An automatic tensile strength testing machine for random inspection of wire quality.

Abstract

This invention relates to the technical field of tensile strength testing, and discloses an automatic tensile strength testing machine for random inspection of wire quality. The machine includes an upper clamping unit comprising an upper housing and a lower housing below it. Multiple sliding rods are provided on the upper end face of the lower housing. Sliding holes matching the sliding rods are provided on the lower end face of the upper housing. A drive motor is housed within the upper housing, and a rotating shaft is connected to the main shaft of the drive motor. A cylindrical cavity is formed on the upper end face of the lower housing, and the rotating shaft extends into the cylindrical cavity. An inclined disk is provided on the shaft wall of the rotating shaft, and an annular groove is formed on the side edge of the disk. A sliding ball head is provided on the inner wall of the cylindrical cavity, and the sliding ball head slides within the annular groove. By setting up the upper clamping unit, periodic vibration is applied simultaneously with the tension of the wire during the tensile test, achieving dynamic load superposition and simulating real-world scenarios such as wind vibration and mechanical vibration.

Description

Technical Field

[0001] This invention relates to the technical field of tensile strength testing, and more particularly to an automatic tensile strength testing machine for random inspection of wire quality. Background Technology

[0002] An automatic tensile strength testing machine is an automated device used to determine the maximum load-bearing capacity of materials or components under tension. Through high-precision sensors, a servo drive system, and an intelligent control system, it automates the entire process from sample clamping and uniform tensile testing to data acquisition and result analysis. The equipment is typically equipped with adaptive fixtures, compatible with testing of various specifications of metals, plastics, cables, and new materials. It records tensile force-displacement curves in real time, accurately calculates parameters such as tensile strength, yield strength, and elongation at break, and provides testing services for new materials.

[0003] Patent CN119688448A discloses an automatic testing device for the tensile strength of electric wires and cables, belonging to the field of tensile strength testing of electric wires and cables. It includes a frame, a control console on one side of the frame, a mounting plate slidably mounted on the frame, a lower cylinder fixedly mounted on the frame, and an upper cylinder fixedly mounted on the bottom of the outer surface of the mounting plate. A clamping head is fixedly connected to the end of a first corrugated pipe away from the expansion groove, and multiple sets of clamping heads are arranged in a ring. This application, by setting clamping components, can automatically clamp the electric wire and cable during insertion into the upper and lower cylinders, with the upper cylinder clamping component fixing the upper end of the electric wire and cable, and the lower cylinder clamping component fixing the lower end of the electric wire and cable. This eliminates the need to manually fix both ends of the electric wire and cable to the clamps of the tensile testing machine, using a direct insertion method, simplifying the action of fixing the electric wire and cable to the clamps on the tensile testing machine.

[0004] The existing technology has the following drawbacks:

[0005] Existing automatic tensile strength testing equipment is generally designed based on the principle of uniaxial tensile testing, with its core function focused on determining mechanical properties under static or quasi-static loads. These devices typically use servo motors to drive ball screws to achieve uniform tension, combined with high-precision force and displacement sensors to collect data, accurately calculating fundamental parameters such as tensile strength, yield point, and elongation at break. However, with the increasing complexity of industrial applications, materials often experience simultaneous multi-physical field coupled loads such as tension, vibration, and impact during actual service. The limitations of traditional equipment are becoming increasingly apparent: firstly, existing technologies can only achieve tensile loading in a single direction and cannot integrate dynamic loads such as periodic vibration and random impact through mechanical structures or control algorithms. This results in significant deviations between test conditions and real-world operating conditions, hindering the reliability assessment and iteration efficiency of high-end cable products. Summary of the Invention

[0006] In view of the above-mentioned problems in the existing technology, an automatic tensile strength testing machine for random inspection of wire quality is proposed.

[0007] This application provides an automatic tensile strength testing machine for spot checks of wire quality. Its purpose is to subject the test object to multi-physical field coupled loads such as tension, vibration, and impact in the tensile test, so as to realize dynamic load superposition and simulate complex real working conditions.

[0008] The technical solution of the present invention is as follows: an automatic tensile strength testing machine for random inspection of wire quality, including a base, a slide rail vertically arranged on the base, a force gauge slidably arranged in the slide rail, a connecting rod arranged at the lower end of the force gauge, an upper clamping unit arranged at the lower end of the connecting rod, and a lower clamping unit arranged on the base.

