Quality detection equipment and detection method for composite conductive connector

Abstract

The application relates to the technical field of mechanical performance detection, in particular to a quality detection equipment and detection method for a composite conductive connecting piece, which comprises an electrical performance detection device, a mechanical performance detection device, an environmental adaptability performance detection device and a material analysis detection device, the mechanical performance detection device comprises a supporting seat and a bearing frame arranged on the supporting seat, two groups of clamping units are installed at the bottom of the bearing frame, and the two groups of clamping units are connected with a deflection driving element installed on the bearing frame; an axial insertion piece is installed on the bearing frame, and a swelling abutting piece is connected with a movable end of the axial insertion piece; the axial insertion piece is matched with an expansion piece, the axial insertion piece can be non-damageably matched with the inner cavities of workpieces of multiple specifications, full circumferential surface contact and abutment with the inner cavity wall are realized, the axial insertion piece moves reversely, a certain axial pulling force is applied to the inner cavity wall, the force value change amount in the axial pulling process is monitored in real time, and the small relative displacement between the inner conductor and the outer insulating layer can be directly captured.

Description

Technical Field

[0001] This invention relates to the field of mechanical performance testing technology, specifically to a quality testing device and method for composite conductive connectors. Background Technology

[0002] Currently, most mainstream composite conductive connectors for transformers adopt an integrated structure of metal conductor crimp sleeves and external composite insulation seals. Some high-reliability connectors used in new energy transformers further incorporate functional layers such as gold-plated springs and graphite conductive connecting pieces at the contact points to further reduce contact resistance and improve arc resistance. However, in actual industrial production, the quality stability of composite conductive connectors always presents unavoidable risks. Therefore, quality testing is necessary before shipment. The operating conditions of composite conductive connectors dictate that quality testing cannot rely solely on routine dimensional inspections. A comprehensive testing system covering four dimensions—electrical performance, mechanical performance, environmental adaptability, and material analysis—must be established. This is a core prerequisite for ensuring the long-term stable operation of transformers.

[0003] Currently, the mechanical properties of composite conductive connectors are tested, including tensile strength and vibration fatigue testing. Existing tensile strength tests often employ internal cavity tightening structures such as steel ball pushing or single-lobed wedge-shaped expansion blocks, using point contact or partial line contact. During tightening, only a few stress points are formed within the workpiece cavity, easily causing localized pressure damage and stress concentration on the cavity wall. This can scratch the gold plating and graphite functional layer, and even directly lead to irreversible deformation of the precision thin-walled connector. Furthermore, the tightening pressure of these structures cannot be precisely controlled, and the uniformity of cavity fit varies greatly between different batches of workpieces. During pull-out testing, localized slippage and sudden force changes can easily occur, failing to provide a stable and reliable stress basis for tensile strength testing. This can even directly lead to distorted test data, failing to accurately reflect the actual mechanical properties of the product. Summary of the Invention

[0004] The purpose of this invention is to provide a quality inspection device for composite conductive connectors to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A quality testing device for composite conductive connectors includes an electrical performance testing device, a mechanical performance testing device, an environmental adaptability testing device, and a material analysis and testing device. The mechanical performance testing device includes a support base and a receiving frame disposed on the support base.

[0007] The bottom of the receiving frame is equipped with two sets of coaxially arranged clamping units. The two sets of clamping units can clamp and position the two ends of the composite conductive connector respectively. Both sets of clamping units are connected to the deflection drive unit installed on the receiving frame. The deflection drive unit drives the clamping posture adjustment synchronously.

[0008] An axial insert is mounted on a receiving frame and is coaxial with the clamping unit. The movable end of the axial insert is connected to a radially expandable and contractile tightening abutment. The axial insert can extend into the internal cavity of the composite conductive connector. After the tightening abutment expands uniformly outward along the circumference and forms an abutment with the inner cavity wall of the composite conductive connector and applies a preset pressure, the axial insert applies a preset axial pulling force to the inner cavity wall.

[0009] The quality inspection equipment for composite conductive connectors as described above: the clamping unit includes a pad, the pad is installed at the bottom of the receiving frame, a turntable is rotatably mounted on the pad, the pad and the turntable are coaxially arranged and both have through holes along the axial direction, and an movable space is formed between the pad and the turntable to accommodate multiple radially pushing members evenly arranged in the circumferential direction to clamp and position the composite conductive connector.

