EP4061577A1

EP4061577A1 - Flow lapping device for smoothing a surface of a workpiece

Info

Publication number: EP4061577A1
Application number: EP20810889.4A
Authority: EP
Inventors: René Tropschuh
Original assignee: Am Metals GmbH
Current assignee: Am Metals GmbH
Priority date: 2019-11-18
Filing date: 2020-11-17
Publication date: 2022-09-28
Also published as: CN114728398A; WO2021099319A1; DE102019131050A1; US20220388110A1

Abstract

The invention relates to a flow lapping device for smoothing at least one surface of at least one workpiece (11), preferably an impeller, by means of an abrasive fluid (26), comprising at least one holding device (10) for holding the workpiece (11), in particular at least one holding plate, and at least one encasing device (12) which is arranged about the holding device (10) and within which the fluid can flow, wherein the holding device (10) is supported, in particular fixed, at least partly by at least one inner wall section (19) of the encasing device (12).

Description

Flow lapping device for smoothing a surface of a workpiece

description

The invention relates to a flow lapping device for smoothing a surface of a workpiece, a system for assembling a flow lapping device, an arrangement comprising at least one flow lapping device, a method for assembling a flow lapping device, a method for assembling an arrangement with at least one flow lapping device and a method for smoothing at least of a workpiece.

Flow lapping devices for smoothing a surface of a workpiece are known in principle. DE 103 09 456 A1, for example, describes a device for pressure flow lapping which has at least two opposing pressure devices, the workpiece to be processed being arranged between the opposing pressure devices, and where a lapping means can be moved past the workpiece to be processed. With the help of a special device, the workpiece to be processed is positioned between the two printing devices and clamped between them. A similar solution is shown in WO 2015/053868 A1.

However, such concepts are considered to be in need of improvement with regard to assembling or mounting the workpiece and also with regard to safety-related aspects. It is therefore the object of the invention to propose a flow lapping device which can be prepared in the simplest possible manner for the comparatively safe performance of the flow lapping process for the workpiece to be smoothed. The flow lapping process as such should preferably be able to be carried out comparatively effectively. A further object of the invention is to provide a corresponding system for assembling a flow lapping device, a corresponding arrangement comprising at least one flow lapping device, a corresponding method for assembling a flow lapping device, a corresponding method for assembling an arrangement with at least one flow lapping device and a corresponding method for smoothing at least of a workpiece.

This object is achieved in particular by the features of claim 1.

In particular, the object is achieved by a flow lapping device for smoothing at least one surface (preferably at least one inner surface or at least one surface of a flea space) of at least one workpiece, preferably an impeller, by means of an abrasive fluid, comprising at least one folding device (for holding the workpiece), in particular comprising at least one holding plate (or formed by at least one or exactly one holding plate), as well as at least one wrapping device arranged around the folding device (circumferential), within which the fluid can flow, wherein the folding device is at least partially supported by at least one (or on) at least one) inner wall section of the wrapping device is supported (or held), in particular fixed. The wrapping device is preferably partially or completely (circumferentially) arranged around an outer or (in the radial direction) outermost (circumferential) edge of the folding device or holding plate.

One idea of the invention is to arrange a wrapping device around a correspondingly provided folding device or holding plate (for holding the workpiece) which is used to also support or fix the folding device. As a result, a flow lapping device can be set up in a simple manner for carrying out the flow lapping process, with a comparatively high level of safety during flow lapping being achieved in particular by the folding device or holding plate (and thus the workpiece) is shielded on the circumferential side, so that in particular it is prevented or at least (further) made more difficult that abraded particles (grains) and / or grinding medium escape into the environment.

The above-mentioned object is achieved according to an independent (or possibly also further developing) aspect in particular by a flow lapping device for smoothing at least one surface of at least one workpiece, preferably an impeller, by means of an abrasive fluid, comprising at least one folding device, in particular component platform (for holding the Workpiece), preferably comprising at least one holding plate (or formed by at least one or precisely one holding plate), at least one wrapping device (circumferentially) arranged around the folding device, within which the fluid can flow, and at least one fluid-conducting device (provided separately from the wrapping device) (in particular fluid guide insert), which is arranged or can be arranged within the wrapping device, in particular used or can be used, in order to divert the fluid at least regionally within the wrapping device. The wrapping device is preferably arranged (circumferentially) around an outer or outermost (circumferential) edge of the folding device or holding plate.

The at least one fluid guide device (the at least one fluid guide insert) is preferably configured such that the fluid, when it flows in the direction of the workpiece, is guided to at least one opening in the workpiece. Alternatively or additionally, the at least one fluid guide device (or possibly a further fluid guide device) can also be configured such that the fluid, when it flows in the direction of the workpiece, flows against an (inner and / or outer) surface of the workpiece.

