A tensile testing device for high-strength and high-conductivity alloy materials

Abstract

The present invention discloses a high-strength and high-conductivity alloy material tensile testing device, and relates to the technical field of material tensile testing equipment. The present invention includes a gantry with columns and upper and lower beams, a load sensor, a hydraulic cylinder, and a control host. The hydraulic cylinder is installed at the upper beam of the gantry and the load sensor is installed at the extended end of the hydraulic cylinder. A clamp for clamping a high-voltage line sample is installed at the lower beam of the gantry and on the load sensor. The loading rack is arranged so that it reciprocates in the middle of the gantry under the action of a first electric push rod, so that the clamp can clamp the high-voltage line sample material when the first electric push rod is extended, and then perform tensile testing. When the first electric push rod is shortened, it is convenient to batch clamp the next batch of high-voltage line sample materials, thereby solving the problem that the tensile strength testing machine of the prior art does not have the function of batch testing tensile materials.

Description

Technical Field

[0001] The invention relates to the technical field of material stretching detection equipment, and in particular to a high-strength and high-conductivity alloy material stretching detection device. Background Art

[0002] High-strength and high-conductivity alloy materials are widely used in high-voltage transmission lines due to their excellent electrical conductivity and mechanical strength. For example, 6000 series aluminum alloys (Al-Mg-Si series) are widely used in power supply systems due to their high specific strength and electrical conductivity.

[0003] In the high-voltage line production line, in order to ensure that the quality of the high-voltage lines produced meets the requirements, sampling inspections are carried out on the high-voltage lines of the same batch in the production line. For high-voltage lines, tensile strength testing is an important indicator.

[0004] In the prior art, the equipment for testing the tensile strength of materials generally adopts a tensile strength testing machine. However, in practice, the tensile strength testing machine is more suitable for the tensile strength testing of the early research and development materials. Considering that the number of samples for product quality control inspection in production is very large, it is not very suitable for the later batch inspection of product quality (the reason is that the tensile strength testing machine of the prior art requires manual clamping of the samples. Once the number of samples is very large, it is very troublesome to clamp back and forth and collect the stretching data, which requires a lot of manpower). Summary of the invention

[0005] The purpose of the present invention is to optimize the tensile strength testing machine of the prior art so that it can obtain the function of batch testing of tensile materials. The present invention provides a tensile testing device for high-strength and high-conductivity alloy materials.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A high-strength and high-conductivity alloy material tensile testing device, comprising a gantry with columns and upper and lower beams, a load sensor, a hydraulic cylinder, and a control host, characterized in that the hydraulic cylinder is installed at the upper beam of the gantry and the load sensor is installed at the extended end of the hydraulic cylinder, and a clamp for clamping a high-voltage wire sample is installed at the lower beam of the gantry and on the load sensor;

[0008] The clamp comprises a main clamping plate which can be slidably mounted on the load sensor up and down, and an auxiliary clamping plate is rotatably mounted on the bottom of the main clamping plate, so that when the high-voltage wire sample is located between the main clamping plate and the auxiliary clamping plate, the auxiliary clamping plate is driven to cooperate with the main clamping plate to clamp the high-voltage wire sample;

[0009] The utility model also comprises a material carrier which crosses the gantry and is used for feeding batches of high-voltage wire samples individually between the main clamping plate and the auxiliary clamping plate.

[0010] Furthermore, the material rack includes symmetrically arranged long strip frame plates, wire clamping mechanisms equidistantly arranged on the long strip frame plates, and a control mechanism for controlling the long strip frame plates to pass through the door frame at equal distances in a single pass. The two long strip frame plates are arranged parallel to each other up and down and L-shaped plates are fixed at the ends of both. A screw rod is arranged through the L-shaped plates on the same side, and nuts are threaded on both ends of the screw rod in the thickness direction of the L-shaped plate to make the spacing between the two long strip frame plates adjustable.

