ES2941624T3 - Abrasive segment for an abrasive roller, abrasive tool and use - Google Patents

Abstract

The invention relates to an abrasive segment (1) for an abrasive roller (2), said abrasive segment comprising: at least one carrier body (3) for attaching (4) the abrasive segment (1) to a lateral surface (5) of the abrasive roller (2) in an interlocking manner; and at least one substantially flat abrasive layer (6), wherein at least one abrasive layer (6) is oriented substantially parallel to the side surface (5) of the abrasive roller (2) in a state of the abrasive segment (1) in which it is attached to the abrasive roll (2), and at least one elastic intermediate layer (7) is located between the at least one support body (3) and the at least one abrasive layer (6). (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Abrasive segment for an abrasive roller, abrasive tool and use

The present invention relates to an abrasive segment for an abrasive roller, comprising at least one support body for form-fitting of the abrasive segment to a surrounding surface of the abrasive roller and at least one essentially planar abrasive medium layer. The present invention also relates to an abrasive roller for machining a surface of a workpiece and/or a surface of a negative mold for producing the workpiece, the abrasive roller having an essentially cylindrical base body with an enveloping surface. The present invention also relates to an abrasive machine with at least one abrasive roller according to the invention, including abrasive segments according to the invention, and at least one rotary drive. The present invention also relates to the use of such a grinding segment, such a grinding roll or such a grinding machine.

Such an abrasive segment is already known from DE 20 2005 016 671 U1, in which the abrasive medium is attached to a support medium with a Velcro strap in such a way that the abrasive medium layer is oriented normal with respect to the surrounding surface of the abrasive roll and when the abrasive segment contacts a workpiece, the abrasive segment is elastically deformed in one direction.

Another abrasive segment is already known from US Pat. No. 2,067,089 A, the abrasive segment being arranged on a support. This document forms the basis of the preamble of the present claim 1.

According to a first aspect, it is disadvantageous in the state of the art that due to the orientation of the normal abrasive medium layer with respect to the surrounding surface of the abrasive roll during rotation in the grinding process, the removal rate is only partially effective, since the force on the workpiece, due to the elastic deformation of the abrasive segment, is not transmitted optimally to the workpiece.

In addition, the abrasive segment follows the contour during the removal process and therefore does not contribute significantly to leveling a workpiece surface.

The abrasive segment described in DE 20 2005 016 671 U1 is provided with an elastically deformable support means, in this case it is preferably an elastically flexible material, such as a brush, a foam material or another suitable material.

According to a second aspect, it is disadvantageous in the prior art that elastically flexible materials adapt to deformation during the grinding process, but are not designed for grinding fluid supply and/or grinding fluid storage.

In addition, due to the described support means, only very limited properties relevant to the removal process, such as vibration damping, noise suppression, thermal protection, variable surface geometries, etc., can be addressed.

Such an abrasive roller is known from DE 20 2005 016 671 U1, which presents mounted abrasive segments provided with a layer of abrasive medium oriented normal to the surrounding surface.

It is disadvantageous in the prior art that without retooling the attached abrasive segments, material can only be removed in one direction of rotation.

A grinding machine with grinding segments is known from DE 202005 016 671 U1, in which the grinding segments are arranged on the grinding roll in such a way that the layer of grinding medium is oriented normal to the surrounding surface of the grinding roll. and therefore, after mounting the abrasive roll, the direction of rotation of the abrasive roll is determined by the function of the layer of abrasive medium.

The disadvantage here is that due to the orientation of the abrasive medium layer normal to the surrounding surface of the abrasive roller during rotation in the grinding process, by means of the oriented abrasive medium layer normal to the surrounding surface of the abrasive roller , an automatic feed cannot be generated even in the only possible direction of rotation for the grinding process, which is preferably necessary for large workpieces with manual machining, and a high removal rate is also not possible.

Therefore, the technical objective according to the first aspect of the present invention is to indicate an abrasive segment improved with respect to the state of the art, in which the disadvantages of the state of the art are at least partially eliminated and which is characterized in Particularly by a layer of abrasive media that allows for greater material removal and the removal of material by the abrasive segment also contributes to significant leveling of the workpiece surface.

The technical objective according to the second aspect is to indicate an abrasive segment that ensures an effective supply of abrasive fluid and a storage of abrasive fluid and that is adapted to the relevant parameters for the removal process, such as vibration, sound, heat, shape of the surface, etc., without sacrificing comfortable handling and/or a long useful life and improving the abrasion result.

