Machine tool

Abstract

The invention relates to a machine tool (2) having a machine frame, having at least one working spindle (4) rotatably mounted about a spindle axis (6), having at least one workpiece table (8) associated with the at least one working spindle (4), which workpiece table is rotatably or rotatably mounted in the machine frame about an axis of rotation (10), comprising a closed planar partition wall (12), the invention relates to a workpiece table (8) having a partition wall (12) which extends transversely to the axis of rotation (10) over the entire width of the workpiece table (8) and parallel to the axis of rotation (10) over the entire length of the workpiece table (8) and through which the axis of rotation (10) extends, and having at least one first workpiece clamp (14) and at least one second workpiece clamp (16), the workpiece tables (8) can be transferred into a separating position at least in a main time parallel loading and unloading mode of the machine tool (2), and the workpiece tables (8) can be transferred into the separating position at least in the main time parallel loading and unloading mode of the machine tool (2). In the separating position, the separating wall (12) is arranged so as to extend transversely to the associated spindle axis (6) and spatially separates the working region (18) from the loading region (20), in which working region the first or second workpiece holder (14, 16) is arranged in the separating position and the associated working spindle (4) is accessible. In the loading area, a second or first workpiece clamp (16, 14) is arranged in the separating position.

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 may include, for example, a machine frame at which a workpiece table is arranged, and a workpiece can be detachably fixed to the workpiece table. The workpiece can be machined by a working spindle of the machine tool.

[0003] In the case of known machine tools, the workpiece table is loaded with workpieces when the working spindle is stopped. In addition, when the workpiece is removed from the workpiece table after machining, the working spindle is stationary. This may result in a relatively high downtime of the machine tool.

[0004] Furthermore, machine tools are known in which a so-called rotary support is rotatably arranged at the machine frame, and two rotatable workpiece tables are arranged at the rotary support on opposite sides with respect to the rotation axis of the rotary support. By rotating the rotary support about the rotation axis, one workpiece table is accordingly transferred from the working area to the loading area and at the same time the workpiece table in the loading area is transferred to the working area. Thereby, the downtime can be reduced.

[0005] Although the use of the rotary support allows for the substantially time-parallel loading and unloading of the workpiece table, an increased distance of the working spindle relative to the rotation axis of the rotary support is required due to the rotation stroke of the rotary support in order to enable the collision-free rotation of the rotary support. Summary of the Invention

[0006] An object of an embodiment of the present invention is to propose a machine tool that can be loaded and unloaded substantially time-parallel and in which the distance between the rotation axis and the working spindle is reduced.

[0007] This object is achieved by a machine tool having a machine frame, at least one working spindle rotatably supported about a spindle axis, and 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 an enclosed planar partition wall that 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 through which the rotational axis extends, and the workpiece table including at least one first workpiece clamping device and at least one second workpiece clamping device, which are arranged torsionally resistant at the workpiece table on opposite sides of the partition wall, wherein the workpiece table is transferable into a separating position at least in a main-time parallel loading and unloading mode, in which the partition wall is arranged extending transversely to the associated spindle axis and spatially separates the working area from the loading area, in which the first or second workpiece clamping device is arranged in the separating position and the associated working spindle is accessible, and in which the second or first workpiece clamping device is arranged in the loading area in the separating position.

[0008] By having the workpiece table include a 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), a spatial separation between the working area and the loading area can be ensured in the separating position. This enables main-time parallel loading and unloading of the workpiece clamping devices arranged in the loading area. Main-time parallel loading and unloading means that, while the workpiece clamping device arranged in the working area is being machined by the working spindle, the workpiece clamping device can be loaded or unloaded. Thereby, the downtime of the machine tool can be reduced and the machining time can be improved.

[0009] The workpiece table can be positioned in any angular position about the rotational axis. Thus, the rotational axis is a full-value axis.

