EP4114647A1 - Installation pour localiser un traceur d'une preforme tissee - Google Patents
Installation pour localiser un traceur d'une preforme tisseeInfo
- Publication number
- EP4114647A1 EP4114647A1 EP21714251.2A EP21714251A EP4114647A1 EP 4114647 A1 EP4114647 A1 EP 4114647A1 EP 21714251 A EP21714251 A EP 21714251A EP 4114647 A1 EP4114647 A1 EP 4114647A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- preform
- installation
- camera
- mold
- fibers
- 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.)
- Pending
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/94—Investigating contamination, e.g. dust
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14172—Positioning or centering articles in the mould using light to define the position of the insert
-
- 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
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N2021/1765—Method using an image detector and processing of image signal
- G01N2021/177—Detector of the video camera type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8444—Fibrous material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8472—Investigation of composite materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8848—Polarisation of light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/062—LED's
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/063—Illuminating optical parts
- G01N2201/0634—Diffuse illumination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
- H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
- H04N23/632—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters
Definitions
- the present invention relates to the general field of parts made of composite material.
- a part made of composite material comprises a reinforcement (for example a fibrous reinforcement) and a matrix (for example a polymer resin).
- a so-called "weaving” operation consists of flat weaving a flat preform by means of a loom from strands of fibers (eg strands of carbon fibers).
- the preform is intended to form the reinforcement of the composite part.
- a so-called "cutting” operation consists of cutting the planar preform using a cutting mold.
- a so-called "forming” operation consists of forming the planar preform in three dimensions using a forming mold.
- a so-called “injection” operation consists of injecting the die into an injection mold in which the preform is located in three dimensions, so as to obtain the composite part.
- the weaving operation it is known to integrate at least one strand comprising fibers of a light-colored material (for example glass fibers) forming a tracer, and in other words a reference that can be used throughout the entire process. manufacturing process.
- a tracer comprising glass fibers
- the tracer is visually identifiable by the color white glass fibers.
- the preform comprises several markers.
- a plotter can for example be used to position the preform relative to a mold.
- the objective of the present invention is therefore to provide a simple, effective and economical solution making it possible to respond to the aforementioned problem.
- the invention thus proposes an installation for locating at least one strand comprising fibers of a first material of a preform woven from a piece of composite material, the preform comprising on the surface strands of fibers of a second material and minus the strand comprising fibers of the first material forming a tracer, the installation comprising a camera; characterized in that the installation further comprises:
- a light source emitting an incident unpolarized beam capable of being directed towards the preform
- polarizer having a first direction of polarization, the polarizer being able to polarize the unpolarized incident beam before interacting with the preform to obtain a polarized incident beam;
- the first material being selected from glass, aramid and alumina oxide; the second material being chosen from carbon and silicon carbide; the camera being able to film a reflected beam resulting from the interaction of the polarized incident beam with the preform, the reflected beam having previously passed through the cross analyzer, so as to locate the tracer of the preform.
- Such an installation makes it possible to easily locate the tracer of the preform from the images filmed by the camera, with the aim, for example, of positioning or checking the preform. Such an installation thus makes it possible to significantly reduce the number of defective preforms, and consequently of defective parts.
- the installation exploits the differences in optical properties between the first material and the second material, to highlight the fibers of the first material on the images filmed by the camera.
- the camera thus films only the light rays reflected by the fibers of the first material of the tracer.
- the installation according to the invention may include one or more of the following characteristics and / or steps, taken in isolation from each other or in combination with each other:
- the installation comprises a diffuser, the unpolarized incident beam passing through the diffuser before passing through the polarizer; - the installation includes a screen on which live images filmed by the camera are displayed;
- the installation includes a control device configured to automatically process images filmed by the camera;
- the light source comprises a plurality of light emitting diodes;
- the first material is glass or aramid
- the second material is carbon
- the present invention also relates to a method for positioning a preform woven from a piece of composite material relative to a mold, the preform comprising on the surface at least one strand comprising fibers of a first material forming a tracer and strands. fibers of a second material, by means of the installation as described above, the first material being chosen from glass, aramid and alumina oxide, the second material being chosen from carbon and carbide silicon, the method comprising a step consisting in: a) positioning the preform relative to the mold from the images filmed by the camera by positioning the tracer of the preform relative to a mark.