[0009] The upper clamping unit and the lower clamping unit clamp the wire body;

[0010] The upper clamping unit includes an upper housing and a lower housing below the upper housing. The upper end face of the lower housing is provided with multiple sliding pillars, and the lower end face of the upper housing is provided with sliding holes that match the sliding pillars. A drive motor is provided inside the upper housing, and a rotating shaft is connected to the main shaft of the drive motor. A cylindrical cavity is opened on the upper end face of the lower housing, and the rotating shaft extends into the cylindrical cavity. An inclined disk is provided on the shaft wall of the rotating shaft, and an annular groove is opened on the side edge of the disk. A sliding ball head is provided on the inner wall of the cylindrical cavity, and the sliding ball head slides in the annular groove.

[0011] Using the above scheme, by setting up an upper clamping unit, in the tensile test, the upper clamping unit moves upward as the force gauge moves upward, applying tension to the wire body. At the same time, it drives the motor spindle to rotate, causing the rotating shaft to rotate. The disc on the rotating shaft rotates in an inclined state, causing the sliding ball head in the annular groove to vibrate up and down, thereby causing the lower shell to vibrate up and down. While stretching the wire, periodic vibration is applied to achieve dynamic load superposition and simulate actual scenarios such as wind vibration and mechanical vibration.

[0012] Furthermore, a pair of flat grooves are provided on the shaft wall of the rotating shaft, and a square hole is provided at the center of the disk. The square hole is fitted onto the pair of flat grooves, and a pin is passed through the center of the flat groove and connected to the hole wall of the square hole.

[0013] By using the above scheme, a square hole is fitted onto a pair of flat grooves, allowing the first disk to tilt relative to the rotation axis, thereby changing the tilt amplitude of the first disk and thus changing the amplitude of the periodic vibration.

[0014] Furthermore, a limiting strip is provided on the wall of the rotating shaft above the first disk, and a second disk is slidably arranged on the rotating shaft along the length of the limiting strip. An annular groove is provided on the side edge of the second disk. A sliding rod is vertically arranged inside the upper housing, and a flat tooth is provided on the sliding rod. A sliding ball head is provided at the lower end of the sliding rod, and the sliding ball head slides in the annular groove. The lower end face of the second disk and the upper end face of the first disk are connected by a connecting rod. A rotating rod is arranged inside the upper housing in a direction perpendicular to the sliding rod, and an annular tooth is provided on the rod wall of the rotating rod. The annular tooth meshes with the flat tooth.

[0015] Using the above scheme, by rotating the rotating rod, the rotating rod drives the sliding rod to slide vertically, and the sliding ball head on the sliding rod drives the second disk to slide on the rotating axis. The second disk pulls the first disk to rotate around the pin through the connecting rod, thereby changing the tilt amplitude of the first disk. This is used to superimpose different periodic vibration amplitudes when stretching the wire body to simulate actual scenarios such as wind vibration and mechanical vibration of different intensities.

[0016] Furthermore, a connecting block is provided on the lower end face of the lower housing, and a sliding groove is provided inside the connecting block. A pair of symmetrical clamping claws are slidably arranged in the sliding groove, and each clamping claw is provided with a clamping block.

[0017] Using the above scheme, a pair of sliding gripping claws are used to clamp the wire body.

[0018] Furthermore, a fastening bolt is provided through the pair of clamping claws, and a nut is provided on the threaded end of the fastening bolt, with a tightening wrench hinged to the nut.

[0019] Using the above method, the end of the wire body is clamped by pre-tightening the fastening bolt and then turning the clamping wrench.

[0020] Furthermore, the lower end face of the second disk is provided with a hinge lug 1, and the upper end face of the first disk is provided with a hinge lug 2. Both the hinge lug 1 and the hinge lug 2 are hinged to the connecting rod.

[0021] Using the above scheme, disk one and disk two are connected by hinge lug one and connecting rod, so that when disk two moves upward, the tilt angle of disk one is changed.

[0022] Furthermore, the walls of both annular groove one and annular groove two are arc-shaped, and the groove width gradually increases towards the groove opening.

[0023] By adopting the above scheme and through the above settings, the friction between the first annular groove and the first sliding ball head is reduced, as is the friction between the second annular groove and the second sliding ball head.

[0024] Furthermore, arc-shaped protrusions are evenly spaced on the upper and lower sides of the annular groove.

