JP4868494B2 - Method and apparatus for welding resin body - Google Patents

Method and apparatus for welding resin body Download PDF

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Publication number
JP4868494B2
JP4868494B2 JP2005316309A JP2005316309A JP4868494B2 JP 4868494 B2 JP4868494 B2 JP 4868494B2 JP 2005316309 A JP2005316309 A JP 2005316309A JP 2005316309 A JP2005316309 A JP 2005316309A JP 4868494 B2 JP4868494 B2 JP 4868494B2
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JP
Japan
Prior art keywords
resin body
laser beam
laser light
evaluation
unit
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.)
Expired - Fee Related
Application number
JP2005316309A
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Japanese (ja)
Other versions
JP2007118491A (en
Inventor
剛志 吉村
伸一 和井
隆 今川
美緒子 中西
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.)
Hitachi Metals Ltd
Toho Gas Co Ltd
Original Assignee
Hitachi Metals Ltd
Toho Gas Co Ltd
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Publication date
Application filed by Hitachi Metals Ltd, Toho Gas Co Ltd filed Critical Hitachi Metals Ltd
Priority to JP2005316309A priority Critical patent/JP4868494B2/en
Publication of JP2007118491A publication Critical patent/JP2007118491A/en
Application granted granted Critical
Publication of JP4868494B2 publication Critical patent/JP4868494B2/en
Expired - Fee Related legal-status Critical Current
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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
    • B29C66/01—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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B29C65/168—Laser beams making use of an absorber or impact modifier placed at 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
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B29C65/1683—Laser beams making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—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
    • B29C66/40—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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B29C66/652—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—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
    • B29C66/723—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 being multi-layered
    • B29C66/7232—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 being multi-layered comprising a non-plastics layer
    • B29C66/72321—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 being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient 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
    • 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
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9131—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/922—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9221—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/939—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges
    • 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
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
    • B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

本発明は、樹脂体の溶着方法および溶着装置に関し、特に、レーザ光吸収部を介して樹脂体同士を溶着する樹脂体の溶着方法および溶着装置に係るものである。   The present invention relates to a resin body welding method and a welding apparatus, and particularly relates to a resin body welding method and a welding apparatus for welding resin bodies to each other via a laser light absorbing portion.

近年、プラスチック部品など樹脂体同士をレーザ光で溶着する技術が注目されており、その溶着部の溶着状態を判断する技術が例えば特許文献１に開示されている。   In recent years, a technique of welding resin bodies such as plastic parts with a laser beam has attracted attention, and a technique for determining the welding state of the welded portion is disclosed in Patent Document 1, for example.

特許文献１の技術は、レーザ光を透過する透過性樹脂体とレーザ光を吸収する吸収性樹脂体とをレーザ光で溶着するにあたり、レーザ光を照射することにより前記樹脂体同士の当接面に形成された溶融部から透過性樹脂材を透過して放射される放射光により溶融部の温度を検出し、溶融部の温度に基づいて樹脂材同士の溶着状態を判断するものである。   In the technique of Patent Document 1, in welding a transparent resin body that transmits laser light and an absorbent resin body that absorbs laser light with laser light, the contact surfaces of the resin bodies are irradiated by irradiating the laser light. The temperature of the melted part is detected by the radiated light emitted through the permeable resin material from the melted part formed on the surface, and the welded state of the resin materials is judged based on the temperature of the melted part.

この特許文献１の技術は、樹脂体同士の間に隙間または異物が存在している異常部分がある場合には溶着不良が生じやすい該異常部分の溶融温度が正常部分の温度と異なることに着眼したものであり、この技術によれば、計測された溶融部の温度に基づいて溶着状態の良否をインラインで判断しながら溶着できるという利点がある。   The technique of Patent Document 1 focuses on the fact that when there is an abnormal part in which a gap or foreign matter exists between resin bodies, the melting temperature of the abnormal part, which is likely to cause poor welding, is different from the temperature of the normal part. Therefore, according to this technique, there is an advantage that welding can be performed while judging the quality of the welded state in-line based on the measured temperature of the melted part.

しかしながら、特許文献１の技術は係る利点を有するものの、透過性樹脂体の有する放射光の透過度または吸収性樹脂体の有する放射光の吸収性の不均一性により計測される溶融部の温度にバラツキが生じ、その結果、溶着状態の良否を誤判断する可能性がある。
特開２００４−１２２５６０号（段落番号０００６〜０００８） However, although the technique of Patent Document 1 has such an advantage, the temperature of the melted portion is measured by the non-uniformity of the radiant light transmittance of the transmissive resin body or the radiant light absorbency of the absorbent resin body. As a result, there is a possibility that the quality of the welded state is misjudged.
JP 2004-122560 A (paragraph numbers 0006 to 0008)

本発明は、上記従来技術の課題を鑑み発明者らが鋭意検討してなされたものであり、管の外周面上で樹脂体同士をレーザ光で溶着するにあたり、樹脂体同士の溶着部が十分な強度を有する樹脂体の溶着方法および溶着装置を提供することを目的としている。
The present invention has been made by intensive studies by the inventors in view of the above-described problems of the prior art, and when the resin bodies are welded with laser light on the outer peripheral surface of the tube, the welded portion between the resin bodies is sufficient. An object of the present invention is to provide a method and apparatus for welding a resin body having a sufficient strength.

本発明の一態様は、レーザ光透過性を有する第１樹脂体と、第２樹脂体とを、管の外周面上で重ね合わせ、レーザ光吸収性を有するレーザ光吸収部を介し、第１樹脂体と第２樹脂体とをレーザ光で溶着する樹脂体の溶着方法であって、レーザ光吸収部を介して重ね合わされた第１樹脂体と第２樹脂体とを、レーザ光が照射される領域を挟む、管の外周方向前後を所定の押圧力で押圧し、第１樹脂体の側からレーザ光をレーザ光吸収部に照射し該レーザ光吸収部に溶着部を形成するレーザ光照射工程と、前記レーザ光のエネルギー量を評価する第１評価工程と、前記溶着部の形状を評価する第２評価工程と、前記押圧力を評価する第３評価工程を少なくとも含み、第１工程乃至第３評価工程における評価に基づいて溶着部の溶着状態の良否を判別する樹脂体の溶着方法である。
According to one aspect of the present invention, a first resin body having laser light permeability and a second resin body are superposed on an outer peripheral surface of a tube, and the first resin body is interposed through a laser light absorber having laser light absorption . A resin body welding method in which a resin body and a second resin body are welded with laser light, wherein the first resin body and the second resin body overlapped with each other through a laser light absorbing portion are irradiated with laser light. that sandwich the region, the outer circumferential direction around the tube is pressed by a predetermined pressing force, the irradiated laser light irradiation to form a welded portion in the laser-absorbing part from a side of the first resin body with a laser beam to the laser light absorption unit A first evaluation step for evaluating the energy amount of the laser beam, a second evaluation step for evaluating the shape of the welded portion, and a third evaluation step for evaluating the pressing force. Based on the evaluation in the third evaluation process, the quality of the welded portion is judged. A welding method of the resin body.

かかる溶着方法によれば、第１樹脂体と第２樹脂体との間で押圧され両者と密着している状態のレーザ光吸収部に第１樹脂体の側からレーザ光を照射することにより、レーザ光吸収部が溶融するとともに該レーザ光吸収部に密着している第１樹脂体および第２樹脂体も溶融し、第１樹脂体および第２樹脂体を接合する溶着部が形成される。このとき、第１評価工程において、照射されているレーザ光のエネルギー量を評価することにより溶着部を形成するための適正な熱量が当接面に付与されているか否かが評価される。また、第２評価工程において、溶着部の形状を評価することにより溶着部が十分な強度を有しているか否かが評価される。すなわち、例えば溶着部の大きさに基づいて評価する場合には、溶着部が小さければ相対的に強度が低いと評価され、また、溶着部が大きすぎるときには過加熱により樹脂が劣化して材料強度が低下強度が低くなるので、溶着部が適正な大きさを有しているか否かにより融着部の強度が評価される。また、第３評価工程において、第１樹脂体と第２樹脂体との押圧力を評価することにより第１樹脂体と第２樹脂体との間に隙間がなく密着しているか否かが評価される。そして、第１乃至第３評価工程における評価を総合し、溶着部の溶着状態の良否を判別することにより、十分な強度を有する溶着部が形成されていることが担保される。   According to such a welding method, by irradiating the laser light absorbing portion pressed between the first resin body and the second resin body and in close contact with the laser light from the first resin body side, While the laser beam absorbing portion is melted, the first resin body and the second resin body that are in close contact with the laser light absorbing portion are also melted to form a welded portion that joins the first resin body and the second resin body. At this time, in the first evaluation step, it is evaluated whether or not an appropriate amount of heat for forming the welded portion is applied to the contact surface by evaluating the energy amount of the irradiated laser beam. In the second evaluation step, it is evaluated whether or not the welded portion has sufficient strength by evaluating the shape of the welded portion. That is, for example, when evaluating based on the size of the welded portion, it is evaluated that the strength is relatively low if the welded portion is small, and when the welded portion is too large, the resin deteriorates due to overheating and the material strength However, the strength of the welded portion is evaluated depending on whether or not the welded portion has an appropriate size. In the third evaluation step, it is evaluated whether or not the first resin body and the second resin body are in close contact with each other by evaluating the pressing force between the first resin body and the second resin body. Is done. And it is ensured that the welding part which has sufficient intensity | strength is formed by integrating the evaluation in a 1st thru | or 3rd evaluation process, and discriminating the quality of the welding state of a welding part.

なお、上記態様において、前記第１評価工程において、レーザ光の発振状態に基づいて算出したレーザ光のエネルギー量または前記溶着部の温度に基づいて算出したレーザ光のエネルギー量、に基づいて溶着状態の良否を判別することができる。さらに、上記態様において、前記レーザ光照射工程において前記溶着部を筋状に形成するとともに、前記第２評価工程において計測した該溶着部の幅に基づいて溶着状態の良否を判別すれば、筋状に形成された溶着部の幅に基づいて確実に溶着部の溶着状態の良否が判別されるので好ましい。   In the above aspect, the welding state based on the energy amount of the laser light calculated based on the oscillation state of the laser light or the energy amount of the laser light calculated based on the temperature of the welded portion in the first evaluation step. Can be determined. Further, in the above aspect, when the welded portion is formed in a streak shape in the laser light irradiation step and the quality of the welded state is determined based on the width of the welded portion measured in the second evaluation step, a streak shape is obtained. The quality of the welded state of the welded part is surely determined based on the width of the welded part formed in this manner.