Another object according to a third aspect of the present invention is to indicate an abrasive roller that is improved with respect to the state of the art, in which case the drawbacks of the state of the art are at least partially eliminated, and which is characterized in particular by the fact that the abrasive roller can be used in both directions of rotation relevant to the removal process.

Another object according to a fourth aspect of the present invention is to indicate an abrasive machine which is improved compared to the state of the art, in which case the disadvantages of the state of the art are at least partially eliminated, and which is characterized both by easy handling of large abrasive rollers (from a roller length and/or a roller diameter of approx. 300 mm), as well as by a high possible removal on the workpiece.

Another object according to a fifth aspect of the present invention is to indicate an improved use of the abrasive segment, abrasive roller or abrasive machine compared to the state of the art.

The objective according to the first aspect is solved by the features of claim 1.

According to the invention, therefore, it is provided that at least one layer of abrasive medium is oriented substantially parallel to the surrounding surface of the abrasive roller in a state attached to the abrasive roller of the abrasive segment, and that the at least one body is arranged between the abrasive roller support and at least one layer of abrasive medium, at least one elastic intermediate layer.

As a result, it is possible for the contact and therefore also the force transmission between the layer of abrasive medium and the workpiece surface to occur essentially normal to the surrounding surface of the abrasive roller, ensuring a higher removal capability on the workpiece (for example, negative mold and its mold parts), since the abrasive segment can apply more pressure on the surface.

Furthermore, by the parallel orientation of the layer of abrasive medium with respect to the surrounding surface, an efficient leveling of the surface to be machined is ensured, in particular the residues are effectively treated and the surface is locally corrected and leveled to the surrounding surface conditions. .

Above all, after repair work on negative molds, irregularities and residues remain due to compensation materials, which can be effectively removed with this abrasive segment.

The term elastic (synonymous with shape-holding compressible) means that the interlayer is compressible under the influence of force and the interlayer returns to its original shape when no force is applied. By means of this property, essentially two advantages are achieved, namely that the layer acts as a pressure equalizer and that it develops a damping effect during the abrasive process.

The objective according to the second aspect is solved by the features of claim 2.

Provision is therefore made that at least one elastic intermediate layer is arranged between the at least one support body and the at least one layer of abrasive medium, which essentially consists of felt.

This makes it possible that due to the spongy nature an elastic interlayer structure can be formed, which is suitable both for fluid absorption, fluid storage, as well as fluid release optimally for the disposal process.

Due to the elastic intermediate layer, which essentially consists of felt, the abrasive segment can function both in dry abrasion and also with the use of abrasive fluid.

In addition, the elastic properties of the felt have a high elasticity to pressure and resistance capacity, due to which hardly any wrinkles appear, which would be detrimental to the abrasive process.

In addition, the felt is sound-absorbing and insulates efficiently against heat, these characteristics ensuring in particular both a greater comfort in handling, as well as a better polishing result when using the abrasive segment. In addition, the padding guarantees protection against too high mechanical stress on all involved components, such as abrasive layer, support body and/or workpiece.

The adaptation of the properties of the felt to the individual requirements of the surface to be machined can also be controlled via the density of the felt layer on which it is based.

Added to this is the positive property that due to the material-specific properties of the felt, areas with different degrees of curvature and/or areas with different thicknesses can also be machined at the same time without having to influence the shape of the curved areas. and/or with different thickness in advance in terms of abrasive segment configuration and without having to lose removal capacity. As a result, the removal process also has a particularly leveling effect on the surface.

In addition, the abrasive segment with the elastic intermediate layer consisting of felt offers the possibility of additionally treating areas with special and demanding curvature, such as convex or concave geometries, without a great effort of costs or resources, in that the Elastic felt intermediate layer follows the curvature of the workpiece to be machined. Furthermore, the thickness of the resilient felt interlayer can vary in thickness by at least one length of the abrasive segment.

The use of felt as an elastic support intermediate layer thus offers the advantage that both the pressure required for effective removal is transmitted from the support element via the layer of abrasive medium to the workpiece, as well as that draw complex surfaces on the contour.

