EP4153408A1 - Struktur zur montage eines teils mit einem ersten metallteil und einem zweiten teil aus einem organischen matrixverbundstoff - Google Patents

Struktur zur montage eines teils mit einem ersten metallteil und einem zweiten teil aus einem organischen matrixverbundstoff

Info

Publication number
EP4153408A1
EP4153408A1 EP21731247.9A EP21731247A EP4153408A1 EP 4153408 A1 EP4153408 A1 EP 4153408A1 EP 21731247 A EP21731247 A EP 21731247A EP 4153408 A1 EP4153408 A1 EP 4153408A1
Authority
EP
European Patent Office
Prior art keywords
connection portion
blind holes
holes
depth
blind
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
EP21731247.9A
Other languages
English (en)
French (fr)
Inventor
Arnaud Fontaine
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 EP4153408A1 publication Critical patent/EP4153408A1/de
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
    • 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
    • F02K9/97—Rocket nozzles
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • 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
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • 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
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • 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
    • 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
    • B33Y10/00—Processes of additive manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/76—Application in combination with an electrical generator
    • 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

Definitions

  • One-piece assembly structure comprising a first metal part and a second part made of composite material with an organic matrix
  • This disclosure relates to a part comprising a metal part and a part of composite material with an organic matrix assembled together.
  • a part can be a rocket engine combustion chamber casing, but not exclusively.
  • Parts comprising a metal part and a part made of a composite material with an organic matrix assembled together.
  • the assembly of these two parts is very often perfectible and, for example, is not always suitable for a component such as a rocket engine combustion chamber casing. There is therefore a need in this direction.
  • 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 blind 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 another portion as the first connection portion and extending into the at least one blind hole, whereby the first part and the second part are fixed to each other.
  • connection portion of one part is the portion which is in contact and cooperates directly with the other part.
  • 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.
  • the second connection portion has one or more blind holes.
  • the blind hole or “the hole” is meant “the at least one blind hole”.
  • the fixing element may be in a metal shade identical to that of the first part, but not necessarily.
  • the fixing element is fixed to the first part by enclosing at least part of the second connection portion.
  • the second connection portion is blocked between the first connection portion and the fixing element.
  • the fastening element is attached directly to the first part on a portion other than the first connection portion.
  • the fixing element has a projection which engages in and fills all or part of the blind hole. This projection forms a lug for locking and maintaining the second connection portion.
  • the second connection portion is therefore sandwiched between the first connection portion and the fixing element, and blocked within the sandwich by the projection of the fixing element, which is itself fixed directly to the first part. .
  • the parts can be plates, flat or curved, and the fixing portions form flanges, flat or curved.
  • 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 blind 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 respectively arranged on either side of the second connection portion in the third direction.
  • the first and / or the second direction may be rectilinear or curved, for example in a similar or comparable manner to the directions defined in a Cartesian, cylindrical or spherical coordinate system.
  • the at least one 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 said at least one blind hole being inclined with respect to the geometric axis so as to form a convergent from the entrance to the bottom.
  • 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 face the fixing element.
  • a configuration is particularly suitable when the fixing element is formed by cold additive metal deposition.
  • such a hole forms a conical or frustoconical hole converging from the entrance to the bottom.
  • the part has at least two rows of blind holes, the holes of each row being staggered with respect to the blind holes of the adjacent row or rows.
  • the holes of a first row are offset from the holes of a second row adjacent to the first row, in the direction of alignment of the holes within the same row.
  • the holes of a first row are opposite the spacing between two holes of a second row adjacent to the first row, considered in a direction perpendicular to the direction of alignment of the holes within the same row.
  • Such a staggered arrangement makes it possible to increase the number of holes per unit area, while ensuring a minimum spacing between the holes so as to preserve the mechanical and structural integrity of the second connection portion, in particular during the resumption of shear forces.
  • At least a first blind hole has a first depth
  • at least a second blind hole has a second depth, the second depth being smaller than the first depth
  • the second connection portion may have one or more first blind holes, one or more second blind holes, and possibly one or more third, fourth and so on. blind holes, third, fourth, etc. blind holes respectively having a third, fourth, etc. different depths from each other and different from the first and second depths.
  • the first / second / etc. hole means“ the at least a first / second / etc. blind hole ”.
  • the depth extends along the geometric axis of the hole, or along the third direction mentioned above by way of example.
  • the first deeper hole is configured to primarily take up the shear forces between the second connection portion and the fastener while the second shallower hole is primarily configured to provide adhesion between the fastener. and the second connection portion.
  • the part has several first blind holes, the first holes all having the same first maximum diameter, the centers of the adjacent first blind holes being spaced from each other by at least twice the first diameter maximum.
  • the part has several second blind holes all having the same second maximum diameter smaller than the first maximum diameter, the first depth being at least twice as great, for example three times as great, as the second depth, the second blind holes being arranged between the first blind holes.
  • a maximum diameter is the largest diameter of the hole along the geometric axis of the hole.
  • the diameter is constant along the geometric axis of the hole so that the maximum diameter is equal to this constant diameter.
  • the maximum diameter along the geometric axis of the hole is the diameter at the entrance of the hole.
  • one or more second holes can be placed between two adjacent first holes without risk to the mechanical and structural integrity of the second connection portion, in particular when the shear forces are taken up. This also improves the adhesion between the second connection portion and the fastener.
  • the first blind holes are arranged in rows and staggered, the first blind holes all having the same first maximum diameter, the spacing between two adjacent rows of first blind holes being less than or equal to two maximum first diameters, the spacing being measured between the lines of each adjacent row where the centers of the first blind holes are located.
  • the centers of the first adjacent blind holes may be spaced from each other by at least twice the maximum first diameter.
  • 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 disposed side by side in the first direction, the at least one blind hole extending in the third direction