[0010] The quality inspection equipment for composite conductive connectors as described above: the radial pusher includes a clamping block, a guide post is formed on the bottom end face of the clamping block, a limit post is formed on its top end face, and a plurality of guide grooves are distributed circumferentially on the pad, the guide post can be inserted into the guide groove and slide with the guide groove.

[0011] The quality inspection equipment for composite conductive connectors as described above: multiple inclined grooves are evenly distributed along the circumference of the turntable, the limiting post can be inserted into the inclined groove and slides with the inclined groove, and an extension plate is provided radially on the outer peripheral wall of the turntable, and a limiting groove is formed on the extension plate.

[0012] The quality inspection equipment for the composite conductive connector as described above: the deflection drive includes a third electric telescopic rod, one end of which is connected to the receiving frame, and a push rod is rotatably connected to the other end. The two ends of the push rod can be inserted into the two limiting grooves respectively and slide relative to the limiting grooves.

[0013] The quality inspection equipment for the composite conductive connector as described above: the axial insert includes a lifting plate, the lifting plate is slidably disposed on the receiving frame, and a connecting rod is connected to the lifting plate. The connecting rod has a hollow structure inside, and a plurality of sliders are evenly distributed along the circumference at one end of the connecting rod. A groove is formed on the slider.

[0014] It also includes a first electric telescopic rod, which is installed on the receiving frame, and the movable rod of the first electric telescopic rod is connected to the lifting plate.

[0015] The quality inspection equipment for the composite conductive connector as described above: the tightening abutment includes an adjusting rod, the adjusting rod is coaxially arranged with the connecting rod and slidably inserted into the connecting rod, both ends of the adjusting rod pass through the connecting rod respectively, and one end of the adjusting rod is connected to the connecting rod along the circumferential direction with multiple extension members;

[0016] It also includes a second electric telescopic rod, which is mounted on the lifting plate, and the movable rod of the second electric telescopic rod is connected to the end of the adjusting rod away from the extension member.

[0017] The quality inspection equipment for the composite conductive connector as described above: the extension component includes an extension plate, the extension plate is arranged in an arc shape, and a first connecting rod and a second connecting rod with a scissor-shaped distribution are respectively hinged on the extension plate. The end of the first connecting rod away from the extension plate is hinged to the adjusting rod, and a protrusion is hinged on the end of the second connecting rod away from the extension plate. The protrusion can be inserted into the sliding groove and slide in cooperation with the sliding groove.

[0018] A quality inspection method for composite conductive connectors, using the quality inspection equipment for composite conductive connectors described in any one of the above claims, includes the following steps:

[0019] Step 1: Place the composite conductive connector to be tested coaxially between the clamping stations, start the deflection drive to drive the two sets of clamping units to move synchronously, and apply uniform clamping force from multiple directions around the workpiece through synchronous linkage circumferential clamping action to complete the centering and positioning clamping of the two ends of the composite conductive connector.

[0020] Step 2: After the composite conductive connector to be tested is clamped, the axial insertion component is driven to extend into the internal cavity of the composite conductive connector along the axis. After it is in place, the expansion and tightening contact component is driven to expand outward, forming a uniform circumferential surface contact with the inner cavity wall and applying a preset radial pressure.

[0021] Step 3: After the expansion joint is tightly pressed against the inner cavity wall, the axial insertion part is pulled back to apply a preset axial pulling force. During the detection cycle, the pressure change and whether the inner conductor and outer insulation layer of the composite conductive connector are separated are collected in real time to determine whether the bonding strength between the inner and outer layers of the composite conductive connector meets the qualified threshold. After the detection is completed, the expansion joint is first driven to radially contract and separate from the inner cavity wall, then the axial insertion part is driven to completely withdraw from the workpiece, and finally the circumferential clamping constraints at both ends are released, and the workpiece is taken out to complete the full process detection.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This invention uses a deflection drive to synchronously link two sets of clamping units, converting linear motion into the circumferential rotation of the turntable, and then into the radial synchronous retraction of multiple sets of clamping blocks through inclined plane transmission. This achieves uniform clamping from multiple directions around the workpiece, avoiding the problems of off-center load and coaxiality deviation that are prone to occur in traditional single-sided clamping. It can also adaptively compensate for the small stroke difference during the rotation of the two sets of turntables, ensuring that the internal cavity of the composite conductive connector and the axial insert always maintain a high-precision coaxial state, eliminating detection errors from the clamping source, and adapting to the positioning requirements of workpieces with different outer diameter specifications.

