FR2983768A1 - Clamping fitting for assembling device of transparent upper part and absorbent lower part of car, has clamping accessory made of material resistant to force applied to upper surface and to friction generated by displacement of accessory - Google Patents

Clamping fitting for assembling device of transparent upper part and absorbent lower part of car, has clamping accessory made of material resistant to force applied to upper surface and to friction generated by displacement of accessory Download PDF

Info

Publication number
FR2983768A1
FR2983768A1 FR1161322A FR1161322A FR2983768A1 FR 2983768 A1 FR2983768 A1 FR 2983768A1 FR 1161322 A FR1161322 A FR 1161322A FR 1161322 A FR1161322 A FR 1161322A FR 2983768 A1 FR2983768 A1 FR 2983768A1
Authority
FR
France
Prior art keywords
clamping
accessory
tip
cylinder
diameter
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
Application number
FR1161322A
Other languages
French (fr)
Other versions
FR2983768B1 (en
Inventor
Jean-Gilles Kerbiguet
Herve Guermeur
Lucio Tirado
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Priority to FR1161322A priority Critical patent/FR2983768B1/en
Publication of FR2983768A1 publication Critical patent/FR2983768A1/en
Application granted granted Critical
Publication of FR2983768B1 publication Critical patent/FR2983768B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one 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
    • B29C66/01—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
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • 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
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B29C66/81812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws the welding jaws being cooled from the outside, e.g. by blowing a gas or spraying a liquid
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B29K2995/0027—Transparent for light outside the visible spectrum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Laser Beam Processing (AREA)

Abstract

The fitting (10) has a removable clamping accessory (13) installed at an end of the fitting according to characteristics of material of a transparent upper part (11). The accessory is made of a material transparent to a laser beam (F) and resistant to a force applied to an upper surface (11a) of the upper part and to a friction generated by a displacement of the accessory on the upper surface of the upper part. The accessory comprises a holding portion associated with the fitting and another application portion applying a preset force against an upper surface of the upper part. The clamping accessory is made of transparent material e.g. glass, quartz and sapphire, plastic material or thermoplastic material.

Description

Embout de bridage équipé d'un accessoire de bridage pour un dispositif d'assemblage deux pièces par soudage laser par transparence et procédé de remplacement d'un tel accessoire 10 Domaine technique de l'invention 15 L'invention concerne un embout de bridage d'un dispositif d'assemblage de deux pièces par soudage laser par transparence, une première pièce supérieure transparente étant positionnée sur une seconde pièce inférieure absorbante, le dispositif d'assemblage comportant un moyen de projection d'un faisceau laser sur la surface supérieure de ladite pièce supérieure et l'embout 20 de bridage étant destiné à exercer un effort prédéterminé contre la surface supérieure de ladite pièce supérieure. L'invention concerne plus particulièrement l'amélioration d'un embout de bridage comme décrit dans la demande de brevet WO 2011/138568 de la 25 Demanderesse, apte à rendre l'utilisation d'un tel embout de bridage plus flexible selon le type de matériaux des pièces destinées à être assemblées par soudage laser par transparence. L'invention concerne également un procédé de remplacement d'un 30 accessoire de bridage équipant un tel embout de bridage. Clamping tip equipped with a clamping accessory for a two-piece assembly device by transparent laser welding and method for replacing such an accessory Technical field of the invention The invention relates to a clamping endpiece a device for assembling two parts by laser welding by transparency, a first transparent upper part being positioned on a second absorbent bottom part, the assembly device comprising means for projecting a laser beam on the upper surface of said part upper and the clamping end 20 being intended to exert a predetermined force against the upper surface of said upper part. The invention relates more particularly to the improvement of a clamping tip as described in the patent application WO 2011/138568 of the Applicant, able to make the use of such a clamping tip more flexible depending on the type of clamp. materials of parts intended to be assembled by laser welding by transparency. The invention also relates to a method of replacing a clamping accessory equipping such a clamping tip.

Etat de la technique Comme représenté sur la figure 1, dans la demande de brevet WO 2011/138568 de la Demanderesse, il est connu un embout de bridage 1 d'un dispositif de soudage laser par transparence pour deux pièces 2, 3 à assembler. Une première pièce supérieure 2, transparente à un faisceau laser F, est positionnée sur une seconde pièce inférieure 3 absorbante. L'embout de bridage 1, au coeur duquel le faisceau laser F est destiné à être projeté, exerce un effort prédéterminé contre la surface supérieure 2a de la pièce supérieure 2, de sorte à effectuer un bridage des pièces 2, 3 l'une contre l'autre, afin d'assurer un accostage suffisant pour effectuer une bonne soudure. La pièce supérieure 12 transparente au faisceau laser F doit être suffisamment rigide afin de permettre le déplacement de l'embout de bridage le long de l'interface de soudage des deux pièces, c'est-à-dire au niveau de l'ensemble des zones où les pièces sont destinées à être assemblées (comme décrit dans la demande de brevet de la Demanderesse WO 2011/138568). Toutefois, même si cette solution s'avère très efficace, elle ne permet pas de brider et de souder correctement n'importe quel type de matériau de pièces, notamment des pièces en matériaux polymères non structurelles, c'est- à-dire non chargées en fibres et donc plus tendres, ou « molles ». De même, un tel embout de bridage ne permet pas un bridage homogène sur ces types de matériaux, plus particulièrement lors du déplacement de l'embout de bridage le long de l'interface de soudage. Il peut en résulter l'apparition d'un bourrelet lors du déplacement de l'embout de bridage et un marquage de la pièce supérieure, par exemple du type creux, ce qui donne un effet néfaste à la qualité de la soudure. Pour résoudre ce problème, il est déjà connu des techniques de bridage par billes transparentes, aptes à rouler sur la surface supérieure de la pièce supérieure lors de l'assemblage par soudage laser, comme décrit notamment dans les documents EP 1 440 784 et JP 2005 081396. De telles billes transparentes permettent de ne pas marquer la surface supérieure de la pièce supérieure, tout en étant transparentes au faisceau laser F. Toutefois, une telle solution présente de fortes contraintes et de fortes limites techniques, notamment en termes d'encombrement au niveau de l'interface de soudage, de tel dispositif à billes nécessitant une importante largeur de feuillure des pièces à souder. De même, de telles techniques ne sont pas très flexibles, la zone de contact de la bille sur la pièce dépendant fortement du diamètre de la bille, avec un impact fort sur le design du produit qui peut être assemblé avec ces solutions techniques. En d'autres termes, de telles billes impliquent des embouts de bridage complexes, coûteux et difficiles à mettre en oeuvre, ce qui implique qu'il n'est pas possible de l'associer à des pièces de tout type de matériaux et de toute sorte, notamment en termes de design complexe, etc. State of the art As represented in FIG. 1, in the patent application WO 2011/138568 of the Applicant, it is known a clamping end 1 of a laser-welding device for two pieces 2, 3 to be assembled. A first upper part 2, transparent to a laser beam F, is positioned on a second absorbent lower part 3. The clamping tip 1, at the heart of which the laser beam F is intended to be projected, exerts a predetermined force against the upper surface 2a of the upper part 2, so as to clamp the parts 2, 3 against each other. the other, to ensure sufficient docking to perform a good weld. The upper part 12 transparent to the laser beam F must be sufficiently rigid to allow movement of the clamping tip along the welding interface of the two parts, that is to say at the level of all areas where the parts are intended to be assembled (as described in the Applicant's patent application WO 2011/138568). However, even if this solution proves to be very effective, it does not make it possible to clamp and weld correctly any type of material of parts, in particular pieces of non-structural polymeric materials, that is to say not loaded in fibers and therefore more tender, or "soft". Similarly, such a clamping tip does not allow a homogeneous clamping on these types of materials, especially when moving the clamping tip along the welding interface. This can result in the appearance of a bead during the movement of the clamping tip and a marking of the upper part, for example of the hollow type, which gives a detrimental effect to the quality of the weld. To solve this problem, it is already known techniques for clamping transparent beads, able to roll on the upper surface of the upper part during assembly by laser welding, as described in particular in EP 1 440 784 and JP 2005 Such transparent beads make it possible not to mark the upper surface of the upper part, while being transparent to the laser beam F. However, such a solution has high stresses and strong technical limitations, particularly in terms of space requirement. level of the welding interface, such ball device requiring a large rebate width of the parts to be welded. Similarly, such techniques are not very flexible, the contact area of the ball on the part strongly depending on the diameter of the ball, with a strong impact on the design of the product that can be assembled with these technical solutions. In other words, such balls involve complex, expensive and difficult to implement clamping tips, which implies that it is not possible to associate it with parts of any type of material and any so, especially in terms of complex design, etc.

