SPACER DEVICE FOR A GRINDING ROLLER

Abstract

A spacer device for a grinding roller, in particular of a grinding machine, including a main body to which at least two rolling bodies are rotatably mounted and wherein the spacer device can be supported by way of the at least two rolling bodies against a surface to be ground during a grinding process. At least one fixing device is arranged, preferably centrally, between the at least two rolling bodies and with which the grinding roller can be preferably releasably fixed to the spacer device. Furthermore, an adjusting device allows the grinding roller in a state of being fixed to the spacer device to be adjustable relative to the main body and/or at least one of the at least two rolling bodies.

Description

BACKGROUND OF THE INVENTION

The invention concerns a spacer device for a grinding roller, in particular of a grinding machine. In addition the invention concerns an arrangement comprising at least one such spacer device and a grinding roller, wherein the at least one grinding roller is or can be fixed to the at least one spacer device by way of the at least one fixing device. Furthermore, the invention concerns a grinding machine comprising at least one such arrangement and a drive device and/or a guide device, wherein a radial spacing of the at least one grinding roller relative to the main body and/or at least one of the at least two rolling bodies is adjustable by the adjusting device of the at least one spacer device. The invention also concerns the use of such a grinding machine and/or such an arrangement.

In regard to grinding machines and grinding rollers which are known for example from WO 2021/007603 A1 or WO 2017/143370 A1 precise and unvarying adjustment of a spacing of the grinding roller relative to a workpiece to be worked is essential in order to be able efficiently to achieve high quality of the workpiece to be worked. In practice, that is not possible to an adequate degree, in which case in particular comfort in handling the grinding machine/grinding roller when dealing with large workpieces, heavy grinding machines/grinding rollers and possibly curved surfaces of the workpieces is imperative for careful treatment of an operator of the grinding roller.

A grinding machine having a grinding brush with radial adjustability is already known from EP 2 206 580 A2 in which to mount a grinding brush there is provided a carriage-like device having wheels. A manually actuable guide device in the form of a height-adjustable push rod is provided for an advance movement of the grinding brush, wherein runner wheels can be provided at the side of the carriage-like device, that faces away from the grinding brush, the carriage-like device being intended to maintain an unvarying spacing of the grinding brush relative to a floor surface when the grinding brush is correctly pivoted around the runner wheels. Near the grinding brush a guide wheel can be used, by way of which a height of the grinding brush above the floor surface is adjustable during application of fluid by bearing down on the guide wheel. In that arrangement the guide wheel can be raised or lowered by way of an adjusting device. Finally abrasive removal on the part of the grinding brush is adjusted by way of a pressing pressure applied by an operator.

A disadvantage with the state of the art is that the carriage-like device in combination with the push rod is uncomfortable, in particular in relation to curved surfaces to be worked, as the angle of the push rod relative to the grinding roller over a geometrical configuration of the surface changes in an adverse fashion and as a result the transmission of force by the operator is inefficient. In addition the height adjustment of the push rod is only limitedly user-friendly, in particular as, by virtue of the parameters: the pressing pressure applied to the grinding roller, the pivotal position of the carriage-like device and the large number of degrees of freedom in the height adjustment of the individual wheels, spacing of the grinding roller from the surface is time-consuming by virtue of the amount of adjustment steps required. In addition the structural configuration and arrangement of the runner wheels does not afford a defined height adjustment of the grinding roller, which permits a spacing of the grinding roller that is constant during operation, with the pressing pressure remaining the same.

SUMMARY OF THE INVENTION

The technical object of the present invention is therefore that of providing a spacer device which is improved over the state of the art, an arrangement comprising the spacer device and a grinding roller and a grinding machine, in which the disadvantages of the state of the art are at least partially overcome and which are distinguished in particular by simple adjustment of the spacing of the grinding roller relative to the spacer device in order to be able to ensure a constant spacing and a constant pressing pressure in respect of the grinding roller with varying pivotal positions of the grinding machine.

