Crimp contact

Abstract

The present disclosure relates to a crimp contact (1) made of a plastically deformable material, comprising a connecting element (2) incorporated into a tubular section (3). The tubular section (3) provides a receiving space (4) adapted to receive a conductor (5) and extends away from the connecting element (2) in the longitudinal direction (x). The tubular section (3) comprises, on the outer side, a first outer surface (6) having a first outer diameter (7) and an adjacent second outer surface (8) having a second outer diameter (9), wherein a transition surface (10) interconnects the first outer surface (6) to the second outer surface (8). On the inside, the tubular section (3) comprises an inner surface (11) having a first inner section (12) arranged adjacent to the end face (13) terminating in the receiving space (14) and an adjacent second inner section (15) corresponding to the second outer surface (8), the second outer diameter (9) being greater than the first outer diameter (7) in the undeformed state and the second outer diameter (7) being less than the first outer diameter (7) in the deformed state. After plastic deformation of the tubular section (3) by the crimping tool, the second inner section (15) protrudes at least partially into the receiving space (14).

Description

Technical Field

[0001] The present disclosure relates to a crimp contact comprising a connecting element and a tubular section and to a method for producing a crimp connection. Background Art

[0002] GB942144A published by Amphenol Borg Electronics Corp. on November 20, 1963 relates to a coaxial electrical connector attached to the end of a coaxial transmission line, the coaxial transmission line having a center conductor encased in a dielectric layer, the dielectric layer being encased by a braided wire layer forming an outer conductor of the transmission line, the connector comprising a generally tubular metal member having, at the end of the transmission line, a thin-walled sleeve inserted between the dielectric layer and the braided wire layer and a ferrule crimped onto the braided wire and compressing the braided wire against the thin-walled sleeve.

[0003] US6976889, published by Yazaki Corp. on December 20, 2005, relates to a method of connecting a terminal to a wire, wherein the core of the wire is inserted into a tubular wire connecting portion of the terminal. The wire connecting portion is crimped in the radial direction of the wire, and the wire connecting portion is uniformly compressed in the radial direction of the wire and over the entire circumference. When the die is rotated by using a rotary swaging machine, the wire connecting portion is uniformly compressed by the die in the radial direction of the wire and over the entire circumference. The wire connecting portion is uniformly compressed in the radial direction of the wire and over the entire circumference, and the outer periphery of the compressed portion of the wire connecting portion has a true circular cross-sectional shape. Summary of the invention

[0004] Known crimping connections are used to attach mechanical elements such as electrical conductors to crimping contacts or connectors. The crimping contact typically comprises a connecting element (such as a pin or a plug) and an actual crimping element (typically a ferrule or a sleeve) that forms a receiving space for the mechanical element. The connecting element can be designed, for example, as a pin (male contact) or a socket (female contact) or another crimping sleeve to connect two cable ends. Before the actual crimping process, the mechanical element such as an electrical conductor is usually arranged in the receiving space of the ferrule or the sleeve. During the crimping process, the material of the crimping element is usually at least partially plastically deformed by a crimping tool to attach, for example, an electrical conductor to the crimping contact.

[0005] In order to allow good plastic deformation of the crimp contacts, cold-formable ductile materials are generally preferred. Especially for electrical connections, connectors made of brass are widely used, as they offer good electrical conductivity and corrosion resistance. In many brass alloys, lead is added, which does not form a solid solution in the matrix of the brass alloy, but is dispersed in particulate form, which has a positive effect on machinability in terms of cutting operations. Due to environmental considerations, lead-free brass alloys are now in demand. To replace lead, silicon is typically added, which improves the free-cutting properties but negatively affects the plastic forming capabilities compared to brass alloys with lead. However, efforts to reduce or completely avoid lead as an alloying component have become a challenge due to new environmental standards, as existing crimp contact geometries have proven to be unsuitable for more brittle and less deformable materials. A typical side effect of crimping operations with less ductile materials and alloys is microcracks.

[0006] It is therefore an object of the present disclosure to provide a crimp contact that can be made of a less ductile material than in the prior art, but still maintains the high performance of the crimp connection.

