Copper alloy wire flexibility mechanical bending fatigue testing machine
By designing a copper alloy wire flexibility mechanical bending fatigue testing machine, using a drive motor and cylinder to control the reciprocating motion of the bending arm, combined with a wire feeding shaft and clamping device, the difficulties in parameter adjustment and continuity of existing equipment were solved, and accurate testing of the fatigue performance of copper alloy wire was achieved.
Patent Information
- Application Number
- CN202511419159.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2025-12-23
AI Technical Summary
Existing copper alloy wire bending fatigue testing equipment is difficult to adjust parameters according to actual application scenarios, resulting in a large deviation between test results and the material failure patterns in actual use. In addition, it lacks a stable wire feeding and continuous feeding mechanism, which is prone to jamming and local stress concentration, affecting the accuracy and consistency of the test.
A copper alloy wire flexibility mechanical bending fatigue testing machine was designed. The machine uses a drive motor and cylinder to control the reciprocating motion of the bending arm, combined with a wire feeding shaft and clamping device, including moving, adjusting and gripping devices. The copper alloy wire is uniformly clamped and continuously bent by pulleys and cylinders to simulate the bending situation in actual use.
It enables accurate testing of the fatigue performance of copper alloy wires, avoids local stress concentration and test result distortion, ensures the continuity and consistency of testing, and is adaptable to copper alloy wires of different diameters and materials.
Smart Images
Figure CN121185809A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of copper alloy wire bending, in particular to a copper alloy wire flexibility mechanical bending fatigue testing machine. BACKGROUND
[0002] In the fields of electronics, automobiles, aerospace, etc., copper alloy wires are widely used in wire harness connection, precision component lead, etc. due to their good electrical conductivity and mechanical strength. The current industry's testing methods for copper alloy wire bending fatigue mainly have the following technical pain points, which are difficult to meet the efficient and accurate testing requirements: 1. Traditional testing equipment mainly uses fixed-angle and single-frequency bending methods, which cannot adjust parameters according to the actual application scenarios of copper alloy wires, resulting in large deviations between test results and material failure laws in actual use, and making it difficult to truly reflect the fatigue performance of products in service process; On the one hand, the existing equipment relies on manual fixing for wire clamping, which not only has low operation efficiency, but also is prone to local stress concentration of copper alloy wires due to uneven force of operators, resulting in hidden damage at the initial stage of testing and interfering with the final test results. On the other hand, for testing of coiled copper alloy wires, there is a lack of stable pay-off and continuous feeding mechanisms, which are prone to jamming and stretching deformation during wire release, thereby destroying the continuity and consistency of the test. Most of the existing clamping devices are rigid clamping structures, which cannot adjust the clamping force according to the diameter and material hardness of copper alloy wires. Overly loose clamping is prone to displacement of the wire during bending, and overly tight clamping will directly damage the surface or internal structure of the wire, both of which will cause distortion of the test results, especially for thin-diameter and thin-walled copper alloy wires. Based on this, the present application provides a copper alloy wire flexibility mechanical bending fatigue testing machine to solve the above problems. SUMMARY
[0003] The present application aims to provide a copper alloy wire flexibility mechanical bending fatigue testing machine to solve the problems raised in the background.
