Steel anti-bending testing machine

Abstract

The utility model relates to the technical field of steel testing, in particular to a steel anti-bending testing machine. The device comprises a supporting seat, a lifting structure is arranged on one side of the supporting seat, a protective shell is fixed to one side of the lifting structure, a pi-shaped plate is fixed to the top of the supporting seat, a second connecting block is fixed to the top of one side of the pi-shaped plate, and a hydraulic cylinder is fixed to the bottom of the second connecting block. According to the steel anti-bending testing machine provided by the utility model, through the design of the lifting structure, the protective shell can be conveniently operated to do lifting motion, and an experimenter only needs to observe the condition through the protective shell in the experiment process, so that the safety of the experimenter is favorably protected; through the design of the heating structure, the device can simulate the working states of the reinforcing steel bar at different temperatures, so that diversified test requirements are met, which is crucial for evaluating the performance of the reinforcing steel bar under different environmental conditions, and the actual use performance of the reinforcing steel bar can be known more comprehensively.

Description

Technical Field

[0001] The utility model relates to the technical field of steel material testing, in particular to a steel material reverse bending testing machine. Background Art

[0002] As modern construction and industrial manufacturing continue to increase their requirements for steel quality, ensuring the stable performance of steel under complex stress conditions has become critical. Traditional testing methods have problems such as insufficient accuracy and complex operation when obtaining bending performance data, making it difficult to meet current technical requirements. Therefore, it is particularly important to develop a testing device that can accurately and efficiently perform steel bending tests. This testing machine is designed according to the latest national standards and uses advanced mechanical transmission and control systems to achieve repeated bending tests of steel at different angles, providing reliable data support for evaluating steel bending performance.

[0003] For example, a Chinese utility model patent (CN217277572U) discloses a steel reverse bending tester, which solves the following problem: current steel reverse bending testers mostly use manual placement during the test piece placement process, and it is difficult to place the steel test piece in the center during placement, so that during the experiment, the steel test piece is easy to break away from the limiting structure and jump out, thus posing certain safety hazards.

[0004] The device includes a base, and rotating U-shaped seats are symmetrically connected on both sides of the base for rotation. Cylinders are symmetrically provided on both sides between the two groups of rotating U-shaped seats. The outer sides of the two groups of cylinders are fixedly connected to support plates, and the support plates are fixedly connected to the base. The output ends of the two groups of cylinders are fixedly connected to push heads. The present application arranges different-direction screws, centering plates and stepper motors so that the stepper motor drives the centering plates on both sides to move relative to each other through the different-direction screws when starting work, thereby pushing the rotating U-shaped seat to the center, thereby effectively reducing the probability that the steel specimen is not placed in the center, causing the steel specimen to easily fall out of the inside of the rotating U-shaped seat during the bending process, and effectively improving the safety of the experimental process.

[0005] When using the above technology, we found the following technical problems in the existing technology: the national and industry steel testing standards clearly stipulate the requirements for reverse bending tests of steel bars at specific temperatures. The device does not have an ignition structure to increase the temperature of the steel bars, and cannot execute the test procedures specified in such standards, which is not conducive to the research and development and application of new technologies. To this end, we designed a steel reverse bending testing machine to provide another technical solution to the above technical problems. Utility Model Content

[0006] Based on this, it is necessary to provide a steel bending test machine to address the above technical issues and solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A steel reverse bending testing machine includes a support base, a lifting structure is provided on one side of the support base, a protective shell is fixed to one side of the lifting structure, a π-shaped plate is fixed to the top of the support base, a second connecting block is fixed to the top of one side of the π-shaped plate, a hydraulic cylinder is fixed to the bottom of the second connecting block, a punching head is fixed to the output end of the hydraulic cylinder, a heating structure is provided on the inner side of the π-shaped plate, clamping structures are provided at both ends of one side of the π-shaped plate, pressure sensors are provided on one side of the two clamping structures, and a temperature measuring structure is provided near the midpoint of the top of the support base.

[0009] As a preferred embodiment of the steel reverse bending testing machine provided by the present invention, the lifting structure includes a first motor, a first bevel gear, a second bevel gear and a screw. The first motor is fixed to one side of the top of the support seat, and the output end of the first motor is fixed to the first bevel gear. The screw is rotatably connected to one side of the top of the support seat, and the second bevel gear is fixed to the bottom end of the outer side of the screw. The second bevel gear and the first bevel gear are meshed and connected.

