JPH02307727A - 電気溶接される継手の溶接時間制御方法および継手 - Google Patents

電気溶接される継手の溶接時間制御方法および継手

Info

Publication number
JPH02307727A
JPH02307727A JP1130346A JP13034689A JPH02307727A JP H02307727 A JPH02307727 A JP H02307727A JP 1130346 A JP1130346 A JP 1130346A JP 13034689 A JP13034689 A JP 13034689A JP H02307727 A JPH02307727 A JP H02307727A
Authority
JP
Japan
Prior art keywords
welding
joint
coil
temperature
welded
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
Application number
JP1130346A
Other languages
English (en)
Inventor
Saburo Akiyama
三郎 秋山
Hiroshi Oya
博 大矢
Takeshi Kato
健 加藤
Satoru Oe
大江　悟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP1130346A priority Critical patent/JPH02307727A/ja
Publication of JPH02307727A publication Critical patent/JPH02307727A/ja
Pending legal-status Critical Current

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"
    • B29C65/3404—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
    • 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"
    • B29C65/3468—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 means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B29C66/1224—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 butt 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
    • B29C66/50—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
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • 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
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は熱可塑性プラスチック管を電気溶接する継手お
よびこの継手の溶接時間制御方法に関する。
［従来の技術］ 従来、この種の技術として、特公昭６３−２４８２０号
公報にて開示された電気溶接されるユニオン継手の溶接
時間制御方法がある。このものは第３図に示すごとく、
内周側にコイルを埋設した継手の表面にコイル３，３′
から一定距離までの深さの凹所５，５′を設け、該凹所
５，５′内に加熱された溶接域の材料を膨張させて凹所
に設けたセンサ４，４′により膨張した材料の温度変化
を検出してコイル３，３′への電流供給を遮断する信号
を出力するようにしたものである。
［発明が解決しようとする課題］ しかしながら前記従来の方法は制御上難点がある。すな
わち前記従来例では、継手のコイル３．３′と凹所５，
５′の底面までの間に熱の不良導体である継手材料が介
在していること。
更に凹所５，５′に継手材料を膨張させて膨張した材料
の温度変化を検出する様にしているため、凹所５，５′
の底面と凹所５，５′に挿入したセンサ４，４′との間
に空気の層が介在していること。これ等の要因によって
実際にセンサ４，４′で検出される温度は、管と溶接す
る継手の溶接部温度との間に差が生じ、継手の溶接部温
度より低い値で検出される。特に凹所５゜５′内に膨張
する継手材料は熱の不良導体のため継手内のコイル３，
３′から凹所５，５′の底面までの距離によって熱の伝
導が大きく異なり、またセンサ４，４′と凹所５，５′
の底面との間に介在する空気の層も熱の不良導体である
ため、更にこの空気の温度も作用して、正確な継手溶接
部の温度を検出するのが困難で、又時間的な遅れも生じ
る。
実験によれば、溶接時の継手周囲の環境温度によってセ
ンサ４，４′による検出温度の値が著しく異なり、セン
サ４．／ｌ’の検出温度値によって電流を遮断しても溶
接部温度の過剰や過小によって満足な溶接状態が得られ
ない問題が生じる。
例えば２０℃で最適な溶接状態が得られるセンサ４，４
′の検出温度を１００℃と設定して、０°Ｃの周囲温度
で溶接した場合］００’Ｃの検出温度で電流を遮断して
も電流の通電時間か過剰とな一３＝ す、溶接部の温度が」１昇および溶接時間が長すぎて管
および継手の溶接部が変形し実用に供し得ない。又一方
４０℃の周囲温度で溶接した場合、１００℃の検出温度
で電流を遮断しても電流の通電時間が過小となり、溶接
部の温度が不足および溶接時間が短かすぎて溶接部の溶
融状態の不足で管と継手が完全に溶接されない問題が生
じる。
更に又凹所５，５′内へ挿入するセンサ４゜４′の挿入
深さによってもセンサ４，４′の検出温度に大きな差が
見られ、わずかの挿入深さの違い例えば凹所５，５′の
底面からの距離が０．５世異なると検出温度で１０〜１
５℃の誤差を生じる問題がある。
更に又、コイル３，３′を継手内面に埋設する埋設深さ
のバラツキや継手１の内径と管２゜２′の外径寸法との
違いによる継手１と管２の接触状態のバラツキによって
も溶接状態が大き　□く異なり、常に最適な溶接状態が
得られない問題がある。
このため、溶接時の周囲環境温度によって電流を遮断す
