JPS6225474B2 - - Google Patents
Info
- Publication number
- JPS6225474B2 JPS6225474B2 JP11070777A JP11070777A JPS6225474B2 JP S6225474 B2 JPS6225474 B2 JP S6225474B2 JP 11070777 A JP11070777 A JP 11070777A JP 11070777 A JP11070777 A JP 11070777A JP S6225474 B2 JPS6225474 B2 JP S6225474B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- welding
- power supply
- thyristor
- 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 33
- 238000009499 grossing Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Arc Welding Control (AREA)
Description
【発明の詳細な説明】
本発明は、自動溶接用消耗電極ワイヤの送給速
度制御を、入力電源電圧または溶接用電源装置の
出力電圧に比例する交流正弦波を整流した後、平
滑させることなくワイヤ送給速度制御命令電圧と
してサイリスタ点弧回路に印加して回路を簡略化
および安価にするとともに、入力電源電圧または
溶接用電源装置の出力電圧の変化に対しても応答
性良くワイヤ送給速度を追従変化させ、いわゆる
溶接電圧、溶接電流の一元化制御および電源電圧
変動補償制御を容易に実現させうる自動溶接用ワ
イヤ送給制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention automatically controls the feeding speed of a consumable electrode wire for welding without smoothing it after rectifying an alternating current sine wave proportional to the input power supply voltage or the output voltage of a welding power supply device. It is applied to the thyristor ignition circuit as the wire feed speed control command voltage, simplifying the circuit and making it cheaper, and also controlling the wire feed speed with good responsiveness to changes in the input power supply voltage or the output voltage of the welding power supply device. The present invention relates to an automatic welding wire feeding control device that can easily implement so-called unified control of welding voltage and welding current, and power supply voltage fluctuation compensation control.
一般に、溶接用消耗電極ワイヤを自動送給する
制御装置において、入力電源電圧または溶接用電
源装置の出力電圧に比例する電圧を取り出し、整
流平滑させ、この電圧を適正なワイヤ送給速度と
なる制御命令電圧とするとともに、入力電源電圧
または溶接用電源装置の出力電圧の変動に対して
も適正なワイヤ送給制御命令電圧の変動となるよ
うにして、いわゆる溶接電圧、電溶電流の電源電
圧変動補償および一元化制御を行うことは、従来
の自動溶接によく用いられてきた。第１図に従来
のワイヤ送給装置の回路構成を示す。 Generally, in a control device that automatically feeds consumable electrode wire for welding, a voltage proportional to the input power supply voltage or the output voltage of a welding power supply device is extracted, rectified and smoothed, and this voltage is controlled to maintain an appropriate wire feeding speed. In addition to setting the command voltage, the wire feeding control command voltage also changes appropriately in response to fluctuations in the input power supply voltage or the output voltage of the welding power supply device, so as to control the fluctuations in the power supply voltage of the so-called welding voltage and electrolytic current. Providing compensation and centralized control has been commonly used in conventional automatic welding. FIG. 1 shows the circuit configuration of a conventional wire feeding device.
図において、１は自動溶接機の交流入力端子、
２は溶接用主変圧器、３は主整流器、４は溶接ア
ーク特性を制御するリアクタ等で構成された制御
回路、５は溶接用出力端子、６は制御回路用の溶
接機出力電圧整流回路、７は平滑回路、８は制御
命令電圧設定回路（抵抗）、９はサイリスタ点弧
回路、１０は直流モータの回転速度制御用サイリ
スタ、１１はワイヤ送給用直流モータ、１２はモ
ータ１１および制御回路の電源回路部であり、図
のように結線されている。 In the figure, 1 is the AC input terminal of the automatic welding machine;
2 is a main transformer for welding, 3 is a main rectifier, 4 is a control circuit composed of a reactor etc. that controls welding arc characteristics, 5 is an output terminal for welding, 6 is a welding machine output voltage rectifier circuit for the control circuit, 7 is a smoothing circuit, 8 is a control command voltage setting circuit (resistance), 9 is a thyristor firing circuit, 10 is a thyristor for controlling the rotational speed of a DC motor, 11 is a DC motor for wire feeding, 12 is a motor 11 and a control circuit This is the power supply circuit section of the device, and the wires are connected as shown in the figure.
