Crimping die for a crimping tool

Abstract

The invention relates to a crimping die (1) for a crimping tool (100), comprising: a crimping punch (3) having a punch element (31); and a die plate (5), the die plate (5) having two die plate elements (53A, 53B), and the die plate elements (53A, 53B) being arranged on a base surface (51) so as to be movable with respect to one another, wherein the crimping punch (3) is designed such that, when the crimping die (1) carries out a closing movement in the direction of the base surface (51) at least a portion of the punch element (31) is moved to between the two die plate elements (53A, 53B) and the two die plate elements (53A, 53B) are moved towards one another.

Description

[0001] Crimping die for a crimping tool

[0002] The invention relates to a crimping die for a crimping tool according to the preamble of claim 1 and a crimping tool with such a crimping die according to claim 15.

[0003] Such a crimping die comprises a crimping punch, which has a punch element, and a die.

[0004] Crimp dies are used in crimping pliers to crimp stripped conductor ends of multi-stranded conductors, such as fine or extra-fine stranded conductors, with a ferrule to prevent fraying of the stripped conductor ends. Crimping with ferrules is commonly referred to as "crimping" in the prior art. Various crimp profiles, or cross-sections of the crimped ferrules, can be produced with the crimp dies known from the prior art, such as square profiles, hexagonal profiles, trapezoidal profiles, or indent / mandrel profiles.

[0005] For processing various wire ferrules with different diameters or conductor cross-sections, crimping pliers with self-adjusting crimping dies are often used, which automatically adjust a crimping force to the cross-section.

[0006] For example, WO 2012 / 062538 A1 describes a crimping die with two die halves that move linearly towards each other, designed as a crimping punch and die, for producing a trapezoidal profile when crimping the wire ferrule. A disadvantage, however, is that, particularly with small conductor cross-sections, areas of the wire ferrule can protrude beyond a wall or material distortion created by the crimping process due to the crimping punch being inserted too deeply into the ferrule material. This excess material can make it difficult to subsequently insert the conductor into a clamping point and to securely clamp the wire ferrule in the clamping point.

[0007] Crimp dies function similarly to the previously described crimp die, using two interlocking, V-shaped die halves with a lamellar structure to create a square profile on the crimped wire ferrule. However, a disadvantage is that the lamellae create many small, wavy indentations along the ferrule in the crimped area. Such indentations can make it difficult to subsequently insert the conductor into a clamping point and to securely clamp the wire ferrule in the clamping point.

[0008] A crimping die comprising crimping punches that close on four sides, as described, for example, in EP 2 930 797 A1, allows for a significantly improved geometry of the crimped wire ferrule. Unlike the trapezoidal and square crimps described previously, the geometry of the wire ferrule remains nearly constant even with different cross-sections being crimped. Particularly with smaller cross-sections, the structure in the crimped area of ​​the wire ferrule is flatter than with the square crimp using lamellar die halves. However, the crimping die with crimping punches that close on four sides requires a complex die design and a high force to apply during the crimping process.

[0009] The object of the present invention is to provide a crimping die that combines the advantages of the simple design of crimping dies with two die halves that can be moved linearly towards each other with the surface properties of a square crimp that remain constant over a wide cross-sectional area and that can be achieved with a crimping die comprising a crimping punch that closes from four sides.

[0010] This problem is solved by an object having the features of claim 1.

[0011] Accordingly, it is provided that the die has two die elements, wherein the die elements are arranged on a base surface so as to be movable relative to each other, and the crimping punch is adapted to move the punch element at least partially between the two die elements by a closing movement of the crimping die in the direction of the base surface, and to move the two die elements towards each other.

[0012] The crimping die can be referred to as the first die part, and the die as the second die part. When mounted in the crimping tool, the two die parts can be moved towards each other, particularly linearly, to crimp the wire end ferrule.

[0013] The crimping die has a punch element which, through its primarily linear movement towards the die or base, displaces material from the wire ferrule inserted between the die parts and compresses or presses it into a space bounded by the punch element, the die elements, and the base. The crimping action can be achieved by moving the components defining this space towards each other. This primarily linear movement continuously reduces the space available for crimping the wire ferrule onto the conductor end.

[0014] The die has two die elements that are movably arranged relative to each other on a base. The die elements can be arranged opposite each other on the base and form an opening for the wire end ferrule, the opening being bounded on three sides by the die elements and the base, and the punch element acting on the wire end ferrule from one side opposite the base. In the following description, the two movable die elements can also be referred to as further punch elements, or as a second and a third punch element, since they are movable relative to each other on the base by the crimping punch, which incorporates the first punch element. The base can also be referred to as the die surface, since it is fixed to the die, or the second die part.