[0004] To achieve the above-mentioned purpose, the present application provides the following technical solution: a copper alloy wire flexibility mechanical bending fatigue testing machine, comprising a rack, which is used as the support structure of the whole testing machine and is the frame of the entire device, generally made of solid materials such as steel, serving to stabilize the device and bear other components, a driving motor connected to the hollow part inside the rack, which is used to transmit power to the bending execution part to ensure that the bending action is performed according to the set frequency and angle, a first air cylinder connected to both sides of one end of the rack, two output shaft ends of the first air cylinder are movably connected with bending arms, and the two first air cylinders are used to drive the bending arms to open, facilitating the operator to put the copper alloy wire into the designated work station. Two said bending arms can reciprocate according to the set angle and frequency, so that the copper alloy wire is repeatedly bent at the fixed point, so as to simulate the bending condition in actual use, and then test the flexibility and fatigue performance of the copper alloy wire. The other end of the two sides of the rack is connected with a pay-off shaft, the pay-off shaft is used for winding the copper alloy wire into a roll on the shaft, gradually releasing the wire during the test process, providing continuous samples for the bending test, and the top of the rack is connected with a hollow plate corresponding to the hollow part, the hollow plate is used for accelerating heat dissipation to avoid high temperature in the body. The front end of the rack is connected with a clamping device, the clamping device includes a moving device, an adjusting device and a grabbing device, the moving device drives the top fixedly connected adjusting device to move synchronously, then the adjusting device adjusts its length, so as to drive the top fixedly connected grabbing device to grab the copper alloy wire and move to the pay-off shaft direction, which can uniformly distribute the clamping force and avoid affecting the test results due to local stress concentration.
[0005] As a preferred technical solution of the present application, the moving device includes four pulleys, four said pulleys are movably connected with lifting columns at the top, four said lifting columns are fixedly connected with a bottom plate at the top, and two first sliding rods are fixedly connected with the bottom plate at the top.
[0006] As a preferred technical solution of the present application, two said first sliding rods are movably connected with first sliding blocks on the outer surface, two said first sliding blocks are fixedly connected with a first moving plate at the top, the first moving plate is fixedly connected with an adjusting device at the top, a first driving assembly is fixedly connected with the first moving plate at the rear end and the bottom of the first driving assembly is fixedly connected with one end of the bottom plate at the top.
[0007] As a preferred technical solution of the present application, the adjusting device includes two support blocks, two said support blocks are fixedly connected with the top of the first moving plate at the bottom, two said support blocks are fixedly connected with a second driving assembly at the top, and the output shaft end of the second driving assembly is fixedly connected with one end of the push plate.
[0008] As a preferred technical solution of the present application, the other end of the push plate is fixedly connected with a second moving plate, the top of the second moving plate is fixedly connected with a grabbing device at both ends, the bottom center of the second moving plate is fixedly connected with a second sliding block, and the bottom groove of the second sliding block is movably connected with a second sliding rod.
[0009] As a preferred technical solution of the present application, the grabbing device includes a fixed block, the bottom of the fixed block is fixedly connected with the top of the second moving plate, the center and both ends of the fixed block are fixedly connected with a third driving assembly and two contraction rods, and the top of the third driving assembly and the two contraction rods is fixedly connected with a movable block.
[0010] As a preferred technical scheme of the present application, the second cylinder is fixedly connected to the hollow part inside the movable block, the disc is fixedly connected to the output shaft end of the second cylinder, the three long columns are fixedly connected to the top of the disc, the three long columns are in through connection with the top of the movable block, the first elliptical plate is movably connected to the top of each long column, the grabber bottom one end is movably connected to the top inside of each first elliptical plate, the second elliptical plate is movably connected to the other end of each grabber bottom, and the second elliptical plate is fixedly connected to the top protruding part of the movable block.
[0011] Compared with the prior art, the present application has the following advantages: A copper alloy wire flexibility mechanical bending fatigue testing machine, by setting a pulley at the bottom of the lifting column, the rolling characteristics of the pulley can be used to move the device to different positions, and the lifting column can also be adjusted in height, so as to provide a suitable working height for subsequent grabbing work. When the first driving assembly drives the first moving plate fixedly connected to the output shaft end to move, the first sliding block fixedly connected to the bottom of the first moving plate will smoothly slide horizontally along the outer surface of the first sliding rod. This guiding structure can ensure that the first moving plate drives the adjusting device fixedly connected to the top to strictly move along the preset track.
[0012] A copper alloy wire flexibility mechanical bending fatigue testing machine, by setting the supporting block and the second sliding rod on the top of the first moving plate, it can move forward synchronously with the first moving plate. After adjusting to the appropriate position, the second driving assembly drives the push plate fixedly connected to the output shaft end and the second moving plate fixedly connected to the other end of the push plate to move left and right synchronously, and in the moving process, the second moving plate will smoothly slide on the outer surface of the second sliding rod through the second sliding block fixedly connected to the bottom. This double guiding structure can ensure the moving precision, so that the grabbing device can obtain a suitable operating orientation.
