JPS6227878Y2 - - Google Patents
Info
- Publication number
- JPS6227878Y2 JPS6227878Y2 JP1985160542U JP16054285U JPS6227878Y2 JP S6227878 Y2 JPS6227878 Y2 JP S6227878Y2 JP 1985160542 U JP1985160542 U JP 1985160542U JP 16054285 U JP16054285 U JP 16054285U JP S6227878 Y2 JPS6227878 Y2 JP S6227878Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- probe
- cylindrical member
- opening
- axle
- 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 42
- 238000013459 approach Methods 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 21
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000000034 method Methods 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】
本考案は中空車軸等筒体の超音波探傷をその内
周面側から行うことを可能とする全く新規な探傷
機を提案したものである。鉄道車輌の車軸は定期
的に点検して疲労疵発生の有無等を調べる必要が
ある。このために車輌端部に組付けた軸受装置が
取外されてこの部分の周面又は端面から超音波を
入射して探傷が行われるが、車輪を圧入したまま
ではこの圧入部に発生した疲労疵、いわゆるフレ
コロ疵を探知し得ない。すなわちフレコロ疵から
の疵エコーと、圧入部界面からの圧入エコーとの
識別が極めて困難なためである。従つて、車軸の
圧入部は車輪を圧脱してから磁粉探傷及び浸透探
傷を行つているのが実情である。[Detailed Description of the Invention] The present invention proposes a completely new flaw detector that enables ultrasonic flaw detection of a cylindrical body such as a hollow axle from its inner peripheral surface. It is necessary to periodically inspect the axles of railway vehicles to check for fatigue defects. For this purpose, the bearing device assembled at the end of the vehicle is removed and flaw detection is performed by injecting ultrasonic waves from the circumferential surface or end surface of this part, but if the wheel is still press-fitted, fatigue may occur in this press-fit part. It is not possible to detect flaws, so-called flexo flaws. That is, this is because it is extremely difficult to distinguish between flaw echoes from flexo flaws and press-fit echoes from the press-fit part interface. Therefore, the actual situation is that the press-fitted part of the axle is subjected to magnetic particle flaw detection and penetrant flaw detection after the wheel is depressurized.
ところで車輌軽量化のために近時、中空車軸の
採用が検討されている。中空車軸は文字通り軸心
部に中空部を有しているのでその内周面からの超
音波探傷が可能な筈であり、内周面からの探傷を
行うこととすると車輪を車軸に圧入したままでこ
の圧入部の探傷も可能である。 Incidentally, in order to reduce the weight of vehicles, the use of hollow axles has recently been considered. Since a hollow axle literally has a hollow part at the center of the shaft, it should be possible to perform ultrasonic flaw detection from the inner circumferential surface of the axle. It is also possible to detect flaws in this press-fitted part.
本考案は斯かる技術的背景の下になされたもの
であつて、探触子に傘に取付けた如き構造とする
ことにより、端部が細径となつた中空部内への挿
通が容易であり、また探触子を筒内面に押圧する
操作が筒外から手動で容易に行え、更に芯出しが
簡単な構造で可能であり、しかも十分な接触圧で
探触子を内周面に接触せしめて音響的結合にも優
れた超音波探傷機を提供することを目的とし、以
下に本考案をその実施例を示す図面に基づいて詳
述する。 The present invention was developed against this technical background, and by making the probe have a structure similar to that attached to an umbrella, it is easy to insert the probe into a hollow part whose end has a small diameter. In addition, the operation of pressing the probe against the inner surface of the cylinder can be easily performed manually from outside the cylinder, and centering is possible with a simple structure, and the probe can be brought into contact with the inner circumferential surface with sufficient contact pressure. DESCRIPTION OF THE PREFERRED EMBODIMENTS An object of the present invention is to provide an ultrasonic flaw detector with excellent acoustic coupling.