Due to the vibration-inhibiting property of the felt, which can be adapted to the conditions of the removal process thanks to the specific composition, an easy and comfortable handling of the abrasive segment is possible, which, due to the low specific gravity, essentially does not involve no extra weight for handling.

Added to this is the positive property that the abrasive segment is exposed to less elastic deformation and this results in increased service life or minimization of signs of wear. In this way, it is possible to dispense with a frequent change of the felt layer, as well as of the support body.

The objective according to the third aspect is solved by the features of claim 7.

According to the invention, therefore, provision is made for at least one such abrasive segment to be positively attached to the outer surface.

This makes it possible for the material-specific properties of the elastic interlayer, which benefit the grinding process, which is made in particular of felt and can thus guarantee damping, soundproofing, pressure equalization, heat protection, absorption/ fluid storage/release and deformability, can be exploited to an optimal extent in both directions of rotation.

The objective according to the fourth aspect is solved by the features of claim 11.

According to the invention, therefore, it is provided that the at least one rotary drive can cause the at least one abrasive roller to rotate in order to cause a relative movement of at least one abrasive medium layer relative to the workpiece surface to be machined. of work and/or of the negative mold.

This enables the layer of abrasive medium to be oriented essentially parallel to the surrounding surface of the abrasive roll and both directions of rotation to be provided with automatic feed during the abrasive process. This allows easy handling of abrasive rolls with a longitudinal extension of up to 800 mm.

Due to the elastic intermediate layer, the abrasive segments also ensure large-area contact and effective removal by the layer of abrasive medium over the entire longitudinal extent of the abrasive roller.

Advantageous embodiments of the invention are defined in the dependent claims.

According to an advantageous development of the invention, it is provided that at least one elastic intermediate layer is essentially made of felt, is in the form of a foamed material or in the form of a plastic material and that the thickness of at least one elastic intermediate layer is configured in such a way that an abrasive fluid, in particular water, can be stored and released in it and/or that at least one elastic intermediate layer is designed to be free of abrasive media.

As a result, a particularly advantageous interaction of the initially abrasive-free workpiece surface and the abrasive layer during wet grinding is achieved, i.e. in the sense that an abrasive fluid stored in the elastic intermediate layer can be blown out during the removal process and abrasive dust that forms on the layer of abrasive media during abrasion can be rinsed away efficiently.

In addition, the abrasive medium prevents a high heat generation and thus protects both the layer of abrasive medium, as well as the surface of the workpiece and/or the negative mold.

In the case of work pieces and/or negative molds, in which no abrasive fluid is required during the process removal, the additional cleaning work for the user of the abrasive segment can be dispensed with thanks to the elastic intermediate layer free of abrasive media.

Provision is advantageously made for the at least one support body to be essentially T-shaped in cross section and/or in such a way that the support body can be attached positively to the outer surface via a dovetail connection of the abrasive roller.

As a result, a form-fitting connection of the segment to a corresponding groove in a roller is made possible, in which case the forces acting during the removal process are transmitted to a large extent via the support body to the more shaped base body. solid from the abrasive roll.

By using a dovetail joint the positive fit is given to a greater extent, since a clamping occurs not only in a direction transverse to the dovetail joint, but also in a direction perpendicular to the slot .

In the longitudinal direction of the groove, it is preferably provided that the abrasive segment is fixed on the abrasive roller by means of a constructive termination.

It has turned out to be advantageous if the at least one supporting body comprises at least one supporting surface, on which the at least one elastic intermediate layer rests at least in regions, the at least one supporting surface being preferably oriented substantially parallel to the at least one supporting surface. least one layer of flat abrasive medium.

Since the parallel orientation of both the abrasive medium layer and the support body towards the surrounding surface of the abrasive roller is ensured by this arrangement, the forces which are necessary for the removal process and which result during the removal process, they act to a large extent in the radial direction of the abrasive roll. This is advantageous for an efficient and gentle removal process.

According to an advantageous embodiment of the invention, provision is made for at least one elastic intermediate layer to be attached to at least one support body and/or to at least one abrasive medium layer with an adhesive layer.

On the one hand, the adhesive layer as a binding medium is economical and functionally sufficient for demanding removal processes.

After the end of the service life of the support body, elastic intermediate layer or abrasive medium layer, a quick replacement of worn parts can be produced by means of the adhesive layer without great material requirements.

It has turned out to be advantageous if at least one elastic intermediate layer has a thickness that is at least three times greater than a layer thickness of at least one abrasive medium layer.

