A crimping cavity structure, a crimping die and a crimping device

Abstract

The application provides a crimping cavity structure, a crimping die and a crimping device. The crimping cavity structure is used for clamping a to-be-pressed part in a wire clamp. The wire clamp comprises a first to-be-pressed area and a second to-be-pressed area with a protruding part. The crimping cavity structure is formed by two die molds and comprises a first crimping area and a second crimping area which is symmetrical to the first crimping area and has the same shape. The first crimping area surrounds the first to-be-pressed area and the second to-be-pressed area of the wire clamp and comprises a first curved section and a tightening section. The first curved section is matched with the shape of the first to-be-pressed area opposite to it. The tightening section is matched with the shape of the second to-be-pressed area opposite to it and comprises a protruding section matched with the protruding part. The crimping cavity structure, the first curved section and the protruding section are matched with the shape of the first crimping area and the protruding section of the wire clamp. When the wire clamp is pressed, the force transmission path of the pressure is relatively reasonable. The protruding section can limit the flow of the wire clamp. The force distribution of the wire clamp is accurate, so that the wire clamp and the to-be-pressed part are seamlessly attached.

Description

Technical Field

[0001] This application relates to the field of electrical connection technology, and discloses a crimping cavity structure, crimping mold, and crimping device. Background Technology

[0002] In railway overhead contact system, the reliable fixing of U-shaped pins, contact wires, and electrical connection wires directly affects power supply safety and line stability. Currently, a special pressing die is used to crimp the electrical connection wire clamps. The die has a crimping cavity structure; during operation, two dies close, applying radial pressure to the clamp, causing it to contract inward and fixing the U-shaped pins, contact wires, and electrical connection wires together.

[0003] The low shape adaptability of the crimping cavity structure in the related technology crimping mold and the unreasonable distribution of pressure transmission path result in uneven stress state of the wire clamp during the crimping process. After crimping, local gaps are likely to appear between the wire clamp and the U-shaped pin, the contact wire and the electrical connection wire, which cannot meet the railway standard requirement of "seamless" crimping section.

[0004] Therefore, there is an urgent need for a pressing cavity structure, pressing mold, and pressing device to solve the above-mentioned technical problems. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a pressing cavity structure, a pressing mold, and a pressing device to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, in a first aspect, this application provides a crimping cavity structure for clamping a component to be crimped onto a wire clamp; the wire clamp includes a first crimping area and a second crimping area having a protrusion, and the crimping cavity structure is formed by two opposing surfaces of a crimping die; the crimping cavity structure includes: The first pressing zone includes the first curved section and the tightening section; The first crimping area surrounds a portion of the first area to be crimped and the second area to be crimped. The first curved segment is adapted to the outer contour shape of the first area to be pressed toward the first curved segment, and the tightening segment is adapted to the outer contour shape of the second area to be pressed toward the tightening segment. The tightening segment includes a protruding segment adapted to the protrusion. And a second crimping area symmetrically arranged with respect to the first crimping area, the second crimping area having the same shape as the first crimping area.

[0007] As a preferred technical solution for the crimping cavity structure, the first crimping area further includes a linear segment. The first curved segment and the tightening segment are located on both sides of the linear segment. When the two molds are closed, in the first crimping area and the second crimping area, the first curved segment and the linear segment apply the first force to the first area to be crimped, and the tightening segment and the linear segment apply the second force to the second area to be crimped, so that the wire clamp presses the part to be crimped.

[0008] As a preferred technical solution for the press-fit cavity structure, the direction of the symmetry line of the press-fit cavity structure is perpendicular to the pressing direction of the two press dies.

[0009] As a preferred technical solution for the press-fit cavity structure, the first force is a press-fit force toward the first area to be pressed; the second force is a press-fit force toward the second area to be pressed.

[0010] As a preferred technical solution for the crimping cavity structure, the linear segment is parallel to the symmetry line of the wire clamp, or the extension line of the linear segment intersects the symmetry line of the wire clamp.

[0011] As a preferred technical solution for the crimped cavity structure, when the extension line of the linear segment intersects the symmetrical line of the wire clamp, the angle between the two intersections is less than 15°.

[0012] As a preferred technical solution for the crimping cavity structure, the part to be crimped includes a first crimping part, which is assembled in the first crimping area, and the wire clamp is placed inside the crimping cavity structure; The curvature of the first curve segment is equal to the curvature of the first pressure zone. When the two pressure molds are closed, the first pressing member presses against the first pressure zone.

