WO2014156323A1 - 流量センサ - Google Patents
流量センサ Download PDFInfo
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- WO2014156323A1 WO2014156323A1 PCT/JP2014/052832 JP2014052832W WO2014156323A1 WO 2014156323 A1 WO2014156323 A1 WO 2014156323A1 JP 2014052832 W JP2014052832 W JP 2014052832W WO 2014156323 A1 WO2014156323 A1 WO 2014156323A1
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- WIPO (PCT)
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- flow sensor
- laser
- gate
- sensor according
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
- G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
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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
- 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
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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
- 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
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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
- 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
- B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
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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
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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
- B29C66/114—Single butt joints
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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
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
- B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
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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
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
- B29C66/244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being non-straight, e.g. forming non-closed contours
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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
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/322—Providing cavities in the joined article to collect the burr
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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
- B29C66/50—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
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
- B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
- B29C66/53462—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies joining substantially flat covers and substantially flat bottoms to open ends of container bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
- B29C66/7352—Thickness, e.g. very thin
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
- G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
- G01F1/6842—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow with means for influencing the fluid flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F5/00—Measuring a proportion of the volume flow
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
- B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
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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
- 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
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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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
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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
- B29C66/50—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/721—Fibre-reinforced materials
- B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
- B29C66/7315—Mechanical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—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
- B29C66/737—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 state of the material of the parts to be joined
- B29C66/7377—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
- B29C66/73775—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being crystalline
- B29C66/73776—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being crystalline the to-be-joined areas of both parts to be joined being crystalline
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- 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
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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
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
- B29C66/73941—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset characterised by the materials of both parts being thermosets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0079—Liquid crystals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0046—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements
Definitions
- the present invention relates to a flow sensor and a manufacturing method thereof.
- the present invention also relates to a joining structure between plastics using laser welding and a method therefor.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-67165 discloses a laser on the transmissive resin side as a method for laser welding a housing for housing a measuring element and a cover covering these in a measuring instrument such as a thermal flow meter. A method has been disclosed in which a concave portion is provided in the irradiation portion to shorten the transmission distance and efficiently weld. Further, Patent Document 2 (Japanese Patent Laid-Open No. 2009-056722) discloses a method for discriminating welding in a state where an opening is provided on the transmission resin side and the welded portion is bulged as an inspection method for the laser welded portion. Has been.
- the flow sensor includes a flow rate detection unit and a temperature detection unit, which are disposed on a housing (housing).
- Various electronic components are mounted in a circuit chamber provided in the housing, and the housing and the cover are required to be sealed in order to prevent a short circuit or corrosion of the wiring portion.
- the transmittance near the gate is as low as half or less of the transmittance of other parts, so it is necessary to adjust the laser power and control the speed.
- Patent Document 1 describes that the transmission distance is shortened.
- the laser irradiation part is in a concave state, and the use of a crystalline resin such as PBT with a large amount of scattering greatly affects the scattering.
- the heat input distribution of the laser becomes unstable, it has also been found that there arises a problem that the welding state becomes unstable especially at the end portion of the laser spot.
- the object of the present invention is to provide a cover-housing laser welding structure that achieves low productivity and high cost while improving the quality and reliability of the flow sensor without causing these new problems. Is to provide.
- the present application includes a plurality of means for solving the above problems.
- the flow sensor having a sub-passage part through which the fluid to be passed, at least a part of the cover that transmits the laser light in the vicinity of the gate part is thinner than the thickness of the other part that transmits the laser light.
- the adoption of the present invention can provide a flow sensor with high quality, high reliability, and low cost.
- FIG. 1 is an overall view of an internal combustion engine control system using a flow sensor of the present invention. It is a left view which shows the external appearance of a flow sensor. It is a front view which shows the external appearance of a flow sensor. It is a right view which shows the external appearance of a flow sensor. It is a rear view which shows the external appearance of a flow sensor. It is a left view of the housing of a flow sensor. It is a front view of the housing of a flow sensor. It is a right view of the housing of a flow sensor. It is a rear view of the housing of a flow sensor.
- FIG. 3 is a cross-sectional view of a welded portion shown in a direction perpendicular to the laser scanning direction in Example 1.
