WO2009100709A1

WO2009100709A1 - Method and device for surface peening a component

Info

Publication number: WO2009100709A1
Application number: PCT/DE2009/000170
Authority: WO
Inventors: Philipp THÜMMLER; Thomas Peschke; Hans Öttl; Karl-Heinz Hüttner
Original assignee: Mtu Aero Engines Gmbh
Priority date: 2008-02-14
Filing date: 2009-02-07
Publication date: 2009-08-20
Also published as: DE102008011243A1

Abstract

The invention relates to a device for surface peening a component (10), particularly of a power unit, comprising a peening chamber (16), which has at least one opening (20) for the component (10) and within which peening means (28) for impinging a corresponding surface region (22) of the component (10) can be accelerated, wherein in the region of the opening (20) of the peening chamber (16) at least one peening chamber wall (24, 26) for adjoining the component (10) at a corresponding distance (a) is configured, wherein on the peening chamber wall (24, 26) at least in some regions a sealing device (36) is provided toward the component (10), said sealing device being adaptable to the varying distance (a) between the peening chamber wall (24, 26) and the component (10). The invention further relates to a method for surface peening a component (10) using such a device.

Description

Apparatus and method for surface blasting of a component

description

The invention relates to a device for surface blasting of a component, in particular of an engine specified in the preamble of claim 1. Art Furthermore, the invention relates to a method for surface blasting of such a component specified in the preamble of claim 9 Art. 0 When surface blasting of components for engines For example, for wheels

(Blisk) or for disks (disk), today corresponding devices are used with a blasting chamber, which have at least one opening for the respective component. In the region of this opening, the component can be positioned relative to the blasting chamber, so that a closed space is created by the blasting chamber itself and the component area of the component to be solidified, within which blasting agent, in particular steel balls, can be accelerated to impinge a corresponding surface area of the component. This acceleration usually takes place by means of a vibration device which, for example, comprises a sonotrode.

o A problem in the case of the previous devices or the associated method for surface blasting is the fact that between a blasting chamber wall provided in the region of the blasting chamber and the adjacent component region of the component there is a corresponding gap when the component is positioned, and the blasting chamber arises relative to each other, which must be chosen so far, 5 that no blasting agent can escape. In order to avoid such an escape of blasting agent, the intermediate space or the intermediate gap between the component and the corresponding blasting chamber wall is usually designed so that it is smaller than the diameter of the blasting agent, in particular the steel balls. However, this requires that the gap or its gap during the surface o radiate be about constant and less than the ball diameter of the steel balls must to constantly avoid the loss of blasting media out of the blasting chamber. This is particularly a problem when the corresponding component, such as the impeller (Blisk) or the running disk (disk) is rotated according to the surface treatment. Then it can namely come to a change in the distance between the respective blasting chamber wall and the component, which can thus lead to a loss of blasting agent or to pinching the balls, in which the balls at least temporarily jammed between the component and the blasting chamber wall.

Another problem is when the respective radiant chamber wall is adjacent to component regions of the component in which openings, depressions or Aufmassbereiche are provided. Then, in turn, there is a changing distance between the respective blasting chamber wall and the component, which may possibly lead to the loss of blasting abrasive during surface blasting.

Object of the present invention is therefore to provide a device and a method of the type mentioned, by means of which a loss of blasting agent can be prevented in an improved manner.

This object is achieved by a device and a method with the

Characteristics of the claims 1 and 9 solved. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the respective dependent claims.

In order to prevent loss of blasting agent in surface blasting in an improved manner, it is provided in the apparatus according to the invention that a sealing device is provided on the blasting chamber wall at least in regions, which can be adapted to a changing distance between the blasting chamber wall and the component. In other words, it is provided according to the invention to provide, at least in some areas, between the blasting chamber or an associated blasting chamber wall and the component, a sealing device in order thereby to produce a corresponding one Cover gap between the blasting chamber and the component and to avoid loss of blasting agent. Namely, this loss of blasting agent is particularly due to the fact that the distance between the respective blasting chamber wall and the component varies correspondingly and consequently can not be set uniformly.

