Clamping arrangement for clamping a workpiece to be machined

Abstract

A clamping arrangement for clamping at least one workpiece (1) to be machined for an automated machine tool is proposed, comprising at least one guide rail (2), at least two clamping jaws (3, 3A, 4, 4A) as loose jaws and / or as fixed jaws, and at least one actuating spindle (9) with an associated spindle nut (11) for moving the at least one clamping jaw (3, 3A) designed as a loose jaw along the guide rail (2), wherein each clamping jaw (3, 3A, 4, 4A) has an upper part (5, 5A) and at least one lower part (6, 6A) attachable to the upper part (5, 5A) as a clamping element or sliding element, and wherein the lower part (6, 6A) is designed, depending on the installation position, to clamp the clamping jaw (4, 4A) to the guide rail (2) or to guide the clamping jaw (3, 3A) on the guide rail (2). Furthermore, a modular clamping system with multiple clamping arrangements is proposed.Furthermore, a machine table (21) of a machining center with at least one modular clamping system and / or with at least one clamping arrangement is proposed.

Description

[0001] The present invention relates to a clamping arrangement for clamping a workpiece to be machined for an automated machine tool, comprising at least one guide rail for the automated machine tool, at least two clamping jaws as loose jaws and / or fixed jaws, and at least one actuating spindle with an associated spindle nut for moving the at least one clamping jaw configured as a loose jaw along the guide rail. The invention further relates to a modular clamping system with multiple clamping arrangements and a machine table of a machine tool for the automated machining of workpieces.

[0002] Clamping devices for securing workpieces to be machined are generally known. In these clamping devices, one of the clamping jaws is designed as a fixed jaw and a second clamping jaw as a loose jaw, so that by moving the loose jaw via an actuating spindle, an intermediate workpiece can be clamped.

[0003] It has been shown that these known clamping arrangements are very inflexible, as a change in the design, such as switching from a loose jaw to a fixed jaw, is not easily possible. Furthermore, in these known clamping arrangements, the maximum distance between the clamping jaws is considerably limited, and the position of the fixed jaw is also fixed.

[0004] The present invention is based on the objective of proposing a clamping arrangement and a modular clamping system as well as a machine table of an automated machining center with at least one clamping arrangement and / or a modular clamping system, which enable universal and flexible clamping of workpieces.

[0005] This problem is solved according to the invention by the features of claim 1, 13, and 17, respectively. Advantageous and claimed embodiments are described in the respective dependent claims, the description, and the drawings.

[0006] The problem underlying the invention is solved by a clamping arrangement for clamping at least one workpiece to be machined for an automated machine tool, comprising at least one guide rail with at least two clamping jaws as loose jaws and / or fixed jaws, and at least one actuating spindle with an associated spindle nut for moving the at least one clamping jaw designed as a loose jaw along the guide rail. To enable universal and flexible clamping of workpieces with the clamping arrangement, each clamping jaw has an upper part and at least one lower part attachable to the upper part, serving as a clamping element or sliding element. Depending on the installation position or orientation, the lower part is designed to clamp the clamping jaw to the guide rail or to guide the clamping jaw along the guide rail.

[0007] In this way, the appropriate orientation during installation of each clamping jaw determines whether it functions as a loose or fixed jaw, and allows clamping at any position on the guide rail for workpieces of varying dimensions and shapes. Therefore, a clamping arrangement for an automated machining center is proposed that enables easy switching between loose and fixed jaws with maximum flexibility and modularity.

[0008] The proposed clamping arrangement is designed so that the lower part of the clamping jaw forms at least one clamping surface section or at least one sliding surface section on at least one guide rail, depending on the installation position. When a clamping surface section is provided, the clamping jaw becomes a fixed jaw, while when a sliding surface section is provided, the clamping jaw becomes a loose jaw, even though identical clamping jaws are used. No design modifications to the proposed clamping arrangement or its components are necessary for this. Furthermore, no additional components are required for this purpose in the proposed arrangement.

[0009] In one possible embodiment of the invention, each clamping jaw can, for example, have an upper part with two leg sections or the like, wherein the upper part is mounted centrally on the guide rail, and wherein a lower part of the clamping jaw is attached to each leg section. Accordingly, the upper part of the clamping jaw is associated with two lower parts. The clamping jaw is structurally identical regardless of whether it functions as a fixed jaw or a loose jaw.