[0007] The crimping contact according to the present disclosure is usually made of a plastically deformable material. The crimping contact typically includes a connecting element, such as a pin, which is incorporated into a tubular section. The connecting element is preferably made in an integral manner with the tubular section, whereby the tubular section provides a receiving space suitable for receiving a conductor or the like. The crimping contact can be made by one or several cutting operations, whereby the receiving space is usually made as an inner hole. Depending on the field of application, the crimping contact described in more detail below can be, for example, part of a cable connector. The tubular section providing (enclosing) the receiving space is usually designed as a substantially cylindrical hole (before plastic deformation by the crimping tool). Typically, a flat or conical end face typically terminates at the receiving space in the tubular section. Depending on the field of application, other geometric shapes of the tubular section are also possible, such as a hexagonal outer shape. The diameter of the connecting element (e.g., a pin) is typically smaller than the diameter of the first outer surface in an undeformed state. This allows a transition of forces without stress peaks in the transition region.

[0008] The tubular section extends in the longitudinal direction and typically comprises at least one first outer surface having a first outer diameter, which is typically arranged proximally of the connecting element, and an adjacent second outer surface having a second outer diameter. In the undeformed state, the second outer diameter is generally larger than the first outer diameter, as will be explained in more detail below. In a cross-sectional view along the longitudinal direction, the tubular section typically has a staggered design. When the first outer surface and the second outer surface are not merged into each other via a step but via a smooth transition surface interconnecting the first outer surface and the second outer surface, good results can be achieved regarding the stress distribution during deformation and during use in the deformed state. On the inside, the tubular section has an inner surface having a first inner section arranged adjacent to the end face and an adjacent second inner section, the first inner section terminating in a receiving space, the second inner section typically corresponding to the second outer surface. Since the receiving space is typically a cylindrical inner hole in the undeformed state of the crimping contact, the diameter of the first section and the diameter of the second section are typically similar at least before deformation.

[0009] One of the problems with the known geometries of the prior art is that sharp-edged tools can cause microcracks. The sharp transition in the area between the undeformed material and the deformed material caused by the edge of the crimping tool can cause stress peaks. In particular, when the edge of the tool is applied axially close to the end face of the receiving space. The high stresses caused by the edge of the crimping tool engaging the plastically deformable material can lead to cracking in the less ductile material. In order to reduce the stresses and the resulting cracking, the edge of the crimping tool can be designed to be smooth, for example in the form of a chamfer or a radius. However, this necessitates customized and therefore expensive tools.

[0010] Instead of rounding the edges of the tool, the transition surface interconnecting the first outer surface and the second outer surface can be designed as an inclined surface having an outer diameter that merges smoothly from the first outer diameter into the second outer diameter. The gradual increase in the diameter of the transition surface leads to a smoother stress distribution during the crimping process. Good results with respect to stress distribution can be achieved when the proximal end of the second outer surface is spaced from the end face by a distance at least equal to the wall thickness of the tubular section between the second outer surface and the second inner section in the undeformed state. The proximal end of the second outer surface is typically an end arranged proximal to the connecting element in the longitudinal direction. In order to avoid stress peaks at the transition between the end face and the tubular section, the external geometry can be designed so that the first outer surface extends from the connecting element in the longitudinal direction beyond the end face so that the transition surface is spaced a certain distance from the end face.

[0011] The second outer surface is usually the surface to which the crimping tool is mainly applied. Depending on the design of the crimping tool, at least the second outer surface and the transition surface interconnecting the first outer surface with the second outer surface are deformed. The second outer surface may be, for example, cylindrical or barrel-shaped, etc., to provide a suitable contact surface for the crimping tool. In a variation, the overall outer surface of the tubular section is protruding. If appropriate, the second outer surface may be subdivided into several sections. In a variation, the second outer surface may be, for example, separated by an annular groove and / or a concave portion extending in the longitudinal direction. The annular groove may be designed as a groove having, for example, a V-shaped cross-section, which subdivides the second outer surface into two cylindrical surfaces separated by the groove. In a deformed state, after plastic deformation, the material between the two cylindrical surfaces and the inner surface may be deformed into a receiving space configured to form a wavy protrusion. Alternatively or in addition, the first outer surface and the second outer surface may be separated from each other by a concave portion, for example, designed as an annular groove.

