JPH0646632Y2 - Continuous seam welding monitor - Google Patents
Continuous seam welding monitorInfo
- Publication number
- JPH0646632Y2 JPH0646632Y2 JP1989071505U JP7150589U JPH0646632Y2 JP H0646632 Y2 JPH0646632 Y2 JP H0646632Y2 JP 1989071505 U JP1989071505 U JP 1989071505U JP 7150589 U JP7150589 U JP 7150589U JP H0646632 Y2 JPH0646632 Y2 JP H0646632Y2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- current
- voltage
- continuous seam
- measuring
- 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 - Lifetime
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、連続シーム溶接において加工品の品質管理を
行う装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an apparatus for quality control of a processed product in continuous seam welding.
［従来の技術］ 連続シーム溶接は、金属板の合わせ目または継ぎ目を縫
うように連続的に接合する技術であって缶やタンク等の
液体容器の加工に多く利用されている。[Prior Art] Continuous seam welding is a technique for continuously joining seams or joints of metal plates by sewing, and is widely used for processing liquid containers such as cans and tanks.
このような連続シーム溶接を抵抗溶接によって行うに
は、普通次のようにしている。一対の円盤またはローラ
形の溶接電極を利用し、溶接電圧を印加した状態の下で
これらの溶接電極を回転させながら加工品の被接合部
（金属板の合わせ目または継ぎ目等）を両電極間に通す
ことにより被接合部を抵抗溶接で連続的に接合する。In order to perform such continuous seam welding by resistance welding, the following is usually done. Using a pair of disc-shaped or roller-shaped welding electrodes, rotate these welding electrodes under the condition that a welding voltage is applied, and connect the workpiece joint (metal plate seam or joint) between both electrodes. The parts to be joined are continuously joined by resistance welding.
［考案が解決しようとする課題］ ところで、連続シーム溶接においては、溶接電極に対し
て加工品の被溶接部が移動し、電流路が時時刻刻と変化
するために、閉ループの定電流制御をかけることができ
ず、閉ループ方式で溶接電圧・電流を供給する。[Problems to be solved by the invention] By the way, in continuous seam welding, since the welded portion of the workpiece moves relative to the welding electrode and the current path changes with time, closed-loop constant current control is performed. It cannot be applied and supplies welding voltage and current in a closed loop system.
しかし、加圧力や電源電圧の変動、異物の介在等の原因
で連続シーム溶接の途中で部分的に溶接不良を起こすこ
とがあり、加工品が液体容器の場合はその溶接不良箇所
から液体が漏れるおそれがある。この点に関して、従来
より、溶接状態と溶接電流とが相関関係を有することを
利用し、交流溶接電流の各1/2サイクルにおける電流の
ピークを基準上限値および基準下限値と比較して、電流
ピーク値が両限界値の間にあるときには溶接が適であ
り、電流ピーク値が両限界値より外へ出たときに溶接が
不適であると判定するようにした溶接適否判別法が知ら
れている。しかし、この方式は、連続シーム溶接機に特
有な溶接状況を正確にモニタできるわけではなかった。
すなわちスポット溶接機と異なって、連続シーム溶接機
では、一対のローラ形溶接電極の間に常時電圧と加圧力
が印加され、溶接電極間に被溶接材がないときでもほぼ
一定の溶接電流が流れている。したがって、上記従来方
式のように溶接電流が基準限界値の範囲内にあるか否か
を監視しただけでは、溶接部の状況を正確にモニタする
ことはできなかった。また、従来方式では、溶接不適の
判定結果を基に不良品を選別しても、その不良品のどの
位置または箇所が溶接不適なのかが分からないため、原
因を調べるうえで、あるいは不良品を再溶接して良品化
するうえで不便があった。However, welding defects may partially occur during continuous seam welding due to pressure force, power supply voltage fluctuations, inclusion of foreign matter, etc.When the processed product is a liquid container, liquid leaks from the defective welding point. There is a risk. In this regard, conventionally, by utilizing the fact that the welding state and the welding current have a correlation, the peak of the current in each 1/2 cycle of the AC welding current is compared with the reference upper limit value and the reference lower limit value, and the current Welding suitability determination method is known in which it is determined that welding is suitable when the peak value is between both limit values, and welding is not suitable when the current peak value goes out of both limit values. There is. However, this method cannot accurately monitor the welding condition peculiar to the continuous seam welder.
