JPH0687081A - Method and device for controlling seam welding quality - Google Patents
Method and device for controlling seam welding qualityInfo
- Publication number
- JPH0687081A JPH0687081A JP26673892A JP26673892A JPH0687081A JP H0687081 A JPH0687081 A JP H0687081A JP 26673892 A JP26673892 A JP 26673892A JP 26673892 A JP26673892 A JP 26673892A JP H0687081 A JPH0687081 A JP H0687081A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- seam welding
- welded
- ultrasonic
- butt
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000011324 bead Substances 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000003908 quality control method Methods 0.000 claims abstract description 9
- 238000007689 inspection Methods 0.000 abstract description 17
- 239000000523 sample Substances 0.000 abstract description 16
- 238000002310 reflectometry Methods 0.000 abstract 3
- 230000001066 destructive effect Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はシーム溶接動作と同時に
溶接部の良否判定を行うシーム溶接機の溶接品質管理方
法と装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding quality control method and apparatus for a seam welder, which determines the quality of a welded portion simultaneously with the seam welding operation.
【0002】[0002]
【従来の技術】従来シーム溶接の溶接部の良否判定は,
溶接片を定期的に抽出して破壊検査又は断面検査を行
い,その検査結果から溶接条件や制御および溶接物の状
態などが適切な範囲に保たれているかを判断することに
より行われていた。2. Description of the Related Art In the conventional seam welding, the quality of the welded portion is judged
It was performed by periodically extracting welded pieces and performing a destructive inspection or a cross-section inspection, and judging from the inspection results whether the welding conditions, control, and the condition of the welded object are kept within an appropriate range.
【0003】[0003]
【発明が解決しようとする課題】しかし,このような抜
き取り検査は,破壊検査は手間がかかり,かつワーク
を損壊させる。溶接部の全数検査を行うことができな
い。万一溶接不良が発見されたときは,前回最終の抜
き取り時点までの広い範囲の溶接物を疑わなくてはなら
ないなどの問題があった。However, in such a sampling inspection, destructive inspection is troublesome and the work is damaged. We cannot perform 100% inspection of welds. Should a welding defect be discovered, there was a problem in that it was necessary to doubt the wide range of welded materials up to the last extraction point.
【0004】[0004]
【課題を解決するための手段】本発明は前記の問題点を
解消するためになされたもので,2枚の金属板を所定量
だけ重ね合わせ,その重ね合わせて形成した突合わせ部
を一対のシーム溶接用電極輪で挟持し,かつこの電極輪
に溶接に要する加圧力と電流を与えてこれを回転駆動し
ながら突合わせ溶接するシーム溶接方法において,前記
電極輪の後方部位に超音波検知手段を設け,この検知手
段が先行する前記電極輪によって溶接された突合わせ部
を追尾しながらその溶接部の超音波反射率を時々刻々に
検出し,その検出した超音波反射率が予め設定した基準
値を越えたとき(又は越えなかったとき)に外部に出力
信号を発するようにした方法を主要な特徴とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and two metal plates are superposed by a predetermined amount, and a pair of abutting portions formed by superposing the metal plates are formed. In a seam welding method, which is sandwiched between electrode wheels for seam welding, and is butt-welded while applying a pressing force and a current required for welding to the electrode wheels while rotating the electrode wheels, ultrasonic detection means is provided at a rear portion of the electrode wheels. The ultrasonic wave reflectance of the welded portion is detected moment by moment while tracking the butt portion welded by the electrode wheel preceded by this detection means, and the detected ultrasonic wave reflectance is a preset reference value. The main feature is a method of outputting an output signal to the outside when the value exceeds (or does not exceed) the value.
