DE102004001262B4 - Method and device for depositing fibers in recesses, in particular in the manufacture of MMC components - Google Patents

Abstract

method for depositing at least one fibrous element (21) into one rotationally symmetrical, open at a radially inner end Recess (23) of a component (24), characterized in that the recess from radially inward with the or each fibrous element (21) filled will that or any fibrous Element centrifugally assisted is stored in the recess (23).

Description

The The invention relates to a method for depositing at least one fibrous element in a recess of a component according to the preamble of the claim 1. Furthermore, the invention relates to a process for the preparation of MMC components according to the preamble of claim 8. Des Furthermore, the invention relates to a device for storing at least a fibrous one Elements in a recess of a component according to the preamble of claim 10.

modern Turbomachinery, especially gas turbines such as aircraft engines, must meet the highest demands in the In terms of reliability, Weight, performance, economy and durability meet. To meet the above requirements for a gas turbine, in particular a Optimized weight of the same, gas turbine components have to be achieved in terms of be optimized to the above requirements. This plays under the selection of materials and the search for new, suitable ones Materials a crucial role.

Out the prior art, it is already known, for weight optimization as a material for gas turbine components so-called fiber-reinforced To use composite materials. Such composites have a Support material which is formed as a metal matrix, as well as in the support material embedded fibers. Such a composite material called also called metal matrix composite - short MMC. At high strength MMC materials using titanium as a substrate Can reduce the weight of components by up to 50% over traditional titanium alloys be reduced. As reinforcements become fibers with high strength and high modulus of elasticity, for example, SiC fibers.

By the DE 694 25 418 T2 For example, there is known a method of making a circular fiber reinforced metal workpiece by inserting into a blank an annular groove open at least in the axial direction, filling it with preforms of fibers and deposited metal, and forging the blank axially and radially centrifugally isothermally , The fiber preforms are made by wrapping binder-coated fibers on a mandrel in a spiraling fashion of increasing diameter. Thereafter, the fibers form self-supporting disc-shaped structures with a circular, central recess.

at the manufacture of MMC components is known in the art usually proceeded so that coated or uncoated Fibers in a desired geometric arrangement can be positioned, the fibers then under high gas pressure and high temperatures to an MMC component or a MMC semi-finished. Should the fibers to Providing the desired geometric arrangement on a body, for example on a annular body, positioned be, so this can be done according to the prior art only Use of the usual Winding technology done. According to the prior art accordingly the fibers like a coil from the outside on such an annular body wound. Fiber layers are in this case radially outward built up. This results in the problem that the fibers, for example not arranged in such recesses of an annular body can be which are open at a radially inner end. Did you want here the usual Apply winding technique, so would the fibers pulled out of the recess during winding again. Overall, therefore, there is a lack of a suitable approach to arrange fibers in recesses of components, in particular are open at a radially inner end of the component.

Of these, Based on the present invention, the problem underlying a novel method and a corresponding device for Place at least one fibrous one To propose elements in a recess of a component. Farther it is within the meaning of the invention, a novel method for the production of MMC components.

This Problem is solved by that the aforementioned method for storing at least one fibrous Elements in a recess of a component by the characteristics of the characterizing Part of claim 1 is further developed. Inven tion is the Recess of radially inward such with the or each fibrous element filled, that or each fibrous Element centrifugally assisted is stored in the recess.

To An advantageous development of the invention is the or each fibrous Element unwound from a rotating driven roller and in the recess of the likewise rotationally driven component stored centrifugally supported, where to be filled Recess of the component surrounds the role radially outside.

The or each fibrous element is unwound from the roll at an angular velocity which is greater than the angular velocity of the component to be filled. The or each unwound from the roll, fibrous element is brought by a feeder to the recess to be filled of the component.

