JPS6234466B2 - - Google Patents
Info
- Publication number
- JPS6234466B2 JPS6234466B2 JP15576783A JP15576783A JPS6234466B2 JP S6234466 B2 JPS6234466 B2 JP S6234466B2 JP 15576783 A JP15576783 A JP 15576783A JP 15576783 A JP15576783 A JP 15576783A JP S6234466 B2 JPS6234466 B2 JP S6234466B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- welding
- frequency
- voltage
- welding wire
- 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 59
- 238000001514 detection method Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 23
- 230000006698 induction Effects 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 17
- 230000010355 oscillation Effects 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/127—Means for tracking lines during arc welding or cutting
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
【発明の詳細な説明】
本発明は溶接継手位置を自動的に確認できるワ
イヤセンス方式を採用した溶接用倣い検出装置に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding trace detection device employing a wire sense method that can automatically confirm the position of a weld joint.
溶接ワイヤ式アーク溶接ロボツト或は自動アー
ク溶接機においは、溶接ワイヤと被溶接材との間
に適当な電源電圧を印加しておき、予め設定され
た手順(プログラム)でワイヤ先端と被溶接材表
面との間を短絡してその回路電流(或は電圧)の
変化を検出するとともにそのときの座標を読み込
むことによつて溶接継手(開先)位置を自動的に
確認することが出来る、いわゆるワイヤセンス方
式が採用されている。 In a welding wire type arc welding robot or automatic arc welding machine, an appropriate power supply voltage is applied between the welding wire and the workpiece, and the wire tip and workpiece are connected in accordance with a preset procedure (program). By short-circuiting the surface and detecting changes in the circuit current (or voltage) and reading the coordinates at that time, the weld joint (groove) position can be automatically confirmed. A wire sense method is used.
第1図a,bは従来のかかるワイヤセンス方式
を説明するための異なる構成例を示すものであ
る。同図aにおいては、溶接用電源Pwとワイヤ
センス用電源Psを別個に設け、これらを切替ス
イツチSwにより切替えて溶接ワイヤ2と被溶材
1との間に電源電圧を印加するようにしたもので
ある。つまり、切替スイツチSWを接点a―1,
a―2側に切替えてワイヤセンス用電源Psの電
圧を溶接ワイヤ2と被溶接材1との間に印加し、
そのときの回路電流(又は電圧)をワイヤセンス
検出器Is(又はVs)で検出するものである。ま
た第1図bにおいては溶接用電源Pwと溶接ワイ
ヤ2、被溶接材1とを結ぶ電源回路にワイヤセン
ス用直列抵抗Rsを並列接続した溶接用コンタク
トCを設けて、溶接用電源Pwをワイヤセンス用
電源にも共用するようにしたもので、溶接用コン
ダクタCを開いてワイヤセンス状態とし、そのと
きの回路電流(又は電圧)をワイヤセンス検出器
I(又はV)で検出するものである。 FIGS. 1a and 1b show different configuration examples for explaining the conventional wire sensing method. In Figure a, a welding power source Pw and a wire sense power source Ps are provided separately, and these are switched by a changeover switch Sw to apply a power source voltage between the welding wire 2 and the workpiece 1. be. In other words, changeover switch SW is connected to contact a-1,
Switch to the a-2 side and apply the voltage of the wire sense power supply Ps between the welding wire 2 and the material to be welded 1,
The circuit current (or voltage) at that time is detected by the wire sense detector Is (or Vs). In addition, in Fig. 1b, a welding contact C in which a series resistor Rs for wire sense is connected in parallel is provided in the power circuit connecting the welding power source Pw, the welding wire 2, and the workpiece 1, and the welding power source Pw is connected to the wire. It is also used as a sense power source, and the welding conductor C is opened to set the wire sense state, and the circuit current (or voltage) at that time is detected by the wire sense detector I (or V). .
しかし、第1図aに示す構成のものはワイヤセ
ンス用電源Psと溶接用電源Pwとを切替えて溶接
ワイヤ2と被溶接材1との端子間に電源電圧を印
加するようにしているため、上記ワイヤセンス用
電源Psと溶接用電源Pwとの切替スイツチSWを
必要とする。 However, in the configuration shown in FIG. 1a, the power source Ps for wire sense and the power source Pw for welding are switched to apply the power source voltage between the terminals of the welding wire 2 and the material to be welded 1. A changeover switch SW is required between the wire sense power source Ps and the welding power source Pw.