【0005】また,本発明方法を実施するための装置と
して,次のような技術的手段を講じてある。すなわち,
突合せ状態で相対する2枚の金属板を所定量だけ重ね合
わせ,その重ね合わせた突合わせ部を一対のシーム溶接
用電極輪で加圧し,これを回転駆動し通電して溶接を行
うシーム溶接機において,一台の台車と,この台車に支
持された一対のシーム溶接用電極輪と,この電極輪の後
方部位に配置され,溶接された突合せ部の溶接ビード幅
方向に繰り返し動作し,先行するシーム溶接用電極輪に
よって溶接された突合わせ部の超音波反射率を検出し,
その検出した超音波反射率が予め設定した基準値を越え
たときに外部へ出力信号を発する超音波検知手段とを備
えたものである。Further, the following technical means are taken as an apparatus for carrying out the method of the present invention. That is,
A seam welding machine in which two metal plates facing each other in a butt state are overlapped by a predetermined amount, the overlapped butt portion is pressed by a pair of seam welding electrode wheels, and this is rotationally driven to energize for welding. In one, a trolley, a pair of seam welding electrode wheels supported by the trolley, and a rear portion of the electrode wheel, which are repeatedly operated in the welding bead width direction of the welded butt portion, Detects the ultrasonic reflectance of the butt welded by the seam welding electrode wheel,
And an ultrasonic wave detecting means for outputting an output signal to the outside when the detected ultrasonic wave reflectance exceeds a preset reference value.
【0006】[0006]
【作用】そこで,本発明の方式では,シーム溶接用電極
輪を保持する台車の電極後方部位に超音波検知手段を設
けたことにより,先行する電極輪が行った溶接部を前記
検知手段が一定の距離をおいて追跡探査するようにな
る。したがって,従来の抜き取り検査方式に比べ,溶接
中に溶接部の良否判定を自動的に実施することができ
る。全溶接線を溶接直後に全数検査することができ,ま
た溶接ビード幅方向にも探査できるから品質管理精度を
向上し,信頼性の高い品質管理システムを確立できる。
また,非破壊検査であるから,検査のための特別な検査
工程や駆動装置を要しない。よって,溶接品質管理装置
を構造簡単,安価に製作できる。Therefore, in the system of the present invention, the ultrasonic detecting means is provided at the rear portion of the electrode of the carriage for holding the seam welding electrode wheel, so that the detecting means can keep the welding portion made by the preceding electrode wheel constant. It will be tracked and explored at a distance of. Therefore, as compared with the conventional sampling inspection method, the quality of the welded portion can be automatically determined during welding. All weld lines can be inspected immediately after welding and can be searched in the weld bead width direction, improving quality control accuracy and establishing a highly reliable quality control system.
Further, since it is a non-destructive inspection, no special inspection process or drive device for inspection is required. Therefore, the welding quality control device can be manufactured with a simple structure and at a low cost.
【0007】[0007]
【実施例】以下,本発明方法を実施した場合のマッシュ
・シーム溶接機の実施例について図面を参照しながら説
明する。なお,図1は本発明装置全体の概略図である。
図2はシーム溶接用電極輪と超音波検知手段と溶接部と
の配置関係を示す説明図である。また図3は前記検知手
段オシレータの動作軌跡を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mash seam welding machine when the method of the present invention is carried out will be described below with reference to the drawings. Note that FIG. 1 is a schematic view of the entire apparatus of the present invention.
FIG. 2 is an explanatory view showing the positional relationship between the seam welding electrode wheel, the ultrasonic detecting means, and the welded portion. Further, FIG. 3 shows an operation locus of the detecting means oscillator.
【0007】1はCフレームの台車で,ローラ2がガイ
ド3に沿ってシリンダ4により駆動され金属板Sのライ
ン方向に対し直角に交わる方向から前進後退する。5は
上下一対のシーム溶接用電極輪で,加圧シリンダ6によ
り電極間の加圧/開放動作が行われる。7は溶接トラン
ス。8は各電極輪と溶接トランス7との通電経路を構成
する二次導体である。これらは従来のものと変わらない
構造部品である。Reference numeral 1 denotes a C-frame carriage, in which a roller 2 is driven by a cylinder 4 along a guide 3 and moves forward and backward from a direction intersecting at right angles with the line direction of the metal plate S. Reference numeral 5 denotes a pair of upper and lower seam welding electrode wheels, and a pressure cylinder 6 performs pressure / opening operation between the electrodes. 7 is a welding transformer. Reference numeral 8 is a secondary conductor that constitutes an energization path between each electrode wheel and the welding transformer 7. These are structural parts that are no different from conventional ones.