That is, unlike a spot welder, in a continuous seam welder, a voltage and pressure are constantly applied between a pair of roller-type welding electrodes, and a substantially constant welding current flows even when there is no material to be welded between the welding electrodes. ing. Therefore, the situation of the welded portion cannot be accurately monitored only by monitoring whether or not the welding current is within the range of the reference limit value as in the above conventional method. In addition, in the conventional method, even if a defective product is selected based on the result of determination of welding unsuitability, it is not known which position or location of the defective product is unsuitable for welding. It was inconvenient to re-weld and make it a good product.
本考案は、かかる問題点に鑑みてなされたもので、連続
シーム溶接の加工段階で加工の品質管理を正確に行うと
ともに、歩止まりの向上をはかる連続シーム溶接モニタ
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 an object thereof is to provide a continuous seam welding monitor device capable of accurately performing quality control of processing at the processing stage of continuous seam welding and improving yield. To do.
［課題を解決するための手段］ 上記の目的を達成するために、本考案の第１の連続シー
ム溶接モニタ装置は、連続シーム溶接機において、一定
サイクル毎に溶接電流を測定する溶接電流測定手段と、
前記溶接電流の測定値を逐次所定の上限または下限電流
基準値と比較する第１の比較手段と、一定サイクル毎に
溶接電極間の電圧を測定する電極間電圧測定手段と、前
記溶接電極間電圧の測定値を逐次所定の上限または下限
電圧基準値と比較する第２の比較手段と、前記第１およ
び第２の比較手段の比較結果にしたがって溶接の良また
は不良を表す判定信号を出力する判定出力手段と、前記
判定出力手段より溶接不良を表す前記判定信号が出力さ
れたときに警報を出力する警報出力手段とを具備する構
成とした。[Means for Solving the Problems] In order to achieve the above object, the first continuous seam welding monitor device of the present invention is a continuous seam welding machine, and a welding current measuring means for measuring a welding current at every constant cycle. When,
First comparing means for sequentially comparing the measured value of the welding current with a predetermined upper or lower current reference value, inter-electrode voltage measuring means for measuring the voltage between the welding electrodes at constant cycles, and the welding inter-electrode voltage Second comparison means for sequentially comparing the measured value of 1 with a predetermined upper or lower limit voltage reference value, and determination for outputting a determination signal indicating good or bad welding according to the comparison result of the first and second comparison means. It is configured to include an output unit and an alarm output unit that outputs an alarm when the determination signal indicating welding failure is output from the determination output unit.
また、本考案の第２の連続シーム溶接モニタ装置は、連
続シーム溶接機において、一定サイクル毎に溶接電流を
測定する溶接電流測定手段と、前記溶接電流の測定値を
逐次所定の上限または下限電流基準値と比較する第１の
比較手段と、一定サイクル毎に溶接電極間の電圧を測定
する電極間電圧測定手段と、前記溶接電極間電圧の測定
値を逐次所定の上限または下限電圧基準値と比較する第
２の比較手段と、前記第１および第２の比較手段の比較
結果にしたがって溶接の良または不良を表す判定信号を
出力する判定出力手段と、各サイクルに対応する溶接ポ
イントの位置を表すデータを発生する位置データ発生手
段と、前記判定出力手段からの判定信号と前記位置デー
タ発生手段からの位置データとに基づいて溶接不良の位
置を示すデータを発生する溶接不良位置データ発生手段
とを具備する構成とした。The second continuous seam welding monitoring device of the present invention is a continuous seam welding machine, wherein a welding current measuring means for measuring a welding current at a constant cycle and a measured upper limit value or a lower limit current of the welding current are successively measured. First comparing means for comparing with a reference value, inter-electrode voltage measuring means for measuring a voltage between welding electrodes at a constant cycle, and a measured value of the welding electrode voltage with a predetermined upper or lower limit voltage reference value. The second comparison means for comparison, the determination output means for outputting a determination signal indicating good or bad welding according to the comparison result of the first and second comparison means, and the position of the welding point corresponding to each cycle are shown. Position data generating means for generating the data representing the data, data indicating the position of the welding defect based on the judgment signal from the judgment output means and the position data from the position data generating means. It has a configuration comprising a welding defect position data generating means for raw.