[0010] In principle, it is possible to provide only a single first workpiece clamping device and only a single second workpiece clamping device at the workpiece table. Additionally, embodiments are possible in which two first workpiece clamping devices and two second workpiece clamping devices or at least three first workpiece clamping devices and at least three second workpiece clamping devices are arranged at the workpiece table.

[0011] The partition wall can be configured as a tension bridge. In this case, the partition wall is constructed to withstand forces and loads.

[0012] At least one first workpiece clamping device and at least one second workpiece clamping device are each configured to receive and fix at least one workpiece.

[0013] In addition to the operation of the machine tool in a loading and unloading mode parallel in the main time, the machine tool can be operated in additional operating modes.

[0014] In the case of a refinement of the machine tool, it has proven to be advantageous if the workpiece table can be transferred in a working mode from a first machining rotation area (in which at least one of at least one first workpiece clamping can be positioned in at least one working position relative to the machine frame in the working area by rotation or turning of the workpiece table about the axis of rotation and can be fixedly positioned by torsion-resistant fixing of the workpiece table) into a second machining rotation area, in which at least one of at least one second workpiece clamping can be positioned in at least one working position relative to the machine frame in the working area by rotation or turning of the workpiece table about the axis of rotation and can be fixedly positioned by torsion-resistant fixing of the workpiece table.

[0015] By enabling the workpiece table to position the first workpiece clamping at the working area in a working mode for rotation or turning of the workpiece table about the axis of rotation into at least one working position relative to the machine frame, and by torsion-resistant fixing of the workpiece table, the first workpiece clamping can be positioned differently relative to the working spindle, whereby the workpiece arranged at the first workpiece clamping can be machined from different sides.

[0016] The same applies correspondingly to the second workpiece clamping in the second machining rotation area.

[0017] In the case of an embodiment of the machine tool, it is provided that the first workpiece clamping and the second workpiece clamping are arranged symmetrically, in particular point-symmetrically, with respect to the axis of rotation and are torsion-resistant fixed to the workpiece table in an aligned manner.

[0018] By arranging the first workpiece clamping and the second workpiece clamping symmetrically, in particular point-symmetrically, with respect to the axis of rotation and torsion-resistant fixing them to the workpiece table in an aligned manner, at least one workpiece at the respective workpiece clamping can be machined by the working spindle in the case of a 180° rotation or turning of the workpiece table, without the working spindle having to be moved over a long travel distance in its position. Thereby, the machining time can be further optimized.

[0019] In particular, when the first workpiece clamping and the second workpiece clamping are arranged point-symmetrically with respect to the axis of rotation and are torsion-resistant fixed to the workpiece table in an aligned manner, it has proven to be advantageous if the first workpiece clamping and the second workpiece clamping are arranged offset from each other without overlap in a direction transverse to the axis of rotation when observed in a plane parallel to the separating surface of the partition wall.

[0020] Thus, in the case of machining by means of a working spindle, an intersecting arrangement of a first workpiece clamping and a second workpiece clamping can be achieved, whereby the distance between the working spindle and the axis of rotation can be further reduced.

[0021] The following embodiments of the machine tool are possible, in which 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 in which the spindle axis of the working spindle extends parallel to the horizontally extending Z-axis, which Z-axis extends transversely to the vertically extending Y-axis and transversely to the horizontally extending X-axis.

[0022] If the axis of rotation of the workpiece table extends parallel to the horizontally extending X-axis, then the first workpiece clamping and the second workpiece clamping can likewise include their longest extension (i.e., their longitudinal direction, parallel to the horizontally extending X-axis).

[0023] If the axis of rotation of the workpiece table extends parallel to the vertically extending Y-axis, then at least one first workpiece table and at least one second workpiece table can include their longest extension (i.e., their longitudinal direction, likewise parallel to the Y-axis).

