JPH0328994B2 - - Google Patents
Info
- Publication number
- JPH0328994B2 JPH0328994B2 JP61105671A JP10567186A JPH0328994B2 JP H0328994 B2 JPH0328994 B2 JP H0328994B2 JP 61105671 A JP61105671 A JP 61105671A JP 10567186 A JP10567186 A JP 10567186A JP H0328994 B2 JPH0328994 B2 JP H0328994B2
- Authority
- JP
- Japan
- Prior art keywords
- cleaning
- pipe
- pressure
- weld
- tube
- 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
- 238000004140 cleaning Methods 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 27
- 230000002950 deficient Effects 0.000 claims description 9
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 8
- 230000007547 defect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 description 14
- 239000013307 optical fiber Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は金属管の溶接欠陥部の洗浄方法に関す
るものであり、その溶接欠陥部を修理する際の前
工程として利用できるものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for cleaning a weld defect in a metal pipe, and can be used as a preliminary step in repairing the weld defect.
光フアイバー、通信・電力ケーブル等はAl、
Cu、ステンレス管等の中に挿入して敷設されて
いるがこれらの保護管は偏肉がない長尺管を要求
されるため、条材を曲げ成形して管状にし、突き
合せ部をTIG溶接、ガス溶接等により溶接する方
法が一般に行われている。
Optical fibers, communication/power cables, etc. are made of Al,
These protective tubes are installed by being inserted into Cu, stainless steel tubes, etc., but since these protective tubes require long tubes with no uneven thickness, the strips are bent and formed into a tube shape, and the butt parts are TIG welded. , gas welding, etc. are commonly used.
例えばOPGW（電力光複合ケーブル）として用
いられている架空地線用の光フアイバー入り金属
管ユニツトは第３図に示す様に外径４〜６mm、肉
厚0.5〜0.6mmのAl管２ａ内に光フアイバー芯線１
０を収納した構造であつて、連続して１〜３Km製
造した後外周に他のAl線を撚合わせて最終製品
としている。 For example, a metal tube unit containing optical fiber for an overhead ground wire used as an OPGW (power optical composite cable) is installed in an Al pipe 2a with an outer diameter of 4 to 6 mm and a wall thickness of 0.5 to 0.6 mm, as shown in Figure 3. Optical fiber core wire 1
0 is housed in the structure, and after continuous production for 1 to 3 km, other Al wires are twisted around the outer periphery to make the final product.
光フアイバー入り金属管ユニツトは第４図の如
く金属テープを成形し、成形中に光フアイバーを
逐次金属管内に収納し、さらに突き合わせ部を溶
接した後に縮径して金属管の強度を上げた後に巻
取る工程によって製造するものである。この工程
で縮径している時に、Al管とロールもしくはダ
イス等との間に働く摩擦力を低減するために、一
般に潤滑油を用いている。 The optical fiber-containing metal tube unit is made by forming a metal tape as shown in Fig. 4, storing the optical fibers in the metal tube one after another during the forming process, and after welding the butt portions, reducing the diameter to increase the strength of the metal tube. It is manufactured by a winding process. During diameter reduction in this process, lubricating oil is generally used to reduce the frictional force that acts between the Al pipe and rolls or dies.
上記金属管の製造に際して、電極からのアーク
が不安定になり、第３図に示す様に溶接部１１に
ピンホール３等の溶接欠陥を生じる場合がある
が、最終の縮径工程で使用した潤滑油が欠陥内部
に侵入しており、この油は単に管２ａの表面を洗
浄しただけでは除去できないため、この部分を
TIG溶接、レーザー溶接等により修理しようとし
ても潤滑油が溶接時に蒸発し、健全な溶接部を得
ることが困難であった。
When manufacturing the metal tube mentioned above, the arc from the electrode becomes unstable and welding defects such as pinholes 3 may occur in the welded part 11 as shown in Figure 3. Lubricating oil has entered the defect, and this oil cannot be removed simply by cleaning the surface of the pipe 2a, so this area is
Even if attempts were made to repair using TIG welding, laser welding, etc., the lubricating oil would evaporate during welding, making it difficult to obtain a sound weld.
本発明はこの様な問題点を解決するため鋭意研
究の結果得られたものであり、金属管の溶接欠陥
部を超音波洗浄槽の中に浸漬し該金属管の外側か
ら金属管に圧力をかけるか、または金属管内を減
圧するかして該溶接欠陥部を超音波で洗浄するこ
とを特徴とする金属管の溶接欠陥部の洗浄方法で
ある。
The present invention was obtained as a result of intensive research to solve these problems, and involves immersing the welded defective part of the metal tube in an ultrasonic cleaning tank and applying pressure to the metal tube from the outside. This is a method for cleaning a weld defective portion of a metal tube, which comprises cleaning the weld defective portion with ultrasonic waves by applying pressure or reducing the pressure inside the metal tube.
