JP2501909Y2 - Spot welding quality measuring device - Google Patents
Spot welding quality measuring deviceInfo
- Publication number
- JP2501909Y2 JP2501909Y2 JP9503690U JP9503690U JP2501909Y2 JP 2501909 Y2 JP2501909 Y2 JP 2501909Y2 JP 9503690 U JP9503690 U JP 9503690U JP 9503690 U JP9503690 U JP 9503690U JP 2501909 Y2 JP2501909 Y2 JP 2501909Y2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- spot welding
- electrode
- spot
- measuring device
- 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
- Resistance Welding (AREA)
Description
【考案の詳細な説明】 ［考案の目的］ （産業上の利用分野） この考案は、スポット溶接作業中に溶接品質測定を行
うスポット溶接の品質測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a spot welding quality measuring device for measuring welding quality during spot welding work.
（従来の技術） 銅または銅合金の電極間に被溶接物を挟んで加圧しな
がら短時間大電流を流して接触面にナゲットを形成して
溶接するスポット溶接は、自動車ボディーの組立てライ
ンにおいては欠くことができない。スポット溶接は、電
流値、圧力および通電時間を制御装置によって制御し、
同一の被溶接物に多数点のナゲットを形成して溶接する
場合には同一条件で溶接する必要がある。(Prior Art) Spot welding, in which an object to be welded is sandwiched between copper or copper alloy electrodes and a large current is passed for a short time while applying pressure to form a nugget on the contact surface for welding, is used in the assembly line of automobile bodies. I can't miss it. In spot welding, the current value, pressure and energization time are controlled by the controller,
When forming a large number of nuggets on the same object to be welded, it is necessary to weld under the same conditions.
ところが、スポット溶接の溶接ガンを形成する電極は
磨耗し易く、磨耗によって電極先端の形状が変化する。
したがって、電流値、圧力および通電時間を制御装置に
よって制御して一定に保っても溶接状態にバラツキがで
き、スポット溶接の品質低下の原因となる。However, the electrode forming the welding gun of spot welding is easily worn, and the shape of the electrode tip changes due to the wear.
Therefore, even if the current value, the pressure, and the energization time are controlled by the control device and kept constant, the welding state can be varied, which causes deterioration of spot welding quality.
そこで、従来から溶接ガンの電極間に電極間電圧モニ
ター等の溶接品質測定装置を設け、溶接品質の管理を行
っているが、これは被溶接物が鉄板の場合に有効であ
り、最近、自動車ボディーに多用されている防錆鋼板に
おいては鋼板に化学的な表面処理が行われているため、
正確な品質測定ができない。Therefore, conventionally, a welding quality measuring device such as an inter-electrode voltage monitor is installed between the electrodes of the welding gun to control the welding quality. This is effective when the work is an iron plate, and recently In the rustproof steel plate that is often used in the body, the steel plate is chemically surface-treated,
Accurate quality measurement is not possible.
したがって、防錆鋼板のスポット溶接作業において
は、一定の溶接点数に達したとき、電極を電極研磨工程
に移し、電極研磨を行った後、再び生産ラインにおいて
スポット溶接を行っている。Therefore, in the spot welding operation of a rustproof steel plate, when a certain number of welding points are reached, the electrode is moved to an electrode polishing step, and after electrode polishing, spot welding is performed again in the production line.
（考案が解決しようとする課題） しかしながら、前述のように、防錆鋼板のスポット溶
接作業において一定の溶接点数に達したとき、電極を電
極研磨工程に移して電極研磨を行うことは、電極の磨耗
状態を経験的に定めていることであり、磨耗が進んでい
ないにも拘らず研磨したり、磨耗が一定以上進んでいて
も一定の溶接点数に達しないでスポット溶接を継続する
ことがあり、スポット溶接の信頼生に欠けるという問題
がある。(Problems to be solved by the invention) However, as described above, when a certain number of welding points is reached in spot welding work of an anticorrosive steel plate, it is necessary to transfer the electrode to an electrode polishing step and perform electrode polishing. The wear state is empirically determined.Therefore, polishing may be performed even if the wear is not progressing, or spot welding may be continued without reaching a certain number of welding points even if the wear is progressing above a certain level. However, there is a problem that the spot welding lacks reliability.
