A tensile testing device for cable processing

Abstract

The invention relates to the technical field of cable testing and discloses a tensile testing device for cable processing, comprising a frame, a movable frame being slidably connected to the outside of the frame; a lifting mechanism, the lifting mechanism being installed on the frame to drive the movable frame to move on the frame; a fixed pulley group, the fixed pulley group being installed on the top of the frame, the fixed pulley group comprising a plurality of symmetrically arranged fixed pulleys; two symmetrically arranged testing mechanisms, and the testing mechanisms being installed inside the movable frame, the testing mechanisms comprising a tensile component and two symmetrically arranged clamping components, and the clamping components being symmetrically arranged at both ends of the tensile component; the testing mechanism further comprising a driving component, and the driving component driving the tensile component to stretch the cable. The present invention can flexibly randomly select tensile test objects for the cable, and comprehensively reflect the quality differences at different positions of the entire cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable testing, and in particular to a tensile testing device for cable processing. Background Art

[0002] In numerous fields, including power transmission, communications networks, and industrial automation, cables are key components for power and signal transmission. Their quality and performance are directly related to the stable operation, safety, and reliability of the systems. A cable's tensile strength is a key quality indicator, reflecting its ability to resist damage when subjected to tensile forces. Therefore, accurate and efficient cable tensile testing is crucial.

[0003] Currently, traditional cable tension testing methods have many shortcomings. Most current cables are tension tested using a winding method, which results in low test efficiency. Furthermore, due to the tightness of the winding, there is a certain amount of reserved length, which affects the accuracy of the test tension. Furthermore, due to the tightness of the winding, there is a certain amount of reserved length, which affects the accuracy of the test tension. When tension testing is performed on a wound cable, eccentricity is prone to occur, making it difficult to ensure the coaxiality of the cable and the clamping components, resulting in uneven force on each part. This not only affects the actual stress state of the cable during the test, making the test results unable to accurately reflect the tensile performance of the cable, but can also cause damage to the cable before reaching its true tensile limit due to local stress concentration.

[0004] Although the cable tensile testing device for cable processing disclosed in Chinese patent application number CN202320952939.2 has solved the above-mentioned shortcomings to a certain extent, there are still some problems that need to be improved. The device cannot flexibly randomly select tensile test objects for cables, and can only carry out tests on specific fixed parts of the cable. It is difficult to fully reflect the quality differences at different positions of the entire cable, resulting in the test results lacking sufficient representativeness.

[0005] Therefore, it is necessary to provide a tensile testing device for cable processing to solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to provide a tensile testing device for cable processing to solve the existing problems in the above-mentioned background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a tensile testing device for cable processing, comprising a frame and further comprising:

[0008] A movable frame, the movable frame being sleeved on the frame and slidably connected to the frame;

[0009] A lifting mechanism, the lifting mechanism being installed on the frame to drive the movable frame to move on the frame;

[0010] A fixed pulley assembly is installed on the top of the frame, and the fixed pulley assembly includes a plurality of symmetrically arranged fixed pulleys;

[0011] Two symmetrically arranged testing mechanisms, each of which is installed inside the moving frame, each of which includes a stretching assembly and two symmetrically arranged clamping assemblies, wherein the clamping assemblies are symmetrically arranged at both ends of the stretching assembly;

[0012] The testing mechanism further includes a driving component, and the driving component drives the stretching component to stretch the cable.

[0013] As a further solution of the present invention, a lifting mechanism is installed on the frame, and the lifting mechanism includes a vertically installed ball screw, a lifting motor is installed at one end of the ball screw, a supporting seat is installed on the inner side wall of the movable frame, and the supporting seat is connected to the ball screw, a plurality of guide rods are symmetrically arranged on the frame, a plurality of guide frames are symmetrically installed in the movable frame, a plurality of guide wheels are symmetrically installed on the guide frames, and the guide wheels are clamped on the guide rods at corresponding positions.

[0014] As a further solution of the present invention, the stretching assembly includes two symmetrically arranged stretching threaded tubes, one of which is symmetrically provided with a plurality of limit slots, and the other end of the stretching threaded tube is symmetrically provided with a plurality of limit rods, and the limit rods are all clamped in the limit slots with relative positions, the outside of the stretching threaded tubes are threadedly connected to the limit thread sleeves, and a plurality of connecting frames are installed between the two limit thread sleeves.

