A tensile testing device for irregularly shaped metal parts

Abstract

This invention relates to the field of mechanical engineering material testing technology, and discloses a tensile testing device for irregularly shaped metal parts. The device includes a control console with a testing platform at its rear. A tensile mechanism is located on the right side of the testing platform. Two electrically operated telescopic rods are slidably connected to the center of the testing platform. A torque sensor is fixed to the top of each electric telescopic rod. A clamping mechanism is located on one side of each electric telescopic rod. Transmission components are located on both the left and right sides of the testing platform. A placement platform is slidably connected to the center of the control console. The clamping mechanism includes a connecting disc, which is mounted on the side of the electric telescopic rod closest to the placement platform. Through the cooperation of the clamping mechanism and the adjusting components, the clamping mechanism, driven by the adjusting components, causes multiple arc-shaped arms to synchronously extend and retract radially. Combined with an adaptively rotating fixed jaw, it tightly conforms to the complex curved surface of the irregularly shaped workpiece, covering clamping requirements for different size ranges.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering material testing technology, specifically to a tensile testing device for irregularly shaped metal parts. Background Technology

[0002] Irregularly shaped metal parts refer to metal workpieces with complex geometries, asymmetrical structures, or special curved surfaces, such as turbine blades in the aerospace industry and irregularly shaped connectors in the automotive industry. Due to their irregular shapes, these workpieces are prone to problems such as unstable clamping and uneven stress distribution during tensile testing, leading to deviations in test data or even workpiece damage. Traditional testing methods typically rely on standardized fixtures, which are difficult to adapt to the diverse surface characteristics of irregularly shaped parts, especially lacking effective clamping solutions for thin-walled, multi-curved workpieces, severely limiting the accuracy of material mechanical property evaluation.

[0003] In the existing technology, tensile testing equipment for irregularly shaped metal parts is usually composed of hydraulic chucks or rigid mechanical claws. Clamping force is applied through fixed points, and the distance between the claws is manually adjusted to accommodate workpieces of different sizes. After the workpiece is clamped by the hydraulic chuck, a motor drives a screw to move one clamping end while the other side remains fixed, thereby applying a unidirectional tensile force. The tensile process is then captured by a camera at a fixed position, and a load-displacement curve is generated in conjunction with a mechanical sensor.

[0004] Although existing tensile testing equipment can perform basic mechanical property tests on metal parts, some equipment still has certain shortcomings when dealing with irregularly shaped metal parts. The traditional fixtures of existing equipment rely on fixed-point clamping, which is difficult to adapt to the geometric features of complex curved workpieces, resulting in uneven distribution of clamping force, which can easily cause workpiece slippage or surface damage, affecting the test accuracy. Furthermore, during the tensile process, there is only a fixed perspective for observing the surface of the workpiece, which cannot capture the microscopic deformation details of the entire tensile process in real time.

[0005] Therefore, this invention proposes a tensile testing device for irregularly shaped metal parts to address the shortcomings of existing technologies. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a tensile testing device for irregularly shaped metal parts, which solves the problems of unstable clamping of irregularly shaped metal parts, limited observation, and limited data.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a tensile testing device for irregularly shaped metal parts, comprising a control console, a testing platform at the rear of the control console, a tensile mechanism on the right side of the testing platform, two electric telescopic rods slidably connected to the middle of the testing platform, a torque sensor fixed to the top of each electric telescopic rod, a clamping mechanism on one side of each electric telescopic rod, transmission components on both the left and right sides of the testing platform, and a placement platform slidably connected to the middle of the control console;

[0008] The clamping mechanism includes a connecting disc, which is installed on the side of the electric telescopic rod near the placement platform. Multiple evenly distributed connecting seats are fixedly connected to the outer circumference of the connecting disc. An arc-shaped arm is rotatably connected inside the connecting seat. A rotating shaft is fixed at the end of the arc-shaped arm away from the connecting seat. A fixed claw is rotatably connected to the middle of the rotating shaft. An adjustment component is provided in the middle of the connecting disc.

[0009] Preferably, the stretching mechanism includes a motor, which is installed on the right side of the testing table. A bidirectional threaded rod is fixed to the output end of the motor. A bevel gear is fixed to both the left and right ends of the bidirectional threaded rod. Moving blocks are threaded to the outer circumference of both the left and right ends of the bidirectional threaded rod. A connecting mechanism is provided in the middle of the bidirectional threaded rod.

