FR2600008A2 - Device for controlling soldering (welding) time - Google Patents

Device for controlling soldering (welding) time Download PDF

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Publication number
FR2600008A2
FR2600008A2 FR8608822A FR8608822A FR2600008A2 FR 2600008 A2 FR2600008 A2 FR 2600008A2 FR 8608822 A FR8608822 A FR 8608822A FR 8608822 A FR8608822 A FR 8608822A FR 2600008 A2 FR2600008 A2 FR 2600008A2
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France
Prior art keywords
welding
well
sensor
expansion
receiver
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Granted
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FR8608822A
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French (fr)
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FR2600008B2 (en
Inventor
Gerard Grandclement
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Innovation Generale SAM INNOGE
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Innovation Generale SAM INNOGE
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Priority claimed from FR8320429A external-priority patent/FR2555936B1/en
Application filed by Innovation Generale SAM INNOGE filed Critical Innovation Generale SAM INNOGE
Priority to FR8608822A priority Critical patent/FR2600008B2/en
Publication of FR2600008A2 publication Critical patent/FR2600008A2/en
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Publication of FR2600008B2 publication Critical patent/FR2600008B2/en
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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
    • 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
    • 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
    • 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
    • B29C66/70—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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/87—Auxiliary operations or devices
    • B29C66/872—Starting or stopping procedures
    • 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
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/922—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 measuring the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9221—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 measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power
    • B29C66/92211—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 measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power with special measurement means or methods
    • 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
    • B29C66/97—Checking completion of joining or correct joining by using indications on at least one of the joined parts
    • B29C66/972—Checking completion of joining or correct joining by using indications on at least one of the joined parts by extrusion of molten material
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
    • G05D23/27535—Details of the sensing element
    • G05D23/27543—Details of the sensing element using the controlled element as sensing element
    • 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

Abstract

Device according to Claim 4 of the main patent, characterised in that it consists of a light-emitter/light-receiver pair placed in a well in which the material of the sleeve is expanded during soldering (welding), the binary signal emitted by this pair being inverted by the arrival of the material under the effect of this expansion, and triggering the stoppage of the supply to the electrical soldering (welding) coil.

Description

La Déposante a décrit au Brevet Principal un procédé et un dispositif pour le contrôle du temps de soudage d'un raccord électrosoudable avec deux tubes à assembler en matière thermoplastique, par captage des variations de l'une des propriétés intrinsèques de la matière à souder, liées à son ramollissement et résultant de sa température, de manière que; au moment où la soudure est achevée, la valeur correspondante de cette propriété soit utilisée comme information transmise par le capteur pour commander la coupure du courant de soudage. The Applicant described in the Main Patent a method and a device for controlling the welding time of an electrofusion fitting with two tubes to be assembled in thermoplastic material, by capturing variations in one of the intrinsic properties of the material to be welded, related to its softening and resulting from its temperature, so that; when the welding is finished, the corresponding value of this property is used as information transmitted by the sensor to control the breaking of the welding current.

Dans la pratique, la propriété dont les variations sont les plus nettes et par suite les plus sensibles et commodes à capter est le volume de la matière, l'information transmise étant alors le degré de dilatation de la matière correspondant à la durée optimale pendant laquelle la matière a été ramollie en vue de son soudage. In practice, the property whose variations are the clearest and therefore the most sensitive and convenient to capture is the volume of the material, the information transmitted then being the degree of expansion of the material corresponding to the optimal duration during which the material has been softened for welding.

Le Brevet Principal a mentionné en particulier un moyen pour capter ces variations de volume, ce moyen étant un microinterrupteur placé dans un puit dans lequel s'élève la matière en fusion, au niveau correspondant à ladite variation optimale. The Main Patent mentioned in particular a means for capturing these variations in volume, this means being a microswitch placed in a well in which the molten material rises, at the level corresponding to said optimal variation.

Le présent Certificat d'Addition vise d'autres systèmes de mesure des mêmes variations de volume, leur captage s'effectuant également dans un puits d'expansion de la matière en fusion. This Addition Certificate covers other systems for measuring the same volume variations, their collection also taking place in an expansion well of the molten material.

Selon l'invention, un premier système consiste en un couple émetteur-écepteur de lumière dont le signal binaire est inversé (présence/absence) par l'arrivée de matière, sous l'effet de sa dilatation. According to the invention, a first system consists of a light emitter-receiver couple whose binary signal is reversed (presence / absence) by the arrival of material, under the effect of its expansion.

