EP1474270A1 - Procede et dispositif pour maintenir un element metallique a assembler et procede pour assembler un element metallique a un autre element - Google Patents

Procede et dispositif pour maintenir un element metallique a assembler et procede pour assembler un element metallique a un autre element

Info

Publication number
EP1474270A1
EP1474270A1 EP03711820A EP03711820A EP1474270A1 EP 1474270 A1 EP1474270 A1 EP 1474270A1 EP 03711820 A EP03711820 A EP 03711820A EP 03711820 A EP03711820 A EP 03711820A EP 1474270 A1 EP1474270 A1 EP 1474270A1
Authority
EP
European Patent Office
Prior art keywords
component
cassette
joining
blade
positioning
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.)
Withdrawn
Application number
EP03711820A
Other languages
German (de)
English (en)
Inventor
Reinhold Meier
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.)
MEIER, REINHOLD
Original Assignee
MTU Aero Engines GmbH
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 MTU Aero Engines GmbH filed Critical MTU Aero Engines GmbH
Publication of EP1474270A1 publication Critical patent/EP1474270A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/1205—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using translation movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • B23Q3/063—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding turbine blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/08—Work-clamping means other than mechanically-actuated
    • B23Q3/086—Work-clamping means other than mechanically-actuated using a solidifying liquid, e.g. with freezing, setting or hardening means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/14—Clamps for work of special profile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/282—Selecting composite materials, e.g. blades with reinforcing filaments
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the invention relates to a method and. a device for holding a metallic component to be connected, in particular an airfoil for a gas turbine, and a method for connecting a metallic component, in particular an airfoil for a gas turbine, with a further component.
  • the problem on which the invention is based is to create a method for holding a metallic component of the type described at the outset, in which the component is treated as gently as possible with regard to its shape and surface during processing. A corresponding holding device is also to be created. In addition, a method for connecting a component held in this way to another component is to be provided.
  • the component is held flat and not punctually and its surface is therefore not subjected to punctual loads.
  • the foam structure which is dimensionally stable at ambient temperature, conforms almost completely to the surface of the component to be connected and provides a play-free, rigid, form-fitting coupling to the component directly or between the cassette, the foam structure and the component.
  • the surface or outer skin of the foam is thus homogeneous and compact that there is no damage to the surface of the component to be connected. Otherwise, the foam structure is cellular and has a porosity.
  • large forces can therefore be introduced via the component, e.g. B. for compressing the joining surfaces without the surface of the component being damaged, the shape of the component being changed or additional large-volume projections for applying force to the component having to be removed after the joining process.
  • Machining or joining surface is to be understood that the method is not only used when the metallic component to be held with its joining surface is joined by another component, e.g. is connected by welding, but also if the metallic component to be held is processed on a processing surface in a further step, such as an almost present in its finished form, e.g. forged or cast, airfoil for a gas turbine, the end face of which is to be finished in a further step, e.g. by milling.
  • a processing surface such as an almost present in its finished form, e.g. forged or cast, airfoil for a gas turbine, the end face of which is to be finished in a further step, e.g. by milling.
  • the foamable material usually comprises a foamable base material, e.g. a plastic or a metal, and a blowing agent that forms a gas when heated.
  • a foamable base material e.g. a plastic or a metal
  • a blowing agent that forms a gas when heated.
  • the heating is carried out to a foaming temperature which corresponds at least to the melting temperature of the foamable metal and is below the melting temperature of the component material.
  • a preferably metallic protective layer such as a galvanic Ni layer
  • cooling always takes place to a temperature below the melting or foaming temperature, preferably to room temperature, with the formation of a dimensionally stable, porous foam structure with a compact outer skin.