[0024] By using an axial insert in conjunction with a scissor-type extension, the axial displacement of the adjusting rod synchronously drives multiple sets of arc-shaped extension plates to expand uniformly outward along the circumference. This allows for non-damaging adaptation to the inner cavities of workpieces with different inner diameters, achieving full circumferential surface contact with the inner cavity wall. This avoids the problems of local pressure loss and stress concentration in the inner cavity that are easily caused by traditional point-contact tightening structures. The tightening pressure can be precisely controlled to a preset threshold, ensuring the uniformity and stability of radial fit, and providing a reliable force foundation for subsequent pull-out testing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a quality testing device for composite conductive connectors.

[0026] Figure 2 This is a schematic diagram of the support frame and axial insertion component in a quality testing device for composite conductive connectors.

[0027] Figure 3 This is a schematic diagram of the lifting plate in a quality inspection device for composite conductive connectors.

[0028] Figure 4 This is a schematic diagram of the connecting rod and adjusting rod in a quality testing device for composite conductive connectors.

[0029] Figure 5 This is a schematic diagram of the expansion joint in a quality testing device for composite conductive connectors.

[0030] Figure 6 This is a schematic diagram of the structure of the extension component in a quality testing device for composite conductive connectors.

[0031] Figure 7 This is a schematic diagram of the clamping unit in a quality inspection device for composite conductive connectors.

[0032] Figure 8 This is a schematic diagram of the turntable and pad in a quality inspection device for composite conductive connectors.

[0033] In the diagram: 1. Support base; 2. Receiving frame; 3. Lifting plate; 4. First electric telescopic rod; 5. Guide rod; 6. Second electric telescopic rod; 7. Hoop; 8. Connecting rod; 801. Sliding block; 802. Slide groove; 9. Adjusting rod; 10. Extension plate; 11. Protruding column; 12. First connecting rod; 13. Second connecting rod; 14. Third electric telescopic rod; 15. Turntable; 1501. Inclined groove; 1502. Limiting groove; 16. Push rod; 17. Pad; 1701. Guide groove; 18. Clamping block; 1801. Limiting post. Detailed Implementation

[0034] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0035] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0036] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0037] Please see Figures 1-8 In this embodiment of the invention, a quality testing device for composite conductive connectors includes an electrical performance testing device, a mechanical performance testing device, an environmental adaptability testing device, and a material analysis and testing device. The mechanical performance testing device includes a support base 1 and a receiving frame 2 disposed on the support base 1.

[0038] The bottom of the receiving frame 2 is equipped with two sets of coaxially arranged clamping units. The two sets of clamping units can clamp and position the two ends of the composite conductive connector respectively. Both sets of clamping units are connected to the deflection drive installed on the receiving frame 2. The deflection drive synchronously drives the clamping posture adjustment.

[0039] An axial insert is mounted on the receiving frame 2 and is coaxial with the clamping unit. The movable end of the axial insert is connected to a radially expandable and contractile tightening abutment. The axial insert can extend into the internal cavity of the composite conductive connector. After the tightening abutment expands uniformly outward along the circumference and forms an abutment with the inner cavity wall of the composite conductive connector and applies a preset pressure, the axial insert applies a preset axial pulling force to the inner cavity wall.

[0040] In this embodiment, after the composite conductive connector to be tested is placed in the clamping station, the deflection drive synchronously drives two sets of clamping units to complete the clamping action, ensuring that both ends of the connector are accurately clamped and positioned, and ensuring that its internal cavity and axial insert are coaxial. Subsequently, the axial insert extends into the internal cavity of the composite conductive connector along the axial direction. After it is in place, the expansion abutment at the drive end expands uniformly outward along the circumference, forming a uniform abutment with the inner cavity wall of the connector. After the pressure applied by the expansion abutment to the inner cavity wall reaches a preset threshold, the axial insert moves in the opposite direction, applying a certain axial pull force to the inner cavity wall. By monitoring the change in force value during the axial pull process in real time, the minute relative displacement between the inner conductor and the outer insulation layer can be directly captured. The bonding strength between the two can be quickly identified without disassembling the sample, and the overall tensile strength test of the composite conductive connector can be completed simultaneously, which greatly improves the efficiency of mechanical performance testing of the composite conductive connector before it leaves the factory.

[0041] As a further embodiment of the present invention, please refer to... Figure 7 and Figure 8 The clamping unit includes a pad 17, which is installed at the bottom of the receiving frame 2. A turntable 15 is rotatably mounted on the pad 17. The pad 17 and the turntable 15 are coaxially arranged and both have through holes along the axial direction. An movable space is formed between the pad 17 and the turntable 15 to accommodate multiple radially pushing members evenly arranged in the circumferential direction to clamp and position the composite conductive connector.

