EP2323804A1 - D'un element pour former une lentille; dispositif, element de ce dispositif et raccord pour la mise en oeuvre de ce procede - Google Patents

D'un element pour former une lentille; dispositif, element de ce dispositif et raccord pour la mise en oeuvre de ce procede

Info

Publication number
EP2323804A1
EP2323804A1 EP09800111A EP09800111A EP2323804A1 EP 2323804 A1 EP2323804 A1 EP 2323804A1 EP 09800111 A EP09800111 A EP 09800111A EP 09800111 A EP09800111 A EP 09800111A EP 2323804 A1 EP2323804 A1 EP 2323804A1
Authority
EP
European Patent Office
Prior art keywords
laser radiation
contact surface
lens
lens portion
laser
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.)
Withdrawn
Application number
EP09800111A
Other languages
German (de)
English (en)
Inventor
Philippe Blivet
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.)
Parker Hannifin Manufacturing France SAS
Original Assignee
Legris SA
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 Legris SA filed Critical Legris SA
Publication of EP2323804A1 publication Critical patent/EP2323804A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • 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
    • B29C65/1638—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 focusing the laser beam on the interface
    • 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
    • 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
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • 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
    • B29C65/1674—Laser beams characterised by the way of heating the interface making use of laser diodes
    • 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
    • B29C65/1687—Laser beams making use of light guides
    • B29C65/169—Laser beams making use of light guides being a part of the joined article
    • 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
    • B29C65/1687—Laser beams making use of light guides
    • B29C65/169—Laser beams making use of light guides being a part of the joined article
    • B29C65/1693—Laser beams making use of light guides being a part of the joined article in the form of a cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot 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
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • 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
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • B29C66/3452—Making complete joints by combining partial joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • B29C66/65—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 with a relative motion between the article and the welding tool
    • 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
    • B29C66/65—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 with a relative motion between the article and the welding tool
    • B29C66/652—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 with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • 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
    • B29C66/733—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7334—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being glossy or matt, reflective or refractive
    • B29C66/73343—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being glossy or matt, reflective or refractive at least one of the parts to be joined being matt or refractive
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8262—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using "pressure means" which are associated with at least one of the parts to be joined and remain in or on it
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic material
    • B23K2103/42—Plastics
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • 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
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • 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
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • 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
    • B29C65/1696—Laser beams making use of masks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • 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
    • B29K2995/0025—Opaque
    • 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
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]

