Fatigue characteristic detection method for copper alloy wire

Abstract

The invention discloses a method for detecting fatigue characteristics of a copper alloy wire, which comprises the following steps of: 1, selecting a sample, randomly extracting 10-15 coils of wires from a produced copper alloy wire coil material, and eliminating subjective influence by randomly extracting the copper alloy wire coil material, so that the sample has objectivity; therefore, the sample can be uniformly distributed in the whole, the error index of the measured sample is reduced, and the purpose of deducing the overall index by using the sample index is achieved. According to the fatigue characteristic detection method for the copper alloy wire, the sample can be treated, so that the surface smoothness of the sample can be ensured, whether the size of the sample meets the detection standard or not can be determined, and the synchronous bending and twisting of the wire can be realized under the action of the swinging mechanism and the rotating mechanism; therefore, the anti-fatigue characteristic of the wire sample in the bending and twisting state can be better detected and simulated, the detection can better meet the actual use requirement, and the accuracy of the detection data can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of copper alloy wire material detection, and in particular to a method for detecting fatigue characteristics of a copper alloy wire material. Background Art

[0002] Copper alloy wire is an alloy made of pure copper and one or more other elements, which is stretched and formed. It has good electrical conductivity, wear resistance, ductility and corrosion resistance, and is widely used in various fields. After the production of copper alloy wire is completed, fatigue properties of copper alloy wire need to be tested to ensure its quality.

[0003] In the actual operation of the existing copper alloy wire tensile test, the fatigue properties of the copper alloy wire are mainly tested by bending the copper alloy wire through a swing mechanism. During the actual use of the copper alloy wire, the copper alloy wire may also be twisted. It is difficult to fully detect the fatigue properties of the copper alloy wire only through bending detection. Therefore, in response to the above problems, a fatigue properties detection method of copper alloy wire is designed to better meet the actual detection needs. Summary of the invention

[0004] The object of the present invention is to provide a method for detecting fatigue properties of a copper alloy wire to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for detecting fatigue properties of a copper alloy wire, comprising the following steps:

[0006] Step 1: Sample selection: randomly select 10-15 coils of copper alloy wire from the produced copper alloy wire coils. Randomly selecting copper alloy wire coils can eliminate subjective influences and make the samples objective, so that the samples can be evenly distributed in the whole, reducing the error index of the measured samples, so as to achieve the purpose of inferring the overall index with the sample index;

[0007] Step 2: Sample preparation. After the sample selection is completed, each sample coil is processed according to the actual test needs to facilitate subsequent testing;

[0008] Step 3: Clamping and fixing of the sample. After the sample is prepared, fix the two ends of the sample on the swing mechanism and the clamping mechanism respectively through the clamping mechanism to ensure the stability of the sample installation, and at this time the sample remains in a straight state;

[0009] Step 4: Anti-fatigue test: After the sample is clamped and fixed, the fatigue test machine is started to perform anti-fatigue test on the sample. During the test, the number of bending times of the wire is counted by the counting device, and the camera can be used to detect whether the wire is broken, so that the signal can be fed back to the PLC controller to stop the device when the wire is broken;

[0010] Step 5: Analyze the anti-fatigue characteristics of the samples based on the test data. After all samples are tested, the anti-fatigue performance of the wire can be determined by taking the average value based on the test data of the samples.

[0011] Preferably, the preparation of the sample includes cutting, processing and re-inspection of the sample. For the cutting of the sample, 100 mm of each selected copper alloy wire coil is cut by a cutting machine, and one sample is cut from each copper alloy wire coil. When cutting the copper alloy wire coil, 50 mm-100 mm of the end of the copper alloy wire coil is first removed. By removing part of the material at the end of the copper alloy wire coil, it is possible to effectively avoid scratches and cracks at the end of the wire that affect the accuracy of the test data.

[0012] Preferably, after the sample length is cut, the surface of the sample wire is processed by a mechanical grinding and polishing device to ensure that the surface of the sample wire is smooth, and after the sample wire is ground and polished, it needs to be wiped with cotton cloth to avoid residual debris and residue. By processing the cut sample wire, the accuracy of the test data can be guaranteed.

