Machine tool and method for operating the machine tool

Abstract

The invention relates to a machine tool (1) comprising: - a machine frame (3); - at least one working spindle (4) which is mounted so as to be rotatable about a spindle axis (5); - a workpiece clamping device (10), the workpiece clamping device (10) comprising a workpiece table (11) which is designed to receive at least one workpiece (2), a first pivot bearing (13) and a second pivot bearing (14) being formed, by means of which the workpiece table (11) is mounted so as to be pivotable about a workpiece table pivot axis (12), the workpiece table (11) comprising a crossmember (16) which is arranged parallel to the workpiece table pivot axis (12), the workpiece table (11) comprising a first limb (17) by means of which the crossmember (16) is coupled to the first pivot bearing (13), and the workpiece table (11) comprising a second limb (18) by means of which the crossmember (16) is coupled to the second pivot bearing (14); - a machine controller (21). A workpiece distance (22) of the workpiece (2) from the workpiece table pivot axis (12) is adjustable.

Description

[0001] MACHINE TOOL, AND A METHOD FOR OPERATING THE MACHINE TOOL

[0002] The invention relates to a machine tool and a method for operating the machine tool.

[0003] EP2522457A1 discloses a machine tool with a machine frame and a first work spindle, which is rotatably mounted about a first spindle axis, and a workpiece clamping device designed to hold at least one first workpiece. The workpiece clamping device comprises a first workpiece table.

[0004] The machine tool known from EP2522457A1 has the disadvantage that its flexibility for machining the workpieces is insufficient.

[0005] The object of the present invention was to overcome the disadvantages of the prior art and to provide an improved machine tool.

[0006] This problem is solved by a device and a method according to the claims.

[0007] According to the invention, a machine tool is designed. The machine tool comprises:

[0008] - a machine frame;

[0009] - at least one working spindle which is rotatably mounted about a spindle axis;

[0010] - a workpiece clamping device, wherein the workpiece clamping device comprises a workpiece table designed to receive at least one workpiece, wherein a first pivot bearing and a second pivot bearing are provided, by means of which the workpiece table is pivotably mounted about a workpiece table pivot axis, wherein the workpiece table comprises a crossbeam arranged parallel to the workpiece table pivot axis, wherein the workpiece table comprises a first leg by means of which the crossbeam is coupled to the first pivot bearing and wherein the workpiece table comprises a second leg by means of which the crossbeam is coupled to the second pivot bearing;

[0011] - a machine control system.

[0012] The workpiece is mounted on the workpiece table so that it can be moved relative to the workpiece table swivel axis. An advantage of the machine tool according to the invention is that the ability to adjust the workpiece relative to the workpiece table swivel axis improves the flexibility for machining the workpieces. For example, it is conceivable that the workpiece distance can be adjusted during machining to achieve improved adjustability in addition to the mobility of the working spindle. In particular, this allows for the machining of workpieces that are large relative to the external dimensions of the machine tool, since the individual strokes of the adjustment axes can be increased by this measure.Furthermore, this measure allows for the machining of large workpieces relative to the external dimensions of the machine tool, since the additional displacement capability of the workpiece can prevent any collisions of the workpiece with components of the machine tool that limit the machining area.

[0013] Furthermore, the workpiece distance from the workpiece table swivel axis can be adjusted. An advantage of this design is that the flexibility for machining workpieces can be improved by allowing adjustment of the workpiece distance from the workpiece table swivel axis. For example, it is conceivable that the workpiece distance can be adjusted during machining to achieve improved adjustability in addition to the mobility of the working spindle. This measure also allows the center of gravity of the workpiece table, including the workpiece mounted on it, to be adjusted relative to the workpiece table swivel axis. Thus, the moment of inertia of the workpiece table and the workpiece mounted on it can be changed.

[0014] In one embodiment, the workpiece can be mounted on the workpiece table in a way that allows it to be displaced radially relative to the workpiece table pivot axis. This allows the distance between the workpiece and the workpiece table pivot axis to be adjusted.

[0015] In another embodiment, the workpiece can be mounted on the workpiece table so that it can be moved tangentially relative to the workpiece table's pivot axis. This allows for displacement perpendicular to the workpiece table's pivot axis. Furthermore, the workpiece, along with the workpiece table's crossbeam, can be moved relative to the workpiece table's pivot axis. This offers the advantage of simple workpiece positioning on the workpiece table's crossbeam.

[0016] Furthermore, it may be provided that the workpiece is moved relative to the workpiece table's crossbeam relative to the workpiece table's swivel axis. In this case, a workpiece clamping device may be provided, which is arranged on the workpiece table's crossbeam and is slidable relative to the crossbeam by means of a guide.