- the positioning method according to the invention may include one or more of the following characteristics and / or steps, taken in isolation from each other or in combination with each other:
- step a) is performed by an operator using a screen on which the images filmed by the camera are displayed live;
- the mark is formed by a slit opening into a cavity of the mold in which the preform is located, the unpolarized incident beam from the light source being directed towards the preform via the slit;
- the positioning method is implemented during a cutting operation of the preform in a cutting mold and / or a three-dimensional forming operation of the preform in a forming mold and / or an operation of injecting a die into an injection mold in which the preform is located.
- the present invention also relates to a method of checking a preform woven from a piece of composite material, the preform comprising on the surface at least one strand comprising fibers of a first material forming a tracer and strands of fibers of a second material, by means of the installation as described above, the first material being chosen from glass, aramid and alumina oxide, the second material being chosen from carbon and silicon carbide, the process comprising a step consisting in: a) checking that the tracer of the preform is within a predefined interval from the images filmed by the camera.
- control method according to the invention may include one or more of the following characteristics and / or steps, taken in isolation from each other or in combination with each other:
- step a) is carried out by a control device configured to automatically process the images filmed by the camera;
- control method is implemented during an operation of cutting the preform in a cutting mold and / or a three-dimensional forming operation of the preform in a forming mold and / or an injection operation of a die in an injection mold in which the preform is located.
- Figure 1 is a schematic view of an installation according to the invention
- FIG.2 Figure 2 is a perspective view of a blade preform
- Figure 3 is a perspective view of a mold for forming the blade preform illustrated in Figure 2;
- Figure 4 is a perspective view of a wedge attached to the mold shown in Figure 3;
- Figure 5 is a perspective view of a housing preform
- Figure 6 is a perspective view of a mold for forming the housing preform illustrated in Figure 5;
- Figure 7 is an image obtained by an installation according to the prior art
- Figure 8 is an image obtained by an installation according to the invention.
- Figure 1 is shown schematically an installation 1 for locating at least one strand 2 comprising fibers of a first material (forming a tracer) of a woven preform 3 of a composite material part.
- the composite material part is for example a part of an aircraft turbomachine, such as a fan blade or a fan casing.
- the composite material part comprises a reinforcement in the form of a woven fiber preform 3, 3a, 3b and an organic matrix such as a polymer resin.
- Such a part is manufactured according to a manufacturing process comprising various operations.
- a weaving operation involves flat weaving a flat preform using a loom from strands of fibers.
- the woven preform then comprises warp strands (in other words strands extending along the length of the preform) and weft strands (in other words strands extending along the width of the preform).
- the preform is for example woven by means of a Jacquard loom.
- the weaving of the preform is a three-dimensional weaving.
- a cutting operation consists of cutting the planar preform using a cutting mold.
- a forming operation involves three-dimensional forming the planar preform using a forming mold.
- the forming mold has an imprint the shape of which corresponds substantially to that of the part to be produced.
- an injection operation involves injecting the die (for example, a polymer resin) into an injection mold in which the three-dimensional preform is located.
- the die for example, a polymer resin
- the injection operation is obtained via a process known by the acronym RTM for "Resin Transfert Molding".
- RTM Resin Transfert Molding
- Such an RTM process uses an injection mold comprising two facing shells which are movable with respect to each other.
- the shells each comprise an imprint, the imprints defining a cavity in which the preform is placed and the matrix injected.
- the various operations of the manufacturing process are carried out in the order defined above.
- the various operations of the manufacturing process can be carried out manually and / or automatically.
- the preform 3, 3a, 3b comprises on the surface at least the strand 2 comprising fibers of a first material forming a tracer and strands 4 of fibers of a second material.
- a plotter corresponds to a reference (or a mark) that can be used throughout the part manufacturing process, for example in order to position or control the preform 3, 3a, 3b during an operation.
- the first material is chosen from glass, aramid and alumina oxide.
- the second material is chosen from carbon and silicon carbide.
