JPS6239323Y2 - - Google Patents
Info
- Publication number
- JPS6239323Y2 JPS6239323Y2 JP15114780U JP15114780U JPS6239323Y2 JP S6239323 Y2 JPS6239323 Y2 JP S6239323Y2 JP 15114780 U JP15114780 U JP 15114780U JP 15114780 U JP15114780 U JP 15114780U JP S6239323 Y2 JPS6239323 Y2 JP S6239323Y2
- Authority
- JP
- Japan
- Prior art keywords
- probes
- scanning
- intersection
- jig
- rail
- 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
Links
- 239000000523 sample Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 8
- 239000011324 bead Substances 0.000 description 10
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
この考案は超音波斜角探触子法またぎ走査にお
いて、突合せ溶接部の横割れを検出するために使
用される軽量かつ簡便な走査治具に関するもので
ある。[Detailed Description of the Invention] This invention relates to a lightweight and simple scanning jig used for detecting transverse cracks in butt welds in cross-scanning using an ultrasonic angle probe method.
突合せ溶接部に発生する横割れを超音波を用い
て探傷するための走査方法の一つとしてまたぎ走
査が考案され、すでにJIS規格（JISZ3060−
1975）にも取り入れられている。 Straddle scanning was devised as a scanning method for detecting transverse cracks that occur in butt welds using ultrasonic waves, and has already been approved by the JIS standard (JISZ3060-
1975) was also adopted.
第１図はまたぎ走査の原理を説明する図であつ
て、第２図は第１図のＡ−Ａ断面図、第３図は第
１図のＢ−Ｂ断面図である。 FIG. 1 is a diagram illustrating the principle of straddle scanning, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 1.
屈折角θを持つ１組の斜角探触子１，１′を溶
接ビード２を挾んでまたぎ角αを取つて対向さ
せ、一方より発振された超音波ビームは底面およ
び横割れ欠陥面９で反射してもう一方の探触子に
受信されるように、またはこれとは逆のルートを
たどるように両探触子の位置を定める。 A pair of bevel probes 1 and 1' having a refraction angle θ are placed across the weld bead 2 and facing each other at an angle α. Position both probes so that they are reflected and received by the other probe, or take the opposite route.
そのためには板厚ｔの試験材表面上における探
触子と欠陥の距離y1およびy2の和が2t tanθにな
るようにし、欠陥の深さに従つて両探触子をそれ
ぞれ溶接部で交叉する直線上で前後に走査させる
必要がある。 To do this, the sum of the distances y 1 and y 2 between the probe and the defect on the surface of the test material of plate thickness t should be 2t tan θ, and both probes should be placed at the weld area according to the depth of the defect. It is necessary to scan back and forth on intersecting straight lines.
しかしこのような走査はフリーバンドで行う手
動探傷では全く不可能であり、適当な治具を用い
る必要があつた。しかし、全ての方向の溶接部に
対して簡便に適用できる走査治具がなかつたた
め、またぎ走査は溶接横割れに対しては最も有効
な走査方法であるにもかかわらず、あまり実用に
供されていなかつた。 However, such scanning is completely impossible with manual flaw detection performed using a free band, and it is necessary to use an appropriate jig. However, because there was no scanning jig that could be easily applied to welds in all directions, straddle scanning was not put into practical use much despite being the most effective scanning method for transverse weld cracks. Nakatsuta.
本考案はこのような実情に鑑みなされたもので
あり、その要旨は一端を適当な角度で調整可能に
軸支した交点を有する２本のガイドレールに２個
の斜角探触子を摺動自在に設けると共に、該レー
ルの交点に固定用マグネツトを備え、かつ前記両
探触子が前記レール交点近傍を経由する可撓性連
結具で連結されていることを特徴とする超音波探
傷走査治具である。 The present invention was developed in view of these circumstances, and its gist is to slide two bevel probes onto two guide rails that have intersection points, one end of which is pivotably supported at an appropriate angle. An ultrasonic flaw detection scanning treatment characterized in that the probes can be freely installed, a fixing magnet is provided at the intersection of the rails, and both the probes are connected by a flexible connector passing through the vicinity of the intersection of the rails. It is a ingredient.
以下本考案の詳細を添付図面に従つて説明す
る。 The details of the present invention will be explained below with reference to the accompanying drawings.