第１図は本考案に係る超音波探傷機（以下本案
品という）を中空車軸Ｓ内に挿通した状態を略示
している。車軸Ｓは車輪Ｗを圧入すべき輪座S1の
部分の外径が最も大となつており、輪座S1より中
央部側はそれよりも僅かに細くなつている。一
方、輪座S1より端部側は順次縮径されており、図
示しない軸受装置のちりよけ座S2、軸箱の装着部
分S3及び前蓋被嵌部分S4が形成されている。一
方、内径、すなわち中空部SHの直径は端部が僅
かに大径となつている外は端部からS3部分迄は小
径となつており、S2部分から中央部へ向けてゆる
やかに拡径され輪座S1部分から中央部へは一定の
直径となつている。 FIG. 1 schematically shows a state in which an ultrasonic flaw detector according to the present invention (hereinafter referred to as the present product) is inserted into a hollow axle S. The axle S has the largest outer diameter at the wheel seat S1 into which the wheel W is to be press-fitted, and is slightly thinner at the center of the wheel seat S1 . On the other hand, the diameter of the end portion is gradually reduced from the ring seat S 1 , and a dust guard seat S 2 of the bearing device (not shown), an axle box mounting portion S 3 , and a front cover fitting portion S 4 are formed. . On the other hand, the inner diameter, that is, the diameter of the hollow part SH, is slightly larger at the end, smaller on the outside from the end to the S3 part, and gradually expands from the S2 part to the center. The diameter is constant from the ring seat S1 to the center.
さて本案品をその全体を略示する第２図に基づ
いて説明すると、被検物たる車軸Ｓ内への挿通が
可能な外径を有する長尺の外筒１、この外筒１の
軸長方向へ摺動自在に外筒１内に収納された外筒
１よりも長尺の内筒２、外筒１の先端部に設けた
フランジ１１の３等配の位置に夫々の基端を枢支
した３本の取付アーム３、探傷面を外向き、すな
わち車軸Ｓ内周面に対向させ得るように、取付け
アーム３夫々の先端に各１個枢支された計３個の
探触子４及び夫々の基端が外筒１の先端より突出
している内筒２の先端部の３等配の位置に枢支さ
れ、また夫々の先端が各対応する取付アーム３の
中途に枢支された３本の開閉アーム５等からなつ
ている。このような構成により、外筒１に対して
内筒２をその基端（又は先端）方向へ移動させる
と、開閉アーム５及び取付アーム３は恰も傘の骨
の如く作用し探触子４を枢支した取付アーム３の
先端部が遠心（又は求心）移動し、これに伴つて
３つの探触子は相互に離反（又は接近）する動作
を行う。 Now, the present product will be explained with reference to FIG. 2, which schematically shows the whole of the product. The base ends of the inner cylinder 2, which is longer than the outer cylinder 1, and the flange 11 provided at the distal end of the outer cylinder 1 are pivoted at three equal positions. A total of three probes 4 are supported, one each at the tip of each of the mounting arms 3, so that the flaw detection surface faces outward, that is, facing the inner circumferential surface of the axle S. and the respective base ends were pivoted at three equally spaced positions on the distal end of the inner cylinder 2 protruding from the distal end of the outer cylinder 1, and the respective distal ends were pivoted at the midpoints of the corresponding mounting arms 3. It consists of three opening/closing arms 5, etc. With this configuration, when the inner tube 2 is moved toward the proximal end (or tip) of the outer tube 1, the opening/closing arm 5 and the mounting arm 3 act like the bones of an umbrella and move the probe 4. The distal end of the pivoted mounting arm 3 moves centrifugally (or centripetally), and in conjunction with this, the three probes move away from (or approach) each other.
