Clamping device and method for producing a profile insert for a clamping device

Abstract

The invention relates to a clamping device for a profile-processing center, comprising a base and a profile insert which is adapted to a profile to be fixed by means of the clamping device, wherein, in the clamped state, the profile rests against the profile insert, and the profile insert consists of a plurality of separate pieces.

Description

[0001] Clamping device and method for manufacturing a profile insert for a clamping device

[0002] The invention relates to a clamping device for a profile machining center, comprising a base and a profile insert adapted to a profile to be fixed by means of the clamping device. The invention also relates to a method for manufacturing a profile insert for a clamping device.

[0003] Profiles, especially plastic or aluminum profiles, are used for a wide variety of applications. To machine the profiles for their intended use, they must be clamped securely in a profile machining center to enable high-precision machining. Clamping a wide variety of profiles can be challenging. For example, it is essential to prevent the profile from shifting or tilting during clamping.

[0004] The invention aims to improve a clamping device and a method for manufacturing a profile insert for a clamping device.

[0005] According to the invention, a clamping device with the features of claim 1 and a method for manufacturing a profile insert for a clamping device with the features of claim 12 or 13 are provided. Advantageous embodiments of the invention are described in the respective dependent claims.

[0006] A clamping device for a profile machining center has a base and a profile insert which is adapted to a profile to be fixed by means of the clamping device, wherein the profile rests against the profile insert in the clamped state and wherein the profile insert consists of several separate parts.

[0007] Because the profile insert consists of several separate sections, it can be easily adapted to the profile being clamped. In particular, it is no longer necessary, as was previously the case, to manufacture a profile insert for a specific profile. The clamping device according to the invention can therefore be used in an extremely flexible manner.

[0008] In a further development of the invention, the components comprise at least one base part and at least one clamping part, wherein the base part is designed for attachment to the base and the clamping part is designed for attachment to the base part. In this way, a high degree of variability for different profiles can be achieved. The base part can generally be selected as the same for most profiles, and only the clamping part needs to be adapted. Consequently, far less material is required than is conventionally used for profile inserts for different profiles. The clamping parts can be manufactured, for example, by 3D printing, milling, or similar methods. The clamping parts can have a negative contour corresponding to the profile to be clamped; generally speaking, the clamping parts are adapted to the profile to be clamped.

[0009] In a further development of the invention, at least one base part and at least one clamping part can be connected to each other by means of a plug connection.

[0010] In a further development of the invention, at least one first clamping element is provided with magnetizable or magnetic elements on its side facing away from the base element in the assembled state, so that further clamping elements can be placed on the first clamping element and magnetically fixed.

[0011] In this way, it is possible to attach several clamping elements and thus adapt a profile insert to a profile to be clamped in a very simple way.

[0012] In a further development of the invention, the sections of the profile insert have at least one guide part and several clamping parts that are movable in the guide part, wherein the clamping parts are all movable relative to the guide part exclusively in and against the same direction and parallel to each other.

[0013] This provides a package of several superimposed, strip-shaped clamping elements or clamping tongues, whereby the clamping elements or clamping tongues can be moved parallel to each other and parallel to the clamping direction and fixed in the moved position. This allows for extremely flexible adaptation to a wide variety of profiles. A significant advantage of the clamping device according to the invention is that a new profile insert does not need to be manufactured for each profile to be clamped; instead, the clamping elements or clamping tongues can be moved very easily within the guide element to conform to the contour of the profile to be clamped. In this moved state, in contact with the profile to be clamped, the clamping elements or clamping tongues are then fixed to securely clamp the profile.

[0014] In a further development of the invention, all clamping elements are designed in a plate-like form and constitute a stack of clamping elements arranged in the guide element. In a further development of the invention, all clamping elements have the same material thickness.

[0015] In a further development of the invention, a contour key is provided, wherein the clamping elements which are movable in the guide part bear their rear side, which faces away from the profile to be fixed, against the contour key, which in turn is supported on the guide part.