Definitions

  • the present invention relates to a method of manufacturing a device implementing a laser welding operation.
  • the invention also relates to such a device and an element of such a device.
  • Such an element is, for example, a connector that can be used for producing a member of a fluid transport circuit, such as a transmitting member or a fluid receiving member.
  • Laser welding is a fastening method which is now widely used to attach to each other a material element opaque to laser radiation and an element of material transparent to laser radiation.
  • the opaque material will heat up under the effect of laser radiation and cause conduction heating of the transparent material. If the power of the radiation is sufficient, the heating will cause a local melting of the materials in the vicinity of the point of focus of the radiation.
  • the formation of a weld bead is obtained by the relative displacement of the focusing point of the radiation and the elements.
  • the laser radiation is derived from an optical assembly comprising a radiation source and one or more lenses for focusing the laser radiation.
  • the radiation source is for example made of laser diodes.
  • the focusing lens focuses the radiation into the desired weld area and is optionally movable to create a weld bead.
  • the focusing lens is particularly useful in the case of use of laser diodes as a source of radiation because laser diodes produce a more divergent beam than conventional YAG or CO2 lasers.
  • the focusing lens is normally made of a material transparent to the radiation but always has impurities that will react with the laser radiation, eventually leading to an alteration of the optical properties of the lens requiring the replacement thereof.
  • Lens cooling devices are generally provided to prevent heating under the effect of laser radiation which could damage the lens.
  • the lens should normally be as close as possible to the welding zone but this promotes its fouling and makes it difficult to move the elements to be welded and maintenance operations.
  • Moving the lens is complex and requires the use of moving optical elements, such as mirrors and prisms, to conduct radiation from the radiation source to the lens.
  • An object of the invention is to propose a means to overcome all or part of these disadvantages.
  • the invention relates to a method of manufacturing a first and second elements assembled by laser welding, the first element being made of material at least partially opaque to laser radiation and the second element being made of a transparent material.
  • the device comprising the first element and the second element in contact with each other by a contact surface, the steps of: body of the first element of a material such that the body is at least partially opaque to laser radiation at least at the contact surface, making a body of the second element of a material such that the body is transparent to laser radiation at least between the contact surface and an input surface of the laser radiation in the body, providing a portion of the body to form at least one refractive lens of said laser radiation,
  • the lens portion being arranged to shape the laser radiation in at least one laser radiation impact zone on said contact surface.
  • the heating and melting of the contact surface of the first element will cause by conduction the heating and melting of the contact surface of the second element.
  • shapeing is meant any optical treatment capable of modifying the shape, density or energy distribution of the laser radiation in the area of impact of the laser radiation on the contact surface.
  • the lens is directly integrated with one of the elements to be welded. The lens is thus disposed as close to the welding zone without hindering the movements of the elements to be welded or the maintenance operations. The lens is furthermore used only once so that it is not subject to significant wear.
  • the optical properties of the lens may be poorer than those of a conventional external lens.
  • the integration of the lens in the second element makes it possible to correct, at least in part, the relative positioning errors, in the six degrees of freedom, of the elements with respect to the radiation source, increasing the tolerance of the method to these positioning errors. but also to the dimensional variations of the elements.
  • Radiation that does not pass through the lens further increases the temperature of the first element and decreases the temperature gradient on the contact surface thereof between the welded zones and the non-welded zones.
  • the lens portion is arranged to concentrate the laser radiation in the impact zone.
  • the lens then allows the realization of a spot weld.
  • the lens portion is arranged to produce a plurality of solder points.
  • the lens thus allows the simultaneous realization of several soldering points from a single radiation.
  • the lens portion is arranged such that the weld points overlap and preferably each weld point has an elongate shape.
  • the lens thus arranged allows the realization of a continuous weld.
  • the laser radiation has a transverse dimension greater than a maximum transverse dimension of the lens portion.
  • the elements applied against each other regardless of the angular orientation of the elements relative to the laser radiation. It is thus possible to perform a series welding by limiting as much as possible the positioning stresses of the elements with respect to the laser radiation.
  • the invention also relates to a device obtained by the method of the invention, this device comprises at least a first element and a second element in contact with each other by a contact surface and welded one. at the other at the contact surface, characterized in that:
  • the first element has a body made of a material at least partially opaque to laser radiation at least at the level of the contact surface
  • the second element has a body made of a material transparent to laser radiation at least between the contact surface and an input surface of the laser radiation in the body, the body comprising a portion forming at least one refractive lens of said laser radiation towards the contact surface of the first element.
  • the invention further relates to an element used in the manufacture of such a device, this element has a body made of a material transparent to a laser radiation to which the body would be subjected, the material being transparent to laser radiation at least between an input surface of the laser radiation in the body and an output surface of the laser radiation, the body having a portion forming at least one refractive lens of said laser radiation for shaping an area of impact of the laser radiation on a surface contact of another element that would be applied against the exit surface of the laser radiation.
  • the invention also relates to a coupling comprising a body delimiting a reception recess of a pipe end, the body being made of a material transparent to a laser radiation to which the body would be subjected, the material being transparent to laser radiation at least between a outer surface of the body and a recess wall, the body having a portion forming at least one refractive lens of said laser radiation for shaping an impact area of the laser radiation with an outer surface of a driving end that would be received in the room.
  • FIG. 1 is a diagrammatic view in perspective illustrating the principle of a welding operation according to a first mode of implementation of the method of the invention
  • FIG. 2 is a diagrammatic sectional view along plane II of FIG. 1,
  • FIG. 3 is a view similar to FIG. 1 of a first variant embodiment
  • FIG. 4 is a view analogous to FIG. 1 of a second variant embodiment
