Machine tool

Abstract

The invention relates to a machine tool (2) having a machine frame (4), having at least one working spindle (6) which is rotatably mounted about a spindle axis (8), having at least one workpiece table (10) which is associated with the at least one working spindle (6) and which is rotatably or rotatably mounted indirectly or directly in the machine frame (4) about an axis of rotation (12), the invention relates to a workpiece table (10) for machining a workpiece, comprising a support structure (14), a closed planar partition wall (16), which extends transversely to the axis of rotation (12) over the entire width of the workpiece table (10) and parallel to the axis of rotation (12) over the entire length of the workpiece table (10), and comprising at least one workpiece clamp (18), which is fixed in a rotationally fixed manner on the partition wall (16) and / or on the support structure (14), wherein the workpiece table (10) can be transferred by rotation about the axis of rotation (12) into a separating position, in which the separating wall (16) is arranged with its largest surface extending transversely to the associated spindle axis (8) and spatially separates a first region (20) of the workpiece table (10) facing the working spindle (6) from a second region (22) of the workpiece table (10) facing away from the working spindle (6), a workpiece clamp (18) arranged therein in the first region faces the working spindle (6).

Description

Technical Field

[0001] The present invention relates to a machine tool. Background Art

[0002] Machine tools in different embodiments and designs are known from the prior art. These machine tools can include, for example, a machine frame at which a workpiece table is arranged, and at the workpiece table, a workpiece can be releasably fixed at a workpiece clamping device. The workpiece can be machined by a working spindle of the machine tool.

[0003] In the case of known machine tools, the workpiece clamping device is torsionally fixed at the workpiece table. Here, in the case of loading or unloading the workpiece clamping device of the workpiece table, the working spindle is mostly spaced from the workpiece table by an unobstructed visual distance relative to the workpiece table. In order to reduce the risk of injury to the operator, especially in the case of loading or unloading the workpiece clamping device, the working spindle is spaced farthest from the workpiece table in the loading and unloading modes of the machine tool. Thereby, sufficient space can be provided to ensure sufficient working safety. Summary of the Invention

[0004] An object of an embodiment of the present invention is to propose a machine tool in which the distance between the rotational axis and the working spindle can be reduced.

[0005] This object is achieved by a machine tool having a machine frame, having at least one working spindle rotatably supported about a spindle axis, having at least one workpiece table associated with at least one working spindle, the workpiece table being rotatably or pivotably supported in the machine frame about a rotational axis, the workpiece table including a support structure, a closed planar partition wall (which extends transversely to the rotational axis over the entire width of the workpiece table and parallel to the rotational axis over the entire length of the workpiece table), and the workpiece table including at least one workpiece clamping device, the workpiece clamping device being torsionally fixed at the partition wall and / or at the support structure, wherein the workpiece table can be transferred to a separating position by rotation about the rotational axis, in which separating position the partition wall is arranged with its largest surface extending transversely to the associated spindle axis, and spatially separates a first region of the workpiece table facing the working spindle (in which the workpiece clamping device arranged therein faces the working spindle) from a second region of the workpiece table facing away from the working spindle.

[0006] By providing the workpiece table of the machine tool with a closed planar partition wall (which extends transversely to the rotational axis over the entire width of the workpiece table and parallel to the rotational axis over the entire length of the workpiece table), the workpiece clamping device can be loaded and unloaded in the separating position when the workpiece clamping device is arranged in the second region of the workpiece table. The partition wall is arranged between the operator and the working spindle in this case and protects the operator. Thereby, it becomes possible that the distance between the working spindle and the rotational axis of the workpiece table can be reduced and at the same time the requirements for working safety are ensured.

[0007] One or more workpieces can be fixed at the workpiece clamping location to facilitate machining thereof by at least one working spindle.

[0008] The following is possible for an embodiment of a machine tool, in which a planar partition wall is spaced apart from the axis of rotation without contact or in which the axis of rotation extends within the partition wall and / or in which at least one workpiece clamping is spaced apart from the axis of rotation without contact or the axis of rotation extends within at least one of the at least one workpiece clamping.