  • the method is for a component of a gas turbine, such as. B. an airfoil, suitable, since these airfoils generally as forged or cast components substantially in their finished form with other components, such as. B. a blade root, a blade shroud or a compressor or turbine carrier, are connected or still need to be processed, e.g. by milling on its face.
  • a component of a gas turbine such as. B. an airfoil
  • these airfoils generally as forged or cast components substantially in their finished form with other components, such as. B. a blade root, a blade shroud or a compressor or turbine carrier, are connected or still need to be processed, e.g. by milling on its face.
  • the shape or surface of such airfoils must not be selectively damaged during the joining or machining process and should largely be in the finished form.
  • the cassette can be formed in two or more parts, the individual parts of the cassette being fixed together in a suitable manner after the component has been positioned and the foamable material has been received, for. B. by screws or the like ..
  • the cassette consists of a sufficiently strong and rigid, metallic material, such as Steel.
  • a detachable spacer element preferably also made of steel, can be provided to vary the volume in the cassette in order to compensate for any shrinkage of the foam during cooling.
  • the spacer can be removed after cooling.
  • the parts of the cassette are then fixed in abutting manner, reducing the volume around the component, and any shrinkage is compensated for, thereby achieving a rigid coupling between the cassette, the foam structure and the component.
  • the foamable material In addition to the base material, such as Al, Mg, Cu, brass, bronze or polystyrene, polyurethane (PS, PUR), the foamable material always contains a blowing agent, such as titanium hydrite, which forms a gas when heated and then forms cells to form it Foam structure from the base material is required.
  • a plastic such as, for. B. polystyrene or polyurethane (PS or PUR), or a metal, such as Al or Mg or Ni or Fe or an alloy of these elements, individually or in combination, can be used to produce the foam structure.
  • the strength and the modulus of elasticity of the foam structure holding the component depends not only on the base material but also on the pore structure and generally increases approximately linearly with the bulk density.
  • the parameters when foaming the base materials mentioned are adapted to the respective application in a manner known to the person skilled in the art.
  • the surface or outer skin of the foam structure is closed, compact and not too rough to protect the surface of the component.
  • the foaming temperature is at least in the range of its melting temperature and always below the melting temperature of the component material.
  • a metallic foam structure has the advantage of a higher compressive strength compared to a plastic one.
  • the foamable material can, in particular in the case of a metal as the base material of the foamable material, be provided in a dimensionally stable manner as at least one semi-finished product, preferably by sintering the material with a suitable powdery blowing agent.
  • the semi-finished product can be formed with locally different ratios between base material and blowing agent, so that after foaming, a foam structure with locally different porosities or densities is formed.
  • the more base material is locally present in the semi-finished product compared to the blowing agent the higher the density after foaming and thus the lower the porosity of the foam structure. Since the compressive strength of the foam structure is approximately proportional to its density, foam structures with variable compressive strengths can be produced. Large forces are applied during further processing. In parts of the component, the foam structure holding the component can have a lower porosity and thus a higher density and greater compressive strength than in other places.
  • the semi-finished product For a foam structure with a high density, the semi-finished product must contain a large proportion of e.g. metallic base material compared to the blowing agent.
  • the density of the foam structure can, as is understandable by the person skilled in the art, also be controlled via the ratio of the volume of the semi-finished product to the closed volume for the foamable material in the cassette. A greater play when filling the closed volume with the semi-finished product leads to greater porosity and thus lower density and lower compressive strength.
  • the semi-finished product can be formed or separated from a large-area sheet metal, adapted to the shape and size of the closed volume. For a closed volume, several semi-finished products with different ratios of base material to blowing agent can be combined, whereby a locally differently porous and consequently dense foam structure can be produced.