By means of the sealing device according to the invention, however, in particular it is achieved that a changing intermediate space or distance between the respective blasting chamber wall and the component remains covered in such a way that no blasting agent can escape from the blasting chamber. This is achieved by a correspondingly adaptable sealing device, which will be described in greater detail below by way of example.

By the inventively adaptable to a changeable distance between the blasting chamber wall and the component sealing device is achieved in particular that, for example components in the form of impellers (Blisk) or pulleys (disk) of engines and at transitions to holes, recesses, openings, depressions or the like and / or can be sealed particularly well to the respective blasting chamber in Aufmaßbereiche of the component. In particular, in these areas, variable gaps or gaps between the respective blast chamber wall and the component, which make a flexible sealing system or a customizable sealing device necessary.

Within the scope of the invention, it is to be considered that in the simplest case, the sealing device can be provided only in those areas in which the distance between the blasting chamber wall and the component can change. A particularly advantageous embodiment, however, provides that the blasting chamber is completely or circumferentially provided with a corresponding sealing device to allow a particularly favorable seal towards the component.

In a further embodiment of the invention, it has been found to be advantageous if the

Sealing device for adapting to the changing distance between the jet Chamber wall and the component at least one sealing element made of a flexible material, in particular a plastic material comprises. Thus, the adaptation of the sealing means to the variable gap by the flexible sealing member, which consists for example of a rubber or the like, can be easily achieved 5.

It has proven to be particularly advantageous if the sealing element is designed as a flexible sealing lip, a flexible sealing wiper or as a flexible shaping brush. Such flexible sealing elements have a high wear resistance and ensure in a particularly reliable way that a changing distance or gap between the blasting chamber and the component always remains closed.

If the sealing element is fixedly arranged on the blasting chamber wall, the result is a particularly cost-effective arrangement of the sealing element or a particularly cost-effective sealing device. The adaptation of the sealing device to the changing distance or gap between the blasting chamber wall and the component then takes place essentially by a correspondingly flexible sealing element.

In a further embodiment of the invention, it has proven to be further advantageous if o the sealing element is arranged movable relative to the blasting chamber wall. Thus, such a sealing element is particularly suitable for the compensation of a strongly changing or greatly different distance between the respective blasting chamber wall and the associated component. It is clear that, if necessary, a sealing element could be used, which is arranged on the one hand relatively movable to the blast chamber wall 5 and on the other hand designed to be flexible, thereby a particularly favorable adaptation of the sealing device to a varying distance between the blasting chamber wall and the associated Reach component.

Finally, it has proved to be advantageous in the device according to the invention, o when a holding device is provided, by means of which the component relative to the

Blasting chamber is durable. This allows a particularly reproducible beam result be achieved in surface blasting. In addition, the holding device is particularly well when the component is to be rotatably supported by means of the holding device about an axis of rotation. As in the scope of the invention, however, it is to be considered that it would possibly also be conceivable not to arrange the component relative to the blasting chamber, but rather to design the blasting chamber as a mobile unit, which is then arranged relative to the respective component. In any case, by means of the sealing device, however, an at least partially covering a gap between the blasting chamber wall and the component can be achieved, so that no blasting agent can escape from the blasting chamber. 0

Overall, it can thus be seen that by means of the sealing device, an escape of blasting agent can be prevented in order to achieve a highly reproducible result in surface blasting and, for example, "ball squeezer", ie the setting or clamping of blasting agent between the respective blasting chamber wall 5 and the associated component , to prevent.