[0010] Preferably, the transmission assembly includes a second bevel gear, which is rotatably connected inside the testing platform. The second bevel gear meshes with the first bevel gear. A one-way threaded rod is fixed inside the second bevel gear, and a connecting frame is threaded to the outer circumference of the one-way threaded rod. A testing mechanism is provided in the middle of the connecting frame.

[0011] Preferably, the connecting mechanism includes a pulley one, which is fixed in the middle of the bidirectional threaded rod. A pulley two is rotatably connected to the rear side of the inner side of the testing platform. A transmission belt is sleeved on the outer periphery of the pulley one and the pulley two. A drive assembly is provided on both the left and right sides of the pulley two.

[0012] Preferably, the adjusting assembly includes an electric push rod, which is fixed inside the connecting disc. A movable sleeve is fixed to one end of the electric push rod away from the connecting disc. A movable disk is fixed to one end of the movable sleeve away from the electric push rod. A plurality of spherical connecting blocks I, evenly distributed in a ring, are fixed to the outer periphery of the side of the movable disk near the movable sleeve. A connecting rod is movably connected to the outer periphery of each spherical connecting block I. A second spherical connecting block is movably connected to the inner end of the connecting rod away from the first spherical connecting block I.

[0013] Preferably, the detection mechanism includes a second motor, which is fixed in the middle of the connecting frame. A main camera is fixed to the output end of the second motor. Connecting rods rotate on both the left and right sides of the main camera, and a secondary camera rotates at the end of the connecting rods away from the main camera.

[0014] Preferably, the drive assembly includes a drive shaft, which is fixed in the middle of the second pulley. A cylindrical gear is fixed on the outer periphery of the drive shaft. A toothed plate slides on the rear inner side of the detection platform. The toothed plate meshes with the cylindrical gear. A transmission block is fixed on the side of the toothed plate near the placement platform. The end of the transmission block away from the toothed plate is fixed to the bottom of the placement platform.

[0015] Preferably, the side of the spherical connecting block away from the connecting rod is fixed to the outer periphery of the arc-shaped arm, and the end of the moving block away from the bidirectional threaded rod is fixed to the bottom of the electric telescopic rod.

[0016] Preferably, the left and right ends of the connecting frame are slidably connected to the left and right sides inside the testing platform, respectively, and the one-way threaded rod is rotatably connected to the inside of the testing platform.

[0017] Preferably, the outer periphery of the transmission block is slidably connected to the inner rear side of the detection stage.

[0018] This invention provides a tensile testing device for irregularly shaped metal parts. It has the following advantages:

[0019] 1. This invention utilizes the cooperation between the clamping mechanism and the adjustment component. The clamping mechanism, driven by the adjustment component, enables multiple arc-shaped arms to synchronously extend and retract radially. Combined with the adaptive rotating fixed jaws, it closely fits the complex curved surface of irregularly shaped workpieces, covering clamping requirements of different size ranges. This effectively avoids local stress concentration, significantly improves testing stability and reliability, and solves the problems of unstable clamping and easy slippage of traditional fixtures for irregularly shaped metal parts.

[0020] 2. This invention utilizes the cooperation of a tensile mechanism, a transmission component, and a detection mechanism. The power of the tensile mechanism is transmitted to the detection mechanism via the transmission component, driving the camera to dynamically adjust its position in the vertical direction. Combined with multi-angle shooting capabilities, it captures key information such as surface crack propagation and microscopic deformation during the workpiece tensile process in real time, and analyzes it synchronously with torque data. This provides high-precision, multi-dimensional data support for material performance evaluation, solving the problem that traditional testing equipment cannot simultaneously record tensile mechanical data and deformation details.

[0021] 3. This invention solves the problem of limited observation field of view caused by workpiece movement during the stretching process by cooperating with the stretching mechanism, the connecting mechanism, and the driving component. While the stretching mechanism applies a uniform tension, the connecting mechanism transmits rotational power to the driving component, driving the placement platform to move backward synchronously, ensuring that the detection mechanism always maintains the optimal observation position. This achieves precise matching between the stretching action and the avoidance operation, preventing real-time observation of key deformation areas from being obstructed by workpiece displacement. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a schematic diagram of the detection mechanism of the present invention;

[0024] Figure 3 This is a schematic diagram of the bidirectional threaded rod of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the connecting disk of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the fixing claw of the present invention;

[0027] Figure 6 This is a schematic diagram of the movable sleeve column of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the placement platform of the present invention;

[0029] Figure 8 This is a schematic diagram of the cylindrical gear structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the transmission shaft of the present invention;

[0031] Figure 10 This is a schematic diagram of the main camera of the present invention.