[0015] The crimping die is designed so that, through a closing movement of the crimping die, the punch element is moved towards the base surface, at least partially, between the two die elements. For this purpose, the punch element can extend longitudinally and essentially perpendicular to the crimping die, which can also be referred to as the die body. Furthermore, the crimping die has a geometry that allows it to mechanically contact and move the die elements towards each other when the crimping die is moved towards the base surface. Simultaneously, the punch element is moved towards the base surface, at least partially, between the two die elements to crimp the inserted wire end ferrule.By moving the die elements towards each other, i.e., by their mutual, and especially simultaneous, approach during the closing movement of the crimping die, perpendicular to the closing movement, an approximately square or rectangular crimp can be produced when crimping the wire ferrule. The crimped wire ferrules have a square or near-square cross-section, regardless of their diameter. Such a crimping die can be manufactured simply and cost-effectively from just a few components.

[0016] In one embodiment, the die elements have inclined sliding surfaces facing away from each other, and the crimping die has a recess for each of the die elements, wherein the recesses each have a complementary inclined sliding surface for sliding the inclined sliding surface of the respective die element during the closing movement of the crimping die.

[0017] The inclined sliding surfaces can be understood as surfaces that run along the die elements and are inclined relative to the base. For example, the inclined sliding surfaces can run at an angle of 45° relative to the base. The die elements can be arranged as a mirror image to the direction of the closing movement, or to the direction of travel of the punch element, and the inclined sliding surfaces can each run along a section of the circumference of the die element that is opposite the opening formed by the die elements, or the sliding surfaces can be arranged on the die elements facing away from the opening.

[0018] The two recesses can be identically designed and have a geometry that essentially corresponds to the geometry of the die elements, in order to at least partially receive one of the die elements when the crimping die closes. For example, the die elements can be completely received in their respective openings when the crimping die is fully closed. For this purpose, each recess has a complementary inclined sliding surface. This surface allows the inclined sliding surface of the respective die element to slide during the closing movement of the crimping die and to insert the movably arranged die elements into the recesses. The sliding surfaces can have a continuous, a stepped, or a combination of both.By forming step-like ridges along the sliding surfaces, the user can be given haptic feedback regarding a specific position of the crimping die relative to the die when crimping the wire end sleeve.

[0019] By using sliding surfaces, the die elements can be moved towards the wire end ferrule simultaneously with the movement of the crimping die. This eliminates the need for additional components to move the die elements, allowing for cost-effective manufacturing of the crimping die.

[0020] In one embodiment, each of the two inclined sliding surfaces of the matrix elements is coupled to the complementary inclined sliding surface of the respective recess.

[0021] In this context, coupling can be understood as the connection of the inclined sliding surfaces of the die elements to the complementary inclined sliding surfaces of the respective recess in such a way that the distance between the respective parallel sliding surfaces remains constant during the opening and closing movements of the die elements. This prevents the sliding surfaces from moving away from each other, while simultaneously allowing them to slide against each other. The coupling is configured in such a way that a relative movement between the crimping die and the die, particularly during opening and closing movements, causes a relative movement between the die elements. This movement of the die elements is directed transversely, preferably orthogonally, to the direction of the relative movement between the crimping die and the die.In particular, the coupling is such that the relative movements are of the same type, so that a closing movement in which a relative movement occurs between the crimping punch and the die towards each other causes a relative movement of the die elements towards each other.

[0022] This allows the die elements to be moved away from each other again during the opening movement of the crimping die, or during a movement of the crimping die away from the base surface, in order to enable easy removal of the crimped wire end sleeve.

[0023] In one embodiment, the sliding surfaces are coupled via guide elements. These guide elements are, in particular, dovetail guide elements or T-slot guide elements. The guide elements can extend along a sliding direction of the sliding surfaces, with one guide element being arranged on a sliding surface of the crimping die and a corresponding guide element being arranged on the complementary sliding surface of the die element. The guide elements can interact to couple the movements of the crimping die and the respective die element.

[0024] The positive guidance created by the coupling moves the die elements away from each other when the crimping die is opened, thus offering a cost-effective and simple implementation of a kinematic mechanism for opening the crimping die.

[0025] In one embodiment, the stamp element extends between the two recesses towards the base.

[0026] For example, a recess can first be made in a surface of the crimping die, into which the longitudinally shaped die element is inserted in the middle to form the two recesses.

