Grinding section for grinding rollers, grinding device and application

Abstract

The invention relates to a grinding segment (1) for a grinding roller (2), comprising: at least one carrier (3) for positively fastening (4) the grinding segment (1) to the circumference (5) of the grinding roller (2); and at least one substantially flat abrasive layer (6), wherein the at least one abrasive layer (6) is oriented substantially parallel to the circumference (5) of the grinding roller (2) when the grinding segment (1) is fastened to the grinding roller (2), and at least one elastic intermediate layer (7) is arranged between the at least one carrier (3) and the at least one abrasive layer (6), wherein the at least one elastic intermediate layer is designed to be abrasive-free.

Description

Technical Field

[0001] The invention relates to a grinding section for a grinding roller, the grinding section comprising: at least one carrier for fastening the grinding section to the circumference of the grinding roller in a form-fitting manner; and at least one substantially flat abrasive layer. The invention also relates to a grinding roller for machining the surface of a workpiece and / or for machining the surface of a negative mold for manufacturing the workpiece, wherein the grinding roller has a substantially cylindrical base body with a circumference. The invention also relates to a grinding machine having at least one grinding roller according to the invention together with a grinding section according to the invention and having at least one rotary drive. The invention also relates to the use of such a grinding section, such a grinding roller or such a grinding machine. Background Art

[0002] Such a grinding segment is already known from DE 20 2005 016 671 U1, in which the abrasive is fastened to a support member with Velcro so that the abrasive layer is oriented perpendicular to the circumference of the grinding roller and the grinding segment deforms elastically in one direction when it comes into contact with the workpiece.

[0003] According to a first aspect, the prior art has the disadvantage that, due to the orientation of the abrasive layer perpendicular to the circumference of the grinding roller during rotation during the grinding process, the removal efficiency is only limited, since the forces generated by the elastic deformation of the grinding segment on the workpiece cannot be optimally transmitted to the workpiece.

[0004] Furthermore, the grinding section follows the contour during the removal process and thus does not contribute significantly to the smoothing of the workpiece surface.

[0005] The grinding section described in document DE 20 2005 016 671 U1 is provided with an elastically deformable supporting component, wherein this is preferably an elastically bendable material such as a brush, foam or other suitable material.

[0006] According to a second aspect, a disadvantage of the prior art is that the elastically bendable material is adapted to the deformation during the grinding process but is not designed for grinding fluid conveyance and / or grinding fluid storage.

[0007] Furthermore, due to the described support members, relevant properties during the removal process, such as vibration damping, sound insulation, thermal protection, varying surface geometries, etc., are only addressed to a limited extent.

[0008] Such a grinding roller is known from DE 20 2005 016 671 U1, which has an attached grinding section which is provided with an abrasive layer oriented perpendicularly to the circumferential surface.

[0009] A disadvantage of the prior art is that material can only be removed in one direction of rotation without reconfiguring the fixed grinding section.

[0010] A grinding machine with a grinding segment is known from DE 20 2005 016 671 U1, in which the grinding segment is arranged in a grinding roller such that the grinding layer is oriented perpendicularly to the circumference of the grinding roller and thus the direction of rotation of the grinding roller after the grinding roller is mounted is determined by the function of the grinding layer.

[0011] The disadvantage here is that, since the abrasive layer is oriented perpendicularly to the circumference of the grinding roller during rotation during the grinding process, an automatic thrust force cannot be generated even in the only possible direction of rotation for the grinding process due to the abrasive layer oriented perpendicularly to the circumference of the grinding roller, which thrust force is preferably necessary for large workpieces in manual processing and also does not allow high removal power to be achieved. Summary of the invention

[0012] The technical object according to a first aspect of the present invention is to provide a grinding section which is improved compared to the prior art, wherein the disadvantages of the prior art are at least partially eliminated and the advantages of the grinding section are in particular that increased material removal can be achieved and that the material removal by the grinding section also contributes to a significant flattening of the workpiece surface.

[0013] According to a second aspect, the technical object is to provide a grinding section which ensures effective grinding fluid supply and grinding fluid storage and is coordinated with parameters relevant to the removal process, such as vibrations, noise, heat, surface shape, without having to give up comfortable handling and / or a long service life and improving the grinding result.

[0014] A further object according to a third aspect of the invention is to specify a grinding roller which is improved compared to the prior art, wherein the disadvantages of the prior art are at least partially eliminated and wherein the advantage of the grinding roller is in particular that it can be used in both directions in relation to the removal process.

[0015] A further object according to a fourth aspect of the invention is to provide a grinding machine which is improved compared to the prior art, wherein the disadvantages of the prior art are at least partially eliminated and the advantages of the grinding machine are not only user-friendly handling in the case of large grinding rollers (from roller lengths and / or roller diameters of approximately 300 mm), but also the high possible removal on the workpiece.