[0010] As a preferred embodiment of the steel reverse bending testing machine provided by the present invention, the lifting structure also includes a screw sleeve, a first slider, a guide column and a first connecting block. The outer side of the screw is threadedly connected to the screw sleeve, the lower end of one side of the screw sleeve is fixed with the first slider, the one side of the top of the support seat is fixed with a guide column, the guide column and the first slider are slidably connected, the top of the screw sleeve is fixed with a first connecting block, and one side of the first connecting block is fixed to the protective shell.

[0011] As a preferred embodiment of the steel reverse bending testing machine provided by the present invention, the heating structure includes a second motor, a screw rod, a slide rod, a mounting plate and a lighter. The second motor is fixed to one side of the π-shaped plate, the output end of the second motor is fixed to the screw rod, the inner side of the π-shaped plate is fixed to the slide rod, the outer side of the screw rod is threadedly connected to the mounting plate, the mounting plate and the slide rod are slidably connected, and a lighter is fixed to one end of the mounting plate.

[0012] As a preferred embodiment of the steel reverse bending testing machine provided by the present invention, the clamping structure includes a rotating column, a clamping block, a third connecting block, a rotating rod, a clamping wheel and a locking mechanism, both sides of one end of the π-shaped plate are rotatably connected to the rotating column, one side of the two rotating columns is fixed with a clamping block, one side of the clamping block is fixed to the pressure sensor, and the two ends of the top of the clamping block are fixed with a third connecting block, the inner sides of the two third connecting blocks are rotatably connected to the rotating rod, and the outer side of the rotating rod is fixed with a clamping wheel, the connection point between the clamping wheel and the rotating rod deviates from the center of the clamping wheel, and a locking mechanism is provided on one side of one of the third connecting blocks.

[0013] As a preferred embodiment of the steel reverse bending testing machine provided by the present invention, the locking mechanism includes a fixed block, a third motor, a worm and a worm wheel, wherein fixed blocks are fixed at both ends of one side of the third connecting block, and the sides of the two fixed blocks close to each other are rotatably connected with a worm, a third motor is fixed on one side of one of the fixed blocks, the output end of the third motor and the worm are fixed, a worm wheel is fixed at one end outside the rotating rod, and the worm wheel and the worm are meshingly connected.

[0014] As a preferred embodiment of the steel reverse bending testing machine provided by the present invention, the temperature measuring structure includes a concave plate, a fourth motor, a cam, an infrared thermometer and a second slider. A concave plate is fixed to the top of the support seat near the lower end of the punching head, a fourth motor is fixed to one side of the concave plate, and a cam is fixed to the output end of the fourth motor. The cam and the concave plate are rotatably connected, and the two ends of the inner side of the concave plate are slidably connected to the second slider, and an infrared thermometer is fixed on the side where the two second sliders are close to each other, and the cam and the infrared thermometer are slidably connected.

[0015] It can be seen without a doubt that the above-mentioned technical solution of this application can definitely solve the technical problem to be solved by this application.

[0016] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects:

[0017] The utility model provides a steel bending tester. The device is designed with a lifting structure, which makes it easy to operate the protective shell to perform lifting movements. During the experiment, the experimenter only needs to observe the situation through the protective shell, which is conducive to protecting the safety of the experimenter.

[0018] The device's heating structure is designed to simulate the working conditions of steel bars at different temperatures, thus meeting diverse testing needs. This is crucial for evaluating the performance of steel bars under different environmental conditions and helps to gain a more comprehensive understanding of their actual performance.

[0019] The clamping structure of the device enables it to stably fix the steel bar and prevent the steel bar from sliding or deflecting during the test. This helps to ensure that parameters such as the bending angle and deformation of the steel bar are accurate and reliable during the test, thereby improving the accuracy of the test results.