[0013] Preferably, the sample re-inspection, after the sample processing is completed, the length and diameter of the sample are measured by a measuring tool to ensure that the length and diameter of all samples are within the standard error range to ensure the accuracy of the subsequent test data, wherein the standard error of the sample wire length is plus or minus 5% of the total length, wherein the standard error range of the sample wire diameter φ is φ≤2.5mm 2 The sample wire has a diameter error of ±0.1mm and a diameter of 2.5mm 2 <φ≤10mm 2 The diameter error of the sample wire is ±0.2mm, and the diameter is greater than φ>10mm 2 The diameter error of the sample wire is ±0.2mm.

[0014] Preferably, the anti-fatigue test includes swing angle adjustment and wire fatigue property test. During the test of the sample wire, the installation position of the round rod on the disc is adjusted according to the test requirements of the sample wire, thereby realizing the swing angle adjustment of the swing mechanism to better meet the actual test requirements.

[0015] Preferably, the swinging speed of the swinging mechanism is 10-60 times / min. The speed of the motor can be adjusted according to actual detection requirements, thereby adjusting the swinging speed of the swinging mechanism. By controlling the swinging speed of the swinging mechanism, it can be effectively avoided that the swinging speed is too fast, which may cause stress concentration and premature damage of the material during the bending process, thereby concealing the true performance of the material; while a too slow rate may cause the material to undergo irreversible damage such as creep under long-term stress, thereby affecting the accuracy of the results.

[0016] Preferably, the fatigue property detection of the wire includes bending of the wire and twisting of the wire. During the bending of the wire, the swing mechanism is driven by a motor to swing back and forth in an orderly manner, thereby driving the sample wire to swing, and the positioning function of the positioning rod is cooperated so that the sample wire is bent when it contacts the positioning rod. The reciprocating bending of the sample wire can realize the anti-fatigue detection of the sample wire, and the number of swings of the swing mechanism is counted by a counter to determine the anti-fatigue characteristics of the sample wire. Through the above-mentioned mechanism, a basic guarantee can be provided for the anti-fatigue property detection of the sample wire.

[0017] Preferably, the twisting of the wire, during the sample wire testing process, when the wire is bent, cooperates with the action of the rotating mechanism to synchronously realize the reciprocating twisting action of the sample wire. Through the twisting of the sample wire, the anti-fatigue characteristics of the sample wire in a simultaneous bending and twisting state can be tested. The rotation action of the rotating mechanism can provide a basic guarantee for realizing the twisting and bending detection of the wire.

[0018] Preferably, the fatigue detection machine includes a shell, a motor, a disc, a round rod, a swing mechanism, a rotating mechanism and a clamping mechanism, a positioning rod is fixed to the front end surface of the shell, and a cross bar is also fixed to the shell, a motor is fixed in the shell, and a disc is fixed to the output end of the motor, and a round rod is fixed to the disc by bolts, and the round rod is connected to the swing mechanism and the rotating mechanism, and the swing mechanism includes a swing frame, a fixed plate, a sliding rod and a spring, the swing frame bearing is connected to the shell, and the swing frame and the round rod are slidably connected, and a fixed plate is fixed to the swing frame, and a sliding connection is made on the fixed plate. A sliding rod, a spring is fixed between the sliding rod and the fixed plate, and a clamping mechanism is fixed to the lower end of the sliding rod, the rotating mechanism includes a movable frame, a convex gear rod, a gear and a rotating shaft, the movable frame and the round rod are slidably connected, and the movable frame and the cross bar are slidably connected, and a convex gear rod is fixed to the front end of the movable frame, and the convex gear rod is meshed with the gear, the gear is fixed on the rotating shaft, and the rotating shaft bearing is connected to the front end surface of the shell, and a clamping mechanism is fixed to the upper end of the rotating shaft. Through the above structure, the swing mechanism and the rotating mechanism can be synchronously driven to operate, thereby providing basic guarantee for the normal progress of sample detection.

[0019] Preferably, the clamping mechanism includes a fixed frame, a bidirectional threaded rod, a clamping plate and a guide rod, the bearing on the fixed frame is connected to the bidirectional threaded rod, and the bidirectional threaded rod is connected to the clamping plate through threads, and the clamping plate is provided with protective grooves, and the clamping plate and the guide rod fixed on the fixed frame are slidably connected. Through the above structure, the end of the sample wire can be clamped and fixed to ensure the stability of the sample wire installation.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The fatigue property detection method of the copper alloy wire can ensure the smoothness of the sample surface and determine whether the size of the sample meets the detection standard by processing the sample. In combination with the swing mechanism and the rotation mechanism, the synchronous bending and twisting of the wire can be realized, so as to better detect the fatigue resistance of the simulated wire sample under the bending and twisting state, thereby making the detection more in line with the actual use needs, and then ensuring the accuracy of the detection data;