Un tel couple peut être disposé de part et d'autre d'une zone dans laquelle parvient la matière dilatée, ou bien aux deux extrémités d'un trajet optique comportant au moins une réflexion totale qui disparait à l'arrivée de la matière sur le-point de réflexion. Such a couple can be placed on either side of an area into which the expanded material arrives, or else at the two ends of an optical path comprising at least one total reflection which disappears when the material arrives on the - point of reflection.

Un autre système selon l'invention consiste à capter la pression exercée par la matière en expansion thermique sur une jauge de contrainte. Another system according to the invention consists in capturing the pressure exerted by the thermal expanding material on a strain gauge.

Un autre système selon l'invention consiste à utiliser un capteur à effet capacitif ou inductif révélant par simple contact la présence de la matière quand celle-ci atteint le volume prévu. Another system according to the invention consists in using a capacitive or inductive effect sensor revealing by simple contact the presence of the material when the latter reaches the expected volume.

On notera que tous les capteurs utilisés dans les systèmes ci-déssus existent dans le commerce. Leur signal de sortie est transformé électroniquement de façon connue en un signal binaire suffisamment puissant pour commander la coupure du courant. Note that all the sensors used in the above systems exist commercially. Their output signal is electronically transformed in a known manner into a binary signal sufficiently powerful to control the breaking of the current.

On va illustrer ci-après certains de ces différents systèmes en se référant au dessin annexé sur lequel
La figure 1 représente schématiquement un capteur optique à faisceau direct et,
La figure 2 représente un capteur optique à faisceau réfléchi.We will illustrate below some of these different systems with reference to the accompanying drawing on which
FIG. 1 diagrammatically represents a direct beam optical sensor and,
FIG. 2 represents an optical sensor with a reflected beam.

Si l'on se reporte tout d'abord à la figure 1, on y a représenté partiellement et schématiquement un manchon 1 dans la paroi duquel est noyé un enroulement électrique 2, alimenté å chacune de ces extrémités par une broche 3 destinée à être connectée à la source de courant électrique. If we refer first to Figure 1, there is shown partially and schematically a sleeve 1 in the wall of which is embedded an electrical winding 2, supplied at each of these ends by a pin 3 intended to be connected at the source of electric current.

Selon l'invention, un puits vertical 4 est ménagé radialement à la surface externe du manchon 2, ses parois étant transparentes, et la partie interne étant creuse. De chaque côté de ce puits vertical sont disposés un émetteur-optique 5 et un récepteur-optique 6. réunis par des connecteurs 7 à un système électronique capable de détecter s'il y a ou non transmission du faisceau lumineux émis par 5 jusqu'au récepteur 6. According to the invention, a vertical well 4 is formed radially on the external surface of the sleeve 2, its walls being transparent, and the internal part being hollow. On each side of this vertical well are arranged an optical transmitter 5 and an optical receiver 6. joined by connectors 7 to an electronic system capable of detecting whether or not there is transmission of the light beam emitted by 5 until receiver 6.

Quand ce signal lumineux traverse les parois transparentes du puits 4 à l'intérieur duquel il n'y a que de l'air, les connecteurs 7 indiquent par leur signal l'absence de matière à l'intérieur du puits 4. When this light signal passes through the transparent walls of the well 4 inside which there is only air, the connectors 7 indicate by their signal the absence of material inside the well 4.

Quand, sous l'effet de l'échauffement provoqué par l'enroulement 2, la matière du manchon 1 se ramollit et se dilate, cette matière s'élève dans le puits 4 et, quand elle atteint un niveau suffisant, elle intercepte le faisceau lumineux émis de 5 vers 6. When, under the effect of the heating caused by the winding 2, the material of the sleeve 1 softens and expands, this material rises in the well 4 and, when it reaches a sufficient level, it intercepts the beam light emitted from 5 to 6.

Les connecteurs 7 détectént alors la présence de matière, de sorte que le signal recueilli est l'inverse du signal quand il n'y a pas de matière. The connectors 7 then detect the presence of material, so that the signal collected is the reverse of the signal when there is no material.

C'est cette différence entre absence et présence de matière qui est utilisée pour commander, après amplification électronique, le système d'alimentation en courant de l'enroulement 2. It is this difference between absence and presence of material which is used to control, after electronic amplification, the current supply system of winding 2.

Si l'on se réfère maintenant à la figure 2, on voit que, de la même manière, un puits 8 est ménagé radialement sur la face externe du manchon 1, de manière que la matière de ce manchon, échauffée par l'enroulement 2, se ramollisse et se dilate à l'intérieur de ce puits 8. If we now refer to FIG. 2, we see that, in the same way, a well 8 is formed radially on the external face of the sleeve 1, so that the material of this sleeve, heated by the winding 2 , softens and expands inside this well 8.