The layer of abrasive medium particularly preferably has a layer thickness in the range between 0.6 mm and 1.5 mm.

The elastic intermediate layer preferably has a thickness in the range between 5 mm and 12 mm, particularly preferably in the range between 8 mm and 10 mm.

This prevents contact between the support bodies and the surface of the workpiece or the negative mold in the event of severe surface irregularities of the workpiece or negative mold.

In addition, the elastic interlayer only develops its full material-specific benefits for the removal process above a certain thickness.

An advantageous variant for surface machining of a composite workpiece or negative mold is that at least one abrasive medium layer comprises at least one abrasive medium, preferably diamond, cubic boron nitride, sintered corundum and/or or an abrasive medium with zirconium corundum, aluminum oxide and/or silicon carbide, preferably the at least one abrasive medium having an abrasive grain size of between 50 gm and 745 gm and/or being incorporated in at least one bonding medium , preferably a resin binder, preferably the layer of abrasive medium being arranged on a backing layer.

It is particularly preferred if the outer surface is provided with at least one groove for accommodating at least one abrasive segment, preferably at least one groove being essentially dovetail-shaped and the at least one abrasive segment being attached in a form-fitting manner. .

In an exemplary embodiment, it is provided that at least one groove is arranged obliquely to a longitudinal direction of the grinding roller, preferably at an angle of between 1° and 10°, particularly preferably at an angle of between 2° and 3° .5°.

As a result, a particularly harmonious grinding process is guaranteed, since both during the first contact of the grinding roller with the workpiece and during the grinding process, a favorable force transmission of the at least one grinding segment to the workpiece occurs. of work and lower impact forces are generated. Furthermore, through the angle of at least one groove it is possible that in a final phase of the abrasive contact of a first abrasive segment already comes into contact with the workpiece a next abrasive segment and as a result of this a reduction of the times, in which the workpiece is not in contact with the at least one abrasive segment.

As a result, the grinding result is improved by inclining at least one groove towards the longitudinal direction of the grinding roller and the grinding segments located in it.

Since the bearing bodies of the grinding segments are essentially T-shaped, at least one corresponding groove provides a snap-fit connection for the grinding segments on the outer surface of the grinding cylinder. In this case, a dovetail-shaped connection offers a secure connection of the abrasive segment with the abrasive roller, especially in the case of high stresses during the removal process.

In one embodiment of the invention, provision is made for at least one, preferably essentially cylindrical, opening for at least one tool holder to be arranged on at least one front side of the substantially cylindrical base body, preferably exactly two openings being arranged. openings on the at least one front side.

As a result, the effect is achieved that the grinding roller can be used as a tool for a wide variety of grinding machines or grinding robots.

In addition, a quick replacement of abrasive roller, abrasive machine or abrasive robot is possible.

This is a relevant factor during the processing of large surfaces of negative parts and/or molds, mainly for reasons of time and costs.

Due to the arrangement of the openings on the front side, it is possible for the abrasive segments to extend over the entire lateral extension of the abrasive roll.

If exactly two openings are arranged on the front side, commercial tool holders are taken into consideration.

Due to the resulting force arm between the opening and the center point of the front side, tangential acting forces can be transmitted and compensated for in the removal process, which is caused by the rotation of the grinding roller and the relative movement between grinding segment and surface, to a greater extent through the tool holder to the grinding machine or grinding robot.

According to a preferred embodiment of the invention, it is provided that at least one locking mechanism, at least one cover and at least one opening are arranged, the opening being arranged in at least one cover and the at least one locking mechanism being able to be inserted in at least one opening, for blocking the at least one abrasive segment on at least one of the end faces of the essentially cylindrical base body. As a result, a more effective form-fitting and force-fitting connection between abrasive segment and abrasive roller is guaranteed.

Due to the arrangement on the front side of the base body, the locking can also be carried out in a user-friendly manner already after the actual mounting on a grinding roller or a grinding robot.

Alternatively, it is possible to provide at least one handle, preferably provided with at least one abrasive fluid feed, for manually guiding the abrasive machine.

The handle ensures comfortable handling, even with large and heavy grinding wheels.

With the aid of the abrasive fluid supply, the abrasive medium layer is fed with abrasive fluid without the need for an externally operated abrasive fluid supply. This saves unnecessary work steps in the removal process and also offers more comfortable handling of the grinding machine or grinding robot.

