定器 20,21;演算器 22;加算器 11; power supply 12; contact tip 13; welding wire 14; base material 15; current detector 16; roller 17; motor 18; motor driver 19; current setting device 20, 21; calculator 22; adder

───────────────────────────────────────────────────── フロントページの続き (72)発明者 本間 正浩 神奈川県藤沢市宮前字裏河内100番1 株 式会社神戸製鋼所藤沢事業所内 (72)発明者 佐藤 英市 神奈川県藤沢市宮前字裏河内100番1 株 式会社神戸製鋼所藤沢事業所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Honma 100-1 Urakawachi, Fujimae, Fujisawa, Kanagawa Kanagawa Fujisawa Plant (72) Inventor Hideshi Sato Urakawachi, Fujisawa, Kanagawa No. 100 No. 1 stock company Kobe Steel Works, Fujisawa Works

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 溶接ワイヤチップと溶接母材との間に溶
接電圧を供給する溶接電源と、前記溶接電源からの溶接
電流を検出する電流検出器と、溶接電流を設定する電流
設定器と、前記電流検出器及び電流設定器の出力信号の
差を基に経時的に変動するワイヤ送給速度変動分を求め
ると共に前記電流設定器の出力信号を基にワイヤ送給速
度基準分を求め両者を合わせてワイヤ送給速度の指令値
として出力する制御手段と、この溶接ワイヤ送給速度指
令値により指示された送給速度で前記溶接ワイヤを前記
溶接母材に向けて送給する溶接ワイヤ駆動手段と、を有
することを特徴とする消耗電極式アーク溶接制御装置。
1. A welding power source for supplying a welding voltage between a welding wire tip and a welding base material, a current detector for detecting a welding current from the welding power source, and a current setting device for setting the welding current. Based on the difference between the output signals of the current detector and the current setting device, the wire feeding speed variation that changes with time is obtained, and the wire feeding speed reference amount is obtained based on the output signal of the current setting device. A control unit that also outputs as a command value of the wire feeding speed, and a welding wire driving unit that feeds the welding wire toward the welding base metal at the feeding speed instructed by the welding wire feeding speed command value. And a consumable electrode type arc welding control device.
【請求項2】 前記制御手段は、前記電流検出器の出力
と前記電流設定器の出力との差をとる差演算器と、この
差演算器の出力に基づいてワイヤ送給速度の変動分を算
出する変動分演算器と、前記電流設定器の出力に基づい
てワイヤ送給速度基準分を出力する基準分出力器と、前
記変動分演算器及び基準分出力器の各出力を基にワイヤ
送給速度の指令値を算出する指令値演算器とを有するこ
とを特徴とする請求項1に記載の消耗電極式アーク溶接
制御装置。
2. The control means calculates a difference between the output of the current detector and the output of the current setting device, and a variation of the wire feeding speed based on the output of the difference calculator. A fluctuation component calculator for calculating, a reference component output device for outputting a wire feed speed reference component based on the output of the current setting device, and a wire feed based on each output of the variation component calculator and the reference component output device. The consumable electrode type arc welding control device according to claim 1, further comprising a command value calculator that calculates a command value of the feed rate.
【請求項3】 前記ワイヤ送給速度基準分は、適切なワ
イヤ送給速度を溶接電流の関数として予め求めておき、
この関数を、ワイヤ径、ワイヤ材質及びガス種類からな
る溶接条件の少なくとも1条件に応じて複数設定し、前
記制御手段は、その溶接条件に応じて適切な関数を選択
し、その溶接電流により決まるワイヤ送給速度基準分を
出力することを特徴とする請求項1に記載の消耗電極式
アーク溶接制御装置。
3. The wire feeding speed reference amount is obtained by previously obtaining an appropriate wire feeding speed as a function of welding current,
A plurality of these functions are set according to at least one welding condition consisting of wire diameter, wire material and gas type, and the control means selects an appropriate function according to the welding condition and is determined by the welding current. The consumable electrode type arc welding control device according to claim 1, wherein the wire feeding speed reference amount is output.
JP4256042A 1992-09-25 1992-09-25 Consumable electrode type arc welding controller Expired - Fee Related JP2541733B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4256042A JP2541733B2 (en) 1992-09-25 1992-09-25 Consumable electrode type arc welding controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4256042A JP2541733B2 (en) 1992-09-25 1992-09-25 Consumable electrode type arc welding controller

Publications (2)

Publication Number Publication Date
JPH06106349A true JPH06106349A (en) 1994-04-19
JP2541733B2 JP2541733B2 (en) 1996-10-09

Family

ID=17287105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4256042A Expired - Fee Related JP2541733B2 (en) 1992-09-25 1992-09-25 Consumable electrode type arc welding controller

Country Status (1)

Country Link
JP (1) JP2541733B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008108014A1 (en) * 2007-03-07 2008-09-12 Panasonic Corporation Welding device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008108014A1 (en) * 2007-03-07 2008-09-12 Panasonic Corporation Welding device
US8076611B2 (en) 2007-03-07 2011-12-13 Panasonic Corporation Welding device having a selector to designate welding conditions
JP5071111B2 (en) * 2007-03-07 2012-11-14 パナソニック株式会社 Welding equipment

Also Published As

Publication number Publication date
JP2541733B2 (en) 1996-10-09

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