WO2015070409A1 - Procédé de fabrication d'une structure creuse - Google Patents

Procédé de fabrication d'une structure creuse Download PDF

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Publication number
WO2015070409A1
WO2015070409A1 PCT/CN2013/087108 CN2013087108W WO2015070409A1 WO 2015070409 A1 WO2015070409 A1 WO 2015070409A1 CN 2013087108 W CN2013087108 W CN 2013087108W WO 2015070409 A1 WO2015070409 A1 WO 2015070409A1
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WO
WIPO (PCT)
Prior art keywords
sheet
layer
sheets
hollow structure
adjacent
Prior art date
Application number
PCT/CN2013/087108
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English (en)
Chinese (zh)
Inventor
王志强
Original Assignee
深圳智慧能源技术有限公司
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 深圳智慧能源技术有限公司 filed Critical 深圳智慧能源技术有限公司
Priority to PCT/CN2013/087108 priority Critical patent/WO2015070409A1/fr
Publication of WO2015070409A1 publication Critical patent/WO2015070409A1/fr

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    • 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
    • B21D26/021—Deforming sheet bodies
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/029—Closing or sealing 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
    • B21D53/00—Making other particular articles
    • B21D53/92—Making other particular articles other parts for aircraft

Definitions

  • the present invention relates to a method of making a hollow structure, and more particularly to a method of making a hollow structure of a metal or alloy.
  • Hollow structures provide better performance than solid structures in many applications.
  • the hollow structure can reduce weight, increase structural strength, and provide excellent blade cooling performance, and therefore it has been desired in the industry to adopt such a hollow structure blade.
  • the blade of a turbine engine is such a structure having an irregular cross section, and thus the existing method of manufacturing a hollow structure can hardly be used to manufacture a blade of a hollow structure.
  • this paper proposes a method of manufacturing a hollow structure that can reduce costs.
  • a method of manufacturing a hollow structure comprising: providing a multi-layer sheet structure, wherein each layer of the multi-layer sheet structure has a joint portion and a non-joining portion, and a joint portion of each adjacent layer sheet is at a joint portion thereof Fixing together; heating the multi-layer sheet structure to a softening temperature of at least a portion of the sheet; and, at the softening temperature, pressurizing the fluid between adjacent sheets to cause the multi-layer sheet structure to occur
  • the deformation is to form a hollow structure in which each adjacent layer plate is fixedly bonded at its joint portion to form a cavity at its non-joining portion.
  • the sheet material may be a metal or alloy material.
  • the multi-layer sheet structure is placed in a mold, and the fluid is pressed between adjacent sheets to deform the multi-layer sheet structure to the boundary surface of the mold.
  • the softening temperature and the state of being pressurized with the fluid are maintained for a predetermined period of time.
  • each layer of the multi-layer sheet structure comprises a top sheet, a bottom sheet, and at least one intermediate sheet between the top sheet and the bottom sheet, the at least one intermediate sheet having the opposite Two plate surfaces, the two plate surfaces are respectively fixedly coupled with the adjacent two other plates at their joint portions, and under the pressure of the fluid, the two plate surfaces are respectively The cavity is formed between the adjacent two sheets of sheets at their non-joining portions.
  • the multi-layer sheet structure is provided at its peripheral region with at least one fluid inlet for the fluid to enter between adjacent layers of sheets, the joint of the layers of sheets comprising a periphery of the peripheral portion of the sheet.
  • the bonding zone is such that the layers of the multi-layer sheet structure are sealed and joined together in the peripheral region except the position of the at least one fluid inlet, and the joint of the layers of the sheets further includes the sheet.
  • the internal junction zone of the central area is provided at its peripheral region with at least one fluid inlet for the fluid to enter between adjacent layers of sheets, the joint of the layers of sheets comprising a periphery of the peripheral portion of the sheet.
  • the at least one intermediate sheet is provided with at least one through hole at its non-joining portion to allow the fluid to flow from one of the two sheet surfaces to the other sheet surface.
