EP4153407A1 - Structure for assembling a piece comprising a first metal part and a second part made of an organic matrix composite material - Google Patents

Structure for assembling a piece comprising a first metal part and a second part made of an organic matrix composite material

Info

Publication number
EP4153407A1
EP4153407A1 EP21731246.1A EP21731246A EP4153407A1 EP 4153407 A1 EP4153407 A1 EP 4153407A1 EP 21731246 A EP21731246 A EP 21731246A EP 4153407 A1 EP4153407 A1 EP 4153407A1
Authority
EP
European Patent Office
Prior art keywords
connection portion
hole
fixing element
blind hole
side wall
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
Application number
EP21731246.1A
Other languages
German (de)
French (fr)
Inventor
Alban Du Tertre
Didier Guichard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre National dEtudes Spatiales CNES
ArianeGroup SAS
Original Assignee
Centre National dEtudes Spatiales CNES
ArianeGroup SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centre National dEtudes Spatiales CNES, ArianeGroup SAS filed Critical Centre National dEtudes Spatiales CNES
Publication of EP4153407A1 publication Critical patent/EP4153407A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/008—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of engine cylinder parts or of piston parts other than piston rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
    • 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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/562—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using extra joining elements, i.e. which are not integral with the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
    • 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
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
    • F02K9/32—Constructional parts; Details not otherwise provided for
    • F02K9/34—Casings; Combustion chambers; Liners thereof
    • F02K9/346—Liners, e.g. inhibitors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
    • F02K9/60—Constructional parts; Details not otherwise provided for
    • F02K9/62—Combustion or thrust chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention relates to a piece comprising a first metal part (12) and a second part (14) made of an organic matrix composite material, in which the first part (12) has a first connecting portion (12A) and the second part (14) has a second connecting portion (14A), the second connecting portion (14A) having at least one through-hole (14B), the second connecting portion (14A) being totally or partially sandwiched between the first connecting portion (12A) and a metal fastening element (16), the fastening element (16) being fixed to the first part (12), on the one hand, on the first connecting portion (12D) via the through-hole (14B) of the second connecting portion (14A) and, on the other hand, on a portion (12D) other than the first connecting portion (12A), whereby the first part (12) and the second part (14) are fixed to one another.

Description

Structure d'assemblage d'une pièce comprenant une première partie métallique et une deuxième partie en matériau composite à matrice organique One-piece assembly structure comprising a first metal part and a second part made of composite material with an organic matrix
Domaine Technique Technical area
[0001] Le présent exposé concerne une pièce comprenant une partie métallique et une partie en matériau composite à matrice organique assemblées ensemble. Par exemple, une telle pièce peut être une enveloppe de chambre de combustion de moteur-fusée, mais pas uniquement. This disclosure relates to a part comprising a metal part and a part of composite material with an organic matrix assembled together. For example, such a part can be a rocket engine combustion chamber casing, but not exclusively.
Technique antérieure Prior art
[0002] On connaît des pièces comprenant une partie métallique et une partie en matériau composite à matrice organique assemblées ensemble. Toutefois, l’assemblage de ces deux parties est très souvent perfectible. Il existe donc un besoin en ce sens. [0002] Parts are known comprising a metal part and a part made of a composite material with an organic matrix assembled together. However, the assembly of these two parts can very often be improved. There is therefore a need in this direction.
Exposé de l’invention Disclosure of the invention
[0003] Un mode de réalisation concerne une pièce comprenant une première partie métallique et une deuxième partie en matériau composite à matrice organique, dans laquelle la première partie présente une première portion de raccord et la deuxième partie présente une deuxième portion de raccord, la deuxième portion de raccord présentant au moins un trou traversant, la deuxième portion raccord étant prise en sandwich en tout ou partie entre la première portion de raccord et un élément de fixation métallique, l’élément de fixation étant fixé à la première partie d’une part sur la première portion de raccord via le trou traversant de la deuxième portion de raccord et d’autre part sur une portion autre que la première portion de raccord, grâce à quoi la première partie et la deuxième partie sont fixées l’une à l’autre. [0003] One embodiment relates to a part comprising a first metal part and a second part made of composite material with an organic matrix, in which the first part has a first connection portion and the second part has a second connection portion, the second connection portion having at least one through hole, the second connection portion being sandwiched in whole or in part between the first connection portion and a metal fixing element, the fixing element being fixed to the first part on the one hand on the first connection portion via the through hole of the second connection portion and on the other hand on a portion other than the first connection portion, whereby the first part and the second part are fixed to each other. other.
[0004] On comprend que la portion de raccord d’une partie est la portion qui est en contact et coopère directement avec l’autre partie. Ainsi, une portion d’une partie qui ne coopère pas avec l’autre partie, par exemple qui n’est pas superposée avec, ou ne chevauche pas, la portion de raccord de l’autre partie, ne fait pas partie de la portion de raccord de ladite partie. It is understood that the connection portion of one part is the portion which is in contact and cooperates directly with the other part. Thus, a portion of a part which does not cooperate with the other part, for example which is not superimposed with, or does not overlap, the connection portion of the other part, does not form part of the connection portion of said part.
