JPH01198327A - High-frequency welding method - Google Patents
High-frequency welding methodInfo
- Publication number
- JPH01198327A JPH01198327A JP63024563A JP2456388A JPH01198327A JP H01198327 A JPH01198327 A JP H01198327A JP 63024563 A JP63024563 A JP 63024563A JP 2456388 A JP2456388 A JP 2456388A JP H01198327 A JPH01198327 A JP H01198327A
- Authority
- JP
- Japan
- Prior art keywords
- welded
- pair
- electrodes
- electrode plates
- frequency 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
- 238000003466 welding Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 18
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000013459 approach Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000002648 laminated material Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 abstract 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
-
- 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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/824—Actuating mechanisms
- B29C66/8242—Pneumatic or hydraulic drives
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- 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
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
- B29C66/92441—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time
- B29C66/92443—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time following a pressure-time profile
-
- 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
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
- B29C66/9292—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams
- B29C66/92921—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams in specific relation to time, e.g. pressure-time diagrams
-
- 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
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
- B29C66/92611—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools
- B29C66/92613—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools the gap being kept constant over 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
- B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
- B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
- B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は高周波溶接方法の改良に関する。本発明はたと
えば、熱可塑性樹脂などの高周波溶接に使用することが
できる。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to improvements in high frequency welding methods. The present invention can be used, for example, in high frequency welding of thermoplastic resins and the like.
［従来の技術］ ′
従来、熱可塑性樹脂などの溶接に使用される高周波溶接
方法が知られている。特公昭６２−２５４９６号公報は
、被溶接材を一対の電極板により一定の付勢力で挟圧し
つつ、まず弱い高周波電流を流して被溶接材と電極とを
なじませ、その後で強い高周波電流を流して被溶接材を
溶接し、溶接時に発生するスパークを抑止する方法を提
案している。[Prior Art] ' Conventionally, high frequency welding methods used for welding thermoplastic resins and the like have been known. Japanese Patent Publication No. 62-25496 discloses that while the material to be welded is pressed between a pair of electrode plates with a constant biasing force, a weak high-frequency current is first applied to blend the material to the electrode, and then a strong high-frequency current is applied. We are proposing a method of welding the materials by flowing the welding material and suppressing the sparks generated during welding.
［発明が解決しようとする課題］
従来の高周波溶接方法では、高周波溶接時に一対の電極
が互いに近接する方法に付勢される。このため被溶接材
が溶融しかつ圧縮されて変形し、電板間の間隔が縮小す
る。そして電極板間の間隔が縮小すると、被溶接材の単
位体積当たり加えられるエネルギー（密度）が−層多く
なり加熱が過度になりすぎ被溶接材の炭化やスパークが
発生しやす（なる。このため十分に安定した溶接を行う
ことが困難である。[Problems to be Solved by the Invention] In conventional high-frequency welding methods, a pair of electrodes are biased toward each other during high-frequency welding. Therefore, the material to be welded is melted, compressed and deformed, and the distance between the electric plates is reduced. When the distance between the electrode plates decreases, the energy (density) applied per unit volume of the material to be welded increases, resulting in excessive heating and carbonization of the material to be welded and sparks. It is difficult to perform sufficiently stable welding.
本発明は前記問題点に鑑みなされたものであって、溶接
作業時に溶接不良やスパークが発生したりしない高周波
溶接方法を提供することを目的とする。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a high-frequency welding method that does not cause welding defects or sparks during welding work.
