Tension testing device for cable processing

Abstract

The invention relates to the technical field of cable testing, and discloses a tension testing device for cable processing, which comprises a rack, and a moving frame is slidably connected outside the rack; the lifting mechanism is mounted on the rack to drive the moving frame to move on the rack; the fixed pulley block is mounted at the top of the rack, and the fixed pulley block comprises a plurality of fixed pulleys which are symmetrically arranged; the two testing mechanisms are symmetrically arranged, the testing mechanisms are installed in the moving frame, each testing mechanism comprises a stretching assembly and two clamping assemblies which are symmetrically arranged, and the clamping assemblies are symmetrically arranged at the two ends of the stretching assembly; the testing mechanism further comprises a driving assembly, the driving assembly drives the stretching assembly to stretch the cable, the cable tension testing device can flexibly and randomly select tension testing objects for the cable, and the quality difference of different positions of the whole cable is comprehensively reflected.

Description

Technical Field

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

[0002] In many fields such as power transmission, communication networks, and industrial automation, cables are key components for power and signal transmission. Their quality and performance are directly related to the stable operation and safety and reliability of the system. The tensile performance of cables is one of the important indicators to measure their quality. It reflects the ability of cables to resist damage when subjected to tensile forces. Therefore, it is of vital importance to accurately and efficiently perform tensile testing on cables.

[0003] At present, the traditional cable tension test method has many shortcomings. Most of the current cables are fixed in a winding manner for tension testing, which has low test efficiency. In addition, due to the tightness of the winding, there will be a certain reserved length, which affects the accuracy of the test tension. And because the winding has tightness, there will be a certain reserved length, which affects the accuracy of the test tension. When the cable is tested in a wound state, it is easy to be eccentric, and it is difficult to ensure the coaxiality of the cable and the clamping component, 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 also may cause the cable to be damaged before reaching the actual tensile limit due to local stress concentration.

[0004] Although a cable tensile testing device for cable processing disclosed in Chinese patent application No. 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 object, the present invention provides the following technical solution: a tensile testing device for cable processing, comprising a frame, and further comprising: A moving frame, the moving frame is sleeved on the frame and slidably connected to the frame; A lifting mechanism, wherein the lifting mechanism is installed on the frame to drive the moving frame to move on the frame; A fixed pulley block, which is installed on the top of the frame and includes a plurality of fixed pulleys that are symmetrically arranged; Two symmetrically arranged testing mechanisms, and the testing mechanisms are installed inside the moving frame, the testing mechanisms include a stretching assembly and two symmetrically arranged clamping assemblies, and the clamping assemblies are symmetrically arranged at both ends of the stretching assembly; The testing mechanism also includes a driving component, and the driving component drives the stretching component to stretch the cable.

[0008] 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, and 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, and 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.

[0009] 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 grooves, 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 grooves with relative positions, the outside of the stretching threaded tubes are threadedly connected with limit thread sleeves, and a plurality of connecting frames are installed between the two limit thread sleeves.

[0010] As a further solution of the present invention, mounting frames are symmetrically installed on the inner side walls of the movable frame, and the testing mechanisms are all installed on the same group of mounting frames. Limit frames are installed outside the clamping components, and a displacement sensor is installed in the middle of the limit frame. Moving holes are opened on the side walls of the mounting frame, and the limit frame is slidably connected in the moving hole. A mounting hole is also opened on the mounting frame, and the displacement sensor is located in the mounting hole.

[0011] As a further solution of the present invention, one end of the position-limiting threaded sleeve is fixedly connected to a synchronous sleeve, and the correspondingly positioned stretching threaded tube is located inside the synchronous sleeve; The driving assembly comprises a stretching motor and a protection box. The output shaft of the stretching motor extends into the protection box and is provided with a stretching driving wheel. A stretching driven wheel is provided outside the synchronous sleeve, and the stretching driven wheel is meshed with the stretching driving wheel.

[0012] As a further solution 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, and a plurality of engaging grooves are symmetrically opened on the inner side wall of the clamping sleeve, and the clamping pliers are slidably connected in the engaging grooves, 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 also 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 gear is 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.

[0013] 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, a plurality of positioning strips are symmetrically installed on the outer side wall of the clamping pliers, and the positioning strips are all clamped in the positioning grooves.

[0014] As a further solution of the present invention, a dial indicator is inserted into the clamping sleeve, and a probe of the dial indicator is located inside the clamping sleeve.