[0009] When the axis of rotation extends without contact not only relative to the planar partition wall but also relative to the workpiece clamping, rotation about the axis of rotation can be achieved without imbalance. In this case, the axis of rotation can extend through the common center of mass of the partition wall and the workpiece clamping.

[0010] This proves to be advantageous especially when only a single workpiece clamping is arranged at the workpiece table. In this case, the rotational range of the system formed by the partition wall and the workpiece clamping can be reduced.

[0011] When the workpiece table includes a plurality of workpiece clamps, for example, fixed on opposite sides of the partition wall, the following can prove to be advantageous if the axis of rotation extends within the partition wall. In this case, the rotational range can be kept minimal in such an arrangement.

[0012] To ensure that the arrangement of the partition wall at the workpiece table can ensure a higher approach to the workpiece to be machined by the working spindle, the following proves to be advantageous if the partition wall of the workpiece table includes at least one through-opening extending transversely to the axis of rotation, through which the partition wall can be penetrated by the working spindle, and the arrangement of the penetrated working spindle is accessible to the workpiece clamping in the loading area, and if the partition wall includes at least one planar closing device, which is arranged in or at at least one opening and which can be transferred from an open position to a closed position, in the open position the closing device at least completely or partially opens the opening in a direction transverse to the axis of rotation, and in the closed position the closing device at least completely closes the opening in a direction transverse to the axis of rotation.

[0013] By making the partition wall include a through-opening extending transversely to the axis of rotation, the working spindle can extend through the opening and machine the workpiece fixed at the workpiece clamping location, even if the working clamping location is in the second area of the workpiece table. Thereby, the accessibility and machinability of the workpiece arranged at the workpiece clamping location are improved.

[0014] By making the partition wall include at least one planar closing device which opens an opening for passage in the open position and closes the opening in the closed position, the working safety can be maintained in the loading or unloading mode of the machine tool by transferring the closing device to the closed position.

[0015] In this case it has proven particularly advantageous if the closing element is always arranged in the closed position in the separating position of the workpiece table.

[0016] Furthermore, the arrangement of at least one opening provided in the partition wall enables a compact construction of the workpiece table, since a smaller distance between the partition wall and the workpiece clamping can be selected without insurmountably impeding the accessibility of the workpiece clamping by the working spindle.

[0017] To stabilize the transfer of the closing device from the open position to the closed position and vice versa, it has proven advantageous if the partition wall includes at least one guiding device (such as a groove or flange) at at least one opening, through which the closing device can be guided from the open position to the closed position and back and is fixed against movement transverse to the transfer direction, and / or if the closing device is configured as a sliding door and includes at least one planar, in particular plate-shaped, door element or the closing device is configured as a rolling shutter and includes a plurality of sheet-like closing elements.

[0018] In principle it is possible that the partition wall includes a single opening, which extends, for example, centrally in the partition wall. To maintain the stability of the partition wall, it has proven advantageous if the partition wall includes a plurality of through openings extending transverse to the axis of rotation, which are spaced from one another by sections of the partition wall tabs, wherein each opening is associated with its own closing device, or wherein at least two openings, in particular all openings, of the partition wall are associated with a common closing device.

[0019] In this case it is possible, for example, that the partition wall includes two, four, six or eight openings, which are arranged in the partition wall mirror-symmetrically with respect to the axis of rotation.

[0020] In the case of an improvement of the last-mentioned embodiment form it has proven advantageous if the partition wall of the workpiece table includes at least one central tab section extending parallel to the axis of rotation, through which the axis of rotation extends, and / or includes at least two edge tab sections extending parallel to the axis of rotation, which form the outer edge of the partition wall, in particular wherein at least two, in particular at least four, openings are arranged between the central tab section and the edge tab section, which are associated with their own or a common closing device, respectively.

[0021] In principle, it is possible that the partition wall and the support structure are separate and separable components from each other. In the case of one embodiment of the machine tool, it can be arranged that the partition wall and the support structure form an integral common component and / or the central tab segment and / or at least two edge tab segments are constructed to bear loads and provide support.