また第1図a,bに示す構成で共通して言える
ことは溶接ワイヤ先端或は被溶接材継手付近の表
面状態のバラツキにより両者の電気的接触抵抗に
バラツキがあり、そのバラツキを吸収するために
は、かなり高い電圧を印加しなければならない。
これは機器の絶縁性能と、場合によつては人体へ
の安全性にも特別な配慮を要することにもなり、
複雑且つコスト高の要因になつている。 What is common to the configurations shown in Fig. 1 a and b is that there are variations in the electrical contact resistance between the two due to variations in the surface condition near the welding wire tip or the joint of the welded material, and in order to absorb this variation, requires a fairly high voltage to be applied.
This requires special consideration for the insulation performance of the equipment and, in some cases, for human safety.
This has become a factor of complexity and high cost.
本発明ではこのような欠点を緩和し、簡単な機
構で装着取扱いの容易な、且つ溶接ワイヤと被溶
接材との間の接触状態に左右されることなく安定
な検出機能を発揮させ得る溶接用倣い検出装置を
提供することを目的としている。 The present invention alleviates these drawbacks, and provides a welding device that has a simple mechanism, is easy to install and handle, and can exhibit a stable detection function regardless of the contact state between the welding wire and the workpiece. The object of the present invention is to provide a tracing detection device.
本発明はかかる目的を達成するため、ワイヤセ
ンス方式に於て溶接ワイヤ先端と被溶接材との間
が接触すると、溶接ワイヤ、被溶接材、溶接側ケ
ーブルを通して高周波短絡閉回路が形成されるよ
うに高周波バイパスコンデンサを設けるとともに
その短絡回路にインダクタンスが変化するような
誘導コイルを設けておき、本誘導コイルに予め印
加された微弱高周波電流の変化によるインダクタ
ンスの変化速度(変化率)を検出し、弁別するこ
とにより、溶接ワイヤと被溶接材との間の接触を
瞬時に検知することができる構成とするもので、
次のような特徴がある。 In order to achieve such an object, the present invention is designed to form a high frequency short circuit through the welding wire, the material to be welded, and the welding cable when the tip of the welding wire and the material to be welded come into contact in the wire sense method. A high-frequency bypass capacitor is provided in the short circuit, and an induction coil whose inductance changes is provided in the short circuit, and the rate of change in inductance due to a change in the weak high-frequency current applied to the induction coil in advance is detected. By discriminating, contact between the welding wire and the material to be welded can be instantly detected.
It has the following characteristics:
高周波誘導コイルによる間接印加・検出方式
なので、母機本体の運転操作に伴なつて発生す
るノイズに妨害させる可能性が極めて低い。 Since this is an indirect application/detection method using a high-frequency induction coil, there is an extremely low possibility of interference from noise generated during operation of the main unit.
既存母機への取付けは、極めて簡単で、且
つ、従来方式のような切替スイツチの取付け等
の改造は一切不要である。 Installation to an existing mother machine is extremely easy, and there is no need for any modifications such as installing a changeover switch as in the conventional system.
誘導コイルを含む高周波発振回路は、溶接ワ
イヤと被溶接材間接触の有無により発振振幅の
変化が大きくなるように回路中のC,R,L定
数を設定してあるので、検出感度が極めて高
く、従つてワイヤ先端或は被溶接材継手付近の
表面状態に左右されることなく、安定な検出機
能を果すことが出来る。 The high-frequency oscillation circuit that includes an induction coil has extremely high detection sensitivity because the C, R, and L constants in the circuit are set so that the oscillation amplitude changes greatly depending on the presence or absence of contact between the welding wire and the welded material. Therefore, a stable detection function can be achieved without being affected by the surface condition near the wire tip or the joint of the welded material.