Thus, in accordance with the invention, at least one fixing device is arranged, preferably centrally, between the at least two rolling bodies and with which the grinding roller can be preferably releasably fixed to the spacer device. In addition, at least one adjusting device with which the grinding roller in a state of being fixed to the spacer device is adjustable relative to the main body and/or at least one of the at least two rolling bodies.

That makes it possible for the first time that adjustment of the spacing of the grinding roller relative to the spacer device generates a defined spacing of the grinding roller relative to a surface of a workpiece, which permits an unvarying pressing pressure in respect of the grinding roller and in relation to different pivotal positions of the at least one fixing device as the interface between the grinding roller and the spacer device relative to the main body—for example when processing curved surfaces of a workpiece—automatically permits a spacing which remains constant.

The spacer device can be used in relation to planar, convex or concave surfaces, in which respect grinding roller is to be interpreted sufficiently widely that brush grinding rollers, grinding rollers with separate grinding rollers, grinding rolllers with grinding segments and the like are embraced.

As stated in the opening part of this specification, protection is also sought for an arrangement comprising at least one such spacer device and at least one grinding roller, wherein the at least one grinding roller is or can be fixed to the at least one spacer device by way of the at least one fixing device.

As stated in the opening part of this specification, protection is also sought for a grinding machine comprising at least one such arrangement and a drive device and/or guide device, wherein a radial spacing of the at least one grinding roller relative to the main body and/or at least one of the at least two rolling bodies is adjustable by the adjusting device of the at least one spacer device.

If an axis of rotation of the grinding roller at different heightwise settings of the grinding roller remains substantially identical to a joint axis of the spacer device then the grinding machine can be moved and/or pivoted flexibly in space, wherein a uniform spacing relative to the workpiece is always made possible by contacting of the rolling bodies with the surface.

As stated in the opening part of this specification, protection is also sought for use of such a grinding machine and/or such an arrangement for processing a surface of a workpiece, that is preferably coated with a coating for protection from environmental influences, wherein it is preferably provided that at least one region of the workpiece, that adjoins the surface to be worked, comprises a carbon fiber and/or glass fiber composite material or a preferably wax-coated surface of a negative form for the production of a workpiece which preferably at least region-wise comprises a carbon fiber and/or glass fiber composite material.

According to an advantageous configuration of the invention, the grinding roller in the state of being fixed to the spacer device is rotatable relative to the main body about a joint axis of the spacer device, and the joint axis is substantially congruent with an axis of rotation of the grinding roller.

In the state of the art, the spacing of the grinding roller is dependent on the pressing pressure, the pivotal position and the orientation of the grinding machine. Advantageously, by virtue of the at least substantially coincident axes, the spacing or the pressing pressure of the grinding roller from the workpiece is not altered upon a pivotal movement of the at least one fixing device whereby comfort in terms of handling the grinding roller/grinding machine is significantly enhanced, in particular in relation to curved surfaces or heavy components.

Advantageously, the grinding roller in the state of being fixed to the spacer device is axially spaced from the adjusting device, wherein a pivot axis of the at least one fixing device with respect to the adjusting device is substantially congruent with an axis of rotation of the grinding roller.

It has proven to be advantageous if the main body is arranged spaced radially from an axis of rotation of the grinding roller in the state of the grinding roller of being fixed to the spacer device.

The radial spacing can be defined in user-friendly fashion by way of the adjusting device. An axial spacing between the grinding roller and the main body can be defined for example by way of the at least one fixing device.

According to an advantageous embodiment of the invention it is provided that the main body has at least two mutually spatially separate rolling body receiving means, between which the at least one fixing device is arranged.

With at least two rolling bodies a tilting movement with a change linked thereto in the spacing (as would be the case for example with only one wheel) is prevented. The at least two rolling body receiving means can be generally designed to follow a contour of the workpiece to be worked or a grinding roller geometry or independently thereof.

