JPS62239007A - Quality deciding method for weld zone - Google Patents
Quality deciding method for weld zoneInfo
- Publication number
- JPS62239007A JPS62239007A JP8220386A JP8220386A JPS62239007A JP S62239007 A JPS62239007 A JP S62239007A JP 8220386 A JP8220386 A JP 8220386A JP 8220386 A JP8220386 A JP 8220386A JP S62239007 A JPS62239007 A JP S62239007A
- Authority
- JP
- Japan
- Prior art keywords
- echo
- tube
- reflected
- weld zone
- welding
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 238000003466 welding Methods 0.000 claims abstract description 31
- 238000002592 echocardiography Methods 0.000 claims abstract description 7
- 230000035515 penetration Effects 0.000 claims description 20
- 239000010953 base metal Substances 0.000 claims 1
- 239000000523 sample Substances 0.000 abstract description 12
- 230000007547 defect Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000005253 cladding Methods 0.000 description 38
- 238000010586 diagram Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Landscapes
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は溶接部の良否判定法に係り、特に超音波を利用
して溶接の良否を判定する溶接部の良否判定法に関する
。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a method for determining the quality of a weld, and particularly to a method for determining the quality of a weld using ultrasonic waves. Regarding.
（従来の技術）
一般に核燃料棒においては、第８図に示づ−ように、端
栓１を被覆管２にはめ込んだ後に、端栓１と被覆管２の
接合面を全周にわたって溶接している。(Prior Art) In general, in nuclear fuel rods, as shown in Fig. 8, after fitting the end plug 1 into the cladding tube 2, the joint surfaces of the end plug 1 and the cladding tube 2 are welded over the entire circumference. There is.
ところで、上述の如き溶接部の良否判定を行なう場合、
超音波を溶接部に斜めに入射し、被覆管２と端栓１の継
ぎ目の溶残し部分から反射する超音波を検出して溶造不
良を検出する斜角探傷法が採用されている。すなわち、
第９図（Ａ＞に示すように入熱不足によって溶接部が表
面近傍部のみに形成されている場合には、超音波探傷器
（図示省略）の超音波探触子２２からの超音波を溶接部
３に斜め方向から入射すると、この超音波が溶接部３を
通過し、端栓１と被覆管２の接合面で反射する。By the way, when determining the quality of the welded part as described above,
An oblique flaw detection method is used in which an ultrasonic wave is obliquely incident on the welded part and the ultrasonic wave reflected from the unmelted portion at the joint between the cladding tube 2 and the end plug 1 is detected to detect welding defects. That is,
If the weld is formed only in the vicinity of the surface due to insufficient heat input, as shown in FIG. When the ultrasonic wave enters the welded part 3 from an oblique direction, it passes through the welded part 3 and is reflected at the joint surface of the end plug 1 and the cladding tube 2.
したがって、端栓１と被覆管２の溶残し部分である接合
面で反射する超音波を検出することによって溶造不良を
検出することができる。また、第９図（Ｂ）に示すよう
に溶接作業の誤り等により溶接部３の中心部が端栓１と
被覆管２の接合部よりずれていて異常な状態で溶接され
ている揚台にも、超音波が溶接部３の斜め方向に入射し
、端栓１と被’ＩＲＭ２の溶残し部分である接合面で反
射する超音波を検出することによって、溶接位置不良に
よる溶接不良を検出することができる。Therefore, a welding defect can be detected by detecting the ultrasonic waves reflected at the joint surface, which is the unmelted portion of the end plug 1 and the cladding tube 2. In addition, as shown in Fig. 9 (B), due to an error in welding work, the center of the welded part 3 is shifted from the joint of the end plug 1 and the cladding tube 2, and the welding is performed in an abnormal state. Also, by detecting the ultrasonic waves that are incident on the welding part 3 in an oblique direction and reflected from the joint surface that is the unmelted part of the end plug 1 and the IRM 2, welding defects due to poor welding positions are detected. be able to.
