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WO2018097716A1 - Affaiblissement d'effet de bord au moyen d'un conducteur de dérivation pendant un processus de soudage par induction - Google Patents

Affaiblissement d'effet de bord au moyen d'un conducteur de dérivation pendant un processus de soudage par induction Download PDF

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Publication number
WO2018097716A1
WO2018097716A1 PCT/NL2017/050765 NL2017050765W WO2018097716A1 WO 2018097716 A1 WO2018097716 A1 WO 2018097716A1 NL 2017050765 W NL2017050765 W NL 2017050765W WO 2018097716 A1 WO2018097716 A1 WO 2018097716A1
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WIPO (PCT)
Prior art keywords
panel
poly
edge
conducting element
conducting
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Ceased
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PCT/NL2017/050765
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English (en)
Inventor
Joaquim Vila BRAMON
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Technische Universiteit Delft
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Technische Universiteit Delft
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Publication of WO2018097716A1 publication Critical patent/WO2018097716A1/fr
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/366—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a coating or being printed, e.g. being applied as a paint or forming a printed circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3684—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being non-metallic
    • 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
    • B29C66/347—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • 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
    • B29C66/70—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
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined
    • B29C66/7313—Density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3608—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3616—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising discontinuous fibre-reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3636—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising independent continuous fibre-reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/364—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a woven or non-woven fabric or being a mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8292—Testing the joint by the use of ultrasonic, sonic or infrasonic waves
    • 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
    • B29C66/70—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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • B29C66/712—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 composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined
    • B29C66/7314—Electrical and dielectric properties
    • B29C66/73141—Electrical conductivity
    • 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
    • B29C66/735—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 extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • 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
    • 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
    • B29C66/7394—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 thermoset
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3067—Ships
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3076—Aircrafts