- Example 1 it is sectional drawing of the welding part shown from the direction along the laser scanning direction.
- Example 2 it is sectional drawing of the welding part shown from the direction perpendicular
- FIG. 9 is a front view of the housing of the flow sensor in Examples 3 and 4.
- FIG. 9 is a cross-sectional view showing a recess 501 from a direction perpendicular to a laser scanning direction in Example 3.
- FIG. 9 is a cross-sectional view showing a recess 501 from a direction perpendicular to a laser scanning direction in Example 3.
- Example 5 it is a front view of the housing of the flow sensor.
- Example 5 it is sectional drawing of the welding part which carried out the laser welding of the cover and the housing, and is the figure shown from the direction along a laser scanning direction.
- Example 6 it is a front view of the housing of the flow sensor.
- Example 7 it is a front view of the housing of the flow sensor.
- Example 8 it is a front view of the housing of the flow sensor.
- Example 9 it is a front view of the housing of the flow sensor.
- Air is inhaled based on the operation of the internal combustion engine 110 including the engine cylinder 112 and the engine piston 114, and this becomes the measurement target gas 30 measured by the thermal flow sensor 300 of the present invention.
- the suctioned fluid 30 to be measured passes through the air cleaner 122 and is guided to the combustion chamber of the engine cylinder 112 through the main passage 124, the throttle body 126, and the intake manifold 128.
- fuel is supplied from the fuel injection valve 152, and is introduced into the combustion chamber together with the measured gas 30 in the state of an air-fuel mixture.
- thermo flow sensor 300 of the present invention is not limited to this. It can also be used for a direct injection system in which fuel is directly injected into each combustion chamber.
- the fuel and air guided to the combustion chamber are in a mixed state of fuel and air, and are ignited explosively by the spark ignition of the spark plug 154 to generate mechanical energy.
- the combusted gas is guided from the exhaust valve 118 to the exhaust pipe, and exhausted as exhaust 24 from the exhaust pipe to the outside of the vehicle.
- the amount of intake air guided to the combustion chamber is controlled by a throttle valve 132 that is linked to an accelerator pedal.
- the fuel supply amount is controlled based on the intake air amount, and the driver controls the mechanical energy generated by the internal combustion engine by controlling the opening amount of the throttle valve 132 to control the intake air amount.
- the flow rate and temperature of the gas 30 to be measured taken from the air cleaner 122 and flowing through the main passage 124 are measured by the thermal flow sensor 300, and the measurement location is input to the control device 200.
- the output of the throttle angle sensor 144 that measures the opening of the throttle valve 132 is input to the control device 200, and the positions and states of the engine piston 114, the intake valve 116, and the exhaust valve 118 are input to the control device 200.
- the output of the rotation angle sensor 146 is input to the control device 200 in order to measure the rotation speed of the internal combustion engine.
- the output of the oxygen sensor 148 is input to the control device 200 in order to measure the state of the mixture ratio between the fuel amount and the air amount from the state of the exhaust 24.
- the control device 200 calculates the fuel injection amount and the ignition timing based on the intake air amount that is the output of the thermal flow sensor 300 and the rotational speed of the internal combustion engine. Based on the calculation result, the amount of fuel supplied from the fuel injection valve 152 and the ignition timing ignited by the spark plug 154 are controlled. The fuel supply amount and ignition timing are actually further based on the intake air temperature and throttle angle change state measured by the thermal flow sensor 300, the engine rotational speed change state, and the air-fuel ratio state measured by the oxygen sensor 148. It is finely controlled. The control device 200 further controls the amount of air that bypasses the throttle valve 132 by the idle air control valve 156 in the idle operation state of the internal combustion engine, thereby controlling the rotational speed of the internal combustion engine in the idle operation state.
- FIGS. 2A is a left side view of the thermal flow sensor 300
- FIG. 2B is a front view
- FIG. 3A is a right side view
- FIG. 3B is a rear view.
- the thermal flow sensor 300 includes a housing 302, a front cover 303, and a back cover 304.
- the housing 302 measures a flow rate and the like, a flange 312 for fixing the thermal flow sensor 300 to the main passage 124, an external connection part 305 having an external terminal for electrical connection with an external device, and the like.
