Positioning structure for torsion test of pressing rivet nut

Abstract

The invention relates to the technical field of pressing rivet nut testing, in particular to a positioning structure for pressing rivet nut torsion testing, which comprises a pressing rivet nut testing, positioning and mounting disc, and a pressing rivet nut workpiece mounting table is fixedly mounted in the middle of the pressing rivet nut testing, positioning and mounting disc; the pressing rivet nut torque testing device has the beneficial effects that the pressing rivet nut workpiece mounting table is matched with the workpiece positioning structure, so that basic positioning and fixing of a pressing rivet nut torque testing workpiece can be achieved, the positioned and fixed workpiece is locked through the locking anti-falling structure, and a torque wrench is fixed through the torque wrench positioning structure; meanwhile, the locking anti-falling structure is in linkage with the locking anti-falling structure through an arc-shaped gear ring, a locking gear and a rack, when the pressing rivet nut is wrenched for torque testing and deflects, the triangular locking frame is reversely pushed for re-locking, position correction is conducted on deflection caused by too large torsional force, and the situation that a workpiece continues to loosen, and the nut torque testing result is affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of self-clinching nut testing, and in particular to a positioning structure for self-clinching nut torque testing. Background Art

[0002] A self-clinching nut (also called a press-in nut or a press-fit nut) is a nut that is fixed to a sheet or workpiece by pressing or pressing. This nut is widely used in the fields of automobiles, home appliances, electronic equipment, aerospace, etc., because it can provide reliable connections and high vibration resistance. It can be used to connect body sheet metal parts to provide a reliable fixing point, or to fix interiors, such as dashboards and door panels. After processing, self-clinching nuts are generally subjected to self-clinching nut torque testing to verify the fastening performance and anti-loosening ability of the nut after self-clinching. Through torque testing, the reliability and durability of self-clinching nuts in actual use can be ensured. The test process is to select a suitable self-clinching nut and a workpiece to be tested (such as a steel plate), and use a self-clinching tool to press the nut into the workpiece to be tested to ensure that the nut is firmly fixed to the workpiece. Then use the positioning structure to fix the workpiece with the rivet nut installed on the test bench to ensure the stability and accurate position of the workpiece and to ensure that the workpiece and the nut will not move or loosen during the test. Then, according to the specifications and usage requirements of the nut, select the appropriate test torque and apply the torque. Use a torque wrench to gradually apply the torque until the predetermined test torque value is reached. Record the applied torque value. After applying the torque, check whether the nut is loose or falls off. If the nut is loose or falls off, record the test results. In the prior art, general positioning structures use positioning pins or hydraulic fixing structures. The positioning pins may not provide sufficient rigidity. Especially when testing high torques, the workpiece may move or deform slightly, affecting the accuracy of the test results. Pressure fluctuations in the hydraulic system may affect the fixing effect of the workpiece, resulting in unstable test results.

[0003] The existing Chinese patent document with publication number CN107443276B proposes a positioning structure for torque testing of rivet nuts, which solves the above technical problems by providing a mounting screw hole on the base, a connecting cavity at the center of the top surface of the base, and an arc-shaped locking groove on the top surface of the base. The connecting structure includes a connecting seat and a support rod fixed at the center of the bottom end of the connecting seat, a positioning hole with a side opening and connected to the connecting cavity is provided in the base, a positioning pin is provided in the positioning hole, a U-shaped clamp slot with one end open and the other end closed is provided on the top surface of the connecting seat, an I-shaped clamp block is provided at the bottom of the clamp body, and an arc plate is provided in the arc-shaped locking groove to assist in positioning the workpiece. Although the design of the arc-shaped locking groove and the arc-shaped plate can provide a certain flexibility, it may also cause a slight displacement of the workpiece during the fixing process, affecting the stability of the test results.

[0004] Therefore, the present invention proposes a positioning structure for torque testing of self-clinching nuts, which solves the problem in the prior art that general positioning fixtures will be displaced due to high torque testing and affect the stability of test results. A high-strength positioning fixture designed to be compatible with torque testing is used, which can not only clamp and fix the self-clinching nuts after installation, but also assist in positioning the operating direction of the torque wrench. Summary of the invention

[0005] The object of the present invention is to provide a positioning structure for torque testing of a rivet nut to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning structure for torque testing of self-riveting nuts, comprising a self-riveting nut testing positioning mounting plate, a self-riveting nut workpiece mounting platform is fixedly installed in the middle of the self-riveting nut testing positioning mounting plate, a workpiece positioning structure and a locking and anti-falling structure are arranged above the self-riveting nut workpiece mounting platform, a torque wrench positioning structure is arranged on one side of the self-riveting nut workpiece mounting platform, the workpiece positioning structure comprises a movable connecting plate and a workpiece positioning clamp block, the locking and anti-falling structure comprises a triangular locking frame, and the torque wrench positioning structure comprises a wrench fixing seat.