A further idea of the invention is therefore in particular to arrange the folding device (holding plate) within a wrapping device, and at the same time also to arrange a (separate) fluid-guiding device within the wrapping device, which can cause the fluid to be particularly effective due to its guiding or diversion of the fluid applied to the surfaces that are ultimately to be smoothed. This enables effective smoothing to take place in a simple manner. A wrapping device is to be understood as meaning, in particular, a device that envelops (encases) the holding device (holding plate) and in particular also the workpiece (if it is arranged within the flow lapping device) on the circumferential side. In particular, the holding device (holding plate) and possibly also the workpiece should be shielded to the side (laterally or circumferentially) by the wrapping device (i.e. especially when the flow lapping device is ready for operation in directions that are at least essentially horizontal and / or in directions which are at least substantially perpendicular to a direction of movement of a first and / or second printing device, in particular printing cylinder, or the like). If the holding device (holding plate) extends over a total height X, the holding device (holding plate) should preferably be wrapped (encased) over a height that is at least 0.3 * X, preferably at least 0.6 * X, more preferably at least 0.8 * X corresponds.

The wrapping device can (in the general sense) form a cylinder, for example with a round, in particular circular, or polygonal, in particular square or hexagonal or octagonal radial section.

Support by at least one inner wall section of the wrapping device is to be understood in particular to mean that the corresponding inner wall section at least partially contributes (possibly completely causes) that the holding device (holding plate) remains (is held), in particular at a certain height. For this purpose, the inner wall section can, for example, have at least one corresponding recess (e.g. groove, preferably annular groove) and / or at least one corresponding projection and / or at least one corresponding step (as an example of a holding structure). A fixation is to be understood in particular to mean that the holding device (holding plate) is at least partially (possibly completely) held in place at a specific location by the corresponding inner wall section of the wrapping device. In particular, this also includes a fixation against lifting (for example in the case of compressive forces from below). The holding structure of the inner wall section is preferably integrally molded or shaped in the wrapping device or the inner section thereof. The holding device is preferably formed separately (non-monolithically or not in one piece) with respect to the wrapping device and / or is formed from a different material than the wrapping device.

At least one outer edge (an outer edge) of the holding device or holding plate preferably rests directly on the supporting or fixing inner wall section of the wrapping device.

The fluid guide device (in particular a fluid guide device or fluid guide device) preferably comprises a fluid guide insert or is formed by such an insert. A fluid guide insert is to be understood in particular as an insert which is or can be used as a separate component in the encasing device. The fluid-conducting device (or the fluid-conducting insert) preferably does not constitute a seal to the outside (such as, in particular, the enveloping device, which preferably provides such a seal). In particular, the fluid guide device (or the fluid guide insert) should not define an outer wall that delimits a volume in which the abrasive fluid is located or can flow from the outside. The (respective) fluid guiding device can optionally be a one-piece, in particular monolithic body. The (respective) fluid guide device (fluid guide insert) can be formed at least in sections, if necessary completely, from plastic and / or metal and / or ceramic.

The workpiece is preferably an impeller and / or has: an at least substantially round cross section and / or a cylindrical outer surface and / or at least one, possibly exactly one, central opening, in particular on a base, and / or at least one radially oriented Opening (preferably at least two or at least four radially oriented openings), in particular on / on a cylindrical outer surface.

Alternatively or additionally, the workpiece is not a wire guide element or at least not a printing wire guide member. Alternatively or in addition, the workpiece is not a wing or at least not an airfoil. Alternatively or additionally, several workpieces (in the flow lapping device) do not form a wing group or at least no wing group (airfoil cluster). In embodiments, the flow lapping device is not configured to receive a wire guide element and / or a printing wire guide member as a workpiece and / or to receive a wing and / or wing (airfoil) and / or to receive a wing group and / or a wing group (airfoil cluster) .

The enveloping device preferably comprises at least a first (preferably one-piece, in particular monolithic), in particular lower, and a second (preferably one-piece, in particular monolithic), in particular upper, enveloping part. The (two or) more enveloping parts can be aligned with one another on at least one outer and / or inner side, in particular so that no step is formed between the respective enveloping parts (in particular in the sense that no step is formed that is only caused by an offset between the respective outer sides or inner sides; this in particular does not rule out that the respective enveloping part has a step in itself close to the respective adjacent enveloping part, which is even preferred). The enveloping parts can (at least approximately) have the same height or a different height. If the enveloping parts have a different height, the height of the (respective) smaller enveloping part can be at least 20%, possibly at least 50% or at least 80% of the height of the (respective) larger enveloping part. Insofar as a “height” is mentioned here (or further above and also further below), this is to be understood in particular as a vertical extension of the respective referred entity. However, this can also be understood to mean a dimension in a direction that extends through two appropriately provided pressure devices for pressurizing the fluid (in particular pressure piston) is specified.

A height of the wrapping device can be at least 0.5 times, preferably at least 1.1 times, possibly at least 1.4 times as large as a width, the width preferably being a maximum extension perpendicular to a height direction.

A height of the first and / or second enveloping part can be at least 0.2 times, preferably at least 0.5 times, possibly at least 0.7 times as large as one (respective) width, the width preferably being a maximum extent perpendicular to a height direction.

The wrapping device (preferably at least one or more or all of the wrapping parts, each individually or in combination) is preferably designed, at least one height section which contains the (possibly complete) holding device (holding plate) and / or the (possibly complete) workpiece , in particular to enclose (encase) the entire circumference.

