Low-oxygen copper wire elongation tension test equipment and method

Abstract

The invention relates to the technical field of copper wire elongation testing, in particular to low-oxygen copper wire elongation tension testing equipment and method, and the equipment comprises a stretching module which comprises a stretching moving part and a stretching fixed part which are oppositely arranged; the stretching moving piece does linear motion; clamping assemblies are arranged on the stretching movable piece and the stretching fixed piece to clamp a copper wire; the transmission module comprises an input shaft, an output screw rod, a first transmission group and a transition shaft; the stretching moving part is in transmission connection with the output screw rod; the transition shaft and the input shaft are oppositely arranged; the input shaft is sleeved with the first transmission set. The first transmission group is in transmission connection with the output screw rod; the transition shaft is in transmission connection with the output screw rod; the switching module comprises a first switching gear set connected with the first transmission set and the input shaft, and a second switching gear set connected with the input shaft and the transition shaft; the switching module switches the working state of the equipment; the detection module is connected with the stretching fixing piece to detect tension; the driving module drives the input shaft to rotate. The working efficiency is effectively improved, and the test error is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of copper wire elongation testing, and in particular to a low-oxygen copper wire elongation tensile testing device and method. Background Art

[0002] Low-oxygen copper wire is widely used in power transmission, electronic appliances and communications due to its excellent conductivity, ductility and corrosion resistance. In practical applications, the mechanical properties of low-oxygen copper wire, such as tensile strength and elongation, are directly related to its reliability under complex working conditions; therefore, accurately measuring the elongation and tensile performance of low-oxygen copper wire is an important part of evaluating its quality and optimizing the production process; currently, tensile test equipment is commonly used in this field, and its core function is to apply gradual tension to the copper wire until it breaks, while recording the tension value and stretched length to calculate the elongation.

[0003] During the measurement process, traditional equipment starts measuring when the copper wire is not fully straightened but is straightened by naked eye; or, measurement starts when the sensor starts to show readings, but in the process of the equipment straightening the copper wire, force needs to be applied to the copper wire to straighten it. Even if the sensor shows readings, the copper wire may not have reached the stretched state at this time, which will cause a certain deviation between the recorded data and the actual data. The thicker the copper wire, the greater the deviation. Therefore, the data obtained by traditional equipment during the measurement process has a large error, which affects the accuracy of the elongation.

[0004] Therefore, there is an urgent need for a low-oxygen copper wire elongation tensile test device and method, which can reduce the error caused by the copper wire not being straightened and effectively improve work efficiency and measurement accuracy. Summary of the invention

[0005] The present invention provides a low-oxygen copper wire elongation tensile test device and method, which can effectively reduce the error in elongation calculation caused by measurement when the copper wire is not straightened, and effectively improve work efficiency.

[0006] The present invention provides a low-oxygen copper wire elongation tensile test device, comprising: The stretching module comprises a stretching movable member and a stretching fixed member which are relatively arranged; the stretching fixed member is fixed on a workbench; the stretching movable member moves linearly toward or away from the stretching fixed member on the workbench; clamping components are arranged on the stretching movable member and the stretching fixed member for clamping the copper wire; The transmission module comprises an input shaft, an output screw rod, a first transmission group and a transition shaft; the output screw rod is rotatably arranged on a workbench, and the stretching movable member is transmission-connected with the output screw rod; the first transmission group is sleeved on the input shaft; the transition shaft is arranged at one end of the input shaft; the first transmission group is transmission-connected with the output screw rod, and drives the output screw rod to rotate continuously; the transition shaft is transmission-connected with the output screw rod, and drives the output screw rod to rotate intermittently; The switching module is arranged on the workbench; the switching module comprises a first switching gear set and a second switching gear set; in the first working state of the device, the first switching gear set is transmission-connected to the first transmission set and the input shaft; in the second working state of the device, the second switching gear set is transmission-connected to the input shaft and the transition shaft; A detection module, connected to the clamping assembly, for detecting the pulling force; The driving module is used to drive the input shaft to rotate.

[0007] Furthermore, the clamping assembly includes a first clamping member arranged on the stretching fixed member; the first clamping member is slidably connected to the stretching fixed member, and a clamping plate is arranged at one end of the first clamping member away from the stretching movable member; the detection module is arranged between the clamping plate and the stretching fixed member.

[0008] Furthermore, the transition shaft is provided with an output gear, and the output gear rotates along with the transition shaft; the output gear has only one section of teeth, and the output gear is drivingly connected with the output screw rod.