[0022] 2. The fatigue characteristics detection method of the copper alloy wire, when detecting the sample wire, can clamp and fix the two ends of the sample wire through the action of the fixed frame, the bidirectional threaded rod, the clamping plate and the guide rod, and can drive the sample wire to swing with the action of the motor, the disc, the round rod, the swing frame and the fixed plate, and can realize the fixed-point bending detection of the sample wire with the action of the positioning rod. During the bending detection process, the rotation of the sample wire can be realized with the action of the motor, the disc, the round rod, the movable frame, the convex tooth rod, the gear and the rotating shaft, so that the sample wire is twisted synchronously during the bending process, so as to detect the fatigue resistance of the wire sample in the bent and twisted state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall detection process of the present invention;

[0024] Figure 2 Schematic diagram of the preparation process of the sample of the present invention;

[0025] Figure 3 This is a schematic diagram of the anti-fatigue detection process of the present invention;

[0026] Figure 4 It is a schematic diagram of the fatigue property detection process of the wire rod of the present invention;

[0027] Figure 5 It is a schematic diagram of the front view of the three-dimensional structure of the detection mechanism of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the shell section of the present invention;

[0029] Figure 7It is a schematic diagram of the front view of the three-dimensional structure of the rotating mechanism and the clamping mechanism of the present invention;

[0030] Figure 8 It is a schematic diagram of the exploded three-dimensional structure of the rotating mechanism and the clamping mechanism of the present invention.

[0031] In the figure: 1. housing; 101. positioning rod; 102. cross bar; 2. motor; 3. disc; 4. round rod; 5. swing mechanism; 501. swing frame; 502. fixed plate; 503. slide rod; 504. spring; 6. rotating mechanism; 601. movable frame; 602. convex gear rod; 603. gear; 604. rotating shaft; 7. clamping mechanism; 701. fixed frame; 702. bidirectional threaded rod; 703. clamping plate; 704. guide rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 8 The present invention provides a technical solution: a method for detecting fatigue properties of a copper alloy wire, comprising the following steps:

[0034] Step 1: Sample selection: randomly select 10-15 coils of copper alloy wire from the produced coils (and the cross-sectional area A of the selected samples is equal). Randomly selecting copper alloy wire coils can eliminate subjective influences and make the samples objective, so that the samples can be evenly distributed in the whole, reducing the error index of the measured samples, so as to achieve the purpose of inferring the overall index with the sample index;

[0035] Step 2: Sample preparation. After the sample selection is completed, each sample coil is processed according to the actual test needs to facilitate subsequent testing;

[0036] Step 3: Clamping and fixing of the sample. After the sample is prepared, the two ends of the sample are fixed to the swing mechanism 5 and the clamping mechanism 7 respectively through the clamping mechanism 7 to ensure the stability of the sample installation, and at this time the sample remains in a straight state;

[0037] Step 4: Anti-fatigue test: After the sample is clamped and fixed, the fatigue test machine is started to perform anti-fatigue test on the sample. During the test, the number of bending times of the wire is counted by the counting device, and the camera can be used to detect whether the wire is broken, so that the signal can be fed back to the PLC controller to stop the device when the wire is broken;

[0038] Step 5: Analyze the anti-fatigue characteristics of the samples based on the test data. After all samples are tested, the anti-fatigue performance of the wire can be determined by taking the average value based on the test data of the samples.