[0005] On comprend également que la deuxième portion de raccord présente un ou plusieurs trous traversant. Par la suite, et sauf indication contraire par « le trou traversant » on entend « le au moins un trou traversant ». It is also understood that the second connection portion has one or more through holes. Hereinafter, and unless otherwise indicated by "the through hole" is meant "the at least one through hole".
[0006] Par exemple l’élément de fixation est dans une nuance de métal identique à celle de la première partie, mais pas nécessairement. [0006] For example, the fastening element is in a metal shade identical to that of the first part, but not necessarily.
[0007] L’élément de fixation est fixé à la première partie en enserrant au moins une partie de la deuxième portion de raccord. Ainsi, la deuxième portion de raccord est bloquée entre la première portion de raccord et l’élément de fixation. [0007] The fixing element is fixed to the first part by enclosing at least part of the second connection portion. Thus, the second connection portion is blocked between the first connection portion and the fixing element.
[0008] L’élément de fixation est fixé à la première partie en deux endroits. L’élément de fixation est fixé à la première partie, et plus particulièrement à la première portion de raccord, en s’étendant au travers du trou traversant de la deuxième portion de raccord. L’élément de fixation est en outre fixé directement à la première partie sur une autre portion que la première portion de raccord. Ainsi il y a deux liaisons mécaniques entre l’élément de fixation et la première partie. Ceci permet d’assembler la première partie avec la deuxième partie. [0008] The fastener is attached to the first part in two places. The fastener is attached to the first part, and more particularly to the first connector portion, extending through the through hole of the second connector portion. The fastener is further attached directly to the first part on a portion other than the first connection portion. So there are two mechanical connections between the fastener and the first part. This assembles the first part with the second part.
[0009] Par rapport aux pièces connues de l’état de la technique, une telle structure d’assemblage permet de multiplier les zones de fixations et donc de mieux répartir les efforts mécaniques subis. Par ailleurs, en prenant en sandwich en tout ou partie la deuxième portion de raccord, la partie prise en sandwich de la deuxième portion de raccord entre la première partie et l’élément de fixation est parfaitement bloquée, notamment en flexion. Ceci a pour effet de rigidifier et de renforcer mécaniquement la structure d’assemblage selon le présent exposé par rapport pièces connues de l’état de la technique. Notamment, en réduisant des déformations en flexion au voisinage du trou traversant, on réduit les contraintes d’arrachage subies par la fixation entre l’élément de fixation et la première portion de raccord. [0009] Compared to parts known from the state of the art, such an assembly structure makes it possible to increase the number of fixing zones and therefore to better distribute the mechanical forces undergone. Furthermore, by sandwiching all or part of the second connection portion, the sandwiched part of the second connection portion between the first part and the fastening element is perfectly blocked, especially in bending. This has the effect of stiffening and mechanically strengthening the assembly structure according to the present disclosure compared to parts known from the state of the art. In particular, by reducing bending deformations in the vicinity of the through-hole, the pull-out stresses undergone by the attachment between the fastening element and the first connection portion are reduced.
[0010] Par exemple, les parties peuvent être des plaques, planes ou courbes, et les portions de fixation former des brides, planes ou courbes. [0011] Par exemple, la première partie et la deuxième partie forment chacune une plaque s’étendant selon une première direction et selon une deuxième direction, et présentant une épaisseur selon une troisième direction perpendiculaire à la première et à la deuxième direction, la première partie et la deuxième partie étant disposées côte à côte selon la première direction, le au moins un trou traversant s’étendant selon la troisième direction, la première et la deuxième portion de raccord se chevauchant l’une l’autre selon la première et la deuxième direction, l’élément de fixation et la première portion de raccord étant disposés de part et d’autre de la deuxième portion de raccord selon la troisième direction. La première et/ou la deuxième direction peuvent être rectilignes ou courbes, de manière similaire aux directions définies dans un repère cartésien, cylindrique ou sphérique. [0010] For example, the parts can be plates, flat or curved, and the fixing portions form flanges, flat or curved. For example, the first part and the second part each form a plate extending in a first direction and in a second direction, and having a thickness in a third direction perpendicular to the first and to the second direction, the first part and the second part being arranged side by side in the first direction, the at least one through-hole extending in the third direction, the first and the second connection portion overlapping each other in the first and the second direction. second direction, the fixing element and the first connection portion being arranged on either side of the second connection portion in the third direction. The first and / or the second direction can be rectilinear or curved, similar to the directions defined in a Cartesian, cylindrical or spherical coordinate system.
[0012] Dans certains modes de réalisation, la première portion de raccord présente au moins un trou borgne s’étendant respectivement dans le prolongement d’au moins un trou traversant de la deuxième portion de raccord, l’élément de fixation étant fixé à la première portion de raccord en s’étendant dans le trou borgne. In some embodiments, the first connection portion has at least one blind hole extending respectively in the extension of at least one through hole of the second connection portion, the fixing element being fixed to the first connection portion extending into the blind hole.
[0013] Par exemple, le trou borgne s’étend selon la troisième direction. On comprend qu’un trou borgne est un trou qui ne présente qu’un seul orifice et qui forme une concavité. [0013] For example, the blind hole extends in the third direction. We understand that a blind hole is a hole which has only one hole and which forms a concavity.