- the measuring unit 310 is provided.
- a sub-passage groove for forming a sub-passage is provided inside the measurement unit 310, and further, the measurement unit 310 has a cover that flows through the main passage 124 as shown in FIGS.
- a circuit package 400 including a flow rate detection unit for measuring the flow rate of the measurement gas 30 and a temperature detection unit 452 for measuring the temperature of the measurement target gas 30 flowing through the main passage 124 is provided.
- FIG. 4A is a left side view of the housing of the flow sensor
- FIG. 4B is a front view
- FIG. 5A is a right side view of the housing of the flow sensor
- FIG. 5B is a rear view.
- a sub-passage groove 306 for forming a sub-passage is provided in the housing 302, a protrusion 307 disposed on the front and back surfaces of the housing 302 and in the vicinity of the sub-passage groove 306, and a front cover
- the sub-passage is completed by welding 303 and the back cover 304 with a laser.
- a part of the gas 30 to be measured flowing through the main passage 124 is taken into the sub-passage groove 306 on the back side from the inlet groove 351 forming the inlet 350 and flows in the sub-passage groove 306 on the back side.
- the sub-passage groove 306 on the back side has a shape that becomes deeper as it advances. As the gas flows along the groove, the gas 30 to be measured gradually moves in the direction of the front side.
- the sub-passage groove 306 on the back side is provided with a steeply inclined portion that becomes deeper and deeper at the upstream portion 342 of the circuit package 400, and a part of the air having a small mass moves along the steeply inclined portion.
- the upstream portion 342 flows through the measurement flow path surface 430 shown in FIG.
- a foreign substance having a large mass is difficult to change rapidly due to inertial force, and therefore moves toward the measurement channel surface rear surface 431 shown in FIG. Thereafter, it passes through the downstream portion 341 of the circuit package 400 and flows through the measurement channel surface 430 shown in FIG.
- the above is the description of the external structure and internal structure of the thermal flow sensor 300.
- Laser welding means that a portion of the light absorbing resin that is in contact with the light transmitting resin is melted by irradiating the laser through the light transmitting resin in a state where the light transmitting resin and the light absorbing resin are overlapped, and further from the light absorbing resin. In this method, the light-transmitting resin is melted and joined by the transmitted heat. Because of such a welding principle, it is desirable to use a natural material for the covers 303 and 304 used as the light transmitting resin without containing a colorant. On the other hand, it is desirable that the material of the housing 302 used as the light absorbing resin is blackened by containing carbon black.
- housing 302 and the covers 303 and 304 in the present invention include polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), nylon 6 (PA6), nylon 66 (PA66), which are crystalline resins having high heat resistance, Nylon 6T (PA6T) etc. are assumed.
- the thermal flow sensor 300 of the present invention since a particularly high dimensional accuracy and dimensional stability are required on the housing 302 side, a glass material of about 20-40% is often added. However, since the laser transmittance tends to deteriorate due to the addition of the glass material, the glass fiber addition ratio of the thermoplastic resin constituting the housing 302 is equivalent to the glass fiber addition ratio of the thermoplastic resin constituting the covers 303 and 304. Or more.
- the crystallinity of the thermoplastic resin constituting the housing 302 constitutes the covers 303 and 304. It is desirable to make it equal to or higher than the crystallinity of the thermoplastic resin.
- Lasers with wavelengths in the infrared region including semiconductor lasers, YAG lasers, and fiber lasers are effective in terms of cost, but lasers with other wavelengths are used depending on the absorption of the resin. May be.
- the intensity distribution of the laser light source can be changed to various intensity distributions depending on attached lenses such as Gaussian, top hat, and ring type, but the top hat and ring type can be welded more uniformly.
- the laser light source or the product may be physically moved on the stage and welded, or the laser light itself may be controlled and irradiated using a galvano mirror.
- the housing 302 is set at a predetermined position, and the covers 303 and 304 are arranged on the housing 302 with high accuracy. Thereafter, the covers 303 and 304 and the housing 302 are pressed with a transparent pressure material such as glass or acrylic resin. Laser welding is performed around the circuit chamber while maintaining the pressurized state, and further laser welding is performed so as to form a sub-passage.
- a transparent pressure material such as glass or acrylic resin.