[0007] Preferably, the movable connecting plate is symmetrically and slidably mounted on the upper surface of the rivet nut workpiece mounting platform, a driving component for driving the movable connecting plate to move is provided on one side of the rivet nut workpiece mounting platform, and a limiting rod adapted to the movable connecting plate is provided on the other side of the rivet nut workpiece mounting platform.

[0008] Preferably, the workpiece positioning clamp is symmetrically fixedly installed in the middle of the movable connecting plate, the inner surface of the workpiece positioning clamp is provided with a right-angle anti-slip pad, and the outer surface of the workpiece positioning clamp is provided with a locking protrusion.

[0009] Preferably, a sliding connection plate is fixedly installed between the right-angle anti-slip pad and the locking protrusion, and a sliding groove adapted to the sliding connection plate is opened on the upper inner wall of the workpiece positioning clamp, and an elastic pad is arranged inside the sliding groove.

[0010] Preferably, the triangular locking frame is symmetrically arranged on both sides of the movable connecting plate, the upper surface of the rivet nut workpiece mounting table is provided with a slide groove adapted to the triangular locking frame, and the side wall of the triangular locking frame is provided with a locking groove adapted to the locking protrusion.

[0011] Preferably, a rack is fixedly installed at the lower part of one side of the triangular locking frame, and a driving component 2 for driving the triangular locking frame to move is provided at the lower part of the other side of the triangular locking frame, the racks are symmetrically arranged, and a locking gear is provided between the racks. The locking gear is rotatably installed on the lower surface of one side of the rivet nut workpiece mounting platform, and the upper part of the outer side surface of the locking gear is meshed with the side surface of the rack.

[0012] Preferably, an arc-shaped gear ring is arranged on the outer side of the locking gear, a rotating shaft is fixedly installed on the upper side of one side of the arc-shaped gear ring, the rotating shaft is rotatably installed on one side of the rivet nut workpiece mounting table, and a rotating disk is fixedly installed on the top of the rotating shaft.

[0013] Preferably, the torque wrench positioning structure also includes an offset sliding rail fixedly mounted on one side of the upper surface of the rivet nut workpiece mounting platform, a sliding cavity adapted to the size of the insertion rod is provided at the bottom of the wrench fixing seat, a reset elastic support plate is fixedly mounted on one side of the interior of the offset sliding rail, a movable base is slidably mounted on the interior of the offset sliding rail, and one side surface of the movable base is fixedly connected to one end of the reset elastic support plate.

[0014] Preferably, a wrench fixing seat is fixedly installed in the middle of the movable base, a mounting base is slidably installed in the middle of the wrench fixing seat, reset spring support rods are symmetrically fixedly installed on both sides of the lower surface of the mounting base, the lower end of the reset spring support rod is fixedly connected to the inner wall of the wrench fixing seat, an insertion rod is symmetrically fixedly installed in the middle of the lower surface of the mounting base, and the upper surface of the rotating disk is evenly distributed with holes matching the insertion rods.