[0032] The components include: 1. Control console; 2. Testing table; 3. Clamping mechanism; 301. Connecting disc; 302. Connecting seat; 303. Arc arm; 304. Fixed claw; 305. Rotating shaft; 4. Adjustment assembly; 401. Electric push rod; 402. Movable sleeve column; 403. Movable disc; 404. Spherical connecting block one; 405. Connecting rod; 406. Spherical connecting block two; 5. Tensioning mechanism; 501. Motor one; 502. Bidirectional threaded rod; 503. Bevel gear one; 504. Moving block; 6. 7. Transmission assembly; 601. Bevel gear II; 602. One-way threaded rod; 603. Connecting frame; 7. Detection mechanism; 701. Motor II; 702. Main camera; 703. Connecting rod; 704. Secondary camera; 8. Connection mechanism; 801. Pulley I; 802. Transmission belt; 803. Pulley II; 9. Drive assembly; 901. Drive shaft; 902. Cylindrical gear; 903. Gear plate; 904. Transmission block; 10. Electric telescopic rod; 11. Torque sensor; 12. Placement platform. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see the appendix Figure 1 - Appendix Figure 2 This invention provides a tensile testing device for irregularly shaped metal parts, including a control console 1, a testing platform 2 on the rear side of the control console 1, a tensile mechanism 5 on the right side of the testing platform 2, two electric telescopic rods 10 slidably connected in the middle of the testing platform 2, a torque sensor 11 fixed at the top of the electric telescopic rods 10, a clamping mechanism 3 on one side of the electric telescopic rods 10, transmission components 6 on both the left and right sides of the testing platform 2, and a placement platform 12 slidably connected in the middle of the control console 1.

[0035] Specifically, the control console 1 integrates a touch screen and a data processor to coordinate the operation of various modules. Behind it is a testing platform 2, which is made of carbon steel frame and has good rigidity support. The two electric telescopic rods 10 in the middle of the testing platform 2 have a maximum stroke of 150mm and a thrust of 500N. The torque sensor 11 at the top of the electric telescopic rod 10 has a range of 0-2000N·m and an accuracy of ±0.3%FS to monitor the tensile torque in real time. The clamping mechanism 3 is used to fix the metal workpiece, and the tensile mechanism 5 is used to stretch the metal workpiece.

[0036] Please see the appendix Figure 4 - Appendix Figure 6The clamping mechanism 3 includes a connecting disc 301, which is installed on the side of the electric telescopic rod 10 near the placement platform 12. Multiple evenly distributed connecting seats 302 are fixedly connected to the outer circumference of the connecting disc 301. An arc-shaped arm 303 is rotatably connected inside the connecting seat 302. A rotating shaft 305 is fixed to the end of the arc-shaped arm 303 away from the connecting seat 302. A fixing claw 304 is rotatably connected to the middle of the rotating shaft 305. An adjustment component 4 is provided in the middle of the connecting disc 301.

[0037] Specifically, the clamping mechanism 3 is installed on the side of the electric telescopic rod 10 near the placement platform 12 via a connecting disc 301. Multiple connecting seats 302 are evenly distributed around the outer periphery of the connecting disc 301. Each connecting seat 302 is hinged to an arc-shaped arm 303 via a rotating shaft. The end of the arc-shaped arm 303 is fixed to a rotating shaft 305. The middle of the rotating shaft 305 is rotatably connected to an adaptive fixing claw 304, which can freely deflect around the rotating shaft 305 to fit the surface of the irregular metal part. The adjustment component 4 is used to make the multiple arc-shaped arms 303 expand or contract radially synchronously, so as to realize the adaptive clamping of the workpiece by the fixing claw 304. The clamping force is evenly distributed on the surface of the workpiece to avoid slippage or stress concentration.