［課題を解決するための手段］
本発明の高周波溶接方法は、積層された複数の被溶接材
を挟持する一対の電極が互いに近接する方向に、前記一
対の電極の少な（とも一方を付勢して前記一対の電極間
の間隔を調節するとともに前記間隔を固定する電極間隔
調節工程と、前記間隔を固定した状態で前記一対の電極
間に高周波電圧を印加し前記複数の被溶接材の内の少な
くとも２枚の被溶接材を互いに溶着する高周波溶接工程
と、前記高周波電圧の遮断後に前記間隔の固定を解放す
るとともに前記一対の電極が互いに近接する方向に前記
一対の電極の少なくとも一方を付勢し、前記複数の被溶
接材を挟圧するとともに前記被溶接材を冷却する加圧冷
却工程と、からなる。[Means for Solving the Problems] The high-frequency welding method of the present invention is characterized in that a pair of electrodes that sandwich a plurality of laminated materials to be welded approaches each other in a direction in which one of the electrodes is energized. an electrode spacing adjustment step of adjusting the spacing between the pair of electrodes and fixing the spacing; and applying a high frequency voltage between the pair of electrodes with the spacing fixed, a high-frequency welding step of welding at least two pieces of welded materials to each other; and after cutting off the high-frequency voltage, the fixing of the gap is released and at least one of the pair of electrodes is attached in a direction in which the pair of electrodes approaches each other. and a pressurized cooling step of compressing the plurality of welded materials and cooling the welded materials.
「作用」
本発明の高周波溶接方法では、高周波電流を通電する時
に、一対の電極間の間隔を一定に固定している。前記電
極間間隔の固定により、被溶接材が溶融してその耐圧力
が低下しても電極間隙は変化しない。そのため従来方法
にみられる電極間隔の縮小に伴う発熱の増加やスパーク
は生じない。"Function" In the high frequency welding method of the present invention, the distance between the pair of electrodes is fixed constant when high frequency current is applied. By fixing the gap between the electrodes, the gap between the electrodes does not change even if the material to be welded melts and its withstand pressure decreases. Therefore, no increase in heat generation or sparks occur due to the reduction in the electrode spacing that occurs in conventional methods.
また、本発明の高周波溶接方法では、高周波電流を遮断
した後で再び電極により被溶接材を挟圧して冷却してい
る。前記挟圧により、被溶接材の溶融部は所定の付勢力
で加圧され溶接材料間に介在する空気を排除し、互いに
確実に接触した状態で冷却され、被溶接材の溶融部は確
実に固化される。Further, in the high frequency welding method of the present invention, after the high frequency current is cut off, the material to be welded is again compressed by the electrodes and cooled. Due to the above-mentioned clamping pressure, the molten part of the welded material is pressurized with a predetermined biasing force, eliminates the air interposed between the welding materials, and is cooled in a state where they are in reliable contact with each other, so that the molten part of the welded material is reliably solidified.
［実施例〕
本発明の高周波溶接方法を使用する高周波溶接装置の一
実施例を第１図に示す。[Example] FIG. 1 shows an example of a high-frequency welding apparatus using the high-frequency welding method of the present invention.
本高周波溶接装置は、基部１と、被溶接材１００を挟持
する前記一対の電極としての一対の電極板２．３と、電
極板２を移動させる駆動装置４とからなる。This high-frequency welding apparatus includes a base 1, a pair of electrode plates 2.3 as the pair of electrodes that sandwich the workpiece 100, and a drive device 4 for moving the electrode plates 2.
基部１は、水平面１１をもつ鋼製ベツドである。The base 1 is a steel bed with a horizontal surface 11.
電極板３は、基部１の水平面１１に当接する平坦面３１
と、平坦面３１と平行であり被溶接材１００を載置する
載置面３２とをもつ銅製電極であり、基部１に固定され
ている。The electrode plate 3 has a flat surface 31 that comes into contact with the horizontal surface 11 of the base 1.
and a mounting surface 32 parallel to a flat surface 31 on which the workpiece 100 to be welded is placed, and is fixed to the base 1.