[0016] A further object according to a fifth aspect of the present invention is to specify an improved use of the grinding segment, of the grinding roller or of the grinding machine compared to the prior art.

[0017] The task according to the first aspect is solved by the features of the present invention, and therefore, a grinding segment for a grinding roller is proposed, the grinding segment comprising: at least one carrier for positively fastening the grinding segment to the circumference of the grinding roller; and at least one substantially flat abrasive layer, characterized in that the at least one abrasive layer is oriented substantially parallel to the circumference of the grinding roller when the grinding segment is fastened to the grinding roller, and at least one elastic intermediate layer is provided between the at least one carrier and the at least one abrasive layer.

[0018] According to the invention, the at least one abrasive layer is therefore oriented substantially parallel to the circumference of the grinding roller in the state of the grinding segment fastened to the grinding roller, and at least one elastic intermediate layer is provided between the at least one carrier body and the at least one abrasive layer.

[0019] This makes it possible, firstly, for the contact and thus the force transmission between the abrasive layer and the workpiece surface to take place essentially perpendicularly to the circumference of the grinding roller, thereby ensuring an increased removal performance on the workpiece (e.g. the die and its tool parts) since the grinding section can exert more pressure on the surface.

[0020] Furthermore, the parallel alignment of the abrasive layer to the circumferential surface ensures effective smoothing of the surface to be processed, wherein in particular residues are effectively processed and the surface is locally corrected and smoothed depending on the given conditions in the surrounding area.

[0021] Firstly, after the repair work in the negative molding, unevenness and residues remain due to the compensating material, which can be effectively removed by the grinding section.

[0022] The term elastic (synonymous with compressible while retaining shape) means that the intermediate layer can be compressed under the influence of force and, when no more force is applied, it regains its original shape. This property essentially achieves two advantages, namely that the layer acts in a pressure-balanced manner and exerts a damping effect during grinding.

[0023] The object according to the second aspect is achieved by the features of the invention.

[0024] It is therefore provided that at least one elastic intermediate layer is arranged between the at least one carrier body and the at least one abrasive layer, the at least one elastic intermediate layer being composed essentially of felt.

[0025] This makes it possible, firstly, to achieve, due to the sponge-like structure, a structure of the elastic intermediate layer which is optimized for the removal process both for fluid absorption, fluid storage and fluid discharge.

[0026] Due to the elastic intermediate layer, which consists essentially of felt, the grinding segment can be operated both in dry grinding and also with the use of grinding fluid.

[0027] Furthermore, the elastic properties of the felt have a high degree of compression elasticity and resistance to compression, so that virtually no creases are produced, which could be detrimental to the grinding process.

[0028] In addition, the felt is sound-absorbing and effectively heat-insulating, wherein these properties ensure greater comfort in operation and better grinding results, especially when using the grinding section. In addition, the given soft pad ensures that all relevant components (such as abrasive layer, carrier and / or workpiece) are protected from excessive mechanical loads.

[0029] The adaptation of the properties of the felt to the individual requirements of the surface to be processed can also be controlled via the density of the underlying felt layer.

[0030] Another positive property is that, due to the properties of the specific material of the felt, also areas that are curved to different degrees and / or areas of different thickness can be processed simultaneously without having to previously influence the shape of the curved and / or areas of different thickness in terms of the design of the grinding section and without having to compromise the removal power, which thus also acts on the surface in a particularly leveling manner.

[0031] Furthermore, a grinding section having an elastic intermediate layer made of felt offers the possibility of additionally reaching special and highly loaded curved areas, such as convex or concave geometries, without great expenditure of costs and resources, by virtue of the elastic layer made of felt following the curvature of the workpiece to be machined. The thickness of the elastic layer made of felt can additionally vary in thickness over at least one length dimension of the grinding section.

[0032] The use of felt as a supporting elastic intermediate layer therefore offers the advantage that the pressure of the carrier element required for effective removal can be transferred to the workpiece via the abrasive layer and complex surfaces can be followed in terms of contour.

[0033] The damping properties of the felt, which can be adapted to the given conditions during the removal process by means of a specific composition, allow for user-friendly and comfortable handling of the grinding section, which, due to the low specific density, has virtually no additional weight for handling.

[0034] There is also the positive property that the grinding section deforms elastically to a lesser extent, and this leads to an increase in the service life or minimization of wear phenomena. Therefore, it is possible to dispense with frequent replacement of felt layers and carriers.

[0035] The object according to the third aspect is achieved by the features of the invention.

[0036] According to the invention, it is therefore provided that at least one such grinding segment is fastened in a form-fitting manner to the circumferential surface.