The second (or further) wrapping part is preferably a wrapping part that is structurally delimited from the first wrapping part, in particular can be removed therefrom (non-destructively, preferably by hand) and / or can be connected to it manually (directly or indirectly) . As a result, the construction or assembly of the flow lapping device for carrying out a flow lapping process and / or its dismantling can be simplified.

The holding device can be inserted into the wrapping device (in particular between the first and second wrapping part). Alternatively or additionally, the holding device can be clamped in the wrapping device (in particular between the first and second wrapping part). As a result, the holding device (holding plate) can be arranged (assembled) within the wrapping device or a reliable seal can be achieved in a simple manner.

The enveloping device and / or the first and / or the second enveloping part can form an annular jacket, preferably a hollow cylinder, preferably circular or polygonal in cross section, in particular quadrangular. In this way, shielding can be ensured in an effective and simple manner.

In one embodiment, the at least one holding device (holding plate) is arranged, preferably at the level of a transition between the first and second enveloping part. As a result, the two enveloping parts can be used in a simple manner in order to support the holding device (holding plate), in particular to fix it. At least one projection and / or at least one step, on which the holding device is preferably placed, can be formed on an inner wall of the wrapping device, preferably at least on an inner wall of the first wrapping part.

An annular, in particular annular groove-shaped, receiving space can be formed on the inner wall of the wrapping device, a peripheral edge of the holding device being received in the receiving space.

A step can optionally be implemented by an offset of an inner wall (radially) inward, this offset possibly not decreasing again (as in the case of a projection). In particular, a step is to be understood as an alternative to a projection. In any case, by means of such measures, a corresponding holding device (holding plate) and thus also the workpiece for performing the fluid lapping can be installed in a simple manner (without tools).

Preferably, mutually facing ends of the first and second enveloping part (together) form a, preferably ring-shaped, in particular ring-groove-shaped, receiving space for receiving a peripheral edge of the holding device (holding plate). For this purpose, at least one of the ends adjoining one another, preferably both ends adjoining one another, preferably has a step and / or a (inwardly directed) projection. An annular groove-shaped receiving space is to be understood in particular as a receiving space which is (at least essentially) U- or V-shaped in cross section and / or in particular does not have an open bottom. Such a measure allows the flow lapping device to be prepared for the flow lapping process in a simple manner.

Ends of the first and second enveloping parts facing one another can abut one another or have a distance from one another, possibly sealed, in particular form a gap (annular gap). If a gap is present, the holding device or holding plate itself can seal in a simple manner - in cooperation with the respective enveloping part. If a gap (annular gap) is formed, preferably no section of the holding device (holding plate) should be arranged in this. The gap and / or minimum distance between the wrapping parts is preferably less than 10 mm, wider preferably less than 5 mm, possibly less than 3 mm and / or less than a height of a (each) respective step of the previous paragraph and / or at least less than the sum of the heights of the two steps of the previous paragraph and / or less than a height the above ring groove.

The adjoining ends of the first and second enveloping parts preferably do not touch one another. For (additional) sealing, a sealing structure (or sealing element), in particular comprising a sealing groove with a sealing ring, can be arranged on at least one of the ends.

In preferred embodiments, the holding device or holding plate (possibly exclusively the holding device or holding plate) seals the two enveloping parts from one another

A connection between the holding device (holding plate) and the wrapping device can optionally be formed without (separate) connecting devices or at least without screws and / or without bolts and / or without (separate) clamping devices. Alternatively or additionally, the same applies to a connection between the first and second enveloping parts and / or for a connection between the holding device (holding plate) and the first enveloping part and / or a connection between the holding device (holding plate) and the second enveloping part.

A first closing device can be arranged at a first (in particular lower) end of the wrapping device. The first locking device preferably comprises a first pressure device, which preferably comprises a first (locking and / or pressure) cylinder and / or a first pressure piston (displaceable in the first locking device, in particular the first cylinder). Alternatively or additionally, a second closing device can be arranged at a second (in particular upper) end of the wrapping device. The second locking device preferably comprises a second pressure device, which preferably comprises a second (locking and / or pressure) cylinder and / or a second pressure piston (displaceable in the second locking device, in particular the second cylinder). The flow lapping device preferably comprises at least one, preferably separate, fluid-conducting device (in particular the above fluid-conducting device) arranged in particular within the wrapping device, preferably in order to guide the fluid in a targeted manner past the workpiece and / or through the workpiece.

The flow lapping device preferably comprises a first fluid-conducting device which is arranged on a first side, preferably below the folding device (holding plate) and / or is arranged within the first enveloping part, with at least one internal cross-section of the first fluid device preferably changing, in particular becoming larger, in the direction of the folding device ; and / or a second fluid guide device, which is arranged on a second side, preferably above the folding device, and / or is arranged within the second enveloping part, with at least one inner cross section of the second fluid guide device preferably changing in the direction of the folding device, in particular initially larger and then gets smaller; and or a third fluid guide device which is arranged on one (the) second side, preferably above the folding device, and / or is arranged within the second envelope part, at least one outer cross section of the third fluid guide device preferably changing, in particular becoming larger, in the direction of the folding device, wherein the third fluid guide device is preferably compact (without openings) and / or is arranged within the second fluid guide device.