【0009】10は超音波検知手段として使用した超音
波探傷用探触子である。たとえば図のように二次導体8
に絶縁された状態で電極輪の後方部位に取付けられるも
のである。この場合の探触子は金属板に対しては非接触
で,上側又は下側に配置してもよい。また溶接部の表面
に直接接触させてもよい。また,超音波の伝達効率の向
上と,熱による探触子の損傷を避けるために噴流水を充
満させたパイプPで覆われている。この探触子10が検
出した探傷データは,探触子から金属板への距離やワー
ク板厚があらかじめ分かっているので,音速と反射波の
遅延時間により演算すれば、被溶接物の金属板表面およ
び底面からの反射波成分を判断し打ち消すことができ
る。超音波はブローホールなど,内部に空洞があるとほ
とんど全反射するため,ワーク表面と底面の中間の,溶
接部内部からの反射波の大きさが内部欠陥と密接な相関
関係にある。Reference numeral 10 is an ultrasonic flaw detection probe used as ultrasonic detection means. For example, as shown in the figure, the secondary conductor 8
It is attached to the rear part of the electrode wheel in an insulated state. In this case, the probe is not in contact with the metal plate and may be arranged on the upper side or the lower side. Alternatively, the surface of the weld may be directly contacted. Further, in order to improve the transmission efficiency of ultrasonic waves and to avoid damage to the probe due to heat, it is covered with a pipe P filled with jet water. In the flaw detection data detected by the probe 10, since the distance from the probe to the metal plate and the work plate thickness are known in advance, the metal plate of the work piece to be welded can be calculated by calculating the sound velocity and the delay time of the reflected wave. It is possible to judge and cancel reflected wave components from the front and bottom surfaces. Since ultrasonic waves are almost totally reflected when there is a hollow inside such as a blowhole, the magnitude of the reflected wave from the inside of the weld, which is between the work surface and the bottom surface, is closely correlated with internal defects.
【0010】そこで検出した探傷データと予め定められ
た合否判定すべき基準値(上限又は下限)とを比較し,
検出した値が基準値を越えたとき,または基準値に達し
なかったときに警報等の出力信号を外部に発するように
すれば,高信頼の溶接品質管理が可能となる。たとえ超
音波探傷の信頼性が高いものであっても,長大なすべて
の溶接線を溶接後に独立に超音波探傷するのは人手によ
るにせよ,スキャナ装置によるにせよ,工数的,時間的
にも問題があった。しかし本発明のように,溶接を行う
電極輪を搭載した台車に探触子を配置することにより、
これらの問題を一挙に解消することが可能となる。Then, the detected flaw detection data is compared with a predetermined reference value (upper limit or lower limit) to be judged as pass / fail,
If an output signal such as an alarm is output to the outside when the detected value exceeds the reference value or does not reach the reference value, highly reliable welding quality control becomes possible. Even if ultrasonic flaw detection is highly reliable, it is not necessary to independently perform ultrasonic flaw detection on all long welding lines after welding, either manually or with a scanner device, in terms of man-hours and time. There was a problem. However, as in the present invention, by arranging the probe on the carriage equipped with the electrode wheel for welding,
It becomes possible to solve these problems all at once.