[0016] Using a contour key, the clamping elements can be easily positioned in a predefined manner, suitable for clamping a specific profile. This allows for secure clamping of the profile, and, with the appropriate contour key, the clamping device can be quickly and easily converted to different profiles. Furthermore, providing a contour key ensures that the clamping element position, adapted to a specific profile, is repeatable. This largely eliminates human error during profile clamping, enabling the reliable processing of even profiles with highly complex external contours.

[0017] In a further development of the invention, the contour key is manufactured using 3D printing or a CNC machine.

[0018] Typically, CAD data is available for a profile to be clamped. This allows a designer to easily create a 3D or 2D model of a suitable contour key and then transfer this digital model to either a 3D printer or a CNC machine, such as a CNC milling machine. Even a wide variety of profiles with complex external contours can thus be clamped quickly and reliably.

[0019] In a further development of the invention, a fixing device is provided for fixing the clamping parts in the guide part.

[0020] In a further development of the invention, the guide part has a frame with a base, wherein the clamping elements which are movable in the guide part are movable parallel to the base, and wherein the fixing device for clamping and thereby fixing the movable clamping elements to the base is provided and set up.

[0021] The problem underlying the invention is also solved by a method for manufacturing a profile insert for a clamping device comprising the following steps: creating a digital 3D model of at least one section and manufacturing the section using a CNC machine or a 3D printer. The problem underlying the invention is also solved by a method for manufacturing a profile insert for a clamping device in which the creation of a contour key based on a cross-section of a profile to be clamped and the alignment of the clamping elements, which are movable in the guide part, are provided so that their rear sides, facing away from the profile to be clamped, bear against the contour key.

[0022] In a further development of the invention, the creation of a digital model of the contour key and the production of the contour key using a CNC machine or a 3D printer are provided.

[0023] Further features and advantages of the invention will become apparent from the claims and the following description of preferred embodiments of the invention in conjunction with the drawings. Individual features of the different embodiments shown and / or described can be combined with one another in any way without exceeding the scope of the invention. This also applies to the combination of individual features without other individual features with which they are shown and / or described. The drawings show:

[0024] Fig. 1 a schematic side view of a clamping device according to a first

[0025] embodiment of the invention for a profile machining center,

[0026] Fig. 2 shows a section-by-section view of the clamping device of Fig. 1 in a

[0027] State for clamping a first profile,

[0028] Fig. 3 shows a section-by-section representation of the clamping device of Fig. 1 in a state for clamping a second profile,

[0029] Fig. 4 shows a section-by-section view of the clamping device of Fig. 1 in a

[0030] State for tensioning a third profile,

[0031] Fig. 5 shows a section-by-section view of the clamping device of Fig. 1 in a

[0032] State for tensioning a fourth profile,

[0033] Fig. 6 shows a top view of a base part of the clamping device of Fig. 1, from above.

[0034] Fig. 7 shows the base part of Fig. 6 in a front view, Fig. 8 shows a clamping part for the clamping device of Figs. 1 to 5 for mounting on the base part of Fig. 6,

[0035] Fig. 9 shows a front view of the clamping part of Fig. 8,

[0036] Fig. 10 shows a base part at the rear bottom of the clamping device of Figs. 1 to 5 in a top view.

[0037] Fig. 11 shows a front view of the base part of Fig. 10,

[0038] Fig. 12 is a top view of the clamping element at the rear bottom of the clamping device of Fig. 1 to

[0039] 5,

[0040] Fig. 13 shows a front view of the clamping part of Fig. 12,

[0041] Fig. 14 is a top view of a base part at the front top of the clamping device of Figs. 1 to 10.

