Matrix arrangement, setting device and method for attaching a functional element to a workpiece

Abstract

A die arrangement for attaching a functional element to a workpiece comprises a base body with a receiving space, wherein the receiving space defines an axial direction, has at least one end-face opening and is bounded in a radial direction by at least one side surface, a die movably arranged in the receiving space with an active section accessible at the opening for forming the functional element and / or the workpiece and / or for punching the workpiece, wherein there is a clearance between a cylindrical surface of the die and the side surface of the receiving space, and wherein the die is in an initial position in an unloaded state of the die arrangement, and at least one positioning means acting between the base body and the die for aligning the die in the receiving space, wherein the positioning means is configured and designed accordingly.to exert a restoring force on the die that counteracts any deflection of the die from its initial position.

Description

[0001] The invention relates to a die arrangement for attaching a functional element to a workpiece, in particular to a sheet metal part, a setting device for attaching a functional element to a workpiece, in particular to a sheet metal part, and a corresponding method.

[0002] Functional elements are used in a wide variety of applications, particularly in automotive engineering. They serve, for example, to create fastening points for other workpieces on a workpiece, such as a sheet metal part, or to provide other functionalities that cannot be easily or easily incorporated directly into the workpiece itself. Naturally, it is crucial that the elements can be efficiently connected to the respective workpiece. Furthermore, the connection must be strong and reliable.

[0003] Such elements are attached to the respective workpiece using setting devices. In many cases, they comprise a die assembly that includes a die with an end-face working section. This section serves to deform the functional element and / or the workpiece when the functional element is attached to the workpiece, and / or to punch a slug from the workpiece. The deformation can be hot forming and / or cold forming.

[0004] Setting devices usually have, in addition to a die arrangement, a punch opposite the die arrangement, which is designed either to hold the functional element in a fixed axial position during fastening or to press the functional element against the workpiece and / or the die (or both).

[0005] A functional element can be a bolt element whose functional section is designed as a shaft, which may be threaded. It can also be a nut element whose functional section, for example, has an internal thread. Other designs are conceivable. For instance, functional elements can also include components or sections designed for a snap-fit ​​or plug-in connection.

[0006] On the one hand, there are, for example, rivet elements that have a rivet section which is deformed when attached to a sheet metal part to form a rivet flange and, together with the head, create an annular recess for the edge of a hole in the sheet metal part. With such rivet elements, the functional element is thus deformed when attached to the sheet metal part. With press-fit elements, the sheet metal material itself is deformed to engage with undercuts of the press-fit element.

[0007] When attaching such a functional element to a workpiece, undesirable radial forces can act on the die in addition to axial (pressing) forces. These result, for example, from deviations from an optimal alignment of the die and punch, from wear of the components involved, and / or from material shrinkage during cooling in a hot forming process.

[0008] The consequences include, for example, excessive wear of the die and / or a decreasing quality of the produced element-workpiece connections.

[0009] It is therefore an object of the invention to increase the service life of matrices for attaching a functional element to a workpiece.

[0010] This problem is solved according to the invention by the features of the independent claims. Advantageous embodiments are defined in the dependent claims.

[0011] A die arrangement according to the invention for attaching a functional element to a workpiece, in particular to a sheet metal part, comprises a base body with a receiving space. The receiving space defines an axial direction, has at least one end-face opening and is bounded in a radial direction by at least one side surface.

[0012] The die assembly further comprises a die movably arranged within the receiving space of the base body. The base body thus forms a kind of housing for the die, whereby the die can change its position, particularly its radial position, within the base body under the influence of force. For example, the die can tilt or deflect under the influence of radial forces.

[0013] The die includes an active section accessible at the opening of the receiving chamber for forming the functional element and / or the workpiece and / or for punching the workpiece.

[0014] There is clearance between a lateral surface of the die and the side surface of the receiving chamber, allowing the die to move within the receiving chamber. In particular, the amount of clearance is significantly larger, preferably by at least one order of magnitude, than the manufacturing tolerances of the receiving chamber and the die.