（発明が解決しようとする問題点）
ところで、上記のような方法では、第１０図（Ａ）に示
すように端栓４を被覆管２に埋め込んだ後に、端栓４と
被覆管２との筒状接合面を溶接部３で溶接している場合
には、超音波探触子２２から超音波を第１０図（Ｂ）の
ように溶接部３に斜め方向に入射させても溜込不良を検
出することができないことがある。すなわち、第１０図
（Ｂ）に示すように、溶接溶込みが端栓４には達してい
る場合には、超音波は溶接部３を透過し、溶接溶込みが
まったく得られていない場合は、超音波はそのまま管２
の内部を通過してしまい、端栓４と被覆管２の間で上記
超音波が反射されないので、溶接不良による溜込不良を
検出することができないことがある等の問題がある。(Problems to be Solved by the Invention) By the way, in the above method, after the end plug 4 is embedded in the cladding tube 2 as shown in FIG. 10(A), the connection between the end plug 4 and the cladding tube 2 is When the cylindrical joint surface is welded at the welding part 3, even if the ultrasonic waves are incident on the welding part 3 from the ultrasonic probe 22 in an oblique direction as shown in FIG. 10(B), there will be no accumulation failure. may not be able to be detected. That is, as shown in FIG. 10(B), when the weld penetration has reached the end plug 4, the ultrasonic wave passes through the welded part 3, and when no weld penetration has been achieved, the ultrasonic wave passes through the weld part 3. , the ultrasonic wave remains in tube 2.
Since the ultrasonic waves are not reflected between the end plug 4 and the cladding tube 2, there are problems such as failure to detect accumulation due to poor welding.
本発明は、このような問題点を解決し、常に確実に溶接
部の良否を判定することができる判定方法を提供するこ
とを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a determination method that can solve these problems and always reliably determine the quality of a weld.
（問題点を解決するための手段）
本発明は、溶接部に超音波を入射して溶接の良否を判定
する方法において、溶接部の潜込方向に超音波を入射し
て、母材から反射される工］一群の特定エコーの高さと
、あらかじめ設定されているしきい値とを比較して溶接
の良否を判定することを特徴とする。(Means for Solving the Problems) The present invention is a method for determining the quality of welding by injecting ultrasonic waves into a welded part. [Process performed] The quality of welding is determined by comparing the height of a group of specific echoes with a preset threshold value.
（作 用）
溶接部の潜込方向に超音波を入射すれば、もし溶込深さ
が十分でなく溶接溶込幅が所定値以下であれば、上記超
音波の一部が溶接部内面あるいは両母材の接合面で反射
する。したがって、上記反射されるエコー群の特定のエ
コーの高さと、あらかじめ設定しているしきい値とを比
較することによって、特定エコーの高さがしきい値より
低ければ、溶接が良好であると判定する。(Function) If ultrasonic waves are applied in the direction of penetration into the weld, if the penetration depth is insufficient and the weld penetration width is less than a predetermined value, part of the ultrasonic waves will be transmitted to the inner surface of the weld or It is reflected at the joint surface of both base materials. Therefore, by comparing the height of a specific echo of the group of reflected echoes with a preset threshold value, if the height of the specific echo is lower than the threshold value, it is determined that the welding is good. .
（実施例）
第１図は本発明に係る超音波の良否判定方法の概略説明
図であって、第１図においては母材として核燃料棒の端
栓と被覆管を使用した場合を示す図である。ところで、
上記端栓４は被覆管２に埋め込められた後に、溶接部３
の溶込みが被覆管２０表面から端栓４の所定の深さまで
に達するように溶接されている。また超音波探傷器２０
は、ブラウン管２１および超音波探触子２２などを有し
、この超音波探触子２２を溶接部３の近傍に配置し、そ
の超音波探触子２２によって超音波探傷器２０からのパ
ルス電気信号によって励起された超音波を、矢印で示す
ように溶接部３の潜込方向（溶接面に対して垂直方向）
に入射させる。そして、上記端栓４と被覆管２の接合部
等から反射するエコー群の大きさを検知することによっ
て溶接部３の良否を判定する。(Example) Fig. 1 is a schematic explanatory diagram of the ultrasonic quality determination method according to the present invention, and Fig. 1 shows a case where the end plug and cladding tube of a nuclear fuel rod are used as the base material. be. by the way,
After the end plug 4 is embedded in the cladding tube 2, the welded portion 3
Welding is performed such that penetration reaches a predetermined depth from the surface of the cladding tube 20 to a predetermined depth of the end plug 4. Also, ultrasonic flaw detector 20
has a cathode ray tube 21, an ultrasonic probe 22, etc., and this ultrasonic probe 22 is placed near the welding part 3, and the ultrasonic probe 22 detects pulsed electricity from the ultrasonic flaw detector 20. The ultrasonic wave excited by the signal is directed into the welding area 3 in the direction shown by the arrow (perpendicular to the welding surface).