[0042] 5,

[0043] Fig. 15 shows a front view of the base part of Fig. 14,

[0044] Fig. 16 is a top view of a base part at the front bottom of the clamping device of Fig. 1 to

[0045] 5 in a front view,

[0046] Fig. 17 shows a top view of the base part of Fig. 16,

[0047] Fig. 18 shows a front view of a clamping element at the front bottom of the clamping device of Figs. 1 to 5.

[0048] Fig. 19 shows a top view of the clamping element of Fig. 18.

[0049] Fig. 20 shows a side view of the clamping part of Fig. 19.

[0050] Fig. 21 shows the base part of Figs. 14 and 15 with a clamping element mounted on it according to Fig. 8 in a top view,

[0051] Fig. 22 shows a schematic, partially cut-away side view of a clamping device according to a second embodiment of the invention, Fig. 23 shows different views of a blank for a contour wrench of the clamping device of Fig. 22.

[0052] Fig. 24 shows a front view of a housing of the clamping device of Fig. 22.

[0053] Fig. 25 shows a side view of the housing of Fig. 24.

[0054] Fig. 26 shows a top view of the housing of the clamping device of Fig. 22.

[0055] Fig. 27 shows a top view of a base of the housing of the clamping device of Fig. 22 and

[0056] Fig. 28 shows a top view of one of the clamping parts of the clamping device of Fig. 22.

[0057] Fig. 1 shows a clamping device 10 according to a first embodiment of the invention in a section view. The clamping device 10 has two clamping jaws 12, 14, wherein clamping jaw 14 forms part of a machine bed 16 of a profile machining center and clamping jaw 12 is slidable on the machine bed 16. For this purpose, a clamping drive (not shown) is provided, which moves the clamping jaw 12 on a horizontally arranged guide 18 of the machine bed 16. A profile to be machined is clamped by means of the clamping jaws 12, 14 such that the longitudinal direction of the profile in Fig. 1 extends into the plane of the drawing and is thus parallel to the longitudinal direction of the machine bed 16.

[0058] Each of the clamping jaws 12, 14 has a base 20, 22, wherein the base 22 of clamping jaw 14 forms part of the machine bed 16 and the base 20 of clamping jaw 12 forms part of the sliding carriage, which can be moved relative to the machine bed 16. In the illustration of Fig. 1, two base parts 22, 24 and 24, 26 are arranged on the respective base 20, 22.

[0059] The base part 24 is arranged on the base 20 of the clamping jaw 12 and is also referred to as the front bottom support. The base part 24 is designed to provide downward support for a profile to be fixed, possibly with the insertion of another clamping part.

[0060] The base part 26 is also attached to the base 20 of the clamping jaw 12 and is also referred to as the front upper support. The base part 26 is designed, optionally with the insertion of another clamping element, to provide lateral support for a profile to be clamped. The base part 26 exerts a clamping force on the profile to be fixed, either directly or indirectly, when the clamping jaw 12 is moved, in Fig. 1 to the left towards the second clamping jaw 14.

[0061] The base part 28 is arranged at the base 22 of the clamping jaw 14 and is also referred to as the rear bottom support. The base part 28 supports a profile to be fixed downwards, optionally with the insertion of another clamping part.

[0062] The base part 30 is also attached to the base 22 of the clamping jaw 14 and is also referred to as the rear upper support. The base part 30 provides a lateral left support for a profile to be fixed, optionally with the insertion of another clamping element, and forms a counter bearing for the horizontally directed clamping forces applied by the clamping jaw 12 on the right in Fig. 1.

[0063] The clamping device 10 of Fig. 1 can be used in the state shown in Fig. 1, for example, when simple profiles with a square or rectangular cross-section are to be fixed and machined. However, each of the basic parts 24, 26, 28 and 30 is designed to be fitted with additional clamping elements in order to adapt to the specific shape of a profile to be machined.

[0064] Figures 2 to 5 show examples of how special profiles to be fixed can be fixed in an extremely flexible manner using the clamping device 10 according to the invention.