そしてこの場合、入力電源電圧や溶接装置出力
電圧に比例する電圧は交流正弦波であり、一方、
従来のワイヤ送給制御装置のワイヤ送給速度制御
命令電圧は直流平滑電圧を必要とするため、前記
交流正弦波を整流した後、平滑回路７を設ける必
要があつた。この結果、部品点数が増すため高価
となり、安価に平滑回路７を実現するために抵抗
およびコンデンサからなる、いわゆるCR平滑回
路を用いた場合、大きな充放電時定数が生じ、瞬
時的な入力電源電圧の変動には追従することがで
きず、いわゆる静的な溶接電圧および溶接電流の
電源電圧変動補償および一元化制御しかできない
欠点を有していた。 And in this case, the voltage proportional to the input power supply voltage and the welding device output voltage is an AC sine wave;
Since the wire feeding speed control command voltage of the conventional wire feeding control device requires a DC smoothing voltage, it was necessary to provide a smoothing circuit 7 after rectifying the AC sine wave. As a result, the number of parts increases, making it expensive.If a so-called CR smoothing circuit consisting of a resistor and a capacitor is used to realize the smoothing circuit 7 at low cost, a large charging/discharging time constant occurs, and the instantaneous input power supply voltage However, it is not possible to follow fluctuations in the welding voltage and welding current, and has the drawback that only static power supply voltage fluctuation compensation and unified control of the welding voltage and welding current can be performed.
本発明は、このような従来の欠点を除去したも
のであり、以下その一実施例について第１図と同
一部分には同一番号を付し、相違する点について
説明する。 The present invention eliminates such conventional drawbacks, and the following describes one embodiment of the present invention, in which the same parts as those in FIG.
１３は第１の定電圧受動素子、１４は抵抗、１
５は第２の定電圧受動素子であり、図のように結
線されている。すなわち、要部としての整流回路
６の出力側には、定電圧受動素子１３と抵抗１４
の直列回路に定電圧受動素子１５が並列に接続さ
れその直並列回路に制御命令電圧設定回路８が直
列に接続された回路が接続されている。 13 is a first constant voltage passive element, 14 is a resistor, 1
5 is a second constant voltage passive element, which is connected as shown in the figure. That is, on the output side of the rectifier circuit 6 as the main part, a constant voltage passive element 13 and a resistor 14 are provided.
A constant voltage passive element 15 is connected in parallel to the series circuit, and a circuit in which a control command voltage setting circuit 8 is connected in series is connected to the series-parallel circuit.
そして整流回路６の出力側には、第３図に示す
ように、入力電源電圧または溶接機出力電圧に比
例した全波整流正弦波が得られる。これを定電圧
受動素子１５，１３および抵抗１４，８で構成さ
れる回路に印加し、抵抗８の分割点電圧を点弧回
路９に印加した場合、点弧回路９の入力電圧波形
は第４図に示すように、第３図の全波整流正弦波
の下部をカツトした波形となる。したがつて入力
電源電圧または溶接機出力電圧が変動した場合、
定電圧受動素子１５，１３の定電圧吸収値を適当
に選択することによつて、適正なワイヤ送給モー
タ速度の変動となるように点弧回路９の入力電圧
であるワイヤ送給速度制御命令電圧の変動とする
ことができる。 On the output side of the rectifier circuit 6, as shown in FIG. 3, a full-wave rectified sine wave proportional to the input power supply voltage or the output voltage of the welding machine is obtained. When this is applied to a circuit composed of constant voltage passive elements 15, 13 and resistors 14, 8, and the dividing point voltage of resistor 8 is applied to ignition circuit 9, the input voltage waveform of ignition circuit 9 is As shown in the figure, the waveform is obtained by cutting off the lower part of the full-wave rectified sine wave in FIG. Therefore, if the input power supply voltage or welding machine output voltage fluctuates,
By appropriately selecting the constant voltage absorption values of the constant voltage passive elements 15 and 13, the wire feed speed control command, which is the input voltage of the ignition circuit 9, is controlled so that the wire feed motor speed changes appropriately. It can be a voltage fluctuation.