The inventive method for the production of MMC components is defined in the independent claim 8. The device according to the invention for depositing at least one fibrous element in a recess a component is independent Claim 10 defined.

preferred Further developments of the invention will become apparent from the dependent claims and the following description. Embodiments of the invention without being limited to this to be closer to the drawing explained. Showing:

1 a highly schematic section of a rotationally symmetrical component of a gas turbine in cross section;

2 a highly schematic section of a rotationally symmetrical MMC component of a gas turbine in cross section;

3 a schematic diagram of a device according to the invention for depositing at least one fibrous element in a recess of a component according to 2 together with the component according to a first embodiment of the invention;

4 the detail IV of the 3 ;

5 a partial cross section through the arrangement of 3 in the cutting direction VV the 3 ;

6 a schematic diagram of a device according to the invention for depositing at least one fibrous element in a recess of a component together with the component according to a second embodiment of the invention;

7 a partial cross section through the arrangement of 6 in a cutting direction analogous to 5 ; and

8th the detail VIII of the 7 ,

1 shows a fragmentary cross section through an integrally bladed rotor 10 According to the state of the art. So shows 1 a rotor disk 11 and one to the rotor disk 11 subsequent blade 12 of the rotor. About the circumference of the rotor 10 or the rotor disk 11 are several such blades 12 arranged. Such rotors 10 especially in the hub area 13 the rotor disk 11 heavily loaded by centrifugal forces, so they especially in the hub area 13 to provide the required strength values over large cross sections. This increases the weight of the rotors 10 According to the state of the art.

For weight reduction of such rotors of the rotor 14 according to 2 proposed. The rotor 14 according to 2 has as well as the rotor 10 according to 1 over a rotor disk 15 and several along the circumference of the rotor disk 15 arranged blades 16 , In a hub area 17 is the rotor 14 according to 2 executed in so-called MMC technology. In the metallic matrix material of the rotor disk 15 For this purpose tensile fibers are embedded. The area in which the tensile fibers in the rotor disk 15 are embedded in the 2 with the reference number 18 characterized. As 2 can be taken, begins this MMC area 18 at a radially inner end 19 of the rotor 14 or the rotor disk 15 the same, and tapers in the radial direction to the outside. With such a MMC-engineered rotor 14 can the hub area 17 the rotor disk 15 much slimmer and therefore easier to run than in the 1 shown rotor 10 , Such rotors 14 in MMC design can be compared to conventional rotors 10 be built lighter and rotate faster.

In known from the prior art method for the production of MMC components, the procedure is that tensile-strength fibers are wound around a core, wherein the fiber layers are built radially outward. On the other hand, should the in 2 shown rotor 14 must be made, so must the MMC area 18 corresponding recess are filled from the inside radially with fibers, which means that the recess is filled starting from the radially outer end thereof, so the fiber layers must be constructed radially inwardly. The known from the prior art procedures are therefore not suitable for such components. It is therefore within the meaning of the present invention to propose a method and apparatus for depositing at least one fiber, which in particular the in 2 shown rotor 14 can be produced.

The following is with reference to 3 to 5 a first embodiment of a device according to the invention for depositing fibers described in particular in the manufacture of an MMC component according to 2 USAGE it becomes.

At the in 3 schematically illustrated device 20 becomes a fiber 21 from a roll 22 unwound and in a rotationally symmetrical recess 23 a component 24 stored. The laying of the fiber 21 in the recess 23 of the component 24 takes place according Zentrifugalkraftunterstützt or centrifugally assisted. This will be the role 22 in the sense of the arrow 25 driven in rotation, wherein the component 24 in the sense of the arrow 26 also rotated. The rotating component 24 encloses the rotating roller 22 from which the fiber 21 is unwound, radially outward. That means the role 22 inside the component 24 is arranged and so centrifugally assisted the recess 23 from the inside with the fiber 21 is filled.

In addition to the role 22 includes the device according to the invention 20 furthermore a feeder 27 to get rid of the role 22 unwound fiber 21 in the area of the recess 23 to lead into which the fiber 21 is to be stored. The feeder 27 is in 4 shown enlarged, with two guide legs 42 and 43 a leadership area 44 for the fiber 21 define. The feeder 27 rotates on the one hand relative to the rotating component 24 and on the other hand relative to the rotating roll 22 , In addition to this rotational movement, the feeder leads 27 continue in the sense of in 5 shown double arrow 28 a movement perpendicular to the direction of rotation, around the recess 23 controlled with several layers 29 made of fibers 21 to fill.