Objet de l'invention L'invention a pour but de remédier à l'ensemble des inconvénients précités et a pour objet la réalisation d'un embout de bridage qui puisse s'adapter à tout type de pièces, plus particulièrement tout type de matériaux, sans changer de façon lourde le dispositif d'assemblage associé pour le soudage laser par transparence, tout en permettant la mise en contact des deux pièces pendant le procédé de soudage laser par transparence associé. L'objet de l'invention est caractérisé, plus particulièrement, par le fait que l'embout de bridage est équipé d'un accessoire de bridage amovible, apte à être installé à l'extrémité de l'embout de bridage selon les caractéristiques du matériau de ladite pièce supérieure, ledit accessoire de bridage étant réalisé dans un matériau transparent au faisceau laser et résistant en fonction de l'effort appliqué sur ladite surface supérieure de ladite pièce supérieure et de la résistance au frottement engendrée par le déplacement de l'accessoire de bridage sur ladite surface supérieure de ladite pièce supérieure. OBJECT OF THE INVENTION The object of the invention is to remedy all of the aforementioned drawbacks and is intended to provide a clamping bit that can be adapted to any type of part, more particularly any type of material, without cumbersome changes to the associated assembly device for the transparent laser welding, while allowing the two parts to come into contact during the associated optical laser welding process. The object of the invention is characterized, more particularly, by the fact that the clamping endpiece is equipped with a removable clamping accessory, adapted to be installed at the end of the clamping bit according to the characteristics of the material of said upper part, said clamping accessory being made of a material transparent to the laser beam and resistant as a function of the force applied on said upper surface of said upper part and the frictional resistance caused by the displacement of the accessory clamping on said upper surface of said upper piece.

Un tel accessoire de bridage permet ainsi, à partir d'un embout de bridage déjà défini, d'adapter cet embout selon les cas, pour pouvoir souder des matériaux qui nécessitent un bridage différent, tout en conservant l'embout standard par un simple accessoire amovible, démontable et interchangeable. Such a clamping accessory thus makes it possible, from a previously defined clamping tip, to adapt this tip according to the case, to be able to weld materials that require a different clamping, while keeping the standard tip by a simple accessory removable, removable and interchangeable.

Grace à l'ajout d'un tel accessoire, transparent à la longueur d'onde du faisceau laser, améliorant l'homogénéité du bridage, celui-ci permet d'adapter à moindre coût et souder un panel de matériaux beaucoup plus large à partir d'un embout de bridage commun, sans être contraint de faire une étude produit /process spécifique pour chaque configuration de matériaux à assembler. Thanks to the addition of such an accessory, transparent to the wavelength of the laser beam, improving the homogeneity of the clamping, it allows to adapt at a lower cost and solder a much wider range of materials from a common clamping tip, without being forced to make a specific product / process study for each configuration of materials to assemble.

D'autres avantages et caractéristiques de l'invention peuvent être considérées isolément ou en combinaison : - Ledit accessoire de bridage peut comporter une première portion de maintien associée à l'embout de bridage et une seconde portion d'application dudit effort prédéterminé contre la surface supérieure de ladite pièce supérieure. - Ladite seconde portion peut comporter une surface plane ou une surface de forme convexe et son contour peut présenter un rayonnage de faibles dimensions, notamment de l'ordre de 0,5mm à 2mm. - L'embout de bridage comportant quatre doigts d'application sensiblement parallèles et agencés de sorte à former un embout de bridage de forme sensiblement cylindrique, ladite première portion de l'accessoire de bridage peut former sensiblement un premier cylindre, dont le diamètre est prédéterminé de sorte à s'insérer entre lesdits doigts d'application de l'embout de bridage, et ladite seconde portion peut former un second cylindre de diamètre supérieur au diamètre dudit premier cylindre, de sorte à venir en butée contre les extrémités desdits doigts d'application de l'embout de bridage. - Le contour dudit premier cylindre peut former un angle prédéterminé par rapport à la verticale, de sorte à permettre le montage à force de l'accessoire de bridage à l'extrémité de l'embout de bridage. - Ledit premier cylindre peut avoir une épaisseur de l'ordre de 5mm à 20mm, avec un diamètre de l'ordre de 12mm, et ledit second cylindre peut avoir une épaisseur de l'ordre de 5mm à 15mm, avec un diamètre de l'ordre de 18mm, pour un diamètre de l'embout de bridage de l'ordre de 18mm. - Ledit accessoire de bridage peut être réalisé en un matériau transparent du type verre, quartz ou saphir ou en un matériau transparent du type matière plastique ou matière thermoplastique. L'invention a également pour objet un procédé de remplacement d'un accessoire de bridage d'un tel embout de bridage, qui soit simple à mettre en oeuvre, rapide et peu coûteux. Other advantages and features of the invention may be considered in isolation or in combination: said clamping accessory may comprise a first holding portion associated with the clamping bit and a second portion of applying said predetermined force against the surface; upper part of said upper part. Said second portion may comprise a flat surface or a surface of convex shape and its outline may have a small rack, in particular of the order of 0.5 mm to 2 mm. - The clamping end comprising four substantially parallel application fingers and arranged to form a substantially cylindrical clamping tip, said first portion of the clamping accessory can substantially form a first cylinder, whose diameter is predetermined so as to be inserted between said fingers for applying the clamping tip, and said second portion can form a second cylinder of diameter greater than the diameter of said first cylinder, so as to abut against the ends of said fingers; application of the clamping tip. - The contour of said first cylinder may form a predetermined angle relative to the vertical, so as to allow the forced mounting of the clamping accessory at the end of the clamping tip. Said first cylinder may have a thickness of the order of 5 mm to 20 mm, with a diameter of the order of 12 mm, and said second cylinder may have a thickness of about 5 mm to 15 mm, with a diameter of order of 18mm, for a diameter of the clamping tip of the order of 18mm. - The said clamping accessory can be made of a transparent material of the glass, quartz or sapphire type or a transparent material of the plastic or thermoplastic material type. The invention also relates to a method of replacing a clamping accessory of such a clamping tip, which is simple to implement, fast and inexpensive.

Cet objet de l'invention est caractérisé, plus particulièrement, en ce qu'il comporte l'utilisation d'outils standards, permettant un remplacement manuel dudit accessoire de bridage, ou en ce qu'il comporte l'utilisation de moyens automatiques standards, permettant le remplacement automatisé dudit accessoire de bridage. Un tel procédé s'avère ainsi très simple à mettre en oeuvre à l'aide d'outils et de moyens standards et usuels. This object of the invention is characterized, more particularly, in that it comprises the use of standard tools, allowing a manual replacement of said clamping accessory, or in that it comprises the use of standard automatic means, allowing the automated replacement of said clamping accessory. Such a method is thus very simple to implement using tools and standard and customary means.

Description sommaire des dessins D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation de l'invention donnés à titre d'exemples non limitatifs et représentés aux dessins annexés, dans lesquels : La figure 1 représente une vue de face en coupe partielle d'un mode particulier de réalisation d'un embout de bridage selon l'art antérieur.30 La figure 2a représente une vue en coupe partielle d'un mode particulier de réalisation d'un embout de bridage selon l'invention, équipé d'un premier mode particulier de réalisation d'un accessoire de bridage. BRIEF DESCRIPTION OF THE DRAWINGS Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention given by way of nonlimiting example and represented in the accompanying drawings, in which: FIG. Partial sectional front view of a particular embodiment of a clamping bit according to the prior art. FIG. 2a shows a partial sectional view of a particular embodiment of a clamping bit according to FIG. invention, equipped with a first particular embodiment of a clamping accessory.