〔作用〕
本発明では金属管の溶接欠陥部を超音波洗浄槽
の中に浸漬し金属管の外側から金属管に圧力をか
けるか、または金属管内を減圧するかして、溶接
欠陥部を超音波で洗浄することにより、ピンホー
ル等の内部にしみこんだ潤滑油を完全に除去する
ことが出来、再溶接により健全な溶接部を得るこ
とが出来る。[Function] In the present invention, the weld defective part of the metal pipe is immersed in an ultrasonic cleaning tank and pressure is applied to the metal pipe from the outside of the metal pipe, or the pressure inside the metal pipe is reduced, so that the weld defective part can be overcome. By cleaning with sonic waves, lubricating oil that has seeped into pinholes etc. can be completely removed, and a sound welded part can be obtained by rewelding.
超音波発振機は出力600W、周波数10〜20KHz
程度のものがよく、振動子としては第１図に示し
た様に接着型振動子を用いる場合と第２図に示し
た様に投込型振動子を用いる場合とがある。いず
れの場合にも管の外側から加圧するか又は管の内
側を減圧することが必要である。即ち溶接部に生
じるピンホールは一般に細い曲りくねった形状を
していて、例えば前述のAl管溶接部においては
通常直径10μｍ、長さ２〜３mm程度で、ほぼ管の
内厚に相当する深さのピンホールが生じており、
加圧又は減圧することによつてピンホール内に侵
入した油等の不純物を効果的に完全かつ確実に除
去することが出来る。換言すれば管の外側から加
圧するか又は管内を減圧することによつて洗浄液
が溶接部を通して金属管内に侵入し、これによつ
てピンホール内の油が洗浄される。加圧力は１〜
３Kg／cm2（ゲージ圧）、減圧の場合は10mmHg（絶
対圧）程度で良く、洗浄時間は数で充分である。
洗浄液としては一般にトリクレン等が用いられて
いるが、前述の光フアイバー入りAl管において
は、光フアイバーのプラスチツク被覆層を溶かさ
ないフロンを用いることが望ましい。 Ultrasonic oscillator output 600W, frequency 10~20KHz
As shown in FIG. 1, a bonded type vibrator is used as the vibrator, and an immersion type vibrator is used as shown in FIG. 2. In either case it is necessary to pressurize the tube from the outside or to reduce the pressure inside the tube. In other words, pinholes that occur in welds generally have a narrow, curved shape; for example, in the Al pipe weld mentioned above, they are usually about 10 μm in diameter, 2 to 3 mm in length, and have a depth that corresponds to the inner thickness of the pipe. There are pinholes,
By pressurizing or reducing the pressure, impurities such as oil that have entered the pinhole can be effectively, completely and reliably removed. In other words, by applying pressure from the outside of the tube or reducing the pressure inside the tube, the cleaning liquid enters the metal tube through the weld, thereby cleaning the oil in the pinhole. Pressure force is 1~
3Kg/cm 2 (gauge pressure), about 10mmHg (absolute pressure) in the case of reduced pressure is sufficient, and the number of cleaning times is sufficient.
Although trichlene or the like is generally used as a cleaning liquid, in the case of the above-mentioned Al tube containing optical fibers, it is desirable to use Freon, which does not dissolve the plastic coating layer of the optical fibers.
