Clamping module system for a machine tool

Abstract

Clamping module system for a machine tool, comprising a set of several combinable clamping modules (1, 1.1,...,1.n), wherein each of the clamping modules (1, 1.1,...,1.n) has a base body (2) with a first clamping surface (3) for securing its position relative to the machine tool, and comprising a clamping arrangement arranged at least partially in the base body (2) for generating a clamping force directed against the first clamping surface (3), and wherein the clamping arrangement comprises a clamping bolt (4, 4.2) with a coupling device (15, 15.2) and a manually actuated clamping slide (7, 7.1, 7.2) which is in an angular position relative to the clamping bolt (4, 4.2), and wherein the clamping bolt (4, 4.2) and the clamping slide (7, 7.1, 7.2) have mutually interacting conical surfaces (9.1, 9.2, 9.3), and wherein the first clamping surface (3) has a perpendicular first bore (5) for introducing the clamping bolt (4, 4.2) into the base body (2), characterized by the fact that at least one fitting groove (10.1,...,10.6) is present on the first clamping surface (3), wherein the longitudinal axis (11) of the fitting groove (10.1,...,10.6) intersects the axial axis (6) of the first bore (5) at right angles and in the slot (10.1,..., 10.6) at least one T-nut (12.1,...,12.2) is arranged, which in the intended assembled state projects beyond the first clamping surface (3), wherein the T-nut (12.1,...,12.2) is removable and / or retractable from the first clamping surface (3) and the clamping bolt (4, 4.2) is interchangeable and axially movable in the first bore (5) in such a way as to prevent loss that the coupling device (15, 15.2) on the clamping bolt (4, 4.2) projects further towards the first clamping surface (3) than the T-nut (12.1,...,12.2) in the intended mounted state and wherein the clamping bolt (4, 4.2) is designed as an interchangeable part and the clamping module system includes different clamping bolts (4, 4.2), wherein at least one of the clamping bolts (4, 4.2) has a coupling device (15, 15.2) with undercuts for clamping on a T-slot table and at least one further clamping bolt (4, 4.2) has a coupling device (15, 15.2) for attaching a first clamping module (1, 1.1,...,1.n) to a second clamping module (1, 1.1,...,1.n), wherein the coupling device (15, 15.2) of the further clamping bolt (4, 4.2) has a second conical surface (9.2) which is designed for interaction with the conical surface (9.1, 9.2, 9.3) on the clamping slide of the second clamping module (1, 1.1,...,1.n).

Description

[0001] The invention relates to a clamping module system for a machine tool.

[0002] For clamping workpieces on a machine tool, zero-point clamping systems are known for precise changeovers. These require the attachment of clamping bolts to the workpieces and corresponding modules with bolt holders. On conventional milling machines, especially those with T-slotted worktables, workpieces are held in a vise or directly attached to the worktable using clamping jaws.

[0003] Furthermore, clamping arrangements with clamping bolts and clamping slides featuring interacting conical surfaces for grid clamping systems have been proposed. Examples are referenced in DE 3315097 C1, DE 3821632 A1, DE 1602912 B, and DE 8815039 U1. Further clamping devices are described in DE 10342469 A1, DE 102016012169 A1, and DE 102014112843 B4. A disadvantage of the known clamping modules for classic tool tables with a mounting grid is their limited configurability and expandability.

[0004] The invention is based on the objective of providing a clamping module system for holding workpieces on a machine table of a machine tool, in particular a T-slot table, which is modular in design and universally adaptable to different workpiece geometries.

[0005] This problem is solved by the clamping module system mentioned in claim 1. Advantageous embodiments are described in the dependent claims.

[0006] The invention is based on a clamping module of the generic type for holding a workpiece on the machine table of a machine tool. The clamping module comprises a base body with a first clamping surface for securing the workpiece's position relative to the machine tool. The first clamping surface can be in direct contact with the machine table, or the position can be secured indirectly by the arrangement of at least one further spacer element between the machine table and the first clamping surface.

[0007] Furthermore, the clamping module comprises a clamping arrangement, at least partially integrated into the base body, for generating a clamping force directed against the first clamping surface. The clamping arrangement includes a clamping bolt with a coupling device and a manually actuated clamping slide positioned at an angle to the clamping bolt. Additionally, the clamping bolt and the clamping slide feature mutually interacting conical surfaces. In its intended assembly state, the coupling device creates a tensile-resistant connection to the machine tool side, particularly the machine table, or to an intermediate spacer element.

[0008] The first clamping surface features a vertical bore for inserting the clamping bolt into the base body. The clamping arrangement is designed so that a manual adjustment of the clamping slide by the user causes the clamping bolt to retract axially within the first bore. The necessary mechanical coupling is achieved by the interacting conical surfaces on the clamping bolt and the clamping slide.