[0022] If the partition wall and the support structure form an integral common component, the machine tool can be constructed with fewer components. In this case, at least one workpiece clamping is directly fixed to the partition wall. Here, the workpiece clamping can be fixed in direct contact with the partition wall at the partition wall or be fixed at a distance from the partition wall without contact relative to the partition wall by means of a spacer device.

[0023] If the partition wall and the support structure form an integral common component, it has been proven advantageous when the central tab segment and / or at least two edge tab segments are constructed to bear loads and provide support.

[0024] In this case, forces can be borne parallel to the axis of rotation and the forces can be transmitted indirectly or directly to the machine frame.

[0025] In principle, the orientation of the axis of rotation and the workpiece table can be realized arbitrarily. In the case of one embodiment of the machine tool, it is arranged that the axis of rotation of the workpiece table extends parallel to the horizontally extending X-axis or parallel to the vertically extending Y-axis, and / or the spindle axis of the working spindle extends parallel to the horizontally extending Z-axis, which Z-axis is transverse to the vertically extending Y-axis and transverse to the horizontally extending X-axis.

[0026] In principle, it is possible that there is a single workpiece clamping arranged in the workpiece table. Furthermore, in the case of one embodiment of the machine tool, it can be arranged that the workpiece table includes at least one first workpiece clamping and at least one second workpiece clamping, which are arranged torsion-resistant at the partition wall on opposite sides of the partition wall relative to each other and / or are arranged torsion-resistant at the support structure of the workpiece table.

[0027] If the workpiece table includes at least one first workpiece clamping and at least one second workpiece clamping, which are arranged torsion-resistant at the partition wall on opposite sides of the partition wall relative to each other and / or are arranged torsion-resistant at the support structure of the workpiece table, then the workpiece at the first workpiece clamping can be machined by the working spindle in parallel in the main time, while in the second area the second workpiece clamping can load or unload the workpiece. Thereby, the machining time of the machine tool can be reduced.

[0028] Furthermore, it is possible that a plurality of workpiece clamps are provided on one side with respect to the partition wall. Thus, for example, at least two first workpiece clamps can be arranged at the partition wall on one side with respect to the partition wall, and at least two second workpiece clamps are arranged on the opposite side surfaces. In this case, the two first workpiece clamps and the two second workpiece clamps can extend parallel to each other accordingly.

[0029] In order to ensure that in the transfer case where the workpiece table rotates around the rotation axis (by, for example, 180°), the workpiece clamps are always in the same position for machining by the working spindle, it has proven to be advantageous if the first workpiece clamps and the second workpiece clamps are arranged symmetrically, in particular point-symmetrically, with respect to the rotation axis and are torsionally fixed at the partition wall and / or the support structure of the workpiece table.

[0030] If the first workpiece clamps and the second workpiece clamps are arranged offset from each other without overlap in a direction transverse to the rotation axis when observed in a plane parallel to the partition surface of the partition wall, then a compact and so-called cross arrangement in the case where two workpiece clamps facing each other are provided can be ensured.

[0031] Thereby, the distance between the rotation axis and the working spindle can be further reduced.

[0032] The machine tool can be designed compactly, in which at least one workpiece table is rotatably or rotatably supported and fixed directly at the machine frame, and the workpiece table is transferred to a partition position at least in the loading and unloading modes that are parallel in the main time of the machine tool. In this partition position, the first region includes the working region of the workpiece table facing the working spindle, in which the workpiece clamps arranged therein face the working spindle, and in this partition position, the second region includes the loading region of the workpiece table facing away from the working spindle, in which the workpiece clamps arranged therein can be loaded and unloaded.

[0033] Thereby, the machine tool can be constructed very compactly. By rotatably or rotatably supporting and fixing the workpiece table directly at the machine frame, the distance between the working spindle and the rotation axis can be selected to be very small. Thereby, the machine tool can be constructed with reduced structural space.

[0034] In order to increase the number of workpieces that can be manufactured simultaneously, in the case of an improvement of the last-mentioned embodiment, the following can be provided, i.e., the machine tool includes at least two workpiece tables, which extend parallel to each other with respect to their rotational axes and are spaced apart from each other without contact transversely to the rotational axes. Thus, for example, in the case where the rotational axis extends horizontally, two workpiece tables can be arranged one above the other and aligned with each other with respect to the vertical Y-axis. In the separation position, in addition, the partition walls of at least two workpiece tables can continue seamlessly or without gaps with each other, and thereby completely or partially separate the working area from the loading area. When at least two workpiece tables are provided, in addition, it has been proven advantageous when the machine tool includes at least two working spindles. Here, each working spindle is associated with one workpiece table.