[0037] As a result, it is firstly possible to utilize the specific material properties of the elastic intermediate layer that are beneficial to the grinding process to an optimal extent in both rotational directions, wherein the elastic intermediate layer is made in particular from felt and can therefore ensure damping, sound insulation, pressure balance, thermal protection, fluid absorption / storage / discharge and deformability.

[0038] The object according to the fourth aspect is achieved by the features of the invention.

[0039] Therefore, according to the invention, it is provided that the at least one grinding roller can be set into rotation by means of the at least one rotary drive in order to effect a relative movement of the at least one abrasive layer relative to the surface to be machined of the workpiece and / or of the negative mold.

[0040] This firstly enables the abrasive layer to be oriented substantially parallel to the circumference of the grinding roller and the two directions of rotation to be provided with automatic thrust forces during the grinding process. This enables simple handling of grinding rollers having a slender extension of up to 800 mm.

[0041] Furthermore, due to the elastic intermediate layer, the grinding segment can ensure large-area contact and effective removal of the abrasive layer over the entire elongated extension of the grinding roller.

[0042] According to an advantageous embodiment of the invention, the at least one elastic intermediate layer is designed such that a grinding fluid, in particular water, can be stored and drained therein and / or the at least one elastic intermediate layer is designed to be abrasive-free.

[0043] This results in a particularly advantageous interaction between the initially abrasive-free workpiece surface and the abrasive layer during wet grinding, i.e. the grinding fluid stored in the elastic intermediate layer can escape during the removal process and the grinding dust (which forms on the abrasive layer during the grinding process) can be effectively washed away.

[0044] Additionally, the abrasive can prevent increased heat buildup and thus protect the abrasive layer and the surface of the workpiece and / or the negative mold.

[0045] In the case of workpieces and / or negative molds that do not require grinding fluid during the removal process, additional cleaning work for the user of the grinding section can be omitted due to the abrasive-free elastic intermediate layer.

[0046] Advantageously, provision is made for the at least one support body to be substantially T-shaped in cross section and / or to be designed such that the support body can be fastened in a form-fitting manner to the circumferential surface of the grinding roller via a dovetail connection.

[0047] This makes it possible to achieve a positive connection of the segment to a corresponding groove on the roller, in which the forces acting during the removal process are largely transmitted via the carrier body to the more rigidly designed basic body of the grinding roller.

[0048] By using a dovetail connection, a positive fit is achieved to a greater extent, since the fixation takes place both transversely to the dovetail connection and perpendicularly to the groove.

[0049] In the longitudinal direction of the groove, it is preferably provided that the grinding segment is fixed to the grinding roller by means of a structural lock of the grinding roller.

[0050] It has proven to be advantageous if the at least one carrier body comprises at least one bearing surface on which the at least one elastic intermediate layer is supported at least in regions, preferably the at least one bearing surface being oriented substantially parallel to the at least one planar abrasive layer.

[0051] Since this arrangement ensures that both the abrasive layer and the carrier are aligned parallel to the circumferential surface of the grinding roller, the forces necessary for the removal process and generated during the forward process act to a large extent in the radial direction of the grinding roller. This is advantageous for an efficient and user-friendly removal process.

[0052] According to a preferred embodiment of the present invention, it is provided that the at least one elastic intermediate layer is fastened to the at least one carrier body and / or the at least one abrasive layer by means of an adhesive layer.

[0053] The adhesive layer is cost-effective as an adhesive on the one hand and is functionally sufficient for demanding removal processes.

[0054] After the service life of the carrier body, the elastic intermediate layer or the abrasive layer has expired, the adhesive layer allows for rapid replacement of worn parts without requiring a high amount of material.

[0055] It has proven to be advantageous if the at least one elastic intermediate layer has a thickness, wherein the thickness is at least three times greater than the layer thickness of the at least one abrasive layer.

[0056] Particularly preferably, the abrasive layer has a layer thickness in the range between 0.6 mm and 1.5 mm.

[0057] Particularly preferably, the elastic intermediate layer has a thickness in the range between 5 mm and 12 mm, particularly preferably in the range between 8 mm and 10 mm.

[0058] In this way, it is possible to prevent contact between the carrier and the surface of the workpiece or of the negative mold from occurring in the event of strong surface irregularities of the workpiece or of the negative mold.

[0059] Furthermore, the elastic intermediate layer develops the full extent of its active material-specific aspects for the removal process starting from a certain thickness.