- the transmittance near the gate is less than half that of the other parts, so adjustment of the laser power and speed reduction are necessary, and control becomes complicated and stable welding is difficult. It was. Further, since the transmittance is low in the vicinity of the gate, the welded state cannot be determined from the appearance in the inspection after welding.
- the material of the covers 303 and 304 of the thermal flow sensor 300 often uses a crystalline resin such as PBT, and glass. Since a material that reduces the transmittance, such as a fiber, is also included, it is difficult to increase the transmittance with the material itself.
- the gate As a result of optimizing the molding conditions in consideration of the melt viscosity and flow characteristics of the PBT resin, the gate The transmittance other than the portion was confirmed to be improved, but the gate portion remained low.
- the effect of improving the transmittance is small in the vicinity of the gate portion where the molten resin flows even when the temperature is lowered to 40 ° C. It has been found. As described above, these methods have a small effect for improving the transmittance in the vicinity of the gate portion.
- the resin temperature is high near the gate, so the crystallinity is high and the transmittance is low. It was proved that it was possible to secure the details and to fill the details. Further, it has been found that, due to the high degree of crystallinity, even if the thickness is slightly thin, basically no problem occurs in the strength itself. Therefore, when PBT resin is used as the cover material, molding is possible even if the thickness of the recess is made as thin as about 0.5 mm as long as it is only near the gate, and the thickness near the gate is made thinner than the thickness of other portions. Thus, it was found that the variation in transmittance can be greatly reduced while ensuring the strength.
- FIGS. 2 (B) and 3 (B) a flow rate sensor in which a recess 501 is provided near the gates of the covers 303 and 304, respectively, and the thickness of the covers 303 and 304 is made thinner than that of the other portions. Propose. This embodiment will be described with reference to FIG.
- FIG. 6 shows a cross-sectional view of the laser welding portion 390 of the concave portion 501 of the front cover 303.
- FIG. 6A is perpendicular to the welding line
- FIG. 6B is along the laser welding line. Shows direction.
- laser welding inspection methods include measurement by radiation temperature, measurement using optical interference, and inspection method by appearance. Appearance inspection is the most effective method for determining the quality of the welded state directly with a short tact. It is a simple method.
- a good welded portion 390 can be formed by setting the transmittance to 20% or more.
- the necessary region is visible light, and a transmittance that is significantly higher than the transmittance necessary for laser welding is required.
- the necessary wavelength region is often 450 nm to 750 nm.
- the transmittance is 30%, about 20% cannot be detected or large voids cannot be detected.
- the transmittance was 35% or more, the detection probability was 100%, and a large void could be observed.
- the transmittance of the portion corresponding to the welded portion 390 other than the gate portion of the covers 303 and 304 is also increased, it is difficult for the housing 302 to pass through the welded portion 390 and the covers 303 and 304, and the image inspection is difficult. There was a case. In such a case, the transmittance of the covers 303 and 304 in the vicinity of the welded portion 390 in the vicinity of the welded portion 390 is set to a thickness that is 20% or less at which the appearance observation of the welded portion 390 is completely impossible. Image inspection of the part 390 became easy.
- the ratio of the thicknesses of the covers 303 and 304 is set so that the transmittance difference between the cover 303 and 304 of the welded portion 390 and the portion other than the welded portion 390 is 15% or more, thereby improving the image quality.
- Appearance inspection becomes possible. In laser welding, it is only necessary to consider the transmittance of only the wavelength of the laser light source. However, in the appearance inspection, since it depends on the sensitivity of the CCD or the like, the transmittance of not only the wavelength region in the infrared region but also the visible light transmittance. High is desirable.
- the recesses 501 provided in the laser irradiation side covers 303 and 304 shown in FIGS. 6 and 7 need to be larger than the protrusions 307 formed on the housing 302 in order to realize stable welding.
- the protrusions 307 formed on the housing 302 are desirably provided at all locations on the welded portion 390.
- Example 2 of the present invention will be described with reference to FIG.
- the concave portion 501 is provided on the laser irradiation surface of the front cover 303, but also the concave portion 308 is provided on the surface of the front cover 303 that is joined to the housing 302.