駆動装置４は、基部１に固定された油圧シリンダー４１
と、油圧シリンダー４１の近傍に設置され配管４０によ
り油圧シリンダー４１に接続された油圧装置４２とから
なる。油圧シリンダー４１は垂直方向に往復可能なピス
トン４１１をもち、ピストン４１１の先端には、作動板
４１２が取付けられている。油圧装置４２は配管４０に
より油圧シリンダー４１に接続されたセンタークロス３
ポジシヨンの油圧電磁弁４３と、油圧タンク４４と、油
圧タンク４４と油圧電磁弁４３とを接続する油圧ポンプ
４５及び配管４６と、からなる。The drive device 4 includes a hydraulic cylinder 41 fixed to the base 1.
and a hydraulic device 42 installed near the hydraulic cylinder 41 and connected to the hydraulic cylinder 41 via piping 40. The hydraulic cylinder 41 has a piston 411 that can reciprocate in the vertical direction, and an actuation plate 412 is attached to the tip of the piston 411. A hydraulic device 42 is connected to a center cross 3 connected to a hydraulic cylinder 41 by a pipe 40.
It consists of a position hydraulic solenoid valve 43, a hydraulic tank 44, a hydraulic pump 45 and piping 46 that connect the hydraulic tank 44 and the hydraulic solenoid valve 43.
電極板２は、油圧シリンダー４１の作動板４１２に固定
され、電極板３の載置面３２と対向する平坦な抑圧面２
１をもつ銅製電極である。電極板２は第１図に示すよう
に、電極板３とともに被溶接ｖＪ１００を挟持している
。The electrode plate 2 is fixed to the actuation plate 412 of the hydraulic cylinder 41 and has a flat suppression surface 2 facing the mounting surface 32 of the electrode plate 3.
It is a copper electrode with 1. As shown in FIG. 1, the electrode plate 2 and the electrode plate 3 sandwich the welded vJ100.
被溶接材１００は、電極板３の載置面３２上に載置され
た厚さ３ｍｍの木質基材１０１と、木質基材１０１の一
面に接着剤１０４で接着された厚さ６ｍｍの布１０２と
、布１０２の木質基材１０１と反対側の面に当接して配
置された厚さ３ｍｍの塩化ビニール１０３と、からなる
。The material to be welded 100 includes a wooden base material 101 with a thickness of 3 mm placed on the mounting surface 32 of the electrode plate 3, and a cloth 102 with a thickness of 6 mm adhered to one side of the wooden base material 101 with an adhesive 104. and a 3 mm thick vinyl chloride 103 placed in contact with the surface of the cloth 102 opposite to the wood base material 101.
第１図は、塩化ビニール１０３の布１０２と反対側の面
が電極板２の抑圧面２１により電極板３の方向に押圧さ
れた状態を示す。FIG. 1 shows a state in which the surface of the vinyl chloride 103 opposite to the cloth 102 is pressed in the direction of the electrode plate 3 by the suppressing surface 21 of the electrode plate 2. As shown in FIG.
本発明の高周波溶接方法を第２図により説明する。The high frequency welding method of the present invention will be explained with reference to FIG.
まず時刻１０に、油圧ポンプ４５を駆動し、油圧電磁弁
４３を制御し、Ｘ方向に油圧シリンダー４１のピストン
４１１で加圧する。その結果電極板２は被溶接材１００
を付勢力Ｐ１ （＝０．２ｋ（１／ｍｍ）で加圧し、被
溶接材１００の厚さ、即ち電極板２と電極板３との間の
間隔ｄは縮小する。この時、塩化ビニール１０３の厚さ
は２．３ｍｍ、布−６＝
１０２の厚さは２．２ｍｍとなり、木質基材１１１の厚
さは３ｍｍのままである。First, at time 10, the hydraulic pump 45 is driven, the hydraulic solenoid valve 43 is controlled, and the piston 411 of the hydraulic cylinder 41 pressurizes in the X direction. As a result, the electrode plate 2 is the material to be welded 100
is applied with an urging force P1 (=0.2k (1/mm)), and the thickness of the material to be welded 100, that is, the distance d between the electrode plate 2 and the electrode plate 3 is reduced.At this time, the vinyl chloride 103 The thickness of the cloth-6=102 is 2.2 mm, and the thickness of the wooden base material 111 remains 3 mm.