る設定温度を変えるようにしたとしても、センサ４，４
′の挿入深さや管２，２′の外径寸法等を厳しく管理す
る必要かあり、」１記従来の制御方法および継手では常
に最適な溶接状態を得ることは非常に困難なものであっ
た。
本発明は」１記の問題を解決することを目的とするもの
である。
［課題を解決するための手段］ 本発明の要旨は、熱可塑性絶縁材料でできた２つの部材
を互いにその面を合せて接触させ、接触面の一部に設け
たコイルに電流を通すことによりコイルを設けた部月の
溶接域が加熱され、該加熱によってコイルを設けた部材
に隣り合う部材の接触面を加熱して前記２つの部オツか
溶接されるものにおいて、前記コイルを設けた部材の溶
接域に貫通凹所を設け、該貫通凹所に設けた温度センサ
を前記コイルを設けた部材に隣り合う部材の接触面に当
接させ、前記溶接域の加熱によって加熱される部材の接
触面の温度を検出して前記コイルへの電流供給を遮断す
る信号を出力することを特徴とする電気溶接される継手
の溶接時間制御方法と、 熱可塑性絶縁材料でてき゛た継手の内面側に被接合部材
を電気溶接するためのコイルを密着又は埋設し、コイル
に電流を通すことによりコイルを設けた部分の材料が可
熱される溶接域を有す継手において、前記溶接域に外面
から内面に通じる貫通凹所を設け、該貫通凹所に温度セ
ンサを挿入して被接合部材の表面温度を検出するように
したことを特徴とする電気溶接される継手である。
［作用コ 本発明は上記の構成であるから温度センサは、コイルを
設けた溶接域の加熱によって加熱される部材の溶接域に
隣り合う部分の接触面に当接させるため、確実に２つの
部材が溶接される界面部分に接して溶接部の温度を検出
する。
このため従来のごとく溶接部とセンサとの間に継手材料
や空気層等の介在物が無く、溶接される界面部に直接接
触するので検出温度の誤差や検出時間の遅れ等が無い。
更にコイルを設けた部材の溶接域に隣り合う部材の接触
面に当接するため、溶接する２つの部材の接触面間に隙
間等があって接触状態にバラツキがあっても加熱される
部材側の温度を検出しているので、正確に２つの部材が
接触する溶接部の温度を直接検出する。
このため従来のごとく溶接時の周囲環境温度やセンサの
挿入深さおよび溶接部の接触状態のバラツキ等に左右さ
れることなく、溶接部の温度を正確に検出して電流供給
を遮断するので、溶接条件に関係なく常に最適な溶接状
態で溶接することが可能となる。
［実施例］ 以下図面を参照して本発明の実施例について説明する。
第１図は２つの管２１．２２を接続するのに用いる継手
ｌＯを示すもので、継手１０は管２１．２２と同じ材質
のポリエチレン等の熱可塑性材料からなり、その内径は
ポリエチレン製の管２１．２２よりやや大きく管２１．
２２が内面に挿入可能に形成されている。継手ｌＯの内
面側近傍には内径より一定距離の位置にコイル３１．３
２を連続して埋設してあり、両端部で一面側に突出する
端子６１．６２に接続しである。端子６１．６２には作
業者によってコネクター７１．７２が接続され、コイル
３１．３２に電流が供給される。端子６１．６２の近傍
で継手１０の一面側には外面から内面に通じる貫通した
凹所５１．５２を設けである。この凹所５１．５２はこ
れに挿入する温度センサ８１．８２とほぼ同一径で、継
手１０に埋設されたコイル３１．３２の溶接域にコイル
３１．３２に触れない様に設けられる。凹所５１゜５２
内にはコネクター７１．７２と一体的に設けた温度セン
サ８１，８２が挿入され、継手ＩＯ内に挿入した管：２
１．２２の外表面に当接させる。この状態で継手ｌＯへ
のコネクター７１．７２と温度センサ８１゜８２の接続
が完了する。
本実施例によれば、コイル３１，３２の電源回路は第２
図に示すごとく、作業者によって一旦閉じられコイル３
１．３２への通電が開始された後、溶接完了時点で自動
的に開きコイル３１．３２への通電が停止される。この
自動通電停止は、コイル３１．３２が埋設された溶接域
で端子６１．６２に隣接して設けた凹所５１．５２内に
挿入され、管２１゜２２の外表面の温度を検出する温度
センサ８１，８２によって、設定温度例えば１９０℃に
設定した場合、温度センサ８１　、．８２が１９０℃を
検出したとき指令される制御回路によって行われる。
第２図は前記しｈ電源回路の概略図である。
低電圧電源１１から導線１２．１３がコネクター７１゜
７２を介してコイルの端子６１．６２に結線される。
導線Ｉ３では常時開のＡ接点１４と常時閉のＢ接点、１
５を備え、作業者がＡ接点１４を閉じることによってコ
イル３１．３２に通電が開始される。継手１０の凹所５
１．５２に装着された温度センサ８１，８２の温度検出
信号は変換器１６に取込まれ、この値が変換器１６内で
平均化され、あらかじめ定めた設定温度に達すると変換
器１６からＢ接点１５に信号が出力されてＢ接点が開か
れ、コイル３１．３２への通電状態が遮断される。尚溶
接完了後に継手の凹所５１．５２が残るが管２１．２２
の全周が溶接されているので漏れることがない。
以」二の様にして電気溶接した実験結果を従来の継手と
比較して次表に示す。
溶接条件 １、管および継手の口径　２５Ａ ２、電流遮断設定温度　従来技術　１００　’ＣＣ本実
何例１９０°Ｃ ３、溶接電圧　３９Ｖ 記号の区別 Ｏ・・・溶接状態良好 口・・・溶融過剰 ×・・・溶融不足 上記の表から明らがな様に本実施例では周囲環境温度や
管の寸法等の溶接条件が変化しても常に良好な溶接状態
を得ることができた。尚、上記実験の際の電流通電時間
は６０〜１２０秒であった。
本実施例では継手１０内に管２］、２２を挿入して溶接
するソケット形の例を示したが、管の外面にサドルを溶
接するタイプのサドル形溶接継手であっても本実施例と
同様である。
［発明の効果コ 以上の説明から明らかなように本発明によれば、温度セ
ンサは２つの部第４が溶接される界面部分に接して直接
に溶接部の温度を検出する様にしたので、従来のごとく
溶接時の周囲環境温度やセンサの継手凹所への挿入深さ
および溶接部の部材間の接触状態（管の外経寸法や管の
歪等）に関係なく溶接部の温度を正確に検出して電流供
給を遮断することができ、このため溶接作業時の溶接条
件に関係なく常に最適の溶接状態で溶接することができ
るものである。
【図面の簡単な説明】
第１図乃至第２図は本発明の一実施例を示し、第１図は
継手ｌＯに管２１．２２を接続する状態を示す縦断面図
、第２図は本発明を実施するのに用いる電気回路を概略
的に示す図、第３図は従来技術の継手と管の接続状態を
示す縦断面図である。

