Method for stress detection of a copper alloy wire

Abstract

The application discloses a stress detection method for copper alloy wire, and relates to the technical field of copper alloy wire detection, which comprises the following steps: test preparation; sample clamping; test; stress calculation; strain calculation; and stress-strain diagram drawing. The stress detection method for copper alloy wire is provided with a rotating seat and a limiting column. When the wire is clamped and fixed, the rotating seat is rotated, the end of the wire is automatically wound, the clamping area is expanded, and the wire is prevented from falling off. Meanwhile, the clamping parts of the movable clamping plate, the rotating seat, the rotating clamping block and the fixed clamping plate are all provided with clamping gaskets, so that the friction during clamping is improved. In addition, the surface of the sample is cleaned in advance, so that slipping or stress concentration during clamping is avoided. The end of the wire is located in the V-shaped groove on the side of the fixed clamping plate, so that the wire is conveniently centered and aligned, and the wire is prevented from being skewed due to the inconsistent height of the two ends.

Description

Technical Field

[0001] This invention relates to the field of copper alloy wire testing technology, specifically a stress testing method for copper alloy wire. Background Technology

[0002] Copper alloy wire is a material used in construction and industrial production. It has high strength and hardness, good electrical and thermal conductivity, wear resistance and friction reduction. Stress is the resistance per unit area generated inside the material under the action of external force. External force includes externally applied force, force generated by uneven heating or permanent deformation. When producing copper alloy wire, it is necessary to test the ultimate stress that the copper alloy wire can withstand.

[0003] Currently, when testing the stress of copper alloy wires, a tensile testing machine is usually used to stretch the wire. However, the wire will also deform and elongate during stretching. At this time, it is not convenient to measure the relationship between strain and stress, so the understanding of the internal mechanical behavior of the wire is not good, and it is not convenient to analyze and predict the performance of the material under different load conditions.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed a stress detection method for copper alloy wire. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a stress detection method for copper alloy wires, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stress detection method for copper alloy wire, the stress detection method for copper alloy wire comprising the following steps:

[0007] Step 1: Preparation for the test. Select multiple copper alloy wires as samples, treat the sample surface to remove oil and oxide layer, measure the sample size, and calibrate the tensile testing machine.

[0008] Step 2: Sample clamping. Place both ends of the sample into the clamping assemblies on both sides of the tensile testing machine, then lock and fix them, leaving the middle of the sample in a relaxed state.

[0009] Step 3: Conduct the test. Start the tensile testing machine to perform a tensile test on the sample. During this process, the tensile sensor can monitor the applied tensile force in real time and detect the tensile force F on the sample. The indicator block can detect the effective tensile area of ​​the sample and measure its length L. At the same time, the measuring belt will measure the change in the sample's length ΔL. Therefore, during the measurement process, record the value of ΔL under different applied tensile forces F until the sample reaches its ultimate stress and breaks. Then replace the sample and test again.

[0010] Step 4: Stress calculation. After the test, based on the previously recorded data, use... The stress of the sample under different tensile forces can be calculated, and the ultimate stress that the sample can withstand can be calculated using the tensile force applied when the sample breaks.

[0011] Step 5: Strain calculation, based on previously recorded data, using... Calculate the strain of the sample under different tensile forces;

[0012] Step 6: Draw a stress-strain diagram. Plot the stress-strain diagram of the sample with stress as the vertical axis and strain as the horizontal axis. This allows for easy observation of the sample's proportional limit, elastic limit, yield point, ultimate stress point, and fracture point based on the change in curvature, thus enabling a thorough analysis of the sample.

[0013] Furthermore, in step one, when selecting samples, it is necessary to check whether there are obvious scratches or defects on the sample surface to avoid excessive flaws on the sample surface affecting the test results.

[0014] Furthermore, in step one, the measurement of the sample includes measuring its initial diameter, and it is also necessary to make different marks on each sample to facilitate the staff to distinguish between multiple samples and avoid errors in subsequent recording.