[0009] In a preferred embodiment, the user can actuate the clamping arrangement from different directions. For this purpose, at least two clamping slides positioned at an angle to each other are provided. To move the clamping bolt, it is sufficient for one of the clamping slides to interact with the corresponding conical surface on the clamping bolt at its conical surface. The redundant clamping slide arrangement facilitates the installation of the clamping module in a clamping module system consisting of several individual modules, where access to some of the clamping slides is concealed. Advantageously, at least two thrust channels for receiving clamping bolts extend from different side faces or edges on the base body and preferably run perpendicular to the axial axis of the first bore in which the clamping bolt is guided.

[0010] Furthermore, for an advantageous further design, the clamping module includes a functionally separate second clamping arrangement in addition to the first. Thus, a second vertical bore is provided on a second clamping surface, which serves to insert a second clamping bolt. A separate additional clamping slide is provided for actuating the second clamping arrangement, with this slide and the second clamping bolt featuring engaging conical surfaces. The second clamping arrangement facilitates the mutual connection of two clamping modules to form a modularly expandable clamping module system.

[0011] Furthermore, the clamping module has at least one locating groove on the first clamping surface, wherein the longitudinal axis of the locating groove intersects the axial axis of the first bore at a right angle, and at least one T-nut is arranged in the locating groove, which, in the intended mounted state, projects beyond the first clamping surface. The T-nut allows for at least a partially angularly defined fixation of the base body relative to the axial axis of the first bore. If several locating grooves arranged at an angle to each other on the first clamping surface are used, a position-defined fixation on a machine table equipped with a complementary T-slot system can be achieved by means of a T-nut arrangement in these grooves. This enables the re-clamping of a workpiece and its return to a defined position, corresponding to a zero-point clamping system.

[0012] Preferably, at least two locating grooves, aligned at right angles to each other, are provided on the first clamping surface. A particularly preferred embodiment includes one locating groove arranged at right angles and, in addition, two diagonally extending locating grooves, wherein the longitudinal axes of all locating grooves intersect at a point lying on the axial axis of the first bore. All locating grooves are preferably designed such that at least one fitting block can be selectively arranged in each of them.

[0013] To further improve its universal applicability, the clamping module is designed with the T-nuts attached to the base body in a removable and / or retractable manner relative to the first clamping surface. In a preferred embodiment, T-nut holders are provided on the base body along the respective T-nut groove, with the T-nuts, in the simplest case, being removable via a screw connection. The removable T-nuts allow for the adjustment of different stop configurations. By removing the T-nuts, the clamping module can also be attached to a spacer element without complementary T-nut receptacles.Furthermore, it is possible to secure an angular position between the table-side groove axes on a classic machine table with parallel or right-angled slots by configuring the clamping module without T-nuts, using friction locking by pressing the first clamping surface against it with the clamping bolt.

[0014] The variant with retractable T-nuts attached to the first clamping surface covers another application. This allows for a change from a first mounting position, in which the T-nuts protrude into the first machine-side mounting points, to a second mounting position without having to remove the entire workpiece holder from the machine table. To achieve this, after retracting the T-nuts, the clamping arrangement is loosened sufficiently to allow the base body to rotate around the axial axis of the first bore. The clamping module, with the first mounting surface sliding on the machine-side counter surface, can then be moved into the second mounting position. In this second position, provided that second machine-side mounting points are present, the T-nuts can be extended again to serve as position-defining stops.

[0015] Additionally, the clamping module is designed so that the clamping bolt in the first bore is replaceable and axially movable, guided in such a way that the coupling device on the clamping bolt projects further forward relative to the first clamping surface than the T-nuts in their intended installed state. This extended projection of the coupling device allows it to be positioned on the machine-side counterpart in a first assembly step, with the position-limiting T-nuts subsequently engaging. Thus, a clamping module with a coupling device adapted to a T-slot table can initially be positioned from the table side before the selected T-nut configuration fully engages in the table-side receptacles.It is also possible to place the workpiece from above with a coupling device that is only initially secured on the table side, or to partially lift it off without completely detaching the coupling device from the counterpart on the tool table, for a simplified change of position of a workpiece to be machined.

[0016] Furthermore, the universal applicability of the clamping module is improved by the design of the clamping bolt as a replaceable part. This allows the clamping module to be fixed to different spacers. Accordingly, the clamping bolt is replaceable in the first bore, axially movable, and guided in a captive manner. The captive insertion into the first bore simplifies handling, as the clamping module can be moved directly from above onto a machine table after replacing a clamping bolt, without the need for prior actuation of the clamping slide to prevent it from falling out.The loss-proof design is preferably achieved by matching the inner contour of the first bore on the base body to the outer contour of the clamping bolt, resulting in a sufficient frictional fit that provides a static friction force exceeding the maximum weight of the clamping bolt in an upside-down position of an unmounted clamping module.