Dans ce puits 8 est logé un prisme à réflexion totale 9, de préférence en matière thermo-plastique transparente, par exemple en polycarbonate, matériau relativement peu sensible aux températures intervenant dans le processus. In this well 8 is housed a prism with total reflection 9, preferably made of transparent thermo-plastic material, for example polycarbonate, a material relatively insensitive to the temperatures involved in the process.

A l'extérieur de ce prisme sont montés un émetteur lumineux 10 et un récepteur lumineux 11, l'émetteur 10 envoyant un faisceau vers la face inférieure du prisme 9, ce faisceau se réfléchissant doublement, une première fois au point 12, une seconde fois au point 13, pour revenir sur le récepteur 11. Outside this prism are mounted a light emitter 10 and a light receiver 11, the emitter 10 sending a beam towards the underside of the prism 9, this beam reflecting twice, a first time at point 12, a second time in point 13, to return to the receiver 11.

De la même manière que sur la figure 1, le couple 10-11 est connecté par 7 à un système d'analyse des signaux reçus. In the same way as in FIG. 1, the pair 10-11 is connected by 7 to a system for analyzing the received signals.

Quand le puits 8 n'est remplit que d'air, le faisceau lumineux suit donc le trajet 10-12-13-11, de sorte que le détecteur analyse le signal comme ne révélant pas la présence de matière dans le puits 8. When the well 8 is only filled with air, the light beam therefore follows the path 10-12-13-11, so that the detector analyzes the signal as not revealing the presence of material in the well 8.

Quand, sous l'effet de l'échauffement, la matière du manchon 1 s'élève dans le puits 8 et vient au contact des deux faces du prisme 9, le changement du coefficient de réfraction au contact des parois du prisme est tel que la lumière est absorbée par la matière du manchon 1, de sorte qu'il n'y a plus réflexion en 12 et en 13. When, under the effect of heating, the material of the sleeve 1 rises in the well 8 and comes into contact with the two faces of the prism 9, the change in the coefficient of refraction in contact with the walls of the prism is such that the light is absorbed by the material of the sleeve 1, so that there is no longer reflection at 12 and 13.

Le faisceau provenant de l'émetteur 10 ne parvient donc plus au récepteur 11, de sorte que le détecteur alimenté par les connecteurs 7 analyse le signal comme révélant la présence de la matière dans le puits 8, ce qui indique que le soudage est achevé, et commande alors l'arrêt de l'alimentation de l'enroulement 2
On constate ainsi que dans les deux cas, la variation du volume de la matière du raccord a été captée par un système optique qui lui-même a commandé l'arrêt de l'alimentation de l'enroulement d'un réchauffement du manchon 1.The beam from the emitter 10 therefore no longer reaches the receiver 11, so that the detector supplied by the connectors 7 analyzes the signal as revealing the presence of the material in the well 8, which indicates that the welding is completed, and then controls the stopping of the supply of the winding 2
It can thus be seen that in both cases, the variation in the volume of the material of the fitting was picked up by an optical system which itself controlled the stopping of the supply to the winding of a heating of the sleeve 1.

L'invention porte, comme il a été indiqué précédemment, sur des moyens électroniques de détection des variations du volume du manchon 1.  The invention relates, as indicated above, to electronic means for detecting variations in the volume of the sleeve 1.

Dans le premier système envisagé, un capteur de pression du type "jauge de contrainte" (strain gauge), placé à la surface inférieur du capteur placé dans un puits tel que 4 ou 8, lie la pression résultant de l'expansion de la matière dans ce puits. In the first system considered, a strain gauge pressure sensor, placed on the bottom surface of the sensor placed in a well such as 4 or 8, links the pressure resulting from the expansion of the material in this well.

Cette pression est suffisamment élevée en fin de soudage, de l'ordre d'environ 1 Bar,pour qu'elle soit détectée par cette jauge, et analysée comme révélant la présence de la matière expansée dans le puits, c'est-à-dire indiquant que le temps de soudage voulu s'est écoulé. This pressure is sufficiently high at the end of welding, of the order of approximately 1 Bar, for it to be detected by this gauge, and analyzed as revealing the presence of the expanded material in the well, that is to say say that the desired welding time has elapsed.