- the fibers of the first material are light and the fibers of the second material are dark.
- the first material is glass and the second material is carbon.
- carbon fibers are black in color and the glass fibers are white in color.
- the first material is aramid and the second material is carbon.
- carbon fibers are black in color and aramid fibers are yellow in color.
- the first material is silicon carbide and the second material is aluminum oxide.
- silicon carbide fibers are black in color and alumina oxide fibers are yellowish-white in color.
- a tracer is located on the surface of the preform 3, 3a, 3b.
- a tracer can include two thirds of fibers of the first material and one third of fibers of the second material.
- a plotter can also include one hundred percent fibers of the first material.
- the preform 3, 3a, 3b can obviously include several markers.
- the plotter is integrated into the preform 3, 3a, 3b during the weaving operation.
- a tracer may be a warp strand (hereinafter referred to as a warp tracer or a longitudinal tracer) or a weft strand (hereinafter referred to as a weft tracer or a transverse tracer).
- the installation 1 for locating at least one tracer of the woven preform 3, 3a, 3b comprises:
- a light source 6 emitting an incident unpolarized beam f1 capable of being directed towards the preform 3, 3a, 3b;
- polarizer 7 having a first direction of polarization, the polarizer 7 being able to polarize the unpolarized incident beam f1 before interacting with the preform 3, 3a, 3b to obtain a polarized incident beam f2;
- a cross analyzer 8 having a second direction of polarization.
- the camera 5 is able to film a reflected beam f3 resulting from the interaction of the polarized incident beam f2 with the preform 3, 3a, 3b, the reflected beam f3 having previously passed through the cross analyzer 8, so as to locate the tracer of the preform 3, 3a, 3b.
- Such an installation 1 makes it possible to easily locate the tracer (s) of the preform.
- the tracer (s) appear distinctly on the images filmed by the camera 5.
- Installation 1 significantly accentuates the color of the fibers of the first material on the images filmed by the camera 5.
- the installation 1 exploits the differences in optical properties between the first material and the second material, to highlight the fibers of the first material on the images filmed by the camera 5.
- the second material exhibits a specular reflection while the first material exhibits diffuse reflection. Unlike diffuse reflection, specular reflection has the particularity of conserving polarization.
- the crossed analyzer 8 thus makes it possible to stop the light rays reflected by the fibers of the second material and to allow only the light rays reflected by the fibers of the first material of the tracer to pass, so as to make the fibers of the first material appear distinctly on the surface.
- the images filmed by the camera 5. the camera 5 films only the light rays reflected by the fibers of the first material of the tracer.
- the polarizer 7 has a first direction of polarization (or first direction of transmission), the polarizer 7 makes it possible to polarize the light rays of the beam indicating linearly (or rectilinearly) along the first direction of polarization.
- a polarizer 7 is called a “linear polarizer” or “rectilinear polarizer”.
- the crossed analyzer 8 has a second direction of polarization (or second direction of transmission), perpendicular or substantially perpendicular to the first direction of polarization of the polarizer 7, the analyzer 8 being as such crossed with the polarizer 7.
- the polarization directions are defined in a plane perpendicular to the beam propagation direction.
- the installation 1 comprises a diffuser (not shown), the unpolarized incident beam f1 passing through the diffuser before passing through the polarizer 7.
- a diffuser makes it possible to obtain uniform illumination.
- the installation 1 can include a screen 9 on which are displayed live images filmed by the camera 5. Such a screen 9 can for example allow an operator to locate the plotter, so as to position or control the preform.
- the installation 1 can include a control device configured to control the light source 6 and the camera 5.
- the control device can also be configured to control the screen 9.
- the control device can be configured to automatically process the images filmed by the camera 5.
- the control device can include, for example, a computer (or a computer processing system). information) and image processing software.
- the images filmed by the camera 5 are recorded with the aim of guaranteeing traceability of the preforms, and more generally of the parts made of composite material obtained by the manufacturing process.
- the camera 5 has a variable angle of view, the latter being adjusted so as to cover the desired field.
- the light source 6 comprises a plurality of light emitting diodes better known by the English acronym LED for "light emitting diode". Light-emitting diodes are, for example, in the form of an LED bar.