It has proven to be advantageous if the adjusting device includes the main body and an adjustment apparatus which can be releasably fixed to the main body and/or which is preferably laterally displaceable. The main body has a receiving means for at least region-wise arrangement of the adjustment apparatus within the receiving means, and preferably arranged on the main body and/or the adjustment apparatus is a scale for indicating a spacing of the grinding roller relative to the main body and/or at least one of the at least two rolling bodies.

The adjustment apparatus preferably includes the joint axis about which the grinding roller is pivotable together with the fixing device, wherein the axis of rotation of the grinding roller preferably remains congruent with the joint axis or the pivot axis. The adjustment apparatus however can generally also be connected in material-bonded relationship to the main body, wherein the adjusting device can be formed from the main body and the at least one fixing device to be joined thereto.

An advantageous variant provides that the at least one fixing device is arranged, preferably by way of a fixing means, directly hingedly to the adjustment apparatus and/or indirectly by way of the adjustment apparatus to the main body.

Particularly preferably, the adjusting device, preferably the main body and/or an adjustment apparatus which is possibly present has at least one and preferably precisely two longitudinal grooves which are arranged parallel to each other and/or at least one guide rail, by way of which the grinding roller in the state of being fixed to the spacer device is adjustable relative to the main body and/or at least one of the at least two rolling bodies, preferably by way of the adjustment apparatus which is possibly provided.

By way of securing of the at least one fixing device along the at least one longitudinal groove and/or at least one guide rail a spacing of the grinding roller relative to the main body or rolling body can be particularly advantageously adjusted. Other adjustment options (and associated fixing options) are also conceivable.

In an embodiment of the invention, the adjusting device has at least one fixing means, preferably a screw connection and/or clamping connection for fixing a radial spacing of the main body and/or at least one of the at least two rolling bodies from the grinding roller in the state of the grinding roller of being fixed to the spacer device.

A preferred embodiment of the invention provides that the main body has at least one curvature portion and there are provided at least three rolling bodies, preferably at least five rolling bodies, wherein the at least three rolling bodies are arranged at the at least one curvature portion.

Particularly, when a curvature of the curvature portion or a curvature sub-portion is adapted to a grinding roller diameter with a desired spacing then upon a pivotal movement of the grinding machine the pressing pressure and the spacing of the grinding roller relative to the workpiece can be kept constant. The grinding roller can be supported on different rolling bodies for example upon a pivotal movement. The curvature portion is particularly preferably convex.

It has proven to be desirable in the arrangement that a radial spacing of the at least one grinding roller relative to the at least one main body and/or at least one of the at least two rolling bodies is adjustable by the at least one adjusting device, preferably by way of a lateral and relative movement of the at least one grinding roller with respect to the at least one main body and/or at least one of the at least two rolling bodies.

It is further preferable that the at least one fixing device has at least two mutually spatially spaced mounting devices to which the at least one grinding roller is or can be axially fixed.

The at least two mounting devices provide that, for example, a change of grinding rollers of different grinding roller diameters can be particularly efficiently implemented, in which case a spacing of the freshly fitted grinding roller possibly does not have to be adapted by the adjusting device. The axis of rotation can be brought together with the joint axis in a particularly favored fashion.

In a further embodiment, the at least one grinding roller includes a rotatable roller body and at least one grinding element, wherein precisely two spacer devices are arranged on the roller body in the axial direction.

The possibility of lateral tilting of the grinding roller relative to the workpiece is obviated by two spacer devices.

According to an advantageous configuration of the invention, a joint axis, by way of which the roller body is or can be pivotably arranged on the spacer device is substantially congruent with an axis of rotation of the roller body.

In an advantageous configuration of the invention, the at least one grinding roller is in the form of a brush grinding roller and/or in the form of a grinding roller with abrasive grinding elements separate from a roller body. The spacer device is generally to be used at any grinding rollers.