[0015] Preferably, locking clamps are hingedly mounted on both sides of the mounting base, movable grooves adapted to the locking clamps are provided on both sides of the wrench fixing base, and an extrusion anti-slip pad is fixedly mounted on the upper inner side wall of the locking clamp.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can position and fix the base of the rivet nut torque test workpiece by cooperating with the rivet nut workpiece mounting table and the workpiece positioning structure, and use the locking anti-falling structure to lock the workpiece after positioning and fixing, and the torque wrench positioning structure fixes the torque wrench, and at the same time, it is linked with the locking anti-falling structure through the arc gear ring, the locking gear, and the rack. When the rivet nut is deflected when being pulled for torque testing, the triangular locking frame is pushed in the reverse direction to be re-locked, and the position deviation caused by the excessive torsional force is corrected, so that the workpiece will not continue to loosen and affect the result of the nut torque test. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the overall side structure of the present invention; Figure 2It is a schematic diagram of the overall top view structure of the present invention; Figure 3 It is a bottom structural schematic diagram of the self-clinching nut workpiece mounting platform of the present invention when viewed from above; Figure 4 It is a schematic diagram of the structure above the self-clinching nut workpiece mounting platform of the present invention; Figure 5 It is a schematic diagram of the overall structure of the self-clinching nut workpiece mounting platform of the present invention; Figure 6 It is a schematic diagram of the overall structure of the workpiece positioning structure and the locking and anti-falling structure of the present invention; Figure 7 It is a schematic diagram of the structure of the workpiece positioning clamp block of the present invention in a clamped state and an unclamped state; Figure 8 This is a schematic diagram of the internal structure of the top of the workpiece positioning clamp block of the present invention; Fig. 9 It is a schematic diagram of the overall structure of the torque wrench positioning structure of the present invention; Fig.10 It is a bottom view structural schematic diagram of the torque wrench positioning structure of the present invention; Fig.11 It is a schematic diagram of the cross-sectional structure of the wrench fixing seat of the present invention when the wrench is not installed; Fig.12 It is a schematic diagram of the cross-sectional structure of the wrench fixing seat of the present invention after the wrench is installed.

[0017] In the figure: 1. Compression rivet nut test positioning installation plate; 2. Compression rivet nut workpiece mounting table; 3. Workpiece positioning structure; 31. Moving connecting plate; 32. Workpiece positioning clamp; 321. Right-angle anti-skid pad; 322. Locking protrusion; 323. Sliding connecting plate; 324. Elastic pad; 33. Driving component one; 4. Locking and anti-falling structure; 41. Triangular locking frame; 42. Locking groove; 43. Rack; 44. Driving component two; 45. Arc gear ring; 451. Rotating shaft; 452. Rotating plate; 46. Locking gear; 5. Torque wrench positioning structure; 51. Offset sliding rail; 511. Reset elastic support plate; 52. Moving base; 53. Wrench fixing seat; 531. Mounting base; 532. Locking clamp; 5321. Extrusion anti-skid pad; 533. Insert rod; 534. Reset spring support rod. DETAILED DESCRIPTION

[0018] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit 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.

[0019] For example, see Figure 1 - Fig.12The present invention provides a technical solution: a positioning structure for torque testing of a rivet nut, comprising a rivet nut test positioning mounting plate 1, a rivet nut workpiece mounting platform 2 is fixedly installed in the middle of the rivet nut test positioning mounting plate 1, a workpiece positioning structure 3 and a locking anti-falling structure 4 are arranged above the rivet nut workpiece mounting platform 2, a torque wrench positioning structure 5 is arranged on one side of the rivet nut workpiece mounting platform 2, the workpiece positioning structure 3 comprises a movable connecting plate 31 and a workpiece positioning clamping block 32, the locking anti-falling structure 4 comprises a triangular locking frame 41, the torque wrench positioning structure 5 comprises a wrench fixing seat 53, the movable connecting plate 31 is symmetrically slidably installed on the upper surface of the rivet nut workpiece mounting platform 2, One side of the mother workpiece mounting platform 2 is provided with a driving component 33 for driving the movable connecting plate 31 to move, and the other side of the rivet nut workpiece mounting platform 2 is provided with a limiting rod adapted to the movable connecting plate 31, and the workpiece positioning clamp 32 is symmetrically fixedly installed in the middle of the movable connecting plate 31, and the inner surface of the workpiece positioning clamp 32 is provided with a right-angle anti-skid pad 321, and the outer surface of the workpiece positioning clamp 32 is provided with a locking protrusion 322, and a sliding connecting plate 323 is fixedly installed between the right-angle anti-skid pad 321 and the locking protrusion 322, and a sliding connecting plate 323 is fixedly installed, and a sliding groove adapted to the sliding connecting plate 323 is opened on the upper inner wall of the workpiece positioning clamp 32, and an elastic pad 324 is provided inside the sliding groove; in this embodiment, it is necessary to It is written that one side of the elastic pad 324 is fixedly connected to the sliding connecting plate 323 above one side of the right-angle anti-slip pad 321, and the driving component 33 includes a driving motor 1 fixedly installed on the outer surface of the rivet nut test positioning mounting plate 1, and the driving component 33 also includes a double-headed threaded rod 1 rotatably installed above the inner surface of the rivet nut test positioning mounting plate 1. One side of the two sets of movable connecting plates 31 are respectively threadedly connected to the threaded surfaces on both sides of the double-headed threaded rod 1. The specific positioning method of the rivet nut is to fix the rivet nut test positioning mounting plate 1 on the torque test platform of the rivet nut by bolts on all sides, and then place the workpiece with the rivet nut to be tested on the rivet nut test positioning mounting plate 1. The middle of the positioning mounting plate 1 is positioned to ensure that the lower half of the rivet nut is placed in the circular through hole in the middle of the rivet nut test positioning mounting plate 1. Then, the driving component 33 works, and with the cooperation of the limit rod, the two sets of movable connecting plates 31 and the workpiece positioning clamp 32 move relative to each other, so that the workpiece positioning clamp 32 clamps the four corners of the workpiece to complete the positioning of the workpiece. At this time, the right-angle anti-slip pad 321 is resisted by the surrounding of the workpiece and moves inward, so that the locking protrusion 322 is ejected with the cooperation of the sliding connecting plate 323, so that the triangular locking frame 41 can lock the workpiece positioning clamp 32 from both sides, so that the workpiece is not locked to avoid loosening when the rivet nut is subjected to a torsion test torque, thereby ensuring the accuracy of the test results.

