JP2003028838A - Method for preventing detection omission of edge flaw detector - Google Patents

Method for preventing detection omission of edge flaw detector

Info

Publication number
JP2003028838A
JP2003028838A JP2001209594A JP2001209594A JP2003028838A JP 2003028838 A JP2003028838 A JP 2003028838A JP 2001209594 A JP2001209594 A JP 2001209594A JP 2001209594 A JP2001209594 A JP 2001209594A JP 2003028838 A JP2003028838 A JP 2003028838A
Authority
JP
Japan
Prior art keywords
inspected
rotation
flaw detector
time
roller
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.)
Withdrawn
Application number
JP2001209594A
Other languages
Japanese (ja)
Inventor
Takanori Aota
隆則 青田
Original Assignee
Sanyo Special Steel Co Ltd
山陽特殊製鋼株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Special Steel Co Ltd, 山陽特殊製鋼株式会社 filed Critical Sanyo Special Steel Co Ltd
Priority to JP2001209594A priority Critical patent/JP2003028838A/en
Publication of JP2003028838A publication Critical patent/JP2003028838A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a method for preventing the detection omission of an edge flaw detector, grasping the rotary state of a material to be inspected by comparing the rotation of the material to be inspected with the rotation of the roller provided to the edge flaw detector or a set time. SOLUTION: The method for preventing the detection omission of the edge flaw detector is characterized in that the rotary state of the material to be inspected is grasped by detecting the rotation of the material to be inspected as the rotation of the roller provided to the edge flaw detector or characterized in that the rotary state of the material to be inspected is grasped by setting the rotation of the material to be inspected, that is, the rotation of the roller provided to the edge flaw detector to the rotary time corresponding to the outer diameter of the material to be inspected. Further, the method for preventing the detection omission of the edge flaw detector is characterized in that one material to be inspected is arbitrarily extracted beforehand to be rotated by the necessary prescribed number of rotations and the rotary time of the material to be inspected is stored and the stored rotary time is compared with an actual flaw detection time and, when the actual flaw detection time is shorter, an abnormal alarm is emitted.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【発明の属する技術分野】本発明は、端面探傷機検出も
れ防止方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end face flaw detector detection / leakage prevention method.
【0002】[0002]
【従来の技術およびその課題】従来、端面の探傷を手動
で行う場合には、図4に示すように、被検材1を作業者
が手で転がしながら端面探傷機2によって端面の探傷を
行うため、被検材が何回転したかは作業者の目による判
断によっていた。この場合、探傷本数が増えたり、作業
負担が大きい時などは特に作業者の判断ミスの可能性が
高くなり、被検材を1回転させない内に探傷を終了して
しまう可能性があった。この場合に1回転させない被検
材に欠陥があった場合には、その被検材の検出もれとな
り、端面割れ流出の原因となっていた。
2. Description of the Related Art Conventionally, in the case of manually performing flaw detection on an end face, as shown in FIG. 4, while an operator manually rolls the material to be inspected 1, the end face flaw detector 2 performs flaw detection on the end face. Therefore, the number of rotations of the test material depends on the judgment of the operator's eyes. In this case, especially when the number of flaws is increased or the work load is heavy, there is a high possibility that the operator may make a mistake in the decision, and the flaws may be terminated before the test material is rotated once. In this case, if there is a defect in the test material that is not rotated once, the test material will be missed, which causes the outflow of end face cracks.
【0003】[0003]
【課題を解決するための手段】上述したような問題を解
消するために、発明者らは鋭意開発を進めた結果、被検
材の回転を端面探傷機に設けたローラーの回転、ないし
は設定時間と比較して被検材の回転状況を把握する端面
探傷機検出もれ防止方法を提供する。その発明の要旨と
するところは、 (1)被検材の回転を端面探傷機に設けたローラーの回
転を検知することで被検材の回転状況を把握することを
特徴とする端面探傷機検出もれ防止方法。
In order to solve the above-mentioned problems, as a result of intensive development by the inventors, as a result, the rotation of a material to be inspected is rotated by a roller provided in an end face flaw detector, or a set time is set. An end face flaw detector detection leak prevention method for grasping the rotation state of a material to be inspected is provided. The gist of the invention is as follows: (1) End face flaw detector detection characterized by grasping the rotation state of the test substance by detecting the rotation of a roller provided in the end face flaw detector Leakage prevention method.
【0004】(2)被検材の回転を端面探傷機に設けた