[0010] A structurally simple way to design the clamping jaw as both a clamping body and a sliding body can be achieved by having the lower part of the clamping jaw have at least one protruding surface section or the like as a clamping surface section on a first side, for example a top side, and at least one flat surface section or the like as a sliding surface section on a second side facing away from the first side, for example a bottom side, and by having each lower part arranged section by section in an associated guide receptacle or the like of the guide rail provided centrally between the two leg sections.

[0011] In the aforementioned embodiment, depending on the installation position of the lower parts, at least one clamping surface section or at least one sliding surface section is formed in the associated guide receptacle of the guide rail, whereby the installation position of each lower part can be changed by rotating the lower part approximately 180° about a horizontal axis. In this way, simply rotating the lower parts determines whether the clamping jaw functions as a loose jaw or a fixed jaw. It is also conceivable that the aforementioned preferred, particularly simple and flexible design could be replaced by constructing the clamping surface section or the sliding surface section on the lower part in a different manner, such that, for example, a different orientation or installation position becomes necessary to change the function.

[0012] In another embodiment of the invention, for example, each clamping jaw may have an upper part with two leg sections or the like, wherein the upper part with its leg sections is each mounted on an associated guide rail, and wherein a lower part or the like is attached to the upper part between the two guide rails. Accordingly, only one lower part is associated with the upper part of the clamping jaw. The clamping jaw is structurally identical regardless of whether it functions as a fixed jaw or a loose jaw.

[0013] A structurally simple way to design the clamping jaw as both a clamping body and a sliding body can be achieved by having the upper part of the clamping jaw have a protruding section on its underside for fastening in a corresponding receiving section on a top side of the lower part of the clamping jaw, wherein the protruding section on the underside of the upper part is bounded on both sides by recessed edge sections, and wherein the receiving section on the top side of the lower part is bounded on both sides by protruding edge sections.

[0014] In the aforementioned embodiment, it is further provided that, when attached to the underside of the upper part, the lower part is arranged between two guide rails, each with laterally projecting guide sections in corresponding guide recesses of the guide rails. The projecting edge sections of the lower part and the recessed edge sections of the upper part form a corresponding surface contour or the like, so that, depending on the installation position of the lower part when attached to the upper part, at least one clamping surface section or at least one sliding surface section is formed on the guide rails. The design of the corresponding surface contour changes the distance between the upper and lower parts of the clamping jaw accordingly, depending on the installation position of the lower part, so that the upper part, together with the lower part, functions either as a clamping element or as a sliding element.By using two parallel guide rails, the lower part is positioned and guided centrally between them in guide recesses.

[0015] To determine whether a clamping jaw is designed as a loose jaw or a fixed jaw in this design variant, the installation position of the lower part can be changed by rotating it approximately 180° around a vertical axis. The aforementioned preferred design, which is particularly simple and flexible in its construction, can also be replaced by other design solutions to change the installation position and thus the function of the clamping jaw.

[0016] Regardless of the specific design variant of the clamping arrangement, a structurally simple and flexible actuation method for the clamping jaw, enabling movement along the guide rail, is achieved by providing each clamping jaw with a through-hole for the actuating spindle. Each end of this through-hole is equipped with a positive-locking receptacle for the spindle nut, ensuring a rotationally fixed connection. This allows for interchangeability depending on whether the clamping jaw functions as a loose or fixed jaw. If a clamping jaw is designed as a loose jaw, the spindle nut is rotationally locked in the positive-locking receptacle of the clamping jaw, allowing the clamping jaw to be adjusted along the guide rail by rotating the actuating spindle. This design achieves maximum flexibility and modularity in the proposed clamping arrangement.

[0017] To ensure precise positioning of the workpiece clamped by the clamping arrangement with respect to machining by an automated machine tool, the proposed clamping arrangement can be provided with each guide rail having a detent section extending in the displacement direction of the clamping jaws. A positioning element engages positively with its underside into the facing detent section and is positively engaged with its upper side into a receiving area of ​​the upper part of the clamping jaw. In this way, the exact position of the clamping jaws and the workpiece clamped by the jaws can be determined particularly easily.