- the invention is also concerned with a method for positioning a woven preform 3, 3a, 3b relative to a mold 11 a, 11 b, the preform 3, 3a, 3b comprising at least one strand 2 on the surface comprising fibers of the first material forming a tracer and strands 4 of fibers of the second material, by means of the installation 1.
- the positioning method comprises a step a) consisting in positioning the preform 3, 3a, 3b relative to the mold 11a, 11b from the images filmed by the camera 5 by positioning the tracer of the preform 3, 3a, 3b relative to a mark.
- Step a) of the positioning process can be carried out by an operator using a screen 9 of the installation 1 on which the images filmed by the camera 5 are displayed live.
- Step a) of the positioning process can be carried out automatically using, in particular, an installation control device 1.
- the positioning method can be implemented throughout the manufacturing process of a part made of composite material, and in particular during the cutting operation and / or during the forming operation and / or during the cutting. injection operation.
- the invention is also interested in a method of checking a woven preform 3, 3a, 3b, the preform 3, 3a, 3b comprising at the surface at least one strand 2 comprising fibers of the first material forming a tracer and strands. 4 of fibers of the second material, by means of installation 1.
- the checking method comprises a step a) consisting in checking that the tracer of the preform 3, 3a, 3b is within a predefined interval from the images filmed by the camera 5.
- Step a) of the control process can be carried out by an operator using a screen 9 of the installation 1 on which the images filmed by the camera 5 are displayed live.
- Step a) of the control method can be carried out by a control device of the installation 1 configured to automatically process the images filmed by the camera 5.
- the control method can be implemented throughout the manufacturing process of a composite material part, and in particular during the cutting operation and / or during the forming operation and / or during the cutting. injection operation.
- Figures 2 to 4 show an operation for forming a preform of a fan blade 3a.
- FIG. 2 illustrates the planar blade preform 3a capable of being formed in three dimensions using a forming mold 11a illustrated in Figures 3 and 4.
- the blade preform 3a comprises a portion 13 capable of forming a blade root, ci -after referred to as the "part of foot 13".
- the blade preform 3a also comprises a part 14 capable of forming a blade blade, hereinafter referred to as the “blade part 14”.
- the blade preform 3a comprises a junction 15 between the root portion 13 and the blade portion 14, the junction 15 being able to form blade surfaces.
- the blade preform 3a comprises in particular on the surface a lower transverse marker 2a at the level of the junction 15.
- the forming mold 11a includes an indentation 16 to three-dimensionally form the vane preform 3a. More specifically, the footprint 16 comprises a section 17 capable of forming the foot portion 13 in three dimensions, hereinafter referred to as the "foot section 17". The cavity 16 also includes a section 18 capable of forming the blade portion 14 in three dimensions, hereinafter referred to as the "blade section 18". Finally, the footprint 16 comprises a section 19 capable of forming the junction 15 in three dimensions, hereinafter referred to as the "junction section 19".
- the forming mold 11a also comprises a slot 12 opening both on a lower face of the mold 11a and in the cavity 16. The slot 12 is located at the level of the junction section 19 and forms a mark used in particular for positioning. of the blade preform 3a relative to the mold 11a.
- the forming mold 11a further comprises a wedge 21 capable of being fixed on two projecting supports 22 bordering the indentation 16 at the level of the foot section 17.
- the wedge 21 makes it possible to immobilize the foot portion 13 by compression and the junction 15 of the blade preform 3a.
- the installation 1 comprises a screen 9 on which the images filmed by the camera 5 are displayed live.
- the incident beam f1 from the light source 6 is directed towards the screen.
- blade preform 3a placed in the cavity 16 via the slot 12 of the mold 11a.
- the positioning method described above is implemented to position the blade preform 3a relative to the forming mold 11a.
- an operator manually positions the lower transverse plotter 2a of the blade preform 3a in the slot 12 forming the mark, using the screen 9 of the installation 1 on which the filmed images are displayed live. by the camera 5. For this, using the screen 9, the operator moves the blade preform 3a on the mold 11a until the lower transverse marker 2a is included in the slot 12.
