Classifications

• • 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
  • B23K3/00—Tools, devices or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
  • B23K3/08—Auxiliary devices therefor
  • B23K3/087—Soldering or brazing jigs, fixtures or clamping means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
  • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
  • B21D26/033—Deforming tubular bodies
• • 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
  • B23K1/00—Soldering, e.g. brazing, or unsoldering
  • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
  • B23K1/0018—Brazing of turbine parts
• • 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
  • B23K1/00—Soldering, e.g. brazing, or unsoldering
  • B23K1/008—Soldering within a furnace
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02K—JET-PROPULSION PLANTS
  • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
  • F02K1/78—Other construction of jet pipes
  • F02K1/80—Couplings or connections
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02K—JET-PROPULSION PLANTS
  • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
  • F02K1/78—Other construction of jet pipes
  • F02K1/82—Jet pipe walls, e.g. liners
  • F02K1/827—Sound absorbing structures or liners
• • 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
  • B23K1/00—Soldering, e.g. brazing, or unsoldering
  • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
  • B23K1/0014—Brazing of honeycomb sandwich structures
• • 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
  • B23K2101/00—Articles made by soldering, welding or cutting
  • B23K2101/001—Turbines
• • 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
  • F05D2230/00—Manufacture
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
• • 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
  • F05D2230/00—Manufacture
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
  • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
  • F05D2230/237—Brazing
• • 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
  • F05D2250/00—Geometry
  • F05D2250/20—Three-dimensional
  • F05D2250/28—Three-dimensional patterned
  • F05D2250/283—Three-dimensional patterned honeycomb
• • 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
  • F05D2300/00—Materials; Properties thereof
  • F05D2300/50—Intrinsic material properties or characteristics
  • F05D2300/502—Thermal properties