[0027] In one embodiment, the two matrix elements and the two corresponding recesses are trapezoidal in shape.

[0028] Due to the trapezoidal design of the two die elements, the space created by the two die elements opens in a funnel shape towards the punch element and can therefore be easily inserted into the space during a closing movement of the crimping die.

[0029] In one embodiment, the punch element, the two die elements, and the base each have a pressing surface; in particular, two adjacent pressing surfaces are arranged at a 90° angle to each other. The pressing surface can be defined as the area on the respective elements / surfaces that comes into contact with the wire ferrule during crimping. The pressing surfaces can be made of a different material, for example, a stronger material than the rest of the crimping die. Alternatively or additionally, the pressing surfaces can have a textured surface to emboss a section of the crimped wire ferrule, to mark the wire ferrule, to simplify insertion of the wire ferrule into the clamping point, and / or to improve the electrical contactability of the wire ferrule.Therefore, in one embodiment, at least one of the pressing surfaces has a structured surface, in particular a surface with rib elements and / or recesses formed on it. In a further embodiment, at least one of the pressing surfaces has a convex or concave curved surface.

[0030] In one embodiment, an elastic element is arranged between the die elements, which is adapted to move the die elements away from each other during an opening movement of the crimping die.

[0031] The elastic element can be used in addition to or as an alternative to coupling the sliding surfaces to move the die elements away from each other by means of a spring force during the opening movement of the crimping die, thus enabling easy removal of the crimped wire end ferrule. For example, the elastic element can be designed to be spring-elastic. In particular, the elastic element can be designed as a spring, for example as a compression spring, a tension spring, or a combination of compression and tension springs.

[0032] In one embodiment, the matrix elements each have a guide element, wherein the guide elements are adapted to guide the respective matrix element in and against an expansion direction of the base surface on the base surface.

[0033] The guide elements can, for example, be designed as guide openings through which the base surface extends. The guidance provided by this allows the die elements to move towards or away from each other on the base surface in the direction of the base's extension, but not perpendicular to this direction. In one embodiment, the crimping die has a limiting element that is adapted to stop the closing movement of the crimping die when the die elements reach a defined position relative to each other, and / or when a defined crimping force is detected.

[0034] The limiting element ensures that the crimping process ends when the defined position, also known as the end position, is reached, preventing further crimping. This limiting element can also be called a movement stop and can be implemented, for example, through mechanical contact between the die elements and the crimping punch, or by a rod-like element that limits the closing movement of the crimping die.

[0035] Alternatively or additionally, the limiting element can be adapted to terminate the pressing process upon detection of a defined pressing force.

[0036] In one embodiment, the crimp die has at least one deformation element which is arranged on the punch element, on at least one of the die elements, or on the base surface.

[0037] The at least one deformation element can also be referred to as a forced deformation element and can be designed as a material protrusion extending from a surface of the punch element, the die elements, or the base surface that comes into contact with the wire end ferrule during crimping. The crimp, or indentation, created by the deformation element can accommodate the excess material resulting from the crimping process.

[0038] In some embodiments, the punch element, the die elements, and the base each have a deformation element, so that when pressing from four sides, a crimp is introduced into the wire end sleeve.

[0039] In one embodiment, at least one deformation element is adapted to be extendable from the punch element, the die elements, or the base surface during a closing movement of the crimping die. In particular, the deformation element is adapted to be extendable from the pressing surface of the punch element, the die elements, or the base surface.

[0040] For example, the forming element can be moved towards the inserted wire end ferrule, or into the material of the wire end ferrule, by a closing movement of the crimping die or crimping tool. This movement can be achieved by means of a rod-like drive element, which moves the forming element during a closing movement.

[0041] This allows for a multi-stage crimping process, as the larger cross-section of the crimped wire end ferrule generates a significant amount of excess material, which is redirected and processed during the crimping process to prevent cracking. In particular, the excess material can be reliably removed from the corner areas of the crimped wire end ferrule, resulting in good crimping results.

[0042] In one embodiment, the punch element is movably arranged on the crimping punch and is adapted to be moved away from the crimping punch in the direction of the base when a movement stop is reached during a movement in the direction of the base.

[0043] The movement stop can be understood here as an element that is actuated during a closing movement of the crimping die between the open position and the closed position, and that causes the punch element to be moved out of the crimping die, or rather, extended.