Claims (1)

  1. 【特許請求の範囲】 １）熱可塑性絶縁材料でできた２つの部材を互いにその
    面を合せて接触させ、接触面の一部に設けたコイルに電
    流を通すことによりコイルを設けた部材の溶接域が加熱
    され、該加熱によってコイルを設けた部材に隣り合う部
    材の接触面を加熱して前記２つの部材が溶接されるもの
    において、前記コイルを設けた部材の溶接域に貫通凹所
    を設け、該貫通凹所に設けた温度センサを前記コイルを
    設けた部材に隣り合う部材の接触面に当接させ、前記溶
    接域の加熱によって加熱される部材の接触面の温度を検
    出して前記コイルへの電流供給を遮断する信号を出力す
    ることを特徴とする電気溶接される継手の溶接時間制御
    方法。 ２）熱可塑性絶縁材料でできた継手の内面側に被接合部
    材を電気溶接するためのコイルを密着又は埋設し、コイ
    ルに電流を通すことによりコイルを設けた部分の材料が
    可熱される溶接域を有す継手において、前記溶接域に外
    面から内面に通じる貫通凹所を設け、該貫通凹所に温度
    センサを挿入して被接合部材の表面温度を検出するよう
    にしたことを特徴とする電気溶接される継手。
JP1130346A 1989-05-24 1989-05-24 電気溶接される継手の溶接時間制御方法および継手 Pending JPH02307727A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1130346A JPH02307727A (ja) 1989-05-24 1989-05-24 電気溶接される継手の溶接時間制御方法および継手

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1130346A JPH02307727A (ja) 1989-05-24 1989-05-24 電気溶接される継手の溶接時間制御方法および継手

Publications (1)

Publication Number Publication Date
JPH02307727A true JPH02307727A (ja) 1990-12-20

Family

ID=15032196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1130346A Pending JPH02307727A (ja) 1989-05-24 1989-05-24 電気溶接される継手の溶接時間制御方法および継手

Country Status (1)

Country Link
JP (1) JPH02307727A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7644516B2 (en) * 2004-04-21 2010-01-12 Samsung Electronics Co., Ltd. Clothes drying machine
CN111379918A (zh) * 2020-03-18 2020-07-07 高友华 一种电熔连接管件

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7644516B2 (en) * 2004-04-21 2010-01-12 Samsung Electronics Co., Ltd. Clothes drying machine
CN111379918A (zh) * 2020-03-18 2020-07-07 高友华 一种电熔连接管件
CN111379918B (zh) * 2020-03-18 2020-11-24 江苏芬茂新材料科技有限公司 一种电熔连接管件

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