In a further embodiment, at least one spacer (preferably as part of one, in particular the third,

Fluid guiding device) is provided in order to (further) distance the workpiece from a cover and / or a base, preferably a (separate, preferably non-destructively removable from the spacer, possibly by flange or by means of a tool) spacer extension is provided to provide a larger and / or to enable variable spacing (possibly without changing the third fluid guide device). The spacer extension is preferably provided as a separate component opposite the (actual) spacer and can in particular be placed and / or slipped onto it. The spacer and / or the spacer extension can (each) at least one or at least two, possibly at least four, rods (or Rods) to allow safe spacing. By means of such a spacer or such a spacer extension, simple and precise assembly (without tools) of the flow lapping device can take place. Due to the (respective) length of the spacer, in particular the rods, a variable total distance can be achieved without z. B. the third fluid guiding device has to be changed.

According to the embodiment, the folding device has at least one opening which can preferably be brought into alignment with at least one opening of at least one workpiece. This allows the (abrasive) fluid to be used effectively for the smoothing process.

The flow lapping device preferably comprises at least one fastening device in order to fasten at least one workpiece of a folding device, preferably a plurality of fastening devices, in particular in order to be able to fasten a plurality of workpieces to the folding device. Such a fastening device can, for example, comprise or enable a form-fit and / or force-fit fastening (connection), in particular enable fastening by plugging and / or clamping and / or screws.

According to the embodiment, the flow lapping device can be designed in several stages, preferably in such a way that at least two folding devices (folding plates) are formed, preferably one above the other and / or one behind the other in the fluid flow direction, with at least one workpiece being able to be arranged (or being arranged) on each folding device and / or in such a way that at least one third wrapping part is provided, which is preferably arranged between the first and second wrapping part or above the second wrapping part. As a result, a large number of workpieces can be smoothed in a simple and safe manner.

The flow lapping device is preferably not configured for shaping the workpiece, in particular exclusively for smoothing the workpiece.

The above-mentioned object is in particular further achieved by a system for assembling a flow lapping device for smoothing at least one Surface of at least one workpiece (of the above type), the system comprising a holding device, in particular comprising at least one holding plate, for holding the workpiece, as well as at least one enveloping device within which the fluid can flow (or flows around), the enveloping device in such a way the holding device can be arranged around (or is arranged) such that the holding device is at least partially supported, in particular fixed, by at least one inner wall section of the wrapping device. With regard to the advantages of the system, reference is made to the above statements on the flow lapping device.

The system preferably comprises at least two different, more preferably at least two different first and / or second and / or third fluid conducting devices, which can be arranged in particular at the same location and / or preferably differ by an external geometry and / or an internal geometry, possibly only by an outer geometry or only by an inner geometry and / or a height and / or a diameter, in particular an inner diameter and / or an outer diameter, and / or a shape, in particular an outer and / or an inner shape, and / or a material.

Such a system (or set) allows the flow lapping device to be adapted in a simple manner to different uses, in particular different surfaces or workpieces to be smoothed. As a result, the variability in the flow lapping device can be increased.

The above-mentioned object is also achieved in particular by an arrangement comprising at least one flow lapping device of the above type and at least one workpiece, with the following preferably applies: at least one workpiece adjoins (directly) the holding device and preferably rests (directly) on the holding device; and / or at least one opening of the workpiece is at least partially in line with at least one opening of the holding device and / or with at least one opening of at least one fluid guide device; and / or at least one fluid guide device adjoins (directly) the workpiece; and / or at least one fluid guide device rests (directly) on the workpiece; and / or at least one fluid guide device is arranged at least in sections around the workpiece. The above-mentioned object is also achieved in particular by a method for assembling a flow lapping device of the above type, the method preferably comprising the following steps: a) arranging at least part of one of the wrapping devices, in particular the first wrapping part, on a first closing device; b) Arranging the holding device in the wrapping device, in particular in that the holding device is initially arranged on (on) the first wrapping part and then a second wrapping part of the wrapping device is arranged on (on) the holding device and / or on (on) the first wrapping part ; and c) arranging a second closing device on (on) the wrapping device, in particular on (on) the second wrapping part. Steps a), b) and c) can be carried out in the order according to the alphabet or in a different order (for example c) - b) - a)).

A flow lapping device is preferably assembled without tools, in particular (only) by plugging the elements into one another. In terms of the device, the flow lapping device is preferably configured accordingly. As a result, a preparation of the flow lapping device for carrying out the flow lapping process can be achieved in a simple manner.

The holding device is preferably arranged (directly) on at least one first fluid-conducting device, in particular placed on it, and / or at least one second fluid-conducting device is arranged (directly) on the holding device, in particular placed on it.

According to the embodiment, the holding device can be fixed or fixed between the first enveloping part and the second enveloping part, in particular by applying pressure to the first and / or second enveloping part (preferably pressing the first and second enveloping part against one another).