なお、第５図は第２図に示した回路の具体的な
回路を示している。第５図において、第２図に示
した構成と同一の構成について同一番号を付して
いる。 Note that FIG. 5 shows a specific circuit of the circuit shown in FIG. In FIG. 5, the same components as those shown in FIG. 2 are given the same numbers.
９ａは点弧用サイリスタ、９ｂはトランジス
タ、９ｃはコンデンサ、９ｄは抵抗、V1は第３
図に示す整流回路６の出力電圧、V2は第４図に
示す点弧回路９の入力電圧、V3は電源回路部２
の出力電圧、ＶMはワイヤ送給用直流モータ１１
の両端電圧、ＶGはサイリスタ１０のゲート・カ
ソード間電圧、ＶCは第１トランジスタ９ｂのベ
ース電圧を示し、CRはワイヤ送給中に閉路し、
ワイヤ送給停止で開路するリレー接点、CR′はワ
イヤ送給中に開路し、ワイヤ送給停止で閉路する
リレー接点である。 9a is an ignition thyristor, 9b is a transistor, 9c is a capacitor, 9d is a resistor, V1 is the third
The output voltage of the rectifier circuit 6 shown in the figure, V 2 is the input voltage of the ignition circuit 9 shown in FIG.
The output voltage of the wire feeding DC motor 11, V M is
, V G is the gate-cathode voltage of the thyristor 10, V C is the base voltage of the first transistor 9b, CR is closed during wire feeding,
CR' is a relay contact that opens when wire feeding is stopped, and CR' is a relay contact that opens when wire feeding is stopped and closes when wire feeding is stopped.
第５図において、ワイヤ送給している時、第１
トランジスタ９ｂのベース電圧ＶCは第６図に示
すように点弧回路入力電圧V2と抵抗９ｄ、コン
デンサ９ｃの値で決まる時定数により充電される
略三角波状となる。このＶCとワイヤ送給用直流
モータ１１の両端電圧ＶMとの比較により、ＶCが
ＶMを上回つた時にトランジスタ９ｂ、点弧用サ
イリスタ９ａが導通状態となり、サイリスタ１０
にゲート信号ＶGが印加され、ワイヤ送給量制御
がおこなわれる、V2電圧が前記第２図の説明に
より、電源電圧の変動や溶接出力の設定の変化に
対し、遅れ時間を発生させることなく、点弧回路
部９に入力される結果、円滑なワイヤ送給量の制
御が実現される。 In Fig. 5, when feeding the wire, the first
As shown in FIG. 6, the base voltage V C of the transistor 9b has a substantially triangular waveform charged by the time constant determined by the ignition circuit input voltage V 2 and the values of the resistor 9d and capacitor 9c. By comparing this V C and the voltage V M across the wire feeding DC motor 11, when V C exceeds V M , the transistor 9b and the ignition thyristor 9a become conductive, and the thyristor 10 becomes conductive.
A gate signal V G is applied to control the wire feed amount. As explained in FIG. As a result, smooth control of the wire feed amount is realized.