第４図および第５図は本考案によるまたぎ走査
治具の態様例を説明する図である。 FIGS. 4 and 5 are diagrams illustrating an embodiment of the straddle scanning jig according to the present invention.
ガイドレール３は直線状の２本の板またはアン
グル等よりなり、適当なまたぎ角αが選定できる
ように調整可能に軸支され、その支点にマグネツ
ト４が取り付けられている。なお、該レール３は
アルミアングル等を用いれば軽量化を計ることが
できる。 The guide rail 3 is made up of two linear plates or angles, and is rotatably supported so that an appropriate straddle angle α can be selected, and a magnet 4 is attached to the fulcrum of the guide rail 3. Note that the weight of the rail 3 can be reduced by using an aluminum angle or the like.
一方、一対の斜角探触子１，１′はレール内側
に添つて自在に摺動できるように探触子センター
ラインと平行した探触子ハウジング５に取り付
け、両ハウジングは一定の長さの可撓性の連結具
６で連結される。 On the other hand, a pair of bevel probes 1 and 1' are attached to a probe housing 5 parallel to the probe center line so that they can freely slide along the inside of the rail. They are connected by a flexible connector 6.
この連結具６は第４図で示されるように、レー
ル３の内側に沿つて該レールの交点近傍を経由す
るようにして両探触子１，１′を連結するもので
あつて、材質、形状としては凸状断面の薄鋼帯
を、凸面を外側にして用うれば最良であるが、
線、ひも等を用いてもよい。ただし、ひも等を用
いる場合にはレール内側の交点近傍を必ず経由す
るようにひもを張らせながら摺動させるための滑
車（図示せず）などを設ける必要がある。 As shown in FIG. 4, this connector 6 connects both probes 1 and 1' along the inside of the rail 3 through the vicinity of the intersection of the rails, and is made of materials such as It is best to use a thin steel strip with a convex cross section, with the convex side facing outward.
A wire, string, etc. may also be used. However, if a string or the like is used, it is necessary to provide a pulley (not shown) or the like for sliding the string while tensioning it so that it always passes near the intersection on the inside of the rail.
レールの交点にはマグネツト４を取り付ける
が、このマグネツトは治具を溶接ビード２上に固
定させるためのものであり、マグネツトの強さは
球形タンクの溶接部におけるように、全ての方向
の溶接部に対して溶接ビード上で治具を吸着固定
できる程度の強さであればよい。 A magnet 4 is attached to the intersection of the rails, but this magnet is used to fix the jig onto the weld bead 2, and the strength of the magnet is such that it can withstand welds in all directions, such as in the welds of a spherical tank. It is sufficient that the strength is strong enough to suction and fix the jig on the weld bead.
また、レールの端部に取り付けた高さ調整ネジ
８は、ビードの高さに応じて治具を試験材表面と
平行に保持すべく高さ調整を行うためのものであ
る。 Further, the height adjustment screw 8 attached to the end of the rail is used to adjust the height of the jig in accordance with the height of the bead so as to hold the jig parallel to the surface of the test material.
治具の移動はマグネツト４をビード上に吸着さ
せたままビード方向に板面上をスライドさせれ
ば、ビード凹凸のため摩擦力は小さいので、容易
にビード上をスライドさせることができる。 The jig can be moved easily by sliding the jig on the plate surface in the direction of the bead with the magnet 4 adsorbed onto the bead, since the frictional force is small due to the unevenness of the bead.
また、横割れ面は左右に傾いている場合がある
が、かかる場合にはレール３をビード２に対して
左右対象に置かずに、割れ面の傾きに応じてマグ
ネツト４を支点にして容易に回転させることがで
きる。 In addition, the horizontal crack surface may be inclined to the left or right, but in such a case, the rail 3 should not be placed symmetrically with respect to the bead 2, but the magnet 4 can be easily used as a fulcrum according to the inclination of the crack surface. It can be rotated.
また指針７は両探触子１，１′のセンターライ
ンの交点を指示するためのものであり、第１図に
おけるごとく該交点は欠陥位置に相当するもので
ある。 Further, the pointer 7 is used to indicate the intersection of the center lines of both probes 1, 1', and as shown in FIG. 1, this intersection corresponds to the defect position.
