JPS5861461A - Spraying method for magnetic particle liquid in magnetic particle flaw detection - Google Patents
Spraying method for magnetic particle liquid in magnetic particle flaw detectionInfo
- Publication number
- JPS5861461A JPS5861461A JP16013281A JP16013281A JPS5861461A JP S5861461 A JPS5861461 A JP S5861461A JP 16013281 A JP16013281 A JP 16013281A JP 16013281 A JP16013281 A JP 16013281A JP S5861461 A JPS5861461 A JP S5861461A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic particle
- magnetic powder
- powder liquid
- particle liquid
- liquid
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
Abstract
Description
【発明の詳細な説明】
この発明は湿式磁粉探傷において被検査物の表面に磁粉
液を散布する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of spraying magnetic particle liquid onto the surface of an object to be inspected in wet magnetic particle flaw detection.
湿式磁粉探傷において磁粉液の散布方法は欠陥検出の感
度および探傷コストに大きな影響を与える。In wet magnetic particle flaw detection, the method of dispersing magnetic particle liquid has a great influence on the sensitivity of defect detection and the flaw detection cost.
従来、磁粉液は被検査物の表面にシャワー状に散布され
ていた。第１図は従来の散布方法の一例を示すものであ
る。Conventionally, magnetic powder liquid has been sprinkled on the surface of an object to be inspected in a shower-like manner. FIG. 1 shows an example of a conventional spraying method.
この図面に示すように、被検査物であるビレットＡはこ
れ５の長手方向に移送される。ビレットへの直下には電
磁石よりなる磁化装置１が配置されている。磁粉液散布
装置２は磁化装置１の手前においてビレットＡの上方に
配置されている。磁粉液散布装置２は磁粉液槽３から圧
送ポンプ４により配管５を介して磁粉液が供給される。As shown in this drawing, the billet A, which is the object to be inspected, is transported in the longitudinal direction of the billet 5. A magnetization device 1 consisting of an electromagnet is arranged directly below the billet. The magnetic powder liquid dispersion device 2 is arranged above the billet A in front of the magnetization device 1. The magnetic powder liquid dispersing device 2 is supplied with magnetic powder liquid from a magnetic powder liquid tank 3 via a piping 5 by a pressure pump 4 .
また、磁粉液散布装置２はビレットＡの幅方向に並ぶ数
本の散布ノズル６を備えている。Further, the magnetic powder liquid dispersing device 2 includes several dispersing nozzles 6 arranged in the width direction of the billet A.
探傷はビレッ）Ａを移送しながら連続的に行われる。こ
のとき、磁粉液はビレット八表面に十分に、かつ一様に
散布しなければならない。したがって、従来の散布方法
では、散布の不足および不均一を避けるために欠陥検出
に必要な散布量以上の磁粉液を散布していた。このため
に、散布ノズル６は流出口を６．５〜１２．７ｍと大き
な直径とし、また数本をビレット幅方向に配列していた
。前記圧送ポンプ４は磁粉液を磁粉液槽３から単に磁粉
液散布装置２のヘッダー７に送るのみで、磁粉液を加圧
して散布ノズル６から噴射しようとするものではない。Flaw detection is carried out continuously while transferring billet A. At this time, the magnetic powder liquid must be sufficiently and uniformly spread over the billet surface. Therefore, in the conventional spraying method, in order to avoid insufficient and uneven spraying, magnetic powder liquid is sprayed in an amount greater than that required for defect detection. For this purpose, the spray nozzles 6 had an outlet with a large diameter of 6.5 to 12.7 m, and several spray nozzles 6 were arranged in the width direction of the billet. The pressure pump 4 merely sends the magnetic powder liquid from the magnetic powder liquid tank 3 to the header 7 of the magnetic powder liquid spraying device 2, and does not pressurize the magnetic powder liquid and spray it from the spray nozzle 6.