ローラーの回転を被検材の外径に応じた回転時間に設定
し、該設定時間によって被検材の回転状況を把握するこ
とを特徴とする端面探傷機検出もれ防止方法。 (3)事前に被検材の1本を任意に抜取り必要規定の回
転数分回転させ、その回転時間を記憶させておき、該記
憶時間と実際の探傷時間を比較し、実際の探傷時間の方
が短いときは異常警報を発することを特徴とする端面探
傷機検出もれ防止方法にある。
(2) The rotation of the material to be inspected is set to the rotation time of the roller provided in the end face flaw detector according to the outer diameter of the material to be inspected, and the rotation status of the material to be inspected is grasped by the set time. An end face flaw detector detection leak prevention method characterized by the following. (3) One of the materials to be inspected is arbitrarily extracted and rotated in advance by the required number of rotations, the rotation time is stored, and the stored time and the actual flaw detection time are compared to determine the actual flaw detection time. There is an end-face flaw detector detection / leakage prevention method characterized in that an abnormal alarm is issued when the length is shorter.
【0005】[0005]
【発明の実施の形態】以下、本発明について図面に従っ
て詳細に説明する。図1は本発明に係る端面探傷機を示
す断面概略図である。図1(a)は全体断面図であり、
図1(b)は図1のA−A´断面図である。この図に示
すように、被検材1の回転を端面探傷機2にベアリング
を付けたローラー3を設け、被検材1に接触させる。被
検材1を回転させると、このローラー3が回転するの
で、その回転によって被検材1の外径が分かり、その被
検材1が規定回転したかどうかはローラー3の回転数を
エンコーダー等で検出し、管理することで検知すること
が出来る。
DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an end face flaw detector according to the present invention. FIG. 1A is an overall sectional view,
FIG. 1B is a sectional view taken along the line AA ′ of FIG. As shown in this drawing, the end surface flaw detector 2 is provided with a roller 3 having a bearing, and the end surface flaw detector 2 is brought into contact with the test material 1 for rotation. When the test material 1 is rotated, the roller 3 is rotated, so that the outer diameter of the test material 1 can be known by the rotation. It can be detected by managing with.
【0006】図2は本発明に係る端面探傷機でのローラ
ーとエンコーダーとの連結状態を示す図であり、図2
(a)は横断面、図2(b)は連結部の拡大図、図2
(c)は矢印方向からの断面図である。この図に示すよ
うに、被検材1の回転を端面探傷機2にベアリングを付
けたローラー3を設けて、被検材1に接触させるように
構成されている。被検材1を回転させると、このローラ
ー3が回転するので、その回転によって被検材1の外径
が分かる。この場合に、被検材1と接触しているローラ
ー3の片側とエンコーダー4をベルト5等で連結し、ロ
ーラー3の回転数をエンコーダー4にてカウントする。
このエンコーダー4の回転数の処理はカウンター6とC
PU7にて処理され、先に入力された外径や肉厚等で計
算された値との比較を行う。
FIG. 2 is a view showing a connection state between the roller and the encoder in the end face flaw detector according to the present invention.
2A is a cross-sectional view, FIG. 2B is an enlarged view of the connecting portion, and FIG.
(C) is a sectional view taken in the direction of the arrow. As shown in this figure, the end surface flaw detector 2 is provided with a roller 3 provided with a bearing so that the rotation of the test material 1 is brought into contact with the test material 1. When the test material 1 is rotated, the roller 3 is rotated, so that the outer diameter of the test material 1 can be known by the rotation. In this case, one side of the roller 3 in contact with the test material 1 and the encoder 4 are connected by the belt 5 or the like, and the rotation number of the roller 3 is counted by the encoder 4.
The processing of the rotation speed of this encoder 4 is performed by the counter 6 and C.
It is processed by the PU 7 and compared with the values calculated by the previously input outer diameter, wall thickness and the like.
【0007】図3は本発明に係る探傷開始時と探傷終了
時の端末信号を示す図である。この図に示すように、端
面探傷機を被検材に当てた時の探傷開始時と端面探傷機
を被検材から外した時の探傷終了時は、ガタツキの信号
として大きな信号が発生する。この信号を端末信号と言
う。この場合に探傷時間は、開始の端末信号から終了の
端末信号の間隔により分かる。また、被検材の外径が大
きい程転がす時間が掛り、被検材の単重は重い程転がす
時間がかかることを考慮した標準時間を設け、その標準
時間と探傷時間を比較して回転数を決定するものであ
る。さらには、被検材から任意に1本を抜出し、実際に
探傷を行ない、それを標準時間として使用する。このよ
うにして、上記同様に、端末信号で探傷時間が分かるた
め、その探傷時間と標準時間を比較するようにする。
FIG. 3 is a diagram showing terminal signals at the start and end of flaw detection according to the present invention. As shown in this figure, a large signal is generated as a rattling signal at the start of flaw detection when the end face flaw detector is applied to the test material and at the end of flaw detection when the end face flaw detector is removed from the test material. This signal is called a terminal signal. In this case, the flaw detection time can be known from the interval from the start terminal signal to the end terminal signal. The standard time is set in consideration that the larger the outer diameter of the material to be tested, the longer it takes to roll it, and the heavier the unit weight of the material to be tested, the longer it takes to roll it. Is to determine. Furthermore, one piece is arbitrarily extracted from the material to be inspected, a flaw is actually detected, and it is used as a standard time. In this way, similarly to the above, since the flaw detection time is known from the terminal signal, the flaw detection time is compared with the standard time.