この考案は前記事情に着目してなされたもので、その
目的とするところは、スポット溶接の作業中に電極の磨
耗状態を試しスポット溶接によって溶接品質の測定を行
い、品質測定を正確に行うことができるスポット溶接の
品質測定装置を提供することにある。This invention was made in view of the above circumstances, and the purpose thereof is to test the wear state of the electrode during the work of spot welding, measure the welding quality by spot welding, and perform the quality measurement accurately. It is to provide a spot welding quality measuring device capable of performing the above.
［考案の構成］ （課題を解決するための手段および作用） この考案は、前記目的を達成するために、溶接ロボッ
トによる溶接ガンの移動範囲内に溶接品質測定用試験片
および電極研磨部を設置する。そして、生産ラインにお
いて被溶接物を所定回数スポット溶接した後、その溶接
ガンによって前記溶接品質測定用試験片を試しスポット
溶接し、この試しスポット溶接時に溶接ガンの電極を溶
接品質測定装置によって測定する。この溶接品質測定装
置による測定結果に基づいて溶接ガンを生産ラインに戻
して被溶接物のスポット溶接を継続するか、溶接ガンを
前記電極研磨部に移動して電極研磨し、研磨が終了した
溶接ガンを再び生産ラインに戻して被溶接物のスポット
溶接を行う。[Structure of Device] (Means and Actions for Solving the Problem) In order to achieve the above-mentioned object, the present invention installs a welding quality measuring test piece and an electrode polishing part within a moving range of a welding gun by a welding robot. To do. Then, after the object to be welded is spot welded a predetermined number of times in the production line, the welding quality measuring test piece is test spot welded by the welding gun, and the electrode of the welding gun is measured by the welding quality measuring device during the trial spot welding. . Based on the measurement result by this welding quality measuring device, the welding gun is returned to the production line to continue spot welding of the workpiece, or the welding gun is moved to the electrode polishing section to polish the electrode and the welding is completed. The gun is returned to the production line to perform spot welding of the workpiece.
（実施例） 以下、この考案の一実施例を図面に基づいて説明す
る。(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.
第１図はスポット溶接の品質測定システムを示すもの
で、１は溶接ロボットである。溶接ロボット１は、ロボ
ット本体２に対して旋回および回動自在な可動アーム３
が設けられ、この可動アーム３にはスポット溶接の溶接
ガン４が設けられている。溶接ガン４には互いに対向す
る一対の電極5,5が設けられ、生産ライン６に設置され
た被溶接物７の溶接部を挟み、加圧しながら大電流を短
時間流してスポット溶接する。この被溶接物７は、例え
ば自動車ボディー部品であり、防錆鋼板によって形成さ
れている。前記溶接ロボット１はロボット制御装置８に
よって制御され、このロボット制御装置８には公知の溶
接品質測定装置９、電極先端径測定装置10および電極研
磨機11からの信号が工程制御装置12を介して入力され
る。FIG. 1 shows a quality measuring system for spot welding, and 1 is a welding robot. The welding robot 1 includes a movable arm 3 that is rotatable and rotatable with respect to the robot body 2.
The movable arm 3 is provided with a welding gun 4 for spot welding. The welding gun 4 is provided with a pair of electrodes 5, 5 facing each other, and sandwiches the welded portion of the workpiece 7 installed on the production line 6 and applies a large current for a short time while applying pressure to perform spot welding. The object to be welded 7 is, for example, an automobile body part, and is formed of a rustproof steel plate. The welding robot 1 is controlled by a robot controller 8, and signals from the well-known welding quality measuring device 9, electrode tip diameter measuring device 10 and electrode polishing machine 11 are transmitted to the robot controller 8 via a process controller 12. Is entered.