[0012] During the crimping process, the second outer surface is typically only partially (locally) deformed in the circumferential direction. The area of ​​the second outer surface in contact with the crimping tool and the material beyond is plastically deformed, which results in a deformation zone. During the deformation, the at least one deformation zone is formed by plastically deforming the material between the second outer surface and the inner surface of the tubular segment. The material is thereby deformed into the receiving space, forming at least one protrusion. In order to attach the conductor to the crimping contact, the protrusions can be formed so that they are pressed into the shell surface of the conductor and thereby form a recess in the shell surface of the conductor. The interaction between the protrusion and the recess produces a form-fitting connection. One of the advantages of this design is that a simple tool can be used, such as a portable tool in the form of a crimping pliers with sharp-edged pressing jaws. Alternatively, instead of locally applying the crimping force on the second outer surface via a crimping tool with at least two pressing jaws, a crimping tool (Hex-Crimp) with a hexagonal-shaped pressing jaw in the closed state can be used. As an alternative to the tool with two pressing jaws, a rotary swage can be applied for crimping the tubular segment.

[0013] A sharp transition with negative effects can be avoided when the at least one deformation zone at the second outer surface is spaced apart from the end face of the receiving space by a first distance, which first distance is preferably at least 50% of the second distance between the second outer surface and the second inner section. Depending on the geometry and the material, this distance can be as small as zero. Good results can be achieved when the deformation zone is deformed into the second outer surface by no more than 50% of the overall deformation of the plastically deformable material between the second outer surface and the second inner section. This ratio corresponds to a third distance between the deformation zone and the first outer surface, which is less than 50% of the fourth distance between the first inner section and the second inner section. The second outer surface is configured to be at least partially deformed in the deformed state after crimping, thereby forming at least one deformation zone, wherein the maximum distance between the at least one deformation zone and the first outer surface is less than 50% of the distance between the at least one deformation zone and the second inner section.

[0014] Good results can be achieved when the transition surface interconnecting the first outer surface and the second outer surface is designed as an inclined surface in the undeformed state. The transition surface can be angled with respect to the longitudinal direction at an angle between 15° and 45°, preferably between 15° and 30°. Typically, the transition surface can have an outer diameter that merges smoothly from the first outer diameter into the second outer diameter. During the usual plastic deformation process, when the sleeve is crimped, the plastically deformable material arranged between the inner section and the outer surface is at least partially deformed. Typically, the crimping tool is applied to the second outer surface and first causes the plastically deformable material between the second outer surface and the second inner section to be deformed radially inwardly at least partially into the receiving space. Depending on the design, the transition surface starting at the proximal end of the second outer surface can merge into the first outer surface at or before the end face beyond the end face.

[0015] The thread and / or at least one annular groove may be arranged at the second inner section. In order to increase the load-bearing capacity of the crimped connection, the thread and / or the annular groove are pressed into the conductor during plastic deformation, whereby a ridge is formed on the shell surface of the conductor which engages with the thread and / or the annular groove. This form-fit connection is particularly beneficial for pull-out forces occurring in the longitudinal direction.

[0016] The method for producing a crimp connection may comprise the following method steps: - providing a crimp contact according to at least one of the preceding claims; Providing a conductor and arranging an end section of the conductor in the receiving space of the tubular section of the crimping contact. - Placing the crimping contact with the end section of the conductor arranged therein in a crimping tool. - applying a crimping force on the second outer surface of the tubular section and thereby deforming the plastically deformable material arranged between the second outer surface and the second inner section of the inner surface at least partially into the receiving space to form a positive connection between the end section of the conductor and the crimping contact. The crimping force is exerted on the second outer surface by at least one crimping jaw of the crimping tool, which crimping jaw forms the at least one deformation zone in the second outer surface.

[0017] Depending on the geometry of the crimping tool, the crimping force can be applied circumferentially distributed or locally on the second outer surface. For a crimping tool consisting of two or more crimping jaws that move radially inwards against each other, the crimping force is typically applied locally on the second outer surface. Therefore, "locally" is to be understood as only partially, resulting in at least partial deformation of the second outer surface, typically in the form of an indentation. Good results can be achieved when the crimping force is applied concentratedly on several different areas of the second outer surface. As a result, in the deformed state, the second inner section in the deformed state generally includes a protrusion that protrudes into the receiving space and increases the form-fitting interconnection.