［作用］ 第１の連続シーム溶接モニタ装置では、溶接電流だけで
なく、溶接電極間電圧についても一定サイクル毎に測定
が行われ、電圧測定値が所定の上限電圧基準値を越えた
かどうか、あるいは所定の下限電圧基準値を割ったかど
うかが逐次比較処理で検査される。そして、溶接電流に
ついての比較結果と溶接電極間電圧についての比較結果
とから溶接良・不良の判定が出され、不良のときは警報
が出力される。したがって、連続シーム溶接機におい
て、たとえば溶接電極に加工品が挟まっていないとき
は、たとえ溶接電流が適正値で流れていても、溶接電極
間電圧が適正値にならないため、不良または異常事態を
検出することができる。[Operation] In the first continuous seam welding monitor, not only the welding current but also the voltage between the welding electrodes is measured at every constant cycle, and whether or not the measured voltage value exceeds a predetermined upper limit voltage reference value, or Whether or not a predetermined lower limit voltage reference value is divided is checked by the successive approximation process. Then, it is determined whether the welding is good or bad based on the comparison result of the welding current and the comparison result of the voltage between the welding electrodes, and an alarm is output when the welding is defective. Therefore, in a continuous seam welder, when a workpiece is not sandwiched between welding electrodes, for example, even if the welding current is flowing at an appropriate value, the voltage between welding electrodes does not reach an appropriate value, so a defect or abnormal situation is detected. can do.
第２の連続シーム溶接モニタ装置では、各溶接ポイント
についての位置データと溶接良・不良の判定結果とが結
合され、不良が発生すれば、その不良箇所の位置を示す
データが発生される。したがって、不良と判定された加
工品については不良箇所にのみ所要の手当てをするだけ
で良品化できるので、容易かつ効率的に製品歩止まりを
上げることができる。In the second continuous seam welding monitor, the position data for each welding point and the welding good / bad determination result are combined, and if a defect occurs, data indicating the position of the defective portion is generated. Therefore, the processed product determined to be defective can be made into a good product only by performing necessary treatment only on the defective portion, so that the product yield can be easily and efficiently increased.
［実施例］ 第１図は、本考案の一実施例による連続シーム溶接モニ
タ装置を適用した連続シーム溶接機の要部の構成を示
す。[Embodiment] FIG. 1 shows a configuration of a main part of a continuous seam welding machine to which a continuous seam welding monitor device according to an embodiment of the present invention is applied.
一対の円盤またはローラ形の溶接電極10,12は、それぞ
れ導電性のアーム14,16に支持され、回転駆動手段（図
示せず）により矢印A0,A1の方向に回転駆動される。こ
れらの溶接電極10,12には、加圧機構（図示せず）によ
り加圧が加えられるとともに、電極回路（図示せず）よ
り位相制御された交流と溶接電圧Ｅがアーム14,16を介
して印加される。The pair of disc-shaped or roller-shaped welding electrodes 10 and 12 are supported by conductive arms 14 and 16, respectively, and are rotationally driven in the directions of arrows A0 and A1 by rotational driving means (not shown). Pressurization is applied to these welding electrodes 10 and 12 by a pressurizing mechanism (not shown), and AC and welding voltage E whose phases are controlled by an electrode circuit (not shown) are passed through arms 14 and 16. Applied.
この例のワークピース18は、一枚の金属板18′からなる
丸い缶の円周部であり、その合わせ目または継ぎ目18a
が被溶接部である。したがって、鎖線18″で示すように
して被溶接部18aが両電極10,12の間を通るよう、ワーク
ピース18は搬送機構（図示せず）によって矢印Ｆの方向
に移送される。その際、アーム14,16および溶接電極10,
12を介して被溶接部18a″に溶接電流が流れ、そこの被
溶接部18a″が抵抗溶接で接合される。かかる連続シー
ム溶接機の構成・動作は従来通りのものである。The work piece 18 in this example is the circumference of a round can made of a single metal plate 18 ', and its seam or joint 18a.
Is the welded part. Therefore, the work piece 18 is transferred in the direction of the arrow F by the transfer mechanism (not shown) so that the welded portion 18a passes between the electrodes 10 and 12 as indicated by the chain line 18 ″. Arms 14, 16 and welding electrodes 10,
A welding current flows through the welded portion 18a ″ via 12 and the welded portion 18a ″ there is joined by resistance welding. The structure and operation of such a continuous seam welder are conventional.