また、前記溶接ガン４の移動範囲内で、前記生産ライ
ン６から離れた位置には鉄板からなる溶接品質測定用試
験片13が設置されている。この試験片13は、溶接ロボッ
ト１によって溶接ガン４が旋回して生産ライン６と反対
側に位置したときに溶接ガン４と対向し、この試験片13
に対して溶接ガン４によって試しスポット溶接を行う際
には、溶接ガン４に前記溶接品質測定装置９が接続され
る。さらに、前記溶接ガン４の移動範囲内で、前記生産
ライン６から離れた位置には電極先端径測定装置10およ
び電極研磨部としての前記電極研磨機11が設置されてい
る。この電極研磨機11は溶接ガン４の電極5,5を研磨し
て再使用できる状態にドレッシングするものであり、電
極先端径測定装置10は研磨工程の終了した電極5,5の先
端径を測定するものである。Further, a welding quality measuring test piece 13 made of an iron plate is installed at a position apart from the production line 6 within the movement range of the welding gun 4. This test piece 13 faces the welding gun 4 when the welding gun 4 is swung by the welding robot 1 and positioned on the opposite side of the production line 6, and the test piece 13
On the other hand, when performing trial spot welding with the welding gun 4, the welding quality measuring device 9 is connected to the welding gun 4. Further, within the moving range of the welding gun 4, an electrode tip diameter measuring device 10 and the electrode polishing machine 11 as an electrode polishing unit are installed at positions apart from the production line 6. The electrode polishing machine 11 is for polishing the electrodes 5, 5 of the welding gun 4 and dressing them in a reusable state. The electrode tip diameter measuring device 10 measures the tip diameter of the electrodes 5, 5 after the polishing process. To do.
前述のように構成されたスポット溶接の品質測定シス
テムの作用について第１図および第２図に基づいて説明
する。The operation of the spot welding quality measuring system configured as described above will be described with reference to FIGS. 1 and 2.
ロボット制御装置８によって溶接ロボット１が制御さ
れ、溶接ガン４によって生産ライン６における被溶接物
７のスポット溶接を行う。スポット溶接がスタートし、
スポット溶接が一定回数に達すると、ロボット制御装置
８の指令によってスポット溶接をいったん停止する。そ
して、可動アーム３が旋回して溶接ガン４が試験片13に
対向したところで、ステップ100に示す、試験片13に試
しスポット溶接を行う。試しスポット溶接をする際、溶
接品質測定装置９によって品質測定を行い、ステップ10
1に示す、測定結果が合格か否かを判定し、YESの時には
可動アーム３によって溶接ガン４を生産ライン６に戻し
て被溶接物６の溶接作業を継続する。NOの時には前記可
動アーム３が旋回して電極研磨機11に溶接ガン４を移動
し、ステップ102に示す、電極研磨を行う。電極研磨が
完了した電極5,5は電極先端径測定装置10によって電極
先端径を測定し、ステップ103に示す、電極先端径が合
格か否かを判定する。ステップ103においてYESの時には
可動アーム３によって溶接ガン４を生産ライン６に戻し
て被溶接物６の溶接作業を継続する。NOの時には前記可
動アーム３が旋回して電極研磨機11によって再び電極5,
5の研磨を行い、このルーチンを繰り返すことにより、
常に一定の品質のスポット溶接作業を行うことができ
る。The welding robot 1 is controlled by the robot control device 8, and the welding gun 4 spot-welds the workpiece 7 on the production line 6. Spot welding started,
When the spot welding reaches a certain number of times, the spot welding is temporarily stopped by a command from the robot controller 8. Then, when the movable arm 3 turns and the welding gun 4 faces the test piece 13, trial spot welding is performed on the test piece 13 as shown in step 100. When performing trial spot welding, the quality is measured by the welding quality measuring device 9, and step 10
It is determined whether or not the measurement result shown in 1 is acceptable, and if YES, the welding gun 4 is returned to the production line 6 by the movable arm 3 and the welding work of the workpiece 6 is continued. When the result is NO, the movable arm 3 turns to move the welding gun 4 to the electrode polishing machine 11, and the electrode polishing shown in step 102 is performed. The electrode tip diameter is measured by the electrode tip diameter measuring device 10 for the electrodes 5 and 5 that have been polished, and it is determined in step 103 whether or not the electrode tip diameter is acceptable. If YES in step 103, the welding gun 4 is returned to the production line 6 by the movable arm 3 and the welding work of the workpiece 6 is continued. When NO, the movable arm 3 is rotated and the electrode polishing machine 11 again causes the electrodes 5,
By polishing 5 and repeating this routine,
It is possible to always carry out spot welding work of constant quality.
なお、前記一実施例においては、溶接ガン４の電極5,
5を電極研磨機11によって自動的にドレッシングするよ
うにしたが、手作業によって研磨してもよく、また電極
先端径測定は必ずしも設ける必要がなく、溶接品質測定
装置９のみに頼ってもよい。In the embodiment described above, the electrodes 5 of the welding gun 4,
Although the electrode 5 is automatically dressed by the electrode polishing machine 11, it may be manually dressed, and the electrode tip diameter measurement does not necessarily have to be provided, and only the welding quality measuring device 9 may be used.