[0024] In order to facilitate the machining of the workpiece arranged at the workpiece clamping, it has proven 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 opening the working spindle can pass, and the workpiece clamping arranged in the loading area is accessible to the working spindle, and if the partition wall includes at least one planar closing device, which closing device 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 completely closes the opening at least in a direction transverse to the axis of rotation, wherein the closing element is arranged in the closed position during the loading and unloading modes that are parallel in the main time of the machine tool.

[0025] By having the partition wall of the workpiece table include at least one through-opening, the working spindle can pass through this opening from the working area into the loading area and machine the workpiece from one side, which side is arranged on the side facing away from the working spindle when the workpiece is arranged in the machining area. This makes it possible to machine the workpiece arranged in the workpiece clamping better from all sides.

[0026] This has proven to be particularly advantageous when the first workpiece clamping and the second workpiece clamping are arranged offset from one another without overlap in a direction transverse to the axis of rotation when viewed in the plane of the partitioned surface parallel to the partition wall. This ensures that when the working spindle approaches the workpiece clamping in the loading area through the opening in the partition wall, the workpiece clamping in the working area is arranged without collision with respect to the working spindle.

[0027] By making the partition wall simultaneously include a planar closing device (which is arranged in or at at least one opening and which completely closes the opening in the closed position at least in a direction transverse to the axis of rotation), it is ensured that, in the loading and unloading modes of the machine tool, the loading area is completely shielded from the working spindle by the partition wall.

[0028] In the case of an improvement of the last-mentioned embodiment form, it has proven to be advantageous if at least one opening includes at least one guiding device, such as a groove or a flange, through which the transfer and return of the closing device from the open position to the closed position can be guided and which is fixed against movement transverse to the transfer direction, and / or if the closing device is configured in the form of a sliding door and includes at least one planar, in particular plate-shaped, door element, or if the closing device is configured in the form of a rolling shutter door and includes a plurality of sheet-like closing elements.

[0029] By the provision of guiding devices, such as grooves or flanges, the closing device can be guided in its movement during the transfer from the open position to the closed position and back. Furthermore, in this case, the closing device is held in a direction transverse to the transfer direction by the guiding device.

[0030] When the closing device includes at least one planar, in particular plate-shaped, door element, the closing device can be easily installed.

[0031] When the closing device is configured in the form of a rolling shutter door and includes a plurality of sheet-like closing elements, the closing device can be stored compactly in the open position.

[0032] In this case, the closing device can be wound, in particular rolled, around a reel element arranged within the partition wall. Here, it is possible that the reel element includes a drive by means of which the reel element can be rotated about a rotational axis and in this case winds up or wraps the closing device. The closing device can be pre-tensioned into the closed position. In this case, the closing device has to be actively transferred against the pre-tension into the open position by the reel element. This embodiment form has the advantage that, in the case of a failure of the reel element or the drive for the reel element, the closing device is automatically transferred into the locked position, thereby always ensuring a high level of working safety for the machine tool operator.

[0033] In principle, it is possible that there is a single opening provided in the partition wall. Furthermore, it has proven to be advantageous if the partition wall includes a plurality of through openings extending transverse to the axis of rotation, which openings are spaced from one another by tab segments of the partition wall, where each opening is associated with its own closing device, or where at least two openings of the partition wall, in particular all openings, are associated with a common closing device.

[0034] The provision of multiple openings ensures the following, i.e., the partition wall can function as a tension bridge, whereby the partition wall can bear loads and forces.

[0035] When multiple openings are associated with a common closing device, the machine tool can be constructed with fewer components. When each opening is associated with its own closing device, these openings can be opened as needed for the working spindle to pass through.

[0036] To ensure that the partition wall can act as a tension bridge, it has proven advantageous if the partition wall of the workpiece table includes at least one central tab section of a load-bearing support extending parallel to the axis of rotation, through which the axis of rotation extends, and / or includes at least two edge tab sections of load-bearing supports extending parallel to the axis of rotation, which form the outer edge of the partition wall, in particular, where at least two, in particular at least four, openings are arranged between the central tab section and the edge tab sections, respectively, and these openings are associated with their own or a common closing device, respectively.