次に本考案治具の使用法であるが、まず、マグ
ネツト４を探傷すべき溶接ビード上に吸着させ、
高さ調整ネジ８によりレールがほぼ試験片表面と
平行になるように調整し、連結具６を張らせた状
態で左右の探触子１，１′を試験材表面に接触さ
せ、同時にガイドレール３の内側に平行に摺動さ
せつつ交互に前後走査させる。 Next, how to use the jig of the present invention. First, attract the magnet 4 onto the weld bead to be detected,
Adjust the rail so that it is almost parallel to the surface of the test piece using the height adjustment screw 8, and bring the left and right probes 1, 1' into contact with the surface of the test piece with the connector 6 tensioned, and simultaneously move the guide rail 3 and alternately scan back and forth while sliding parallel to the inside of the screen.
超音波探傷では試験片表面と探触子の接触状況
が不安定であれば感度が変動するので、探傷状況
を安定に保つことが重要であるが、安定した接触
状況を維持させるには、バネ等を用いて接触させ
る自動探傷等の場合と比較して、微妙なコントロ
ールが可能な手動探傷が最良である。 In ultrasonic flaw detection, if the contact situation between the test piece surface and the probe is unstable, the sensitivity will fluctuate, so it is important to keep the flaw detection situation stable. Manual flaw detection is best as it allows for finer control compared to automatic flaw detection, which uses tools such as automatic flaw detection.
本考案の極めて簡便な治具を補助的に用いるこ
とによつて、またぎ走査において信頼度の高い手
動走査が可能である。 By supplementarily using the extremely simple jig of the present invention, highly reliable manual scanning is possible in straddle scanning.
このように本考案による走査治具を用いればあ
らゆる方向の突合せ溶接部の横割れを極めて簡単
に、しかも能率よく探傷することができる。 As described above, by using the scanning jig according to the present invention, transverse cracks in butt welds in all directions can be detected extremely easily and efficiently.
第１図はまたぎ走査の原理図、第２図は第１図
のＡ−Ａ断面図、第３図は第１図のＢ−Ｂ断面
図、第４図は本考案実施例治具の平面図、第５図
は第４図のＣ−Ｃ断面図である。
１，１′：斜角探触子、２：溶接ビード、３：
ガイドレール、４：マグネツト、５：探触子ハウ
ジング、６：連結具、７：指針、８：高さ調整ネ
ジ、９：横割れ欠陥。
Fig. 1 is a diagram of the principle of cross-scanning, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a sectional view taken along line B-B in Fig. 1, and Fig. 4 is a plan view of a jig according to an embodiment of the present invention. 5 is a sectional view taken along the line CC in FIG. 4. 1, 1': Bevel probe, 2: Weld bead, 3:
Guide rail, 4: Magnet, 5: Probe housing, 6: Connector, 7: Pointer, 8: Height adjustment screw, 9: Lateral crack defect.
Claims (1)
有する２本のガイドレールに２個の斜角探触子を
摺動自在に設けると共に、該レールの交点に固定
用マグネツトを備えかつ、前記両斜角探触子が前
記レール交点近傍を経由する可撓性連結具で連結
されていることを特徴とする超音波探傷走査治
具。 Two bevel probes are slidably provided on two guide rails having intersection points whose ends are pivotably supported at an appropriate angle, and a fixing magnet is provided at the intersection point of the rails. An ultrasonic flaw detection scanning jig, characterized in that both oblique probes are connected by a flexible connector passing through the vicinity of the rail intersection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15114780U JPS6239323Y2 (en) | 1980-10-24 | 1980-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15114780U JPS6239323Y2 (en) | 1980-10-24 | 1980-10-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5773655U JPS5773655U (en) | 1982-05-07 |
| JPS6239323Y2 true JPS6239323Y2 (en) | 1987-10-07 |
Family
ID=29510493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15114780U Expired JPS6239323Y2 (en) | 1980-10-24 | 1980-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6239323Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61105460A (en) * | 1984-10-30 | 1986-05-23 | Tokyo Gas Co Ltd | Ultrasonic flaw detecting method and its probe |
| JP2016114465A (en) * | 2014-12-15 | 2016-06-23 | 東京瓦斯株式会社 | Transversal crack detection device |
-
1980
- 1980-10-24 JP JP15114780U patent/JPS6239323Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5773655U (en) | 1982-05-07 |
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