Inject it into the Then, the quality of the welded portion 3 is determined by detecting the size of the echo group reflected from the joint between the end plug 4 and the cladding tube 2, etc.
第２図（Ａ）は端栓４を被覆管２に埋め込んだ後に被覆
管２の表面から溶接した場合に、その溶接が完全に行な
われた状態を示覆溶接部の断面図であって、溶接部３の
潜込方向に超音波探触子２２から超音波が入射されると
、その超音波の一部は、矢印で示すように、溶接部３の
表面で反射され、第２図（Ｂ）に示すようにブラウン管
２１に表面エコー１０として表示される。また、溶接部
３に入射された超音波の他の部分は、溶接部３を通過し
、端栓４“内に侵入してしまい、反射されることがなく
ブラウン管には管肉厚エコー群１１がしきい値１３より
高く表われない。したがって、上記溶接部３が完全な状
態であることを確認することができる。FIG. 2(A) is a cross-sectional view of the welded part showing a completely welded state when the end plug 4 is embedded in the cladding tube 2 and then welded from the surface of the cladding tube 2, When an ultrasonic wave is incident from the ultrasonic probe 22 in the direction of penetration into the weld 3, a part of the ultrasonic wave is reflected from the surface of the weld 3 as shown by the arrow, and as shown in FIG. As shown in B), this is displayed on the cathode ray tube 21 as a surface echo 10. Further, the other part of the ultrasonic wave incident on the welding part 3 passes through the welding part 3 and enters the end plug 4'', and is not reflected, leaving the tube wall thickness echo group 11 in the cathode ray tube. does not appear higher than the threshold value 13. Therefore, it can be confirmed that the welded portion 3 is in a perfect state.
第３図（Ａ＞は溶接部３の溶込みが被覆管２の肉厚りの
半分位までしか達しなくて、被覆管２と端栓４が完全に
溶接されてない場合を示す断面図であって、この場合に
は前述と同様に溶接部３の潜込方向に超音波探触子２２
から超音波を入射すると、その超音波の一部が矢印で示
すように溶接部３の表面で反射され、第３図（Ｂ）に示
すようにブラウン管に表面エコー１０として表示される
。Figure 3 (A> is a sectional view showing the case where the penetration of the welded part 3 reaches only about half of the wall thickness of the cladding tube 2, and the cladding tube 2 and the end plug 4 are not completely welded. In this case, the ultrasonic probe 22 is placed in the direction of penetration into the welded part 3 as described above.
When an ultrasonic wave is incident from the welding part 3, a part of the ultrasonic wave is reflected from the surface of the welded part 3 as shown by the arrow, and is displayed as a surface echo 10 on the cathode ray tube as shown in FIG. 3(B).
また、溶接部３に入射された超音波の他の部分は、溶接
部３の内部に侵入するが、被覆管２と端栓４とが溶接さ
れてないため超音波が被覆管２の表面と底面との間で反
射を繰り返し、被覆管２の表面から上記反射した超音波
の一部が順次外部に放出されブラウン管上には被覆管２
の肉厚りに対応した間隔を有する管肉厚エコー群１１が
前記表面エコー１０の後ろに表示される。すなわち、こ
の管肉厚エコー群１１の各エコーにお番プる時間間隔Ｔ
は、超音波が被覆管２の肉厚りを往復する時間であって
全く等しい。また、管肉厚エコー群１１の各エコーの高
さは、超音波が被覆管２の表面と底面との間で反射を繰
り返し、時間の経過とともに減衰して低くなる。一方、
超音波探傷器２０には、上記管肉厚エコーの所定時間内
のエコーのみを外部に取出すためのゲート信号１２が設
定されており、このゲート信号１２０時間領域に発生し
た管肉厚エコーが所定のしきい値１３ど比較される。Further, the other part of the ultrasonic waves incident on the welded part 3 enters the inside of the welded part 3, but since the cladding tube 2 and the end plug 4 are not welded, the ultrasonic waves do not touch the surface of the cladding tube 2. After repeated reflections between the cladding tube 2 and the bottom surface, some of the reflected ultrasonic waves are sequentially emitted to the outside from the surface of the cladding tube 2, and the cladding tube 2 is deposited on the cathode ray tube.
