Multi-field loose cross-dimension coupling optimized electromagnetic pulse wire harness crimping magnetic collector structure

Abstract

The utility model relates to a multi-field loose cross-dimension coupling optimized electromagnetic pulse wire harness crimping magnetic collector structure, which comprises a cylindrical magnetic collector body, the magnetic collector body is provided with a central hole along the axial direction, the central hole comprises a crimping hole positioned in the middle and taper holes positioned at two ends and communicated with the crimping hole, and the taper holes are communicated with the crimping hole. The inner wall of the compression joint hole forms a compression joint area, the inner wall of the taper hole is a taper wall, one or more first ring grooves are formed in the taper wall, and the first ring grooves disperse the inner surface of the taper hole into a plurality of first ring areas. According to the magnetic collector, the effective crimping length is remarkably increased while the crimping strength is ensured, a long crimping area with the crimping force gradually reduced from the center to the two ends is formed, and the problems of poor electrical performance such as over-high contact resistance of a joint and over-fast local temperature rise caused by insufficient crimping length are fundamentally solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic pulse manufacturing, specifically to a multi-field loose cross-dimension coupling optimized electromagnetic pulse wire harness crimping magnetic collector structure. BACKGROUND

[0002] Electromagnetic pulse manufacturing technology is an advanced processing technology system that drives metal materials to deform at high speed through electromagnetic pulse force. This technology can be widely used in welding, riveting, crimping and forming processes, and can reconfigure the performance boundaries of these traditional technologies. Its core advantage is extremely high speed, which can form high-strength and high-reliability welding / riveting joints and sheet metal parts by using the rate enhancement effect of metal materials at high strain rate and the shock wave diffusion mechanism. Therefore, electromagnetic pulse manufacturing technology has broad application prospects in many industrial fields such as passenger car manufacturing, aerospace, and white goods.

[0003] The magnetic collector is a key component in electromagnetic pulse manufacturing equipment, which functions to concentrate and reconfigure the primary electromagnetic field generated by the drive coil, inducing strong secondary induced current in the workpiece area, and then generating electromagnetic pulse force (Lorentz force) sufficient to cause plastic deformation of the material. For cylindrical structure magnetic collectors, there are mainly two typical designs in the prior art.

[0004] The first design is a straight-hole type magnetic collector penetrating both ends of the cylinder, as shown in Figure 1 Although this structure is simple, it has obvious defects in crimping applications: when two workpieces (such as cable terminals) to be crimped are placed in the center of the straight hole, the electromagnetic force generated will be evenly distributed on the inner wall of the entire straight hole, and cannot effectively concentrate on the interface area of the workpieces to be connected. This results in insufficient effective crimping force between the workpieces, making it difficult to form a dense and reliable connection, ultimately resulting in unqualified crimping quality.

[0005] The second design adopts a more complex hole structure to overcome the above problems, as shown in Figure 2 , Figure 3As shown, its central hole typically comprises three parts: a smaller diameter crimping hole in the middle (whose inner wall forms the crimping area), and tapered holes at both ends of the magnet collector that communicate with the crimping hole. The tapered hole design effectively guides and concentrates electromagnetic force onto the central crimping area, significantly increasing the pressure at the crimping interface and improving connection tightness. However, this structure introduces a new technical bottleneck: its effective crimping area is limited to the finite-length straight-walled crimping hole in the middle. This results in insufficient crimping length between workpieces, leading to a limited contact area of ​​the formed joint. During subsequent service, especially under high current conditions, this area exhibits problems such as excessively high contact resistance and rapid localized temperature rise, severely affecting the reliability and safety of the electrical connection, and even posing a risk of overheating.

[0006] Therefore, there is an urgent need in this field for a new type of magnet collector structure that can both ensure the effective concentration of electromagnetic force to provide sufficient crimping strength and significantly increase the length of the effective crimping area, thereby forming a high-quality connector with excellent electrical performance and reliable connection. Utility Model Content

[0007] This invention provides an electromagnetic pulse harness crimping magnet collector structure optimized by multi-field loose cross-dimensional coupling. Its purpose is to solve the problem that existing magnet collectors cannot simultaneously guarantee sufficient crimping strength and a sufficiently long crimping area, resulting in poor quality or poor electrical performance of the crimped joint.