  • the inner bonding regions are discretely distributed at a plurality of locations on opposite glass sheet surfaces, and the inner bonding region of the at least one intermediate layer sheet The inner bonding zone corresponding to the position of the other two adjacent sheets is fixedly coupled.
  • the inner joint region is offset from a plurality of positions on one of the sheet surfaces and a plurality of positions on the other sheet surface.
  • the position of the inner bond zone on the surface of the sheet material is a plurality of point locations.
  • the inner bond regions are distributed at a plurality of line locations on opposite plate surface surfaces thereof.
  • the at least one intermediate layer sheet is provided with a plurality of indentations that promote deformation at its non-joined portion.
  • the hollow structure is a turbine blade
  • each layer of the multi-layer sheet structure comprises a top sheet, a bottom sheet, and at least one intermediate sheet between the top sheet and the bottom sheet.
  • the at least one intermediate layer sheet is deformed into a pleated structure to form the cavity with the adjacent two sheets, and the softening temperature of the top sheet and the bottom sheet is higher than the at least The softening temperature of an intermediate sheet.
  • the hollow structure is a turbine blade
  • each layer of the multi-layer plate structure comprises at least three first plates and a second plate between each two adjacent first plates.
  • the second plate material is deformed into a pleated structure to form the cavity with the adjacent two layers of the first plate, the first plate material is transformed into a curved structure, the first plate
  • the softening temperature is higher than the softening temperature of the second sheet.
  • the method described herein can produce a variety of hollow structures.
  • This method is simple in steps and significantly reduces the manufacturing cost of the hollow structure, especially for complex hollow structures, such as honeycomb structures.
  • This method is especially useful for the manufacture of blades for turbine engines.
  • the hollow structure produced by the present invention increases structural strength, reduces weight, and saves material.
  • the internal hollow structure facilitates cooling of the hollow structure.
  • Figure 1 is a general flow diagram of a method of making a hollow structure.
  • FIG. 2 is a schematic illustration of one embodiment of a multilayer sheet structure.
  • Figure 3 is an exploded view of one of the intermediate sheets and their two adjacent sheets.
  • Fig. 4 is a schematic view of a joint portion of one of the intermediate layer sheets.
  • Figure 5 is a schematic illustration of fluid pressurization.
  • 6 to 8 are schematic views of different embodiments of the hollow structure obtained after deformation of the sheet material.
  • Figure 9 is a schematic illustration of another embodiment of a joint of sheets.
  • Figure 10 is a schematic illustration of a hollow structure obtained from the sheet structure of Figure 9.
  • Figure 11 is a schematic illustration of another embodiment of an intermediate layer sheet.
  • 12 and 13 are schematic views of another embodiment of a hollow structure.
  • FIG. 1 is a general flow diagram of a method of making a hollow structure.
  • a multi-layer sheet structure is first provided.
  • Each layer of the multi-layer sheet structure has a joint portion and a non-joined portion, and the adjacent sheets are fixedly joined together at their joint portions.
  • the multilayer sheet structure is heated to a softening temperature of at least a portion of the sheet.
  • the fluid between the adjacent layer sheets is pressurized, so that the multi-layer sheet structure is deformed to form the adjacent layer sheets fixedly bonded at their joint portions.
  • the joint forms a hollow structure of the cavity.
  • each of the layers of the multi-layer sheet structure 108 includes a top sheet 110, a bottom sheet 114, and at least one intermediate sheet 112 between the top sheet 110 and the bottom sheet 114.
  • the structure shown in Figure 2 depicts two intermediate layer sheets 112. In other embodiments, the number of intermediate layer sheets 112 may be one layer or more than two layers, as desired.
  • the directional terms "top layer” and "bottom layer” are used herein for convenience of description and do not limit the orientation of the multilayer sheet structure.
  • the intermediate sheet 112 has opposite sheet faces 116 and 118 which are fixedly joined to the adjacent other two sheets at their joints, respectively.
  • the adjacent sheet facing one of the sheet surfaces 116 (upper surface 116 in the drawing) of the intermediate sheet 112 may be the top sheet 110 or another intermediate sheet. 112.