  • FIG. 5 is a view similar to FIG. 1, illustrating the principle of a welding operation according to a second mode of implementation. implementation of this process
  • FIG. 6 is a diagrammatic sectional view along plane VI of FIG. 5,
  • FIG. 7 is a schematic perspective view showing a welding operation according to a third mode of implementation.
  • FIG. 8 is a perspective view illustrating the application of the first embodiment to the welding of a coupling on a pipe end, the first variant is shown on the left side of the coupling and the second variant on the part.
  • FIG. 9 is a partial view in section along the plane IX of FIG. 8. DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS. 1 and 2, the process according to the invention is intended for the manufacture of a device comprising at least a first element 1 and a second element 2, here plates, in contact with each other by a contact surface 3, 4.
  • the method comprises a step of manufacturing the elements 1, 2 and a step of welding the elements 1, 2 to one another by means of laser radiation.
  • the process of the invention begins with the production of elements 1 and 2.
  • the first element 1 is here produced by a conventional method of injecting a thermoplastic material in a mold not shown to form the body of the first element 1.
  • the material used is a material opaque to laser radiation.
  • the second element 2 (shown for clarity in transparency in Figure 1 and in general perspective views) is here produced by a conventional method of injecting a thermoplastic material in a mold not shown to form the body of the second element 2.
  • the material used is a material transparent to laser radiation.
  • the mold has an imprint arranged to form on a portion 5 of the body of the second element 2 of the lens 6 of focusing of said laser radiation.
  • the lens 6 opens on a surface 7 of the opposite body and here parallel to the contact surface 4.
  • the thermoplastic materials used are of course weldable one on the other. In this case, the same material is used for both elements.
  • This material, which is transparent to the base of the laser radiation, has been made opaque for the first element by adding a filler such as carbon black.
  • the contact surface 4 of the second element 2 is applied to the contact surface 3 of the first element 1.
  • a source 8 of laser radiation here a strip of laser diodes, is directed towards the surface 7.
  • the laser radiation is of the infrared type and comprises a plurality of parallel beams each directed towards one of the lenses 6.
  • Each lens 6 focuses the laser radiation on the contact surface 3 of the first element 1 so as to melt the contact surface 3 of the first element 1.
  • the heat thus produced is transferred by conduction to the contact surface 4 of the second element 2 causing the melting of said contact surface 4 and the welding of the second element 2 to the first element 1.
  • the application force exerted on the elements allows to control the interpenetration of materials and the entanglement of their macromolecular chains.
  • the surface 7 forms an input surface of the laser radiation in the second element 2 and the contact surface 4 forms an exit surface of the laser radiation from the second element.
  • Each lens 6 is here of convex shape to concentrate the laser radiation in a reduced area of the contact surface 3 so as to have a fast melting with a relatively low power. More specifically, each lens 6 has an elliptical profile and is wider than it is tall to change the energy distribution of the laser radiation in the area of impact of the laser radiation on the contact surface 3 by concentrating the energy in the center of the laser. the impact zone. The lenses 6 thus produce a plurality of melting points spaced apart from each other.
  • the lens 6 may have an elongated shape parallel to the surface 7 and a relative displacement of the elements and the laser radiation is then performed to subject the entire lens 6 to the laser radiation.
  • the relative displacement is obtained by moving the output of the laser radiation source along the lens 6 or by moving the elements relative to the output of the laser radiation source. It is thus obtained a continuous weld.
  • the laser radiation is produced in the form of a single beam of rectangular section covering several lenses 6.
  • the laser radiation is emitted on the lenses 6 in a direction inclined with respect to the contact surface 3, 4.
  • the lenses 6 are concave in shape to enlarge the laser beam they transmit so as to produce partially overlapping weld points to form a continuous weld.
  • the lens 6 has an elongate shape and extends along a closed line.
  • the lens 6 thus has the shape of the weld bead to be produced.
  • the laser radiation source is arranged to form laser radiation in the form of a sheet of rectangular cross-section such that the laser radiation has a transverse dimension A (the length of the rectangular section) greater than a maximum transverse dimension B of the portion 5 forming the lens 6. This allows to achieve the welding seam by scrolling, facing the laser radiation, the elements 1, 2 superimposed regardless of their orientation.
  • the dimension A is here equal to the largest dimension of the device.
  • the elements 1, 2 applied to one another are arranged on a conveyor belt 30 which runs under the radiation source.
  • the belt 30 here has edges 31 separated by a distance equal to the dimension A.
  • the devices formed by the elements 1, 2 with the element 2 directed towards the laser radiation source can be arranged on the carpet with any orientation.
  • the connector 20 comprises a body 21 defining at each of its ends a recess 22.1, 22.2 for receiving a pipe end 23.1, 23.2.
  • the body 21 is made of a material transparent to laser radiation to which the body would be subjected during the manufacturing process.
  • the material being transparent to laser radiation at least between an outer surface 24 of the body and a wall 25.1, 25.2 of the recess 22.1, 22.2.
  • the body 21 comprising a portion forming at least one focusing lens 26 of said laser radiation in the recess 22.1, 22.2 near the wall 25.1,
  • the lenses 26 are here two in number at each end of the body 1 and each has the shape of a convex annular bead ensuring a focus of the laser radiation and an enlargement thereof in a circumferential direction of the wall 25.1, 25.2.
  • the pipe ends 23.1, 23.2 are force-fitted into the recesses 22.1, 22.2 so that the outer surface of each pipe end 23.1, 23.2 is applied with a pressing force against the wall 25.1, 25.2 of the recesses 22.1,
  • Laser radiation comprising a beam for each lens 26 (recessing 22.1) or a beam for two lenses 26 (recessing 22.2) are then emitted in a radial direction of the fitting 20 on the lenses 26.
  • the focusing point is on the outer surface at each end of line 23.1,
  • the surface 24 forms an entrance surface of the laser radiation in the connector and the wall 25.1, 25.2 forms an exit surface of the laser radiation out of the connection.
  • the body of the first member may be partially opaque at least at the contact surface and the body of the second member may be partially transparent but at least between the contact surface and an entry surface of the laser radiation in the body.
  • the lens portion may comprise one or more lenses.
  • the lens portion 6 is arranged to produce a weld spot or a plurality of overlapping or non-overlapping spots.
  • Each impact zone forming the weld points can have a circular or elongated shape or other.
  • the lens may also have a profile in a portion of a circle or parabola.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Laser Beam Processing (AREA)