[0015] As a further solution of the present invention, the inner side walls of the movable frame are symmetrically installed with mounting frames, and the testing mechanisms are all installed on the same group of mounting frames. The clamping components are all installed with limit frames, and the middle part of the limit frames is installed with a displacement sensor. The side walls of the mounting frames are provided with movable holes, and the limit frames are slidably connected in the movable holes. The mounting frames are also provided with mounting holes, and the displacement sensor is located in the mounting holes.

[0016] As a further solution of the present invention, one end of the limiting threaded sleeve is fixedly connected to a synchronous sleeve, and the corresponding tensile threaded tube is located inside the synchronous sleeve;

[0017] The driving assembly includes a stretching motor and a protective box. The output shaft of the stretching motor extends into the protective box and is equipped with a stretching driving wheel. A stretching driven wheel is installed outside the synchronous sleeve, and the stretching driven wheel is meshed with the stretching driving wheel.

[0018] As a further embodiment of the present invention, the clamping assembly includes a clamping sleeve, and the clamping sleeve is fixedly connected to the end of the tensile threaded tube at a corresponding position. A plurality of engaging grooves are symmetrically formed on the inner side wall of the clamping sleeve, and a clamping pliers is slidably connected in each of the engaging grooves. The clamping pliers is located in the clamping sleeve, and a guide screw is horizontally installed in the engaging groove, and the guide screw is threadedly connected to the clamping pliers.

[0019] The clamping sleeve is further provided with an annular cavity and a docking cavity, and the engaging groove is communicated with the annular cavity, and the docking cavity is communicated with the annular cavity. An end face gear ring is installed in the annular cavity, and an engaging gear is installed on the lead screw, and the engaging gears are all meshed with the end face gear ring;

[0020] A mounting shaft is horizontally mounted in the docking cavity, a docking gear is mounted on the mounting shaft, and the docking gear is meshed with the end face gear ring, and one end of the mounting shaft extends outside the clamping sleeve and is mounted with an adjusting wheel.

[0021] As a further solution of the present invention, a plurality of positioning grooves are symmetrically provided on the inner side wall of the engaging groove, and a plurality of positioning bars are symmetrically installed on the outer side wall of the clamping pliers, and the positioning bars are all clamped in the positioning grooves.

[0022] As a further solution of the present invention, a dial indicator is inserted into the clamping sleeve, and the probe of the dial indicator is located inside the clamping sleeve.

[0023] The present invention utilizes a lifting mechanism with a ball screw that cooperates with a support seat, combined with a guide rod and guide wheel, to smoothly raise and lower the movable frame, providing a stable environment for cable stretching and driving the movable frame and measuring mechanism to perform selective local measurement of the cable. The fixed pulley assembly ensures uniform force on the cable, avoiding measurement errors caused by uneven force, further improving test accuracy. The fixed pulley assembly can simultaneously perform tension tests on two sections of the same cable, completing more tests within the same timeframe and significantly shortening overall test time. The fixed pulley assembly, in conjunction with the lifting mechanism, can simultaneously test two sections of the cable, or perform separate tension tests on the two sections, meeting different testing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is a schematic structural diagram of a tensile testing device for cable processing proposed by the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure in which the test mechanism and part of the rack are removed;

[0027] Figure 3 for Figure 1Schematic diagram of the connection between the rack and the mobile frame after removing the test mechanism;

[0028] Figure 4 Schematic diagram of the mobile frame and its internal structure;

[0029] Figure 5 This is an enlarged view of the structure of the testing mechanism of a tensile testing device for cable processing proposed by the present invention;

[0030] Figure 6 for Figure 5 Schematic diagram of the structure after removing the protective box and stretching motor;

[0031] Figure 7 for Figure 6 Schematic diagram of the structure after removing one of the mounting frames and the stretching driving wheel and stretching driven wheel;

[0032] Figure 8 This is an enlarged view of the structure of the connecting frame in the tensile testing device for cable processing proposed by the present invention;

[0033] Figure 9 This is an enlarged view of the structure of the tensile threaded tube portion of a tensile testing device for cable processing proposed by the present invention;

[0034] Figure 10 This is an enlarged view of the structure of the clamping sleeve part of the tension testing device for cable processing proposed by the present invention.