[0044] When the movement stop is reached during a pressing operation, a further pressing stage can be triggered, whereby the punch element moves away from the crimping die towards the base surface, thereby narrowing the receiving space for the wire end ferrule. The movement of the punch element can occur simultaneously with the movement of the two die elements relative to each other. Alternatively, the punch element can extend towards the base surface after the two die elements have moved relative to each other. The movement of the punch element towards the base surface can be faster than the movement of one of the die elements. This design allows a wide range of wire end ferrules with different diameters to be crimped.

[0045] In one embodiment, at least one of the die elements, and in particular both die elements, is designed in two parts, wherein a first part is movably arranged on a second part and is adapted, upon reaching a movement stop during a movement of the two die elements relative to each other, to be moved by the crimping die towards the opposite die element. In this embodiment, a uniform movement of the crimping die can effect a two-stage movement of the opposite die elements.

[0046] Alternatively or additionally to the movable punch element, in a further pressing stage a movable part of one of the two die elements, in particular two corresponding movable parts of the two die elements, can be moved towards each other in order to narrow the receiving space for the wire end sleeve. The movement of the first part can occur simultaneously with the movement of the second part. Alternatively, the movement of the first part can occur after the two die elements have been moved towards each other. The movement of the first part can be faster than the movement of the second part of the die element.

[0047] A further pressing stage can also be achieved through sliding surfaces and complementary sliding surfaces that are inclined at different angles. This allows even small cross-sections to be pressed. For large cross-sections, the punch element and the die elements can be coupled in their movement, and for small cross-sections, the punch element and the die elements can extend further into the crimping chamber.

[0048] In one embodiment, the crimping die has a reset element that is adapted to open the crimping die when the closing movement of the crimping die stops.

[0049] The return element can be designed, for example, as a spring / ratchet and can also be referred to as a ratchet element. The ratchet element can be sector-shaped and designed to disengage upon reaching the defined crimping force, the defined position of the die elements relative to each other, or a defined crimping path, thereby opening the crimping die.

[0050] The invention further relates to a crimping tool, which is in particular designed as a crimping hand tool and has a crimping die as described herein.

[0051] The crimping tool can be designed like crimping pliers, particularly as a hand crimping tool. The crimping pliers can be manually operated, with the crimping die actuated by manually pulling the two handles of the pliers. The crimping die can be positioned between two working points of the crimping tool connected to the handles. These working points can also be referred to as jaws. When the handles are pulled, the working points can move relative to each other, thereby actuating the crimping die.

[0052] In one embodiment, the crimping tool has the previously described reset element. Alternatively, instead of arranging the reset element on the crimping die, it can also be arranged on the crimping tool itself.

[0053] The underlying concept of the invention will be explained in more detail below with reference to the embodiment shown in the figures. The figures show:

[0054] Fig. 1 shows a view of a crimping die;

[0055] Fig. 2 shows a cross-sectional view through a sliding surface and a complementary sliding surface coupled to each other via a dovetail guide, according to Fig. 1;

[0056] Fig. 3A - 3E Front views of the crimping die with inserted wire end sleeve, according to Fig. 1;

[0057] Fig. 4 shows a view of a crimping die with an elastic element.

[0058] Fig. 5 shows a view of a crimping tool with a crimping die; Figs. 6A, 6B, 7A, 7B show views of a crimping die with a limiting element;

[0059] Fig. 8 shows a view of a crimping die with a movable

[0060] Stamp element;

[0061] Fig. 9 shows a view of a crimping die with a movable

[0062] Stamp element and an adjustable limiting element;

[0063] Fig. 10A, 10B Views of a crimping die with a movable punch element and two-part die elements;

[0064] Fig. 11 shows a view of a crimping die with a movable

[0065] Stamp element, two-part die elements and a deformation element; and

[0066] Fig. 12A, 12B Views of a crimping die with extendable connecting elements in a crimping tool.

[0067] Figure 1 shows a view of a crimping die 1 with a crimping punch 3, which has a punch element 31. The crimping die 1 also has a die 5 with two die elements 53A, 53B. The two die elements 53A, 53B are movably arranged on the base 51. In the embodiment shown, the die elements 53A, 53B are freely movable on the base 51. The die elements 53A, 53B can therefore be moved towards and away from each other, or shifted on the base 51. Guide elements can optionally be used to guide the die elements 53A, 53B on the base, as shown below in Figure 4. The die elements 53A, 53B shown are arranged interchangeably in the crimping die 1 in order to be able to change the travel distance on the base surface 51 by using die elements with different stops.