[0020] Embodiment 2, on the basis of embodiment 1, the triangular locking frame 41 is symmetrically arranged on both sides of the movable connecting plate 31, the upper surface of the rivet nut workpiece mounting platform 2 is provided with a slide groove adapted to the triangular locking frame 41, the side wall of the triangular locking frame 41 is provided with a locking groove 42 adapted to the locking protrusion 322, a rack 43 is fixedly installed at the lower side of one side of the triangular locking frame 41, and a driving component 2 44 for driving the triangular locking frame 41 to move is provided at the lower side of the other side of the triangular locking frame 41, the racks 43 are symmetrically arranged, and the racks 43 are provided at the lower side of the triangular locking frame 41. A locking gear 46 is arranged between them, and the locking gear 46 is rotatably mounted on the lower surface of one side of the rivet nut workpiece mounting platform 2. The upper surface of the outer side of the locking gear 46 meshes with the side surface of the rack 43. An arc-shaped gear ring 45 is arranged on the outer side of the locking gear 46. A rotating shaft 451 is fixedly mounted on the upper side of one side of the arc-shaped gear ring 45. The rotating shaft 451 is rotatably mounted on one side of the rivet nut workpiece mounting platform 2, and a rotating disk 452 is fixedly mounted on the top of the rotating shaft 451. In this embodiment, it should be noted that the driving component 2 The second drive component 44 includes a driving motor 2 fixedly mounted on the outer side of the rivet nut test positioning mounting plate 1, and the driving component 24 also includes a double-headed threaded rod 2 rotatably mounted below the inner surface of the rivet nut test positioning mounting plate 1. The inner walls of one side of the two sets of triangular locking frames 41 are respectively threadedly connected to the threaded surfaces on both sides of the driving component 244. The locking process of the triangular locking frame 41 on the workpiece is as follows: after the workpiece positioning and installation is completed, the driving component 244 drives the triangular locking frame 41 to move relatively from the two sides of the movable connecting plate 31, so that the triangular locking frame 41 engages with the workpiece positioning clamp 32, and the elastic pad 324 is first compressed and contracted until the locking protrusion 322 is inserted into the inner side of the locking groove 42. At this time, the elastic pad 324 pushes the locking protrusion 322 out so that it is stuck with the inner side of the locking groove 42. In this way, the triangular locking frame 41 forms a triangular stable structure from the outer side of the workpiece positioning clamp 32, which locks each other. When the rivet nut is twisted, the workpiece is locked to avoid loosening and affecting the test results. The locking structure is simple, easy to install and cancel the lock later, and easy to operate.

