A device and method for testing fretting corrosion of electrical connector terminals

Abstract

The present invention discloses a fretting corrosion test device and method for electric connector terminals, which belongs to the technical field of test devices and is used to solve the technical problem that there is a lack of high-precision micron-level relative movement of the terminals, which leads to differences in corrosion damage between the terminals of the electric connectors during test and in actual use, thus affecting the overall test results. The present invention comprises a test body, a slide is arranged inside the test body, a clamping assembly is slidingly arranged at the center of the top of the slide, the clamping assembly comprises a bracket, and a plurality of groups of limit grooves are recessed in the top surface of the bracket. Therefore, the present invention can effectively improve the real-time fretting corrosion test efficiency and detection accuracy of the electronic components of the electric connector by the overall device, and utilize a connecting rod to convert the downward power of the regulating cylinder into a rotational force, thereby forming a symmetrical sliding limit adaptive clamping on both sides of the local rod section, so as to realize multiple adaptive pneumatic clamping of terminals of electric connectors of different models.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a device and method for testing fretting corrosion of electrical connector terminals. Background Art

[0002] Under the influence of mechanical vibration, electromagnetic vibration, fatigue load or thermal cycle, the mating parts such as electrical connector terminals undergo relative movement of micrometers, causing material wear or fatigue cracks, which is usually called fretting damage. Fretting is very common in industry and is one of the culprits of catastrophic accidents of many mechanical parts.

[0003] The hazards of fretting corrosion: Fretting motion is usually less than 0.005 inches. Under appropriate circumstances, almost all materials that oxidize are at risk of fretting corrosion. Fretting corrosion often occurs during the interconnection of electronic connectors, causing a variety of problems;

[0004] For example: First, fretting corrosion in the interconnection of electronic connectors will cause repeated thermal drift problems in the connectors; Second, fretting corrosion in the interconnection of electronic connectors will affect the normal operation of the connector's digital signals, analog signals, power, mechanical systems, etc., and in severe cases will cause the connector to fail on the spot, affecting the performance of the connector;

[0005] In combination with the above content, it should be explained that: during the micro-motion anti-corrosion testing process, traditional electrical connector terminals are only subjected to simulation tests of various environments, and lack high-precision relative movement at the micron level, which leads to differences in corrosion damage between the electrical connector terminals during testing and actual use, affecting the overall test results; at the same time, they are also affected by the thickness and shape of the rod sections of various types of electrical connector terminals, resulting in the need to constantly replace the matching fixtures during the test of the electrical connector terminals, which not only affects the overall test efficiency, but also easily leads to greater wear in the test device area, affecting the service life of related components, and even causing some structural installation structures to become loose, which interferes with the accuracy of subsequent continuous test results of the electrical connector terminals;

[0006] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0007] The purpose of the present invention is to provide a micro-motion corrosion test device and method for electric connector terminals, so as to solve the problem that in the process of micro-motion anti-corrosion detection of traditional electric connector terminals, they are only subjected to simulation tests of various environments, lack high-precision relative movement of the terminals at the micron level, which leads to differences in corrosion damage between the test and actual use of the electric connector terminals, affecting the overall test results; at the same time, they are also affected by the thickness and shape of the rod sections of various types of electric connector terminals, resulting in the need to continuously replace the matching fixtures when the electric connector terminals are tested, which not only affects the overall test efficiency, but also easily leads to greater wear in the test device area, affecting the service life of related components, and even causing some structural installation structures to become loose, etc., which interferes with the accuracy of subsequent continuous detection results of the electric connector terminals.

[0008] The purpose of the present invention can be achieved through the following technical solutions: an electric connector terminal fretting corrosion test device, comprising a test body, a slide frame is set inside the test body, a clamping assembly is slidably set at the center of the top of the slide frame, the clamping assembly comprises a bracket, a plurality of groups of limit grooves are recessed on the top surface of the bracket, and oblique grooves are symmetrically opened on the inner walls at both ends of the limit grooves, a high-precision servo electric cylinder is sleeved under the bracket, a plurality of groups of guide blocks close to the slide frame are set at the bottom of the high-precision servo electric cylinder, and a lower pressing frame is slidably sleeved on the top of the bracket;

[0009] An adjusting cylinder embedded in the bracket is provided at the bottom of one end of the lower pressure frame, a pressure column extending into the limit groove is provided at the bottom center of the lower pressure frame, and a ball cover pad is sleeved on the bottom of the pressure column, a side limit clamp slidably connected to the inclined groove is provided below the pressure column, the side limit clamp includes a side slider, a storage bin fixed to the bottom of the bracket is provided below the side slider, and a linkage component that penetrates the bracket and is sleeved with the adjusting cylinder is provided on the side of the storage bin.