It is advantageously provided that the grinding machine is configured so that an axis of rotation of the at least one grinding roller upon a pivotal movement of the at least one fixing device at which the at least one grinding machine is arranged relative to the at least one main body by the guide device is substantially congruent relative to a joint axis of the spacer device.

For example, in the case of an arrangement of axis of rotation, joint axis and/or pivot axis, which is substantially parallel and/or congruent, a spacing of the grinding roller relative to the workpiece upon pivotal movement of the grinding machine with fixing devices connected thereto can be kept constant whereby the pressing pressure of the grinding roller on the workpiece can also be kept constant. A change in spacing and/or pressure is possible in user-friendly fashion by way of the adjusting device in any pivotal position of the grinding machine.

It has proven to be advantageous if a transport device, preferably having two transport wheels, is arranged at the grinding machine.

The grinding machine can be maneuvered by the transport device prior to and/or after an abrasive machining operation, for example for storage.

According to an advantageous embodiment of the invention it is provided that the grinding machine includes a compressed air drive, a suction removal means and/or a fluid feed device.

The compressed air drive is particularly preferably provided in order to displace the at least one grinding roller in rotation relative to the workpiece. In general the compressed air drive is not provided for an advance movement relative to the workpiece. As an alternative to or supplemental to a manual push rod it is possible for example to provide a fully automatic or semi-automatic advance device for moving the at least one grinding roller along the workpiece.

A suction removal means reduces the generation of dirt adjoining the grinding roller. The fluid feed device can provide for an improvement in the grinding result.

It has proven to be advantageous if the workpiece is in the form of an airfoil or fuselage of an aircraft, parts of a ship, parts of a train or in the form of a rotor blade of a wind turbine. The spacer device is to be used in particularly favorable fashion in particular in relation to convex and/or concave workpieces.

BRIEF DESCRIPTION OF THE DRAWINGS

Further details and advantages of the present invention are set forth more fully hereinafter by means of the description of the drawings with reference to the embodiments by way of example illustrated in the drawings in which:

FIG. 1 shows a spacer device according to a particularly preferred embodiment for fixing to a grinding roller or grinding machine in three orthogonal views and a perspective view,

FIG. 2 is a perspective view from the front and a view from below of a main body of the spacer device according to the embodiment of FIG. 1,

FIGS. 3a-3c show an adjusting device, a rolling body and a fixing device of the spacer device according to the embodiment shown in FIG. 1, in each case as a perspective view,

FIGS. 4a-4c show a grinding roller in preferred embodiments without grinding elements, with separate grinding elements and in the form of a grinding brush for connection to a spacer device as shown in FIG. 1 or FIG. 6b,

FIG. 5 shows a grinding machine according to a particularly preferred embodiment with a grinding roller for connection to a spacer device as shown in FIG. 1 or FIG. 6b, and

FIGS. 6a and 6b show a spacer device according to a further particularly preferred embodiment in a double configuration connected to a grinding roller as a view from the front and a view from the side.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a spacer device 1 for a grinding roller 2 of a grinding machine 3 including a main body 4, to which two rolling bodies 5 are rotatably mounted. The spacer device can be supported on a surface 6 to be ground by way of the two rolling bodies 5 during a grinding process (see FIG. 6a).

Arranged centrally between the two rolling bodies 5 is a fixing device 7 with which the grinding roller 2 can be releasably fixed to the spacer device 1. There is provided an adjusting device 8, with which the grinding roller 2 is adjustable relative to the main body 4 and the two rolling bodies 5 in a state of being fixed to the spacer device 1. The fixing device 7 is pivotable with respect to the main body about a joint axis 9 that is identical to the pivot axis 11.

The main body 4 has two mutually spatially separate rolling body receiving means 12, between which the fixing device 7 is arranged. The number of rolling body receiving means 12 and rolling bodies 5 can generally be any desired number; according to the invention however there are at least two rolling bodies 5.