さて、上記の連続シーム溶接機に本実施例の連続シーム
溶接モニタ装置20が取り付けられる。このモニタ装置20
は、溶接電流系のモニタ部と溶接電圧系のモニタ部とを
備える。Now, the continuous seam welding monitor 20 of the present embodiment is attached to the above continuous seam welder. This monitor device 20
Includes a welding current system monitor unit and a welding voltage system monitor unit.
電流系のモニタ部は、アーム14に取り付けられた電流セ
ンサ、例えばトロイダルコイル22、積分回路24、電流実
効値演算回路26、コンパレータ28および基準値発生回路
30からなる。トロイダルコイル22は溶接電流Ｉの微分波
形を表す電圧信号viを出力し、この電圧信号viは積分回
路24によって溶接電流Ｉを表す電圧信号Viに変換され
る。電流実効値演算回路26は、積分回路24からの電圧信
号Viについて商用交流の半サイクル毎に実効値（溶接電
流実効値）を演算し、その演算値つまり溶接電流の測定
値IRを表す出力信号SIRを逐次コンパレータ28に対して
出力する。コンパレータ28は、基準値発生回路30より、
予め設定された上限電流基準値Uiおよび下限電流基準Li
を入力し、溶接電流測定値IRをそれらの基準値Ui,Liと
比較する。そして、溶接電流測定値IRが上限電流基準値
Uiを越えた時、または下限電流基準値Liを割った時に論
理“H"を、それ以外つまり溶接電流測定値IRが上限およ
び下限電流基準値Ui,Liの範囲内にある時は論理“L"を
比較結果信号Ciとして出力する。The current system monitor includes a current sensor attached to the arm 14, such as a toroidal coil 22, an integrating circuit 24, a current effective value calculating circuit 26, a comparator 28 and a reference value generating circuit.
It consists of 30. The toroidal coil 22 outputs a voltage signal vi representing the differential waveform of the welding current I, and this voltage signal vi is converted into a voltage signal Vi representing the welding current I by the integrating circuit 24. The current effective value calculating circuit 26 calculates an effective value (welding current effective value) for each half cycle of the commercial AC for the voltage signal Vi from the integrating circuit 24, and outputs the calculated value, that is, the measured value IR of the welding current. The SIR is sequentially output to the comparator 28. The comparator 28 uses the reference value generation circuit 30 to
Preset upper limit current reference value Ui and lower limit current reference Li
, And compare the measured welding current value IR with their reference values Ui, Li. The welding current measurement value IR is the upper limit current reference value.
When Ui is exceeded or when the lower limit current reference value Li is divided, a logic "H" is set, otherwise when the measured welding current IR is within the upper and lower limit current reference values Ui, Li, a logical "L""Is output as the comparison result signal Ci.
電圧系のモニタ部は、その入力端子がライン32,34を介
してアーム14,16の溶接電極10,12に近接する部分に接続
されたバッファ・アンプ36、電圧実効値演算回路38、コ
ンパレータ40および基準値発生回路30からなる。両溶接
電極10,12の間に印加される溶接電圧Ｅは、バッファ・
アンプ36を介して電圧実効値演算回路38に入力され、こ
こで商用交流の半サイクル毎に溶接電圧Ｅの実効値が演
算され、その演算値つまり溶接電圧の測定値ERを表す出
力信号SERが逐次得られる。この信号SERは、コンパレー
タ40に入力され、そこで基準値発生回路30からの予め設
定された上限電圧基準値Ueおよび下限電圧基準値Leと比
較される。その結果溶接電圧測定値ERが上限電圧基準値
Ueを越えた時、または下限電圧基準値Leを割った時に論
理“H"が、それ以外つまり溶接電圧測定値ERが上限およ
び下限電圧基準値Ue,Leの範囲内にある時は論理“L"が
比較結果信号Ceとしてコンパレータ40の出力端子に得ら
れる。コンパレータ40の出力端子は、電流モニタ系のコ
ンパレータ28の出力端子とともに、判定出力手段として
のオアゲート42の入力端子に接続される。The monitor section of the voltage system has a buffer amplifier 36 whose input terminals are connected to the portions of the arms 14 and 16 near the welding electrodes 10 and 12 via lines 32 and 34, a voltage effective value calculation circuit 38, and a comparator 40. And a reference value generation circuit 30. The welding voltage E applied between the two welding electrodes 10 and 12 is
It is input to the voltage effective value calculation circuit 38 via the amplifier 36, where the effective value of the welding voltage E is calculated every half cycle of commercial AC, and the calculated value, that is, the output signal SER representing the measured value ER of the welding voltage is output. Obtained one after another. This signal SER is input to the comparator 40, where it is compared with preset upper limit voltage reference value Ue and lower limit voltage reference value Le from the reference value generating circuit 30. As a result, the welding voltage measured value ER is the upper limit voltage reference value.