[0025] By adopting the above scheme, by setting an arc-shaped protrusion, the sliding ball head will generate a small vibration when sliding in the annular groove, thus realizing a multi-mode coupled test of tension + periodic vibration + random impact.

[0026] Furthermore, the thickness of the arc-shaped protrusion gradually increases towards the groove opening.

[0027] By adopting the above scheme and through the above settings, when the tilt angle of the first disk increases, the first sliding ball head contacts the thicker part of the arc-shaped protrusion, thereby achieving the superposition of a larger periodic vibration and a larger impact amplitude.

[0028] The beneficial effects of this invention are:

[0029] By setting up an upper clamping unit, in the tensile test, the upper clamping unit moves upward as the force gauge moves upward, applying tension to the wire body. At the same time, it drives the motor spindle to rotate, which in turn drives the rotating shaft to rotate. The disc on the rotating shaft rotates in an inclined state, causing the sliding ball head in the annular groove to vibrate up and down, thereby causing the lower shell to vibrate up and down. While stretching the wire, periodic vibration is applied to achieve dynamic load superposition and simulate actual scenarios such as wind vibration and mechanical vibration.

[0030] By rotating the rotating rod, the rotating rod drives the sliding rod to slide vertically. The sliding ball head on the sliding rod drives the second disk to slide on the rotating shaft. The second disk pulls the first disk to rotate around the pin through the connecting rod, thereby changing the tilt amplitude of the first disk. This is used to superimpose different periodic vibration amplitudes when stretching the wire body to simulate actual scenarios such as wind vibration and mechanical vibration of different intensities. Attached Figure Description

[0031] Figure 1 This is a perspective view of an automatic tensile strength testing machine for random inspection of wire quality, based on the present invention.

[0032] Figure 2 This is a perspective view of the upper clamping unit in the automatic tensile strength testing machine for random inspection of wire quality, according to the present invention.

[0033] Figure 3 For the present invention Figure 2 The right view;

[0034] Figure 4 For the present invention Figure 2 Front view;

[0035] Figure 5 For the present invention Figure 3 Sectional view at point AA;

[0036] Figure 6 This is a perspective view of the rotating shaft and its components in an automatic tensile strength testing machine for random inspection of wire quality, according to the present invention.

[0037] Figure 7 For the present invention Figure 6 Top view;

[0038] Figure 8 For the present invention Figure 6 Other perspectives;

[0039] Figure 9 This is a perspective view of the fastening bolts and related components in the automatic tensile strength testing machine for random inspection of wire quality, which is based on the present invention.

[0040] Figure 10 This is a diagram showing the working state changes of the automatic tensile strength testing machine for random inspection of wire quality, which is an application of the present invention.

[0041] In the picture:

[0042] 1. Base; 2. Slide rail; 3. Force gauge; 4. Connecting rod; 5. Upper clamping unit; 6. Lower clamping unit; 7. Wire body; 8. Upper housing; 9. Lower housing; 10. Sliding column; 11. Drive motor; 12. Rotating shaft; 13. Cylindrical cavity; 14. Disc one; 15. Annular groove one; 16. Sliding ball head one; 17. Flat groove; 18. Square hole; 19. Pin; 20. Limiting strip; 21. Disc two; 22. Annular groove two; 23. Sliding rod; 24. Flat tooth; 25. Sliding ball head two; 26. Connecting rod; 27. Rotating rod; 28. Annular tooth; 29. ​​Connecting block; 30. Slide groove; 31. Clamping claw; 32. Clamping block; 33. Fastening bolt; 34. Nut; 35. Tightening wrench; 36. Hinge ear one; 37. Hinge ear two; 38. Arc-shaped protrusion. Detailed Implementation