[0035] In addition, the following embodiment is possible, in which at least one workpiece table is indirectly fixedly supported rotatably or pivotably at the machine frame. Indirectly means the following, i.e., the workpiece table is not directly fixed at the machine frame, but another component is connected between the two.

[0036] In the case of one embodiment, the following is provided, i.e., at least one workpiece table is fixedly supported rotatably or pivotably at a rotary support, where the rotary support is fixedly supported rotatably or pivotably at the machine frame about a rotational axis and can be transferred from a first rotational position to a second rotational position. In the first rotational position, the workpiece table can be arranged in the working area facing the working spindle, and in the second rotational position, the workpiece table is arranged in the loading area, in which the workpiece clamping arranged therein can be loaded and unloaded.

[0037] Via the rotary support, at least one workpiece table is indirectly fixed at the machine frame.

[0038] The rotary support can be transferred, for example, by 180° from the first rotational position to the second rotational position and back. In order to reduce the stop time during loading and unloading, in the case of an improvement of the last-mentioned embodiment, the following is provided, i.e., the machine tool includes at least two workpiece tables, which are arranged on opposite sides of each other at the rotary support, where the first workpiece table is arranged in the working area in the first rotational position of the rotary support and the second workpiece table is arranged in the loading area in the first rotational position of the rotary support, and where the first workpiece table is arranged in the loading area in the second rotational position of the rotary support and the second workpiece table is arranged in the working area in the second rotational position of the rotary support.

[0039] When the first workpiece table is arranged in the working area, if the workpiece clamping arranged at the first workpiece table is in the first area of the first workpiece table, then the first workpiece table can be machined by the working spindle.

[0040] For loading or unloading the workpiece clamping of the second workpiece table, it has proven to be advantageous if, in this case, the workpiece clamping of the second workpiece table is located in the second region of the second workpiece table.

[0041] The rotary support can be configured in a frame shape. In this case, the spatial separation of the working area from the loading area can be ensured by the arrangement of the workpiece table in the separation position.

[0042] Furthermore, it is possible that the rotary support itself includes a rotary support partition wall, which is arranged transversely to the spindle axis of the working spindle in the rotary support separation position and separates the working area completely or at least partially from the loading area. Description of the Drawings

[0043] Further features, details and advantages of the present invention can be derived from the appended patent claims, from the drawings and from the subsequent description of three preferred embodiments of the machine tool.

[0044] Wherein:

[0045] Figure 1 A schematic side view showing a cross-section towards the first embodiment of the machine tool;

[0046] Figure 2 A schematic side view showing a cross-section towards the second embodiment of the machine tool;

[0047] Figure 3 A schematic side view showing a cross-section towards the third embodiment of the machine tool;

[0048] Figure 4 Shows a schematic perspective top view towards the embodiment according to Figure 3 with the workpiece clamping not present at the second

[0049] workpiece table. Detailed Description of the Invention

[0050] These drawings show embodiments of a machine tool designated as a whole with the reference numeral 2. The machine tool 2 includes a schematically shown frame 4 and a working spindle 6, which is rotatably supported about a spindle axis 8. Furthermore, the machine tool 2 includes at least one workpiece table 10 associated with at least one working spindle 6, which is directly fixed at the frame 4 in the embodiments shown in the drawings so as to be rotatable or pivotable about a rotation axis 12.

[0051] The workpiece table 10 includes a support structure 14 and an enclosed planar partition wall 16. The partition wall 16 extends across the entire width of the workpiece table 10 when viewed transversely to the rotation axis 12 and extends across the entire length of the workpiece table 10 when viewed parallel to the rotation axis 12.

[0052] Furthermore, the workpiece table 10 includes a workpiece clamping device 18 which is torsionally fixed at the partition wall 16 and / or at the support structure 14.