  • the fixing element has a first fixing portion extending only over the portion of the first part other than the first connection portion, said first attachment portion having a width measured in the first direction, and a second attachment portion extending only over the second connection portion, the second attachment portion having a thickness measured in the third direction, the minimum value of the width being greater than or equal to the minimum value of l 'thickness and less than or equal to three times the minimum value of the thickness.
  • the first connection portion comprises a shoulder configured to cooperate with the second connection portion.
  • the shoulder provides an additional surface for cooperation between the first and the second part, and reinforces the strength of the assembly.
  • the first portion forms a step defining a shoulder.
  • the shoulder extends in the second and third direction.
  • the fastener is formed by additive manufacturing by projection deposition of metal powder entrained by a cold gas, also known by the acronym CGS for "Cold Gas Spraying" in English.
  • 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.
  • Such a fastening element is particularly easy to manufacture, makes it possible to dispense with the welding or bolting steps of the state of the art, and thus has a relatively small mass.
  • a protective layer is disposed between the fastening element and the second connection portion.
  • Such a protective layer makes it possible to protect the second connection portion, and in particular the side wall of the hole, for example when the fixing element is formed by additive manufacturing by deposition by projection of 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.
  • the protective layer can also extend over the entire interface between the second part and the fastener.
  • the part has a general shape with symmetry of revolution.
  • the assembly structure according to the present disclosure is particularly well suited to annular parts.
  • the part forms a rocket engine combustion chamber envelope.
  • the assembly structure according to the present disclosure is particularly well suited for a rocket engine combustion chamber casing.
  • 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.
  • Figure 2 shows the envelope of the combustion chamber of the rocket engine of Figure 1
  • FIG. 3 represents the assembly structure between a metallic part and a part made of composite material with an organic matrix of the casing of the combustion chamber, seen along the section plane III of FIG. 2, and
  • Figure 4 shows a developed view of blind holes of the second connection portion.
  • 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. organic matrix composite material 14 and a fastener 16 for securing the first part 12 with the second part 14.
  • the fastener 16 is single and forms an annular flange.
  • the combustion chamber casing 10 is 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.
  • the axial direction corresponds to the direction of the geometric axis X of the part 10
  • 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.
  • the DA, DB and DC coordinate system forms a local coordinate system in the X, C, R coordinate system.
  • 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
  • the fixing element 16 is made of a steel-type or nickel-based metal alloy.
  • Other materials are possible.
  • 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 the fixing element 16.
  • Figure 4 shows a developed view of the second connection portion 14A of the second part 14.
  • the first part 12 comprises a first connection portion 12A having a shoulder 12C.
  • the shoulder 12C extends transversely to the first direction DA.
  • 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 plurality of blind holes, in this example several first blind holes 14B1 and several second blind holes 14B2 (see also FIG. 4).
  • Each hole 14B1 and 14B2 has a geometric axis At, which extends in the third direction DC, and respectively has a side wall 14B11, 14B21.
  • the holes 14B1 and 14B2 are of conical shape, the side wall 14B11, 14B21 being uniformly inclined with respect to the axis At, forming a convergent from the fixing element 16 (or the entry of the hole) towards the first connection portion 12A (or the bottom of the hole).
  • any other form of blind hole is possible.
  • the first holes 14B1 are all identical and in particular all have the same first maximum diameter D1 and the same first depth P1.
  • the second holes 14B2 are all identical and in particular all have the same second maximum diameter D2 and the same second depth P2.
  • the centers C1 of the first adjacent holes 14B1 are spaced by a minimum distance D, in this example greater than twice the diameter D1 of the first holes 14B1, for example equal to four times the diameter D1 of the first holes 14B1.
  • the first holes 14B1 are arranged in rows. In this example, there are two adjacent rows R1 and R2 of first holes 14B1, within each row R1 and R2 the centers C1 of the first holes 14B1 being aligned on a line L1. The first 14B1 holes in one row are staggered from the first three 14B1s in the other row.
  • the second holes 14B2 are arranged between the first holes 14B1.
  • the second connection portion 14B is equipped with a protective layer 18. 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 walls 14B11, 14B21 of the holes 14B1 and 14B2 but also on the walls of the second part 14 facing the fixing element 16.
  • the 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.
  • the metal used for the protective layer 18 is copper, but any other metallic material can be envisaged.
  • the fastener 16 and formed by additive manufacturing by deposition by spraying metal powder entrained by a cold gas.
  • the protective layer 18 protects the second connection portion 14B during the formation of the fixing element 16, in particular from any abrasion which could result from the projection of the metal powder.
  • the fixing element 16 encloses, with the first part 12, the whole of the second connection portion 14A, in the third direction DC.
  • the fixing element 16 extends into the blind holes 14B1 and 14B2.
  • the fixing element 16 is 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.
  • the fixing element 16 has a first fixing portion 16A extending only over the portion 12D.
  • the first fixing portion 16A has a width L measured in the first direction DA.
  • the width L of the first fixing portion 16A is constant in the third direction DC.
  • the fastening element 16 has a second fastening portion 16B extending only over the second connecting portion 14A.
  • the second fixing portion 16B has a minimum thickness Emin (ie a minimum value of the thickness of the second fixing portion 16B), the thickness being measured in the third direction DC.
  • the minimum value of the width L is greater than the minimum thickness Emin and less than three times the minimum thickness Emin.
  • the fixing element 16 makes it possible to block the second connection portion 14A and to stiffen the assembly, which in particular reduces the bending deformations F (in the radial direction R, around the circumferential direction C) by all.
  • the fastener 16 forming an annular flange extending over the entire circumferential direction C, improves the reduction of bending deformations around the axial direction X of the assembly.
  • the fixing points are therefore less stressed and their mechanical strength is reinforced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Plates (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Powder Metallurgy (AREA)
EP21731247.9A 2020-05-20 2021-05-11 Struktur zur montage eines teils mit einem ersten metallteil und einem zweiten teil aus einem organischen matrixverbundstoff Pending EP4153408A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2005274A FR3110482B1 (fr) 2020-05-20 2020-05-20 Structure d’assemblage d’une pièce comprenant une première partie métallique et une deuxième partie en matériau composite à matrice organique
PCT/FR2021/050812 WO2021234245A1 (fr) 2020-05-20 2021-05-11 Structure d'assemblage d'une pièce comprenant une première partie métallique et une deuxième partie en matériau composite à matrice organique