- the blade preform 3a is positioned relative to the forming mold 11a not only by positioning the lower transverse marker 2a in the slot 12 but also by making an upper transverse marker (not shown) of the blade preform coincide.
- 3a with a reference projected onto the mold 11a by one or more lasers.
- the upper transverse plotter is for example placed at the level of the junction 15.
- the reference projected by the laser (s) defines the theoretical position of the upper transverse plotter.
- control method described above is implemented to control the position of the blade preform 3a following its positioning, and in other words following the placement of the blade. the shim 21 on the two supports 22.
- the blade preform 3a is here shaped by an operator who spreads the preform 3a in the cavity 16 until the tracers upper longitudinal sections (not shown) of the preform 3a coincide with references projected onto the mold 11a by one or more lasers.
- the references projected by the laser (s) define the theoretical positions of each of the upper longitudinal tracers.
- Figure 5 illustrates the planar casing preform 3b capable of being formed in three dimensions using a forming mold 11b illustrated in Figure 6.
- the housing preform 3b is in the form of a rectangular sheet.
- the casing preform 3b comprises in particular on the surface at least one upper longitudinal marker 2b.
- the forming mold 11b comprises a cylindrical cavity 23 for forming in three dimensions the casing preform 3b.
- the mold 11b is movable in rotation about an axis of rotation X passing through the axis of revolution of the cylindrical cavity 23.
- the installation 1 comprises a control device 10 configured to automatically process the images filmed by the camera 5.
- the installation 1 further comprises a screen 9 on the screen. which are displayed live the images filmed by the camera 5.
- the incident beam f1 from the light source 6 is directed towards the casing preform 3b placed on the cavity 23.
- the casing preform 3b is here shaped by an operator who wraps the preform 3b around the imprint 23 by making the upper longitudinal marker 2b of the preform 3b coincide with a reference projected onto the mold 11b by a or more lasers.
- the reference projected by the laser (s) defines the theoretical position of the upper longitudinal tracer 2b.
- the control method described above is implemented to control the shaping of the casing preform 3b.
- the control device 10 automatically checks that the upper longitudinal marker 2b is indeed within a predefined interval. For this, the control device 10 compares the actual position of the upper longitudinal marker 2b and the predefined interval.
- the real position of the upper longitudinal plotter 2b is for example determined from the images filmed by the camera 5 and from image processing software.
- the terms “lower” and “upper” associated with the preforms 3a, 3b and with the molds 11a, 11b are defined with respect to the positions of the latter in the figures.
- FIG. 7 is an image filmed by a camera of an installation according to the prior art of a preform sample 3 comprising a longitudinal plotter and two transverse plotters.
- Figure 8 is an image filmed by a camera 5 of an installation 1 according to the invention of the same preform sample 3.
- the installation 1 according to the invention makes it possible to significantly accentuate the white color of the tracers, and thus to easily locate the tracers of the preform 3, for example in order to position or control the preform 3.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Moulding By Coating Moulds (AREA)
- Woven Fabrics (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2002177A FR3107854B1 (fr) | 2020-03-04 | 2020-03-04 | Installation pour localiser un traceur d’une preforme tissee |