[0018] In a variant, the crimping tool is designed in such a way that the crimping force can be applied to the second outer surface and the transition surface between the first outer surface and the second outer surface and / or the transition surface between the third outer surface and the second outer surface. In a variant, the crimping force is locally applied to the second outer surface forming the deformation zone by partially engaging the pressure jaws with the second outer diameter. In the deformed state, the shortest distance from the center axis of the crimping contact to the corresponding deformation zone can be equal to the radius of the first outer diameter.

[0019] Good results can be achieved when the crimping tool comprises a crimping jaw with a square cross-section in the closed state. Alternatively, it is also possible to form a crimping jaw with a hexagonal crimping geometry. For a crimping tool with a square or hexagonal cross-section, the tool typically consists of two crimping jaws. Alternatively, a segmented formation can be used for the crimping connection, wherein the tool consists of several radially closed segments. In order to achieve a substantially circular crimping geometry, a rotary swaging tool can be used, whereby a large part of the plastically deformable material arranged between the second outer surface and the second inner segment is deformed by several dies, which rotate relative to the longitudinal direction and evert the plastically deformable material. In addition, in order to fully utilize the increased performance with respect to machinability, the crimping contact can be manufactured entirely by a material cutting process. The crimping contact is typically made from a cylindrical semi-finished product by lathing, whereby the receiving space is made into a countersunk hole, which is arranged in the longitudinal direction after lathing the outer geometry of the tubular section.

[0020] It will be understood that both the foregoing general description and the following detailed description present embodiments and are intended to provide an overview or framework for understanding the nature and character of the present disclosure. The accompanying drawings are included to provide a further understanding and are incorporated into and constitute a part of this specification. The drawings illustrate various embodiments and, together with the description, serve to explain the principles and operation of the disclosed concepts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The disclosure described herein will be more fully understood from the detailed description given herein below and the accompanying drawings, which should not be considered as limiting the disclosure described in the appended claims. In the drawings:

[0022] Figure 1 A first variant of the crimp contact is shown in a partially cut-away perspective view from the front and above in a deformed state;

[0023] Figure 2 Show according to Figure 1 A side view of a first variation of a crimp contact;

[0024] Figure 3 Show according to Figure 2 An enlarged cross-sectional view of a first variation of a crimp contact;

[0025] Figure 4 Figure 4a Perspective view from the front and above and Figure 4b sectional side view in shows a second variation of the crimp contact in an undeformed state;

[0026] Figure 5 Figure 5a Perspective view from the front and above and Figure 5b sectional side view in which a second variation of the crimp contact is shown in a deformed state;

[0027] Figure 6 A second variant of the crimp contact according to FIG. 4 is shown in a partially cutaway perspective view from the front and above;

[0028] Figure 7 A second variant of the crimping contact according to FIG. 5 is shown in a partially cutaway perspective view from the front and above;

[0029] Figure 8 A third variant of the crimp contact is shown in a partially cut-away perspective view from the front and above in an undeformed state;

[0030] Fig. 9 A third variant of the crimp contact is shown in a partially cut-away perspective view from the front and above in a deformed state;

[0031] Figure 10 Fig.10a The front view and Fig.10b 0014 shows a cross-sectional side view of a first variation of a crimping contact in an undeformed state in a crimping tool;

[0032] Figure 11 Fig.11a The front view and Fig.11b 0014] A cross-sectional side view in Figure 1 shows a first variation of a crimping contact in a deformed state in a crimping tool;

[0033] Figure 12 Fig.12a The front view and Figure 12b 0014 shows a cross-sectional side view of a second variation of a crimping contact in an undeformed state in a crimping tool;

[0034] Figure 13 Fig.13a The front view and Fig.13b 0014] A cross-sectional side view in Figure 1 shows a second variation of a crimping contact in a deformed state in a crimping tool;

[0035] Figure 14 Fig.14a The front view and Fig.14b sectional side view in shows a third variation of the crimping contact in an undeformed state in the crimping tool;

[0036] Figure 15 Fig.15a The front view and Fig.15b sectional side view in shows a third variation of the crimping contact in a deformed state in the crimping tool;

[0037] Figure 16 Fig.16a The front view and Fig.16b 0016] A cross-sectional side view in Figure 1 shows a fourth variation of a crimp contact in an undeformed state in a crimping tool;

[0038] Figure 17 Fig.17a The front view and Fig.17b The sectional side view in FIG. 4 shows a fourth variant of a crimping contact in a deformed state in a crimping tool. DETAILED DESCRIPTION

[0039] Reference will now be made in detail to certain embodiments, examples of which are illustrated in the accompanying drawings, in which some, but not all, features are shown. Indeed, the embodiments disclosed herein may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Whenever possible, like reference numerals will be used to refer to like parts or portions.