The above object is also achieved in particular by assembling the above arrangement, comprising the method for assembling a flow lapping device, wherein before or after step b) at least one workpiece is arranged on (on) the holding device, the workpiece preferably (in the operating state) is not pressurized and / or only comes into contact with the holding device and / or, if applicable, the fastening device (s).

At least one third fluid conducting device is preferably arranged (directly) on the workpiece, in particular placed on it.

The above-mentioned object is also achieved in particular by a method for smoothing at least one workpiece, comprising the steps: providing the above arrangement (comprising at least one flow lapping device); and flowing through, in particular bi-directional flowing through, the arrangement in such a way that at least one surface of the workpiece, in particular at least one inner surface, preferably of an impeller, is smoothed. During the method, there is preferably no, at least no substantial, shaping (or no, at least no substantial, shaping) of the workpiece, in particular only smoothing of the workpiece.

The (respective, in particular the respective first and / or second) fluid guide device preferably comprises at least one opening (possibly a bore).

The (respective) fluid guide device is preferably formed from plastic and / or by means of an additive manufacturing process. The plastic can preferably comprise polyolefin, in particular polyethylene and / or polypropylene, and / or at least one polyamide, in particular PA 6. In the case of polyamide (such as PA 6) in particular, a fluid guide device can be provided in a comparatively simple manner that is sufficiently resistant to wear (due to abrasive fluids).

The holding device and / or the workpiece is preferably not in (direct) contact with a closing device (in particular an upper cover part or a lower base part of the flow lapping device).

The workpiece is preferably only connected or in contact with the holding device. In this respect, the wrapping device (or the respective wrapping part) also that the workpiece is not directly subjected to the pressure of a locking device.

In general, the invention enables the machining of complex external and / or internal geometries with comparatively little effort. If necessary, small series and series processing (especially in two-way mode) can be made possible. Component damage (for example by a closing mechanism of the flow lapping device) and / or pressurization (for example more than 50 bar or more than 100 bar) can be prevented (at least with a higher probability).

In addition to cyclical (one-sided) machining, two-way machining is also possible. In general, safety, in particular work safety, is improved on the flow lapping device.

The possibility of using a counter pressure means that more areas of surfaces, in particular channel surfaces, can be reached.

In particular, a closed system is provided in which the fluid envelops the workpiece and, if necessary, is only pressed through the workpiece through defined openings.

By changing (specific) folding devices (holding plates or component platforms), different workpieces (components) can be processed in the flow lapping device.

Optionally, various clamping systems (possibly simultaneously or jointly) can be used as clamping devices for fastening the workpiece (component) on the folding device (component platform).

According to the invention, a set is thus also comprising the components of the above flow lapping device and various folding devices (folding plates or component platforms) that differ from one another, in particular in terms of size and / or shape and / or fastening devices for fastening the respective workpiece. Further embodiments emerge from the subclaims.

The invention is described below on the basis of exemplary embodiments, which are explained in more detail with the aid of the figures.

Here show:

Fig. 1 is a schematic sectional view of an inventive

Flow lapping device;

FIG. 2 shows the flow lapping device according to FIG. 1 with fluid guide devices; FIG.

3 shows an alternative embodiment of one according to the invention

Flow lapping device;

4 shows a schematic sectional view of a further embodiment of a flow lapping device according to the invention;

5 shows a schematic sectional view of a detail of a flow lapping device according to the invention;

6 shows an oblique view of components of an inventive

Flow lapping device;

7a-7e various sections of a method for preparing a flow lapping device according to the invention;

8 shows an oblique sectional view of the flow lapping device according to FIG. 6;

9 shows a spacer according to the invention for the

Flow lapping device; and

10 shows a spacer extension according to the invention for the flow lapping device. In the following description, the same reference numbers are used for parts that are the same and have the same effect.

1 shows a flow lapping device according to the invention in a schematic sectional view. The flow lapping device comprises a folding device 10 (in the form of a holding plate or component platform). A workpiece 11 (for example in the form of an impeller) is arranged on the folding device 10.

Furthermore, the folding device 10 is fixed to a wrapping device 12.

The wrapping device 12 comprises a first wrapping part 13 and a second wrapping part 14 in the form of flea cylinders (e.g., circular in cross section).

The first and second enveloping part 13, 14 can abut one another or touch one another or be spaced (at least slightly) apart from one another (for example by a gap that may be sealed off).

The first wrapping part 13 has a step 15 on (in) which an edge or a (circumferential) edge 16 of the folding device 10 is arranged (placed).

The second enveloping part 14 has a complementary step 17 which, together with the first step 15, forms an annular groove-shaped receptacle 18. By means of this annular groove-shaped receptacle 18, the folding device 10 is fixed within the wrapping device 12, specifically by an inner wall section 19 of the same.

The folding device 10 has (at least) one opening 20 so that abrasive fluid 26 can penetrate through this opening 20 into a (corresponding) opening 21 of the workpiece 11 in order to smooth an inner (flea space) surface of the workpiece 11.