[0010] Preferably, the inner walls on both sides of the test body are provided with experimental cabins which are sleeved on the top of the slide, and the inner walls on both sides of the test body are provided with lifting cylinders connected with the slide, guide rails are symmetrically provided at both ends of the top of the slide, wire grooves are symmetrically opened on both sides of the top of the test body, and an observation cover is hinged on the outer wall of the top of the test body.

[0011] Preferably, a fine-tuning slider is provided at the bottom of the bracket and is sleeved with a high-precision servo electric cylinder. A rotary cylinder is provided at the bottom of the high-precision servo electric cylinder and is sleeved with multiple groups of guide block inner walls. Multiple groups of guide blocks are slidably sleeved with guide rails. A soft pad is clamped on the inner wall of the bottom of the limit groove, and multiple groups of lifting cylinders are symmetrically embedded at the bottom of both ends of the soft pad.

[0012] Preferably, a limit rod is slidably sleeved on one side of the lower pressure frame, and the bottom of the limit rod is fixedly connected to the bracket, a central cylinder is embedded in the center of the bottom of the pressure column, and a traction pad connected to the inner wall of the bottom of the ball cover pad is provided at the bottom of the central cylinder, multiple groups of side cylinders are symmetrically arranged at both ends of the central cylinder, and spherical inner pads extending to the two ends of the inside of the ball cover pad are provided at the bottom of the side cylinders, and guide rods fixedly connected to the bracket are arranged side by side on the sides of the adjusting cylinder.

[0013] Preferably, the side limit clamp is provided with multiple groups of side rails symmetrically fixed inside the limit groove, the side slider is slidably sleeved with the side rails, and the end of the side slider away from the side rail is clamped and installed with a side clamp block, the bottom of the side rail is provided with a guide wheel close to the storage bin, and the guide wheel is embedded in the inner wall of the bracket, a winding roller is rotatably installed inside the storage bin, and a spiral spring is sleeved on the shaft of the winding roller, and a traction line is provided on the surface of the winding roller, which passes through the guide wheel and is connected to the side slider.

[0014] Preferably, the linkage assembly includes a connecting rod, a ring is provided on the top of the connecting rod and is sleeved with the movable rod at the top of the adjusting cylinder, a rack is provided at the bottom of the connecting rod and is close to the storage bin, a driven gear is meshed on the side of the rack, a first disk is provided on the end of the driven gear away from the rack, and a second disk is arranged side by side on the side of the first disk, a sealing sleeve is provided on the outside of the first disk and the second disk, and a transmission gear meshed with the shaft of the winding roller is provided on the end of the second disk away from the first disk.

[0015] A working method of a fretting corrosion test device for electrical connector terminals comprises the following steps:

[0016] Step 1: When in use, move the electrical connector terminal to be tested to the top of the clamping assembly, then gently and steadily place the electrical connector terminal to be tested into the limiting groove, and adjust the position of the fixed rod section to the clamping area close to the limiting groove;

[0017] Step 2: The lower pressure frame is driven by the regulating cylinder to slide down and approach the bracket, and the lower pressure frame slides along the surface of the limit rod and the guide rod. The pressure column moves down with the lower pressure frame and approaches the terminal rod section of the electrical connector to be tested. The ball cover pad initially abuts against it and clamps the rod section from top to bottom in an adaptively wrapped limit clamping manner. Multiple sets of side cylinders drive the spherical inner pad to extend downward until the spherical inner pad drags the inner walls on both sides of the ball cover pad to cover both sides of the rod section and abut against the soft pad;

[0018] Step 3: When the adjusting cylinder drives the lower pressure frame to move downward, the collar moves with the movable rod of the adjusting cylinder to drive the connecting rod to move downward synchronously, and the linkage drives the rack to move downward. During the downward movement of the rack, the rack meshes with the driven gear. The driven gear drives the first disk to rotate and the second disk to rotate synchronously. The second disk meshes with the shaft of the winding roller through the transmission gear. The winding roller rotates along the storage bin to wind up the traction line. The traction line pulls the side slider after being driven by the guide wheel. The side slider drives the side clamping block to gradually approach the rod section, and the distance between the side clamping blocks gradually decreases until they abut against the rod section, and symmetrically slide along the side to limit the position and adaptively clamp it.