期間Ｔｏだけ前記加圧を実施した後で、油圧電磁弁４３
をセンターポジションにしてピストン４１１を固定し、
その後で高周波電源（図示せず）から一対の電極板２．
３間に高周波電流１１（＝０．３ｍＡ）を通電して被溶
接材１００の予備加熱を実施し、その後高周波電流Ｉ２
（＝０．６ｍＡ）を通電して被溶接材１００の本加熱
を実施する。その結果、塩化ビニール１０３が溶融する
。After carrying out the pressurization for the period To, the hydraulic solenoid valve 43
to the center position and fix the piston 411,
After that, a pair of electrode plates 2.
The material to be welded 100 is preheated by passing a high frequency current 11 (=0.3 mA) between 3, and then a high frequency current 11 (=0.3 mA) is applied between
(=0.6 mA) is applied to carry out main heating of the material to be welded 100. As a result, vinyl chloride 103 melts.
電極板２の付勢力Ｐは塩化ビニール１０３の溶融により
Ｐ２まで低下する。The biasing force P of the electrode plate 2 decreases to P2 due to the melting of the vinyl chloride 103.
期間Ｔ１だけ前記通電を実施した後で、通電を停止し、
その後で再度油圧電磁弁４３を制御し、Ｘ方向に油圧シ
リンダー４１のピストン４１１で再度加圧する。その結
果電極板２は被溶接材１００を挟圧し、被溶接材１００
の厚さ、即ち電極板２と電極板３との間の間隔ｄは縮小
する。そして塩化ビニール１０’３と布１０２は互いに
挟圧されて圧接される。その後被溶接材１００は加圧力
Ｐ−７“−
１で加圧されつつ冷却される。After carrying out the energization for a period T1, the energization is stopped,
Thereafter, the hydraulic solenoid valve 43 is controlled again, and the piston 411 of the hydraulic cylinder 41 is pressurized again in the X direction. As a result, the electrode plate 2 pinches the material to be welded 100, and the material to be welded 100
The thickness, ie the distance d between the electrode plates 2 and 3, decreases. Then, the vinyl chloride 10'3 and the cloth 102 are pressed and pressed together. Thereafter, the material to be welded 100 is cooled while being pressurized with a pressure of P-7"-1.
期間Ｔ２だけ前記加圧冷却を実施した後で、油圧電磁弁
４３を切換え、ピストン４１１をＸ方向と逆方向に作動
させ、被溶接材１００を取出す。After performing the pressurized cooling for a period T2, the hydraulic solenoid valve 43 is switched, the piston 411 is operated in the opposite direction to the X direction, and the workpiece 100 to be welded is taken out.
なお、期間Ｔｏの付勢力と期間Ｔ２の付勢力とは等しく
てもよく異なっていてもよい。駆動装置４は通電時に電
極板２を静止可能であれば、油圧装置以外のもの、たと
えばロック機構をもつ空圧装置などでもよい。ただ、本
実施例に使用した油圧シリンダー装置は非圧縮性媒体を
使用するので前記付勢力の変動にも関らず、間隔ｄを確
実に固定するとができる。Note that the biasing force in the period To and the biasing force in the period T2 may be equal or different. The drive device 4 may be a device other than a hydraulic device, such as a pneumatic device with a locking mechanism, as long as it can hold the electrode plate 2 still when energized. However, since the hydraulic cylinder device used in this embodiment uses an incompressible medium, the distance d can be reliably fixed despite fluctuations in the biasing force.