  • the processing or joining surface does not look at the closed volume during positioning and can be accommodated in a correspondingly shaped recess in the cassette and / or can be positioned protruding from the cassette so that it can be used for subsequent processing, e.g. in a welding or milling machine, is not covered by the foam structure and protrudes from the foam structure and possibly from the cassette.
  • the contact area between the component and the cassette adjacent to the processing or joining surface can be sealed with a soft metal, such as copper or lead, in the form of a ring or strip before foaming in order to compensate for shape or dimensional differences between the component and the cassette in the contact area ,
  • a soft metal such as copper or lead
  • the component held in the foam structure can be assembled with the cassette or alternatively after removing the cassette in a final step directly with the foam structure in a machine for further processing.
  • the component can be positioned in the cassette using a positioning means, such as a threaded pin, which interacts with the surface of the component in such a way that the component is positioned in the cassette without play.
  • the component can also be provided with an attachment with which the component, preferably with a separate fixing means, such as a screw, is positively positioned in the cassette.
  • a blade having a stacking axis, a blade tip and two blade edges lying opposite one another can be provided as a component for a gas turbine.
  • the opposite blade edges can contact the cassette when positioning to form two closed volumes, the steps of filling, foaming and cooling in one embodiment being able to be carried out only for one of the two volumes and in the other volume positioning means interacting with the surface of the component, for example Set screws can be provided, on which the component is pressed after foaming.
  • the paddle can e.g. after casting or forging, with at least one pin projecting coaxially to its stacking axis and from its blade tip and / or its blade root via the blade blade.
  • the pin can be formed with a circular cross section flattened in sections in order to ensure against rotation about the stacking axis when positioning the airfoil in the cassette or following the formation of the foam structure when positioning the airfoil in a processing device or machine.
  • the pin can be received in a correspondingly shaped recess in the cassette during positioning, so that the pin protrudes from the foam structure formed and can be used for positioning during further processing of the airfoil.
  • the method can comprise the further step: assembling the component held in the foam structure with or without a cassette in a machining processing device or a machine.
  • the method can comprise the further steps: assembling the airfoil held in the foam structure with or without a cassette in a processing device or a machine and positioning the airfoil by means of the projecting pin.
  • the second component also generally consists of metal and, in the case of a gas turbine component, generally consists of a Ti or Ni or Co or Fe alloy. Any welding beads that occur during the joining process or small-volume, optional approaches to one of the components, which simplify the positioning in the cassette, can be reworked or removed locally in a subsequent step, e.g. B. by a machining process.
  • the holding device for a metallic component to be connected is generally used for further processing in a machine, e.g. B. a welding or milling machine or a robot.
  • the heating device for heating the foamable material can be designed in a suitable manner depending on the application, for example inductively or by gas.
  • Figure 1 is a sectional, perspective view of a holding device according to the invention with a component held according to the inventive method.
  • FIG. 2 shows a sectional, perspective illustration of an exemplary embodiment of a holding device according to the invention, the component being connected to a further component;
  • 3 shows a perspective illustration of two components connected according to an exemplary embodiment of the method according to the invention and of a component to be connected which is held in an exemplary embodiment of a holding device according to the invention;
  • FIG. 4 shows a representation corresponding to FIG. 3 of another exemplary embodiment of the method according to the invention and a further exemplary embodiment of the holding device according to the invention.
  • the metallic component is an airfoil 1 made of a titanium alloy, which, for. B. is used for a compressor of a gas turbine.
  • the airfoil 1 has an outer surface 2 and a joining surface 3 which is connected to a joining surface of a further component, not shown in FIG. 1.
  • the airfoil 1 additionally has a shoulder 4 with which the airfoil 1 is fixed in the holding device 14 for precise positioning.
  • the extension 4 can also be omitted or can be designed like a flattened pin 19 shown in FIG. 4.