[0019] Step 4: While the lower pressure frame and the side limit clamp are linked to clamp the rod section, the movable rod of the lifting cylinder moves upward and lifts up the bulges on both sides of the cushion, forming a groove of the arc-shaped limit rod section on the top of the cushion, which abuts against the bottom of both sides of the ball cover cushion. After the electrical connector terminal to be tested is fixed by the hedge adaption limit type, close the observation cover, start the test body, the lifting cylinder drives the slide to slide down, and the guide block drives the clamping assembly to move along the guide rail close to the experimental cabin to complete the micro-corrosion test of the electrical connector terminal to be tested.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention uses a clamping assembly in conjunction with a test machine structure, uses a high-precision servo electric cylinder and a bracket to make a micron-level relative movement of the diversified adaptive clamping and limiting electrical connector terminals, and with the assistance of the test machine, forms a subsequent continuous monitoring and simulation test, effectively improving the efficiency and detection accuracy of the overall device for real-time micro-motion corrosion testing of electrical connector terminals;

[0022] The present invention also uses a lower pressure frame in conjunction with a clamping assembly to use a ball cover pad to perform a top-down covering type adaptive limit clamping on the rod section area of ​​the electrical connector terminal, and combines the lifting cylinder in the limit groove and the soft pad to form a rod section adaptive groove that is lifted from bottom to top, and the two are linked to form a downward soft covering adaptive pneumatic clamping of a local area of ​​the rod section;

[0023] The present invention also drives the side limit clamp to operate in linkage with the lower pressure frame structure through a linkage component, and utilizes a connecting rod to convert the downward power of the adjusting cylinder into a rotational force, thereby driving the winding roller to rotate synchronously and pull the side clamp to move, thereby forming a symmetrical sliding limit adaptive clamping on both sides of the rod section, so as to realize multiple adaptive pneumatic clamping of electrical connector terminals of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings;

[0025] Figure 1 It is a stereogram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the top cross-sectional structure of the test machine body of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the clamping assembly of the present invention;

[0028] Figure 4 It is a schematic diagram of the connection structure between the limit groove and the lower pressing frame of the present invention;

[0029] Figure 5 It is a schematic diagram of the connection structure between the limit groove and the side limit clamp of the present invention;

[0030] Figure 6 It is a schematic diagram of the top cross-sectional structure of the limiting groove of the present invention;

[0031] Figure 7 It is a schematic diagram of the cross-sectional structure of the regulating cylinder and the linkage assembly of the present invention;

[0032] Figure 8 It is a schematic diagram of the side sectional structure of the linkage assembly of the present invention.

[0033] Legend: 1. Test machine body; 101. Experimental cabin; 102. Slide; 103. Guide rail; 104. Wire guide; 2. Observation cover; 3. Clamping assembly; 301. Bracket; 302. Fine adjustment slider; 303. High-precision servo electric cylinder; 304. Rotary cylinder; 305. Guide block; 306. Inclined groove; 307. Soft cushion; 308. Lifting cylinder; 309. Limiting groove; 4. Lower pressure frame; 401. Limiting rod; 402. Pressure column; 403. Center cylinder; 404. Side cylinder; 405. 5. Guide rod; 406. Adjusting cylinder; 407. Ball cover pad; 408. Spherical inner pad; 409. Traction pad; 5. Side limit clamp; 501. Side slider; 502. Side clamp block; 503. Side rail; 504. Guide wheel; 505. Traction line; 506. Storage bin; 507. Winding roller; 6. Linkage assembly; 601. Connecting rod; 602. Ring; 603. Rack; 604. Driven gear; 605. Sealing sleeve; 606. First magnetic disk; 607. Second magnetic disk; 608. Transmission gear. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0035] This embodiment is used to solve the problem that, during the micro-motion anti-corrosion testing process, traditional electrical connector terminals are only subjected to simulation tests in various environments, and lack high-precision relative movement at the micron level, which leads to differences in corrosion damage between the electrical connector terminals during testing and in actual use, affecting the overall test results.