A tube wall thickness echo group 11 having intervals corresponding to the wall thickness is displayed behind the surface echo 10. That is, the time interval T between each echo of this tube wall thickness echo group 11 is
is the time required for the ultrasonic wave to travel back and forth through the thick wall of the cladding tube 2, and is completely equal. Further, the height of each echo in the tube wall thickness echo group 11 decreases as the ultrasonic waves are repeatedly reflected between the surface and the bottom of the cladding tube 2 and are attenuated over time. on the other hand,
The ultrasonic flaw detector 20 is set with a gate signal 12 for extracting only the echoes within a predetermined time period of the pipe wall thickness echoes to the outside. The threshold value 13 is compared.
しかして、上述のように溶接深さが被覆管２と端栓４と
の接合面に達してないような場合には、上記管肉厚エコ
ー群１１がしきい値１３より大となり、これによって溶
接部３が不良であることを検出することができる。However, as mentioned above, when the welding depth does not reach the joint surface between the cladding tube 2 and the end plug 4, the tube wall thickness echo group 11 becomes larger than the threshold value 13, and as a result, It is possible to detect that the welded portion 3 is defective.
また、第４図（Ａ）に示すように溶接部３が被覆管２と
端栓４との接合面に達してはいるが、その溶込深さが十
分でなく溶接溶込幅ｄが超音波探触子２２のビーム径よ
り小さいときには、溶接部３の溶造方向に超音波探触子
２２がら入射され溶接部３内に侵入した超音波の一部は
端栓４内に侵入するが、超音波の伯の部分が被覆管２と
端栓４の間で反射されるので、第４図（Ｂ）に示すよう
にブラウン管上に管肉厚工］一群１１として表示される
。このにうな第４図（Ｂ）に示す管肉厚エコー群１１を
、端栓４と被覆管２とが溶接されていない場合を示した
第３図（Ｂ）における管肉厚エコー群１１と比較すると
、管肉厚工］一群１１の高さは溶接部３の溶接溶込幅ｄ
に依存し、第４図（Ｂ）に示す管肉厚工］一群１１の高
さの方が低く、減衰が大きい。In addition, as shown in Fig. 4(A), although the welded part 3 has reached the joint surface between the cladding tube 2 and the end plug 4, the penetration depth is not sufficient and the weld penetration width d exceeds the welded part 3. When the beam diameter is smaller than the beam diameter of the sonic probe 22, a part of the ultrasonic waves that are incident on the welding part 3 through the ultrasonic probe 22 and enter the welding part 3 enter the end plug 4. Since the square portion of the ultrasonic wave is reflected between the cladding tube 2 and the end plug 4, it is displayed as a group 11 of tube wall thickness on the cathode ray tube as shown in FIG. 4(B). The pipe wall thickness echo group 11 shown in FIG. 4(B) is different from the pipe wall thickness echo group 11 in FIG. 3(B) which shows the case where the end plug 4 and the cladding tube 2 are not welded. In comparison, the height of the first group 11 is equal to the weld penetration width d of the welded part 3.
The height of the first group 11 is lower and the damping is larger.
しかして、上述のように溶接部３が被覆管２と端栓４と
の接合面に達してはいるが、その溶込深さが十分でなく
溶接溶込幅ｄが超音波探触子２２のビーム径より小さい
場合には、上記管肉厚工］一群１１がしぎい値１３より
大となり、これにより溶接部３が完全な状態でないこと
を検出することができる。Although the welded portion 3 has reached the joint surface between the cladding tube 2 and the end plug 4 as described above, its penetration depth is insufficient and the weld penetration width d is larger than the ultrasonic probe 22. When the beam diameter is smaller than the beam diameter, the above-mentioned tube wall thickness work] group 11 becomes larger than the threshold value 13, and it can therefore be detected that the welded part 3 is not in a perfect state.