Abstract

La présent demande décrit un procédé de fabrication d'un dispositif comportant deux éléments (23, 21) assemblés par soudage laser, l'un des éléments (21) comportant une lentille de réfraction (26) du rayonnement laser sur l'autre élément (23). Cette demande décrit aussi un dispositif ainsi obtenu, un élément de ce dispositif et un raccord pour la mise en oeuvre de ce procédé.

Description

D'UN ELEMENT POUR FORMER UNE LENTILLE; DISPOSITIF, ELEMENT DE CE DISPOSITIF ET RACCORD POUR LA MISE EN OEUVRE DE CE PROCEDE
La présente invention concerne un procédé de fabrication d'un dispositif mettant en œuvre une opération de soudage laser. L'invention concerne également un tel dispositif et un élément d'un tel dispositif. Un tel élément est par exemple un raccord utilisable pour la réalisation d'un organe d'un circuit de transport de fluide, comme un organe émetteur ou récepteur de fluide .
ARRIERE PLAN DE L'INVENTION
Le soudage laser est un procédé de fixation qui est maintenant largement utilisé pour fixer l'un à l'autre un élément en matériau opaque à un rayonnement laser et un élément en matériau transparent au rayonnement laser. Lorsque ces éléments sont soumis à un tel rayonnement focalisé dans une zone de contact mutuel des éléments, le matériau opaque va s'échauffer sous l'effet du rayonnement laser et provoquer par conduction un échauffement du matériau transparent. Si la puissance du rayonnement est suffisante, l ' échauffement engendrera une fusion locale des matériaux au voisinage du point de focalisation du rayonnement. La formation d'un cordon de soudure est obtenue par le déplacement relatif du point de focalisation du rayonnement et des éléments.
Le rayonnement laser est issu d'un ensemble optique comportant une source de rayonnement et une ou plusieurs lentilles de focalisation du rayonnement laser. La source de rayonnement est par exemple constituée de diodes laser. La lentille de focalisation assure la focalisation du rayonnement dans la zone de soudage souhaitée et est éventuellement mobile pour créer un cordon de soudure. La lentille de focalisation est particulièrement utile dans le cas d'utilisation de diodes laser comme source de rayonnement car les diodes laser produisent un faisceau plus divergent que les lasers classique de type YAG ou CO2. La lentille de focalisation est normalement en un matériau transparent au rayonnement mais comporte toujours des impuretés qui vont réagir avec le rayonnement laser, entraînant à terme une altération des propriétés optiques de la lentille obligeant au remplacement de celle-ci . Il est généralement prévu des dispositifs de refroidissement des lentilles pour prévenir un échauffement sous l'effet du rayonnement laser qui risquerait de détériorer la lentille. La lentille doit normalement être le plus près possible de la zone de soudage mais ceci favorise son encrassement et rend difficile les déplacements des éléments à souder et les interventions de maintenance. La réalisation de déplacements de la lentille est complexe et nécessite de recourir à des éléments optiques mobiles, comme des miroirs et des prismes, permettant de conduire le rayonnement de la source de rayonnement jusqu'à la lentille.
Pour obvier à cette dernière difficulté, il est connu de déplacer les éléments à souder par rapport à la lentille. Toutefois, un tel déplacement est parfois impossible, notamment lorsque l'un des éléments à assembler présente une grande dimension dans une direction. Tel est le cas par exemple lors du soudage d'un raccord à une extrémité d'une conduite de plusieurs mètres .
Par ailleurs, le changement des dimensions des éléments d'une série d'éléments à une autre oblige à régler la focalisation pour s'adapter aux dimensions de la nouvelle série.
OBJET DE L'INVENTION Un but de l ' invention est de proposer un moyen permettant de s'affranchir de tout ou partie de ces inconvénients .
RESUME DE L ' INVENTION
A cet effet, l'invention concerne un procédé de fabrication d'un premier et d'un deuxième éléments assemblés par soudage laser, le premier élément étant en matériau au moins partiellement opaque à un rayonnement laser et le deuxième élément étant en un matériau transparent au rayonnement laser et comportant une lentille de réfraction du rayonnement vers le premier élément pour souder le premier élément sur le deuxième élément lorsque le premier élément et le deuxième éléments sont appliqués l'un contre l'autre et que le rayonnement laser est dirigé vers la lentille.
On prévoit, dans le mode de mise en œuvre préféré du procédé de l'invention, le dispositif comportant le premier élément et le deuxième élément en contact l'un avec l'autre chacun par une surface de contact, les étapes de : réaliser un corps du premier élément en un matériau tel que le corps soit au moins partiellement opaque à un rayonnement laser au moins au niveau de la surface de contact, réaliser un corps du deuxième élément en un matériau tel que le corps soit transparent au rayonnement laser au moins entre la surface de contact et une surface d'entrée du rayonnement laser dans le corps, en ménageant une portion du corps pour former au moins une lentille de réfraction dudit rayonnement laser,