[0014] On comprend que l’élément de fixation est en prise avec la première partie, et plus précisément avec la première portion de raccord, dans le trou borgne. Ceci renforce liaison mécanique entre l’élément de fixation et la première partie, notamment en cisaillement (i.e. direction transverse à l’axe géométrique du trou borgne), mais également en traction (i.e. selon une direction parallèle à l’axe géométrique du trou borgne), en présentant une plus grande surface d’accroche. It is understood that the fixing element is engaged with the first part, and more precisely with the first connection portion, in the blind hole. This reinforces the mechanical link between the fixing element and the first part, in particular in shear (ie direction transverse to the geometric axis of the blind hole), but also in tension (ie in a direction parallel to the geometric axis of the blind hole ), by presenting a larger grip surface.
[0015] Dans certains modes de réalisation, le trou borgne présente une entrée, un fond, une paroi latérale s’étendant entre l’entrée et le fond et un axe géométrique, la paroi latérale du trou borgne étant inclinée par rapport à l’axe géométrique du trou traversant de manière à former un convergent depuis l’entrée vers le fond. In some embodiments, the blind hole has an entrance, a bottom, a side wall extending between the entrance and the bottom and a geometric axis, the side wall of the blind hole being inclined relative to the geometric axis of the through hole so as to form a convergent from the entrance to the bottom.
[0016] En d’autres termes, la paroi latérale du trou borgne présente au moins une portion inclinée par rapport à l’axe géométrique du trou borgne, et orientée de manière à être en regard de l’élément de fixation. Ceci permet d’augmenter la surface de fixation entre l’élément de fixation et la première portion de raccord, grâce à quoi la liaison mécanique est renforcée. Par ailleurs, une telle configuration est particulièrement adaptée lorsque l’élément de fixation est formé par fabrication additive par dépôt par projection de poudre métallique entraînée par un gaz froid. In other words, the side wall of the blind hole has at least one portion inclined relative to the geometric axis of the blind hole, and oriented so as to be facing the fixing element. This makes it possible to increase the fixing surface between the fixing element and the first connection portion, whereby the mechanical connection is reinforced. Moreover, such a configuration is particularly suitable when the fixing element is formed by additive manufacturing by deposition by spraying metal powder entrained by a cold gas.
[0017] Dans certains modes de réalisation, le trou traversant présente une paroi latérale et un axe géométrique, la paroi latérale du trou traversant étant inclinée par rapport à l’axe géométrique du trou traversant de manière à former un convergent depuis l’élément de fixation vers la première portion de raccord. In some embodiments, the through hole has a side wall and a geometric axis, the side wall of the through hole being inclined relative to the geometric axis of the through hole so as to form a convergent from the element of attachment to the first connection portion.
[0018] On comprend que l’axe géométrique du trou traversant est coaxial avec l’axe géométrique du trou borgne. On comprend également que la paroi latérale du trou traversant présente au moins une portion inclinée par rapport à l’axe géométrique du trou traversant, et orientée de manière à être en regard de l’élément de fixation. Par exemple, la paroi latérale du trou borgne s’étend dans le prolongement de la paroi latérale du trou traversant. It is understood that the geometric axis of the through hole is coaxial with the geometric axis of the blind hole. It is also understood that the side wall of the through-hole has at least one portion inclined relative to the geometric axis of the through-hole, and oriented so as to face the fixing element. For example, the side wall of the blind hole extends as an extension of the side wall of the through hole.
[0019] Ceci permet d’augmenter la surface de coopération entre l’élément de fixation et la deuxième portion de raccord, grâce à quoi la liaison mécanique est renforcée. Par ailleurs, une telle configuration est particulièrement adaptée lorsque l’élément de fixation est formé par fabrication additive par dépôt par projection de poudre métallique entraînée par un gaz froid. [0019] This makes it possible to increase the surface of cooperation between the fixing element and the second connection portion, whereby the mechanical connection is reinforced. Furthermore, such a configuration is particularly suitable when the fixing element is formed by additive manufacturing by deposition by spraying metal powder entrained by a cold gas.
[0020] Dans certains modes de réalisation, la première portion de raccord comprend un épaulement configuré pour coopérer avec la deuxième portion de raccord. In some embodiments, the first connection portion comprises a shoulder configured to cooperate with the second connection portion.
[0021] L’épaulement procure une surface supplémentaire de coopération entre la première et la deuxième partie, et renforce la solidité de l’assemblage. Par exemple, la première portion forme une marche définissant un épaulement. Par exemple, l’épaulement s’étend selon la deuxième et la troisième direction. [0021] The shoulder provides an additional surface for cooperation between the first and the second part, and reinforces the strength of the assembly. For example, the first portion forms a step defining a shoulder. For example, the shoulder extends in the second and third direction.