[0038] Please see the appendix Figure 3 The stretching mechanism 5 includes a motor 501, which is installed on the right side of the testing table 2. A bidirectional threaded rod 502 is fixed to the output end of the motor 501. A bevel gear 503 is fixed to both the left and right ends of the bidirectional threaded rod 502. Moving blocks 504 are threaded to the outer circumference of both the left and right ends of the bidirectional threaded rod 502. A connecting mechanism 8 is provided in the middle of the bidirectional threaded rod 502.

[0039] Specifically, motor 501 has a rated speed of 2000 RPM and an output torque of 10 N·m. The output end is fixed with a bidirectional threaded rod 502 with a lead of 8 mm, made of 40Cr alloy steel. Bevel gears 503 are welded and fixed at both ends of the bidirectional threaded rod 502. The moving blocks 504 on the outer periphery of both ends of the bidirectional threaded rod 502 are threadedly connected to the bidirectional threaded rod 502. When motor 501 starts, the bidirectional threaded rod 502 rotates, driving the moving blocks 504 on both sides to move towards each other or in opposite directions.

[0040] Please see the appendix Figure 3 The transmission assembly 6 includes a second bevel gear 601, which is rotatably connected inside the testing table 2. The second bevel gear 601 meshes with a first bevel gear 503. A one-way threaded rod 602 is fixed inside the second bevel gear 601. A connecting frame 603 is threadedly connected to the outer circumference of the one-way threaded rod 602. The left and right ends of the connecting frame 603 are slidably connected to the left and right sides inside the testing table 2, respectively. The one-way threaded rod 602 is rotatably connected inside the testing table 2. A testing mechanism 7 is provided in the middle of the connecting frame 603.

[0041] Specifically, the transmission component 6 meshes with the first bevel gear 503 via the second bevel gear 601, receiving high-speed power from the first motor 501 to drive the one-way threaded rod 602 to rotate. The outer circumference of the one-way threaded rod 602 is threaded with the connecting frame 603, which slides into the guide groove of the detection table 2 at both ends to ensure vertical movement stability. When the second bevel gear 601 rotates synchronously with the first bevel gear 503, the one-way threaded rod 602 drives the connecting frame 603 to move vertically, causing the detection mechanism 7 to gradually approach the surface of the stretched metal part, capture deformation details, and combine the data from the torque sensor 11 to achieve synchronous mechanical and deformation analysis.

[0042] Please see the appendix Figure 7 - Appendix Figure 9 The connecting mechanism 8 includes a pulley 801, which is fixed in the middle of the bidirectional threaded rod 502. A pulley 803 is rotatably connected to the rear side of the inner side of the testing table 2. A transmission belt 802 is sleeved on the outer periphery of the pulley 801 and the pulley 803. A drive assembly 9 is provided on both the left and right sides of the pulley 803.

[0043] Specifically, pulley 801 is fixed in the middle of the bidirectional threaded rod 502, and power is transmitted to pulley 803 on the rear side of the test bench 2 through the transmission belt 802 made of polyurethane material, so that pulley 803 drives the drive assembly 9 to rotate.

[0044] Please see the appendix Figure 5 - Appendix Figure 6 The adjusting component 4 includes an electric push rod 401, which is fixed inside the connecting disc 301. A movable sleeve 402 is fixed to one end of the electric push rod 401 away from the connecting disc 301. A movable disc 403 is fixed to one end of the movable sleeve 402 away from the electric push rod 401. A plurality of spherical connecting blocks 404 are evenly distributed in a ring on the outer periphery of the side of the movable disc 403 near the movable sleeve 402. A connecting rod 405 is movably connected to the outer periphery of the spherical connecting blocks 404. A spherical connecting block 406 is movably connected to the inner end of the connecting rod 405 away from the spherical connecting blocks 404. The side of the spherical connecting block 406 away from the connecting rod 405 is fixed to the outer periphery of the arc-shaped arm 303. The end of the moving block 504 away from the bidirectional threaded rod 502 is fixed to the bottom of the electric telescopic rod 10.

