FR2597379A1 - Method for treating a thin-sheet material using a laser beam, and device for the implementation of this method - Google Patents

Method for treating a thin-sheet material using a laser beam, and device for the implementation of this method Download PDF

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Publication number
FR2597379A1
FR2597379A1 FR8605684A FR8605684A FR2597379A1 FR 2597379 A1 FR2597379 A1 FR 2597379A1 FR 8605684 A FR8605684 A FR 8605684A FR 8605684 A FR8605684 A FR 8605684A FR 2597379 A1 FR2597379 A1 FR 2597379A1
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FR
France
Prior art keywords
sheet
laser beam
impact
point
reflections
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
FR8605684A
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French (fr)
Other versions
FR2597379B1 (en
Inventor
Maurice Riviere
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.)
Carnaud Emballage SA
Original Assignee
Carnaud Emballage 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 Carnaud Emballage SA filed Critical Carnaud Emballage SA
Priority to FR8605684A priority Critical patent/FR2597379B1/en
Publication of FR2597379A1 publication Critical patent/FR2597379A1/en
Application granted granted Critical
Publication of FR2597379B1 publication Critical patent/FR2597379B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0665—Shaping the laser beam, e.g. by masks or multi-focusing by beam condensation on the workpiece, e.g. for focusing
    • 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
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • 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
    • 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
    • B29C65/1635—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
    • B29C65/1641—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 making use of a reflector on the opposite side, e.g. a polished mandrel or a mirror
    • 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
    • B29C66/50—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
    • B29C66/70—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
    • B29C66/73341—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 glossy or reflective
    • 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
    • B29C66/81268—Reflective 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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
    • B23K2101/12—Vessels
    • B23K2101/125—Cans
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • B29C66/5452—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other joining hollow bottoms to bottom of bottles
    • 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
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/717—Cans, tins

Abstract

Method for welding or for cutting a sheet material, using a laser beam attacking the said sheet at an angle. According to the invention, a reflecting element forming, for example, a roller 15 for gripping and/or driving the ferrule (sleeve) 13 to be formed, is placed facing the latter so as to constitute a multiple-reflection system creating such reflections upstream of the impact point P with respect to the direction of movement of the ferrule (sleeve) being formed. Application to the manufacture of preserve tins.

Description

"Procédé de traitement par faisceau laser d'un matériau en
feuille mince et dispositif pour la mise en oeuvre de ce
procédé"
L'invention se rapporte à un procédé de traitement par faisceau laser d'un matériau en feuille relativement mince et réfléchissant, tout particulièrement une tôle mais également certaines feuilles de matière plastique."Method of treatment by laser beam of a material in
thin sheet and device for implementing this
process"
The invention relates to a method of treatment by laser beam of a relatively thin and reflecting sheet material, in particular a sheet metal but also certain sheets of plastic material.

L'invention vise particulièrement le soudage ou le découpage de telles feuilles au moyen dudit faisceau laser et concerne plus spécifiquement un perfectionnement permettant d'augmenter le rendement d'un tel procédé en agissant sur la partie réfléchie dudit faisceau, pour la rendre utilisable. The invention particularly relates to the welding or cutting of such sheets by means of said laser beam and relates more specifically to an improvement making it possible to increase the efficiency of such a process by acting on the reflected part of said beam, to make it usable.