Logic "H" is output when Ue is exceeded or when lower limit voltage reference value Le is divided. Otherwise, logic "L" is set when welding voltage measurement value ER is within the upper and lower limit voltage reference values Ue, Le. "Is obtained as the comparison result signal Ce at the output terminal of the comparator 40. The output terminal of the comparator 40 is connected to the input terminal of the OR gate 42 as the judgment output means together with the output terminal of the current monitor comparator 28.
第２図は、上述した連続シーム溶接モニタ装置20の動作
の一例を示すタイミング図である。この例では、第11番
目の半サイクルで、異物介在等の原因により突然に溶接
電圧Ｅが上昇し溶接電圧Ｉが減少し（第２図（Ａ），
（Ｂ））、それに応じて溶接電流測定値IRが下限電流基
準値Liを割ると同時に溶接電圧測定値ERが上限電圧基準
値Ueを越え（第２図（Ｃ），（Ｄ））、その結果電流，
電圧系両モニタのコンパレータ28,40より“H"の比較結
果信号Ci,Ceが出力され、したがってオアゲート42の出
力信号は“H"になる（第２図（Ｅ））。他の半サイクル
では、溶接電流I,溶接電圧Ｅは略々正常で、それぞれの
測定値IR,ERは上限・下限基準の範囲内にあり、オアゲ
ート42の出力信号FGは“L"である。しかし、一度でも
“H"の出力信号が発生された以上、溶接不良の箇所があ
ることを意味するので、後段の適当な表示手段で警報が
出される。その結果、作業員は当該ワークピースを不良
品として処理する。FIG. 2 is a timing chart showing an example of the operation of the continuous seam welding monitor device 20 described above. In this example, in the eleventh half cycle, the welding voltage E suddenly rises and the welding voltage I decreases due to the presence of foreign matter or the like (see FIG. 2 (A),
(B)), and accordingly, the welding current measurement value IR falls below the lower limit current reference value Li and at the same time the welding voltage measurement value ER exceeds the upper limit voltage reference value Ue (Figs. 2 (C) and (D)), Resulting current,
Comparison result signals Ci and Ce of "H" are output from the comparators 28 and 40 of both voltage system monitors, so that the output signal of the OR gate 42 becomes "H" (FIG. 2 (E)). In the other half cycle, the welding current I and the welding voltage E are substantially normal, the respective measured values IR and ER are within the upper and lower reference ranges, and the output signal FG of the OR gate 42 is "L". However, even if the "H" output signal is generated even once, it means that there is a defective welding portion, so an alarm is issued by an appropriate display means in the subsequent stage. As a result, the worker treats the workpiece as a defective product.
この例では、溶接電流測定値IRが下限電流基準値Liを割
り、溶接電圧測定値ERが上限電圧基準値Ueを越えた場合
であったが、溶接電流測定値IRが上限電流基準値Uiを越
えるか、または溶接電圧測定値ERが下限電圧基準値Leを
割った場合でも、オアゲート42の出力信号FGは“H"とな
る。つまり、この場合は、スプラッシュが発生するよう
な場合であるという意味で、溶接不良の判定信号が出さ
れる。In this example, the welding current measurement value IR divided the lower limit current reference value Li and the welding voltage measurement value ER exceeded the upper limit voltage reference value Ue, but the welding current measurement value IR exceeded the upper limit current reference value Ui. Even if the welding voltage measurement value ER is exceeded or the welding voltage measurement value ER is less than the lower limit voltage reference value Le, the output signal FG of the OR gate 42 becomes “H”. That is, in this case, a welding failure determination signal is issued in the sense that splash occurs.