本発明の別の態様は、上記、樹脂体の溶着方法を実施するために特に好ましいものであり、レーザ光透過性を有する第１樹脂体と、第２樹脂体とを、管の外周面上で重ね合わせ、レーザ光吸収性を有するレーザ光吸収部を介し、第１樹脂体と第２樹脂体とをレーザ光で溶着する樹脂体の溶着装置であって、（１）前記レーザ光吸収部を介して重ね合わされた前記第１樹脂体と前記第２樹脂体とを、レーザ光が照射される領域を挟む、管の外周方向前後を所定の押圧力で押圧する押圧部と、（２）前記第１樹脂体の側からレーザ光を前記レーザ光吸収部に照射し該レーザ光吸収部に溶着部を形成するレーザ光照射部と、（３）前記レーザ光照射部から照射されるレーザ光のエネルギー量を評価する第１評価手段と、前記レーザ光照射部で形成された溶着部の形状を評価する第２評価手段と、前記押圧部の押圧力を評価する第３評価手段と、第１乃至第３評価手段の評価に基づいて溶着部の溶着状態の良否を判別する判別手段とを有する演算部とを備えた樹脂体の溶着装置である。
Another aspect of the present invention is particularly preferable for carrying out the above-described method of welding a resin body. The first resin body having laser beam transparency and the second resin body are disposed on the outer peripheral surface of the tube. And a resin body welding device that welds the first resin body and the second resin body with laser light via a laser light absorption section having laser light absorption, and (1) the laser light absorption section A pressing portion that presses the first resin body and the second resin body, which are overlapped with each other via a laser beam, with a predetermined pressing force across a region irradiated with laser light , and (2) A laser beam irradiation unit configured to irradiate the laser beam absorption unit with a laser beam from the first resin body side to form a welded portion on the laser beam absorption unit; and (3) a laser beam irradiated from the laser beam irradiation unit. Formed by the first evaluation means for evaluating the energy amount of the laser beam and the laser beam irradiation section. The second evaluation means for evaluating the shape of the welded portion, the third evaluation means for evaluating the pressing force of the pressing portion, and the quality of the welded state of the welded portion are determined based on the evaluation of the first to third evaluation means. And a resin body welding apparatus including a calculation unit having a determination unit.

なお、上記態様において、前記レーザ光の発振状態をモニタする監視手段を有し、前記第１評価手段は、前記監視手段によりモニタされたレーザ光の発振状態に基づいてレーザ光のエネルギー量を評価する構成としたり、前記レーザ光照射部で形成された溶着部の温度を計測する温度計測手段を有し、前記第１評価手段は、前記温度計測手段により計測された溶着部の温度に基づいてレーザ光のエネルギー量を評価する構成とすることができる。   In the above aspect, the laser device includes a monitoring unit that monitors the oscillation state of the laser beam, and the first evaluation unit evaluates the energy amount of the laser beam based on the oscillation state of the laser beam monitored by the monitoring unit. Or a temperature measuring means for measuring the temperature of the welded portion formed by the laser beam irradiation unit, wherein the first evaluation means is based on the temperature of the welded part measured by the temperature measuring means. It can be set as the structure which evaluates the energy amount of a laser beam.

さらに、上記態様において、前記レーザ光照射部から照射されるレーザ光を前記当接面に沿い移動させるレーザ光移動手段と前記レーザ光照射手段により形成された溶着部の形状を計測する形状計測手段とを有し、前記第２評価手段は、前記形状計測手段で計測された溶着部の形状に基づいて溶着部の形状を評価する構成とすれば好ましい。また、さらに、前記押圧部が発生する押圧力を計測する圧力計測手段を有し、前記第３評価手段は、前記圧力計測手段で計測された押圧力に基づいて押圧力を評価する構成とすればなお好ましい。   Furthermore, in the above aspect, a laser beam moving unit that moves the laser beam emitted from the laser beam irradiating unit along the contact surface, and a shape measuring unit that measures the shape of the welded portion formed by the laser beam irradiating unit. It is preferable that the second evaluation unit evaluates the shape of the welded part based on the shape of the welded part measured by the shape measuring unit. Further, the pressure measuring means for measuring the pressing force generated by the pressing portion is provided, and the third evaluation means is configured to evaluate the pressing force based on the pressing force measured by the pressure measuring means. More preferred.

本発明によれば、管の外周面上で樹脂体同士をレーザ光を使用して溶着するにあたり上記説明した構成としたので、樹脂体同士の溶着部が十分な強度を有する樹脂体の溶着方法および溶着装置を提供することができる。 According to the present invention, since the above-described configuration is used for welding the resin bodies on the outer peripheral surface of the tube using the laser beam, the method for welding the resin bodies having a sufficient strength at the welded portion between the resin bodies And a welding apparatus can be provided.

以下、本発明について、その実施態様１、２に基づき図面を参照しつつ説明する。なお、実施態様１では平板状の樹脂体を対象とし、実施態様２ではチューブ状の樹脂体を対象としているが、本発明は実施態様１，２にのみ限定されるものではない。   Hereinafter, the present invention will be described based on Embodiments 1 and 2 with reference to the drawings. In addition, although Embodiment 1 targets a flat resin body and Embodiment 2 targets a tube-shaped resin body, the present invention is not limited to Embodiments 1 and 2.

［実施態様１］
本発明の第１態様について図１〜５に基づき説明する。図１は第１態様の溶着装置の概略構成図、図２は図１の溶着装置が照射するレーザ光のエネルギー量の監視状態および樹脂体の溶着部の大きさと強度との関係を説明する図、図３は樹脂体の溶着部の大きさと強度との相関の関係を説明する図、図４は樹脂体同士の間に隙間が生じている場合に形成された溶着部を示す図、図５は図１の溶着装置の変形例の概略構成図である。 [Embodiment 1]
A first aspect of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of a welding apparatus according to a first aspect, and FIG. 2 is a diagram for explaining the relationship between the monitoring state of the energy amount of laser light irradiated by the welding apparatus of FIG. 3 is a view for explaining the correlation between the size and strength of the welded portion of the resin body, FIG. 4 is a view showing the welded portion formed when a gap is formed between the resin bodies, and FIG. These are the schematic block diagrams of the modification of the welding apparatus of FIG.

まず、第１態様の溶着装置１の構成について説明する。溶着装置１は、レーザ光透過性を有する平板状の第１樹脂体５１とレーザ光吸収性を有する平板状の第２樹脂体５２とをレーザ光Ｌを用いて接合するものであって、第１樹脂体５１を上側にして第２樹脂体５２と重ね合わされた第１樹脂体５１を上方から所定の押圧力で押圧する押圧部１４と、第１樹脂材５１と第２樹脂材との当接面５３に第１樹脂材５１の側からレーザ光Ｌを照射し溶着部５４を形成するレーザ光照射部１２と、前記レーザ光照射部１２から照射されるレーザ光Ｌのエネルギー量を評価する第１評価手段１１１と、前記レーザ光照射部１２で形成された溶着部５４の形状を評価する第２評価手段１１２と、前記押圧部１４の押圧力を評価する第３評価手段１１３と、第１乃至第３評価手段の評価に基づいて溶着部の溶着状態の良否を判別する判別手段１１４とを有する演算部１１とを備えている。ここで、第１態様においては、レーザ光吸収部は、符号５３で示すレーザ光吸収性を有する第１樹脂体５１と第２樹脂体５２との当接面であり、見かけ上、第１樹脂体５１と第２樹脂体５２は、該レーザ光吸収部５３を介して重ね合わされた状態となっている。（場合により、符号５３が指すものを「レーザ光吸収部」または「当接面」という。）以下、第１樹脂体５１、第２樹脂体５２、押圧部１４、レーザ光照射部１２及び演算部１１の各々の構成について説明する。   First, the structure of the welding apparatus 1 of a 1st aspect is demonstrated. The welding device 1 joins a flat plate-like first resin body 51 having laser beam transparency and a flat plate-like second resin body 52 having laser beam absorption property using a laser beam L, The pressing portion 14 that presses the first resin body 51 superimposed on the second resin body 52 with the predetermined pressing force from above with the first resin body 51 facing upward, and the first resin material 51 and the second resin material The laser beam irradiation unit 12 that irradiates the contact surface 53 with the laser beam L from the first resin material 51 side to form the welded portion 54, and the energy amount of the laser beam L irradiated from the laser beam irradiation unit 12 are evaluated. A first evaluation unit 111; a second evaluation unit 112 that evaluates the shape of the weld portion 54 formed by the laser beam irradiation unit 12; a third evaluation unit 113 that evaluates the pressing force of the pressing unit 14; The welding state of the welded portion based on the evaluation of the first to third evaluation means And a calculation unit 11 and a discriminating means 114 for discriminating the quality. Here, in the first aspect, the laser light absorbing portion is a contact surface between the first resin body 51 and the second resin body 52 having the laser light absorptivity indicated by reference numeral 53, and apparently the first resin. The body 51 and the second resin body 52 are superposed via the laser light absorbing portion 53. (Depending on the case, what the code | symbol 53 points out is called a "laser light absorption part" or a contact surface.) Hereinafter, the 1st resin body 51, the 2nd resin body 52, the press part 14, the laser beam irradiation part 12, and a calculation. Each configuration of the unit 11 will be described.

[第１樹脂体]
第１樹脂体５１は、上記したようにレーザ光透過性を有する樹脂、例えばナイロン６やナイロン６６等のポリアミド、ポリエチレン、ポリプロピレン、スチレン−アクリロニトリル共重合体、ポリエステル、ポリアセタール、ポリカーボネート、アクリル、ポリスチレン、アクリロニトリル−ブタジエン−スチレン共重合体（ＡＢＳ）などを平板状に成形してなるものであり、例えば波長が８０８ｎｍの半導体レーザに対して６０〜９０％程度のレーザ光透過率を有している。なお、第１樹脂体５１としては、必要に応じ、上記樹脂にガラス繊維やカーボンファイバ等を添加して強化したもの、または上記樹脂にレーザ光吸収性のない染料等で着色したものを用いてもよい。また、第１態様においては、レーザ光吸収部５３を第２樹脂体５２に配置しているが、第１樹脂体５１の下面（すなわち第２樹脂体５２との当接面）に例えば膜状または層状にレーザ光吸収部を配設してもよい。 [First resin body]
As described above, the first resin body 51 is a resin having a laser beam transmissivity, for example, polyamide such as nylon 6 or nylon 66, polyethylene, polypropylene, styrene-acrylonitrile copolymer, polyester, polyacetal, polycarbonate, acrylic, polystyrene, An acrylonitrile-butadiene-styrene copolymer (ABS) or the like is formed into a flat plate shape, and has a laser light transmittance of, for example, about 60 to 90% with respect to a semiconductor laser having a wavelength of 808 nm. In addition, as the 1st resin body 51, what added the glass fiber, the carbon fiber, etc. to the said resin and strengthened as needed, or what colored the said resin with the dye | dye which does not absorb a laser beam, etc. is used. Also good. In the first mode, the laser light absorbing portion 53 is disposed on the second resin body 52. However, for example, a film-like film is formed on the lower surface of the first resin body 51 (that is, the contact surface with the second resin body 52). Or you may arrange | position a laser beam absorption part in a layer form.

[第２樹脂体]
第２樹脂体５２は、上記したレーザ光吸収部５３を設けるためレーザ光吸収性を有する樹脂、次述する顔料または色素が添加されたナイロン６やナイロン６６等のポリアミド、ポリエチレン、ポリプロピレン、スチレン−アクリロニトリル共重合体、ポリエステル、ポリアセタール、ポリカーボネート、アクリル、ポリスチレン、アクリロニトリル−ブタジエン−スチレン共重合体（ＡＢＳ）などを平板状に成形してなるものであり、例えば波長が８０８ｎｍの半導体レーザに対して７０〜９０％程度のレーザ光吸収率を有している。 [Second resin body]
The second resin body 52 is made of a resin having a laser beam absorbability for providing the above-described laser beam absorber 53, a polyamide such as nylon 6 or nylon 66 to which a pigment or dye described below is added, polyethylene, polypropylene, styrene- An acrylonitrile copolymer, polyester, polyacetal, polycarbonate, acrylic, polystyrene, acrylonitrile-butadiene-styrene copolymer (ABS) or the like is formed into a flat plate shape. For example, it is 70 for a semiconductor laser having a wavelength of 808 nm. It has a laser light absorption rate of about 90%.