[0008] To achieve the above objectives, this utility model provides a multi-field loose cross-dimensional coupling optimized electromagnetic pulse harness crimp magnet collector structure, including a cylindrical magnet collector body. The magnet collector body has a central hole along the axial direction. The central hole includes a crimping hole located in the middle and tapered holes located at both ends and communicating with the crimping hole. The inner wall of the crimping hole forms a crimping area. The inner wall of the tapered hole is a tapered wall. One or more first annular grooves are formed on the tapered wall. The first annular grooves discretize the inner surface of the tapered hole into multiple first annular regions.

[0009] Furthermore, the inner wall of the crimping hole is provided with one or more second annular grooves, which divide the inner wall of the crimping hole into multiple second annular regions.

[0010] Furthermore, the cross-sectional shape of the first annular groove and the second annular groove is rectangular, trapezoidal, or arc-shaped.

[0011] Furthermore, each of the first annular grooves or each of the second annular grooves is distributed at equal intervals.

[0012] Furthermore, the radius of each of the first annular grooves gradually increases from the crimping hole toward the end of the magnet collector.

[0013] Furthermore, the radii of each of the second annular grooves are the same.

[0014] Furthermore, multiple first annular regions and multiple second annular regions together constitute a continuous long pressing zone with a pressing force gradient distribution.

[0015] Furthermore, the axial length of the long pressing area is not less than one-half of the total axial length of the magnet body.

[0016] Furthermore, the length of the crimping hole in the axial direction is not less than one-third of the length of the tapered hole in the axial direction.

[0017] Furthermore, the first annular groove and / or the second annular groove are formed by machining or electrical discharge machining.

[0018] The beneficial effects of this utility model are:

[0019] Compared with existing technologies, this invention provides a multi-field loose cross-dimensional coupling optimized electromagnetic pulse wire harness crimping magnet collector structure. By creating one or more first annular grooves on the conical wall of the magnet collector's conical hole, the originally continuous conical surface is discretized into multiple independent annular regions. This structure changes the distribution and transmission of electromagnetic force: it inherits the advantage of the second type of magnet collector concentrating pressure through the conical surface, ensuring that the central region of the crimping interface receives sufficiently strong crimping force to achieve a tight connection; and through the discretized annular regions, a portion of the strong crimping force is gradient-distributed and extended along the axial direction, thereby effectively expanding the effective crimping area from the limited central crimping hole section to the entire discrete annular region of the conical wall. Ultimately, this invention significantly increases the effective crimping length while ensuring crimping strength, forming a long crimping zone where the crimping force gradually decreases from the center to both ends. This fundamentally solves the problems of poor electrical performance caused by insufficient crimping length, such as excessively high contact resistance and excessively rapid local temperature rise, significantly improving the overall performance of the crimped joint. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 This is a structural diagram of a straight-hole type magnet collector in the existing technology.

[0022] Figure 2 This is a structural diagram of a conical aperture magnet collector in existing technology.

[0023] Figure 3 This is a diagram of the internal structure of a conical aperture magnet collector in the prior art.

[0024] Figure 4This is a schematic diagram of an improved magnet collector structure disclosed in this utility model.

[0025] Figure 5 This is a schematic diagram of the internal structure of an improved magnet collector disclosed in this utility model.

[0026] Figure 6 This is a schematic diagram of the improved magnet collector body dimensions and structure disclosed in this utility model.

[0027] Figure 7 yes Figure 6 A magnified view of a portion of point A in the middle.

[0028] Reference numerals: 1. Magnet collector body; 2. Terminal; 10. Crimping hole; 11. Tapered hole; 110. First annular groove. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] like Figure 4 , Figure 5 As shown, this utility model provides a multi-field loose cross-dimensional coupling optimized electromagnetic pulse harness crimp magnet collector structure. The magnet collector includes a magnet collector body 1 made of a highly conductive material (such as copper or aluminum alloy), which is cylindrical in shape, with a central hole extending through it along its axial direction.

[0031] The central hole is composed of three interconnected channels: the middle section is a cylindrical cavity with a uniform diameter, defined as the crimping hole 10, whose inner wall directly forms the crimping area for pressing the workpiece; at both ends of the crimping hole 10, there is a funnel-shaped conical hole 11, which is symmetrically arranged about the crimping hole 10. The inner wall of each conical hole 11, i.e., the conical wall, starts from the outer end face of the magnet collector and converges inward at a certain angle, eventually smoothly connecting with the central crimping hole 10.