以下各部につき詳述する。外筒１には複数のリ
ング１２がルーズフイツト状態で外嵌、つまり遊
嵌されていて、その外径は車軸ＳのS3部分の内径
より僅かに短い寸法に定められており、本案品を
車軸内に挿入した場合にはS3部分又はその内径と
等しい細径部分に位置せしめて本案品の芯出し、
すなわち本案品と車軸とを同心的に位置させる機
能を果たすようにしている。１３は外筒１の基端
部近傍に外嵌した補強管１４に螺着された２本の
軸体よりなる回転ハンドルであつて、この回転ハ
ンドル１３を回転させることにより外筒１及びこ
れに取付アーム３を介しして連結された探触子４
を軸心回転させて探触子４による車軸の周方向の
探傷操作を行わせるようにしてある。 Each part will be explained in detail below. A plurality of rings 12 are loosely fitted, that is, loosely fitted, into the outer cylinder 1, and their outer diameter is set to be slightly shorter than the inner diameter of the S3 portion of the axle S. When inserted into the inner diameter, center the product by positioning it at the S 3 part or the narrow diameter part equal to the inner diameter of the S 3 part,
In other words, it functions to position the product and the axle concentrically. Reference numeral 13 denotes a rotary handle consisting of two shafts screwed onto a reinforcing tube 14 fitted around the base end of the outer cylinder 1. By rotating this rotary handle 13, the outer cylinder 1 and the Probe 4 connected via mounting arm 3
The probe 4 is rotated about its axis to allow the probe 4 to detect flaws in the circumferential direction of the axle.
外筒１の基端部から突出した内筒２の基端部に
は厚板状の支持ブロツク２１が外嵌固着されてお
り、内筒２の外周面から適長離隔したこの支持ブ
ロツクの縁部にはネジ穴が形成されており、この
ネジ穴には適長の送りネジ２２が螺合挿通されて
いる。送りネジ２２の基端部にはこれを回転させ
るための開閉ハンドル２３が嵌着固定されてお
り、送りネジ２２の先端部はこの回転自在に補強
管１４の適処に係合させてある。補強管１４は外
筒１の基端部に固着されている。支持ブロツク２
１から先端方向へ適長離隔した内筒周面には移動
ブロツク２４が固着されている。移動ブロツク２
４は外筒１及び補強管１４の基端部に切欠形成し
た溝１４′内に外筒１の軸長方向への移動が可能
である反面、周方向への移動が不可能であるよう
に係入されており、溝１４′の長手方向周縁には
目盛板１５が貼着されており、これに対向する移
動ブロツク２４の側面には目盛溝２４ａが刻設さ
れている。斯かる構造により開閉ハンドル２３の
一方向（又は他方向）への回転を行うと、支持ブ
ロツク２１、従つてまた内筒２が外筒１に対して
その基端方向（又は先端方向）へ移動し、その移
動量が目盛溝２４ａの目盛板１５に対する位置に
より読取られるようになつている。 A thick plate-shaped support block 21 is externally fitted and fixed to the base end of the inner cylinder 2 that protrudes from the base end of the outer cylinder 1, and the edge of this support block is spaced an appropriate distance from the outer peripheral surface of the inner cylinder 2. A screw hole is formed in the portion, and a feed screw 22 of an appropriate length is screwed and inserted into this screw hole. An opening/closing handle 23 for rotating the feed screw 22 is fitted and fixed to the base end of the feed screw 22, and the tip of the feed screw 22 is engaged with an appropriate portion of the reinforcing tube 14 so as to be rotatable. The reinforcing tube 14 is fixed to the base end of the outer cylinder 1. Support block 2
A moving block 24 is fixed to the inner cylinder circumferential surface which is spaced an appropriate distance from the moving block 1 toward the distal end. moving block 2
4 is a groove 14' cut out in the proximal end of the outer cylinder 1 and the reinforcing tube 14 so that the outer cylinder 1 can be moved in the axial direction, but cannot be moved in the circumferential direction. A scale plate 15 is attached to the longitudinal periphery of the groove 14', and a scale groove 24a is carved on the side surface of the moving block 24 opposite to this. With such a structure, when the opening/closing handle 23 is rotated in one direction (or the other direction), the support block 21 and therefore the inner cylinder 2 move toward the proximal end (or toward the distal end) with respect to the outer cylinder 1. However, the amount of movement can be read by the position of the scale groove 24a with respect to the scale plate 15.