[0015] The die is in an unloaded state within the die assembly, in a neutral position. In this unloaded state, preferably no relevant axial and / or radial forces act on the die; that is, the unloaded state is a state in which the die does not interact with the functional element and / or the workpiece to produce deformations on the workpiece and / or the functional element. Accordingly, an unloaded state can also be a state in which the workpiece is clamped in preparation for the element's fastening process, and therefore (comparatively small) forces already act on the die. However, these forces are generally only a fraction of the forces that occur during the actual fastening process.

[0016] The die arrangement further comprises at least one positioning means acting between the base body and the die for aligning the die in the receiving space, wherein the positioning means is designed and configured to exert a restoring force on the die to counteract any deflection of the die from its initial position.

[0017] This means that the positioning device essentially fulfills two functions. Firstly, it pushes the die back into its initial position after a deflection, so that the die is in the correct position relative to the punch with the functional element for the next fastening process. Secondly, the initial position of the die can be set and optimized with the aid of the positioning device. Both of these features ensure that the die arrangement according to the invention operates with particular precision and reliability.

[0018] In other words, the movable arrangement of the die within the receiving space allows for compensation of the radial forces acting on the die during the fastening process, thereby significantly reducing die wear and / or the risk of die breakage. The die of the die arrangement according to the invention is therefore characterized, among other things, by an improved service life. The die thus needs to be replaced less frequently, which in turn reduces the maintenance costs of the die arrangement and the entire setting device.

[0019] The positioning device can be designed such that the restoring force is a function of the die deflection and / or the force acting on the die during the clamping process. These relationships need not be linear everywhere. It can also be stipulated that the force acting on the die during the clamping process must exceed a threshold value before the die deflects.

[0020] According to one embodiment, the deflection of the die from its initial position occurs during the forming of the functional element and / or the workpiece and / or during the punching of the workpiece.

[0021] According to one embodiment, the restoring force acts at least partially, preferably exclusively, in the radial direction.

[0022] According to one embodiment, the base body is designed in one or more parts. In particular, the base body is made of a material such as steel.

[0023] According to one embodiment, the workpiece comprises a steel sheet, an aluminum sheet, a plastic component and / or a hybrid material such as a fiber composite.

[0024] According to one embodiment, the die comprises (hardened) steel. Additionally or alternatively, the die may have a surface coating.

[0025] According to one embodiment, the active section is ring-shaped. The active section preferably projects beyond an end face of the base body.

[0026] According to one embodiment, the base body and / or the die and / or the receiving chamber has a cylindrical shape.

[0027] Further embodiments of the invention are specified in the claims, the description and the accompanying drawings.

[0028] According to one embodiment, in the initial position of the die, the die and the base body are arranged coaxially.

[0029] According to one embodiment, the positioning means comprises at least one positioning element extending radially towards the cylindrical surface of the die. In particular, the positioning element comprises a preferably at least partially cylindrical centering pin, the end face of which rests against the cylindrical surface of the die. The positioning element can be designed as a single or multiple component. The positioning element can be movably arranged in the radial direction.

[0030] In particular, the positioning element protrudes from the side surface of the receiving space. Preferably, the positioning element is arranged at least partially within the base body.

[0031] According to one embodiment, the positioning element is pressed against the cylindrical surface of the die by at least one clamping element. This means the positioning element applies a preload force to the die. This allows the die to be movably held in position within the receiving space. The clamping element can comprise an elastic element, in particular a helical spring.

[0032] According to one embodiment, the clamping element is clamped between the positioning element and an adjustment element that can be attached to the base body. The adjustment element serves to set the preload of the positioning element and therefore to adjust the restoring force as required. It can also be used to adjust the position of the die in the receiving chamber.

[0033] According to one embodiment, the adjusting element is attached to the base body in a passage through the base body, which extends in a radial direction from an outside of the base body to the side surface of the receiving space.

[0034] According to one embodiment, the adjusting element is screwed into the passage. In particular, the adjusting element comprises a (grub) screw screwed into the passage from the outside. In particular, the passage is preferably a multi-stage bore.