第３図は、モニタ装置20の出力部の変形例を示す。これ
は、オアゲート42より“H"の出力信号（不良判定信号）
が発生されたなら、これを保持するためにフリップ・フ
ロップ回路50を設けたものである。FIG. 3 shows a modification of the output section of the monitor device 20. This is an output signal of "H" from the OR gate 42 (defective judgment signal)
If a signal is generated, a flip-flop circuit 50 is provided to hold it.
第４図は、連続シーム溶接の各半サイクル毎に溶接の良
否を記録しておくための回路を付加したものである。タ
イミング回路52は商用交流ECに同期した半サイクル周波
数のクロック信号CKを発生し、カウンタ54は各半サイク
ル毎の溶接ポイントの位置を示すデータPDを発生し、溶
接良否記録回路56は各溶接位置データPDに対する判定信
号FGの状態（“H",“L"）を記憶しておいて、各溶接ポ
イントでの溶接良否を示すデータJDを発生する。このデ
ータJDから、不良品として判定されたワークピースの不
良箇所がわかるので、再加工をする場合に便利である。FIG. 4 shows the addition of a circuit for recording the quality of welding for each half cycle of continuous seam welding. The timing circuit 52 generates a clock signal CK having a half cycle frequency synchronized with the commercial AC EC, the counter 54 generates data PD indicating the position of the welding point for each half cycle, and the welding quality recording circuit 56 determines the welding position. The state (“H”, “L”) of the determination signal FG corresponding to the data PD is stored, and the data JD indicating the quality of welding at each welding point is generated. This data JD is useful for reworking because the defective part of the workpiece determined as a defective product can be known.
第５図は、モニタ装置20の判定結果にしたがって、ワー
クピース選別装置58に自動的に不良品を排除させるよう
にしたものである。このような機構を設けることによ
り、良品・不良品選別のための作業員も要らなくなる。
選別装置58は既知の機構のもので、ワークピース搬送装
置の途中に設けることができる。In FIG. 5, the work piece sorting apparatus 58 is made to automatically exclude defective products according to the judgment result of the monitor apparatus 20. By providing such a mechanism, an operator for selecting a good product and a defective product is not required.
The sorting device 58 has a known mechanism and can be provided in the middle of the workpiece transfer device.
なお、上記の実施例では、半サイクル毎に溶接電流，電
圧の測定値を演算して基準値と比較したが、連続シーム
溶接の加工速度等に応じて１サイクル毎や２サイクル毎
等に演算処理を行うようにしてもよい。また、溶接電流
系、電圧系のそれぞれについてモニタ部を備えたが、い
ずれか１つだけにするのも可能である。In the above embodiment, the measured values of the welding current and voltage were calculated every half cycle and compared with the reference value. However, they are calculated every one cycle or every two cycles according to the processing speed of continuous seam welding. You may make it process. Further, although the monitor unit is provided for each of the welding current system and the voltage system, it is possible to provide only one of them.
［考案の効果］ 本考案は、上述したような構成を有することにより、次
のような効果を奏する。[Effects of the Invention] The present invention has the following effects by having the above-described configuration.
請求項１の連続シーム溶接モニタ装置によれば、溶接電
流だけでなく、溶接電極間電圧についても一定サイクル
毎に測定値が所定の基準値の範囲内にあるか否かを比較
処理し、溶接電流および溶接電極間電圧の双方の比較結
果に基づいて溶接良・不良の判定結果を出すようにした
ので、連続シーム溶接機に固有の溶接状況を正確にモニ
タすることができる。According to the continuous seam welding monitoring apparatus of claim 1, not only the welding current but also the voltage between the welding electrodes is subjected to comparison processing for every constant cycle to determine whether or not the measured value is within a predetermined reference value range. Since the determination result of good or bad welding is output based on the comparison result of both the current and the voltage between the welding electrodes, the welding condition unique to the continuous seam welder can be accurately monitored.
請求項２の連続シーム溶接モニタ装置によれば、溶接不
良品について不良箇所の位置の情報を与えるため、不良
品を効率的に良品化することができ、製品歩止まりの向
上をはかれる。According to the continuous seam welding monitoring device of the second aspect, since the information on the position of the defective portion is given to the defective welding product, the defective product can be efficiently made into a good product, and the product yield can be improved.