Dans l'un des domaines privilégiés de l'invention, c'est-à-dire le soudage bord à bord ou en léger recouvrement de tôles ou pièces métalliques minces (ou encore d'une même tôle enroulée sur elle-même de façon à définir une portion tubulaire, pour la fabrication d'une boite de conserve par exemple) le faisceau laser est souvent orienté perpendiculairement à la surface à souder, afin d'obtenir une pénétration maximum du faisceau dans l'épaisseur de la matière. Néanmoins, une partie non négligeable de l'énergie transportée par le faisceau est perdue, soit absorbée par le plasma qui se crée au voisinage du "point d'impact", soit réfléchie par la cible.On a jusqu'à présent considéré que le soudage ou le découpage d'un matériau réfléchissant présentait une difficulté supplémentaire du fait que la partie réfléchie du faisceau pouvait être renvoyée vers la lentille de focalisation, jusqu'à la détériorer, dans des conditions extrêmes d'utilisation. On a cherché à prévenir ce type de détérioration en attaquant la zone à souder ou à découper avec un certain angle, mais dans ce cas, une partie encore plus importante de l'énergie de rayonnement est réfléchie et donc perdue. In one of the preferred fields of the invention, that is to say edge-to-edge welding or in light covering of thin metal sheets or pieces (or even of the same sheet wound on itself so as to define a tubular portion, for the manufacture of a tin can, for example) the laser beam is often oriented perpendicular to the surface to be welded, in order to obtain maximum penetration of the beam into the thickness of the material. However, a non-negligible part of the energy transported by the beam is lost, either absorbed by the plasma which is created in the vicinity of the "point of impact", or reflected by the target. welding or cutting a reflective material presented an additional difficulty since the reflected part of the beam could be returned to the focusing lens, until it deteriorated, under extreme conditions of use. We tried to prevent this type of deterioration by attacking the area to be welded or cut with a certain angle, but in this case, an even greater part of the radiation energy is reflected and therefore lost.

L'invention se place dans le contexte défini en dernier lieu et se propose d'améliorer le rendement global d'un tel principe de soudage ou de découpage en récupérant le rayonnement réfléchi au point d'impact et en l'exploitant à des fins de préchauffage de la feuille de matériau elle-même, favorisant ainsi le soudage ou le découpage proprement dit, opéré par l'énergie directement appliquée au point d'impact. The invention takes place in the context defined last and proposes to improve the overall efficiency of such a welding or cutting principle by recovering the radiation reflected at the point of impact and by using it for the purpose of preheating of the sheet of material itself, thus promoting welding or cutting proper, operated by the energy directly applied to the point of impact.

Dans cet esprit, l'invention concerne un procédé de traitement par faisceau laser d'un matériau en feuille relativement mince et au moins partiellement réfléchissant, du type consistant à diriger un tel faisceau vers au moins une telle feuille en mouvement, selon un angle non nul avec la normale à ladite feuille au point d'impact dudit faisceau sur celle-ci, caractérisé en ce qu'il consiste à provoquer une pluralité de réflexions dudit faisceau le long de ladite feuille, ces réflexions se propageant en amont du point d'impact par rapport au sens de déplacement de ladite feuille. In this spirit, the invention relates to a method of treatment by laser beam of a relatively thin and at least partially reflecting sheet material, of the type consisting in directing such a beam towards at least one such moving sheet, at an angle not zero with normal to said sheet at the point of impact of said beam thereon, characterized in that it consists in causing a plurality of reflections of said beam along said sheet, these reflections propagating upstream of the point of impact with respect to the direction of movement of said sheet.

Dans la pratique, les réflexions du faisceau le long de la feuille seront obtenues en disposant une structure réfléchissante au voisinage de celle-ci de façon à provoquer des réflexions multiples du faisceau laser entre ladite feuille et ladite structure réfléchissante, ces réflexions multiples se propageant ainsi en amont du point d'impact. In practice, the reflections of the beam along the sheet will be obtained by arranging a reflecting structure in the vicinity thereof so as to cause multiple reflections of the laser beam between said sheet and said reflecting structure, these multiple reflections thus propagating upstream of the point of impact.

Pour cela il suffit par exemple que la feuille en mouvement et la structure réfléchissante définissent approximativement une sorte de dièdre creux vers lequel est pointé ledit faisceau laser.For this it suffices for example that the moving sheet and the reflecting structure define approximately a kind of hollow dihedral towards which said laser beam is pointed.