[0020] The device's temperature measurement structure allows users to monitor the temperature changes of steel bars during heating in real time, ensuring that the steel bars reach the predetermined test temperature. This is crucial for tests that require specific temperature conditions, as temperature is one of the key factors affecting the mechanical properties of steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of a steel reverse bending testing machine of the present utility model;

[0023] Figure 2 This is a side view of a steel reverse bending testing machine of the present utility model;

[0024] Figure 3 This is a diagram showing the lifting of a protective shell of a steel reverse bending test machine according to the present invention;

[0025] Figure 4 This is a schematic diagram of the connection between the screw and the sleeve of a steel reverse bending test machine of the present invention;

[0026] Figure 5 This is a schematic diagram of the connection between the hydraulic cylinder and the punch head of a steel reverse bending testing machine of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection between the screw rod and the mounting plate of a steel reverse bending test machine of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection between the clamp block and the pressure sensor of a steel reverse bending test machine of the present invention;

[0029] Figure 8 This is a schematic diagram of the connection between the worm and worm wheel of a steel reverse bending testing machine of the present invention;

[0030] Figure 9 This is a schematic diagram of a pressure sensor for a steel reverse bending testing machine according to the present invention;

[0031] Figure 10 This is a schematic diagram of the connection between the concave plate and the fourth motor of a steel reverse bending testing machine of the present invention.

[0032] In the figure: 1. support base; 2. protective shell; 3. first motor; 4. first bevel gear; 5. second bevel gear; 6. screw; 7. screw sleeve; 8. first slider; 9. guide column; 10. first connecting block; 11. π-shaped plate; 12. second connecting block; 13. hydraulic cylinder; 14. punch head; 15. second motor; 16. screw; 17. slide bar; 18. mounting plate; 19. lighter; 20. rotating column; 21. clamping block; 22. third connecting block; 23. fixing block; 24. third motor; 25. worm; 26. worm gear; 27. rotating rod; 28. clamping wheel; 29. pressure sensor; 30. concave plate; 31. fourth motor; 32. cam; 33. infrared thermometer; 34. second slider. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] As described in the background art, national and industry steel testing standards clearly stipulate the requirements for reverse bending tests of steel bars at specific temperatures. This device does not have an ignition structure to increase the temperature of the steel bars, and is unable to execute the test procedures specified in such standards, which is not conducive to the research and development and application of new technologies.

[0035] In order to solve this technical problem, the utility model provides a steel material reverse bending testing machine.

[0036] Specifically, please refer to Figures 1-10 A steel reverse bending testing machine specifically includes: a support base 1, a lifting structure is provided on one side of the support base 1, a protective shell 2 is fixed on one side of the lifting structure, a π-shaped plate 11 is fixed on the top of the support base 1, a second connecting block 12 is fixed on the top of one side of the π-shaped plate 11, a hydraulic cylinder 13 is fixed on the bottom of the second connecting block 12, a punching head 14 is fixed on the output end of the hydraulic cylinder 13, a heating structure is provided on the inner side of the π-shaped plate 11, clamping structures are provided at both ends of one side of the π-shaped plate 11, pressure sensors 29 are provided on one side of the two clamping structures, and a temperature measuring structure is provided near the midpoint of the top of the support base 1.

[0037] The utility model provides a steel bending tester. The device is designed with a lifting structure, which makes it easy to operate the protective shell 2 to perform lifting and lowering movements. During the experiment, the experimenter only needs to observe the situation through the protective shell 2, which is conducive to protecting the safety of the experimenter.

[0038] The device's heating structure is designed to simulate the working conditions of steel bars at different temperatures, thus meeting diverse testing needs. This is crucial for evaluating the performance of steel bars under different environmental conditions and helps to gain a more comprehensive understanding of their actual performance.

[0039] The clamping structure of the device enables it to stably fix the steel bar and prevent the steel bar from sliding or deflecting during the test. This helps to ensure that parameters such as the bending angle and deformation of the steel bar are accurate and reliable during the test, thereby improving the accuracy of the test results.

[0040] The device's temperature measurement structure allows users to monitor the temperature changes of steel bars during heating in real time, ensuring that the steel bars reach the predetermined test temperature. This is crucial for tests that require specific temperature conditions, as temperature is one of the key factors affecting the mechanical properties of steel.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0043] Reference Figures 1-10 A steel reverse bending testing machine includes a support base 1, a lifting structure is provided on one side of the support base 1, a protective shell 2 is fixed on one side of the lifting structure, a π-shaped plate 11 is fixed on the top of the support base 1, a second connecting block 12 is fixed on the top of one side of the π-shaped plate 11, a hydraulic cylinder 13 is fixed on the bottom of the second connecting block 12, a punching head 14 is fixed on the output end of the hydraulic cylinder 13, a heating structure is provided on the inner side of the π-shaped plate 11, clamping structures are provided at both ends of one side of the π-shaped plate 11, pressure sensors 29 are provided on one side of the two clamping structures, and a temperature measuring structure is provided near the midpoint of the top of the support base 1.