La figure 2b représente une vue de détail agrandie en perspective de l'extrémité de l'embout de bridage selon la figure 2a. Les figures 3a et 3b représentent schématiquement, et respectivement, une vue en perspective et une vue de face du premier mode particulier de réalisation de l'accessoire de bridage équipant l'embout de bridage selon les figures 2a et 2b. Les figures 4a et 4b représentent chacune schématiquement une vue de face d'une variante de réalisation d'un accessoire de bridage destiné à équiper un embout de bridage selon les figures 2a et 2b. La figure 5 représente schématiquement des étapes de réalisation d'un procédé de remplacement manuel selon l'invention, d'un accessoire de bridage destiné à équiper un embout de bridage selon les figures 2a et 2b. La figure 6 représente schématiquement des étapes de réalisation d'un procédé de remplacement automatique selon l'invention, d'un accessoire de bridage destiné à équiper un embout de bridage selon les figures 2a et 2b. Description de modes particuliers de réalisation En référence aux figures 2a à 6, un embout de bridage 10 selon l'invention est destiné à appliquer un effort prédéterminé contre une surface 30 supérieure 11a d'une pièce supérieure 11, positionnée sur une pièce inférieure 12. Selon l'invention, l'embout de bridage 10 consiste à être équipé, à son extrémité destinée à venir en contact de la surface supérieure 11a de la pièce 25 supérieure 11, comme représenté sur la figure 2a, d'un accessoire de bridage 13 amovible, utilisé uniquement selon les caractéristiques du matériau de la pièce supérieure 11, à savoir uniquement quand la pièce supérieure 11 est « molle ». Par « molle », ou « tendre », on entend une pièce dont le matériau présente des caractéristiques intrinsèques ne présentant pas une résistance suffisante pour éviter une déformation ou un marquage en réponse à l'effort prédéterminé exercé par l'embout de bridage 10 sur sa surface supérieure. A titre d'exemple, le matériau est un matériau thermoplastique chargé en fibres de verre et dont la proportion de fibres de verre est trop faible pour être résistant à l'embout de bridage 10, notamment dont la proportion de fibres est comprise entre 0% et 30%. Comme représenté sur les figures 2a et 2b, l'accessoire de bridage 13 est réalisé en un matériau transparent, de sorte à être traversé par le faisceau laser F. Plus particulièrement, l'accessoire de bridage 13 est réalisé en un matériau dont les caractéristiques intrinsèques lui permettent d'être suffisamment résistant à l'effort appliqué par l'embout de bridage 10 sur la surface supérieure 11 a de la pièce supérieure 11 et suffisamment résistant au frottement engendré par le déplacement de l'embout de bridage 10 sur la surface supérieure 11 a de la pièce supérieur 11, lors du procédé d'assemblage par soudage laser associé. D'une façon générale, les caractéristiques intrinsèque du matériau constitutif de l'accessoire de bridage 13 sont telles qu'elles permettent de répondre à la fois aux contraintes engendrées par l'effort appliqué sur la surface supérieure 11a de la pièce supérieure 11 et par les efforts de frottement engendrés lors de la translation de l'embout de bridage 10 le long de l'interface de soudage associée. A titre d'exemple, l'effort appliqué sur la surface supérieure 11 a de la pièce supérieure 11 est de l'ordre de 50daN maximum. Figure 2b shows an enlarged detail view in perspective of the end of the clamping tip according to Figure 2a. Figures 3a and 3b show schematically and respectively a perspective view and a front view of the first particular embodiment of the clamping accessory equipping the clamping tip according to Figures 2a and 2b. Figures 4a and 4b each show schematically a front view of an alternative embodiment of a clamping accessory for fitting a clamping tip according to Figures 2a and 2b. FIG. 5 schematically represents steps for producing a manual replacement method according to the invention, of a clamping accessory intended to equip a clamping bit according to FIGS. 2a and 2b. FIG. 6 schematically represents steps for producing an automatic replacement method according to the invention, of a clamping accessory intended to equip a clamping bit according to FIGS. 2a and 2b. DESCRIPTION OF SPECIFIC EMBODIMENTS With reference to FIGS. 2a to 6, a clamping tip 10 according to the invention is intended to apply a predetermined force against an upper surface 11a of an upper piece 11, positioned on a lower piece 12. According to the invention, the clamping tip 10 consists of being equipped, at its end intended to come into contact with the upper surface 11a of the upper part 11, as shown in FIG. 2a, with a clamping accessory 13 removable, used only according to the characteristics of the material of the upper part 11, namely only when the upper part 11 is "soft". By "soft", or "soft" is meant a part whose material has intrinsic characteristics not having sufficient strength to avoid deformation or marking in response to the predetermined force exerted by the clamping tip 10 on its upper surface. By way of example, the material is a thermoplastic material filled with glass fibers and whose proportion of glass fibers is too small to be resistant to the clamping tip 10, in particular of which the proportion of fibers is between 0%. and 30%. As shown in Figures 2a and 2b, the clamping accessory 13 is made of a transparent material, so as to be traversed by the laser beam F. More particularly, the clamping accessory 13 is made of a material whose characteristics. intrinsic allow it to be sufficiently resistant to the force applied by the clamping tip 10 on the upper surface 11a of the upper part 11 and sufficiently resistant to friction generated by the displacement of the clamping tip 10 on the surface upper 11a of the upper part 11, during the assembly process by laser welding associated. In general, the intrinsic characteristics of the constituent material of the clamping accessory 13 are such that they make it possible to meet both the stresses generated by the force applied on the upper surface 11a of the upper part 11 and by the friction forces generated during the translation of the clamping tip 10 along the associated welding interface. By way of example, the force applied on the upper surface 11a of the upper part 11 is of the order of 50daN maximum.

A titre d'exemple, l'accessoire de bridage 13 est réalisé en un matériau transparent du type verre, quartz ou saphir. Encore à titre d'exemple, l'accessoire de bridage peut être réalisé en un matériau synthétique, voir céramique, ou en un matériau transparent du type matière plastique ou matière thermoplastique. D'une façon générale, le matériau choisi pour l'accessoire de bridage 13 doit permettre une transmission de 100% des longueurs d'ondes du faisceau laser F, avec un niveau de transparence selon la longueur d'ondes souhaitée, et peut être de tout type tant que les contraintes mécaniques set thermiques n'affectent pas sa résistance à l'effort appliqué sur la surface supérieure 11 a de la pièce supérieure 11 et aux efforts de frottement engendrés par la translation de l'embout de bridage 10. For example, the clamping accessory 13 is made of a transparent material such as glass, quartz or sapphire. Still as an example, the clamping accessory can be made of a synthetic material, see ceramic, or a transparent material of the plastic or thermoplastic material type. In general, the material chosen for the clamping accessory 13 must allow transmission of 100% of the wavelengths of the laser beam F, with a level of transparency according to the desired wavelength, and may be of any type as long as the thermal set constraints do not affect its resistance to the force applied on the upper surface 11a of the upper part 11 and to the friction forces generated by the translation of the clamping piece 10.