この第２樹脂体５２に添加する顔料としては、具体的には、セラミックブラック、酸化鉄（無機顔料）、カーボンブラック、ボーンブラック（有機顔料）等の黒色顔料、クロムエロー、セラミックエロー、ジンククロメートエロー（無機顔料）、ニッケルアゾグリーンエロー（有機顔料）等の黄色顔料、ハイドロクロムオキサイドグリーン、クロムグリーン（無機顔料）、クロミウムオキサイドダルグリーン、フタロシアニングリーン（有機顔料）等の緑色顔料を使用することができる。また、色素としては、例えばシアニン系色素の他、フタロシアニン系、チオールニッケル錯体系、インドフェノール金属錯体系、ナフトキノン系、アゾ系、トリアゾールメタン系、分子間型ＣＴ色素等の色素を使用することができる。なお、第２樹脂体５２としては、必要に応じ、上記樹脂にガラス繊維やカーボンファイバ等を添加して強化したものを用いてもよい。   Specific examples of the pigment added to the second resin body 52 include black pigments such as ceramic black, iron oxide (inorganic pigment), carbon black, bone black (organic pigment), chrome yellow, ceramic yellow, and zinc chromate yellow. (Inorganic pigments), yellow pigments such as nickel azo green yellow (organic pigments), green pigments such as hydrochrome oxide green, chrome green (inorganic pigments), chromium oxide dull green, and phthalocyanine green (organic pigments) it can. Further, as the dye, for example, a dye such as a phthalocyanine, a thiol nickel complex, an indophenol metal complex, a naphthoquinone, an azo, a triazole methane, or an intermolecular CT dye may be used in addition to a cyanine dye. it can. In addition, as the 2nd resin body 52, you may use what strengthened by adding glass fiber, a carbon fiber, etc. to the said resin as needed.

第２樹脂体５２は、必ずしも全体がレーザ光吸収性を有する必要はなく、少なくとも第１樹脂体５１との当接面５３（すなわち第２樹脂体５２の上面）がレーザ光吸収性を有していればよい。したがって、第２樹脂体５２の上面に例えば膜状または層状にレーザ光吸収部５３を設けてもよい。また、第１樹脂体５１および第２樹脂体５２とは別体の、レーザ光吸収性のあるフィルム、シート又はテープなどのレーザ光吸収材をレーザ光吸収部５３とし、該レーザ光吸収材を第１樹脂体５１及び第２樹脂体５２の間に挟みこむように設けてもよい。さらにまた、レーザ光吸収部５３は、レーザ光吸収性のある塗料を第２樹脂層５２の上面に塗布し形成することができる。さらにまた、レーザ光吸収部５３は、第１樹脂体５１と第２樹脂体５２との当接面の全体に配置されている必要はなく、レーザ光で溶着すべき場所のみに限定し、例えば連続した帯状にまたは離散して島状に配置してもよい。   The entire second resin body 52 is not necessarily required to have laser beam absorptivity, and at least the contact surface 53 with the first resin body 51 (that is, the upper surface of the second resin body 52) has laser beam absorptivity. It only has to be. Therefore, the laser light absorbing portion 53 may be provided on the upper surface of the second resin body 52 in a film shape or a layer shape, for example. Further, a laser light absorbing material such as a film, a sheet or a tape that absorbs laser light, which is separate from the first resin body 51 and the second resin body 52, serves as a laser light absorbing portion 53, and the laser light absorbing material is It may be provided so as to be sandwiched between the first resin body 51 and the second resin body 52. Furthermore, the laser light absorbing portion 53 can be formed by applying a coating material having a laser light absorption property on the upper surface of the second resin layer 52. Furthermore, the laser light absorbing portion 53 does not need to be disposed on the entire contact surface between the first resin body 51 and the second resin body 52, and is limited to a place where the laser light is to be welded. They may be arranged in a continuous strip or discrete islands.

［押圧部］
押圧部１４は、第１樹脂体５１と第２樹脂体５２とが重ね合わされた状態で載置される平板状のテーブル１４３と、テーブル１４３に載置された第１樹脂体５１の上面に当接可能に配設された平板状の押圧部材１４２と、押圧部材１４２の両端部に接続されたロッドを有するとともに該ロッド鉛直方向に押引するエアシリンダである押圧手段１４１と、で構成されている。なお押圧部材１４２は、レーザ光Ｌを十分透過する透明体により又は溶着部５４に対応した位置に切欠を設ける等して構成することができる。この押圧部１４によれば、押圧部材１４２が上方にある状態で、第１樹脂体５１と第２樹脂体５２をテーブル１４３の所定の位置に載置した後に、押圧手段１４１を作動させて押圧部材１４２を下降させ、押圧部材１４２によって第１樹脂体５１の上面を所定の押圧力で押圧し、第１樹脂体５１と第２樹脂体５２とを密着させる。なお、押圧部材１４２は平板状に限らず種々の形状とすることができ、さらに、押圧手段１４１としては油圧シリンダ、電気的・機械的直動部材、クランプ冶具等を使用することができる。 [Pressing part]
The pressing portion 14 contacts the flat table 143 placed in a state where the first resin body 51 and the second resin body 52 are overlapped, and the upper surface of the first resin body 51 placed on the table 143. A pressing member 142 having a flat plate shape disposed so as to be able to contact, and a pressing means 141 that has a rod connected to both ends of the pressing member 142 and is an air cylinder that pushes and pulls in the vertical direction of the rod. Yes. The pressing member 142 can be configured by a transparent body that sufficiently transmits the laser light L or by providing a notch at a position corresponding to the welded portion 54. According to the pressing portion 14, the first resin body 51 and the second resin body 52 are placed at predetermined positions on the table 143 with the pressing member 142 positioned upward, and then the pressing means 141 is operated to press The member 142 is lowered, and the upper surface of the first resin body 51 is pressed with a predetermined pressing force by the pressing member 142 to bring the first resin body 51 and the second resin body 52 into close contact with each other. Note that the pressing member 142 is not limited to a flat plate shape, and may have various shapes. Further, as the pressing means 141, a hydraulic cylinder, an electric / mechanical linear member, a clamp jig, or the like can be used.

ここで、テーブル１４３には、押圧部１４による押圧力を計測する例えば歪ゲージや半導体で構成された圧力センサからなる圧力計測手段１５が内蔵されている。第１態様の圧力計測手段１５は、テーブル１４３に載置された第１樹脂体５１及び第２樹脂体５２に対応する位置に配置され、押圧部１４による押圧力を計測可能に構成されている。なお、押圧部１４により第１樹脂体５１及び第２樹脂体５２に与えられる押圧力は、押圧手段１４１に与えられるエネルギー、例えばエアシリンダの場合には空気圧、電気式直動部材の場合には電動機の電流値などで間接的に計測するようにしてもよい。   Here, the table 143 has a built-in pressure measuring means 15 configured by, for example, a strain gauge or a pressure sensor made of a semiconductor for measuring the pressing force by the pressing portion 14. The pressure measuring means 15 of the first aspect is arranged at a position corresponding to the first resin body 51 and the second resin body 52 placed on the table 143, and is configured to be able to measure the pressing force by the pressing portion 14. . The pressing force applied to the first resin body 51 and the second resin body 52 by the pressing portion 14 is the energy applied to the pressing means 141, for example, air pressure in the case of an air cylinder, and in the case of an electric linear motion member. You may make it measure indirectly with the electric current value etc. of an electric motor.

［レーザ光照射部］
レーザ光照射部１２は、下方に向かいレーザ光Ｌを照射可能に取付部材（不図示）に取付けされたレーザ光照射手段１２１と、光ファイバを介してレーザ光照射手段１２１に接続されたレーザ光発振手段１２２とを備えており、レーザ光発振手段１２２には、レーザ光発振手段１２２に生じる電圧により発振されるレーザ光Ｌのエネルギー量をモニタする監視手段１２２１が組込まれている。なお、レーザ光照射手段１２１は、光ファイバを介さずレーザ光発振手段１２２と直接接続されていてもよい。 [Laser irradiation unit]
The laser beam irradiation unit 12 is a laser beam irradiation unit 121 attached to a mounting member (not shown) so as to be able to irradiate the laser beam L downward, and a laser beam connected to the laser beam irradiation unit 121 via an optical fiber. The laser beam oscillating unit 122 includes a monitoring unit 1221 for monitoring the energy amount of the laser beam L oscillated by the voltage generated in the laser beam oscillating unit 122. The laser light irradiation means 121 may be directly connected to the laser light oscillation means 122 without using an optical fiber.

ここで、レーザ照射手段１２１には複数の光学レンズが組込まれており、該光学レンズは、光ファイバを通じて伝送されたレーザ光Ｌを集光し適宜な位置に焦点を結ばせる。使用するレーザ光Ｌは特に限定されないが、樹脂に照射した場合にレーザ吸収率の高い波長が１０３０ｎｍ前後のＹＡＧレーザ、さらに好ましくは波長が９４０ｎｍまたは８０８ｎｍ程度の半導体レーザを使用することが第１樹脂体５１と第２樹脂体５２を確実に接合するためには望ましい。前記取付部材は、第１樹脂体５１の上面に対し水平方向および鉛直方向に自在に移動可能な移動手段（不図示）に設けられている。したがって、レーザ光照射手段１２１は、例えば図中矢印で示すように、レーザ光Ｌを下方に照射しながら一方向に直動したり、または曲線状に移動することができる。   Here, a plurality of optical lenses are incorporated in the laser irradiation means 121, and the optical lenses condense the laser light L transmitted through the optical fiber and focus it on an appropriate position. The laser beam L to be used is not particularly limited. However, when the resin is irradiated, a YAG laser having a high laser absorption rate of about 1030 nm, more preferably a semiconductor laser having a wavelength of about 940 nm or 808 nm is used. This is desirable for reliably joining the body 51 and the second resin body 52. The attachment member is provided on a moving means (not shown) that can freely move in the horizontal direction and the vertical direction with respect to the upper surface of the first resin body 51. Accordingly, the laser beam irradiation means 121 can move linearly in one direction or move in a curved line while irradiating the laser beam L downward, for example, as indicated by an arrow in the figure.

［形状計測手段］
第１態様の溶着装置１は、レーザ光Ｌでレーザ光吸収部５３近傍に形成された溶着部５４の形状を計測する形状計測手段１３を備えている。形状計測手段１３は、前記レーザ光照射手段１２１が取付けられている取付部材に取付けられており、レーザ光照射手段１２１と一定の位置関係を保ちつつ前記移動手段で駆動されレーザ光照射手段１２１と同期して移動する。本態様においては、形状計測手段１３として、所定の分解能および撮像範囲を有するＣＣＤカメラを使用している。なお、ＣＣＤカメラには、溶着部５４を照明するためのリング照明や適正な画像を得るための偏光フィルタ等が適宜取付けれらていてもよい。 [Shape measuring means]
The welding apparatus 1 according to the first aspect includes a shape measuring unit 13 that measures the shape of the welded portion 54 formed in the vicinity of the laser light absorbing portion 53 with the laser light L. The shape measuring means 13 is attached to an attachment member to which the laser light irradiation means 121 is attached, and is driven by the moving means while maintaining a certain positional relationship with the laser light irradiation means 121. Move synchronously. In this embodiment, a CCD camera having a predetermined resolution and imaging range is used as the shape measuring means 13. The CCD camera may be appropriately attached with a ring illumination for illuminating the welded portion 54, a polarizing filter for obtaining an appropriate image, and the like.