[0017] Furthermore, it can be advantageous if the distance between the crossbeam and the workpiece table swivel axis is adjustable. This offers the benefit of easily adjusting the workpiece distance. Additionally, this measure allows for varying the workpiece table's turning radius. For example, it is conceivable that when the workpiece table rotates around its swivel axis by more than 80°, the distance between the crossbeam and the swivel axis is adjusted.

[0018] Furthermore, the first and second legs of the workpiece table can be designed to be length-adjustable. Particularly with legs designed in this way, the crossbeam can be easily adjusted relative to the workpiece table swivel axis.

[0019] Furthermore, the first and second legs of the workpiece table can be designed to be telescopic. Particularly in the harsh environment of machining, a telescopic design of the first and second legs of the workpiece table located in the machining area is easy to implement and also offers appropriate protection against contamination during length adjustment.

[0020] Another advantageous design allows the first leg of the workpiece table to be slidably mounted on the first pivot bearing, and the second leg to be slidably mounted on the second pivot bearing. This allows the crossbeam to be shifted relative to the workpiece table's pivot axis. This measure can be implemented as an alternative or in addition to the length adjustment of the legs. In a first embodiment, the first leg of the workpiece table can be slidably mounted on the first pivot bearing along its longitudinal extent, and the second leg can be slidably mounted on the second pivot bearing along its longitudinal extent. This allows the workpiece to be shifted radially relative to the workpiece table's pivot axis.

[0021] In a first embodiment, the first leg of the workpiece table can be slidably mounted on the first pivot bearing transversely to its longitudinal extent, and the second leg of the workpiece table can be slidably mounted on the second pivot bearing transversely to its longitudinal extent. The workpiece can thus be moved tangentially to the workpiece table pivot axis.

[0022] According to further training, it is possible for a first drive unit to be configured for adjusting the first leg and a second drive unit to adjust the second leg. This offers the advantage that each leg can be adjusted individually and independently. This allows for precise alignment of the workpiece with the workpiece table swivel axis.

[0023] Preferably, the first drive unit and the second drive unit are moved synchronously to each other, so that the traverse is moved parallel to the workpiece table swivel axis.

[0024] In an alternative design, the first and second drive units can be moved asynchronously or assume different positions to create a specific clamping force within the workpiece table and thus compensate for any load-induced deformation of the workpiece table. The first and second drive units can be used to adjust the length of the first and second legs, respectively. Furthermore, the first and second drive units can also be used to displace the first and second legs relative to the first and second pivot bearings, respectively. If both the length and displacement of the legs are adjustable, two first drive units or two second drive units can be used.Furthermore, it can be advantageous if the first drive unit is coupled to a first spindle drive for adjusting the first leg, and the second drive unit is coupled to a second spindle drive for adjusting the second leg. The corresponding distances can be set precisely, especially using a spindle drive. Each spindle drive can have a spindle nut and an adjusting spindle. A ball screw can be used, or alternatively, a trapezoidal spindle.

[0025] In an alternative design variant, a central drive unit can be provided for adjusting both the first and second legs. This has the advantage that only one drive unit is required to adjust both legs.

[0026] In a first embodiment, the central drive unit can be arranged in the crossbeam of the workpiece table. In an alternative embodiment, the central drive unit can be located on one of the two legs of the workpiece table. The first leg and / or the second leg can then be adjusted via connecting shafts extending from the central drive unit.

[0027] The first leg and the second leg can each be adjusted by means of a spindle drive, which can be coupled to the central drive unit.

[0028] Furthermore, it can be advantageous to have a rotary table mounted on the workpiece table, which is pivotable about a rotary table swivel axis. The distance between the rotary table and the traverse is adjustable, and a rotary table adjustment motor is provided for this purpose. This offers the advantage that the workpiece distance to the workpiece swivel axis can be easily adjusted. The adjustability of the rotary table relative to the traverse can be implemented as an alternative or additional measure to the adjustability of the distance between the traverse and the workpiece table swivel axis.

[0029] Furthermore, the workpiece can be mounted on the workpiece table in a way that allows it to be moved parallel to the workpiece table swivel axis. This offers the advantage that the workpiece's position along the X-axis of the machine tool can be changed. For example, large workpieces can be rotated if they can also be moved during rotation to avoid collisions with machine tool components.

[0030] Furthermore, it can be provided that a rotary table is arranged on the workpiece table, which is pivotably mounted on the workpiece table about a rotary table pivot axis, wherein the rotary table is designed to be displaceable along the workpiece table pivot axis relative to the workpiece table. This measure can further improve the flexibility of the machine tool.