[0035] In the figure: 1. frame; 2. protective cover; 3. ball screw; 4. moving frame; 5. lifting motor; 6. fixed pulley; 7. guide frame; 8. guide rod; 9. guide wheel; 10. supporting seat; 11. mounting frame; 12. protective box; 13. connecting frame; 14. mounting hole; 15. moving hole; 16. limit frame; 17. clamping sleeve; 18. adjusting wheel; 19. dial indicator; 20. limit thread sleeve; 21. stretching threaded tube; 22. limit rod; 23. limit notch; 24. stretching motor; 25. stretching driving wheel; 26. stretching driven wheel; 27. synchronous sleeve; 28. displacement sensor; 29. ​​docking cavity; 30. end gear ring; 31. interlocking groove; 32. positioning groove; 33. positioning strip; 34. guide screw; 35. meshing gear; 36. clamping pliers; 37. docking gear. DETAILED DESCRIPTION Example 1

[0036] like Figure 1 and Figure 4-10 As shown, a tensile testing device for cable processing includes a frame 1,

[0037] The outer sliding sleeve of the frame 1 is provided with a moving frame 4;

[0038] Two symmetrically arranged testing mechanisms are installed inside the mobile frame 4. The testing mechanism includes a stretching assembly and two symmetrically arranged clamping assemblies, and the clamping assemblies are symmetrically arranged at both ends of the stretching assembly. The stretching assembly includes two symmetrically arranged stretching threaded tubes 21, one of which is symmetrically provided with a plurality of limiting notches 23, and the end of the other stretching threaded tube 21 is symmetrically provided with a plurality of limiting rods 22, and the limiting rods 22 are clamped in the limiting notches 23. The stretching threaded tube 21 is externally threadedly connected to the limiting threaded sleeve 20, and the end of one of the limiting threaded sleeves 20 is fixedly connected to a synchronous sleeve 27, and the stretching threaded tube 21 is located in the synchronous sleeve 27. Multiple connecting frames 13 are installed between the two limiting threaded sleeves 20 to ensure the synchronization of the movement of the two limiting threaded sleeves 20;

[0039] The inner wall of the movable frame 4 is symmetrically installed with a mounting frame 11, and the test mechanisms are all installed on the same group of mounting frames 11, and the clamping components are all slidably connected to the mounting frame 11; a limit frame 16 is installed outside the clamping component, and a displacement sensor 28 is installed in the middle of the limit frame 16. A movable hole 15 is opened on the side wall of the mounting frame 11, and the limit frame 16 is slidably connected in the movable hole 15. When the tensile component drives the cable to stretch and move, the limit frame 16 moves in the movable hole 15. A mounting hole 14 is also opened on the mounting frame 11, and the displacement sensor 28 is located in the mounting hole 14.

[0040] The testing mechanism also includes a driving assembly, and the driving assembly drives the stretching assembly to stretch the cable. The driving assembly includes a stretching motor 24 and a protective box 12, and the stretching motor 24 and the protective box 12 are both installed on both sides of the mounting frame 11 at corresponding positions. The output shaft of the stretching motor 24 extends through the mounting hole 14 into the protective box 12 and is installed with a stretching active wheel 25. A stretching driven wheel 26 is installed outside the synchronous sleeve 27, and the stretching driven wheel 26 is engaged with the stretching active wheel 25.

[0041] The clamping assembly includes a clamping sleeve 17, and the clamping sleeve 17 is fixedly connected to the end of the tensile threaded tube 21 at the corresponding position. A plurality of fitting grooves 31 are symmetrically provided on the inner side wall of the clamping sleeve 17. Clamping clamps 36 are slidably connected in the fitting grooves 31, and the clamping clamps 36 are located in the clamping sleeve 17. The end face of the clamping clamp 36 away from the fitting groove 31 is fixedly connected with a clamping plate, and the length of the clamping plate is greater than the length of the end face of the clamping clamp 36, and the width of the clamping plate is greater than the width of the end face of the clamping clamp 36. A rubber anti-slip pad is installed on the clamping plate. A plurality of positioning grooves 32 are symmetrically provided on the inner side wall of the fitting groove 31, and a plurality of positioning strips 33 are symmetrically provided on the outer side wall of the clamping clamp 36, and the positioning The strip 33 is clamped in the positioning groove 32, and a guide screw 34 is horizontally installed in the engaging groove 31, and the guide screw 34 is threadedly connected to the position clamp 36; an annular cavity and a docking cavity 29 are also provided in the clamping sleeve 17, and the engaging grooves 31 are connected to the annular cavity, and the docking cavity 29 is connected to the annular cavity, an end face gear ring 30 is installed in the annular cavity, and an engaging gear 35 is installed on the lead screw 34, and the engaging gear 35 is meshed with the end face gear ring 30; a mounting shaft is horizontally installed in the docking cavity 29, and a docking gear 37 is installed on the mounting shaft, and the docking gear 37 is meshed with the end face gear ring 30, and one end of the mounting shaft extends to the outside of the clamping sleeve 17 and is installed with an adjusting wheel 18.