［演算部］
上記したように演算部１１は、第１〜第３評価手段１１１、１１２、１１３および判別手段１１４を主体として構成されており、第１評価手段１１１はレーザ光発振手段１２２に組込まれた監視手段１２２１と、第２評価手段１１２は形状計測手段１３と、第３評価手段１１３は圧力計測手段１５と、電気的に接続されている。また、第１〜第３評価手段１１１、１１２、１１３は、それぞれ判別手段１１４に電気的に接続されている。 [Calculator]
As described above, the calculation unit 11 is mainly configured by the first to third evaluation units 111, 112, 113 and the determination unit 114. The first evaluation unit 111 is a monitoring unit incorporated in the laser light oscillation unit 122. 1221, the second evaluation unit 112 is electrically connected to the shape measurement unit 13, and the third evaluation unit 113 is electrically connected to the pressure measurement unit 15. The first to third evaluation means 111, 112, and 113 are electrically connected to the determination means 114, respectively.

演算部１１は、具体的にはマイクロコンピュータで構成されるものであり、上記第１〜第３評価手段１１１、１１２、１１３および判別手段１１４は、マイクロコンピュータに内蔵されたメモリー上に格納されＣＰＵで動作されるソフトウエアまたはハードウエア自体で構成される。なお、演算部１１は、第１〜第３評価手段１１１、１１２、１１３による計測の結果や判別手段１１４による溶着部５４の溶着状態の良否を表示させる表示手段（ディスプレイ）や、演算部１１に適宜に動作指示を与える入力手段（キーボード、マウス）等を備えていても良い。また、判別手段１１４による判別結果により適宜レーザ光Ｌの照射状態を補正するため、例えばレーザ光発振手段１１２に電気的に接続され、該レーザ光発振手段１１２の発振条件を補正するための補正信号を発生する補正手段を有していてもよい。   The calculation unit 11 is specifically composed of a microcomputer, and the first to third evaluation means 111, 112, 113 and the determination means 114 are stored in a memory built in the microcomputer and are stored in a CPU. It consists of software or hardware itself that runs on The calculation unit 11 displays on the calculation unit 11 a display unit (display) that displays the measurement results of the first to third evaluation units 111, 112, and 113 and the quality of the welded state of the welded portion 54 by the determination unit 114. Input means (keyboard, mouse) or the like for giving operation instructions as appropriate may be provided. Further, in order to appropriately correct the irradiation state of the laser beam L based on the determination result by the determination unit 114, for example, a correction signal that is electrically connected to the laser beam oscillation unit 112 and corrects the oscillation condition of the laser beam oscillation unit 112, for example. You may have the correction means which generate | occur | produces.

以下、第１〜第３評価手段１１１、１１２、１１３の動作について説明する。
第１評価手段１１１は、図２に示すように、監視手段１２２１でモニタされたレーザ光発振手段１２２の電圧が、予め設定された所定の電圧範囲から逸脱する場合には、照射されているレーザ光Ｌのエネルギー量が過大または過少と評価するとともに評価結果（異常・正常と問わない。）を判別手段１１４に伝送する。なお、必要に応じ、モニタされた電圧の状態を判断し、該電圧値の変動が大きい場合やノイズを含む場合には、該電圧値を時間軸方向に移動平均して電圧値の変動を抑制したり、該電圧値に周波数フィルタをかけてノイズを除去する機能を第１評価手段１１１に設けてもよい。 Hereinafter, operations of the first to third evaluation units 111, 112, and 113 will be described.
As shown in FIG. 2, when the voltage of the laser beam oscillation means 122 monitored by the monitoring means 1221 deviates from a preset predetermined voltage range, the first evaluation means 111 irradiates the laser that is irradiated. The energy amount of the light L is evaluated as being excessive or insufficient, and the evaluation result (regardless of whether it is abnormal or normal) is transmitted to the discrimination means 114. If necessary, the state of the monitored voltage is judged, and when the voltage value fluctuates greatly or includes noise, the voltage value is moved and averaged in the time axis direction to suppress the voltage value fluctuation. Alternatively, the first evaluation means 111 may be provided with a function of removing noise by applying a frequency filter to the voltage value.

第２評価手段１１２は、図３（ａ）に示すように、形状計測手段１３であるＣＣＤカメラで撮像された溶着部５４の平面視の画像に基づいて溶着状態、具体的には溶着部５４の剥離強度を推定し、予め設定した所定の剥離強度より推定した剥離強度が下回った場合には異常と評価するとともに評価結果（異常・正常と問わない。）を判別手段１１４へ伝送する。   As shown in FIG. 3A, the second evaluation unit 112 is welded based on a planar view image of the welded portion 54 captured by the CCD camera that is the shape measuring unit 13, specifically, the welded portion 54. The peel strength is estimated, and when the peel strength estimated from a predetermined peel strength set in advance is lower, it is evaluated as abnormal and the evaluation result (whether it is abnormal or normal) is transmitted to the discriminating means 114.

第２評価手段１１２の評価方法について、図３に示すように溶着部５４を直線状に形成した場合で説明する。第１樹脂体５１と第２樹脂体５２との当接面５３に直線状にレーザ光Ｌを照射した場合、同図（ａ）に示すように、第１樹脂体５１のレーザ光吸収率及び第２樹脂体５２のレーザ光吸収率により定まる所定の熱量を有する熱が当接面（すなわちレーザ光吸収部）５３近傍に生じ、その熱量により定まる幅Ｗを有する溶着部５４が形成される。ここで、レーザ光Ｌが照射するエネルギー量は第１評価手段１１１で評価しているので、第１樹脂体５１のレーザ光透過率及び第２樹脂体５２のレーザ光吸収率が一定である限りは、許容最大幅Ｗmaxから許容最小幅Wｍｉｎの間に幅Ｗを有する溶着部５４が形成される。   The evaluation method of the 2nd evaluation means 112 is demonstrated by the case where the welding part 54 is formed linearly as shown in FIG. When the laser beam L is irradiated linearly onto the contact surface 53 between the first resin body 51 and the second resin body 52, as shown in FIG. Heat having a predetermined amount of heat determined by the laser light absorption rate of the second resin body 52 is generated in the vicinity of the contact surface (that is, the laser light absorbing portion) 53, and a weld portion 54 having a width W determined by the amount of heat is formed. Here, since the energy amount irradiated by the laser beam L is evaluated by the first evaluation unit 111, as long as the laser beam transmittance of the first resin body 51 and the laser beam absorption rate of the second resin body 52 are constant. The weld portion 54 having a width W between the allowable maximum width Wmax and the allowable minimum width Wmin is formed.

しかしながら、例えば第１樹脂体５１及び第２樹脂体５２の製造時における不可避のバラツキ、または、第１樹脂体５１と第２樹脂体５２との当接面５３に介在している異物（例えばレーザ光吸収性を低下させる水分や金属、レーザ光吸収性を高める黒鉛等）によるレーザ光透過性またはレーザ光吸収性の変動により、照射されているレーザ光Ｌのエネルギー量が一定である場合でも、当接面５３で生じる熱量が一定しない場合がある。その結果、当接面５３に生じる熱量が過大となると、図３（ｂ）に示すように、溶着部５４の幅Ｗが許容最大幅Ｗmaxよりも大きくなる。この場合には、溶着部５４の表面に過加熱による変質層５４１が形成されやすく、図２（ｂ）に示すように、溶着部５４の剥離強度が劣化する。また、当接面５３に生じる熱量が少ないと、図３（ｃ）に示すように、溶着部５４の幅Ｗが許容最小幅Ｗmｉｎよりも小さくなり、図２（ｂ）に示すように、剥離強度を保つことができない。   However, for example, inevitable variations in the production of the first resin body 51 and the second resin body 52, or foreign matter (for example, lasers) interposed on the contact surface 53 between the first resin body 51 and the second resin body 52 Even when the amount of energy of the irradiated laser beam L is constant due to fluctuations in laser beam permeability or laser beam absorbency due to moisture or metal that reduces light absorption, graphite that increases laser beam absorption) The amount of heat generated at the contact surface 53 may not be constant. As a result, when the amount of heat generated on the contact surface 53 becomes excessive, the width W of the welded portion 54 becomes larger than the allowable maximum width Wmax as shown in FIG. In this case, a deteriorated layer 541 is easily formed on the surface of the welded portion 54 due to overheating, and the peel strength of the welded portion 54 is deteriorated as shown in FIG. Further, if the amount of heat generated on the contact surface 53 is small, the width W of the welded portion 54 becomes smaller than the allowable minimum width Wmin as shown in FIG. 3C, and peeling occurs as shown in FIG. The strength cannot be maintained.

なお、上記剥離強度は、ＪＩＳ Ｋ６８５４−３（接着剤の剥離強さ試験方法）のＴ型剥離試験片を使用して求める方法に準じ測定されたものであり、同規格との相違点は、短冊状のＴ型試験片の幅が９ｍｍであること、Ｔ型試験片の長手方向における接合部の長さが６ｍｍであることである。   The peel strength was measured according to a method obtained using a T-type peel test piece of JIS K6854-3 (adhesive peel strength test method). That is, the width of the strip-shaped T-type test piece is 9 mm, and the length of the joint portion in the longitudinal direction of the T-type test piece is 6 mm.

また、図２（ｂ）においては、レーザ光透過率７５％の第１樹脂体５１及びレーザ光吸収率８０％の第２樹脂体５２とを下記の条件で溶着した場合の溶着部５４の幅・剥離強度を基準値とし、レーザ光吸収率４０〜９５％の間で種々変化させた第２樹脂体５２と上記レーザ光透過率を有する第１樹脂体５１とを同一条件で溶着した溶着部５４の幅・剥離強度を該基準値に対し相対的に示している。
（１）レーザ照射速度：１ｍ／ｍｉｎ
（２）押圧力：１０Ｎ／ｍｍ２
（３）ビームスポット面積：３ｍｍ２
（４）レーザ光発振時の出力：１５０Ｗ In FIG. 2B, the width of the welded portion 54 when the first resin body 51 having a laser beam transmittance of 75% and the second resin body 52 having a laser beam absorbance of 80% are welded under the following conditions. A welded portion in which the second resin body 52 and the first resin body 51 having the above laser light transmittance are welded under the same conditions with the peel strength as a reference value and variously changed between 40 and 95% of the laser light absorption rate. The width / peel strength of 54 is shown relative to the reference value.
(1) Laser irradiation speed: 1 m / min
(2) Pressing force: 10 N / mm 2
(3) Beam spot area: 3 mm 2
(4) Output during laser light oscillation: 150 W

第２評価手段１１２には、上記溶着部５４の幅Ｗと溶着部５４の剥離強度の関係、具体的には図２（ｂ）の図で示されるデータが近似式化またはデータテーブル化され、評価データとして記憶されている。第２評価手段１１２は、ＣＣＤカメラで撮像された溶着部５４の画像を画像処理して溶着部５４の幅Ｗを算出するとともに算出された溶着部５４の幅Ｗを上記評価データと比較し、溶着部５４の剥離強度の良否を評価し、評価結果を判別手段１４４に伝送する。   In the second evaluation means 112, the relationship between the width W of the welded portion 54 and the peel strength of the welded portion 54, specifically, the data shown in the diagram of FIG. It is stored as evaluation data. The second evaluation means 112 performs image processing on the image of the welded portion 54 imaged by the CCD camera to calculate the width W of the welded portion 54 and compares the calculated width W of the welded portion 54 with the evaluation data. The quality of the peel strength of the welded portion 54 is evaluated, and the evaluation result is transmitted to the discrimination means 144.