[0011] Furthermore, the wire clamping mechanism includes two half-platens which are truncated cone-shaped when combined, a clamping hole for clamping the wire harness is combined and constructed between the two half-platens, a T-slider is constructed along the oblique edge on the two half-platens facing away from each other, a sliding groove for slidingly installing the half-platens and the T-slider is constructed on the long strip frame plate, a pull plate is also fixedly connected to the outer edge of the T-slider, and a tension spring is connected between the pull plate and the inner wall of the sliding groove to prevent the half-platens from sliding out of the sliding groove.

[0012] The control mechanism comprises a U-shaped support frame arranged on the ground, the support frame is fixed with two sets of guide columns that slide through the long strip frame plates on the upper and lower sides, and a wheel leg is fixed under the long strip frame plates on the lower side, and a wheel that can move on the support frame is rotatably installed at the bottom of the wheel leg. A slide groove is constructed at the bottom of the wheel leg, and a slide key that cannot escape from the slide groove is slidably arranged inside the slide groove and has a rubber wheel rotatably installed at the bottom of the slide key. A first spring is connected between the slide key and the inner top wall of the slide groove, and the first spring is in a pre-stressed state. The support frame is equidistantly configured with sinking pits on the plane where the wheels roll, and a pressure-touch delay switch electrically connected to the control host is installed at the bottom of the sinking pit, and the rubber wheel can fall into the sinking pit to trigger the pressure-touch delay switch during the travel process. It also comprises a first electric push rod fixedly installed on the support frame and whose output shaft end is fixed to the wheel leg, and the first electric push rod is electrically connected to the control host.

[0013] Furthermore, a mounting plate is fixedly connected to the working part of the load sensor, the mounting plate is configured with a guide groove, a guide block is fixed to the main plate and slidably arranged in the guide groove, the side and top of the guide block are configured with anti-slip protrusions, a second spring in a pre-stressed state is connected between the mounting plate and the main plate, the non-clamping side of the main plate is configured with a first inclined surface, and a first wedge block adapted to the first inclined surface is fixed to the side of the long frame plate to form a situation where the long frame plate moves and drives the first wedge block to press on the first inclined surface to cause the main plate to rise, and a first avoidance groove is also configured on the main plate to assist the high-voltage line sample to pass through.

[0014] Furthermore, a second electric push rod electrically connected to the control host is hinged between the auxiliary splint and the main splint, and a stress sensor for detecting the corresponding first inclined surface is installed at the first wedge block, and the stress sensor is electrically connected to the control host.

[0015] Furthermore, legs are fixed at the bottom of the half platform, rollers are rotatably installed at the bottom of the legs, vertical frames are fixed on the sides of the support frame, square rods are symmetrically fixed on the vertical frames, and the ends of the square rods are constructed to support the second inclined plane and the third inclined plane.

[0016] Furthermore, the distance between the stand and the high-voltage line sample clamped in the fixture, the distance between two adjacent sinking pits, and the distance between two adjacent clamping holes are equal.

[0017] Furthermore, a second wedge block is fixed to the back side of the first wedge block, and a fourth inclined surface is constructed on the main plate on the opposite side of the first inclined surface. The second wedge block is adapted to the fourth inclined surface to form a long strip frame plate, and when it returns, the second wedge block is driven to press on the fourth inclined surface to make the main plate rise. The thickness of the second wedge block is half of that of the first wedge block, and a second avoidance groove is constructed on the main plate.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention sets a material carrier so that it reciprocates in the middle of the door frame under the action of the first electric push rod, so that the clamp can clamp the high-voltage line sample material when the first electric push rod is extended, and then perform a tensile test. When the first electric push rod is shortened, the next batch of high-voltage line sample materials can be conveniently clamped in batches, thereby solving the problem that the tensile strength testing machine in the prior art does not have the ability to batch test tensile materials.