10

rotor

11

rotor disc

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blade

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hub area

14

rotor

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rotor disc

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blade

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hub area

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MMC area

19

The End

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contraption

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fiber

22

role

23

recess

24

component

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arrow

26

arrow

27

feeding

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double arrow

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location

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monitoring device

31

boundary wall

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boundary wall

33

contraption

34

feeding

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pinch

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recess

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carrier

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arrow

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arrow

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arrow

41

groove

42

guide leg

43

guide leg

44

guide region

Claims (15)

Method for depositing at least one fibrous element ( 21 ) in a rotationally symmetrical, at a radially inner end open recess ( 23 ) of a component ( 24 ), characterized in that the recess from radially inward so with the or each fibrous element ( 21 ) is filled, that the or each fibrous element is centrifugally assisted in the recess ( 23 ) is stored. Method according to claim 1, characterized in that the or each fibrous element ( 21 ) of a rotationally driven roller ( 22 ) and in the recess ( 23 ) of the likewise rotationally driven component ( 24 ) is stored, wherein the recess to be filled ( 23 ) of the component ( 24 ) the role ( 22 ) encloses radially. Method according to claim 2, characterized in that the or each fibrous element ( 21 ) of the role ( 22 ) is unwound at an angular velocity which is greater than the angular velocity of the component to be filled ( 24 ). Method according to claim 2 or 3, characterized in that the or each of the rollers ( 22 ) unwound, fibrous element ( 21 ) from a feeder ( 27 . 34 ) to the recess to be filled ( 23 ) of the component ( 24 ). Method according to claim 4, characterized in that the feeding device ( 27 . 34 ) during fiber deposition transverse to the direction of rotation of the component ( 24 ) is moved back and forth. Method according to one of claims 1 to 5, characterized in that the laying down of the or each fibrous element ( 21 ) in the recess ( 23 ) is monitored and regulated as a function thereof. A method according to claim 6, characterized in that for this purpose a monitoring device ( 30 ) synchronously with the feeder ( 27 . 34 ) be is moved. Method for producing MMC components, in particular of components for a turbomachine, with the following steps: a) Provide a component of metallic matrix material with a radial inner portion and a radially outer portion, b) Introducing at least one groove-like recess in the radial inner portion of the component, wherein the or each recess is open at a radially inner end, c) filling the or any groove-like recess from radially inward with at least a tensile fiber, wherein the or each fiber supports centrifugal force in the Recess is deposited, d) compacting the component from metallic Matrix material and the or each tensile fibers by pressure at high temperature. Method according to claim 8, characterized in that that depositing the or each fiber into the recess of the component according to the measures of a the claims 1 to 7 performed becomes. Device for depositing at least one fibrous element ( 21 ) in a rotationally symmetrical, at a radially inner end open recess ( 23 ) of a component ( 24 ), characterized by means for filling the recess ( 23 ) with the or each fibrous element from radially inward, such that the or each fibrous element ( 21 ) centrifugally assisted in the recess ( 23 ) can be stored. Apparatus according to claim 10, characterized in that the means a rotationally driven roller ( 22 ), wherein the or each fibrous member is unwound from the roll, and wherein the roller is radially enclosed by the also rotatably driven member. Apparatus according to claim 11, characterized in that the angular velocity with which the or each fibrous element ( 21 ) of the role ( 22 ) is greater than the angular velocity of the component to be filled ( 24 ). Apparatus according to claim 11 or 12, characterized in that the means comprises a feed device ( 27 . 34 ), wherein the feeding device ( 27 . 34 ) the or each of the roll ( 22 ) unwound, fibrous element ( 21 ) to the recess to be filled ( 23 ) of the component ( 24 ) introduce. Apparatus according to claim 13, characterized in that the feed device ( 27 . 34 ) during fiber deposition transverse to the direction of rotation of the component ( 24 ) is reciprocable. Device according to one of Claims 10 to 14, characterized by a monitoring device ( 30 ) to monitor the deposition of the or each fibrous element in the recess.