[0036] See also Figure 1 - Figure 5 As shown, the present embodiment is a micro-motion corrosion test device for electric connector terminals, comprising a test body 1, a slide 102 is arranged inside the test body 1, a clamping assembly 3 is slidably arranged at the center of the top of the slide 102, the clamping assembly 3 comprises a bracket 301, a top surface of the bracket 301 is recessed and provided with a plurality of groups of limit grooves 309, and the inner walls at both ends of the limit grooves 309 are symmetrically provided with oblique grooves 306, a high-precision servo electric cylinder 303 is sleeved at the bottom of the bracket 301, a plurality of groups of guide blocks 305 close to the slide 102 are arranged at the bottom of the high-precision servo electric cylinder 303, and a lower pressing frame 4 is slidably sleeved at the top of the bracket 301; when in use, the electric connector terminal to be tested is moved to the top of the clamping assembly 3, the connecting wires at both ends thereof are passed through between the lower pressing frame 4 and the bracket 301, and clamped in the wire groove 104, and then the electric connector terminal to be tested is smoothly and gently placed in the limit groove 309, and the position of the fixed rod section thereof is adjusted to the clamping area close to the limit groove 309;

[0037] The inner walls on both sides of the test body 1 are provided with experimental cabins 101 sleeved on the top of the slide 102, and the inner walls on both sides of the test body are provided with lifting cylinders connected to the slide 102, and the guide rails 103 are symmetrically provided at both ends of the top of the slide 102, and the wire grooves 104 are symmetrically opened on both sides of the top of the test body 1, and the observation cover 2 is hinged on the outer wall of the top of the test body 1; the bottom of the bracket 301 is provided with a fine-tuning slider 302 sleeved with a high-precision servo electric cylinder 303, and the bottom of the high-precision servo electric cylinder 303 is provided with a rotary cylinder 304 sleeved with the inner wall of multiple groups of guide blocks 305, and the multiple groups of guide blocks 305 are slidably sleeved with the guide rail 103, and a soft pad 307 is clamped on the inner wall of the bottom of the limit groove 309, and multiple groups of lifting cylinders 308 are symmetrically embedded at the bottom of both ends of the soft pad 307;

[0038] During the period when the lower pressure frame 4 and the side limit clamp 5 are linked to clamp the rod section, the movable rod of the lifting cylinder 308 moves upward and lifts up the two sides of the soft pad 307 to bulge upward, forming a groove of the arc-shaped limit rod section on the top of the soft pad 307, which abuts against the bottom of the two sides of the ball cover pad 407. After the electrical connector terminal to be tested is fixed by the offset adaption limit type, the observation cover 2 is closed, the test body 1 is started, the lifting cylinder drives the slide 102 to slide down, and the guide block 305 drives the clamping assembly 3 to move along the guide rail 103 close to the experimental cabin 101, completing the micro-corrosion test of the electrical connector terminal to be tested. Embodiment 2

[0039] The present embodiment is used to solve the problem that due to the thickness and shape of the terminal rod sections of various types of electrical connectors, the electrical connector terminals need to be constantly replaced with matching fixtures during testing. This not only affects the overall test efficiency, but also easily leads to greater wear in the test device area, affecting the service life of related components, and even causing some structural installation structures to become loose, thereby interfering with the accuracy of subsequent continuous testing results of the electrical connector terminals.