- appliquer la surface de contact du deuxième élément sur la surface de contact du premier élément et diriger au moins une source de rayonnement laser vers la surface d'entrée du deuxième élément de manière à fondre la surface de contact du premier élément et souder le deuxième élément sur le premier élément, la portion formant lentille étant agencée pour mettre en forme le rayonnement laser dans au moins une zone d'impact du rayonnement laser sur ladite surface de contact.
L' échauffement et la fusion de la surface de contact du premier élément vont provoquer par conduction l ' échauffement et la fusion de la surface de contact du deuxième élément. Par "mettre en forme", on entend tout traitement optique apte à modifier la forme, la densité ou la répartition d'énergie du rayonnement laser dans la zone d'impact du rayonnement laser sur la surface de contact. Pour le procédé de l'invention, la lentille est directement intégrée à l'un des éléments à souder. La lentille est ainsi disposée au plus près de la zone de soudage sans pour autant gêner les déplacements des éléments à souder ou les interventions de maintenance. La lentille n'est en outre utilisée qu'une seule fois de sorte qu'elle n'est pas soumise à une usure importante. Les propriétés optiques de la lentille peuvent être moins bonnes que celles d'une lentille externe classique. L'intégration de la lentille dans le deuxième élément permet de corriger au moins en partie les erreurs de positionnement relatif, dans les six degrés de liberté, des éléments par rapport à la source de rayonnement, augmentant la tolérance du procédé à ces erreurs de positionnement mais également aux variations dimensionnelles des éléments. Le rayonnement qui ne passe pas par la lentille augmente en outre la température du premier élément et diminue le gradient de température sur la surface de contact de celui-ci entre les zones soudées et les zones non soudées . Avantageusement, la portion formant lentille est agencée pour concentrer le rayonnement laser dans la zone d' impact .
La lentille permet alors la réalisation d'une soudure ponctuelle. Selon un mode particulier de mise en œuvre, la portion formant lentille est agencée pour produire une pluralité de points de soudure.
La lentille permet ainsi la réalisation simultanée de plusieurs points de soudure à partir d'un rayonnement unique.
Avantageusement alors, la portion formant lentille est agencée de telle manière que les points de soudure se chevauchent et, de préférence, chaque point de soudure a une forme allongée. La lentille ainsi agencée permet la réalisation d'une soudure continue.
De préférence le rayonnement laser présente une dimension transversale supérieure à une dimension transversale maximale de la portion formant lentille. Ainsi, il suffit de faire défiler sous le rayonnement laser les éléments appliqués l'un contre l'autre (le deuxième élément étant orienté vers le rayonnement laser) quelle que soit l'orientation angulaire des éléments par rapport au rayonnement laser . II est ainsi possible de réaliser d'un soudage en série en limitant au maximum les contraintes de positionnement des éléments par rapport au rayonnement laser.
L'invention a également pour objet un dispositif obtenu par le procédé de l'invention, ce dispositif comporte au moins un premier élément et un deuxième élément en contact l'un avec l'autre chacun par une surface de contact et soudés l'un à l'autre au niveau de la surface de contact, caractérisé en ce que :
- le premier élément a un corps en un matériau au moins partiellement opaque à un rayonnement laser au moins au niveau de la surface de contact,
- le deuxième élément a un corps en un matériau transparent au rayonnement laser au moins entre la surface de contact et une surface d'entrée du rayonnement laser dans le corps, le corps comportant une portion formant au moins une lentille de réfraction dudit rayonnement laser vers la surface de contact du premier élément.
L'invention a en outre pour objet, un élément entrant dans la fabrication d'un tel dispositif, cet élément a un corps en un matériau transparent à un rayonnement laser auquel serait soumis le corps, le matériau étant transparent au rayonnement laser au moins entre une surface d'entrée du rayonnement laser dans le corps et une surface de sortie du rayonnement laser, le corps comportant une portion formant au moins une lentille de réfraction dudit rayonnement laser pour mettre en forme une zone d'impact du rayonnement laser sur une surface de contact d'un autre élément qui serait appliquée contre la surface de sortie du rayonnement laser.
L'invention concerne aussi un raccord comportant un corps délimitant un chambrage de réception d'une extrémité de conduite, le corps étant en un matériau transparent à un rayonnement laser auquel serait soumis le corps, le matériau étant transparent au rayonnement laser au moins entre une surface externe du corps et une paroi du chambrage, le corps comportant une portion formant au moins une lentille de réfraction dudit rayonnement laser pour mettre en forme une zone d'impact du rayonnement laser avec une surface externe d'une extrémité de conduite qui serait reçue dans le chambrage.
D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui suit de modes de réalisation particuliers non limitatifs de l'invention.