[0022] Dans certains modes de réalisation, l’élément de fixation est formé par fabrication additive par dépôt par projection de poudre métallique entraînée par un gaz froid, également connu sous l’acronyme CGS pour « Cold Gaz Spraying » en anglais. [0023] On comprend qu’une fabrication additive par dépôt par projection de poudre métallique entraînée par un gaz froid est un mode de fabrication additive où le métal est déposé à une température inférieure à sa température de fusion. Un tel mode de dépôt est particulièrement adapté à la pièce car on s’assure que la température du métal lors du dépôt reste inférieure à la température de détérioration du matériau composite à matrice organique de la deuxième partie. In some embodiments, the fastener is formed by additive manufacturing by deposition by spraying metal powder entrained by a cold gas, also known by the acronym CGS for "Cold Gas Spraying" in English. It is understood that additive manufacturing by deposition by spraying metal powder entrained by a cold gas is an additive manufacturing method where the metal is deposited at a temperature below its melting point. Such a deposition method is particularly suitable for the part because it is ensured that the temperature of the metal during the deposition remains below the deterioration temperature of the composite material with an organic matrix of the second part.
[0024] Un tel élément de fixation est particulièrement aisé à fabriquer, permet de s’affranchir des étapes de soudure ou de boulonnage de l’état de de la technique, et présente ainsi une masse relativement réduite. [0024] Such a fastening element is particularly easy to manufacture, makes it possible to dispense with the welding or bolting steps of the prior art, and thus has a relatively small mass.
[0025] Dans certains modes de réalisation, une couche de protection est disposée entre l’élément de fixation et la deuxième portion de raccord. [0025] In some embodiments, a protective layer is disposed between the fastening element and the second connection portion.
[0026] Une telle couche de protection permet de protéger la deuxième portion de raccord, par exemple lorsque l’élément de fixation est formé par dépôt par projection de poudre métallique entraînée par un gaz froid. Ceci permet d’assurer l’intégrité mécanique de la deuxième portion de raccord, et donc d’assurer la tenue mécanique de l’assemblage. Par exemple, la couche de protection peut s’étendre sur toute l’interface entre la deuxième partie et l’élément de fixation. Such a protective layer makes it possible to protect the second connection portion, for example when the fixing element is formed by depositing by spraying metal powder entrained by a cold gas. This ensures the mechanical integrity of the second connection portion, and therefore ensures the mechanical strength of the assembly. For example, the protective layer can extend over the entire interface between the second part and the fastener.
[0027] Dans certains modes de réalisation, la pièce présente une forme générale à symétrie de révolution. In some embodiments, the part has a general shape with symmetry of revolution.
[0028] La structure d’assemblage selon le présent exposé est particulièrement bien adaptée à des pièces annulaires. The assembly structure according to the present disclosure is particularly well suited to annular parts.
[0029] Dans certains modes de réalisation, la pièce forme une enveloppe de chambre de combustion de moteur-fusée. In some embodiments, the part forms a rocket engine combustion chamber envelope.
[0030] La structure d’assemblage selon le présent exposé est particulièrement bien adaptée pour une enveloppe de chambre de combustion de moteur-fusée. The assembly structure according to the present disclosure is particularly well suited for a rocket engine combustion chamber shell.
[0031] Un mode de réalisation concerne également un moteur-fusée comprenant une pièce selon l’un quelconque des modes de réalisation décrits dans le présent exposé, et notamment une enveloppe de chambre de combustion selon l’un quelconque des modes de réalisation décrits dans le présent exposé. Brève description des dessins One embodiment also relates to a rocket engine comprising a part according to any one of the embodiments described in the present description, and in particular a combustion chamber casing according to any one of the embodiments described in this presentation. Brief description of the drawings
[0032] L’objet du présent exposé et ses avantages seront mieux compris à la lecture de la description détaillée faite ci-après de différents modes de réalisation donnés à titre d’exemples non limitatifs. Cette description fait référence aux pages de figures annexées, sur lesquelles : The object of this presentation and its advantages will be better understood on reading the detailed description given below of various embodiments given by way of non-limiting examples. This description refers to the pages of appended figures, on which:
[0033] [Fig. 1] La figure 1 représente un moteur-fusée, [0033] [Fig. 1] Figure 1 shows a rocket engine,
[0034] [Fig. 2] La figure 2 représente l'enveloppe de la chambre de combustion du moteur-fusée de la figure 1, et [0034] [Fig. 2] Figure 2 shows the envelope of the combustion chamber of the rocket engine of Figure 1, and
[0035] [Fig. 3] La figure 3 représente la structure d'assemblage entre une partie métallique et une partie en matériau composite à matrice organique de l'enveloppe de la chambre de combustion de la figure 2. [0035] [Fig. 3] FIG. 3 represents the assembly structure between a metallic part and a part made of composite material with an organic matrix of the envelope of the combustion chamber of FIG. 2.