The advantages described above in connection with the device according to the invention apply equally to the method according to the invention.

o Further advantages, features and details and the invention will become apparent from the following description of preferred exemplary embodiments and with reference to the drawings. These show in:

1 is a schematic perspective view of a component of an engine in the form of a blisk, the surface of which is solidifiable in a radially inner region by means of a surface-blasting device schematically indicated, wherein the device for surface blasting essentially comprises a blasting chamber and a holding device of the Component are shown relative to the blasting chamber, wherein the component is rotatably supported by means of the holding device o about a rotational axis; 2 shows a sectional view through the component in the form of the impeller (blisk) and through the blasting chamber according to the device for surface blasting according to FIG. 1, wherein a sealing device is provided between the respective blasting chamber walls and the surface area of the component to be acted upon by blasting medium, which device changes to a changing one Distance between the respective

Steel chamber wall and the component is adaptable;

Figure 3 is a fragmentary and enlarged sectional view of the component in the form of

Impeller (Blisk) and the sealing device according to the detail III in Figure 2, wherein in the present case, the sealing means comprises a fixedly arranged on the associated blasting chamber wall sealing element in the form of a flexible sealing lip, a flexible sealing wiper, a flexible mold brush or the like; and in

Figure 4 is a fragmentary and enlarged sectional view of the component in the form of

Impeller (blisk) and the sealing device according to the detail IV in Figure 4 in an alternative embodiment, wherein the sealing means comprises a sealing element which is arranged relatively movable on the associated blasting chamber wall.

FIG. 1 shows a schematic perspective view of a component of an engine in the form of an impeller 10 (blisk). The impeller 10 accordingly comprises a running disk 12, which is provided on the outer peripheral side with a plurality of radially projecting and integrally formed air vanes 14.

From a device for surface blasting of a present radially inner component region of the impeller 10, a blasting chamber 16 and a holding device 18 for relative positioning of the impeller 10 relative to the blasting chamber 16 are shown schematically in FIG. By means of the holding device 18 while the impeller 10 is held not only relative to the blasting chamber 16, but also about a rotation axis D. rotatably mounted. In this way, in the present case, the radially inner component region of the impeller 10 can be surface-blasted or solidified in a radially circumferential manner.

In Figure 2, the impeller 10 and the blasting chamber 16 are each shown in a schematic sectional view. It can be seen that the blasting chamber 16 has an approximately slot-shaped opening 20 for the impeller 10, through which the impeller 10 protrudes with a corresponding radiating surface area 22 in the blasting chamber 16. The opening 20 of the blasting chamber 16 is bounded laterally by a respective blasting chamber wall 24, 26.

It can thus be seen from FIG. 2 that the blasting chamber 16, together with the impeller 10, forms a closed space within which blasting means 28 -in the present example in the form of steel balls-is located. This blasting agent 28 is accelerated by means of a vibration device 30, which is arranged on one side of the blasting chamber 16.

In the present case, the vibration device 30 comprises a sonotrode 32 with a correspondingly vibratable surface 34, which forms a boundary wall of the blasting chamber 16. The sonotrode 32 is to be vibrated accordingly in such a way that the blasting agent 28 can accelerate or be set in motion to act on the corresponding surface region 22 of the impeller 10.

Furthermore, it can be seen that the respective blasting chamber walls 24, 26, which adjoin the impeller 10, are formed at a corresponding distance a from this. In the present case, this is necessary in particular because the impeller 10 has to be rotated about the axis of rotation D (FIG. 1) so that the corresponding surface region 22 can be hardened or hardened radially all around.

For example, during rotation of the impeller 10, the distance a between the associated blasting chamber wall 24, 26 and the impeller 10 changes. In other words, the width or a gap of a gap 35 varies between the respective blasting Chamber wall 24, 26 and the impeller 10. Also, the distance a or the intermediate space 35 may vary in that corresponding recesses, openings, depressions or the like and / or a Aufmaßbereich of the impeller 10 to the respective blasting chamber wall 24, 26 is provided.