[0013] As a preferred technical solution for the crimping cavity structure, the component to be crimped includes a second clamping component and a third clamping component clamped to the wire clamp; the wire clamp is placed inside the crimping cavity structure. The tightening section also includes a second curved section connected to the protruding section, the second curved section surrounding a portion of the second clamping member, and the second curved section being adapted to the outer contour shape of the second clamping member toward the second curved section.

[0014] As a preferred technical solution for the crimping cavity structure, the component to be crimped includes a second clamping component and a third clamping component clamped to the wire clamp; the wire clamp is placed inside the crimping cavity structure. The tightening section also includes a second curved section connected to the protruding section, the second curved section surrounding a portion of the second clamping member, and a gap is left between the second curved section and the outer contour of the second clamping member facing the second curved section.

[0015] As a preferred technical solution for the crimping cavity structure, the component to be crimped includes a second clamping component and a third clamping component clamped to the wire clamp; the wire clamp is placed inside the crimping cavity structure. The tightening section further includes a second curved section connected to the protruding section. The second curved section surrounds a portion of the second clamping member. The protruding section and the second curved section are connected by an inner convex section. The inner convex section is adapted to the outer contour shape of the transition between the wire clamp and the second clamping member toward the tightening section. It is used to apply a force toward the wire clamp along a symmetrical line.

[0016] As a preferred technical solution for the crimped cavity structure, the specifications of the wire clamp include at least 90° wire clamps and 40° wire clamps.

[0017] Secondly, this application provides a pressing mold, including the above-mentioned pressing cavity structure; the pressing mold includes two pressing molds, which enclose the pressing cavity structure.

[0018] Thirdly, this application provides a crimping device, including the aforementioned crimping die; and The driving unit and the fixing unit are provided. The fixing unit is used to fix one of the pressing molds. The driving unit is connected to the other pressing mold and is used to bring the two pressing molds close together so that the wire clamp can clamp and fix the part to be pressed.

[0019] The press-fit cavity structure of this application has the following technical advantages: 1. In the crimping cavity structure of this application, in the first crimping area and the second crimping area, the first curved segment shapes the first area to be crimped in the wire clamp, and the tightening segment shapes the second area to be crimped. In particular, the protruding segment is adapted to the protruding part of the wire clamp, and the multiple crimping surfaces of the protruding segment are located on the periphery of the multiple outer peripheral surfaces of the protruding part. When the mold is closed, the crimping cavity structure can apply force to multiple positions of the wire clamp. The setting of the first curved segment and the protruding segment is adapted to the shape of the wire clamp. When the wire clamp is compressed and undergoes plastic deformation, the force transmission path of the wire clamp is relatively reasonable, the clamping effect of the part to be crimped is better, and the wire clamp and the part to be crimped are seamlessly fitted.

[0020] 2. The pressing cavity structure is designed with raised sections corresponding to the raised parts, so that the cavity surface of the pressing mold is not a continuous curved surface. When the mold is closed, the raised sections can restrict the flow of the wire clamp, reduce the wire clamp deviation, reduce the degree of inaccurate force distribution when the wire clamp is pressed, and make the wire clamp and the workpiece to be pressed seamless. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the pressing cavity structure of a pressing die in related technologies; Figure 2 This is a schematic diagram illustrating the assembly of a crimping cavity structure and a matching wire clamp, provided in an embodiment of this application. Figure 3 This is a schematic diagram of a compression cavity structure provided in an embodiment of this application; Figure 4 An assembly diagram of another crimping cavity structure and a matching wire clamp provided in an embodiment of this application; Figure 5 This is a schematic diagram of another compression cavity structure provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the 40° wire clamp provided in the embodiment of this application; Figure 7 A schematic diagram of the structure for clamping a 40° wire clamp and a component to be clamped, provided in an embodiment of this application. Figure 8 This is a schematic diagram of the structure of the 90° wire clamp provided in the embodiment of this application; Figure 9 This is a schematic diagram of the structure for clamping a 90° wire clamp and a component to be clamped, as provided in an embodiment of this application.