[0040] See also Figure 1 , Figure 4 - Figure 8 As shown, the fretting corrosion test device for the terminals of the electrical connector of the present embodiment comprises an adjusting cylinder 406 embedded in the bracket 301 at the bottom of one end of the lower pressing frame 4, a pressing column 402 extending into the limiting groove 309 is arranged at the center of the bottom of the lower pressing frame 4, and a ball cover pad 407 is sleeved at the bottom of the pressing column 402, a side limit fixture 5 slidably connected to the inclined groove 306 is arranged below the pressing column 402, and the side limit fixture 5 comprises a side slider 501, and a storage bin 506 fixed to the bottom of the bracket 301 is arranged below the side slider 501, and a linkage assembly 6 penetrating the bracket 301 and sleeved with the adjusting cylinder 406 is arranged on the side of the storage bin 506;

[0041] A limit rod 401 is slidably sleeved on one side of the lower pressure frame 4, and the bottom of the limit rod 401 is fixedly connected to the bracket 301, a central cylinder 403 is embedded in the center of the bottom of the pressure column 402, and a traction pad 409 connected to the bottom inner wall of the ball cover pad 407 is arranged at the bottom of the central cylinder 403, and a plurality of side cylinders 404 are symmetrically arranged at both ends of the central cylinder 403, and a spherical inner pad 408 extending to the inner ends of the ball cover pad 407 is arranged at the bottom of the side cylinder 404, and a guide rod 405 fixedly connected to the bracket 301 is arranged side by side on the side of the adjusting cylinder 406; the lower pressure frame 4 is driven by the adjusting cylinder 406 to slide down and approach the bracket 301, The lower pressing frame 4 slides along the surface of the limit rod 401 and the guide rod 405, and the pressing column 402 slides down with the lower pressing frame 4 and approaches the terminal rod section of the electrical connector to be tested, and the ball cover pad 407 initially contacts it, and the central cylinder 403 starts to shrink accordingly. The central cylinder 403 pulls the bottom center of the ball cover pad 407 inward through the traction pad 409, so that the bottom of the ball cover pad 407 forms an arc-shaped groove, and the rod section is clamped from top to bottom in an adaptive limit-wrapped manner, and multiple groups of side cylinders 404 drive the spherical inner pad 408 to extend downward until the spherical inner pad 408 drags the inner walls on both sides of the ball cover pad 407 to cover both sides of the rod section and contact the soft pad 307;

[0042] The side limit clamp 5 is provided with a plurality of side rails 503 symmetrically fixed inside the limit groove 309, the side slider 501 is slidably sleeved with the side rails 503, and the end of the side slider 501 away from the side rail 503 is clamped and installed with a side clamp block 502, and the bottom of the side rail 503 is provided with a guide wheel 504 close to the storage bin 506, and the guide wheel 504 is embedded in the inner wall of the bracket 301, and a winding roller 507 is rotatably installed inside the storage bin 506, and a spiral spring is sleeved on the shaft of the winding roller 507, and a traction line 505 that passes through the guide wheel 504 and is connected to the side slider 501 is provided on the surface of the winding roller 507;

[0043] The linkage assembly 6 includes a connecting rod 601, a collar 602 is provided on the top of the connecting rod 601 and is sleeved with the top movable rod of the regulating cylinder 406, a rack 603 is provided at the bottom of the connecting rod 601 and is close to the storage bin 506, a driven gear 604 is meshed with the side of the rack 603, a first disk 606 is provided at one end of the driven gear 604 away from the rack 603, and a second disk 607 is arranged side by side on the side of the first disk 606, a sealing sleeve 605 is provided on the outside of the first disk 606 and the second disk 607, and a transmission gear 608 meshed with the shaft of the winding roller 507 is provided at one end of the second disk 607 away from the first disk 606;

[0044] During the period when the adjusting cylinder 406 drives the lower pressure frame 4 to move downward, the ring 602 moves with the movable rod of the adjusting cylinder 406 to drive the connecting rod 601 to slide downward synchronously, and the linkage drives the rack 603 to slide downward. During the downward movement of the rack 603, it meshes with the driven gear 604. The driven gear 604 drives the first magnetic disk 606 to rotate. The first magnetic disk 606 drives the second magnetic disk 607 to rotate synchronously through magnetic force. The second magnetic disk 607 meshes with the shaft of the winding roller 507 through the transmission gear 608. The winding roller 507 rotates along the storage bin 506 to wind up the traction line 505. The traction line 505 is driven by the guide wheel 504 to pull the side slider 501. The side slider 501 moves along the side rail 503 along the side groove. The side slider 501 drives the side clamping block 502 to gradually approach the rod section, and the distance between the side clamping blocks 502 gradually decreases until they abut against the rod section, and symmetrically slide along the side to limit the adaptive clamping.