【0011】次に,前述した方法の実施例では探触子1
0の走査方向は一次元であり,いわば溶接線の中心部を
縦割にした一断面のみが検査の対象であった。現実的に
はほゞこれで溶接部の品質を代表しているといってさし
つかえない。しかしながら,より厳密には,通常のマッ
シュシーム溶接のビード幅は4〜8mm程度あるので,
ビード幅方向も含め,全体の溶接品質を三次元的に検査
することが必要である。そこで台車に搭載した探触子を
溶接線と直角方向に溶接ビード幅だけ一定速にて繰り返
し運動させて,板厚方向に加え,溶接ビード幅方向にも
探査を行うことにより,全溶接部の品質を確実に検査す
ることができる。Next, in the embodiment of the method described above, the probe 1
The scanning direction of 0 was one-dimensional, and so to speak, only one cross section in which the central portion of the welding line was divided vertically was the object of inspection. In reality, it can be said that this almost represents the quality of the weld. However, to be more precise, since the bead width of normal mash seam welding is about 4 to 8 mm,
It is necessary to inspect the overall welding quality three-dimensionally, including in the bead width direction. Therefore, the probe mounted on the carriage is repeatedly moved at a constant speed in the direction perpendicular to the welding line by the width of the welding bead, and in addition to the plate thickness direction, the welding bead width direction is also searched to detect all welds. The quality can be surely inspected.
【0012】[0012]
【発明の効果】以上で説明したように本発明方法によれ
ば,シーム溶接用電極輪を保持する台車の電極後方部位
に超音波探傷用探触子などの超音波検知手段を設けたこ
とにより,先行する電極輪が行った溶接部を前記探触子
が一定の距離をおいて追跡探査するようになる。したが
って,従来の抜き取り検査方法に比べ,全溶接線を自動
的に全数検査することができ,溶接直後に良否判定を行
うことができる。これによりシーム溶接部の品質検査の
効率及び信頼性を著しく高めることができる。As described above, according to the method of the present invention, the ultrasonic detection means such as the ultrasonic flaw detection probe is provided at the rear portion of the electrode of the carriage for holding the seam welding electrode wheel. The probe will trace and search the welded portion performed by the preceding electrode wheel at a constant distance. Therefore, compared to the conventional sampling inspection method, all the weld lines can be automatically inspected and the quality can be determined immediately after welding. This can significantly increase the efficiency and reliability of seam weld quality inspection.
【0013】また,本発明装置は,探触子を溶接線と直
角方向に溶接ビード幅だけ一定速にて繰り返し運動させ
て溶接部全範囲の探査を行うことにより,溶接ビード幅
を含む溶接部全体の溶接品質管理精度を向上する。ま
た,非破壊検査であるから,検査のための特別な工程、
駆動装置を要しない。既存のシーム溶接機にも簡単に探
触子を付加することができるなど,構造簡単で安価に製
作できる。Further, the apparatus of the present invention repeats the movement of the probe in the direction perpendicular to the welding line by the width of the welding bead at a constant speed to search the entire range of the welding portion, and thus the welding portion including the welding bead width. Improves overall welding quality control accuracy. Also, because it is a non-destructive inspection, a special process for inspection,
No drive unit required. The probe can be easily added to the existing seam welder, and the structure is simple and the manufacturing cost is low.
【図1】本発明方法を実施するための装置の一実施例を
示す概略図である。FIG. 1 is a schematic view showing an embodiment of an apparatus for carrying out the method of the present invention.
【図2】シーム溶接用電極輪と超音波検知手段と溶接部
との配置関係を示す説明図である。FIG. 2 is an explanatory diagram showing a positional relationship between a seam welding electrode wheel, ultrasonic detecting means, and a welded portion.
【図3】前記探触子オシレータの動作と軌跡を示す図で
ある。FIG. 3 is a diagram showing an operation and a locus of the probe oscillator.