In addition, it is preferably provided that at least one robot arm is provided at the end of which at least one tool receptacle for at least one abrasive roller is arranged, the tool receptacle preferably being provided with at least one abrasive fluid supply.

As a result, it is possible that the abrasive roller can also be used on hard-to-reach surfaces of the workpiece or negative mold, and additionally the abrasive medium layer is supplied with abrasive fluid.

The objective according to the fifth aspect is solved by the features of claim 12.

It is inventive to use an abrasive segment described above and/or an abrasive roller described above for machining a surface of a workpiece, preferably coated with a coating for protection against environmental influences, preferably providing that at least one area of the workpiece adjacent to the surface to be machined consists of a composite material of carbon fiber and/or fiberglass, or a surface of a negative mold, preferably wax-coated, for the production of a workpiece, which It preferably consists at least in parts of a carbon fiber and/or glass fiber composite material.

The mentioned uses take place particularly advantageously for use in the workpiece, which is configured as an aircraft wing or fuselage, ship parts, train parts or as a rotor blade of a wind turbine.

The mentioned uses take place in another particularly advantageous way by supplying an abrasive fluid, preferably water, particularly preferably water mixed with soap.

Further details and advantages of the present invention are explained in more detail below based on the description of the figures with reference to the exemplary embodiments shown in the drawings. In them they show:

FIG. 1 a is an exploded view of an abrasive segment in its individual components according to a first preferred embodiment in perspective view with a detailed view of a layer of abrasive medium,

FIG. 1b shows a complete abrasive segment according to a second preferred embodiment in perspective view with a detailed view of an elastic felt intermediate layer,

FIG. 2 an entire abrasive roll in perspective view according to a preferred embodiment with mounted abrasive segments according to the embodiment shown in FIG. 1a or FIG. 1b,

FIG. 3a shows a grinding machine according to a first preferred embodiment in the form of a manually operable grinding machine with a mounted grinding roller according to the embodiment shown in FIG. 2 and included grinding segments according to the embodiment shown in FIG. 1a or Figure 1b in a side view,

Figure 3b, the grinding machine according to a second preferred embodiment in the form of a robot-controlled grinding machine with a mounted grinding roller according to the embodiment shown in Figure 2 and included grinding segments according to the example of embodiment shown in Figure 1 a or Figure 1 b in a side view,

Figure 4a, the use of an abrasive roller according to the embodiment shown in Figure 2 with mounted abrasive segments according to the embodiment shown in Figure 1a or Figure 1b during the removal process on a workpiece in a side view,

Figure 4b, the use of an abrasive roller according to the exemplary embodiment shown in Figure 2 with mounted abrasive segments according to the exemplary embodiment shown in Figure 1a or Figure 1b during the removal process in a negative mold in a side view,

FIG. 5 shows a grinding roller according to another preferred embodiment without grinding segments in a view in the radial direction.

Figure 1 a shows an abrasive segment 1, comprising a support body 3 and a flat abrasive medium layer 6, an elastic intermediate layer 7 being arranged between the abrasive medium layer 6 and the support body 3. For the sake of Clarity, these components are separated in the representation, the components are linked to each other, however, through the formation of the abrasive segment.

The support body 3 is configured in the form of a T, the T-shape comprising a dovetail-shaped rib, which is intended for a dovetail connection (see FIG. 2) for positive-lock connection. A length of the supporting body 3 is itself arbitrary. However, particularly preferred lengths are suitable for the removal process of large surface geometries.

The elastic intermediate layer 7 has a parallelepiped configuration. However, it can also deviate from this parallelepiped shape and/or be adapted to special surface geometries to be processed. For example, the elastic intermediate layer 7 can be configured in the shape of a trapezoid.

The abrasive medium layer 6 has a thickness of 16, the abrasive medium layer 6 comprising an abrasive medium 17, preferably diamond 18, cubic boron nitride 19, sintered corundum 52 and/or an abrasive medium 17 with zirconium corundum 20, oxide aluminum 21 and/or silicon carbide 22 .

However, the exact composition of the abrasive medium 17 and the abrasive grain size 18 is itself arbitrary. The abrasive medium 17 particularly preferably has an abrasive grain size 18 of between 50 gm and 745 gm. The abrasive medium 17 is held together by a binder 23. With particular preference, the abrasive medium 17 is incorporated in a resin binder 24, but it can also be incorporated, however, in a material other than the binder 23.