[0013] A copper alloy wire flexibility mechanical bending fatigue testing machine, by setting the fixed block on the top of the second moving plate, it can be moved to the appropriate position under the adjustment of the second driving assembly. When the third driving assembly drives the movable block fixedly connected to the output shaft end to move forward, the contraction rods located at both ends of the movable block will move synchronously. This structure not only can disperse the load generated by the device on the top of the movable block, but also can continue to extend the length and expand the operation range, so as to ensure the smooth extension of the movable block.
[0014] The utility model provides a kind of copper alloy wire flexibility mechanical bending fatigue testing machine, by setting disc at the output shaft end of second cylinder, when second cylinder telescopes, disc will drive its top fixed connection three long columns reciprocating at movable block top, while, the bottom of first oval plate located long column top two sides movable connection is synchronously stretched, to pull the bottom one end of its top movable connection grab and clamp center contraction in turn.And the other end of grab and clamp bottom is only in situ rotation by movable connection with the top of second oval plate. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is schematic diagram of side structure of the utility model; Figure 2 It is schematic diagram of side structure of the utility model; Figure 3 It is schematic diagram of whole of clamping device of the utility model; Figure 4 It is schematic diagram of moving device of the utility model; Figure 5 It is schematic diagram of adjusting device of the utility model; Figure 6 It is schematic diagram of up and down connection of first moving plate of the utility model; Figure 7 It is schematic diagram of bottom connection of grab device of the utility model; Figure 8 It is schematic diagram of top connection of grab device of the utility model.
[0016] In the drawing: 1, rack;2, drive motor;3, first cylinder;4, bending arm;6, pay-off shaft;7, hollow plate;8, clamping device;81, moving device;811, pulley;812, lifting column;813, bottom plate;814, first sliding rod;815, first sliding block;816, first moving plate;817, first drive assembly;82, adjusting device;821, support block;822, second drive assembly;823, push plate;824, second moving plate;825, second sliding block;826, second sliding rod;83, grab device;831, fixed block;832, third drive assembly;833, contraction rod;834, movable block;835, second cylinder;836, disc;837, long column;838, first oval plate;839, grab and clamp;8310, second oval plate. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0018] Example: Please refer to Figures 1-2 A copper alloy wire flexibility mechanical bending fatigue testing machine includes a frame 1, which serves as the overall support structure for the testing machine and is the framework of the entire equipment. It is generally made of sturdy materials such as steel and plays a role in stabilizing the equipment and supporting other components. A drive motor 2 is connected to the hollow part inside the frame 1. The drive motor 2 is used to transmit power to the bending execution part to ensure that the bending action is performed according to the set frequency and angle. A first cylinder 3 is connected to both sides of one end of the frame 1. A bending arm 4 is provided at the output shaft end of each of the two first cylinders 3, and the output shaft ends of the two first cylinders 3 are movably connected to the inner side of the bending arm 4. The two first cylinders 3 are used to drive the bending arm 4 to open, so that the operator can place the copper alloy wire into the designated work position. The two bending arms 4 can reciprocate at a set angle and frequency, causing the copper alloy wire to bend repeatedly at a fixed point, thereby simulating the bending situation in actual use and testing the flexibility and fatigue performance of the copper alloy wire. The other end of both sides of the frame 1 is connected to a wire feeding shaft 6. The wire feeding shaft 6 is used to put the coiled copper alloy wire on the shaft and gradually release the wire as the test progresses, providing a continuous sample for bending test. The top of the frame 1 is connected to a corresponding perforated plate 7. The perforated plate 7 is used to accelerate heat dissipation and avoid high temperature inside the machine body. The front end of the frame 1 is connected to a clamping device 8, which includes a moving device 81, an adjusting device 82, and a gripping device 83. The moving device 81 first drives the adjusting device 82, which is fixedly connected to its top, to move synchronously. Then, the adjusting device 82 adjusts its own length to facilitate the gripping device 83, which is fixedly connected to its top, to grip the copper alloy wire and move it towards the wire feeding shaft 6. This structure can make the clamping force evenly distributed and avoid the test results being affected by local stress concentration.