[0065] Fig. 2 shows the clamping device 10 of Fig. 1 in a section view, with a very flat, strip-shaped profile 32 clamped in the clamping device 10. A clamping element 34 has been slid onto the base part 26, which mainly serves to support the plate-shaped profile 32 downwards. The clamping element 34 rests with its underside on the base part 24.

[0066] A clamping element 36 has been slid onto the base part 30 on the left in Fig. 2, which also mainly serves to provide downward support for the profile 32.

[0067] The clamping element 36 is the same height as the clamping element 34, and the underside of the profile 32 is shown at a distance from the top side of the clamping elements 34, 36 only to improve the clarity of the illustration. As is immediately apparent to anyone skilled in the art, the profile 32 could also be placed on the base parts 24, 28. This would also provide support for the profile 32. However, the profile 32 would then be positioned significantly below the top sides of the base parts 26, 28, thus restricting access to the profile 32 for machining operations. It can also be seen in Fig. 2 that the distance between the two lower base parts 24, 28, in the state where the two lateral base parts 26, 30 are already in contact with the profile 32, is significantly greater than the gap between the two clamping elements 34, 36.By means of the clamping elements 34, 36, the profile 32 can therefore be supported on its underside over a larger area than would be the case with the lower base elements 24, 28.

[0068] Fig. 3 shows the clamping device 10 of Fig. 1 in a state in which the clamping jaws 12, 14 are prepared for clamping a profile 42 with a very small cross-section.

[0069] The profile 42 rests on the clamping element 36, which in turn is attached to the lateral base 30 of the clamping jaw on the left in Fig. 3. A clamping element 38, which is only about half as high as the base 26, is attached to the lateral base 26 of the clamping jaw 12 on the right in Fig. 3. When the clamping jaw 12 is moved towards the clamping jaw 14, the clamping element 38 can be moved above the top surface of the clamping element 36 until a surface of the clamping element 38 on the left in Fig. 3 abuts the profile 42, thereby clamping the profile 42 between the clamping element 38 and the lateral base 30.

[0070] The profile 42 rests securely on the clamping element 36.

[0071] Fig. 4 shows the clamping device 10 in a state for fixing a profile 52 with a cross-section that is very difficult to clamp. The profile 52 has a rectangular base body, with a rib-like cross-section extending to the right from the upper right corner of the cross-section in Fig. 4 and a rib-like projection also extending to the left from the lower left corner in Fig. 4.

[0072] To reliably fix this profile 52, its underside rests on the base part 28 (left in Fig. 4) and the base part 24 (right in Fig. 4). A clamping element 44 is attached to the side base part 26 such that it lies below the right-hand rib-shaped projection of the profile 52. The clamping element 44 is thus lower than the rib-shaped projection on the profile 52. When the clamping jaw 12 (right in Fig. 4) is moved towards the profile 52, the left side of the clamping element 44 (left in Fig. 4) first comes into contact with the rectangular base body of the profile 52 before the rib-shaped projection abuts the base part 26. Another clamping element 46, which has the same dimensions as the clamping element 44, is arranged on the side base part 30 of the clamping jaw 14 (left in Fig. 4). The clamping element 46 has a greater width than the strip-like projection at the lower left end of the profile 52.When the clamping jaw 12 is moved towards the clamping jaw 14, the rectangular base body of the profile 52 is clamped between the clamping parts 44 and 46 and thus securely fixed.

[0073] Fig. 5 shows the clamping device 10 of Fig. 1 in a state in which an oval or circular profile 62 can be fixed. In the state shown in Fig. 5, the profile 62 rests on the lower base part 24 and against the side base part 26 in the area of ​​the right clamping jaw 12. The left clamping jaw 14, or the side support part 30, is provided with a clamping element 48 that has a V-shaped groove on the side facing the clamping jaw 12. The V-shaped groove is adapted to the diameter of the profile 62. When the clamping jaw 12 is moved towards the clamping jaw 14, the profile 62 is inserted into the V-shaped groove of the clamping element 48 and securely fixed there by means of the preload force of the clamping jaw 12.