[0042] The clamping assembly ensures the coaxiality of the cable and the clamping sleeve 17 through reasonable structural design, synchronous adjustment mechanism and high-precision cooperation. The fitting groove 31 and the positioning groove 32 on the inner wall of the clamping sleeve 17 cooperate with the clamping clamp 36 and the positioning bar 33 respectively to ensure that the clamping clamp moves stably and accurately, so that the cable is evenly stressed and centered in the clamping sleeve 17. When the adjusting wheel 18 is turned, the docking gear drives the end gear ring 30, so that the meshing gear 35 on the lead screw 34 rotates synchronously, realizing the synchronous movement of the clamping clamp 36, ensuring that the cable is evenly stressed in all directions. In addition, the lead screw 34 is threadedly connected to the clamping clamp 36 and the positioning bar 33 is engaged with the positioning groove 32 with high precision, so that The clamping jaws 36 move precisely along a predetermined trajectory, so that the cable axis and the center line of the clamping sleeve are precisely aligned, and the cable is kept in a central position in the clamping sleeve 17, thereby ensuring the coaxiality of the cable and the clamping sleeve 17; ensuring the coaxiality of the cable and the clamping sleeve allows the cable to be uniformly stressed during the tensile test, avoiding eccentric stress and causing local stress concentration, thereby more accurately measuring performance indicators such as cable tensile strength and elongation, improving the accuracy and reliability of the results, and at the same time, reducing the risk of cable damage due to eccentric additional bending or shear force, extending the service life of the sample, and reducing the wear of test equipment such as fixtures and stretching mechanisms, thereby improving equipment stability and life.

[0043] During use, the adjustment wheel 18 is rotated, which in turn drives the mounting shaft, causing the docking gear 37 on the mounting shaft to rotate accordingly. The docking gear 37 meshes with the face gear ring 30 within the annular cavity, driving the face gear ring 30 to rotate. The face gear ring 30, in turn, meshes with the meshing gears 35 on each lead screw 34, causing the lead screw 34 to rotate. Because the lead screw 34 is threadedly connected to the clamping jaws 36, and the clamping jaws 36 are restrained from rotating by the positioning bars 33 engaging the positioning grooves 32 within the engagement groove 31, when the lead screw 34 rotates, the clamping jaws 36 move axially within the engagement groove 31 along the lead screw 34. Multiple clamping jaws 36 move synchronously toward or away from each other, using the clamping plates and rubber non-slip pads to securely clamp the cable within the clamping sleeve 17. This secures the two ends of the cable corresponding to the test area to the clamping assembly of the test device.

[0044] Cable stretching: Start the stretching motor 24, and the output shaft of the stretching motor 24 drives the stretching driving wheel 25 to rotate in the protective box 12. The stretching driving wheel 25 engages with the stretching driven wheel 26 outside the synchronous sleeve 27, thereby driving the synchronous sleeve 27 to rotate. Since the synchronous sleeve 27 is fixedly connected to one of the limiting threaded sleeves 20, and the two limiting threaded sleeves 20 are connected by the connecting frame 13 to ensure synchronous movement, when the synchronous sleeve 27 rotates, the two limiting threaded sleeves 20 rotate synchronously. Because the limiting threaded sleeve 20 is threadedly connected to the stretching threaded tube 21, and the two stretching threaded tubes 21 are limited in relative rotation by the limiting rod 22 and the limiting notch 23, when the limiting threaded sleeve 20 rotates, the two stretching threaded tubes 21 move closer to or farther away from each other, thereby stretching or relaxing the cable.