FIG. 2 shows the main body 4 of the spacer device 1. The adjusting device 8 is preferably formed by the main body 4 in combination with a separate adjustment apparatus 13. In general however the adjusting device 8 can also be formed in one piece by an adjustment apparatus 13 connected to the main body 4 in material-bonded relationship (see FIG. 6b), wherein a defined spacing of the grinding roller 2 can be generated by a suitable fixing means like a clamping connection and/or a screw connection in conjunction with the fixing device 7 or directly with the grinding roller 2.

The adjusting device 8 has two longitudinal grooves 17 which are arranged parallel to each other on the main body 4 and by way of which the grinding roller 2 in the state of being fixed to the spacer device 1 is adjustable relative to the main body 4 and the rolling bodies 5 by way of the adjustment apparatus 13. The number of longitudinal grooves 17 and the orientation thereof can generally be as desired.

The adjusting device 8 in this embodiment of the spacer device 1 includes the main body 4 and the adjustment apparatus 13 which can be releasably fixed to the main body 4 and is laterally displaceable, wherein the main body 4 has a receiving means 14 for region-wise arrangement of the adjustment apparatus 13 within the receiving means 14. The adjustment apparatus 13 is arranged completely in the receiving means 14 in the lateral direction of the spacer device 1, the adjustment apparatus 13 projecting upwardly beyond the main body 4 in the position of use.

The adjustment apparatus 13 is displaceable in the receiving means 14 in bilateral relationship freely for adjustment purposes.

Arranged on the main body 4 is a scale 15 with a marking to illustrate a spacing of the grinding roller 2 relative to the main body 4 and the rolling bodies 5. The scale 15 can be applied generally by glueing, painting, engraving, carving and so forth or can be in the form of raised portions or the like.

FIG. 3a shows the adjustment apparatus 13 of the adjusting device 8 with a fixing means 16 in the form of a screw connection for fixing a radial spacing of the main body 4 and the rolling bodies 5 from the grinding roller 2 in the state of the grinding roller 2 being fixed on the spacer device 1. The fixing means 16 can be of generally any kind and for example can also be in the form of a clamping connection to fix the radial spacing.

The fixing means 16 are introduced into at least one of the two openings, wherein the adjustment apparatus 13 can generally also alternatively (see FIG. 6b) or additionally have longitudinal grooves 17 for securing the radial spacing relative to the spacer device 1.

It can generally also be provided that alternatively or additionally to the scale 15 of the main body 4 a scale 15 is arranged on the adjustment apparatus 13 or the fixing device 7.

FIG. 3b shows a rolling body 5 in the form of a wheel. The rolling body 5 can be of generally any desired configuration. For example the arrangement may have barrel-shaped roller bodies (see FIG. 6b) and/or oblate ellipsoidal shapes as the rolling bodies 5 (those shown). The invention however is not restricted to the geometry of the rolling bodies.

FIG. 3c shows the fixing device 7 of the spacer device 1 for connection of the grinding roller 2, wherein the fixing device 7 is arranged by way of a fixing means 16 directly hingedly to the adjustment apparatus 13 and indirectly by way of the adjustment apparatus 13 to the main body 4. In general however the grinding roller 2 can also be directly connected to the adjustment apparatus 13 of the spacer device 1, in which case the fixing device 7 that is separate from the adjustment apparatus 13 can be omitted.

The fixing device 7 has three mutually spatially spaced mounting devices 20, to which the grinding roller 2 can be fixed in the axial direction.

FIG. 4a shows a rotatable rolling body 21 of a grinding roller 2, on which grinding elements 22 of the most widely varying kind can be arranged in grooves. The grooves are in the form of dovetail grooves and are provided inclinedly over an axial extent of the rolling body 21, but that is generally not compellingly required. The inclined positioning of the grooves affords an improvement in the grinding result and the dovetail grooves establish a firm fit for the grinding elements 22 on the rolling body 21.