[0039] The preparation of samples includes cutting, processing and re-inspection of samples. For cutting, each selected copper alloy wire coil is cut by a cutting machine to 100mm, and one sample is cut from each copper alloy wire coil. When cutting the copper alloy wire coil, 50mm-100mm is removed from the end of the copper alloy wire coil. For processing, after the sample length is cut, the surface of the sample wire is processed by a mechanical grinding and polishing device to ensure that the surface of the sample wire is smooth. After the sample wire is polished, it needs to be wiped with cotton cloth to avoid the residue of debris. For re-inspection, after the sample processing is completed, the length and diameter of the sample are measured by a measuring tool to ensure that the length and diameter of all samples are within the standard error range to ensure the accuracy of the subsequent test data, where the standard error of the sample wire length is plus or minus 5% of the total length, and the standard error range of the sample wire diameter φ is φ≤2.5mm 2 The sample wire has a diameter error of ±0.1mm and a diameter of 2.5mm 2 <φ≤10mm 2 The diameter error of the sample wire is ±0.2mm, and the diameter is greater than φ>10mm 2 The diameter error of the sample wire is ±0.2mm; the anti-fatigue test includes swing angle adjustment and wire fatigue property test. During the sample wire test, the installation position of the round rod 4 on the disc 3 is adjusted according to the test needs of the sample wire, thereby realizing the swing angle adjustment of the swing mechanism 5, so as to better meet the actual test needs; the swing speed of the swing mechanism 5 is 10-60 times / min, and the speed of the motor 2 can be adjusted according to the actual test needs, thereby adjusting the swing speed of the swing mechanism 5; the fatigue property test of the wire includes the bending of the wire and the twisting of the wire. During the bending of the wire, the driving of the motor 2 The swing mechanism 5 can swing back and forth in an orderly manner, thereby driving the sample wire to swing, and cooperate with the positioning function of the positioning rod 101, so that the sample wire is bent when it contacts the positioning rod 101, and the anti-fatigue detection function of the sample wire can be achieved through the reciprocating bending of the sample wire, and the number of swings of the swing mechanism 5 is counted by a counter to determine the anti-fatigue characteristics of the sample wire; the twisting of the wire, during the sample wire detection process, when the wire is bent, the reciprocating twisting effect of the sample wire can be synchronously achieved in cooperation with the function of the rotating mechanism 6, and the anti-fatigue characteristics of the sample wire in the state of simultaneous bending and twisting can be detected through the twisting of the sample wire;

[0040] When testing copper alloy wire, Figure 1-Figure 4 As shown, during sampling, through the cutting, processing and re-inspection of samples, it is possible to ensure that the sample surface is smooth and the size of the sample meets the testing requirements. After the sample preparation is completed, the sample can be installed in the fatigue testing machine for testing.

[0041] The fatigue detection machine includes a shell 1, a motor 2, a disc 3, a round rod 4, a swing mechanism 5, a rotating mechanism 6 and a clamping mechanism 7. A positioning rod 101 is fixed to the front end surface of the shell 1, and a cross bar 102 is also fixed to the shell 1. The motor 2 is fixed in the shell 1, and a disc 3 is fixed to the output end of the motor 2, and a round rod 4 is fixed to the disc 3 by bolts. At the same time, the round rod 4 is connected to the swing mechanism 5 and the rotating mechanism 6. The swing mechanism 5 includes a swing frame 501, a fixed plate 502, a slide bar 503 and a spring 504. The swing frame 501 is connected to the shell 1 by a bearing, and the swing frame 501 and the round rod 4 are slidably connected, and a fixed plate 502 is fixed to the swing frame 501, and a slide bar 503 is slidably connected to the fixed plate 502, a spring 504 is fixed between the slide bar 503 and the fixed plate 502, and a clamping mechanism 7 is fixed to the lower end of the slide bar 503. 6 includes a movable frame 601, a convex toothed rod 602, a gear 603 and a rotating shaft 604, the movable frame 601 is slidably connected to the round rod 4, and the movable frame 601 is slidably connected to the cross bar 102, and the front end of the movable frame 601 is fixed with a convex toothed rod 602, and the convex toothed rod 602 is meshed with the gear 603, the gear 603 is fixed on the rotating shaft 604, and the rotating shaft 604 is connected to the front end surface of the housing 1 by a bearing, and the upper end of the rotating shaft 604 is fixed with a clamping mechanism 7; the clamping mechanism 7 includes a fixed frame 701, a bidirectional threaded rod 702, a clamping plate 703 and a guide rod 704, the upper bearing of the fixed frame 701 is connected with the bidirectional threaded rod 702, and the bidirectional threaded rod 702 is connected to the clamping plate 703 by a thread, and the clamping plate 703 is provided with a protective pattern, and the clamping plate 703 is slidably connected to the guide rod 704 fixed on the fixed frame 701;