[0044] The lifting structure includes a first motor 3, a first bevel gear 4, a second bevel gear 5, a screw 6, a screw sleeve 7, a first slider 8, a guide column 9 and a first connecting block 10. The first motor 3 is fixed to one side of the top of the support base 1, and the output end of the first motor 3 is fixed to the first bevel gear 4. The screw 6 is rotatably connected to one side of the top of the support base 1, and the second bevel gear 5 is fixed to the bottom end of the outer side of the screw 6. The second bevel gear 5 and the first bevel gear 4 are meshed and connected. The outer side of the screw 6 is threadedly connected to the screw sleeve 7, and the lower end of one side of the screw sleeve 7 is fixed with a first slider 8. A guide column 9 is fixed to one side of the top of the support base 1, and the guide column 9 and the first slider 8 are slidably connected. The top of the screw sleeve 7 is fixed with a first connecting block 10, and one side of the first connecting block 10 is fixed to the protective shell 2, so that the lifting structure can drive the protective shell 2 to rise and fall.

[0045] The heating structure includes a second motor 15, a screw rod 16, a slide rod 17, a mounting plate 18 and a lighter 19. The second motor 15 is fixed to one side of the π-shaped plate 11, and the output end of the second motor 15 is fixed to the screw rod 16. The slide rod 17 is fixed to the inner side of the π-shaped plate 11. The outer side of the screw rod 16 is threadedly connected to the mounting plate 18. The mounting plate 18 and the slide rod 17 are slidably connected. A lighter 19 is fixed to one end of the mounting plate 18, so that the heating structure can heat the steel bars.

[0046] The clamping structure includes a rotating column 20, a clamping block 21, a third connecting block 22, a rotating rod 27, a clamping wheel 28 and a locking mechanism. The rotating columns 20 are rotatably connected to both sides of one end of the π-shaped plate 11. A clamping block 21 is fixed on one side of the two rotating columns 20. One side of the clamping block 21 is fixed to the pressure sensor 29. The third connecting blocks 22 are fixed on both ends of the top of the clamping block 21. The inner sides of the two third connecting blocks 22 are rotatably connected to the rotating rod 27. The outer side of the rotating rod 27 is fixed with a clamping wheel 28. The connection point between the clamping wheel 28 and the rotating rod 27 deviates from the center of the clamping wheel 28. A locking mechanism is provided on one side of one of the third connecting blocks 22, so that the clamping structure can clamp the steel bars.

[0047] The locking mechanism includes a fixed block 23, a third motor 24, a worm 25 and a worm gear 26. Fixed blocks 23 are fixed at both ends of one side of one of the third connecting blocks 22. The side where the two fixed blocks 23 are close to each other is rotatably connected with the worm 25. A third motor 24 is fixed on one side of one of the fixed blocks 23. The output end of the third motor 24 is fixed to the worm 25. A worm gear 26 is fixed to one end of the outer side of the rotating rod 27. The worm gear 26 and the worm 25 are meshed and connected, so that the locking mechanism can drive the rotating rod 27 to rotate.

[0048] The temperature measuring structure includes a concave plate 30, a fourth motor 31, a cam 32, an infrared thermometer 33 and a second slider 34. A concave plate 30 is fixed to the lower end of the top of the support seat 1 near the punching head 14, and a fourth motor 31 is fixed to one side of the concave plate 30. The output end of the fourth motor 31 is fixed to the cam 32. The cam 32 and the concave plate 30 are rotatably connected. The two ends of the inner side of the concave plate 30 are slidably connected to the second slider 34. The infrared thermometer 33 is fixed on the side where the two second sliders 34 are close to each other. The cam 32 and the infrared thermometer 33 are slidably connected, so that the temperature measuring structure can detect the temperature of the steel bars.

[0049] A rectangular hole is opened on one side of the protective shell 2, and a protective glass is provided inside the rectangular hole, so that the device can protect the user.