[0074] Fig. 6 shows a top view of the base part 30 of the clamping device 10 of Fig. 1. It can be seen that the base part 30 has a generally rectangular cross-section and has a groove with a rectangular cross-section 54A, 54B on each of its opposite narrow sides. These grooves 54A, 54B are designed for the insertion of the projections 56A and 56B of a clamping element 58, which is shown in a top view in Fig. 8.

[0075] The clamping element 58 can therefore be attached to the base element 30 in a very simple manner.

[0076] The base part 30 has a rectangular strip 60 on its side shown below in Fig. 6, which engages in a flat, rectangular groove 64 on the clamping part 58 when the clamping part 58 is pushed onto it. The strip 60 can be designed as a spring strip to hold the clamping part 58 against the base part 30 without play.

[0077] Fig. 7 shows a front view of the base part 30 and Fig. 8 shows a top view of the clamping part 58, Fig. 9 shows a front view of the clamping part 58.

[0078] In Figures 8 and 9, dashed lines indicate that the clamping element 58 may have different dimensions than those shown with solid lines. Figure 10 shows a top view of the base part 28 or the rear bottom support of Figure 1. Figure 11 shows a front view of the base part 28, in which a rib-shaped projection on the top surface of the base part 28 can be seen.

[0079] Fig. 12 shows a top view of a clamping element 64.

[0080] Fig. 13 shows the clamping element 64 in a front view, which can be placed on the base part 28. In the placed state, the projection on the base part 28 engages in the corresponding groove on the underside of the clamping element 64 to fix the clamping element 64 to the base part 28.

[0081] Fig. 14 shows a top view of the base part 26 of Fig. 1, or the front top attachment. The base part 26 has the same outer contour as the base part 30 of Fig. 6, which has already been explained. The rectangular strip 60, which is shown on the base part 30 in Fig. 6, can also be provided on the base part 26. Fig. 15 shows a front view of the base part 26.

[0082] Fig. 16 shows a front view of the base part 24 of Fig. 1, or the front bottom support. Fig. 17 shows a top view of the base part 24. It can be seen that a front face, which in Fig. 1 faces the clamping jaw 14, of the base part 24 is provided with a dovetail-shaped projection 68 in cross-section. This dovetail-shaped projection 68 is designed to be inserted into a dovetail-shaped groove 70 of a clamping element 74, which is placed on the base part 24.

[0083] Figures 18, 19 and 20 show different views of the clamping part 74.

[0084] Fig. 21 shows the base part 30 or the rear top assembly of Fig. 1 with the clamping part 58 pushed onto it, cf. Figs. 8 and 9. The clamping part 58 can have an anti-slip surface, for example an anti-slip rubber, on its front side, which is at the bottom in Fig. 21.

[0085] The grooves 54A, 54B and the projections 56A, 56B, see Figs. 6 and 8, which interlock, are dimensioned such that a rear side of the clamping element 58 abuts a front side of the base element 30. In Fig. 21, a gap between the front side of the base element 30 and the rear side of the clamping element 58 is shown only for clarity. Alternatively or additionally, as illustrated in Figs. 6 and 8, a spring strip 6 can be provided on the base element and a groove 64 on the clamping element 58. Fig. 22 shows a schematic, partially cut-away side view of a clamping device 10 according to a further embodiment of the invention. The clamping device 100 is shown only partially in Fig. 22, and in particular, only a profile insert 102 is shown, which would be mounted on the right-hand base 20 in Fig. 1.The profile insert 102 would then be mounted on the base 20 in place of the base parts 24, 26, in order to form the clamping jaw 12 on the right in Fig. 1.

[0086] Another identical profile insert 102 can also be attached to the base 22 on the left in Fig. 1 to then form the clamping jaw 14.

