Endurance test device for metal structural member

Abstract

The utility model provides an endurance test device for a metal structural member, which relates to the technical field of automobile test equipment and comprises a cushion table, a rotary adjusting disc and a test board, support rods are welded on the front and back surfaces of two sides of the top of the cushion table, a top table is welded on the tops of the support rods, and an overhead cylinder member is mounted in the middle of the bottom end of the top table. The bottom of the overhead cylinder piece is connected with a lifting top plate, the middle part of the bottom end of the lifting top plate is connected with a test plate surface in a clamping manner, and the lifting top plate is connected with the supporting rods on the two sides in a sliding manner. The adjusting disc is rotated to drive the workpiece to pass through different detection positions in sequence, and efficient continuous detection is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile testing equipment, in particular to a durability testing device for metal structural parts. Background Art

[0002] Metal materials play an important role in automobile manufacturing and are widely used in automobile structural parts, engine components, body exteriors, and interiors. Among them, automobile structural parts are key components that constitute the overall structure of the automobile and need to have sufficient strength and rigidity. Metal materials are widely used in the manufacture of automobile structural parts due to their excellent mechanical properties. For example, steel, as an economical and practical metal material, is widely used in the manufacture of structural parts such as automobile frames, body frames, doors, and roofs. In addition, aluminum alloy materials are widely used in key components such as suspension systems, braking systems, and transmission systems in automobile manufacturing due to their light weight and high strength, improving the overall performance of the automobile.

[0003] Because automotive structural components are crucial to the safety of drivers and passengers, numerous tests are conducted on these metal components. Durability testing of these components is essential equipment in automotive plant laboratories. During these tests, each component undergoes a durability analysis, with compliance determined based on national or company standards. Durability analysis of automotive structural components primarily encompasses three key engineering analysis areas: stiffness analysis, strength analysis, and fatigue analysis. These analyses play a crucial role in ensuring vehicle performance, safety, and durability.

[0004] Existing testing equipment can effectively test automotive metal structural parts, but the following problems may arise during actual use: 1. Existing metal structural part durability testing equipment often has relatively single functions and cannot simultaneously meet the comprehensive testing requirements for various aspects of automotive structural parts, such as stiffness, strength, and fatigue. For example, some testing equipment can only perform single strength tests or fatigue tests on specific metal structural parts, and cannot complete a comprehensive durability analysis of automotive structural parts in sequence on the same equipment, resulting in a cumbersome testing process that consumes a lot of time and manpower costs; 2. Traditional testing equipment has deficiencies in detection accuracy and automation. For durability testing of automotive structural parts, accurate test results are crucial. However, existing equipment may have unstable clamping when clamping metal structural parts, affecting the accuracy of the test results. At the same time, some testing equipment relies on manual operation to start the testing process, which is prone to errors. The low degree of automation makes it impossible to achieve efficient continuous testing. Therefore, a metal structural part durability testing device is needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a metal structural member durability testing device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a metal structural durability testing device, including a pad, a rotary adjustment disk and a test plate surface, the front and back sides of the top of the pad are welded with support rods, the top of the support rod is welded with a top platform, the middle of the bottom end of the top platform is installed with an overhead cylinder part, the bottom of the overhead cylinder part is connected to a lifting top plate, the middle of the bottom end of the lifting top plate is clamped with a test plate surface, and the lifting top plate and the support rods on both sides are slidably connected.

[0007] Preferably, a bottom cylinder is installed in the middle of the top of the pad, and a lifting base is installed on the top of the bottom cylinder. The lifting base is slidably connected to the support rods on both sides, and the middle of the support rods on both sides are embedded with limit plates.

[0008] Preferably, grooves are provided on both sides of the bottom and the front of the test board surface, and inductive proximity switches are installed on both sides of the bottom and one side of the grooves on the front of the test board surface. A connector is installed in the groove on the front of the bottom of the test board surface, and the bottom end of the connector is threadedly connected to a lower pressure plate.