[0045] Specifically, the electric push rod 401 is fixed inside the connecting disc 301, and its output end is connected to the movable sleeve 402. The movable sleeve 402 is fixed to the end of the movable disc 403. On the outer periphery of the movable disc 403 near the movable sleeve 402, multiple spherical connecting blocks 404 are evenly distributed in a ring. Each spherical connecting block 404 is hinged to a spherical connecting block 406 on the outer periphery of the arc arm 303 through a connecting rod 405, forming a four-bar linkage. When the electric push rod 401 extends or retracts, the movable disc 403 moves axially, pushing the spherical connecting block 406 through the connecting rod 405, driving multiple arc arms 303 to expand or contract radially synchronously, adjusting the clamping diameter of the fixed claw 304, adapting to the surface of the irregular metal part, and achieving high-precision dynamic adjustment.

[0046] Please see the appendix Figure 10 The detection mechanism 7 includes a second motor 701, which is fixed in the middle of the connecting frame 603. A main camera 702 is fixed at the output end of the second motor 701. A connecting rod 703 rotates on both the left and right sides of the main camera 702. A secondary camera 704 rotates at the end of the connecting rod 703 away from the main camera 702.

[0047] Specifically, motor 701, with a rated speed of 30 RPM and an output torque of 2 N·m, is fixed in the middle of the connecting frame 603. Its output end drives the main camera 702 to rotate around its axis. The main camera 702 has a resolution of 4096×2160 and a frame rate of 120fps. It is equipped with an adjustable focal length lens. The main camera 702 has a micro motor inside that controls the rotation of the linkage 703. The end of the linkage 703 is connected to the secondary camera 704 to form a multi-angle observation system. When motor 701 is started, the main camera 702 rotates at a low speed. The control linkage 703 rotates to adjust the shooting position of the secondary camera 704, covering the front and side of the stretched area of ​​the metal part. It captures surface cracks, deformation details and microstructure changes in real time, realizing a dynamic balance between mechanical testing and visual inspection.

[0048] Please see the appendix Figure 9 The drive assembly 9 includes a drive shaft 901, which is fixed in the middle of the pulley 803. A cylindrical gear 902 is fixed on the outer periphery of the drive shaft 901. A toothed plate 903 slides on the inner rear side of the test table 2 and meshes with the cylindrical gear 902. A transmission block 904 is fixed on the side of the toothed plate 903 near the placement table 12. The outer periphery of the transmission block 904 is slidably connected to the inner rear side of the test table 2. The end of the transmission block 904 away from the toothed plate 903 is fixed to the bottom of the placement table 12.

[0049] Specifically, the drive shaft 901 is fixed in the middle of the pulley 803, receiving the rotational power transmitted by the drive belt 802. A cylindrical gear 902 is fixed to the outer circumference of the drive shaft 901, meshing with a toothed plate 903 slidably connected to the rear side of the inside of the detection table 2, converting the rotational motion into horizontal linear motion. A transmission block 904 is welded to the side of the toothed plate 903 near the placement table 12. The transmission block 904 is slidably embedded in the rear side of the detection table 2, and the other end is fixed to the bottom of the placement table 12. When the pulley 803 rotates synchronously with the bidirectional threaded rod 502 of the tensioning mechanism 5, the cylindrical gear 902 drives the toothed plate 903 to move horizontally backward, causing the placement table 12 to retract at the same speed to avoid obstructing the camera's field of view of the detection mechanism 7.

[0050] Working principle: When inspecting irregularly shaped metal parts, the metal part is first placed on the front top of the placement platform 12. Then, the electric telescopic rod 10 is activated, causing the connecting disc 301 to move towards the placement platform 12. After that, the connecting disc 301 is activated, causing the electric push rod 401 to control the movement of the movable sleeve 402. When the movable sleeve 402 moves, the movable disc 403 connected to the other end of the movable sleeve 402 will move together with the movable sleeve 402. During the movement of the movable disc 403, the distance between the first spherical connecting block 404 and the second spherical connecting block 406 changes. Thus, the spherical connecting block 1 404 and the spherical connecting block 2 406 move accordingly, causing the arc arm 303 to gradually expand outward. Then, the electric telescopic rod 10 moves the connecting disc 301 forward again. After ensuring that the metal part can be clamped, the electric push rod 401 can be activated again, causing the electric push rod 401 to drive the movable sleeve 402 to move towards the connecting disc 301. At this time, the multiple arc arms 303 retract, the fixed claw 304 gradually contacts the irregular metal part, and will rotate adaptively around the rotating shaft 305, closely fitting the complex curved surface of the irregular metal part to achieve slip-free clamping.