- the gate structure is a side gate that is attached to the side surface of the product, in order to increase the flatness of the front cover 303, it is better to provide a gate position at any location in the longitudinal direction of the front cover 303. Therefore, the gate may be arranged not on the passage side but on the circuit chamber side near the flange 312. In that case, as shown in FIG. 8, a concave portion 501 may be provided in the front cover 303 on the circuit chamber side.
- Example 3 of the present invention will be described with reference to FIG.
- burrs are provided on the welded portion 390
- FIG. 9 is a cross-sectional view perpendicular to the weld line.
- the degree of crystallinity is high, so the strength is higher than that of the other welded portions, but the thickness of the front cover 303 is higher than that of the other welded portions 390. Therefore, if the thickness is made half or less, there may be a problem in strength.
- a tenth embodiment of the present invention will be described with reference to FIG.
- the characteristic variation of the thermal flow sensor 300 is increased. Therefore, in this embodiment, as shown in FIG. 10, a recess 308 provided on the side of the surface of the front cover 303 that is joined to the housing 302 is provided, and burrs are accommodated inside this.
- flash in a present Example may exist in the laser welding part 390 other than the part which formed the recessed part 501 of the laser irradiation surface, and also may exist in all the parts.
- the burr of this embodiment can be formed. As shown in FIG. 11, the strength can be improved by increasing the width of the laser welded portion 390 only in the portion corresponding to the concave portion 501 of the front cover 303.
- FIG. 12 is a cross-sectional view in the direction along the laser welding line of the laser welding portion 390 of the concave portion 501 of the front cover 303.
- the transmittance is greatly different between the concave portion 501 and the other laser irradiation portions.
- the transmittance difference can be gradually changed by setting the boundary between the concave portion 501 in the direction along the laser welding line and the other portion as an inclined portion.
- the laser irradiation surface can be a mirror surface, and the influence of the occurrence of the transmittance difference can be reduced even for the image inspection.
- the inclination angle is preferably 15 ° or less.
- FIG. 13 is a front view of the housing of the flow sensor 300.
- the gate structure is a side gate.
- the side gate requires a gate cut finishing operation, which requires an extra cost. Therefore, in this embodiment, the cost can be reduced by using a pin gate arranged on the top surface of the product.
- the gate structure is a pin gate, since the molten resin spreads radially, the region where the transmittance is low tends to be larger than when the side gate is used.
- the side gate is 5 mm from the gate position, while the pin gate is 7 to 9 mm from the gate position. In consideration of this point, in this embodiment, as shown in FIG.
- the gate position is provided in the central portion of the circuit chamber having a relatively isotropic shape, and the entire portion corresponding to the welded portion 390 of the circuit chamber is provided.
- a region where the thickness of the concave portion 501 of the front cover 303 is thin may be provided.
- the gate is automatically cut, but the remaining gate cut occurs. Therefore, it is desirable to reduce the thickness of the gate position in consideration of gate cut.
- FIG. 14 is a front view of the housing of the flow sensor 300. Since the resin flow at the time of molding deteriorates in the portion where the thickness is suddenly increased, such as the throttle portion of the front cover 303, the portion of the other circuit chamber is the common portion of the circuit chamber and the passage portion where the thickness is suddenly increased. There was a tendency for the transmittance to become worse. Therefore, in this embodiment, the second concave portion 502 is provided in the common portion of the circuit chamber and the passage portion of the front cover 303, and the thickness of the flat portion of the concave portion 502 is formed in the front cover 303 on the circuit chamber side other than that portion. It was made thinner than the thickness of the recess 501.
- FIG. 15 is a front view of the housing of the flow sensor 300.
- the gate position and the welded portion can be separated from each other, and thus may not be provided in the entire circuit chamber.
- a concave portion 501 may be provided on the laser irradiation surface of the front cover 303 only in a common portion between the circuit chamber and the passage portion.
- FIG. 16 is a front view of the housing of the flow sensor 300.
- the position of the pin gate is provided in the passage.
- the gate position is a side gate
- the gate position could be arranged at the inlet and outlet of the thermal flow sensor 300 as a position that can be relatively separated from the welded portion. Due to variations in the characteristics, variations in the characteristics themselves may occur.