[0023] Figure label: 100. Pressing mold; 102. Wire clamp; 1021. First pressing area; 1022. Second pressing area; 10221. Protrusion; 103. First clamping element; 104. Second clamping element; 105. Third clamping element; 1. First curved segment; 2. Linear segment; 3. Tightening segment; 31. Second curved segment; 32. Protruding segment; 33. Inwardly convex segment. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] As described in the background section, in railway catenary systems, the reliable fixing of U-shaped pins, contact wires, and electrical connection wires directly affects power supply safety and line stability. Figure 1 As shown, the design of the crimping cavity structure in the related technology crimping mold has shortcomings. The geometry of the crimping cavity structure has low compatibility with the wire clamp 102, and the pressure transmission path distribution is unreasonable. This will result in the wire clamp 102 not receiving full force during the compression and tightening process, and the force on the circumferential surface will be uneven. After crimping, gaps will exist between the wire clamp 102 and the U-pin, and between the contact wire and the electrical connection wire. The crimping mold includes a first mold and a second mold, which together form the crimping cavity structure in the related technology.

[0027] The related technology's medium-pressure cavity structure has the following specific problems: Firstly, the pressing cavity structure of the relevant technical pressing mold is usually designed as a symmetrical arc surface or an approximately circular structure, which has a low compatibility with the shape of the wire clamp 102 and does not take into account the plastic deformation law of the wire clamp 102 under pressure. This results in an unreasonable distribution of pressure transmission path when the wire clamp 102 is under pressure, and the clamping degree of the wire clamp 102 on the U-pin, contact wire and electrical connection wire at different positions varies significantly, forming axial and radial gaps.

[0028] Secondly, the inner surface of the crimping cavity structure in related technologies is mostly a smooth and continuous curved surface. During the crimping process, the wire clamp 102 will flow. The surface of the crimping cavity structure cannot restrict the flow direction of the wire clamp 102, causing the wire clamp 102 to easily flow towards the opening or both ends of the cavity. When the wire clamp 102 is under pressure, due to inaccurate force distribution, there will be problems such as end deformation transition and insufficient plasticity in the middle, resulting in gaps after crimping.

[0029] To solve the above technical problems, this application provides a crimping cavity structure.

[0030] like Figures 2 to 9 As shown, in some optional embodiments, the crimping cavity structure in this application is used to fix the part to be crimped in the wire clamp 102. In this application, the part to be crimped may include a first crimping member 103, a second crimping member 104, and a third crimping member 105, wherein the first crimping member 103 may be an electrical connection wire, the second crimping member 104 may be a contact wire, and the third crimping member 105 may be a U-shaped pin.

[0031] like Figures 6-9 As shown, according to the shape of the wire clamp 102, the wire clamp 102 includes a first pressing area 1021 and a second pressing area 1022, and the second pressing area 1022 includes a protrusion 10221. The wire clamp 102 can be a symmetrical structure; in this application, the dotted line B is the line of symmetry of the wire clamp 102. The crimping cavity structure in this application can be formed by the opposing surfaces of two molds 100, specifically by grooves provided on the opposing surfaces of the two molds 100. Of the two molds 100, one mold 100 can be fixed, and the other mold 100 moves closer to the fixed mold 100 via a pusher. When the two molds 100 are closed, the crimping cavity structure can shape the wire clamp 102, clamping and fixing the electrical connection wire, contact wire, and U-pin to the wire clamp 102. The pushing component can be a cylinder, a hydraulic cylinder, or an electric extension rod, as long as it can move one die 100 towards another fixed die 100; no specific restrictions are placed here. The two dies 100 are designated as the first die and the second die. The first die can remain fixed, while the second die can be moved towards the first die via the pushing component.

[0032] The wire clamp 102 has a symmetrical structure. In this application, as shown... Figures 2-5 As shown, the crimping cavity structure may include a first crimping area and a second crimping area symmetrically arranged with respect to the first crimping area. The second crimping area has the same shape as the first crimping area. In this application, the dotted line A is the line of symmetry of the crimping cavity structure formed after the two molds 100 are closed. The first crimping area surrounds a portion of the first area to be crimped 1021 and the second area to be crimped 1022. The second crimping area is symmetrical to the first crimping area. The wire clamp 102 is placed in the crimping cavity structure. After mold closure, the first and second crimping areas surround the wire clamp 102 and the part to be crimped, so that the two molds 100 clamp the wire clamp 102 and the part to be crimped.

[0033] The first pressing area includes a first curved segment 1 and a tightening segment 3. The first curved segment 1 is adapted to the outer contour shape of the first pressing area 1021 facing the first curved segment 1. The tightening segment 3 is adapted to the outer contour shape of the second pressing area 1022 facing the tightening segment 3. The tightening segment 3 includes a protruding segment 32, and the protruding segment 32 and the protruding part 10221 are adapted to each other. Since the second pressing area in the pressing cavity structure of this application has the same shape as the first pressing area, the second pressing area includes two pressing segments symmetrical to the first curved segment and the tightening segment in the first pressing area. The naming of the two pressing segments in the second pressing area can be the same as the naming of the first curved segment and the tightening segment in the first pressing area, or it can be different. In this application, the two pressing segments in the second pressing area are also named the first curved segment and the tightening segment, and are symmetrical to the first curved segment and the tightening segment on the first pressing area. Similarly, in this application, the multiple crimping segments in the second crimping area that correspond to those in the first crimping area are named in the same way as the multiple crimping segments in the first crimping area.