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] Example 1, referring to Figure 1-10This invention provides a first embodiment of an automatic tensile strength testing machine for random inspection of wire quality, comprising a base 1, a slide rail 2 vertically mounted on the base 1, a force gauge 3 slidably mounted within the slide rail 2, a connecting rod 4 located at the lower end of the force gauge 3, an upper clamping unit 5 located at the lower end of the connecting rod 4, and a lower clamping unit 6 mounted on the base 1; a wire body 7 is clamped between the upper clamping unit 5 and the lower clamping unit 6; the upper clamping unit 5 includes an upper housing 8, and a lower housing 9 is located below the upper housing 8. The upper end face of the upper housing 8 is provided with multiple sliding columns 10, and the lower end face of the upper housing 8 is provided with sliding holes that match the sliding columns 10. The upper housing 8 is provided with a drive motor 11, and a rotating shaft 12 is connected to the main shaft of the drive motor 11. The upper end face of the lower housing 9 is provided with a cylindrical cavity 13, and the rotating shaft 12 extends into the cylindrical cavity 13. An inclined disk 14 is provided on the shaft wall of the rotating shaft 12, and an annular groove 15 is provided on the side edge of the disk 14. A sliding ball head 16 is provided on the inner wall of the cylindrical cavity 13, and the sliding ball head slides in the annular groove 15.

[0046] In this embodiment, a slide motor is installed inside the slide rail 2. The slide motor is connected to the force gauge 3. The slide motor crawls inside the slide rail 2 to apply tension to the wire body 7 and detect the tensile strength of the wire body 7. The force gauge 3 displays the magnitude of the tension on the wire body 7 in real time. A button for controlling the vertical movement of the slide motor is provided on the base 1. The lower clamping unit 6 is used to clamp the lower end of the wire body 7. Its structure can be the same as the upper clamping unit 5, or it can be a gripper with only clamping function. A gap is provided between the upper shell 8 and the lower shell 9 to reserve space for the periodic vibration of the lower shell 9. Multiple sliding columns 10 on the upper end face of the lower shell 9 slide in the sliding holes on the lower end face of the upper shell 8, which plays a role in limiting the vertical movement of the lower shell 9. The width of the annular groove 15 is slightly larger than the diameter of the sliding ball head 16. When the inclined disk 14 rotates periodically with the rotating shaft 12, it will cause the sliding ball head 16 to vibrate sinusoidally in the vertical direction.

[0047] By setting up the upper clamping unit 5, in the tensile test, the upper clamping unit 5 moves upward with the force gauge 3, applying tension to the wire body 7. At the same time, it drives the main shaft of the motor 11 to rotate, which in turn drives the rotating shaft 12 to rotate. The disc 14 on the rotating shaft 12 rotates in an inclined state, which drives the sliding ball head 16 in the annular groove 15 to vibrate up and down, thereby driving the lower shell 9 to vibrate up and down. While stretching the wire, periodic vibration is applied to achieve dynamic load superposition and simulate actual scenarios such as wind vibration and mechanical vibration.

[0048] Reference Figure 6A pair of flat grooves 17 are formed on the shaft wall of the rotating shaft 12, and a square hole 18 is formed at the center of the disk 14. The square hole 18 is fitted onto the pair of flat grooves 17, and a pin 19 passes through the center of the flat grooves 17 and is connected to the wall of the square hole 18. By fitting the square hole 18 onto the pair of flat grooves 17, the disk 14 can be tilted relative to the rotating shaft 12, thereby changing the tilt amplitude of the disk 14 and thus changing the amplitude of the periodic vibration.

[0049] Reference Figures 5-6 A limiting strip 20 is provided on the shaft wall of the rotating shaft 12 located above the first disk 14. A second disk 21 is slidably arranged on the rotating shaft 12 along the length of the limiting strip 20. An annular groove 22 is provided on the side edge of the second disk 21. A sliding rod 23 is vertically arranged inside the upper housing 8. A flat tooth 24 is provided on the sliding rod 23. A sliding ball head 25 is provided at the lower end of the sliding rod 23. The sliding ball head 25 slides in the annular groove 22. The lower end face of the second disk 21 and the upper end face of the first disk 14 are connected by a connecting rod 26. A rotating rod 27 is arranged inside the upper housing 8 in a direction perpendicular to the sliding rod 23. An annular tooth 28 is provided on the rod wall of the rotating rod 27. The annular tooth 28 meshes with the flat tooth 24.

[0050] In this embodiment, one end of the rotating rod 27 extends out of the upper housing 8, and its end is also provided with a slot for inserting a wrench. By rotating the wrench, the rotating rod 27 is rotated, and the rod wall of the rotating rod 27 is subjected to high friction treatment with the upper housing 8. The disc 21 is provided with a limiting groove that matches the limiting strip 20, so that the disc 21 can slide vertically and rotate synchronously with the rotating shaft 12. The upper housing 8 is provided with a track groove for the sliding rod 23 to slide vertically.

