Grinding machine

Abstract

The present invention comprises a grinding machine (1) for grinding a surface of a workpiece (6), wherein the grinding machine (1) has at least one abrasive holder (2), on which at least one abrasive (4) is arranged, and at least one drive device for moving the abrasive holder (2),
wherein the drive device has at least one drive shaft (12), on which an eccentric element (16) is arranged and which can be rotated about an axis of rotation (18), wherein the eccentric element (16) is arranged on the abrasive holder (2) at a distance from the axis of rotation (18), wherein it is possible to adjust the distance.

Claims

1. A grinding machine for grinding a surface of a workpiece, comprising: at least one abrasive holder on which at least one abrasive is arranged; and at least one drive device for moving the at least one abrasive holder, wherein the at least one drive device has at least one drive shaft on which at least one eccentric element is arranged and which can be rotated about an axis of rotation, wherein the at least one eccentric element is arranged on the at least one abrasive holder at a distance from the axis of rotation, wherein the distance from the axis of rotation is adjustable.

2. The grinding machine according to claim 1, wherein the at least one eccentric element is adjustable in length.

3. The grinding machine according to claim 1, wherein the at least one eccentric element is arranged in a releasable manner on the at least one drive shaft and is arrangeable at different positions on the at least one drive shaft.

4. The grinding machine according to claim 3, further comprising on the at least one eccentric element and on the at least one drive shaft mutually corresponding form-fitting elements which allow the at least one eccentric element to be arranged in a form-fitting manner on the at least one drive shaft.

5. The grinding machine according to claim 4, wherein the mutually corresponding form-fitting elements have a guide track in or on which one of the mutually corresponding form-fitting elements is arranged in a displaceable manner.

6. The grinding machine according to claim 5, wherein the one of the mutually corresponding form-fitting elements that is displaceable in or on the guide track is selectively clampable at different positions in or on the guide track.

7. The grinding machine according to claim 1 wherein the at least one drive device has at least two drive shafts, and wherein an eccentric element is arranged on each of the at least two drive shafts.

8. The grinding machine according to claim 1 further comprising at least one pressure-exerting element for subjecting at least part of the at least one abrasive to pressure, wherein the at least one pressure-exerting element is movable relative to the at least one abrasive.

9. The grinding machine according to claim 8, wherein the at least one pressure-exerting element has a surface which has a structure.

10. The grinding machine according to claim 9, wherein the surface of the at least one pressure-exerting element having the structure is directed toward the at least one abrasive.

Description

[0017] An exemplary embodiment of the present invention will be explained in more detail hereinbelow with the aid of the accompanying drawings, in which:

[0018] FIG. 1shows the schematic illustration of a grinding machine according to a first exemplary embodiment of the present invention, and

[0019] FIG. 2shows detail-form illustrations of a drive shaft and an eccentric element in different positions and views.

[0020] FIG. 1 shows the schematic illustration of a grinding machine 1 according to a first exemplary embodiment of the present invention. It has an abrasive holder 2, on which an abrasive 4 is arranged. A workpiece 6 is moved along the advancement direction V by a transporting device (not shown) and comes into contact with the abrasive 4. A motor 10, which is part of a drive device, is located on a machine frame 8, of which, for reasons of clarity, only part is shown.

[0021] In the exemplary embodiment shown, the grinding machine 1 has two drive shafts 12, which are driven by the motor 10 in each case via power-transmission elements 14. An eccentric element 16 is arranged on each of the drive shafts 12 and is connected, in turn, to the abrasive holder 2. If, then, the respective drive shaft 12 is made to rotate to rotate about its longitudinal axis, which also serves as the axis of rotation 18, via the motor 10, it is, of course, also the case that the eccentric element 16 rotates, in which case the abrasive holder 2 and thus also the abrasive 4 are made to oscillate.

[0022] In the exemplary embodiment shown, the grinding machine 1 has a pressure-exerting element 20, which in the exemplary embodiment shown can be moved along the double arrow 24 via a movement mechanism 22, which is likewise configured in the form of a motor, preferably in the form of an electric motor. A structure is preferably located on a surface 26 of the pressure-exerting element 20, said surface being directed toward the abrasive 4.

[0023] In the case of a grinding machine 1 according to the invention, it is possible to adjust a distance between a position 28, at which the eccentric element 16 comes into contact with the abrasive holder 2, and the axis of rotation 18.

[0024] FIG. 2 shows, schematically, different sectional illustrations, from different perspectives, of a transition region between the drive shaft 12 and the eccentric element 16. We will look first of all at the two illustrations on the left-hand side of FIG. 2. The bottom one of these two illustrations shows a schematic sectional illustration through the drive shaft 12 in a direction perpendicular to the axis of rotation 18. The drive shaft 12 is illustrated as the smaller of the two circles. The larger of the two circles forms the schematic plan view of part of the eccentric element 16. It is possible to see a guide track 30, which is designed in the form of a projecting rail. This is shown, for example, in the top right-hand-side illustration, which shows a section in a direction parallel to the axis of rotation 18. It is possible to see the T-shaped configuration of the guide track 30, which has two undercuts 32, in each of which engages the form-fitting element 34 in the drive shaft 12. Fastening elements 36, which may be designed, for example, in the form of screws, can be used to secure the form-fitting element 34 on the guide track 30 and thus the drive shaft 12 on the eccentric element 16. The top left-hand-side illustration in FIG. 2 shows the sectional illustration in a direction parallel to the axis of rotation 18, albeit offset through 90 in relation to the illustration at the top right. It is possible to see the two fastening elements 36, an undercut 32 and the form-fitting element 34, which engages in said undercut.

[0025] The two illustrations in the center correspond to the two illustrations on the left-hand side, the drive shaft 12 having been displaced relative to the eccentric element 16 along the guide track 30. This increases the distance between the position 28 and the axis of rotation 18, and there is also an increase in the overall movement which is caused by the drive shafts 12 rotating about the axes of rotation 18.

LIST OF REFERENCE SIGNS

[0026] V Advancement direction [0027] 1 Grinding machine [0028] 2 Abrasive holder [0029] 4 Abrasive [0030] 6 Workpiece [0031] 8 Machine frame [0032] 10 Motor [0033] 12 Drive shaft [0034] 14 Power-transmission element [0035] 16 Eccentric element [0036] 18 Axis of rotation [0037] 20 Pressure-exerting element [0038] 22 Movement mechanism [0039] 24 Double arrow [0040] 26 Surface [0041] 28 Position [0042] 30 Guide track [0043] 32 Undercut [0044] 34 Form-fitting element [0045] 36 Fastening element