[0087] Fig. 22 shows a profile 102 with a comparatively complex outer contour. The profile 102 has a rectangular base body 104, from whose lower right corner (in Fig. 22) a first projection 106 extends. The projection 106 has a bend at its outer end. A rectangular mounting body 108 is placed on the base body 104, from whose upper left corner a rib-like projection 110 extends to the left, the left end of which (in Fig. 22) is bent downwards. When clamping the profile 102 with conventional, straight clamping jaws, there is a risk that the profile 102 will twist clockwise and thus be fixed at an angle between the clamping jaws. Machining in such a twisted state is not reasonably and precisely possible.

[0088] The profile insert 112 provides a very simple remedy here, since the clamping surface of the profile insert 112 arranged on the right in Fig. 22 can be adapted to the shape of a profile to be fixed.

[0089] For this purpose, the profile insert 112 has several clamping elements 114, each of which is plate-shaped. The profile insert 112 of Fig. 22 has a total of twelve plate-shaped clamping elements 114, see also Fig. 28. The clamping elements 114 form a clamping element stack. Each of the clamping elements 114 is provided with an elongated hole, see Fig. 28, and can be displaced relative to a housing 116 of the profile insert 112. The elongated hole of all clamping elements 114 is penetrated by a screw bolt 118, which is screwed into a threaded bore in a base 118 of the housing 116. A cover 120 of the housing 116, see Fig. 26, is provided with a slot for inserting a contour key 122, which has a shape that determines a suitable position of the individual clamping elements 114 for the respective profile 102.

[0090] The clamping elements 114 can be moved out of the housing 116 into a position suitable for clamping the profile 102. In the illustrated embodiment, this position is predetermined by the contour key 122. In the moved position shown in Fig. 22, all clamping elements 114 can be fixed in the clamping element stack by tightening the threaded bolt 118. After the clamping elements 114 have been fixed, the contour key 122 is no longer needed and can be removed, but it can also easily remain in the position shown in Fig. 22.

[0091] To clamp the profile 102, as shown in Fig. 22, only the two uppermost clamping elements 114 are moved to the left until they abut the right side of the mounting body 108 of the profile 102 (as shown in Fig. 22). The lower right-hand, strip-like projection 106, in turn, abuts the left edge of the base 118 (as shown in Fig. 22). This left edge of the base 118 simultaneously defines a zero position for the clamping device 100.

[0092] As can be seen in Fig. 22, the profile 102 can now be clamped between the left clamping jaw 14 (shown schematically as a vertical line in Fig. 22) and the profile insert 112. A clamping element 114 is schematically shown in Fig. 22, which supports the base body 104 of the profile 102 and may be part of a further profile insert 112 attached to the base 22 of the clamping jaw 14, see Fig. 1.

[0093] In the state shown in Fig. 22, the profile 102 can be securely fixed. Clockwise rotation is prevented by the two clamping elements 114 of the profile insert on the right in Fig. 22, as well as by the clamping element 114 of another profile insert 112 (not shown) on the clamping jaw 14, shown in the lower left of Fig. 22.

[0094] Providing a stack of clamping elements consisting of several plate-like clamping elements 114 allows the profile insert 112 to be adapted to essentially any profile contour. The inclusion of the contour key 122 significantly simplifies the adjustment of the clamping elements 114 within the stack and, moreover, makes the adjustment of the clamping elements repeatable and independent of the knowledge or skills of a machine operator.

[0095] At a profile machining center, for example, very different profiles are processed throughout the day. If a contour key 122 is available for each of these profiles, the profile insert 112 can be adapted to the outer contour of the profile using a suitable contour key 122 before the respective profile is inserted. This allows the adjustment of the profile inserts to each profile to be repeated, precise, and very simple. Fig. 23 shows several views of a blank 130 for manufacturing the contour key 122. The blank 130 is plate-shaped, and an area 132 is machined in a suitable manner, for example, milled, to define a desired position of the clamping elements 114 in the clamping element stack, as shown in Fig. 22.