[0050] A V-shaped groove is formed on the top of the clamping block 21 , and the sensing end of the pressure sensor 29 is arranged inside the V-shaped groove, thereby enabling the pressure sensor 29 to detect the test force.

[0051] A display screen operator is provided on one side of the protective shell 2, and the user can control the device through the display screen operator.

[0052] The test specification of this utility model is based on the national standard ISO-7438.

[0053] The utility model provides a steel bending tester. The device is designed with a lifting structure, which makes it easy to operate the protective shell 2 to perform lifting and lowering movements. During the experiment, the experimenter only needs to observe the situation through the protective shell 2, which is conducive to protecting the safety of the experimenter.

[0054] The device's heating structure is designed to simulate the working conditions of steel bars at different temperatures, thus meeting diverse testing needs. This is crucial for evaluating the performance of steel bars under different environmental conditions and helps to gain a more comprehensive understanding of their actual performance.

[0055] The clamping structure of the device enables it to stably fix the steel bar and prevent the steel bar from sliding or deflecting during the test. This helps to ensure that parameters such as the bending angle and deformation of the steel bar are accurate and reliable during the test, thereby improving the accuracy of the test results.

[0056] The device's temperature measurement structure allows users to monitor the temperature changes of steel bars during heating in real time, ensuring that the steel bars reach the predetermined test temperature. This is crucial for tests that require specific temperature conditions, as temperature is one of the key factors affecting the mechanical properties of steel.

[0057] The use process of the steel material reverse bending tester provided by the present invention is as follows: the user turns on the first motor 3 to rotate, and the output end of the first motor 3 drives the first bevel gear 4 to rotate. Since one side of the first bevel gear 4 is meshedly connected with the second bevel gear 5, the rotation of the first bevel gear 4 drives the second bevel gear 5 to rotate, and then drives the screw 6 to rotate. Since the outer side of the screw 6 is threadedly connected with the screw sleeve 7, the rotation of the screw 6 drives the screw sleeve 7 to rise and fall on one side of the guide column 9. The rise and fall of the screw sleeve 7 drives the first connecting block 10 to rise and fall, and then drives the retaining rod 6 to rotate. The protective shell 2 is raised and lowered, and the user inserts the steel bar into the inner side of the two clamping blocks 21, and then energizes and rotates the third motor 24. The output end of the third motor 24 drives the worm 25 to rotate. Since the top of the worm 25 is engaged with the worm gear 26, the rotation of the worm 25 drives the worm gear 26 to rotate, and then drives the rotating rod 27 and the clamping wheel 28 to rotate, so that the clamping wheel 28 can tightly clamp the steel bar. At this time, the user observes the data of the pressure sensor 29 and makes a record. According to the experimental requirements, the user ignites the lighter 19 to heat the steel bar, and then uses the second The motor 15 is energized and rotated, and the output end of the second motor 15 drives the screw rod 16 to rotate. Since the outer side of the screw rod 16 is threadedly connected to the mounting plate 18, the rotation of the screw rod 16 drives the mounting plate 18 to slide along the outer side of the slide rod 17, so that the lighter 19 can evenly heat the steel bar. The user energizes the infrared thermometer 33 to measure the infrared temperature of the steel bar. The user energizes the fourth motor 31 and rotates it. The output end of the fourth motor 31 drives the cam 32 to rotate, thereby driving the infrared thermometer 33 to move upward, ensuring the measurement accuracy of the infrared thermometer 33. After reaching the temperature required by the experiment, the user energizes the hydraulic cylinder 13. The output end of the hydraulic cylinder 13 drives the punch head 14 to move, thereby driving the punch head 14 to extrude the steel bar. After the steel bar is extruded and deformed, the user observes the data of the pressure sensor 29, compares it with the initial data, and then obtains specific test data. In summary, the utility model has significant advantages in improving test accuracy, enhancing test flexibility, improving test efficiency, ensuring test safety, and supporting data analysis and research. These advantages make this type of testing machine have broad application prospects and important practical value in the field of steel testing and evaluation.