一方、第３図に示すように内筒２の外筒１の先
端部から突出した先端部には円筒状の取付シリン
ダ２５が外嵌固定されており、３本の開閉アーム
５を夫々に取付けるために３等配で形成した軸長
方向に延びる３つの溝２５ａの位置は前記フラン
ジ１１の先端面に３等配で形成した３個の突子１
１ａと周方向の位置を一致させてある。各溝２５
ａにはその基端部を位置せしめた開閉アーム５が
各１本枢支されている。各溝２５ａ間に形成した
小溝２５ｂは開閉アーム５の支軸挿通のために設
けたものである。 On the other hand, as shown in FIG. 3, a cylindrical mounting cylinder 25 is externally fitted and fixed to the tip of the inner tube 2 protruding from the tip of the outer tube 1, and three opening/closing arms 5 are attached to each of the cylinders 25. Therefore, the positions of the three grooves 25a extending in the axial direction formed at three equal intervals are the same as the three protrusions 1 formed at three equal intervals on the tip surface of the flange 11.
The position in the circumferential direction is made to match that of 1a. Each groove 25
One opening/closing arm 5 with its base end positioned is pivotally supported on each of the opening/closing arms 5a. The small grooves 25b formed between the respective grooves 25a are provided for the support shaft of the opening/closing arm 5 to be inserted therethrough.
取付アーム３は横長コ字状の主枠部３１と、探
触子４を回動可能に両側から支持するジンバル部
３２とからなつている。主枠部３１のコの字の開
口端に相当する基端部は突子１１ａに枢支されて
おり、主枠部３１の中途には開閉アーム５の先端
部が主枠部３１の枠内に挿入するようにして枢支
されている。ジンバル部３２はその基端部を主枠
部３１の先端面に固着するように取付けられてい
る。そしてこのジンバル部３２の先端部には図示
しないジンバル軸まわりにある程度の回動が可能
となるように探触子４が枢支されている。探触子
４は振動子を内蔵する探触子本体４１と、その表
面を被覆して被検物との摺接を行わせるシユー４
２とからなり、両者は音響的結合を確実にするた
めに両者間にシリコングリス等を介在させて密着
的に重合締結されている。 The mounting arm 3 is composed of a horizontally long U-shaped main frame part 31 and a gimbal part 32 that rotatably supports the probe 4 from both sides. The base end portion of the main frame portion 31 corresponding to the U-shaped opening end is pivotally supported by the protrusion 11a, and the tip portion of the opening/closing arm 5 is located in the middle of the main frame portion 31 within the frame of the main frame portion 31. It is pivoted so that it can be inserted into. The gimbal portion 32 is attached such that its base end portion is fixed to the distal end surface of the main frame portion 31. The probe 4 is pivotally supported at the tip of the gimbal section 32 so as to be able to rotate to a certain extent around a gimbal axis (not shown). The probe 4 includes a probe body 41 containing a built-in vibrator, and a shoe 4 that covers the surface of the probe body 41 and makes sliding contact with the test object.
2, which are closely superposed and fastened with silicone grease or the like interposed between them to ensure acoustic coupling.
探触子本体４１の先端部から超音波発受信のた
めのリード線４３が引出されており、その先端の
コネクタ４３ａを内筒２内を挿通させたケーブル
４４の先端部に設けたコネクタ４４ａに接続して
いる。そしてケーブル４４の基端部は内筒２の基
端開口から延出させ、該基端部に取付けたコネク
タ４４ｂを図示しない超音波探傷機本体の送受信
端子に接続してある。 A lead wire 43 for transmitting and receiving ultrasonic waves is drawn out from the tip of the probe body 41, and a connector 43a at the tip is connected to a connector 44a provided at the tip of a cable 44 inserted through the inner cylinder 2. Connected. The base end of the cable 44 extends from the base opening of the inner cylinder 2, and a connector 44b attached to the base end is connected to a transmitting/receiving terminal of the ultrasonic flaw detector body (not shown).
