JP2002122576A - 熱可塑性樹脂製管の継手部の非破壊検査方法 - Google Patents
熱可塑性樹脂製管の継手部の非破壊検査方法Info
- Publication number
- JP2002122576A JP2002122576A JP2000313970A JP2000313970A JP2002122576A JP 2002122576 A JP2002122576 A JP 2002122576A JP 2000313970 A JP2000313970 A JP 2000313970A JP 2000313970 A JP2000313970 A JP 2000313970A JP 2002122576 A JP2002122576 A JP 2002122576A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- inspection method
- joint
- thermoplastic resin
- pipe
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8292—Testing the joint by the use of ultrasonic, sonic or infrasonic waves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
- B29C65/3432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding comprising several wires, e.g. in the form of several independent windings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/048—Transmission, i.e. analysed material between transmitter and receiver
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
手部の接合不良の非破壊検査を可能にする。 【解決手段】 熱可塑性樹脂製管の継手部の内部に超音
波発信器を設置し、さらに継手部の外周に沿って超音波
受信器を非接触で移動させて超音波の漏洩の有無を検出
する熱可塑性樹脂製管の継手部の非破壊検査方法。
Description
の継手部の非破壊検査方法に関し、更に詳しくは1対の
熱可塑性樹脂製管を溶接、融着などにより接合して構成
された継手部の接合不良を継手部に傷をつけることなく
検査する熱可塑性樹脂製管の継手部の非破壊検査方法に
関する。
溶接部)の検査方法としては、一般的には継手部内を加
圧もしくは負圧にすることによって継手部からの漏洩が
ないか、ゲージにより確認する方法があった。例えば熱
可塑性樹脂製管の継手部を加圧漏洩試験機を用いて一時
的に加圧または負圧にし、試験規格に定められた圧力状
態で一定時間放置し、圧力確認ゲージで変化を見て漏洩
がないことを確認するといった圧力式試験方法である。
は、超音波試験法とも言われる、一つのセンサーを用い
る超音波パルス反射試験法がある。この試験法は、溶接
された継手部に接触式超音波探傷機を用いるが、その
際、適当な接触媒質、例えばエチレングリコールを溶接
部上に塗布して接触式センサーと被検査部との間で超音
波が減衰することを防ぎ、直管部と溶接部の界面で欠陥
個所が無いことを確認するといった方法であった。
力式試験方法では、とりわけ大口径のパイプ(一般的に
φ300からφ2000またはそれ以上の口径のものを
いう)においては作業時間を要することからコストが高
い上に、欠陥部を特定しにくいといった問題点があっ
た。また、作業上の安全性に十分注意する必要があり今
後の試験方法としては定着困難なものとなってきた。
波パルス反射試験法は、超音波の送信及び受信を行う一
つのセンサーによって作業を実施するため作業範囲がセ
ンサー径範囲に限られる非常に狭いものとなり、またセ
ンサーを母材に接触させ母材内分子を振動させることで
超音波を進行させるため、必ず被試験体上に適当な接触
媒質を塗布し超音波の信号が被試験体に入射する前に減
衰するのを防ぐよう処置する作業が必要であり、また試
験完了後塗布した接触媒質を取り除く作業を必須として
いた。さらには母材の特性や、母材に含まれる異物に左
右されることがあったため、インサートされた電熱線で
接合がなされた継手融着部の検査方法では、探傷結果が
本来の欠陥であるかどうか判別が非常に困難となってい
た。
脂製管の継手部の内部に超音波発信器を設置し、さらに
継手部の外周に沿って超音波受信器を非接触で移動させ
て所定の大きさ以上の超音波の漏洩の有無を検出するこ
とを特徴とする熱可塑性樹脂製管の継手部の非破壊検査
方法を提供するものである。
波発信器を設置し、さらに超音波受信器を継手部の外周
に沿って非接触で移動させ、所定の大きさ以上の超音波
の漏洩の有無を検出し、それによって作業準備が簡単
で、短時間に、かつ安全に継手部の接合不良の非破壊検
査が可能になる。
波とは、継手部に最低限必要な溶接部または融着部の肉
厚(長さ)を通過する大きさまたは強度(しきい値)以
上の超音波を意味し、例えば、材質がポリエチレンの場