Definitions

  • the invention is in the field of an induction welding process particularly suited for thermoplastic composites.
  • the invention is in the field of an induction welding process particularly suited for thermoplastic composites.
  • thermoforming i.e. forming under a heat source.
  • the composites may therefore be applied in various applications, such as aerospace and automotive industry.
  • the composites have not been applied significantly yet as the technol- ogy for joining is considered insufficient, especially for pre-fabricated parts.
  • technol- ogy for joining is considered insufficient, especially for pre-fabricated parts.
  • thermoset composites complex pre-treatment and heating mechanisms are required, whereas for thermoplastic composites it is difficult to ensure that only the interface is heated and no (foreign) material is left at the bond line. Besides an esthetical effect the bonds have limited strength as a consequence and thus limited application.
  • Thermosets composites have limited application as they are joined using mechanical fastening or adhesive bonding.
  • mechanical fastening the holes involved cut reinforcement fibres and result in stress concentrations around the holes.
  • Adhesive bonding may require large prefabricated parts to be heated, in order to cure the adhesive.
  • thermoplastic composites can be joined by other tech- niques such as fusion or welding; this process does in principle not damage the composites and provides further advantages.
  • a welding process of a thermoplastic composite is considered to relate to a process that heats the interface/surface to a temperature above a glass transition temperature of the composite for amorphous polymers or above a melting point for semi-crystalline polymers.
  • the process typically involves application of pressure such as to diffuse thermoplastic polymers over the interface/surface and thereby forming a welded joint, typically after cooling.
  • the process is typically fast without interface/surface preparation.
  • Joining may be required when components of a product, such as an aircraft, are too large to be produced as a single part, when different materials are used, when different production conditions are needed, when components are made in physical locations spaced apart, etc.
  • induced eddy currents may flow in a metal implant which needs to be provided such as at a weld interface or in fibers of the composite material.
  • Induction welding processes have been further developed recently, in particular for airplanes.
  • volumetric heating may be achieved as closed electro-magnetic pathways in the composite material in the mate- rial itself are then provided by the fibers.
  • extra measures need to be taken, also in order to concentrate heat generated by induction, especially when thicker elements (> 4 mm) are concerned.
  • subsequent panels/interfaces are ro- tated with respect to one and another, e.g. when forming a laminate .
  • US 5,500,511 A recites tailored susceptors for induction welding of thermoplastic, to obtain more uniform heating across the susceptor when welding composite parts using induction heating, having edge regions of lower absolute impedance or a lower longitudinal impedance than the transverse impedance to counterbalance the higher current density and current that occurs near the edges.
  • the lower impedance at the edges is achieved by altering the aspect ratio ⁇ length/width ⁇ of openings in the susceptor, by folding the susceptor over onto itself, or both. Uniform heating is important to obtaining a uniform, consistent weld on which aerospace designers can rely.
  • US 5,508496 A recites salvaged susceptor for thermoplastic welding by induction heating which are tailored to provide precise control of the heat applied to the weld and especially to control overheating at the edges of susceptor.
  • the pre- ferred susceptor has a central portion having a uniform pattern of substantially similar openings and selvage edge strips devoid of openings to provide a low impedance current path for eddy currents at the edges.
  • These patents are related to a susceptor which is provided as a metal mesh embedded inside the composite.
  • US 6,939,477 A recites temperature-controlled induction heating of polymeric materials.
  • Induction heating technologies are utilized to weld, forge, bond or set polymer materials.
  • the invention provides controlled-temperature induction heating of polymeric materials by mixing ferromagnetic particles in the polymer to be heated. Temperature control is obtained by selecting ferromagnetic particles with a specific Curie temperature. The ferromagnetic particles will heat up in an induction field, through hysteresis losses, until they reach their Curie temperature. At that point, heat generation through hysteresis loss ceases.
  • This invention is applicable to bonding thermoplastic materials, wherein only the area to be heated has ferromagnetic particles in it; bonding of ther- moset composites, which have been processed with a layer of thermoplastic material on one side; curing of thermoset adhe- sives or composite resins; or consolidating thermoplastic composites .
  • US 5,248,864 A recites a method for heating a composite comprising a nonconductive material that is a thermoplastic or a thermoset reinforced with conductive materials such as carbon fibers, by incorporating coupling particles in the structure.
  • the structure is oriented in the plane of a magnetic field induced at frequencies from 3 kHz to 7 MHz, whereby the coupling particles respond as susceptors to the induced magnetic field and are preferentially heated (carbon fibers are not heated) .
  • US 2013/149,501 Al recites a method for connecting a fibre composite component to a structural component of an aircraft and spacecraft.
  • a metal foil is provided as a transverse rein- forcement element between the fibre composite component and the structural component. It is formed with at least one anchoring portion which protrudes from the surface facing the fibre composite component and is inserted between the fibre composite component and the structural component.