  • the pin 19 extends coaxially to the stacking axis 20 of the airfoil 1.
  • the airfoil 1 has the pin 19 as a result of its manufacturing process, e.g. by forging on.
  • the pin 19 is therefore not additionally provided for carrying out the method according to the invention.
  • the pin 19, which extends coaxially to the stacking axis 20, can be used for the exact positioning of the airfoil 1 in the cassette 5 and also for the positioning of the airfoil 1 relative to another component, such as a rotor carrier, to which the airfoil 1 is to be connected.
  • the holding device 14 comprises a two-part cassette 5 made of steel, which has a recess with an inner surface 6. Along a parting line 22 of the two parts of the cassette 5, a spacer element 21 is provided, which after the heating and foaming Cooling is removed. The two parts of the cassette 5 are then joined in an abutting manner to compensate for any shrinkage of the foam during cooling.
  • the airfoil 1 is positioned in the recess of the cassette 5 in such a way that its joining surface 3 protrudes out of the cassette 5 and its surface 2 is substantially surrounded by the inner surface 6 of the cassette 5, forming a volume 8 which is closed off from the outside.
  • the cassette 5 contacts the airfoil 1 only in a blade region 16 adjoining the joining surface 3 and the shoulder 4 or the pin 19 for more precise positioning.
  • the foamable material 11 is dimensionally stable as a semi-finished product.
  • the shape and size of the two semifinished products forming the foamable material 1 1 are such that they almost completely fill the closed volume 8 between the surface 2 of the airfoil 1 and the inner surface 6 of the cassette 5.
  • the semi-finished products 1 1 are fitted with play.
  • the airfoil 1 can also be clearly fixed to its attachment 4 by means of a screw 10 on the cassette 5.
  • the cassette 5 is closed in such a way that the volume 8 represents a closed volume, ie also in the contact area 16, which is suitably kept tight, for example with a strip or ring of a soft metal such as Cu.
  • the foamable material 11 located in the volume 8 is heated to the foaming temperature, which corresponds approximately to the melting temperature of Al.
  • a gas is formed by the blowing agent, which causes the melted AI to foam.
  • the cassette 5 has an outer surface on each of its two parts on a projection 13 on which the holding device 14 in a suitable machine, such as. B. a welding machine or a robot can be fixed. As shown by the arrows F, z. B. also a force for connecting the airfoil 1 to another component not shown in FIG. 1 can be introduced.
  • a suitable machine such as. B. a welding machine or a robot
  • FIG. 2 shows a sectional, perspective illustration of an airfoil 1 held in a holding device 14, which is connected to a further component in accordance with an exemplary embodiment of the method according to the invention for connecting two components. 2, the airfoil 1 held in the manner described above is not shown in section and one of the two airfoil edges 15 can be seen.
  • the airfoil 1 is connected to a rotor carrier 17 by a gas turbine to form a compressor rotor.
  • the rotor carrier 17 consists of a titanium alloy and has on its circumferential surface a multiplicity of equidistantly spaced joining surfaces 18 which are each connected to an airfoil 1 according to the method according to the invention.
  • the connection of the airfoil 1 held in the holding device 14, as described above, to the carrier 17 takes place by induction welding.
  • the joining surfaces 3 and 18 of the airfoil 1 and the rotor carrier 17 are positioned essentially flush and slightly spaced apart from one another, heated by means of an inductor (not shown) which surrounds the joining plane E circumferentially, and then moved together. This results in only a small weld bead 19, which is finally removed by local reworking.
  • the merely optional attachment 4 of the airfoil 1 is removed after the connection process and the airfoil tip 20 of the airfoil 1 is locally processed.
  • the rotor can be used in a compressor of a gas turbine.
  • a turbine rotor of a gas turbine can be manufactured in a corresponding manner, wherein the components to be connected can always consist of different materials.
  • the blade blade 1 shown in FIG. 2, which has a blade tip 12 and two opposite blade edges 15, can alternatively be positioned in the cassette 5 such that the opposite blade edges 15 contact the cartridge 5 to form two closed volumes 8 ', 8 "
  • the steps of filling, foaming and cooling can only be carried out for one of the two volumes 8 ′ and in the other volume 8 ′′, positioning means 9 interacting with the surface 2 of the component 1 and, unlike in FIG.
  • FIG. 3 shows a perspective view of an airfoil 1 connected to a rotor carrier 17, in which the welding bead 19 as well as the attachment 4 have already been removed.