[0037] The provision of the central tab section and / or at least two edge tab sections extending parallel to the axis of rotation ensures the following, i.e., loads can be borne and further transmitted in a direction parallel to the axis of rotation.

[0038] To accelerate the machining of workpieces arranged at the workpiece table, an embodiment of the machine tool includes at least two working spindles associated with the same workpiece table, wherein the spindle axes of at least two working spindles associated with the same workpiece table extend parallel to each other, and they are arranged horizontally side by side with each other when the axis of rotation of the workpiece table extends parallel to the horizontally extending X-axis, or they are arranged vertically one above the other when the axis of rotation of the workpiece table extends parallel to the vertically extending Y-axis.

[0039] The provision of at least two working spindles associated with the same workpiece table ensures the following, i.e., the workpiece clamping arranged in the working area is machined by at least two working spindles. Thereby, the machining time can be reduced.

[0040] To further increase the number of workpieces that can be machined simultaneously by the machine tool, another embodiment of the machine tool includes at least two working spindles and at least two workpiece tables, wherein at least one first working spindle is associated with a first workpiece table that is rotatably or pivotably supported in the frame about a first axis of rotation, and wherein at least one second working spindle is associated with a second workpiece table that is rotatably or pivotably supported in the frame or in a rotating bracket about a second axis of rotation, which second axis of rotation extends parallel to the first axis of rotation and is spaced relative to the first axis of rotation.

[0041] Thus, the machine tool includes at least two workpiece tables, which extend parallel to each other.

[0042] These workpiece tables can be configured such that they are directly adjacent to each other and are aligned with each other in an overlapping manner in the case of the horizontal extension of the rotation axis, and are arranged side by side with each other in the case of the vertical extension of the rotation axis.

[0043] Furthermore, it has been proven advantageous that, in the loading and unloading modes of the machine tool, all workpiece tables are transferred to a separating position.

[0044] Furthermore, in the case of a further embodiment of the machine tool, in an improvement of the last-mentioned embodiment, at least one additional working spindle and at least one additional workpiece table are provided, wherein at least one additional working spindle is associated with at least one additional workpiece table, which is rotatably or pivotably supported in the machine frame about another rotation axis, which extends parallel to the first rotation axis and is spaced relative to the first and second rotation axes.

[0045] Thus, the machine tool can include at least three workpiece tables, which are arranged in an overlapping and aligned manner with each other in the case of the horizontal extension of the rotation axis and are arranged side by side in sequence in the case of the vertical extension.

[0046] In the case of the above-described embodiments, it is possible to correspondingly provide only one first working spindle, a second working spindle, and an additional working spindle. Furthermore, the following embodiments are possible, in which a plurality, in particular two, three, or four first working spindles, second working spindles, and additional working spindles are correspondingly provided, which are correspondingly associated with the first workpiece table, the second workpiece table, or an additional workpiece table.

[0047] The word "or" is understood in the traditional sense as meaning "and in other cases".

[0048] In the case where a plurality of workpiece tables are provided, it has been proven advantageous if the first workpiece table and the second workpiece table or the first workpiece table, the second workpiece table, and at least one additional workpiece table can be transferred to the separating position, to the first machining rotation area, and to the second machining rotation area in an independent operating mode, in particular decoupled kinematically, individually, and independently of each other, and / or can be transferred to the separating position, to the first machining rotation area, and to the second machining rotation area in a related operating mode, in particular coupled kinematically, jointly, and simultaneously.

[0049] The machine tool can be applied more flexibly when each workpiece table can be transferred to a separating position, to a first machining rotation area, and to a second machining rotation area separately and independently of each other in an independent operating mode. When all workpiece tables can be transferred to a separating position, to a first machining rotation area, and to a second machining rotation area jointly and simultaneously, the same workpiece can be machined simply.