[0009] Preferably, adjusting screw rods are provided on both sides of the slot on one side of the bottom of the test plate surface, and the external thread of the adjusting screw rod is connected with an adjusting block, and the adjusting block is slidably connected to the internal part of the slot on one side, and the top and bottom of the front of the adjusting block are provided with adjusting clips, and the top and bottom of the adjusting block are installed with a driving motor group, and the ends of the driving motor group are transmission-connected with a driving shaft, and the driving shafts pass through the interior of the adjusting block, and the middle part of the adjusting block is clamped with a limit block, and the end of the driving shaft is connected to the limit block, and the external part of the driving shaft is threadedly connected with a sliding block, and the sliding block is slidably connected to the interior of the adjusting block, and the front of the sliding block is clamped with an adjusting clip.

[0010] Preferably, a clamping block is installed in the slot on the other side of the bottom of the test plate surface, and clamping clips are provided on the top and bottom of the front of the clamping block. The internal structure of the clamping block is the same as the internal structure of the adjustment block, but the adjustment block as a whole can move up and down by adjusting the screw rod, while the clamping block is fixed.

[0011] Preferably, a gear turntable is movably connected to the middle of the top of the lifting base plate, a rotating adjustment disk is installed on the top of the gear turntable, and fixing holes are opened on both sides and the back of the top of the lifting base plate near the gear turntable.

[0012] Preferably, a workpiece clamping groove is provided on the back side of the top of the rotating adjustment disk, and an automatic clamping plate is installed inside the workpiece clamping groove, and the workpiece is clamped between the automatic clamping plates. A neodymium iron boron magnet is provided on the side of the top of the rotating adjustment disk close to the workpiece clamping groove, and the neodymium iron boron magnet and the inductive proximity switch are adapted to each other and sense each other.

[0013] Preferably, a lock body is installed on the top of the rotating adjustment disk, and the bottom end of the lock body is connected to an automatic locking bolt. The automatic locking bolt and the fixed hole are adapted to each other. A driving gear is provided on the top of the lifting base plate near the front of the gear turntable. The driving gear is driven by a motor, and the gear turntable and the driving gear are engaged with each other during use.

[0014] Beneficial effects

[0015] In the present utility model, the durability testing device for metal structural parts integrates tensile performance testing, compressive testing, fatigue, durability and bending resistance testing in one, and drives the workpiece through different testing positions in sequence by rotating the adjustment dial, thereby realizing efficient continuous testing. Various components work together, such as the automatic clamping plate accurately clamps the workpiece, the inductive proximity switch cooperates with the neodymium iron boron magnet to accurately start the testing process, and the cylinder and motor precisely control the movement, making the testing process stable, accurate and efficient. This integrated design greatly improves the testing efficiency, reduces the equipment footprint and operation complexity, and provides a convenient and reliable solution for the quality testing of metal structural parts.

[0016] The design of this utility model fully considers practical application requirements, enhancing automation while ensuring detection accuracy. The combination of an inductive proximity switch and a neodymium iron boron magnet ensures automatic initiation of the detection process, minimizing manual intervention and reducing operational errors. Different types of clamping devices and drive mechanisms can accommodate metal structural parts of various sizes and shapes, enhancing the device's versatility. Furthermore, the device incorporates safety protection and precision control features, ensuring operator safety and reliable test results, playing a significant role in improving quality and technological advancement in the metal structural parts industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall structural diagram of the utility model;

[0018] Figure 2 This is an axonometric view of the lifting base plate of the present utility model;

[0019] Figure 3 This is a top view of the lifting base plate of the utility model;

[0020] Figure 4 This is a bottom view of the test panel of the present invention;

[0021] Figure 5 This is an axonometric drawing of the test panel of the present utility model;

[0022] Figure 6 This is a structural diagram of the adjustment block of the utility model.