［考案の効果］ 以上説明したように、この考案によれば、生産ライン
において被溶接物を所定回数スポット溶接した後、その
溶接ガンによって試験片を試しスポット溶接し、この試
しスポット溶接時に溶接ガンの電極を溶接品質測定装置
によって測定し、この測定結果に基づいて溶接ガンを生
産ラインに戻して被溶接物のスポット溶接を継続する
か、溶接ガンを電極研磨部に移動して電極研磨すること
により、スポット溶接の品質測定が能率的にしかも正確
に行うことができ、信頼性の高いスポット溶接ができる
という効果がある。[Effect of the Invention] As described above, according to the present invention, after the object to be welded is spot-welded a predetermined number of times in the production line, the test piece is test-spot-welded by the welding gun, and the welding gun is used during the test-spot welding. Of the electrode is measured with a welding quality measuring device, and the welding gun is returned to the production line based on the measurement result to continue spot welding of the workpiece, or the welding gun is moved to the electrode polishing section to polish the electrode. As a result, the quality of spot welding can be measured efficiently and accurately, and there is an effect that highly reliable spot welding can be performed.
図面はこの考案の一実施例を示すもので、第１図はスポ
ット溶接の品質測定システムの構成図、第２図はフロー
チャートである。 １……溶接ロボット４……溶接ガン、５……電極、６…
…生産ライン、７……被溶接物、８……ロボット制御装
置、９……溶接品質測定装置、11……電極研磨部、13…
…試験片。FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram of a quality measuring system for spot welding, and FIG. 2 is a flow chart. 1 ... Welding robot 4 ... Welding gun, 5 ... Electrode, 6 ...
... Production line, 7 ... Workpiece, 8 ... Robot control device, 9 ... Welding quality measuring device, 11 ... Electrode polishing part, 13 ...
…Test pieces.
Claims (1)
接ロボットを制御する制御装置とからなり、生産ライン
において被溶接物を前記溶接ガンによってスポット溶接
する作業中にスポット溶接の品質を測定する品質測定装
置において、前記溶接ロボットによる溶接ガンの移動範
囲内に溶接品質測定用試験片および電極研磨部を設置
し、生産ラインにおいて被溶接物を所定回数スポット溶
接した後、その溶接ガンによって前記溶接品質測定用試
験片を試しスポット溶接し、この試しスポット溶接時に
溶接ガンの電極を溶接品質測定装置によって測定し、こ
の測定結果に基づいて溶接ガンを生産ラインに戻して被
溶接物のスポット溶接を継続するか、溶接ガンを前記電
極研磨部に移動して電極研磨することを特徴とするスポ
ット溶接の品質測定装置。1. A welding robot equipped with a welding gun and a control device for controlling the welding robot. The quality of spot welding is measured during spot welding of an object to be welded by the welding gun in a production line. In a quality measuring device, a welding quality measuring test piece and an electrode polishing part are installed within the range of movement of the welding gun by the welding robot, spot welding is performed on a workpiece for a predetermined number of times in the production line, and then the welding gun is used to perform the welding. A test piece for quality measurement is subjected to trial spot welding, the electrode of the welding gun is measured with a welding quality measuring device during this trial spot welding, and the welding gun is returned to the production line based on this measurement result to perform spot welding of the workpiece. Spot welding quality measurement, characterized by continuing or moving the welding gun to the electrode polishing section and polishing the electrode. Location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9503690U JP2501909Y2 (en) | 1990-09-12 | 1990-09-12 | Spot welding quality measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9503690U JP2501909Y2 (en) | 1990-09-12 | 1990-09-12 | Spot welding quality measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0454577U JPH0454577U (en) | 1992-05-11 |
| JP2501909Y2 true JP2501909Y2 (en) | 1996-06-19 |
Family
ID=31833436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9503690U Expired - Lifetime JP2501909Y2 (en) | 1990-09-12 | 1990-09-12 | Spot welding quality measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2501909Y2 (en) |
-
1990
- 1990-09-12 JP JP9503690U patent/JP2501909Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0454577U (en) | 1992-05-11 |
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