  • the adjacent sheet facing the other sheet surface 118 (lower surface 118 in the drawing) of the intermediate sheet 112 may be the bottom sheet 114 or another intermediate sheet 112.
  • Each layer of the multi-layer sheet structure 108 has a joint portion and a non-joined portion, and the adjacent layer sheets are fixedly joined together at their joint portions.
  • the material of these sheets may be metal or alloy materials, and the fixed combination of these joints may be performed by welding or casting.
  • the multi-layer sheet structure 108 is provided at its periphery with at least one fluid inlet 120 (see FIG. 1) for pressurized fluid to enter between adjacent layers of sheet material.
  • the fluid inlet 120 may be disposed on an edge of one of the sheets adjacent to the adjacent sheet or may be disposed on the adjacent two sheets. In the example shown in Figure 3, the fluid inlet 120 is disposed on two adjacent sheets of material.
  • each layer of sheet material includes a peripheral joint region located in a peripheral region of the sheet material and an inner joint region at a central portion of the sheet material.
  • the peripheral bonding zone and the inner bonding zone are disposed on the two opposite sheet surfaces 116 and 118 of the intermediate layer sheet 112; for the top sheet 110 and the bottom sheet 114, only facing the multilayer sheet These bonding areas are provided on the surface inside the structure 108.
  • the peripheral region of the upper surface 116 of each intermediate layer sheet 112 has a peripheral peripheral bond region 122 in addition to the fluid inlet 120 location.
  • the peripheral region of the lower surface 118 of each of the intermediate sheets 112 is also provided with a peripheral bonding zone (not visible from the perspective of the drawing).
  • the corresponding peripheral bonding regions of the adjacent layer sheets are fixedly joined such that the layers of the multi-layer sheet structure 108 are sealingly fixedly bonded together except for the position of the fluid inlet 120 in the peripheral portion thereof.
  • the central portion of the upper surface 116 of the intermediate sheet 112 is provided with an inner bond region 124, and the central portion of the lower surface 118 is provided with an inner bond region 126 (it should be understood that these inner bond regions 126 are located on the other side 118 of the sheet 112).
  • the "middle area” as used herein is relative to the aforementioned “peripheral area”, which can be understood as all areas within the peripheral area, not just the area in the center of the sheet.
  • the inner joint regions are discretely distributed at a plurality of locations on the opposite sheet surfaces 116, 118 of the intermediate layer sheet 112, and the surfaces of the adjacent two sheets are correspondingly disposed.
  • each intermediate ply 112 is fixedly bonded to the inner bond zone of the corresponding position of the adjacent two ply panels.
  • the interior bond areas 124 are offset from one another at a plurality of locations on one of the sheet surfaces 116 and at a plurality of locations on the other sheet surface 118.
  • the inner bond zone 124 is located at a plurality of line locations on the sheet surface 116
  • the inner bond zone 126 is located at a plurality of line locations on the sheet surface 118
  • the inner bond zone 124 The plurality of line positions are offset from the plurality of line positions of the inner bond area 126.
  • the intermediate layer sheet 112 is further provided with a through hole 125 communicating with the upper surface 116 and the lower surface 118.
  • the through hole 125 functions to allow fluid to flow from one of the sheet surfaces to the other sheet surface, specifically to pressurize the fluid behind. Described in the steps.
  • the multilayer sheet structure is heated.
  • heating can be carried out in a vacuum furnace.
  • the purpose of the heating is to soften the sheet to make the deformation of the subsequent sheet easier.
  • the individual sheets may be made of materials having different softening temperatures.
  • the softening temperature of the intermediate sheet is lower than the softening temperature of the top and bottom sheets.
  • fluid is injected from the fluid inlet 120 between the sheets to pressurize between the sheets.
  • This pressurization procedure is accomplished in a mold (not shown) that defines the contour of the final hollow structure.
  • the pressurized fluid will flow along the non-bonded portion of the sheet, and due to the pressure of the fluid, the sheet that is softened at high temperatures will be deformed to form a cavity 134 between the non-bonded portions of adjacent sheets, while the previous combination is fixed.