[0009] Furthermore, the transmission module includes a second transmission group and a third transmission group; the second transmission group contains a first gear and a second gear that are meshed; the first gear is sleeved on the output screw; the second gear is connected to the first transmission group; the third transmission group contains a third gear and a fourth gear that are meshed; the third gear is meshed with the output gear; the fourth gear is sleeved on the output screw.

[0010] Furthermore, the first transmission group includes a fifth gear and a sixth gear, and the fifth gear and the sixth gear rotate synchronously; the fifth gear is meshed with the second gear, and the sixth gear is connected to the first switching gear group; when the first switching gear group transmits to the input shaft, the first transmission group rotates.

[0011] Furthermore, it includes a fixing assembly, which is arranged on one side of the output screw rod and is used to fix the switching module.

[0012] Furthermore, the switching module includes a switching component, which includes a fixed rod fixedly connected to the fixed component; the switching component rotates around the axis of the fixed rod, and when switching between two working states of the device, it drives the first switching gear group or the second switching gear group to connect with the input shaft to participate in the transmission work.

[0013] Furthermore, the fixing component is provided with a guide groove; the switching component is provided with a guide rod, the guide rod extends into the guide groove, slides in the guide groove, and drives the switching component to rotate; when the guide rod is at both ends of the guide groove, the device is in two working states respectively.

[0014] Furthermore, the guide rod is rotatably arranged on the switching assembly; the switching assembly includes a switching rod, one end of which is rotatably arranged on the workbench and the other end is fixedly connected to the guide rod; the switching rod is used to push the guide rod to slide in the guide groove.

[0015] The present invention also provides a low-oxygen copper wire elongation tensile test method, which is used in the above-mentioned low-oxygen copper wire elongation tensile test equipment and comprises the following steps: S10: clamp the copper wire on the clamping assembly; the switching module is actuated to make the second switching gear set drive and connect the input shaft and the transition shaft; the detection module detects the tension of the copper wire pulled by the clamping assembly in real time and displays the tension indication; S20: The driving module drives the input shaft to rotate, and the power of the input shaft is transmitted to the output screw rod through the second switching gear set, the transition shaft, and the third transmission set; S30: The output screw rod rotates intermittently, driving the stretching moving part to move intermittently, and obtaining the detection module reading during the movement interval. If the detection module reading is greater than the set value, enter S40; S40: The switching module is actuated, so that the first switching gear group is connected to the input shaft and the first transmission group; at this time, the power of the input shaft is transmitted to the output screw rod through the first switching gear group, the first transmission group, and the second transmission group; until the copper wire is broken, the driving module stops working; S50: Record the position of the stretching movable member at the beginning of S40, the position of the stretching movable member at the end of S40 and the indication of the detection module at the end of S40, and calculate the elongation.

[0016] The beneficial effects of the present invention are as follows: by converting the tension during the stretching of the copper wire into the detection pressure, the detection method is more convenient and the data is more accurate; the switching of the two transmission paths is realized by a switching module, which is coordinated with the two working states during the equipment test, thereby avoiding the limitation of a single transmission path during traditional testing; through the transmission coordination of multiple gear sets, after the equipment is started, the output screw rod avoids reverse rotation or even stops working, thereby improving the working efficiency of the equipment, reducing the capacity loss, and making the tensile test more stable and smooth; at the beginning of the test, the copper wire is intermittently stretched until the tension indication continues to increase, thereby reducing the influence of the copper wire being measured before it is straightened on the calculation of the stretch rate during manual observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the low-oxygen copper wire elongation tensile test equipment of the present invention; Figure 2 It is a structural schematic diagram of a stretching module in a low-oxygen copper wire elongation tensile test device of the present invention; Figure 3 It is a structural schematic diagram of a transmission module and a switching module in the low-oxygen copper wire elongation tensile test equipment of the present invention; Figure 4 It is a structural schematic diagram of a transmission module in the low-oxygen copper wire elongation tensile test equipment of the present invention; Figure 5 It is a structural schematic diagram of a switching module and a fixing component in the low-oxygen copper wire elongation tensile test equipment of the present invention; 1. Stretch module; 11. Slide rail; 12. Stretch movable member; 13. Stretch fixed member; 14. Clamping assembly; 14a. First clamping member; 14a1. Clamping plate; 14b. Second clamping member; 2. Transmission module; 21. Input shaft; 22. Output screw rod; 23. First transmission group; 23a. Fifth gear; 23b. Sixth gear; 24. Transition shaft; 24a. Output gear; 25. Second transmission group; 25a. First gear; 25b. Second gear; 26. Third transmission group; 26a. Third gear; 26b. Fourth gear; 3. Switching module; 31. First switching gear group; 32. Second switching gear group; 33. Switching assembly; 33a. Fixed rod; 33b. Guide rod; 33c. Switching rod; 4. Detection module; 5. Driving module; 6. Fixed assembly; 61. Guide groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] A low oxygen copper wire elongation tensile test equipment, such as Figures 1 to 5 As shown, it includes a stretching module 1, a transmission module 2, a switching module 3, a detection module 4 and a driving module 5. The following is the specific structure of each component: The stretching module 1 comprises a slide rail 11 fixed on a workbench, a stretching movable member 12 and a stretching fixed member 13 arranged opposite to each other; the stretching fixed member 13 is fixed on the workbench; the stretching movable member 12 is arranged on the slide rail 11, and moves linearly in a direction approaching or moving away from the stretching fixed member 13; clamping components are arranged on both the stretching movable member 12 and the stretching fixed member 13 for clamping the copper wire.