[0034] During mold closing, in the first and second pressing areas, the first curved segment 1 presses against the outer periphery of the first pressing area 1021, and the shape is adapted. When the area of ​​the first pressing area 1021 in the wire clamp 102 is pressed and shaped by the pressing cavity structure, the pressure transmission path of the first pressing area 1021 is rationalized. In this application, the first pressing member 103 is assembled in the first pressing area 1021, which is arc-shaped. After mold closing, the first pressing area 1021 and the first pressing member 103 will be pressed and shaped into a teardrop shape. The wire clamp 102 fastens and presses the first pressing member 103, that is, the wire clamp 102 fastens and presses the electrical connection wire. Similarly, during mold closing, in the first and second pressing areas, the tightening section 3 is located on the periphery of the second pressing area 1022 and is provided with a protruding section 32 that matches the protruding part 10221. After mold closing, the protruding section 32 surrounds the protruding part 10221, and the multiple pressing surfaces of the protruding section 32 will press the outer peripheral surface of the protruding part 10221, applying force to the protruding part 10221 to shape it, so that the side of the wire clamp 102 that is pressed is tightened in the direction of its symmetrical line, clamping the contact wire and the U-pin.

[0035] In the crimping cavity structure of this application, when the two pressing molds 100 are closed, in the first pressing area and the second pressing area, the first curved segment 1 shapes the first pressing area 1021 of the wire clamp 102, and the tightening segment 3 shapes the second pressing area 1022. The multiple pressing surfaces of the protruding segment 32 surround the multiple outer peripheral surfaces of the protruding part 10221. Through this crimping cavity structure, forces can be applied to multiple positions of the wire clamp 102. The setting of the first curved segment 1 and the protruding segment 32 is adapted to the shape of the wire clamp 102. When the wire clamp 102 is compressed and undergoes plastic deformation, the force transmission path of the wire clamp 102 is relatively reasonable, resulting in a better clamping effect on the part to be pressed and achieving a seamless fit between the wire clamp 102 and the part to be pressed. On the other hand, the crimping cavity structure, by setting a protruding section 32 corresponding to the protrusion 10221, makes the cavity surface a non-continuous curved surface. When the mold is closed, the protruding section 32 can restrict the flow of the wire clamp 102, reduce the deviation of the wire clamp 102, reduce the degree of inaccurate force distribution when the wire clamp 102 is pressed, and make the wire clamp 102 and the part to be crimped seamless.

[0036] In some optional embodiments, the first pressing area of ​​this application further includes a linear segment 2, with the first curved segment 1 and the tightening segment 3 located on both sides of the linear segment 2. Similarly, the second pressing area also includes a linear segment 2. When the two molds 100 are closed, in the first pressing area and the second pressing area, the first curved segment 1 and the linear segment 2 apply a first force to the first pressing area 1021, and the tightening segment 3 and the linear segment 2 apply a second force to the second pressing area 1022, so that the clamp 102 presses the part to be pressed. Specifically, the side of the first curved segment 1 and the linear segment 2 connected to the first curved segment 1 applies the first force to the first pressing area 1021. The side of the tightening segment 3 and the linear segment 2 connected to the tightening segment 3 applies the second force to the second pressing area 1022.

[0037] The crimping cavity structure in this application connects the linear segment 2 to the first curved segment 1 and the tightening segment 3, with the first curved segment 1 and the tightening segment 3 located on the periphery of both ends of the wire clamp 102. On one hand, when the two molds 100 are closed, in the first and second crimping areas, the first curved segment 1 applies a first force to the outer periphery of the first crimping area 1021 of the wire clamp 102. The linear segment 2, supported in the middle position of the wire clamp 102, applies a first force to the portion of the first crimping area 1021 not surrounded by the first curved segment 1. The tightening segment 3 applies a second force to the outer periphery of the second crimping area 1022 of the wire clamp 102, and the linear segment 2 applies a second force to the portion of the second crimping area 1022 not surrounded by the tightening segment 3, thus achieving… The current wire clamp 102 can be shaped under force from all directions, and the pressure transmission path is more rational when the wire clamp 102 is pressed, so that the wire clamp 102 and the part to be pressed are "seamlessly" fitted. On the other hand, when the two molds 100 close and the wire clamp 102 is pressed, the linear segment 2 in the first and second pressing areas can restrict the flow of the wire clamp 102, reduce the magnitude of the flow deviation of the wire clamp 102 when pressed, improve the accuracy of the pressure application position of the pressing cavity structure on the wire clamp 102 when pressed, reduce the risk of the end of the wire clamp 102 being plasticized too much and the middle area being plasticized too little, so that the wire clamp 102 and the U-pin, contact wire and electrical connection wire can meet the "seamless" requirement after pressing.