第１図は、本考案の一実施例による連続シーム溶接モニ
タ装置を適用した連続シーム溶接機の要部の構成を示す
斜視図、 第２図は、実施例による連続シーム溶接モニタ装置の動
作の一例を示す各部のタイミング図、 第３図は、実施例のモニタ装置の出力部の変形例を示す
ブロック図、 第４図は、連続シーム溶接の各半サイクル毎に溶接の良
否を記録しておくための回路を付加した変形例を示すブ
ロック図、 第５図は、実施例のモニタ装置の判定結果にしたがって
良品と不良品を分けるようにしたシステムの一例を示す
ブロック図である。 10,12……溶接電極、 18,18′,18″……ワークピース、 20……連続シーム溶接モニタ装置、 26……電流実効値演算回路、 28,40……コンパレータ、 30……基準値発生回路、 38……電圧実効値演算回路、 42……コンパレータ、 58……ワークピース選別装置。FIG. 1 is a perspective view showing a configuration of a main part of a continuous seam welding machine to which a continuous seam welding monitor apparatus according to an embodiment of the present invention is applied, and FIG. 2 is an operation of the continuous seam welding monitor apparatus according to the embodiment. FIG. 3 is a timing chart of each part showing an example, FIG. 3 is a block diagram showing a modified example of the output part of the monitor device of the embodiment, and FIG. 4 is recording the quality of welding for each half cycle of continuous seam welding. FIG. 5 is a block diagram showing a modified example in which a circuit for storing is added, and FIG. 5 is a block diagram showing an example of a system in which a non-defective product and a defective product are classified according to the determination result of the monitor device of the embodiment. 10,12 …… Welding electrode, 18,18 ′, 18 ″ …… Workpiece, 20 …… Continuous seam welding monitor, 26 …… Current effective value calculation circuit, 28,40 …… Comparator, 30 …… Reference value Generating circuit, 38 ... Effective voltage value calculation circuit, 42 ... Comparator, 58 ... Workpiece sorter.
Claims (2)
と、 前記溶接電流の測定値を逐次所定の上限または下限電流
基準値と比較する第１の比較手段と、 一定サイクル毎に溶接電極間の電圧を測定する電極間電
圧測定手段と、 前記溶接電極間電圧の測定値を逐次所定の上限または下
限電圧基準値と比較する第２の比較手段と、 前記第１および第２の比較手段の比較結果にしたがって
溶接の良または不良を表す判定信号を出力する判定出力
手段と、 前記判定出力手段より溶接不良を表す前記判定信号が出
力されたときに警報を出力する警報出力手段と、 を具備することを特徴とする連続シーム溶接モニタ装
置。1. In a continuous seam welder, a welding current measuring means for measuring a welding current at every constant cycle, and a first comparing means for successively comparing the measured value of the welding current with a predetermined upper or lower current reference value. An inter-electrode voltage measuring means for measuring the voltage between the welding electrodes at regular intervals; a second comparing means for sequentially comparing the measured value of the welding electrode voltage with a predetermined upper or lower limit voltage reference value; Judgment output means for outputting a judgment signal indicating good or bad welding according to the comparison result of the first and second comparison means, and an alarm when the judgment output means outputs the judgment signal indicating welding failure. A continuous seam welding monitor device comprising: an alarm output unit for outputting.