L'invention concerne également un dispositif de traitement par faisceau laser de matériau en feuille relativement mince et au moins partiellement réfléchissante, telle par exemple une tôle, du type comportant des moyens générateurs d'un faisceau laser, des moyens de transmission et de focalisation dudit faisceau vers un point d'impact sur ladite feuille et des moyens de mise en mouvement de celle-ci, caractérisé en ce que lesdits moyens de transmission et de focalisation étant agencés pour que ledit faisceau fasse un angle non nul avec la normale à ladite feuille au point d'impact, un élément réfléchissant, par exemple métallique, placé au voisinage de ladite feuille est conformé pour définir avec celle-ci un système à réflexions multiples en amont dudit point d'impact par rapport au sens de déplacement de ladite feuille. The invention also relates to a device for processing a relatively thin and at least partially reflective sheet material by laser beam, such as a sheet for example, of the type comprising means for generating a laser beam, means for transmitting and focusing said beam. beam towards a point of impact on said sheet and means for setting it in motion, characterized in that said transmission and focusing means being arranged so that said beam forms a non-zero angle with the normal to said sheet at the point of impact, a reflective element, for example metallic, placed in the vicinity of said sheet is shaped to define therewith a multiple reflection system upstream of said point of impact relative to the direction of movement of said sheet.

Dans ce cas, l'élément réfléchissant, métalliqùe, définissant approximativement avec la feuille à traiter une sorte de dièdre du type mentionné ci-dessus, peut tout simplement être constitué par un rouleau de serrage et/ou d'entraînement de ladite feuille. On peut également envisager de faire circuler un cordon metallique réfléchissant entre un tel rouleau et la feuille de matériau a traiter pour que les caractéristiques de réflexion du faisceau laser restent aussi bonnes et aussi constantes que possible pendant toute la période d'utilisation du dispositif.Il est en outre à noter que le fait d'utiliser un tel rouleau de serrage et/ou d'entraînement pour ses qualités réfléchissantes ou pour maintenir un cordon métallique réfléchissant au voisinage de la zone à traiter, favorise, dans le cas de la soudure, le maintien bord â bord ou en léger recouvrement des parties å assembler, du fait que le rouleau se trouve placé en chevauchement de part et d'autre de la ligne de contact des bords alors que, dans le passé, les rouleaux de serrage et/ou d'entraînement devaient être éloignés des bords pour permettre le passage du faisceau laser dirigé perpendiculairement à la zone à traiter. In this case, the reflective, metallic element, defining approximately with the sheet to be treated a kind of dihedral of the type mentioned above, can simply consist of a clamping roller and / or driving said sheet. It is also conceivable to circulate a reflective metal cord between such a roll and the sheet of material to be treated so that the reflection characteristics of the laser beam remain as good and as constant as possible throughout the period of use of the device. It should also be noted that the fact of using such a clamping and / or driving roller for its reflective qualities or for maintaining a reflective metal bead in the vicinity of the area to be treated, promotes, in the case of welding, keeping edge to edge or slightly overlapping the parts to be assembled, because the roller is placed overlapping on either side of the edge contact line whereas, in the past, the clamping rollers and / or drive should be moved away from the edges to allow the passage of the laser beam directed perpendicular to the area to be treated.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre de plusieurs dispositifs pour la mise en oeuvre de son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexes dans lesquels:
- la figure 1 est une vue partielle d'une installation de soudage par faisceau laser conforme au principe de l'invention;
- la figure 2 est une vue de détails à plus grande échelle du dispositif de la figure 1 illustrant un soudage bord à bord ainsi qu'une variante possible;
- la figure 3 est une vue de détail à plus grande échelle du dispositif de la figure 1, illustrant un soudage avec rectuvrement;
la figure 4 est une vue partielle en coupe illustrant le soudage d'une coupelle et d'un corps de boite; et
- la figure 5 est une coupe V-V de la figure 4 pendant la même opération de soudage.The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of several devices for implementing its principle, given solely by way of example and made with reference to the annexed drawings in which:
- Figure 1 is a partial view of a laser beam welding installation according to the principle of the invention;
- Figure 2 is a detail view on a larger scale of the device of Figure 1 illustrating edge-to-edge welding as well as a possible variant;
- Figure 3 is a detail view on a larger scale of the device of Figure 1, illustrating a soldering welding;
Figure 4 is a partial sectional view illustrating the welding of a cup and a box body; and
- Figure 5 is a section VV of Figure 4 during the same welding operation.