[0060] An advantageous variant for machining the surface of a workpiece or a negative mold made of a composite material is that the at least one abrasive layer comprises at least one abrasive, preferably diamond, cubic boron nitride, sintered corundum, and / or the at least one abrasive layer comprises an abrasive having zirconium corundum, aluminum oxide and / or silicon carbide, preferably the at least one abrasive has an abrasive grain size between 50 μm and 745 μm, and / or is embedded in at least one binder, preferably a resin binder, preferably the abrasive layer is arranged on a carrier layer.

[0061] Particularly preferably, the circumferential surface is provided with at least one groove for receiving at least one grinding segment, preferably the at least one groove in this embodiment is substantially dovetail-shaped and the at least one grinding segment is fixed in the at least one groove in a form-fitting manner.

[0062] In one embodiment, it is provided that the at least one groove is arranged obliquely with respect to the longitudinal direction of the grinding roller, preferably at an angle of between 1° and 10°, particularly preferably between 2° and 3.5°.

[0063] This ensures a particularly harmonious grinding process, since an advantageous force transmission of the at least one grinding segment to the workpiece takes place both during the initial contact of the grinding roller with the workpiece and during the grinding process, and lower impact-like forces are generated.

[0064] Furthermore, the angle of the at least one groove makes it possible for a subsequent grinding segment to already be in contact with the workpiece at the end of the grinding contact of a first grinding segment, thereby reducing the time during which the workpiece is not in contact with the at least one grinding segment.

[0065] The grinding effect is thus improved by the inclined attitude of the at least one groove to the longitudinal direction of the grinding roller and the grinding section located in the at least one groove.

[0066] Since the carrier of the grinding segment is designed essentially in a T-shaped manner, the at least one corresponding groove provides a non-positive connection for the grinding segment on the circumference of the grinding roller. The dovetail-shaped connection here provides a reliable and non-positive connection of the grinding segment to the grinding roller, primarily under high loads during the removal process.

[0067] In one embodiment of the invention, it is provided that at least one, preferably substantially cylindrical, opening for at least one tool holder is provided on at least one end side of the substantially cylindrical main body, preferably exactly two openings are provided on the at least one end side.

[0068] This achieves the effect that the grinding roller can be used as a tool for different grinding machines or grinding robots.

[0069] Furthermore, a quick change of grinding rollers, grinding machines or grinding robots is possible.

[0070] This is primarily a relevant factor for reasons of time and cost when machining the surface of the workpiece and / or the negative mold.

[0071] By arranging the opening on the end side, it is possible for the grinding section to extend over the entire transverse extension of the grinding roller.

[0072] If exactly two openings are provided on the end face, commercially available tool holders are conceivable.

[0073] Due to the resulting lever arm between the opening and the center of the end face, during the removal process, tangentially acting forces caused by the rotation of the grinding roller and the relative movement between the grinding section and the surface can also be transmitted and compensated to a large extent via the tool holder to the grinding machine or grinding robot.

[0074] According to a preferred embodiment of the present invention, at least one locking mechanism, at least one cover plate and at least one opening are provided, wherein the opening is arranged in the at least one cover plate and the at least one locking mechanism can be introduced into the at least one opening in order to lock the at least one grinding section on at least one end side among the end sides of the essentially cylindrical base body.

[0075] This ensures a more effective positive and non-positive connection between the grinding segment and the grinding roller.

[0076] Due to the arrangement of the main body on the end face, the locking can also be carried out in a user-friendly manner even after the installation on the grinding roller or the grinding robot.

[0077] Alternatively, it is also possible to provide at least one handle for manually guiding the grinding machine, the at least one handle preferably being provided with at least one grinding fluid feed.

[0078] The handle ensures comfortable use even with large and heavy grinding rollers.

[0079] By means of the grinding fluid supply, the grinding fluid is supplied to the abrasive layer without externally operated grinding fluid supply. This saves unnecessary work steps in the removal process and also provides for comfortable use of the grinding machine or grinding robot.

[0080] Furthermore, it is preferably provided that at least one robot arm is provided, at the end of which at least one tool holder for at least one grinding roller is provided, the tool holder preferably being provided with at least one grinding fluid supply.

[0081] This makes it possible to use the grinding roller even on surfaces of workpieces or negative molds that are difficult to access and to additionally supply the abrasive layer with grinding fluid.

[0082] The object according to the fifth aspect is achieved by the features of the invention.

[0083] According to the invention, the above-mentioned grinding section or the above-mentioned grinding roller or the above-mentioned grinding machine is used for processing the surface of a workpiece, which surface is preferably coated with a coating for protection against environmental influences, wherein it is preferably provided that at least one area of ​​the workpiece adjacent to the surface to be processed is made of a carbon fiber composite material and / or a glass fiber composite material; or for processing the preferably wax-coated surface of a negative mold for producing a workpiece, which workpiece is preferably made of a carbon fiber composite material and / or a glass fiber composite material at least in sections.