1 台車 5 シーム溶接用電極 10 超音波検知手段(超音波探傷用探触子) S 金属板 1 trolley 5 Seam welding electrode 10 Ultrasonic detection means (ultrasonic flaw detection probe) S Metal plate
Claims (2)
その重ね合わせて形成した突合わせ部を一対のシーム溶
接用電極輪で挟持し,かつこの電極輪に溶接に要する加
圧力と電流を与えてこれを回転駆動しながら突合わせ溶
接するシーム溶接方法において,前記電極輪の後方部位
に超音波検知手段を設け,この検知手段が先行する前記
電極輪によって溶接された突合わせ部を追尾しながらそ
の溶接部の超音波反射率を時々刻々に検出し,その検出
した超音波反射率が予め設定した基準値を越えたとき
(又は越えなかったとき)に外部に出力信号を発するよ
うにしたことを特徴とするシーム溶接品質管理方法。1. Stacking two metal plates by a predetermined amount,
In the seam welding method, the butt portion formed by superposition is sandwiched by a pair of seam welding electrode wheels, and the electrode wheels are subjected to butt welding while being rotationally driven by applying the pressure and current required for welding. , Ultrasonic detection means is provided at the rear portion of the electrode wheel, and the ultrasonic reflectance of the welded portion is detected moment by moment while the detection means follows the butted portion welded by the preceding electrode wheel, A seam welding quality control method characterized in that an output signal is output to the outside when the detected ultrasonic reflectance exceeds (or does not exceed) a preset reference value.
定量だけ重ね合わせ,その重ね合わせた突合わせ部を一
対のシーム溶接用電極輪で加圧し,これを回転駆動し通
電して溶接を行うシーム溶接機において,一台の台車
と,この台車に支持された一対のシーム溶接用電極輪
と,この電極輪の後方部位に配置され,溶接された突合
せ部の溶接ビード幅方向に繰り返し動作し,先行するシ
ーム溶接用電極輪によって溶接された突合わせ部の超音
波反射率を検出し,その検出した超音波反射率が予め設
定した基準値を越えたときに外部へ出力信号を発する超
音波検知手段とを備えたシーム溶接品質管理装置。2. A pair of two metal plates facing each other in a butt state are superposed by a predetermined amount, and the superposed butt portions are pressed by a pair of seam welding electrode wheels, which are rotatively driven and energized for welding. In a seam welding machine for carrying out the above, one dolly, a pair of seam welding electrode wheels supported by the dolly, and a butt portion welded at the rear portion of the electrode wheels are repeatedly welded in the width direction of the weld bead. It operates and detects the ultrasonic reflectance of the butt welded by the preceding seam welding electrode wheel, and outputs an output signal to the outside when the detected ultrasonic reflectance exceeds a preset reference value. Seam welding quality control device with ultrasonic detection means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26673892A JPH0687081A (en) | 1992-09-09 | 1992-09-09 | Method and device for controlling seam welding quality |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26673892A JPH0687081A (en) | 1992-09-09 | 1992-09-09 | Method and device for controlling seam welding quality |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0687081A true JPH0687081A (en) | 1994-03-29 |
Family
ID=17435017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26673892A Pending JPH0687081A (en) | 1992-09-09 | 1992-09-09 | Method and device for controlling seam welding quality |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0687081A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002189021A (en) * | 2000-12-22 | 2002-07-05 | Nihon Tetra Pak Kk | Quality inspection apparatus |
JP2010008257A (en) * | 2008-06-27 | 2010-01-14 | Hino Motors Ltd | Seam welding inspection method and seam welding inspection device |
EP3556506A3 (en) * | 2018-04-18 | 2019-11-06 | Rolls-Royce plc | A welding process and welding apparatus using a probe |
-
1992
- 1992-09-09 JP JP26673892A patent/JPH0687081A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002189021A (en) * | 2000-12-22 | 2002-07-05 | Nihon Tetra Pak Kk | Quality inspection apparatus |
JP2010008257A (en) * | 2008-06-27 | 2010-01-14 | Hino Motors Ltd | Seam welding inspection method and seam welding inspection device |
EP3556506A3 (en) * | 2018-04-18 | 2019-11-06 | Rolls-Royce plc | A welding process and welding apparatus using a probe |
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