[0042] When installing the prepared sample wire, Figure 5-Figure 8As shown, first, the upper end of the sample wire is placed between the two clamping plates 703 on the swing mechanism 5, and the bidirectional threaded rod 702 is rotated. Through the threaded connection between the bidirectional threaded rod 702 and the clamping plate 703, the clamping plate 703 is forced to move, and the sliding guiding effect between the clamping plate 703 and the guide rod 704 can ensure the stability of the movement of the clamping plate 703 until the two clamping plates 703 and the upper end of the sample wire are clamped and fixed, and then the sample wire is pulled to a straight state. At this time, the lower end of the sample wire is just located between the two clamping plates 703 on the rotating mechanism 6. According to the above principle, the clamping and fixation of the lower end of the sample wire is achieved, which ensures the stability of the sample wire installation, and the sample wire is just located between the two clamping plates 703 on the rotating mechanism 6. After the sample wire is installed, during the test, the swing angle of the swing mechanism 5 is adjusted according to the actual test needs, and the threaded holes at different positions on the round rod 4 and the disc 3 are fixed, so that the rotation diameter of the round rod 4 can be adjusted. Since the swing angle of the swing mechanism 5 is proportional to the rotation diameter of the round rod 4, the swing angle of the swing mechanism 5 can be adjusted. After the adjustment, during the test, the motor 2 is controlled to start, thereby driving the disc 3 and the round rod 4 to rotate. Through the sliding action between the round rod 4 and the swing frame 501, the swing frame 501 can be forced to swing left and right in an orderly manner, thereby driving the fixed plate 502 and the fixed plate 502 on The clamping plate 703 and the sample wire are swung, and when the sample wire swings and contacts the positioning rod 101, the contact position of the sample wire and the positioning rod 101 is bent. According to the above principle, the left and right bending effect of the sample wire can be realized. When the disc 3 and the round rod 4 rotate, the sliding effect between the round rod 4 and the movable frame 601 is cooperated, so that the movable frame 601 is forced to move left and right in an orderly manner. The sliding guide effect between the movable frame 601 and the cross bar 102 can ensure the stability of the movement of the movable frame 601. When the movable frame 601 moves left and right, the convex tooth rod 602 is synchronously driven to move left and right in an orderly manner. The meshing transmission effect between the convex tooth rod 602 and the gear 603 is cooperated, so that The rotating shaft 604, the clamping plate 703 on the rotating shaft 604 and the sample wire can rotate forward and backward in an orderly manner, so as to realize the twisting effect of the sample wire. In summary, when the sample wire is tested, the sample wire can be twisted and bent synchronously through the action of the swing frame 501 and the rotating mechanism 6, so that the test data is more in line with the actual use condition of the sample wire, and the accuracy of the test result is guaranteed. Until the sample wire breaks, the anti-fatigue property of the sample wire can be determined in conjunction with the counter. According to the above principle, multiple sample wires are tested, and the average value can be obtained to infer the anti-fatigue property of the overall copper alloy wire. This is the working principle of the fatigue property detection method of the copper alloy wire.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for detecting fatigue properties of a copper alloy wire, characterized in that: The following steps are involved: Step 1: Sample selection: randomly select 10-15 coils of copper alloy wire from the produced coils; Step 2: Sample preparation. After the sample selection is completed, each sample coil is processed according to the actual testing needs; Step 3: Clamping and fixing of the sample. After the sample preparation is completed, the two ends of the sample are fixed on the swing mechanism and the clamping mechanism respectively through the clamping mechanism, and the sample is kept in a straight state at this time; Step 4: Anti-fatigue test: After the sample is clamped and fixed, the fatigue test machine is started to perform anti-fatigue test on the sample. During the test, the number of bending times of the wire is counted by the counting device, and the camera can be used to detect whether the wire is broken, so that the signal can be fed back to the PLC controller to stop the device when the wire is broken; Step 5: Analyze the anti-fatigue characteristics of the samples based on the test data. After all samples are tested, the anti-fatigue performance of the wire can be determined by taking the average value based on the test data of the samples.

2. The method for detecting fatigue properties of a copper alloy wire according to claim 1, characterized in that: The preparation of the sample includes cutting, processing and re-inspection of the sample. For cutting the sample, 100 mm of each selected copper alloy wire coil is cut by a cutting machine, and one sample is cut from each copper alloy wire coil. When cutting the copper alloy wire coil, 50 mm to 100 mm is removed from the end of the copper alloy wire coil.

3. The fatigue property detection method of a copper alloy wire according to claim 2, characterized in that: The sample processing includes processing the surface of the sample wire by a mechanical grinding and polishing device after the sample length is cut, and wiping the sample wire with a cotton cloth after grinding and polishing.