[0021] Embodiment 3, on the basis of embodiment 2, the torque wrench positioning structure 5 also includes an offset sliding rail 51 fixedly installed on one side of the upper surface of the rivet nut workpiece mounting platform 2, the bottom of the wrench fixing seat 53 is provided with a sliding cavity adapted to the size of the insertion rod 533, a reset elastic support plate 511 is fixedly installed on one side of the inner side of the offset sliding rail 51, a movable base 52 is slidably installed on the inner side of the offset sliding rail 51, one side surface of the movable base 52 is fixedly connected to one end of the reset elastic support plate 511, a wrench fixing seat 53 is fixedly installed in the middle of the movable base 52, a mounting base 531 is slidably installed in the middle of the wrench fixing seat 53, and reset springs are symmetrically fixedly installed on both sides of the lower surface of the mounting base 531 The spring support rod 534, the lower end of the reset spring support rod 534 is fixedly connected to the inner wall of the wrench fixing seat 53, the middle part of the lower surface of the mounting base 531 is symmetrically fixedly installed with the insertion rod 533, the upper surface of the rotating disk 452 is evenly distributed with the insertion holes adapted to the insertion rod 533, the two sides of the mounting base 531 are hingedly installed with locking clamps 532, the two sides of the wrench fixing seat 53 are provided with movable grooves adapted to the locking clamps 532, and the upper inner side wall of the locking clamps 532 is fixedly installed with an extrusion anti-skid pad 5321; in this embodiment, the wrench fixing seat 53 fixes the torque wrench in such a way that after the workpiece is positioned and locked, the torque wrench is placed above the rivet nut, and the handle part of the torque wrench is The mounting base 531 is then pressed to compress the return spring support rod 534, and the insertion rod 533 is inserted into the top of the rotating disk 452. At this time, the locking clamp 532 is driven to pull down and buckle inward to buckle and fix the handle part of the torque wrench. In this way, the torque wrench will remain level with the workpiece when rotating, thereby avoiding the diffusion of the torque force and improving the accuracy of the test results. Secondly, once the torque wrench rotates clockwise during the test to loosen the rivet nut, because the insertion rod 533 is inserted into the inside of the rotating disk 452, the wrench fixing seat 53 is driven by the torque wrench to cause the movable base 52 to deflect inside the offset sliding rail 51, and the rotating disk 452 and the rotating shaft 451 are also driven along the rivet nut. The slide groove under the nut workpiece mounting platform 2 is deflected, and at this time the arc-shaped gear ring 45 will drive the locking gear 46 to rotate, and the locking gear 46 drives the rack 43 to move relative to each other to make the triangular locking frame 41 close and tighten. When the torsional force is too large, the workpiece is locked again to prevent the workpiece from loosening. Thirdly, when the torque wrench is not installed, the reset elastic support plate 511 pushes the movable base 52 and the wrench fixing seat 53 to keep them in the initial position, and the reset spring support rod 534 lifts the mounting seat 531. At this time, the insertion rod 533 is not inserted into the interior of the rotating disk 452. At this time, the rotating disk 452 and the rotating shaft 451 can rotate in situ, and the rack 43 will not be stuck when the triangular locking frame 41 moves.

[0022] Embodiment 4, on the basis of embodiment 3, this embodiment further proposes a method for using a positioning structure for torque testing of rivet nuts, comprising the following steps: step 1, fixing the rivet nut test positioning mounting plate 1 on the torque testing platform of the rivet nut by bolts on all sides, and then placing the workpiece with the rivet nut to be tested installed in the middle of the rivet nut test positioning mounting plate 1, ensuring that the lower half of the rivet nut is placed in the circular through hole in the middle of the rivet nut test positioning mounting plate 1, and driving component 1 33 to work in cooperation with the limit rod to make the two sets of movable connecting plates 31 and the workpiece positioning clamp 32 move relative to each other, so that the workpiece positioning clamp 32 clamps and fixes the four corners of the workpiece, completing Positioning of the workpiece; Step 2, after the workpiece is positioned and installed, the driving component 2 44 works to drive the triangular locking frame 41 to move relative to each other from both sides of the movable connecting plate 31, so that the triangular locking frame 41 engages with the workpiece positioning clamp 32, and the elastic pad 324 pushes out the locking protrusion 322 so that it is locked with the inner side of the locking groove 42 to complete the locking; Step 3, after the workpiece is positioned and locked, place the torque wrench above the rivet nut, the handle part of the torque wrench will be stuck in the mounting bracket 531, the mounting bracket 531 is pressed to compress the reset spring support rod 534, and the insert rod 533 will be stuck in the top of the rotating disk 452, and the wrench can be rotated clockwise to perform the torque test.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning structure for a torque test of a self-clinching nut, comprising a self-clinching nut test positioning mounting plate (1), characterized in that: A rivet nut workpiece mounting platform (2) is fixedly mounted in the middle of the rivet nut test positioning mounting plate (1); a workpiece positioning structure (3) and a locking and anti-falling structure (4) are arranged above the rivet nut workpiece mounting platform (2); a torque wrench positioning structure (5) is arranged on one side of the rivet nut workpiece mounting platform (2); the workpiece positioning structure (3) comprises a movable connecting plate (31) and a workpiece positioning clamping block (32); the locking and anti-falling structure (4) comprises a triangular locking frame (41); and the torque wrench positioning structure (5) comprises a wrench fixing seat (53).