[0042] The radial pusher includes a clamping block 18, a guide post is formed on the bottom end face of the clamping block 18, and a limiting post 1801 is formed on its top end face. The pad 17 has a plurality of guide grooves 1701 distributed circumferentially. The guide post can be inserted into the guide groove 1701 and slide with the guide groove 1701.

[0043] The turntable 15 has a plurality of inclined grooves 1501 evenly distributed along its circumference. The limiting post 1801 can be inserted into the inclined groove 1501 and slides with the inclined groove 1501. An extension plate is provided radially on the outer peripheral wall of the turntable 15, and a limiting groove 1502 is formed on the extension plate.

[0044] The deflection drive includes a third electric telescopic rod 14. One end of the third electric telescopic rod 14 is connected to the receiving frame 2, and a push rod 16 is rotatably connected to the other end. The two ends of the push rod 16 can be inserted into the two limiting grooves 1502 respectively and slide relative to the limiting grooves 1502.

[0045] In the initial state, multiple circumferentially distributed clamping blocks 18 are in a fully open position. After the composite conductive connector is conveyed through two sets of turntables 15, the third electric telescopic rod 14 is activated, driving the push rod 16 hinged on the movable rod to move synchronously. Under the constraint of the limiting groove 1502, the push rod 16 compresses the turntable 15. The push rod 16 can adaptively slide within the limiting grooves 1502 at both ends, automatically compensating for the small stroke difference during the rotation of the two sets of turntables 15, and can convert the linear motion of the third electric telescopic rod 14 into the motion of the turntable 15. The rotational motion of the turntable 15; during the rotation of the turntable 15, the inclined groove 1501 and the limiting post 1801 form an inclined surface transmission cooperation, which converts the circumferential rotational motion of the turntable 15 into the radial linear motion of the clamping block 18; at the same time, the guide post at the bottom of the clamping block 18 is restricted to slide in the guide groove 1701 of the pad 17, which effectively constrains the circumferential motion trend of the clamping block 18, ensuring that all clamping blocks 18 converge towards the center radially in sync, and finally form a uniform clamping and holding of the outer periphery of the composite conductive connector from multiple directions, so as to achieve the centering clamping of the workpiece without off-center load.

[0046] As a further embodiment of the present invention, please refer to... Figures 3-6 The axial insert includes a lifting plate 3, which is slidably disposed on the receiving frame 2, and a connecting rod 8 is connected to the lifting plate 3. The connecting rod 8 has a hollow structure, and a plurality of sliders 801 are evenly distributed along the circumference at one end of the connecting rod 8. A groove 802 is formed on the slider 801.

[0047] It also includes a first electric telescopic rod 4, which is installed on the receiving frame 2, and the movable rod of the first electric telescopic rod 4 is connected to the lifting plate 3.

[0048] The tightening abutment includes an adjusting rod 9, which is coaxially arranged with the connecting rod 8 and slidably inserted into the connecting rod 8. Both ends of the adjusting rod 9 pass through the connecting rod 8, and multiple extension members are circumferentially connected between one end of the adjusting rod 9 and the connecting rod 8.

[0049] It also includes a second electric telescopic rod 6, which is mounted on the lifting plate 3, and the movable rod of the second electric telescopic rod 6 is connected to the end of the adjusting rod 9 away from the extension member.

[0050] The extension component includes an extension plate 10, which is arranged in an arc shape. A first connecting rod 12 and a second connecting rod 13 with a scissor-like distribution are respectively hinged on the extension plate 10. The end of the first connecting rod 12 away from the extension plate 10 is hinged to the adjusting rod 9. A protrusion 11 is hinged to the end of the second connecting rod 13 away from the extension plate 10. The protrusion 11 can be inserted into the sliding groove 802 and slide in cooperation with the sliding groove 802.

[0051] It should be noted that: guide rods 5 are symmetrically arranged on the receiving frame 2 along the vertical direction, and two sets of sleeves 7 are connected on the lifting plate 3. The sleeves 7 are sleeved on the guide rods 5 and slidably connected to the guide rods 5 to ensure that the axial insert moves linearly along the axis of the clamped composite conductive connector when it is raised and lowered.

[0052] In the initial state, all the arc-shaped extension plates 10 are in a retracted state, and the overall outer diameter is smaller than the inner diameter of the internal cavity of the composite conductive connector.