FIG. 4b shows an embodiment of the grinding roller 2 in the form of a grinding roller 2 with abrasive grinding elements 22 which are separate from the rolling body 21 and which are arranged in grooves. The grinding elements 22 disposed in the grooves in the grinding roller include a carrier body and a flexible intermediate layer, on which grinding agent is applied.

FIG. 4c shows an embodiment of the grinding roller 2, the grinding roller 2 being in the form of a brush grinding roller 23. Brush bristles are connected releasably to the rolling body 21 at the periphery on the rolling body 21. In general however a brush grinding roller 23 can also be provided with non-detachable brush bristles.

FIG. 5 shows a grinding machine 3 with a grinding roller 2, wherein an arrangement comprising the grinding roller 2 with the spacer device 1 can be arranged axially on the grinding machine 3. The spacer device 1 can be mounted in the axial direction to the grinding roller 2.

The grinding machine 3 has a guide device 25 as a drive device 24 in the form of a push rod for manual driving of the grinding machine 3. As an alternative to or supplemental to the guide device 25 the drive device 24 can be in the form of a semi-automatic or fully automatic advance device—arranged for example on a housing of the grinding machine 3—. It is also conceivable not to involve a guide device 25 and only to provide for a forward movement of the grinding roller 2 by way of an automatic drive device 24. It is particularly preferably provided that there is no advance device and the grinding machine 3 is moved by way of the guide device 25.

The grinding machine 3 has a compressed air drive 28 to drive the grinding roller 2 in rotation. The compressed air drive 28 can be arranged for example by way of a compressed air connection on the spacer device 1 and/or the housing of the grinding machine 3.

The grinding machine 3 has a suction removal means 29 for the removal of dust or fluid during operation. The grinding machine 3 includes a fluid feed device 30 for applying grinding fluid to a surface 6 of a workpiece 32, that is to be processed, a coating 31 of the surface 6 and/or the grinding elements 22 of the grinding roller 2.

A relative spacing of the grinding roller 2 relative to the main body 4 or a rolling body 5 of the spacer device 1 can be adjusted by the adjusting device 8 of the spacer device or devices 1 to be fitted. Particularly preferably there are provided two axially and oppositely disposed spacer devices 1.

The grinding machine 3 is provided with a transport device 26, wherein two transport wheels 27 are arranged on the transport device 26 in order to manoeuvre the grinding machine 3 for example aside from operation with a constant spacing of the grinding roller 2 for the purposes of transporting the grinding machine 3.

In a state of being fixed to the spacer device 1 the grinding roller 2 is rotatable about a joint axis 9 of the spacer device 1 relative to the main body 4, the joint axis 9 being substantially congruent with the axis of rotation 10 of the grinding roller 2. A pivot axis 11 of the fixing device 7 is substantially congruent with the axis of rotation 10 of the grinding roller 2 in the position of use with respect to the adjusting device 8.

The grinding machine 3 is of such a configuration that an axis of rotation 10 of the grinding roller 2, in a pivotal movement of the fixing device 7 at which the grinding machine 3 is arranged, relative to the main body 4 of the spacer device 1—caused by a rotation of the guide device 25 about the axis of rotation 10 and a joint axis 9 of the spacer device 1—remains substantially congruent with respect to the joint axis 9 of the spacer device 1. The joint axis 9 is particularly preferably associated with the adjustment apparatus 13 or the fixing device 7 arranged thereon (pivot axis 11).

FIG. 6a shows a grinding roller 2, wherein arranged on the roller body 21 in the axial direction there are precisely two spacer devices 1 which differ in the geometrical configuration thereof from the spacer device 1 shown in FIG. 1. Alternatively two spacer devices 1 as shown in FIG. 1 can be arranged on the grinding roller 2.

In the state of being fixed to the spacer device 1 the grinding roller 2 is spaced axially from the adjusting device 8 by the fixing device 7. The main body 4 is arranged spaced from an axis of rotation 10 of the grinding roller 2 in the state of the grinding roller 2 of being fixed to the spacer device 1, in dependence on a setting of the adjusting device 8.