Dans le mode particulier de réalisation représenté sur les figures 2a et 2b, l'embout de bridage 10 comporte, par exemple, quatre doigts d'application 14, sensiblement parallèles et agencés de sorte à former un embout de bridage de forme sensiblement cylindrique et de diamètre d (figure 2b). Les quatre doigts d'application 14 délimitent ainsi une zone centrale à travers laquelle est projeté le faisceau laser F en direction de la surface supérieure 11 a de la pièce supérieure 11 (figure 2a). Comme représenté plus en détails sur la figure 2b, chaque doigt d'application 14 de l'embout de bridage 10 comporte une section 15 sensiblement arrondie et un embout 16 sensiblement bombé ou arrondi, de sorte notamment à éviter de marquer la surface supérieure 11a de la pièce supérieure 11, en condition d'utilisation sans accessoire de bridage 13. Par ailleurs, les doigts d'application 14 de l'embout de bridage 10 sont avantageusement reliés par au moins une paroi pleine 17, jouant notamment le rôle d'une portion de rigidification de l'embout de bridage 10. D'une façon générale, la longueur de l'embout de bridage 10 est la plus faible possible, pour des raisons de résistance des matériaux, la longueur étant calculée, de préférence, pour éviter une casse de l'embout de bridage 10. Par ailleurs, une telle paroi 17 de rigidification permet avantageusement de bloquer les calories engendrées par la réflexion du faisceau laser F sur les doigts d'application 14 2983 768 9 de l'embout de bridage 10, lors de l'étape de soudage laser du procédé d'assemblage associé. Par ailleurs, l'embout de bridage 10 peut être associé à un système de 5 refroidissement par soufflage d'air, projeté de préférence au coeur des doigts d'application 14 de l'embout de bridage 10, de sorte à ce que l'embout de bridage 10 puisse résister à une température, par exemple, de l'ordre de 250°C. De même, des interstices 18 formés entre les doigts d'application 14 de 10 l'embout de bridage 10 permettent d'optimiser le refroidissement et les embouts 16 des doigts d'application 14 présentent une forme optimisée au mieux pour permettre le passage du faisceau laser F et le passage de l'air en vue du refroidissement de l'embout de bridage 10 et pour optimiser l'insertion de l'accessoire de bridage 13, comme décrit ci-après. 15 Comme représenté plus particulièrement sur les figures 2b, 3a et 3b, l'accessoire de bridage 13 associé à un tel embout de bridage 10 comporte une première portion 19 destinée à s'insérer entre les doigts d'application 14 de l'embout de bridage 10, de sorte à maintenir serré l'accessoire de bridage 13 à 20 l'extrémité de l'embout de bridage 10. Par ailleurs, l'accessoire de bridage 13 comporte une seconde portion 20 faisant office de portion d'application de l'effort exercé par l'embout de bridage 10 sur la surface supérieure 11 a de la pièce supérieure 11 (figure 2a). 25 La première portion 19 forme sensiblement un premier cylindre 21, dont le diamètre dl est prédéterminé de sorte à être inséré en force entre les doigts d'application 14 de l'embout de bridage 10 (figure 3a). Plus particulièrement, comme représenté sur la figure 3b, le contour, ou la surface de révolution, du premier cylindre 21 de l'accessoire de bridage 13 peut former un angle X par 30 rapport à la verticale, de sorte à permettre le montage à force entre les doigts d'application 14 de l'embout de bridage 10. A titre d'exemple, l'angle X est calculé de sorte à réduire le diamètre du premier cylindre 21 de l'ordre de 1 mm, de sorte à faciliter l'emmanchement de l'accessoire de bridage 13. De même, la seconde portion 20 forme sensiblement un second cylindre 22, dont le diamètre d2 est prédéterminé et supérieur au diamètre dl du premier cylindre 21, de sorte à venir en butée contre les embouts arrondis 16 des doigts d'application 14 de l'embout de bridage 10 (figures 2b et 3a). Par ailleurs, le second cylindre 22 comporte avantageusement une surface 23, de préférence plane, destinée à venir en contact contre la surface supérieure 11 a de la pièce supérieure 11 (figure 2a). Par ailleurs, comme représenté plus particulièrement sur la figure 3b, les arêtes du second cylindre 22 comportent des angles rayonnés 24. Plus particulièrement, le contour de la surface 23 plane du second cylindre 22 comporte les angles rayonnés 24, de préférence de faibles dimensions, par exemple de l'ordre de 0,5mm à 2mm, de sorte notamment à éviter le marquage de la surface supérieure 11 a de la pièce supérieure 11, et ne pas altérer le déplacement de l'embout de bridage 10 et donc de l'accessoire de bridage 13 sur la pièce supérieure 11. In the particular embodiment shown in FIGS. 2a and 2b, the clamping bit 10 comprises, for example, four generally parallel application fingers 14 arranged so as to form a substantially cylindrical clamping tip and diameter d (Figure 2b). The four application fingers 14 thus delimit a central zone through which the laser beam F is projected in the direction of the upper surface 11a of the upper part 11 (FIG. 2a). As shown in greater detail in FIG. 2b, each applicator finger 14 of the clamping endpiece 10 has a substantially rounded section 15 and a tip 16 that is substantially rounded or curved, so that the upper surface 11a the upper part 11, in use condition without clamping accessory 13. Moreover, the application fingers 14 of the clamping tip 10 are advantageously connected by at least one solid wall 17, playing in particular the role of a stiffening portion of the clamping tip 10. In general, the length of the clamping tip 10 is as small as possible, for reasons of strength of the materials, the length being calculated, preferably, to avoid In addition, such a wall 17 for stiffening advantageously makes it possible to block the calories generated by the reflection of the laser beam F on the application fingers 14 2983 768 9 of the clamping tip 10, during the laser welding step of the associated assembly method. Furthermore, the clamping endpiece 10 may be associated with an air blast cooling system, preferably projected into the heart of the application fingers 14 of the clamping endpiece 10, so that the Clamping tip 10 can withstand a temperature, for example of the order of 250 ° C. Similarly, gaps 18 formed between the application fingers 14 of the clamping tip 10 make it possible to optimize the cooling and the tips 16 of the application fingers 14 have a shape optimized at best to allow the beam to pass through. laser F and the passage of air for the cooling of the clamping tip 10 and to optimize the insertion of the clamping accessory 13, as described below. As shown more particularly in FIGS. 2b, 3a and 3b, the clamping accessory 13 associated with such a clamping endpiece 10 comprises a first portion 19 intended to be inserted between the application fingers 14 of the end piece. 10, so as to hold the clamping accessory 13 tightly to the end of the clamping tip 10. Furthermore, the clamping accessory 13 comprises a second portion 20 acting as application portion of the the force exerted by the clamping tip 10 on the upper surface 11a of the upper part 11 (Figure 2a). The first portion 19 substantially forms a first cylinder 21, whose diameter d1 is predetermined so as to be inserted in force between the application fingers 14 of the clamping tip 10 (Figure 3a). More particularly, as shown in FIG. 3b, the contour, or the surface of revolution, of the first cylinder 21 of the clamping fixture 13 can form an angle X with respect to the vertical, so as to allow for force mounting. between the application fingers 14 of the clamping endpiece 10. By way of example, the angle X is calculated so as to reduce the diameter of the first cylinder 21 of the order of 1 mm, so as to facilitate the Also, the second portion 20 substantially forms a second cylinder 22, whose diameter d2 is predetermined and greater than the diameter d1 of the first cylinder 21, so as to abut against the rounded ends. 16 of the application fingers 14 of the clamping tip 10 (Figures 2b and 3a). Furthermore, the second cylinder 22 advantageously comprises a surface 23, preferably flat, intended to come into contact against the upper surface 11a of the upper part 11 (Figure 2a). Moreover, as shown more particularly in FIG. 3b, the edges of the second cylinder 22 comprise radiated angles 24. More particularly, the contour of the planar surface 23 of the second cylinder 22 comprises the radiated angles 24, preferably of small dimensions, for example of the order of 0.5mm to 2mm, so in particular to avoid marking the upper surface 11a of the upper part 11, and not to alter the movement of the clamping tip 10 and therefore the clamping accessory 13 on the upper part 11.

A titre d'exemple, le premier cylindre 21 a une épaisseur el de l'ordre de 5mm à 20mm, avec un diamètre dl de l'ordre de 12mm, et le second cylindre 22 a une épaisseur e2 de l'ordre de 5mm à 15mm, avec un diamètre d2 de l'ordre de 18mm, pour un diamètre d de l'embout de bridage 10 de l'ordre de 18mm (figure 2b). De manière avantageuse, le diamètre d2 de l'accessoire de bridage est égal au diamètre d de l'embout de bridage 10, de sorte à optimiser l'encombrement de l'embout de bridage 10 lors du procédé de soudage laser associé. For example, the first cylinder 21 has a thickness el of the order of 5mm to 20mm, with a diameter dl of the order of 12mm, and the second cylinder 22 has a thickness e2 of the order of 5mm to 15mm, with a diameter d2 of the order of 18mm, for a diameter d of the clamping tip 10 of the order of 18mm (Figure 2b). Advantageously, the diameter d2 of the clamping accessory is equal to the diameter d of the clamping tip 10, so as to optimize the size of the clamping tip 10 during the associated laser welding process.