[0035] According to one embodiment, the adjusting element is recessed in the base body, which makes the matrix arrangement particularly compact.

[0036] According to one embodiment, the passage is cylindrical in design.

[0037] According to one embodiment, the passage has several sections arranged radially offset, preferably three, which are connected to one another.

[0038] According to one embodiment, the sections of the passage have different inner diameters. In particular, the sections of the passage are designed to accommodate at least one section of the positioning element, the adjustment element, and / or the clamping element.

[0039] According to one embodiment, the sections of the passage are arranged coaxially.

[0040] According to one embodiment, the positioning element and / or the clamping element is arranged at least sectionally in the passage, preferably coaxial to the passage.

[0041] According to one embodiment, the adjusting element comprises an actuating section accessible on the outside of the base body for setting a radial position of the adjusting element. The actuating section enables simple and precise adjustment of the tension of the clamping element and thus of the restoring force acting on the die.

[0042] The adjustment can be made manually. The actuation section includes, for example, a screw head for a slotted, Phillips, or hex screwdriver.

[0043] According to one embodiment, the positioning element comprises a preferably cylindrical receiving chamber for at least partially receiving the clamping element, which makes the positioning element particularly compact. In particular, the receiving chamber adjoins the centering pin in the radial direction. In particular, the receiving chamber and the centering pin are arranged coaxially. In particular, one circumference of the receiving chamber is larger than one circumference of the centering pin.

[0044] According to one embodiment, the die arrangement further comprises at least one securing means for securing the die in the receiving space.

[0045] In particular, the locking device is designed and configured to essentially lock movement of the die in the axial direction and / or around the axial direction, while allowing movement of the die in the radial direction. That is, the locking device ensures that the die can tilt and / or move radially during the forming and / or stamping process, but cannot be lifted out of the receiving space and / or rotate.

[0046] According to one embodiment, the locking device comprises a preferably cylindrical fixing pin that extends radially into a recess in the die. The centering pin secures the die particularly reliably against rotation and / or lifting out of the receiving space.

[0047] The locking device can be designed and arranged analogously to the positioning device, i.e., the fixing pin can be pre-tensioned by a clamping element that is clamped between the fastening element and the fixing pin, just like the centering pin, and / or the elements of the locking device can be arranged at least section by section in a radial passage of the base body.

[0048] According to one embodiment, several positioning means are provided, distributed circumferentially and / or axially. This allows for finer adjustment of the restoring force and / or the alignment of the die in the receiving space.

[0049] The multiple positioning means can be arranged in a plane distributed circumferentially, preferably at equal intervals. The plane can be arranged perpendicular to the axial direction.

[0050] The multiple positioning means can also be arranged in several planes distributed circumferentially, preferably at equal intervals, with the planes being arranged perpendicular to the axial direction. For example, the multiple positioning means are arranged in two, three, or more axially offset planes. The three or more planes can have the same axial spacing. In particular, the multiple positioning means are arranged offset in adjacent planes.

[0051] The axial position of the die can be determined as required by at least one axial positioning device, in particular by one or more suitable adjustment disk(s) arranged between the die and a base section or stop of the receiving chamber. Alternatively or additionally, at least one adjustable axial positioning device can be provided (e.g., one or more screws projecting axially from below into the receiving chamber).

[0052] According to one embodiment, the base body has an axial passage that connects the receiving space to a bottom side of the base body.

[0053] According to one embodiment, the die also has an axial passage which is connected to the axial passage of the base body, in particular via an axial passage of a tuning disk.

[0054] The axial passages of the base body, the die and / or the tuning disc can be arranged coaxially and serve as a channel for removing a slug punched out of the workpiece by means of the die.

[0055] The width of the axial passage of the die can be smaller than the width of the axial passage of the tuning disk and / or the width of the axial passage of the base body.

[0056] According to one embodiment, the receiving chamber is axially limited on one side opposite the end-face opening by a stop for the die. The stop can be a bottom section of the receiving chamber.