[0053] The workpiece table 10 can be transferred into a separating position by rotation about the axis of rotation 12, in which the partition wall 16 is arranged with its largest surface extending transversely to the spindle axis 8 of the associated working spindle. Arranged in such a way, the partition wall 16 spatially separates a first region 20 of the workpiece table 10 facing the working spindle 6 (in which the workpiece clamping device 18 arranged therein faces the working spindle 6) from a second region 22 of the workpiece table 10 facing away from the working spindle 6. For the three embodiments according to Figures 1 to 4 it is common that the axis of rotation 12 of the workpiece table 10 extends correspondingly parallel to the horizontally extending X-axis. The spindle axis 8 of the working spindle 6 extends parallel to the horizontally extending Z-axis, which extends transversely to the horizontally extending X-axis and transversely to the vertically extending Y-axis.

[0054] Furthermore, for Figures 1 to 4 all embodiments it is common that an opening 24 is arranged in the partition wall 16, which is constructed to penetrate transversely to the axis of rotation 12. The penetrating opening 24 serves for the working spindle 6 to pass through the partition wall 16 and for the workpiece arranged in the workpiece clamping device 18 arranged in the second region 22 of the workpiece table 10 to be machined through the opening 24.

[0055] Furthermore, the partition wall 16 correspondingly includes a planar closing device 26, which is arranged in or at the opening 24 and which can be transferred from an open position (in which the closing device 26 at least completely or partially opens the opening 24 in a direction transverse to the axis of rotation 12) into a closed position, in which the closing device 26 at least completely closes the opening 24 in a direction transverse to the axis of rotation 12. In the embodiment shown in the figures, the closing device 26 is correspondingly arranged in the closed position.

[0056] Figure 1 The first embodiment of the machine tool 2 is shown. In the case of this embodiment, a workpiece clamping device 18 is provided, which is rotatably or pivotably supported about the axis of rotation 12 via the support structure 14. The partition wall 16 is arranged opposite the workpiece clamping device 18. Both the partition wall 16 and the workpiece clamping device 18 are arranged to extend without contact relative to the axis of rotation 12.

[0057] Figure 2 The second embodiment of the machine tool 2 is shown, in the case of which two workpiece clamping devices 18 are arranged at the workpiece table 10. Here, the workpiece clamping devices 18 are arranged such that a first workpiece clamping device 28 is in Figure 2In the case of the embodiment shown, the first workpiece clamping 28 is arranged in the first region 20 while the second workpiece clamping 30 is arranged in the second region 22. The first workpiece clamping 28 and the second workpiece clamping 30 are spatially separated from each other by the partition wall 16. Furthermore, the first workpiece clamping 28 and the second workpiece clamping 30 are arranged offset from each other without overlap in a direction transverse to the axis of rotation 12 in a plane (viewed parallel to the separating surface of the partition wall 16). In addition, the first workpiece clamping 28 and the second workpiece clamping 30 are arranged point-symmetrically with respect to the axis of rotation 12. This enables an intersecting arrangement.

[0058] In the case of the embodiment according to Figure 2 one of the workpiece clamps 18 is arranged in the first region 20, which constitutes the working area. Here, the first workpiece clamping 28 is accessible to the working spindle 6. In this case, the second workpiece clamping 30 arranged in the second region 22 can be loaded or unloaded in the loading and unloading area.

[0059] Figure 3 A third embodiment of the machine tool 2 is shown. Similar to the embodiment according to Figure 2 the workpiece table 10 includes two workpiece clamps 18, namely one first workpiece clamping 28 and one second workpiece clamping 30 each. Additionally, in the case of the embodiment according to Figure 3 two workpiece tables 10 are provided, which extend parallel to each other with respect to their axis of rotation 12 and are spaced apart from each other without contact transverse to the axis of rotation 12. The two workpiece tables 10 are arranged one above the other and aligned with each other with respect to the vertical Y-axis. Here, each of the workpiece tables 10 includes a first workpiece clamping 28 and a second workpiece clamping 30. Each workpiece table 10 is associated with a working spindle 6, which is rotatably supported about its own spindle axis 8.