  • a corre- sponding arrangement is produced in accordance with this method.
  • WO 90/008027 Al recites a method of joining plastics materials by forming a contact between two parts to be joined, placing an electrical induction coil adjacent the contact and electrically inductively heating the parts in the vicinity of the contact.
  • a layer comprising multidirectional discontinuous carbon fibres in the presence of thermoplastics material is provided in the vicinity of the contact, at least some of the carbon fibers being oriented to provide resistive conducting paths for the flow of eddy currents. Electrically inducing eddy currents in the layer heats the thermoplastics material and causes it to fuse at the contact and form a join between the two parts.
  • the present invention therefore relates to an improved method for induction welding of panels, a construction element obtainable by said method, and a product obtainable by said method, which overcome one or more of the above disadvantages, without jeopardizing functionality and advantages.
  • the present invention relates in a first aspect to a method for induction welding of at least two panels.
  • Said panels typically form part of a larger construction to be formed.
  • the panels are typically flat and relatively thin.
  • the panels are typically limited in size, e.g. from a few cm by a few cm ⁇ e.g. 10 by 10 cm 2 ) to a size that can still be handled, either by a machine or by a human being (e.g. 10 by 10 m 2 ) .
  • the pre- sent panels are formed of electrically semi-conducting materi ⁇ als, which materials are well suited for induction welding.
  • the present panels have a relatively low specific mass of ⁇ 2 kg/1, preferably of ⁇ 1.5 kg/1, more preferably of ⁇ 1.4 kg/1, such as ⁇ 1.35 kg/1, especially when compared to prior art construction materials, such as aluminium or (light weight) metal in general. In view of displacement of a final product such a low specific mass and hence low final mass is highly desired.
  • First at least one panel is provided.
  • the panel may be provided on an intermediate, i.e. non-final, product; on said intermediate product an earlier applied panel may already be present, said earlier applied panel having an edge (as well) .
  • the at least one panel has at least one edge, i.e. a virtual line where the panel physically ends.
  • an electrically conducting element is provided, typically leaving a distance open, measured (perpendicular) from the edge, of less than 5 cm, preferably less than 1 cm, more preferably less than 5 mm, even more preferably less than 1 mm, such as ⁇ 0.1 mm or about 0 cm; in fact the conducting element may be partly over the edge, such as 0.1-1 mm.
  • Said conducting element which may also be referred to as "by-pass conductor”, is found to provide improved characteristics at the edge zone and mitigates the above mentioned problems.
  • the conducting element preferably has a good electrical contact with the panel. Then an electro-magnetic field at an edge zone of said panel comprising said electrically conducting element is generated, and thereby the edge zone is induction welded.
  • the invention provides a novel methodology to overcome un- desired edge effects when two light materials (such as based on composites of carbon fibers and plastics) are
  • Suitable materials for panels and final products typically have a Young's modulus (E) of > 1 GPa, such as > 3 GPa, a ten ⁇ sile strength of > 50 MPa (ISO 527), such as > 90 MPa, an elongation @ break of > 40% (ISO 37:2011), such as > 50%, a glass transition temperature of > 100 °C (as determined by differential scanning calorimetry) , such as > 130 °C, a melt ⁇ ing point of > 250 °C, such as > 300 °C, a thermal conductiv ⁇ ity of 0.1-1 W/m.K, and a low water absorption (24 hours (ASTM D 570) ⁇ 0.1%), and combinations thereof.
  • E Young's modulus
  • the present invention relates to a construction element obtainable by the present method, wherein a porosity percentage of the element at the edge zone is ⁇ 7%, preferably ⁇ 3%, more preferably ⁇ 2 , such as ⁇ 1% and typically ⁇ 0.5%, as determined by ultrasound or computed radiography.
  • a porosity can be determined according to the procedure as described in e.g. J. Composites, Vol. 2013, Article ID 140127, "Porosity Distribution in Composite Structures with Infrared Thermography" by C. Toscano et al.
  • the present invention relates to a prod ⁇ uct obtainable by the present method, wherein the product is selected from a part of transport vehicle or the vehicle, such as an airplane, a car, a truck, a boat, a ship, wherein the part is preferably one of a wing, a tail, a door, a body, a door, a hood, and a frame.
  • the present invention provides a solution to one or more of the above-mentioned problems.
  • the present invention relates in a first aspect to a method according to claim 1.
  • At least two panels are provided of different materials or of the same material, with the proviso that the to be welded at least one panel is typically of a thermoplastic material.
  • a panel may also relate to an intermediate product comprising e.g. an earlier applied panel having an edge, on which intermediate product a further panel is applied, typically edge to edge.
  • the intermediate product and/or earlier applied panel may be of the same material as the at least one panel applied subsequently or of a different material.
  • the material (s) is/are a composite material, such as a thermoplastic composite or a thermoset composite, such as a carbon or glass reinforced material, and combinations thereof.
  • the ma- terial or materials, and especially the to be welded panel has/have an electrical conductivity of ⁇ 10 4 S/m at 20 °C, i.e. are slightly conducting.
  • some electrical conductivity is preferred.