[0040] Figures 1 to 3A first variant of a crimping contact 1 is shown. The crimping contact 1 shown is made of a plastically deformable material and comprises a connecting element 2 and a tubular section 3 which provides a receiving space 4. The receiving space 4 is configured to receive a conductor 5. The tubular section 3 extends in a longitudinal direction x and comprises on the outside a first outer surface 6 with a first outer diameter 7 and an adjacent second outer surface 8 with a second outer diameter 9. As can be seen from Figure 2 and Figure 3 The second outer surface 8 of the crimping contact 1 shown is obtained to be locally plastically deformed in the circumferential direction by the crimping tool in the deformed state. The deformation zone 19 formed thereby is an indentation in the second outer surface 8. In the variant shown, at least one deformation zone 19 at the second outer surface 8 is spaced apart from the end face 13 of the receiving space 4 by a first distance d1. The first distance d1 of the variant shown is at least 50% of the second distance d2 between the second outer surface 8 and the second inner section 15.

[0041] Figure 4 to Figure 7 A second variant of a crimping contact 1 is shown. The crimping contact 1 shown is also made of a plastically deformable material and further comprises a connecting element 2 and a tubular section 3 which provides a receiving space 4 suitable for receiving a conductor 5. The tubular section 3 extends in the longitudinal direction x and comprises, on the outside, a first outer surface 6 with a first outer diameter 7 and an adjacent second outer surface 8 with a second outer diameter 9. On the inside, the tubular section 3 comprises an inner surface 11 which, in the longitudinal direction x, comprises a first inner section 12 and an adjacent second inner section 15 corresponding to the second outer surface 8. As can be seen from Figure 4b In the best case, the second outer diameter 9 of the tubular section 3 is greater than the first outer diameter 7 in the undeformed state. Figure 5b It is optimally achieved that, in the deformed state, after the plastic deformation of the illustrated crimping contact piece 1 by a crimping tool, the diameter of the second inner section 15 is smaller than the diameter of the first inner section 12 .

[0042] If available from Figure 6 and Figure 7It is obtained that, in order to be able to attach the conductor 5, the receiving space 4 is suitable for receiving the end section of the conductor 5. The receiving space 4 is made as a countersunk hole, which is arranged in the longitudinal direction x after lathing the outer geometry of the tubular section 3. The first inner section 12 of the inner surface 11 is arranged adjacent to the end face 13, which defines the receiving space 4 in the longitudinal direction x. In the undeformed state, the second outer diameter 9 is greater than the first outer diameter 7, and the diameter of the second inner section 15 is equal to or smaller than the diameter of the first inner section 12. The transition surface 10 interconnects the first outer surface 6 and the second outer surface 8. In the variant shown, the transition surface 10 is designed as an inclined surface, which is angled at an angle of between 15° and 45°, preferably between 15° and 30°, relative to the longitudinal direction x. As can be seen from Figure 7 The resulting crimping force is preferably applied locally on the second outer surface 8 forming the deformation zone 19 by, for example, a pressing claw 25 engaging with the second outer surface 8. In the deformed state, the deformation zone 19 is an indentation in the second outer surface 8 and a protrusion 16 at the inner surface 11, which protrudes into the receiving space 4. Protrusion 16.

[0043] Figure 8 and Fig. 9 A third variant of the crimping contact 1 is shown. Similar to the first and second variants, the tubular section 3, the first outer surface 6 and the second outer surface 8 are arranged adjacent to each other along the longitudinal direction x and merge into each other. The second inner section 15 is arranged adjacent to the first inner section 12, which second inner section 15 corresponds to the second outer surface 8. As can be seen from Figure 8 The second outer surface 8 of the variant shown is designed as a cylindrical surface, which is subdivided into several sections by an annular groove 26 or, alternatively or additionally, by a recess extending in the longitudinal direction x. The annular groove 28 is designed as a substantially V-shaped groove, which subdivides the second outer surface 8 into two equal cylindrical surfaces. The first inner section 10 shown merges into an end face 25, which delimits the receiving space 4 in the longitudinal direction x.