  • the joint is maintained in a fixed joint state.
  • the outer surface of the deformed monolithic structure is limited by the surface of the mold.
  • the pressurized fluid can be a gas or a liquid.
  • flow paths for fluid flow are formed between the non-bonded portions of adjacent layer sheets, and these flow paths ultimately form a hollow structure cavity 134.
  • the formation of these flow paths is based on the joint between the adjacent layers of the sheet material. Therefore, by designing different joint portions, different hollow structures can be obtained.
  • the through hole 125 of the intermediate layer sheet 112 is directed to circulate between the two surfaces 116, 118.
  • a fluid inlet 120 may be provided separately between each two adjacent layers of sheet material.
  • some or all of the interlayer sheets 112 may not be provided with such through holes 125.
  • Figure 6 depicts a hollow structure having two intermediate layer sheets 112. It can be seen that the two intermediate sheets 112 have a greater degree of deformation relative to the outermost sheet, so that the intermediate layer 112 is deformed into a pleated structure under the action of the pressure of the pressurized fluid and the pulling action of the top layer 110 and the bottom sheet 114. Thereby forming a hollow structure of honeycomb shape.
  • Figure 7 depicts a hollow structure with only one intermediate layer of sheet material 112. Similar to the structure of Fig. 6, the intermediate layer sheet 112 also has a greater degree of deformation and is deformed into a pleated structure.
  • Figure 8 also depicts a hollow structure with only one intermediate layer of sheet material 112. Different from FIG. 7, the width of the inner bonding regions 124, 126 in FIG. 8 is greater than the width of the inner bonding region in FIG. It should be understood that the width of the bond zone can vary depending on the specific product requirements.
  • Figure 9 depicts an embodiment of another bonding zone. Unlike the linear or strip-shaped bond regions of the previous embodiments, the embodiment of Figure 9 shows the point-like inner bond regions 124, 126, i.e., the inner bond regions 124, 126 are discretely distributed at a plurality of dot locations. For example, in Fig. 9, the dot positions of the inner joint regions 124, 126 on the opposite surfaces of the intermediate layer sheet are indicated by "x" and "0", respectively. It can be seen that the locations of the inner bond regions 124, 126 on the opposite surfaces are interdigitated.
  • the intermediate layer plate 112 which is staggered and fixed at a multi-point position, after being deformed, forms a structure of unevenness shown in FIG.
  • FIG. 11 depicts a schematic view of another intermediate layer sheet 212.
  • the inner bond regions 224, 226 on the intermediate layer sheet 212 are similar to the inner bond regions 124, 126 of FIG.
  • the intermediate layer plate 212 is provided with a plurality of notches 214 for promoting deformation at its non-joining portion.
  • the provision of the notch 214 not only promotes deformation of the intermediate layer sheet 212, but also saves material.
  • the indentations 214 are spaced from the inner bond zones 224, 226 (denoted by "x" and "0").
  • these notches 214 are represented by squares, and actually they may be of any shape as long as the effect of promoting deformation can be achieved.
  • Each of the layers of the multi-layer board structure may include at least three first sheets and a second sheet between each two adjacent first sheets. Under the action of the fluid, the second sheet material is deformed into a pleated structure to form a cavity between the adjacent two first sheets, and the first sheets are deformed into a curved structure.
  • Figure 12 depicts a five-layer sheet structure constructed using the hollow structure described above.
  • the five-layer board comprises three first sheets 310 and two second sheets 312, wherein the second sheets 312 are alternately arranged with the first sheets 310, that is, each second sheet 312 is located adjacent to the two first sheets 310. between.
  • the softening temperature of the second sheet 312 is lower than the softening temperature of the first sheet 310.
  • the second sheet 312 After the fluid is pressurized, the second sheet 312 has a greater degree of deformation to form a pleated structure, and the first sheet 310 has a smaller degree of deformation and becomes a curved structure.
  • the deformation of the outermost two layers of the first sheet 310 is limited by the surface of the mold (not shown).
  • Figure 13 depicts a nine-layer sheet structure constructed in the manner described above.