[0017] The design of the clamping bolt as an interchangeable part enables a clamping module system according to the invention, comprising a set of several combinable clamping modules, wherein different clamping bolts compatible with each clamping module are provided for each of the clamping modules in the set. A set with clamping bolts featuring different coupling devices is advantageous. Coupling devices with undercuts for clamping on a T-slot table are preferred, and these can be designed as a size-graduated set for different T-slot dimensions. Additionally, it is advantageous to provide a clamping module that has a screw thread as a coupling device, so that a bore that can be positioned against a spacer element in combination with a rear-facing lock nut, or a bore with an internal thread for machine-side fastening, is sufficient.

[0018] In a further preferred embodiment, a coupling device is provided on the clamping bolt, allowing a first clamping module to be attached to a second clamping module. For this purpose, the coupling device can advantageously include a second conical surface, which is designed to interact with the conical surface on the clamping slide of the second clamping module. In such an embodiment, when properly assembled, the first and second clamping modules share a common clamping bolt with conical surfaces at both axial ends.

[0019] In a further preferred design of the clamping bolt, it has an extended projection that allows passage through an additional component of the clamping system. In the simplest case, this is a spacer or angle element with an arrangement of clamping surfaces and a through-channel. The extended clamping bolt is guided through the through-channel for assembly and, by means of its coupling device, allows connection to a spacer element located behind it. For an advantageous further design, passage through a second clamping module is also possible.

[0020] Preferred are also versions of the clamping module with through-holes in the base body, the longitudinal axis of which deviates from the first bore for the module's own clamping bolt. It is advantageous to have a through-hole on a side face of the base body that is oriented perpendicular to the clamping surface, allowing an additional part of the clamping system to be inserted into the through-hole. If the clamping system has several clamping modules with cuboid base bodies and through-holes oriented perpendicular to the side faces of the base bodies, a modular arrangement for workpiece fixation can be easily set up on a machine table.

[0021] Preferably, the base of the clamping module incorporates a vise for workpiece holding. This allows for clamping a workpiece without direct contact with the machine table. This makes it possible to maintain the connection between the clamping module and the workpiece during position changes on the machine table and to position the connected unit as a whole for the next machining operation. The universal design of the clamping module facilitates repeatable positioning relative to the machine side. Additionally, the clamped workpiece, along with the clamping module, can be easily transferred from one machine tool to another and held in place for the next machining step.

[0022] A vise for workpiece holding on a clamping module can have one or more movable clamping jaws, with at least two clamping jaws equipped with separate adjusting devices being preferred for variable adjustment of the workpiece position relative to the holding clamping module. Furthermore, synchronous actuation of a group of vises is particularly advantageous for large workpieces that require a clamping module system with several clamping modules spaced apart on the machine table for twist-free holding. Accordingly, a common actuating element for the operation of spatially separated vises placed on a row of clamping modules is advantageously provided for a set for configuring a clamping module system.

[0023] In a further preferred embodiment of the clamping module, a second clamping surface is arranged on the base body, wherein the second clamping surface has a flat surface and / or at least one T-slot and / or at least one bushing with internal thread and / or at least one second bore for receiving a clamping bolt and / or at least one locating groove. Such a design allows two or more clamping modules to be joined together, resulting in a modularly expandable holding arrangement adapted to the workpiece to be machined.

[0024] In another preferred embodiment, the clamping module features a clamping slide that, in its intended assembly state, is completely enclosed within a shear channel inside the base body. This results in unobstructed and safe handling. Additionally, the modular assembly of the clamping modules is simplified. For special applications, clamping slides can be provided that, in their intended assembly state, extend partially outside a shear channel. For example, it is particularly advantageous for clamping large components to use at least two clamping modules, spatially separated and fixed on a machine table, with a common clamping slide connecting the two clamping modules for synchronous actuation.

[0025] For a further advantageous embodiment, a sealing arrangement for the thrust channel is provided on the clamping slide, thus making it more difficult for foreign matter and cutting oil to penetrate the base body. Manual actuation of the clamping slide is further facilitated if it has a screw section with a multi-start thread. This allows for a higher actuation speed compared to a single thread. Preferably, an internal hexagon socket is provided on the outside of the screw section, ensuring secure engagement with an Allen key for actuating the clamping slide.