Dans la variante de réalisation de l'accessoire de bridage 13, comme représenté sur la figure 4a, celui-ci comporte une surface 25 convexe au niveau du second cylindre 22 de sa seconde portion 20 destinée à venir en contact contre la surface supérieure 11 a de la pièce supérieure 11. A titre d'exemple, la surface convexe 25 a un rayon compris entre 30° et 60°, par exemple 45°. Dans cette variante de réalisation, la seconde portion 20 forme également sensiblement le second cylindre 22, avec la surface 25 convexe, les arêtes du second cylindre 22 comportant, de préférence, les angles rayonnés 24 et la première portion 19 comporte avantageusement l'angle X par rapport à la verticale, de sorte à optimiser l'emmanchement de l'accessoire de bridage 13 entre les doigts d'application 14 de l'embout de bridage 10. In the alternative embodiment of the clamping accessory 13, as shown in FIG. 4a, the latter comprises a convex surface 25 at the level of the second cylinder 22 of its second portion 20 intended to come into contact with the upper surface 11a. of the upper part 11. By way of example, the convex surface 25 has a radius of between 30 ° and 60 °, for example 45 °. In this variant embodiment, the second portion 20 also substantially forms the second cylinder 22, with the convex surface 25, the edges of the second cylinder 22 preferably comprising the radiated angles 24 and the first portion 19 advantageously having the angle X relative to the vertical, so as to optimize the fitting of the clamping accessory 13 between the application fingers 14 of the clamping tip 10.

Dans la variante de réalisation de l'accessoire de bridage 13, comme représenté sur la figure 4b, la première portion 19 de l'accessoire de bridage 13 comporte une première dem i-portion 32, avantageusement de forme cylindrique, c'est-à-dire sans angle X par rapport à la verticale, le diamètre dl de cette première demi-portion 33 correspondant sensiblement au diamètre intérieur formé par les doigts d'application 14 de l'embout de bridage 10. La première portion 19 comporte aussi une deuxième demi-portion 33, à la suite de la première demi-portion 32, et présentant un angle X par rapport à la verticale, de sorte à optimiser l'emmanchement de l'accessoire de bridage 13 à l'extrémité de l'embout de bridage 10. A titre d'exemple, l'angle X est calculé de sorte à réduire le diamètre de la seconde demi-portion 33 de l'ordre de 1 mm. Ainsi, quel que soit le mode de réalisation décrit ci-dessus, un tel embout de bridage 10 selon l'invention est très simple d'utilisation, dans la mesure où selon le type de pièce considérée, il suffit d'embarquer un accessoire de bridage 13 supplémentaire et amovible sur l'embout de bridage 1 standard. L'embout de bridage n'est ainsi pas modifié et permet ainsi d'être flexible selon les applications, à savoir pouvant être utilisé pour souder un large panel de matériaux thermoplastiques, quelles que soient leurs matières et leurs géométries. Il en résulte ainsi des gains en termes de coûts d'utilisation, de fabrication, de maintenance, etc. In the variant embodiment of the clamping accessory 13, as represented in FIG. 4b, the first portion 19 of the clamping accessory 13 comprises a first half-portion 32, advantageously of cylindrical shape, that is to say without angle X with respect to the vertical, the diameter d1 of this first half-portion 33 corresponding substantially to the inside diameter formed by the application fingers 14 of the clamping endpiece 10. The first portion 19 also comprises a second half-portion 33, following the first half-portion 32, and having an angle X relative to the vertical, so as to optimize the fitting of the clamping accessory 13 at the end of the tip of 10. By way of example, the angle X is calculated so as to reduce the diameter of the second half-portion 33 of the order of 1 mm. Thus, regardless of the embodiment described above, such a clamping tip 10 according to the invention is very easy to use, insofar as according to the type of part considered, it is sufficient to embark an accessory of additional clamping 13 and removable on the clamping tip 1 standard. The clamping tip is thus not modified and thus allows to be flexible according to the applications, namely that can be used to weld a wide panel of thermoplastic materials, whatever their materials and their geometries. This results in gains in terms of costs of use, manufacturing, maintenance, etc.

Par ailleurs, un tel accessoire de bridage 13 peut être positionné sur tout type d'embout de bridage 10 et permet une surface de contact plus homogène, notamment sur la zone à souder, pour garantir un bon accostage et non pas seulement dans sa périphérie du fait de son manque de rigidité. Il permet également une plus grande surface de contact et évite ainsi de marquer et creuser la surface supérieure 11a de la pièce supérieure 11. De même, il permet d'obtenir une largeur optimale de cordon de soudure par rapport au spot du faisceau laser F projeté, notamment par rapport aux solutions à billes de l'état de la technique, où les surfaces de contact peuvent s'avérer trop faibles. Furthermore, such a clamping accessory 13 can be positioned on any type of clamping tip 10 and allows a more homogeneous contact surface, especially on the area to be welded, to ensure a good approach and not only in its periphery of the made of its lack of rigidity. It also allows a greater contact area and thus avoids marking and digging the upper surface 11a of the upper part 11. Similarly, it provides an optimum weld bead width with respect to the spot of the projected laser beam F , especially compared to ball solutions of the state of the art, where the contact surfaces may be too low.

Le procédé de remplacement d'un tel accessoire de bridage 13 va maintenant être décrit plus en détails au regard des figures 5 et 6. Sur la figure 5 est représenté un premier mode particulier de réalisation du procédé de remplacement selon l'invention, à savoir un remplacement manuel de l'accessoire de bridage 13 par l'intermédiaire d'outils standards. Sur la figure 5, en considérant le fait qu'un accessoire de bridage 13 équipe l'embout de bridage 10 selon l'invention, une première étape (a) du remplacement manuel de l'accessoire de bridage 13 consiste à insérer, selon la flèche T1, un premier outil, plus particulièrement une tige 26 d'un premier outil, par exemple une tige d'un tournevis, dont les dimensions sont telles qu'elles permettent de s'insérer entre les doigts d'application 14 de l'embout de bridage 10. Dans cette position, la tige 26 se situe au dessus de l'accessoire de bridage 13. The method of replacing such a clamping accessory 13 will now be described in more detail with reference to FIGS. 5 and 6. FIG. 5 shows a first particular embodiment of the replacement method according to the invention, namely manual replacement of the clamping accessory 13 by means of standard tools. In FIG. 5, considering the fact that a clamping accessory 13 equips the clamping bit 10 according to the invention, a first step (a) of the manual replacement of the clamping accessory 13 consists in inserting, according to the T1 arrow, a first tool, more particularly a rod 26 of a first tool, for example a screwdriver rod, whose dimensions are such that they can be inserted between the application fingers 14 of the clamping end 10. In this position, the rod 26 is located above the clamping accessory 13.

Une fois la tige 26 traversant complètement l'embout de bridage 10, une seconde étape (b) du procédé de remplacement manuel consiste à effectuer, avec la tige 26 du premier outil, un mouvement de levier, selon la flèche L1 sur la figure 5, de sorte à débloquer l'accessoire de bridage 13 inséré entre les doigts d'application 14 de l'embout de bridage 10 et le faire tomber verticalement selon les flèches T2 dans un bac de récupération 27. Sur la figure 2983 768 13 5, le bac de récupération 27 comporte, par exemple, une pluralité d'accessoires de bridage 13 prêts à l'utilisation et/ou venant juste d'être évacués. Dans une troisième étape (c) du procédé de remplacement manuel, pour 5 installer un nouvel accessoire de bridage 13 à l'extrémité de l'embout de bridage 10, il suffit de se munir d'un tel nouvel accessoire de bridage 13 et de le positionner sensiblement au niveau des doigts d'application 14, par exemple en effectuant une pré-insertion. Enfin, à l'aide d'un second outil standard 28, du type marteau, maillet ou équivalent, il suffit d'appliquer un coup vers le haut 10 selon les flèches T3 de la figure 5, avant d'assurer l'insertion complète à force de l'accessoire de bridage 13 entre les doigts d'application 14 de l'embout de bridage 10. Dans la dernière étape (d) de la figure 5, l'embout de bridage 10 ainsi équipé d'un tel accessoire de bridage 13 est ainsi prêt à l'utilisation.Once the rod 26 completely passes through the clamping tip 10, a second step (b) of the manual replacement method consists in carrying out, with the rod 26 of the first tool, a lever movement, according to the arrow L1 in FIG. , so as to release the clamping accessory 13 inserted between the application fingers 14 of the clamping tip 10 and to make it fall vertically according to the arrows T2 into a recovery tank 27. In FIG. 2983 768 13 5, the recovery tank 27 comprises, for example, a plurality of clamping accessories 13 ready to use and / or just been evacuated. In a third step (c) of the manual replacement method, to install a new clamping accessory 13 at the end of the clamping bit 10, it is sufficient to provide such a new clamping accessory 13 and position it substantially at the application fingers 14, for example by performing a pre-insertion. Finally, with the aid of a second standard tool 28, of the hammer, mallet or equivalent type, it suffices to apply a blow upwards 10 according to the arrows T3 of FIG. 5, before ensuring complete insertion. by force of the clamping accessory 13 between the application fingers 14 of the clamping endpiece 10. In the last step (d) of FIG. 5, the clamping bit 10 thus equipped with such an attachment of clamping 13 is thus ready for use.