[0015] Furthermore, in step two, it is ensured that both ends of the sample extend from the middle of the clamping components at both ends of the press, so that the sample remains straight during subsequent stretching, avoiding uneven force distribution during the test due to sample tilting, which would affect the accuracy of the experiment.

[0016] Furthermore, in step three, by increasing the tension of the tensile testing machine at different stages, it is easier for staff to record the changes in sample length under different tension conditions.

[0017] Furthermore, in step three, after testing a single sample, the press needs to be reset and recalibrated to avoid affecting the accuracy of subsequent tests on other samples.

[0018] Furthermore, in step four, σ is stress, F is the external force acting on the material, i.e., the tensile force applied by the tensile testing machine, and A is the area of ​​force application, i.e., the cross-sectional area of ​​the sample, which is equal to the diameter of the sample.

[0019] Furthermore, in step five, ε is strain, ΔL is the change in the length of the material, and L is the original stretchable length of the material.

[0020] Furthermore, the tensile testing machine includes a frame, a hydraulic cylinder, a tensile sensor, a drive plate, a drive seat, a clamping assembly, and a measuring assembly. A hydraulic cylinder is mounted on one side of the frame, and a tensile sensor is connected to the end of the hydraulic cylinder. A drive plate is mounted on the end of the tensile sensor, and a drive seat is mounted on one side of the drive plate. Clamping assemblies are mounted on one side of the drive seat and at one end of the frame, and a measuring assembly is mounted at one end of the drive seat. The clamping assembly includes a support plate, a screw, a movable clamping plate, a rotating seat, a limiting post, a spring, and a limiting rod. The device includes a rotating clamping block and a fixed clamping plate. A support plate is installed on one side of the drive seat and one end of the frame. A screw is threaded inside the support plate. A movable clamping plate is rotatably connected to the end of the screw. A rotating seat is slidably connected inside one end of the movable clamping plate. A limit post is slidably connected inside the rotating seat and is fixedly connected to the support plate. A spring is provided on the outside of the rotating seat, and a limit rod is fixed on one side of the rotating seat. A rotating clamping block is slidably connected to the outside of the limit rod, and a fixed clamping plate is rotatably connected to the outside of the rotating clamping block.

[0021] Furthermore, the measuring assembly includes a connecting frame, an anti-slip plate, a take-up shaft, a measuring belt, an indicator block, and a scale. The connecting frame is fixed to the other side of the drive base, and an anti-slip plate is installed at one end of the drive base. A take-up shaft is slidably connected to one side of the anti-slip plate, and a measuring belt is wound around the outer side of the middle part of the take-up shaft. An indicator block is fixed to the end of the measuring belt, and the indicator block is slidably connected to the frame. A scale is provided at one end of the top of the frame.

[0022] This invention provides a method for stress detection of copper alloy wire, which has the following beneficial effects:

[0023] 1. The stress detection method for this copper alloy wire involves setting a rotating seat and limiting posts. During the clamping and fixing of the wire, the rotating seat rotates, automatically winding the end of the wire to expand the clamping area and prevent it from falling off. At the same time, the clamping parts of the movable clamping plate, rotating seat, rotating clamping block, and fixed clamping plate are all equipped with clamping pads to improve the friction during clamping. Furthermore, the surface of the sample is cleaned in advance to prevent slippage or stress concentration during clamping. The end of the wire is located in the V-shaped groove on the side of the fixed clamping plate, which facilitates the centering and alignment of the wire and prevents skewing caused by uneven height at both ends of the wire.