The layer of abrasive medium 6 is arranged on a support layer 49. The material of the support layer 49 is itself arbitrary and is not absolutely necessary. The layer of abrasive medium 6 can also be applied directly to the elastic intermediate layer 7. However, a backing layer 49 of textile material is particularly preferred.

The elastic intermediate layer 7 is attached to the support body 3 and/or to the abrasive layer 6 with an adhesive layer 14. The adhesive layer 14 can be applied over the entire surface or only in areas. The elastic intermediate layer 7 has a thickness 15, the thickness 15 being a multiple greater than a layer thickness 16 of the abrasive medium layer 6.

The thickness 15 particularly preferably has at least three times the layer thickness 16 of the abrasive medium layer 6.

The abrasive layer 6 is applied to the support layer 49. The abrasive layer 6 can be applied to the support layer 49 over the entire surface or only in areas.

Figure 1b shows an abrasive segment 1 with an elastic intermediate layer 7, which consists of felt 8.

The support body 3 comprises a support surface 13, on which the elastic intermediate layer 7 rests at least in parts. The support surface 13 is oriented parallel to the flat abrasive layer 6.

The elastic intermediate layer 7 is configured in such a way that an abrasive fluid 9, in particular water 10, can be stored and released in it and/or is configured free of abrasive medium.

The elastic intermediate layer 7, the support surface 13 and the abrasive medium layer 6 are oriented essentially parallel and have an angle of essentially 90° to a radial direction of an abrasive roller 2 (not shown for reasons of clarity). .

The composition of the abrasive fluid 9 is itself arbitrary. Particularly preferably, in the abrasive fluid 9 there is present a water 10 mixed with soap 48.

The abrasive fluid 9 is stored in the fibers 50 of the felt 8 and penetrates between the fibers 50 of the felt 8 as the abrasive fluid 9 is discharged into the abrasive media layer 6.

In general, the elastic intermediate layer 7 is also possible in the form of foamed materials or plastic materials. The thicknesses of the individual components of the abrasive segment 1 can be configured differently in this case.

FIG. 2 shows an abrasive roller 2 with a cylindrical base body 28 that has a casing surface 5. Abrasive segments 1 are attached to the casing surface 5 in a form-fitting manner.

The surrounding surface 5 is provided with grooves 29 for receiving abrasive segments 1. The grooves 29 have a dovetail-shaped design. The abrasive segments 1 are fixed in the grooves 29 in a positive fit.

A cover 53 is arranged on a front side 30 of the cylindrical base body 28 and has two openings 54. Two locking mechanisms 33 are engaged in these two openings to fix the plurality of abrasive segments 1 in an axial direction.

Two cylindrical openings 31 for a tool receptacle 32 are arranged on a front side 30 of the cylindrical base body 28. The cylindrical openings 31 can be arranged on one or both front sides 30 of the abrasive cylinder 2.

The number of cylindrical openings 31 is itself arbitrary. That exemplary embodiment in which the front side 30 comprises two eccentric cylindrical openings 31 is particularly preferred.

On one of the front sides 30 of the cylindrical base body 28 a locking mechanism 33 is arranged for locking the abrasive segments 1.

The abrasive segments 1 are arranged radially outwards on the surrounding surface 5. The distance 51 between the abrasive segments is itself arbitrary. An equidistant arrangement of the abrasive segments 1 is particularly preferred. The distance 51 between the abrasive segments 1 must not be so great that it impairs the result of the removal process.

The abrasive roll 2 can have a roll diameter in the range between 80 mm and 400 mm. The abrasive roller 2 can have a roller length in the range between 50 mm and 800 mm.

Figure 3a shows a grinding machine 34 with a grinding roller and a rotary drive 35, with which a grinding roller 2 can be set in rotation in order to cause a relative movement 36 of the layer of abrasive medium 6 with respect to the surface 25 of the workpiece 26 and/or the negative mold 27 to be machined.

A handle 35 is provided for manual guidance of the grinding machine 34. The handle 35 is provided with an abrasive fluid supply 36, the abrasive fluid supply 36 being fixed on and/or in the handle 35 in such a way that it does not become prevents the operator from operating the abrasive machine 34.