なお、上記したように当接面５３が過加熱された場合には、溶着部５４の表面に変質層５４１が形成され、第１樹脂体５１を通して観察される溶着部５４の色が周囲の正常部の色と異なる場合もある。したがって、ＣＣＤカメラで観察された溶着部５４の色と周囲の色と第２評価手段１２２で比較して、溶着部５４の溶着状態の良否を評価することもできる。   In addition, when the contact surface 53 is overheated as described above, a deteriorated layer 541 is formed on the surface of the welded portion 54, and the color of the welded portion 54 observed through the first resin body 51 is normal around it. It may be different from the color of the part. Therefore, the quality of the welded portion 54 can be evaluated by comparing the color of the welded portion 54 and the surrounding color observed with the CCD camera with the second evaluation means 122.

第３評価手段１１３は、圧力計測手段１５で計測された押圧部１４による第１樹脂体５１および第２樹脂体５２の押圧力により第１樹脂体５１と第２樹脂体５２とが密着しているか否かを評価するものである。すなわち、上記したように、溶着部５４の幅Ｗに基づいて溶着部５４の剥離強度を評価した場合、図２（ｂ）において符号ｃで示すように、溶着部５４の幅Ｗは所定の範囲に収まっているものの剥離強度が基準値以下となる場合がある。これは、図４に示すように、第１樹脂体５１と第２樹脂体５２とが十分に密着しておらず、溶着部５４を形成すべき当接面５３に隙間が生じている場合である。   The third evaluation unit 113 causes the first resin body 51 and the second resin body 52 to be in close contact by the pressing force of the first resin body 51 and the second resin body 52 by the pressing unit 14 measured by the pressure measurement unit 15. It is to evaluate whether or not. That is, as described above, when the peel strength of the welded portion 54 is evaluated based on the width W of the welded portion 54, the width W of the welded portion 54 is within a predetermined range as indicated by reference numeral c in FIG. However, the peel strength may be below the reference value. As shown in FIG. 4, the first resin body 51 and the second resin body 52 are not sufficiently in close contact with each other, and a gap is generated on the contact surface 53 where the weld portion 54 is to be formed. is there.

したがって、第１態様の溶着装置１は、圧力計測手段１５で計測された溶着中の押圧力に基づいて、第１樹脂体５１と第２樹脂体５２との間に隙間が生じない所定の範囲の押圧力が作用しているか否かを評価し、評価結果を判別手段１１４へ伝送する。   Therefore, the welding apparatus 1 according to the first aspect has a predetermined range in which no gap is generated between the first resin body 51 and the second resin body 52 based on the pressing force during welding measured by the pressure measuring means 15. It is evaluated whether or not the pressing force is applied, and the evaluation result is transmitted to the discrimination means 114.

判別手段１１４は、第１〜第３評価手段１１１、１１２、１１３の評価結果のすべてにより、溶着部５４の溶着状態の良否を判断する。すなわち、第１評価手段１１１によるレーザ光発振手段１２２の電圧の評価と、第２評価手段１１２による溶着部５４の形状の評価と、第３評価手段１１３による押圧力の評価とが、全て良好な場合にのみ溶着部５４の溶着状態が良であると判断する。   The discriminating means 114 judges the quality of the welded state of the welded part 54 from all the evaluation results of the first to third evaluation means 111, 112, and 113. That is, the evaluation of the voltage of the laser beam oscillation means 122 by the first evaluation means 111, the evaluation of the shape of the welded portion 54 by the second evaluation means 112, and the evaluation of the pressing force by the third evaluation means 113 are all good. Only in this case, it is determined that the welded state of the welded portion 54 is good.

上記第１態様の溶着装置１の動作について説明する。
（１）レーザ光照射工程
当接面であるレーザ光吸収部５３を介し第１樹脂体５１と第２樹脂体５２をテーブル１４３上にて重ね合わせ、押圧部１４にて所定の押圧力で第１樹脂体５１を押圧し第１樹脂体５１と第２樹脂体５２を密着させる。次いで、レーザ光照射手段１２１で第１樹脂材５１の側からレーザ光Ｌをレーザ光吸収部５３に照射し該レーザ光吸収部５３に溶着部５４を形成する。
（２）第１評価工程
監視手段１２２１でモニタしているレーザ光発振手段１２２に生じる電圧に基づいてレーザ光照射手段１２１から照射されるレーザ光Ｌのエネルギー量を演算部１１の第１評価手段１１１で評価する。
（３）第２評価工程
形状計測手段（ＣＣＤカメラ）１３により計測された溶着部５３の形状に基づき第２評価手段１１２にて溶着部５４の剥離強度を評価する。
（４）第３評価工程
テーブル１４３に組込まれた圧力計測手段１５で計測した押圧部１４による溶着中の押圧力に基づいて押圧力を評価する。
（５）溶着部の溶着状態の良否を判別する工程
上記第１工程〜第３評価工程における評価に基づいて溶着部５４の溶着状態の良否を判断する。 Operation | movement of the welding apparatus 1 of the said 1st aspect is demonstrated.
(1) Laser light irradiation step The first resin body 51 and the second resin body 52 are overlapped on the table 143 via the laser light absorbing portion 53 that is a contact surface, and the pressing portion 14 performs the first pressing with a predetermined pressing force. The first resin body 51 is pressed to bring the first resin body 51 and the second resin body 52 into close contact. Next, the laser light irradiating means 121 irradiates the laser light absorbing portion 53 with the laser light L from the first resin material 51 side to form the welded portion 54 in the laser light absorbing portion 53.
(2) First Evaluation Step Based on the voltage generated in the laser light oscillation means 122 monitored by the monitoring means 1221, the energy amount of the laser light L emitted from the laser light irradiation means 121 is calculated as the first evaluation means of the calculation unit 11. 111.
(3) Second Evaluation Step Based on the shape of the welded portion 53 measured by the shape measuring means (CCD camera) 13, the second evaluating means 112 evaluates the peel strength of the welded portion 54.
(4) Third Evaluation Step The pressing force is evaluated based on the pressing force during welding by the pressing portion 14 measured by the pressure measuring means 15 incorporated in the table 143.
(5) The process of discriminating the quality of the welded state of the welded part The quality of the welded state of the welded part 54 is judged based on the evaluation in the first to third evaluation steps.

上記溶着装置１の変形例である溶着装置２について図５を参照し説明する。
溶着装置２は、上記第１態様の溶着装置１に、レーザ光Ｌで溶着されている溶着部５４の表面温度を計測する温度計測手段２６を付加したものである。かかる温度計測手段２６は特に限定されるものではないが、非接触で温度の計測が可能な例えば赤外線式温度センサ、放射線式温度センサなどを使用することが望ましい。この温度計測手段２６によれば、該温度計測手段２６で計測された溶着部５４の表面温度に基づき、上記監視手段１２２１に替えて、第１評価手段１１１でレーザ光Ｌのエネルギー量を評価することができる。 A welding apparatus 2 which is a modification of the welding apparatus 1 will be described with reference to FIG.
The welding apparatus 2 is obtained by adding temperature measuring means 26 for measuring the surface temperature of the welded portion 54 welded with the laser beam L to the welding apparatus 1 of the first aspect. The temperature measuring means 26 is not particularly limited, but it is desirable to use, for example, an infrared temperature sensor, a radiation temperature sensor, or the like that can measure temperature without contact. According to this temperature measuring means 26, based on the surface temperature of the welded portion 54 measured by the temperature measuring means 26, the first evaluation means 111 evaluates the energy amount of the laser light L instead of the monitoring means 1221. be able to.

［実施態様２］
本発明の溶着装置を樹脂被覆鋼管の接続部の被覆するために適用した第２態様について、図面に基づき説明する。図６、第２態様の被覆装置の概略構成を示す正面図、図７は図６において矢視ａから見た矢視図、図８は図１で符号３４で示す押圧部の部分拡大図、図９は図６の被覆装置の動作を説明するための図である。 [Embodiment 2]
The 2nd aspect applied in order to coat | cover the connection part of a resin-coated steel pipe with the welding apparatus of this invention is demonstrated based on drawing. FIG. 6 is a front view showing a schematic configuration of the coating apparatus of the second embodiment, FIG. 7 is an arrow view seen from an arrow a in FIG. 6, and FIG. 8 is a partial enlarged view of a pressing portion indicated by reference numeral 34 in FIG. FIG. 9 is a view for explaining the operation of the coating apparatus of FIG.

図６に示すように、第２態様で対象とする樹脂被覆鋼管９は、図において符号９１で示す鋼管の外周面がレーザ光吸収性のある樹脂を主体とした被覆層（第２樹脂体）９２で被覆され、樹脂被覆鋼管８の端部の被覆層９２が取り除かれた状態の物である。被覆層９２は、例えばポリエチレン樹脂などからなり、粘着性のあるブチルゴムなどを介して鋼管９１の外周面に被覆されている。   As shown in FIG. 6, the resin-coated steel pipe 9 targeted in the second embodiment is a coating layer (second resin body) in which the outer peripheral surface of the steel pipe denoted by reference numeral 91 in the figure is mainly a resin that absorbs laser light. It is a thing of the state which was coat | covered with 92 and the coating layer 92 of the edge part of the resin-coated steel pipe 8 was removed. The covering layer 92 is made of, for example, polyethylene resin, and is covered on the outer peripheral surface of the steel pipe 91 via adhesive butyl rubber or the like.

符号９３は、２本の樹脂被覆鋼管９ａ，９ｂの露出した鋼管９１の端面同士の全周が突合せ溶接され接続されてなる接続部である。通常、この種の樹脂被覆鋼管９を接合する場合には開先を取って全周溶接するが、開先を取らずに溶接してもよい。この接続部９３は溶接の熱により変質しているため水分や化学物質などで腐食しやすい。したがって、溶接接続後に接続部９３を包囲するように接合部９３の両側の被覆層９２の外周面に防食膜（第１樹脂体）８を巻設した後に防食膜８と被覆層９２とを接合し、防食膜８の内面、被覆層９２の端面および鋼管９１の表面で区画され密閉された密閉空間７の中で接続部９３を保護する。   Reference numeral 93 is a connecting portion formed by butt-welding and connecting the entire peripheries of the end surfaces of the exposed steel pipes 91 of the two resin-coated steel pipes 9a and 9b. Usually, when joining this kind of resin-coated steel pipe 9, a groove is taken and the entire circumference is welded, but welding may be performed without taking a groove. Since the connecting portion 93 has been altered by the heat of welding, it is likely to be corroded by moisture or chemical substances. Therefore, the anticorrosion film 8 and the covering layer 92 are joined after the anticorrosion film (first resin body) 8 is wound around the outer peripheral surface of the covering layer 92 on both sides of the joining portion 93 so as to surround the connecting portion 93 after welding connection. Then, the connection portion 93 is protected in the sealed space 7 that is partitioned and sealed by the inner surface of the anticorrosion film 8, the end surface of the coating layer 92, and the surface of the steel pipe 91.