[0060] Figure 4 An isometric front view of the embodiment according to Figure 3 is shown, in which the first workpiece clamping 28 of the lower workpiece table 10 is obscured. Figure 4 For a more detailed illustration of the partition wall 16 and its structure. According to Figure 4 it is obvious that the partition wall 16 includes a central tab segment 32 and two edge tab segments 34 extending parallel thereto. Four openings 24 are arranged between the central tab segment 32 and one edge tab segment 34 each, which are spaced apart from each other by tabs accordingly. In the openings 24, sheet-like closing devices 26 are arranged and are in the closed position in the illustration according to Figure 4

[0061] ​The features of the invention disclosed in the above description, in the claims and in the drawings are important in the context of the different embodiments of the invention for its implementation, not only individually but also in any combination, within the scope of protection of the following claims.

[0062] List of reference numerals

[0063] 2 Machine tool

[0064] 4 Machine frame

[0065] 6 Working spindle

[0066] 8 Spindle axis

[0067] 10 Workpiece table

[0068] 12 Axis of rotation

[0069] 14 Support structure

[0070] 16 Partition wall

[0071] 18 Workpiece clamping

[0072] 20 First region

[0073] 22 Second region

[0074] 24 Opening

[0075] 26 Sealing device

[0076] 28 First workpiece clamping

[0077] 30 Second workpiece clamping

[0078] 32 Central tab segment

[0079] 34 Edge tab segment.

Claims

1. Machine tool (2), having a machine frame (4), having at least one working spindle (6) rotatably supported about a spindle axis (8), having at least one workpiece table (10) associated with the at least one working spindle (6), the workpiece table being rotatably or pivotably supported in the machine frame (4) about a rotational axis (12) indirectly or directly, the workpiece table including a support structure (14), a closed planar partition wall (16), the partition wall extending transversely to the rotational axis (12) over the entire width of the workpiece table (10) and parallel to the rotational axis (12) over the entire length of the workpiece table (10), and the workpiece table including at least one workpiece clamping device (18), the workpiece clamping device being torsionally fixed at the partition wall (16) and / or at the support structure (14), wherein, The workpiece table (10) can be transferred to a separating position by rotation about the rotation axis (12), in which the partition wall (16) is arranged with its largest surface extending transversely to the associated main spindle axis (8) and spatially separates a first region (20) of the workpiece table (10) facing the working spindle (6) from a second region (22) of the workpiece table (10) facing away from the working spindle (6), and a workpiece fixture (18) arranged in the first region faces the working spindle (6).

2. The machine tool (2) according to claim 1, characterized in that, The planar partition wall (16) is spaced apart from the rotation axis (12) without contact or the rotation axis (12) extends within the partition wall (16), and / or the at least one workpiece fixture (18) is spaced apart from the rotation axis (12) without contact or the rotation axis (12) extends within at least one of the at least one workpiece fixture (18).

3. The machine tool (2) according to claim 1 or 2, characterized in that, The partition wall (16) of the workpiece table (10) includes at least one through-opening (24) extending transversely to the rotation axis (12), through which the partition wall (16) can be penetrated by the working spindle (6) and the workpiece fixture (18) arranged in the loading region is accessible to the penetrated working spindle (6), and the partition wall (16) includes at least one planar closing device (26) which is arranged in or at at least one opening (24) and which can be transferred from an open position to a closed position, in which the closing device (26) at least completely or partially opens the opening (24) in a direction transverse to the rotation axis (12), and in the closed position the closing device (26) at least completely closes the opening (24) in a direction transverse to the rotation axis (12).

4. The machine tool (2) according to claim 3, characterized in that, The partition wall (16) includes at least one guiding device, such as a groove or a flange, in the region of the at least one opening (24), by means of which the transfer of the closing device (26) from the open position to the closed position and back can be guided and which is fixed against movement transverse to the transfer direction, and / or the closing device (26) is constructed in the form of a sliding door and includes at least one planar, in particular plate-shaped, door element or the closing device (26) is constructed in the form of a rolling shutter and includes a plurality of sheet-like closing elements.