[0015] The present invention cooperates with the ball screw of the lifting mechanism and the supporting seat, combined with the guide rod and the guide wheel, so that the moving frame can be lifted and lowered smoothly, providing a stable environment for cable stretching, and driving the moving frame and the measuring mechanism to perform local selectable measurement on the cable. The fixed pulley group ensures that the cable is evenly stressed, avoiding measurement errors caused by uneven stress, and further improving the test accuracy. The fixed pulley group can be used to perform tension tests on two sections of the same cable at the same time, completing more test content in the same time, greatly shortening the overall test time. The fixed pulley group can be used to cooperate with the lifting mechanism to test the two sections of the cable at the same time, and can also perform separate tension tests on the two sections of the cable to meet different test requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a schematic structural diagram of a tensile testing device for cable processing proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure in which the test mechanism and part of the rack are removed; Figure 3 for Figure 1 A schematic diagram of the structure of the connection between the rack and the moving frame after removing the test mechanism; Figure 4 It is a schematic diagram of the mobile frame and its internal structure; Figure 5 This is an enlarged view of the structure of a testing mechanism in a tensile testing device for cable processing proposed by the present invention; Figure 6 for Figure 5 Schematic diagram of the structure after removing the protective box and stretching motor; Figure 7 For Figure 6 Schematic diagram of the structure after removing one mounting bracket, the stretching driving wheel and the stretching driven wheel; Figure 8 Enlarged view of the partial structure of the connecting frame in a tensile test device for cable processing proposed by the present invention; Fig. 9 Enlarged view of the partial structure of the stretching threaded tube in a tensile test device for cable processing proposed by the present invention; Fig.10 Enlarged view of the partial structure of the clamping sleeve in a tensile test device for cable processing proposed by the present invention.

[0017] In the figure: 1, frame; 2, protective sleeve; 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 bracket; 12, protective box; 13, connecting frame; 14, mounting hole; 15, moving hole; 16, limiting frame; 17, clamping sleeve; 18, adjusting wheel; 19, dial indicator; 20, limiting threaded sleeve; 21, stretching threaded tube; 22, limiting rod; 23, limiting notch; 24, stretching motor; 25, stretching driving wheel; 26, stretching driven wheel; 27, synchronous sleeve; 28, displacement sensor; 29, docking cavity; 30, end face gear ring; 31, fitting groove; 32, positioning groove; 33, positioning strip; 34, guiding screw; 35, engaging gear; 36, clamping pliers; 37, docking gear. Specific embodiments Embodiment 1

[0018] As Figure 1 and Figure 4-Figure 10 shown, a tensile test device for cable processing includes a frame 1, A moving frame 4 is slidably sleeved outside the frame 1; Two symmetrically arranged test mechanisms, and the test mechanisms are installed inside the moving frame 4. The test mechanisms include a stretching component and two symmetrically arranged clamping components, and the clamping components are symmetrically arranged at both ends of the stretching component. The stretching component includes two symmetrically arranged stretching threaded tubes 21. A plurality of limiting notches 23 are symmetrically opened on one of the stretching threaded tubes 21, and a plurality of limiting rods 22 are symmetrically arranged at the end of the other stretching threaded tube 21, and the limiting rods 22 are clamped in the limiting notches 23. The stretching threaded tube 21 is externally threaded with a limiting threaded sleeve 20. One end of one of the limiting threaded sleeves 20 is fixedly connected with a synchronous sleeve 27, and the stretching threaded tube 21 is located inside the synchronous sleeve 27. A plurality of connecting frames 13 are jointly installed between the two limiting threaded sleeves 20 to ensure the synchronous movement of the two limiting threaded sleeves 20; 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 frames 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 stretching 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.

[0019] The testing mechanism also includes a driving component, and the driving component drives the stretching component to stretch the cable. The driving component 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 driving wheel 25. A stretching driven wheel 26 is installed outside the synchronous sleeve 27, and the stretching driven wheel 26 is meshed with the stretching driving wheel 25.

[0020] The clamping assembly includes a clamping sleeve 17, and the clamping sleeve 17 is fixedly connected to the end of the stretched threaded tube 21 at a 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 surface 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 surface of the clamping clamp 36, and the width of the clamping plate is greater than the width of the end surface 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 installed 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 guide 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, 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.

[0021] The clamping assembly ensures the coaxiality of the cable and the clamping sleeve 17 through reasonable structural design, synchronous adjustment mechanism and high-precision matching. The fitting groove 31 and the positioning groove 32 on the inner wall of the clamping sleeve 17 respectively cooperate with the clamping clamp 36 and the positioning strip 33 to ensure stable and accurate movement of the clamping clamp, 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 face gear ring 30 to make the meshing gear 35 on the guide screw 34 rotate synchronously, so as to realize the synchronous movement of the clamping clamp 36 and ensure that the cable is evenly stressed in all directions. In addition, the threaded connection between the guide screw 34 and the clamping clamp 36 and the high-precision engagement of the positioning strip 33 and the positioning groove 32 make 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 centered 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 evenly stressed during the tension test, avoiding eccentric stress and causing local stress concentration, thereby more accurately measuring performance indicators such as the tensile strength and elongation of the cable, improving the accuracy and reliability of the results, and at the same time, reducing the risk of the cable being damaged 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 the stability and life of the equipment.

