Finishing device for finishing an annular workpiece and finishing system

Abstract

The invention relates to a finishing device (10) for finishing a ring-shaped workpiece, comprising a finishing tool (12) and an oscillation drive (16) for driving the finishing tool along an oscillation axis (18), a rotary drive for driving the workpiece about a rotation axis (52), and a support device for supporting the workpiece on a horizontal support plane (88). The support device has at least one support unit (22, 24, 26) with a roller carrier (38, 40, 42) on which a support roller rotatable about a support roller axis is arranged for supporting an underside of the workpiece, and on which a support roller rotatable about a contact roller axis is arranged for contacting a circumferential surface of the workpiece. The roller carrier (38, 40, 42) of the support unit (22, 24, 26) is mounted on a frame and is aligned along a roller carrier adjustment axis (44, 46, 48). It is movable.The invention further relates to a finishing system.

Description

[0001] The invention relates to a finishing device for finishing a ring-shaped workpiece, comprising a finishing tool and an oscillation drive for driving the finishing tool along an oscillation axis, a rotation drive for driving the workpiece around a rotation axis, and a support device for supporting the workpiece on a horizontal support plane.

[0002] From DE 10 2010 036 445 A1, a finishing device is known in which a support surface is defined by two V-shaped rows of balls and by a reference ball. Furthermore, the finishing device has pressure rollers mounted on slides. This finishing device enables the finishing of ring-shaped workpieces of different sizes.

[0003] The present invention is based on the objective of proposing a finishing device with a simplified design.

[0004] This problem is solved in a finishing device of the type mentioned at the outset according to the invention in that the support device has at least one support unit with a roller carrier on which a support roller rotatable about a support roller axis is arranged for supporting a bottom side of the workpiece and on which a support roller rotatable about a contact roller axis is arranged for contact against a circumferential surface of the workpiece, wherein the roller carrier of the support unit is mounted on a frame and is displaceable along a roller carrier adjustment axis.

[0005] The finishing device according to the invention comprises at least one support unit with a roller carrier mounted on a frame and displaceable along a roller carrier adjustment axis. The roller carrier has a support roller which is rotatable about a support roller axis and serves to support the underside of an annular workpiece. A contact roller is also arranged on the roller carrier, which is rotatable about a contact roller axis and serves to bear against a circumferential surface of the workpiece. This circumferential surface can optionally be a radially outward-facing or a radially inward-facing circumferential surface of the workpiece.

[0006] The arrangement of both a support roller and a contact roller on a common roller carrier, along with the roller carrier's adjustability relative to a frame along a roller carrier adjustment axis, enables the provision of a simple and compact support unit. This is particularly advantageous for bearing rings for large slewing bearings, which have comparatively large diameters, but where the end faces of the bearing ring (one of which forms the underside of the workpiece) and the circumferential surfaces adjacent to the end faces are arranged close together. Thus, the roller carrier can be designed to be relatively compact, and its support roller and contact roller can be positioned adjacent to each other.

[0007] The support roller axis and the contact roller axis are oriented at an angle to each other. In particular, the support roller axis is oriented horizontally and the contact roller axis is oriented vertically.

[0008] The roller carrier is mounted on the frame so that it can slide along a roller carrier adjustment axis. Depending on the guide length provided by the frame, it is possible to adjust the support device to accommodate workpieces of different sizes.

[0009] Preferably, the roller carrier adjustment axis is oriented parallel to the support plane. In this way, the height position of the support roller can be maintained independently of the position of the roller carrier along the roller carrier adjustment axis.

[0010] It is further preferred that the support roller axis is radially oriented with respect to the rotation axis of the workpiece. This allows the support roller to roll on the underside of the workpiece without transverse forces.

[0011] It is further preferred if the axis of the support roller is oriented perpendicular to the support plane. This allows the support roller to roll freely on a circumferential surface of the workpiece without transverse forces.

[0012] It is possible that the support roller has a cylindrical or convex contact profile and / or that the contact roller has a cylindrical or convex contact profile. Cylindrical profiles allow contact with the workpiece along a contact line; convex profiles allow contact with the workpiece at a contact point and therefore result in a comparatively higher contact force, but offer the advantage of a very precise definition of the contact plane and correspondingly precise positioning of the workpiece.

[0013] It is possible for the support roller axis and the contact roller axis to be fixed relative to each other. However, it is preferred that the contact roller is mounted on a contact roller holder that is displaceable along a contact roller adjustment axis. This allows for particularly easy adjustment of a support unit for positioning the contact roller either on a radially outward-facing circumferential surface of the workpiece or on a radially inward-facing circumferential surface of the workpiece.

