JPH0451268B2 - - Google Patents
Info
- Publication number
- JPH0451268B2 JPH0451268B2 JP5678287A JP5678287A JPH0451268B2 JP H0451268 B2 JPH0451268 B2 JP H0451268B2 JP 5678287 A JP5678287 A JP 5678287A JP 5678287 A JP5678287 A JP 5678287A JP H0451268 B2 JPH0451268 B2 JP H0451268B2
- Authority
- JP
- Japan
- Prior art keywords
- welded
- plate
- welding
- plate thickness
- thickness
- 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
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
- Resistance Welding (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、重ね抵抗シーム溶接装置、特に、
被溶接板の板厚に応じて溶接条件を自動的に調整
することができる重ね抵抗シーム溶接装置に関す
るものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lap resistance seam welding device, particularly,
The present invention relates to a lap resistance seam welding device that can automatically adjust welding conditions according to the thickness of the plate to be welded.
従来、例えば、電縫管のシーム溶接装置とし
て、加圧ロールに対して素管進行方向上流側に設
けた板厚計と、前記板厚計による板厚の測定結果
を、前記板厚計と前記加圧ロールとの間の距離に
対応して遅延させて後述する制御回路に送るため
の遅延回路と、板厚の測定結果に応じて溶接条件
を制御するための制御回路とを有するものが、特
開昭52−69842号公報に開示されている。
Conventionally, for example, as a seam welding device for electric resistance welded pipes, a plate thickness gauge is provided upstream of the pressure roll in the direction of movement of the raw pipe, and the measurement results of the plate thickness by the plate thickness gauge are measured with the plate thickness gauge. A device having a delay circuit for delaying the delay in accordance with the distance from the pressure roll and sending the signal to a control circuit to be described later, and a control circuit for controlling welding conditions in accordance with the measurement result of the plate thickness. , disclosed in Japanese Patent Application Laid-Open No. 52-69842.
上述した、電縫管のシーム溶接装置を、重ね合
わせた複数枚の被溶接板を溶接するための重ね抵
抗シーム溶接装置に適用することができるが、こ
の場合、次のような問題が生じる。即ち、重ね抵
抗シーム溶接は、第４図に示すように、１対の回
転電極１，１′間に、重ね合わせた被溶接板２を
通過させ、１対の回転電極１，１′に溶接電源３
から溶接電流を通電して、重ね合わせた被溶接板
２を抵抗溶接するものであるが、遅延回路を設け
る必要があるので、溶接装置の構造が複雑にな
る。また、板厚計を回転電極１，１′と別の場所
に設ける必要があるので、被溶接板２の周囲に板
厚計の設置場所を確保する必要がある。さらに、
溶接開始時において、回転電極１，１′と板厚計
との間の被溶接板２の板厚変動に対して、溶接条
件を制御することができない。
The above-described seam welding device for electric resistance welded pipes can be applied to a lap resistance seam welding device for welding a plurality of stacked plates to be welded, but in this case, the following problem occurs. That is, in lap resistance seam welding, as shown in FIG. power supply 3
The welding current is passed through the welding device to resistance weld the overlapped plates 2 to be welded, but since a delay circuit needs to be provided, the structure of the welding device becomes complicated. Further, since it is necessary to provide the plate thickness gauge at a location different from the rotating electrodes 1 and 1', it is necessary to secure a place for installing the plate thickness gauge around the plate 2 to be welded. moreover,
At the start of welding, welding conditions cannot be controlled with respect to variations in the thickness of the plate 2 to be welded between the rotating electrodes 1, 1' and the plate thickness gauge.
従つて、この発明の目的は、遅延回路を設ける
必要がなく、しかも、溶接開始時における溶接条
件制御不能箇所を皆無にすることができる重ね抵
抗シーム溶接装置を提供することにある。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lap resistance seam welding apparatus that does not require a delay circuit and can eliminate any locations where welding conditions cannot be controlled at the start of welding.
本願発明者等は、上述した問題を解決するため
に鋭意研究を重ねた結果、回転電極と同一位置に
板厚測定手段を設ければ、上述した問題を全て解
決することができるといつた知見を得た。
As a result of intensive research to solve the above-mentioned problems, the inventors of the present application have found that all the above-mentioned problems can be solved by providing a plate thickness measuring means at the same position as the rotating electrode. I got it.