En se reportant plus particulièrement aux figures 1 à 3, on a représenté un dispositif de soudage de tôle ili par faisceau laser 12, plus particulièrement agencé pour souder les bords rejoints de flans rectangulaires métalliques conformés en viroles cylindriques 13, par des moyens de mise en circulation et de maintien, classiques et non représentés, à l'exception de deux rouleaux de serrage et/ou d'entraînement 15, 16 coopérant, entre autre, pour maintenir les deux bords rejoints pendant l'opération de soudage. Les deux rouleaux sont sollicités l'un vers l'autre pour enserrer lesdits bords rejoints et l'un d'eux est entraîné en rotation. Referring more particularly to Figures 1 to 3, there is shown a sheet metal welding device ili by laser beam 12, more particularly arranged to weld the joined edges of rectangular metal blanks shaped into cylindrical ferrules 13, by means of setting circulation and holding, conventional and not shown, with the exception of two clamping and / or driving rollers 15, 16 cooperating, among other things, to keep the two edges joined during the welding operation. The two rollers are urged towards each other to grip said joined edges and one of them is rotated.

Selon une caractéristique importante de l'invention, les rouleaux 15, 16 sont disposés en chevauchement sur la ligne de jonction des bords à souder, ceux-ci se présentant soit dans une configuration de contact champ contre champ (figure 2), soit avec un léger recouvrement des bords (figure 3). According to an important characteristic of the invention, the rollers 15, 16 are arranged in overlap on the junction line of the edges to be welded, these occurring either in a configuration of field-to-field contact (FIG. 2), or with a slight overlap of the edges (Figure 3).

Par ailleurs, le dispositif comporte un générateur de faisceau laser de forte puissance (de l'ordre de quelques kW) schématisé par le bloc 17 à la figure 1 et des moyens optiques de transmission et de focalisation 18 du faisceau laser, connus et comportant notamment une lentille de focalisation 18a et un miroir 19, visibles sur la figure 1 et disposés pour diriger le faisceau focalisé vers un "point d'impact" P, fixe et situé sur le trajet de la pièce métallique à traiter, c'est-à-dire plus particulièrement ici sur la ligne de soudage définie par l'avancement de la virole 13 serrée entre les rouleaux 15 et 16. Comme le montrent les dessins, les moyens de transmission et de focalisation du faisceau laser (notamment la position et l'orientation du miroir 19) sont réglés pour que ledit faisceau fasse un angle A non nul avec la normale à la surface de la virole au point d'impact P.En outre, un élément réfléchissant, métallique, est placé au voisinage de la virole et est conformé pour définir avec celle-ci un système à réflexions multiples en amont du point d'impact P par rapport au sens de déplacement de la virole. Furthermore, the device comprises a high-power laser beam generator (of the order of a few kW) shown diagrammatically by block 17 in FIG. 1 and optical means for transmitting and focusing 18 of the laser beam, known and comprising in particular a focusing lens 18a and a mirror 19, visible in FIG. 1 and arranged to direct the focused beam towards a "point of impact" P, fixed and located on the path of the metal part to be treated, that is to say -to say more particularly here on the welding line defined by the advancement of the ferrule 13 clamped between the rollers 15 and 16. As shown in the drawings, the means for transmitting and focusing the laser beam (in particular the position and the orientation of the mirror 19) are adjusted so that said beam makes a non-zero angle A with the normal to the surface of the shell at the point of impact P. In addition, a reflecting, metallic element is placed in the vicinity of the shell and is consistent for challenge with it a multiple-reflection system upstream of the point of impact P with respect to the direction of movement of the shell.