[0053] During testing, the first electric telescopic rod 4 is activated. Under the sliding fit and constraint of the guide rod 5 and the sleeve 7, the lifting plate 3 is driven to descend smoothly, causing the hollow connecting rod 8 on it to simultaneously extend into the internal cavity of the workpiece. After reaching the position, the first electric telescopic rod 4 locks the current feed position, completing the precise positioning of the axial insertion station. Subsequently, the second electric telescopic rod 6 is activated, causing the adjusting rod 9 to undergo relative displacement along the axial direction inside the connecting rod 8. At this time, the first connecting rod 12, which is hinged to the adjusting rod 9, deflects at an angle with the axial movement, simultaneously causing the protrusion 11 at the end of the second connecting rod 13 to slide in the slide groove 802. The two sets of scissor-shaped first connecting rods 12 and second connecting rods 13 are simultaneously opened, opening the shaft. The driving force is completely converted into the radial outward thrust of the arc-shaped expansion plate 10. Multiple expansion plates 10, evenly arranged along the circumference, expand outward synchronously, eventually forming a uniform circumferential contact with the inner wall of the workpiece. While adapting to the inner cavities of workpieces of various specifications and inner diameters without damage, it achieves precise alignment and uniform circumferential tightening of the workpiece. After the expansion pressure reaches the preset threshold, the second electric telescopic rod 6 remains locked. At this time, the first electric telescopic rod 4 outputs axial pulling force in the opposite direction. Through the rigid transmission of the connecting rod 8 and the adjusting rod 9, a stable and controllable axial load is applied to the inner wall of the workpiece. While synchronously collecting the force value change throughout the process, it accurately captures the tiny relative displacement signal between the inner conductor and the outer insulation layer.

[0054] A quality inspection method for composite conductive connectors, using the quality inspection equipment for composite conductive connectors described in any one of the above claims, includes the following steps:

[0055] Step 1: Place the composite conductive connector to be tested coaxially between the clamping stations, start the deflection drive to drive the two sets of clamping units to move synchronously, and apply uniform clamping force from multiple directions around the workpiece through synchronous linkage circumferential clamping action to complete the centering and positioning clamping of the two ends of the composite conductive connector.

[0056] Step 2: After the composite conductive connector to be tested is clamped, the axial insertion component is driven to extend into the internal cavity of the composite conductive connector along the axis. After it is in place, the expansion and tightening contact component is driven to expand outward, forming a uniform circumferential surface contact with the inner cavity wall and applying a preset radial pressure.

[0057] Step 3: After the expansion joint is tightly pressed against the inner cavity wall, the axial insertion part is pulled back to apply a preset axial pulling force. The pressure change is collected in real time during the detection cycle, and it is determined whether the inner conductor of the composite conductive connector is separated from the outer insulation layer, and whether the bonding strength between the inner and outer layers of the composite conductive connector meets the qualified threshold. After the detection is completed, the expansion joint is first driven to radially contract and detach from the inner cavity wall, and then the axial insertion part is driven to completely withdraw from the workpiece. Finally, the circumferential clamping constraints at both ends are released, and the workpiece is taken out to complete the full process detection.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quality testing device for composite conductive connectors, comprising an electrical performance testing device, a mechanical performance testing device, an environmental adaptability testing device, and a material analysis testing device, wherein the mechanical performance testing device comprises a support base (1) and a receiving frame (2) disposed on the support base (1), characterized in that: The bottom of the receiving frame (2) is equipped with two sets of coaxially arranged clamping units. The two sets of clamping units can clamp and position the two ends of the composite conductive connector respectively. Both sets of clamping units are connected to the deflection drive installed on the receiving frame (2) and are synchronously driven by the deflection drive to complete the clamping posture adjustment. An axial insert is mounted on the receiving frame (2) and is coaxial with the clamping unit. The movable end of the axial insert is connected to a radially expandable and contractile tightening abutment. The axial insert can extend into the internal cavity of the composite conductive connector. After the tightening abutment expands uniformly outward along the circumference and forms an abutment with the inner cavity wall of the composite conductive connector and applies a preset pressure, the axial insert applies a preset axial pulling force to the inner cavity wall.

2. The quality inspection equipment for composite conductive connectors according to claim 1, characterized in that, The clamping unit includes a pad (17), which is installed at the bottom of the receiving frame (2). A turntable (15) is rotatably mounted on the pad (17). The pad (17) and the turntable (15) are coaxially arranged and both have through holes along the axial direction. An active space is formed between the pad (17) and the turntable (15) to accommodate multiple radially pushing members evenly arranged in the circumferential direction to clamp and position the composite conductive connector.