この発明は、上述した知見に基きなされたもの
であつて、重ね合わされた複数枚の被溶接板を挾
んでこれに溶接電流を通電するための１対の回転
電極と、前記１対の回転電極に溶接電流を供給す
るための溶接電源とを有する重ね抵抗シーム溶接
装置において、前記１対の回転電極に加圧バネを
介して取り付けられた荷重計と、前記荷重計から
の荷重信号に基いて、前記被溶接板の板厚を演算
するために板厚演算器と、前記板厚演算器からの
板厚信号に基いて、溶接条件を制御するための制
御器とからなることに特徴を有するものである。 The present invention has been made based on the above-mentioned knowledge, and includes a pair of rotating electrodes for sandwiching a plurality of stacked plates to be welded and applying a welding current to the plates; A lap resistance seam welding device having a welding power supply for supplying a welding current to a load cell, and a load cell attached to the pair of rotating electrodes via a pressure spring, and a load signal from the load cell. , characterized in that it comprises a plate thickness calculator for calculating the thickness of the plate to be welded, and a controller for controlling welding conditions based on a plate thickness signal from the plate thickness calculator. It is something.
次に、この発明の重ね抵抗シーム溶接装置の一
実施態様を図面を参照しながら説明する。 Next, one embodiment of the lap resistance seam welding apparatus of the present invention will be described with reference to the drawings.
第１図は、この発明の重ね抵抗シーム溶接装置
の一実施態様を示すブロツク図である。 FIG. 1 is a block diagram showing one embodiment of the lap resistance seam welding apparatus of the present invention.
第１図において、１対の回転電極１，１′は、
重ね合わされた複数枚（この例では２枚）の被溶
接板２を挾み込みながらモータ４によつて回転
し、そして、後述する溶接電源からの溶接電流を
被溶接板２に通電する。第２図に示すように、１
対の回転電極１，１′のうちの一方の固定回転電
極１は、枠体５に固定され、そして、他方の移動
回転電極１′は、加圧バネ６、調整ネジ７および
後述する荷重計を介して枠体５に、被溶接板２の
板厚方向に移動自在に取り付けられている。調整
ネジ７は、枠体５に螺合しており、移動回転電極
１′の被溶接板２への加圧力を調整する。調整ネ
ジ７の代りにシリンダ等を使用しても良い。 In FIG. 1, a pair of rotating electrodes 1, 1' are
It is rotated by a motor 4 while sandwiching a plurality of stacked plates 2 to be welded (in this example, two plates 2), and then a welding current from a welding power source, which will be described later, is applied to the plates 2 to be welded. As shown in Figure 2, 1
Of the pair of rotating electrodes 1 and 1', one fixed rotating electrode 1 is fixed to the frame 5, and the other movable rotating electrode 1' is connected to a pressure spring 6, an adjustment screw 7, and a load cell to be described later. It is attached to the frame 5 via the frame 5 so as to be movable in the thickness direction of the plate 2 to be welded. The adjustment screw 7 is screwed into the frame 5 and adjusts the pressure force applied by the movable rotating electrode 1' to the plate 2 to be welded. A cylinder or the like may be used instead of the adjustment screw 7.
荷重計８は、ロードセルからなり、加圧バネと
調整ネジ７との間に設けられており、移動回転電
極１′の被溶接板２への加圧力を検出する。 The load cell 8 consists of a load cell, is provided between the pressure spring and the adjustment screw 7, and detects the pressure force applied by the movable rotating electrode 1' to the plate 2 to be welded.
溶接電源９は、変圧器１０、変圧器１０の１次
側に接続された交流電源１１およびサイリスタ１
２、および、サイリスタ１２を制御するための
SCR点弧回路１３からなつており、溶接電源９
の２次側に１対の回転電極１，１′が接続されて
いる。 The welding power source 9 includes a transformer 10, an AC power source 11 connected to the primary side of the transformer 10, and a thyristor 1.
2, and for controlling the thyristor 12
It consists of an SCR ignition circuit 13 and a welding power source 9.
A pair of rotating electrodes 1 and 1' are connected to the secondary side of the electrode.
板厚演算器１４は、固定回転電極１と荷重計８
との間の距離が一定であり、且つ、移動回転電極
１′の被溶接板２への加圧力の変化は、被溶接板
２の板厚と１対１に対応することから、荷重計８
からの荷重信号に基いて、下式に従つて被溶接板
２の板厚（ｔ）を演算する。 The plate thickness calculator 14 includes a fixed rotating electrode 1 and a load meter 8.
The distance between the load cell 8 and
Based on the load signal from , the thickness (t) of the plate 2 to be welded is calculated according to the formula below.
ｔ＝Ｆ−F0／Ｋ …(1)
但し、F0：被溶接板２への板厚変動前の加圧
力、
Ｆ：被溶接板２への板厚変動後の加圧
力、
Ｋ：加圧バネ６のバネ定数。 t=F-F 0 /K...(1) However, F 0 : Pressure force on the plate to be welded 2 before the thickness change, F: Pressure force on the plate to be welded 2 after the plate thickness change, K: Pressure Spring constant of pressure spring 6.