  • the material (s) is/are selected from aromatic or aliphatic polymers, such as polyether ketones, such as polyaryletherketones , such as Polyether-ether-ketone (PEEK) , Polyether-ketone-ketone (PEKK) , poly sulfones, such as poly-ether sulfones (PES), and poly phenyl sulfones (PPSU), poly sulphides, such as poly phenylene sulphide (PPS), poly alkylenes, such as poly alkylene imines, such as poly alkylene imines, such as poly ethylene imine (PEI), poly imidazoles, such as polybenzimid- azole (PBI), and combinations thereof, preferably PEI, PES, PEEK, PEKK, PPS and PEI.
  • aromatic or aliphatic polymers such as polyether ketones, such as polyaryletherketones , such as Polyether-ether-ketone (PEEK) , Polyether-
  • a thickness of the at least one panel is from 0.2-20 mm, preferably 0.5-5 mm, more preferably 0.6-3 mm, even more preferably 0.7-2 mm, such as 1-1.5, hence relatively thin panels may be welded.
  • the conducting element is selected from a conducting tape, such as a copper tape, a conducting grease, such as copper or aluminum grease, graphite, graphene, a coating, such as a metallic coating, such as a gold coating.
  • a conducting tape such as a copper tape
  • a conducting grease such as copper or aluminum grease
  • graphite such as copper or aluminum grease
  • graphene such as graphene
  • a coating such as a metallic coating, such as a gold coating.
  • the conducting element has a thickness (t) of 10-1000 ⁇ , preferably 20-500 pm, more preferably 30-200 ⁇ , such as 50-100 ⁇ , e.g. 70-80 pm, and/or a relative width of 50-100% of the thickness of the panel, preferably 70-99% of said thickness, more preferably 90-98% of said thickness. It has been found experimentally that e.g. in view of a temperature profile obtained during induction welding, the width of the conducting element is not too large and not too small.
  • the conducting element has an electrical conductivity of > 10 3 S/m at 20 °C, preferably > 10 4 S/m, more preferably > 10 6 S/m, i.e. a relatively high conductivity. It has been found that the higher the conductivity is, the better results are obtained and less conducting material needs to be used.
  • the conducting element is provided over a width of 1-1000 cm, preferably 2-500 cm, such as 5-250 cm.
  • the edge is polished before applying the conducting element, such as by sand polishing, preferably using a fine polishing mate- rial.
  • the edge may be cleaned, such as chemically cleaned, in order to remove impurities. Especially polishing is found to reduce adverse porosity effects.
  • a welding temperature is from 423-673 K (150-400 °C) , preferably 448-623 K (175-325 °C) , more preferably 473-573 K (200-300 °C) , and/or at a magnetic field density of 10-50 Gauss, such as 20-30 Gauss.
  • a fre- quency of 0.01-10 MHz is used, preferably 0.1-5 MHz, such as 0.15-3 MHz, and/or a power of 10-1000 W/cm 2 , preferably 20- 500 W/cm 2 , more preferably 50-250 W/cm 2 , and/or during a period of 1-120 sec, preferably 2-60 sec, and/or at a relative welding speed of 5-200 mm/sec, preferably 10-100 mm/sec, such as 15-50 mm/sec.
  • Said welding speed may be obtained by moving the panel relative to the welding element, by moving the welding element, or both
  • the panels form a part of transport vehicle, such as an air- plane, a car, a truck, a boat, a ship, wherein the part is preferably one of a wing, a tail, a door, a body, a door, a hood, and a frame.
  • Fig. 1 Photographs of various panels, the top panel being a carbon fiber composite without conducting element, there beneath an aluminum grease applied to the edge, there beneath a gold coating applied, and the bottom panel with a reversed copper tape.
  • Fig.2a-c show schematically the eddy current distribution for a coil being much smaller than the panel (2a) , for a coil being of similar dimensions as the panel (2b) , and the effect of the present conducting element (2c) .
  • edge ef- feet strength is given in view of relative dimensions of composite panel (1) and coil (2).
  • Fig. 3 shows an exemplary effect of the thickness h of the applied conducting element.
  • the temperature profile (T in °C on the vertical axis) is given as a function of position on the panel (horizontal axis, in mm) . It can be observed that the thickness of the conducting material is especially of influence on the temperature near the edge, e.g. the last 10-20 mm edge zone .
  • the optimal range is found to be between ⁇ and ⁇ in thickness (red curves).
  • the below relates to an example of the present induction welding.
  • thermo- couple transducer type K The temperature is recorded using a regular thermo- couple transducer type K, however the metallic tip can be effected by induced currents in the vicinity of the coil. Hence, it is place on the top surface of the panel because the magnetic field strength is considered to decrease through the thickness of the composite and at the centre where the mag- netic field is weaker due to the coil's shape, reducing the effect that the magnetic field could produce to the sensor.
  • the thermocouple is also electrically isolated from the composite by placing Kapton tape between them, preventing any parasite current flowing through.
  • a thermal infrared camera from Flir Systems type A615 is set 40 cm above the panel to capture the heat pattern on top surface. Both devices are recording each second of all the data which is stored in a PC. As such a good adhesion is obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de soudage par induction d'au moins un panneau (1) d'un matériau électriquement semi-conducteur présentant une masse spécifique de < 2 kg/I comprenant la fourniture dudit au moins un panneau (1), la fourniture d'un élément électriquement conducteur (3) au niveau d'au moins un bord du panneau et l'application d'un champ électromagnétique au niveau de la zone de bord soudant par induction la zone de bord. La présence de l'élément conducteur (3) évite la surchauffe du bord pendant le soudage.
PCT/NL2017/050765 2016-11-24 2017-11-22 Affaiblissement d'effet de bord au moyen d'un conducteur de dérivation pendant un processus de soudage par induction Ceased WO2018097716A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2017866 2016-11-24
NL2017866A NL2017866B1 (en) 2016-11-24 2016-11-24 Edge effect weakening by means of bypass-conductor during induction welding process