The fluid 26 can be pressurized by a first (lower) pressure piston 23 and a second (upper) pressure piston 24 so that the fluid can flow either from top to bottom or from bottom to top (as indicated by arrows 25). The first pressure piston 23 is arranged in or on a first (lower) closing device 27, the second pressure piston 24 is arranged in or on a second (upper) closing device 28. The second (upper) closing device 28 is not supported on the workpiece 11, but on the wrapping device 12 or its second wrapping part 14. This can effectively prevent impairments on the workpiece 11 from being caused by a closing pressure.

In addition to the opening 21, the workpiece 11 has further openings 31, 32 (which are preferably oriented in the lateral direction).

FIG. 2 basically shows the flow lapping device according to FIG. 1, but with additional fluid guide inserts. Specifically, a first fluid guide insert 33 is located below the folding device 10 and a second fluid guide insert 34 and a third fluid guide insert 35 are located above the folding device 10.

The first fluid guide insert 33 has a fluid guide which tapers (continuously) in the direction of the folding device 10 or its opening 20. A corresponding flea space formed by the first fluid guide insert 33 is preferably conical or frustoconical.

Above the folding device 10 and also above the workpiece 11 is the third fluid guide device 35, which is designed without an inner flea space and tapers starting from the workpiece 11. An outer surface of the second fluid guide insert 35 is preferably shaped like a cone or a truncated cone.

The second fluid guide insert 34 in turn has a flea space, the cross section of which, starting from the folding device 10, initially widens and then tapers again. The (continuous) expansion adjoins the openings 31, 32 of the workpiece 11 (directly). Overall, with the present geometry of the workpiece 11 (in particular an impeller), the fluid can thereby be effectively passed through or diverted in an effective manner.

FIG. 3 shows an alternative embodiment which basically corresponds to the embodiment according to FIG. 1. In the embodiment according to FIG. 3, however, a plurality of openings 20 are provided in the folding device and a plurality of workpieces 11 (according to the number of openings) arranged.

The number of openings and / or workpieces can be at least two or at least three or at least five (for example seven, as shown in FIG. 3).

FIG. 4 shows a further embodiment of the flow lapping device according to the invention, which at least partially corresponds to the embodiment according to FIG. 3. In addition to the embodiment according to FIG. 3, the embodiment according to FIG. 4 comprises a two-stage configuration with two folding devices 10 (which can each be configured like the folding device 10 in FIG. 3). A multiplicity of workpieces 11 are arranged on each of the folding devices 10. In addition to the two wrapping parts 13, 14, a third wrapping part 36 is provided in the embodiment according to FIG. 4. This third wrapping part 36 comprises a step 17a analogous to the step 17 of the second wrapping part. The second wrapping part 14 in FIG. 4 comprises a step 15a analogous to the step 15 of the second wrapping part.

In FIG. 5, various solutions for fastening the respective workpiece on the folding device 10 are illustrated. For the sake of clarity, these are all shown in one figure, namely FIG. 5, but can also be used independently of one another.

For fastening a workpiece 11, according to FIG. 5, a clamping device 37 (in particular a clamping adapter) can be used and / or a clamping device 38 (in particular a clamping claw) and / or a pipe or socket 39 (in particular a threaded pipe) and / or or a screwing device 40.

6 shows a further embodiment of a flow lapping device according to the invention in the assembled state. Individual steps of a method for the fiering direction of the flow lapping device for a flow lapping process are explained with reference to FIGS. 7a to 7e (each individual step is not also explained on the basis of a single figure, but rather steps are also partially summarized in one figure). First, according to FIG. 7a, a base device 46 (base plate) is provided, on which the first wrapping part 13 is then arranged. Thereafter, the first fluid guide device 33 is arranged within the enveloping part 13.

Thereupon (see FIG. 7 b) the folding device 10 (holding plate) is placed on the first fluid guide device 33 or in particular on the step 15 of the first wrapping part 13. The second wrapping part 14 is then placed on the first wrapping part 13 and the folding device 10, and then the second fluid guide device 34 is placed on the folding device 10.

In a next step (see FIG. 7c) the workpiece 11 is placed or placed in the second fluid guide device 34 or on the folding device 10. Alternatively, the workpiece 11 can also be connected to the folding device 10 beforehand.

In Fig. 7d, the third fluid guide device 35 is shown, which is placed on the workpiece 11 and at the same time has a spacing function. In turn, an upper cover device 42 (see FIG. 7e) is arranged above the second 34 and third 35 fluid guide device. The structure resulting therefrom is shown again in an oblique sectional view in FIG. 8.

The configuration according to FIG. 7e or FIG. 8 can then form the flow lapping device (possibly with further parts, such as pressure pistons and the like, not shown) and is prepared to carry out a flow lapping process.

In Fig. 9, the third fluid guide device 35 is shown in an oblique view. In particular, several rods 43 are shown here, which ensure the spacing function. In general, at least one or at least two or at least 4 and / or at most 20 or at most 10 bars 43 can be present.