[0024] 2. The stress detection method for this copper alloy wire involves setting up a measuring belt and an indicator block. When the wire is slack, the measuring belt pulls the indicator block, causing it to slide on the frame. When the wire is taut, the drive seat stops moving due to the tension of the wire, and the drive plate slides outside the connecting frame. Simultaneously, it moves the anti-slip plate out of the drive seat. When the drive plate is in contact with the middle of the connecting frame, rigid transmission occurs between the drive plate and the connecting frame. At this time, the tension sensor can measure the tension on the sample. When the anti-slip plate moves out of the drive seat, it separates from the winding shaft, and the indicator block stops moving due to friction, thus positioning one end of the measuring belt. The initial deformable length of the sample is quickly recorded based on the indicator block and the scale. When the drive seat moves and causes the sample to deform, the measuring belt extends, facilitating the observation of the deformed length of the sample. Attached Figure Description

[0025] Figure 1 This is a schematic flowchart of a stress detection method for copper alloy wire according to the present invention.

[0026] Figure 2 This is a frontal three-dimensional structural diagram of a tensile testing machine for a stress detection method for copper alloy wire according to the present invention.

[0027] Figure 3 This is a three-dimensional structural diagram of the clamping assembly for a stress detection method for copper alloy wire according to the present invention.

[0028] Figure 4 This is an exploded structural diagram of the clamping assembly of the stress detection method for copper alloy wire according to the present invention.

[0029] Figure 5 This is a three-dimensional structural diagram of the measuring component of the stress detection method for copper alloy wire according to the present invention.

[0030] Figure 6 This invention relates to a stress detection method for copper alloy wires. Figure 2 Enlarged structural diagram at point A in the middle.

[0031] In the diagram: 1. Frame; 2. Hydraulic cylinder; 3. Tension sensor; 4. Drive plate; 5. Drive base; 6. Clamping assembly; 601. Support plate; 602. Screw; 603. Movable clamping plate; 604. Rotating base; 605. Limiting post; 606. Spring; 607. Limiting rod; 608. Rotating clamping block; 609. Fixed clamping plate; 7. Measuring assembly; 701. Connecting frame; 702. Anti-slip plate; 703. Rewinding shaft; 704. Measuring belt; 705. Indicator block; 706. Ruler. Detailed Implementation

[0032] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0033] like Figures 1-6 As shown, the present invention provides a technical solution: a stress detection method for copper alloy wires, the stress detection method for copper alloy wires comprising the following steps:

[0034] Step 1: Test preparation. Select multiple copper alloy wires as samples. When selecting samples, check for obvious scratches or defects on the sample surface to avoid excessive flaws that could affect the test results. Treat the sample surface to remove oil and oxide layers. Measure the sample dimensions, including the initial diameter. Mark each sample differently to facilitate identification and prevent errors in subsequent recording. Calibrate the tensile testing machine.

[0035] Step 2: Sample clamping. Place both ends of the sample into the clamping components 6 on both sides of the tensile testing machine, and then lock and fix them to ensure that both ends of the sample extend from the middle of the clamping components 6 on both sides of the press. This will ensure that the sample remains straight during subsequent stretching, avoid uneven force during the test caused by sample tilting, which would affect the experimental accuracy, and make the middle of the sample relaxed.

[0036] Step 3: Conduct the test. Start the tensile testing machine to perform a tensile test on the sample. During this process, the tensile sensor 3 can monitor the applied tensile force in real time and detect the tensile force F on the sample. The indicator block 705 can detect the effective tensile area of ​​the sample and measure its length L. At the same time, the measuring belt 704 will measure the change in the sample length as ΔL. Therefore, during the measurement process, the value of ΔL under different applied tensile forces F is recorded. At the same time, by increasing the tensile force of the tensile testing machine in stages, it is convenient for the staff to record the change in the sample length under different tensile forces until the sample reaches the limit stress it can withstand and breaks. Then, a new sample is replaced for testing. After testing a single sample, the press needs to be reset and recalibrated to avoid affecting the accuracy of subsequent tests on other samples.