[0018] The proposed clamping arrangement also readily allows for the implementation of so-called multiple clamps, in which, for example, several workpieces to be machined can be clamped side by side along a guide rail. For this purpose, the proposed clamping arrangement can, for instance, provide that one clamping jaw is arranged as a fixed jaw and two clamping jaws as loose jaws on at least one guide rail, with the fixed jaw positioned between the two loose jaws on the guide rail, so that a workpiece to be machined can be clamped between the centrally arranged fixed jaw and the loose jaws on either side.

[0019] The problem underlying the invention is also solved by a modular clamping system with several previously described clamping arrangements, resulting in the advantages already described and further advantages.

[0020] Preferably, several clamping arrangements can be positioned relative to each other in such a way that a workpiece to be machined can be clamped using all of them together. The modular clamping system makes it possible to clamp workpieces with universal shapes and dimensions.

[0021] The problem underlying the invention is also solved by a machine table, a processing machine for the automated machining of workpieces, with at least one modular clamping system as described above and / or with at least one clamping arrangement as described above. This results in the advantages already described and further advantages.

[0022] The invention will be further explained below with reference to the drawings.

[0023] They show: Figure 1 shows an exploded view of a first embodiment of a clamping arrangement according to the invention for clamping a workpiece; Figure 2 shows a partial view of the clamping arrangement according toFigure 1 Figures 3 to 3b show several views of a clamping jaw designed as a fixed jaw of the clamping arrangement according to Figure 1 Figures 4 to 4b show several views of a clamping jaw designed as a loose jaw of the clamping arrangement according to Figure 1 Figure 5 shows an exploded view of a second embodiment of the clamping arrangement; Figure 6 shows a three-dimensional partial view of the clamping arrangement according to Figure 5 Figures 7 to 7B show several views of a clamping jaw designed as a fixed jaw of the clamping arrangement according to Figure 5 Figures 8 to 8B show several views of a clamping jaw designed as a loose jaw of the clamping arrangement according to Figure 5 Figure 9 shows a side view of the clamping arrangement according to Figure 5 Figure 10 shows a sectional view along section line CC according to Figure 9 the clamping jaw designed as a fixed jaw; Figure 10A an enlarged detail according to Figure 10 Figure 11 shows a sectional view along the section line DD according to Figure 9the clamping jaw designed as a loose jaw; Figure 11A an enlarged detail according to Figure 11 Figure 12: A three-dimensional view of a clamping arrangement as a multiple clamp; Figure 13: A top view of a modular clamping system according to the invention with three clamping arrangements for clamping a plate-shaped workpiece; Figure 13A: An enlarged detail according to Figure 13 Figure 13: Legs, further top view of the modular clamping system according to Fig. 13 Figure 14: A top view of an alternative embodiment of the modular clamping system for clamping a circular workpiece; Figure 14A: An enlarged detail according to Figure 14 ; and Figure 15 a three-dimensional view of a machine table of an automated machining center (not shown) with a clamping arrangement designed as a multiple clamp.

[0024] In the Figures 1 to 15Various views and embodiments of a clamping arrangement and a modular clamping system according to the invention, as well as a machine table 21 of a machine tool with a clamping arrangement, are shown by way of example.

[0025] In the Figures 1 to 4B An exemplary first embodiment of a clamping arrangement according to the invention for clamping a workpiece 1 to be machined is shown. The clamping arrangement comprises a centrally arranged guide rail 2 with a first clamping jaw 3 as a loose jaw and a second clamping jaw 4 as a fixed jaw. The clamping jaws 3 and 4 are structurally identical. The clamping jaws 3 and 4 have an upper part 5 and two associated lower parts 6. The upper part 5 has two leg sections 7, to each of which a lower part 6 is attached by screws.

[0026] The upper part 5 has a through-hole 8 for an actuating spindle 9, with a positive-locking receptacle 10 for a spindle nut 11 being provided at each end of the through-hole 8 for rotationally fixed connection to the upper part 5. In the case of the clamping jaw 3, which is designed as a loose jaw, the spindle nut 11 is rotationally fixedly received in the receptacle 10 in the upper part 5, so that the clamping jaw 3 is moved along the guide rail 2 to clamp the workpiece 1 by rotating the actuating spindle.