[0045] Test process monitoring: Before conducting a cable tension test, you must first ensure that the displacement sensor 28 is correctly installed and debugged. After starting the stretching motor 24, the stretching assembly begins to stretch the cable. As the cable is stretched, the clamping assembly connected to it will move, thereby driving the limit frame 16 to move synchronously in the movable hole 15 of the mounting frame 11. At this time, the displacement sensor 28 installed between the limit frame 16 and the mounting frame 11 will sense the changes in the relative position between the two in real time. The displacement sensor 28 transmits the measured displacement data to the data acquisition system in real time. The data acquisition system records these displacement data at a certain sampling frequency and converts them into intuitive numerical values ​​or graphs for display. By observing these data and graphs, the operator can understand the changes in the elongation of the cable during the stretching process in real time. For example, it is possible to clearly see the elongation speed of the cable in different tension stages, and determine whether the cable is stretched within the elastic range and whether it is approaching or reaching its stretching limit.

[0046] During the test, the data acquisition system will perform real-time analysis on the data transmitted by the displacement sensor 28. If there is an abnormal displacement change, such as a sudden increase in elongation, excessive elongation speed, or a large deviation from the preset normal range, the system will promptly issue an early warning signal to alert the operator. This may mean that there is a quality problem with the cable, such as internal damage, uneven material, etc., or a malfunction in the test device, such as a stuck tensile component or loose clamping. The operator can stop the test in time according to the early warning information, check the cable and test device, and ensure the safety and accuracy of the test. When the cable is stretched to the predetermined tensile value or breaks, the stretching motor 24 is stopped and the test is completed. The data acquisition system will save the displacement data during the entire test process, and these data can be further processed and analyzed later. For example, the mechanical performance parameters such as the elongation and elastic modulus of the cable can be calculated and compared with relevant standards or expected values ​​to evaluate the quality and performance of the cable. Example 2

[0047] Based on the first embodiment, Figure 1-Figure 4 As shown, a lifting mechanism is provided on the frame 1, which drives the mobile frame 4 to move on the frame 1. The lifting mechanism includes a protective cover 2 vertically mounted on the frame 1, a ball screw 3 vertically mounted in the protective cover 2, a lifting motor 5 mounted at one end of the ball screw 3, a supporting seat 10 mounted on the inner side wall of the mobile frame 4, and the supporting seat 10 is connected to the ball screw 3, a plurality of guide rods 8 are symmetrically arranged on the frame 1, a plurality of guide frames 7 are symmetrically mounted in the mobile frame 4, a plurality of guide wheels 9 are symmetrically mounted on the guide frames 7, and the guide wheels 9 are clamped on the guide rods 8 at corresponding positions;

[0048] The fixed pulley group is installed on the top of the frame 1. The fixed pulley group includes a plurality of symmetrically arranged fixed pulleys 6. The positions of the fixed pulleys 6 at both ends correspond to the positions of the clamping sleeves 17 to ensure that when the cable is wound on the fixed pulley group in a free vertical state, the axis of the cable and the center line of the clamping sleeve 17 are roughly on the same line with a small deviation. In the cable tension testing device, the fixed pulley group is used to perform tension tests on two sections of the same cable simultaneously or separately, and the performance test of the two sections of the cable can be completed in the same time. Compared with testing the two sections of the cable separately, the overall test time is greatly shortened and the test efficiency is improved. At the same time, the two sections of the cable are tension tested at the same time and under the same environmental conditions, which can minimize the differences caused by test time intervals, environmental factors (such as temperature and humidity changes), etc., ensure the consistency of the test conditions of the two sections of the cable, make the test results more comparable, and more accurately evaluate the overall quality stability and performance uniformity of the cable. At the same time, in actual applications, the cable may be subjected to tension at multiple locations simultaneously. By performing tension tests on two sections of the cable at the same time, the stress conditions of the cable under actual working conditions can be more realistically simulated, thereby more accurately evaluating the performance and reliability of the cable under complex stress conditions.