A joint axis 9 of the spacer device 1, by way of which the roller body 21 can be arranged pivotably on the spacer device 1, is substantially congruent with the axis of rotation 10 of the roller body 21.

The grinding machine 3 and the arrangement comprising grinding roller 2 and spacer device 1 can be used for processing a surface 6 of a workpiece 32, that is coated with a coating 31 to protect it from environmental influences, wherein at least one region of the workpiece 32, that adjoins the surface 6 to be processed, comprises a carbon fiber and/or glass fiber composite material. Use in relation to a wax-coated surface 6 of a negative form for production of the workpiece 32 which at least region-wise comprises a carbon fiber and/or glass fiber composite material is also possible. Use on a workpiece 32 without a coating is also possible.

The workpiece 32 is preferably in the form of an airfoil or fuselage of an aircraft, parts of a ship, parts of a train or as the rotor blade of a wind turbine.

FIG. 6b shows a view from the side of the main body 4 in material-bonded relationship with the adjusting device 8. The main body 4 has a curvature portion 19, on which a plurality of rolling bodies 5 are arranged. There can be generally any number of curvature portions 19. The curvature portion or portions 19 can be adapted to the geometry of the grinding roller 2.

The adjusting device 8 has two mutually parallel guide rails 18, by way of which the grinding roller 2 in the state of being fixed to the spacer device 1 is adjustable relative to the main body 4 and the rolling bodies 5 by way of a displacement of the fixing device relative to the main body 4. Fixing of the spacing can be effected by fixing means, for example by way of a connection to the fixing device 7.

The view shows an arrangement comprising the spacer device 1 and the grinding roller 2, with the grinding roller 2 being fixed to the spacer device 1 by way of the fixing device 7.

A radial spacing of the grinding roller 2 relative to the main body 4 and the rolling bodies 5 is adjustable by the adjusting device 8, by way of a lateral and relative movement of the grinding roller 2 with respect to the main body 4 or the rolling bodies 5.

Claims

1. A spacer device for a grinding roller, in particular of a grinding machine, including a main body to which at least two rolling bodies are rotatably mounted and wherein the spacer device can be supported by way of the at least two rolling bodies against a surface to be ground during a grinding process, wherein there is provided at least one fixing device which is arranged, preferably centrally, between the at least two rolling bodies and with which the grinding roller can be preferably releasably fixed to the spacer device and that there is provided at least one adjusting device with which the grinding roller in a state of being fixed to the spacer device is adjustable relative to the main body and/or at least one of the at least two rolling bodies.

2. The spacer device as set forth in claim 1, wherein the grinding roller in the state of being fixed to the spacer device is rotatable relative to the main body about a joint axis of the spacer device, wherein the joint axis is substantially congruent with an axis of rotation of the grinding roller.

3. The spacer device as set forth in claim 1, wherein the grinding roller in the state of being fixed to the spacer device is axially spaced from the adjusting device, wherein a pivot axis of the at least one fixing device with respect to the adjusting device is substantially congruent with an axis of rotation of the grinding roller.

4. The spacer device as set forth in claim 1, wherein the main body is arranged spaced radially from an axis of rotation of the grinding roller in the state of the grinding roller of being fixed to the spacer device.

5. The spacer device as set forth in claim 1, wherein the main body has at least two mutually spatially separate rolling body receiving means, between which the at least one fixing device is arranged.

6. The spacer device as set forth in claim 1, wherein the adjusting device includes the main body and an adjustment apparatus which can be releasably fixed to the main body and/or which is preferably laterally displaceable, wherein the main body has a receiving means for at least region-wise arrangement of the adjustment apparatus within the receiving means, wherein it is preferably provided that arranged on the main body and/or the adjustment apparatus is a scale for indicating a spacing of the grinding roller relative to the main body and/or at least one of the at least two rolling bodies.