[0027] Since the clamping jaws 3 and 4 are structurally identical, the installation position of the lower parts 6 determines whether a clamping surface section 12 or a sliding surface section 13 is formed on the guide rail 2. When clamping jaw 3 is a loose jaw, sliding surface sections 13 are formed by the lower parts 6, while when clamping jaw 4 is a fixed jaw, clamping surface sections 12 are formed by the lower parts 6.

[0028] The views according to Figures 3 to 3B The installation position and fastening of the lower parts 6 to the upper part 5 are shown using the clamping jaw 4 as a fixed jaw, while the views according to Figures 4 to 4B The installation position and the fastening of the lower parts 6 to the upper part 5 are shown using the clamping jaw 3 as a loose jaw.

[0029] In the clamping jaw 4, which is a fixed jaw, the lower parts 6 are aligned and attached to the upper part 5 such that the lower parts 6 have protruding surface sections 12, which act as clamping surface sections 12. The attached lower parts 6 of the clamping jaw 4 are attached to the leg sections 7, so that the lower parts 6, with their protruding clamping surface sections 12, are each clamped in a corresponding guide receptacle 14 of the guide rail 2 located centrally between the two leg sections 7. By attaching the lower parts 6 to the upper part 5, the clamping jaw 4 is clamped to the guide rail 2. As can be seen in particular from... Figure 3B As can be seen, the installation position of the lower parts 6 can be changed by turning the lower parts 6 about 180° around a horizontal axis 19.

[0030] The installation position of the lower parts 6 as sliding bodies is determined by the Figures 4 to 4BAs shown, in this installation position after turning the underside 6, the previously provided flat surface section on the underside now faces the associated leg section 7 as a sliding surface section 13, so that the attached lower parts 6 function as sliding elements. Thus, after the lower parts 6 are attached to the upper part 5, the clamping jaw 3 is mounted as a loose jaw sliding on the guide rail 2.

[0031] To precisely position the clamping jaws 3, 4 and the workpiece 1 clamped between them, the first embodiment of the clamping arrangement provides a detent section 15 with a plurality of detents along the top surface of the centrally arranged guide rail 2. Furthermore, a positioning element 16 is provided, which is positively engaged with the detents of the detent section 15 on one side and positively engaged with a spring element in a receiving area of ​​the upper part 5 of the clamping jaw on the other. Consequently, a predetermined position of the clamping jaws 3, 4 can be set based on the detents, as is the case, for example, in Figure 2 as indicated.

[0032] In the Figures 7 to 11AA second embodiment of the clamping arrangement according to the invention for clamping the workpiece 1 to be machined is shown by way of example. The clamping arrangement comprises two parallel guide rails 2 arranged side by side, to which a first clamping jaw 3A (loose jaw) and a second clamping jaw 4A (fixed jaw) are assigned. The clamping jaws 3A and 4A are structurally identical. The clamping jaws 3A and 4A have an upper part 5A and an associated lower part 6A. The upper part 5A has two leg sections 7A, by which the upper part 5A is mounted on the associated guide rails 2. Each leg section 7A is assigned a positioning element 16A, which engages positively in detents of a detent section 15A running along the upper side of each guide rail 2. In this way, precise positioning of each clamping jaw 3A and 4A on the associated guide rails 2 is possible.The positioning element 16A is held in a form-locking manner in a receiving area of ​​the associated leg section 7A by means of a spring element, as can be seen by way of a clamping jaw 3A, 4A in . Figure 6 as indicated.

[0033] In the second embodiment of the clamping arrangement, the upper part 5A has on its underside a projecting section 26 for fastening in a corresponding receiving section 27 on a top side of the lower part 6A arranged centrally between the two guide rails 2, wherein the projecting section 26 on the underside of the upper part 5A is bounded on both sides by recessed edge sections 17 and wherein the receiving section 27 on the top side of the lower part 6A is also bounded on both sides by projecting edge sections 18.The projecting edge sections 18 of the lower part 6A and the recessed edge sections 17 of the upper part 5A form a corresponding surface contour, so that when attached to the upper part 5A, depending on the installation position of the lower part 6A, clamping surface sections 12A or sliding surface sections 13A are formed on the guide rail 2 when the lower part 6A is attached to the upper part 5A of each clamping jaw 3A, 4A, as is shown for example in the . Figures 7A, 8A and Figures 10 to 11A as is evident.