[0084] The aforementioned application is used in a particularly advantageous manner on workpieces which are designed as wings or fuselages of aircraft, as parts of ships, as parts of trains or as rotor blades of wind turbines.

[0085] The aforementioned use is carried out in another particularly advantageous manner with the supply of a grinding fluid, preferably water, particularly preferably water mixed with soap. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Further details and advantages of the invention are explained in more detail below with reference to the exemplary embodiments shown in the drawings. In the drawings:

[0087] Figure 1a An exploded view of the individual components of the grinding section according to a first preferred embodiment is shown in a perspective view with a detailed view of the abrasive layer,

[0088] Figure 1b The grinding section according to a second preferred embodiment is shown in its entirety in a perspective view with a detail view of an elastic intermediate layer made of felt,

[0089] Figure 2 A grinding roller according to a preferred exemplary embodiment is shown overall in a perspective view, with a mounting according to Figure 1a or the grinding segment of the exemplary embodiment shown in 1b,

[0090] Figure 3a A grinding machine in the form of a manually operable grinding machine according to a first preferred embodiment is shown in side view, the grinding machine having an assembled grinding machine according to Figure 2 The grinding roller of the embodiment shown in FIG. Figure 1a or the grinding section of the embodiment shown in 1b,

[0091] Figure 3b A grinding machine in the form of a robot-controlled grinding machine according to a second preferred embodiment is shown in side view, the grinding machine having an assembled grinding machine according to Figure 2 The grinding roller of the embodiment shown in FIG. Figure 1a or Figure 1b The grinding section of the embodiment shown in FIG.

[0092] Figure 4a A side view showing the Figure 2 The use of a grinding roller of the embodiment shown in the figure on a workpiece during removal, the grinding roller having an assembly according to Figure 1a or Figure 1b The grinding section of the embodiment shown in FIG.

[0093] Figure 4b A side view showing the Figure 2 The use of a grinding roller of the embodiment shown in FIG. 1 on a negative mold during removal, the grinding roller having an assembly according to Figure 1a or Figure 1b The grinding section of the embodiment shown in FIG.

[0094] Figure 5 A grinding roller without a grinding segment according to a further preferred embodiment is shown in a view in the radial direction. DETAILED DESCRIPTION

[0095] Figure 1a A grinding segment 1 is shown, which comprises a carrier body 3 and a planar abrasive layer 6, wherein an elastic intermediate layer 7 is arranged between the abrasive layer 6 and the carrier body 3. For reasons of clarity, these components are shown separated in the illustration, but the segments are connected to one another by forming the grinding segment.

[0096] The carrier 3 is designed in a T-shape, wherein the T-shape comprises a dovetail-shaped web which is intended for a dovetail connection (see Figure 2) for a positive connection. The length of the carrier 3 itself is arbitrary, but a length suitable for the removal process of a wide range of surface geometries is particularly preferred.

[0097] The elastic intermediate layer 7 is designed as a square. However, the elastic intermediate layer can also deviate from this square shape and / or be adapted to the special surface geometry to be processed. For example, the elastic intermediate layer 7 can be designed as a trapezoid.

[0098] The abrasive layer 6 has a thickness 16 , wherein the abrasive layer 6 comprises an abrasive 17 , preferably diamond 18 , cubic boron nitride 19 , sintered corundum 52 and / or an abrasive 17 comprising zirconium corundum 20 , aluminum oxide 21 and / or silicon carbide 22 .

[0099] However, the exact composition of the abrasive 17 and the abrasive grain size 18 itself are arbitrary. Particularly preferably, the abrasive 17 has an abrasive grain size 18 between 50 μm and 745 μm. The abrasives 17 are held together by a binder 23. Particularly preferably, the abrasives 17 are embedded in a resin binder 24, but can also be embedded in other materials as a binder 23.

[0100] The abrasive layer 6 is arranged on the carrier layer 49. The material of the carrier layer 49 is arbitrary and not necessarily necessary. The abrasive layer 6 can also be applied directly on the elastic intermediate layer 7. However, it is particularly preferred that the carrier layer 49 is made of fabric.

[0101] The elastic intermediate layer 7 is fastened to the carrier body 3 and / or to the abrasive layer 6 by means of an adhesive layer 14. In this case, the adhesive layer 14 can be applied over the entire surface or only in certain areas.

[0102] The elastic intermediate layer 7 has a thickness 15, wherein the thickness 15 is several times greater than the layer thickness 16 of the abrasive layer 6. Particularly preferably, the thickness 15 is at least three times greater than the layer thickness 16 of the abrasive layer 6.

[0103] The abrasive layer 6 is applied on the carrier layer 49. The abrasive layer 6 can be applied on the carrier layer 49 over the entire surface or only in certain areas.