[0096] Fig. 24 shows a front view of the housing 116 of the profile insert 112 of Fig. 22. Visible are the base 118, the cover 122 and a U-shaped connecting part 134. One base of the U-shaped connecting part 134 is provided with a bore 136 to attach the profile insert 112 to the base 20, 22 of the clamping jaws 12, 14, cf. Fig. 1.

[0097] Fig. 25 shows a side view of the housing 116.

[0098] Fig. 26 shows a top view of the housing 116.

[0099] In this view, a bore 140 can be seen (see Fig. 22), which accommodates the head of the threaded bolt 118 and allows the threaded bolt 118 to be tightened from the top of the housing 116. A slot 138 in the cover 120 of the housing 116 is also visible (see Fig. 22), for inserting the contour wrench 122.

[0100] The profile insert 122 can be adjusted very easily and repeatably to a wide variety of external contours of the profiles to be fixed. The contour key 122 ensures repeatability of a suitable setting. The contour key 122 can be manufactured quickly and easily from a simple, flat blank. Of course, manufacturing the contour key 122 using 3D printing is also easily possible.

Claims

Patent claims 1. Clamping device for a profile machining center with a base and a profile insert adapted to a profile to be fixed by means of the clamping device, wherein the profile rests against the profile insert in the clamped state, characterized in that the profile insert consists of several separate parts.

2. Clamping device according to claim 1, characterized in that the sections have at least one base part and at least one clamping part, wherein the base part is designed for attachment to the base and wherein the clamping part is designed for attachment to the base part.

3. Clamping device according to claim 2, characterized in that the at least one base part and the at least one clamping part can be connected to each other by means of a plug connection.

4. Clamping device according to claim 2 or 3, characterized in that at least one first clamping part is provided on its side facing away from the base part in the assembled state with magnetizable or magnetic elements, so that further clamping parts can be placed on the first clamping part and magnetically fixed.

5. Clamping device according to claim 1, characterized in that the sections of the profile insert have at least one guide part and several clamping parts that are movable in the guide part, wherein the clamping parts are all movable relative to the guide part exclusively in and against the same direction and parallel to each other.

6. Clamping device according to claim 5, characterized in that all clamping parts are plate-like and form a stack of clamping parts arranged in the guide part.

7. Clamping device according to claim 6, characterized in that all clamping parts have the same material thickness.

8. Clamping device according to claim 5, 6 or 7, characterized in that a contour key is provided, wherein the clamping elements which are slidable in the guide part bear their rear side, which faces away from the profile to be fixed, against the contour key, which in turn is supported on the guide part.

9. Clamping device according to claim 5, 6, 7 or 8, characterized in that the contour key is manufactured by means of 3D printing or by means of a CNC machine.

10. Clamping device according to at least one of claims 5 to 9, characterized in that a fixing device for fixing the clamping parts in the guide part is provided.

11. Clamping device according to claim 10, characterized in that the guide part has a frame with a base, wherein the clamping elements movable in the guide part are movable parallel to the base and wherein the fixing device for clamping and thereby fixing the movable clamping elements to the base is provided and arranged.

12. Method for manufacturing a profile insert for a clamping device according to one of the preceding claims, characterized by the following steps: creating a digital 3D model of at least one part and manufacturing the part using a CNC machine or a 3D printer.

13. Method for producing a profile insert for a clamping device according to one of claims 5 to 11, characterized by creating a contour key based on a cross-section of a profile to be clamped and aligning the clamping elements movable in the guide part so that their rear sides facing away from the profile to be clamped rest against the contour key.

14. Method for producing a profile insert according to claim 13, characterized by creating a digital model of the contour key and producing the contour key using a CNC machine or a 3D printer.

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