[0014] A simple and compact design is also achieved if the adjustment axis of the rollers is oriented parallel to the support roller axis.

[0015] A further simplified adjustment of the position of the roller bearing is achieved if the roller bearing can be driven along the roller adjustment axis by a roller bearing drive. The roller bearing drive is preferably also arranged on the roller carrier.

[0016] It is conceivable that a rotary drive for rotating the workpiece around its axis of rotation is provided separately. However, it is preferred that the support roller can be driven around its axis by a support roller drive and / or that the contact roller can be driven around its axis by a contact roller drive.

[0017] For easy setup of the finishing device and adaptation to changed workpiece diameters, it is preferred if the roller carrier can be driven along the roller carrier adjustment axis with a roller carrier drive.

[0018] It is particularly preferred if the support device comprises three support units arranged offset from one another. The three support rollers of the three support units define the position and orientation of the support plane.

[0019] When using three support units, it is preferred that a first support unit has a first roller carrier adjustment axis, a second support unit has a second roller carrier adjustment axis, a third support unit has a third roller carrier adjustment axis, and that only one of the three roller carrier adjustment axes is radially oriented with respect to the workpiece's axis of rotation. This allows the radially oriented roller carrier adjustment axis to be used as the feed axis for advancing the associated support roller.

[0020] For a particularly compact design, it is further preferred that imaginary extensions of the two other roller carrier adjustment axes intersect in a region offset from the workpiece's axis of rotation. This region offset from the workpiece's axis of rotation can also lie outside a circumferential surface of the workpiece, for example, in a working area of ​​the finishing tool where an effective surface of the finishing tool rests against the workpiece.

[0021] The invention further relates to a finishing system comprising a finishing device as discussed above and a ring-shaped workpiece to be finished or finished.

[0022] The workpiece is preferably a bearing ring for a large slewing bearing. Large slewing bearings of this type are used particularly in wind turbines.

[0023] Further features and advantages of the invention are the subject of the following description of a preferred embodiment.

[0024] The drawing shows: Fig. 1 a top view of an embodiment of a finishing device with a finishing tool, an oscillation drive and with three support units, each comprising a frame and a roller carrier; Fig. 2 a top view of the finishing tool, the oscillation drive, the roller carriers of the finishing device according to Fig. 1 and a schematically represented, ring-shaped workpiece; Fig. 3 a top view of one of the roller carriers in isolation; Fig. 4 a front view of the roller carrier according to Fig. 3; Fig. 5 a side view of a support unit with a roller carrier; Fig. 6 a schematic sectional view of an annular workpiece, the underside of which rests on a support roller of one of the roller carriers and the radially outward-facing circumferential surface of which rests against a contact roller of the roller carrier; and Fig. 7 one of the Fig. 6 corresponding representation, wherein the workpiece rests against the contact roller of the roller carrier with a circumferential surface pointing radially inwards.

[0025] One embodiment of a finishing device is designated in the drawing by reference numeral 10. The finishing device 10 comprises a finishing tool 12, for example in the form of a finishing stone. The finishing tool 12 is held on a holder 14 and can be driven in an oscillating manner along an oscillation axis 18 by means of an oscillation drive 16. During the finishing process of a workpiece, an effective surface 20 of the finishing tool 12 rests against a rotating workpiece surface to be finished, with the effective surface 20 being moved back and forth parallel to the oscillation axis 18. In this way, a cross-cut pattern characteristic of the finishing process is produced.

[0026] The finishing device 10 further comprises three support units 22, 24, 26, each of which is placed on a base surface 28 (compare Figure 5 ) are set up.

[0027] The support units 22, 24, 26 each have a frame 30 for placement on the mounting surface 28. A guide plate 32 is arranged on the upper side of the frame 30, which serves to arrange at least one longitudinal guide 34, 36.

[0028] The longitudinal guides 34, 36 serve to guide respective roller carriers 38, 40, 42. Thus, a first roller carrier 38 of the first support unit 22 is displaceable along a first roller carrier adjustment axis 44, a second roller carrier 40 of the second support unit 24 is displaceable along a second roller carrier adjustment axis 46, and a third roller carrier 42 of the third support unit 26 is displaceable along a third roller carrier adjustment axis 48.

[0029] The three roller supports 38, 40, 42 are arranged offset from one another, such that they support offset areas of a workpiece 50 to be finished (compare Fig. 2 ).