[0037] Step 4: Stress calculation. After the test, based on the previously recorded data, use... The stress of the sample under different tensile forces is calculated, where σ is the stress, F is the external force acting on the material, which is the tensile force applied by the tensile testing machine, and A is the area of ​​force application, which is the cross-sectional area of ​​the sample, and is equal to the diameter of the sample. Therefore, the ultimate stress that the sample can withstand can be calculated by using the tensile force applied when the sample breaks.

[0038] Step 5: Strain calculation, based on previously recorded data, using... Calculate the strain of the sample under different tensile conditions, where ε is the strain, ΔL is the change in length of the material, and L is the original tensile length of the material;

[0039] Step 6: Draw a stress-strain diagram. Plot the stress-strain diagram of the sample with stress as the vertical axis and strain as the horizontal axis. This allows for easy observation of the sample's proportional limit, elastic limit, yield point, ultimate stress point, and fracture point based on the change in curvature, thus enabling a thorough analysis of the sample.

[0040] like Figures 2-6 As shown, the tensile testing machine includes a frame 1, a hydraulic cylinder 2, a tension sensor 3, a drive plate 4, a drive base 5, a clamping assembly 6, and a measuring assembly 7. A hydraulic cylinder 2 is mounted on one side of the frame 1, and a tension sensor 3 is connected to the end of the hydraulic cylinder 2. A drive plate 4 is mounted on the end of the tension sensor 3, and a drive base 5 is mounted on one side of the drive plate 4. Clamping assemblies 6 are mounted on one side of the drive base 5 and one end of the frame 1, and a measuring assembly 7 is mounted on one end of the drive base 5. Component 6 includes a support plate 601, a screw 602, a movable clamping plate 603, a rotating seat 604, a limiting post 605, a spring 606, a limiting rod 607, a rotating clamping block 608, and a fixed clamping plate 609. Support plates 601 are mounted on one side of the drive seat 5 and one end of the frame 1. The screw 602 is threadedly connected to the inside of the support plate 601. The movable clamping plate 603 is rotatably connected to the end of the screw 602, and the rotating seat 609 is slidably connected to one end of the movable clamping plate 603. 04. A limiting post 605 is slidably connected inside the rotating seat 604, and the limiting post 605 is fixedly connected to the support plate 601. A spring 606 is provided on the outside of the rotating seat 604, and a limiting rod 607 is fixed on one side of the rotating seat 604. A rotating clamping block 608 is slidably connected to the outside of the limiting rod 607, and a fixed clamping plate 609 is rotatably connected to the outside of the rotating clamping block 608. The measuring assembly 7 includes a connecting frame 701, an anti-slip plate 702, and a winding shaft 703. The measuring belt 704, the indicator block 705, and the scale 706 are provided. A connecting frame 701 is fixed on the other side of the drive base 5, and an anti-slip plate 702 is installed at one end of the drive base 5. A winding shaft 703 is slidably connected to one side of the anti-slip plate 702, and the measuring belt 704 is wound around the outer side of the middle part of the winding shaft 703. An indicator block 705 is fixed to the end of the measuring belt 704, and the indicator block 705 is slidably connected to the frame 1. A scale 706 is provided at one end of the top of the frame 1.