The handle 35 may be configured for one or two arm operation.

FIG. 3b shows a robot arm 37, at the end 38 of which a tool receptacle 32 of a grinding roller 2 is provided.

The tool housing 32 is provided with an abrasive fluid supply 36. However, in another exemplary embodiment, this can also be mounted on the robot arm 37 or on another component of the abrasive machine 34.

As long as an abrasive fluid supply 36 is not required for the removal process, this can also be completely omitted.

The abrasive fluid 9 is led to the abrasive roller 2 via the abrasive fluid feed 36 .

Figure 4a shows the use of grinding segments 1, of a grinding roller 2 or of a grinding machine 34 for machining a surface 25 of a workpiece 26 coated with a coating 39 for protection against environmental influences.

The workpiece 26 is itself arbitrary in nature. However, it is particularly preferred to use the abrasive segments 1, abrasive roller 2 or abrasive machine 34 for abrasive processing on wings or fuselages 44 of an aircraft, rotor blades 45 of a wind turbine, parts of a ship or parts of a train However, the workpiece 26 can also be made of other extensive geometries 46 of composite materials 47.

An area 40 of the workpiece 26, adjacent to the surface 25 to be machined, consists at least partly of a composite material made of carbon fiber 41 and/or glass fiber 42.

Figure 4b shows a surface 25 coated with wax 43, of a negative mold 27, for producing a workpiece 26 (visible in Figure 4a).

The use takes place with supply of an abrasive fluid 9. However, if necessary, the supply of abrasive fluid 9 can be dispensed with.

Figure 5 shows an abrasive roller 2 before being fitted with abrasive segments 1. The grooves 29, in which the abrasive segments 1 are fitted in a form-fit manner, have an angle in the range between 1° and 10°, particularly preferably between 2° and 3.5°, with respect to a longitudinal direction of the abrasive roller 2, but they can also be arranged parallel to the longitudinal direction of the abrasive roller 2.

The longitudinal direction of the abrasive roller 2 is defined by the axial direction (axis of rotation) of the abrasive roller 2 and is therefore arranged normal to the direction of rotation or a radial direction of the abrasive roller 2. Left two locking mechanisms 33 can be seen on the front side 30. The grooves 29 are continuous up to this front side and end facing an opposite side to allow positive attachment of the abrasive segments 1 (not shown for clarity) on the front side. abrasive roller 2 by finishing the grooves 29. In order to fix the abrasive segments 1 to the abrasive roller 2, the cover 53 is detached through the openings 54 of the locking mechanisms 33 (eg by turning). In Figure 5 this disassembly has already occurred.

The abrasive segments 1 are then inserted into the grooves 29 up to the end of the grooves 29 in order to reattach the cover 53 onto the abrasive roller 2 afterwards and to fix the abrasive segments 1 in the longitudinal direction.

However, it is also possible according to the invention to use two caps 53 for fixing the abrasive segments 1 and to dispense with the termination of the grooves 29.

Claims (15)