[0026] A multi-part, and in particular a two-part, design of the clamping slide is also advantageous. For this purpose, the clamping slide advantageously comprises a thrust element rotatably mounted on the screw section and supporting the conical surface, wherein the thrust element has a non-circular cross-section, preferably a rectangular cross-section. A rotary coupling is particularly preferred, which transmits axially directed thrust and tensile forces from the screw section to the thrust element, thus eliminating the need for a separate return mechanism. For this purpose, a first channel section with an internal thread for receiving the screw section and a second channel section for receiving the thrust element are provided on the thrust channel, wherein the second channel section is designed such that the thrust element is guided translationally and with rotational rigidity.On the sliding element, which does not rotate during actuation, a widened conical surface can be applied for interaction with a ring cone on the associated clamping bolt. For an alternative design, the interacting conical surfaces on the clamping slide and the clamping bolt feature complementary index elements that enforce defined angular positions of the clamping bolt relative to the base body. Thus, for such a design, angular specifications for the alignment of the coupling device on the clamping bolt can be set. This results in the possibility of approaching and securing predefined angular positions of the clamping module relative to the spacer element when actuating the clamping arrangement. Index elements on the clamping bolt can also be used for rotation protection, which allows a locking screw on the coupling device to be tightened when the clamping module is mounted.

[0027] The interchangeable design of the clamping bolt required according to the invention, and the additional provision of a captive guide in the first bore of the base body, can be advantageously realized if a first cylindrical guide section with a first cross-sectional diameter and a second cylindrical guide section with a second cross-sectional diameter larger than that of the first are present on the outer contour of the clamping bolt. The conical surface is formed between the first cylindrical guide section and the second cylindrical guide section. This design allows for simplified insertion, since initially a smaller cross-section enters the first bore, which provides axial centering for further insertion.The axially following second cylindrical guide section can be precisely matched to the clear diameter of the first bore to ensure the required frictional fit and adequate sealing against foreign objects. Since high forces are necessary to remove such a clamping bolt, a blow-out channel for pressing the clamping bolt out of the first bore is incorporated into the base body for optimal design. This channel can be designed to accommodate standard workshop compressed air guns for the blow-out process.

[0028] Preferably, the clamping module system according to the invention provides a set of several combinable clamping modules according to the invention and several interchangeable clamping bolts, which additionally includes supplementary parts, such as intermediate plates or brackets, which themselves do not have clamping arrangements, but are designed to be coupling-compatible with the clamping modules by means of a design with locating grooves and through-holes. With such a clamping module system according to the invention, a modular and universal workpiece holding arrangement can be created on a conventional machine table of a machine tool.

[0029] The following are exemplary embodiments of the invention in connection with figural representations. These show, schematically, the following: Fig. Figure 1 shows a first embodiment of a clamping module of the clamping module system in exploded view. Fig. Figure 2 shows the first embodiment from Fig. 1 in the properly assembled state in perspective view. Fig. Figure 3 shows different arrangements of the clamping module. Fig. 1 on a workbench. Fig. Figure 4 shows a perspective view of the clamping bolt of the first embodiment, which forms a replacement part. Fig. Figure 5 shows a perspective view of the clamping bolt of a second embodiment, which forms a replacement part. Fig. Figure 6 shows a perspective view of the clamping slide of the first embodiment in a decoupled position. Fig. Figure 7 shows a perspective view of the clamping slide of the first embodiment in a coupled position. Fig. Figure 8 shows a clamping module system with three clamping modules according to the first embodiment in assembly position on a tool table. Fig. Figure 9 shows a clamping module system with three clamping modules according to the first embodiment in a position raised from the tool table. Fig. Figure 10 shows a second clamping module system with two clamping modules according to the first embodiment. Fig. Figure 11 shows a further embodiment of the clamping module according to the invention. Fig. Figure 12 shows a second clamping module system with three clamping modules according to the second embodiment in assembly position on a tool table. Fig. Figure 13 shows a third clamping module system as an extension of the clamping module system from Fig. 12 with two clamping modules according to the first embodiment. Fig. Figure 14 shows a third embodiment of the clamping module in exploded view. Fig. Figure 15 shows a fourth clamping module system with two clamping modules according to the first and second embodiments in exploded view. Fig. Figure 16 shows a supplementary part of the clamping module system. Fig. Figure 17 shows an extension of the fourth clamping module system with the supplementary part made of Fig. 16 and a further clamping module according to the first embodiment.

[0030] Fig. Figure 1 shows a schematically simplified embodiment of a clamping module 1 of the clamping module system in an exploded view. A base body 2 is shown with a first clamping surface 3 on its underside, which serves to secure the workpiece in position, particularly on a machine tool (not shown in detail). The first clamping surface 3 has a square shape. For the embodiment shown, a vise 16 is provided for holding a workpiece (not shown in detail). The fixed clamping jaw 17 of the vise 16 is held by a screw arrangement 18 and forms part of the base body 2. A metric screw 20 according to DIN 912 is associated with the movable clamping jaw 19.

[0031] The clamping module 1 comprises a clamping arrangement with a clamping bolt 4, which is a replaceable part. In the operating position, the clamping bolt 4 is guided in a first bore 5, which extends from the clamping surface 3, allowing for replacement and axial movement without loss. The axial axis 6 of the first bore is perpendicular to the first clamping surface 3 and passes through its center point. A manually actuated clamping slide 7, positioned at an angle to the clamping bolt 4, serves to generate a retracting axial force. A thrust channel 8 with an internal thread 23, extending from a side surface of the base body 2, is provided to guide the clamping slide 7. Conical surfaces 9.1 and 9.2 are provided on both the clamping bolt 4 and the clamping slide 7. In the operating position, these surfaces interact with each other such that an inward axial movement of the clamping slide 7 retracts the clamping bolt 4 in the first bore 5.

[0032] Furthermore, three locating grooves 10.1, 10.2, 10.3, 10.4 are arranged on the first clamping surface, forming a right-angled pattern and aligning with each other in pairs. The longitudinal axes 11 of the grooves assigned to the locating grooves 10.1, 10.2, 10.3, 10.4 intersect the axial axis 6 of the first bore 5 at right angles. The locating grooves 10.1, 10.2, 10.3, 10.4 are designed to receive T-nuts, which are detachably attached to the base body 2. For this purpose, in Fig. 1 An example of an unmounted T-nut 12.1 for screwing into a bore 13.1 with an internal thread at the base of the slot 10.1, which serves as a slot holder, is shown.

[0033] Fig. Figure 2 shows the first embodiment in its intended assembled state in a perspective view. A linear arrangement of T-nuts 12.1, 12.2 and a clamping bolt 4 in their assembled position are shown, projecting beyond the first clamping surface 3. It is evident that, in the intended assembled state, a projecting portion is present on the clamping bolt 4, forming a coupling device 15 adapted to a T-slot table. This coupling device projects further beyond the first clamping surface 3 than the T-nuts 12.1, 12.2. This results in various configuration and application possibilities for the clamping module 1 for workpiece clamping. Figure 2 illustrates this. Fig. 3 for three clamping modules 1.1, 1.2, 1.3 different position fixings on a machine-side tool table 21 with T-slots 22.1,..., 22.n.

[0034] The clamping module 1.2 is configured without T-nuts and has a coupling device 15 designed to be form-compatible with the T-slots 22.1,..., 22.n. Thus, after the coupling device 15 engages in one of the T-slots 22.1,..., 22.n on the tool table 21, a degree of rotational freedom about the axial axis 6 of the clamping bolt 4 remains, so that by tightening the clamping bolt 4 with the clamping slide 7, a freely selected angular position relative to the longitudinal axis of the T-slot 22.1,..., 22.n can be frictionally locked.

[0035] The clamping module 1.3 has the following features: Fig. Configuration 2 is shown. Two T-nuts 12.1 and 12.2, forming a linear arrangement, are mounted, with the assembly in the Fig. The clamping slots 10.1 and 10.3 shown in Figure 1 are designed to fit the profile of the T-slot 22.1,..., 22.n so precisely that, after the clamping module 1.3 is inserted from the side of the tool table 21, rotation about the axial axis 6 of the clamping bolt 4 is not possible. This ensures that the vise 16 for workpiece support is always aligned parallel to the respective T-slot along which the clamping module 1.2 can be moved longitudinally. Once the target position is reached, the clamping arrangement is finally locked by actuating the clamping slide 7.

[0036] To align the vise 16 at a right angle to the T-slot, as shown for clamping module 1.1, T-nuts are inserted into the Fig. The T-nuts shown in Figure 1, offset by 90°, are inserted during configuration. For a further design not shown, the T-nuts can be retractably mounted on the base body. With this design, it is possible to use a clamping module located on the T-slot table for different fixed positions after loosening the clamping bolt and without lifting the module, thus changing the T-nut arrangement.

[0037] Fig. Figure 4 shows a perspective view of the clamping bolt 4 of the first embodiment. Visible is the conical surface 9.2, necessary for the engagement of the clamping slide (not shown), which is located between a first cylindrical guide section 24 and a second cylindrical guide section 25. The cross-sectional diameters of the cylindrical guide sections 24, 25 are selected such that the clamping bolt 4 remains securely attached to the base body 2, even with only partial insertion into the first bore 5 of the base body 2 and without engagement of the conical surfaces 9.1, 9.2, solely due to friction, even when the clamping module 1 is guided overhead for mounting on the tool table 21.

[0038] The cylindrical guide sections 24, 25 are provided with chamfers 26.1, 26.2, which facilitate the insertion of the clamping bolt 4 into the first bore 5. Additionally, the cross-sectional diameter of the first cylindrical guide section 24 is smaller than that of the second cylindrical guide section 25. Thus, when the clamping bolt 4 is inserted, it is first centered by means of the first cylindrical guide section 24, which facilitates the insertion of the second cylindrical guide section 25, the cross-sectional diameter of which is precisely matched to the clear diameter of the first bore.

[0039] By exchanging the clamping bolt 4, the clamping module 1 can be used on different tool tables 21. Additionally, an interchangeable clamping bolt 4 expands the possible coupling options for a clamping module system with multiple clamping bolts 4. Therefore, a clamping module system according to the invention preferably provides a set with different clamping bolts 4 that differ in the design of the coupling device 15. Fig. Figure 5 shows a second embodiment of a clamping bolt 4.2, which has a coupling device 15.2 that is compatible with the clamping arrangement of another clamping module. The same reference numerals are used for the features that correspond to the first embodiment. A symmetrically designed clamping bolt 4.2 is shown, which has a further conical surface 9.3 that is located between a second cylindrical guide section 25.2 and a third cylindrical guide section 27.

[0040] Fig. 6 and Fig. Figure 7 shows the two-part embodiment of the clamping slide 7 with a shear element 28 having a rectangular cross-section, on which an extended conical surface 9.1 is provided for interaction with a conical surface 9.2 in the form of an annular cone on the associated clamping bolt 4. The shear element 28 serves for translational movement in a shape-compatible section of the shear channel 8 (not shown) on the base body 2. Furthermore, a screw section 29 with a multi-start thread 30 is provided, which corresponds to the one described in Figure 7. Fig. The internal thread 23 shown in Figure 1 is assigned to the thrust channel 8. The multi-start thread design allows for quick manual actuation by engaging the internal hexagon socket 31 on the end face with an Allen key. Furthermore, a sealing arrangement 32 is provided on the screw section 29, which prevents the entry of chips into the thrust channel 8. In the illustrated embodiment, the sealing arrangement 32 is a shank on the screw section 29 that fits precisely into the thrust channel 8.

[0041] A summary of Fig. 6 and Fig. Figure 7 illustrates the connection of the shear element 28 to the screw section 29 for transmitting axially directed shear and tensile forces. For this purpose, a nozzle 33 with an annular groove 34 is provided on the screw section 29, which, as shown in Fig. 7 shown, is inserted into an axial bore 35 on the thrust element 28 and secured with dowel pins 36.1, 36.2.

[0042] Fig. 8 and Fig. Figure 9 shows a clamping module system 37 with three identical clamping modules 1.1, 1.2, 1.3 arranged linearly on a tool table 21, according to the first embodiment, in a mounted and a dismounted position. The clamping module system 37 holds a workpiece 38, which, together with the base bodies of the clamping modules 1.1, 1.2, 1.3, can be lifted from the tool table 21 as a single machining unit. The clamping bolts 4.1, 4.2, 4.3 of the clamping modules 1.1, 1.2, 1.3 remain behind. After a machine change, the machining unit can be reset to its original machining position, similar to a zero-point clamping system. A stop 39 on the tool table 21 serves to define the original position.

[0043] In Fig. Figure 10 shows a second clamping module system 37.2 with two spaced-apart, linearly arranged clamping modules 1.4, 1.5 according to the first embodiment, which serves to form a long-reach vise 16.2 for holding a large workpiece (not shown in detail) on a tool table 21. It is evident that only the fixed clamping jaw 17 is used on clamping module 1.4, while clamping module 1.5 has an inverted, movable clamping jaw 19. A common metric screw 20.2 with an extended threaded section is used as the vise drive for both clamping modules 1.4, 1.5.

[0044] A second embodiment of the clamping module 1.6 with a clamping bolt 4 partially inserted to a captive position is shown in Fig. Figure 11 shows the features that correspond to the first embodiment. The same reference numerals are used for the features that correspond to the first embodiment. It is evident that instead of a vise on the base body 2.2, there is a second clamping surface 40, parallel to the first clamping surface 3.2, with a T-slot 41. In addition, as shown in Figure 11, the following features are also present: Fig. As can be seen in Figure 12, the second clamping surface 40 has locating grooves 10.5, 10.6, which are arranged perpendicular to the T-slot 41. Thus, the second clamping surface 40 is designed such that another clamping module can be attached to it with its first clamping surface 3. As shown by way of example in Fig. 12 and Fig. As shown in Figure 13, this enables the construction of modular clamping module systems. It is evident that two clamping modules 1.6, 1.7 of the second embodiment are connected as a stack on a tool table 21. In the horizontal direction, a connection for aligning spaced-apart clamping modules 1.6, 1.8 according to the second embodiment is created by means of the cylindrical supplementary parts 42.1, 42.2, which extend through bores 43.1, 43.2 in the base body 2.2. As shown in Fig. As shown in Figure 13, the clamping system can be extended by adding clamping modules 1.9, 1.10 of the first embodiment.

[0045] The clamping modules 1.6, 1.7, 1.8 of the second embodiment, intended for stacking, have a base dimension that is adapted to the T-slot grid of the tool table 21. Thus, the length and width of the first clamping surface 3.2 correspond to the transverse spacing of the T-slots. Additionally, the height of the clamping modules 1.6, 1.7, 1.8 is chosen as an integer divisor of the transverse spacing, in this case half.

[0046] The precise fit of the clamping bolt 4, 4.2 to the clamping modules 1 necessitates high pull-out forces. Therefore, for the in Fig. In the advantageous design shown in Figure 11, a blow-out channel 44 is provided on the base body 2.2, which opens into the first bore 5. A standard compressed air gun can be attached to this for pressing out the clamping bolt.

[0047] Fig. Figure 14 shows a third embodiment of the clamping module 1.11 with a fully inserted clamping bolt 4. The same reference numerals are used for the features that correspond to the first and second embodiments. Two clamping slides 7.1, 7.2 and two associated thrust channels 8.1, 8.2 are provided, extending from chamfered corner surfaces on the base body 2.3 and positioned at an angle to improve accessibility. The arrangement is redundant, so that one of the two clamping slides 7.1, 7.2 is sufficient to actuate the clamping bolt.

[0048] For modular expansion, bores 45.1, 45.2 are provided on the clamping module 1.11, perpendicular to the first clamping surface 3.3. Cylindrical extension parts 42.3, 42.4 can be inserted into the bores 45.1, 45.2 and fixed with the locking element 46.1. A clamping module 1.6 according to the second embodiment is then placed on top, resulting in an angled arrangement.

[0049] Fig. Figure 15 further clarifies that at the first bore 5.2 of the first clamping surface 3.2 of the clamping module 1.6 of the in Fig. The 5 symmetrical clamping bolts shown in 4.2 can be used for coupling another clamping module. Fig. Figure 16 shows an example of a supplementary part used for this purpose in the form of an intermediate plate 47, which has two coplanar contact surfaces 48.1, 48.2, on which there are right-angled, relative to each other at an angle of 45°, fitting groove patterns 49.1, 49.2. Fig.Figure 17 illustrates that a clamping module 1.1 according to the first embodiment can be held in a defined 45° inclined position via the intermediate plate 47. Preferably, the clamping module system comprises further parts, which are not shown in detail. Additionally, components compatible with the parts of the set and tailored to the respective clamping requirements can extend the clamping module system. For example, intermediate plates can be used that provide at least one side surface as a compatible clamping surface and have a user-specific design with an adapted groove pattern on another side. Reference symbol list 1, 1.1,...,1.n clamping module 2, 2.2, 2.3 Basic body 3, 3.2, 3.3 first clamping surface 4, 4.2 Tension bolts 5 first drilling 6 Axial axis 7, 7.1, 7.2 Tensioning slide 8, 8.1, 8.2 Thrust channel 9.1, 9.2, 9.3 Cone surface 10.1,...,10.6 Fitnut 11 Longitudinal axis of the groove 12.1,...,12.2 Nutstein 13.1,...,13.4 Bore 15, 15.2 Coupling device 16, 16.2 Vise 17 fixed clamping jaws 18 screw arrangement 19 movable clamping jaws 20, 20.2 metric screw 21 Tool table 22.1,..., 22.n T-slot 23 internal threads 24, 24.2 first cylindrical guide section 25 second cylindrical guide section 26.1, 26.2 Edge chamfer 27 third cylindrical guide section 28 shear element 29 screw section 30 multi-start thread 31 Hex socket 32 Sealing arrangement 33 stocks 34 Ring groove 35 axial bore 36.1, 36.2 Dowel pin 37, 37.2 Clamping module system 38 workpieces 39 attacks 40 second clamping surface 41 T-slot 42.1,...,42.4 Supplementary part 43.1, 43.2 bore 44 Exhaust duct 45.1, 45.2 bore 46.1, 46.2, 46.3 Safety element 47 Intermediate plate 48.1, 48.2 Plant area 49.1, 49.2 Fit pattern