[0068] The crimping die 3 shown has a punch element 31 which, by a closing movement in the closing direction S, or by a linear movement towards the base surface 51, displaces and compresses or presses into a space formed by the wire end ferrule (not shown in Figure 1) inserted between the crimping die 3 and the die. This space is bounded by the punch element 31, the die elements 33A and 33B, and the base surface 51. The linear closing movement in the closing direction S continuously reduces the space for crimping the wire end ferrule onto a conductor end, as shown in Figures 3A-3E.

[0069] The crimping die 3 shown has a recess 33A, 33B for each of the die elements 53A, 53B. The two recesses 33A, 33B are identical and have a geometry corresponding to the geometry of the die elements 53A, 53B, in order to accommodate at least one of the die elements 53A, 53B, at least partially, when the crimping die 1 is closed in the closing direction S. As shown in Figure 1, the two die elements 53A, 53B and the two corresponding recesses 33A, 33B are trapezoidal in shape.

[0070] The closing movement in the closing direction S moves the two matrix elements 53A, 53B in the displacement direction V. A , or VB, are moved relative to each other, with the displacement direction V A , or V BThe movement is perpendicular to the closing direction S. Simultaneously, during the closing movement in the closing direction S, the punch element 31 is moved at least partially between the two die elements 53A, 53B in the closing direction S in order to crimp an inserted wire end sleeve.

[0071] To move the die elements 53A, 53B on the base surface 51, the die elements 53A, 53B have inclined sliding surfaces 531 A, 531 B facing away from each other, and the recesses 33A, 33B each have a complementary inclined sliding surface 331 A, 331 B, for sliding the inclined sliding surface 531 A, 531 B of the respective die element 53A, 53B during the closing movement of the crimping die 1 and for insertion in the movement direction V A, or VB of the movably arranged matrix elements 53A, 53B into the recesses 33A, 33B. The inclined sliding surfaces 531A, 531B and the complementary inclined sliding surfaces 331A, 331B each have corresponding angles of inclination to allow sliding against one another. As shown in Figure 1, the two inclined sliding surfaces 531A, 531B of the matrix elements 53A, 53B are each coupled to a complementary inclined sliding surface 331A, 331B at the respective recess 33A, 33B via a dovetail guide. In the cross-sectional view shown in Figure 2, a coupling element 533A, 533B runs along each of the sliding surfaces 531A, 531B of the matrix elements 53A, 53B.

[0072] A complementary coupling element 333A, 333B runs along the dovetail guide and is embedded in the recesses 33A, 33B of the complementary sliding surfaces 331A, 331B. The dovetail guide extends along a sliding direction G.

[0073] The dovetail guide created by this design ensures that the distance between the respective sliding surfaces 331A and 531A, or 331B and 531B, remains essentially constant during the closing movement in the closing direction S of the crimping die 3 and during an opening movement of the crimping die 3 against the closing direction S. This prevents the sliding surfaces 331A and 531A, or 331B and 531B, from moving away from each other, while simultaneously allowing them to slide against each other. This ensures that the die elements 53A and 53B are held in place by the crimping die 3 against the direction of movement V, even during the opening movement of the crimping die 3 against the closing direction S. A , or V B , moved away from each other.

[0074] As an alternative to the dovetail guide shown, other solutions are also conceivable, such as a T-slot guide.

[0075] The punch element 31, the two die elements 53A, 53B, and the base 51 each have a pressing surface 311, 535A, 535B, 511. During crimping, a wire end ferrule inserted into the crimping surface 311, 535A, 535B, 511 comes into contact with the crimping die 1, or is crimped by the crimping die 1. In Figure 1, the pressing surfaces 311, 535A, 535B, 511 have a flat, i.e., unstructured, surface. Optionally, the pressing surfaces 311, 535A, 535B, 511 can also have a structured surface, such as a surface with formed rib elements, recesses, or a convex surface.

[0076] Figures 3A to 3E show front views of the crimping die 1 according to Figure 1 with a wire end ferrule 200 inserted during crimping or compression of the wire end ferrule 200. In Figure 3A, the crimping die 1 is shown in an open position, in which the wire end ferrule 200 is arranged on the base surface 51, not yet compressed, between the two die elements 53A, 53B.

[0077] Figures 3B to 3D show the step-by-step closing of the crimping die 1 from the open position in Figure 3A to the closed position in Figure 3E.

[0078] During the closing movement, the two die elements 53A, 53B are moved towards each other by the crimping die 3, or by the sliding of the sliding surfaces 331A and 531A, or 331B and 531B. Simultaneously, the die element 31 is moved further and further between the die elements 53A, 53B, and the inserted wire end ferrule 200 is continuously crimped in the space bounded by the die element 31, the die elements 33A, 33B, and the base surface 51.