[0030] The workpiece 50 is assigned a central axis of rotation 52, which corresponds to a central axis of the workpiece 50. The workpiece 50 has a radially outward-facing circumferential surface 54 and a radially inward-facing circumferential surface 56, compare Figures 6 and 7 The workpiece 50 also has a bottom surface 58 facing downwards with respect to the direction of gravity, which is supported during the finishing machining of one of the circumferential surfaces 54, 56 of the workpiece 50 by the roller carrier components 38, 40, 42 described below. The workpiece 50 also has a top surface 60 facing away from the bottom surface 58.

[0031] Workpiece 50 is in the Figure 2 schematically and transparently shown in order to illustrate the relative position of the circumferential surfaces 54 and 56 to the components of the roller carriers 38, 40, 42 described below.

[0032] The following describes the construction of the roller carriers 38, 40, 42 with reference to the Figures 3 to 5 described. The roller carriers 38, 40, 42 each have a base plate 62, which is guided on at least one guide 34, 36 of a respective guide plate 32.

[0033] A support roller bearing 64 is arranged on the base plate 62, which serves to support a support roller 66 that is rotatable about a support roller axis 68. Furthermore, a support roller drive 70 is provided for driving the support roller 66 about the support roller axis 68.

[0034] The support roller 66 is also in Figures 6 and 7 The support roller 66 can have a cylindrical support profile 72 or a convex support profile 72.

[0035] The base plate 62 also serves to accommodate a roller bearing 74, by means of which a roller bearing 76 is rotatably mounted about a roller bearing axis 78. A roller bearing drive 80 is provided for driving the roller bearing 76 about the roller bearing axis 78.

[0036] The roller bearing 74 is displaceable along a roller adjustment axis 82. Optionally, a roller bearing drive 84 is provided, which serves to drive the roller bearing 74 along the roller adjustment axis 82.

[0037] The roller bearing 74 has connecting webs 86 which extend parallel to the roller axis 78. The connecting webs 86 are arranged on opposite sides of the roller adjustment axis 82, so that the roller 76 is free-standing along the roller adjustment axis 82. This has the advantage that the roller 76 can be selectively brought into contact with either the radially outward-facing circumferential surface 54 of the workpiece 50 or with the radially inward-facing circumferential surface 56 of the workpiece 50 (compare Figures 6 and 7 ).

[0038] The three support units 22, 24, 26 together form a support device for defining a horizontal support plane 88, compare Figure 1 and 4 .

[0039] If the support roller 66 has a cylindrical support profile 72, such a support roller 66 supports the underside 58 of the workpiece 50 along a support line 90, see for example the support roller 66 of the first roller carrier 38 in Figure 2 If the support profile 72 is convex, a support roller 66 supports the underside 68 of the workpiece 50 at only one support point 92, see for example the support roller 66 of the second roller carrier 40 in Figure 2 . Corresponding mounting lines or points also result with a cylindrical mounting profile 94 or a convex mounting profile 94 of the mounting rollers 76, compare Figures 6 and 7 .

[0040] For the finishing of a workpiece 50, its underside 58 rests on the three support rollers 66 of the three roller carriers 38, 40, 42. The three contact rollers 76 of the three roller carriers 38, 40, 42 bear against one of the circumferential surfaces 54 or 56 of the workpiece 50. A rotary drive for rotating the workpiece 50 about the axis of rotation 52 is provided by the at least one support roller drive 70 and / or by the at least one contact roller drive 80.

[0041] It is possible that the finishing tool 12 has a comparatively small working area 96 and that the adjustment of the finishing device 10 to workpieces 50 with different diameters is carried out exclusively or at least substantially by adjusting the position of the roller carriers 38, 40, 42 along the respective roller carrier adjustment axes 44, 46, 48.

[0042] It is preferred that only one of the roller carrier adjustment axes runs radially in the direction of rotation 52 of the workpiece 50, see for example the illustration of the third support unit 26 with roller carrier 42 in the Figure 1 The imaginary extensions of the roller carrier adjustment axes 46 and 48 of the first two support units 22 and 24 intersect in an area offset from the rotation axis 52 of the workpiece 50. For example, these imaginary extensions intersect in the working area 96 of the finishing tool 12.