[0019] Example 2: Based on Example 1, as follows Figures 3-8 As shown, the moving device 81 includes four pulleys 811, each of which has a lifting column 812 on its top, and the tops of the four pulleys 811 are movably connected to the bottoms of the lifting columns 812. Each of the four lifting columns 812 has a base plate 813 on its top, and the tops of the four lifting columns 812 are fixedly connected to the bottom of the base plate 813 at all four ends. Each of the two grooves at the top of the base plate 813 has a first sliding rod 814, and the two grooves at the top of the base plate 813 are fixedly connected to the bottoms of the first sliding rods 814.
[0020] Each of the two first sliding rods 814 has a first sliding block 815 on its outer surface, and the outer surfaces of the two first sliding rods 814 are movably connected to the bottom groove of the first sliding block 815. A first moving plate 816 is provided on the top of the two first sliding blocks 815, and the top of the two first sliding blocks 815 is fixedly connected to the bottom ends of the first moving plate 816. An adjustment device 82 is provided on the top of the first moving plate 816, and the top of the first moving plate 816 is fixedly connected to the bottom of the adjustment device 82. A first drive assembly 817 is provided at the rear center of the first moving plate 816, and the rear center of the first moving plate 816 is fixedly connected to the output shaft end of the first drive assembly 817. By providing a pulley 811 at the bottom of the lifting column 812, the rolling characteristics of the pulley 811 can be used to move the entire device to different positions. At the same time, the lifting column 812 can also be adjusted vertically to provide a suitable working height for subsequent gripping operations. When the first drive assembly 817 drives the first movable plate 816, which is fixedly connected to its output shaft end, to move, the first sliding blocks 815, which are fixedly connected to both ends of the bottom of the first movable plate 816, will slide smoothly horizontally along the outer surface of the first sliding rod 814. This guiding structure ensures that when the first movable plate 816 drives the top-fixed adjusting device 82 to move upwards towards the wire feeding shaft 6, it runs strictly along a preset trajectory, avoiding directional deviation. Furthermore, the bottom of the first drive assembly 817 is fixedly connected to one end of the top of the base plate 813.
[0021] The adjustment device 82 includes two support blocks 821. The bottom of each of the two support blocks 821 is fixedly connected to the top of the first moving plate 816. A second drive assembly 822 is provided on the top of the two support blocks 821, and the top of the two support blocks 821 is fixedly connected to the outer surface of the rear end of the second drive assembly 822. A push plate 823 is provided at the output shaft end of the second drive assembly 822, and one end of the push plate 823 is fixedly connected to the output shaft end of the second drive assembly 822.
[0022] The other end of the push plate 823 is provided with a second moving plate 824, and the other end of the push plate 823 is fixedly connected to the top end of the second moving plate 824. Both ends of the top of the second moving plate 824 are provided with gripping devices 83, and both ends of the top of the second moving plate 824 are fixedly connected to the bottom of the gripping devices 83. The bottom center of the second moving plate 824 is provided with a second sliding block 825, and the bottom center of the second moving plate 824 is fixedly connected to the top of the second sliding block 825. The bottom groove of the second sliding block 825 is provided with a second sliding rod 826. By setting both the support block 821 and the second sliding rod 826 on the top of the first moving plate 816, it can move forward synchronously with the first moving plate 816. After being adjusted to the appropriate position, the second drive assembly 822 drives the push plate 823, which is fixedly connected to its output shaft end, and the second moving plate 824, which is fixedly connected to the other end of the push plate 823, to move synchronously in the left and right directions. During the movement, the second moving plate 824 slides smoothly on the outer surface of the second sliding rod 826 through the second sliding block 825, which is fixedly connected to its bottom. This dual guide structure ensures the movement accuracy, so that the gripping device 83 can not only move forward and backward with the first moving plate 816, but also obtain a suitable operating position through the left and right adjustment of the second moving plate 824. Furthermore, the groove at the bottom of the second sliding block 825 is movably connected to the outer surface of the second sliding rod 826.