[0051] By rotating the rotating rod 27, the rotating rod 27 drives the sliding rod 23 to slide vertically. The sliding ball head on the sliding rod 23 drives the second disk 21 to slide on the rotating shaft 12. The second disk 21 pulls the first disk 14 to rotate around the pin rod 19 through the connecting rod 26, thereby changing the tilt amplitude of the first disk 14. This is used to superimpose different periodic vibration amplitudes when stretching the wire body 7, simulating actual scenarios such as wind vibration and mechanical vibration of different intensities.

[0052] Reference Figures 2-5 The lower end face of the lower housing 9 is provided with a connecting block 29, and a sliding groove 30 is provided inside the connecting block 29. A pair of symmetrical clamping claws 31 are slidably arranged in the sliding groove 30, and each clamping claw 31 is provided with a clamping block 32. By setting a pair of sliding clamping claws 31, the wire body 7 is clamped.

[0053] Reference Figure 5A pair of clamping claws 31 are fitted with a fastening bolt 33, and a nut 34 is provided at the threaded end of the fastening bolt 33. A clamping wrench 35 is hinged to the nut 34. The clamping wrench 35 includes a handle and a pressure wheel. The pressure wheel and the nut 34 are eccentrically hinged so that the pair of clamping claws 31 are tightened when the pressure wheel rotates. By pre-tightening the fastening bolt 33 and then turning the clamping wrench 35, the end of the wire body 7 is clamped.

[0054] Reference Figure 8 The lower end face of disk 21 is provided with hinge lug 36, and the upper end face of disk 14 is provided with hinge lug 37. Both hinge lug 36 and hinge lug 37 are hinged to connecting rod 26. Disk 14 and disk 21 are connected by hinge lug 36, hinge lug, and connecting rod 26. When disk 21 moves upward, the tilt angle of disk 14 is changed.

[0055] Reference Figure 5 The walls of both annular groove 15 and annular groove 22 are arc-shaped, and the groove width gradually increases towards the groove opening. This design reduces the friction between annular groove 15 and sliding ball head 16, as well as the friction between annular groove 22 and sliding ball head 25.

[0056] Reference Figure 6 Arc-shaped protrusions 38 are evenly spaced on the upper and lower walls of the annular groove 15. By setting the arc-shaped protrusions 38, the sliding ball head 16 will generate small vibrations when sliding in the annular groove 15, realizing a multi-mode coupled test of tension + periodic vibration + random impact.

[0057] Reference Figure 6 The thickness of the arc-shaped protrusion 38 gradually increases towards the groove. With the above arrangement, when the tilt angle of the disk 14 increases, the sliding ball head 16 contacts the thicker part of the arc-shaped protrusion 38, achieving the superposition of larger periodic vibration and larger impact amplitude.

[0058] Working principle of the invention:

[0059] During the tensile test, the upper clamping unit 5 moves upward steadily at a stable rate through a high-precision sliding table motor linked with the force gauge 3, applying an axial tensile load to the wire body 7. Simultaneously, the drive motor 11 drives the rotating shaft 12 to rotate. The dual-stage adjustable tilt disc assembly installed on the rotating shaft 12 achieves dynamic vibration amplitude control through an innovative mechanical linkage structure: Disc 14 adopts a swashplate design with an adjustable tilt angle of 15°~75°. Its annular groove 15 is embedded with an ultra-hard silicon nitride ceramic sliding ball head 16, which converts rotation into axial vibration through centrifugal motion, driving the lower housing 9 to generate high-frequency vibration; Disc 21 is controlled by a gear and rack mechanism through a sliding rod 23 and a rotating rod 27, pushing the sliding rod 23 to slide vertically. The sliding ball head 25 at its end is embedded in the radial annular groove 22 of Disc 21, causing Disc 21 to move axially along the rotating shaft 12. Then, through the four-bar linkage 26 mechanism, the tilt angle of Disc 14 around the pin 19 is dynamically changed, realizing stepless adjustment of vibration amplitude. When the sliding ball head 16 slides within the annular groove 15, it is obstructed by the arc-shaped protrusion 38, resulting in minor vibrations. This structure breaks through the limitations of traditional fixed amplitude, allowing for real-time dynamic adjustment of vibration intensity during testing. It precisely matches mechanical vibration levels 1 to 12, simultaneously superimposing random impact and steady-state tensile loads to construct a three-modal coupled loading environment of tension, periodic vibration, and random impact. This provides a high-fidelity composite mechanical testing platform for scenarios such as eddy-induced vibration suppression in deep-sea cables and wind-induced vibration fatigue analysis of high-speed rail contact networks.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic tensile strength testing machine for random inspection of wire quality, comprising a base (1), characterized in that: It also includes a slide rail (2) vertically mounted on the base (1), a force gauge (3) slidably mounted in the slide rail (2), a connecting rod (4) mounted at the lower end of the force gauge (3), an upper clamping unit (5) mounted at the lower end of the connecting rod (4), and a lower clamping unit (6) mounted on the base (1). The upper clamping unit (5) and the lower clamping unit (6) clamp the wire body (7). The upper clamping unit (5) includes an upper housing (8), a lower housing (9) is provided below the upper housing (8), a plurality of sliding columns (10) are provided on the upper end face of the lower housing (9), a sliding hole matching the sliding column (10) is provided on the lower end face of the upper housing (8), a drive motor (11) is provided inside the upper housing (8), a rotating shaft (12) is connected to the main shaft of the drive motor (11), a cylindrical cavity (13) is opened on the upper end face of the lower housing (9), the rotating shaft (12) extends into the cylindrical cavity (13), an inclined disk (14) is provided on the shaft wall of the rotating shaft (12), an annular groove (15) is opened on the side edge of the disk (14), a sliding ball head (16) is provided on the inner wall of the cylindrical cavity (13), and the sliding ball head slides in the annular groove (15).