次に本発明の実施例を図面により詳細に説明す
ると、第１図に示す様に、洗浄槽１ａとカバー５
ａとの間にシール部４を介して溶接欠陥例えばピ
ンホール３を有するAl管２ａをはさんだ後、洗
浄液用配管７から洗浄槽１ａ内に洗浄液９をい
れ、圧力配管６によつてAl管２ａにその外側か
ら２Kg／cm2（ゲージ圧）の圧力をかけた。尚洗浄
液にはフロンを、シール部には４弗化エチレン樹
脂（商品名テフロン）を使用し、洗浄槽はステン
レスで構成し、洗浄槽内の温度が30℃以下になる
様に冷却器（図示せず）で冷却した。この状態で
出力600W、周波数15KHzの超音波発振器を駆動
して接着型振動子８ａにより３分間超音波洗浄を
行なつた。洗浄後金属管内にN2ガスを流して管
内に侵入したフロンを蒸発させた後レーザー溶接
によりピンホールの修理を行い、健全な溶接部を
得ることが出来た。一方従来の様に管の表面のみ
をフロンにより洗浄した後レーザー溶接を行なお
うとしたところ潤滑油がもえて煙が発生し、再溶
接部が既溶接部と密着しなく健全な溶接部を得る
ことが出来なかつた。
Next, an embodiment of the present invention will be explained in detail with reference to the drawings. As shown in FIG. 1, a cleaning tank 1a and a cover 5
After inserting the Al pipe 2a having a welding defect, for example a pinhole 3, between the seal part 4 and the cleaning tank 1a, the cleaning liquid 9 is poured into the cleaning tank 1a from the cleaning liquid piping 7, and the Al pipe 2a is inserted through the pressure piping 6 into the cleaning tank 1a. A pressure of 2 kg/cm 2 (gauge pressure) was applied to 2a from the outside. The cleaning liquid uses Freon, the seal part uses tetrafluoroethylene resin (trade name: Teflon), the cleaning tank is made of stainless steel, and a cooler (see figure) is used to keep the temperature inside the cleaning tank below 30℃. (not shown). In this state, an ultrasonic oscillator with an output of 600 W and a frequency of 15 KHz was driven to perform ultrasonic cleaning for 3 minutes using the adhesive type vibrator 8a. After cleaning, N 2 gas was flowed into the metal tube to evaporate the Freon that had entered the tube, and the pinhole was repaired by laser welding, resulting in a sound weld. On the other hand, when trying to perform laser welding after cleaning only the surface of the pipe with Freon as in the conventional method, the lubricating oil burns and smoke is generated, and the re-welded part does not come into close contact with the previously welded part, resulting in a sound welded part. I couldn't do it.
上記実施例と同様な方法でピンホール３を有す
るAl管２ａを第１図に示す洗浄槽１ａにセツト
した後、管の一方をシールして他端を真空ポンプ
に接続し、Al管２ａ内を10mmHgに減圧した。
（管の外側からの加圧は行わなかつた。）この状態
で上記実施例と同様な方法で超音波洗浄を行つた
後レーザー溶接によりピンホールの修理を行な
い、健全な溶接部を得ることが出来た。 After setting the Al pipe 2a having the pinhole 3 into the cleaning tank 1a shown in FIG. 1 in the same manner as in the above embodiment, one end of the pipe is sealed and the other end is connected to a vacuum pump, and the inside of the Al pipe 2a is The pressure was reduced to 10 mmHg.
(No pressure was applied from the outside of the pipe.) In this state, after ultrasonic cleaning was performed in the same manner as in the above example, the pinhole was repaired by laser welding, and a sound weld was obtained. done.
更に第２図に示す様に、洗浄槽１ｂとカバー５
ｂとの間にシール部４を介してピンホール３を有
するCu管２ｂをはさんだ後、管の一方をシール
して、他端を真空ポンプに接続しCu管２ｂ内を
10mmHgに減圧し、洗浄液用配管７から洗浄槽１
ｂ内に洗浄液９をいれた。洗浄液にはトリクレン
を使用し、出力600W、周波数20KHzの超音波発
振器を駆動して、投込型振動子８ｂにより５分間
超音波洗浄を行つた。洗浄後TIG溶接によりピン
ホールの修理を行い、健全な溶接部を得ることが
出来た。 Furthermore, as shown in FIG. 2, the cleaning tank 1b and the cover 5
After inserting the Cu tube 2b having the pinhole 3 between the seal part 4 and the sealing part 4, one end of the tube is sealed and the other end is connected to a vacuum pump, and the inside of the Cu tube 2b is
Reduce the pressure to 10mmHg and connect the cleaning liquid pipe 7 to the cleaning tank 1.
Cleaning liquid 9 was put into the container b. Triclean was used as the cleaning solution, and an ultrasonic oscillator with an output of 600 W and a frequency of 20 KHz was driven to perform ultrasonic cleaning for 5 minutes with an immersion type vibrator 8b. After cleaning, the pinhole was repaired by TIG welding, and a sound weld was obtained.
一方従来の様に管の表面のみをトリクレンによ
り洗浄した後TIG溶接を行おうとしたところ潤滑
油がもえて煙が発生し、再溶接部が既溶接部と密
着しなく健全な溶接部を得ることが出来なかつ
た。 On the other hand, when trying to perform TIG welding after cleaning only the surface of the pipe with Triclean as in the conventional method, the lubricating oil burns and smoke is generated, and the re-welded part does not come into close contact with the previously welded part, resulting in a sound welded part. I couldn't do it.