[0023] The gripping device 83 includes a fixed block 831. The bottom of the fixed block 831 is fixedly connected to the top of the second moving plate 824. The center and both ends of the fixed block 831 are provided with a third drive assembly 832 and two retractable rods 833. The center and both ends of the fixed block 831 are fixedly connected to the bottom outer surface of the third drive assembly 832 and the two retractable rods 833. The top of the third drive assembly 832 and the two retractable rods 833 is provided with a movable block 834. By setting the fixed block 831 on the top of the second moving plate 824, it can be moved to a suitable position under the adjustment of the second drive assembly 822. When the third drive assembly 832 drives the movable block 834, which is fixedly connected to its output shaft end, to move forward, the retractable rods 833 located at both ends of the movable block 834 will extend and retract synchronously. This structure can not only distribute the load generated by the top device of the movable block 834 and avoid excessive local stress leading to component deformation, but also ensure that the movable block 834 extends smoothly forward in a straight line through the guiding and supporting effect of the retractable rods 833. This allows the gripping device 83 to extend its working length on the original basis, expanding the operating range to adapt to gripping needs under different working conditions. Furthermore, the top of the third drive assembly 832 and the two retractable rods 833 are fixedly connected to the bottom of the movable block 834.
[0024] A second cylinder 835 is installed in the hollow part inside the movable block 834, and the hollow part inside the movable block 834 is fixedly connected to the bottom of the second cylinder 835. A disc 836 is installed at the output shaft end of the second cylinder 835, and the output shaft end of the second cylinder 835 is fixedly connected to the center of the bottom of the disc 836. Three long columns 837 are installed on the top of each disc 836, and the top of each disc 836 is fixedly connected to the bottom of the three long columns 837. The outer surface of the three long columns 837 is connected through to the top of the movable block 834. A first elliptical plate 838 is installed on both sides of the top of each of the three long columns 837, and the top sides of each of the three long columns 837 are movably connected to the inner bottom of the first elliptical plate 838. Each side is equipped with a gripper 839 at its bottom, and the inner sides of the tops of the three first elliptical plates 838 are movably connected to one end of the gripper 839 at its bottom. The other end of the bottom of each of the three grippers 839 is equipped with a second elliptical plate 8310, which is movably connected to the inner side of the top of the second elliptical plate 8310. A disc 836 is located at the output shaft end of the second cylinder 835. When the second cylinder 835 extends or retracts, the disc 836 drives the three long columns 837 fixedly connected to its top to reciprocate at the top of the movable block 834. Simultaneously, the bottoms of the first elliptical plates 838, movably connected to the tops of the long columns 837, are stretched synchronously, thereby pulling one end of the gripper 839 movably connected to its top towards the center. The other end of the gripper 839, movably connected to the top of the second elliptical plate 8310, only rotates in place. Through this linkage structure, the gripper 839 achieves a closing action under tension at one end, thereby gripping the copper alloy wire and moving it towards the outer surface of the wire feeding shaft 6. Furthermore, the bottoms of the three second elliptical plates 8310 are all fixedly connected to the protruding part on the top of the movable block 834.