[0049] When in use, the moving frame 4 is raised or lowered: the lifting motor 5 is started, and the motor drives the ball screw 3 to rotate in the protective cover 2. Since the supporting seat 10 is connected with the ball screw 3, and the moving frame 4 is sleeved on the frame 1, when the ball screw 3 rotates, the supporting seat 10 is driven by the screw to drive the moving frame 4 to slide up and down along the guide rod 8 on the frame 1. Multiple guide rods 8 cooperate with the guide wheels 9 on the guide frame 7 in the moving frame 4 to stabilize the movement trajectory of the moving frame 4 and ensure that the moving frame 4 can be lifted and lowered vertically and smoothly.

[0050] Test mechanism preparation: Install the fixed pulley assembly on top of frame 1. Wind the cable around the fixed pulley assembly, with both ends positioned within the clamping sleeve 17. The fixed pulley assembly ensures that when the cable is in a free vertical position, its axis roughly coincides with the centerline of the clamping sleeve 17, ensuring uniform force on the cable during tension. Place both ends of the cable in the clamping assemblies of the two test mechanisms. Place the cable to be tested horizontally on a suitable support platform, ensuring that the cable is naturally straight and free of bends or twists. Pass both ends of the cable sequentially through the clamping assemblies and tensioning assemblies (i.e., the clamping sleeve 17 and the tensioning threaded tube 21) of the two test mechanisms. Use a marking tool, such as a permanent marker, to mark the cable at regular intervals (e.g., every 50 cm) along its length, dividing the cable into multiple areas for easy subsequent random selection. The area to be subjected to the tensile test will be randomly determined based on the number of marked areas. For example, if the cable is marked into 20 areas, a random number between 1 and 20 is generated by a random number generator to determine the corresponding test area, and the lifting motor 5 is turned on. The lifting motor 5 drives the ball screw 3 in the protective cover 2 to rotate. Due to the movement, the supporting seat 10 on the inner wall of 4 is connected with the ball screw 3, and the guide wheel 9 on the guide frame 7 is clamped on the guide rod 8. The rotation of the ball screw 3 will cause the moving frame 4 to move smoothly up or down along the guide rod 8. As the moving frame 4 moves, the testing mechanism is moved to the selected area for tensile testing. Randomly selecting a cable part for testing can more comprehensively reflect the quality status of the entire cable. The lifting mechanism drives the moving frame 4 to move for tensile testing, which further enhances the effectiveness of this sampling test. It can accurately evaluate the tensile performance of cables in different parts without damaging the entire cable, and timely discover possible quality defects of the cable. Example 3

[0051] Based on the second embodiment, Figure 6-Figure 7 as well as Figure 9-10 As shown, a dial indicator 19 is inserted into the clamping sleeve 17, and the probe of dial indicator 19 is located within the clamping sleeve 17. When the cable is subjected to tension, in addition to axial elongation, it will also experience slight radial deformation at the clamping position. Dial indicator 19 has high-precision measurement capabilities, with an accuracy of 0.01mm or even higher. Placing its probe within the clamping sleeve 17 in direct contact with the cable can capture these extremely subtle deformations in real time. By analyzing the radial deformation of the cable at different tension stages, it is possible to understand the internal structural changes of the cable when it is subjected to stress, such as the starting point and development process of elastic and plastic deformation, providing a detailed basis for evaluating the quality and reliability of the cable.

[0052] At the same time, the dial indicator 19 can monitor the position change of the cable in the clamping sleeve 17. When the clamping force changes, the position of the cable will change accordingly, and the reading of the dial indicator 19 will also fluctuate accordingly. By observing the changes in the reading of the dial indicator 19, the operator can promptly detect the instability of the clamping force and take timely measures to adjust it, such as re-tightening the clamp, to ensure that the cable does not slip during the entire test process and ensure the smooth progress of the test;

[0053] In the same measuring mechanism, by comparing the readings of the dial indicator 19 at both ends of the cable, it can be determined whether the clamping forces at both ends are equivalent. If the readings of the dial indicator 19 at both ends are significantly different, it means that there may be obvious deviations in the clamping forces at both ends. Based on the comparison results of the readings of the dial indicator 19, the operator can adjust the clamping forces at both ends to make the clamping forces at both ends close to the same, ensuring that the cable is uniformly stressed as a whole during the stretching process, thereby improving the accuracy and repeatability of the test results.