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WO2018097716A1 true WO2018097716A1 (fr) 2018-05-31

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230211571A1 (en) * 2022-01-03 2023-07-06 Rohr, Inc. Use of removable metal frames to control induction welding of thermoplastic composite edges
EP4491380A1 (fr) 2023-07-13 2025-01-15 Facc Ag Procédé de fabrication d'un composant composite fibre-plastique (fkv), procédé de soudage par induction et composant composite fk

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008027A1 (fr) 1989-01-10 1990-07-26 Courtaulds Plc Assemblage de materiaux composites
US5248864A (en) 1991-07-30 1993-09-28 E. I. Du Pont De Nemours And Company Method for induction heating of composite materials
US5500511A (en) 1991-10-18 1996-03-19 The Boeing Company Tailored susceptors for induction welding of thermoplastic
US5508496A (en) 1991-10-18 1996-04-16 The Boeing Company Selvaged susceptor for thermoplastic welding by induction heating
US6939477B2 (en) 1997-06-06 2005-09-06 Ashland, Inc. Temperature-controlled induction heating of polymeric materials
US20130149501A1 (en) 2009-12-08 2013-06-13 Airbus Operations Gmbh Method for connecting a fibre composite component to a structural component of an aircraft and spacecraft and a corresponding arrangement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008027A1 (fr) 1989-01-10 1990-07-26 Courtaulds Plc Assemblage de materiaux composites
US5248864A (en) 1991-07-30 1993-09-28 E. I. Du Pont De Nemours And Company Method for induction heating of composite materials
US5500511A (en) 1991-10-18 1996-03-19 The Boeing Company Tailored susceptors for induction welding of thermoplastic
US5508496A (en) 1991-10-18 1996-04-16 The Boeing Company Selvaged susceptor for thermoplastic welding by induction heating
US6939477B2 (en) 1997-06-06 2005-09-06 Ashland, Inc. Temperature-controlled induction heating of polymeric materials
US20130149501A1 (en) 2009-12-08 2013-06-13 Airbus Operations Gmbh Method for connecting a fibre composite component to a structural component of an aircraft and spacecraft and a corresponding arrangement

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
C. TOSCANO: "Porosity Distribution in Composite Structures with Infrared Thermography", J. COMPOSITES, vol. 2013
FORZAN ET AL.: "Compensation of induction heating load edge-effect by space control", COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING, vol. 30, no. 5, 2011, pages 1558 - 1569
NEMKOV ET AL.: "Simulation of induction heating of slabs using ELTA 6.0", INTERN. SCIENTIFIC COLLOQUIUM MODELLING FOR ELECTROMAGNETIC PROCESSING, 2014

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230211571A1 (en) * 2022-01-03 2023-07-06 Rohr, Inc. Use of removable metal frames to control induction welding of thermoplastic composite edges
US12370752B2 (en) * 2022-01-03 2025-07-29 Rohr, Inc. Use of removable metal frames to control induction welding of thermoplastic composite edges
EP4491380A1 (fr) 2023-07-13 2025-01-15 Facc Ag Procédé de fabrication d'un composant composite fibre-plastique (fkv), procédé de soudage par induction et composant composite fk
WO2025012451A1 (fr) 2023-07-13 2025-01-16 Facc Ag Procédé de soudage par induction pour assembler des composants en plastique renforcés par des fibres (frp), et pièce composite frp

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