溶接ワイヤと被溶接材間接触による誘導コイ
ルのインダクタンス変化速度を検出し、弁別す
るので、被検出回路を含む回路のインダクタン
ス絶対値には余り影響されず、操作性の優れた
ものとなる。 Since the rate of change in inductance of the induction coil due to contact between the welding wire and the welded material is detected and discriminated, it is not greatly influenced by the absolute value of inductance of the circuit including the detected circuit, resulting in excellent operability.
以下本発明の一実施例を図面を参照して説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
第2図は本発明に係る溶接用倣い検出装置の構
成例を示すものである。同図aは突合せ溶接継手
に本検出手段を適用する場合のブロツク構成例で
あつて、1は被溶接材、2は溶接ワイヤ、2aは
溶接側ケーブル、3は誘導コイル、3aは接続ケ
ーブル、CHFは高周波電流迂回防止用高周波バ
イパスコンデンサである。また4は整合トラン
ス、5は特性調整回路、6は高周波発振回路、7
は検波回路、8は振幅変化率弁別回路、9は弁別
しきい値設定回路、10は弁別結果の記憶回路、
11は弁別表示回路、12は弁別記憶のリセツト
回路をそれぞれ示す。同図bはすみ肉溶接継手を
対象とする場合を示し、検出部の各回路について
は第2図aのそれらと同じなので省略してある。 FIG. 2 shows an example of the configuration of a welding tracing detection device according to the present invention. Figure a shows an example of a block configuration when this detection means is applied to a butt welded joint, in which 1 is the material to be welded, 2 is the welding wire, 2a is the welding side cable, 3 is the induction coil, 3a is the connection cable, CHF is a high frequency bypass capacitor for preventing high frequency current detour. Further, 4 is a matching transformer, 5 is a characteristic adjustment circuit, 6 is a high frequency oscillation circuit, and 7
8 is a detection circuit, 8 is an amplitude change rate discrimination circuit, 9 is a discrimination threshold setting circuit, 10 is a discrimination result storage circuit,
11 is a discrimination display circuit, and 12 is a discrimination memory reset circuit. FIG. 2B shows a case in which a fillet weld joint is targeted, and the circuits of the detection section are the same as those in FIG. 2A, so they are omitted.
第2図cは第2図a,bに於ける誘導コイル3
の詳細な構成を示すものである。 Figure 2c shows the induction coil 3 in Figures 2a and b.
This figure shows the detailed configuration of .
次に、第3図は、第2図aに示したブロツク構
成例に従う具体的電気回路を示すものである。3
aは接続ケーブル(第2図aの3aに対応)、4
は整合トランス(第2図aの4に対応)で、整合
用高周波トランスT1が用いられている。5は特
性調整回路(第2図aの5に対応)可変抵抗器
VR1及び可変コンデンサVC1により高周波回路
の電気的特性を調整するものである。6は発振回
路(第2図aの対応)で、発振コイルT2、発振
用高周波トランジスタTR1、エミツタフオロワ
用トランジスタTR2等から構成されている。7
は検波回路(第2図aの7に対応)で、図中D
1,D2ではダイオードを示す。8は振幅変化率
弁別回路(第2図aに対応)で、弁別用比較器と
しての演算増幅器IC1とこの演算増幅器IC1の
非反転側入力段に設けられた抵抗R、コンデンサ
Cからなる積分回路から構成されている。9は弁
別しきい値設定回路(第2図aの9に対応)で、
設定しきい値調整用ポテンシヨメータVR2が用
いられている。10は弁別結果の記憶回路(第2
図aの10に対応)で、トランジスタTR3及び
TR4によるフリツプ・フロツプ回路で構成され
ている。11は弁別結果の表示回路(第2図aの
11に対応)で、表示用発光ダイオードLED
1,LED2から構成されている。12は弁別記
憶のリセツト回路(第2図aの12に対応)で、
リセツト用押釦スイツチPB1が用いられてい
る。 Next, FIG. 3 shows a specific electric circuit according to the block configuration example shown in FIG. 2a. 3
a is the connection cable (corresponds to 3a in Figure 2 a), 4
is a matching transformer (corresponding to 4 in FIG. 2a), and a matching high frequency transformer T1 is used. 5 is a characteristic adjustment circuit (corresponding to 5 in Figure 2 a) variable resistor
The electrical characteristics of the high frequency circuit are adjusted by VR1 and variable capacitor VC1. Reference numeral 6 denotes an oscillation circuit (corresponding to FIG. 2a), which is composed of an oscillation coil T2, an oscillation high-frequency transistor TR1, an emitter follower transistor TR2, and the like. 7
is a detection circuit (corresponding to 7 in Figure 2 a), and D in the figure
1 and D2 indicate diodes. 8 is an amplitude change rate discrimination circuit (corresponding to FIG. 2a), which is an integrating circuit consisting of an operational amplifier IC1 as a discrimination comparator, a resistor R provided at the non-inverting input stage of this operational amplifier IC1, and a capacitor C. It consists of 9 is a discrimination threshold setting circuit (corresponding to 9 in Fig. 2a);
A potentiometer VR2 for adjusting the set threshold value is used. 10 is a storage circuit (second
(corresponding to 10 in figure a), transistor TR3 and
It consists of a flip-flop circuit using TR4. 11 is a display circuit for the discrimination result (corresponding to 11 in Figure 2a), which is a light emitting diode LED for display.