[0023] The transmission module 2 includes an input shaft 21, an output screw rod 22, a first transmission group 23 and a transition shaft 24; the output screw rod 22 is rotatably arranged on the workbench, and the stretching movable member 12 is transmission-connected with the output screw rod 22 to form a screw slider structure; the first transmission group 23 is sleeved on the input shaft 21; the transition shaft 24 is arranged opposite to the input shaft 21, and the transition shaft 24, the input shaft 21 and the output screw rod 22 are parallel; the first transmission group 23 is transmission-connected with the output screw rod 22, and drives the output screw rod 22 to rotate continuously; the transition shaft 24 is transmission-connected with the output screw rod 22, and drives the output screw rod 22 to rotate intermittently.

[0024] The switching module 3 is arranged on the workbench; the switching module 3 includes a first switching gear group 31 and a second switching gear group 32, and its action can be used to switch between two working states of the equipment; in the first working state of the equipment, the first switching gear group 31 will mesh with the first transmission group 23 and the input shaft 21, so that a transmission connection can be formed between the first transmission group 23 and the input shaft 21 through the first switching gear group 31; in the second working state of the equipment, the second switching gear group 32 will mesh with the input shaft 21 and the transition shaft 24, so that a transmission connection can be formed between the input shaft 21 and the transition shaft 24; in different working states, only one of the first switching gear group 31 and the second switching gear group 32 participates in the transmission work.

[0025] The detection module 4 is connected to the clamping assembly and is used to detect the pulling force.

[0026] The driving module 5 is connected to the input shaft 21 and is used to drive the input shaft 21 to rotate.

[0027] The working principle of the device is as follows: the switching module 3 has two different transmission paths to transmit the force of the input shaft 21 to the output screw rod 22, which corresponds to the two working states of the device; The first working state is that when the second switching gear set 32 ​​drives and connects the input shaft 21 and the transition shaft 24, the power of the driving module 5 will be transmitted to the transition shaft 24 through the input shaft 21. Since the transition shaft 24 drives the output screw rod 22 to rotate intermittently, the stretching movable member 12 will present an intermittent working form of moving a certain distance, stopping for a period of time, moving a certain distance, and stopping for a period of time. In this form, if the copper wire is not straightened, then during the time period when the stretching movable member 12 stops, the copper wire will not generate excessive tension on the clamping assembly or even no tension; once the copper wire is straightened and begins to be stretched, then during the time period of stopping, the copper wire will be stretched and will generate corresponding tension on the clamping assembly; by detecting the tension value of the detection module 4 during this stop time period, the time point when the copper wire is straightened and begins to be stretched can be accurately determined, thereby switching it to the second working state; In the second working state, when the first switching gear group 31 connects the first transmission group 23 and the input shaft 21, the power of the driving module 5 will be transmitted to the first transmission group 23 through the input shaft 21 to drive the stretching movable member 12 to continuously stretch the copper wire until the copper wire is broken and the tension value of the detection module 4 returns to zero. At this time, the tensile test can be completed and the elongation of the copper wire can be calculated.