2. The automatic tensile strength testing machine for random inspection of wire quality according to claim 1, characterized in that: The rotating shaft (12) has a pair of flat grooves (17) on its shaft wall, and a square hole (18) is provided at the center of the disk (14). The square hole (18) is fitted onto the pair of flat grooves (17), and a pin (19) is passed through the center of the flat groove (17) and the pin (19) is connected to the hole wall of the square hole (18).

3. The automatic tensile strength testing machine for random inspection of wire quality according to claim 2, characterized in that: A limiting strip (20) is provided on the shaft wall of the rotating shaft (12) located above the first disk (14). A second disk (21) is slidably provided on the rotating shaft (12) located on the length of the limiting strip (20). An annular groove (22) is provided on the side edge of the second disk (21). A sliding rod (23) is vertically provided inside the upper housing (8). A flat tooth (24) is provided on the sliding rod (23). A sliding ball head (25) is provided at the lower end of the sliding rod (23). The sliding ball head (25) slides in the annular groove (22). The lower end face of the second disk (21) and the upper end face of the first disk (14) are connected by a connecting rod (26). A rotating rod (27) is provided inside the upper housing (8) in a direction perpendicular to the sliding rod (23). An annular tooth (28) is provided on the rod wall of the rotating rod (27). The annular tooth (28) meshes with the flat tooth (24).

4. The automatic tensile strength testing machine for random inspection of wire quality according to claim 1, characterized in that: The lower end face of the lower housing (9) is provided with a connecting block (29), and a sliding groove (30) is provided in the connecting block (29). A pair of symmetrical clamping claws (31) are slidably arranged in the sliding groove (30), and a clamping block (32) is provided on each clamping claw (31).

5. The automatic tensile strength testing machine for random inspection of wire quality according to claim 4, characterized in that: A fastening bolt (33) is provided through the pair of clamping claws (31), and a nut (34) is provided on the threaded end of the fastening bolt (33). A tightening wrench (35) is hinged on the nut (34).

6. The automatic tensile strength testing machine for random inspection of wire quality according to claim 3, characterized in that: The lower end face of the second disk (21) is provided with a hinge ear (36), and the upper end face of the first disk (14) is provided with a hinge ear (37). Both the hinge ear (36) and the hinge ear (37) are hinged to the connecting rod (26).

7. The automatic tensile strength testing machine for random inspection of wire quality according to claim 3, characterized in that: The walls of both annular groove one (15) and annular groove two (22) are arc-shaped, and the groove width gradually increases towards the groove opening.

8. The automatic tensile strength testing machine for random inspection of wire quality according to claim 7, characterized in that: Arc-shaped protrusions (38) are evenly spaced on the upper and lower sides of the annular groove (15).

9. The automatic tensile strength testing machine for random inspection of wire quality according to claim 8, characterized in that: The thickness of the arc-shaped protrusion (38) gradually increases towards the groove.

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