防食膜８は、被覆層９２と同様な材料例えばポリエチレン樹脂を主体とした伸縮性のあるチューブ状を成したレーザ光透過性のある物であり、その内径は樹脂被覆鋼管９の直径よりやや小さく、その長さは接続部９３の両側の被覆層９２に重ね合わすことができる長さで形成されている。このチューブ状の防食膜８は、２本の樹脂被覆鋼管９ａ，９ｂを接続する前に一方の樹脂被覆鋼管９ａに通しておき、樹脂被覆鋼管９ａ，９ｂの接続後に所定の位置に移動させることにより接続部９３を包囲するように被覆層９２にほぼ密着して重ね合わされた状態とされる。このチューブ状の防食膜８を用いて樹脂被覆鋼管９を被覆する場合には、樹脂被覆鋼管９の長手方向において一方の樹脂被覆鋼管９ａの被覆層９２と重合している溶着部８ａ、他方の樹脂被覆鋼管９ｂの被覆層９２と重合している溶着部８ｂの２箇所について防食膜８を被覆層９２と接合する。   The anticorrosion film 8 is a laser-light-transmitting material in the form of a stretchable tube mainly composed of polyethylene resin, for example, the same material as the coating layer 92, and its inner diameter is slightly smaller than the diameter of the resin-coated steel pipe 9. The length of the connecting portion 93 is such that it can be superimposed on the covering layer 92 on both sides of the connecting portion 93. This tube-shaped anticorrosion film 8 is passed through one resin-coated steel pipe 9a before connecting the two resin-coated steel pipes 9a and 9b, and moved to a predetermined position after connecting the resin-coated steel pipes 9a and 9b. As a result, the cover layer 92 is brought into close contact with the covering layer 92 so as to surround the connecting portion 93. When the resin-coated steel pipe 9 is coated using the tubular anticorrosive film 8, the welded part 8a that is polymerized with the coating layer 92 of one resin-coated steel pipe 9a in the longitudinal direction of the resin-coated steel pipe 9, and the other The anticorrosion film 8 is joined to the coating layer 92 at two locations of the welded portion 8b that is polymerized with the coating layer 92 of the resin-coated steel pipe 9b.

その防食膜８を被覆層９２の外周面に接合する被覆装置３は、図６，７に示すように、基本的な構成として、下方に向けてレーザ光Ｌを照射するレーザ光照射手段３１１を備えたレーザ光照射部３１と、防食膜８の表面をレーザ光Ｌが照射可能な状態でレーザ光照射手段３１１を樹脂被覆鋼管９の軸心廻りに回転させる回転部３２と、前記防食膜の表面において前記レーザ光が投影されてなる照射領域Ａに含まれる防食膜８を被覆層９２に対し所定の力で押圧する押圧部３４（図４参照）と、第１態様と同様な形状計測手段３３と、第１態様と同様な第１〜第３評価手段を内蔵した演算部（不図示）とを有している。以下、被覆装置３の各構成要素について説明するが、第１態様の演算部１１、レーザ光照射部１２及び形状計測手段１３と本態様の演算部、レーザ光照射部３１及び形状計測手段３３は同様な構成であるので説明を省略する。なお、不図示の演算部及びレーザ光発振手段は、図１において符号Ａで示す範囲と同様な構成のものが、溶着装置３に組込まれている。   The coating apparatus 3 that joins the anticorrosion film 8 to the outer peripheral surface of the coating layer 92 has, as shown in FIGS. 6 and 7, a laser beam irradiation means 311 that irradiates a laser beam L downward as a basic configuration. A laser beam irradiation unit 31 provided; a rotating unit 32 that rotates the laser beam irradiation means 311 around the axis of the resin-coated steel tube 9 in a state in which the surface of the corrosion protection film 8 can be irradiated with the laser beam L; A pressing portion 34 (see FIG. 4) that presses the anticorrosion film 8 included in the irradiation region A formed by projecting the laser beam on the surface against the coating layer 92 with a predetermined force, and a shape measuring unit similar to the first mode 33 and a calculation unit (not shown) including first to third evaluation means similar to those of the first mode. Hereinafter, although each component of the coating apparatus 3 is demonstrated, the calculating part 11, the laser beam irradiation part 12, and the shape measurement means 13 of a 1st aspect, the calculation part of this aspect, the laser beam irradiation part 31, and the shape measurement means 33 are Since it is the same structure, description is abbreviate | omitted. Note that the calculation unit and the laser beam oscillation unit (not shown) have the same configuration as the range indicated by the symbol A in FIG.

［回転手段］
回転部３２は、樹脂被覆鋼管９の外周面を取り囲み周設される略円環状の案内手段３２１と、樹脂被覆鋼管９の軸心廻りに回転する方向のみに摺動可能に案内手段３２１に嵌着された支持部材３２３と、前記支持部材３２３に配設されるとともに前記案内手段３２１に係合して支持部材３２３を樹脂被覆鋼管９の軸心廻りに回転させる回転駆動手段３２２とから構成されている。なお、前記レーザ光照射手段３１１は、防食膜８の表面をレーザ光Ｌが照射できるようにレーザ光Ｌを照射する先端部が下方に向けられた状態で後述する水平駆動手段３２４、焦点調整手段３２５を介して支持部材３２３に取付けられている。 [Rotating means]
The rotating portion 32 is fitted to the guide means 321 so as to be slidable only in the direction of rotation around the axis of the resin-coated steel pipe 9 and the substantially annular guide means 321 that surrounds and surrounds the outer peripheral surface of the resin-coated steel pipe 9. The support member 323 is attached to the support member 323, and the rotation drive unit 322 is disposed on the support member 323 and engages with the guide unit 321 to rotate the support member 323 around the axis of the resin-coated steel pipe 9. ing. The laser light irradiation means 311 includes a horizontal driving means 324 and a focus adjustment means, which will be described later, in a state in which the tip of the laser light L is directed downward so that the surface of the anticorrosion film 8 can be irradiated with the laser light L. It is attached to the support member 323 via 325.

案内手段３２１は、樹脂被覆鋼管９の被覆層９２の外周面に下面が接触するように配置可能な等間隔で設けられた略円柱形状の６本の支柱３２１３と、樹脂被覆鋼管９の外径より大きな内径を有し樹脂被覆鋼管９の外周面に前記支柱３２１３を介して支持され固定される略円環状のベース部材３２１１と、軸心方向においてベース部材３２１１の中央部に配設された案内部材である連続して複数の歯面が並設された円環状のラック３２１２とからなる。この案内手段３２１は、樹脂被覆鋼管９への取付けが容易に行なえるように上部案内手段３２１ａ、下部案内手段３２１ｂと上下に２つに分割された構造となっている。   The guide means 321 includes six substantially columnar columns 3213 provided at equal intervals so that the lower surface can contact the outer peripheral surface of the coating layer 92 of the resin-coated steel tube 9, and the outer diameter of the resin-coated steel tube 9. A substantially annular base member 3211 having a larger inner diameter and supported and fixed to the outer peripheral surface of the resin-coated steel pipe 9 via the support columns 3213, and a guide disposed in the central portion of the base member 3211 in the axial direction. It is composed of an annular rack 3212 which is a member and is provided with a plurality of continuous tooth surfaces. The guide means 321 has a structure that is divided into an upper guide means 321a and a lower guide means 321b and vertically divided into two so that attachment to the resin-coated steel pipe 9 can be easily performed.

回転駆動手段３２２は、ラック３２１２に噛合う駆動部材である歯車３２２１と、該歯車３２２１に連結し歯車３２２１を回転させる回転駆動部材である電動機３２２２とからなる。回転駆動手段３２２は支持部材３２３に取付けられているので、その歯車３２２１が電動機３２２２で回転されることにより支持部材３２３は樹脂被覆鋼管９の軸心廻りに回転することとなる。なお、前記案内部材と駆動部材はラック３２１２と歯車３２２１の組合せ以外の構成を採ることができ、例えば案内部材としてＴ字状のレールを駆動部材として摩擦車を組込むようにしてもよい。   The rotation driving means 322 includes a gear 3221 that is a driving member that meshes with the rack 3212, and an electric motor 3222 that is connected to the gear 3221 and rotates the gear 3221. Since the rotation driving means 322 is attached to the support member 323, the support member 323 rotates about the axis of the resin-coated steel pipe 9 by rotating the gear 3221 thereof by the electric motor 3222. The guide member and the drive member may have a configuration other than the combination of the rack 3212 and the gear 3221. For example, a friction wheel may be incorporated using a T-shaped rail as the drive member as the drive member.

この回転部３２には、上記した基本的な構成に加えて、被覆装置３の操作・取扱いの容易化および自動化のため好ましい構成として、水平駆動手段３２４と焦点調整手段３２５が組込まれている。水平駆動手段３２４は、前記レーザ光照射手段３１１を樹脂被覆鋼管９の軸心方向すなわち水平方向に移動させるものであり、例えばエアシリンダや直動型アクチュエータなど周知のもので構成することができる。また、焦点調整手段３２５は、レーザ光Ｌの焦点の位置を調整するためレーザ光照射手段３１１を上下方向に位置合わせするものである。水平駆動手段３２４は、支持部材３２３に取付けられ、その先端に焦点調整手段３２５が固定されている。レーザ光照射手段３１１は、その焦点調整手段３２５に取付けられている。また、被覆装置３は、回転駆動手段３２２、水平駆動手段３２４およびレーザ光発信手段の動作制御のため、電気通信回路を介してそれらが接続された制御手段を備えており、レーザ光照射手段３１１が回転および水平移動される際の速度制御や位置制御、レーザ光Ｌを照射する際の照射条件の制御を設定した条件等で自動的に行なえる構成となっている。   In addition to the basic configuration described above, the rotating unit 32 incorporates a horizontal driving unit 324 and a focus adjusting unit 325 as a preferable configuration for facilitating and automating operation and handling of the coating apparatus 3. The horizontal drive means 324 moves the laser beam irradiation means 311 in the axial direction of the resin-coated steel pipe 9, that is, in the horizontal direction, and can be constituted by a well-known device such as an air cylinder or a direct acting actuator. The focus adjustment unit 325 aligns the laser beam irradiation unit 311 in the vertical direction in order to adjust the focal position of the laser beam L. The horizontal driving means 324 is attached to the support member 323, and a focus adjusting means 325 is fixed to the tip thereof. The laser beam irradiation means 311 is attached to the focus adjustment means 325. Further, the coating apparatus 3 includes control means connected to each other via an electric communication circuit for controlling the operation of the rotation drive means 322, the horizontal drive means 324, and the laser light transmission means, and the laser light irradiation means 311. Is configured to be automatically performed under conditions such as speed control and position control when rotating and horizontally moving, and control of irradiation conditions when irradiating the laser beam L.

［押圧手段］
押圧部３４について図８を参照し説明する。図８（ａ）は押圧部３４の正面断面図、図８（ｂ）は図８（ａ）の右側面図である。本態様の押圧部３４は、一対のローラ状の押圧手段３４１と、押圧手段３４１を加圧して被覆層９２の表面に押圧する加圧手段３４２とから構成され、図８（ｂ）に示すように、レーザ光照射手段３１１から伸びた、平面視においてレーザ光Ｌが通過する部分が欠けている略コの字状の連結部材３４３の両椀にそれぞれ取付けられている。 [Pressing means]
The pressing part 34 will be described with reference to FIG. 8A is a front sectional view of the pressing portion 34, and FIG. 8B is a right side view of FIG. 8A. The pressing portion 34 of this aspect is composed of a pair of roller-shaped pressing means 341 and a pressing means 342 that presses the pressing means 341 and presses it against the surface of the coating layer 92, as shown in FIG. 8B. Further, they are respectively attached to both ends of a substantially U-shaped connecting member 343 extending from the laser beam irradiation means 311 and lacking a portion through which the laser beam L passes in a plan view.