1. Consists of 2 LEDs. 12 is a reset circuit for discrimination memory (corresponding to 12 in FIG. 2a);
A reset push button switch PB1 is used.
次に上記のように構成された溶接用倣い検出装
置の作用を説明する。 Next, the operation of the welding tracing detection device configured as described above will be explained.
第4図は、第2図、第3図に示す回路構成によ
り作動させた場合の、第3図中のA,B,C,
D,E,Fの各点に於ける電圧実測結果を示すも
のである。 Figure 4 shows A, B, C in Figure 3 when operated with the circuit configuration shown in Figures 2 and 3.
It shows the actual voltage measurement results at each point D, E, and F.
今、第2図及び第3図において、被溶接材1と
溶接ワイヤ2とが隔離した状態から、両者が接触
すると被溶接材1、溶接ワイヤ2、高周波バイパ
スコンデンサCHF、溶接ケーブル2a、被溶接材
1に至る閉回路が形成され、誘導コイル3のイン
ダクタンスが変化する。この誘導コイル3のイン
ダクタンスが変化すると誘導コイル3、整合トラ
ンス4、特性調整回路5及び高周波発振回路6か
らなる高周波発振回路網の回路定数が変化し、第
3図のA点の電圧は第4図aに示すように発振高
周波の振幅(電圧)が変化する。このA点電圧が
検波回路7に入力されると検波作用により検波さ
れ、第3図のB点には溶接ワイヤ2と被溶接材1
との接触による高周波発振電圧に対応して変化し
た第4図bに示すような直流電圧が現われる。こ
のB点の直流電圧は第4図bに示すように振幅変
化率弁別回路8の弁別比較器IC1の反転側入力
端に印加され、また弁別比較器IC1の非反転側
入力端にはB点電圧をC,Rからなる積分回路に
より積分された第4図dに示すような電圧が印加
される。また、この弁別比較器IC1にはしきい
値設定回路9により予め調整された電圧がオフセ
ツト電圧として与えられている。したがつて、弁
別比較器IC1の反転入力端及び非反転入力端に
第4図c及びdに示す電圧が印加されると弁別比
較器IC1では同相入力に対してその出力が負の
値となり、また反転側入力電圧より非反転側入力
電圧が大となる入力に対してはその期間だけ正の
値となるパルス状の出力となり、第4図eに示す
ような電圧が得られる。この場合、パルス状出力
のパルス幅(第4図dにおけるΔt)は第3図の
D点に係わるC,Rの積分回路の時定数によりお
およそ決まる。このようなパルス状の出力が第3
図のE点からフリツプフロツプ記憶回路10に入
力されると、このフリツプフロツプ記憶回路10
はセツトされ、第3図のF点には第4図fに示す
ような出力電圧が現われる。この出力電圧は第4
図fからも分るように溶接ワイヤ2と被溶接材1
との接触に伴う高周波発振電圧の変化量には余り
拘りなく、その変化率の大なる点に着目し、これ
を明確な直流電圧の変化として出力する。したが
つて、この出力電圧により溶接トーチの当該座標
を自動的に読込むことにより、正しい溶接継手の
位置が記憶される。なお、表示回路11は溶接ワ
イヤ2と被溶接材1との間が隔離している期間表
示用発光ダイオードLED2が点灯し、また両者
が接触した瞬間から表示用発光ダイオードLED
1が点灯するようになつており、両者の相対位置
関係が表示できる機能を有している。 Now, in FIGS. 2 and 3, when the material to be welded 1 and the welding wire 2 come into contact with each other from the isolated state, the material to be welded 1, the welding wire 2, the high frequency bypass capacitor C HF , the welding cable 2a, and the welding wire 2 are separated. A closed circuit reaching the welding material 1 is formed, and the inductance of the induction coil 3 changes. When the inductance of the induction coil 3 changes, the circuit constant of the high frequency oscillation circuit network consisting of the induction coil 3, matching transformer 4, characteristic adjustment circuit 5 and high frequency oscillation circuit 6 changes, and the voltage at point A in FIG. As shown in Figure a, the amplitude (voltage) of the oscillated high frequency wave changes. When this point A voltage is input to the detection circuit 7, it is detected by the detection action, and the welding wire 2 and the welded material 1 are detected at the point B in FIG.