[0054] The cable deformation data measured by the dial indicator can be used as a reference standard to calibrate other measuring equipment. For example, it can be compared with the cable elongation data measured by the displacement sensor. If a significant deviation is found between the two, the displacement sensor 28 can be calibrated or adjusted to improve the accuracy of the measuring equipment.

Claims

1. A tensile testing device for cable processing, comprising a frame, characterized in that: A movable frame is slidably connected to the outside of the frame; A lifting mechanism, the lifting mechanism being installed on the frame to drive the movable frame to move on the frame; The lifting mechanism includes a vertically mounted ball screw, one end of which is mounted with a lifting motor, a supporting seat mounted on the inner side wall of the movable frame, and the supporting seat is connected to the ball screw, a plurality of guide rods are symmetrically arranged on the frame, a plurality of guide frames are symmetrically mounted in the movable frame, a plurality of guide wheels are symmetrically mounted on the guide frames, and the guide wheels are clamped on the guide rods at corresponding positions; A fixed pulley assembly is installed on the top of the frame, and the fixed pulley assembly includes a plurality of symmetrically arranged fixed pulleys; Two symmetrically arranged testing mechanisms, each of which is installed inside the moving frame, each of which includes a stretching assembly and two symmetrically arranged clamping assemblies, wherein the clamping assemblies are symmetrically arranged at both ends of the stretching assembly; The stretching assembly includes two symmetrically arranged stretching threaded tubes, one of which is symmetrically provided with a plurality of limiting notches, and the other end of the stretching threaded tube is symmetrically provided with a plurality of limiting rods, and the limiting rods are all clamped in the limiting notches, the outer surfaces of the stretching threaded tubes are threadedly connected to the limiting threaded sleeves, and a plurality of connecting frames are installed between the two limiting threaded sleeves, the end of one of the limiting threaded sleeves is fixedly connected to a synchronous sleeve, and the stretching threaded tube is located in the synchronous sleeve; The clamping assembly includes a clamping sleeve, and the clamping sleeve is fixedly connected to the end of the stretched threaded tube; The testing mechanism further includes a driving component, and the driving component drives the stretching component to stretch the cable; The driving assembly includes a stretching motor and a protective box. The output shaft of the stretching motor extends into the protective box and is equipped with a stretching driving wheel. A stretching driven wheel is installed outside the synchronous sleeve, and the stretching driven wheel is meshed with the stretching driving wheel.

2. A tensile testing device for cable processing according to claim 1, characterized in that: The inner side wall of the movable frame is symmetrically installed with a mounting frame, and the testing mechanism is installed on the mounting frame. A limit frame is installed outside the clamping assembly, and a displacement sensor is installed in the middle of the limit frame. A movable hole is opened on the side wall of the mounting frame, and the sliding end of the limit frame is movably connected to the movable hole. A mounting hole is also opened on the mounting frame, and the displacement sensor is located in the mounting hole.

3. A tensile testing device for cable processing according to claim 1, characterized in that: A plurality of engaging grooves are symmetrically formed on the inner side wall of the clamping sleeve, wherein the engaging grooves are all slidably connected with a clamping pliers, and the clamping pliers are located in the clamping sleeve, and a guide screw is horizontally installed in the engaging groove, and the guide screw is threadedly connected to the clamping pliers; The clamping sleeve is further provided with an annular cavity and a docking cavity, and the engaging grooves are communicated with the annular cavity, and the docking cavity is communicated with the annular cavity. An end face gear ring is installed in the annular cavity, and meshing gears are installed on the lead screws, and the meshing gears are meshed with the end face gear ring. A mounting shaft is horizontally mounted in the docking cavity, a docking gear is mounted on the mounting shaft, and the docking gear is meshed with the end face gear ring, and one end of the mounting shaft extends outside the clamping sleeve and is mounted with an adjusting wheel.

4. A tensile testing device for cable processing according to claim 3, characterized in that: A plurality of positioning grooves are symmetrically provided on the inner side wall of the engaging groove, a plurality of positioning bars are symmetrically installed on the outer side wall of the clamping pliers, and the positioning bars are all clamped in the positioning grooves.

5. The cable processing tensile testing device according to claim 1, characterized in that: A dial indicator is inserted into the clamping sleeve, and a probe of the dial indicator is located inside the clamping sleeve.

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