[0028] It can be seen that the device can effectively distinguish the conversion point from straightening to stretching of the copper wire, so as to effectively record the accurate process of copper wire stretching and effectively improve the accuracy of the copper wire elongation test results.

[0029] like Figure 2 As shown, the clamping assembly includes a first clamping member 14a arranged on the stretching fixed member 13 and a second clamping member 14b arranged on the stretching movable member 12; the first clamping member 14a is slidably connected to the stretching fixed member 13, and a clamping plate 14a1 is arranged at one end of the first clamping member 14a away from the stretching movable member 12, so that the first clamping member 14a is pulled by the second clamping member 14b through the copper wire, and when it moves toward the stretching movable member 12, the clamping plate 14a1 will be stuck by the stretching fixed member 13 and will no longer move; at this time, the detection module 4 is arranged between the clamping plate 14a1 and the stretching fixed member 13, and the tensile force when measuring the copper wire when stretching can be converted into the pressure of the clamping plate 14a1 on the stretching fixed member 13, so that the measurement is easier and more accurate than measuring the tensile force.

[0030] Preferably, please refer to Figure 4 The transition shaft 24 is provided with an output gear 24a, and the output gear 24a rotates with the transition shaft 24; the output gear 24a has only one section of teeth, and the output gear 24a is connected to the output screw rod 22 through transmission to form an intermittent transmission structure; through the output gear 24a, the force of the input shaft 21 is transmitted to the output screw rod 22 through the second switching gear set 32, thereby driving the stretching movable member 12 to move on the slide rail 11.

[0031] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the transmission module 2 includes a second transmission group 25 and a third transmission group 26; the second transmission group 25 contains a meshing first gear 25a and a second gear 25b; the first gear 25a is sleeved on the output screw rod 22, and when the first gear 25a rotates, it drives the output screw rod 22 to rotate; the second gear 25b is connected to the first transmission group 23; the third transmission group 26 contains a meshing third gear 26a and a fourth gear 26b; the third gear 26a is meshed with the output gear 24a; the fourth gear 26b is sleeved on the output screw rod 22, and when the fourth gear 26b rotates, it drives the output screw rod 22 to rotate.

[0032] The first transmission group 23 includes a fifth gear 23a and a sixth gear 23b, which rotate synchronously; the fifth gear 23a is meshed with the second gear 25b, and the sixth gear 23b is connected to the first switching gear group 31; when the first switching gear group 31 transmits to the input shaft 21, the first transmission group 23 rotates.

[0033] The cooperation between the above-mentioned first transmission group 23, second transmission group 25, third transmission group 26 and the first switching gear group 31, second switching gear group 32 realizes that under the two working states of the equipment, the rotation direction of the output screw 22 is relatively consistent with the rotation direction of the input shaft 21. That is, assuming that the stretching movable member 12 moves in the direction away from the stretching fixed member 13, the output screw 22 needs to be reversed. In all states of the first working state and the second working state, it is only necessary to keep the input shaft 21 rotating in one direction, so that the driving module 5 that drives the input shaft 21 does not need to stop and reverse when switching, which helps to maintain the stability of power transmission, improves transmission efficiency, and reduces transmission loss. It can not only complete intermittent tension tests in a meticulous manner, but also can robustly cope with continuous tension conditions, thereby improving the flexibility of the equipment in conducting tests.

[0034] The device also includes a fixing component 6, which is arranged on one side of the output screw rod 22 and is used to fix the switching module 3, the transition shaft 24, the second transmission group 25 and the third transmission group 26; the fixing component 6 is designed to ensure that the relative position and matching relationship between these key transmission components will not change, avoid power transmission errors caused by vibration or displacement, form a stable foundation for the equipment, and improve transmission efficiency and stability.

[0035] like Figure 5As shown, the switching module 3 includes a switching component 33, and the switching component 33 contains a fixed rod 33a fixedly connected to the fixed component 6; the switching component 33 rotates around the axis of the fixed rod 33a, and when switching between two working states of the device, it drives the first switching gear set 31 or the second switching gear set 32 ​​to connect with the input shaft 21 to participate in the transmission work.

[0036] The fixing component 6 is provided with a guide groove 61; the switching component 33 is provided with a guide rod 33b, which extends into the guide groove 61 and slides in the guide groove 61 to drive the rotation of the switching component 33; when the guide rod 33b is at both ends of the guide groove 61, the device is in two working states respectively; the design of the guide groove 61 and the guide rod 33b enables the switching component 33 to rotate around the axis of the fixing rod 33a under controlled conditions to complete the switching of the working state; the sliding of the guide rod 33b drives the switching component 33 to move along a preset trajectory in the guide groove 61, so that the switching action is more precise and stable.