【0008】[0008]
【実施例】以下、本発明について実施例によって具体的
に説明する。先ず、探傷前に被検材の外径を入力し、被
検材の回転検出用に取り付けたローラーの外径をR1
被検材の外径をR2 とすると、被検材が1回転するのに
必要なローラーの回転数はR2 /R1 で表されるが、実
際は被検材とローラー間の滑りが生じることや、1回転
以上させることが必要なので、それらのことを考慮し、
1.3×R2 /R1 回転以上ローラーが回転しない場合
は探傷時の回転不足とし、警報を出すようにするもので
ある。
EXAMPLES The present invention will be specifically described below with reference to examples. First, before the flaw detection, the outer diameter of the material to be inspected is input, and the outer diameter of the roller attached for detecting the rotation of the material to be inspected is R 1 ,
When the outer diameter of the test material and R 2, the rotation speed of the rollers required to rotate 1 test material is represented by R 2 / R 1, actually occurs slippage between the material being tested and the roller It is necessary to make one rotation or more, so consider those things,
If the roller does not rotate more than 1.3 × R 2 / R 1 rotation, the rotation is insufficient during flaw detection and an alarm is issued.
【0009】また、探傷前に被検材の外径を表1に示す
ように入力して置き、被検材の外径(mm)、単重(k
g/m)と探傷時間(S)の間には経験的に、以下のよ
うな式で近似できることが分かる。探傷時間(S)=
0.00898×外径+0.0342×(単重)0.7
の式で求められた探傷時間と端末信号間で分かる探傷時
間を比較して、後者の探傷時間の方が短い場合は探傷時
の回転不良とし、警報を出すようにするものである。
Before the flaw detection, the outer diameter of the material to be inspected is input and placed as shown in Table 1, and the outer diameter (mm) and unit weight (k) of the material to be inspected are set.
It is empirically understood that the following formula can be used to approximate between the flaw detection time (S) and the g / m). Detection time (S) =
0.00898 x outer diameter + 0.0342 x (single weight) 0.7 Compare the flaw detection time obtained by this formula with the flaw detection time found between terminal signals, and if the latter flaw detection time is shorter, rotate during flaw detection. It is considered to be defective and an alarm is issued.
【0010】[0010]
【表1】 [Table 1]
【0011】さらに、被検材から任意の1本を抜取り、
何回転したか確認するための目印を付け、実際に1.2
〜1.5回転程度回転させて探傷を行う。この場合も端
末信号間で探傷時間が分かるので、これを表2に示すよ
うに、標準探傷時間として記憶させておく。この標準探
傷時間と実際の探傷時間を比較して、探傷時間の方が短
い場合は探傷時の回転不良とし、警報を出すようにする
ものである。このように、被検材が規定回転数に達して
いない条件になった場合は、警報を出すようにする。こ
れによって、被検材の回転数の判断に関するバラツキが
少なくなるものである。
Further, an arbitrary one is taken out from the test material,
Add a mark to check how many turns, and actually check 1.2.
Rotate for about 1.5 rotations for flaw detection. In this case as well, since the flaw detection time is known between the terminal signals, this is stored as the standard flaw detection time as shown in Table 2. This standard flaw detection time is compared with the actual flaw detection time, and if the flaw detection time is shorter, it is determined that the rotation is defective at the time of flaw detection and an alarm is issued. In this way, if the condition under which the test material does not reach the specified number of revolutions is reached, an alarm is issued. This reduces variations in the determination of the rotation speed of the test material.
【0012】[0012]
【表2】 [Table 2]
【0013】[0013]
【発明の効果】以上述べたように、本発明による自動的
な被検材の回転数の判断によって端面割れ流出防止を図
ることが可能となり、品質上の保証精度が高く工業的に
極めて優れた効果を奏するものである。
As described above, according to the present invention, it is possible to prevent the end face crack from flowing out by automatically determining the number of revolutions of the material to be inspected, and the quality assurance accuracy is high and it is excellent in industry. It is effective.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明に係る端面探傷機を示す断面概略図であ
る。
FIG. 1 is a schematic sectional view showing an end face flaw detector according to the present invention.
【図2】本発明に係る端面探傷機でのローラーとエンコ
ーダーとの連結状態を示す図である。
FIG. 2 is a diagram showing a connected state of a roller and an encoder in the end face flaw detector according to the present invention.
【図3】本発明に係る探傷開始時と探傷終了時の端末信
号を示す図である。
FIG. 3 is a diagram showing terminal signals at the start of flaw detection and at the end of flaw detection according to the present invention.
【図4】従来の端面探傷機を示す断面概略図である。FIG. 4 is a schematic cross-sectional view showing a conventional end face flaw detector.
【符号の説明】[Explanation of symbols]
1 被検材 2 端面探傷機 3 ローラー 4 エンコーダー 5 ベルト 6 カウンター 7 CPU 1 Test material 2 Edge flaw detector 3 rollers 4 encoder 5 belt 6 counter 7 CPU