[0057] An inventive setting device for attaching a functional element to a workpiece, in particular to a sheet metal part, comprises a die arrangement according to at least one of the embodiments described above and a punch which is designed and configured to cooperate with the functional element.

[0058] According to one embodiment, the setting device is designed and configured to generate a relative movement in the axial direction between the die on one side and the workpiece and the functional element on the other side.

[0059] According to one embodiment, the punch with the functional element is movable in the axial direction, and the die assembly is arranged in a fixed axial position. Alternatively, the die assembly is movable in the axial direction, and the punch with the functional element is arranged in a fixed axial position. Alternatively, the die assembly and the punch with the functional element are movable in the axial direction so that they can be moved towards each other.

[0060] A method according to the invention for attaching a functional element to a workpiece, in particular to a sheet metal part, using the setting device according to at least one of the embodiments described above, comprises providing the workpiece and providing the functional element. Providing the workpiece or the functional element may include pre-processing the workpiece or the functional element, for example, surface treatment, e.g., grinding and / or an anti-corrosion coating, and / or a forming process.

[0061] The process further comprises placing the functional element against a top surface of the workpiece and placing the die assembly against a bottom surface of the workpiece opposite the top surface, as well as generating a relative movement between the functional element and the die assembly to form the functional element and / or the workpiece and / or to punch the workpiece. This step serves to secure the functional element to the workpiece. To generate the relative movement between the functional element and the die assembly, the functional element and / or the die assembly can be pressed against the workpiece. The sequence in which the functional element and the die assembly are placed against the workpiece can be freely chosen. They can also be placed simultaneously.

[0062] For example, if there is a slight deviation from an ideal alignment of the die and the functional element, the die is deflected from its initial position during the fastening process of the functional element to the workpiece and then pushed back into its initial position to automatically compensate for this misalignment. The method according to the invention is therefore gentle on the die and is also particularly reliable.

[0063] The invention is described below by way of example with reference to advantageous embodiments and the accompanying figures. These show: Fig. 1. A perspective view of a matrix arrangement, Fig. 2 a composite side and cross-sectional view of the matrix arrangement of Fig. 1 Fig. 3 a cross-sectional view of the matrix arrangement of Fig. 1, Fig. 4 a view of an end face of the matrix arrangement of Fig. 1, Fig. 5 a detailed view of a positioning device, Fig. 6 a detailed view of a safety device, and Fig. 7 a perspective view of a setting device.

[0064] The in the Fig. The matrix arrangement 10 shown in Figures 1 to 3 comprises a base body 12 with a receiving chamber 14 in which a matrix 20 is movably arranged. The base body 12 and the matrix 20 have a cylindrical shape and are arranged coaxially in the initial position of the matrix 20 shown. However, the base body 12 and the matrix 20 can also, for example, have a rectangular shape.

[0065] The die 20 has an active section 22 on its end face for forming a functional element and / or a workpiece and / or for punching a workpiece, which projects from an opening 16 of the receiving chamber 14. In the illustrated embodiment, the active section 22 is designed in an annular shape (see Fig. 4).

[0066] Between a side surface 18 of the receiving space 14 and a lateral surface 26 of the matrix 20 there is a clearance 24 (see Fig. 2, Fig. 3) That is, the die 20 does not laterally contact the base body 12. The amount of the clearance 24 is chosen such that the die 20 can deflect radial forces acting upon it during use. Simultaneously, dies 20 of different widths can be mounted in the base body 12.

[0067] A base surface 60 of the die 20 rests against a tuning disk 58, which serves to adjust the axial position of the die 20 relative to the base body 12. Therefore, dies 20 of different lengths can also be inserted into the base body 12.

[0068] The lower side surface of the tuning disk 58, opposite the die 20, rests against an axial stop 34 for the die 20, which axially limits the receiving chamber 14 on one side opposite the end-face opening 16. The stop 34 ensures that the die 20 is held in a fixed axial position during use.