合は、肉厚:約20mmを通過する約−15.4mmデ
シベル(dB)以上の超音波を約−9.5デシベル(d
B)で感知する。この場合の超音波の周波数としては、
20〜100KHz、好ましくは40KHzを中心とす
る周波数が上げられる。
音波を発信させ、超音波受信器を用いて欠陥をしらべよ
うとする溶接部を厚さ別に通過する音のみ感知するよう
に試験条件を設定した。つまりその発信器及び受信器の
音レベルの調整によって欠陥であるか否かの判断指標を
管の厚さ及び口径別に整えた。その結果、被試験体の材
質や電気融着(以下EFと称する)継手上の電熱線等に
関係することなく欠陥部を探傷することができ、また継
手部上を約50mm/sの速さで操作することが可能で
ある。従って作業時間の大幅な削減ができる。また無圧
力式の検査方法であるため、安全が保障される。特に大
がかりな作業準備を必要としないため、作業が簡便であ
る。
するに際しては、さらに、この超音波発信器の両側又は
片側に、管内を遮閉することにより超音波の漏洩を防止
する超音波漏洩防止板を設置すると、発生させる超音波
を有効に検査に生かすことができる。もちろんこの超音
波漏洩防止板は、検査後は邪魔になるので、継手部から
取りはずし可能でなければならない。なお、継手部から
管の端部開口(複数の管が接合されている場合は、最終
端開口)までの寸法が長い場合(例えば40m以上)
や、既設の管に接続される場合は片側の超音波漏洩防止
板を省略してもよい。
づいて本発明を詳述する。なお、これによってこの発明
が限定されるものではない。
管の継手部の非破壊検査方法の実施の形態1を説明する
ための継手部の分解説明斜視図、図2はその実施の形態
1で継手部内面に用いる超音波探傷用発信器及び受信器
まわりの状態を表す概略構成説明図、図3は異なる例を
示す図2相当図である。
脂製管としてのポリエチレン製上下水道用接続管、2は
熱可塑性樹脂製管としてのポリエチレン製上下水道用被
接続管、3は接続管1の一端に形成された受け口、3a
はその受け口の内周面上に巻設された電熱線であり、4
は接続管の一端に成形された差し口である。接続管1の
差し口4を被接続管2の受け口3に差し込み、電熱線3
aに通電して差し口4と受け口3とを熱融着により接合
し、継手部10を形成する。
音波探傷機の発信器5を設置し、超音波探傷機の受信器
7を用いて継手部10の外周に沿って移動させ、探傷す
るといった方法を用いる。そのとき発信器5から発せら
れる超音波(40KHz)は直線距離で約80mの空気
内振動を生じ伝達するため、超音波が継手部又は管の両
端開口部分より外部に漏洩するのを防止する必要があ
る。そこで、両端開口部分に、円盤状の樹脂製基板8に
弾性リングとしてのゴム製の防振材9を取り付けたもの
を図2のように管内に密着固定しても良いが、好ましく
は管端面に簡易的に圧着しても良い。また、管敷設が進
行しており、一方が十分な施工延長を有する場合は、新
規に接合される側のみ密封が必要とされるため、図3の
ように管端面に円盤状の樹脂製基板8aとこの基板の片
面に張り合わされた弾性板としての防振材9aを係止バ
ネ6で管に固定し、試験を行うことができる。
箇所に沿って受信器7を非接触にて移動させていくと欠
陥個所より超音波が漏洩し、受信器7で受信することが
できる。その際、受信器7は、継手軸方向に照査するこ
とが望ましく、管表面から漏洩する超音波を逆に入射し
ないよう注意する必要がある。さらに詳しく説明すると
図4に示される受け口10と差し口4から構成されるE
F継手部の断面において十分な融着が行われている場合
(11)は、超音波探傷機の発信器5から発せられる超
音波は、軸方向に照査され受信器7に到達することはな
い。しかし、図5に示す断面のように未完全な融着状態
(12)であれば、発信器5から発せられた超音波は、
受信器7に到達しアラーム音によって欠陥であることが
判明する。また、発信器5及び受信器7は、超音波の音
レベルを調整することができ、熱可塑製樹脂製管の厚さ
及び口径によって設定することができる。
厚)別超音波浸透条件を後で挙げる表1に示す。この結
果を参考に、口径別探傷試験条件を設定することがで
き、たとえば、口径600mmの電気融着継手部を探傷
する場合、発信器レベルは7(出力:−15.4デシベ
ルに相当)に、受信器レベルは6(出力:−9.5デシ
ベルに相当)にそれぞれ設定すると良い。
まり継手部内より融着の面積差に対応して浸透する超音
波によって合否の判定を行うことができるため、これま
で超音波パルス反射法を用いた試験法で、おもにEF接
合部の電熱線などといった異物によって発生する反射ピ
ークの合否判別を必要とせず、EF接合箇所も問題なく
検査することが可能となり、また一般溶接部においても
低廉で作業性の良い継手検査方法を確立することが可能
となった。
発信器を設置し、さらに超音波受信器を継手部の外周に
沿って非接触で移動させ、所定の大きさ以上の超音波の
漏洩の有無を検出し、それによって、作業準備が簡単
で、短時間に、かつ安全に継手部の接合不良の非破壊検
査が可能になる。
破壊検査方法の実施の形態1を説明するための継手部の
分解説明斜視図である。
受信器まわりの状態を示す概略構成説明図である。
Claims (5)
- 【請求項1】 熱可塑性樹脂製管の継手部の内部に超音
波発信器を設置し、さらに継手部の外周に沿って超音波