[0037] The guide rod 33b is rotatably set on the switching component 33; the switching component 33 also includes a switching rod 33c, one end of the switching rod 33c is rotatably set on the workbench, and the other end is fixedly connected to the guide rod 33b; the switching rod 33c is used to push the guide rod 33b to slide in the guide groove 61; the switching rod 33c pushes the guide rod 33b to slide, thereby realizing the rapid switching of the working state of the equipment, without the need for complicated operating steps, and greatly improving the operating convenience of the equipment.

[0038] The present invention also provides a low-oxygen copper wire elongation tensile test method, which is used in the above-mentioned low-oxygen copper wire elongation tensile test equipment and comprises the following steps: S10: Clamp the copper wire to be tested on the clamping assembly; wherein the first clamping member 14a fixes one end of the copper wire, and the second clamping member 14b is fixed on the stretching movable member 12 to clamp the other end of the copper wire; then the switching module 3 is actuated to make the switching rod 33c push the guide rod 33b to slide in the guide groove 61, until the second switching gear set 32 ​​drives and connects the input shaft 21 and the transition shaft 24; the detection module 4 detects the tension of the copper wire pulled by the clamping assembly in real time and displays the tension indication; S20: The driving module 5 drives the input shaft 21 to rotate, and the power of the input shaft 21 is transmitted to the output screw rod 22 through the second switching gear set 32, the transition shaft 24, and the third transmission set 26; S30: The output screw rod 22 rotates intermittently, driving the stretching movable member 12 to move intermittently on the slide rail 11, and obtaining the reading of the detection module 4 during the movement interval. If the reading of the detection module 4 is greater than the set value, enter S40; S40: The switching module 3 is actuated, the switching rod 33c is operated to push the guide rod 33b, and the guide rod 33b slides to the other end of the guide groove 61, completing the rotation of the switching assembly 33, so that the first switching gear set 31 is connected to the input shaft 21 and the first transmission set 23; at this time, the power of the input shaft 21 is transmitted to the output screw rod 22 through the first switching gear set 31, the first transmission set 23, and the second transmission set 25; until the copper wire is broken, the driving module 5 stops working; S50: Record the position of the stretching movable member 12 at the beginning of S40, the position of the stretching movable member 12 at the end of S40, and the reading of the detection module 4 at the end of S40, and calculate the elongation This test method can effectively solve problems such as insufficient straightening and large errors in traditional tests, improve the efficiency of equipment testing, and make the test more stable and smooth.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low oxygen copper wire elongation tensile test equipment, characterized in that: include: The stretching module (1) comprises a stretching movable member (12) and a stretching fixed member (13) which are arranged opposite to each other; the stretching fixed member (13) is fixed on a workbench; the stretching movable member (12) moves linearly on the action table towards or away from the stretching fixed member (13); and clamping assemblies are provided on the stretching movable member (12) and the stretching fixed member (13) for clamping the copper wire; The transmission module (2) comprises an input shaft (21), an output screw rod (22), a first transmission group (23) and a transition shaft (24); the output screw rod (22) is rotatably arranged on a workbench, and the stretching movable member (12) is transmission-connected with the output screw rod (22); the first transmission group (23) is sleeved on the input shaft (21); the transition shaft (24) is arranged at one end of the input shaft (21); the first transmission group (23) is transmission-connected with the output screw rod (22) and drives the output screw rod (22) to rotate continuously; the transition shaft (24) is transmission-connected with the output screw rod (22) and drives the output screw rod (22) to rotate intermittently; A switching module (3) is arranged on a workbench; the switching module (3) comprises a first switching gear set (31) and a second switching gear set (32); in a first working state of the device, the first switching gear set (31) is drivingly connected to the first transmission set (23) and the input shaft (21); in a second working state of the device, the second switching gear set (32) is drivingly connected to the input shaft (21) and the transition shaft (24); A detection module (4), connected to the clamping assembly, and used for detecting the pulling force; A driving module (5) is used to drive the input shaft (21) to rotate.

2. The low oxygen copper wire elongation tensile test equipment according to claim 1, characterized in that: The clamping assembly comprises a first clamping member (14a) arranged on the stretching fixed member (13); the first clamping member (14a) is slidably connected to the stretching fixed member (13), and a clamping plate (14a1) is arranged at one end of the first clamping member (14a) away from the stretching movable member (12); the detection module (4) is arranged between the clamping plate (14a1) and the stretching fixed member (13).