Claims (3)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 被検材の回転を端面探傷機に設けたロー
    ラーの回転を検知することで被検材の回転状況を把握す
    ることを特徴とする端面探傷機検出もれ防止方法。
    1. A method for preventing detection flaws of an end face flaw detector, comprising detecting the rotation of a roller provided in an end face flaw detector to detect the rotation state of the test substance.
  2. 【請求項2】 被検材の回転を端面探傷機に設けたロー
    ラーの回転を被検材の外径に応じた回転時間に設定し、
    該設定時間によって被検材の回転状況を把握することを
    特徴とする端面探傷機検出もれ防止方法。
    2. The rotation of the material to be inspected is set to the rotation time of the roller provided in the end face flaw detector according to the outer diameter of the material to be inspected,
    A method for preventing omission of detection of an end-face flaw detector, which comprises grasping a rotation state of a material to be inspected according to the set time.
  3. 【請求項3】 事前に被検材の1本を任意に抜取り必要
    規定の回転数分回転させ、その回転時間を記憶させてお
    き、該記憶時間と実際の探傷時間を比較し、実際の探傷
    時間の方が短いときは異常警報を発することを特徴とす
    る端面探傷機検出もれ防止方法。
    3. One of the materials to be inspected is arbitrarily extracted in advance and rotated for a required number of rotations in advance, the rotation time is stored, and the stored time is compared with the actual flaw detection time. When the time is shorter, an abnormal alarm is issued, which is a method for preventing detection flaws on the end face flaw detector.
JP2001209594A 2001-07-10 2001-07-10 Method for preventing detection omission of edge flaw detector Withdrawn JP2003028838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001209594A JP2003028838A (en) 2001-07-10 2001-07-10 Method for preventing detection omission of edge flaw detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001209594A JP2003028838A (en) 2001-07-10 2001-07-10 Method for preventing detection omission of edge flaw detector

Publications (1)

Publication Number Publication Date
JP2003028838A true JP2003028838A (en) 2003-01-29

Family

ID=19045223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001209594A Withdrawn JP2003028838A (en) 2001-07-10 2001-07-10 Method for preventing detection omission of edge flaw detector

Country Status (1)

Country Link
JP (1) JP2003028838A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454350A (en) * 2013-09-13 2013-12-18 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454350A (en) * 2013-09-13 2013-12-18 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline
CN103454350B (en) * 2013-09-13 2015-06-24 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline

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Effective date: 20081007