[0022] When in use, the adjusting wheel 18 is rotated, and the adjusting wheel 18 drives the installation shaft to rotate, and the docking gear 37 on the installation shaft rotates accordingly. Since the docking gear 37 meshes with the end face gear ring 30 in the annular cavity, the end face gear ring 30 is driven to rotate. The end face gear ring 30 is meshed with the meshing gear 35 on each lead screw 34, so that the lead screw 34 rotates. Because the lead screw 34 is threadedly connected with the clamping pliers 36, and the clamping pliers 36 are limited in rotation by the positioning strip 33 and the positioning groove 32 in the fitting groove 31, when the lead screw 34 rotates, the clamping pliers 36 move along the axial direction of the lead screw 34 in the fitting groove 31, and multiple clamping pliers 36 are synchronously approached or moved away, and the cable is firmly clamped in the clamping sleeve 17 by the clamping plate and the rubber anti-slip pad, so that the two ends of the cable corresponding to the test area are respectively fixed on the clamping assembly of the test device.

[0023] 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 is meshed 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 through 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 through the limiting rod 22 and the limiting notch 23, when the limiting threaded sleeve 20 rotates, the two stretching threaded tubes 21 are close to or away from each other, so as to achieve the stretching or relaxation of the cable.

[0024] Test process monitoring: Before conducting a cable tension test, 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 moves, thereby driving the limit frame 16 to move synchronously in the moving 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 change 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 charts for display. By observing these data and charts, 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 close to or reaches its stretching limit.

[0025] During the test, the data acquisition system will analyze the data transmitted by the displacement sensor 28 in real time. If the displacement change is abnormal, such as a sudden increase in elongation, too fast elongation speed, or a large deviation from the preset normal range, the system will promptly issue an early warning signal to remind the operator to pay attention. This may mean that there are quality problems with the cable, such as internal damage, uneven material, etc., or a failure in the test device, such as a stuck tensile component, loose clamping, etc. The operator can stop the test in time according to the early warning information, check the cable and the test device, and ensure the safety and accuracy of the test. When the cable is stretched to a predetermined tension 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 are calculated, compared with relevant standards or expected values, and the quality and performance of the cable are evaluated. Embodiment 2

[0026] Based on the first embodiment, Figure 1-Figure 4 As shown, a lifting mechanism is provided on the frame 1, and the lifting mechanism drives the moving frame 4 to move on the frame 1. The lifting mechanism includes a protective cover 2 vertically installed on the frame 1, a ball screw 3 is vertically installed in the protective cover 2, a lifting motor 5 is installed at one end of the ball screw 3, a supporting seat 10 is installed on the inner side wall of the moving frame 4, and the supporting seat 10 is connected with 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 installed in the moving frame 4, a plurality of guide wheels 9 are symmetrically installed on the guide frame 7, and the guide wheels 9 are clamped on the guide rods 8 at corresponding positions; A fixed pulley block is installed on the top of the frame 1. The fixed pulley block 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 sleeve 17, so as to ensure that when the cable is wound on the fixed pulley block 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 block is used to perform tension tests on two sections of the same cable simultaneously or separately, so that the performance detection 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 tension tests on the two sections of the cable are performed at the same time and under the same environmental conditions, so as to minimize the differences caused by the test time interval, environmental factors (such as temperature and humidity changes), etc., to ensure the consistency of the test conditions of the two sections of the cable, so that the test results are more comparable, and the overall quality stability and performance uniformity of the cable can be more accurately evaluated. At the same time, in actual applications, the cable may be subjected to tension at multiple locations at the same time. 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.

[0027] 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 sleeve 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 vertically and smoothly.