  • a further airfoil 1 ′ which is held in a holding device 14 and is subsequently connected to the carrier 17, is positioned on a further joining surface 18 ′ of the carrier 17.
  • a spacer element 21 is provided between the two parts of the cassette 5. The spacer 21 can be removed after cooling to form the foam to compensate for any shrinkage of the foam. By moving the two parts of the cassette 5 together when these parts are subsequently connected, the volume 8 is reduced in accordance with the shrinkage. The spacer element 21 can also remain in the joint 22 of the two parts of the cassette 5 during the joining process. In general, all shovel blades first! , 1 'connected to the carrier 17 and subsequently carried out any reworking on welding beads 19 or the like.
  • the airfoil 1 can be connected to the carrier 17 by means of linear friction welding. Due to the rigid connection between the cassette 5 and the airfoil 1 to be connected as a result of the dimensionally stable foam structure, relatively large forces when the joining surfaces 3, 18 are pressed together during oscillation can be transmitted via the airfoil 1 which is almost in its finished form.
  • the airfoil 1 can also have an extension 4 or a pin 19 which extends coaxially to the stacking axis 20 of the airfoil 1 in this method.
  • FIG. 4 shows such a pin 19, which has a flattened circular cross section and thus ensures security against rotation about the stack axis 20.
  • the pin 19 extends from the blade tip 12 away from the airfoil 1.
  • This pin 19, which lies in the stacking axis 20 of the airfoil 1 and protrudes from the foam structure, facilitates the positioning of the airfoil 1 during a subsequent connection process, e.g. by welding, with a further component, such as a rotor carrier 17, which is defined, inter alia, by its axial axis, its diameter or its length.
  • no spacer element 21 is provided along the parting line 22.
  • the pin 19 is positioned in a recess in the cassette 5 and thus protrudes from the foam structure formed in the volume 8.
  • the parting line 22 between the parts of the cassette 5 and thus also in the region of the projecting pin 19 must be tight. Depending on the wall thickness of the cassette 5 and the length of the pin 19, this protrudes from the cassette 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Architecture (AREA)
  • Composite Materials (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour maintenir un élément métallique à assembler, notamment une turbine à gaz. Ledit procédé se caractérise par les étapes suivantes : préparer un élément métallique (1) comportant une surface (2) et au moins une face d'usinage ou d'assemblage (3) ; préparer un coffret (5) muni d'un évidement présentant une surface intérieure (6), pour loger l'élément (1) ; positionner ledit élément (1) dans le coffret (5), de manière que sa surface (2) soit entourée, avec un écart, par la surface intérieure (6) dudit caisson (5), afin de former un volume (8) fermé, et de manière que sa face d'usinage ou d'assemblage (3) ne donne pas sur le volume (8) ; remplir ledit volume (8) avec un matériau apte au moussage (11) ; faire mousser ledit matériau (11) et refroidir de manière à former une structure de mousse indéformable. L'invention concerne également un procédé permettant d'assembler un élément métallique, notamment une turbine à gaz, à un autre élément.
EP03711820A 2002-02-11 2003-02-11 Procede et dispositif pour maintenir un element metallique a assembler et procede pour assembler un element metallique a un autre element Withdrawn EP1474270A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10206447 2002-02-11
DE10206447A DE10206447B4 (de) 2002-02-11 2002-02-11 Verfahren und Vorrichtung zum Halten eines zu verbindenden, metallischen Bauteils und Verfahren zum Verbinden eines metallischen Bauteils mit einem weiteren Bauteil
PCT/DE2003/000392 WO2003068457A1 (fr) 2002-02-11 2003-02-11 Procede et dispositif pour maintenir un element metallique a assembler et procede pour assembler un element metallique a un autre element

Publications (1)

Publication Number Publication Date
EP1474270A1 true EP1474270A1 (fr) 2004-11-10

Family

ID=27635021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03711820A Withdrawn EP1474270A1 (fr) 2002-02-11 2003-02-11 Procede et dispositif pour maintenir un element metallique a assembler et procede pour assembler un element metallique a un autre element

Country Status (5)

Country Link
US (1) US20050205644A1 (fr)
EP (1) EP1474270A1 (fr)
CA (1) CA2475330A1 (fr)
DE (1) DE10206447B4 (fr)
WO (1) WO2003068457A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
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GB0327552D0 (en) * 2003-11-27 2003-12-31 Rolls Royce Plc A method of fabricating or repairing an assembly
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CA2475330A1 (fr) 2003-08-21
US20050205644A1 (en) 2005-09-22
DE10206447A1 (de) 2003-08-28
WO2003068457A1 (fr) 2003-08-21

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