[0051] After clamping the metal part, motor 501 can be started. Motor 501 controls the rotation of the bidirectional threaded rod 502. At this time, the bevel gears 503 at both ends of the bidirectional threaded rod 502 will rotate together with the bidirectional threaded rod 502. During the rotation of the bidirectional threaded rod 502, the moving block 504 on the outer periphery of the bidirectional threaded rod 502 will drive the electric telescopic rod 10 to move along the axis of the bidirectional threaded rod 502. At this time, the two electric telescopic rods 10 move in opposite directions, which means that a tensile force is applied to the metal workpiece from the left and right sides to perform tensile testing.

[0052] As the bidirectional threaded rod 502 rotates, the pulley 801 in the middle of the bidirectional threaded rod 502 rotates accordingly. The rotational motion of the pulley 801 is transmitted to the pulley 803 via the transmission belt 802, causing the pulley 803 to drive the transmission shaft 901 to rotate. The outer circumference of the transmission shaft 901 is fixed to the cylindrical gear 902. Through motion transmission, the cylindrical gear 902 will rotate further. Since the cylindrical gear 902 and the toothed plate 903 are meshed, when the cylindrical gear 902 rotates, the toothed plate 903 will move horizontally backward in the opposite direction of the rotation of the cylindrical gear 902. At this time, the placement platform 12 connected to the top of the toothed plate 903 through the transmission block 904 will move backward with the cylindrical gear 902 accordingly to avoid obstructing the camera's field of view, thus facilitating the observation of the stretched metal workpiece by the main camera 702 and the auxiliary camera 704.

[0053] Because bevel gear 601 meshes with bevel gear 503, bevel gear 503 drives bevel gear 601 to rotate synchronously while the bidirectional threaded rod 502 rotates. Through the meshing transmission between bevel gear 503 and bevel gear 601, the unidirectional threaded rod 602 rotates synchronously when the bidirectional threaded rod 502 rotates. At this time, the connecting bracket 603 of the threaded connection on the outer circumference of the unidirectional threaded rod 602 will move vertically downward along the unidirectional threaded rod 602. When the connecting bracket 603 moves downward, motor 701 drives the main camera. The camera 702 gradually approaches the metal part, so that it can take pictures and record the key stretching parts of the metal part in a timely manner when stretching the metal part. By starting the second motor 701, the main camera 702 is rotated. After the main camera 702 has rotated 90 degrees, the operation of the second motor 701 can be stopped. At this time, the auxiliary camera 704 is rotated through the two connecting rods 703, so that the auxiliary camera 704 can take pictures and record the surface of the metal workpiece, thereby achieving multi-view recording of tensile deformation, crack propagation and microstructure changes.