De même, au lieu d'une pression, la simple présence de la matière peut être captée, par un capteur dit de présence, à effet capacitif ou inductif, donnant un signal électronique différent selon que sa surface est en contact avec l'air, avant le soudage, ou avec la matière, quand celle-ci, par extension, est montée dans le puits où est placé le capteur. Similarly, instead of pressure, the simple presence of the material can be detected by a so-called presence sensor, with a capacitive or inductive effect, giving a different electronic signal depending on whether its surface is in contact with air, before welding, or with the material, when the latter, by extension, is mounted in the well where the sensor is placed.

Dans ce cas également, le signal transmis par le capteur est utilisé pour commander l'arrêt de l'alimentation de l'enroulement 2.  In this case also, the signal transmitted by the sensor is used to control the stopping of the supply of winding 2.

Claims (5)

REVENDICATIONS 1. Dispositif selon la revendication 4 du brevet principal, caractérisé en ce qu'il consiste en un couple émetteur-récepteur de lumière, placé dans un puits dans lequel vient s'expanser la matière du manchon en cours de soudage, le signal binaire émis par ce couple étant inversé par l'arrivée de la matière sous l'effet de cette expansion, et déclenchant l'arrêt de l'alimentation de l'enroulement électrique de soudage.1. Device according to claim 4 of the main patent, characterized in that it consists of a light emitter-receiver couple, placed in a well in which the material of the sleeve expands during welding, the binary signal emitted by this torque being reversed by the arrival of the material under the effect of this expansion, and triggering the stopping of the supply of the electric welding winding. 2. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte un puits destiné à être rempli par'la matière dilatée, et de part et d'autre duquel sont disposés l'émetteur et les récepteurs de lumière.2. Device according to claim 1, characterized in that it comprises a well intended to be filled par'la expanded material, and on either side of which are arranged the light emitter and receivers. 3. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte un prisme à double réflexion totale, l'arrivée de la matière au contact de ce prisme faisant cesser cette réflexion, et interrompant ainsi le faisceau lumineux entre l'émetteur et le récepteur. 3. Device according to claim 1, characterized in that it comprises a prism with double total reflection, the arrival of the material in contact with this prism causing this reflection to cease, and thus interrupting the light beam between the emitter and the receiver. 4. Dispositif selon la revendication 1, caractérisé en ce que le capteur est un capteur de pression, transformant la pression exercée par la matière au moment de son expansion en un signal utilisé pour commander l'arrêt de l'alimentation en courant de soudage.4. Device according to claim 1, characterized in that the sensor is a pressure sensor, transforming the pressure exerted by the material at the time of its expansion into a signal used to control the stopping of the welding current supply. 5. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte un capteur à effet capacitif ou inductif, révélant par simple contact la présence de la matière quand celle-ci a atteint le volume correspondant à la fin du soudage. 5. Device according to claim 1, characterized in that it comprises a capacitive or inductive effect sensor, revealing by simple contact the presence of the material when it has reached the volume corresponding to the end of welding.
FR8608822A 1983-12-19 1986-06-16 DEVICE FOR MONITORING THE WELDING TIME Expired FR2600008B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8608822A FR2600008B2 (en) 1983-12-19 1986-06-16 DEVICE FOR MONITORING THE WELDING TIME

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8320429A FR2555936B1 (en) 1983-12-19 1983-12-19 METHOD FOR CONTROLLING THE WELDING TIME
FR8608822A FR2600008B2 (en) 1983-12-19 1986-06-16 DEVICE FOR MONITORING THE WELDING TIME

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FR2600008A2 true FR2600008A2 (en) 1987-12-18
FR2600008B2 FR2600008B2 (en) 1988-08-19

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB407310A (en) * 1932-06-10 1934-03-15 Standard Telephones Cables Ltd Improvements in thermostatic apparatus
GB1002701A (en) * 1962-10-03 1965-08-25 Robert Roy Schlaich Electric controller
FR2497916A1 (en) * 1976-03-22 1982-07-16 Sturm Werner THERMOPLASTIC WELDING SLEEVE
EP0149410A2 (en) * 1983-12-19 1985-07-24 INNOVATION GENERALE en abrégé "INNOGE" Method of controlling welding time

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB407310A (en) * 1932-06-10 1934-03-15 Standard Telephones Cables Ltd Improvements in thermostatic apparatus
GB1002701A (en) * 1962-10-03 1965-08-25 Robert Roy Schlaich Electric controller
FR2497916A1 (en) * 1976-03-22 1982-07-16 Sturm Werner THERMOPLASTIC WELDING SLEEVE
EP0149410A2 (en) * 1983-12-19 1985-07-24 INNOVATION GENERALE en abrégé "INNOGE" Method of controlling welding time

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