15 Sur la figure 6 est représenté un second mode particulier de réalisation du procédé de remplacement selon l'invention, à savoir un remplacement automatique, ou automatisé, de l'accessoire de bridage 13 par l'intermédiaire de moyens automatisés standards. Sur la figure 6, en considérant le fait qu'un accessoire de bridage 13 équipe l'embout de bridage 10 selon l'invention, une 20 première étape (a) du remplacement automatique de l'accessoire de bridage 13 consiste, selon un mouvement de translation horizontal de l'embout de bridage 10, selon la flèche T4 sur la figure 6, à faire passer une barre horizontale 29a d'une potence ou d'un portique 29, entre les doigts d'application 14 de l'embout de bridage 10. Dans cette position, la barre 29a du portique 29 se trouve au- 25 dessus de l'accessoire de bridage 13. La potence 29, plus particulièrement la barre 29a, présente des dimensions telles qu'elles permettent de s'insérer entre les doigts d'application 14 de l'embout de bridage 10. Une fois la barre 29a traversant complètement l'embout de bridage 10, 30 une seconde étape (b) du procédé de remplacement automatique consiste à faire effectuer un mouvement de translation verticale vers le haut à l'embout de bridage 10, selon la flèche T5 sur la figure 6, de sorte à débloquer l'accessoire 2 983 76 8 14 de bridage 13 inséré entre les doigts d'application 14 de l'embout de bridage 10 et le faire tomber verticalement selon les flèches T6 dans un bac de récupération 30. Sur la figure 6, le bac de récupération 30 comporte, par exemple, une pluralité d'accessoires de bridage 13 prêts à l'utilisation et/ou 5 venant juste d'être évacués. Dans une troisième étape (c) du procédé de remplacement automatique, pour installer un nouvel accessoire de bridage 13 à l'extrémité de l'embout de bridage 10, l'embout de bridage 10 est approché d'un système de tapis 31, ou 10 de convoyeur, sur lequel circulent des accessoires de bridage 13 prêts à l'emploi, par exemple selon les flèches T9 de défilement. Une translation verticale vers le bas de l'embout de bridage 10, selon la flèche T7 sur la figure 6, permet ainsi une insertion de l'accessoire de bridage 13, l'intensité de la translation T7 devant être suffisante pour assurer l'insertion complète à force de 15 l'accessoire de bridage 13 entre les doigts d'application 14 de l'embout de bridage 10. Enfin dans la dernière étape (d) du procédé de remplacement automatique, une translation vers le haut de l'embout de bridage 10 ainsi 20 équipé par l'accessoire de bridage 13, selon la flèche T8 de la figure 6, permet ainsi à l'embout de bridage 10 d'être prêt à l'utilisation. Ainsi, quel que soit le procédé de remplacement de l'accessoire de bridage 13 de l'embout de bridage 10 selon l'invention, à savoir manuel ou 25 automatique, celui-ci s'avère donc extrêmement simple, facile à mettre en oeuvre et peu coûteux, notamment grâce à l'utilisation d'outils manuels standards et de moyens automatisés standards. Par ailleurs, de tels procédés n'engendrent aucune modification de conception pour l'embout de bridage 10 et/ou pour l'accessoire de bridage 13.FIG. 6 shows a second particular embodiment of the replacement method according to the invention, namely an automatic or automated replacement of the clamping accessory 13 by means of standard automated means. In FIG. 6, considering that a clamping accessory 13 equips the clamping bit 10 according to the invention, a first step (a) of the automatic replacement of the clamping accessory 13 consists, according to a movement horizontal translation of the clamping tip 10, according to the arrow T4 in Figure 6, to pass a horizontal bar 29a of a bracket or a gantry 29, between the application fingers 14 of the tip of In this position, the bar 29a of the gantry 29 is above the clamping accessory 13. The bracket 29, more particularly the bar 29a, has dimensions such that they allow to fit between the application fingers 14 of the clamping tip 10. Once the bar 29a completely passes through the clamping tip 10, a second step (b) of the automatic replacement method consists in causing a vertical translation movement towards the top to the clamping tip 10, according to the arrow T5 in FIG. 6, so as to unlock the clamping accessory 13 inserted between the application fingers 14 of the clamping bit 10 and to make it fall vertically along the arrows T6 into a tray of In FIG. 6, the recovery tank 30 comprises, for example, a plurality of clamping accessories 13 that are ready for use and / or have just been evacuated. In a third step (c) of the automatic replacement method, to install a new clamping accessory 13 at the end of the clamping tip 10, the clamping tip 10 is approached by a carpet system 31, or 10 conveyor, on which circulating clamping accessories 13 ready for use, for example according to the arrows T9 scroll. A vertical downward translation of the clamping tip 10, according to the arrow T7 in FIG. 6, thus allows insertion of the clamping accessory 13, the intensity of the translation T7 must be sufficient to ensure the insertion The clamping accessory 13 is completed by force between the application fingers 14 of the clamping bit 10. Finally, in the last step (d) of the automatic replacement method, an upward translation of the bit The clamping device 10 thus equipped with the clamping accessory 13, according to the arrow T8 of FIG. 6, thus makes it possible for the clamping bit 10 to be ready for use. Thus, whatever the method of replacing the clamping accessory 13 of the clamping tip 10 according to the invention, namely manual or automatic, it is thus extremely simple, easy to implement and inexpensive, especially through the use of standard hand tools and standard automated means. Furthermore, such methods do not cause any design changes for the clamping tip 10 and / or the clamping accessory 13.

30 L'invention n'est pas limitée aux différents modes de réalisation décrits ci-dessus. Notamment, l'accessoire de bridage 13 peut être de formes 2 983 76 8 15 différentes et peut avoir des dimensions différentes, tant qu'il est réalisé en un matériau 100% transparent au faisceau laser F et tant qu'il est réalisé en un matériau suffisamment résistant à l'effort appliqué et aux efforts de frottement engendrés par le déplacement de l'embout de bridage 10, et ce sans 5 détérioration de la pièce supérieure. Notamment, l'accessoire de bridage 13, comme représenté sur la figure 3a, peut comporter une première demi-portion 32 et une seconde demi-portion 33 au niveau du premier cylindre 21, comme pour l'accessoire de bridage 13 10 représenté sur la figure 4b. L'accessoire de bridage 13, comme représenté sur la figure 4a, peut présenter un premier cylindre 21 sans angle X par rapport à la verticale et l'accessoire de bridage 13, comme représenté sur la figure 4b, peut comporter une surface convexe 25 comme surface de contact du deuxième cylindre 22.The invention is not limited to the various embodiments described above. In particular, the clamping accessory 13 may be of different shapes and may have different dimensions, as long as it is made of a material 100% transparent to the laser beam F and as long as it is made in one piece. material sufficiently resistant to the applied force and the frictional forces generated by the displacement of the clamping tip 10, and without deterioration of the upper part. In particular, the clamping accessory 13, as shown in FIG. 3a, may comprise a first half-portion 32 and a second half-portion 33 at the level of the first cylinder 21, as for the clamping accessory 13 shown in FIG. Figure 4b. The clamping accessory 13, as shown in FIG. 4a, may have a first cylinder 21 without an angle X with respect to the vertical and the clamping accessory 13, as shown in FIG. 4b, may comprise a convex surface 25 such as contact surface of the second cylinder 22.