[0044] 10 to 17 show a crimping method with various variants of the crimping contact 1. In all variants, the crimping force is applied primarily to the second outer surface 8 of the crimping contact 1, so that in the deformed state, the first outer surface 6 remains substantially undeformed, while the plastically deformable material arranged between the second inner section 15 and the second outer surface 8 is at least partially deformed into the receiving space 4. In order to produce a crimped connection, a conductor 5 is provided, and an end section of the conductor 5 is arranged in the receiving space 4 of the provided crimping contact 1. In order to crimp the conductor 5 to the crimping contact 1, a tubular section 3 with the end section of the conductor 5 arranged therein is placed in a crimping tool 24. A crimping force is applied to the second outer surface 8 of the tubular section 3, whereby the plastically deformable material arranged between the second outer surface 8 and the second inner section 15 is at least partially deformed into the receiving space 4 to form a positive connection between the end section of the conductor 5 and the crimping contact 1.

[0045] As can be obtained from FIGS. 10 and 11 , a sharp transition can be avoided when at least one deformation zone 19 at the second outer surface 8 is spaced apart from the end face 13 of the receiving space 4 by a first distance d1. The first distance d1 is preferably at least 50% of the second distance d2 between the second outer surface 8 and the second inner section 15. The deformation zone 19 shown is deformed into the second outer surface 8 by no more than 50% of the overall deformation of the plastically deformable material between the second outer surface 8 and the second inner section 15. As can be obtained from FIGS. 12 and 13 , the difference between the first variant and the second variant is essentially the degree of plastic deformation. While in the first variant the plastically deformable material is deformed so as to produce an indentation in the second outer surface 8, in the second variant the plastically deformable material is deformed only in such a way that the deformation zone 19 merges into the first outer surface 6.

[0046] As can be best seen from FIGS. 14 and 15 , the second outer surface 8 of the variant shown is cylindrical and subdivided into several sections. The second outer surface 8 is divided by an annular groove 20. The annular groove 20 is designed as a groove having, for example, a V-shaped cross section, which subdivides the second outer surface into two cylindrical surfaces separated by the groove 20. As can be seen from FIG. 15 , in the deformed state after plastic deformation, the inner surface 11 has a wavy shape. This form-fit connection between the deformed inner surface 11 and the conductor 5 is beneficial for the pull-out forces occurring along the longitudinal direction x. As can be seen from FIGS. 16 and 17 , in order to further increase the crimping effect, the tubular section 3 may include a thread 22 and / or an annular groove arranged at the second inner section 15. In the deformed state, the thread 22 and / or the annular groove are pressed into the conductor 5, whereby, by plastic deformation of the shell surface of the conductor 5, a ridge is formed that engages with the thread 22 and / or the annular groove. This form-fit connection is also beneficial for the pull-out forces occurring along the longitudinal direction.

[0047] Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.

[0048] Name List 1Crimp contact 2 Connecting elements 3 tubular sections 4. Accepting space 5 Conductors 6 First external surface 7First outer diameter 8 Second external surface 9 Second outer diameter 10 Transition Surface 11Inner Surface 12 first inner section 13 End face 14. Accepting Space 15 Second inner section 16 protrusion 17 proximal end (second outer surface) 18 Diameter (connecting element) 19 Deformation Zone 20 annular groove 21 recess 22 thread 23 end section (conductor) 24 Crimping tools 25 pressure claws.