押圧手段３４１は、図８（ａ）に示すように、防食膜８に当接する胴体と回転軸とを有するローラ３４１１と回転軸を回転可能に軸支するハウジング３４１２とからなり、ハウジング３４１２とローラ３４１１の回転軸との間にはすべり軸受３４１３が嵌着されている。ここで符号Ａは、防食膜８の表面においてレーザ光Ｌが投影されてなる照射領域（いわゆるレーザスポット）であり、押圧手段３４１は、照射領域Ａの外側すなわち非照射領域であって図において矢印で示すレーザ光照射手段３１１の回転方向に沿い相対する位置に配設されている。したがって、一対の押圧手段３４１は照射されるレーザ光Ｌに押圧手段３４１が直接触れず、該一対の押圧手段３４１の間で形成される平面内に照射領域Ａを実質的に包含することとなる。なお、押圧手段３４１は、レーザ光Ｌに触れない範囲で出来るだけ照射領域Ａの近くに配設することが望ましい。   As shown in FIG. 8A, the pressing means 341 includes a roller 3411 having a body that contacts the anticorrosion film 8 and a rotating shaft, and a housing 3412 that rotatably supports the rotating shaft. A slide bearing 3413 is fitted between the rotating shaft 3411. Here, symbol A is an irradiation region (so-called laser spot) formed by projecting the laser beam L on the surface of the anticorrosion film 8, and the pressing means 341 is outside the irradiation region A, that is, a non-irradiation region. The laser beam irradiation means 311 shown in FIG. Therefore, the pair of pressing means 341 does not directly touch the irradiated laser beam L, and the irradiation region A is substantially included in a plane formed between the pair of pressing means 341. . Note that it is desirable that the pressing unit 341 is disposed as close to the irradiation region A as possible without touching the laser beam L.

加圧手段３４２は、図８（ａ）に示すように、押圧手段３４１のハウジング３４１２の上部に形成された螺子孔に螺設されるとともに連結部材３４３に形成された孔３４３１に上下方向に移動自在に挿入された２本の支持軸３４２２と、支持軸３４２２に挿着された圧縮バネ３４２１とからなり、押圧手段３４１のローラ３４１１が防食膜８に当接したときに圧縮バネ３４２１が所定の量だけ圧縮され、押圧手段３４１を所定の力で下方に押圧するように構成されている。また、符号３５は、圧縮バネ３４２１と連結部材３４３との間に位置するように支持軸３４２２に嵌着された圧力計測手段である圧力センサであり、圧縮バネ３４２１で生じた押圧力を計測する。なお、加圧手段３４２は上記に限らず、例えばエアシリンダや直動型アクチュエータなど周知の構成を採ることができる。   As shown in FIG. 8A, the pressurizing unit 342 is screwed into a screw hole formed in the upper portion of the housing 3412 of the pressing unit 341 and moves in a vertical direction to a hole 3431 formed in the connecting member 343. It consists of two support shafts 3422 inserted freely and a compression spring 3421 inserted into the support shaft 3422. When the roller 3411 of the pressing means 341 contacts the anticorrosion film 8, the compression spring 3421 The pressure means 341 is compressed by an amount and is configured to press the pressing means 341 downward with a predetermined force. Reference numeral 35 denotes a pressure sensor which is a pressure measuring means fitted to the support shaft 3422 so as to be positioned between the compression spring 3421 and the connecting member 343, and measures the pressing force generated by the compression spring 3421. . Note that the pressurizing unit 342 is not limited to the above, and may employ a known configuration such as an air cylinder or a direct acting actuator.

上記押圧部３４は、連結部材３４３がレーザ光照射手段３１１に取付けられているので、回転駆動手段３２２によるレーザ光照射手段３１１の回転と同期してレーザ光Ｌの照射領域Ａとの位置関係を保ちつつ移動する。そして、その押圧部１４１は、防食膜８の表面に当接するとともに加圧部１４２で防食膜８に押圧されているので、照射領域Ａにおける防食膜８は、該押圧部１４１で被覆層９２に押し付けられ被覆層９２と密着している状態となる。   Since the connecting member 343 is attached to the laser beam irradiation unit 311, the pressing portion 34 has a positional relationship with the irradiation region A of the laser beam L in synchronization with the rotation of the laser beam irradiation unit 311 by the rotation driving unit 322. Move while keeping. And since the pressing part 141 contacts the surface of the anticorrosion film 8 and is pressed against the anticorrosion film 8 by the pressurizing part 142, the anticorrosion film 8 in the irradiation area A is applied to the coating layer 92 by the pressing part 141. The pressed state comes into close contact with the covering layer 92.

上記構成の被覆装置３による被覆方法について図９を参照し説明する。
まず、図９（ａ）、（ｂ）に示すように、レーザ光照射手段３１１が頂部に固定された上部案内手段３２１ａを樹脂被覆鋼管９の上側に置き、次に樹脂被覆鋼管９の下方から下部案内手段３２１ｂを上部案内手段３２１ａと接続し、被覆装置３を組み上げるとともに防食膜８と被覆層９２の一方の溶着部８ａにレーザ光Ｌが照射されるように樹脂被覆鋼管９の軸心方向について被覆装置３の位置を調整し、被覆装置３を固定する。その後、焦点調整手段３２５によりレーザ光照射手段３１１の高さを変えてレーザ光Ｌの焦点位置を調整する。 A coating method by the coating apparatus 3 having the above configuration will be described with reference to FIG.
First, as shown in FIGS. 9 (a) and 9 (b), the upper guide means 321a having the laser beam irradiation means 311 fixed to the top is placed on the upper side of the resin-coated steel pipe 9, and then from below the resin-coated steel pipe 9. The lower guide means 321b is connected to the upper guide means 321a, the coating apparatus 3 is assembled, and the welded portion 8a of the anticorrosion film 8 and the coating layer 92 is irradiated with the laser beam L in the axial direction of the resin-coated steel pipe 9 The position of the coating device 3 is adjusted for and the coating device 3 is fixed. Thereafter, the focus adjustment unit 325 changes the height of the laser beam irradiation unit 311 to adjust the focal position of the laser beam L.

次に、図９（ｃ）に示すように、被覆装置３を起動して制御手段に設定した条件で樹脂被覆鋼管９の中心からみて反時計回りにレーザ光照射手段３１１を所定の速度で回転させてレーザ光Ｌを円周方向に走査しつつ防食膜８と被覆層９２の溶着部８ａにレーザ光Ｌを照射していく。ここで、図８に基づいて説明したように、上記押圧部３４はレーザ光照射手段３１１の回転とともにレーザ光Ｌの照射領域Ａとの位置関係を保ちつつ移動するので、レーザ光Ｌの走査される円周方向に沿い相対する位置の防食膜８の表面は、押圧手段３４１で押圧されている状態となっている（図８参照）。つまり、この押圧手段３４１の内側にある照射領域Ａに対応した防食膜８は被覆層９２に押し付けられている。したがって、レーザ光Ｌが照射され防食膜８と被覆層９２が溶融・固化されているときの照射領域Ａの防食膜８と被覆層９２とは常に密着している状態にあるので、接合する際の被覆層９２からの防食膜８の浮き上がりが防止され、良好な接合状態が実現される。   Next, as shown in FIG. 9 (c), the laser beam irradiation means 311 is rotated at a predetermined speed counterclockwise as viewed from the center of the resin-coated steel pipe 9 under the conditions set in the control means by starting the coating device 3. The laser beam L is irradiated to the welded portion 8a of the anticorrosion film 8 and the coating layer 92 while scanning the laser beam L in the circumferential direction. Here, as described with reference to FIG. 8, the pressing portion 34 moves while maintaining the positional relationship with the irradiation region A of the laser light L as the laser light irradiation means 311 rotates, so that the laser light L is scanned. The surface of the anticorrosion film 8 at a position facing along the circumferential direction is pressed by the pressing means 341 (see FIG. 8). That is, the anticorrosion film 8 corresponding to the irradiation region A inside the pressing means 341 is pressed against the coating layer 92. Therefore, the anticorrosion film 8 and the coating layer 92 in the irradiation region A when the laser light L is irradiated and the anticorrosion film 8 and the coating layer 92 are melted and solidified are always in close contact with each other. The anti-corrosion film 8 is prevented from being lifted from the coating layer 92, and a good bonding state is realized.

次に、図９（ｄ）に示すように、レーザ光照射手段３１１を樹脂被覆鋼管９の廻りを一回転させることにより、一方の溶着部８ａについて防食膜８と被覆層９２の接合が終了する。このとき、レーザ光照射手段３１１はレーザ光Ｌを照射しつつ樹脂被覆鋼管９の廻りを連続的に回転しているので、防食膜８と被覆層９２の溶着部は、接合の開始点から終了点まで切れ目無く連続した一条の筋状に形成されている。   Next, as shown in FIG. 9 (d), the laser light irradiation means 311 is rotated once around the resin-coated steel tube 9, thereby completing the bonding of the anticorrosion film 8 and the coating layer 92 at one welded portion 8a. . At this time, since the laser beam irradiation means 311 continuously rotates around the resin-coated steel pipe 9 while irradiating the laser beam L, the welded portion of the anticorrosion film 8 and the coating layer 92 ends from the start point of joining. It is formed in a single continuous streak pattern without any breaks.

ここで、溶着装置３においても、上記溶着装置１と同様に、監視手段１２２１でモニタしているレーザ光発振手段１２２の電圧に基づいてレーザ光照射手段３１１から照射されるレーザ光Ｌのエネルギー量を第１評価手段１１１で評価し（第１評価工程）、形状計測手段（ＣＣＤカメラ）３３により計測された溶着部８ａの形状に基づき第２評価手段１１２にて溶着部５４の剥離強度を評価し（第２評価工程）、圧力計測手段３５で計測した押圧部３４による溶着中の押圧力に基づいて押圧力を評価す第３評価工程し（第３評価工程）、上記第１工程〜第３評価工程における評価に基づいて溶着部８ａの溶着状態の良否を判断する。   Here, also in the welding apparatus 3, as in the welding apparatus 1, the energy amount of the laser light L irradiated from the laser light irradiation means 311 based on the voltage of the laser light oscillation means 122 monitored by the monitoring means 1221. Is evaluated by the first evaluation means 111 (first evaluation step), and the peel strength of the welded portion 54 is evaluated by the second evaluating means 112 based on the shape of the welded portion 8a measured by the shape measuring means (CCD camera) 33. (Second evaluation step), a third evaluation step for evaluating the pressing force based on the pressing force during welding by the pressing portion 34 measured by the pressure measuring means 35 (third evaluation step), and the first to second steps. The quality of the welding state of the welding part 8a is judged based on the evaluation in 3 evaluation processes.