  • the nine-layer board comprises five first sheets 410 and four second sheets 412, wherein the second sheets 412 are alternately arranged with the first sheets 410, that is, each second sheet 412 is located adjacent to the two first sheets 410. between.
  • the softening temperature of the second sheet 412 is lower than the softening temperature of the first sheet 410.
  • the second sheet 412 After the fluid is pressurized, the second sheet 412 has a greater degree of deformation to form a pleated structure, and the first sheet 410 has a smaller degree of deformation and becomes a curved structure.
  • the deformation of the outermost two layers of the first sheet 410 is limited by the surface of the mold (not shown).
  • a hollow structure of the present invention is described by way of example. It should be understood that the present invention can produce a variety of hollow structures depending on the initial multilayer sheet structure. This approach significantly reduces the manufacturing cost of the hollow structure, especially for complex hollow structures, such as honeycomb structures. This hollow structure increases structural strength, reduces weight, and saves material. For hollow structures used in high temperature applications, such as the blades of turbine engines mentioned below, the internal hollow structure facilitates the cooling of the hollow structure.
  • One application of the approach presented herein is to fabricate blades for turbine engines.
  • the deformation of the outermost sheet will form the shape of the blade, and the deformation of the intermediate sheet will form the rib inside the blade.
  • the pleated structures in FIGS. 6 to 8, 10, and 12 to 13 can be used as the ribs of the blade.
  • the hollow structure of the blade increases structural strength, reduces weight, saves material, and provides better heat dissipation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une structure creuse consistant à : fournir une structure de feuille multicouche, chaque couche de la structure de feuille multicouche comportant une partie de liaison et une partie sans liaison, des couches adjacentes étant reliées ensemble de manière fixe au niveau des parties de liaison ; chauffer la structure multicouche à une température qui fait fondre au moins quelques couches de la feuille ; et, à ce point de fusion, utiliser un liquide pour mettre sous pression les couches adjacentes de telle sorte que la structure multicouche change de forme afin de former une structure creuse dans laquelle des couches adjacentes sont reliées ensemble de manière fixe au niveau des parties de liaison et les parties sans liaison forment une cavité. Ce procédé peut être utilisé pour fabriquer des pales de turbine.
PCT/CN2013/087108 2013-11-14 2013-11-14 Procédé de fabrication d'une structure creuse WO2015070409A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2013/087108 WO2015070409A1 (fr) 2013-11-14 2013-11-14 Procédé de fabrication d'une structure creuse

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Application Number Priority Date Filing Date Title
PCT/CN2013/087108 WO2015070409A1 (fr) 2013-11-14 2013-11-14 Procédé de fabrication d'une structure creuse

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623204A (en) * 1970-02-02 1971-11-30 Gen Motors Corp Method of fabricating hollow gas turbine blades
US5253419A (en) * 1991-02-20 1993-10-19 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." Method of manufacturing a hollow blade for a turboshaft engine
US5896658A (en) * 1996-10-16 1999-04-27 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Method of manufacturing a hollow blade for a turbomachine
US5946802A (en) * 1996-08-14 1999-09-07 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Process for the manufacture of a hollow turbomachine blade and apparatus for use in said process
US20100021693A1 (en) * 2008-07-24 2010-01-28 Rolls-Royce Plc Aerofoil sub-assembly, an aerofoil and a method of making an aerofoil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623204A (en) * 1970-02-02 1971-11-30 Gen Motors Corp Method of fabricating hollow gas turbine blades
US5253419A (en) * 1991-02-20 1993-10-19 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." Method of manufacturing a hollow blade for a turboshaft engine
US5946802A (en) * 1996-08-14 1999-09-07 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Process for the manufacture of a hollow turbomachine blade and apparatus for use in said process
US5896658A (en) * 1996-10-16 1999-04-27 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Method of manufacturing a hollow blade for a turbomachine
US20100021693A1 (en) * 2008-07-24 2010-01-28 Rolls-Royce Plc Aerofoil sub-assembly, an aerofoil and a method of making an aerofoil

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