- the gate position is a pin gate
- the gate cut portion 500 is only in the thickness direction of the front cover 303 and can be disposed at a position unrelated to the portion through which air flows. Therefore, in that case, the gate position is preferably arranged on the outer peripheral side on the passage side. The reason is that the dimensional accuracy of the front cover 303 is improved by allowing the resin to flow in the longitudinal direction as much as possible.
- the gate position is a pin gate
- the area where the thin flat portion of the concave portion 501 formed in the front cover 303 tends to increase. It is good to use it together and to increase the welding area.
- the laser welded portion 390 is formed by a line, but the sub-passage portion may not necessarily be welded at all.
- the recessed part 501 formed in the covers 303 and 304 should exist only in the part welded partly.
- the back cover 304 side has the same configuration.
- only one gate position has been described, there may be a plurality of gates. In this case, it is desirable that the recesses 501 formed in the covers 303 and 304 correspond to the number of gates.
- thermoplastic resin polystyrene (PS), acrylonitrile styrene (AS), acrylonitrile butadiene styrene copolymer (ABS), polyetherimide (PEI), polycarbonate (PC), polyarylate (PAR), Polymethylmethacrylate (PMMA), cycloolefin polymer (COP), cycloolefin copolymer (COC), polysulfone (PSF), polyethersulfone (PES), polyvinyl chloride (PVC), and polyvinylidene chloride (PVDC) Is mentioned.
- PS polystyrene
- AS acrylonitrile styrene
- ABS acrylonitrile butadiene styrene copolymer
- PEI polyetherimide
- PC polycarbonate
- PAR polyarylate
- PMMA Polymethylmethacrylate
- COP cycloolefin polymer
- COC cycloolefin cop
- polyethylene polyethylene
- PP polypropylene
- POM polyoxymethylene
- PET polyethylene terephthalate
- PTT polytrimethylene terephthalate
- PEN polyethylene naphthalate
- PEEK Polyether ether ketone
- LCP liquid crystal polymer
- PTFE polytetrafluoroethylene
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Abstract
Description
図4(A)は、流量センサのハウジングの左側面図であり、図4(B)は、正面図である。図5(A)は、流量センサのハウジングの右側面図であり、図5(B)は、背面図である。
図4において、ハウジング302に副通路を成形するための副通路溝306を設けており、カバーをハウジング302の表面及び裏面に配置し副通路溝306の近傍に配置した突起部307と、表カバー303と裏カバー304とをレーザにより溶着することで副通路が完成する。
ハウジングに形成した突起307よりもレーザ光550のスポットサイズを大きくすることで、本実施例のバリを形成することができる。図11のように、表カバー303の凹部501に対応する部分のみレーザ溶着部390の幅を大きくしておくことにより強度を向上させることができる。
30…被計測気体
110…内燃機関
112…エンジンシリンダ
114…エンジンピストン
116…吸入弁
118…排気弁
122…エアクリーナ
124…主通路
126…スロットルボディ
128…吸気マニホールド
132…スロットルバルブ