3. The low oxygen copper wire elongation tensile test equipment according to claim 1, characterized in that: The transition shaft (24) is provided with an output gear (24a), and the output gear (24a) rotates along with the transition shaft (24); the output gear (24a) has only one section of teeth, and the output gear (24a) is transmission-connected to the output screw rod (22).

4. The low oxygen copper wire elongation tensile test equipment according to claim 3, characterized in that: The transmission module (2) comprises a second transmission group (25) and a third transmission group (26); the second transmission group (25) comprises a first gear (25a) and a second gear (25b) which are meshed; the first gear (25a) is sleeved on the output screw rod (22); the second gear (25b) is connected to the first transmission group (23); the third transmission group (26) comprises a third gear (26a) and a fourth gear (26b) which are meshed; the third gear (26a) is meshed with the output gear (24a); the fourth gear (26b) is sleeved on the output screw rod (22).

5. The low oxygen copper wire elongation tensile test equipment according to claim 4, characterized in that: The first transmission group (23) comprises a fifth gear (23a) and a sixth gear (23b), and the fifth gear (23a) and the sixth gear (23b) rotate synchronously; the fifth gear (23a) is meshed with the second gear (25b), and the sixth gear (23b) is connected to the first switching gear group (31); when the first switching gear group (31) is in transmission with the input shaft (21), the first transmission group (23) rotates.

6. The low oxygen copper wire elongation tensile test equipment according to claim 1, characterized in that: It comprises a fixing assembly (6) which is arranged on one side of the output screw rod (22) and is used to fix the switching module (3).

7. The low oxygen copper wire elongation tensile test equipment according to claim 6, characterized in that: The switching module (3) comprises a switching component (33), wherein the switching component (33) comprises a fixing rod (33a) fixedly connected to the fixing component (6); the switching component (33) rotates around the axis of the fixing rod (33a), and when switching between two working states of the device, drives the first switching gear set (31) or the second switching gear set (32) to connect with the input shaft (21) to participate in transmission work.

8. The low oxygen copper wire elongation tensile test equipment according to claim 7, characterized in that: The fixing component (6) is provided with a guide groove (61); the switching component (33) is provided with a guide rod (33b), the guide rod (33b) extends into the guide groove (61), slides in the guide groove (61), and drives the switching component (33) to rotate; when the guide rod (33b) is at both ends of the guide groove (61), the device is in two working states respectively.

9. The low oxygen copper wire elongation tensile test equipment according to claim 8, characterized in that: The guide rod (33b) is rotatably arranged on the switching assembly (33); the switching assembly (33) further comprises a switching rod (33c), one end of which is rotatably arranged on a workbench, and the other end of which is fixedly connected to the guide rod (33b); the switching rod (33c) is used to push the guide rod (33b) to slide in the guide groove (61).

10. A method for testing the elongation of low-oxygen copper wire, characterized in that: The low-oxygen copper wire elongation tensile test equipment according to any one of claims 1 to 9 comprises the following steps: S10: clamping the copper wire on the clamping assembly; the switching module (3) is actuated to cause the second switching gear set (32) to drive and connect the input shaft (21) and the transition shaft (24); the detection module (4) detects in real time the pulling force of the clamping assembly pulling the copper wire and displays the pulling force reading; S20: the driving module (5) drives the input shaft (21) to rotate, and the power of the input shaft (21) is transmitted to the output screw rod (22) through the second switching gear set (32), the transition shaft (24), and the third transmission set (26); S30: the output screw rod (22) rotates intermittently, driving the stretching movable member (12) to move intermittently, and obtaining the reading of the detection module (4) during the movement interval. If the reading of the detection module (4) is greater than the set value, then enter S40; S40: the switching module (3) is actuated, so that the first switching gear set (31) is connected to the input shaft (21) and the first transmission set (23); at this time, the power of the input shaft (21) is transmitted to the output screw rod (22) through the first switching gear set (31), the first transmission set (23) and the second transmission set (25); until the copper wire is broken, the driving module (5) stops working; S50: recording the position of the stretching movable member (12) at the beginning of S40, the position of the stretching movable member (12) at the end of S40 and the reading of the detection module (4) at the end of S40, and calculating the elongation.

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