［発明の効果］
前記説明したように本発明の高周波溶接方法は、高周波
溶接時に一対の電極板間の間隔を一定に固定しているの
で、被溶接材の溶融時の電極間間隔の縮小を防止できる
。そして電極間間隔の縮小に伴う発熱やスパークの増加
を防止することができ更に、従来の高周波溶接方法では
前記電極間間隔の縮小に伴い、被溶接材内部の最高温度
点が変動するが、本発明の高周波溶接方法では前記最高
温度点（加熱中心）の変動を防止でき、たとえば過度の
加熱を嫌う部位に最高温度点が移動することを防止でき
る。[Effects of the Invention] As explained above, in the high frequency welding method of the present invention, the distance between the pair of electrode plates is fixed at a constant value during high frequency welding, so the distance between the electrodes can be reduced when the material to be welded is melted. It can be prevented. In addition, in the conventional high-frequency welding method, the maximum temperature point inside the material to be welded fluctuates as the inter-electrode spacing decreases, but this method The high-frequency welding method of the invention can prevent fluctuations in the maximum temperature point (heating center), and can prevent the maximum temperature point from moving to a region where excessive heating is averse, for example.
【図面の簡単な説明】
第１図は本発明の高周波溶接方法を実施する高周波溶接
装置の模式図である。第２図は第１図の装置の運転時に
おける電極板間隔ｄと付勢力Ｐと高周波電流Ｉどの時間
変化を示す状態図である。
特許出願人 トヨタ自動車株式会社
同 荒川車体工業株式会社BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a high-frequency welding apparatus for carrying out the high-frequency welding method of the present invention. FIG. 2 is a state diagram showing temporal changes in the electrode plate spacing d, biasing force P, and high-frequency current I during operation of the apparatus shown in FIG. Patent applicant Toyota Motor Corporation Arakawa Auto Body Industry Co., Ltd.
Claims (1)
が互いに近接する方向に、前記一対の電極の少なくとも
一方を付勢して前記一対の電極間の間隔を調節するとと
もに前記間隔を固定する電極間隔調節工程と、 前記間隔を固定した状態で前記一対の電極間に高周波電
圧を印加し前記複数の被溶接材の内の少なくとも２枚の
被溶接材を互いに溶着する高周波溶接工程と、 前記高周波電圧の遮断後に前記間隔の固定を解放すると
ともに前記一対の電極が互いに近接する方向に前記一対
の電極の少なくとも一方を付勢し、前記複数の被溶接材
を挟圧するとともに前記被溶接材を冷却する加圧冷却工
程と、からなることを特徴とする高周波溶接方法。(1) At least one of the pair of electrodes is energized in a direction in which the pair of electrodes sandwiching a plurality of laminated materials to be welded approach each other, and the distance between the pair of electrodes is adjusted, and the distance is a high-frequency welding step of applying a high-frequency voltage between the pair of electrodes with the distance fixed, and welding at least two of the plurality of welded materials to each other; , After the high-frequency voltage is cut off, the fixing of the interval is released, and at least one of the pair of electrodes is biased in a direction in which the pair of electrodes approaches each other, thereby pinching the plurality of welded materials and pressing the plurality of welded materials. A high-frequency welding method characterized by comprising a pressurized cooling process to cool the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63024563A JPH01198327A (en) | 1988-02-04 | 1988-02-04 | High-frequency welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63024563A JPH01198327A (en) | 1988-02-04 | 1988-02-04 | High-frequency welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01198327A true JPH01198327A (en) | 1989-08-09 |
Family
ID=12141623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63024563A Pending JPH01198327A (en) | 1988-02-04 | 1988-02-04 | High-frequency welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01198327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0945247A3 (en) * | 1998-03-25 | 2001-04-11 | Idemitsu Petrochemical Co., Ltd. | Sealing of polyolefin-based resin, and sealed article of the resin |
-
1988
- 1988-02-04 JP JP63024563A patent/JPH01198327A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0945247A3 (en) * | 1998-03-25 | 2001-04-11 | Idemitsu Petrochemical Co., Ltd. | Sealing of polyolefin-based resin, and sealed article of the resin |
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