Claims

1. A crimping contact (1) made of a plastically deformable material, comprising a connecting element (2) which is incorporated into a tubular section (3) which provides a receiving space (4) suitable for receiving a conductor (5), a. The tubular section (3) extends away from the connecting element (2) in the longitudinal direction (x) and comprises: i. a first outer surface (6) having a first outer diameter (7) and an adjacent second outer surface (8) having a second outer diameter (9) on the outer side, wherein a transition surface (10) interconnects the first outer surface (6) to the second outer surface (8), and ii. an inner surface (11) on the inner side, the inner surface (11) having a first inner section (12) arranged adjacent to an end surface (13) terminating in the receiving space (14) and an adjacent second inner section (15) corresponding to the second outer surface (8), wherein 1. In the undeformed state, the second outer diameter (9) is larger than the first outer diameter (7), and 2. In the deformed state, after the plastic deformation of the tubular section (3) by the crimping tool, the second inner section (15) at least partially protrudes into the receiving space (14).

2. The crimping contact (1) according to claim 1, characterized in that The transition surface (10) is designed as an inclined surface in the undeformed state, and the inclined surface has an outer diameter that merges smoothly from the first outer diameter (7) into the second outer diameter (9).

3. The crimping contact (1) according to claim 1 or 2, characterized in that: The second outer surface (8) is cylindrical or barrel-shaped.

4. The crimp contact (1) according to at least one of the preceding claims, characterized in that The plastically deformable material between the second outer surface (8) and the second inner section (15) is configured to deform at least partially radially inwardly into the receiving space (14) during crimping.

5. The crimping contact (1) according to claim 4, characterized in that In the deformed state, the second inner section (15) of the inner surface (11) comprises a projection (16) which projects into the receiving space (14), the receiving space (14) being configured to attach the conductor (5) arranged therein by a form-fitting connection.

6. Crimp contact (1) according to at least one of the preceding claims, characterized in that The proximal end (17) of the second outer surface (8) is spaced apart from the end surface (13) by a distance (d1) which is at least equal to the wall thickness of the tubular section (3) between the second outer surface (8) and the second inner section (15) in the undeformed state.

7. Crimp contact (1) according to at least one of the preceding claims, characterized in that The first outer surface (6) extends from the connecting element (2) beyond the end surface (13) in the longitudinal direction (x) such that the transition surface (10) is spaced apart from the end surface (13) by a distance (d2).

8. The crimp contact (1) according to at least one of the preceding claims, characterized in that The diameter (18) of the connecting element is at least 20% shorter than the diameter (6) of the first outer surface in the undeformed state.

9. The crimp contact (1) according to at least one of the preceding claims, characterized in that The second outer surface (8) is configured to be at least partially deformed in the deformed state after crimping, thereby forming at least one deformation zone (19), wherein the maximum distance (d3) between the at least one deformation zone (19) and the first outer surface (6) is less than 50% of the distance (d4) between the at least one deformation zone (19) and the second inner segment (15).

10. The crimp contact (1) according to at least one of the preceding claims, characterized in that The second outer surface (8) is separated in the undeformed state by an annular groove (20) and / or recess extending in the longitudinal direction (21).

11. The crimp contact (1) according to at least one of the preceding claims, characterized in that A thread (22) and / or at least one annular groove is arranged on the second inner section (15).

12. The crimp contact (1) according to at least one of the preceding claims, characterized in that The crimping contact (1) is produced by a material removal process.

13. A method for producing a crimp connection, comprising the following method steps: a. Providing a crimping contact (1) according to at least one of the preceding claims; b. providing a conductor (5) and arranging the end section (23) of the conductor (5) in the receiving space (4) of the tubular section (3) of the crimping contact (1); c. placing the crimping contact (1) with the end section (23) of the conductor (5) arranged therein in a crimping tool (24); d. applying a crimping force on the second outer surface (8) of the tubular section (3), thereby causing the plastically deformable material arranged between the second outer surface (8) and the second inner section (15) of the inner surface (11) to be at least partially deformed into the receiving space (4) to form a form-fitting connection between the end section of the conductor (23) and the crimping contact (1).

14. Method for producing a crimp connection according to claim 13, characterized in that The crimping force is applied to the second outer surface (8) by at least one crimping jaw (25) of the crimping tool (24), the crimping jaw (25) forming the at least one deformation zone (19) in the second outer surface (8).

15. Method for producing a crimp connection according to at least one of claims 13 or 14, characterized in that The crimping tool (24) comprises at least one crimping jaw (25) having a square or hexagonal cross section in a closed state.

16. Method for producing a crimp connection according to claim 13, characterized in that The crimp connection is produced by rotary swaging.

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