[0034] The corresponding surface contour between the projecting edge sections 18 on the lower part 6A and the recessed edge sections 17 on the upper part 5A is particularly evident from the sectional views of the Figures 7A and 8A clarifies which one is marked by a box.

[0035] In Figure 7AThe lower part 6A, attached to the upper part 5A, is in an installation position in which the surface contour is designed such that the edge sections 17 and 18 interlock positively, so that the lower part 6A acts as a clamping element and the clamping jaw 4A is designed as a fixed jaw. The positively interlocking edge sections 17 and 18 allow the lower part to be clamped to the upper part 5A in such a way that clamping surface sections 12 are formed between the guide rails 2 and the upper part 5A, or between the lower part 6A and the guide rails 2, as shown in the Figures 10 and 10A This is indicated. Therefore, in this installation position of the lower part 6A, the clamping jaw 4A is designed as a fixed jaw.

[0036] If the lower part 6A is rotated approximately 180° about a vertical axis 20 and is in this installation position, which is in the Figures 8 to 8BAs indicated, to which the upper part 5A is attached, a surface contour results between the edge sections 17 and 18, in which the edge sections 17, 18 lie planarly or flatly on top of each other, as shown in Figure 8A as shown. In this installation position, a gap exists between the upper part 5A and the lower part 6A at the associated guide rails 2 when fastened. Due to the gap, sliding surface sections 13A are formed between the upper part 5A and the guide rails 2, as well as between the lower part 6A and the guide rails 2, as shown, for example, in the Figures 11 and 11A as shown. Accordingly, in this installation position of the lower part 6A, the clamping jaw 3A is designed as an adjustable loose jaw.

[0037] In Figure 12A multiple clamping device is shown based on the first embodiment of the clamping arrangement, in which a clamping jaw 4 is arranged as a fixed jaw and two clamping jaws 3 as loose jaws are arranged on the guide rail 2, wherein the fixed jaw 4 is arranged between the two loose jaws 3 on the guide rail 2, so that the workpiece 1 to be machined can be clamped between the centrally arranged fixed jaw 4 and the loose jaws 3 assigned on both sides.

[0038] In the Figures 13 to 14A Various versions of a modular clamping system with multiple clamping arrangements are shown, in which the clamping arrangements are arranged in such a way that a workpiece 1 to be machined can be clamped together with the clamping arrangements.

[0039] In the Figures 13, 13A, 13BThree clamping arrangements of the modular clamping system are provided, with two clamping arrangements arranged parallel to one another and a third clamping arrangement running transversely to them, so that a plate-shaped workpiece 1 can be clamped with the modular clamping system. Each of the clamping arrangements comprises a first sub-arrangement with a first guide rail 2 and a first clamping jaw 3 arranged thereon, and a second sub-arrangement with a second guide rail 2 and a second clamping jaw 4 arranged thereon, wherein the opposing first and second sub-arrangements are coupled to each other via a common actuating spindle 9. As can be seen in particular from the detailed view according to Figure 13AAs a result, connecting pieces 22 with through-holes are used for the intersecting actuating spindles 9 in order to use the respective actuating spindle 9 with the associated sub-assemblies. In this design, it is also readily possible for a clamping jaw 3, 4 to function as a loose jaw or as a fixed jaw.

[0040] In Figures 14 and 14AAn alternative embodiment of the modular clamping system is shown, in which the clamping arrangements comprise at least a first sub-arrangement with a first guide rail 2 and a first clamping jaw 4 arranged thereon as a fixed jaw with an associated actuating spindle 9, and at least a second sub-arrangement with a second guide rail 2 and a second clamping jaw 4 arranged thereon as a fixed jaw with an associated actuating spindle 9, and at least a third sub-arrangement with a third guide rail 2 and a third clamping jaw 3 arranged thereon as a loose jaw with an associated actuating spindle 9, wherein the sub-arrangements are arranged at a predetermined angle to each other with respect to their guide rails 2.For example, two of the sub-assemblies have fixed jaws and one of the sub-assemblies has a loose jaw, the loose jaw being movable for clamping a workpiece 1 by turning the spindle nut 11 on the associated rotationally fixed actuating spindle 9. The actuating spindles 9 of the clamping jaws 3, 4 are each mounted at their free end in a spindle fixing 25. The three guide rails 2 with the associated clamping jaws 3, 4 are aligned with each other such that a circular workpiece 1 can be clamped with the three clamping jaws 3, 4. In this embodiment as well, it is readily possible for a clamping jaw 3, 4 to function as either a loose or a fixed jaw.