15 L'embout de bridage 10 selon l'invention peut comporter un nombre différents de doigts d'application, par exemple trois doigts d'application agencés sensiblement parallèlement de sorte à être positionnés sensiblement aux trois sommets d'un triangle, tant qu'ils permettent l'insertion d'un accessoire de 20 bridage 13 à l'extrémité de l'embout de bridage 10 destinée à venir en contact contre la surface supérieure 11a de la pièce supérieure 11. De même, l'embout de bridage 10 peut être de formes différentes et peut avoir des dimensions différentes, selon la résistance des matériaux des pièces 11, 12 à assembler.The clamping tip 10 according to the invention may comprise a different number of application fingers, for example three application fingers arranged substantially parallel so as to be positioned substantially at the three corners of a triangle, as long as they allow the insertion of a clamping device 13 at the end of the clamping tip 10 intended to come into contact with the upper surface 11a of the upper part 11. Similarly, the clamping piece 10 may be of different shapes and may have different dimensions, depending on the strength of the materials of the parts 11, 12 to be assembled.

25 L'invention s'applique notamment à tout type de dispositif d'assemblage par soudage laser nécessitant un embout de bridage 10 pour effectuer le bridage de la pièce supérieure 11 contre la pièce inférieure 12. L'invention s'applique également à tout type de pièces d'un véhicule automobile dont le matériau nécessite l'utilisation d'un tel accessoire de bridage 13. 30 The invention applies in particular to any type of assembly device by laser welding requiring a clamping tip 10 to effect the clamping of the upper part 11 against the lower part 12. The invention also applies to any type of parts of a motor vehicle whose material requires the use of such a clamping accessory 13. 30

Claims (10)

REVENDICATIONS1. Embout de bridage (10) d'un dispositif d'assemblage de deux pièces (11, 12) par soudage laser par transparence, une première pièce supérieure (11) transparente étant positionnée sur une seconde pièce inférieure (12) absorbante, le dispositif d'assemblage comportant un moyen de projection d'un faisceau laser (F) sur la surface supérieure (11a) de ladite pièce supérieure (11) et l'embout de bridage (10) étant destiné à exercer un effort prédéterminé contre la surface supérieure (11a) de ladite pièce supérieure (11), embout de bridage caractérisé en ce qu'il est équipé d'un accessoire de bridage (13) amovible, apte à être installé à l'extrémité de l'embout de bridage (10) selon les caractéristiques du matériau de ladite pièce supérieure (11), ledit accessoire de bridage (13) étant réalisé dans un matériau transparent au faisceau laser (F) et résistant à l'effort appliqué sur ladite surface supérieure (11a) de ladite pièce supérieure (11) et au frottement engendré par le déplacement de l'accessoire de bridage (13) sur ladite surface supérieure (11a) de ladite pièce supérieure (11). REVENDICATIONS1. A clamping end (10) of a two-piece joining device (11, 12) by laser-transparency welding, a first transparent upper part (11) being positioned on a second absorbent lower part (12), the assembly comprising means for projecting a laser beam (F) on the upper surface (11a) of said upper part (11) and the clamping end (10) being intended to exert a predetermined force against the upper surface ( 11a) of said upper piece (11), a clamping bit characterized in that it is equipped with a removable clamping device (13), able to be installed at the end of the clamping piece (10) according to the characteristics of the material of said upper piece (11), said clamping accessory (13) being made of a material transparent to the laser beam (F) and resistant to the force applied on said upper surface (11a) of said upper piece ( 11) and the rottement generated by the displacement of the clamping accessory (13) on said upper surface (11a) of said upper part (11). 2. Embout de bridage (10) selon la revendication 1, caractérisé en ce que ledit accessoire de bridage (13) comporte une première portion (19) de maintien associée à l'embout de bridage (10) et une seconde portion (20) d'application dudit effort prédéterminé contre la surface supérieure (11a) de ladite pièce supérieure (11). 2. clamping bit (10) according to claim 1, characterized in that said clamping accessory (13) comprises a first portion (19) for holding associated with the clamping tip (10) and a second portion (20). applying said predetermined force against the upper surface (11a) of said upper piece (11). 3. Embout de bridage (10) selon la revendication précédente, caractérisé en ce que ladite seconde portion (20) comporte une surface (23) plane. 3. Clamping end (10) according to the preceding claim, characterized in that said second portion (20) comprises a surface (23) planar. 4. Embout de bridage (10) selon la revendication 2, caractérisé en ce que ladite seconde portion (20) comporte une surface (25) de forme convexe. 4. Clamping end (10) according to claim 2, characterized in that said second portion (20) has a surface (25) of convex shape. 5. Embout de bridage (10) selon l'une des revendications 3 et 4, caractérisé en ce que le contour de ladite surface (23, 25) de ladite seconde portion(20) présente un rayonnage (24) de faibles dimensions, notamment de l'ordre de 0,5mm à 2mm. 5. Clamping bit (10) according to one of claims 3 and 4, characterized in that the contour of said surface (23, 25) of said second portion (20) has a shelf (24) of small dimensions, including of the order of 0.5mm to 2mm. 6. Embout de bridage (10) selon l'une quelconque des revendications 2 à 5, caractérisé en ce que, l'embout de bridage (10) comportant quatre doigts d'application (14) sensiblement parallèles et agencés de sorte à former un embout de bridage (10) de forme sensiblement cylindrique, ladite première portion (19) de l'accessoire de bridage (13) forme sensiblement un premier cylindre (21), dont le diamètre (dl) est prédéterminé de sorte à s'insérer entre lesdits doigts d'application (14) de l'embout de bridage (10), et ladite seconde portion (20) forme un second cylindre (22) de diamètre (d2) supérieur au diamètre (dl) dudit premier cylindre (21), de sorte à venir en butée contre les extrémités (16) desdits doigts d'application (14) de l'embout de bridage (10). 6. clamping bit (10) according to any one of claims 2 to 5, characterized in that the clamping tip (10) having four fingers (14) substantially parallel and arranged to form a clamping nozzle (10) of substantially cylindrical shape, said first portion (19) of the clamping accessory (13) substantially forms a first cylinder (21), whose diameter (dl) is predetermined so as to fit between said application fingers (14) of the clamping tip (10), and said second portion (20) forms a second cylinder (22) of diameter (d2) larger than the diameter (d1) of said first cylinder (21), so as to abut against the ends (16) of said application fingers (14) of the clamping tip (10). 7. Embout de bridage (10) selon la revendication précédente, caractérisé en ce que le contour dudit premier cylindre (21) forme un angle (X) prédéterminé par rapport à la verticale, de sorte à permettre le montage à force de l'accessoire de bridage (13) à l'extrémité de l'embout de bridage (10). 7. Clamping piece (10) according to the preceding claim, characterized in that the contour of said first cylinder (21) forms a predetermined angle (X) with respect to the vertical, so as to allow the forced mounting of the accessory clamping device (13) at the end of the clamping bit (10). 8. Embout de bridage (10) selon l'une des revendications 6 et 7, caractérisé en ce que ledit premier cylindre (21) a une épaisseur (el) de l'ordre de 5mm à 20mm, avec un diamètre (dl) de l'ordre de 12mm, et ledit second cylindre (22) a une épaisseur (e2) de l'ordre de 5mm à 15mm, avec un diamètre (d2) de l'ordre de 18mm, pour un diamètre (d) de l'embout de bridage (10) de l'ordre de 18mm. 8. Clamping end (10) according to one of claims 6 and 7, characterized in that said first cylinder (21) has a thickness (el) of the order of 5mm to 20mm, with a diameter (dl) of the order of 12mm, and said second cylinder (22) has a thickness (e2) of the order of 5mm to 15mm, with a diameter (d2) of the order of 18mm, for a diameter (d) of the clamping tip (10) of the order of 18mm. 9. Embout de bridage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit accessoire de bridage (13) est réalisé en un matériau transparent du type verre, quartz ou saphir. 9. clamping tip (10) according to any one of the preceding claims, characterized in that said clamping accessory (13) is made of a transparent material such as glass, quartz or sapphire. 10. Embout de bridage (10) selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ledit accessoire de bridage (13) est réalisé en un matériau transparent du type matière plastique ou matière thermoplastique. 10 10. Clamping bit (10) according to any one of claims 1 to 8, characterized in that said clamping accessory (13) is made of a transparent material of the plastic or thermoplastic material type. 10
FR1161322A 2011-12-08 2011-12-08 CLAMPING PITCH EQUIPPED WITH A CLAMPING ATTACHMENT FOR A TWO PIECES CONNECTION DEVICE BY TRANSPARENT LASER WELDING AND METHOD OF REPLACING SUCH AN ACCESSORY Active FR2983768B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1161322A FR2983768B1 (en) 2011-12-08 2011-12-08 CLAMPING PITCH EQUIPPED WITH A CLAMPING ATTACHMENT FOR A TWO PIECES CONNECTION DEVICE BY TRANSPARENT LASER WELDING AND METHOD OF REPLACING SUCH AN ACCESSORY