5. The machine tool (2) according to any one of claims 3 or 4, characterized in that, The partition wall (16) includes a plurality of through-openings (24) extending transversely to the rotation axis (12), which are spaced apart from each other by tab segments of the partition wall (16), where each opening (24) is associated with its own closing device (26), or where at least two openings (24), in particular all openings (24), of the partition wall (16) are associated with a common closing device (26).

6. The machine tool (2) according to claim 5, characterized in that, The partition wall (16) of the workpiece table (10) includes at least one central tab segment (32) extending parallel to the rotation axis (12), through which the rotation axis (12) extends, and / or includes at least two edge tab segments (34) extending parallel to the rotation axis (12), which form the outer edge of the partition wall (16), in particular, wherein at least two, in particular at least four, openings (24) are arranged between the central tab segment (32) and the edge tab segment (34) accordingly, and each of them is associated with its own or a common closing device (26).

7. The machine tool (2) according to any one of the preceding claims, characterized in that, The partition wall (16) and the support structure (14) form an integral common member, and / or the central tab segment (32) and / or the at least two edge tab segments (34) are load-bearing and supportively constructed.

8. The machine tool (2) according to any one of the preceding claims, characterized in that, The rotation axis (12) of the workpiece table (10) extends parallel to the horizontally extending X-axis or parallel to the vertically extending Y-axis, and / or the spindle axis (8) of the work spindle (6) extends parallel to the horizontally extending Z-axis, which is transverse to the vertically extending Y-axis and transverse to the horizontally extending X-axis.

9. The machine tool (2) according to any one of the preceding claims, characterized in that, The workpiece table (10) includes at least one first workpiece clamping device (28) and at least one second workpiece clamping device (30), which are arranged torsionally resistant at the partition wall (16) on opposite sides of the partition wall (16) and / or at the support structure (14) of the workpiece table (10).

10. The machine tool (2) according to claim 9, characterized in that, The first workpiece clamping device (28) and the second workpiece clamping device (30) are arranged symmetrically, in particular point-symmetrically, with respect to the rotation axis (12) and are torsionally fixed at the partition wall (16) and / or the support structure (14) of the workpiece table (10).

11. The machine tool (2) according to claim 9 or 10, characterized in that, The first workpiece clamping device (28) and the second workpiece clamping device (30) are arranged offset from each other without overlap in a direction transverse to the rotation axis (12) when observed in a plane parallel to the separating surface of the partition wall (16).

12. The machine tool (2) according to any one of the preceding claims, characterized in that, The at least one workpiece table (10) is directly rotatably or pivotably supported and fixed at the machine frame (4), and the workpiece table (10) is transferred to a separating position at least in the loading and unloading mode parallel to the main time of the machine tool (2), in which the first region (20) includes the working region of the workpiece table (10) facing the work spindle (6), in which the workpiece clamping device (18) arranged therein faces the work spindle (6), and in which the second region (20) includes the loading region of the workpiece table (10) facing away from the work spindle (6), in which the workpiece clamping device (18) arranged therein can be loaded and unloaded.

13. The machine tool (2) according to claim 12, characterized in that At least two workpiece tables (10), which extend parallel to each other with respect to their rotation axes (12) and are spaced apart from each other without contact transverse to the rotation axes (12).

14. The machine tool (2) according to any one of claims 1 to 11, characterized in that, The at least one workpiece table (10) is fixedly supported rotatably or pivotably at a rotary support, wherein the rotary support is fixedly supported rotatably or pivotably about a rotary axis at the machine frame (4) and can be transferred from a first rotary position into a second rotary position, in the first rotary position the workpiece table (10) can be arranged in a working area facing the working spindle (6), and in the second rotary position the workpiece table (10) is arranged in a loading area in which a workpiece clamping (18) arranged therein can be loaded and unloaded.

15. The machine tool (2) according to claim 14, characterized in that At least two workpiece tables (10), which are arranged on opposite sides of one another at the rotary support, wherein a first workpiece table (10) is arranged in the working area in the first rotary position of the rotary support and a second workpiece table (10) is arranged in the loading area in the first rotary position of the rotary support, and wherein the first workpiece table (10) is arranged in the loading area in the second rotary position of the rotary support and the second workpiece table (10) is arranged in the working area in the second rotary position of the rotary support.

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