[0041] In Figure 15Figure 1 shows a machine table 21 of a machining center (not shown) for the automated machining of workpieces 1. An adapter plate 23 is arranged on the machine or work table 21, on which, for example, the workpiece is preferably mounted via so-called zero-point clamping systems 24. Figure 12 The multi-clamp shown is attached. Thus, the workpieces 1 clamped with the multi-clamp are positioned in a predetermined position on the machine table 21 of the machining center, enabling automated machining. Other versions of the clamping arrangement or the modular clamping system can also be attached to the machine table 21 of the automated machining center at a predetermined position via the zero-point clamping systems 24. Reference sign

[0042] 1 Workpiece to be machined 2 Guide rail 3,3A Clamping jaw as adjustable loose jaw 4,4A Clamping jaw as fixed jaw 5,5A Upper part of the clamping jaw 6,6A Lower part of the clamping jaw 7,7A Leg sections 8 Through hole 9 Actuating spindle 10 Positive locking receptacle for the spindle nut 11 Spindle nut 12, 12A Clamping surface section 13,13A Sliding surface section 14 Guide receptacle of the guide rail 15,15A Locking section 16,16A Positioning element 17 Recessed edge sections on the upper part 18 Protruding edge sections on the lower part 19 Horizontally aligned axis 20 Vertically aligned axis 21 Machine table of a machining center 22 Connecting element 23 Adapter plate 24 Zero-point clamping system 25 Spindle fixation 26 Protruding section on the underside of the upper part 27 Recording section on the top of the lower part

Claims

1. Clamping arrangement for clamping at least one workpiece (1) to be machined for an automated machine tool, with at least one guide rail (2), with at least two clamping jaws (3, 3A, 4, 4A) as loose jaws and / or as fixed jaws and with at least one actuating spindle (9) with an associated spindle nut (11) for moving the at least one clamping jaw (3, 3A) designed as a loose jaw along the guide rail (2), characterized by the fact that Each clamping jaw (3, 3A, 4, 4A) has a top part (5, 5A) and at least one bottom part (6, 6A) attachable to the top part (5, 5A) as a clamping element or sliding element, wherein the bottom part (6, 6A) is designed, depending on the installation position, to clamp the clamping jaw (4, 4A) to the guide rail (2) or to guide the clamping jaw (3, 3A) on the guide rail (2).

2. Clamping arrangement according to claim 1, characterized by the fact thatThe lower part (6, 6A) of the clamping jaw (3, 3A, 4, 4A) forms at least one clamping surface section (12, 12A) or at least one sliding surface section (13, 13A) on at least one guide rail (2), depending on the installation position.

3. Clamping arrangement according to claim 1 or 2, characterized by the fact that Each clamping jaw (3, 4) has a top part (5) with two leg sections (7), wherein the top part (5) is mounted centrally on the guide rail (2), and wherein a bottom part (6) of the clamping jaw (3, 3A, 4, 4A) is attached to each leg section (7).

4. Clamping arrangement according to claim 3, characterized by the fact thatthe lower part (6) of the clamping jaw (3, 4) has at least one projecting surface section as a clamping surface section (12) on a first side and at least one flat surface section as a sliding surface section (13) on a second side facing away from the first side, and that each lower part (6) is arranged section by section in an associated guide receptacle (14) of the guide rail (2) provided centrally between the two leg sections (7).

5. Clamping arrangement according to claim 4, characterized by the fact that Depending on the installation position of the lower parts (6), at least one clamping surface section (12) or at least one sliding surface section (13) is formed in the associated guide receptacle (14) of the guide rail (2), wherein the installation position of each lower part (6) can be changed by turning the lower part (6) by approximately 180° about a horizontal axis (19).

6. Clamping arrangement according to claim 1 or 2, characterized by the fact thatEach clamping jaw (3A, 4A) has a top part (5A) with two leg sections (7A), wherein the top part (5A) with its leg sections (7A) is each mounted on an associated guide rail (2), and wherein a bottom part (6A) is attached to the top part (5A) between the two guide rails (2).