上記のように従来の散布方法では被検査物に余分の磁粉
液を散布する。したがって、磁粉液の経済を図るために
余分の磁粉液（被検査物に付着して持ち出されたものの
残り）は、第１図に示すように磁化装置ｌの下方に配置
された液受け８により回収される。回収された磁粉液は
磁粉液槽３に送られ、循環使用される。As described above, in the conventional spraying method, excess magnetic powder liquid is sprayed onto the object to be inspected. Therefore, in order to save money on the magnetic powder liquid, excess magnetic powder liquid (remaining particles that have adhered to the object to be inspected and taken out) is collected by a liquid receiver 8 disposed below the magnetization device l as shown in FIG. It will be collected. The recovered magnetic powder liquid is sent to the magnetic powder liquid tank 3 and used for circulation.
ところで、上記のような従来の散布方法では次のような
欠点があった。However, the conventional dispersion method as described above has the following drawbacks.
（１） 被検査物のスケール、研削粉等が混入して磁
粉液の磁粉濃度が変化する。(1) Scale of the object to be inspected, grinding powder, etc. are mixed in, and the magnetic particle concentration of the magnetic powder liquid changes.
（２）磁粉液が、経時変化により劣化する。(2) Magnetic powder liquid deteriorates over time.
（３）散布停止時に磁粉液中の磁粉、スケール、研削粉
等が沈澱して配管、散布装置等に拮りを生じる。(3) When the spraying is stopped, the magnetic particles, scale, grinding powder, etc. in the magnetic powder liquid settle, causing blockages in piping, spraying equipment, etc.
したがって、必要とする一定の欠陥検出感度で探傷する
ためには、常に磁粉液の適正な濃度管理を行わねばなら
ない。また、詰りによる装置の手入れも頻堵に行わなけ
ればならない。Therefore, in order to perform flaw detection with the required constant defect detection sensitivity, it is necessary to always manage the concentration of the magnetic powder liquid appropriately. Additionally, the equipment must be frequently cleaned due to clogging.
この発明は、従来の磁粉液散布方法における上記のよう
な欠点を改良するためになされたもので、磁粉液の循環
使用により濃度管理および磁粉等の詰りによる装置の手
入れが不要であり、探傷作業の簡便化を図ることができ
る磁粉探傷における磁粉液散布方法を提供しようとする
ものである。This invention was made in order to improve the above-mentioned drawbacks of the conventional magnetic powder liquid dispersion method.By circulating the magnetic powder liquid, there is no need for concentration control or maintenance of the equipment due to clogging with magnetic particles, etc., and flaw detection work is eliminated. It is an object of the present invention to provide a method for dispersing magnetic particle liquid in magnetic particle flaw detection, which can simplify the process.
この発明では、磁粉液を加圧し、散布ノズルにより磁粉
液を噴霧状にして被検査物の表面に散布する。In this invention, the magnetic powder liquid is pressurized, and a spray nozzle sprays the magnetic powder liquid onto the surface of the object to be inspected.
磁粉液を噴霧状にして散布すると、従来のシャワー状に
して散布するのに比べて散布量は％〜％で済む。実験の
結果によれば、このような少量の散布であっても欠陥検
出感度は低下することはない。また、噴霧状に散布する
ことにより、磁粉液は広い範囲に一様に広がり、散布ノ
ズルは１本でよい。When the magnetic powder liquid is spread in the form of a spray, the amount of spraying is only % to % compared to the conventional method of spraying it in the form of a shower. According to experimental results, even with such a small amount of spraying, the defect detection sensitivity does not decrease. Further, by dispersing the powder in a spray form, the magnetic powder liquid is uniformly spread over a wide range, and only one dispersion nozzle is required.
この発明では、散布量が上述のように少いので、磁粉液
を使い棄てにしても従来法に比べて経済性が劣ることは
ない。従来法は磁粉液を再循環使用するものではあるが
、被検査物による磁粉液の持ち出し、磁粉液の劣化など
のため、がなりの量の磁粉液を補充しなければならない
。このように使い棄てにすると、スケール等の混入や経
時変化による劣化のために行う磁粉液の濃度管理は不要
となる。また、常に新鮮な磁粉液により探傷を行うこと
ができる。In this invention, since the amount of spraying is small as described above, the economical efficiency is not inferior to the conventional method even if the magnetic powder liquid is discarded. Although the conventional method recirculates and uses the magnetic powder liquid, it is necessary to replenish a large amount of the magnetic particle liquid because of the removal of the magnetic particle liquid by the object to be inspected and the deterioration of the magnetic particle liquid. If it is discarded in this way, there is no need to manage the concentration of the magnetic powder liquid due to contamination with scale or the like and deterioration due to changes over time. In addition, flaw detection can always be performed using fresh magnetic powder liquid.
さらに、この発明では前述のように磁粉液を加圧して散
布ノズルにより噴射するので、配管、ノズル等に磁粉が
多少沈積していても詰りを生じることはない。Furthermore, in the present invention, as described above, the magnetic powder liquid is pressurized and sprayed through the spray nozzle, so even if some magnetic powder is deposited in piping, nozzles, etc., clogging will not occur.
発明者達の実、験の結果によると、欠陥検出感度および
磁粉液の経済の点がら、探傷条件（磁化の方法と強さ、
磁粉の磁気的性質と大きさ、磁粉液の濃度、探傷範囲等
）によって若干変るが、ノズルの噴出径は２〜７靭、噴
霧圧は０．３〜２ ｋｉ９ ／ｃｉ、Ｉｌｔ＆！０．５
〜２１／ｒ１１ｉｎ程度が適当である。According to the inventors' actual experimental results, flaw detection conditions (magnetization method and strength,
Although it varies slightly depending on the magnetic properties and size of the magnetic powder, the concentration of the magnetic powder liquid, the flaw detection range, etc.), the jet diameter of the nozzle is 2 to 7 mm, the spray pressure is 0.3 to 2 ki9/ci, Ilt&! 0.5
~21/r11 inch is appropriate.
つぎに、この発明の方法を実施する装置例と共にこの発
明を更に具体的に説明する。Next, the present invention will be explained in more detail along with an example of an apparatus for carrying out the method of the present invention.
第２図はこの発明の方法を実施する装置の一例を示すも
ので、装置の構成図である。この図面に示すように、磁
化装置１１および磁粉液散布装置１２のビレツｌ−Ａに
対する配置は従来の装置と同じである。FIG. 2 shows an example of an apparatus for carrying out the method of the present invention, and is a block diagram of the apparatus. As shown in this drawing, the arrangement of the magnetizing device 11 and the magnetic powder liquid dispersing device 12 with respect to the billet I-A is the same as that of the conventional device.
磁粉液散布装置１２には磁粉液槽１３がら磁粉液が圧送
される。すなわち、磁粉液槽１３の底部から延びる入側
管１４に止め弁１−５、圧送ポンプ１６および電磁式方
向切換弁１７が取り付けられている。また、圧送ポンプ
１６の出側において入側管１４は止め弁１９を備えた循
環管１８を介して磁粉液槽１３に連絡している。方向切
換弁１７の一方の出側ボートと磁粉液散布装置１２とは
可変流量調整弁２１を備えた出側管接続されている。Magnetic powder liquid is force-fed to the magnetic powder liquid dispersing device 12 from a magnetic powder liquid tank 13 . That is, a stop valve 1-5, a pressure pump 16, and an electromagnetic directional control valve 17 are attached to an inlet pipe 14 extending from the bottom of the magnetic powder liquid tank 13. Further, on the outlet side of the pressure pump 16, the inlet pipe 14 is connected to the magnetic powder liquid tank 13 via a circulation pipe 18 equipped with a stop valve 19. One outlet boat of the directional switching valve 17 and the magnetic powder liquid spraying device 12 are connected to an outlet pipe provided with a variable flow rate regulating valve 21 .
磁粉液散布装置１２のノズルチップ２３は第３図に示す
ように、ビレットＡの進行方向に対して後方に若干傾斜
している。傾斜角度θは１０〜６０度程度である。第４
図および第５図に示すように、ノズルチップ器の先端に
は、噴霧がビレットＡの幅方向に広がるように横溝冴が
切っである。ノズル噴出口５０直径ｄは４顛である。As shown in FIG. 3, the nozzle tip 23 of the magnetic powder spraying device 12 is slightly inclined rearward with respect to the traveling direction of the billet A. The inclination angle θ is about 10 to 60 degrees. Fourth
As shown in the figure and FIG. 5, a horizontal groove is cut at the tip of the nozzle tip so that the spray spreads in the width direction of the billet A. The diameter d of the nozzle outlet 50 is 4 sizes.
以上のように構成された装置において、圧送ポンプ１６
は常時駆動されている。方向切換弁１７の操作位置がａ
（第２図参照）の場合、入側管１４と出側管２０の連絡
は断たれ、磁粉液の散布は停止されている。このとき、
圧送ポンプ１６からの磁粉液はすべて循環管１８より磁
粉液槽１３に戻される。戻された磁粉液は磁粉液槽１３
内にこれの円周方向に噴出され、槽内の磁粉液を攪拌す
る。方向切換弁１７を操作位置すに切り換えると、入側
管１４と出側管加とは連絡し、散布ノズル２２より磁粉
液が扇状に広がるようにして噴霧状に散布される。槓４
量は流量調整弁２１によって調節される。この実施例で
は、噴霧圧は０．３に９／ｃｔＡ、噴霧量は１．８ Ａ
／ｍｉｎである。なお、噴４に余分の磁粉液は循環管１
８および戻り管２２を通じて磁粉液槽１３に戻される。In the device configured as above, the pressure pump 16
is constantly driven. The operating position of the directional control valve 17 is a
In the case (see FIG. 2), the communication between the inlet pipe 14 and the outlet pipe 20 is cut off, and the dispersion of the magnetic powder liquid is stopped. At this time,
All of the magnetic powder liquid from the pressure pump 16 is returned to the magnetic powder liquid tank 13 through the circulation pipe 18. The returned magnetic powder liquid is sent to the magnetic powder liquid tank 13.
The magnetic powder is ejected in the circumferential direction of the tank, stirring the magnetic powder liquid inside the tank. When the directional control valve 17 is switched to the operating position, the inlet pipe 14 and the outlet pipe are connected, and the spray nozzle 22 spreads the magnetic powder liquid in the form of a spray. Sword 4
The amount is regulated by a flow rate regulating valve 21. In this example, the spray pressure was 0.39/ctA and the spray amount was 1.8 A.
/min. In addition, the excess magnetic powder liquid in the jet 4 is removed from the circulation pipe 1.
8 and return pipe 22 to the magnetic powder liquid tank 13.
磁粉液槽１３には所要の濃度の磁粉液があらかじめ供給
されており、探傷作業により減少した分は時々補給され
る。Magnetic powder liquid of a required concentration is supplied in advance to the magnetic powder liquid tank 13, and the amount reduced due to flaw detection work is replenished from time to time.
磁粉液の散布は方向切換弁１７を自動的に操作して、ビ
レツ）Ａが磁粉液散布装置１２の下方を通過していると
きのみ行われる。Spraying of the magnetic powder liquid is carried out only when the billet A is passing below the magnetic powder liquid spraying device 12 by automatically operating the directional control valve 17.
以上、この発明の方法を探傷方式が極間法である場合に
ついて説明したが、その他の探傷方式、すなわちプロッ
ト法、貫通法などにもこの発明の方法は適用されるもの
である。また、被検査物もビレットに限られるものでは
なく、鋳放品、機械加工部品などの磁粉探傷にもこの発
明の方法は適用される。ノズルチップの溝の大きさ、形
状も被検査物の寸法および形状に応じて適当に選ばれる
。Although the method of the present invention has been described above in the case where the flaw detection method is the gap method, the method of the present invention is also applicable to other flaw detection methods, such as the plot method and the penetration method. Further, the object to be inspected is not limited to billets, and the method of the present invention is also applicable to magnetic particle flaw detection of as-cast products, machined parts, and the like. The size and shape of the groove of the nozzle tip are also appropriately selected depending on the size and shape of the object to be inspected.
さらにまた、磁粉液槽内の磁粉液を槽内に設けた攪拌羽
根によって攪拌するようにしてもよい。Furthermore, the magnetic powder liquid in the magnetic powder liquid tank may be stirred by a stirring blade provided in the tank.
第１図は従来の磁粉液散布方法を説明するもので、磁化
装置を含む磁粉液散布装置の斜視図、第２図はこの発明
の方法を実施する装置の一例を示すもので、装置の構成
図、第３図はこの発明の方法により磁粉液を散布してい
る状態を示す斜視図、第４図および第５図はそれぞれ磁
粉液噴霧ノズルチップの詳細を示す斜視図および断面図
である。
１．１１・・・磁化装置、２．１２・・・磁粉液散布装
置、３．１３・・・磁粉液槽、４．１６・・・圧送ポン
プ、１７・・・方向切換弁、２１・・・流量調整弁。
特許出願人代理人 弁理士矢 葺 知 之 （ほか１名
）第１図
第２図FIG. 1 is a perspective view of a conventional magnetic powder dispersion method, and is a perspective view of a magnetic powder dispersion device including a magnetization device. FIG. Figures 3 and 3 are perspective views showing the state in which magnetic powder liquid is being sprayed by the method of the present invention, and Figures 4 and 5 are perspective views and cross-sectional views, respectively, showing details of the magnetic powder liquid spray nozzle tip. 1.11... Magnetizer, 2.12... Magnetic powder liquid dispersion device, 3.13... Magnetic powder liquid tank, 4.16... Pressure pump, 17... Directional switching valve, 21...・Flow rate adjustment valve. Patent applicant's agent: Patent attorney Tomoyuki Ya Fuki (and 1 other person) Figure 1 Figure 2
Claims (1)
て被検査物の表面に散布することを特徴とする磁粉探傷
における磁粉液散布方法。A magnetic powder liquid dispersion method for magnetic particle flaw detection, characterized in that the magnetic powder liquid is pressurized and the magnetic powder liquid is atomized and sprayed onto the surface of an object to be inspected using a dispersion nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16013281A JPS5861461A (en) | 1981-10-09 | 1981-10-09 | Spraying method for magnetic particle liquid in magnetic particle flaw detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16013281A JPS5861461A (en) | 1981-10-09 | 1981-10-09 | Spraying method for magnetic particle liquid in magnetic particle flaw detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5861461A true JPS5861461A (en) | 1983-04-12 |
Family
ID=15708556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16013281A Pending JPS5861461A (en) | 1981-10-09 | 1981-10-09 | Spraying method for magnetic particle liquid in magnetic particle flaw detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5861461A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6046368A (en) * | 1983-08-23 | 1985-03-13 | Showa Denko Kk | Sputtering target |
| CN107831212A (en) * | 2017-10-14 | 2018-03-23 | 胡振锋 | A kind of machine components failure detector |
-
1981
- 1981-10-09 JP JP16013281A patent/JPS5861461A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6046368A (en) * | 1983-08-23 | 1985-03-13 | Showa Denko Kk | Sputtering target |
| JPS6331550B2 (en) * | 1983-08-23 | 1988-06-24 | Showa Denko Kk | |
| CN107831212A (en) * | 2017-10-14 | 2018-03-23 | 胡振锋 | A kind of machine components failure detector |
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