[0028] Preparation of the test mechanism: The fixed pulley block is installed on the top of the frame 1, and the cable is wound on the fixed pulley block, with both ends located in the clamping sleeve 17. The fixed pulley block ensures that when the cable is in a free vertical state, its axis roughly coincides with the center line of the clamping sleeve 17, so that the cable is evenly stressed during the stretching process. The two ends of the cable are placed in the clamping assemblies of the two test mechanisms respectively, and the cable to be tested is placed horizontally on a suitable support platform to ensure that the cable is in a naturally straight state to avoid bending or twisting, and the two ends of the cable are passed through the clamping assemblies and the stretching assemblies (i.e., the clamping sleeve 17 and the stretching threaded tube 21) on the two test mechanisms in turn. Use a marking tool, such as a marker, to mark along the length of the cable at a certain interval (for example, every 50 cm), and divide the cable into multiple areas to facilitate subsequent random selection. According to the number of areas marked on the cable, randomly determine the area to be subjected to the tensile test. 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 the moving frame 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. Without damaging the entire cable, the tensile performance of cables at different parts can be accurately evaluated, and possible quality defects of the cable can be discovered in time. Embodiment 3

[0029] Based on the second embodiment, Figure 6-Figure 7 as well as Figure 9-10 As shown, a dial gauge 19 is inserted into the clamping sleeve 17, and the probe of the dial gauge 19 is located in the clamping sleeve 17. When the cable is under tension, in addition to axial elongation, a slight radial deformation will occur at the clamping position. The dial gauge 19 has a high-precision measurement capability, which can be accurate to 0.01mm or even higher. By placing its probe in the clamping sleeve 17 and in direct contact with the cable, these extremely subtle deformations can be captured in real time. By analyzing the radial deformation of the cable at different tension stages, the internal structural changes of the cable when it is under stress can be understood, such as the starting point and development process of elastic deformation and plastic deformation, etc., providing a detailed basis for evaluating the quality and reliability of the cable; At the same time, the dial gauge 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 gauge 19 will also fluctuate accordingly. The operator can timely discover the instability of the clamping force by observing the changes in the reading of the dial gauge 19, and take timely measures to adjust it, such as re-tightening the clamp, etc., to ensure that the cable will not slip during the entire test process, ensuring the smooth progress of the test; 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 them close to the same, thereby ensuring that the cable is uniformly stressed as a whole during the stretching process and improving the accuracy and repeatability of the test results.

[0030] 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 large 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, wherein the lifting mechanism is installed on the frame to drive the moving frame to move on the frame; The frame is provided with a lifting mechanism, the lifting mechanism includes a vertically mounted ball screw, one end of the ball screw is provided with a lifting motor, a supporting seat is provided on the inner side wall of the moving frame, and the supporting seat is connected with the ball screw, a plurality of guide rods are symmetrically arranged on the frame, a plurality of guide frames are symmetrically arranged in the moving frame, a plurality of guide wheels are symmetrically arranged on the guide frames, and the guide wheels are clamped on the guide rods corresponding to the positions; A fixed pulley block, which is installed on the top of the frame and includes a plurality of fixed pulleys that are symmetrically arranged; Two symmetrically arranged testing mechanisms, and the testing mechanisms are installed inside the moving frame, the testing mechanisms include a stretching assembly and two symmetrically arranged clamping assemblies, and the clamping assemblies are symmetrically arranged at both ends of the stretching assembly; The testing mechanism also includes a driving component, and the driving component drives the stretching component to stretch the cable.

2. A tensile testing device for cable processing according to claim 1, characterized in that: 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, the outside of the stretching threaded tube is threadedly connected with a limit threaded sleeve, and a plurality of connecting frames are installed between the two limit threaded sleeves.

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

4. A tensile testing device for cable processing according to claim 3, characterized in that: One end of the position-limiting threaded sleeve is fixedly connected to a synchronous sleeve, and the stretching threaded tube is located inside the synchronous sleeve; The driving assembly comprises a stretching motor and a protection box. The output shaft of the stretching motor extends into the protection box and is provided with a stretching driving wheel. A stretching driven wheel is provided outside the synchronous sleeve, and the stretching driven wheel is meshed with the stretching driving wheel.

5. A tensile testing device for cable processing according to claim 3, characterized in that: The clamping assembly includes a clamping sleeve, and the clamping sleeve is fixedly connected to the end of the stretched threaded tube, and a plurality of engaging grooves are symmetrically opened on the inner side wall of the clamping sleeve, and the engaging grooves are all slidably connected with clamping pliers, and the clamping pliers are located in the clamping sleeve, and the engaging grooves are horizontally installed with guide screws, and the guide screws are all threadedly connected with the clamping pliers; The clamping sleeve is also provided with an annular cavity and a docking cavity, and the engaging grooves are all connected with the annular cavity, and the docking cavity is connected with the annular cavity, an end face gear ring is installed in the annular cavity, and a meshing gear is installed on the lead screw, and the meshing gear is 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.

6. A tensile testing device for cable processing according to claim 5, characterized in that: A plurality of positioning grooves are symmetrically provided on the inner side wall of the engaging groove, a plurality of positioning strips are symmetrically installed on the outer side wall of the clamping pliers, and the positioning strips are all clamped in the positioning grooves.

7. A tensile testing device for cable processing according to claim 6, 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.

Images