以上のような本発明の自動溶接用ワイヤ送給制
御装置によれば、入力電源電圧または溶接用電源
装置の出力電圧に比例する電圧を、平滑させるこ
となくワイヤ送給速度制御命令電圧とすることが
可能であり、回路を簡略化して安価にするととも
に、入力電源電圧または溶接用電源装置の出力電
圧の変化に対しても応答追従性良く、ワイヤ送給
速度を変化させることができ、いわゆる溶接電
圧、溶接電流の一元化制御および電源電圧変動補
償制御を容易に実現させ、市場に提供することが
できる。 According to the automatic welding wire feeding control device of the present invention as described above, the voltage proportional to the input power supply voltage or the output voltage of the welding power supply device can be used as the wire feeding speed control command voltage without smoothing. In addition to simplifying the circuit and making it cheaper, it also has good responsiveness to changes in the input power supply voltage or the output voltage of the welding power supply device, and the wire feeding speed can be changed. Unified control of voltage and welding current and power supply voltage fluctuation compensation control can be easily realized and provided to the market.
第１図は従来の自動溶接用ワイヤ送給制御装置
の回路図、第２図は本発明による自動溶接用ワイ
ヤ送給制御装置の一実施例の回路図、第３図、第
４図は同装置における要部の電圧波形図、第５図
は第２図の具体的回路図、第６図は同具体的回路
における要部の電圧波形図である。
６……溶接機出力電圧整流回路、８……制御命
令電圧設定回路、９……点弧回路、１０……サイ
リスタ、１１……ワイヤ送給用直流モータ、１２
……電源回路部、１３，１５……定電圧受動素
子、１４……抵抗。
Fig. 1 is a circuit diagram of a conventional automatic welding wire feed control device, Fig. 2 is a circuit diagram of an embodiment of an automatic welding wire feed control device according to the present invention, and Figs. 3 and 4 are the same. FIG. 5 is a diagram of the voltage waveforms of the main parts of the device, FIG. 5 is a specific circuit diagram of FIG. 2, and FIG. 6 is a diagram of the voltage waveforms of the main parts of the specific circuit. 6... Welding machine output voltage rectifier circuit, 8... Control command voltage setting circuit, 9... Ignition circuit, 10... Thyristor, 11... DC motor for wire feeding, 12
...Power supply circuit section, 13, 15... Constant voltage passive element, 14... Resistor.
Claims (1)
送給用直流モータと、前記直流モータの回転速度
を制御するサイリスタと、前記サイリスタを点弧
させる点弧回路と、入力電源電圧または溶接用電
源装置の出力電圧に対応した全波整流正弦波電圧
を印加する第１の定電圧受動素子と抵抗の直列回
路に第２の定電圧受動素子を並列に接続しかつそ
の直並列回路に制御命令電圧設定回路を直列に接
続した回路と、前記制御命令電圧設定回路の分割
点電圧を前記ワイヤ送給用直流モータの速度制御
命令電圧として前記サイリスタの点弧回路に印加
する回路とを有することを特徴とする自動溶接用
ワイヤ送給制御装置。1. A wire feeding DC motor that automatically feeds a welding consumable electrode wire, a thyristor that controls the rotational speed of the DC motor, an ignition circuit that ignites the thyristor, and an input power supply voltage or welding power supply device. A second constant voltage passive element is connected in parallel to a series circuit of a first constant voltage passive element and a resistor that applies a full-wave rectified sine wave voltage corresponding to the output voltage of , and a control command voltage is set to the series/parallel circuit. It is characterized by having a circuit in which circuits are connected in series, and a circuit that applies a dividing point voltage of the control command voltage setting circuit to the ignition circuit of the thyristor as a speed control command voltage of the wire feeding DC motor. Automatic welding wire feed control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11070777A JPS5443852A (en) | 1977-09-14 | 1977-09-14 | Wire feed controller for automatic welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11070777A JPS5443852A (en) | 1977-09-14 | 1977-09-14 | Wire feed controller for automatic welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5443852A JPS5443852A (en) | 1979-04-06 |
| JPS6225474B2 true JPS6225474B2 (en) | 1987-06-03 |
Family
ID=14542412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11070777A Granted JPS5443852A (en) | 1977-09-14 | 1977-09-14 | Wire feed controller for automatic welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5443852A (en) |
-
1977
- 1977-09-14 JP JP11070777A patent/JPS5443852A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5443852A (en) | 1979-04-06 |
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