| PCT/FR2021/050345 WO2021176171A1 (fr) | 2020-03-04 | 2021-03-01 | Installation pour localiser un traceur d'une preforme tissee |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4114647A1 true EP4114647A1 (fr) | 2023-01-11 |
Family
ID=71111552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21714251.2A Pending EP4114647A1 (fr) | 2020-03-04 | 2021-03-01 | Installation pour localiser un traceur d'une preforme tissee |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12287281B2 (fr) |
| EP (1) | EP4114647A1 (fr) |
| CN (1) | CN115151408A (fr) |
| FR (1) | FR3107854B1 (fr) |
| WO (1) | WO2021176171A1 (fr) |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2625850A (en) * | 1950-02-16 | 1953-01-20 | John S Stanton | Method and apparatus for assessing transient stresses within bodies |
| JP2005062165A (ja) * | 2003-07-28 | 2005-03-10 | Nitto Denko Corp | シート状製品の検査方法、検査システム、シート状製品、及び、画像表示装置 |
| JP4396160B2 (ja) * | 2003-07-31 | 2010-01-13 | 住友化学株式会社 | 透明性フィルムの異物検査方法 |
| US7356229B2 (en) * | 2005-02-28 | 2008-04-08 | 3M Innovative Properties Company | Reflective polarizers containing polymer fibers |
| US7559653B2 (en) * | 2005-12-14 | 2009-07-14 | Eastman Kodak Company | Stereoscopic display apparatus using LCD panel |
| KR100757378B1 (ko) * | 2006-04-16 | 2007-09-11 | 한양대학교 산학협력단 | Led를 이용한 현미경 타원해석기 |
| HU229699B1 (hu) * | 2007-05-23 | 2014-05-28 | Mta Termeszettudomanyi Kutatokoezpont Mta Ttk | Pinhole kamerát alkalmazó, leképzõ optikai vizsgálóberendezés (reflektométer, polariméter, ellipszométer) |
| DE102008018752A1 (de) * | 2008-04-14 | 2009-10-22 | Universität Bremen | Verfahren zur Herstellung von textilen Halbzeugstapeln und Preforms |
| US8339602B1 (en) * | 2008-09-15 | 2012-12-25 | J.A. Woollam Co., Inc. | View-finder in ellipsometer or the like systems |
| JP5489003B2 (ja) * | 2008-11-10 | 2014-05-14 | 株式会社ニコン | 評価装置および評価方法 |
| US8169612B2 (en) * | 2009-05-28 | 2012-05-01 | Koosur Technologies Inc. | System and method for performing ellipsometric measurements on an arbitrarily large or continuously moving sample |
| FR2985939B1 (fr) * | 2012-01-25 | 2014-02-14 | Snecma | Procede de fabrication d'une pale d'helice a structure composite, comprenant un ajustement de position entre deux parties |
| TWI490471B (zh) * | 2013-01-28 | 2015-07-01 | Univ Nat Taiwan | 非破壞性的複合材料檢測裝置及其檢測方法 |
| KR20150007719A (ko) * | 2013-07-12 | 2015-01-21 | 동우 화인켐 주식회사 | 편광판의 검사 방법 |
| KR20160146718A (ko) * | 2014-04-22 | 2016-12-21 | 바스프 에스이 | 적어도 하나의 물체를 광학적으로 검출하기 위한 검출기 |
| JP6342280B2 (ja) * | 2014-09-25 | 2018-06-13 | 関西熱化学株式会社 | 石炭における高輝度成分を識別する方法、装置及びコンピュータプログラム。 |
| NZ743790A (en) * | 2016-01-12 | 2023-01-27 | Magic Leap Inc | Beam angle sensor in virtual/augmented reality system |
| DE102016218390B3 (de) * | 2016-09-23 | 2018-02-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Messanordnung und Verfahren zum Messen von mechanischen Spannungen |
| US11458651B2 (en) * | 2019-02-15 | 2022-10-04 | Coats & Clark, Inc. | Pre-consolidation of thermoplastic fiber preforms and method of making the same |
| CN110285908B (zh) * | 2019-05-28 | 2022-04-01 | 北京机科国创轻量化科学研究院有限公司 | 一种复合材料预制体制造过程中多束纤维张力实时在线检测方法 |
-
2020
- 2020-03-04 FR FR2002177A patent/FR3107854B1/fr active Active
-
2021
- 2021-03-01 EP EP21714251.2A patent/EP4114647A1/fr active Pending
- 2021-03-01 US US17/908,020 patent/US12287281B2/en active Active
- 2021-03-01 WO PCT/FR2021/050345 patent/WO2021176171A1/fr not_active Ceased
- 2021-03-01 CN CN202180016437.2A patent/CN115151408A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20230085892A1 (en) | 2023-03-23 |
| FR3107854A1 (fr) | 2021-09-10 |
| CN115151408A (zh) | 2022-10-04 |
| US12287281B2 (en) | 2025-04-29 |
| FR3107854B1 (fr) | 2023-05-26 |
| WO2021176171A1 (fr) | 2021-09-10 |
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