A DC voltage as shown in FIG. 4b appears, which varies in response to the high frequency oscillation voltage caused by contact with the contact point. This DC voltage at point B is applied to the inverting side input terminal of the discrimination comparator IC1 of the amplitude change rate discriminating circuit 8, and the non-inverting side input terminal of the discrimination comparator IC1 is applied to the point B. A voltage as shown in FIG. 4d, which is obtained by integrating the voltage by an integrating circuit composed of C and R, is applied. Further, a voltage adjusted in advance by a threshold setting circuit 9 is applied to the discrimination comparator IC1 as an offset voltage. Therefore, when the voltages shown in FIG. 4c and d are applied to the inverting input terminal and the non-inverting input terminal of the discrimination comparator IC1, the output of the discrimination comparator IC1 becomes a negative value with respect to the in-phase input, Further, for an input in which the non-inverting input voltage is higher than the inverting input voltage, a pulse-like output having a positive value only during that period is obtained, and a voltage as shown in FIG. 4e is obtained. In this case, the pulse width of the pulsed output (Δt in FIG. 4d) is approximately determined by the time constant of the C and R integration circuits related to point D in FIG. 3. This kind of pulse-like output is the third
When input to the flip-flop memory circuit 10 from point E in the figure, this flip-flop memory circuit 10
is set, and an output voltage as shown in FIG. 4 f appears at point F in FIG. This output voltage is
As can be seen from Figure f, welding wire 2 and workpiece 1
It does not pay much attention to the amount of change in the high frequency oscillation voltage caused by contact with the object, but focuses on the point where the rate of change is large, and outputs this as a clear change in DC voltage. Therefore, by automatically reading the coordinates of the welding torch using this output voltage, the correct position of the weld joint is memorized. In addition, in the display circuit 11, the display light emitting diode LED 2 lights up during the period when the welding wire 2 and the workpiece 1 are isolated, and the display light emitting diode LED 2 lights up from the moment the two come into contact.
1 lights up, and has the function of displaying the relative positional relationship between the two.
このように上記した実施例からも明らかなよう
に本発明では高周波電流の誘導印加とインダクタ
ンス弁別とによる溶接用ワイヤセンス方式を導入
するようにしたので次のような効果を得ることが
できる。 As is clear from the above-described embodiments, the present invention introduces a welding wire sensing method using induced application of high-frequency current and inductance discrimination, so that the following effects can be obtained.
高周波誘導コイルによる間接印加・検出方式
としてあるので、母機本体の運転操作に伴なつ
て発生するノイズに妨害させる可能性が極めて
低い。 Since this is an indirect application/detection method using a high-frequency induction coil, there is an extremely low possibility of interference from noise generated during operation of the main unit.
既存母機への装着は極めて簡単で、且つ、従
来方式のような切替スイツチの取付け等の改造
は一切不要である。 It is extremely easy to install on an existing mother machine, and there is no need for any modifications such as installing a changeover switch as in the conventional system.