[0045] In combination with Example 1 and Example 2, the high-precision servo electric cylinder 303 and the bracket 301 can be used to make the diversified adaptive clamping and limiting electrical connector terminals perform micron-level relative movement, effectively improving the real-time micro-motion corrosion test efficiency and detection accuracy of the electrical connector terminals by the overall device, and the ball cover pad 407 can be used to perform a top-down covering adaptive limiting clamping on the rod section area of ​​the electrical connector terminal, and the connecting rod 601 is used to convert the downward sliding power of the adjusting cylinder 406 into a rotational force, thereby forming a symmetrical sliding limiting adaptive clamping on both sides of the local rod section, so as to realize multiple adaptive pneumatic clamping of electrical connector terminals of different models.

[0046] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fretting corrosion test device for electrical connector terminals, comprising a test body (1), characterized in that: The test machine body (1) is provided with a slide (102) inside, a clamping assembly (3) is slidably provided at the top center of the slide (102), the clamping assembly (3) comprises a bracket (301), a top surface of the bracket (301) is recessed with a plurality of limit grooves (309), and the inner walls at both ends of the limit grooves (309) are symmetrically provided with oblique grooves (306), a high-precision servo electric cylinder (303) is sleeved at the bottom of the bracket (301), a plurality of guide blocks (305) close to the slide (102) are provided at the bottom of the high-precision servo electric cylinder (303), and a lower pressing frame (4) is slidably sleeved at the top of the bracket (301); The bottom of one end of the lower pressure frame (4) is provided with an adjusting cylinder (406) embedded in the bracket (301); the center of the bottom of the lower pressure frame (4) is provided with a pressure column (402) extending into the limiting groove (309); the bottom of the pressure column (402) is provided with a ball cover pad (407); a side limit clamp (5) slidably connected to the inclined groove (306) is provided below the pressure column (402); the side limit clamp (5) includes a side slider (501); a storage bin (506) fixed to the bottom of the bracket (301) is provided below the side slider (501); a linkage component (6) penetrating the bracket (301) and sleeved with the adjusting cylinder (406) is provided on the side of the storage bin (506); The side limit clamp (5) is provided with a plurality of side rails (503) symmetrically fixed inside the inclined groove (306); the side slider (501) is slidably sleeved with the side rails (503); one end of the side slider (501) away from the side rails (503) is clamped and installed with a side clamp block (502); a guide wheel (504) close to the storage bin (506) is provided at the bottom of the side rail (503); the guide wheel (504) is embedded in the inner wall of the bracket (301); a winding roller (507) is rotatably installed inside the storage bin (506); a spiral spring is sleeved on the shaft of the winding roller (507); and a traction line (505) is provided on the surface of the winding roller (507) that passes through the guide wheel (504) and is connected to the side slider (501); The linkage assembly (6) comprises a connecting rod (601), the top of the connecting rod (601) is provided with a collar (602) sleeved with a movable rod at the top of the regulating cylinder (406), the bottom of the connecting rod (601) is provided with a rack (603) close to the storage bin (506), the side of the rack (603) is meshed with a driven gear (604), the end of the driven gear (604) away from the rack (603) is provided with a first disk (606), and the side of the first disk (606) is provided with a second disk (607) arranged side by side, the first disk (606) and the second disk (607) are sleeved with a sealing sleeve (605) on the outside, and the end of the second disk (607) away from the first disk (606) is provided with a transmission gear (608) meshed with the shaft of the winding roller (507); The traction line (505) is driven by the guide wheel (504) to pull the side slider (501), and the side slider (501) moves along the side rail (503) and in the side groove. The side slider (501) drives the side clamping block (502) to gradually approach the rod section, and the distance between the side clamping blocks (502) gradually decreases until they abut against the rod section, and symmetrically slide along the side edge to limit the position and adaptively clamp it.

2. The electrical connector terminal fretting corrosion test device according to claim 1, characterized in that: The inner walls on both sides of the test body (1) are provided with experimental cabins (101) which are sleeved on the top of the slide (102), and the inner walls on both sides of the test body are provided with lifting cylinders connected to the slide (102), and guide rails (103) are symmetrically arranged at both ends of the top of the slide (102), and wire grooves (104) are symmetrically opened on both sides of the top of the test body (1), and an observation cover (2) is hinged on the outer wall of the top of the test body (1).