[0020] 2. The present invention sets a stress sensor so that the control host needs to obtain double confirmation from the stress sensor and the pressure-touch delay switch when controlling the hydraulic cylinder to move. Therefore, when the first electric push rod shortens the return stroke to clamp new sample materials, the hydraulic cylinder and the second electric push rod will not move, thereby avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 The present invention Figure 1 A schematic diagram of a three-dimensional structure from another angle;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the door frame of the present invention;

[0024] Figure 4It is a schematic diagram of the three-dimensional structure of the material carrier of the present invention;

[0025] Figure 5 This is a state diagram of the high-voltage wire sample material of the present invention before it reaches the fixture;

[0026] Figure 6 This is a process diagram of the present invention when the clamp is lifted to avoid hitting the high-voltage line sample material;

[0027] Figure 7 is a state diagram of the clamp of the present invention when clamping a sample material;

[0028] Figure 8 The present invention Figure 5 Another angle view of

[0029] Fig. 9 The present invention Figure 6 Another angle view of

[0030] Fig.10 The present invention Figure 7 Another angle view of

[0031] Fig.11 The present invention Figure 5 Plan view of

[0032] Fig.12 It is a partial structural schematic diagram of the present invention;

[0033] Fig.13 is a cross-sectional view of the half tabletop of the present invention;

[0034] Fig.14 is a cross-sectional view of the sliding key of the present invention;

[0035] Figure numerals: 1, gantry; 2, load sensor; 3, hydraulic cylinder; 4, column; 5, clamp; 501, main clamp; 502, auxiliary clamp; 6, material carrier; 61, long strip frame plate; 611, L-shaped plate; 612, screw rod; 613, nut; 62, wire clamping mechanism; 621, half table; 622, clamping hole; 623, T slider; 624, sliding groove; 625, pull plate; 626, tension spring; 63, control mechanism; 631, support frame; 632, guide column; 633, wheel leg; 634, wheel; 635, slide Groove; 636, sliding key; 637, rubber wheel; 638, first spring; 639, sinking pit; 640, pressure-touch delay switch; 641, first electric push rod; 7, mounting plate; 71, guide groove; 72, guide block; 73, anti-drop protrusion; 8, second spring; 9, first inclined plane; 10, first wedge block; 11, second electric push rod; 12, stress sensor; 13, support leg; 14, roller; 15, stand; 16, square rod; 17, second inclined plane; 18, third inclined plane; 19, second wedge block; 20, fourth inclined plane. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] The present embodiment provides a high-strength and high-conductivity alloy material tensile testing device, which is mainly used to solve the problem that the tensile strength testing machine in the prior art is not capable of batch testing tensile materials, so that it has no advantage in producing quality inspection batches of high-voltage wire sample strength, and provides the following technical solutions. Figure 1-Figure 14 Make a detailed description: Embodiment 1:

[0038] A high-strength and high-conductivity alloy material tensile testing device, comprising a gantry 1 with a column 4 and upper and lower beams, a load sensor 2, a hydraulic cylinder 3, a control host, etc. The above is the basic structure of a tensile strength testing machine in the prior art. It should be noted that the control host is a computer with a display, which is equipped with a control system and a processing program. This is the prior art and will not be described in detail here. The hydraulic cylinder 3 is installed at the upper beam of the gantry 1 and the load sensor 2 is installed at the elongated end of the hydraulic cylinder 3. A clamp 5 for clamping a high-voltage wire sample is installed at the lower beam of the gantry 1 and on the load sensor 2;

[0039] Specifically, the clamp 5 includes a main clamping plate 501 which can be slidably mounted on the load sensor 2 up and down, and an auxiliary clamping plate 502 is rotatably mounted on the bottom of the main clamping plate 501, so that when the high-voltage wire sample is located between the main clamping plate 501 and the auxiliary clamping plate 502, the auxiliary clamping plate 502 is driven to cooperate with the main clamping plate 501 to clamp the high-voltage wire sample;

[0040] The main creative point of the present application lies in the material carrier 6 , which is embodied as follows: it also includes a material carrier 6 that crosses the door frame 1 , and the material carrier 6 is used to feed batches of high-voltage line samples individually between the main clamping plate 501 and the auxiliary clamping plate 502 .