[0050] Furthermore, it has proven to be advantageous if at least one first working spindle and at least one second working spindle or at least one first working spindle, at least one second working spindle, and at least one additional working spindle can operate and / or move separately and independently of each other kinematically decoupled, and / or can operate and / or move jointly and simultaneously kinematically coupled to each other.

[0051] Thereby, the independent operating mode and the associated operating mode can be implemented simply by kinematically decoupled or kinematically coupled working spindles.

[0052] To ensure collision-free machining, in one embodiment of the machine tool, the following is provided: at least one first working spindle and at least one second working spindle or at least one first working spindle, at least one second working spindle, and at least one additional working spindle are arranged vertically one above the other when the rotational axis of the workpiece table extends parallel to the horizontally extending X-axis, or are arranged horizontally side by side when the rotational axis of the workpiece table extends parallel to the vertically extending Y-axis. Description of the Drawings

[0053] Further features, details, and advantages of the present invention result from the appended patent claims, from the illustration of a preferred embodiment of the machine tool, and from the subsequent description.

[0054] Wherein:

[0055] Figure 1 : shows a schematic side view towards a machine tool according to the invention with two workpiece tables;

[0056] Figure 2 : shows a perspective side view towards the machine tool according to Figure 1 in which the workpiece clamping of the second workpiece table is not shown;

[0057] Figure 3 : shows a perspective side view of the illustration according to Figure 2 with the first workpiece table in a layout twisted with respect to the separating position. Detailed Description of the Invention

[0058] These figures show a machine tool, which is generally provided with the reference numeral 2. It includes a machine frame (not shown in the figures).

[0059] In the case of the embodiment shown in the figure, the machine tool 2 includes a plurality of working spindles 4, which are rotatably supported about spindle axes 6, respectively. In the case of the embodiment shown in the figure, the working spindles 4 are rotatably supported about spindle axes 6, which extend parallel to the horizontally extending Z-axis. Two working spindles 4 are arranged one above the other and aligned with each other with respect to the vertically extending Y-axis.

[0060] Furthermore, the embodiment of the machine tool 2 shown in Figures 1 to 3 includes two workpiece tables 8, which are rotatably and / or pivotably supported about a rotational axis 10 in the machine frame, respectively. The rotational axis 10 extends parallel to the horizontally extending X-axis.

[0061] Each workpiece table 8 includes an enclosed planar partition wall 12, which extends transversely to the rotational axis 10 over the entire width of the workpiece table 8 and parallel to the rotational axis 10 over the entire length of the workpiece table 8. The rotational axis 10 extends within the partition wall 12.

[0062] Furthermore, each workpiece table 8 includes a first workpiece clamping device 14 and a second workpiece clamping device 16. The first workpiece clamping device 14 and the second workpiece clamping device 16 are arranged torsionally resistant on the workpiece table 8 on opposite sides of the partition wall 12.

[0063] Figure 1 and Figure 2 shows the machine tool 2 in a main-time parallel loading and unloading mode. In this mode, the workpiece table 8 is transferred to a separating position, in which the respective partition wall 12 is arranged extending transversely to the associated spindle axis 6, and into a working area 18, in which the first workpiece clamping device 14 is arranged in the case of the embodiment shown in the figure in the separating position. Here, the second workpiece clamping device 16 is arranged in a loading area 20. Here, the partition wall 12 spatially separates the working area 18 from the loading area 20 in the separating position.

[0064] In the case of the embodiment shown in the figure, a first workpiece table 22 is arranged above a second workpiece table 24. Here, the working areas 18 of the two workpiece tables 22, 24 are not separated from each other and form a common working area 18. The same applies to the loading area 20.