[0104] Figure 1b A grinding segment 1 is shown having an elastic intermediate layer 7 which is produced from felt 8 .

[0105] The carrier body 3 comprises a support surface 13 on which the elastic intermediate layer 7 is supported at least in certain areas. The support surface 13 is oriented parallel to the planar abrasive layer 6 .

[0106] The elastic intermediate layer 7 is designed in such a way that a grinding fluid 9 , in particular water 10 , can be stored and drained therein and / or is designed to be abrasive-free.

[0107] The elastic intermediate layer 7 , the support surface 13 and the abrasive layer 6 are oriented substantially parallel and have an angle of substantially 90° with the radial direction of the grinding roller 2 (not shown for the sake of clarity).

[0108] The composition of the grinding fluid 9 itself is arbitrary. Particularly preferably, water 10 mixed with soap 48 is present in the grinding fluid 9 .

[0109] The grinding fluid 9 is stored in the fibers 50 of the felt 8 and penetrates between the fibers 50 of the felt 8 when the grinding fluid 9 is discharged into the abrasive layer 6 .

[0110] In general, elastic intermediate layer 7 can also be in the form of a foam material or a plastic. The thickness of the individual components of grinding segment 1 can be designed to be different.

[0111] Figure 2 A grinding roller 2 is shown having a cylindrical base body 28 which has a circumferential surface 5 . The grinding segment 1 is fastened to the circumferential surface 5 in a form-fitting manner.

[0112] The circumferential surface 5 is provided with a groove 29 for receiving the grinding segment 1. The groove 29 is designed in the form of a dovetail groove in this embodiment. The grinding segment 1 is fixed in the groove 29 in a form-fitting manner.

[0113] Cover plate 52 is arranged on end side 30 of cylindrical base body 28 and has two openings 54 , into which two locking means 33 engage in order to fix a plurality of grinding segments 1 in the axial direction.

[0114] Two cylindrical openings 31 for tool receptacles 32 are provided on the end side 30 of the cylindrical main body 28. The cylindrical openings 31 can be provided on one end side 30 or on both end sides of the grinding roller 2.

[0115] The number of cylindrical openings 31 is arbitrary. Particularly preferred is that embodiment in which the end face 30 comprises two eccentric cylindrical openings 31 .

[0116] A locking mechanism 33 is provided on one of the end faces 30 of cylindrical base body 28 for locking grinding segment 1 .

[0117] The grinding segments 1 are arranged radially outward on the circumferential surface 5. The spacing 51 between the grinding segments is arbitrary. An equidistant arrangement of the grinding segments 1 is particularly preferred. The spacing 51 between the grinding segments 1 should not be selected to be so large that the effect of the removal process is impaired.

[0118] The grinding roller 2 can have a roller diameter in the range between 80 mm and 400 mm. The grinding roller 2 can have a roller length in the range between 50 mm and 800 mm.

[0119] Figure 3a A grinding machine 34 is shown having a grinding roller and a rotary drive 35 a by means of which the grinding roller 2 can be set into rotation in order to effect a relative movement 36 a of the abrasive layer 6 relative to the surface 25 to be machined of the workpiece 26 and / or of the die 27 .

[0120] There is a handle 35 b for manually guiding the grinding machine 34 . The handle 35 b is provided with a grinding fluid feed 36 b , wherein the grinding fluid feed 36 b is fastened to and / or in the handle 35 b so that an operator is not hindered when maneuvering the grinding machine 34 .

[0121] The handle 35b can be designed for single-handed operation or two-handed operation.

[0122] Figure 3b A robot arm 37 is shown, at the end 38 of which the tool holder 32 of the grinding roller 2 is arranged.

[0123] The tool receiving portion 32 is provided with a grinding fluid delivery portion 36 b. However, in another embodiment, the grinding fluid delivery portion can also be mounted on the robot arm 37 or on another component of the grinding machine 34. As long as the grinding fluid delivery portion 36 b is not necessary for the removal process, the grinding fluid delivery portion can also be completely omitted.

[0124] The grinding fluid 9 is further introduced toward the grinding roller 2 via the grinding fluid conveying portion 36 b .

[0125] Figure 4a The use of a grinding section 1 , a grinding roller 2 or a grinding machine 34 for machining a surface 25 of a workpiece 26 , which is coated with a coating 39 for protection against environmental influences, is shown.

[0126] The workpiece 26 itself is of any design. However, it is particularly preferred to use the grinding section 1, the grinding roller 2 or the grinding machine 34 for a grinding process of an aircraft wing or fuselage 44, a rotor blade 45 of a wind turbine, a component of a ship or a component of a train. However, the workpiece 26 can also be formed from other wide-ranging geometric structures 46 made of a composite material 47.