第５図（Ａ＞は端栓５の一部を被覆管２にはめ込んだ後
に、被覆管２の端面を上記端栓５に対して被覆管２の表
面から溶接した場合における状態を示す断面図であって
、溶接部３の溶造方向に超音波探触子２２から超音波が
入射されると、その超音波が溶接部３を通過し、端栓４
内に侵入してしまい、反射されることがなく第５図（Ｂ
）に示すようにブラウン管には管肉厚エコー群１１がし
きい値１３より高く表われない。したがって、上記溶接
部３が完全な状態であることを確認することができる。FIG. 5 (A> is a cross-sectional view showing the state when a part of the end plug 5 is fitted into the cladding tube 2 and then the end surface of the cladding tube 2 is welded to the end plug 5 from the surface of the cladding tube 2. When ultrasonic waves are incident from the ultrasonic probe 22 in the welding direction of the welded part 3, the ultrasonic waves pass through the welded part 3 and the end plug 4
Figure 5 (B) without being reflected.
), the tube thickness echo group 11 does not appear higher than the threshold value 13 on the cathode ray tube. Therefore, it can be confirmed that the welded portion 3 is in a perfect state.
第６図（Ａ）は溶込みが被覆管２の肉厚の途中までしか
達しなくて、被覆管２と端栓５が完全に溶接されてない
場合を示す断面図であって、この場合には前述と同様に
溶接部３の溶造方向に超音波探触子２２から超音波を入
射すると、この超音波の一部が端栓５と被覆管２の接合
部の近傍で反射を繰り返し、被覆管２の表面から上記反
射した超音波の一部が順次外部に放出され、第６図（Ｂ
）に示すようにブラウン管上には被覆管２の肉厚に対応
した間隔を有する管肉厚工］一群１１が表向エコー１０
の後に表示される。FIG. 6(A) is a sectional view showing a case where the penetration reaches only halfway through the wall thickness of the cladding tube 2 and the cladding tube 2 and the end plug 5 are not completely welded. As described above, when an ultrasonic wave is applied from the ultrasonic probe 22 in the welding direction of the welded part 3, a part of this ultrasonic wave is repeatedly reflected near the joint between the end plug 5 and the cladding tube 2. A portion of the ultrasonic waves reflected from the surface of the cladding tube 2 is sequentially emitted to the outside, as shown in FIG.
) As shown in FIG.
displayed after.
しかして、上述のように溶接部３の溶込みが十分でない
場合には、上記管肉厚工」一群１１がしきい値１３より
大となり、これによって溶接部３が不良であることを検
出することができる。However, if the penetration of the welded part 3 is not sufficient as described above, the pipe thickness work group 11 becomes larger than the threshold value 13, thereby detecting that the welded part 3 is defective. be able to.
また、上記実施例においては管状物体の溶接部の良否判
定について説明したけれども、第７図に示すように平板
６上に伯の平板状物体７を溶着したものにも適用するこ
とができる。Further, although the above embodiment describes the quality determination of a welded portion of a tubular object, the present invention can also be applied to a case where a flat plate-shaped object 7 is welded onto a flat plate 6 as shown in FIG.
溶接部の溶造方向に超音波を入射し、母材で反射される
■］一群の高さを検出し、このＩ Ｔｌ一群の高さがし
きい値Ｊ：り低いか高いかによって、溶接部にお【ノる
溶接が十分であるか否かを判定覆ることができる。また
、管肉厚エコー群の高さは溶接溶込幅に対応した大きさ
となるので、その高さが一定値以下であることを検出す
ることによって上記溶接溶込幅が所定値以上となってい
ることを確認でき、溶接不良を見落とすようなことがな
く、判定性能を一段と面上せしめることができる。Ultrasonic waves are applied in the welding direction of the weld, and the height of the group reflected by the base material is detected, and depending on whether the height of this group is lower or higher than the threshold J:, It is possible to overturn whether or not the welding is sufficient. In addition, the height of the pipe wall thickness echo group corresponds to the weld penetration width, so by detecting that the height is below a certain value, the weld penetration width becomes greater than the predetermined value. It is possible to confirm that the welding process is in progress, prevent welding defects from being overlooked, and further improve judgment performance.