[0065] As is evident from Figure 3 , in the working mode of the respective workpiece table 8 in a first machining rotation area, at least one of the at least one workpiece clamping device 14, 16 can be positioned in at least one working position relative to the machine frame by rotation or pivoting of the workpiece table 8 about the rotational axis 10 and can be fixedly positioned by torsionally resistant fixing of the workpiece table 8.

[0066] In the second machining rotation area, at least one of the at least one second workpiece clamping 16 therein can be positioned in at least one working position relative to the machine frame by the rotation or turning of the workpiece table 8 about the rotation axis 10 in the working area 18 and can be fixedly positioned by the torsion-resistant fixation of the workpiece table 8.

[0067] The first workpiece clamping 14 and the second workpiece clamping 16 are torsion-resistant fixedly attached to the workpiece table 8 point-symmetrically with respect to the rotation axis 10. Here, the first workpiece clamping 14 and the second workpiece clamping 16 are arranged offset from each other without overlap in a direction transverse to the rotation axis 10 when observed in a plane parallel to the separating surface of the partition wall 12.

[0068] This makes it possible for the respective working spindles 4 to pass through the through-opening 26 arranged in the partition wall 12 and extending transversely to the rotation axis 10 without collision. Here, the first working spindle 28 can pass through the opening 26 in the first workpiece table 22, while the second working spindle 30 can pass through the opening 26 in the second workpiece table 24. In the case of the embodiment shown in the figure, a closing device 32 is arranged in the opening 26, which is arranged in the closed position in the case of the embodiment shown in the figure. In the closed position, the opening 26 is completely closed in a direction transverse to the rotation axis 10 by the closing device 32. The closing device 32 can also be transferred to the open position, in which the opening 26 is completely or at least partially opened (not shown in the figure).

[0069] In the case of the embodiment shown in the figure, eight openings 26 are arranged in each workpiece table 8. Here, four of the eight openings 26 are respectively arranged between the central tab section 34 and the edge tab section 36.

[0070] Figure 1 A schematic side view of the machine tool 2 is shown. As follows by Figure 1 It is obvious that the first workpiece table 22 and the second workpiece table 24 are arranged overlapping and aligned with each other with respect to the vertically extending Y-axis. In addition, the first workpiece table 22 and the second workpiece table 24 are at least almost in contact with each other.

[0071] Figure 2 The machine tool 2 is shown in the form of an isometric side view according to Figure 1 . Here, the first workpiece clamping 14 of the second workpiece table 24 is not shown in order to make the unobstructed view towards the eight openings 26 and the closing device 32 arranged therein clear. In the case of the illustration according to Figure 1 and 2 , the two workpiece tables 8 are in the separated position, in which the partition wall 12 spatially separates the working area 18 from the loading area 20.

[0072] Figure 3 shows Figure 1 and 2 a machine tool 2, in which a first workpiece table 22 is twisted about a separating position.

[0073] The features of the invention disclosed in the foregoing description, in the claims and in the drawings are important not only individually but also in any combination in the implementation of the invention in its different embodiments within the scope of protection of the following claims.

[0074] List of reference signs

[0075] 2 Machine tool

[0076] 4 Working spindle

[0077] 6 Spindle axis

[0078] 8 Workpiece table

[0079] 10 Axis of rotation

[0080] 12 Partition wall

[0081] 14 First workpiece clamping

[0082] 16 Second workpiece clamping

[0083] 18 Working area

[0084] 20 Loading area

[0085] 22 First workpiece table

[0086] 24 Second workpiece table

[0087] 26 Opening

[0088] 28 First working spindle

[0089] 30 Second working spindle

[0090] 32 Sealing device

[0091] 34 Central tab segment

[0092] 36 Edge tab segment.

Claims

1. Machine tool (2), having a machine frame, having at least one working spindle (4) rotatably supported about a spindle axis (6), having at least one workpiece table (8) associated with the at least one working spindle (4), the workpiece table being rotatably or pivotably supported in the machine frame about a rotational axis (10), the workpiece table comprising a closed planar partition wall (12), the partition wall extending transversely to the rotational axis (10) over the entire width of the workpiece table (8) and parallel to the rotational axis (10) over the entire length of the workpiece table (8), and the rotational axis (10) extending through the partition wall, and the workpiece table comprising at least one first workpiece clamping device (14) and at least one second workpiece clamping device (16), the workpiece clamping devices being arranged torsionally resistant at the workpiece table (8) on opposite sides of the partition wall (12) relative to one another, wherein, The workpiece table (8) can be transferred into a separating position at least in a loading and unloading mode that runs in parallel with the main time of the machine tool (2), in which the partition wall (12) is arranged transversely to the associated spindle axis (6) and spatially separates the working area (18) from the loading area (20), in which the first or second workpiece clamping device (14, 16) is arranged in the working area in the separating position and the associated working spindle (4) is accessible, and in which the second or the first workpiece clamping device (16, 14) is arranged in the loading area in the separating position.

2. The machine tool (2) according to claim 1, characterized in that, The workpiece table (8) can be transferred from a first machining rotation area into a second machining rotation area in the working mode, in which at least one of the at least one first workpiece clamping devices (14) in the first machining rotation area can be positioned in at least one working position relative to the machine frame in the working area (18) by rotation or turning of the workpiece table (8) about the rotation axis (10), and can be fixed in a position-fixed manner by torsion-resistant fixing of the workpiece table (8), and in which at least one of the at least one second workpiece clamping devices (16) in the second machining rotation area can be positioned in at least one working position relative to the machine frame in the working area (18) by rotation or turning of the workpiece table (8) about the rotation axis (10), and can be fixed in a position-fixed manner by torsion-resistant fixing of the workpiece table (8).

3. The machine tool (2) according to claim 1 or 2, characterized in that, The first workpiece clamping device (14) and the second workpiece clamping device (16) are arranged symmetrically to each other, in particular point-symmetrically, with respect to the rotation axis (10) and are torsion-resistant fixed to the workpiece table (8) in an aligned manner.

4. The machine tool (2) according to any one of the preceding claims, characterized in that, The first workpiece clamping device (14) and the second workpiece clamping device (16) are arranged offset from each other without overlap in a direction transverse to the rotation axis (10) when observed in a plane parallel to the separating surface of the partition wall (12).

5. The machine tool (2) according to any one of the preceding claims, characterized in that, The rotation axis (10) of the workpiece table (8) extends parallel to the horizontally extending X-axis or parallel to the vertically extending Y-axis, and / or the spindle axis (6) of the working spindle (4) extends parallel to the horizontally extending Z-axis, the Z-axis being transverse to the vertically extending Y-axis and transverse to the horizontally extending X-axis.

6. The machine tool (2) according to any one of the preceding claims, characterized in that, The partition wall (12) of the workpiece table (8) includes at least one through-opening (26) extending transversely to the rotation axis (10). The work spindle (4) can pass through the partition wall (12) through the opening, and the workpiece clamping devices (14, 16) arranged in the loading area (20) are accessible to the work spindle (4). The partition wall (12) includes at least one planar closing device (32) which is arranged in or at the at least one opening (26) and which can be transferred from an open position to a closed position. In the open position, the closing device (32) at least completely or partially opens the opening (26) in a direction transversely to the rotation axis (10). In the closed position, the closing device (32) at least completely closes the opening (26) in a direction transversely to the rotation axis (10), wherein the closing element is arranged in the closed position in a loading and unloading mode parallel to the main time of the machine tool (2).

7. The machine tool (2) according to claim 6, characterized in that, The at least one opening (26) includes at least one guiding device, such as a groove or a flange, through which the transfer of the closing device (32) from the open position to the closed position and back can be guided and which is fixed against movement transversely to the transfer direction, and / or the closing device (32) is configured in the form of a sliding door and includes at least one planar, in particular plate-shaped, door element, or the closing device (32) is configured in the form of a rolling shutter and includes a plurality of sheet-like closing elements.

8. The machine tool (2) according to any one of claims 6 or 7, characterized in that, The partition wall (12) includes a plurality of through-openings (26) extending transversely to the rotation axis (10), which are spaced from each other by tab segments (34) of the partition wall (12) accordingly. Each opening (26) is associated with its own closing device (32), or at least two openings (26) of the partition wall (12), in particular all openings (26), are associated with a common closing device (32).

9. The machine tool (2) according to claim 8, characterized in that, The partition wall (12) of the workpiece table (8) includes at least one central tab segment (34) of a load-bearing support extending parallel to the rotation axis (10), through which the rotation axis (10) extends, and / or includes at least two edge tab segments (36) of load-bearing supports extending parallel to the rotation axis (10), which form the outer edge of the partition wall (12). In particular, at least two, in particular at least four, openings (26) are arranged between the central tab segment (34) and the edge tab segments (36) accordingly, and the openings are associated with their own or a common closing device (32) accordingly.

10. The machine tool (2) according to any one of the preceding claims, characterized in that At least two working spindles (4) associated with the same workpiece table (8), wherein the spindle axes (6) of at least two working spindles (4) associated with the same workpiece table (8) extend parallel to each other, and they are arranged horizontally side by side with each other when the rotational axis (10) of the workpiece table (8) extends parallel to the horizontally extending X-axis, or they are arranged vertically one above the other with each other when the rotational axis (10) of the workpiece table (8) extends parallel to the vertically extending Y-axis.

11. The machine tool (2) according to any one of the preceding claims, characterized in that At least two working spindles (4) and at least two workpiece tables (8), wherein at least one first working spindle (28) is associated with a first workpiece table (22) and is rotatably or pivotably supported about a first rotational axis in the machine frame, and wherein at least one second working spindle (30) is associated with a second workpiece table (24) and is rotatably or pivotably supported about a second rotational axis in the machine frame or in the rotary support, the second rotational axis extending parallel to the first rotational axis and being spaced relative to the first rotational axis.

12. The machine tool (2) according to claim 11, characterized in that At least one additional working spindle (4) and at least one additional workpiece table (8), wherein the at least one additional working spindle (4) is associated with the at least one additional workpiece table (8) and is rotatably or pivotably supported about another rotational axis (10) in the machine frame, the another rotational axis extending parallel to the first rotational axis and being spaced relative to the first and second rotational axes.

13. The machine tool (2) according to claim 11 or 12, characterized in that, The first workpiece table (22) and the second workpiece table (24) or the first workpiece table (22), the second workpiece table (24) and the at least one additional workpiece table (8) can be transferred into the separation position, into the first machining rotary area and into the second machining rotary area in an independent operating mode, in particular kinematically decoupled, individually and independently of each other, and / or can be transferred into the separation position, into the first machining rotary area and into the second machining rotary area in a related operating mode, in particular kinematically coupled, jointly and simultaneously.

14. The machine tool (2) according to any one of claims 11 to 13, characterized in that, The at least one first working spindle (28) and the at least one second working spindle (30) or the at least one first working spindle (28), the at least one second working spindle (30) and the at least one additional working spindle (4) can operate and / or move kinematically decoupled, individually and independently of each other, and / or can operate and / or move kinematically coupled, jointly and simultaneously.

15. The machine tool (2) according to any one of claims 11 to 14, characterized in that, The at least one first working spindle (28) and the at least one second working spindle (30) or the at least one first working spindle (28), the at least one second working spindle (30) and the at least one additional working spindle (4) are arranged vertically one above the other with each other when the rotational axis (10) of the workpiece table (8) extends parallel to the horizontally extending X-axis, or are arranged horizontally side by side with each other when the rotational axis (10) of the workpiece table (8) extends parallel to the vertically extending Y-axis.

Images