Description des modes de réalisation Description of the embodiments
[0036] Pour la clarté du présent exposé, on note que les vues des figures 1 à 3 sont très schématiques. La figure 1 représente un moteur-fusée 100 comprenant une enveloppe de chambre de combustion 10 débouchant sur une tuyère d’éjection 20. La figure 2 représente l’enveloppe de chambre de combustion 10, comprenant une première partie métallique 12, une deuxième partie en matériau composite à matrice organique 14 et une pluralité d’éléments de fixation 16 pour fixer la première partie 12 avec la deuxième partie 14. Dans cet exemple, l’enveloppe de chambre de combustion 10 et une pièce présentant une forme générale à symétrie de révolution d’axe X, la première partie 12 et la deuxième partie 14 ayant chacune sensiblement une forme générale de plaques annulaires. De manière générale, dans cet exemple la direction axiale correspond à la direction de l’axe géométrique X de la pièce 10, et une direction radiale R est une direction perpendiculaire à l’axe X. La direction azimutale ou circonférentielle C correspond à la direction décrivant un anneau autour de la direction axiale X. Les trois directions axiale, radiale et azimutale correspondent respectivement aux directions définies par la côte, le rayon et l’angle dans un système de coordonnées cylindrique. [0037] Les première et deuxième parties 12 et 14 forment des plaques s’étendant selon une première direction DA (dans cet exemple la première direction est inclinée par rapport à la direction axiale X) et selon une deuxième direction DB (dans cet exemple la deuxième direction DB étant parallèle à la direction circonférentielle C), et présentent une épaisseur selon une troisième direction DC, perpendiculaire à la première et à la deuxième direction DA et DB. Dans cet exemple, le repère DA, DB et DC forme un repère local dans le repère X, C, R. For the clarity of this presentation, it is noted that the views of Figures 1 to 3 are very schematic. FIG. 1 represents a rocket engine 100 comprising a combustion chamber casing 10 opening onto an ejection nozzle 20. FIG. 2 represents the combustion chamber casing 10, comprising a first metal part 12, a second metal part. composite material with an organic matrix 14 and a plurality of fixing elements 16 for fixing the first part 12 with the second part 14. In this example, the combustion chamber casing 10 and a part having a general shape with symmetry of revolution of axis X, the first part 12 and the second part 14 each having substantially the general shape of annular plates. In general, in this example, the axial direction corresponds to the direction of the geometric axis X of the part 10, and a radial direction R is a direction perpendicular to the axis X. The azimuthal or circumferential direction C corresponds to the direction describing a ring around the axial direction X. The three directions axial, radial and azimuthal correspond respectively to the directions defined by the coast, the radius and the angle in a cylindrical coordinate system. The first and second parts 12 and 14 form plates extending in a first direction DA (in this example the first direction is inclined relative to the axial direction X) and in a second direction DB (in this example the second direction DB being parallel to the circumferential direction C), and have a thickness in a third direction DC, perpendicular to the first and to the second direction DA and DB. In this example, the DA, DB and DC coordinate system forms a local coordinate system in the X, C, R coordinate system.
[0038] Dans cet exemple, la première partie 12 est en alliage métallique par exemple en alliage à base de nickel, la deuxième partie 14 est en matériau composite à matrice organique, par exemple de type thermoplastique ou thermodurcissable et les éléments de fixation 16 sont en alliage métallique de type acier ou à base de nickel. D’autres matériaux sont envisageables. Selon une variante, la pluralité d’éléments de fixation 16 est remplacée par une unique bride annulaire. In this example, the first part 12 is made of a metal alloy, for example a nickel-based alloy, the second part 14 is made of a composite material with an organic matrix, for example of the thermoplastic or thermosetting type and the fixing elements 16 are made of a steel-type or nickel-based metal alloy. Other materials are possible. According to a variant, the plurality of fixing elements 16 is replaced by a single annular flange.
[0039] La figure 3 représente une vue en coupe selon le plan III de la figure 2 de la structure d’assemblage de la première partie 12 avec la deuxième partie 14 à l’aide d’un élément fixation 16. Bien entendu, la description ci-après s’applique à toutes les fixations comprenant un élément de fixation 16. Figure 3 shows a sectional view along the plane III of Figure 2 of the assembly structure of the first part 12 with the second part 14 using a fixing element 16. Of course, the The following description applies to all fasteners comprising a fastening element 16.