For this reason, a sealing device 36 is at least partially provided between the respective blasting chamber wall 24, 26 and the impeller 10, which is adaptable to the changing distance a between the respectively associated blasting chamber wall 24, 26 and the impeller 10. In this way - as will be explained in more detail below - in particular a discharge of blasting agent 28 from the blasting chamber 16 out or jamming of blasting agent 28 between the respective blasting chamber wall 24, 26 and the impeller 10 is prevented.

FIGS. 3 and 4 show detail III and IV respectively in FIG. 2 in a detail and enlarged sectional view, with FIGS. 3 and 4 showing two alternative embodiments of the respective sealing device 36.

The sealing device 36 according to FIG. 3 in this case comprises a sealing element 38 which, for adaptation to the changing distance a between the blasting chamber wall 24 and the impeller 10, is made of a flexible material, in particular a plastic material or

Rubber material, consists. In the present case, it can also be seen that the sealing element 38 is designed as a flexible sealing lip, flexible sealing wiper, flexible shaping brush or the like. In this case, the respective sealing element 38 may be formed both one or more parts.

In addition, it can be seen from FIG. 3 that, in the present case, the sealing element 38 is fixedly arranged on the associated blasting chamber wall 24. In other words, an adaptation of the sealing device 36 or of the sealing element 38 at a changing distance a between the associated blasting chamber wall 24 and the impeller 10 is achieved, in particular, by the material of the sealing element 38 being shaped correspondingly flexibly. tet is. This essentially ensures that the sealing element 38 always remains in contact with the impeller 10 or its radiating surface region 22.

The embodiment according to FIG. 4, on the other hand, provides a sealing element 40, which is arranged to be relatively movable on the associated jet chamber wall 24. In Figure 4, this is symbolically represented by a slot 42 within the blasting chamber wall 24, in which the sealing element 40 can more or less submerge, depending on which distance a is present between the associated blasting chamber wall 24 and the impeller 10. In this case, the sealing element 40 may be pressed, for example by means of a spring element against the impeller 10, thereby always to achieve a contact between the sealing element 40 and the impeller 10 and its surface region 22 to be solidified. The sealing element 40 may optionally consist of a non-flexible material. However, it is particularly advantageous, although in the present case a sealing element 40 made of a flexible material, in particular a plastic or rubber material is used, as this has already been described in connection with the embodiment of Figure 3. In other words, thus, the sealing element 40 may in turn be designed, for example, as a sealing lip, sealing wiper or mold brush, the plastic brushes, for example, then act as a kind of broom.

As already explained, the sealing elements 38, 40 according to both embodiments may be provided only locally between the respective blasting chamber wall 24, 26 and the impeller 10, for example, in particular, in areas in which the impeller 10 is a recess, opening, recess or the like and / or has a Aufmaßbereich. On the other hand, a particularly preferred embodiment provides that the respective sealing elements 38, 40 are provided in the region of the entire opening 20, that is to say peripherally.

Overall, it can thus be seen from the figures that by means of the present sealing device 36 a sealing system can be created by means of which tolerance fluctuations or fluctuations in the distance a between the respective blasting chamber wall 24,

26 and the impeller 10 can be particularly well received. In particular, you can Thus, rotation-related fluctuations of the distance a between the respective blasting chamber wall 24, 26 and the impeller 10 are compensated. As a result, an escape of blasting agent 28 or jamming in the intermediate space 36 is avoided.

As is included in the scope of the invention, it should be considered that the device can be provided both as a stationary unit, in which the impeller 10 is arranged relative to the blasting chamber 16 by means of the holding device 18. Likewise, it would also be conceivable to design the device as a mobile unit, which is then arranged opposite a fixedly positioned impeller 10.

It is clear that the present device for surface blasting can also be used with other components, in particular also with running disks (disk) of engines. Thus, a method can be realized by the present device, in which initially the impeller 10 is introduced into the opening 20 of the blasting chamber 16 in such a way that the respective distance a remains between the blasting chamber walls 24, 26 and the impeller 10 , The resulting intermediate space 36 between the respective blasting chamber wall 24, 26 and the component in the form of the impeller 10 is covered by the at least partially provided sealing means 36, after which an acceleration of the blasting means 28 for applying the corresponding surface region 22 of the impeller 10 within the blasting chamber 16 can be done.