3. The electrical connector terminal fretting corrosion test device according to claim 2, characterized in that: The bottom of the bracket (301) is provided with a fine-tuning slider (302) sleeved with a high-precision servo electric cylinder (303), the bottom of the high-precision servo electric cylinder (303) is provided with a rotary cylinder (304) sleeved with the inner wall of multiple groups of guide blocks (305), the multiple groups of guide blocks (305) are slidably sleeved with the guide rail (103), a soft pad (307) is clamped on the inner wall of the bottom of the limit groove (309), and multiple groups of lifting cylinders (308) are symmetrically embedded at the bottom of both ends of the soft pad (307).

4. The electrical connector terminal fretting corrosion test device according to claim 1, characterized in that: A limiting rod (401) is slidably sleeved on one side of the lower pressure frame (4), and the bottom of the limiting rod (401) is fixedly connected to the bracket (301). A central cylinder (403) is embedded in the center of the bottom of the pressure column (402), and a traction pad (409) connected to the bottom inner wall of the ball cover pad (407) is arranged at the bottom of the central cylinder (403). Multiple groups of side cylinders (404) are symmetrically arranged at both ends of the central cylinder (403), and spherical inner pads (408) extending to the inner ends of the ball cover pad (407) are arranged at the bottom of the side cylinders (404). Guide rods (405) fixedly connected to the bracket (301) are arranged side by side on the side of the adjustment cylinder (406).

5. A working method of a fretting corrosion test device for electrical connector terminals, used in the fretting corrosion test device for electrical connector terminals according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Move the electrical connector terminal to be tested to the top of the clamping assembly (3), then gently and steadily place the electrical connector terminal to be tested into the limiting groove (309), and adjust the position of the fixed rod section to a clamping area close to the limiting groove (309); Step 2: The lower pressing frame (4) is driven by the regulating cylinder (406) to slide down and approach the bracket (301), and the lower pressing frame (4) slides along the surface of the limit rod (401) and the guide rod (405). The pressing column (402) slides down with the lower pressing frame (4) and approaches the terminal rod section of the electrical connector to be tested. The ball cover pad (407) initially abuts against it and clamps the rod section from top to bottom in an adaptively wrapped limit clamping manner. Multiple sets of side cylinders (404) drive the spherical inner pad (408) to extend downward until the spherical inner pad (408) drags the inner walls on both sides of the ball cover pad (407) to cover both sides of the rod section and abut against the soft pad (307); Step 3: When the adjusting cylinder (406) drives the lower pressing frame (4) to move downward, the collar (602) moves with the movable rod of the adjusting cylinder (406) to drive the connecting rod (601) to move downward synchronously, and the connecting rod (601) drives the rack (603) to move downward. During the process of the rack (603) moving downward, it meshes with the driven gear (604), and the driven gear (604) drives the first magnetic disk (606) to rotate and the second magnetic disk (607) to rotate synchronously. The second magnetic disk (607) is driven by the transmission The moving gear (608) meshes with the shaft of the winding roller (507) for transmission, and the winding roller (507) rotates inside the storage bin (506) to wind up the traction line (505). The traction line (505) is driven by the guide wheel (504) to pull the side slider (501), and the side slider (501) drives the side clamping block (502) to gradually approach the rod section, and the distance between the side clamping blocks (502) gradually decreases until they abut against the rod section, and symmetrically slide along the side edge to limit the position and adaptively clamp it; Step 4: While the lower pressure frame (4) and the side limit clamp (5) are linked to clamp the rod section, the movable rod of the lifting cylinder (308) moves upward and lifts up the two sides of the soft pad (307) to bulge upward, forming a groove of the arc-shaped limit rod section at the top of the soft pad (307), which abuts against the bottom of the two sides of the ball cover pad (407). After the electrical connector terminal to be tested is fixed by the offset adaption limit type, the observation cover (2) is closed, the test body (1) is started, the lifting cylinder drives the slide (102) to slide down, and the guide block (305) drives the clamping assembly (3) to move along the guide rail (103) close to the experimental chamber (101), completing the micro-corrosion test of the electrical connector terminal to be tested.

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