受信器を非接触で移動させて所定の大きさ以上の超音波
の漏洩の有無を検出することを特徴とする熱可塑性樹脂
製管の継手部の非破壊検査方法。 - 【請求項2】 継手部の内部に超音波発信器を非接触で
設置するに際して、併せて、この超音波発信器の両側又
は片側に、管内を遮閉することにより超音波の漏洩を防
止する超音波漏洩防止板を取りはずし可能に設置する請
求項1に記載の非破壊検査方法。 - 【請求項3】 超音波漏洩防止板が、円盤状樹脂製基板
と、この基板の外周縁に取り付けられた弾性リングとか
らなり、超音波漏洩防止板を超音波発信器の両側又は片
側に設置するに際して、管内に前記基板と弾性リングを
押し込む請求項2に記載の非破壊検査方法。 - 【請求項4】 超音波漏洩防止板が、円盤状樹脂製基板
と、この基板の片面に張り合わされた弾性板とからな
り、超音波漏洩防止板を超音波発信器の両側又は片側に
設置するに際して、超音波漏洩防止板の前記弾性板の側
面を管の開口端部周縁に押し付ける請求項2に記載の非
破壊検査方法。 - 【請求項5】 継手部が、1つの熱可塑性樹脂製管の差
し口を、もう1つの熱可塑性樹脂製管の受け口に差し込
み、その差し込み部分を、管内からの溶接によるか、前
記差し口又は受け口に予めインサートされた電熱線への
通電に基づく融着により接合して構成されてなる請求項
1〜4のいずれか1つに記載の非破壊検査方法。
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Cited By (6)
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JP2009043469A (ja) * | 2007-08-07 | 2009-02-26 | Panasonic Ev Energy Co Ltd | 電池の製造方法および電池の検査方法 |
CN102285120A (zh) * | 2011-07-27 | 2011-12-21 | 浙江大学 | 电熔接头冷焊缺陷判定方法 |
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WO2020136370A1 (en) * | 2018-12-24 | 2020-07-02 | Edwards Limited | Method and apparatus for leak point detection |
JP2021162335A (ja) * | 2020-03-30 | 2021-10-11 | タキロンシーアイシビル株式会社 | 継手構造の検査方法および継手構造 |
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2000
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009043469A (ja) * | 2007-08-07 | 2009-02-26 | Panasonic Ev Energy Co Ltd | 電池の製造方法および電池の検査方法 |
CN102285120A (zh) * | 2011-07-27 | 2011-12-21 | 浙江大学 | 电熔接头冷焊缺陷判定方法 |
CN102285120B (zh) * | 2011-07-27 | 2013-07-31 | 浙江大学 | 电熔接头冷焊缺陷判定方法 |
CN102514193A (zh) * | 2011-12-19 | 2012-06-27 | 浙江大学 | 能够防止产生冷焊与过焊缺陷的电熔焊接方法及电熔焊机 |
CN102514193B (zh) * | 2011-12-19 | 2014-04-16 | 浙江大学 | 能够防止产生冷焊与过焊缺陷的电熔焊接方法及电熔焊机 |
EP3299147A1 (de) * | 2016-09-23 | 2018-03-28 | Friatec Aktiengesellschaft | Verfahren zur zerstörungsfreien prüfung einer schweissnaht, die mithilfe der heizwendelschweisstechnik ausgebildet worden ist, und eine entsprechende anordnung |
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GB2580176B (en) * | 2018-12-24 | 2021-09-29 | Edwards Ltd | Method and apparatus for leak point detection |
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JP2021162335A (ja) * | 2020-03-30 | 2021-10-11 | タキロンシーアイシビル株式会社 | 継手構造の検査方法および継手構造 |
JP7225157B2 (ja) | 2020-03-30 | 2023-02-20 | タキロンシーアイシビル株式会社 | 継手構造の検査方法および継手構造 |
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