In FIG. 10 is a spacer extension 44 which can be placed on the spacer or the second fluid guide device 34 in FIG. 9. For this purpose, the spacer extension 44 also has rods 45 which can be brought into a plug-in connection with corresponding plug-in devices 48 via a respective plug-in device 47. The plug-in devices 47 can be projections (as shown in FIG. 10) or (as not shown in FIG. 10) corresponding recesses. The plug-in devices 48 can form recesses (as shown in FIG. 9) or reverse projections (in particular analogous to the projections according to FIG. 10).

At this point, it should be pointed out that all of the parts described above, seen on their own and in any combination, in particular the details shown in the drawings, are claimed as embodiments of the invention. Changes to this are familiar to the person skilled in the art.

List of reference symbols

10 folding device

11 workpiece

12 Wrapping device

13 first wrapping part

14 second wrapping part 15, 15a stage

16 edge edge

17, 17a stage

18 Recording / recording room

19 inner wall section

20 opening

21 opening

23 first pressure piston

24 second pressure piston

25 line

26 fluid

27 first locking device

28 second locking device

31 opening

32 opening

33 first fluid guide insert

34 second fluid guide insert

35 third fluid guide insert

36 third wrapping part Clamping device

Clamping device

Pipe or nozzle

Screwing device

Lid device

Rod

Spacer extension

Rod

Basic equipment (base plate)

Plug-in device

Claims

Expectations

1. Flow lapping device for smoothing at least one surface of at least one workpiece (11), preferably an impeller, by means of an abrasive fluid (26), comprising at least one folding device (10) for holding the workpiece (11), in particular comprising at least one holding plate and at least one Wrapping device (12) arranged around the folding device (10), within which the fluid can flow, the folding device (10) being at least partially supported, in particular fixed, by at least one inner wall section (19) of the wrapping device (12).

2. Flow lapping device, in particular according to claim 1, for smoothing at least one surface of at least one workpiece (11), preferably an impeller, by means of an abrasive fluid (26) comprising at least one folding device (10) for holding the workpiece (11), in particular comprising at least a holding plate, at least one wrapping device (12) arranged around the folding device (10) within which the fluid can flow, and at least one fluid guide device (33, 34, 35) arranged, in particular inserted, inside the wrapping device (12) in order to redirect the fluid within the wrapping device (12) at least regionally, in particular in such a way that the fluid, when it is in In the direction of the workpiece (11) flows, it is directed to at least one opening (21) in the workpiece (11).

3. Flow lapping device according to claim 1 or 2, wherein the wrapping device (12) comprises at least a first (13), preferably lower, and a second (14), preferably upper, wrapping part.

4. Floating lapping device according to one of the preceding claims, in particular according to claim 3, wherein the holding device (10) is inserted into the wrapping device (12), in particular between the first (13) and second (14) wrapping part, and / or in the wrapping device (12) , in particular between the first (13) and second (14) enveloping part, is clamped.

5. Flow lapping device according to one of the preceding claims, in particular according to claim 3 or 4, wherein the wrapping device (12) and / or the first (13) and / or the second (14) wrapping part, preferably a circular or polygonal in cross-section, in particular square, ring jacket, preferably hollow cylinder, forms / train.

6. Flow lapping device according to one of the preceding claims, in particular according to one of claims 3 to 5, wherein the at least one holding device (10) is preferably arranged at the level of a transition between the first (13) and second (14) enveloping part.

7. Floating lapping device according to one of the preceding claims, wherein at least one projection and / or at least one step (15) is formed on an inner wall of the wrapping device (12), preferably at least on an inner wall of the first wrapping part (13), on which / which the holding device (10) is preferably placed on and / or an annular, in particular annular groove-shaped, receiving space (18) is formed on one / the inner wall of the wrapping device (12), a peripheral edge of the holding device (10) being received in the receiving space (18) is.

8. flow lapping device according to one of the preceding claims, in particular according to one of claims 3 to 7, wherein to each other adjoining ends of the first (13) and second (14) enveloping part form a preferably ring-shaped, in particular ring-groove-shaped, receiving space (18) for receiving a peripheral edge of the holding device (10), at least one of the adjoining ends, preferably both adjoining ends, have a step or a protrusion.

9. Floating lapping device according to one of the preceding claims, in particular according to one of claims 3 to 8, wherein adjoining ends of the first (13) and second (14) enveloping part abut one another or have a possibly sealed distance from one another, in particular a gap form.

10. Flow lapping device according to one of the preceding claims, wherein a first closing device (27) is arranged at a first, in particular lower, end of the wrapping device (12), the first closing device preferably comprising a first cylinder and / or a first pressure piston (23) and / or a second closing device (28) is arranged at a second, in particular upper, end of the wrapping device (12), the second closing device preferably comprising a second cylinder and / or a second pressure piston (24).

11. Floating lapping device according to one of the preceding claims, comprising at least one, in particular separate, fluid guiding device (33, 34, 35), preferably arranged within the wrapping device (12), to guide the fluid (26) past and / or in a targeted manner on the workpiece (11) or through the workpiece.