Publications (1)

Publication Number Publication Date
EP4153408A1 true EP4153408A1 (de) 2023-03-29

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Application Number Title Priority Date Filing Date
EP21731247.9A Pending EP4153408A1 (de) 2020-05-20 2021-05-11 Struktur zur montage eines teils mit einem ersten metallteil und einem zweiten teil aus einem organischen matrixverbundstoff

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Country Link
US (1) US20230184198A1 (de)
EP (1) EP4153408A1 (de)
JP (1) JP2023529574A (de)
FR (1) FR3110482B1 (de)
WO (1) WO2021234245A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4143528C2 (de) * 1990-10-23 1996-08-29 Gkn Glaenzer Spicer Verbindung zwischen einer rohrförmigen Welle aus einem Faserverbundwerkstoff und einem Metallzapfen
FR2722249B1 (fr) * 1994-07-08 1996-10-04 Europ Propulsion Chambre de combustion de propulseur avec liaison etanche entre structure tubulaire composite et fond
US7819452B2 (en) * 2008-05-12 2010-10-26 United States Council For Automotive Research Automotive structural joint and method of making same
FR3042542B1 (fr) * 2015-10-20 2017-12-01 Snecma Chambre propulsive et procede de fabrication
FR3065663B1 (fr) * 2017-04-28 2019-06-28 Faurecia Automotive Composites Procede d'assemblage de deux pieces de materiaux differents et ensemble issu du procede d'assemblage

Also Published As

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WO2021234245A1 (fr) 2021-11-25
FR3110482A1 (fr) 2021-11-26
US20230184198A1 (en) 2023-06-15
FR3110482B1 (fr) 2022-06-03
JP2023529574A (ja) 2023-07-11

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