[0031] Furthermore, it can be provided that another rotary table is arranged on the workpiece table, which is pivotably mounted on the workpiece table about a further rotary table pivot axis, wherein the second rotary table is designed to be displaceable along the workpiece table pivot axis relative to the workpiece table. In particular, it can be provided that the rotary table and the second rotary table are adjustable in their distance from each other. This has the advantage that this measure further increases the flexibility of the machine tool. For example, workpieces of different sizes can be clamped on the rotary table and the second rotary table, whereby the two rotary tables can be positioned on the traverse in such a way that the differently sized workpieces do not collide with each other or with the workpiece table when rotating about the rotary table pivot axes, and can be as large as possible.This requires flexible positioning of the two rotary tables on the workpiece table.

[0032] Furthermore, it is also conceivable that when one of the workpieces clamped on one of the rotary tables is rotated, the distance between the two rotary tables is changed, so that, for example, a workpiece extending beyond the turning circle of the rotary table can be swivelled by 180°.

[0033] Furthermore, the first leg can be coupled to the traverse by means of a first pivot joint, and the second leg can be coupled to the traverse by means of a second pivot joint, with the traverse being tiltable relative to the workpiece table pivot axis. This offers the advantage of providing additional mobility or tiltability of the workpiece, thus increasing the flexibility of the machine tool. This measure can be particularly advantageous if the first drive unit for adjusting the first leg and the second drive unit for adjusting the second leg can be adjusted independently of each other.

[0034] Furthermore, it can be provided that the workpiece is mounted on the workpiece table's crossbeam by means of a linear guide, allowing it to be moved relative to the crossbeam. This measure enables easy movement of the workpiece relative to the workpiece table's crossbeam.

[0035] Furthermore, it may be provided that a second linear guide is formed on the traverse of the workpiece table, which is arranged at an angle of 90° to the linear guide, wherein the workpiece is mounted on the traverse of the workpiece table in a manner that allows it to be moved relative to it by means of a linear guide and the second linear guide.

[0036] According to the invention, a method for operating a machine tool is provided, comprising a machine frame, a work spindle rotatably mounted about a spindle axis, and a workpiece clamping device. The workpiece clamping device includes a workpiece table designed to receive at least one workpiece. A first pivot bearing and a second pivot bearing are provided, by means of which the workpiece table is pivotably mounted about a workpiece table pivot axis. The workpiece table includes a crossbeam arranged parallel to the workpiece table pivot axis. The workpiece table comprises a first leg by means of which the crossbeam is coupled to the first pivot bearing, and a second leg by means of which the crossbeam is coupled to the second pivot bearing. The method comprises the following steps:

[0037] - Machining the first workpiece using the first working spindle.

[0038] Furthermore, the workpiece distance to the workpiece table swivel axis is adjusted.

[0039] An advantage of the method according to the invention lies in the fact that the flexibility for machining workpieces can be improved by being able to adjust the workpiece distance from the workpiece table swivel axis. For example, it is conceivable that the workpiece distance can be adjusted during machining on the machine tool to achieve improved adjustability in addition to the mobility of the working spindle. According to a further embodiment, it is possible to adjust the workpiece distance from the workpiece table swivel axis when the workpiece table is swiveled by an angle greater than 80° about the workpiece table swivel axis. This has the advantage that the working area of ​​the machine tool can be kept as small as possible.

[0040] For example, the workpiece can be machined with an initial workpiece distance set relative to the workpiece table swivel axis. The workpiece table can then be swiveled 180° around the workpiece table swivel axis. Before this operation, the workpiece distance relative to the workpiece table swivel axis can be reduced, for example, to reduce the cutting circle.

[0041] Furthermore, it can be provided that when the workpiece is pivoted about a rotary table pivot axis, the workpiece is moved parallel to the workpiece table pivot axis.

[0042] Furthermore, the moment of inertia can be reduced by adjusting the workpiece distance to the workpiece table swivel axis.

[0043] To better understand the invention, it is explained in more detail with reference to the following figures.

[0044] They each show, in a highly simplified, schematic representation:

[0045] Fig. 1 shows a first embodiment of a machine tool with a workpiece table;

[0046] Fig. 2 shows a first embodiment of the workpiece table with two legs and a crossbeam, wherein the legs are individually adjustable relative to the pivot bearing of the workpiece table;

[0047] Fig. 3 shows a second embodiment of the workpiece table with two legs and a crossbeam, wherein the legs are jointly adjustable relative to the pivot bearing of the workpiece table;

[0048] Fig. 4 shows a third embodiment of the workpiece table with two legs and a crossbeam, wherein the legs are individually adjustable relative to the pivot bearing of the workpiece table; Fig. 5 shows a fourth embodiment of the workpiece table with two legs and a crossbeam, wherein the crossbeam is adjustable relative to the legs;

[0049] Fig. 6 shows a fifth embodiment of the workpiece table with two legs and a crossbeam, wherein the legs are telescopic;

[0050] Fig. 7 shows a sixth embodiment of the workpiece table with two legs and a crossbeam, wherein an adjustable rotary table is arranged on the crossbeam;

[0051] Fig. 8 shows a seventh embodiment of the workpiece table with two legs and a crossbeam, wherein the crossbeam is coupled to the legs by means of a pivot joint;

[0052] Fig. 9 shows an eighth embodiment of the workpiece table with two rotary tables arranged on it;

[0053] Fig. 10 shows a ninth embodiment of the workpiece table with a workpiece that can be moved relative to the traverse by means of a linear guide;

[0054] Fig. 11 shows a tenth embodiment of the workpiece table with a workpiece that can be moved relative to the traverse by means of a linear guide and a second linear guide.

[0055] It should be noted at the outset that in the differently described embodiments, identical parts are provided with the same reference numerals or component designations, and the disclosures contained in the entire description can be applied analogously to identical parts with the same reference numerals or component designations. Furthermore, the positional designations chosen in the description, such as top, bottom, side, etc., refer to the figure directly described and illustrated, and these positional designations must be applied analogously to the new position if the position changes.

[0056] Fig. 1 shows a perspective view of a schematic representation of a first embodiment of a machine tool 1 for machining workpieces 2. The machine tool 1 has a machine frame 3, which serves as a base for the components mounted on it. For the sake of clarity, the machine frame 3 is shown only schematically in Fig. 1. However, it should be noted that the machine frame 3 can be anchored at the installation site. Furthermore, the machine frame 3 naturally serves to accommodate all the components of the machine tool 1.

[0057] Furthermore, it may be provided that the machine tool 1 includes a working spindle 4. The working spindle 4 may be rotatably mounted about a spindle axis 5.

[0058] Furthermore, it can be provided that the work spindle 4 is adjustable along a Z-axis 6 and an X-axis 7 relative to the machine frame 3. It can also be provided that the first work spindle 4 is adjustable along a Y-axis 8 arranged at right angles to the Z-axis 6 and X-axis 7 relative to the machine frame 3.

[0059] In this first embodiment, the Z-axis 6 can be arranged horizontally. The Z-axis 6 can be arranged parallel to the first spindle axis 5. Furthermore, the X-axis 7 can also be arranged horizontally. The X-axis 7 can be arranged at a right angle to the Z-axis 6. The Y-axis 8 can also be arranged vertically.

[0060] Furthermore, it may be provided that the working spindle 4 serves to hold a machining tool 9, by means of which the workpiece 2 can be machined.

[0061] As can be seen particularly well from Fig. 1, it may also be provided that a workpiece clamping device 10 is designed, which serves to hold the first workpiece 2.

[0062] The workpiece clamping device 10 can have a workpiece table 11. The workpiece table 11 can be pivotably mounted on the machine frame 3 about a workpiece table swivel axis 12. In particular, the workpiece table swivel axis 12 can be horizontally oriented. Preferably, the workpiece table swivel axis 12 can be aligned parallel to a horizontal X-axis 7.

[0063] In another embodiment, not shown, the work spindle 4 can also be arranged above or below the workpiece table 11, and the spindle axis 5 of the work spindle 4 can be vertically aligned. In this case, the coordinate system is tilted by 90° about the X-axis 7 compared to the representation in Fig. 1, so that the Z-axis 6 is vertically aligned and parallel to the spindle axis 5, and the X-axis 7 and the Y-axis 8 are horizontally aligned.

[0064] Furthermore, it can be provided that a first pivot bearing 13 and a second pivot bearing 14 are formed, by means of which the workpiece table 11 is pivotably mounted on the machine frame 3 about the first pivot axis 12.

[0065] Furthermore, it may be provided that at least one swivel motor 15 is designed, by means of which the workpiece table 11 can be swivelled about the first swivel axis 12. The swivel motor 15 can be arranged on one of the two swivel bearings 13, 14.

[0066] Furthermore, the workpiece table 11 may include a crossbeam 16, which is arranged parallel to the workpiece table swivel axis 12. The workpiece table 11 may also include a first leg 17, by means of which the crossbeam 16 is coupled to the first swivel bearing 13, and a second leg 18, by means of which the crossbeam 16 is coupled to the second swivel bearing 14.

[0067] Furthermore, it can be provided that a rotary table 19 is arranged on the workpiece table 11, which is pivotably mounted on the workpiece table 11 about a rotary table pivot axis 20. In particular, it can be provided that the rotary table 19 is arranged on the traverse 16.

[0068] Furthermore, a machine control 21 can be provided, which serves to control the individual drives of the machine tool 1.

[0069] As can be further seen from Fig. 1, it can be provided that the workpiece 2, when it is received on the workpiece table 11, is arranged at a workpiece distance 22 to the workpiece table pivot axis 12. According to the invention, it can be provided that the workpiece distance 22 is adjustable or changeable during operation of the machine tool 1.

[0070] In a first embodiment, this can be achieved by changing the distance 23 between the crossbeam 16 and the workpiece table swivel axis 12. Several possibilities exist for this, which are described and illustrated in more detail in the further embodiments shown in Figures 2 to 6 and 8. In an alternative embodiment, it is also conceivable that the workpiece distance 22 can be adjusted by changing the distance 24 between the rotary table 19 and the crossbeam 16. The embodiments for this are described and illustrated in Figure 7.

[0071] In further embodiments, it is also conceivable that the workpiece 2 is moved parallel to the surface of the workpiece table 11. This can be, for example, a movement along the Z-axis 6 or a movement along the X-axis 7. The embodiments for this are described and illustrated in Figures 9 to 11.

[0072] Of course, it is also conceivable that to change the workpiece distance 22, both the distance 23 of the traverse 16 and the rotary table distance 24 are adjusted. Thus, the individual features of the embodiment variants of Figs. 2 to 6 and 8, as well as the embodiment variant of Fig. 7, can be combined with one another.

[0073] Furthermore, it is also conceivable that, to change the position of the workpiece relative to the workpiece table 11, both the distance 23 of the traverse 16 and the rotary table distance 24 are adjusted, and also that the workpiece is displaced along the Z-axis 6 or along the X-axis 7. Thus, the individual features of the embodiment variants of Figures 2 to 6 and 8, as well as the embodiment variant of Figure 7 and the embodiment variants of Figures 9 to 11, can be combined with one another.

[0074] Fig. 2 shows a first embodiment for adjusting the distance 23 of the traverse to the workpiece table swivel axis 12 in a schematic elevation view, where again the same reference numerals or component designations are used for identical parts as in the preceding Fig.

[0075] I can be used. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Fig. 1.

[0076] As can be seen in Fig. 2, the first leg 17 and the second leg 18 can be rigidly coupled to the crossbeam 16. To adjust the distance 23, the first leg 17 can be displaced relative to the first pivot bearing 13 of the workpiece table 11, and the second leg 18 can be displaced relative to the second pivot bearing 14 of the workpiece table 11. This can be achieved, for example, by coupling the first leg 17 to the first pivot bearing 13 of the workpiece table.

[0077] II by means of a first linear guide. Furthermore, it can be provided that the second leg 18 is coupled to the second swivel bearing 14 of the workpiece table 11 by means of a second linear guide.

[0078] In particular, it may be provided that a first drive unit 25 is designed, by means of which the first leg 17 is adjustable relative to the first pivot bearing 13. Furthermore, it may be provided that a second drive unit 26 is designed, by means of which the second leg 18 is adjustable relative to the second pivot bearing 14 of the workpiece table 11.

[0079] The first drive unit 25 can be coupled to a first spindle drive 27. The second drive unit 26 can be coupled to a second spindle drive 28. In particular, it can be provided that the spindle drives 27, 28 each comprise an adjusting spindle which interacts with a spindle nut.

[0080] As can be seen from Fig. 2, the first drive unit 25 and the second drive unit 26 can be arranged in the workpiece table 11. In particular, the first drive unit 25 and the second drive unit 26 can be arranged in the crossbeam 16 of the workpiece table 11. The spindles of the spindle drive 27, 28 can be arranged in the legs 17, 18 of the workpiece table 11. The corresponding spindle nuts can be coupled to the first pivot bearing 13 and the second pivot bearing 14, respectively.

[0081] Figure 3 shows a further, and possibly independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 and 2. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 and 2.

[0082] According to the further embodiment shown in Fig. 3, a central drive unit 29 can be provided, which serves to drive both the first spindle drive 27 and the second spindle drive 28. Appropriate distribution gearboxes can be provided here, by means of which the drive force of the central drive unit 29 can be directed to the first spindle drive 27 or to the second spindle drive 28. Otherwise, the embodiment shown in Fig. 3 can have a similar structure to that already described in connection with the embodiment shown in Fig. 2.

[0083] Figure 4 shows a further, and optionally independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 3.

[0084] As can be seen from Fig. 4, the first drive unit 25 can be arranged in the first pivot bearing 13. Furthermore, the second drive unit 26 can be arranged in the second pivot bearing 14.

[0085] In particular, it may be provided that a first rack 30 is arranged on the first leg 17. The first rack 30 can engage with a first pinion 31, which is coupled to the first drive unit 25. Furthermore, it may be provided that a second rack 32 is arranged on the second leg 18. The second rack 32 can engage with a second pinion 33, which is coupled to the second drive unit 26.

[0086] Figure 5 shows a further, and possibly independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 4. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 4.

[0087] As can be seen in Fig. 5, the first leg 17 can be pivoted about the workpiece table pivot axis 12, but fixedly mounted on the first pivot bearing 13 with respect to the first pivot bearing 13. Furthermore, the second leg 18 can be pivoted about the workpiece table pivot axis 12, but fixedly mounted on the second pivot bearing 14 with respect to the second pivot bearing 14. Additionally, the crossbeam 16 can be arranged on the first leg 17 and the second leg 18 so as to be displaceable relative to the second leg 18. The first leg 17 and the crossbeam 16, and the second leg 18 and the crossbeam 16, can each be coupled to one another by means of a linear guide.

[0088] Furthermore, it can be provided that the first drive unit 25 is accommodated in the first leg 17, which is coupled to the first spindle drive 27. Furthermore, it can be provided that the second drive unit 26 is accommodated in the second leg 18, which is coupled to the second spindle drive 28.

[0089] Figure 6 shows a further, and possibly independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 5. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 5.

[0090] As can be seen from Fig. 6, it can be provided that the first leg 17 and the second leg 18 are designed to be telescopic, whereby the length of the first leg 17 and the second leg 18 can be adjusted.

[0091] Even in such a design variant, the first drive unit 25 or the second drive unit 26 or a central drive unit 29 can be arranged in various positions, for example in the traverse 16.

[0092] Figure 7 shows a further, and possibly independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 6. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 6.

[0093] As can be seen in Fig. 7, the rotary table 19 can be mounted on the crossbeam 16 so that it is slidable relative to the crossbeam 16. This allows the distance 24 between the rotary table and the crossbeam to be adjusted. In particular, a rotary table adjustment motor 34 can be provided, by means of which the rotary table 19 can be moved relative to the crossbeam 16. Furthermore, it is also conceivable that the rotary table 19 is mounted on the crossbeam 16 so that it is slidable relative to the crossbeam 16 along the workpiece table swivel axis 12. A corresponding drive or guide mount can also be provided for this purpose. This is not shown separately in Fig. 7.

[0094] Figure 8 shows a further, and possibly independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 7. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 7.

[0095] As can be seen in Fig. 8, the first leg 17 can be coupled to the traverse 16 by means of a first pivot joint 35, and the second leg 18 can be coupled to the traverse 16 by means of a second pivot joint 36, whereby the traverse 16 can be tilted relative to the workpiece table pivot axis 12. This allows the angle of the traverse 16 relative to the workpiece table pivot axis 12 to be actively adjusted. Thus, for example, deformations of the traverse 16 or other components can be compensated for. Furthermore, it can also be provided that the angle of the traverse 16 relative to the workpiece table pivot axis 12 is actively changed to achieve an additional machining option on the workpiece 2.

[0096] Furthermore, it may also be provided that for larger pivoting of the traverse 16 relative to the workpiece table pivoting axis 12 a length compensation is provided in the traverse 16, which is not shown in Fig. 8.

[0097] Figure 9 shows a further, and possibly independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 8. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 8.

[0098] As can be seen from Fig. 9, it can be provided that a further rotary table 37 is arranged on the workpiece table 11, which is pivotably mounted on the workpiece table 11 about a further rotary table pivot axis 38. In particular, it can be provided that the further rotary table 37 is also designed to be displaceable along the workpiece table pivot axis 12 or along the X-axis 7 relative to the workpiece table 11.

[0099] In particular, it can be provided that workpieces 2 of different sizes are held on the rotary table 19 and the additional rotary table 37. The rotary table 19 and the additional rotary table 37 can be positioned on the workpiece table 11 such that both workpieces 2 can be freely swiveled about the respective rotary table swivel axes 20, 38. This allows the working area of ​​the machine tool 1 to be used to its fullest potential.

[0100] Furthermore, it is also conceivable that for workpieces 2 with a greater length than width, a displacement of the rotary table 19 and the further rotary table 37 takes place along the workpiece table swivel axis 12 or along the X-axis 7, in order to be able to rotate such workpieces 2 by 180° around the respective rotary table swivel axis 20, 38.

[0101] Figure 10 shows a further, and optionally independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 9. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 9.

[0102] Fig. 10 shows the workpiece table 11 in a top view of the traverse 16.

[0103] As can be seen in Fig. 10, the workpiece 2 can be mounted on the traverse 16 of the workpiece table 11 by means of a linear guide 39, allowing it to be displaced relative to the traverse 16. As shown in Fig. 10, the linear guide can be oriented such that, when viewed from above, the workpiece table 11 is displaced by 90° relative to the workpiece table pivot axis 12. The workpiece 2 can thus be displaced tangentially to the workpiece table pivot axis 12. This offers the advantage that, when the traverse 16 is in a horizontal position, the stroke of the working spindle 4 in the Z-axis 6 can be extended. When the traverse 16 is in a vertical position, this allows the adjustability of the working spindle 4 in the Y-axis 8 to be extended.

[0104] It is conceivable that the workpiece 2 is mounted on a simple workpiece carrier, which is slidably mounted on the traverse 16 of the workpiece table 11 by means of the linear guide 39. Furthermore, it is of course also conceivable that the workpiece 2 is mounted on the rotary table 19, which is slidably mounted on the traverse 16 of the workpiece table 11 by means of the linear guide 39.

[0105] In a variant embodiment not shown separately, the linear guide 39 can be aligned parallel to the workpiece table swivel axis 12. This allows the workpiece 2 to be moved along the X-axis 7.

[0106] Figure 11 shows a further, and optionally independent, embodiment of the workpiece table 11, whereby the same reference numerals or component designations are used for identical parts as in the preceding Figures 1 to 10. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 10.

[0107] As can be seen in Fig. 11, a second linear guide 40 can be provided on the crossbeam 16 of the workpiece table 11, which is arranged at an angle of 90° to the linear guide 39, wherein the workpiece 2 is mounted on the crossbeam 16 of the workpiece table 11 by means of a linear guide 39 and the second linear guide 40 so as to be displaceable relative to the crossbeam 16 of the workpiece table 11. Thus, the workpiece 2 can be moved along the X-axis 7 and also in a tangential direction to the workpiece table swivel axis 12.

[0108] It should be explicitly pointed out again at this point that the individual features of figures 2 to 11 can be combined with each other.

[0109] The described design variants of the workpiece tables 11 can be used for any machine tool 1 and not only for one machine tool 1 according to Fig. 1.

[0110] The exemplary embodiments show possible embodiment variants, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiment variants, but rather various combinations of the individual embodiment variants are also possible and this possibility of variation lies within the skill of the person skilled in this technical field due to the teaching on technical action by the present invention.

[0111] The scope of protection is defined by the claims. However, the description and drawings must be consulted for the interpretation of the claims. Individual features or combinations of features from the different embodiments shown and described can, in themselves, represent independent inventive solutions. The problem underlying these independent inventive solutions can be found in the description.

[0112] All references to value ranges in this description are to be understood as encompassing any and all sub-ranges thereof, e.g., the reference 1 to 10 is to be understood as including all sub-ranges, starting from the lower limit 1 and the upper limit 10, i.e., all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g., 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0113] Finally, for the sake of clarity, it should be noted that, for a better understanding of the structure, some elements have been shown not to scale and / or enlarged and / or reduced in size.

[0114] Reference numeral list

[0115] Machine tool 30 first rack

[0116] Workpiece 31 first pinion

[0117] Machine frame 32 second rack

[0118] Working spindle 33 second pinion

[0119] Spindle axis 34 Rotary table adjustment motor

[0120] Z-axis 35 first swivel joint

[0121] X-axis 36 second swivel joint

[0122] Y-axis 37 additional rotary table

[0123] B processing tool 38 additional rotary table swivel axis

[0124] Workpiece clamping device 39 Linear guide

[0125] Workpiece table 40 second linear guide

[0126] Workpiece table swivel axis, first swivel bearing; workpiece table, second swivel bearing; workpiece table

[0127] Swivel motor

[0128] Traverse first leg second leg

[0129] Round table

[0130] Rotary table swivel axis

[0131] Machine control workpiece distance From distance

[0132] Rotary table spacing first drive unit second drive unit first spindle drive second spindle drive central drive unit

Claims

Patent claims 1. Machine tool (1) comprising: - a machine frame (3); - at least one working spindle (4) which is rotatably mounted about a spindle axis (5); - a workpiece clamping device (10), wherein the workpiece clamping device (10) comprises a workpiece table (11) which is designed to receive at least one workpiece (2), wherein a first pivot bearing (13) and a second pivot bearing (14) are provided, by means of which the workpiece table (11) is pivotably mounted about a workpiece table pivot axis (12), wherein the workpiece table (11) comprises a crossbeam (16) which is arranged parallel to the workpiece table pivot axis (12), wherein the workpiece table (11) comprises a first leg (17) by means of which the crossbeam (16) is coupled to the first pivot bearing (13) and wherein the workpiece table (11) comprises a second leg (18) by means of which the crossbeam (16) is coupled to the second pivot bearing (14); - a machine control (21), characterized in that the workpiece (2) is mounted on the workpiece table (11) in a manner displaceable relative to the workpiece table pivot axis (12).

2. Machine tool (1) according to claim 1, characterized in that a workpiece distance (22) of the workpiece (2) to the workpiece table pivot axis (12) is adjustable.

3. Machine tool (1) according to claim 2, characterized in that a distance (23) of the traverse (16) to the workpiece table swivel axis (12) is adjustable.

4. Machine tool (1) according to claim 3, characterized in that the first leg (17) and the second leg (18) of the workpiece table (11) are designed to be length-adjustable.

5. Machine tool (1) according to one of the preceding claims, characterized in that the first leg (17) and the second leg (18) of the workpiece table (11) are telescopic.

6. Machine tool (1) according to one of the preceding claims, characterized in that the first leg (17) of the workpiece table (11) is slidably received on the first pivot bearing (13) and the second leg (18) of the workpiece table (11) is slidably received on the second pivot bearing (14).

7. Machine tool (1) according to one of the preceding claims, characterized in that a first drive unit (25) is designed for adjusting the first leg (17) and a second drive unit (26) is designed for adjusting the second leg (18).

8. Machine tool (1) according to claim 7, characterized in that the first drive unit (25) is coupled to a first spindle drive (27) for adjusting the first leg (17) and the second drive unit (26) is coupled to a second spindle drive (28) for adjusting the second leg (18).

9. Machine tool (1) according to one of claims 1 to 6, characterized in that a central drive unit (29) is designed for adjusting the first leg (17) and the second leg (18).

10. Machine tool (1) according to one of the preceding claims, characterized in that a rotary table (19) is arranged on the workpiece table (11), which is pivotably mounted on the workpiece table (11) about a rotary table pivot axis (20), wherein a rotary table distance (24) of the rotary table (19) to the traverse (16) is adjustable, wherein a rotary table adjustment motor (34) is provided, which serves to adjust the rotary table distance (24).

11. Machine tool (1) according to one of the preceding claims, characterized in that the workpiece (2) is mounted on the workpiece table (11) in a manner displaceable parallel to the workpiece table pivot axis (12).

12. Machine tool (1) according to claim 11, characterized in that a rotary table (19) is arranged on the workpiece table (11), which rotates around a The rotary table pivot axis (20) is pivotably mounted on the workpiece table (11), wherein the rotary table (19) is designed to be displaceable along the workpiece table pivot axis (12) relative to the workpiece table (11).

13. Machine tool (1) according to claim 12, characterized in that a further rotary table (37) is arranged on the workpiece table (11), which is pivotably mounted on the workpiece table (11) about a further rotary table pivot axis (38), wherein the further rotary table (37) is designed to be displaceable along the workpiece table pivot axis (12) relative to the workpiece table (11).

14. Machine tool (1) according to one of the preceding claims, characterized in that the first leg (17) is coupled to the traverse (16) by means of a first pivot joint (35) and the second leg (18) is coupled to the traverse (16) by means of a second pivot joint (36), wherein the traverse (16) is tiltable relative to the workpiece table pivot axis (12).

15. Machine tool (1) according to one of the preceding claims, characterized in that the workpiece (2) is mounted on the traverse (16) of the workpiece table (11) by means of a linear guide (39) so as to be displaceable relative to the traverse (16).

16. Machine tool (1) according to claim 15, characterized in that a second linear guide (40) is formed on the traverse (16) of the workpiece table (11), which is arranged at an angle of 90° to the linear guide (39), wherein the workpiece (2) is displaceably mounted on the traverse (16) of the workpiece table (11) by means of a linear guide (39) and the second linear guide (40).

17. Method for operating a machine tool (1) with a machine frame (3), a working spindle (4) rotatably mounted about a spindle axis (5), and a workpiece clamping device (10), wherein the workpiece clamping device (10) comprises a workpiece table (11) designed to receive at least one workpiece (2), wherein a first pivot bearing (13) and a second pivot bearing (14) are provided, by means of which the workpiece table (11) can be rotated about a The workpiece table swivel axis (12) is pivotably mounted, wherein the workpiece table (11) comprises a traverse (16) which is arranged parallel to the workpiece table swivel axis (12), wherein the workpiece table (11) comprises a first leg (17) by means of which the traverse (16) is coupled to the first swivel bearing (13) and wherein the workpiece table (11) comprises a second leg (18) by means of which the traverse (16) is coupled to the second swivel bearing (14), comprising the process steps: - Machining of the first workpiece (2) using the first work spindle (4); characterized in that a workpiece distance (22) of the workpiece (2) to the workpiece table swivel axis (12) is adjusted.

18. Method according to claim 17, characterized in that the workpiece distance (22) of the workpiece (2) to the workpiece table pivot axis (12) is adjusted when the workpiece table (11) is pivoted by an angle greater than 80° about the workpiece table pivot axis (12).

19. Method according to claim 17 or 18, characterized in that when pivoting the workpiece (2) about a rotary table pivot axis (20) the workpiece (2) is moved parallel to the workpiece table pivot axis (12).

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