Dans l'exemple de la figure 3, l'élément réfléchissant est constitué par le rouleau 15 lui-même, dont la surface est suffisamment polie pour jouer le rôle de réflecteur avec la surface en regard du flan métallique conformé en virole 13. Ce poli peut être entretenu grâce à des moyens de nettoyage appropriés, en contact avec la surface du rouleau, par exemple des moyens de brossage classiques, non représentés. In the example of FIG. 3, the reflecting element is constituted by the roller 15 itself, the surface of which is sufficiently polished to act as a reflector with the surface facing the metal blank shaped as a ferrule 13. This polished can be maintained by means of appropriate cleaning means, in contact with the surface of the roller, for example conventional brushing means, not shown.

Dans la variante de la figure 2, au contraire, l'élément réfléchissant est constitué par un cordon métallique 25, par exemple un feuillard de cuivre ou d'aluminium en bande, serré entre la surface de la virole 13 et le rouleau 15 et entraîné par la rotation de celui-ci. Le cordon 25 est ainsi transféré en continu d'une bobine débitrice vers une bobine réceptrice ou de récupération (ces bobines n étant pas représentées) de façon à toujours présenter en regard de la virole un état de surface présentant un poli de caractéristique prédéterminée. In the variant of FIG. 2, on the contrary, the reflecting element is constituted by a metal cord 25, for example a strip of copper or aluminum in strip, clamped between the surface of the ferrule 13 and the roller 15 and driven by the rotation of it. The bead 25 is thus continuously transferred from a supply reel to a take-up or recovery reel (these reels not being shown) so as to always have a surface finish with a polish of predetermined characteristic opposite the ferrule.

On conçoit qu'avec le trajet en ligne brisée de la fraction réfléchie du faisceau laser au point d'impact P, se propageant en amont de ce point d'impact par rapport au sens de déplacement de la virole, l'énergie transportée par ladite fraction réfléchie puisse provoquer un préchauffage de la tôle, facilitant la soudure elle-même (ou le découpage, ou tout autre traitement thermique possible grâce au laser). Le procédé s'applique de la même façon sur une surface non métallique, par exemple en matière plastique, suffisamment réfléchissante. It is understood that with the broken line path of the reflected fraction of the laser beam at the point of impact P, propagating upstream of this point of impact relative to the direction of movement of the shell, the energy transported by said reflected fraction could cause preheating of the sheet, facilitating the welding itself (or cutting, or any other possible heat treatment thanks to the laser). The method is applied in the same way on a non-metallic surface, for example made of plastic, which is sufficiently reflective.

De nombreuses autres variantes sont possibles. Many other variations are possible.

Notamment, la focalisation peut être effectuée directement par le miroir 19 si celui-ci a une surface en forme de parabololde. L'agencement peut être tel que le faisceau laser ait son point d'impact à l'intérieur de la virole, ce qui, dans le cas d'une tôle décorée extérieurement, présente l'avantage de ne pas détériorer le décor au voisinage de la ligne d'assemblage.In particular, the focusing can be carried out directly by the mirror 19 if the latter has a surface in the form of a paraboloid. The arrangement can be such that the laser beam has its point of impact inside the shell, which, in the case of an externally decorated sheet, has the advantage of not deteriorating the decoration in the vicinity of the assembly line.

Enfin, les figures 4 et 5 illustrent l'application du principe de l'invention au soudage d'une virole 26 formant corps de boîte, déjà formé, éventuellement de la façon indiquée ci-dessus, avec un couvercle ou fond de boite 27 en forme de disque à bordure rabattue 28. Le pourtour circulaire de la virole 26 est soudé à la bordure 28 par l'action d'un faisceau laser 30 dirigé comme précédemment en biais, dans l'espace défini entre la surface externe de la virole et l'un des rouleaux d'entrainement 31, 32, métalliques et présentant un poli suffisant. Ces rouleaux assurent par ailleurs la mise en rotation des pièces en contact, nécessaire à la réalisation de l'opération de soudage.  Finally, FIGS. 4 and 5 illustrate the application of the principle of the invention to the welding of a ferrule 26 forming a box body, already formed, possibly in the manner indicated above, with a cover or bottom of the box 27 in disc shape with folded edge 28. The circular periphery of the shell 26 is welded to the edge 28 by the action of a laser beam 30 directed as previously at an angle, in the space defined between the external surface of the shell and one of the drive rollers 31, 32, metallic and having sufficient polish. These rollers also ensure the rotation of the parts in contact, necessary for carrying out the welding operation.