[0023] Legend:

[0024] 1. Pad; 2. Bottom-mounted cylinder; 3. Lifting bottom plate; 4. Rotating adjustment disk; 5. Limiting support plate; 6. Test plate surface; 7. Lifting top plate; 8. Support rod; 9. Top platform; 10. Top-mounted cylinder; 11. Fixing hole; 12. Automatic locking bolt; 13. Lock body; 14. Driving gear; 15. Workpiece clamping groove; 16. Automatic clamping plate; 17. NdFeB magnet; 18. Lower pressure plate; 19. Adjusting screw rod; 20. Slotting; 21. Adjusting block; 22. Adjusting clip; 23. Inductive proximity switch; 24. Connector; 25. Clamping block; 26. Clamping clip; 27. Driving motor group; 28. Sliding block; 29. ​​Driving shaft; 30. Limiting block; 31. Gear turntable. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0026] The specific embodiments of the present utility model are described below with reference to the accompanying drawings. Specific embodiment one:

[0028] Reference Figure 1-6 A durability testing device for metal structures includes a pad 1, a rotary adjustment disk 4 and a test plate surface 6. Support rods 8 are welded on the front and back sides of the top of the pad 1, and a top platform 9 is welded on the top of the support rod 8. A top cylinder 10 is installed in the middle of the bottom end of the top platform 9. The bottom of the top cylinder 10 is connected to a lifting top plate 7. The middle part of the bottom end of the lifting top plate 7 is clamped with the test plate surface 6. The lifting top plate 7 and the support rods 8 on both sides are slidably connected.

[0029] A bottom cylinder 2 is installed in the middle of the top of the pad 1, and a lifting base plate 3 is installed on the top of the bottom cylinder 2. The lifting base plate 3 is slidably connected to the support rods 8 on both sides, and the middle parts of the support rods 8 on both sides are embedded with limit plates 5.

[0030] Slots 20 are provided on both sides of the bottom and the front of the test board surface 6. Inductive proximity switches 23 are installed on both sides of the bottom and one side of the slots 20 on the front of the test board surface 6. A connector 24 is installed in the slot 20 on the bottom front of the test board surface 6. The bottom end of the connector 24 is threadedly connected to the lower pressure plate 18.

[0031] Adjustment screw members 19 are provided on both sides of the slot 20 on one side of the bottom of the test plate surface 6. The external thread of the adjustment screw member 19 is connected with an adjustment block 21. The adjustment block 21 is slidably connected to the inside of the slot 20 on one side. The top and bottom of the front of the adjustment block 21 are provided with adjustment clips 22. The top and bottom of the adjustment block 21 are installed with a drive motor group 27. The ends of the drive motor group 27 are transmission-connected with a drive shaft 29. The drive shaft 29 passes through the interior of the adjustment block 21. The middle part of the adjustment block 21 is clamped with a limit block 30. The end of the drive shaft 29 is connected to the limit block 30. The outside of the drive shaft 29 is threadedly connected with a sliding block 28. The sliding block 28 is slidably connected to the inside of the adjustment block 21, and the front of the sliding block 28 is clamped with an adjustment clip 22.

[0032] A clamping block 25 is installed in the slot 20 on the other side of the bottom of the test plate surface 6. Clamping clips 26 are provided on the top and bottom of the front of the clamping block 25. The internal structure of the clamping block 25 is the same as that of the adjustment block 21, but the adjustment block 21 as a whole can be moved up and down by adjusting the screw rod 19, while the clamping block 25 is fixed.

[0033] A gear turntable 31 is movably connected to the middle of the top of the lifting base plate 3, and a rotating adjustment disk 4 is installed on the top of the gear turntable 31. Fixed holes 11 are opened on both sides and the back of the top of the lifting base plate 3 near the gear turntable 31.

[0034] A workpiece clamping groove 15 is provided on the back side of the top of the rotating adjustment disk 4, and an automatic clamping plate 16 is installed inside the workpiece clamping groove 15. The workpiece is clamped between the automatic clamping plates 16. A neodymium iron boron magnet 17 is provided on the side of the top of the rotating adjustment disk 4 close to the workpiece clamping groove 15. The neodymium iron boron magnet 17 and the inductive proximity switch 23 are adapted to each other and sense each other.

[0035] A lock body 13 is installed on the top of the rotary adjustment disk 4, and the bottom end of the lock body 13 is connected to an automatic lock bolt 12. The automatic lock bolt 12 and the fixed hole 11 are adapted to each other. A driving gear 14 is provided on the top of the lifting base plate 3 near the front of the gear turntable 31. The driving gear 14 is driven by a motor, and the gear turntable 31 is engaged with the driving gear 14 during use.