第１図は本発明に係る溶接部の良否判定方法の概略説明
図、第２図（Ａ）、（Ｂ）ないし第７図はそれぞれ本発
明の作動説明図、第８図は燃料棒における端栓部の分解
斜視図、第９図（Ａ）、（Ｂ）および第１０図（Ａ）、
（Ｂ）はそれぞれ超音波を斜め方向に入射されて溶接部
の良否を判定する方法の説明図である。
２・・・被覆管、３・・・溶接部、４，５・・・端栓、
６゜７・・・平板、１０・・・表面エコー、１１・・・
管肉厚エコー群、１２・・・グー１〜信号、１３・・・
しきい値、Ｄ・・・被覆管の肉厚、ｄ・・・溶接溶込幅
。
出願人代理人 佐 藤 −Ｈ１
第１図
（Ａ）
（Ｂ）
［
本
°ゼ
第４図
（Ａ） 第５図
□
第８図
（Ａ）（Ｂ）
（Ａ） （Ｂ）
第７図Fig. 1 is a schematic explanatory diagram of a method for determining the quality of a welded part according to the present invention, Figs. 2 (A), (B) to 7 are explanatory diagrams of the operation of the present invention, and Fig. 8 is an illustration of the end of a fuel rod. Exploded perspective views of the stopper, FIGS. 9(A), (B) and 10(A),
(B) is an explanatory diagram of a method for determining the quality of a welded portion by applying ultrasonic waves in an oblique direction. 2... Cladding tube, 3... Welded part, 4, 5... End plug,
6゜7...Flat plate, 10...Surface echo, 11...
Tube thickness echo group, 12... Goo 1 ~ signal, 13...
Threshold value, D... wall thickness of cladding tube, d... weld penetration width. Applicant's agent Sato-H1 Figure 1 (A) (B) [This Figure 4 (A) Figure 5 □ Figure 8 (A) (B) (A) (B) Figure 7
Claims (1)
おいて、前記溶接部の溶込方向に前記超音波を入射して
、母材から反射されるエコー群の特定エコーの高さを検
出して、この特定エコーの高さと、あらかじめ設定され
ているしきい値とを比較して溶接の良否を判定すること
を特徴とする溶接部の良否判定法。In a method for determining the quality of welding by injecting ultrasonic waves into a welded part, the ultrasonic waves are injected in the penetration direction of the welded part, and the height of a specific echo of a group of echoes reflected from the base metal is detected. A method for determining the quality of a welded part, characterized in that the height of this specific echo is compared with a preset threshold value to determine the quality of the weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8220386A JPS62239007A (en) | 1986-04-11 | 1986-04-11 | Quality deciding method for weld zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8220386A JPS62239007A (en) | 1986-04-11 | 1986-04-11 | Quality deciding method for weld zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62239007A true JPS62239007A (en) | 1987-10-19 |
Family
ID=13767866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8220386A Pending JPS62239007A (en) | 1986-04-11 | 1986-04-11 | Quality deciding method for weld zone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62239007A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106821A (en) * | 2009-11-12 | 2011-06-02 | Mitsubishi Electric Corp | Welding bead measuring method of pipe material, welding bead cutting method, and welding bead cutting apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56164953A (en) * | 1980-05-26 | 1981-12-18 | Toyota Central Res & Dev Lab Inc | Ultrasonic inspecting device for junction part |
| JPS5997003A (en) * | 1982-11-27 | 1984-06-04 | Mitsubishi Heavy Ind Ltd | Measurement of weld penetration depth |
| JPS6042416A (en) * | 1983-08-17 | 1985-03-06 | Kao Corp | Production of polyurethane resin excellent in water absorption and water retention |
-
1986
- 1986-04-11 JP JP8220386A patent/JPS62239007A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56164953A (en) * | 1980-05-26 | 1981-12-18 | Toyota Central Res & Dev Lab Inc | Ultrasonic inspecting device for junction part |
| JPS5997003A (en) * | 1982-11-27 | 1984-06-04 | Mitsubishi Heavy Ind Ltd | Measurement of weld penetration depth |
| JPS6042416A (en) * | 1983-08-17 | 1985-03-06 | Kao Corp | Production of polyurethane resin excellent in water absorption and water retention |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106821A (en) * | 2009-11-12 | 2011-06-02 | Mitsubishi Electric Corp | Welding bead measuring method of pipe material, welding bead cutting method, and welding bead cutting apparatus |
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