[0038] In some optional embodiments, the crimping cavity structure of this application can be adapted to both vertical and horizontal crimping methods. Regarding the vertical crimping method, two crimping molds 100 are arranged opposite each other. In the first and second crimping areas, the first curved segment 1 and the linear segment 2 are located in one crimping mold 100, and the tightening segment 3 is located in the other crimping mold 100. After the two crimping molds 100 are closed, a vertical crimping cavity structure is formed. Regarding the horizontal crimping method, two crimping molds 100 are arranged opposite each other. The groove shape of one crimping mold is consistent with the shape of the first crimping area, and the groove shape of the other crimping mold is consistent with the shape of the second crimping area. The two crimping molds 100 are vertically opposite each other, and after closing, a horizontally placed crimping cavity structure is formed. The crimping cavity structure in this application, whether located in a vertical or horizontal crimping mold 100, allows the linear segment 2 to apply localized force to the wire clamp 102 when the two molds 100 are closed. This ensures that the wire clamp 102 is fully compressed and shaped during crimping, resulting in a seamless fit between the wire clamp 102 and the part to be crimped. Furthermore, regardless of whether the crimping is vertical or horizontal, the linear segment 2 and the protruding segment 32 restrict the flow of the wire clamp 102 during crimping, reducing its misalignment and ensuring accurate application of external pressure to guarantee the crimping effect.

[0039] In some optional embodiments, the direction of the symmetry line of the crimping cavity structure in this application is perpendicular to the crimping direction of the two molds 100. The first crimping area and the second crimping area in the crimping cavity structure are respectively set on the opposite surfaces of the two molds 100. The wire clamp 102 is placed in the crimping cavity structure. When the mold is closed, the crimping cavity structure simultaneously crimps the first crimping area 1021 and the second crimping area 1022 of the wire clamp 102. During crimping, the first crimping area 1021 and the second crimping area 1022 of the wire clamp 102 are simultaneously pressed, avoiding the problem of the wire clamp 102 flowing or deviating when it is crimped, and further ensuring that the crimped wire clamp 102 and the part to be crimped can fit together without gap.

[0040] In some optional embodiments, the first force is a crimping force toward the first pressure-receiving area 1021, and the second force is a crimping force toward the second pressure-receiving area 1022. Since the wire clamp 102 needs to be compressed and shaped at different locations when compressed, the area of ​​application and the direction of the applied force are not consistent. Therefore, in this application, the first pressure-receiving area 1021 and the second pressure-receiving area 1022 of the wire clamp 102 are used as a distinction. The crimping force acting on the first pressure-receiving area 1021 is named the first force and denoted as F1, and the crimping force acting on the second pressure-receiving area 1022 is named the second force and denoted as F2.

[0041] During the research and development process, the inventors of this application discovered that the included angles of the extended lines of the two sidewalls at the open end of the wire clamp 102 differ for wire clamps of different specifications. If the linear segment 2 connects the first curved segment 1 and the tightening segment 3 only in a horizontal state, a portion of the tightening segment 3 is difficult to process, leading to processing difficulties in the crimping cavity structure. For example, Figures 6-9 As shown, the specifications for clamp 102 include at least a 90° clamp and a 40° clamp.