Grinding segment (1) for a grinding roller (2), comprising at least one support body (3) for positively fastening (4) of the grinding segment (1) to a surrounding surface (5) of the grinding roller (2) and at least one layer of abrasive medium (6) essentially flat, the at least one layer of abrasive medium (6) being oriented, in a state of the abrasive segment (1) attached to the abrasive roller (2), essentially parallel with respect to the surrounding surface (5) of the abrasive roller (2), characterized in that between the at least one support body (3) and at least one layer of abrasive medium (6) there is arranged at least one elastic intermediate layer ( 7). Abrasive segment (1) according to claim 1, with at least one elastic intermediate layer (7) being arranged between the at least one support body (3) and at least one abrasive medium layer (6), which consists of essentially in felt (8). Abrasive segment (1) according to claim 1, wherein at least one elastic intermediate layer (7) is essentially felt (8) or in the form of foamed material or in the form of plastic material and is formed with a thickness of at least one layer elastic intermediate layer (7) in such a way that an abrasive fluid (9), in particular water (10), can be stored and delivered therein, and/or at least one elastic intermediate layer (7) is configured free of abrasive medium. Abrasive segment (1) according to at least one of the preceding claims, the at least one supporting body (3) being configured essentially T-shaped in cross section and/or in such a way that the supporting body can be fixed in positive connection to the surrounding surface (5) of the abrasive roller (2) by means of a dovetail connection (12) and/or the at least one supporting body (3) comprises at least one bearing surface (13) in which at least one elastic intermediate layer (7) bears at least in regions, preferably at least one bearing surface (13) being oriented essentially parallel to at least one flat abrasive layer (6) and/or or at least one elastic intermediate layer (7) is attached to at least one support body (3) and/or to at least one layer of abrasive medium (6) with an adhesive layer (14). Grinding segment (1) according to at least one of the preceding claims, at least one elastic intermediate layer (7) having a thickness (15), the thickness (15) being at least three times greater than a layer thickness (16). ) of at least one layer of abrasive medium (6). Abrasive segment (1) according to at least one of the preceding claims, comprising at least one layer of abrasive medium (6), at least one abrasive medium (17), preferably diamond (18), cubic boron nitride (19), sintered corundum (52) and/or an abrasive medium (17) with zirconium corundum (20), aluminum oxide (21) and/or silicon carbide (22), the at least one abrasive medium (17) preferably having a abrasive grain size (18) between 50 gm and 745 gm and/or being incorporated in at least one bonding medium (23), preferably a resin bonding medium (24), the abrasive medium layer (6) being preferably arranged on a support layer (49). 7. Abrasive roller (2) for machining a surface (25) of a workpiece (26) and/or a surface (25) of a negative mold (27) for producing the workpiece (26). ), the abrasive roller (2) having an essentially cylindrical base body (28) with an enveloping surface (5), characterized in that at least one abrasive segment (1) is attached positively to the enveloping surface (5) according to the least one of claims 1 to 6. Grinding roller (2) according to claim 7, the outer surface (5) being provided with at least one groove (29) for receiving at least one grinding segment (1), preferably at least one groove (29) ) essentially dovetail-shaped and the at least one abrasive segment (1) being fixed therein in a form-fitting manner, preferably providing that at least one groove (29) is arranged inclined relative to a longitudinal direction of the abrasive roller ( 2), preferably with an angle between 1° and 10°, particularly preferably with an angle between 2° and 3.5°. Grinding roller (2) according to claim 7 or 8, at least one opening (31), preferably substantially cylindrical, being arranged on at least one end face (30) of the essentially cylindrical base body (28) for at least a tool receptacle (32), preferably exactly two openings (31) being arranged in the at least one front side (30). Grinding roller (2) according to at least one of claims 7 to 9, at least one locking mechanism (33), at least one cover (53) and at least one opening (54) being arranged, the opening being arranged in at least one cover (53) and the at least one locking mechanism (33) being able to be inserted into at least one opening (54), for locking the at least one abrasive segment (1) on at least one of the front sides (30) of the essentially cylindrical base body (28). Grinding machine (34) with at least one grinding roller (2) according to one of claims 7 to 10 and at least one rotary drive (35) with which the at least one grinding roller (2) can be rotated to provoke a relative movement (36) of at least one layer of abrasive medium (6) with respect to the surface (25) of the workpiece (26) and/or the negative mold (27) to be machined. Grinding machine (34) according to claim 11, at least one handle (35) being provided, preferably provided with at least one grinding fluid supply (36), for manually guiding the grinding machine (34) and/or being provided at least one robot arm (37), at the end of which (38) is arranged at least one tool receptacle (32) for at least one abrasive roller (2), the tool receptacle (32) preferably being provided with at least a feed of abrasive fluid (36). Use of a grinding segment (1) according to one of Claims 1 to 6 or of a grinding roller (2) according to one of Claims 7 to 10 or of a grinding machine (34) according to Claim 11 or 12 for machining a surface (25) of a workpiece (26), preferably covered with a coating (39) for protection against environmental influences, preferably providing that at least one region (40) of the workpiece (26), that borders the surface (25) to be machined, consisting of a composite material of carbon fiber (41) and/or fiberglass (42) or a surface (25), preferably covered with wax (43), of a negative mold (27) for the production of a workpiece (26), which preferably consists at least in areas of a carbon fiber (41) and/or glass fiber (42) composite material. Use according to claim 13, the workpiece (26) being designed as a wing or fuselage (44) of an aircraft, parts of a ship, parts of a train or as a rotor blade (45) of a wind turbine. Use according to claim 13 or 14, the use taking place with the feed of an abrasive fluid (9), preferably water (10), particularly preferably water mixed with soap (48).