制御器１５は、板厚演算器１４からの板厚信号
に基いて、モータ４およびSCR点弧回路１３を
制御する。即ち、制御器１５には、被溶接板２の
板厚（ｔ）と最適溶接条件との関係が予め記憶さ
せてあり、例えば、被溶接板２の板厚が初期値を
超えて厚くなつた場合には、SCR点弧回路１３
に溶接電流の増加指令を送り、それ以上に板厚が
厚くなつた場合には、さらに、モータ４に速度減
少指令を送る。 The controller 15 controls the motor 4 and the SCR ignition circuit 13 based on the plate thickness signal from the plate thickness calculator 14 . That is, the controller 15 stores in advance the relationship between the thickness (t) of the plate 2 to be welded and the optimum welding conditions, and for example, when the thickness of the plate 2 to be welded has increased beyond the initial value. In case, SCR ignition circuit 13
A welding current increase command is sent to the motor 4, and if the plate thickness becomes thicker than that, a speed reduction command is sent to the motor 4.
上述した、この発明の重ね抵抗シーム溶接装置
によれば、被溶接板２の板厚が変動しても、次の
ようにして常に適切な溶接条件に従つて被溶接板
２が溶接される。即ち、１対の回転電極１，１′
が被溶接板２面上を回転しながら溶接を行なつて
いる途中で、第３図に示すように、被溶接板２間
にもう１枚の被溶接板２′が挾み込まれて被溶接
板２の板厚が見掛け上厚くなると、移動回転電極
１′が加圧バネ６の力に抗して移動する。この結
果、被溶接板２への加圧力が増加し、このときの
加圧力は荷重計８によつて検出される。このよう
にして加圧力が検出されると、被溶接板２の板厚
（ｔ）が板厚演算器１４によつて前記(1)式に従つ
て演算される。板厚が演算されると、この結果に
基いて、制御器１５からSCR点弧回路１３に溶
接電流増加指令が送られる。被溶接板２の板厚が
さらに厚くなつた場合には、モータ４にも速度減
少指令が送られて溶接速度が低下する。これによ
つて、被溶接板２の板厚が変動しても常に適切な
溶接条件に従つて溶接が行なわれる。
According to the above-described lap resistance seam welding apparatus of the present invention, even if the thickness of the welded plate 2 changes, the welded plate 2 is always welded under appropriate welding conditions in the following manner. That is, a pair of rotating electrodes 1, 1'
While welding is being carried out while rotating over the two surfaces of the plates to be welded, another plate to be welded 2' is inserted between the two plates to be welded, as shown in Figure 3. When the welding plate 2 becomes thicker in appearance, the movable rotating electrode 1' moves against the force of the pressure spring 6. As a result, the pressurizing force on the plate 2 to be welded increases, and the pressurizing force at this time is detected by the load meter 8. When the pressurizing force is detected in this way, the plate thickness (t) of the plate 2 to be welded is calculated by the plate thickness calculator 14 according to the above equation (1). Once the plate thickness is calculated, a welding current increase command is sent from the controller 15 to the SCR ignition circuit 13 based on the result. When the thickness of the plate 2 to be welded becomes thicker, a speed reduction command is also sent to the motor 4 to reduce the welding speed. Thereby, even if the thickness of the plate 2 to be welded changes, welding is always performed under appropriate welding conditions.
以上説明したように、この発明によれば、従来
のように、回転電極と別の位置に板厚計が設けら
れておらず、回転電極と１体的に、即ち、回転電
極と同じ位置に板厚計が設けられているので、遅
延回路を設ける必要がない。従つて、溶接装置の
構造が簡素化され、しかも、板厚計の設置場所を
確保する必要がなく、さらに、溶接開始と同時に
被溶接板の板厚変動に応じた溶接条件の制御が行
なえる等、種々のきわめて有用な効果がもたらさ
れる。
As explained above, according to the present invention, the plate thickness gauge is not provided at a separate position from the rotating electrode as in the conventional case, but is installed integrally with the rotating electrode, that is, at the same position as the rotating electrode. Since a plate thickness gauge is provided, there is no need to provide a delay circuit. Therefore, the structure of the welding device is simplified, there is no need to secure a place to install a plate thickness gauge, and welding conditions can be controlled according to changes in the thickness of the plate to be welded at the same time as welding starts. etc., various extremely useful effects are brought about.