[0042] In some alternative embodiments, such as Figures 2-5As shown, in the crimping cavity structure of this application, taking the shape of the first crimping area as an example, the linear segment 2 is parallel to the symmetry line of the wire clamp 102, or the extension line of the linear segment 2 intersects the symmetry line of the wire clamp 102. Regarding the layout of the linear segment 2, when the angle between the extended lines of the open end sidewall of the crimped wire clamp 102 is 90 degrees, i.e., the wire clamp 102 is a 90° wire clamp, the endpoints of the first curved segment 1 and the tightening segment 3 can be designed to be nearly opposite each other, and the linear segment 2 can connect the first curved segment 1 and the tightening segment 3 in a horizontal state. When the angle between the extended lines of the open end sidewall of the crimped wire clamp 102 is 40 degrees, i.e., the wire clamp 102 is a 40° wire clamp, the endpoints of the first curved segment 1 and the tightening segment 3 can be designed to be staggered, and the linear segment 2 can be designed so that its extension line intersects the central axis of the wire clamp 102, connecting the first curved segment 1 and the tightening segment 3. Different crimping cavity structures are designed according to different wire clamp 102 structures, which makes it easier to process the cavity. In this application, the shape of the second crimping area is symmetrical to and consistent with the shape of the first crimping area.

[0043] In some alternative embodiments, when the extension of the linear segment 2 intersects the symmetrical line of the clamp 102, the angle between the two intersections is less than 15°. If the angle is too large, it will affect the coverage area of ​​the first curved segment 1 surrounding the first pressure area 1021, or the coverage area of ​​the tightening segment 3 surrounding the second pressure area 1022. These problems will affect the area of ​​the clamp 102 that is compressed and shaped when under pressure, resulting in the clamping parts assembled in the first pressure area 1021 or the second pressure area 1022 not being securely clamped and fixed by the clamp 102. After crimping, gaps will appear between the clamp 102 and the U-pin, contact wire, and electrical connection wire. By designing the angle to be less than 15 degrees, the inclination of the linear segment 2 relative to the symmetrical line of the clamp 102 is relatively small, ensuring that the coverage area of ​​the first curved segment 1 surrounding the first pressure area 1021 and the coverage area of ​​the tightening segment 3 surrounding the second pressure area 1022 are both within a reasonable range.

[0044] In some optional embodiments, the component to be pressed includes a first pressing component 103, which is assembled in the first pressing area 1021. During crimping, the wire clamp 102 is placed in the crimping cavity structure. The first pressing area 1021 of the wire clamp 102 has a central hole. The first pressing component 103 can be an electrical connecting wire, which passes through the central hole. When the wire clamp 102 is compressed and shaped, the electrical connecting wire is pressed into the central hole. After crimping is completed, the first pressing area 1021 is compressed into a teardrop shape. In the first and second pressing areas, the curvature of the first curved segment 1 is equal to the radius of curvature of the first pressing area 1021. When the two molds 100 are closed, the first pressing area 1021 in the wire clamp 102 is shaped by the first curved segment 1 of the two pressing areas. The first force applied by the first curved segment 1 to the first pressing area 1021 is evenly distributed around the first pressing area 1021, clamping and fixing the first pressing member 103 to the position of the first pressing area 1021. The first curved segment 1 of the two pressing areas is in contact with the outer periphery of the first pressing area 1021. The two pressing areas are the first pressing area and the second pressing area.

[0045] In this application, the component to be clamped may include a second clamping component 104 and a third clamping component 105 clamping the wire clamp 102, which is placed in a crimping cavity structure. The second clamping component 104 is partially located at the opening of the wire clamp 102, and the third clamping component 105 is located between the wire clamp 102 and the second clamping component 104. In this application, the second clamping component 104 may be a contact wire, and the third clamping component 105 may be a U-shaped pin. Inner grooves are provided on both sides of the contact wire. After the contact wire is assembled at the opening of the wire clamp 102, both ends of the U-shaped pin are inserted between the inner grooves and the inner wall of the opening end of the wire clamp 102. After the wire clamp 102 is compressed and shaped, the contact wire and the U-shaped pin are clamped and fixed at the opening of the wire clamp 102.

[0046] In some optional embodiments, the tightening section 3 may further include a second curved section 31 connected to the protruding section 32, wherein the second curved section 31 surrounds a portion of the second pressing member 104, and the shape of the second curved section 31 is adapted to the outer contour shape of the second pressing member 104 facing the second curved section 31. After the two molds 100 are closed, in the first pressing area and the second pressing area, the second curved section 31 surrounds the periphery of the second pressing member 104. This arrangement of the shape structure of the second curved section 31 makes the overall design of the pressing cavity structure more rational and facilitates the processing of the pressing cavity structure in the mold 100.

[0047] In some alternative embodiments, the tightening section 3 may further include a second curved section 31 connected to the protruding section 32, wherein the second curved section 31 surrounds a portion of the second clamping member 104, and a clearance space is provided between the second curved section and the outer contour of the second clamping member toward the second curved section.