Claims (6)

REVENDTCATlONSRESELL 1- Procédé de traitement par faisceau laser d'un matériau en feuille relativement mince et au moins partiellement réfléchissant, du type consistant a diriger un tel faisceau (12) vers au moins une telle feuille en. 1- Method of treatment by laser beam of a relatively thin and at least partially reflecting sheet material, of the type consisting in directing such a beam (12) towards at least one such sheet. mouvement, selon un angle non nul avec la normale à ladite feuille au point d'impact (P) dudit faisceau sur celle-ci, caractérisé en ce qu'il consiste à provoquer une pluralité de réflexions dudit faisceau le long de ladite feuille (13), ces réflexions se propageant en amont du point d'impact {P) par rapport au sens de déplacement de ladite feuille.movement, at a non-zero angle with the normal to said sheet at the point of impact (P) of said beam thereon, characterized in that it consists in causing a plurality of reflections of said beam along said sheet (13 ), these reflections propagating upstream of the point of impact (P) relative to the direction of movement of said sheet. 2- Procédé de traitement par faisceau laser selon la revendication 1, caractérisé en ce qu'il consiste à placer une structure réfléchissante (15,25.' au voisinage de ladite feuille de façon à provoquer des réflexions multiples entre cette dernière et ladite structure réfléchissante. 2- laser beam treatment method according to claim 1, characterized in that it consists in placing a reflecting structure (15,25. 'In the vicinity of said sheet so as to cause multiple reflections between the latter and said reflecting structure . 3- Dispositif de traitement par faisceau laser de matériau en feuille relativement mince et au moins partiellement réfléchissante, telle par exemple une tôle, du type comportant des moyens générateurs d'un faisceau laser, des moyens de transmission et de focalisation (18) dudit faisceau (12) vers un point d'impact (P) sur ladite feuille et des moyens de mise en mouvement de celle-ci, caractérisé en ce que lesdits moyens de transmission et de focalisation étant agencés pour que ledit faisceau fasse un angle (A) non nul avec la normale à ladite feuille au point d'impact (P), un élément réfléchissant (15, 25), par exemple métallique, placé au voisinage de ladite feuille est conformé pour définir avec celle-ci un système à réflexions multiples en amont dudit point d'impact (P) par rapport au sens de déplacement de ladite feuille. 3- Device for processing by laser beam material in relatively thin and at least partially reflective sheet, such as a sheet, of the type comprising means generating a laser beam, means for transmitting and focusing (18) said beam (12) towards an impact point (P) on said sheet and means for setting it in motion, characterized in that said transmission and focusing means being arranged so that said beam makes an angle (A) not zero with the normal to said sheet at the point of impact (P), a reflective element (15, 25), for example metallic, placed in the vicinity of said sheet is shaped to define therewith a system with multiple reflections in upstream of said point of impact (P) relative to the direction of movement of said sheet. 4- Dispositif de traitement par faisceau laser selon la revendication 3, caractérisé en ce que ledit élément réfléchissant est constitué par un rouleau de serrage et/ou d'entrainement (15) de ladite feuille. 4- A laser beam treatment device according to claim 3, characterized in that said reflecting element is constituted by a clamping roller and / or drive (15) of said sheet. 5- Dispositif de traitement par faisceau laser selon la revendication 3, caractérisé en ce que ledit élément réfléchissant est constitué par un cordon réfléchissant (25) par exempie métallique, en défilement, intercalé entre ladite feuille et un rouleau de serrage etlou d'entrainemet (15) de celle-ci. 5- laser beam treatment device according to claim 3, characterized in that said reflective element is constituted by a reflective bead (25) made of metal, running, interposed between said sheet and a clamping roller and / or drive ( 15) thereof. 6- Dispositif de traitement par faisceau laser selon l'une des revendication 4 ou 5, pour le soudage de deux bords de feuille, caractérisé en ce que ledit rouleau de serrage et/ou d'entrainement (15) est placé en chevauchement de part et d'autre de la ligne de contact desdits bords.  6- laser beam treatment device according to one of claims 4 or 5, for the welding of two sheet edges, characterized in that said clamping and / or drive roller (15) is placed overlapping on one side and on the other side of the contact line of said edges.
FR8605684A 1986-04-21 1986-04-21 LASER BEAM TREATMENT PROCESS FOR THIN SHEET MATERIAL AND DEVICE FOR CARRYING OUT SAID METHOD Expired - Lifetime FR2597379B1 (en)