第１図は、この発明の重ね抵抗シーム溶接装置
の一実施態様を示すブロツク図、第２図は、同装
置における回転電極部分の正面図、第３図は、被
溶接板間に別の板が挾み込まれた状態を示す断面
図、第４図は、従来の重ね抵抗シーム溶接装置の
説明図である。図面において、
１，１′…回転電極、２，２′…被溶接板、３…
溶接電源、４…モータ、５…枠体、６…加圧バ
ネ、７…調整ネジ、８…荷重計、９…溶接電源、
１０…変圧器、１１…交流電源、１２…サイリス
タ、１３…SCR点弧回路、１４…板厚演算器、
１５…制御器。
Fig. 1 is a block diagram showing one embodiment of the lap resistance seam welding device of the present invention, Fig. 2 is a front view of the rotating electrode portion of the same device, and Fig. 3 is a diagram showing another plate between the plates to be welded. FIG. 4 is an explanatory diagram of a conventional lap resistance seam welding device. In the drawings, 1, 1'... rotating electrode, 2, 2'... plate to be welded, 3...
Welding power source, 4... Motor, 5... Frame, 6... Pressure spring, 7... Adjustment screw, 8... Load cell, 9... Welding power source,
10...Transformer, 11...AC power supply, 12...Thyristor, 13...SCR ignition circuit, 14...Plate thickness calculator,
15...Controller.
Claims (1)
れに溶接電流を通電するための１対の回転電極
と、前記１対の回転電極に溶接電流を供給するた
めの溶接電源とを有する重ね抵抗シーム溶接装置
において、 前記１対の回転電極に加圧バネを介して取り付
けられた荷重計と、前記荷重計からの荷重信号に
基いて、前記被溶接板の板厚を演算するための板
厚演算器と、前記板厚演算器からの板厚信号に基
いて、溶接条件を制御するための制御器とからな
ることを特徴とする、重ね抵抗シーム溶接装置。[Scope of Claims] 1. A pair of rotating electrodes for sandwiching a plurality of stacked plates to be welded and applying welding current thereto, and a welding device for supplying welding current to the pair of rotating electrodes. A lap resistance seam welding apparatus having a power source, a load meter attached to the pair of rotating electrodes via a pressure spring, and a load signal from the load meter to determine the thickness of the plate to be welded. A lap resistance seam welding device comprising: a plate thickness calculator for calculation; and a controller for controlling welding conditions based on a plate thickness signal from the plate thickness calculator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5678287A JPS63224882A (en) | 1987-03-13 | 1987-03-13 | Lap resistance seam welding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5678287A JPS63224882A (en) | 1987-03-13 | 1987-03-13 | Lap resistance seam welding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63224882A JPS63224882A (en) | 1988-09-19 |
| JPH0451268B2 true JPH0451268B2 (en) | 1992-08-18 |
Family
ID=13036996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5678287A Granted JPS63224882A (en) | 1987-03-13 | 1987-03-13 | Lap resistance seam welding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63224882A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH084942B2 (en) * | 1988-10-19 | 1996-01-24 | 日立精工株式会社 | Current control method and device in seam welding |
| JPH07115208B2 (en) * | 1989-05-15 | 1995-12-13 | 株式会社電元社製作所 | Method and apparatus for seam welding for strip connection |
| JPH05185240A (en) * | 1992-01-16 | 1993-07-27 | Mitsubishi Electric Corp | Seam welding equipment |
| JPH0593667U (en) * | 1992-05-27 | 1993-12-21 | 株式会社セイワ製作所 | Seam welding equipment |
-
1987
- 1987-03-13 JP JP5678287A patent/JPS63224882A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63224882A (en) | 1988-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3886603B2 (en) | Resistance welding system using cumulative heat generation per unit volume as an index | |
| US4442337A (en) | Method and system for dual control of resistance welding | |
| ES463399A1 (en) | Method and mechanism for controlling forces in a continuous-casting machine | |
| JPH0451268B2 (en) | ||
| JPS6096378A (en) | Flash butt welding method | |
| JP3534453B2 (en) | Resistance welding method and apparatus | |
| US3162069A (en) | Method and apparatus for metal rolling | |
| JPH07328769A (en) | Arc welding apparatus and arc welding method | |
| JP2907419B2 (en) | Method of controlling elongation of rolled sheet material in rolling equipment | |
| JPS5886985A (en) | Seam welding equipment | |
| JPS63260614A (en) | Device for controlling shape in cluster mill | |
| JPS6333111A (en) | Shape control method on rolling mill | |
| JPS60103575U (en) | Core wire straightening feeding device | |
| JPS6347368Y2 (en) | ||
| JPH0431771B2 (en) | ||
| JP2546079B2 (en) | Tension control device | |
| JPH0318064Y2 (en) | ||
| JPH0324283B2 (en) | ||
| JPH0644518Y2 (en) | Aluminum welding equipment | |
| JPH0225284A (en) | Spot welding method for laminated steel plate | |
| JPH0219710B2 (en) | ||
| JPH0626457B2 (en) | Control system of reactive power compensator | |
| JPH03161107A (en) | Method and device for temper rolling | |
| JPS63123504A (en) | Automatic control method for sheet thickness | |
| JPS61276777A (en) | Automatic weld line profiling method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |