JPS6398559A - Magnetic powder flaw detection apparatus - Google Patents
Magnetic powder flaw detection apparatusInfo
- Publication number
- JPS6398559A JPS6398559A JP24406286A JP24406286A JPS6398559A JP S6398559 A JPS6398559 A JP S6398559A JP 24406286 A JP24406286 A JP 24406286A JP 24406286 A JP24406286 A JP 24406286A JP S6398559 A JPS6398559 A JP S6398559A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- flaw detection
- inspected
- pole
- core
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000006249 magnetic particle Substances 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は磁粉探傷装置、特に長尺材料をこわの長平方
向に送りなが磁粉探傷する装置に関する。この発明の磁
粉探傷装置は、溝型鋼などの型鋼やシートパイルその他
長尺材料の磁粉探傷に適用される。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a magnetic particle flaw detection device, and more particularly to a device for detecting magnetic particle flaws while feeding a long material in the longitudinal direction of its stiffness. The magnetic particle flaw detection apparatus of the present invention is applied to magnetic particle flaw detection of shaped steel such as channel steel, sheet piles, and other long materials.
（従来の技術）
型鋼なとの長尺材料は、これを長手方向に送りなから磁
粉探傷装置を通過させて、連続的に磁粉探傷を行なう。(Prior Art) A long material such as a shaped steel is fed in the longitudinal direction and passed through a magnetic particle flaw detection device to continuously perform magnetic particle flaw detection.
磁粉探傷装置は、材料の移送方向に沿って順次配列され
た磁粉散布装置、磁化装置および磁粉模様検出装置によ
り構成されている。The magnetic particle flaw detection device includes a magnetic particle scattering device, a magnetization device, and a magnetic particle pattern detection device that are sequentially arranged along the material transport direction.
形鋼などのように側端にコーナ一部分を持つ材料では、
コーナ一部分は圧延時に大きく変形されるので欠陥が生
じ易い。したがって、このような材料ではコーナ一部分
を主として、たとえば側端から中央部に向かってほぼ５
０ｍｍ程度の範囲について磁粉探傷を行なっている。For materials that have a corner at the side end, such as shaped steel,
A portion of the corner is greatly deformed during rolling, so defects are likely to occur. Therefore, in such a material, the corner portion is mainly used, for example, from the side edge to the center portion, approximately 5
Magnetic particle flaw detection is performed in a range of approximately 0 mm.
従来の磁化装置は鉄心断面がＵ字形をしており、二つの
磁極が材料の両側端のコーナ一部分にそれぞれ向かうよ
うにして材料の直下に配置されている。A conventional magnetizing device has a core having a U-shaped cross section, and two magnetic poles are placed directly under the material so as to face a portion of each corner on both sides of the material.
（発明が解決しようとする問題点）
長尺材料は幅の種類が多く、たとえば溝形鋼の場合ては
４００ｍｍ〜９００ ｍｍの範囲で材料幅が変化する。(Problems to be Solved by the Invention) Long materials have many different widths; for example, in the case of channel steel, the material width varies in the range of 400 mm to 900 mm.
このような幅が広く変化する材料を１台の磁粉探傷装置
では探傷できなかった。すなわち、従来の装置では二つ
の磁極は固定されているので、たとえば磁極間距離を狭
い材料幅に合せて設計した場合、幅広の材料ではコーナ
一部分が磁極から遠く離れ、コーナ一部分を探傷に必要
な磁場の強さに磁化することができない。また、幅広の
材料に対応して磁極間距離を大きくすると、磁場の強さ
が弱くなり、必要な欠陥検出能力が得られなかった。It has not been possible to detect such widely varying materials with a single magnetic particle flaw detector. In other words, in conventional equipment, the two magnetic poles are fixed, so for example, if the distance between the magnetic poles is designed to match a narrow material width, a corner of a wide material will be far away from the magnetic pole, and a corner that is necessary for flaw detection will be It cannot be magnetized by the strength of the magnetic field. Furthermore, when increasing the distance between the magnetic poles to accommodate wider materials, the strength of the magnetic field weakens, making it impossible to obtain the necessary defect detection ability.
第５図は溝形鋼において側端から中央部に向かう距離ｄ
とウェブ表面における磁場の強さＨとの関係の一例を示
すグラフである。グラフは同図の曲線Ａおよび曲線Ｂか
ら明らかなように、ＷＬ極からコーナ一部分までの水平
圧ｔｓａが１００ｍｍであると、探傷範囲 （距離ｄが
０から５０ｍｍに至る範囲）における磁場の強さＨは、
探傷に必要な磁場の強さ １０００ｅ以下となっている
。Figure 5 shows the distance d from the side edge to the center of the channel steel.
2 is a graph showing an example of the relationship between the magnetic field strength H and the magnetic field strength H on the web surface. As is clear from curves A and B in the graph, when the horizontal pressure tsa from the WL pole to a part of the corner is 100 mm, the strength of the magnetic field in the flaw detection range (distance d ranges from 0 to 50 mm) H is
The strength of the magnetic field required for flaw detection is 1000e or less.
このような問題は材料幅についてだけではなく、材料が
長手方向すなわち移送方向について曲がっている場合に
ついても生しる。材料の曲かりによフて、材料のコーナ
一部分が磁極から遠く離れるからである。Such problems arise not only with respect to the width of the material, but also when the material is curved in the longitudinal direction, ie, in the transport direction. This is because due to the bending of the material, a portion of the corner of the material is far away from the magnetic pole.
そこで、この発明は探傷する材料の幅が大きく変化して
も、あるいは材料がこれの長手方向に曲かっていても、
コーナ一部分を所要の磁場の強さに磁化することができ
る磁粉探傷装置を提供しようとするものである。Therefore, this invention can detect flaws even if the width of the material to be detected changes greatly or even if the material is bent in the longitudinal direction.
The present invention aims to provide a magnetic particle flaw detection device that can magnetize a portion of a corner to a required magnetic field strength.
（問題点を解決するための手段）
この発明の磁粉探傷装置は、磁化装置の鉄心が材料の幅
中央部に向かう第１磁極と、材料の両側端部または両側
端部の近傍にそれぞれ向かう一対の第２磁極とを備えて
いる。そして、第１磁極と第２磁極との極性が互いに逆
となるように前記鉄心に磁化コイルが巻かれている。(Means for Solving the Problems) The magnetic particle flaw detection device of the present invention has a first magnetic pole in which the iron core of the magnetizing device is directed toward the center of the width of the material, and a pair of magnetic poles that are directed toward both ends of the material or in the vicinity of both ends. and a second magnetic pole. A magnetized coil is wound around the iron core so that the first magnetic pole and the second magnetic pole have opposite polarities.
鉄心は第１磁極および第２磁極を備えているので、縦断
面は大体において山形をしている。鉄心は第１磁極およ
び第２磁極が材料の幅方向に一列に並んだ形状が望まし
いが、装置配置のスペースなどの関係から磁極どうしを
互いに材料の移送方向に若干ずらすようにして配置して
もよい。また、鉄心の第２磁極がそれぞれ材料幅方向に
変位可能なように構成してもよい。Since the iron core is provided with a first magnetic pole and a second magnetic pole, its vertical cross section is generally chevron-shaped. It is desirable that the iron core has a shape in which the first magnetic pole and the second magnetic pole are lined up in a line in the width direction of the material, but due to space constraints in the equipment arrangement, it is also possible to arrange the magnetic poles so that they are slightly offset from each other in the direction of material transfer. good. Further, the second magnetic poles of the iron core may be configured to be movable in the width direction of the material.
上記のように構成された磁化装置を、移送方向に沿って
複数台配列するようにしてもよい。磁化装置の台数は主
として材料の移送速度に依存し、移送速度が高くなると
台数を増すようにする。A plurality of magnetization devices configured as described above may be arranged along the transfer direction. The number of magnetization devices depends mainly on the material transfer speed, and the higher the transfer speed, the larger the number of magnetization devices.
（作用）
この発明の磁粉探傷装置では、材料の幅中央部に向かう
第１ｖＩ！を極と、材料の両側端部または両側端部の近
傍にそれぞれ向かう一対の第２磁極との３個の磁極を備
えている。したがって、隣り合う磁極間の距離が小さく
なり、材料を探傷に必要な磁場の強さで磁化することが
できる。(Function) In the magnetic particle flaw detection device of the present invention, the first vI toward the center of the width of the material! and a pair of second magnetic poles facing toward either side ends of the material or near both side ends. Therefore, the distance between adjacent magnetic poles becomes small, and the material can be magnetized with the strength of the magnetic field necessary for flaw detection.
また、第２磁極をそれぞれ材料幅方向に変位可能な構造
とすると、材料幅が変化しても磁極を常にコーナ一部分
に近接させることができる。したがって、材料幅が大き
く変化してもコーナ一部分を十分に磁化することができ
る。Moreover, if the second magnetic poles are structured to be movable in the material width direction, the magnetic poles can always be brought close to a part of the corner even if the material width changes. Therefore, even if the material width changes significantly, a portion of the corner can be sufficiently magnetized.
（実施例）
第１図および第２図はこの発明の一実施例を示すもので
、第１図は溝形鋼用磁粉探傷装置の平面図、および第２
図は第１図に示す装置の一部側面図である。(Example) Figures 1 and 2 show an example of the present invention. Figure 1 is a plan view of a magnetic particle flaw detection device for channel steel, and
The figure is a partial side view of the apparatus shown in FIG. 1.
これら図面に示すように、磁粉探傷装置は主として溝形
鋼Ｍの移送方向に沿って順次配列された。As shown in these drawings, the magnetic particle flaw detectors were arranged sequentially mainly along the direction of conveyance of the channel steel M.
磁粉散布装置１、磁化装置４および磁粉模様検出装置１
７により構成されている。Magnetic powder scattering device 1, magnetization device 4, and magnetic particle pattern detection device 1
7.
磁粉散布装置１はスプレーノズル２を備えており、スプ
レーノズル２には磁粉液が磁粉液タンクからポンプ（い
ずれも図示しない）により圧送されてくる。スプレーノ
ズル２は溝形鋼Ｍの移送方向について上流側に向かうよ
うにしてコーナ一部分Ｎに向いており、圧送されてきた
磁粉液はコーナ一部分Ｎに散布される。The magnetic powder dispersing device 1 includes a spray nozzle 2, to which magnetic powder liquid is force-fed from a magnetic powder liquid tank by a pump (none of which is shown). The spray nozzle 2 is oriented toward the corner portion N so as to face upstream in the direction of conveyance of the channel steel M, and the magnetic powder liquid that has been pressure-fed is sprayed onto the corner portion N.
第３図に示すように、磁化装置４の鉄心５はベース６お
よび左右一対の可動コアＩＯとからなっている。ベース
６の中央部から固定コア７が突出しており、側端寄りに
はあり溝 （図示しない）が切られている。あり溝に可
動コア１０の脚部はめ合っており、可動コアｌＯは左右
に、すなわち溝形鋼Ｍの幅方向に変位可能である。固定
コア７の先端部が第１磁極８に、また可動コアＩＯの先
端部が第２磁極Ｉ＋にそれぞれなっている。第４図に示
すように第１磁極８がＮ極となるように、また第２磁極
１１がＳ極となるように固定コア７および可動コアＩＯ
にそれぞれ磁化コイル１３が巻かれている。As shown in FIG. 3, the iron core 5 of the magnetizing device 4 includes a base 6 and a pair of left and right movable cores IO. A fixed core 7 protrudes from the center of the base 6, and a dovetail groove (not shown) is cut near the side edge. The legs of the movable core 10 are fitted into the dovetail grooves, and the movable core IO is movable left and right, that is, in the width direction of the channel steel M. The tip of the fixed core 7 serves as a first magnetic pole 8, and the tip of the movable core IO serves as a second magnetic pole I+. As shown in FIG. 4, the fixed core 7 and the movable core IO are connected so that the first magnetic pole 8 becomes the north pole and the second magnetic pole 11 becomes the south pole.
A magnetizing coil 13 is wound around each.
磁化コイル１３には交流電源Ｉ５が接続されている。An AC power source I5 is connected to the magnetizing coil 13.
上記のように構成された磁化装置４が、溝形鋼Ｍの移送
方向に沿って４台配列されている。Four magnetization devices 4 configured as described above are arranged along the direction in which the channel steel M is transferred.
磁粉模様検出装置１７は上流側から水切りブロワ１８、
ブラックライト１９、および左右一対のＩＴＶカメラ２
０が順次配列されている。水切りブロワ１８はコーナ一
部分Ｎに付着した余分の、磁粉液を吹き飛ばす。ブラッ
クライト１９は紫外線を照射して磁粉模様中の蛍光体を
発光させ、磁粉模様を鮮明にする。ＩＴＶカメラ２０は
コーナ一部分Ｎを走査し、磁粉模様を検出する。ＩＴＶ
カメラ２０にはフレームメモリ２２、画面合成装置２３
、モニターテレビ２４が順次接続されている。ＩＴＶカ
メラ２０で撮影されたコーナ一部分Ｎの左右の画像は別
々にフレームメモリ２２に一旦記憶される。そして、フ
レームメモリ２２から呼び出された画像は、画面合成装
置２３を経てモニターテレビ２４に左右または上下に独
立して再生される。また、フレームメモリ２２には画像
信号処理装置２６が接続されており、ここで処理された
画像信号はコンピュータ （図示しない）に送られ、コ
ンピュータは検出した欠陥の合否を判断する。The magnetic particle pattern detection device 17 includes a drain blower 18 from the upstream side,
Black light 19 and a pair of left and right ITV cameras 2
0's are arranged sequentially. The draining blower 18 blows away the excess magnetic powder liquid adhering to the corner part N. The black light 19 irradiates ultraviolet rays to cause the fluorescent substance in the magnetic particle pattern to emit light, thereby making the magnetic particle pattern clear. The ITV camera 20 scans a portion N of the corner and detects the magnetic particle pattern. ITV
The camera 20 includes a frame memory 22 and a screen composition device 23.
, monitor television 24 are connected in sequence. The left and right images of the corner portion N taken by the ITV camera 20 are temporarily stored separately in the frame memory 22. The images read from the frame memory 22 are then reproduced independently on the left and right or top and bottom on the monitor television 24 via the screen composition device 23. Further, an image signal processing device 26 is connected to the frame memory 22, and the image signal processed here is sent to a computer (not shown), and the computer determines whether the detected defect is acceptable or not.
前記第５図に示す曲線Ｃおよび曲線りから明らかなよう
に、水平距＃１が２００ｍｍと大きくなっても、磁場の
強さＨは探傷に必要な磁場の強さ ＋０００ｅ以上とな
っている。As is clear from the curve C and the curve shown in FIG. 5, even if the horizontal distance #1 is as large as 200 mm, the magnetic field strength H is greater than +000e, which is the magnetic field strength required for flaw detection.
（発明の効果）
この発明の磁粉探傷装置では、材料の幅中央部に向かう
第１磁極８と、材料の両側端部または両側端部の近傍に
それぞれ向かう一対の第２磁Ｖｉｔｔとの３個の磁極を
備えている。したがって、隣り合う磁極間の距離が小さ
くなり、探傷に必要な磁場の強さで材料のコーナ一部分
Ｎを磁化することができる。これより、材料の幅が変化
しても、あるいは材料がこれの長手方向に曲がっていて
も探傷可能である。(Effects of the Invention) The magnetic particle flaw detection device of the present invention has three magnetic poles: a first magnetic pole 8 directed toward the center of the width of the material, and a pair of second magnetic poles 8 directed toward both ends or near both ends of the material. It has magnetic poles. Therefore, the distance between adjacent magnetic poles becomes small, and a corner portion N of the material can be magnetized with the strength of the magnetic field necessary for flaw detection. This allows flaw detection even if the width of the material changes or even if the material is bent in its longitudinal direction.
第１図および第２図はこの発明の一実施例を示すもので
、第１図は溝形鋼Ｍ用磁粉探傷装置の平面図、および第
２図は第１図に示す装置の一部側面図である。第３図は
磁化装置を示す正面図、および第４図は磁化装置の磁化
コイルの説明図である。第５図は溝形鋼Ｍにおいて側端
から中央部に向かう距１１１ｄとウェブ表面における磁
場の強さＨとの関係の一例を示すグラフである。
１・・・磁粉散布装置、４・・・磁化装置、５・・・鉄
心、６・・・ベース、７・・・固定コア、８・・・第１
磁極、ｌＯ・・・可動コア、１１−・・第２磁極％１
：ｌ−・・磁化コイル、Ｉ ５−・・交流電源、１７−
・・欠陥検出装置、１８・・・水切りブロア、１９−・
・ブラックライト、２０・・・■Ｔｖカメラ、２２・・
・フレームメモリ、２３−・・画像合成装置、２４・・
・モニターテレビ、２６−・・画像信号処理装置。
−３Ｑ６−
Ａ、Ｂ。1 and 2 show one embodiment of the present invention, FIG. 1 is a plan view of a magnetic particle flaw detection device for channel steel M, and FIG. 2 is a partial side view of the device shown in FIG. 1. It is a diagram. FIG. 3 is a front view showing the magnetizing device, and FIG. 4 is an explanatory diagram of the magnetizing coil of the magnetizing device. FIG. 5 is a graph showing an example of the relationship between the distance 111d from the side end toward the center of the channel steel M and the strength H of the magnetic field on the web surface. DESCRIPTION OF SYMBOLS 1... Magnetic powder scattering device, 4... Magnetizing device, 5... Iron core, 6... Base, 7... Fixed core, 8... First
Magnetic pole, lO...Movable core, 11-...Second magnetic pole%1
: l-... Magnetizing coil, I 5-... AC power supply, 17-
... Defect detection device, 18... Draining blower, 19-.
・Black light, 20... ■TV camera, 22...
・Frame memory, 23--Image synthesis device, 24--
- Monitor TV, 26-... Image signal processing device. -3Q6- A, B.
Claims (2)
装置および磁粉模様検出装置が順次配列された装置にお
いて、前記磁化装置の鉄心が材料の幅中央部に向かう第
１磁極と、材料の両側端部または両側端部の近傍にそれ
ぞれ向かう一対の第２磁極とを備えており、第１磁極と
第２磁極との極性が互いに逆となるように前記鉄心に磁
化コイルが巻かれていることを特徴とする磁粉探傷装置
。(1) In a device in which a magnetic powder scattering device, a magnetizing device, and a magnetic particle pattern detecting device are sequentially arranged along the transport direction of a long material, the iron core of the magnetizing device has a first magnetic pole facing toward the center of the width of the material; a pair of second magnetic poles facing toward both ends or near both ends, and a magnetized coil is wound around the iron core so that the polarities of the first magnetic pole and the second magnetic pole are opposite to each other. A magnetic particle flaw detection device characterized by:
可能であることを特徴とする特許請求の範囲第１項記載
の磁粉探傷装置。(2) The magnetic particle flaw detection apparatus according to claim 1, wherein each of the second magnetic poles of the iron core is movable in the width direction of the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61244062A JPH0778490B2 (en) | 1986-10-16 | 1986-10-16 | Magnetic particle flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61244062A JPH0778490B2 (en) | 1986-10-16 | 1986-10-16 | Magnetic particle flaw detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6398559A true JPS6398559A (en) | 1988-04-30 |
| JPH0778490B2 JPH0778490B2 (en) | 1995-08-23 |
Family
ID=17113165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61244062A Expired - Lifetime JPH0778490B2 (en) | 1986-10-16 | 1986-10-16 | Magnetic particle flaw detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0778490B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7885555B2 (en) | 2008-03-12 | 2011-02-08 | Canon Kabushiki Kaisha | Image forming apparatus with multiple fixing unit attachment detection portions |
| JP2018044787A (en) * | 2016-09-12 | 2018-03-22 | マークテック株式会社 | Magnetic powder flaw detector and magnetic powder flaw detection method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5106037B2 (en) * | 2007-10-23 | 2012-12-26 | 株式会社神戸製鋼所 | Steel inspection line and steel inspection method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5159680A (en) * | 1974-11-21 | 1976-05-24 | Sumitomo Metal Ind | KOHANHYOMENKIZUKENSHUTSUSOCHI |
| JPS5168286A (en) * | 1974-12-10 | 1976-06-12 | Kobe Steel Ltd | HYOMENKIZUJIDOKENSAHOHO OYOBI SOCHI |
| JPS5555271A (en) * | 1978-09-08 | 1980-04-23 | British Steel Corp | Magnetism inspection device for thin plate or strip |
| JPS5730971A (en) * | 1980-07-31 | 1982-02-19 | Ponii Sangyo Kk | Metal detector |
-
1986
- 1986-10-16 JP JP61244062A patent/JPH0778490B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5159680A (en) * | 1974-11-21 | 1976-05-24 | Sumitomo Metal Ind | KOHANHYOMENKIZUKENSHUTSUSOCHI |
| JPS5168286A (en) * | 1974-12-10 | 1976-06-12 | Kobe Steel Ltd | HYOMENKIZUJIDOKENSAHOHO OYOBI SOCHI |
| JPS5555271A (en) * | 1978-09-08 | 1980-04-23 | British Steel Corp | Magnetism inspection device for thin plate or strip |
| JPS5730971A (en) * | 1980-07-31 | 1982-02-19 | Ponii Sangyo Kk | Metal detector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7885555B2 (en) | 2008-03-12 | 2011-02-08 | Canon Kabushiki Kaisha | Image forming apparatus with multiple fixing unit attachment detection portions |
| JP2018044787A (en) * | 2016-09-12 | 2018-03-22 | マークテック株式会社 | Magnetic powder flaw detector and magnetic powder flaw detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0778490B2 (en) | 1995-08-23 |
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