Claims

[1] Clamping module system for a machine tool, comprising a set of several combinable clamping modules (1, 1.1,...,1.n), wherein each of the clamping modules (1, 1.1,...,1.n) has a base body (2) with a first clamping surface (3) for securing its position relative to the machine tool, and comprising a clamping arrangement arranged at least partially in the base body (2) for generating a clamping force directed against the first clamping surface (3), and wherein the clamping arrangement comprises a clamping bolt (4, 4.2) with a coupling device (15, 15.2) and a manually actuated clamping slide (7, 7.1, 7.2) which is in an angular position relative to the clamping bolt (4, 4.2), and wherein the clamping bolt (4, 4.2) and the clamping slide (7, 7.1, 7.2) have mutually interacting conical surfaces (9.1, 9.2, 9.3), and wherein the first clamping surface (3) has a perpendicular first bore (5) for introducing the clamping bolt (4, 4.2) into the base body (2), characterized by , that at least one fitting groove (10.1,...,10.6) is present on the first clamping surface (3), wherein the longitudinal axis (11) of the fitting groove (10.1,...,10.6) intersects the axial axis (6) of the first bore (5) at right angles and in the slot (10.1,..., 10.6) at least one T-nut (12.1,...,12.2) is arranged, which in the intended assembled state projects beyond the first clamping surface (3), wherein the T-nut (12.1,...,12.2) is removable and / or retractable from the first clamping surface (3) and the clamping bolt (4, 4.2) is interchangeable and axially movable in the first bore (5) in such a way as to prevent loss that the coupling device (15, 15.2) on the clamping bolt (4, 4.2) projects further towards the first clamping surface (3) than the T-nut (12.1,...,12.2) in the intended mounted state and wherein the clamping bolt (4, 4.2) is designed as an interchangeable part and the clamping module system includes different clamping bolts (4, 4.2), wherein at least one of the clamping bolts (4, 4.2) has a coupling device (15, 15.2) with undercuts for clamping on a T-slot table and at least one further clamping bolt (4, 4.2) has a coupling device (15, 15.2) for attaching a first clamping module (1, 1.1,...,1.n) to a second clamping module (1, 1.1,...,1.n), wherein the coupling device (15, 15.2) of the further clamping bolt (4, 4.2) has a second conical surface (9.2) which is designed for interaction with the conical surface (9.1, 9.2, 9.3) on the clamping slide of the second clamping module (1, 1.1,...,1.n). [2] Clamping module system according to claim 1, characterized by , that the coupling device (15, 15.2) on the clamping bolt (4, 4.2) includes a screw thread. [3] Clamping module system according to one of the preceding claims, characterized by, that the base body (2) carries a vise (16) for workpiece support and / or a second clamping surface (40) is arranged on the base body (2), wherein the second clamping surface (40) has a flat surface and / or at least one T-slot (41) and / or at least one bushing with internal thread and / or at least one second bore for receiving a clamping bolt (4, 4.2) and / or at least one locating groove (10.1,...,10.6). [4] Clamping module system according to one of the preceding claims, characterized by , that the clamping slide (7, 7.1, 7.2) is arranged completely in a thrust channel (8) within the base body (2) in the intended assembled state. [5] Clamping module system according to claim 4, characterized by , that a sealing arrangement (32) for the thrust channel (8) is present on the clamping slide (7, 7.1, 7.2). [6] Clamping module system according to one of the preceding claims, characterized by, that the clamping slide (7, 7.1, 7.2) comprises a screw section (29) and a push element (28) rotatably attached to the screw section (29) and supporting the conical surface (9.1, 9.2, 9.3), wherein the push element (28) has a non-circular cross-section. [7] Clamping module system according to claim 6, characterized by , that the shear element (28) is rotatably coupled to the screw section (29) in such a way that axially directed shear and tensile forces are transferred from the screw section (29) to the shear element (28). [8] Clamping module system according to claim 6 or 7, characterized by , that the screw section (29) has a multi-start thread (30). [9] Clamping module system according to one of claims 6-8, characterized by, that the thrust channel (8) has a first channel part with an internal thread (23) for receiving the screw section (29) and a second channel part for receiving the thrust element (28), wherein the second channel part is designed such that the thrust element (28) is guided in a rotationally rigid translational manner. [10] Clamping module system according to one of the preceding claims, characterized by , that the inner contour of the first bore (5) on the base body (2) and the outer contour of the clamping bolt (4, 4.2) are aligned so that the clamping bolt (4, 4.2) is guided in the first bore (5) in a frictionally secure manner. [11] Clamping module system according to claim 10, characterized by , that on the outer contour of the clamping bolt (4, 4.2) there is a first cylindrical guide section (24) with a first cross-sectional diameter and a second cylindrical guide section (25) with a second cross-sectional diameter which is larger than the first cross-sectional diameter. [12] Clamping module system according to one of the preceding claims, characterized by , that on the base body (2) there is a blow-out channel (44) for pressing out the clamping bolt (4, 4.2) from the first bore (5). [13] Clamping module system according to one of the preceding claims, characterized by , that an intermediate plate (47) with at least one fitting groove and at least one contact surface (48.1, 48.2) having a through-channel bore is present.

Images