[0048] The second curved segment 31 in both the first and second crimping areas together surrounds the second clamping member 104, and both have clearance space with the second clamping member 104. During the mold closing process of the two molds 100, if the second curved segment 31 is in close contact with the second clamping member 104, it will cause wear on the outer circumferential surface of the contact wire that is not pressed by the clamp 102. In railway catenary systems, contact wire wear can lead to pantograph-catenary disconnection, arc erosion, hard spot pantograph failure, abnormal wear, speed limitation, and even wire breakage. This application provides clearance space between the second curved segment 31 and the second clamping member 104, avoiding the contact wire wear problem and ensuring the stable operation of the railway catenary system.

[0049] In some optional embodiments, the tightening section 3 may further include a second curved section 31 connected to the protruding section 32, wherein the second curved section 31 surrounds a portion of the second clamping member 104. The protruding section 32 and the second curved section 31 in the tightening section 3 are connected by an inner protruding section 33, which is adapted to the outer contour shape of the transition between the wire clamp 102 and the second clamping member 104, and is used to apply a symmetrical force toward the wire clamp 102, thereby further tightening the end of the wire clamp 102 when it is pressed. Both the first and second pressing areas include the inner protruding section 33. During mold closing, the inner protruding section 33 applies a symmetrical force toward the open end of the wire clamp 102, so that the wire clamp 102 and the second clamping member 104 fit together seamlessly. By setting an inner protruding section 33 that matches the outer contour of the transition position of the protruding section 32 and the second curved section 31, during mold closing, the inner protruding section 33 will apply a force toward the end of the opening of the wire clamp 102 in the first pressing area and the second pressing area, which is symmetrical about the wire clamp 102. This force will cause the opening of the wire clamp 102 to be further tightened and shaped in the direction of its symmetrical line, so as to achieve a seamless fit with the second clamping member 104.

[0050] In some optional embodiments, the cavity corresponding to the crimping cavity structure has a chamfered edge. The chamfer can be either a C-angle or a R-angle; the specific form of the chamfer is not limited here. By setting the chamfer, on the one hand, sharp corners can be avoided within the crimping cavity structure, preventing stress concentration on the cavity surfaces of the two molds 100 when they are closed, thus extending the service life of the molds 100. On the other hand, the chamfer can guide the plastic deformation of the wire clamp 102 during crimping, improving the uniformity of flow during deformation and enhancing the reliability of the crimping. The chamfer also eliminates burrs on the crimping cavity structure, preventing workers from being scratched when crimping the wire clamp 102, U-pins, contact wires, and electrical connection wires.

[0051] In some optional embodiments, the crimping cavity structure in this application can accommodate wire clamps 102 of at least 90° and 40° angles. For example... Figure 6 The image shows the specific structure of a 40° wire clamp, which is commonly referred to as a DB3 wire clamp. Figure 8 The image shows the specific structure of a 90° wire clamp, which is commonly referred to as a DB2 wire clamp.

[0052] This application provides a crimping mold, which may include the aforementioned crimping cavity structure. The wire clamp 102, U-pin, contact wire, and electrical connection wire crimped using the crimping mold of this application can meet the requirement of "seamless". In some optional embodiments, the crimping mold may include two molds 00, namely a first mold and a second mold, which, when closed together, form a crimping cavity structure.

[0053] In this application, the hardness of the U-pin, contact wire, clamp 102, and electrical connection wire decreases sequentially, with the electrical connection wire having the lowest hardness. When the mold is closed, the clamp 102 first contacts the mold 100, causing the clamp 102 to deform. The deformation of the first pressing area 1021 causes the electrical connection wire to deform, clamping the electrical connection wire to the clamp 102. Simultaneously, the deformation of the second pressing area 1022 causes the opening of the clamp 102 to close inward, wrapping the U-pin until it contacts the contact wire. The threads of the U-pin compress the clamp 102 and the contact wire, causing the clamp 102 and the contact wire to deform at the clamped position. The clamp 102 and the contact wire are tightly connected, achieving a "seamless" fit.

[0054] This application provides a crimping device, which may include the aforementioned crimping mold, a driving unit, and a fixing unit. The fixing unit is used to fix the first crimping mold, and the driving unit is connected to the second crimping mold and is used to drive the second crimping mold to move closer to the first crimping mold, so that the first crimping mold and the second crimping mold close together, and the wire clamp 102 clamps and fixes the workpiece to be crimped. The crimping device may be a hydraulic clamp, the fixing unit is the clamp body of the hydraulic clamp, and the driving unit is the hydraulic cylinder of the hydraulic clamp. The first crimping mold is fixedly assembled with the clamp body, and the second crimping mold is connected to the output end of the hydraulic cylinder. When an external hydraulic device supplies hydraulic oil to the hydraulic cylinder, the piston in the hydraulic cylinder extends, and the second crimping mold moves closer to the first crimping mold, so that the two close together, and the wire clamp 102 tightens, thus firmly fixing the U-shaped pin, the contact wire, and the electrical connection wire clamp 102.