3. The quality inspection equipment for composite conductive connectors according to claim 2, characterized in that, The radial pusher includes a clamping block (18), a guide post is formed on the bottom end face of the clamping block (18), and a limiting post (1801) is formed on its top end face. A plurality of guide grooves (1701) are distributed circumferentially on the pad (17). The guide post can be inserted into the guide groove (1701) and slide with the guide groove (1701).

4. The quality inspection equipment for composite conductive connectors according to claim 3, characterized in that, The turntable (15) has a plurality of inclined grooves (1501) evenly distributed along the circumference. The limiting post (1801) can be inserted into the inclined groove (1501) and slide in cooperation with the inclined groove (1501). An extension plate is provided on the outer peripheral wall of the turntable (15) along the radial direction, and a limiting groove (1502) is formed on the extension plate.

5. The quality inspection equipment for composite conductive connectors according to claim 4, characterized in that, The deflection drive includes a third electric telescopic rod (14), one end of which is connected to the receiving frame (2), and the other end is rotatably connected to a push rod (16). The two ends of the push rod (16) can be inserted into the two limiting grooves (1502) respectively and slide relative to the limiting grooves (1502).

6. The quality inspection equipment for composite conductive connectors according to claim 1, characterized in that, The axial insert includes a lifting plate (3), which is slidably disposed on the receiving frame (2), and a connecting rod (8) is connected to the lifting plate (3). The connecting rod (8) has a hollow structure inside, and a plurality of sliders (801) are evenly distributed along the circumference at one end of the connecting rod (8). A groove (802) is formed on the slider (801). It also includes a first electric telescopic rod (4), which is installed on the support frame (2), and the movable rod of the first electric telescopic rod (4) is connected to the lifting plate (3).

7. The quality inspection equipment for composite conductive connectors according to claim 6, characterized in that, The expansion and tightening abutment includes an adjusting rod (9), which is coaxially arranged with the connecting rod (8) and slidably inserted into the connecting rod (8). Both ends of the adjusting rod (9) pass through the connecting rod (8), and multiple extension members are circumferentially connected between one end of the adjusting rod (9) and the connecting rod (8). It also includes a second electric telescopic rod (6), which is mounted on the lifting plate (3), and the movable rod of the second electric telescopic rod (6) is connected to the end of the adjusting rod (9) away from the extension member.

8. The quality inspection equipment for composite conductive connectors according to claim 7, characterized in that, The extension component includes an extension plate (10), which is arranged in an arc shape. A first connecting rod (12) and a second connecting rod (13) with a scissor-shaped distribution are respectively hinged on the extension plate (10). The end of the first connecting rod (12) away from the extension plate (10) is hinged to the adjusting rod (9). A protrusion (11) is hinged on the end of the second connecting rod (13) away from the extension plate (10). The protrusion (11) can be inserted into the sliding groove (802) and slides with the sliding groove (802).

9. A quality inspection method for composite conductive connectors, characterized in that, The quality inspection equipment for composite conductive connectors according to any one of claims 1-8 includes the following steps: Step 1: Place the composite conductive connector to be tested coaxially between the clamping stations, start the deflection drive to drive the two sets of clamping units to move synchronously, and apply uniform clamping force from multiple directions around the workpiece through synchronous linkage circumferential clamping action to complete the centering and positioning clamping of the two ends of the composite conductive connector. Step 2: After the composite conductive connector to be tested is clamped, the axial insertion component is driven to extend into the internal cavity of the composite conductive connector along the axis. After it is in place, the expansion and tightening contact component is driven to expand outward, forming a uniform circumferential surface contact with the inner cavity wall and applying a preset radial pressure. Step 3: After the expansion joint is tightly pressed against the inner cavity wall, the axial insertion part is pulled back to apply a preset axial pulling force. The pressure change is collected in real time during the detection cycle, and it is determined whether the inner conductor of the composite conductive connector is separated from the outer insulation layer, and whether the bonding strength between the inner and outer layers of the composite conductive connector meets the qualified threshold. After the detection is completed, the expansion joint is first driven to radially contract and detach from the inner cavity wall, and then the axial insertion part is driven to completely withdraw from the workpiece. Finally, the circumferential clamping constraints at both ends are released, and the workpiece is taken out to complete the full process detection.

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