[0079] As the crimping die 1 closes, the die elements 53A, 53B are moved further and further into the recesses 33A, 33B until, as shown in Figure 3E, they are completely enclosed in the recesses 33A, 33B in the closed position. The minimum crimpable cross-section is limited by the fact that the punch element 31 must have a certain minimum width to apply the necessary force even for wire ferrules with larger cross-sections. In the closed position, the punch element 31 does not extend to the base 51, but is shortened by a minimum height of the crimped wire ferrule 200. Depending on the cross-section of the wire ferrule 200 to be crimped, the punch element 31 is moved to a different extent towards the base 51, or the crimping die 1 is closed to a different extent. Once a defined crimping force is reached, the crimping die 1 can be opened again.For example, opening upon reaching the defined crimping force can occur automatically via a ratchet element. Figure 4 shows a view of a crimping die 1 with an elastic element 7 designed as a spring. The embodiment shown in Figure 4 differs from the embodiment shown in the previous figures in that the two inclined sliding surfaces 531 A, 531 B of the die elements 53A, 53B are not coupled to their respective complementary inclined sliding surfaces 331 A, 331 B on the punch element 3 via a dovetail guide.

[0080] In Figure 4, an elastic element 7 is arranged between the die elements 53A, 53B. This element is designed to move the die elements 53A, 53B away from each other against the displacement direction VA and VB, respectively, by means of a spring force when the crimping die 1 opens or the crimping punch 3 moves against the closing direction S. The elastic element 7 is connected at one end to a stop surface 536A, 536B of the respective die element 53A, 53B.

[0081] The elastic element 7 can be used alternatively, but also additionally, to couple the sliding surfaces together in order to move the die elements 53A, 53B away from each other during the opening movement of the crimp die 1, in order to enable easy removal of the crimped wire end sleeve.

[0082] Furthermore, the matrix elements 53A, 53B shown in Figure 4 each have a guide element 537A, 537B, which is designed as a guide opening through which the rod-like base 51 extends. This guidance allows the matrix elements 53A, 53B to move towards or away from each other on the base 51 in the direction of extension A of the base 51, but not transversely to the direction of extension A. Figure 4 also shows a limiting element 335 on the base 51, which is larger than the guide openings, so that it cannot be inserted into the guide openings and thus defines a minimum distance between the two matrix elements 53A, 53B.

[0083] Figure 5 shows a view of a crimping tool 100 with a crimping die 1 in an open position. The crimping tool 100 is designed like pliers and has two working points 101 and 103 that can be moved linearly towards each other. A first working point 101 is mechanically connected to the crimping punch 3, and a second working point 103 is mechanically connected to the die 5. The crimping die 1 is interchangeable within the crimping tool 100. Furthermore, the crimping tool 100 shown has a spring element 105, which is designed as a coil spring. The spring element 105 engages a locking mechanism, so that the movement of the handles of the crimping tool 100 is transmitted to the crimping die 1 until the spring force is exceeded and the locking mechanism is released, preventing any further movement of the handles from moving the crimping die 1.

[0084] Figures 6A and 6B show views of a crimping die 1 with a limiting element 335A, 335B. In the embodiment shown, the limiting element 335A, 335B is formed in two parts as surfaces in the recesses 33A, 33B, which in an end position, or in the fully closed position of the crimping die 1, rest on the die elements 53A, 53B to prevent further crimping of the inserted wire end sleeve 200.

[0085] In the embodiment shown in Figures 7A and 7B, the limiting element 335 is depicted as a force measuring device which terminates the pressing process upon detection of a predefined pressing force.

[0086] Figure 8 shows a view of a crimp die 1 with a punch element 31 which is movably arranged on the crimp punch 3.

[0087] In the embodiment shown, the punch element 31 is movably arranged on the crimping punch 3 and is adapted to be moved away from the crimping punch 3 in the direction of the base surface 51 when a movement stop 337 is reached during a movement in the direction of the base surface 51.

[0088] The movement stop 337 shown is designed as a rocker element and is actuated, or pivoted, during a closing movement of the crimping die 1 between the open and closed positions. During further crimping, this causes the punch element 31 to be moved, or extended, from the crimping die 3, as shown in Fig. 10B. Upon reaching the movement stop 337, a further crimping stage is triggered, whereby the punch element 31 is moved from the crimping die 3 towards the base surface 51, thereby narrowing the receiving space for the wire end ferrule.