[0069] The tuning disc 58 is optional, meaning that the base surface 60 of the die 20 can also rest directly against the stop 34.

[0070] In the present example, the axial position of the die 20 was adjusted with the help of the disk 58 such that an end face 30 of the base body 12 and an end face 31 of the die 20 (see Fig. 3) lie in a plane. Surfaces 30, 31 form a support surface on which a workpiece rests when a functional element is placed and / or during a forming step.

[0071] The base body 12 has an axial passage 54 on its underside 57, which, together with an axial passage 56 of the tuning disk 58 and an axial passage 52 of the die 20, forms a channel for removing a slug punched from the workpiece by the working section 22 of the die 20. The axial passages 52, 54, and 56 are arranged coaxially.

[0072] The axial passage 52 of the die 20 is narrower than the axial passages 56 and 54 of the tuning disc 58 and the base body 12, which ensures the removal of the slug even when the die 20 is deflected in radial direction R from the starting position shown during use.

[0073] The base body 12 further has several circumferentially distributed securing sections 62 on its outer surface 53 for securing the base body 12 to another component of a machine tool, in particular a component 102 of a setting device 100 (see Fig. 7) In the illustrated embodiment, the locking or engagement sections 62 are designed as elongated recesses for clamping the base body 12.

[0074] The matrix arrangement 10 further comprises several positioning means 28, which are arranged in several axially offset planes perpendicular to the axial direction A. The positioning means 28 of each plane are distributed circumferentially and equidistantly. The positioning means 28 of adjacent planes are offset.

[0075] It is understood that the positioning means 28 can also be arranged in only one plane or in more than the three planes shown. An embodiment is also conceivable in which the positioning means 28 of adjacent planes are not offset, but rather lie one above the other when viewed in the axial direction A. The distances between adjacent planes and / or the number of planes can be adapted to the length of the die 20. The number of positioning means 28 per plane can be adapted to the circumference of the die 20.

[0076] The positioning means 28 act between the base body 12 and the die and exert a restoring force on the die 20, counteracting any deflection of the die 20 from its initial position. Furthermore, the die 20 can be aligned in the receiving space 14 with the aid of the positioning means 28, as described below with reference to Fig. 5 will be explained in more detail.

[0077] As shown in the cross-sectional view in Fig. As shown in Figure 5, each of the positioning means 28 comprises a positioning element 42 extending radially in direction R towards the cylindrical surface 26 of the die 20. The positioning element 42 comprises a cylindrical centering pin 43 and a cylindrical receiving chamber 50 adjoining the centering pin 43 in the radial direction R. The centering pin 43 and the receiving chamber 50 are arranged coaxially.

[0078] An end face 47 of the centering pin 43 interacts with the cylindrical surface 26 of the die 20. The receiving space 50 is designed to receive part of a clamping element 44, which presses the centering pin 43 against the die 20. In the illustrated embodiment, the clamping element 44 is designed as a helical spring. However, the clamping element 44 can also be designed as another suitable elastic element, for example, comprising a rubber material or similar.

[0079] The clamping element 44 is clamped between the positioning element 42 and an adjusting element 46 that can be attached to the base body 12. The adjusting element 46 is designed as a screw that is screwed into a passage in the base body 12, which extends radially R from the outer surface 53 of the base body 12 to the side surface 18 of the receiving space 14. The actuating section 32 of the adjusting element 46, designed as a screw head, is recessed into the base body 12 and serves to adjust the radial position of the adjusting element 46.

[0080] If the actuating section 32 is screwed further into the base body 12, for example by means of a screwdriver or the like, the tension of the coil spring increases, and thus the preload force exerted on the die 20 in the radial direction R by the centering pin 43 increases. If the actuating section 32 is screwed towards the outer side 53 of the base body 12, the preload force decreases accordingly. By actuating all or part of the positioning means 28 of the die assembly 10, the position and orientation of the die 20 within the receiving space 14, as well as the restoring force, can be precisely adjusted.