BREVE DESCRIPTION DES DESSINS
II sera fait référence aux dessins annexés, parmi lesquels : - la figure 1 est une vue schématique en perspective illustrant le principe d'une opération de soudage selon un premier mode de mise en œuvre du procédé de l'invention,
- la figure 2 est une vue schématique en coupe selon le plan II de la figure 1,
- la figure 3 est une vue analogue à la figure 1 d'une première variante de mise en œuvre,
- la figure 4 est une vue analogue à la figure 1 d'une deuxième variante de mise en œuvre, - la figure 5 est une vue analogue à la figure 1 illustrant le principe d'une opération de soudage selon un deuxième mode de mise en œuvre de ce procédé,
- la figure 6 est une vue schématique en coupe selon le plan VI de la figure 5,
- la figure 7 est une vue schématique en perspective montrant une opération de soudage selon un troisième mode de mise en œuvre,
- la figure 8 est une vue en perspective illustrant l'application du premier mode de mise en œuvre au soudage d'un raccord sur une extrémité de conduite, la première variante est représentée sur la partie gauche du raccord et la deuxième variante sur la partie droite, - la figure 9 est vue partielle en coupe selon le plan IX de la figure 8. DESCRIPTION DETAILLEE DE L'INVENTION En référence aux figures 1 et 2 , le procédé conforme à l'invention est destiné à la fabrication d'un dispositif comportant au moins un premier élément 1 et un deuxième élément 2, ici des plaques, en contact l'un avec l'autre chacun par une surface de contact 3, 4.
Le procédé comporte une étape de fabrication des éléments 1, 2 et une étape de soudage des éléments 1, 2 l'un à l'autre au moyen d'un rayonnement laser. Le procédé de l ' invention débute par la réalisation des éléments 1 et 2.
Le premier élément 1 est ici réalisé selon un procédé classique d'injection d'un matériau thermoplastique dans un moule non représenté pour former le corps du premier élément 1. Le matériau utilisé est un matériau opaque au rayonnement laser.
Le deuxième élément 2 (représenté pour plus de clarté en transparence sur la figure 1 et d'une manière générale sur les vues en perspectives) est ici réalisé selon un procédé classique d'injection d'un matériau thermoplastique dans un moule non représenté pour former le corps du deuxième élément 2. Le matériau utilisé est un matériau transparent au rayonnement laser. Le moule a une empreinte agencée pour former sur une portion 5 du corps du deuxième élément 2 des lentilles 6 de focalisation dudit rayonnement laser. La lentille 6 débouche sur une surface 7 du corps opposée et ici parallèle à la surface de contact 4. Les matériaux thermoplastiques utilisés sont bien évidemment soudables l'un sur l'autre. En l'espèce, le même matériau est utilisé pour les deux éléments. Ce matériau, transparent à la base au rayonnement laser a été rendu opaque pour le premier élément en y ajoutant une charge telle que du noir de carbone.
Une fois les éléments 1, 2 fabriqués, la surface de contact 4 du deuxième élément 2 est appliquée sur la surface de contact 3 du premier élément 1. Une source 8 de rayonnement laser, ici une barrette de diodes laser, est dirigée vers la surface 7. Le rayonnement laser est du type infrarouge et comporte plusieurs faisceaux parallèles dirigés chacun vers une des lentilles 6. Chaque lentille 6 focalise le rayonnement laser sur la surface de contact 3 du premier élément 1 de manière à fondre la surface de contact 3 du premier élément 1. La chaleur ainsi produite est transférée par conduction à la surface de contact 4 du deuxième élément 2 provoquant la fusion de ladite surface de contact 4 et la soudure du deuxième élément 2 sur le premier élément 1. L'effort d'application exercé sur les éléments permet de contrôler 1 ' interpénétration des matériaux et l ' enchevêtrement de leurs chaînes macromoléculaires .
On notera que la surface 7 forme une surface d'entrée du rayonnement laser dans le deuxième élément 2 et la surface de contact 4 forme une surface de sortie du rayonnement laser hors du deuxième élément.
Chaque lentille 6 est ici de forme convexe pour concentrer le rayonnement laser en une zone réduite de la surface de contact 3 de manière à avoir une fusion rapide avec une puissance relativement faible. Plus précisément, chaque lentille 6 a un profil en ellipse et est plus large que haute pour modifier la répartition d'énergie du rayonnement laser dans la zone d'impact du rayonnement laser sur la surface de contact 3 en concentrant l'énergie au centre de la zone d'impact. Les lentilles 6 produisent ainsi une pluralité de points de fusion espacés les uns des autres .
La lentille 6 peut avoir une forme allongée parallèlement à la surface 7 et un déplacement relatif des éléments et du rayonnement laser est alors réalisé pour soumettre la totalité de la lentille 6 au rayonnement laser. Le déplacement relatif est obtenu en déplaçant la sortie de la source de rayonnement laser le long de la lentille 6 ou en déplaçant les éléments par rapport à la sortie de la source de rayonnement laser. Il est ainsi obtenu une soudure continue. En variante, comme représenté sur la figure 3, le rayonnement laser est produit sous la forme d'un faisceau unique de section rectangulaire couvrant plusieurs lentilles 6. Selon une autre variante représentée à la figure 4, le rayonnement laser est émis sur les lentilles 6 selon une direction inclinée par rapport à la surface de contact 3, 4. Les éléments identiques ou analogues à ceux précédemment décrits porteront des références numériques identiques à ces derniers dans la description qui suit des deuxième et troisième modes de mise en œuvre.