Definitions

• the invention lies in the field of turbojet engine nacelles and more specifically relates to a device for assembling parts to be soldered.
• Such a device comprises a cylindrical central barrel constituting a gaseous chamber, contained in a counter-form on which is fixed by screwing a sealing device constituted by upper and lower flanges.
• the pressure is applied to a cylindrical inner skin, causing the plating of said skin on a honeycomb structure, then the assembly consisting of the inner skin and the honeycomb on an outer skin.
• the cylindrical inner skin / honeycomb / outer skin assembly deforms under the effect of pressure until it encounters the counter-shape whose inner surface adopts the desired final shape.
• Such devices have drawbacks in particular in that the use of a metal brazing tool is expensive not only in itself but also in terms of maintenance, and furthermore involves an additional cost of the thermal cycle related to the inertia of the metal. tooling; one of the drawbacks of the use of a gas pressure soldering tool is that it entails an additional cost to achieve gaseous sealing, as well as technical difficulties such as the control of the pressure, time and temperature parameters in order to avoid a problem. crush the honeycomb and optimize the phenomenon of marking the honeycomb (telegraphing) on the skin).
• the object of the invention is to provide a device free of the aforementioned drawbacks.
• the subject of the present invention is a method of assembling an assembly comprising an inner wall, a faired outer wall and an intermediate element, each having substantially circular sections, the outer wall having a shape substantially complementary to that of the outer and inner surfaces of the intermediate element, and whose inner surface is intended to cover the outer surface of the intermediate element, the method being remarkable in that it comprises at least one step of setting up at least one solder sheet, whose melting temperature is lower than that of the other elements of the assembly, on at least one surface of the assembly intended to come into contact with another surface of the assembly, and at least one heating step by means of a furnace of an assembly comprising at least one of the outer or inner walls and the intermediate element between which is inserted at least one solder sheet so as to fix the external wall or internal solder on the intermediate element.
• the assembly method comprises one or more of the following optional features considered alone or in any of the possible combinations:
• the invention also relates to an assembly device for implementing a method as described above comprising a tool for the radial expansion by pressure of at least one solid element on the inner wall.
• the expansion tool may comprise a counterform having a shape substantially complementary to that of the outer wall, being in contact and covering the outer wall.
• Expansion tooling may include a hydroforming tool.
• the hydroforming tool may comprise a deformable bladder.
• Expansion tooling may include a hydraulic expansion tool.
• the hydraulic expansion tool may include at least one solid sector.
• the solid sector can be metallic.
• the invention also relates to an assembly obtained by a method as described above comprising the assembly comprising the inner wall, the outer wall and the intermediate element.
• the assembly may be such that the intermediate element is a honeycomb structure.
• the solder sheets may have a plurality of holes.
• the solder sheets may have a thickness such that the drilling of the different walls to be pierced is not altered or complicated.
• such a solution eliminates the use of metal brazing tools and soldering tools by gas pressure, which are expensive tooling time and money, not only in themselves but also in their maintenance, but also, and as a corollary, to simplify the brazing process.
• FIG. 1 is a sectional view of an assembly obtained by an assembly device according to a first and a second embodiment of the present invention
• FIG. 2 is a sectional view of an assembly device according to a second embodiment of the present invention.
• FIG. 3 is a sectional view of an assembly device according to a first embodiment of the present invention.
• the assembly consists of an acoustic nozzle comprising a sandwich structure with two faired walls, one internal 1 and the other external 2, between which is interposed a honeycomb acoustic structure 3.
• the inner 1 and outer 2 walls are fixed on the honeycomb structure 3 each by a solder sheet (not shown) covering respectively for one the entire inner surface 4 and for the other all the outer surface 5 3, and intended to be heated to their melting temperature in a vacuum oven after assembly to lier the inner 1 and outer walls 2 to the structure in n id Bees 3.
• the solder lamps have a lower melting temperature than the inner and outer walls 1 and 2 and the honeycomb structure 3.
• the assembling devices make it possible to assemble the inner wall 1 in a structure comprising the outer wall 2 careened and the acoustic structure in n id of bees 3, each having substantially circular sections.
• the careened outer wall 2 has a shape substantially complementary to that of the inner 4 and outer 5 surfaces of the honeycomb structure 3.
• the faired outer wall 2 is in contact with and covers the outer surface 4 of the honeycomb structure 3.
• the assembling devices comprise a counter-form 6 (not shown in FIG. 2) having a shape substantially complementary to that of the outer wall 2.
• the counter-form is in contact with and covers the outer wall 2.
• the assembly device comprises a tool capable of exerting pressure by contact with a second counter-form 7 of the tool on the inner wall 1 so as to this inner wall 1 comes into contact with and takes the shape of the inner surface 5 of the honeycomb structure 3.
• the inner surface 5 of the honeycomb structure 3 is covered with a solder plate so that the assembly once assembled the solder sheet is taken between the honeycomb structure 3 and the inner wall 1.
• the inner wall 1 is disposed around the second counter-form 7 of the assembly device.
• the second counter-form 7 of the tool serves as an impression for the shaping of the inner wall 1.
• This second counterform 7 makes it possible to give the inner wall 1 substantially the shape of the inner surface 5 of the honeycomb structure 3.
• the assembly device according to the first embodiment of the present invention is a hydraulic expansion assembly device.
• the second counterform 7 is a metalic sector 7 and is actuated by a pylon 8, or expansion core, introduced into the second counterform 7.
• the pylon 8, or expansion core has a shape substantially in cone and is introduced in the metal sector 7 so that the section of the pylon 8 of smaller diameter is introduced first into the metal sector 7.
• the maximum diameter to be introduced into the metal sector 7 is chosen in such a way that the second counterform 7 can form the inner wall 1 satisfactorily to achieve the assembly.
• the assembly device according to the second embodiment of the present invention is a hydroforming assembly device.
• the second counter-form 7 is a deformable bladder 7 and is actuated by a fluid, preferably water 8, but which can also be fluid.
• the bladder 7 has two open necked ends which are hermetically sealed by closures 9 and 10.
• the closure 10 comes into plane-on-plane contact with a transverse wall 1 1 having a flat surface substantially in plane-to-plane contact with the counterform 6.
• the closure 9 comprises a feeding device (not shown) in water 8 of the bladder 7.
• closures 9 and 10 are dimensioned in such a way that the bladder is able to shape the inner wall 1 satisfactorily to make the assembly of the inner wall 1 with the structure comprising the outer wall 2 and the honeycomb structure 3.
• a solder sheet is placed on the outer wall 2 so as to cover substantially the entire inner surface of the outer wall
• honeycomb structure 3 is installed inside the outer wall 2 in such a way that the fire of the armature is fully fully pressed against the outer wall 2 and the nest structure bee
• the inner wall 1 is introduced into the defined volume by the honeycomb structure 3, then expanded to take the shape of the inner surface 4 of the honeycomb structure 3 and to press the solder sheet onto the inner surface 4.
• the assembly can be placed in a vacuum oven (not shown) for soldering without tools, that is to say that the assembly is heated up to the melting point of the solder, the value of which is lower than that of the melting temperature of the assembly formed by the inner and outer walls 1 and the nest structure of bees 3; this operation makes it possible to assemble the inner 1 and outer 2 walls to the honeycomb structure 3.
• the brazing sheets may have a plurality of holes so that, once brazing has been performed, the solder does not cover the entire outer surface of the inner wall 1 nor the entire internal surface of the outer wall 2; thus the acoustic performance will remain satisfactory.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Exhaust Gas After Treatment (AREA)
• Connection Of Plates (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=49237246

Family Applications (1)

Country Status (4)

Families Citing this family (12)

Family Cites Families (48)

• 2013
  • 2013-04-15 FR FR1353392A patent/FR3004368B1/fr active Active
• 2014
  • 2014-04-15 WO PCT/FR2014/050915 patent/WO2014170596A2/fr not_active Ceased
  • 2014-04-15 EP EP14722278.0A patent/EP2986409A2/de not_active Withdrawn
• 2015
  • 2015-10-15 US US14/883,994 patent/US9789556B2/en active Active

Non-Patent Citations (1)

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