[0041] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the loading rack 6 includes symmetrically arranged long strip frame plates 61 (the long strip frame plates 61 are made of lightweight aluminum material), clamping mechanisms 62 equidistantly arranged on the long strip frame plates 61, and a control mechanism 63 for controlling the long strip frame plates 61 to pass through the door frame 1 at an equal distance in a single time. The two long strip frame plates 61 are arranged in parallel up and down and L-shaped plates 611 are fixed at the ends of both. A screw rod 612 is penetrated between the L-shaped plates 611 located on the same side. The screw rod 612 is located at both ends of the L-shaped plate 611 in the thickness direction and nuts 613 are threadedly provided, so that the distance between the two long strip frame plates 61 is adjustable. By rotating the nut 613 located under the L-shaped plate 611, the L-shaped plate 611 can slide in the length direction of the screw rod 612, and then the distance between the two long strip frame plates 61 can be adjusted, and then the nut 613 located above the thickness direction of the L-shaped plate 611 is rotated to fix it.

[0042] like Figure 5 , Fig.12 and Fig.13 As shown, in this embodiment, the wire clamping mechanism 62 includes two half-platens 621 that are combined into a truncated cone shape, and a clamping hole 622 for clamping the wire harness is constructed between the two half-platens 621. The inner wall of the clamping hole 622 is treated with rough means to obtain greater friction. At the same time, the two half-platens 621 are both constructed with T sliders 623 along the oblique edges on the sides facing away from each other, and the long strip frame plate 61 is constructed with sliding grooves 624 for slidingly installing the half-platens 621 and the T sliders 623, as shown in FIG. Fig.13 The sliding groove 624 shown in the figure includes the groove for the sliding of the half plate 621 and the groove for the sliding of the T slider 623, which are described together here. Figure 5 The outer edge of the T slider 623 is also fixedly connected to a pull plate 625, and a tension spring 626 is connected between the pull plate 625 and the inner wall of the sliding groove 624 to prevent the half-table 621 from sliding out of the sliding groove 624, see Fig.13, located in the middle is the high-voltage line sample material. When preparing for the test, you only need to push the two half-platens 621 upwards. Then, under the guidance of the T slider 623, the clamping hole 622 will expand, and the high-voltage line sample material can be put in. After releasing the hand that pushes the half-platen 621, the high-voltage line sample material will be automatically clamped. When the main clamping plate 501 and the auxiliary clamping plate 502 clamp and stretch the sample material, the two half-platens 621 will not be unable to perform subsequent tensile strength testing due to the fixed distance between the two long strip frame plates 61 because of the sliding grooves 624.

[0043] like Figure 4 and Fig.14 As shown, in this embodiment, the control mechanism 63 includes a U-shaped support frame 631 arranged on the ground, and two sets of guide columns 632 slidingly penetrating the long strip frame plates 61 located on the upper and lower sides are fixed on the support frame 631. It should be additionally explained here that the fixing method between the guide columns 632 and the support frame 631 is to tap the ends of the guide columns 632 and then fix them to the support frame 631 by bolts. In this way, it is only necessary to construct screw holes of different heights on the support frame 631 to match the spacing adjustment between the two long strip frame plates 61. Please refer to Fig.14A wheel leg 633 is fixed below the long strip frame plate 61 at the lower side, and a wheel 634 that can move on the support frame 631 is rotatably installed at the bottom of the wheel leg 633. The wheel 634 here is a hard wheel 634, which can provide support for the long strip frame plate 61 by rolling movement and cooperating with the wheel leg 633, and a slide groove 635 is constructed at the bottom of the wheel leg 633. A slide key 636 that cannot escape from the slide groove 635 is provided for sliding inside the slide groove 635, and a rubber wheel 637 is rotatably installed at the bottom of the slide key 636. A first spring 638 is connected between the slide key 636 and the inner top wall of the slide groove 635. The first spring 638 is pre-stressed, that is, the first spring 638 provides a downward pressing tendency for the slide key 636. At the same time, the support frame 631 is equidistantly configured with sinking pits 639 on the rolling plane of the wheel 634. A pressure-touch delay switch 640 electrically connected to the control host is installed at the bottom of the sinking pit 639. The rubber wheel 637 can fall into the sinking pit 639 during the movement to trigger the pressure-touch delay switch 640. It also includes a fixed The first electric push rod 641 is fixedly mounted on the support frame 631 and the end of the output shaft is fixed to the wheel leg 633. The first electric push rod 641 is electrically connected to the control host. When the rubber wheel 637 falls into one of the sinking pits 639, the sample clamped in the middle of the clamping hole 622 is between the main clamping plate 501 and the auxiliary clamping plate 502. At this time, the rubber wheel 637 triggers the pressure-touch delay switch 640. The control host that receives the signal controls the first electric push rod 641 to stop the extension action, and controls the main clamping plate 501 and the auxiliary clamping plate 502 to stop the extension action. 02 starts clamping, and after clamping is completed, the hydraulic cylinder 3 is controlled to shorten to stretch the high-voltage wire sample material. At this time, the data obtained by the load sensor 2 will be continuously transmitted to the control host, and sorted by the system software inside the control host (this is the existing technology and will not be elaborated on), thus completing the detection of a single high-voltage wire sample material. Here, we take the time for stretching and testing a single sample as t, then after t time after the pressure-touch delay switch 640 is triggered, the first electric push rod 641 continues to extend at a uniform speed to reach the next equidistant position. Embodiment 2:

[0044] This embodiment improves the following technical solutions on the basis of embodiment 1. Considering that the high-voltage wire material sample may be bent after hitting the main clamping plate 501 and cannot be clamped by the main clamping plate 501 and the auxiliary clamping plate 502, the working part of the load sensor 2 is fixedly connected with a mounting plate 7, and a guide groove 71 is constructed on the mounting plate 7. A guide block 72 slidably arranged in the guide groove 71 is fixed on the main clamping plate 501, and the side and top of the guide block 72 are constructed with anti-slip protrusions 73, so that the main clamping plate 501 The clamp 5 composed of the auxiliary clamp plate 502 has the ability to move along the thickness direction of the mounting plate 7. At the same time, in order to allow the clamp 5 to be reset, a second spring 8 in a pre-stressed state is connected between the mounting plate 7 and the main clamp plate 501. The non-clamping side of the main clamp plate 501 is constructed with a first inclined surface 9. The side of the long strip frame plate 61 is fixed with a first wedge block 10 adapted to the first inclined surface 9, so that when the long strip frame plate 61 moves, the first wedge block 10 is driven to press on the first inclined surface 9 to make the main clamp plate 501 rise. Figures 5 to 7 As shown in the figure, these three figures show the three states of the long strip frame plate 61 during its travel. Figure 6 The first wedge block 10 acts on the first inclined surface 9 and then the main splint 501 and the auxiliary splint 502 rise, thereby avoiding hitting the high-voltage line sample material. At the same time, in order to avoid the upward stroke being too large to be realized, the main splint 501 here is also constructed with a first avoidance groove for assisting the high-voltage line sample to pass through, so that the main splint 501 does not need to rise too much to avoid the high-voltage line sample material.

[0045] like Figures 5 to 11 As shown, in this embodiment, in order to ensure the accuracy of the t time, a second electric push rod 11 electrically connected to the control host is hinged between the auxiliary clamping plate 502 and the main clamping plate 501. The second electric push rod 11 here is a pressure-touch delay switch 640. After being triggered, the control host controls the second electric push rod 11 to shorten, thereby making the auxiliary clamping plate 502 close to the main clamping plate 501 to clamp the high-voltage wire sample material (see Fig.11 ), and more importantly, the first wedge block 10 is equipped with a stress sensor 12 for detecting the stress at the corresponding first inclined surface 9, and the stress sensor 12 is electrically connected to the control host, such as Figure 5 As shown in , what is installed at this time is the working part of the stress sensor 12. Setting the stress sensor 12 can enable the control host to monitor the time period when the first wedge block 10 faces the first inclined surface 9, thereby providing a reference value for the subsequent adjustment of the setting of the t time. It should be additionally explained that the action of the second electric push rod 11 driving the auxiliary clamping plate 502 and the main clamping plate 501 requires the stress sensor 12 to detect both the stress change that meets the requirements and the pressure-touch delay switch 640 before it will be triggered. Embodiment 3:

[0046] This embodiment adds the following basic scheme on the basis of embodiment 1 and embodiment 2, such as Figures 7 to 9 as well as Fig.12 As shown, the bottom of the half platform 621 is fixed with a leg 13, the bottom of the leg 13 is rotatably mounted with a roller 14, the side of the support frame 631 is fixed with a stand 15, and the stand 15 is symmetrically fixed with a square rod 16, and the end of the square rod 16 is configured to support the second inclined surface 17 and the third inclined surface 18, see Fig.12 When the roller 14 rises along the second inclined plane 17, the two half-platens 621 can be pushed up, thereby releasing the material after the tensile strength test is completed. At the same time, when the first electric push rod 641 retracts after extending to a predetermined length, when the roller 14 moves along the third inclined plane 18, the two half-platens 621 will open and the clamping hole 622 will be enlarged. At this time, the sample test has been completed, but the action of the rubber wheel 637 acting on the pressure-touch delay switch 640 is still running, that is, the pause time t still exists, and the clamping hole 622 is in an open state at this time, and the stress sensor 12 does not detect stress. Then this t time waiting is the time for personnel to pass the next group of high-voltage line sample materials to be tested into the clamping hole 622, so that a new sample is obtained. It can be simply understood as a loading operation, that is, as long as the first electric push rod 641 reciprocates, a cyclic and batch tensile testing method can be realized, that is, when the first electric push rod 641 is extended, it is a testing time period, and when the first electric push rod 641 is shortened, it is a loading time period.

[0047] like Figure 5 , Fig. 9 As shown, in this embodiment, the distance between the stand 15 and the high-voltage wire sample clamped in the clamp 5, the distance between two adjacent sinking pits 639, and the distance between two adjacent clamping holes 622 are equal, the back of the first wedge block 10 is fixed with a second wedge block 19, the main clamping plate 501 is located on the opposite side of the first inclined surface 9 and is configured with a fourth inclined surface 20, the second wedge block 19 is adapted to the fourth inclined surface 20, so as to form a long strip frame plate 61 when returning to drive the second wedge block 19 to press on the fourth inclined surface The main splint 501 rises on the surface 20. When the first electric push rod 641 shortens and returns, the second wedge block 19 acts on the fourth inclined surface 20. At this time, the main splint 501 and the auxiliary splint 502 rise, and will not block the return of the first wedge block 10. In order to ensure the usefulness of the first wedge block 10, the thickness of the second wedge block 19 is half of the first wedge block 10 and a second avoidance groove is constructed on the main splint 501. The second avoidance groove is mainly used to provide a construction space for the second wedge block 19.