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1161322A FR2983768B1 (en) 2011-12-08 2011-12-08 CLAMPING PITCH EQUIPPED WITH A CLAMPING ATTACHMENT FOR A TWO PIECES CONNECTION DEVICE BY TRANSPARENT LASER WELDING AND METHOD OF REPLACING SUCH AN ACCESSORY

Publications (2)

Publication Number Publication Date
FR2983768A1 true FR2983768A1 (en) 2013-06-14
FR2983768B1 FR2983768B1 (en) 2014-11-07

Family

ID=45992317

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1161322A Active FR2983768B1 (en) 2011-12-08 2011-12-08 CLAMPING PITCH EQUIPPED WITH A CLAMPING ATTACHMENT FOR A TWO PIECES CONNECTION DEVICE BY TRANSPARENT LASER WELDING AND METHOD OF REPLACING SUCH AN ACCESSORY

Country Status (1)

Country Link
FR (1) FR2983768B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11819942B2 (en) 2020-12-10 2023-11-21 Magna International Inc. Method and apparatus for applying an active joining force during laser welding of overlapping workpieces

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249740A (en) * 1985-04-29 1986-11-06 Toyota Motor Corp Mechanical joining method for different kind materials
EP1036644A1 (en) * 1999-03-16 2000-09-20 Emerson Electric Co. Method and apparatus for deforming a thermoplastic projection using laser energy
US20070131401A1 (en) * 2005-12-09 2007-06-14 Siemens Vdo Automotive, Inc. Laser welded plastic intercooler
JP2009012239A (en) * 2007-07-03 2009-01-22 Nippon Avionics Co Ltd Apparatus and method for laser resin welding
KR20090059429A (en) * 2007-12-06 2009-06-11 주식회사 엘티에스 Device joining light module for vehicle
DE102009043376A1 (en) * 2009-09-29 2011-04-21 Lmb Automation Gmbh Device for joining two joint parts e.g. airbag components, of motor vehicle, has pressure element partially transparent to laser radiation and assigning feed device for feed of pressure element relative to joint parts
CN102079135A (en) * 2010-12-24 2011-06-01 中国科学院长春光学精密机械与物理研究所 Three-dimensional laser plastic welding processing head
WO2011138568A1 (en) * 2010-05-07 2011-11-10 Renault S.A.S. Device for assembling two parts made from thermoplastic materials by means of laser-transparent welding, assembly method and associated clamping fitting

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249740A (en) * 1985-04-29 1986-11-06 Toyota Motor Corp Mechanical joining method for different kind materials
EP1036644A1 (en) * 1999-03-16 2000-09-20 Emerson Electric Co. Method and apparatus for deforming a thermoplastic projection using laser energy
US20070131401A1 (en) * 2005-12-09 2007-06-14 Siemens Vdo Automotive, Inc. Laser welded plastic intercooler
JP2009012239A (en) * 2007-07-03 2009-01-22 Nippon Avionics Co Ltd Apparatus and method for laser resin welding
KR20090059429A (en) * 2007-12-06 2009-06-11 주식회사 엘티에스 Device joining light module for vehicle
DE102009043376A1 (en) * 2009-09-29 2011-04-21 Lmb Automation Gmbh Device for joining two joint parts e.g. airbag components, of motor vehicle, has pressure element partially transparent to laser radiation and assigning feed device for feed of pressure element relative to joint parts
WO2011138568A1 (en) * 2010-05-07 2011-11-10 Renault S.A.S. Device for assembling two parts made from thermoplastic materials by means of laser-transparent welding, assembly method and associated clamping fitting
CN102079135A (en) * 2010-12-24 2011-06-01 中国科学院长春光学精密机械与物理研究所 Three-dimensional laser plastic welding processing head

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 200943, Derwent World Patents Index; AN 2009-K58097, XP002679989 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11819942B2 (en) 2020-12-10 2023-11-21 Magna International Inc. Method and apparatus for applying an active joining force during laser welding of overlapping workpieces

Also Published As

Publication number Publication date
FR2983768B1 (en) 2014-11-07

Similar Documents

Publication Publication Date Title
EP2566684B1 (en) Device for assembling two parts made from thermoplastic materials by means of laser-transparent welding, assembly method and associated clamping fitting
EP0720935B1 (en) Device for precise positioning of a bumper to a vehicle fender portion
EP3010689B1 (en) Device and process for cutting metallic or composite parts
EP2566683B1 (en) Device for assembling two parts made from thermoplastic materials by means of laser-transparent welding and associated assembly method
EP0684120A1 (en) Method for including a decoration, in particular textile, in a plastic part
FR2972121A1 (en) METHOD FOR INSTALLING A HOLLOW RIVET RIVET, RIVET AND ADJUSTABLE INSTALLATION TOOL
CA2366937C (en) Forming equipment for polymerisation of shaped parts in composite material
FR2983768A1 (en) Clamping fitting for assembling device of transparent upper part and absorbent lower part of car, has clamping accessory made of material resistant to force applied to upper surface and to friction generated by displacement of accessory
EP2020610A1 (en) Lighting device comprising an L-shaped light guide equipped with means for exploiting light leaks
EP3350005A1 (en) Device for sealing the air intake of a motor vehicle, corresponding front-end module and motor vehicle
EP3922511B1 (en) Method for attachment by welding of an interface support on a profile of a vehicle seat rail
EP2771153B1 (en) Painting workpiece gripper for handling robot
WO2015177418A1 (en) Motor vehicle roof braze welded to the sides of the body shell
EP1854707A1 (en) Connector for making a longitudinal for a motor vehicle and longitudinal comprising such a connector
EP3200971B1 (en) Two-part assembly of a lighting device by mirror welding via expander ribs
FR3072322A1 (en) PIECE OF COMPOSITE MATERIAL WITH METALLIC INSERT
EP2651623A1 (en) Arrangement of two parts made of thermoplastic materials to be assembled by laser welding
EP3377374B1 (en) System for assembling two parts with built-in guide member and locking element
FR2928100A1 (en) METHOD FOR MANUFACTURING A STRUCTURAL PIECE OF A MOTOR VEHICLE AND SUCH A PART
EP2855077A1 (en) System and process for transparent laser welding of parts, employing independent protective and clamping elements
FR3046738A1 (en) METHOD AND APPARATUS FOR ASSEMBLY BY LASER WELDING BY TRANSPARENCY OF A FIRST PART COMPRISING AT LEAST ONE BONDING ELEMENT WITH A SECOND PIECE
EP2955003B1 (en) Laser welding machine for assembling a housing and a lens of a motor vehicle headlight
FR3043436A1 (en)
EP4347213A1 (en) Heating apparatus for performing localised thermal activation of a composite part
FR3026697A1 (en) AIRBAG SHUTTER, METHOD AND DEVICE FOR PRODUCING THE SHUTTER

Legal Events

Date Code Title Description
PLFP Fee payment

Year of fee payment: 5

PLFP Fee payment

Year of fee payment: 6

PLFP Fee payment

Year of fee payment: 7

PLFP Fee payment

Year of fee payment: 9

PLFP Fee payment

Year of fee payment: 10

PLFP Fee payment

Year of fee payment: 11

PLFP Fee payment

Year of fee payment: 12

CA Change of address

Effective date: 20221121