12. Floating lapping device according to one of the preceding claims, in particular according to one of claims 2 to 11, comprising a first fluid guide device (33) which is arranged on a first side, preferably below the holding device (10) and / or within the first enveloping part ( 13) is arranged, with at least one inner cross-section the first fluid guide device (33) preferably changes in the direction of the holding device (10), in particular becomes larger, and / or comprising a second fluid guide device (34) which is arranged on a second side, preferably above the holding device (10), and / or inside of the second enveloping part (14) is arranged, wherein at least one inner cross-section of the second fluid guide device (34) preferably changes in the direction of the holding device, in particular initially larger and then smaller, and / or comprising a third fluid guide device (35), which on a / the second side, preferably above the holding device (10), is arranged and / or is arranged within the second enveloping part (14), wherein at least one outer cross section of the third fluid guide device (35) preferably changes in the direction of the holding device, in particular becomes larger, the third Fluid guide device is preferably designed compact and / or within the second n fluid guide device is arranged.

13. Floating lapping device according to one of the preceding claims, comprising at least one spacer (43), preferably as part of one, in particular the third, fluid guide device (35), in order to space the workpiece (11) from a cover part and / or a base part, preferably a spacer extension (44) is provided to allow greater spacing.

14. Flow lapping device according to one of the preceding claims, wherein the holding device (10) has at least one opening (20) which can preferably be brought into congruence with at least one opening (21) of at least one workpiece (11).

15. Floating lapping device according to one of the preceding claims, comprising at least one fastening device to fasten at least one workpiece to the holding device (10), preferably comprising a plurality of fastening devices, in particular to be able to fasten a plurality of workpieces to the holding device.

16. The flow lapping device according to one of the preceding claims, wherein the flow lapping device is designed in several stages, in particular such that at least two folding devices (10), preferably one above the other and / or one behind the other in the fluid flow direction, are formed, with at least one workpiece (10) on each folding device (10). 11) can be arranged and / or in such a way that at least one third wrapping part (36) is provided, which is preferably arranged between the first (13) and second (14) wrapping part or above the second wrapping part (14).

17. System for assembling a flow lapping device for smoothing at least one surface according to one of the preceding claims, wherein the system comprises a folding device (10), in particular comprising at least one holding plate for holding the workpiece (11), and at least one wrapping device (12) within the the fluid is flowable, wherein the wrapping device (12) can be arranged around the folding device (10) in such a way that the folding device (10) is at least partially supported, in particular fixed, by at least one inner wall section (19) of the wrapping device (12) .

18. System according to claim 17 for assembling a flow lapping device according to one of claims 1 to 16, in particular according to one of claims 2 to 16, wherein the system is at least two different, preferably at least two different first (33) and / or two different second (34 ) and / or two different third (35) fluid conducting devices, which can preferably be arranged at the same location and / or preferably differ by:

an outer geometry and / or an inner geometry, possibly only through an outer geometry or only through an inner geometry and / or

- a fleas and / or

- A diameter, in particular an inner diameter and / or an outer diameter and / or

- a shape, in particular an outer and / or an inner shape, and / or

- a material.

19. An arrangement comprising at least one flow lapping device according to one of claims 1 to 16, as well as at least one workpiece (11), where in particular the following applies:

- At least one workpiece (11) adjoins the holding device (10) and is preferably on and / or on the holding device (10)

- At least one opening (21) of the workpiece (11) is at least partially in congruence with at least one opening (20) of the holding device (10) and / or with at least one opening of at least one fluid guide device and / or

- At least one fluid guide device adjoins and / or adjoins the workpiece (11)

- At least one fluid guide device rests on and / or on the workpiece (11)

- At least one fluid guide device is arranged at least in sections around the workpiece (11).

20. The method for assembling a flow lapping device according to one of claims 1 to 16, the method preferably comprising the following steps: a) arranging at least part of the wrapping device (12), in particular the first wrapping part, on a first closing device; b) Arranging the holding device (10) in the wrapping device (12), in particular in that the holding device (10) is initially arranged on the first wrapping part (13) and then a second wrapping part (14) of the wrapping device (12) is arranged on the holding device (10) and / or is arranged on the first enveloping part (13); c) Arranging a second closing device on the wrapping device (12), in particular on the second wrapping part (14).

21. The method according to claim 20, wherein the holding device is arranged on at least one first fluid guide device (33), in particular is placed on top and / or at least one second fluid guide device (34) is placed on the holding device (10), in particular placed on top.

22. The method according to claim 20 or 21, wherein the holding device between the first wrapping part (13) and the second wrapping part (14), in particular by applying pressure to the first (13) and / or second (14)

Wrapping part, is fixed.

23. The method for assembling an arrangement according to claim 19, comprising the method according to one of claims 20 to 22, wherein before or after step b) at least one workpiece (11) is arranged on the holding device (10), wherein the workpiece (11 ) is preferably not subjected to pressure and / or only comes into contact with the holding device (10) and / or possibly the fastening device.

24. The method according to claim 23, wherein at least one third fluid guide device (35) is arranged on the workpiece (11), in particular is placed on it.

25. A method for smoothing at least one workpiece (11), comprising the steps:

- providing an arrangement according to claim 19;

- Flow, in particular bi-directional flow, of the arrangement in such a way that at least one surface of the workpiece (11), in particular at least one inner surface, is smoothed.