[0041] The specific operation is as follows: First, insert one end of the sample between the rotating seat 604 and the rotating clamping block 608, and position it between the two limiting rods 607. At this time, when the rotating screw 602 drives the movable clamping plate 603 to move, the spring 606 can squeeze the rotating seat 604, thus pressing the end of the sample onto the rotating clamping block 608. At the same time, since the rotating seat 604 slides outside the limiting post 605, and the rotating seat 604 has a spiral guide groove inside, the rotating seat 604 will rotate under the limitation of the protrusion at the end of the limiting post 605. Thus, during the clamping process, the end of the wire is automatically wound, increasing the clamping area and preventing it from falling off. At the same time, when the movable clamping plate 603 and the fixed clamping plate 609 are aligned... When clamping the wire, the movable clamping plate 603 will also fit against the stepped part in the middle of the rotating seat 604, enabling rigid transmission and preventing loosening due to the vibration of the spring 606. Simultaneously, the clamping parts of the movable clamping plate 603, rotating seat 604, rotating clamping block 608, and fixed clamping plate 609 are all equipped with clamping pads to increase friction during clamping. Furthermore, the end of the wire will be located in the V-groove on the side of the fixed clamping plate 609, facilitating centered alignment of the wire and preventing skewing due to uneven height at both ends, which could lead to uneven force and affect detection accuracy. Before starting the equipment, rotate the take-up shaft 703 to pull the indicator block 705 against the drive seat 5 using the measuring belt 704, then push the drive seat 5 to align it with the drive plate. 4. During the bonding process, the anti-slip plate 702 is inserted into the through hole at one end of the drive seat 5. Then, the hydraulic cylinder 2 is activated to move the drive plate 4. At this time, there is frictional resistance between the drive plate 4 and the connecting frame 701, which drives the drive seat 5 to move synchronously, so that the wire changes from a slack state to a straight state. At the same time, since the anti-slip plate 702 is in close contact with the side of the take-up shaft 703, the frictional force can be used to limit the rotation of the take-up shaft 703. Therefore, when the drive seat 5 moves, it will pull the indicator block 705 through the measuring belt 704, causing it to slide on the frame 1. When the wire is taut, the position of the drive seat 5 will be pulled by the wire and stop moving. The drive plate 4 will then slide outside the connecting frame 701, and at the same time, it will drive the anti-slip plate 702 from the drive seat 701. When the drive plate 4 moves out of the drive seat 5 and is in contact with the middle of the connecting frame 701, the drive plate 4 will rigidly transmit power between the connecting frame 701 and the drive plate 4. At this time, the tension sensor 3 can measure the tension on the sample. When the anti-slip plate 702 moves out of the drive seat 5, the anti-slip plate 702 will separate from the winding shaft 703. Since the indicator block 705 will stop moving under the action of friction and gravity, it will position one end of the measuring belt 704. Therefore, when the sample deforms and the drive seat 5 moves, the measuring belt 704 can be extended to facilitate the observation of the deformation length of the sample. At the same time, the indicator block 705 stops moving when the sample is taut, so the initial deformable length of the sample can be quickly recorded according to the scale 706.

[0042] In summary, the stress testing method for this copper alloy wire involves first selecting multiple copper alloy wires with no obvious surface defects as samples, removing oil and oxide layers from the sample surfaces, measuring the initial diameter of the samples, and marking each sample differently. The tensile testing machine is then calibrated. Next, both ends of the sample are placed in the clamping components 6 on both sides of the tensile testing machine and locked in place. During clamping, the wire ends are automatically wound to increase the clamping area and prevent detachment. Simultaneously, the V-groove on the side of the fixing plate 609 facilitates centering and alignment of the wire, ensuring that both ends of the sample extend from the middle of the clamping components 6 at both ends of the press. This ensures that the sample remains straight during tensile testing, preventing uneven stress due to sample tilting, which could affect the test results. To verify the accuracy, the tensile testing machine is then started to perform a tensile test on the sample. During this process, the tensile sensor 3 detects the tensile force F applied to the sample, while the indicator block 705 stops moving when the wire is straight. The effective tensile length L of the sample can then be measured according to the scale 706. Simultaneously, the measuring belt 704 measures the change in sample length ΔL. Therefore, during the measurement process, the value of ΔL under different applied tensile forces F is recorded. The tensile force of the machine is gradually increased to facilitate the recording of the sample length change under different tensile forces, until the sample reaches its ultimate stress and breaks. After testing a single sample, the press needs to be reset and recalibrated to avoid affecting the accuracy of subsequent sample testing. Then, using... The stress of the sample under different tensile forces is calculated, where σ is the stress, F is the tensile force applied by the tensile testing machine, and A is the diameter of the sample. Therefore, the ultimate stress that the sample can withstand can be calculated using the tensile force applied when the sample breaks. The strain of the sample under different tensile conditions is calculated, where ε is the strain, ΔL can be obtained through the measuring band 704, and L can be obtained through the indicator block 705 and the scale 706. Finally, the stress-strain diagram of the sample is plotted with stress as the vertical axis and strain as the horizontal axis. Therefore, the proportional limit, elastic limit, yield point, ultimate stress point and fracture point of the sample can be easily observed and analyzed based on the change in curvature.