[0081] The actuating section 32, the clamping element 44, the receiving chamber 50, and part of the centering pin 43 are arranged in the radial passage of the base body 12, coaxially to the passage. An end section 43 of the centering pin 43 is arranged in the receiving chamber 14 of the base body 12.

[0082] The radial passage of the base body 12 comprises three sections 63, 64 and 65 adjoining each other in the radial direction R, with different inner diameters for receiving the positioning element 42 and the actuating section 32.

[0083] The matrix arrangement 10 further comprises a securing device 36 for securing the matrix 20 in the receiving chamber 14 (see Fig. 3) The locking device 36, with a certain amount of play, prevents movement of the die 20 in axial direction A and around the axial direction A, while allowing movement of the die 20 in radial direction R. This means that the locking device 36 ensures that the die 20 can tilt and / or move to a certain extent in the radial direction when force is applied, but cannot be lifted out of the receiving space 14 or rotate (excessively).

[0084] In the illustrated embodiment, the die arrangement 10 comprises exactly one locking element 36 arranged in the upper part of the base body 12. It is understood that several locking elements 36 may also be provided, and that the position of the locking element 36 or locking elements 36 is not limited to the position shown.

[0085] The one in Fig. 6 security devices shown in detail 36 differs from the one in Fig. The positioning means 28 shown in Figure 5 differs essentially in that, instead of a centering pin 43, a cylindrical fixing pin 38 is provided, which is pressed into a recess 40 of the die 20 by means of the clamping element 44. The recess 40 extends in the radial direction R and is, for example, a bore. An end face 48 of the fixing pin 38 rests against a surface 49 of the recess 40 arranged parallel to the axial direction A. The recess 40 is slightly wider than the fixing pin 38, which simplifies the insertion of the centering pin 38 into the recess 40 during assembly.

[0086] The in Fig. The setting device 100 shown in Figure 7 comprises a punch 104 and a schematically depicted die arrangement 10 opposite the punch 104, which is held by a component 102 of the setting device 100. The component 102 is designed as a mounting plate.

[0087] The punch 104 is part of a setting head 106, which can be used to bring rivet and / or press-fit elements (not shown) into contact with a workpiece (not shown). To attach a functional element to a workpiece, a pressing force is applied between the punch 104 and the die assembly 10, acting in axial direction A.

[0088] It is understood that the matrix arrangement according to the invention can also be used in setting devices of other designs. Reference symbol list 10 Matrix Arrangement 12 basic shapes 14 Recording room 16 front opening 18 side surface 20 die 22 Effective section 24 Game 26 Surface area 28 Positioning devices 30 Front side (basic body) 31 Front side (matrix) 32 Actuation section 34 attacks 36 safety devices 38 fixing pins 40 Exclusion 42 Positioning element 43 centering pins 44 clamping element 46 Fastening element 47 Front 48 Front 48 centering pins 49 area 50 Recording section 52 axial passage 53 Outside 54 axial passage 56 axial passage 57 Underside 60 floor area 62 Safety section 63 first section 64 second section 65 third section 100 setting device 102 components 104 stamps A axial direction R radial direction