[0048] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-strength and high-conductivity alloy material tensile testing device, comprising a gantry (1) having a column (4) and upper and lower beams, a load sensor (2), a hydraulic cylinder (3), and a control host, characterized in that: The hydraulic cylinder (3) is mounted on the upper crossbeam of the portal frame (1) and the load sensor (2) is mounted on the extended end of the hydraulic cylinder (3); a clamp (5) for clamping a high-voltage wire sample is mounted on the lower crossbeam of the portal frame (1) and the load sensor (2); The clamp (5) comprises a main clamping plate (501) which is slidably mounted on the load sensor (2) up and down, and an auxiliary clamping plate (502) is rotatably mounted on the bottom of the main clamping plate (501). When the high-voltage wire sample is located between the main clamping plate (501) and the auxiliary clamping plate (502), the auxiliary clamping plate (502) is driven to cooperate with the main clamping plate (501) to clamp the high-voltage wire sample. Also includes a carrier (6) that crosses the gantry (1), the carrier (6) being used to feed a batch of high-voltage wire samples individually between the main plywood (501) and the auxiliary plywood (502); The material carrier (6) comprises symmetrically arranged long strip frame plates (61), wire clamping mechanisms (62) arranged equidistantly on the long strip frame plates (61), and a control mechanism (63) for controlling the long strip frame plates (61) to pass through the door frame (1) at an equal distance in a single pass, the two long strip frame plates (61) being arranged in parallel up and down and having L-shaped plates (611) fixed at their ends, a screw rod (612) penetrating between the L-shaped plates (611) located on the same side, and nuts (613) being threadedly arranged at both ends of the screw rod (612) in the thickness direction of the L-shaped plates (611), so that the spacing between the two long strip frame plates (61) is adjustable; The wire clamping mechanism (62) comprises two half-platens (621) which are combined to form a truncated cone shape, a clamping hole (622) for clamping a wire harness is constructed between the two half-platens (621), a T-slider (623) is constructed along the oblique side of the two half-platens (621) facing away from each other, a sliding groove (624) for slidingly installing the half-platens (621) and the T-slider (623) is constructed on the long strip frame plate (61), a pull plate (625) is fixedly connected to the outer edge of the T-slider (623), and a tension spring (626) is connected between the pull plate (625) and the inner wall of the sliding groove (624) for preventing the half-platens (621) from sliding out of the sliding groove (624); The control mechanism (63) comprises a U-shaped support frame (631) disposed on the ground, two sets of guide posts (632) slidingly penetrating the long strip frame plates (61) located at the upper and lower sides are fixed on the support frame (631), a wheel leg (633) is fixed below the long strip frame plate (61) located at the lower side, a wheel (634) rotatably mounted at the bottom of the wheel leg (633) and movable on the support frame (631), a slide groove (635) is configured at the bottom of the wheel leg (633), a slide key (636) that cannot escape from the slide groove (635) is slidably mounted inside the slide groove (635), a rubber wheel (637) is rotatably mounted at the bottom of the slide key (636), and the slide key (636) is rotatably mounted on the bottom of the slide key (636). A first spring (638) is connected between the inner top wall of the slide groove (635) and the first spring (638), the first spring (638) is in a pre-stressed state, the support frame (631) is located on the plane where the wheel (634) rolls and is equidistantly configured with sinking pits (639), the bottom of the sinking pit (639) is installed with a pressure-touch delay switch (640) electrically connected to the control host, the rubber wheel (637) can fall into the sinking pit (639) during the movement to trigger the pressure-touch delay switch (640), and also includes a first electric push rod (641) fixedly mounted on the support frame (631) and the end of the output shaft is fixed to the wheel leg (633), the first electric push rod (641) is electrically connected to the control host; The working part of the load sensor (2) is fixedly connected with a mounting plate (7), the mounting plate (7) is configured with a guide groove (71), the main plate (501) is fixed with a guide block (72) slidably arranged in the guide groove (71), the side and top of the guide block (72) are configured with anti-dropping protrusions (73), a second spring (8) in a pre-stressed state is connected and arranged between the mounting plate (7) and the main plate (501), the non-clamping side of the main plate (501) is configured with a first inclined surface (9), the side of the long strip frame plate (61) is fixed with a first wedge block (10) adapted to the first inclined surface (9), when the long strip frame plate (61) moves, the first wedge block (10) is driven to press on the first inclined surface (9) so that the main plate (501) rises, and the main plate (501) is also configured with a first avoidance groove for assisting the high-voltage line sample to pass through; A second electric push rod (11) electrically connected to the control host is hinged between the auxiliary clamping plate (502) and the main clamping plate (501); a stress sensor (12) for detecting the stress at the corresponding first inclined surface (9) is installed at the first wedge block (10); the stress sensor (12) is electrically connected to the control host; The bottom of the half platform (621) is fixed with a support leg (13), the bottom of the support leg (13) is rotatably mounted with a roller (14), a stand (15) is fixed to the side of the support frame (631), square rods (16) are symmetrically fixed on the stand (15), and the ends of the square rods (16) are configured to support the second inclined surface (17) and the third inclined surface (18); The distance between the stand (15) and the high-voltage wire sample clamped in the fixture (5), the distance between two adjacent sinking pits (639), and the distance between two adjacent clamping holes (622) are equal; A second wedge block (19) is fixed on the back side of the first wedge block (10); a fourth inclined surface (20) is constructed on the main plate (501) on the opposite side of the first inclined surface (9); the second wedge block (19) is adapted to the fourth inclined surface (20); when the long strip frame plate (61) returns, the second wedge block (19) is driven to press on the fourth inclined surface (20) so that the main plate (501) rises; the thickness of the second wedge block (19) is half of that of the first wedge block (10) and a second avoidance groove is constructed on the main plate (501).

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