本発明は金属管の溶接欠陥部を超音波洗浄槽の
中に入れて金属管の外側から圧力を加えるか、ま
たは金属管内を減圧するかしてその溶接欠陥部を
超音波で洗浄するようにしたので、ピンホール等
の溶接欠陥部の内部に浸入した潤滑油等の異物を
完全に除去することが可能となり、再溶接により
健全な溶接部を得ることが出来る。
The present invention cleans the welded defective part with ultrasonic waves by placing the welded defective part of the metal pipe in an ultrasonic cleaning tank and applying pressure from the outside of the metal pipe or by reducing the pressure inside the metal pipe. Therefore, it is possible to completely remove foreign substances such as lubricating oil that have penetrated into weld defects such as pinholes, and a sound weld can be obtained by re-welding.
第１図、第２図はそれぞれ本発明の実施に使用
する超音波洗浄槽の異なる構成を示す断面図であ
り、第３図は光フアイバー入り金属管ユニツトの
構造を示す断面図である。第４図は光フアイバー
入り金属管ユニツトの製造工程図である。
１ａ……洗浄槽、１ｂ……洗浄槽、２ａ……
Al管、２ｂ……Cu管、３……ピンホール、４…
…シール部、５ａ……カバー、５ｂ……カバー、
６……圧力配管、７……洗浄液用配管、８ａ……
超音波振動子、８ｂ……超音波振動子、９……洗
浄液、１０……光フアイバー、１１……溶接部。
FIGS. 1 and 2 are sectional views showing different configurations of ultrasonic cleaning baths used in the practice of the present invention, and FIG. 3 is a sectional view showing the structure of a metal tube unit containing optical fibers. FIG. 4 is a manufacturing process diagram of the optical fiber-containing metal tube unit. 1a...Cleaning tank, 1b...Cleaning tank, 2a...
Al pipe, 2b...Cu pipe, 3...pinhole, 4...
...Seal part, 5a...Cover, 5b...Cover,
6...Pressure piping, 7...Cleaning liquid piping, 8a...
Ultrasonic transducer, 8b... Ultrasonic transducer, 9... Cleaning liquid, 10... Optical fiber, 11... Welding part.
Claims (1)
漬し該金属管の外側から金属管に圧力をかける
か、または金属管内を減圧するかして該溶接欠陥
部を超音波で洗浄することを特徴とする金属管の
溶接欠陥部の洗浄方法。1 Immerse the weld defective part of the metal pipe in an ultrasonic cleaning tank and apply pressure to the metal pipe from the outside of the metal pipe or reduce the pressure inside the metal pipe to clean the weld defect part with ultrasonic waves. A method for cleaning a welded defective part of a metal pipe, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10567186A JPS62263892A (en) | 1986-05-08 | 1986-05-08 | Cleaning method for weld defective part of metallic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10567186A JPS62263892A (en) | 1986-05-08 | 1986-05-08 | Cleaning method for weld defective part of metallic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62263892A JPS62263892A (en) | 1987-11-16 |
| JPH0328994B2 true JPH0328994B2 (en) | 1991-04-22 |
Family
ID=14413900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10567186A Granted JPS62263892A (en) | 1986-05-08 | 1986-05-08 | Cleaning method for weld defective part of metallic pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62263892A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006150248A (en) * | 2004-11-30 | 2006-06-15 | Seiko Epson Corp | Apparatus for discharging liquid droplet and ultrasonic vibration device |
| CN102553859B (en) * | 2011-12-29 | 2016-01-20 | 荣盛建设工程有限公司 | A kind of steel bar welding method |
| CN110695000A (en) * | 2018-07-10 | 2020-01-17 | 天津市优尼迪科技有限公司 | Ultrasonic cleaning process for welded stainless steel hydraulic hard tube |
| WO2022092969A1 (en) * | 2020-11-02 | 2022-05-05 | Lg Electronics Inc. | Method for manufacturing vacuum adiabatic body |
| CN114733846B (en) * | 2022-04-24 | 2024-03-15 | 国核宝钛锆业股份公司 | Ultrasonic cleaning device and method for outer surface of zirconium alloy pipe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5744490A (en) * | 1980-08-28 | 1982-03-12 | Kobe Steel Ltd | Welded joint structure consisting of austenitic alloy steel |
-
1986
- 1986-05-08 JP JP10567186A patent/JPS62263892A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5744490A (en) * | 1980-08-28 | 1982-03-12 | Kobe Steel Ltd | Welded joint structure consisting of austenitic alloy steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62263892A (en) | 1987-11-16 |
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