[0054] After the tensile data is recorded, the testing equipment can be restored, the metal parts removed, and the next experiment can be conducted.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A profiled metal piece tensile testing apparatus comprising a control console (1), characterized in that, The rear side of the control console (1) is provided with a detection table (2), the right side of the detection table (2) is provided with a stretching mechanism (5), the middle part of the detection table (2) is slidably connected with two electric telescopic rods (10), the top of the electric telescopic rod (10) is fixedly provided with a torque sensor (11), one side of the electric telescopic rod (10) is provided with a clamping mechanism (3), the left and right sides of the detection table (2) are provided with transmission assemblies (6), and the middle part of the control console (1) is slidably connected with a placing table (12); The clamping mechanism (3) comprises a connecting disc (301), the connecting disc (301) is installed on one side of the electric telescopic rod (10) close to the placing table (12), a plurality of uniformly distributed connecting seats (302) are fixedly connected in a circle on the outer periphery of the connecting disc (301), arc-shaped arms (303) are rotatably connected in the connecting seats (302), the end, away from the connecting seat (302), of the arc-shaped arm (303) is fixedly connected with a rotating shaft (305), a fixed claw (304) is rotatably connected to the middle part of the rotating shaft (305), and the middle part of the connecting disc (301) is provided with an adjusting assembly (4); the adjusting assembly (4) is used for synchronously expanding or contracting the plurality of arc-shaped arms (303) in a radial direction, so that the fixed claw (304) can adaptively clamp the metal piece; The stretching mechanism (5) comprises a motor (501), the motor (501) is installed on the right side of the detection table (2), the output end of the motor (501) is fixedly connected with a bidirectional threaded rod (502), the left and right ends of the bidirectional threaded rod (502) are fixedly connected with bevel gears (503), the left and right ends of the bidirectional threaded rod (502) are threadedly connected with moving blocks (504) in the outer periphery, and the middle part of the bidirectional threaded rod (502) is provided with a connecting mechanism (8); The connecting mechanism (8) comprises a belt pulley (801), the belt pulley (801) is fixed in the middle part of the bidirectional threaded rod (502), the inner rear side of the detection table (2) is rotatably connected with a belt pulley (803), the outer periphery of the belt pulley (801) and the belt pulley (803) is sleeved with a transmission belt (802), and the left and right sides of the belt pulley (803) are provided with drive assemblies (9); The drive assembly (9) comprises a transmission shaft (901), the transmission shaft (901) is fixed in the middle part of the belt pulley (803), the outer periphery of the transmission shaft (901) is fixedly connected with a cylindrical gear (902), the inner rear side of the detection table (2) is slidably provided with a toothed plate (903), the toothed plate (903) is meshed with the cylindrical gear (902), one side of the toothed plate (903) close to the placing table (12) is fixedly connected with a transmission block (904), and one end, away from the toothed plate (903), of the transmission block (904) is fixedly connected to the bottom of the placing table (12). The transmission assembly (6) comprises a bevel gear two (601), the bevel gear two (601) is rotatably connected in the inside of the detection table (2), the bevel gear two (601) is engaged with the bevel gear one (503), the inside of the bevel gear two (601) is fixed with a one-way threaded rod (602), the outer periphery of the one-way threaded rod (602) is threadedly connected with a connecting frame (603), the middle part of the connecting frame (603) is provided with a detection mechanism (7). The metal piece is placed on the front end top of the placing table (12), the electric telescopic rod (10) drives the connecting disc (301) to move to the placing table (12) and clamps the metal piece, the motor one (501) controls the rotation of the bidirectional threaded rod (502), the moving block (504) drives the electric telescopic rod (10) to move for stretching detection along the axis of the bidirectional threaded rod (502), and the top of the toothed plate (903) connected with the placing table (12) through the transmission block (904) will be correspondingly moved backward with the cylindrical gear (902), so that the camera field of view of the detection mechanism (7) is avoided.

2. A profiled metal member tensile testing apparatus according to claim 1, wherein, The adjusting assembly (4) comprises an electric push rod (401), the electric push rod (401) is fixed in the inside of the connecting disc (301), one end of the electric push rod (401) away from the connecting disc (301) is fixed with a movable sleeve column (402), one end of the movable sleeve column (402) away from the electric push rod (401) is fixed with a movable disc (403), a plurality of annularly and uniformly distributed spherical connecting blocks one (404) are fixed on the outer periphery of one side of the movable disc (403) close to the movable sleeve column (402), the outer periphery of the spherical connecting blocks one (404) is movably connected with a connecting rod (405), and one end of the connecting rod (405) away from the spherical connecting blocks one (404) is movably connected with spherical connecting blocks two (406) in the inside.

3. A profiled metal member tensile testing apparatus according to claim 1, wherein, The detection mechanism (7) comprises a motor two (701), the motor two (701) is fixed in the middle part of the connecting frame (603), the output end of the motor two (701) is fixed with a main camera (702), the left and right sides of the main camera (702) are rotatably provided with connecting rods (703), and one end of the connecting rods (703) away from the main camera (702) is rotatably provided with a sub-camera (704).

4. A profiled metal member tensile testing apparatus according to claim 2, wherein, The spherical connecting blocks two (406) away from the connecting rod (405) are fixed on the outer periphery of the arc-shaped arm (303), and one end of the moving block (504) away from the bidirectional threaded rod (502) is fixed on the bottom of the electric telescopic rod (10).

5. A profiled metal member tensile testing apparatus according to claim 1, wherein, The left and right ends of the connecting frame (603) are slidably connected in the inside of the left and right sides of the detection table (2), and the one-way threaded rod (602) is rotatably connected in the inside of the detection table (2).

6. A profiled metal member tensile testing apparatus according to claim 1, wherein, The outer periphery of the transmission block (904) is slidably connected in the inside of the rear side of the detection table (2).

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