[0040] La première partie 12 comprend une première portion de raccord 12A présentant un trou borgne 12B et un épaulement 12C. Le trou borgne 12B présente un axe géométrique Atb qui s’étend selon la troisième direction DC entre une entrée 12B1 et un fond 12B2, et présente une paroi latérale 12B3 s’étendant entre l’entrée 12B1 et le fond 12B2. Dans cet exemple, le trou borgne 12B est de forme tronconique, la paroi latérale 12B3 étant uniformément inclinée par rapport à l’axe Atb, en formant un convergent depuis l’entrée 12B1 vers le fond 12B2. Bien entendu, toute autre forme de trou borgne est envisageable. L’épaulement 12C s’étend transversalement à la première direction DA. En d’autres termes, dans cet exemple, l’épaulement 12C s’étend selon la deuxième direction DB et la troisième direction DC. La première portion de raccord 12A forme ainsi une marche recevant une deuxième portion de raccord 14A décrite ci-après de la deuxième partie 14, la deuxième partie 14 coopérant en butée selon la direction axiale X (et selon la première direction DA) avec l’épaulement 12C. La première partie 12 et la deuxième partie 14 sont disposées côte à côte selon la première direction DA. [0041] La deuxième partie 14 présente une deuxième portion de raccord 14A présentant un trou traversant 14B. Le trou traversant 14B présente un axe géométrique Att, confondu avec l’axe géométrique Atb du trou borgne 12B, qui s’étend selon la troisième direction DC, et présente une paroi latérale 14B3. Dans cet exemple, le trou traversant 14B est de forme tronconique, la paroi latérale 14B3 étant uniformément inclinée par rapport à l’axe Att, en formant un convergent depuis l’élément de fixation 16 vers la première portion de raccord 12A. Bien entendu, toute autre forme de trou traversant est envisageable. Selon une variante, la deuxième portion de raccord 14A présente deux trous traversant, ou plus, et la première portion de raccord 12A comprend autant de trous borgnes, ou moins. The first part 12 comprises a first connection portion 12A having a blind hole 12B and a shoulder 12C. The blind hole 12B has a geometric axis Atb which extends in the third direction DC between an inlet 12B1 and a bottom 12B2, and has a side wall 12B3 extending between the inlet 12B1 and the bottom 12B2. In this example, the blind hole 12B is of frustoconical shape, the side wall 12B3 being uniformly inclined with respect to the axis Atb, forming a convergent from the inlet 12B1 towards the bottom 12B2. Of course, any other form of blind hole is possible. The shoulder 12C extends transversely to the first direction DA. In other words, in this example, the shoulder 12C extends in the second direction DB and the third direction DC. The first connection portion 12A thus forms a step receiving a second connection portion 14A described below from the second part 14, the second part 14 cooperating in abutment in the axial direction X (and in the first direction DA) with the shoulder 12C. The first part 12 and the second part 14 are arranged side by side in the first direction DA. The second part 14 has a second connection portion 14A having a through hole 14B. The through hole 14B has a geometric axis Att, coincident with the geometric axis Atb of the blind hole 12B, which extends in the third direction DC, and has a side wall 14B3. In this example, the through hole 14B is frustoconical in shape, the side wall 14B3 being uniformly inclined with respect to the axis Att, forming a convergent from the fixing element 16 towards the first connection portion 12A. Of course, any other form of through hole is possible. According to a variant, the second connection portion 14A has two or more through holes, and the first connection portion 12A comprises as many blind holes, or less.
[0042] Dans cet exemple, une couche de protection 18 est disposée entre l’élément de fixation 16 et la deuxième portion de raccord14A. Plus particulièrement dans cet exemple, la couche de protection 18 s’étend sur toute l’interface de la deuxième partie 14 avec la pièce de fixation 16. En d’autres termes, dans cet exemple la couche de protection 18 s’étend non seulement sur la paroi latérale 14B3 du trou traversant 14B mais également sur les parois de la deuxième partie 14 en regard avec l’élément de fixation 16. In this example, a protective layer 18 is disposed between the fastening element 16 and the second portion of connector 14A. More particularly in this example, the protective layer 18 extends over the entire interface of the second part 14 with the fastener 16. In other words, in this example the protective layer 18 extends not only on the side wall 14B3 of the through hole 14B but also on the walls of the second part 14 facing the fixing element 16.
[0043] Par exemple, cette couche de protection 18 est formée par une feuille métallique, ou par un dépôt métallique du type fabrication additive par dépôt métallique arc-fil ou « métal arc wire » en anglais. Par exemple, la couche de protection 18 est jointe au fond 12B2 du trou borgne 12B, et ce de manière étanche, par exemple avec un joint en cuivre. For example, this protective layer 18 is formed by a metal foil, or by a metal deposit of the additive manufacturing type by metal arc-wire deposit or "metal arc wire" in English. For example, the protective layer 18 is joined to the bottom 12B2 of the blind hole 12B, and this in a sealed manner, for example with a copper gasket.
[0044] Dans cet exemple, l’élément de fixation 16 et formé par fabrication additive par dépôt par projection de poudre métallique entraînée par un gaz froid. La couche de protection 18 étant fixée de manière étanche sur le fond 12B2, ceci permet d’éviter toute fuite de matière lors de la projection de matière pour la formation de l’élément de fixation 16, ce qui améliore la qualité et la fixation et donc sa tenue mécanique. In this example, the fastener 16 and formed by additive manufacturing by deposition by spraying metal powder entrained by a cold gas. The protective layer 18 being fixed in a sealed manner on the bottom 12B2, this makes it possible to avoid any material leakage during the projection of material for the formation of the fixing element 16, which improves the quality and the fixing and therefore its mechanical strength.
[0045] L’élément de fixation 16 enserre, avec la première partie 12, une portion de la deuxième portion de raccord 14A, selon la première direction DA. L’élément de fixation 16 est fixé à la première portion de raccord 12A, dans le trou borgne 12B en s’étendant au travers du trou traversant 14B de la deuxième portion de raccord 14A. L’élément de fixation 16 est également fixé à la première partie 12 sur une portion distincte de la première portion de raccord 12A, dans cet exemple une portion 12D adjacente à la première portion de raccord 12A. En d’autres termes, l’élément de fixation 16 forme un « pont » de fixation entre la première portion de raccord 12A et la portion adjacente 12D, en prenant en sandwich, avec la première partie 12, une partie de la deuxième portion de raccord 14A. The fixing element 16 encloses, with the first part 12, a portion of the second connection portion 14A, in the first direction DA. The fixing element 16 is fixed to the first connection portion 12A, in the blind hole 12B extending through the through hole 14B of the second connector portion 14A. The fixing element 16 is also fixed to the first part 12 on a separate portion of the first connector portion 12A, in this example a portion 12D adjacent to the first connector portion 12A. In other words, the fixing element 16 forms a fixing "bridge" between the first connection portion 12A and the adjacent portion 12D, by sandwiching, with the first part 12, a part of the second portion of the connection. 14A connection.