7. Clamping arrangement according to one of claims 6, characterized by the fact that the upper part (5A) of the clamping jaw (3A, 4A) has on its underside a projecting section (26) for attachment in a corresponding receiving section (27) on a top side of the lower part (6A) of the clamping jaw, wherein the projecting section on the underside of the upper part (5A) is bounded on both sides by recessed edge sections (17), and wherein the receiving section on the top side of the lower part (6A) is bounded on both sides by projecting edge sections (18).

8. Clamping arrangement according to claim 7, characterized by the fact thatWhen attached to the underside of the upper part (5A), the lower part (6A) is arranged between two guide rails (2) with laterally projecting guide sections in associated guide receptacles (14) of the guide rails (2), wherein the projecting edge sections (18) of the lower part (6A) and the recessed edge sections (17) of the upper part (5A) form a corresponding surface contour, so that when attached to the upper part (5A) depending on the installation position of the lower part (6A) at least one clamping surface section (12) or at least one sliding surface section (13) is formed on the guide rails (2).

9. Clamping arrangement according to claim 8, characterized by the fact that The installation position of the lower part (6A) can be changed by rotating the lower part (6A) by approximately 180° about a vertical axis (20).

10. Clamping arrangement according to one of the preceding claims, characterized by the fact thatEach clamping jaw (3, 3A, 4, 4A) has a through-hole (8) for the actuating spindle (9), wherein each end of the through-hole (8) is assigned a positive-locking receptacle (10) for the spindle nut (11) for rotationally fixed connection.

11. Clamping arrangement according to one of the preceding claims, characterized by the fact that Each guide rail (2) has a detent section (15, 15A) extending in the displacement direction of the clamping jaws (3, 3A, 4, 4A) with detents, wherein a positioning element (16, 16A) engages with a bottom side in a form-fitting manner in the facing detent section (15, 15A) and is received with a top side in a form-fitting manner in a receiving area of ​​the upper part (5, 5A) of the clamping jaw (3, 3A, 4, 4A).

12. Clamping arrangement according to one of the preceding claims, characterized by the fact thaton which at least one guide rail (2) a clamping jaw (4, 4A) as a fixed jaw and two clamping jaws (3, 3A) as loose jaws are arranged, wherein the fixed jaw is arranged between the two loose jaws on the guide rail (2), so that a workpiece (1) to be machined can be clamped between the centrally arranged fixed jaw and the loose jaws assigned on both sides.

13. Modular clamping system with multiple clamping arrangements according to one of the preceding claims.

14. Modular clamping system according to claim 13, characterized by the fact that Several clamping arrangements are arranged in such a way that a workpiece (1) to be machined can be clamped together with the clamping arrangements.

15. Modular clamping system according to claim 12 or 13, characterized by the fact thatat least one first sub-arrangement with a first guide rail (2) and a first clamping jaw (3, 3A, 4, 4A) arranged thereon and at least one second sub-arrangement with a second guide rail (2) and a second clamping jaw (3, 3A, 4, 4A) arranged thereon are provided, wherein the opposing first and second sub-arrangements are coupled to each other via at least one actuating spindle (9).

16. Modular clamping system according to claim 13 or 14, characterized by the fact thatat least one first sub-arrangement with a first guide rail (2) and a first clamping jaw (3, 3A, 4, 4A) arranged thereon with an associated actuating spindle (9), and at least one second sub-arrangement with a second guide rail (2) and a second clamping jaw (3, 3A, 4, 4A) arranged thereon with an associated actuating spindle (9), and at least one third sub-arrangement with a third guide rail (2) and a third clamping jaw (3, 3A, 4, 4A) arranged thereon with an associated actuating spindle (9), wherein the sub-arrangements are arranged at a predetermined angle to each other with respect to their guide rails (2), and wherein the associated actuating spindles (9) are held rotationally fixed in a common spindle fixing (25), and wherein at least one clamping jaw (3,3A) as a loose jaw, movable by actuating the spindle nut (11) on the associated actuating spindle (9).

17. Machine table (21) of a machining machine for the automated machining of workpieces (1) with at least one modular clamping system according to one of claims 13 to 16 and / or with at least one clamping arrangement according to one of claims 1 to 12.

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