開閉アーム５は第２図に略示するようにスプリ
ング５１を内蔵した基端側のシリンダ部５２と先
端側のロツド部５３とからなり、スプリング５１
で両者を離反させるように付勢している。 As schematically shown in FIG. 2, the opening/closing arm 5 consists of a cylinder part 52 on the proximal end containing a spring 51 and a rod part 53 on the distal end.
This forces them to separate from each other.
なお第３図には取付アーム３、探触子４及び開
閉アーム５を各１組しか描いていないが３等配の
位置に各１組設けられていることは前述のとおり
である。そして内筒２の外筒１に対する移動可能
量、取付アーム３、開閉アーム５の長さ、両者の
枢支位置等は３つの探触子４の遠心的離反を行わ
せる程度に応じて選定される。 Although FIG. 3 depicts only one set each of the mounting arm 3, probe 4, and opening/closing arm 5, one set each is provided at three equally spaced positions, as described above. The movable amount of the inner tube 2 relative to the outer tube 1, the lengths of the mounting arm 3 and the opening/closing arm 5, the pivot positions of both, etc. are selected depending on the degree to which the three probes 4 are centrifugally separated. Ru.
さて叙上の如く構成された本案品は次のように
して使用される。すなわち予め開閉ハンドル２３
を所定方向に回転操作し内筒２を外筒１に対して
その基端側方へ移動させておく。そうすると開閉
アーム５は基端部を中心にジンバル部３２方向へ
倒れるように回動し、３つの探触子４は求心接近
した状態になる。そしてリング１２をフランジ１
１に比較的接近させた状態で本案品を探触子４側
から車軸Ｓ内に挿入し、探触子４が輪座S1の内周
面に対向する位置で挿入を停止する。リング１２
の働きにより内筒２、外筒１は車軸Ｓの輪座S1の
内周面と略同心的となり、略芯出しされたことに
なる。しかる後に開閉ハンドル２３を逆方向に回
転させ内筒２を外筒１に対してその先端側方へ移
動させる。そうすると開閉アーム４は起立回動
し、各取付アーム３を押し拡く。これに伴つて３
つの探触子４は遠心離反し、シユー４２が車軸Ｓ
の内周面に当接し、これによつて完全な芯出しが
行われたことになる。 The product constructed as described above is used in the following manner. That is, the handle 23 can be opened and closed in advance.
is rotated in a predetermined direction to move the inner cylinder 2 toward the proximal side of the outer cylinder 1. Then, the opening/closing arm 5 rotates around the base end so as to fall down toward the gimbal section 32, and the three probes 4 become centripetally approached. and the ring 12 to the flange 1
1, the product is inserted into the axle S from the probe 4 side, and the insertion is stopped at a position where the probe 4 faces the inner peripheral surface of the ring seat S1 . ring 12
Due to this function, the inner cylinder 2 and the outer cylinder 1 become approximately concentric with the inner circumferential surface of the wheel seat S1 of the axle S, and are approximately centered. Thereafter, the opening/closing handle 23 is rotated in the opposite direction to move the inner cylinder 2 to the side of the distal end with respect to the outer cylinder 1. Then, the opening/closing arm 4 stands up and rotates, pushing each mounting arm 3 apart. Along with this, 3
The two probes 4 are centrifugally separated, and the shoe 42 is attached to the axle S.
This means that complete centering has been achieved.
操作者はシユー４２が車輪内周面に接したこと
を開閉ハンドル２３の回転抵抗で感知し得るが、
目盛溝２４ａの目盛板１５に対する位置をガイド
指標として、探触子４の開き程度、すなわち遠心
離反量を知ることができる。 The operator can sense that the shoe 42 is in contact with the inner peripheral surface of the wheel by the rotational resistance of the opening/closing handle 23;
Using the position of the scale groove 24a with respect to the scale plate 15 as a guide index, the degree of opening of the probe 4, that is, the amount of centrifugal separation can be determined.