[0046] Par exemple, la surface Si2D de contact entre la portion 12D et la première partie 12 est supérieure ou égale à la surface S12B2 du fond 12B2 du trou borgne 12B (i.e. S-|2D ³ S-I2B2). For example, the Si 2D contact surface between the portion 12D and the first part 12 is greater than or equal to the surface S 12 B2 of the bottom 12B2 of the blind hole 12B (ie S- | 2 D ³ SI 2 B 2 ).
[0047] Un tel élément de fixation 16 fixé sur deux portions de la première partie 12 permet de bloquer la partie enserrée de la deuxième portion de raccord 14A et de rigidifier l’ensemble, ce qui réduit notamment les déformations en flexion F (autour de la direction circonférentielle C) de l’ensemble. Les points de fixations sont donc moins sollicités et leur tenue mécanique renforcée. Dans le cas d’un élément de fixation formant une bride annulaire s’étendant sur toute la direction circonférentielle C, les déformations en flexion autour de la direction axiale X de l’ensemble sont également réduites. Such a fastening element 16 fixed to two portions of the first part 12 makes it possible to block the clamped part of the second connection portion 14A and to stiffen the assembly, which in particular reduces the bending deformations F (around the circumferential direction C) of the assembly. The fixing points are therefore less stressed and their mechanical strength is reinforced. In the case of a fastener forming an annular flange extending over the entire circumferential direction C, the bending deformations around the axial direction X of the assembly are also reduced.
[0048] Par ailleurs, la fixation de l’élément de fixation 16 sur deux portions de la première partie 12 permet de mieux répartir les efforts de cisaillement (i.e. efforts orientés transversalement à la direction radiale R ou dans le plan défini par les directions axiale X et circonférentielle C). Enfin, la résistance à l’arrachage, selon la direction radiale R est également améliorée. Furthermore, the fixing of the fixing element 16 on two portions of the first part 12 makes it possible to better distribute the shear forces (ie forces oriented transversely to the radial direction R or in the plane defined by the axial directions X and circumferential C). Finally, the resistance to tearing, in the radial direction R is also improved.
[0049] Bien que la présente invention ait été décrite en se référant à des modes de réalisation spécifiques, il est évident que des modifications et des changements peuvent être effectués sur ces exemples sans sortir de la portée générale de l'invention telle que définie par les revendications. En particulier, des caractéristiques individuelles des différents modes de réalisation illustrés/mentionnés peuvent être combinées dans des modes de réalisation additionnels. Par conséquent, la description et les dessins doivent être considérés dans un sens illustratif plutôt que restrictif. [0050] Il est également évident que toutes les caractéristiques décrites en référence à un procédé sont transposables, seules ou en combinaison, à un dispositif, et inversement, toutes les caractéristiques décrites en référence à un dispositif sont transposables, seules ou en combinaison, à un procédé. Although the present invention has been described with reference to specific embodiments, it is obvious that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the revendications. In particular, individual characteristics of the different illustrated / mentioned embodiments can be combined in additional embodiments. Therefore, the description and the drawings should be taken in an illustrative rather than a restrictive sense. It is also obvious that all the characteristics described with reference to a method can be transposed, alone or in combination, to a device, and conversely, all the characteristics described with reference to a device can be transposed, alone or in combination, to a method.

Claims

Revendications Claims
[Revendication 1] Pièce comprenant une première partie (12) métallique et une deuxième partie (14) en matériau composite à matrice organique, dans laquelle la première partie (12) présente une première portion de raccord (12A) et la deuxième partie (14) présente une deuxième portion de raccord (14A), la deuxième portion de raccord (14A) présentant au moins un trou traversant (14B), la deuxième portion raccord (14A) étant prise en sandwich en tout ou partie entre la première portion de raccord (12A) et un élément de fixation (16) métallique, l'élément de fixation (16) étant fixé à la première partie (12) d'une part sur la première portion de raccord (12A) via le trou traversant (14B) de la deuxième portion de raccord (14A) et d'autre part sur une portion (12D) autre que la première portion de raccord (12A), grâce à quoi la première partie (12) et la deuxième partie (14) sont fixées l'une à l'autre. [Claim 1] Part comprising a first metallic part (12) and a second part (14) made of a composite material with an organic matrix, in which the first part (12) has a first connection portion (12A) and the second part (14) ) has a second connection portion (14A), the second connection portion (14A) having at least one through hole (14B), the second connection portion (14A) being sandwiched in whole or in part between the first connection portion (12A) and a metal fixing element (16), the fixing element (16) being fixed to the first part (12) on the one hand on the first connection portion (12A) via the through hole (14B) of the second connection portion (14A) and on the other hand on a portion (12D) other than the first connection portion (12A), whereby the first part (12) and the second part (14) are fixed therein. to one another.