誘導コイルを含む高周波発振回路は、溶接ワ
イヤと被溶接材との間の接触の有無により発振
振幅の変化が大きくなるように回路中のC,
R,L定数を設定してあるので、検出感度が極
めて高く、従つてワイヤ先端或は被溶接材継手
付近の表面状態に左右されることなく、安定な
検出機能を発揮させることが出来る。 A high-frequency oscillation circuit including an induction coil has C,
Since the R and L constants are set, the detection sensitivity is extremely high, and therefore a stable detection function can be achieved without being affected by the surface condition near the wire tip or the joint of the welded material.
また溶接ワイヤと被溶接材との間の接触による
誘導コイルのインダクタンス変化速度を検出し、
弁別するようにしているので、被検出回路を含む
回路のインダクタンス絶対値には余り影響され
ず、操作性に優れたものとなる。 It also detects the rate of change in inductance of the induction coil due to contact between the welding wire and the material to be welded,
Since the discrimination is made, the absolute value of inductance of the circuit including the circuit to be detected does not affect much, resulting in excellent operability.
さらに主要部分は簡単なアナログ回路で構成し
ているので低コストで実現出来るばかりでなく、
溶接関連設備の自動化、ロボツト化には省人化の
実現に有力な手掛りを与えることが可能であり、
しかも溶接ロボツト或は自動溶接装置の機能向上
とコスト低減により市場競争力が強化されるとい
う利点もある。 Furthermore, since the main parts are composed of simple analog circuits, it can not only be realized at low cost, but also
Automation and robotization of welding-related equipment can provide a powerful clue to realizing labor savings.
Moreover, there is also the advantage that market competitiveness is strengthened by improving the functionality and reducing costs of welding robots or automatic welding equipment.
以上述べたように本発明によれば、ワイヤセン
ス方式において溶接ワイヤ先端と被溶接材との間
が接触すると、溶接ワイヤ、被溶接材、溶接側ケ
ーブルにより高周波短絡閉回路が形成されるよう
に高周波バイパスコンデンサを設けるとともにそ
の閉回路が形成されるとインダクタンスが変化す
るような遊導コイルを設け、この誘導コイルに予
め印加された微弱高周波電流の変化によりインダ
クタンスの変化速度(変化率)を検出して溶接ワ
イヤと被溶接材との間の接触を瞬時に検知するよ
うにしたので、簡単な機構で装着、取扱いの容易
な且つ溶接ワイヤと被溶接材との間の接触状態に
左右されることなく安定な検出機能を発揮させる
ことが可能となり、しかも被検出回路を含むイン
ダクタンスの絶対値に余り影響されることのない
操作性の優れた溶接用倣い検出装置が提供でき
る。 As described above, according to the present invention, when the tip of the welding wire and the material to be welded come into contact in the wire sense method, a high frequency short circuit is formed by the welding wire, the material to be welded, and the welding side cable. A high-frequency bypass capacitor is provided, and a stray coil whose inductance changes when a closed circuit is formed is provided, and the speed of change (rate of change) of the inductance is detected by changes in the weak high-frequency current applied to this induction coil in advance. Since the contact between the welding wire and the material to be welded is detected instantaneously, it is easy to install and handle with a simple mechanism, and it does not depend on the state of contact between the welding wire and the material to be welded. Therefore, it is possible to provide a welding tracing detection device that can exhibit a stable detection function without any interference, and has excellent operability and is not significantly influenced by the absolute value of inductance including the circuit to be detected.