[0089] Figure 9 shows a view of a crimping die 1 with a movable punch element 31 and an adjustable limiting element 335A. Unlike the embodiment shown previously in Figures 6A and 6B, in which the limiting element 335A is not adjustable, in the embodiment shown in Figure 9 the limiting element 335A can be adjusted by the spindle drive shown, or rather the position of the limiting element 335A relative to the base 51 can be adjusted and thus the end position can be set.

[0090] Figures 10A and 10B show views of an embodiment of a crimping die 1 with a movable punch element 31 and two-part die elements 53A, 53B.

[0091] In the illustrated embodiment, a first part 53AA, 53BA of each of the two-part die elements 53A, 53B is movably arranged on a second part 53AB, 53BB. The first parts 53AA, 53BA can be displaced along the displacement direction VA, VB relative to the respective second parts 53AB, 53BB. When the movement stop is reached during a pressing operation, the movable first parts 53AA, 53BA of the two die elements 53A, 53B are moved towards each other in the further pressing stage, as shown in Figure 10B, in order to further narrow the receiving space for the wire end sleeve in addition to the punch element 31.

[0092] In the illustrated embodiment, a sliding element 339A, 339B is arranged on the crimping die 3 at the edge of each recess 33A, 33B. In this embodiment, the sliding elements 339A, 339B are shown as semicircular material protrusions that displace a respective first part 53AA, 53BA of the die elements 53A, 53B relative to the respective second part 53AB, 53BB as they are moved along the displacement direction VA, VB. As shown in Figures 10A and 10B, the first parts 53AA, 53BA are arranged on the base 51 and are displaced on the base 51 relative to the second parts 53AB, 53BB, which are each arranged in and held in one of the conical recesses 33A, 33B. The crimp die 1 shown in Figure 1 1 differs from the crimp die 1 shown previously in Figures 10A and 10B in that an additional deformation element 515A is arranged in the base area 51.

[0093] The deformation element 515A is designed as a material protrusion in the base surface 51 to make contact with the wire end ferrule during crimping. The crimp, or indentation, created by the deformation element 515A can accommodate the excess material resulting from the crimping process. In the illustrated embodiment, the deformation element 515A is formed integrally with the base surface 51. In further embodiments, the deformation element 515A can be detachably connected to the base surface 51 to allow the use of differently designed deformation elements 515A on a single base surface 51.

[0094] Figures 12A and 12B show views of a crimp die 1 with a fixed deformation element 515A on the base and three extendable deformation elements 515B, 515C, 515D, wherein the three extendable deformation elements 515B, 515C, 515D are extendable from the die elements 53A, 53B and the punch element 31.

[0095] The crimping die 1 is inserted into the crimping tool 100 shown in Figure 5, wherein a first working point 101 of the crimping tool 100 is mechanically connected to the crimping punch 3 and a second working point 103 is mechanically connected to the die 5. As shown in Figures 12A and 12B, the crimping punch 3 is resiliently connected to the first working point 101.

[0096] When the crimping die 1 closes, the deformation elements 515B, 515C, 515D are displaced from the surfaces of the punch element 31 and the die elements 53A, 53B towards an inserted wire end ferrule (not shown), or into the material of the inserted wire end ferrule, as shown in Figure 12B. In the illustrated embodiment, the deformation elements 515B, 515C, 515D are displaced by means of rod-like drive elements that are connected to the first actuating point 101. Reference numeral list

[0097] 1 crimping die

[0098] 3 crimping dies

[0099] 31 Stamp element

[0100] 33A, 33B Recess

[0101] 331 A, 331 B Sliding surface

[0102] 333A, 333B Coupling element

[0103] 335, 335A, 353B Limiting element

[0104] 337 Movement stop

[0105] 339A, 339B Sliding element

[0106] 5 die

[0107] 51 Floor area

[0108] 515A - 515D Deformation element

[0109] 53 A, 53 B Matrix elements

[0110] 53AA, 53AB, 53BA, 53BB First, Second Parts

[0111] 531 A, 531 B Sliding surface

[0112] 533 A, 533 B Coupling element

[0113] 536A, 536B Stop surface

[0114] 537A, 537B Guide element

[0115] 311, 511, 535A, 535B pressing surface

[0116] 7 Elastic element

[0117] 100 crimping tools

[0118] 101, 103 Location

[0119] 105 Springy Body

[0120] 200 wire end ferrules

[0121] A. Direction of expansion

[0122] G Sliding direction S Closing direction

[0123] V A , V B Direction of movement

Claims

Patent claims 1. Crimp die (1) for a crimping tool (100), comprising: a crimping punch (3) having a punch element (31); and a die (5), characterized in that the die (5) has two die elements (53A, 53B), wherein the die elements (53A, 53B) are arranged movably relative to each other on a base surface (51), and the crimping punch (3) is adapted to move the punch element (31) at least partially between the two die elements (53A, 53B) by a closing movement of the crimp die (1) in the direction of the base surface (51), and to move the two die elements (53A, 53B) towards each other.