Claims

[1] Die arrangement (10) for attaching a functional element to a workpiece, in particular to a sheet metal part, comprising a base body (12) with a receiving space (14), wherein the receiving space (14) defines an axial direction (A), has at least one end-face opening (16) and is bounded in a radial direction (R) by at least one side surface (18), a die (20) movably arranged in the receiving space (14) with an active section (22) accessible at the opening (16) for forming the functional element and / or the workpiece and / or for punching the workpiece, wherein a clearance (24) exists between a cylindrical surface (26) of the die (20) and the side surface (18) of the receiving space (14), and wherein the die (20) is in an initial position in an unloaded state of the die arrangement (10), and at least one positioning means (28) acting between the base body (12) and the die (20) for aligning the die (20) in the receiving space (14), wherein the positioning means (28) is designed and configured to exert a restoring force on the die (20) that counteracts a deflection of the die (20) from its initial position. [2] Matrix arrangement (10) according to claim 1, wherein in the initial position of the matrix (20) the matrix (20) and the base body (12) are arranged coaxially. [3] Matrix arrangement (10) according to claim 1 or 2, wherein the positioning means (28) comprises at least one positioning element (42) which extends in a radial direction (R) towards the lateral surface (26) of the die (20), in particular wherein the positioning means (28) comprises a preferably at least partially cylindrical centering pin (43) whose end face (47) rests against the lateral surface (26) of the die (20). [4] Die arrangement (10) according to claim 3, wherein the positioning element (42) is pressed against the lateral surface (26) of the die (20) by at least one clamping element (44). [5] Matrix arrangement (10) according to claim 4, wherein the clamping element (44) comprises an elastic element, in particular a helical spring. [6] Matrix arrangement (10) according to claim 4 or 5, wherein the clamping element (44) is clamped between the positioning element (42) and an adjustment element (46) that can be attached to the base body (12). [7] Matrix arrangement (10) according to claim 6, wherein the adjusting element (46) is attached to the base body (12) in a passage of the base body (12) which extends in radial direction (R) from an outer surface (53) of the base body (12) to the side surface (18) of the receiving space (14), in particular wherein the fastening element (46) is screwed into the passage. [8] Matrix arrangement (10) according to claim 7, wherein the positioning element (42) and / or the clamping element (44) are arranged at least sectionally in the passage, preferably coaxial to the passage. [9] Matrix arrangement (10) according to at least one of claims 6 to 8, wherein the adjusting element (46) comprises an actuating section (32) accessible on the outside (53) of the base body (12) for setting a radial position of the adjusting element (46). [10] Matrix arrangement (10) according to claim 8 or 9, wherein the positioning element (42) comprises a preferably cylindrical receiving space (50) for receiving the clamping element (44) at least partially, in particular wherein the receiving space (50) connects to the centering pin (43) in a radial direction (R). [11] Die arrangement (10) according to at least one of the preceding claims, further comprising at least one locking means (36) for securing the die (20) in the receiving space (14), in particular wherein the locking means (36) is configured and designed to substantially block movement of the die (20) in the axial direction (A) and / or about the axial direction (A) and to allow movement of the die (20) in the radial direction (R). [12] Matrix arrangement (10) according to claim 11, wherein the locking means (36) comprises a preferably cylindrical fixing pin (38) which extends in a radial direction (R) into a recess (40) of the matrix (20). [13] Matrix arrangement (10) according to at least one of the preceding claims, wherein several positioning means (28) are provided distributed in the circumferential direction and / or in the axial direction (A). [14] Matrix arrangement (10) according to at least one of the preceding claims, wherein an axial position of the matrix (20) can be determined by at least one axial positioning means, in particular by at least one tuning disk (58) arranged between the matrix (20) and a bottom section or stop (34) of the receiving space (14). [15] Matrix arrangement (10) according to at least one of the preceding claims, wherein the base body (12) has an axial passage (54) connecting the receiving space (14) with a bottom surface (57) of the base body (12). [16] Matrix arrangement (10) according to claim 13, wherein the matrix (20) has an axial passage (52) which is connected to the axial passage (54) of the base body (12), in particular via an axial passage (56) of a tuning disk (58). [17] Setting device (100) for attaching a functional element to a workpiece, in particular to a sheet metal part, comprising a die arrangement (10) according to at least one of the preceding claims and a punch (104) which is configured and designed to cooperate with the functional element. [18] Method for attaching a functional element to a workpiece, in particular to a sheet metal part, using the setting device (100) according to claim 17, the method comprising: Providing the workpiece, Providing the functional element, Attaching the functional element to a top side of the workpiece, and Positioning the die arrangement (10) against one of the undersides of the workpiece opposite the top side, Generation of a relative movement between the functional element and the die arrangement (10) for forming the functional element and / or the workpiece and / or for punching the workpiece, wherein the die (20) is deflected from its initial position during the fastening process of the functional element to the workpiece and is then pushed back into its initial position.

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