2. A positioning structure for torque testing of a self-clinching nut according to claim 1, characterized in that: The movable connecting plate (31) is symmetrically slidably mounted on the upper surface of the rivet nut workpiece mounting platform (2); a driving component (33) for driving the movable connecting plate (31) to move is disposed on one side of the rivet nut workpiece mounting platform (2); and a limiting rod adapted to the movable connecting plate (31) is disposed on the other side of the rivet nut workpiece mounting platform (2).

3. A positioning structure for torque testing of a self-clinching nut according to claim 1, characterized in that: The workpiece positioning clamp (32) is symmetrically fixedly mounted in the middle of the movable connecting plate (31); the inner surface of the workpiece positioning clamp (32) is provided with a right-angle anti-slip pad (321); and the outer surface of the workpiece positioning clamp (32) is provided with a locking protrusion (322).

4. A positioning structure for torque testing of a self-clinching nut according to claim 3, characterized in that: A sliding connection plate (323) is fixedly installed between the right-angle anti-slip pad (321) and the locking protrusion (322), and a sliding groove matching the sliding connection plate (323) is provided on the upper inner wall of the workpiece positioning clamp (32), and an elastic pad (324) is arranged inside the sliding groove.

5. The positioning structure for torque testing of a self-clinching nut according to claim 1, characterized in that: The triangular locking frame (41) is symmetrically arranged on both sides of the movable connecting plate (31), the upper surface of the rivet nut workpiece mounting platform (2) is provided with a slide groove matched with the triangular locking frame (41), and the side wall of the triangular locking frame (41) is provided with a locking groove (42) matched with the locking protrusion (322).

6. A positioning structure for torque testing of a self-clinching nut according to claim 1, characterized in that: A rack (43) is fixedly mounted below one side of the triangular locking frame (41), and a second driving component (44) for driving the triangular locking frame (41) to move is arranged below the other side of the triangular locking frame (41). The racks (43) are symmetrically arranged, and a locking gear (46) is arranged between the racks (43). The locking gear (46) is rotatably mounted on a lower surface of one side of the rivet nut workpiece mounting platform (2), and the upper side of the outer surface of the locking gear (46) is meshed with the side surface of the rack (43).

7. A positioning structure for torque testing of a self-clinching nut according to claim 6, characterized in that: An arc-shaped gear ring (45) is arranged outside the locking gear (46), a rotating shaft (451) is fixedly mounted above one side of the arc-shaped gear ring (45), the rotating shaft (451) is rotatably mounted on one side of the rivet nut workpiece mounting platform (2), and a rotating disk (452) is fixedly mounted on the top of the rotating shaft (451).

8. A positioning structure for torque testing of a self-clinching nut according to claim 7, characterized in that: The torque wrench positioning structure (5) further comprises an offset sliding rail (51) fixedly mounted on one side of the upper surface of the rivet nut workpiece mounting platform (2); a sliding cavity having a size matching that of the insertion rod (533) is provided at the bottom of the wrench fixing seat (53); a resetting elastic support plate (511) is fixedly mounted on one side of the interior of the offset sliding rail (51); a movable base (52) is slidably mounted on the interior of the offset sliding rail (51); and a side surface of the movable base (52) is fixedly connected to one end of the resetting elastic support plate (511).

9. A positioning structure for torque testing of a self-clinching nut according to claim 8, characterized in that: A wrench fixing seat (53) is fixedly installed in the middle of the movable base (52), a mounting base (531) is slidably installed in the middle of the wrench fixing seat (53), return spring support rods (534) are symmetrically fixedly installed on both sides of the lower surface of the mounting base (531), the lower end of the return spring support rod (534) is fixedly connected to the inner wall of the wrench fixing seat (53), and an insertion rod (533) is symmetrically fixedly installed in the middle of the lower surface of the mounting base (531), and the upper surface of the rotating disk (452) is evenly distributed with insertion holes that are compatible with the insertion rods (533).

10. A positioning structure for torque testing of a self-clinching nut according to claim 9, characterized in that: Locking clamps (532) are hingedly mounted on both sides of the mounting base (531), movable grooves matching the locking clamps (532) are arranged on both sides of the wrench fixing base (53), and an extrusion anti-slip pad (5321) is fixedly mounted on the upper inner side wall of the locking clamp (532).

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