Dans le deuxième mode de mise en œuvre représenté aux figures 5 et 6, les lentilles 6 sont de forme concave pour élargir le faisceau laser qu'elles transmettent de manière à produire des points de soudure se chevauchant partiellement pour former une soudure continue.
Dans le troisième mode de réalisation représenté à la figure 7, la lentille 6 a une forme allongée et s'étend selon une ligne fermée. La lentille 6 a ainsi la forme du cordon de soudure à réaliser. La source de rayonnement laser est agencée pour former un rayonnement laser sous forme d'une nappe de section ici rectangulaire telle que le rayonnement laser présente une dimension transversale A (la longueur de la section rectangulaire) supérieure à une dimension transversale maximale B de la portion 5 formant la lentille 6. Ceci permet de réaliser le cordon de soudure par défilement, en regard du rayonnement laser, des éléments 1, 2 superposés sans tenir compte de leur orientation.
La dimension A est ici égale à la plus grande dimension du dispositif. Les éléments 1, 2 appliqués l'un sur l'autre sont disposés sur un tapis roulant 30 qui défile sous la source de rayonnement. Le tapis 30 a ici des bords 31 écartés d'une distance égale à la dimension A.
On comprend que les dispositifs formés par les éléments 1, 2 avec l'élément 2 dirigé vers la source de rayonnement laser peuvent être disposés sur le tapis avec une orientation quelconque .
L'application à un raccord du procédé selon le premier mode de mise en œuvre de l'invention va maintenant être décrite. Le raccord 20 comporte un corps 21 délimitant à chacune de ses extrémités un chambrage 22.1, 22.2 de réception d'une extrémité de conduite 23.1, 23.2.
Le corps 21 est en un matériau transparent à un rayonnement laser auquel serait soumis le corps lors du procédé de fabrication. Le matériau étant transparent au rayonnement laser au moins entre une surface externe 24 du corps et une paroi 25.1, 25.2 du chambrage 22.1, 22.2.
Le corps 21 comportant une portion formant au moins une lentille 26 de focalisation dudit rayonnement laser dans le chambrage 22.1, 22.2 à proximité de la paroi 25.1,
25.2.
Les lentilles 26 sont ici au nombre de deux par extrémité du corps 1 et ont chacune la forme d'un bourrelet annulaire convexe assurant une focalisation du rayonnement laser et un élargissement de celui-ci selon une direction circonférentielle de la paroi 25.1, 25.2.
Les extrémités de conduite 23.1, 23.2 sont emmanchées à force dans les chambrages 22.1, 22.2 de sorte que la surface externe de chaque extrémité de conduite 23.1, 23.2 est appliquée avec un effort de pression contre la paroi 25.1, 25.2 des chambrages 22.1,
22.2.
Des rayonnements laser comprenant un faisceau pour chaque lentille 26 (chambrage 22.1) ou un faisceau pour deux lentilles 26 (chambrage 22.2) sont ensuite émis selon une direction radiale du raccord 20 sur les lentilles 26. Le point de focalisation se trouve sur la surface externe de chaque extrémité de conduite 23.1,
23.2. Une mise en rotation du raccord ou un déplacement circulaire de la source de rayonnement autour du raccord 20 est ensuite réalisé pour obtenir une soudure continue de chaque extrémité de conduite 23.1, 23.2 à la paroi
25.1, 25.2 des chambrages 22.1, 22.2. Comme les points de focalisation des faisceaux ont une forme allongée selon une direction circonférentielle des chambrages 22.1,
22.2, la rotation ou le déplacement circulaire sont limités . Il serait également possible de disposer plusieurs sources de rayonnement réparties autour du raccord 20. A titre d'exemple, on peut utiliser six sources disposées à 60° les unes des autres.
On notera qu'en multipliant les lentilles et en prévoyant une pluralité de sources de rayonnement laser, il est possible de réaliser des soudures en plusieurs endroits des éléments sans déplacement ni des sources ni des éléments .
On notera également que la surface 24 forme une surface d'entrée du rayonnement laser dans le raccord et la paroi 25.1, 25.2 forme une surface de sortie du rayonnement laser hors du raccord.
Bien entendu, l'invention n'est pas limitée aux modes de mise en œuvre décrit mais englobe toute variante entrant dans le champ de l'invention telle que définie par les revendications . Le corps du premier élément peut être partiellement opaque au moins au niveau de la surface de contact et le corps du deuxième élément peut être partiellement transparent mais au moins entre la surface de contact et une surface d'entrée du rayonnement laser dans le corps.
La portion formant lentille peut comprendre une ou plusieurs lentilles. La portion formant lentille 6 est agencée pour produire un point de soudure ou une pluralité de points de soudure se chevauchant ou non. Chaque zone d'impact formant les points de soudure peut avoir une forme circulaire ou allongée ou autre.
La lentille peut également avoir un profil en portion de cercle ou de parabole.