[0127] A region 40 of the workpiece 26 which adjoins the surface 25 to be processed is produced at least partially from a carbon fiber composite material 41 and / or a glass fiber composite material 42 .

[0128] Figure 4bThe surface 25 (in the figure) of a negative mold 27 for producing a workpiece 26 coated with wax 43 is shown. Figure 4a (see ).

[0129] The use is carried out with the supply of grinding fluid 9. However, if necessary, the supply of grinding fluid 9 can be dispensed with.

[0130] Figure 5 The grinding roller 2 is shown before the grinding section 1 is equipped.

[0131] Groove 29 in which grinding segment 1 is fixed in a form-fitting manner has an angle with the longitudinal direction of grinding roller 2 in the range of between 1° and 10°, particularly preferably between 2° and 3.5°, but can also be arranged parallel to the longitudinal direction of grinding roller 2 .

[0132] The longitudinal direction of the grinding roller 2 is defined by the axial direction (axis of rotation) of the grinding roller 2 and is therefore perpendicular to the rotational direction or radial direction of the grinding roller 2 .

[0133] On the left, the locking means 33 can be seen on the end side 30. The groove 29 is continuous as far as the side facing the end side and ends before the opposite side, so that the locking portion of the groove 29 can achieve a positive lock of the grinding segment 1 (not shown for the sake of clarity) in the grinding roller 2.

[0134] In order to fasten the grinding section 1 to the grinding roller 2, the cover plate 53 is released from the locking mechanism 33 via the opening 54 (for example by rotating it). Figure 5 , the disassembly has already been carried out.

[0135] The grinding segment 1 is subsequently introduced into the groove 29 up to the end of the groove 29 in order to subsequently fasten the cover plate 53 again on the grinding roller 2 and fix the grinding segment 1 in the longitudinal direction.

[0136] However, it is also possible according to the invention to use two cover plates 53 for fixing grinding segment 1 and to dispense with the closure of groove 29 .

Claims

1. A grinding section (1) for a grinding roller (2), the grinding section comprising: at least one carrier (3) for positively fastening the grinding segment (1) to the circumferential surface (5) of the grinding roller (2); and at least one substantially flat abrasive layer (6), characterized in that the at least one abrasive layer (6) is oriented substantially parallel to the circumferential surface (5) of the grinding roller (2) when the grinding segment (1) is fastened to the grinding roller (2), and at least one elastic intermediate layer (7) is provided between the at least one carrier (3) and the at least one abrasive layer (6), wherein the at least one elastic intermediate layer is designed to be abrasive-free.

2. The grinding segment (1) according to claim 1, wherein: At least one elastic intermediate layer (7) is arranged between the at least one carrier (3) and the at least one abrasive layer (6), and the at least one elastic intermediate layer is essentially made of felt (8).

3. The grinding segment (1) according to claim 1 or 2, wherein: The at least one elastic intermediate layer (7) is designed such that a grinding fluid (9) can be stored and discharged in the at least one elastic intermediate layer.

4. The grinding segment (1) according to claim 3, wherein: The grinding fluid (9) is water (10).

5. The grinding segment (1) according to claim 1 or 2, wherein: The cross section of the at least one support body (3) is substantially T-shaped and / or the cross section of the at least one support body is configured such that the support body can be fastened to the circumference (5) of the grinding roller (2) in a form-fitting manner via a dovetail connection (12).

6. The grinding segment (1) according to claim 1 or 2, wherein: The at least one carrier (3) comprises at least one supporting surface (13) on which the at least one elastic intermediate layer (7) is at least partially supported.

7. The grinding segment (1) according to claim 6, wherein: The at least one supporting surface (13) is oriented substantially parallel to the at least one planar abrasive layer (6).

8. The grinding segment (1) according to claim 1 or 2, wherein: The at least one elastic intermediate layer (7) is fastened to the at least one carrier (3) and / or to the at least one abrasive layer (6) by means of an adhesive layer (14).

9. The grinding segment (1) according to claim 1 or 2, wherein: The at least one elastic intermediate layer (7) has a thickness (15), wherein the thickness (15) is at least three times greater than the layer thickness (16) of the at least one abrasive layer (6).

10. The grinding segment (1) according to claim 1 or 2, wherein: The at least one abrasive layer (6) comprises at least one abrasive (17).

11. The grinding segment (1) according to claim 10, wherein: The at least one abrasive (17) is: diamond (18), cubic boron nitride (19), sintered corundum (52) and / or an abrasive (17) comprising zirconium corundum (20), aluminum oxide (21) and / or silicon carbide (22).