2. Crimp die (1) according to claim 1, characterized in that the die elements (53A, 53B) have inclined sliding surfaces (531A, 531B) facing away from each other and the crimping punch (3) has a recess (33A, 33B) for each of the die elements (53A, 53B), wherein the recesses (33A, 33B) each have a complementary inclined sliding surface (331A, 331B) for sliding the inclined sliding surface (531A, 531B) of the respective die element (53A, 53B) during the closing movement of the crimp die (1).

3. Crimp die (1) according to claim 2, characterized in that each of the two inclined sliding surfaces (531 A, 531 B) of the die elements (53A, 53B) is coupled to the complementary inclined sliding surface (331 A, 331 B) of the respective recess (33A, 33B), in particular the inclined sliding surfaces (331 A, 531 A, 331 B, 531 B) are coupled via guide elements (537A, 537B).

4. Crimp die (1 ) according to one of claims 2 or 3, characterized in that the punch element (31 ) extends between the two recesses (33A, 33B) in the direction of the base surface (51 ).

5. Crimp die (1 ) according to one of claims 2 to 4, characterized in that both die elements (53A, 53B) and the two corresponding recesses (33A, 33B) are trapezoidal in shape.

6. Crimp die (1 ) according to one of the preceding claims, characterized in that the punch element (31 ), the two die elements (53A, 53B) and the base surface (51 ) each have a pressing surface (31 1 , 51 1 , 535A, 535B), in particular two adjacent pressing surfaces (31 1 , 51 1 , 535A, 535B) extend at an angle of 90° relative to each other.

7. Crimp die (1 ) according to claim 6, characterized in that at least one of the pressing surfaces (311 , 511 , 535A, 535B) has a structured surface, in particular a surface with rib elements or recesses formed thereon, and / or at least one of the pressing surfaces (31 1 , 51 1 , 535A, 535B) has a convex or concave curved surface.

8. Crimp die (1 ) according to one of the preceding claims, characterized by an elastic element (7) which is arranged between the die elements (53A, 53B) and which is adapted to move the die elements (53A, 53B) away from each other during an opening movement of the crimp die (1 ).

9. Crimp die (1 ) according to one of the preceding claims, characterized in that the die elements (53A, 53B) each have a guide element (537A, 537B), wherein the guide elements (537A, 537B) are adapted to guide the die elements (53A, 53B) in and against an expansion direction A of the base surface (51 ) on the base surface (51 ).

10. Crimp die (1 ) according to one of the preceding claims, characterized by a limiting element (335, 335A, 353B) which is adapted to stop a closing movement of the crimp die (1 ) when a defined position of the die elements (53A, 53B) relative to each other is reached, and / or when a defined crimping force is detected. 1 1. Crimp die (1 ) according to one of the preceding claims, characterized by at least one deformation element (515A - 515D) which is arranged on the Stamp element (31) , on at least one of the matrix elements (53A, 53B), or on the base surface (51 ).

12. Crimp die (1 ) according to claim 1 1 , characterized in that the at least one deformation element (515A - 515D) is adapted to be extendable from the punch element (31 ), the die elements (53A, 53B) or the base surface (51 ) during a closing movement of the crimp die (1 ).

13. Crimp die (1 ) according to one of the preceding claims, characterized in that the punch element (31 ) is movably arranged on the crimp die (3) and is adapted to be moved away from the crimp die (3) in the direction of the base surface (51) when reaching a movement stop (337) during a movement in the direction of the base surface (51 ).

14. Crimp die (1 ) according to one of the preceding claims, characterized in that at least one of the die elements (53A, 53B), in particular both die elements (53A, 53B), are designed in two parts, wherein a first part (53AA, 53BA) is movably arranged on a second part (53AB, 53BB), and is adapted to be moved by the punch element (31 ) in the direction of the opposite die element (53A, 53B) when the two die elements (53A, 53B) are moved towards each other.

15. Crimping tool (100), wherein the crimping tool (100) is in particular designed as a crimping hand tool, comprising a crimping die (1 ) according to one of claims 1 to 14.

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