外筒１は中空部SHの細径部分にてリング１２
によて支持されており、車軸Ｓと内外筒とは同心
的になつており、また開閉アーム５中にはスプリ
ン５１を介在させてあるので、３つの探触子４は
適当な均一圧力で車軸内周面に圧接されることに
なる。なおシユー４２の表面にはシリコングリス
等の接触媒体を塗着しておくとよい。 The outer cylinder 1 has a ring 12 at the narrow diameter part of the hollow part SH.
The axle S and the inner and outer cylinders are concentric, and a spring 51 is interposed in the opening/closing arm 5, so the three probes 4 are supported by an appropriate uniform pressure. It comes into pressure contact with the inner peripheral surface of the axle. Note that it is preferable to apply a contact medium such as silicone grease to the surface of the shoe 42.
このようにした上で超音波探傷機体本体を起動
するとケーブル４４、リード線４３を経て信号の
送受が行われ、探触子本体４１から発せられた超
音波は車軸Ｓ内に入射され、その外周面又は疵部
からの反射波が探触子本体４１によつて捉えら
れ、その波形が超音波探傷機本体に表示されるこ
とになる。なお、探傷モードは探触子本体４１内
における振動子の配設角度によつて定まるが、斜
角探傷又は表面波探傷が可能である。 When the main body of the ultrasonic flaw detection device is started in this manner, signals are sent and received via the cable 44 and the lead wire 43, and the ultrasonic waves emitted from the probe main body 41 are input into the axle S and the outer periphery thereof. The reflected wave from the surface or flaw is captured by the probe body 41, and its waveform is displayed on the ultrasonic flaw detector body. Note that the flaw detection mode is determined by the arrangement angle of the transducer within the probe main body 41, but oblique flaw detection or surface wave flaw detection is possible.
なお探傷走査は回転ハンドル１３を回転するこ
とにより周方向の走査が、また外筒１自体に押込
むことにより軸方向の走査が可能になる。このよ
うな方法によつて探触子４を車軸内周面に摺接さ
せて移動することとしても、シユー４２の外面が
曲面状になつており、また開閉アーム５にはスプ
リング５１を内蔵しているので円滑に移動させ得
る。なお各３本のケーブル４４、リード線３３の
絡まりを防止するために、外筒１の回転は１回転
毎に反転させるのがよい。 Note that flaw detection scanning can be performed in the circumferential direction by rotating the rotary handle 13, and in the axial direction by pushing it into the outer cylinder 1 itself. Even if the probe 4 is moved in sliding contact with the inner peripheral surface of the axle by such a method, the outer surface of the shoe 42 is curved, and the opening/closing arm 5 has a built-in spring 51. It can be moved smoothly. Note that in order to prevent the three cables 44 and lead wires 33 from becoming entangled, the rotation of the outer cylinder 1 is preferably reversed every rotation.
このようにして車軸Ｓの挿入側端部から他端部
に向けての探傷を行つた後は開閉ハンドル２３を
操作して３つの探触子４を若干求心接近させて車
軸内周面に対する圧接を解除して本案品を車軸か
ら引き出す。この間中空部SHの細径部にさしか
かつた際は徐々に引出しながら探触子４を求心接
近させる。これにより探触子が裏返つて車軸内に
係留される現象を回避できる。 After performing flaw detection from the insertion side end of the axle S to the other end in this way, operate the opening/closing handle 23 to move the three probes 4 slightly centripetally toward each other and press them against the inner circumferential surface of the axle. Release the button and pull out the product from the axle. During this time, when the probe 4 reaches the narrow diameter part of the hollow part SH, it is gradually pulled out and the probe 4 approaches centripetally. This makes it possible to avoid a phenomenon in which the probe is turned over and moored within the axle.