と、 前記溶接電流の測定値を逐次所定の上限または下限電流
基準値と比較する第１の比較手段と、 一定サイクル毎に溶接電極間の電圧を測定する電極間電
圧測定手段と、 前記溶接電極間電圧の測定値を逐次所定の上限または下
限電圧基準値と比較する第２の比較手段と、 前記第１および第２の比較手段の比較結果にしたがって
溶接の良または不良を表す判定信号を出力する判定出力
手段と、 各サイクルに対応する溶接ポイントの位置を表すデータ
を発生する位置データ発生手段と、 前記判定出力手段からの判定信号と前記位置データ発生
手段からの位置データとに基づいて溶接不良の位置を示
すデータを発生する溶接不良位置データ発生手段と、 を具備することを特徴とする連続シーム溶接モニタ装
置。2. In a continuous seam welding machine, a welding current measuring means for measuring a welding current at every constant cycle, and a first comparing means for successively comparing the measured value of the welding current with a predetermined upper or lower current reference value. An inter-electrode voltage measuring means for measuring the voltage between the welding electrodes at regular intervals; a second comparing means for sequentially comparing the measured value of the welding electrode voltage with a predetermined upper or lower limit voltage reference value; Judgment output means for outputting a judgment signal representing good or bad welding according to the comparison result of the first and second comparison means, and position data generation means for generating data representing the position of the welding point corresponding to each cycle. , A welding defect position data generating means for generating data indicating the position of the welding defect based on the judgment signal from the judgment output means and the position data from the position data generating means. A continuous seam welding monitor device comprising: a step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989071505U JPH0646632Y2 (en) | 1989-06-19 | 1989-06-19 | Continuous seam welding monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989071505U JPH0646632Y2 (en) | 1989-06-19 | 1989-06-19 | Continuous seam welding monitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0314081U JPH0314081U (en) | 1991-02-13 |
| JPH0646632Y2 true JPH0646632Y2 (en) | 1994-11-30 |
Family
ID=31608595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989071505U Expired - Lifetime JPH0646632Y2 (en) | 1989-06-19 | 1989-06-19 | Continuous seam welding monitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646632Y2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4524443B2 (en) * | 2004-10-01 | 2010-08-18 | 株式会社中山製鋼所 | High-rise fish reef |
| JP4560524B2 (en) * | 2007-02-15 | 2010-10-13 | アキム株式会社 | Welding abnormality detection method, seam welding abnormality detection device, seam welding device |
| TWI411483B (en) * | 2008-06-19 | 2013-10-11 | Akim Corp | Welding anomaly detection method, seam welding abnormal detection device, seam welding device |
| JP5305172B2 (en) * | 2010-06-21 | 2013-10-02 | アキム株式会社 | Welding abnormality detection method, seam welding abnormality detection device, seam welding device |
| JP7519939B2 (en) * | 2021-03-18 | 2024-07-22 | 株式会社アマダ | Intermittent seam welding measuring device and intermittent seam welding measuring method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544685A (en) * | 1977-06-13 | 1979-01-13 | Shinwa Nizai Kk | Method of packing article |
| US4506426A (en) * | 1983-08-30 | 1985-03-26 | The Parker Pen Company | Pocket clip for a writing instrument |
-
1989
- 1989-06-19 JP JP1989071505U patent/JPH0646632Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0314081U (en) | 1991-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4434351A (en) | Method and system for determining weld quality in resistance welding | |
| JPH0646632Y2 (en) | Continuous seam welding monitor | |
| US5081338A (en) | Apparatus and method for monitoring weld quality | |
| US4242561A (en) | Electric seam weld monitoring apparatus and method | |
| JP2001353579A (en) | Device for judging acceptability or unacceptability of quality of welding | |
| JP3087478B2 (en) | Welding quality monitoring device for resistance welding | |
| US5742023A (en) | Method for monitoring a welding machine, method for regulating the welding machine and device for carrying out the method | |
| JPS61199578A (en) | Welding monitoring device in arc welding robot | |
| JPH01197069A (en) | Automatic welding equipment with self diagnosis function | |
| JPH07276075A (en) | Method for detecting abnormality at welding time | |
| KR100270098B1 (en) | Apparatus and method for quality judge of welding | |
| JPH02274385A (en) | Monitoring device for welding condition and time change | |
| JPH02127985A (en) | Spot welding condition automatic setting device | |
| JPH06106362A (en) | Device for monitoring welding quality of resistance welding | |
| JPH0644542Y2 (en) | Inverter resistance welding machine control or measuring device | |
| US3532853A (en) | Arc welding monitor system | |
| JPH0989825A (en) | Method and device for inspection of resistance welded part | |
| JP3396602B2 (en) | Method and apparatus for monitoring welding quality | |
| JPH05508809A (en) | Quality inspection method and equipment for spot welded joints | |
| JP2501156B2 (en) | Welder diagnosis method | |
| JPH06106360A (en) | Resistance welding control or measuring instrument | |
| JPH11151580A (en) | Device for judging normal/defective condition of weld zone and mash seam welding machine using the same | |
| JP2747375B2 (en) | Resistance welding equipment | |
| JPS5914312B2 (en) | Quality assurance and checking method for resistance welds | |
| JPH10137947A (en) | Inspection method for resistance welding and resistance welding equipment |