[0043] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A method for stress detection of copper alloy wire, characterized in that: The stress detection method for the copper alloy wire includes the following steps: Step 1: Preparation for the test. Select multiple copper alloy wires as samples, treat the sample surface to remove oil and oxide layer, measure the sample size, and calibrate the tensile testing machine. Step 2: Sample clamping. Place both ends of the sample into the clamping assemblies on both sides of the tensile testing machine, then lock and fix them, leaving the middle of the sample in a relaxed state. Step 3: Conduct the test. Start the tensile testing machine to perform a tensile test on the sample. During this process, the tensile sensor monitors the applied tensile force in real time and detects the tensile force F on the sample. The indicator block detects the effective tensile area of ​​the sample and measures its length L. At the same time, the measuring belt measures the change in the sample's length as ΔL. Therefore, during the measurement process, record the value of ΔL under different applied tensile forces F until the sample reaches its ultimate stress and breaks. Then replace the sample for testing. Step 4: Stress calculation. After the test, based on the previously recorded data, use... The stress of the sample under different tensile forces is calculated. Therefore, the ultimate stress that the sample can withstand can be calculated using the tensile force applied when the sample breaks. A is the area of ​​force application, which is the cross-sectional area of ​​the sample. Step 5: Strain calculation, based on previously recorded data, using... Calculate the strain of the sample under different tensile forces; Step 6: Draw a stress-strain diagram. Plot the stress-strain diagram of the sample with stress as the vertical axis and strain as the horizontal axis. This allows for easy observation of the sample's proportional limit, elastic limit, yield point, ultimate stress point, and fracture point based on the change in curvature, thus enabling a thorough analysis of the sample. The tensile testing machine includes a frame (1), a hydraulic cylinder (2), a tensile sensor (3), a drive plate (4), a drive seat (5), a clamping assembly (6), and a measuring assembly (7). A hydraulic cylinder (2) is located on one side of the frame (1), and a tensile sensor (3) is connected to the end of the hydraulic cylinder (2). A drive plate (4) is mounted on the end of the tensile sensor (3), and a drive seat (5) is located on one side of the drive plate (4). A clamping assembly (6) is mounted on one side of the drive seat (5) and at one end of the frame (1), and a measuring assembly (7) is located at one end of the drive seat (5). The clamping assembly (6) includes a support plate (601), a screw (602), a movable clamping plate (603), a rotating seat (604), a limiting post (605), a spring (606), a limiting rod (607), and a rotating clamping block (608). The drive seat (5) and the fixed clamping plate (609) are provided with a support plate (601) on one side and one end of the frame (1). The support plate (601) is threaded with a screw (602) inside. The end of the screw (602) is rotatably connected to a movable clamping plate (603). The movable clamping plate (603) is slidably connected to a rotating seat (604) inside. The rotating seat (604) is slidably connected to a limit post (605) inside. The limit post (605) is fixedly connected to the support plate (601). A spring (606) is provided on the outside of the rotating seat (604). A limit rod (607) is fixed on one side of the rotating seat (604). A rotating clamping block (608) is slidably connected to the outside of the limit rod (607). The fixed clamping plate (609) is rotatably connected to the outside of the rotating clamping block (608). The measuring component (7) includes a connecting frame (701), an anti-slip plate (702), a take-up shaft (703), a measuring belt (704), an indicator block (705), and a scale (706). The connecting frame (701) is fixed on the other side of the drive seat (5), and an anti-slip plate (702) is placed on one end of the drive plate (4). The take-up shaft (703) is slidably connected to one side of the anti-slip plate (702), and the measuring belt (704) is wound around the outer side of the middle part of the take-up shaft (703). An indicator