第４図は外径210mm、内径120mmの内外面に深さ
0.2mmの円周方向に延びる人工疵を付した試料に
ついて本案品を使用して探傷を行つた場合の探傷
波形を示したものである。イ，ロは車輪圧入なし
の状態で前者は外面疵を、後者は内面疵を夫々検
出させた場合のもの、またハ，ニは車輪圧入状態
で、前者は圧入部の外面疵を、後者は圧入部の内
面疵を検出させた場合のものを示している。これ
らの図中ａは圧入エコーを、ｂは疵エコーを、ま
たｃは段エコー（輪座S1の段部より得られるエコ
ー）を夫々示している。この図から明らかな如く
圧入エコーａと疵エコーｂとはそのレベルに明確
な差があり、両者の識別は容易に行える。 Figure 4 shows the depth on the inner and outer surfaces with an outer diameter of 210 mm and an inner diameter of 120 mm.
This figure shows the flaw detection waveform when flaw detection was performed using this product on a sample with an artificial flaw extending in the circumferential direction of 0.2 mm. A and B are when the wheel is not press-fitted, and the former shows external flaws, and the latter is when internal flaws are detected, and C and D are when the wheel is press-fitted. This figure shows the case where internal flaws in the press-fitted part are detected. In these figures, a indicates a press-fit echo, b indicates a flaw echo, and c indicates a step echo (an echo obtained from the stepped portion of the ring seat S1 ). As is clear from this figure, there is a clear difference in level between the press-fit echo a and the flaw echo b, and the two can be easily distinguished.
なお第４図に結果を示した探傷に際しては外面
に付した人工疵の検出については斜角探傷を可能
とする探触子を、また内面に付した人工疵の検出
については表面波による探傷を可能とする探触子
を用いている。 For the flaw detection whose results are shown in Figure 4, a probe capable of angle-angle flaw detection was used to detect artificial flaws on the outer surface, and a surface wave flaw detection was used to detect artificial flaws on the inner surface. We use a probe that allows this.
以上詳述した如く本考案に係る探傷機は筒部材
内にこれよりも長い筒状のスライド部材を軸長方
向に移動自在に配設し、筒部材とスライド部材と
の手動による相対移動手段を両者の端部間に設け
たので全体を小型化することが可能となり、小径
の被検筒体に対してもその操作が容易で、迅速に
探傷を行うことが出来る。そして複数のリング１
２の存在により本案装置の被検筒体に対する芯出
しを簡単に行え、また該リング１２は筒部材（外
筒１）に対し遊嵌してあるので、探傷位置に応じ
てこれを軸長方向に移動させることができ探傷位
置によらず安定且つ容易に芯出しができる。また
各探触子のリード線はスライド部材内に挿通配置
することとしてあるから、小径の被検筒体を探傷
する場合においても被検筒体等との挿通による損
傷から保護出来て、経年的な使用が出来、しかも
信頼性も高いなど、本考案は優れた効果を奏する
ものである。 As detailed above, the flaw detector according to the present invention has a longer cylindrical slide member disposed within the cylindrical member so as to be movable in the axial direction, and a means for manual relative movement between the cylindrical member and the slide member. Since it is provided between the two ends, it is possible to downsize the entire body, and it is easy to operate even on small-diameter test cylinders, and flaw detection can be performed quickly. and multiple rings 1
2 makes it easy to center the device of the present invention with respect to the cylinder to be inspected, and since the ring 12 is loosely fitted to the cylinder member (outer cylinder 1), it can be adjusted in the axial direction according to the flaw detection position. This allows for stable and easy centering regardless of the flaw detection position. In addition, since the lead wires of each probe are inserted through the slide member, even when detecting small diameter test tubes, they can be protected from damage caused by insertion into the test tube, etc., and can be protected over time. The present invention has excellent effects, such as ease of use and high reliability.