[0043] To position a workpiece 50 relative to the support rollers 66 and the contact rollers 76, the roller carrier 38 of the first support unit 22 and the roller carrier 40 of the second support unit 24 can be pre-positioned. The workpiece 50 can then be pre-positioned, and the roller carrier 42 of the third support unit 26 can then be moved radially along the roller carrier adjustment axis 48 towards the rotation axis 52 of the workpiece 50 until the contact roller 78 of the third roller carrier 42 comes into contact with one of the circumferential surfaces 54, 56 of the workpiece 50. Finally, the same roller carrier 42 is moved slightly further in the same direction to generate a clamping force that secures the workpiece 50 between the three contact rollers 78.

[0044] For example, a roller carrier drive 98 is provided for the delivery of the third roller carrier 42 along the third roller carrier adjustment axis 48, which is located in Figure 1 is shown schematically. It is understood that such a roller carrier drive 98 can also be arranged on the first support unit 22 and / or on the second support unit 24 in order to drive the first roller carrier 38 and / or the second roller carrier 40 along the respective roller carrier adjustment axes 44, 46.

Claims

1. Finishing device (10) for finishing a ring-shaped workpiece (50), comprising a finishing tool (12) and an oscillation drive (16) for driving the finishing tool (12) along an oscillation axis (18), a rotation drive for driving the workpiece (50) about a rotation axis (52), and a support device for supporting the workpiece (50) on a horizontal support plane (88). characterized by the fact thatThe support device has at least one support unit (22, 24, 26) with a roller carrier (38, 40, 42) on which a support roller (66) rotatable about a support roller axis (68) is arranged for supporting a bottom surface (58) of the workpiece (50) and on which a contact roller (76) rotatable about a contact roller axis (78) is arranged for contacting a circumferential surface (54, 56) of the workpiece (50), wherein the roller carrier (38, 40, 42) of the support unit (22, 24, 26) is mounted on a frame (30) and is displaceable along a roller carrier adjustment axis (44, 46, 48).

2. Finishing device (10) according to claim 1, characterized by the fact that the roller carrier adjustment axis (44, 46, 48) is oriented parallel to the support plane (88).

3. Finishing device (10) according to any one of the preceding claims, characterized by the fact that the support roller axis (68) is radially oriented with respect to the rotation axis (52) of the workpiece (50).

4. Finishing device (10) according to one of the preceding claims, characterized by the fact that the system roller axis (78) is oriented vertically with respect to the support plane (88).

5. Finishing device (10) according to any one of the preceding claims, characterized by the fact that the support roller (66) has a cylindrical or convex support profile (72) and / or the contact roller (76) has a cylindrical or convex contact profile (94).

6. Finishing device (10) according to one of the preceding claims, characterized by the fact that the support roller (76) is mounted on a support roller bearing (74) which is displaceable along a support roller adjustment axis (82).

7. Finishing device (10) according to claim 6, characterized by the fact that the positioning roller adjustment axis (82) is oriented parallel to the support roller axis (68).

8. Finishing device (10) according to claim 6 or 7, characterized by the fact thatthe roller bearing (74) can be driven by a roller bearing drive (84) along the roller adjustment axis (82).

9. Finishing device (10) according to one of the preceding claims, characterized by the fact that to provide the rotation drive, the support roller (66) can be driven around the support roller axis (68) by a support roller drive (70) and / or the contact roller (76) can be driven around the contact roller axis (78) by a contact roller drive (80).

10. Finishing device (10) according to one of the preceding claims, characterized by the fact that the roller carrier (38, 40, 42) can be driven by a roller carrier drive along the roller carrier adjustment axis (44, 46, 48).

11. Finishing device (10) according to one of the preceding claims, characterized by the fact that The support device comprises three support units (22, 24, 26) arranged offset from each other.

12. Finishing device (10) according to claim 11, characterized by the fact thata first support unit (22) has a first roller carrier adjustment axis (44), that a second support unit (24) has a second roller carrier adjustment axis (46), that a third support unit (26) has a third roller carrier adjustment axis (48), and that only one roller carrier adjustment axis (48) of the three roller carrier adjustment axes (44, 46, 48) is radially oriented with respect to the rotation axis (52) of the workpiece (50).

13. Finishing device (10) according to claim 12, characterized by the fact that imagined extensions of the two other roller carrier adjustment axes (44, 46) intersect in an area offset to the rotation axis (52) of the workpiece (50).

14. Finishing system comprising a finishing device (10) according to one of the preceding claims and an annular workpiece (50) to be finished or finished.

15. Finishing system according to claim 14, characterized by the fact that the workpiece (50) is a bearing ring for large rolling bearings.

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