[0055] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A crimping cavity structure for clamping a workpiece to be crimped into a wire clamp; the wire clamp includes a first crimping area and a second crimping area having a protrusion, the crimping cavity structure being formed by two opposing surfaces of a crimping die; characterized in that, The compression cavity structure includes: The first pressing zone includes the first curved section and the tightening section; The first crimping area surrounds a portion of the first area to be crimped and the second area to be crimped. The first curved segment is adapted to the outer contour shape of the first area to be pressed toward the first curved segment, and the tightening segment is adapted to the outer contour shape of the second area to be pressed toward the tightening segment. The tightening segment includes a protruding segment adapted to the protrusion. And a second crimping area symmetrically arranged with respect to the first crimping area, the second crimping area having the same shape as the first crimping area.

2. The press-fit cavity structure according to claim 1, characterized in that, The first pressing area also includes a linear segment. The first curved segment and the tightening segment are located on both sides of the linear segment. When the two molds are closed, in the first pressing area and the second pressing area, the first curved segment and the linear segment apply the first force to the first pressing area, and the tightening segment and the linear segment apply the second force to the second pressing area, so that the wire clamp presses the part to be pressed.

3. The press-fit cavity structure according to claim 1, characterized in that, The direction of the symmetry line of the press-fit cavity structure is perpendicular to the pressing direction of the two press dies.

4. The press-fit cavity structure according to claim 2, characterized in that, The first force is a pressing force toward the first area to be pressed; the second force is a pressing force toward the second area to be pressed.

5. The press-fit cavity structure according to claim 2, characterized in that, The linear segment is parallel to the line of symmetry of the clamp, or the extension of the linear segment intersects the line of symmetry of the clamp.

6. The press-fit cavity structure according to claim 5, characterized in that, When the extension of the linear segment intersects the symmetrical line of the clamp, the angle between the two intersections is less than 15°.

7. The crimping cavity structure according to claim 1, wherein the part to be crimped includes a first crimping part assembled in the first crimping area, and the wire clamp is placed inside the crimping cavity structure; Its features are, The curvature of the first curve segment is equal to the curvature of the first pressure zone. When the two pressure molds are closed, the first pressing member presses against the first pressure zone.

8. The crimping cavity structure according to claim 1, wherein the part to be crimped includes a second clamping part and a third clamping part clamped to the wire clamp; the wire clamp is placed inside the crimping cavity structure; Its features are, The tightening section also includes a second curved section connected to the protruding section, the second curved section surrounding a portion of the second clamping member, and the second curved section being adapted to the outer contour shape of the second clamping member toward the second curved section.

9. The crimping cavity structure according to claim 1, wherein the part to be crimped includes a second clamping part and a third clamping part clamped to the wire clamp; the wire clamp is placed inside the crimping cavity structure; Its features are, The tightening section also includes a second curved section connected to the protruding section. The second curved section surrounds part of the second clamping member, and a clearance space is left between the second curved section and the outer contour of the second clamping member facing the second curved section.

10. The crimping cavity structure according to claim 1, wherein the part to be crimped includes a second clamping part and a third clamping part clamped to the wire clamp; the wire clamp is placed inside the crimping cavity structure; Its features are, The tightening section further includes a second curved section connected to the protruding section. The second curved section surrounds a portion of the second clamping member. The protruding section and the second curved section are connected by an inner convex section. The inner convex section is adapted to the outer contour shape of the transition between the wire clamp and the second clamping member toward the tightening section. It is used to apply a force toward the wire clamp along a symmetrical line.

11. The press-fit cavity structure according to claim 1, characterized in that, The specifications of the clamps include at least 90° clamps and 40° clamps.

12. A pressing die, characterized in that, Includes the pressing cavity structure as described in any one of claims 1-11; the pressing mold includes two pressing molds, which enclose the pressing cavity structure.

13. A crimping device, characterized in that, include: The pressing die as described in claim 12; as well as The driving unit and the fixing unit are provided. The fixing unit is used to fix one of the pressing molds. The driving unit is connected to the other pressing mold and is used to bring the two pressing molds close together so that the wire clamp can clamp and fix the part to be pressed.

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