次に、図９（ｅ）に示すように、他方の溶着部８ｂを接合するため溶着部８ｂの位置に合わせて被覆装置３を固定し、上記と同様に溶着部８ｂの防食膜８と被覆層９２を接合する。その結果、チューブ状の防食膜８の両端は被覆層９２と接合された状態となり、図６に示すように、該防食膜８、被覆層９２および鋼管９１とで形成された密閉空間７は密閉された状態となり、接続部９３は外気から遮断され腐食等が防止される。なお、本態様の被覆方法では、溶着部８ａの接合完了後に、被覆装置３を樹脂被覆鋼管９から一旦取り外し溶着部８ｂの位置に付け替えたが、溶着部８ａの接合完了後に、溶着部８ｂの位置までレーザ光照射手段３１１を水平駆動手段３２４で水平移動させて、溶着部８ｂを接合するようにすれば作業が効率的になり好ましい。   Next, as shown in FIG. 9 (e), in order to join the other welded portion 8b, the coating device 3 is fixed in accordance with the position of the welded portion 8b, and the anticorrosion film 8 of the welded portion 8b is covered with the same as described above. Layer 92 is bonded. As a result, both ends of the tube-shaped anticorrosion film 8 are joined to the covering layer 92, and the sealed space 7 formed by the anticorrosion film 8, the covering layer 92, and the steel pipe 91 is sealed as shown in FIG. Thus, the connecting portion 93 is blocked from the outside air and corrosion or the like is prevented. In the coating method of this aspect, after the welding of the welded portion 8a is completed, the coating device 3 is once removed from the resin-coated steel pipe 9 and replaced with the position of the welded portion 8b. It is preferable that the laser beam irradiation means 311 is horizontally moved to the position by the horizontal driving means 324 so that the welding portion 8b is joined, because the work becomes efficient.

本発明の第１態様の溶着装置の概略構成図である。It is a schematic block diagram of the welding apparatus of the 1st aspect of this invention. 図１の溶着装置が照射するレーザ光のエネルギー量の監視状態および樹脂体の溶着部の大きさと強度との関係を説明する図である。It is a figure explaining the relationship between the monitoring state of the energy amount of the laser beam with which the welding apparatus of FIG. 1 irradiates, and the magnitude | size and intensity | strength of the welding part of a resin body. 図１の樹脂体の溶着部の大きさと強度との相関の関係を説明する図である。It is a figure explaining the correlation of the magnitude | size and intensity | strength of the welding part of the resin body of FIG. 図１の樹脂体同士の間に隙間が生じている場合に形成された溶着部を示す図である。It is a figure which shows the welding part formed when the clearance gap has arisen between the resin bodies of FIG. 図１の溶着装置の変形例の概略構成図である。It is a schematic block diagram of the modification of the welding apparatus of FIG. 本発明の第２態様の被覆装置３の概略構成を示す正面図である。It is a front view which shows schematic structure of the coating | coated apparatus 3 of the 2nd aspect of this invention. 図６について矢視ａから見た矢視図である。It is the arrow view seen from arrow view a about FIG. 図６の押圧部の部分拡大図である。It is the elements on larger scale of the press part of FIG. 図６の被覆装置の動作を説明するための図である。It is a figure for demonstrating operation | movement of the coating | coated apparatus of FIG.

符号の説明Explanation of symbols

１（２） ：溶着装置
１１ ：演算部
１１１ ：第１評価手段
１１２ ：第２評価手段
１１３ ：第３評価手段
１２ ：レーザ光照射部
１２１ ：レーザ光照射手段
１２２ ：レーザ光発振手段
１２２１：監視手段
１３ ：形状計測手段
１４ ：押圧部
１４１ ：押圧手段
１４２ ：押圧部材
１４３ ：テーブル
１５ ：圧力検出手段
３ ：被覆装置
３１ ：レーザ照射部
３１１ ：レーザ照射手段
３１２ ：レーザ発信手段
３１３ ：光ファイバ
３２ ：回転部
３２１ ：案内手段
３２２ ：回転駆動手段
３２３ ：支持部材
３２４ ：水平駆動手段
３２５ ：焦点調整手段
３３ ：形状計測手段
３４ ：押圧部
３４１ ：押圧手段
３４２ ：加圧手段
３４３ ：連結部材
３５ ：圧力検出手段
５１ ：第１樹脂体
５２ ：第２樹脂体
８ ：防食膜
８１ ：重合部
８２ ：突合部
９ ：樹脂被覆鋼管
９１ ：鋼管
９２ ：被覆層
９３ ：接合部 1 (2): welding apparatus 11: calculation unit 111: first evaluation unit 112: second evaluation unit 113: third evaluation unit 12: laser beam irradiation unit 121: laser beam irradiation unit 122: laser beam oscillation unit 1221: monitoring Means 13: Shape measuring means 14: Pressing part 141: Pressing means 142: Pressing member 143: Table 15: Pressure detecting means 3: Coating device 31: Laser irradiation part 311: Laser irradiation means 312: Laser transmitting means 313: Optical fiber 32 : Rotating part 321: guiding means 322: rotating driving means 323: support member 324: horizontal driving means 325: focus adjusting means 33: shape measuring means 34: pressing part 341: pressing means 342: pressing means 343: connecting member 35: Pressure detecting means 51: first resin body 52: second resin body 8: anticorrosion film 81: polymerization portion 2: butting portion 9: resin-coated steel pipe 91: steel pipe 92: coating layer 93: joint

Claims (9)

レーザ光透過性を有する第１樹脂体と、第２樹脂体とを、管の外周面上で重ね合わせ、レーザ光吸収性を有するレーザ光吸収部を介し、第１樹脂体と第２樹脂体とをレーザ光で溶着する樹脂体の溶着方法であって、レーザ光吸収部を介して重ね合わされた第１樹脂体と第２樹脂体のレーザ光が照射される領域を挟む、管の外周方向前後を所定の押圧力で押圧し、第１樹脂体の側からレーザ光をレーザ光吸収部に照射し該レーザ光吸収部に溶着部を形成するレーザ光照射工程と、前記レーザ光の熱量を評価する第１評価工程と、前記溶着部の形状を評価する第２評価工程と、前記押圧力を評価する第３評価工程を少なくとも含み、第１工程乃至第３評価工程における評価に基づいて溶着部の溶着状態の良否を判別する樹脂体の溶着方法。 The first resin body and the second resin body having the laser beam transparency are overlapped on the outer peripheral surface of the tube , and the first resin body and the second resin body are interposed via the laser beam absorber having the laser beam absorbability. Of the resin body with the laser beam, and the outer circumferential direction of the tube sandwiching the region irradiated with the laser light of the first resin body and the second resin body superimposed via the laser light absorbing portion before and after pressing with a predetermined pressure, and the laser beam irradiation step by irradiating the laser light absorption unit to form a welded portion to the laser light absorption unit of the laser beam from the side of the first resin body, the heat of the laser beam It includes at least a first evaluation step to be evaluated, a second evaluation step to evaluate the shape of the welded portion, and a third evaluation step to evaluate the pressing force, and welding is performed based on the evaluation in the first to third evaluation steps. Resin body welding method for discriminating the quality of the welded part. 前記第１樹脂体は伸縮性を有する膜状の樹脂体であり、前記第２の樹脂体は管の外周面上に被覆された樹脂体であることを特徴とする請求項１に記載の樹脂体の溶着方法。2. The resin according to claim 1, wherein the first resin body is a film-like resin body having elasticity, and the second resin body is a resin body coated on an outer peripheral surface of a pipe. Body welding method. 前記第１評価工程において、レーザ光の発振状態に基づいて算出したレーザ光の熱量に基づいて溶着状態の良否を判別する請求項１または２に記載の樹脂体の溶着方法。 The method for welding a resin body according to claim 1 or 2 , wherein in the first evaluation step, the quality of the welded state is determined based on the amount of heat of the laser light calculated based on the oscillation state of the laser light. 前記レーザ光照射工程において前記溶着部を筋状に形成するとともに、前記第２評価工程において計測した該溶着部の幅に基づいて溶着状態の良否を判別する請求項１または２に記載の樹脂体の溶着方法。 3. The resin body according to claim 1, wherein the welded portion is formed in a streak shape in the laser light irradiation step, and the quality of the welded state is determined based on the width of the welded portion measured in the second evaluation step. Welding method. レーザ光透過性を有する第１樹脂体と、第２樹脂体とを、管の外周面上で重ね合わせ、レーザ光吸収性を有するレーザ光吸収部を介し、第１樹脂体と第２樹脂体とをレーザ光で溶着する樹脂体の溶着装置であって、
（１）前記レーザ光吸収部を介して重ね合わされた前記第１樹脂体と前記第２樹脂体のレーザ光が照射される領域を挟む、管の外周方向前後を所定の押圧力で押圧する押圧部と、
（２）前記第１樹脂体の側からレーザ光を前記レーザ光吸収部に照射し該レーザ光吸収部に溶着部を形成するレーザ光照射部と、
（３）前記レーザ光照射部から照射されるレーザ光の熱量を評価する第１評価手段と、前記レーザ光照射部で形成された溶着部の形状を評価する第２評価手段と、前記押圧部の押圧力を評価する第３評価手段と、第１乃至第３評価手段の評価に基づいて溶着部の溶着状態の良否を判別する判別手段とを有する演算部と
を備えた樹脂体の溶着装置。 The first resin body and the second resin body having the laser beam transparency are overlapped on the outer peripheral surface of the tube , and the first resin body and the second resin body are interposed via the laser beam absorber having the laser beam absorbability. A resin body welding apparatus for welding with a laser beam,
(1) Press that presses the front and rear in the outer circumferential direction of the tube with a predetermined pressing force across the region irradiated with the laser light of the first resin body and the second resin body that are overlapped via the laser light absorbing portion And
(2) a laser beam irradiation unit that irradiates the laser beam absorption unit with laser light from the first resin body side to form a welded portion on the laser beam absorption unit;
(3) First evaluation means for evaluating the amount of heat of the laser light irradiated from the laser light irradiation section, second evaluation means for evaluating the shape of the welded portion formed by the laser light irradiation section, and the pressing section Apparatus for welding a resin body, comprising: a third evaluation unit that evaluates the pressing force of the welding unit; and a calculation unit that includes a determination unit that determines the quality of the welded portion based on the evaluation of the first to third evaluation units. . 前記第１樹脂体は伸縮性を有する膜状の樹脂体であり、前記第２の樹脂体は管の外周面上に被覆された樹脂体であることを特徴とする請求項５に記載の樹脂体の溶着装置。6. The resin according to claim 5, wherein the first resin body is a film-like resin body having elasticity, and the second resin body is a resin body coated on an outer peripheral surface of a pipe. Body welding device. 前記レーザ光の発振状態をモニタする監視手段を有し、前記第１評価手段は、前記監視手段によりモニタされたレーザ光の発振状態に基づいてレーザ光の熱量を評価する請求項５または６に記載の樹脂体の溶着装置。 It has a monitoring means for monitoring the oscillation state of the laser beam, said first evaluation means, to claim 5 or 6 for evaluating the heat of the laser light based on the oscillation state of the laser beam monitored by the monitoring unit The resin body welding apparatus as described. 前記レーザ光照射部から照射されるレーザ光を前記当接面に沿い移動させるレーザ光移動手段と前記レーザ光照射手段により形成された溶着部の形状を計測する形状計測手段とを有し、前記第２評価手段は、前記形状計測手段で計測された溶着部の形状に基づいて溶着部の形状を評価する請求項５または６に記載の溶着装置。 A laser beam moving unit that moves the laser beam emitted from the laser beam irradiation unit along the contact surface, and a shape measuring unit that measures the shape of the welded portion formed by the laser beam irradiation unit, The welding apparatus according to claim 5 or 6 , wherein the second evaluation means evaluates the shape of the welded part based on the shape of the welded part measured by the shape measuring means. 前記押圧部が発生する押圧力を計測する圧力計測手段を有し、前記第３評価手段は、前記圧力計測手段で計測された押圧力に基づいて押圧力を評価する請求項５または６に記載の樹脂体の溶着装置。
Has a pressure measuring means for measuring a pressing force the pressing portion is generated, the third evaluation means, according to claim 5 or 6 for evaluating the pressing force based on the pressure measured by the pressure measuring means Resin body welding equipment.
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