第1図a,bは従来の異なるワイヤセンス方式
を説明するための構成図、第2図a〜cは本発明
の一実施例を示すもので、aは突合せ溶接継手に
適用する場合のブロツク構成図、bはすみ肉溶接
継手に適用する場合の構成図、cは誘導コイルの
詳細を示す構成図、第3図は同実施例の具体的回
路構成図、第4図a〜fは同実施例の作用説明に
用いられる第3図の各部の電圧波形図である。
1……被溶接材、2……溶接ワイヤ、2a……
溶接側ケーブル、3……誘導コイル、3a……接
続ケーブル、4……整合トランス、5……特性調
整回路、6……高周波発振回路、7……検波回
路、8……振幅変化率弁別回路、9……弁別しき
い値設定回路、10……弁別結果の記憶回路、1
1……弁別表示回路、12……リセツト回路。
Figures 1a and 1b are block diagrams for explaining different conventional wire sense systems, and Figures 2a to 2c show an embodiment of the present invention, where a is a block diagram when applied to a butt welded joint. Block diagram, b is a block diagram when applied to a fillet welded joint, c is a block diagram showing details of the induction coil, Figure 3 is a specific circuit diagram of the same embodiment, and Figures 4 a to f are the same implementation. FIG. 4 is a voltage waveform diagram of each part in FIG. 3 used to explain the operation of the example. 1... Material to be welded, 2... Welding wire, 2a...
Welding side cable, 3... Induction coil, 3a... Connection cable, 4... Matching transformer, 5... Characteristic adjustment circuit, 6... High frequency oscillation circuit, 7... Detection circuit, 8... Amplitude change rate discrimination circuit , 9...discrimination threshold setting circuit, 10...discrimination result storage circuit, 1
1... Discrimination display circuit, 12... Reset circuit.
Claims (1)
イヤ式自動アーク溶接機の溶接ワイヤと被溶接材
とが接触すると前記溶接ワイヤ、被溶接材、溶接
ケーブルを経て高周波短絡閉回路が形成されるよ
うに設けられた高周波バイパスコンデンサと、前
記高周波短絡閉回路が形成されるとインダクタン
スが変化するように前記高周波短絡閉回路の電路
と鎖交配設された誘導コイルと、この誘導コイル
のインダクタンスの変化に応じて発振周波数の振
幅が変化した出力を得る高周波発振回路と、この
高周波発振回路の出力を検波して直流電圧を得る
検波回路と、比較器或は演算増幅器の反転入力端
及び非反転入力端にそれぞれ相異なる時定数回路
が設けられ前記検波回路で検波された直流電圧を
前記比較器或は演算増幅器の反転入力端及び非反
転入力端に同相印加して前記誘導コイルのインダ
クタンス変化に伴う電圧変化速度を弁別し出力す
る振幅変化速度弁別回路とを備えたことを特徴と
する溶接用倣い検出装置。1. Provided so that when the welding wire of the welding wire type arc welding robot or the welding wire type automatic arc welding machine comes into contact with the welded material, a high frequency short circuit is formed via the welding wire, the welded material, and the welding cable. a high-frequency bypass capacitor connected to the high-frequency short-circuit closed circuit; an induction coil connected to the electric path of the high-frequency short-circuit closed circuit so that the inductance changes when the high-frequency short circuit closed circuit is formed; A high-frequency oscillation circuit that obtains an output with a changed amplitude of the oscillation frequency, a detection circuit that detects the output of this high-frequency oscillation circuit to obtain a DC voltage, and a comparator or operational amplifier that has an inverting input terminal and a non-inverting input terminal, respectively. Different time constant circuits are provided, and the DC voltage detected by the detection circuit is applied in phase to the inverting input terminal and the non-inverting input terminal of the comparator or operational amplifier to adjust the voltage change rate due to the change in inductance of the induction coil. 1. A welding tracing detection device comprising: an amplitude change rate discrimination circuit that discriminates and outputs the amplitude change rate discrimination circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15576783A JPS6046874A (en) | 1983-08-26 | 1983-08-26 | Profiling detector for welding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15576783A JPS6046874A (en) | 1983-08-26 | 1983-08-26 | Profiling detector for welding |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6046874A JPS6046874A (en) | 1985-03-13 |
JPS6234466B2 true JPS6234466B2 (en) | 1987-07-27 |
Family
ID=15612960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15576783A Granted JPS6046874A (en) | 1983-08-26 | 1983-08-26 | Profiling detector for welding |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6046874A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008058753A1 (en) * | 2008-11-17 | 2010-05-20 | Newfrey Llc, Newark | Method and device for determining electrical welding circuit sizes |
-
1983
- 1983-08-26 JP JP15576783A patent/JPS6046874A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6046874A (en) | 1985-03-13 |
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