[0058] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel material bending tester, comprising a support base (1), characterized in that: A lifting structure is provided on one side of the support seat (1), a protective shell (2) is fixed on one side of the lifting structure, a π-shaped plate (11) is fixed on the top of the support seat (1), a second connecting block (12) is fixed on the top of one side of the π-shaped plate (11), a hydraulic cylinder (13) is fixed on the bottom of the second connecting block (12), a punching head (14) is fixed on the output end of the hydraulic cylinder (13), a heating structure is provided on the inner side of the π-shaped plate (11), clamping structures are provided at both ends of one side of the π-shaped plate (11), and pressure sensors (29) are provided on one side of the two clamping structures, and a temperature measuring structure is provided near the midpoint of the top of the support seat (1).

2. A steel material reverse bending testing machine according to claim 1, characterized in that: The lifting structure comprises a first motor (3), a first bevel gear (4), a second bevel gear (5) and a screw (6); the first motor (3) is fixed to one side of the top of the support seat (1); the first bevel gear (4) is fixed to the output end of the first motor (3); the screw (6) is rotatably connected to one side of the top of the support seat (1); the second bevel gear (5) is fixed to the bottom end of the outer side of the screw (6); and the second bevel gear (5) and the first bevel gear (4) are meshed and connected.

3. A steel material reverse bending testing machine according to claim 2, characterized in that: The lifting structure further comprises a screw sleeve (7), a first slider (8), a guide column (9) and a first connecting block (10); the outer side of the screw rod (6) is threadedly connected to the screw sleeve (7); the lower end of one side of the screw sleeve (7) is fixed with the first slider (8); a guide column (9) is fixed to one side of the top of the support seat (1); the guide column (9) and the first slider (8) are slidably connected; the top of the screw sleeve (7) is fixed with the first connecting block (10); and one side of the first connecting block (10) is fixed to the protective shell (2).

4. A steel material reverse bending testing machine according to claim 3, characterized in that: The heating structure comprises a second motor (15), a screw rod (16), a slide rod (17), a mounting plate (18) and a lighter (19); the second motor (15) is fixed to one side of the π-shaped plate (11); the screw rod (16) is fixed to the output end of the second motor (15); the slide rod (17) is fixed to the inner side of the π-shaped plate (11); the outer side of the screw rod (16) is threadedly connected to the mounting plate (18); the mounting plate (18) and the slide rod (17) are slidably connected; and the lighter (19) is fixed to one end of the mounting plate (18).

5. The steel material reverse bending testing machine according to claim 4, characterized in that: The clamping structure comprises a rotating column (20), a clamping block (21), a third connecting block (22), a rotating rod (27), a clamping wheel (28) and a locking mechanism. The two sides of one end of the π-shaped plate (11) are rotatably connected to the rotating column (20), one side of the two rotating columns (20) is fixed with a clamping block (21), one side of the clamping block (21) is fixed to a pressure sensor (29), and the two ends of the top of the clamping block (21) are fixed with a third connecting block (22), the inner sides of the two third connecting blocks (22) are rotatably connected to the rotating rod (27), the outer side of the rotating rod (27) is fixed with a clamping wheel (28), the connection point of the clamping wheel (28) and the rotating rod (27) deviates from the center of the clamping wheel (28), and a locking mechanism is provided on one side of one of the third connecting blocks (22).

6. The steel material reverse bending testing machine according to claim 5, characterized in that: The locking mechanism comprises a fixed block (23), a third motor (24), a worm (25) and a worm wheel (26), wherein both ends of one side of one of the third connecting blocks (22) are fixed with fixed blocks (23), and the sides of the two fixed blocks (23) close to each other are rotatably connected with the worm wheel (25), and a third motor (24) is fixed on one side of one of the fixed blocks (23), and the output end of the third motor (24) is fixed to the worm wheel (25), and a worm wheel (26) is fixed on one end outside the rotating rod (27), and the worm wheel (26) and the worm wheel (25) are meshed and connected.

7. The steel material reverse bending testing machine according to claim 6, characterized in that: The temperature measuring structure comprises a concave plate (30), a fourth motor (31), a cam (32), an infrared thermometer (33) and a second slider (34); a concave plate (30) is fixed to the top of the support seat (1) near the lower end of the punching head (14); a fourth motor (31) is fixed to one side of the concave plate (30); a cam (32) is fixed to the output end of the fourth motor (31); the cam (32) and the concave plate (30) are rotatably connected; the second sliders (34) are slidably connected to both ends of the inner side of the concave plate (30); an infrared thermometer (33) is fixed to the side where the two second sliders (34) are close to each other; and the cam (32) and the infrared thermometer (33) are slidably connected.

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