144…角度センサ
146…回転角度センサ
148…酸素センサ
152…燃料噴射弁
154…点火プラグ
156…アイドルエアコントロールバルブ
200…制御装置
300…熱式流量センサ
302…ハウジング
303…表カバー
304…裏カバー
305…外部接続部
306…副通路溝
307…レーザ溶着用の突起部
308…接合面の凹部
310…計測部
312…フランジ
315…熱絶縁部
317…上流側突起
318…下流側突起
320…端子接続部
322…保護部
324…突き出しピン
326…挿入孔
328…位置合わせ部
341…下流部
342…上流部
343…入口
350…入口
351…入口溝
353…出口溝
356…突起部
361…外部端子内端
380…突起部
381…突起部
382…空洞部
386…表側流路
387…裏側流路
390…レーザ溶着部
400…回路パッケージ
412…接続端子
430…計測用流路面
431…計測用流路面裏面
436…熱伝達面露出部
438…開口
452…温度検出部
500…ゲートカット部
501…レーザ照射面の凹部
502…レーザ照射面の第二の凹部
550…レーザ光
602…流量検出部
Claims (18)
- ハウジングと、カバーと、それらの間で封止され電子部品や配線部を内蔵する回路室と、検知対象となる流体が通過する副通路部とを備えた流量センサにおいて、
前記カバーのゲート部付近のうち、レーザー光により前記ハウジングとレーザ溶着された部分の一部の厚みが、他の部分の厚みよりも薄いことを特徴とする流量センサ。 - 請求項1記載の流量センサであって、
前記カバーのレーザ溶着された部分のレーザー透過率が、可視光のいずれかの波長において35%以上であることを特徴とする流量センサ。 - 請求項2記載の流量センサであって、
前記カバーのレーザ溶着されていない部分のレーザー透過率が、可視光のいずれかの波長において20%以下であることを特徴とする流量センサ。 - 請求項1及至3のいずれか記載の流量センサであって、
前記カバーは、レーザーが入射する側に凹部を備え、レーザ溶着された部分の前記凹部底面部の幅は、前記レーザ光のスポット径及びハウジングの突起幅よりも大きいことを特徴とする流量センサ。 - 請求項1及至4のいずれか記載の流量センサであって、
前記カバーは、溶着面側に凹部を備え、前記凹部底面部の幅は、レーザ光のスポット径及びハウジングの突起幅よりも大きいことを特徴とする流量センサ。 - 請求項1及至5のいずれか記載の流量センサであって、
少なくとも前記ゲート付近のレーザ溶着部にはバリが形成されていることを特徴とする流量センサ。 - 請求項6記載の流量センサであって、
前記ハウジングに形成した突起部の幅よりも、入射するレーザ光のスポットサイズが大きいことを特徴とする流量センサ。 - 請求項6又は7記載の流量センサであって、
少なくとも副通路部に形成した前記レーザ溶着部のバリは、カバーの凹部内に収納されていることを特徴とする流量センサ。 - 請求項1及至8のいずれか記載の流量センサであって、
前記カバーのゲート部付近のレーザ溶着部の溶着幅が、その他のレーザ溶着部の溶着幅よりも大きいことを特徴とする流量センサ。 - 請求項1及至9のいずれか記載の流量センサであって、
前記凹部の端に傾斜を設けたことを特徴とする流量センサ。 - 請求項1及至10のいずれか記載の流量センサであって、
前記カバーを形成するためのゲート構造をピンゲートとし、前記カバーのゲート位置を回路室中央付近に設けたことを特徴とする流量センサ。 - 請求項1及至10のいずれか記載の流量センサであって、
前記カバーを形成するためのゲート構造をピンゲートとし、前記カバーのゲート位置を副通路部の外周側近傍に設けたことを特徴とする流量センサ。 - 請求項1及至10のいずれか記載の流量センサであって、
前記カバーを形成するためのゲート構造をサイドゲートとし、前記カバーのゲート位置を副通路部の外周側に設けたことを特徴とする流量センサ。 - 請求項1及至10のいずれか記載の流量センサであって、
前記カバーを形成するためのゲート構造をサイドゲートとし、前記カバーのゲート位置をフランジ側に設けたことを特徴とする流量センサ。 - 請求項1及至14のいずれか記載の流量センサであって、
前記レーザ溶着部に相当するカバーの透過率に応じて、厚みが異なる部分が複数箇所あることを特徴とする流量センサ。 - 請求項1及至15のいずれか記載の流量センサであって、
前記カバー材のガラスファイバーの添加の割合が、前記ハウジング材のガラスファイバーの添加割合よりも小さいことを特徴とする流量センサ。 - 請求項1及至16のいずれか記載の流量センサであって、
前記カバー材の結晶化度が前記ハウジング材の結晶化度より小さいことを特徴とする流量センサ。 - 請求項1及至17のいずれか記載の流量センサであって、
前記カバーのゲート付近の弾性率は、前記カバーのその他の部分の弾性率よりも大きいことを特徴とする流量センサ。
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JP2018100947A (ja) * | 2016-12-22 | 2018-06-28 | 日立オートモティブシステムズ株式会社 | 熱式流量計およびその製造方法 |
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DE102017106622A1 (de) * | 2017-03-28 | 2018-10-04 | HELLA GmbH & Co. KGaA | Verfahren zur Verbindung von drei Bauteilen und verbindbares System zur Durchführung des Verfahrens |
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