Claims

REVENDICATIONS
1. Procédé de fabrication d'un dispositif comportant au moins un premier élément (1) et un deuxième élément (2) en contact l'un avec l'autre chacun par une surface de contact (3, 4), caractérisé en ce qu'il comprend les étapes de : réaliser un corps du premier élément en un matériau tel que le corps soit au moins partiellement opaque à un rayonnement laser au moins au niveau de la surface de contact,
- réaliser un corps du deuxième élément en un matériau tel que le corps soit transparent au rayonnement laser au moins entre la surface de contact et une surface d'entrée (7) du rayonnement laser dans le corps, en ménageant une portion du corps pour former au moins une lentille (6) de réfraction dudit rayonnement laser,
- appliquer la surface de contact du deuxième élément sur la surface de contact du premier élément et diriger au moins une source de rayonnement laser vers la surface d'entrée du deuxième élément de manière à fondre la surface de contact du premier élément et souder le deuxième élément sur le premier élément, la portion formant lentille débouchant sur une surface (7) du corps opposée à la surface de contact (3,4) et étant agencée pour mettre en forme le rayonnement laser dans au moins une zone d'impact du rayonnement laser sur ladite surface de contact et pour produire une pluralité de points de soudure .
2. Procédé selon la revendication 1, dans lequel la portion formant lentille (6) est agencée pour concentrer le rayonnement laser dans la zone d'impact.
3. Procédé selon la revendication 1, dans lequel la portion formant lentille (6) est agencée de telle manière que les points de soudure se chevauchent .
4. Procédé selon l'une quelconque des revendications précédentes, dans lequel chaque point de soudure a une forme allongée.
5. Procédé selon la revendication 1, dans lequel la portion formant lentille (6) a une forme allongée et un déplacement relatif des éléments et du rayonnement laser est réalisé pour soumettre la totalité de la portion formant lentille au rayonnement laser.
6. Procédé selon la revendication 5 , dans lequel le déplacement relatif est obtenu en déplaçant la sortie de la source de rayonnement laser le long de la portion formant lentille (6) .
7. Procédé selon la revendication 5 , dans lequel le déplacement relatif est obtenu en déplaçant les éléments par rapport à la sortie de la source de rayonnement laser.
8. Procédé selon la revendication 1, dans lequel le rayonnement laser présente une dimension transversale supérieure à une dimension transversale maximale de la portion formant lentille (6) .
9. Procédé selon l'une des revendications précédentes, dans lequel la portion formant lentille s'étend selon une ligne fermée.
10. Procédé selon la revendication 1, dans lequel le rayonnement laser est émis selon une direction incliné par rapport aux surfaces de contact (3, 4) .
11. Dispositif obtenu conformément à l'une quelconque des revendications précédentes, comportant au moins un premier élément (1) et un deuxième élément (2) en contact l'un avec l'autre chacun par une surface de contact (3, 4) et soudés l'un à l'autre au niveau de la surface de contact, caractérisé en ce que :
- le premier élément a un corps en un matériau au moins partiellement opaque à un rayonnement laser au moins au niveau de la surface de contact, - le deuxième élément a un corps en un matériau transparent au rayonnement laser au moins entre la surface de contact et une surface d'entrée (7) du rayonnement laser dans le corps, le corps comportant une portion formant au moins une lentille (6) de réfraction dudit rayonnement laser au voisinage de la surface de contact du premier élément, la portion formant lentille débouchant sur une surface (7) du corps opposée à la surface de contact (3,4) .
12. Elément (2) d'un dispositif conforme à la revendication 11, ayant un corps en un matériau transparent à un rayonnement laser auquel serait soumis le corps, le matériau étant transparent au rayonnement laser au moins entre une surface d'entrée (7) du rayonnement laser dans le corps et une surface de sortie (4) du rayonnement laser, le corps comportant une portion formant au moins une lentille (6) de réfraction dudit rayonnement laser pour mettre en forme une zone d'impact du rayonnement laser avec une surface de contact d'un autre élément qui serait appliquée contre la surface de sortie du rayonnement laser au-delà et à proximité de la surface de sortie.
13. Elément (2) d'un dispositif conforme à la revendication 12, dans lequel la lentille a un profil elliptique.
14. Raccord comportant un corps délimitant un chambrage de réception d'une extrémité de conduite, le corps étant en un matériau transparent à un rayonnement laser auquel serait soumis le corps, le matériau étant transparent au rayonnement laser au moins entre une surface externe du corps et une paroi du chambrage, le corps comportant une portion formant au moins une lentille de focalisation dudit rayonnement laser pour mettre en forme une zone d'impact du rayonnement laser avec une surface externe d'une extrémité de conduite qui serait reçue dans le chambrage.
EP09800111A 2008-07-24 2009-07-09 D'un element pour former une lentille; dispositif, element de ce dispositif et raccord pour la mise en oeuvre de ce procede Withdrawn EP2323804A1 (fr)

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FR0804212A FR2934187B1 (fr) 2008-07-24 2008-07-24 Procede de fabrication d'un dispositif par soudage laser, dispositif, element de ce dispositif et raccord pour la mise en oeuvre de ce procede
PCT/FR2009/000849 WO2010010241A1 (fr) 2008-07-24 2009-07-09 D'un element pour former une lentille; dispositif, element de ce dispositif et raccord pour la mise en oeuvre de ce procede

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Also Published As

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CN102105257A (zh) 2011-06-22
FR2934187A1 (fr) 2010-01-29
FR2934187B1 (fr) 2011-04-08
WO2010010241A9 (fr) 2010-03-04
WO2010010241A1 (fr) 2010-01-28
US20110143069A1 (en) 2011-06-16

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