block (705) is fixed to the end of the measuring belt (704), and the indicator block (705) is slidably connected to the frame (1). A scale (706) is provided at one end of the top of the frame (1). In use, first insert one end of the sample into the middle of the rotating seat (604) and the rotating clamp (608), and place it between the two limiting rods (607). When the rotating screw (602) drives the movable clamp (603) to move, the spring (606) can squeeze the rotating seat (604), thus pressing the end of the sample onto the rotating clamp (608). At the same time, since the rotating seat (604) will slide outside the limiting post (605), and the rotating seat (604) has a spiral guide groove inside, the rotating seat (604) will rotate under the limiting of the protrusion at the end of the limiting post (605). Thus, during the clamping process, the end of the wire is automatically wound to expand the clamping area and prevent it from falling off. Before starting the equipment, rotate the take-up shaft (703) to pull the indicator block (705) and make it fit against the drive seat (5) with the measuring belt (704). Then push the drive seat (5) to fit against the drive plate (4). At this time, the anti-slip plate (702) will be inserted into the through hole at one end of the drive seat (5). Then start the hydraulic cylinder (2) to drive the drive plate (4) to move. At this time, there is frictional resistance between the drive plate (4) and the connecting frame (701), which can drive the drive seat (5) to move. The drive plate (5) moves synchronously to straighten the wire from a slack state. Simultaneously, because the anti-slip plate (702) is in close contact with the side of the take-up shaft (703), the frictional force restricts the rotation of the take-up shaft (703). Therefore, when the drive plate (5) moves, it pulls the indicator block (705) via the measuring belt (704), causing it to slide on the frame (1). When the wire is taut, the drive plate (5) stops moving due to the tension of the wire. (4) It will slide outside the connecting frame (701), and at the same time, it will drive the anti-slip plate (702) to move out of the drive seat (5). When the drive plate (4) is in contact with the limiting protrusion in the middle of the connecting frame (701), the drive plate (4) will perform rigid transmission with the connecting frame (701). At this time, the tensile force on the sample can be measured by the tension sensor (3). When the anti-slip plate (702) moves out of the drive seat (5), the anti-slip plate (702) will slide outside the connecting frame (701), and at the same time, it will drive the anti-slip plate (702) to move out of the drive seat (5). Separated from the winding shaft (703), and since the indicator block (705) stops moving under the action of friction and gravity, it will position one end of the measuring belt (704). Therefore, when the sample deforms and the drive seat (5) moves, the measuring belt (704) can be extended to facilitate the observation of the deformation length of the sample. At the same time, the indicator block (705) stops moving when the sample is taut, so the initial length of the sample that can be deformed can be quickly recorded according to the scale (706).

2. The stress detection method for copper alloy wire according to claim 1, characterized in that: In step one, when selecting a sample, it is necessary to check whether there are obvious scratches or defects on the sample surface.

3. The stress detection method for copper alloy wire according to claim 1, characterized in that: In step one, the measurement of the sample includes measuring its initial diameter, and it is also necessary to make different markings between the individual samples.

4. The stress detection method for copper alloy wire according to claim 1, characterized in that: In step two, ensure that both ends of the sample extend from the middle of the clamping components at both ends of the press.

5. The stress detection method for copper alloy wire according to claim 1, characterized in that: In step three, the tension of the tensile testing machine is increased in stages.

6. The stress detection method for copper alloy wire according to claim 1, characterized in that: In step three, after testing a single sample, the press needs to be reset and recalibrated.

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