4. The fatigue property detection method of a copper alloy wire according to claim 2, characterized in that: The sample re-inspection is to measure the length and diameter of the sample by measuring tools after the sample processing is completed, wherein the standard error of the sample wire length is plus or minus 5% of the total length, wherein the standard error range of the sample wire diameter φ is φ≤2.5mm 2 The sample wire has a diameter error of ±0.1mm and a diameter of 2.5mm 2 <φ≤10mm 2 The diameter error of the sample wire is ±0.2mm, and the diameter is greater than φ>10mm 2 The diameter error of the sample wire is ±0.2mm.

5. The method for detecting fatigue properties of a copper alloy wire according to claim 1, characterized in that: The anti-fatigue test includes swing angle adjustment and wire fatigue property test. During the test of the sample wire, the installation position of the round rod on the disc is adjusted according to the test requirements of the sample wire, thereby realizing the swing angle adjustment of the swing mechanism.

6. The method for detecting fatigue properties of a copper alloy wire according to claim 5, characterized in that: The swinging speed of the swinging mechanism is 10-60 times / min.

7. The method for detecting fatigue properties of a copper alloy wire according to claim 5, characterized in that: The fatigue property detection of the wire includes bending of the wire and twisting of the wire. During the bending of the wire, the swing mechanism is driven by a motor to swing back and forth in an orderly manner, thereby driving the sample wire to swing. In conjunction with the positioning function of the positioning rod, the sample wire is bent when in contact with the positioning rod. The reciprocating bending of the sample wire can realize the anti-fatigue detection of the sample wire, and the number of swings of the swing mechanism is counted by a counter to determine the anti-fatigue property of the sample wire.

8. The method for detecting fatigue properties of a copper alloy wire according to claim 5, characterized in that: The twisting of the wire, during the sample wire testing process, when the wire is bent, cooperates with the action of the rotating mechanism to synchronously realize the reciprocating twisting action of the sample wire. Through the twisting of the sample wire, the fatigue resistance of the sample wire in the simultaneous bending and twisting state is tested.

9. The fatigue property detection method of a copper alloy wire according to claim 1, characterized in that: The fatigue detection machine comprises a housing (1), a motor (2), a disc (3), a round rod (4), a swing mechanism (5), a rotating mechanism (6) and a clamping mechanism (7); a positioning rod (101) is fixed to the front end surface of the housing (1), and a cross rod (102) is also fixed to the housing (1); a motor (2) is fixed inside the housing (1), a disc (3) is fixed to the output end of the motor (2), and a round rod (4) is fixed to the disc (3) by bolts; the round rod (4) is connected to the swing mechanism (5) and the rotating mechanism (6) by bolts; the swing mechanism (5) comprises a swing frame (501), a fixed plate (502), a sliding rod (503) and a spring (504); the swing frame (501) is connected to the housing (1) by a bearing, and the swing frame (501) and the round rod (4) are slidably connected, and a fixed plate is fixed to the swing frame (501). (502), and a sliding rod (503) is slidably connected to the fixed plate (502), a spring (504) is fixed between the sliding rod (503) and the fixed plate (502), and a clamping mechanism (7) is fixed to the lower end of the sliding rod (503), and the rotating mechanism (6) comprises a movable frame (601), a convex tooth rod (602), a gear (603) and a rotating shaft (604), the movable frame (601) and the round rod (4) are slidably connected, and the movable frame (601) and the cross bar (102) are slidably connected, and a convex tooth rod (602) is fixed to the front end of the movable frame (601), and the convex tooth rod (602) is meshed with the gear (603), the gear (603) is fixed on the rotating shaft (604), and the rotating shaft (604) is bearing-connected to the front end surface of the housing (1), and a clamping mechanism (7) is fixed to the upper end of the rotating shaft (604).

10. The fatigue property detection method of a copper alloy wire according to claim 9, characterized in that: The clamping mechanism (7) comprises a fixing frame (701), a bidirectional threaded rod (702), a clamping plate (703) and a guide rod (704); the fixing frame (701) is connected to a bidirectional threaded rod (702) by a bearing, the bidirectional threaded rod (702) is connected to the clamping plate (703) by threads, and the clamping plate (703) is provided with a protective pattern, and the clamping plate (703) and the guide rod (704) fixed on the fixing frame (701) are slidably connected.

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