7. The spacer device as set forth in claim 6, wherein the at least one fixing device is arranged, preferably by way of a fixing means, directly hingedly to the adjustment apparatus and/or indirectly by way of the adjustment apparatus to the main body.

8. The spacer device as set forth in claim 1, wherein the adjusting device, preferably the main body and/or an adjustment apparatus which is possibly present has at least one and preferably precisely two longitudinal grooves which are arranged parallel to each other and/or at least one guide rail, by way of which the grinding roller in the state of being fixed to the spacer device is adjustable relative to the main body and/or at least one of the at least two rolling bodies, preferably by way of the adjustment apparatus which is possibly provided.

9. The spacer device as set forth in claim 1, wherein the adjusting device has at least one fixing means, preferably a screw connection and/or clamping connection for fixing a radial spacing of the main body and/or at least one of the at least two rolling bodies from the grinding roller in the state of the grinding roller of being fixed to the spacer device.

10. The spacer device as set forth in claim 1, wherein the main body has at least one curvature portion and there are provided at least three rolling bodies, preferably at least five rolling bodies, wherein the at least three rolling bodies are arranged at the at least one curvature portion.

11. An arrangement comprising the spacer device as set forth in claim 1 and at least one grinding roller, wherein the at least one grinding roller is or can be fixed to the at least one spacer device by way of the at least one fixing device.

12. The arrangement as set forth in claim 11, wherein a radial spacing of the at least one grinding roller relative to the at least one main body and/or at least one of the at least two rolling bodies is adjustable by the at least one adjusting device, preferably by way of a lateral and relative movement of the at least one grinding roller with respect to the at least one main body and/or at least one of the at least two rolling bodies.

13. The arrangement as set forth in claim 11, wherein the at least one fixing device has at least two mutually spatially spaced mounting devices to which the at least one grinding roller is or can be axially fixed.

14. The arrangement as set forth in claim 11, wherein the at least one grinding roller includes a rotatable roller body and at least one grinding element, wherein precisely two spacer devices are arranged on the roller body in the axial direction.

15. The arrangement as set forth in claim 11, wherein a joint axis, by way of which the roller body is or can be pivotably arranged on the spacer device is substantially congruent with an axis of rotation of the roller body.

16. The arrangement as set forth in claim 11, wherein the at least one grinding roller is in the form of a brush grinding roller and/or in the form of a grinding roller with abrasive grinding elements separate from a roller body.

17. A grinding machine comprising the arrangement as set forth in claim 11 and a drive device and/or a guide device, wherein a radial spacing of the at least one grinding roller relative to the main body and/or at least one of the at least two rolling bodies is adjustable by the adjusting device of the at least one spacer device.

18. The grinding machine as set forth in claim 17, wherein the grinding machine is configured so that an axis of rotation of the at least one grinding roller upon a pivotal movement of the at least one fixing device at which the at least one grinding machine is arranged relative to the at least one main body by the guide device is substantially congruent relative to a joint axis of the spacer device.

19. The grinding machine as set forth in claim 17, wherein a transport device, preferably having two transport wheels, is arranged at the grinding machine.

20. The grinding machine as set forth in claim 17, wherein the grinding machine includes a compressed air drive, a suction removal means and/or a fluid feed device.

21. A method of use of the grinding machine as set forth in claim 17 for processing a surface of a workpiece, including applying a coating for protection from environmental influences, wherein at least one region of the workpiece that adjoins the surface to be processed comprises a carbon fiber and/or glass fiber composite material or a preferably wax-coated surface of a negative form for the production of a workpiece which preferably at least region-wise comprises a carbon fiber and/or glass fiber composite material.

22. The method of use as set forth in claim 21, wherein the workpiece is in the form of an airfoil or fuselage of an aircraft, parts of a ship, parts of a train or in the form of a rotor blade of a wind turbine.