[Revendication 2] Pièce selon la revendication 1, dans laquelle la première portion de raccord (12A) présente au moins un trou borgne (12B) s'étendant respectivement dans le prolongement d'au moins un trou traversant (14B) de la deuxième portion de raccord (14A), l'élément de fixation (16) étant fixé à la première portion de raccord (12A) en s'étendant dans le trou borgne (12B). [Claim 2] Part according to claim 1, in which the first connection portion (12A) has at least one blind hole (12B) extending respectively in the extension of at least one through hole (14B) of the second portion connector (14A), the fastener (16) being fixed to the first connector portion (12A) by extending into the blind hole (12B).
[Revendication 3] Pièce selon la revendication 2, dans laquelle le trou borgne (12B) présente une entrée (12B1), un fond (12B2), une paroi latérale (12B3) s'étendant entre l'entrée (12B1) et le fond (12B2) et un axe géométrique (Atb), la paroi latérale (12B3) du trou borgne (12B) étant inclinée par rapport à l'axe géométrique (Atb) du trou borgne de manière à former un convergent depuis l'entrée (12B1) vers le fond (12B2). [Claim 3] Part according to claim 2, wherein the blind hole (12B) has an entrance (12B1), a bottom (12B2), a side wall (12B3) extending between the entrance (12B1) and the bottom (12B2) and a geometric axis (Atb), the side wall (12B3) of the blind hole (12B) being inclined with respect to the geometric axis (Atb) of the blind hole so as to form a convergent from the entrance (12B1 ) towards the bottom (12B2).
[Revendication 4] Pièce selon l'une quelconque des revendications 1 à 3, dans laquelle le trou traversant (14B) présente une paroi latérale (14B3) et un axe géométrique (Att), la paroi latérale (14B3) du trou traversant (14B) étant inclinée par rapport à l'axe géométrique (Att) du trou traversant (14B) de manière à former un convergent depuis l'élément de fixation (16) vers la première portion de raccord (12A). [Claim 4] Part according to any one of claims 1 to 3, wherein the through hole (14B) has a side wall (14B3) and a geometric axis (Att), the side wall (14B3) of the through hole (14B) ) being inclined with respect to the geometric axis (Att) of the through hole (14B) of so as to form a convergent from the fastener (16) to the first connector portion (12A).
[Revendication 5] Pièce selon l'une quelconque des revendications 1 à 4, dans laquelle la première portion de raccord (12A) comprend un épaulement (12C) configuré pour coopérer avec la deuxième portion de raccord (14A).[Claim 5] Part according to any one of claims 1 to 4, wherein the first connection portion (12A) comprises a shoulder (12C) configured to cooperate with the second connection portion (14A).
[Revendication 6] Pièce selon l'une quelconque des revendications 1 à 5, dans laquelle l'élément de fixation (16) est formé par fabrication additive par dépôt par projection de poudre métallique entraînée par un gaz froid. [Claim 6] Part according to any one of claims 1 to 5, in which the fixing element (16) is formed by additive manufacturing by deposition by projection of metal powder entrained by a cold gas.
[Revendication 7] Pièce selon l'une quelconque des revendications 1 à 6, dans laquelle une couche de protection (18) est disposée entre l'élément de fixation (16) et la deuxième portion de raccord (14A). [Claim 7] Part according to any one of claims 1 to 6, in which a protective layer (18) is disposed between the fixing element (16) and the second connection portion (14A).
[Revendication 8] Pièce selon l'une quelconque des revendications 1 à 6, présentant une forme générale à symétrie de révolution. [Claim 8] Part according to any one of claims 1 to 6, having a general shape with symmetry of revolution.
[Revendication 9] Pièce selon la revendication 8 formant une enveloppe de chambre de combustion de moteur-fusée (10). [Claim 9] A part according to claim 8 forming a rocket engine combustion chamber envelope (10).
[Revendication 10] Moteur-fusée (100) comprenant une enveloppe de chambre de combustion (10) selon la revendication 9. [Claim 10] A rocket motor (100) comprising a combustion chamber shell (10) according to claim 9.
EP21731246.1A 2020-05-20 2021-05-11 Structure for assembling a piece comprising a first metal part and a second part made of an organic matrix composite material Pending EP4153407A1 (en)

Applications Claiming Priority (2)

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FR2005270A FR3110483B1 (en) 2020-05-20 2020-05-20 One-piece assembly structure comprising a first metal part and a second part made of organic matrix composite material
PCT/FR2021/050811 WO2021234244A1 (en) 2020-05-20 2021-05-11 Structure for assembling a piece comprising a first metal part and a second part made of an organic matrix composite material

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FR3110483B1 (en) * 2020-05-20 2022-06-03 Arianegroup Sas One-piece assembly structure comprising a first metal part and a second part made of organic matrix composite material

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US11904387B2 (en) 2024-02-20
US20230184199A1 (en) 2023-06-15
FR3110483B1 (en) 2022-06-03
FR3110483A1 (en) 2021-11-26
JP2023526532A (en) 2023-06-21

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