[0032] On the conical walls of the two conical holes 11, one or more first annular grooves 110 are machined. Each first annular groove 110 is an annular groove surrounding the conical wall. Their insertion divides and discretizes the originally continuous, integral inner surface of the conical hole into multiple independent first annular regions arranged axially. These annular regions, together with the central crimping area, form an extended crimping area where the crimping force gradually transitions from the center to both ends. This solves the problem that existing magnet collectors cannot simultaneously guarantee sufficient crimping strength and a sufficiently long crimping area, leading to poor quality or electrical performance of the terminal 2 crimp joint.

[0033] In a preferred embodiment of this invention, the structure of the magnet collector is not limited to the conical hole 11, but extends further to the inner wall of the crimping hole 10. Specifically, one or more second annular grooves (not shown) can be formed on the inner wall of the crimping hole 10. The second annular grooves function similarly to the first annular groove 110 on the conical wall, dividing and discretizing the originally smooth and continuous inner wall of the crimping hole 10 into multiple independent second annular regions, making the electromagnetic force distribution in the crimping area more precise and controllable.

[0034] The cross-sectional shapes of the first and second annular grooves 110 can be designed as rectangular, trapezoidal, or arc-shaped according to process requirements; different shapes correspond to different force flow guiding effects. These annular grooves can be evenly spaced to ensure uniform and predictable pressure distribution. Specifically, the radius (or diameter) of each first annular groove on the conical wall gradually increases from the central pressing hole towards the end of the magnet collector. In contrast, the radius of each second annular groove located on the cylindrical pressing hole remains consistent.

[0035] Ultimately, the discrete first annular regions on the conical wall and the discrete second annular regions on the crimping hole wall together constitute a continuous "long crimping zone" with the crimping force gradually decreasing from the center to both ends. The axial length of this long crimping zone is preferably not less than half the total axial length of the magnet body 1 to ensure sufficient connection area. As a further dimensional optimization, the axial length of the central crimping hole 10 should also not be too short, preferably not less than one-third the axial length of a single conical hole 11, to ensure sufficient basic crimping force at the center.

[0036] All of the aforementioned first annular grooves 110 and second annular grooves can be formed on the magnet body by high-precision machining (such as turning) or electrical discharge machining processes, thereby ensuring dimensional accuracy and structural strength.

[0037] like Figure 6 and Figure 7 As shown, It is 10mm. Depending on the inner diameter of the main coil, which is 120mm in this case, Depending on the position of the mounting screw holes, here it is 90mm. In the area of ​​tapered hole 11, the width w of each first annular groove 110 is 2mm, and g is 2mm, depending on the EDM capability.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-field loose cross-dimensional coupling optimized electromagnetic pulse wire harness crimp magnet collector structure, comprising a cylindrical magnet collector body, the magnet collector body having a central hole along the axial direction, the central hole including a crimping hole located in the middle and conical holes located at both ends and communicating with the crimping hole, the inner wall of the crimping hole forming a crimping area, and the inner wall of the conical hole being a conical wall, characterized in that, One or more first annular grooves are formed on the conical wall, and the first annular grooves discretize the inner surface of the conical hole into multiple first annular regions.

2. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 1, characterized in that, The inner wall of the crimping hole is provided with one or more second annular grooves, which divide the inner wall of the crimping hole into multiple second annular regions.

3. The multi-field loose cross-dimensional coupling optimized electromagnetic pulse harness press-fit magnet structure as described in claim 1 or 2, characterized in that, The cross-sectional shape of the first annular groove and the second annular groove is rectangular, trapezoidal or circular arc.

4. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 2, characterized in that, Each of the first annular grooves or each of the second annular grooves is distributed at equal intervals.

5. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 2, characterized in that, The radius of each of the first annular grooves gradually increases from the crimping hole toward the end of the magnet collector.

6. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 2, characterized in that, The radius of each of the second annular grooves is the same.

7. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 2, characterized in that, Multiple first annular regions and multiple second annular regions together constitute a continuous long pressing zone with a pressing force gradient distribution.

8. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 7, characterized in that, The axial length of the long pressing area is not less than one-half of the total axial length of the magnet body.

9. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 1, characterized in that, The length of the crimping hole in the axial direction is not less than one-third of the length of the tapered hole in the axial direction.

10. The electromagnetic pulse harness press-fit magnet structure optimized by multi-field loose cross-dimensional coupling as described in claim 2, characterized in that, The first annular groove and / or the second annular groove are formed by machining or electrical discharge machining.

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