12. The grinding segment (1) according to claim 10, wherein: The at least one abrasive (17) has an abrasive grain size (18) between 50 μm and 745 μm and / or is embedded in at least one binder (23).

13. The grinding segment (1) according to claim 12, wherein: The at least one binder (23) is a resin binder (24).

14. The grinding segment (1) according to claim 10, wherein: The abrasive layer (6) is arranged on a supporting layer (49).

15. A grinding roller (2) for machining the surface of a workpiece (26) and / or for machining the surface of a negative mold (27) for producing the workpiece (26), wherein: The grinding roller (2) has a substantially cylindrical base body (28) with a circumferential surface (5), characterized in that at least one grinding segment (1) according to any one of claims 1 to 14 is fastened in a form-fitting manner to the circumferential surface (5).

16. The grinding roller (2) according to claim 15, wherein: The circumferential surface (5) is provided with at least one groove (29) for receiving at least one grinding segment (1).

17. The grinding roller (2) according to claim 16, wherein: The at least one groove (29) is designed essentially in the shape of a dovetail groove, and the at least one grinding segment (1) is fixed in the at least one groove in a form-fitting manner.

18. The grinding roller (2) according to claim 16, wherein: The at least one groove (29) is arranged obliquely with respect to the longitudinal direction of the grinding roller (2).

19. The grinding roller (2) according to claim 18, wherein: The at least one groove (29) is arranged obliquely at an angle of between 1° and 10° relative to the longitudinal direction of the grinding roller (2).

20. The grinding roller (2) according to claim 19, wherein: The at least one groove (29) is arranged obliquely at an angle of between 2° and 3.5° relative to the longitudinal direction of the grinding roller (2).

21. The grinding roller (2) according to any one of claims 15 to 20, wherein: At least one opening (31) for at least one tool receptacle (32) is provided on at least one end side (30) of the substantially cylindrical main body (28).

22. The grinding roller (2) according to claim 21, wherein: The at least one opening (31) is substantially cylindrical.

23. The grinding roller (2) according to claim 21, wherein: Exactly two openings (31) are provided on the at least one end side (30).

24. The grinding roller (2) according to any one of claims 15 to 20, wherein At least one locking mechanism (33), at least one cover plate (53) and at least one opening (54) are provided, wherein the opening is arranged in the at least one cover plate (53) and the at least one locking mechanism (33) can be introduced into the at least one opening (54) in order to lock the at least one grinding segment (1) on at least one of the end sides (30) of a substantially cylindrical base body (28).

25. A grinding machine (34), comprising at least one grinding roller (2) according to any one of claims 15 to 24 and at least one rotary drive (35a), by means of which the at least one grinding roller (2) can be set in rotation in order to cause a relative movement (36a) of the at least one abrasive layer (6) relative to the surface to be processed of the workpiece (26) and / or the die (27).

26. The grinding machine (34) according to claim 25, wherein At least one handle (35b) is provided for manually guiding the grinding machine (34).

27. The grinding machine (34) according to claim 26, wherein: The at least one handle is provided with at least one grinding fluid delivery portion (36b).

28. The grinding machine (34) according to any one of claims 25 to 27, wherein: At least one robot arm (37) is provided, at the end (38) of which at least one tool holder (32) for at least one grinding roller (2) is provided.

29. The grinding machine (34) according to claim 28, wherein The tool receiving portion (32) is provided with at least one grinding fluid delivery portion (36b).

30. Use of a grinding segment (1) according to any one of claims 1 to 14 or a grinding roller (2) according to any one of claims 15 to 24 or a grinding machine (34) according to any one of claims 25 to 29 for machining the surface of a workpiece (26) or for machining the surface of a negative mold (27) for producing a workpiece (26).

31. The use according to claim 30, wherein: The surface is coated with a coating (39) for protection against environmental influences.

32. The use according to claim 30, wherein: It is provided that at least one region (40) of the workpiece (26) which adjoins the surface to be processed is produced from a carbon fiber composite material (41) and / or a glass fiber composite material (42).

33. The use according to claim 30, wherein: The surface of the negative mold (27) for producing the workpiece (26) is coated with wax (43).

34. The use according to claim 33, wherein: The workpiece is at least partially made of a carbon fiber composite material (41) and / or a glass fiber composite material (42).

35. The use according to claim 30, wherein: The workpiece (26) is designed as a wing or fuselage (44) of an aircraft, as a component of a ship, as a component of a train, or as a rotor blade (45) of a wind turbine.

36. Use according to any one of claims 30 to 35, wherein The application is carried out while supplying grinding fluid (9).

37. The use according to claim 36, wherein: The grinding fluid (9) is water (10).

38. The use according to claim 36, wherein: The grinding fluid (9) is water mixed with soap (48).

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