[0025] in: Base plate 813: The top two ends are provided with groove structures, which can be precisely engaged with the two first sliding rods 814 to achieve stable fixation of the bottom of the first sliding rods 814; Support block 821: It is L-shaped and can fit and limit the outer surface of the second drive component 822, thereby achieving a stable fixation of the second drive component 822. Push plate 823: The connecting part at its other end is provided with a groove structure, which can be matched and fitted with the top end of the second moving plate 824 to facilitate the stable fixation of the two. Retractable rod 833: It has the function of extending and retracting inward, and its length can be adjusted by its own extension and retraction to provide a suitable space for the smooth extension of the subsequent device and ensure the smoothness of the extension action; Movable block 834: Its top is provided with a hollow structure. The size of the hollow part is adapted to the outer surface contour of the second cylinder 835, so as to achieve precise fixation with the bottom of the second cylinder 835. Long column 837: Its top is designed with an arc shape, which reduces contact friction with the bottom of the first elliptical plate 838 and facilitates flexible connection between the two. Gripper 839: It is L-shaped, with one end of its bottom movably connected to the top of the first elliptical plate 838 and the other end movably connected to the top of the second elliptical plate 8310. The two connection points form a suitable lever arm relationship with the corner of the L-shaped structure to ensure stable transmission of the gripping action.
[0026] The working principle of this invention is as follows: First, the coiled copper alloy wire is placed on the unwinding shaft 6. The unwinding shaft 6, through its own rotational characteristics, gradually releases the copper alloy wire as the test progresses, providing a continuous and stable wire sample for the bending test and preventing disruption to the test continuity due to wire breakage or supply interruption. Simultaneously, the drive motor 2 inside the frame 1 is activated, transmitting power to the bending arm 4 to provide the power source for subsequent bending actions, and pre-setting the bending frequency and angle parameters. Next, the clamping device 8 at the front end of the frame 1 is activated. The clamping device 8 first adjusts the overall position of the device by the rolling characteristics of the pulley 811 in its moving device 81, and then adjusts the height by the lifting column 812 to match the height of the wire feeding shaft 6 and the copper alloy wire. Subsequently, the first drive assembly 817 will drive the first moving plate 816 fixedly connected to its output shaft end to move. After the first moving plate 816 is moved, the first sliding block 815 fixedly connected to both ends of the bottom of the first moving plate 816 will slide horizontally along the outer surface of the first sliding rod 814. This ensures that the first moving plate 816 drives the top adjustment device 82 to move strictly along the preset trajectory towards the wire feeding shaft 6. The two support blocks 821 in the adjustment device 82 will move synchronously with the first moving plate 816. After moving to the appropriate position, the second drive component 822 will drive the push plate 823 fixed at the output shaft end for a second time, so that the push plate 823 can drive the second moving plate 824 fixed at the other end to move left and right synchronously. During the movement, the second moving plate 824 will slide smoothly along the outer surface of the second sliding rod 826 through the second sliding block 825 connected to the bottom center to ensure the accuracy of the movement, and then align the gripping device 83 at the top with the copper alloy wire. At this time, after the fixed block 831 in the gripping device 83 is in the matching position along with the second moving plate 824, the third driving component 832 can drive the movable block 834 fixedly connected to its output shaft end to move forward. The retractable rods 833 located at both ends of the movable block 834 will also move synchronously to distribute the load of the device on the top of the movable block 834 and ensure the smooth extension of the device. The second cylinder 835, fixed in the hollow part inside the movable block 834, extends and retracts accordingly, which can drive the disc 836 fixed at the output shaft end and the three long columns 837 fixed at the top of the disc 836 to move back and forth at the top of the movable block 834. At this time, the bottom of the first elliptical plate 838, which is movably connected to the top of the long column 837, will be stretched synchronously, thereby pulling the bottom end of the gripper 839, which is movably connected to the top, to retract towards the center. The other end of the gripper 839 rotates only in place through the movable connection with the top of the second elliptical plate 8310, so that the gripper 839 achieves a closing action under the pulling force at one end to grip the copper alloy wire. Afterwards, the clamping device 8 adjusts the position and height of the moving device 81 and makes fine adjustments to the left and right of the adjusting device 82 to accurately guide the copper alloy wire to the designated work position of the bending arm 4 connected to the corresponding side of one end of the frame 1.