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Publication number Priority date Publication date Assignee Title
WO1989010231A1 (en) * 1988-04-22 1989-11-02 Fraunhofer-Gesellschaft Zur Förderung Der Angewand Process for joining workpieces made of fusible material using a laser beam
EP0460611A1 (en) * 1990-06-05 1991-12-11 Nippon Steel Corporation Method of producing corrugated metal sheeting and method of producing honeycomb structure therefrom for carrying catalytic agents used for purifying exhaust gases
WO2004058485A1 (en) * 2002-12-27 2004-07-15 Laserquipment Ag Method and device for welding thermoplastic material shaped parts, particularly for contour-welding three-dimensional shaped parts
WO2007115803A3 (en) * 2006-04-06 2007-11-22 Fresenius Medical Care De Gmbh Transmission laser welding method for joining molded plastic articles
EP1905571A1 (en) * 2006-09-26 2008-04-02 ProLas GmbH Process and device for welding films
EP2441569A3 (en) * 2010-10-13 2015-12-23 Huber Packaging Group GmbH Method and device for producing cans with a plastic wall

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US4237363A (en) * 1977-02-04 1980-12-02 Lemelson Jerome H Beam welding apparatus and method
EP0174915A1 (en) * 1984-08-20 1986-03-19 FIAT AUTO S.p.A. Apparatus for effecting treatment of metal workpieces by means of a power laser

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Publication number Priority date Publication date Assignee Title
US4237363A (en) * 1977-02-04 1980-12-02 Lemelson Jerome H Beam welding apparatus and method
EP0174915A1 (en) * 1984-08-20 1986-03-19 FIAT AUTO S.p.A. Apparatus for effecting treatment of metal workpieces by means of a power laser

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010231A1 (en) * 1988-04-22 1989-11-02 Fraunhofer-Gesellschaft Zur Förderung Der Angewand Process for joining workpieces made of fusible material using a laser beam
EP0460611A1 (en) * 1990-06-05 1991-12-11 Nippon Steel Corporation Method of producing corrugated metal sheeting and method of producing honeycomb structure therefrom for carrying catalytic agents used for purifying exhaust gases
WO2004058485A1 (en) * 2002-12-27 2004-07-15 Laserquipment Ag Method and device for welding thermoplastic material shaped parts, particularly for contour-welding three-dimensional shaped parts
CN100348404C (en) * 2002-12-27 2007-11-14 Lpkf激光电子股份公司 Method and device for welding thermoplastic material shaped parts, particularly for contour-welding three-dimensional shaped parts
US8075725B2 (en) 2002-12-27 2011-12-13 Laserquipment Ag Method and device for welding thermoplastic material shaped parts, particularly for contour-welding three-dimensional shaped parts
WO2007115803A3 (en) * 2006-04-06 2007-11-22 Fresenius Medical Care De Gmbh Transmission laser welding method for joining molded plastic articles
US8778120B2 (en) 2006-04-06 2014-07-15 Fresenius Medical Care Deutschland Gmbh Transmission laser welding method for connecting shaped plastic bodies
EP1905571A1 (en) * 2006-09-26 2008-04-02 ProLas GmbH Process and device for welding films
EP2441569A3 (en) * 2010-10-13 2015-12-23 Huber Packaging Group GmbH Method and device for producing cans with a plastic wall

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