図面は本考案の実施例に示すものであつて、第
１図は本案品を中空車軸内に挿入した状態を略示
する側面図、第２図は本案品の全体を略示する斜
視図、第３図はその先端部の一部の構造を示す斜
視図、第４図はイ，ロ，ハ，ニは本案品による探
傷結果を示す波形図である。
１……外筒、２……内筒、３……取付アーム、
４……探触子、５……開閉アーム。
The drawings show embodiments of the present invention, in which Figure 1 is a side view schematically showing the product inserted into a hollow axle, Figure 2 is a perspective view schematically showing the entire product. FIG. 3 is a perspective view showing the structure of a part of the tip, and FIG. 4 is a waveform diagram showing the flaw detection results of the present product. 1...Outer cylinder, 2...Inner cylinder, 3...Mounting arm,
4... Probe, 5... Opening/closing arm.
Claims (1)
を備えた超音波探傷機において、長尺の筒部材
と、該筒部材の軸長方向寸法よりも長い筒状をな
し、両端部を筒部材から僅かに突き出した状態で
筒部材内に軸長方向へ移動自在に挿通され内部に
前記探触子のリード線を挿通させたスライド部材
と、被検筒体内径より僅かに短い直径を有し、前
記筒部材の外側に遊嵌された複数の芯出し用リン
グと、各一端部が筒部材の被検筒体内側端部に枢
支された複数の取付アームと、被検筒体内に挿入
された場合に被検筒体の内周面に対向させるべく
各取付アーム夫々の他端部に枢支された探触子
と、各一端部がスライド部材の被検筒体内側端部
に、また各他端部が対応する取付アームの中途に
枢支された開閉アームと、スライド部材の被検筒
体外側端部にこれと軸方向を同一にして回転可能
に支持され、その一端を筒部材に回転可能に係合
してある送りネジとを具備し、送りネジの回転に
より筒部材とスライド部材とを相対移動させて各
探触子の遠心離反、求心接近を可能としたことを
特徴とする超音波探傷機。 In an ultrasonic flaw detector equipped with a probe that injects ultrasonic waves from the inner circumferential surface of a cylinder to be inspected, it includes a long cylinder member, a cylinder shape that is longer than the axial dimension of the cylinder member, and has both ends. a slide member that is inserted into the cylindrical member so as to be freely movable in the axial direction with its portion protruding slightly from the cylindrical member, and into which the lead wire of the probe is inserted; a plurality of centering rings having a diameter and loosely fitted on the outside of the cylindrical member; a plurality of mounting arms each having one end pivotally supported on an inner end of the cylindrical body to be inspected of the cylindrical member; A probe pivoted to the other end of each mounting arm so as to face the inner circumferential surface of the cylinder to be tested when inserted into the cylinder, and one end of each probe attached to the inside of the cylinder to be tested is a sliding member. an opening/closing arm pivotally supported at the end and in the middle of the mounting arm to which each other end corresponds; and a slide member rotatably supported in the same axial direction at the outer end of the test cylinder body; It is equipped with a feed screw whose one end is rotatably engaged with the cylindrical member, and by rotation of the feed screw, the cylindrical member and the slide member are moved relative to each other, allowing centrifugal separation and centripetal approach of each probe. This ultrasonic flaw detector is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985160542U JPS6227878Y2 (en) | 1985-10-18 | 1985-10-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985160542U JPS6227878Y2 (en) | 1985-10-18 | 1985-10-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6180454U JPS6180454U (en) | 1986-05-28 |
| JPS6227878Y2 true JPS6227878Y2 (en) | 1987-07-17 |
Family
ID=30718466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985160542U Expired JPS6227878Y2 (en) | 1985-10-18 | 1985-10-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6227878Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5350788A (en) * | 1976-10-19 | 1978-05-09 | Nippon Steel Corp | Holding mechanism for testing apparatus for tube inner part |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5552357Y2 (en) * | 1976-02-26 | 1980-12-05 |
-
1985
- 1985-10-18 JP JP1985160542U patent/JPS6227878Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5350788A (en) * | 1976-10-19 | 1978-05-09 | Nippon Steel Corp | Holding mechanism for testing apparatus for tube inner part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6180454U (en) | 1986-05-28 |
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