Claims

claims

1. Apparatus for surface blasting of a component (10), in particular of an engine, with a blasting chamber (16), which has at least one opening (20) for the

5 component (10) and within which blasting means (28) for applying a corresponding surface region (22) of the component (10) can be accelerated, wherein in the region of the opening (20) of the blasting chamber (16) at least one blasting chamber wall (24, 26) for the adjoining of the component (10) at a corresponding distance (a) is formed, characterized in that at least partially sealing means (36) is provided to the component (10) on the Strahlkammerwand0 (24, 26), which at a changing distance (a) between the blasting chamber wall (24, 26) and the component (10) is adaptable.

2. Apparatus according to claim 1, characterized in that the Dichtungseinrich-5 device (38) for adaptation to the changing (lθ) at least one sealing element (38,

40) made of a flexible material, in particular a plastic material.

3. Apparatus according to claim 2, characterized in that the at least one sealing element (38, 40) as a flexible sealing lip, flexible sealing wiper, flexible mold o brush or the like. Is formed.

4. Device according to one of claims 2 or 3, characterized in that the sealing element (38, 40) fixed to the jet chamber wall (24, 26) is arranged.

5 5. Device according to one of claims 2 or 3, characterized in that the

Sealing element (38, 40) is arranged movable relative to the blasting chamber wall (24, 26).

6. Device according to one of claims 1 to 5, characterized in that the sealing device (36) vorgese¬ in a region of the blasting chamber wall (24, 26)

ll hen in which this adjacent to a recess, opening, recess or the like. And / or a Aufmaßbereich of the component (10).

7. Device according to one of claims 1 to 6, characterized in that a holding device (18) is provided, by means of which the component (10) relative to the

Blasting chamber (16) is durable.

8. The device according to claim 7, characterized in that the component (10) by means of the holding device (18) about an axis of rotation (D) is rotatably mounted.

9. A method for surface blasting of a component (10), in particular of an engine, with the steps:

- Relative positioning of the component (10) in the region of at least one opening (20) of a blasting chamber (16) and at a corresponding distance (a) see between at least one blasting chamber wall (24, 26) and the component (10);

- accelerating the blasting means (28) for impinging a corresponding surface area (22) of the component (10) within the blasting chamber (16); characterized by the step:

- Covering an intermediate space (35) between the blasting chamber wall (24, 26) and the component (10) by means of at least partially provided, to a changing distance (a) between the blasting chamber wall (24, 26) and the component (10) adaptable Sealing device (36).

10. The method according to claim 9, characterized in that the intermediate space (35) between the blasting chamber wall (24, 26) and the component (10) by means of a sealing element (38, 40) made of a flexible material, in particular a plastic material, covered.

11. The method according to claim 10, characterized in that the intermediate space (38, 40) between the blasting chamber wall (24, 26) and the component (10) by means of a Sealing element (38, 40) in the form of a flexible sealing lip, a flexible sealing wiper, a flexible mold brush or the like. Is covered.

12. The method according to any one of claims 10 or 11, characterized in that the sealing element (38, 40) for adaptation to the changing distance (a) between the

Blasting chamber wall (24, 26) and the component (10) relative to the blasting chamber wall (24, 26) is moved.

13. The method according to any one of claims 9 to 12, characterized in that the intermediate space (35) between the blasting chamber wall (24, 26) and the component (10) in a region of a recess, opening, recess or the like and / or a Aufmaßbereich of the component (10) is covered.

14. The method according to any one of claims 9 to 13, characterized in that component (10) relative to the blasting chamber (16) by means of a holding device (18) is held.

15. The method according to claim 14, characterized in that the component (10) by means of the holding device (18) about an axis of rotation (D) is rotated.