[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A copper alloy wire flexibility mechanical bending fatigue testing machine, comprising a frame (1), characterized in that: The frame (1) has a hollowed-out section connected to a drive motor (2). The drive motor (2) is used to transmit power to the bending execution part to ensure that the bending action is performed according to the set frequency and angle. The frame (1) has two corresponding first cylinders (3) connected to one side. The output shaft ends of the two first cylinders (3) are movably connected to bending arms (4). The two first cylinders (3) are used to drive the bending arms (4) to open, so that the operator can put the copper alloy wire into the designated work position. The two bending arms (4) can reciprocate at a set angle and frequency, causing the copper alloy wire to bend repeatedly at a fixed point, thereby simulating the bending situation in actual use. The other end of the frame (1) is connected to a wire feeding shaft (6). The wire feeding shaft (6) is used to put the coiled copper alloy wire on the shaft and gradually release the wire as the test progresses, providing a continuous sample for bending test. A hollow plate (7) is connected to the hollow part at the top of the frame (1). The front end of the frame (1) is connected to a clamping device (8). The clamping device (8) includes a moving device (81), an adjusting device (82), and a gripping device (83). The moving device (81) will first drive the adjusting device (82) fixedly connected to its top to move synchronously. Then, the adjusting device (82) adjusts its own length to facilitate the gripping device (83) fixedly connected to its top to grip the copper alloy wire and move it towards the wire feeding shaft (6).
2. The copper alloy wire flexibility mechanical bending fatigue testing machine according to claim 1, characterized in that: The moving device (81) includes four pulleys (811), each of the four pulleys (811) is movably connected to a lifting column (812), and the top of each of the four lifting columns (812) is fixedly connected to a base plate (813). The top of the base plate (813) is fixedly connected to the grooves at both ends of the top of the base plate (813) with a first sliding rod (814).
3. The copper alloy wire flexibility mechanical bending fatigue testing machine according to claim 2, characterized in that: The outer surfaces of the two first sliding rods (814) are movably connected to first sliding blocks (815), the tops of the two first sliding blocks (815) are fixedly connected to first moving plates (816), the tops of the first moving plates (816) are fixedly connected to adjusting devices (82), the rear center of the first moving plates (816) is fixedly connected to a first driving assembly (817), and the bottom of the first driving assembly (817) is fixedly connected to one end of the top of the base plate (813).
4. The copper alloy wire flexibility mechanical bending fatigue testing machine according to claim 3, characterized in that: The adjustment device (82) includes two support blocks (821), the bottom of which is fixedly connected to the top of the first moving plate (816), and the top of the two support blocks (821) is fixedly connected to a second drive assembly (822), and the output shaft end of the second drive assembly (822) is fixedly connected to one end of a push plate (823).
5. The copper alloy wire flexibility mechanical bending fatigue testing machine according to claim 4, characterized in that: The other end of the push plate (823) is fixedly connected to a second moving plate (824). Both ends of the top of the second moving plate (824) are fixedly connected to gripping devices (83). The bottom center of the second moving plate (824) is fixedly connected to a second sliding block (825). The bottom groove of the second sliding block (825) is movably connected to a second sliding rod (826).
6. The copper alloy wire flexibility mechanical bending fatigue testing machine according to claim 5, characterized in that: The gripping device (83) includes a fixed block (831), the bottom of which is fixedly connected to the top of the second moving plate (824). A third drive assembly (832) and two retractable rods (833) are fixedly connected to the center and both ends of the fixed block (831). A movable block (834) is fixedly connected to the top of the third drive assembly (832) and the two retractable rods (833).
7. A copper alloy wire flexibility mechanical bending fatigue testing machine according to claim 6, characterized in that: A second cylinder (835) is fixedly connected to the hollow part inside the movable block (834). A disc (836) is fixedly connected to the output shaft end of the second cylinder (835). Three long columns (837) are fixedly connected to the top of each disc (836), and the outer surface of the three long columns (837) is connected through the top of the movable block (834). A first elliptical plate (838) is movably connected to the top of each of the three long columns (837). One end of the bottom of a gripper (839) is movably connected to the inner side of the top of each of the three first elliptical plates (838). A second elliptical plate (8310) is movably connected to the other end of the bottom of each of the three grippers (839), and the bottom of each of the three second elliptical plates (8310) is fixedly connected to the protruding part on the top of the movable block (834).