[0036] This equipment can complete three tests in sequence. The workpiece is clamped by the automatic clamping plate 16 in the workpiece clamping groove 15, and the gear turntable 31 can be driven to rotate by the driving gear 14. When the gear turntable 31 rotates, the rotating adjustment disk 4 on the top will also rotate, and the rotating adjustment disk 4 will carry the workpiece through the three slots 20 at the bottom of the test plate surface 6 in sequence. The clamping block 25 and the clamping clip 26 cooperate with the entire lifting base plate 3 to lift and lower the workpiece to achieve stretching, so as to use the detection equipment to test the tensile properties of the workpiece, and the lower pressure plate 18 mainly cooperates with the lifting and lowering of the test plate surface 6 to achieve pressure on the workpiece, so as to use the detection equipment to perform pressure resistance test on the workpiece. Finally, after a series of structures of the adjustment block 21 clamp the top of the workpiece, it drives the top of the workpiece to swing back and forth, so that the detection equipment can quickly test the fatigue, durability and bending resistance of the workpiece. It should be noted that the neodymium iron boron magnet 17 and the inductive proximity switch 23 are compatible with each other. Specific embodiment two:

[0038] Reference Figure 1-6 Through the synergistic effect of different components, this metal structural durability testing device can perform tensile performance testing, compressive testing and fatigue and bending resistance testing on automobile metal structural parts in turn. The metal structural part to be tested is placed in the workpiece clamping groove 15 on the top back of the rotating adjustment disk 4. The automatic clamping plate 16 has a built-in capacitive pressure sensor. When the workpiece contacts the automatic clamping plate 16, the change in capacitance value is detected, thereby determining the presence of the workpiece. Once the sensor detects the presence of the workpiece, it will immediately transmit it to the control system of the automatic clamping plate 16 through wired transmission. It should be noted that the automatic clamping plate 16 here is driven by a pneumatic device. After receiving the signal, the control system of the pneumatic device will control the automatic clamping plate 16 to clamp the workpiece. It should be noted that the pneumatic device is an existing driving device, which mainly introduces compressed air into the cylinder to drive the piston movement. It will not be explained in detail here.

[0039] The driving gear 14 is driven by the motor to rotate, driving the gear turntable 31 and the rotary adjustment disk 4 to rotate. When the workpiece clamping area on the rotary adjustment disk 4, that is, the workpiece clamping groove 15 area, rotates to the position aligned with the clamping block 25, the inductive proximity switch 23 there will sense the neodymium iron boron magnet 17 and then transmit a signal to start the tensile performance detection process. The neodymium iron boron magnet 17 is a material with very strong magnetism. When the neodymium iron boron magnet 17 is close to the inductive proximity switch 23, it will change the magnetic field around the proximity switch. Specifically, the magnetic field of the neodymium iron boron magnet 17 will interact with the alternating magnetic field generated by the proximity switch oscillator, causing the internal inductance of the proximity switch to change. When the inductance change reaches a certain level, the switch circuit is triggered to generate a switch signal, which is then transmitted to the top cylinder part 10 and the bottom cylinder part 2 via wireless transmission. As well as the control end of the clamping clip 26 on the clamping block 25 and the receiving chip of the lock body 13, it should be noted that the clamping method of the clamping clip 26 and the control method of the automatic clamp 16 are the same, both of which are driven by pneumatic devices. Secondly, the lock body 13 is the existing electric lock, but the wireless control here is wireless. The lock body 13 is implanted with a receiving chip to receive the signal transmitted by the inductive proximity switch 23. Every time the lock body 13 receives the signal, it indicates that the automatic lock bolt 12 at the bottom of the lock body 13 will be aligned with the fixed hole 11 at the corresponding position. After receiving the signal, the lock body 13 will control the automatic lock bolt 12 to descend and be inserted into the fixed hole 11 through the micro-cylinder assembly. This ensures that it is not easy to deviate or shake during the test. In the two subsequent tests, when the workpiece rotates to the corresponding position, the lock body 13 will control the automatic lock bolt 12 to be inserted into the fixed hole 11.

[0040] In the area of ​​the clamping block 25, after the automatic locking bolt 12 is locked, the control end of the overhead cylinder part 10 will receive a signal. The overhead cylinder part 10 is a complete cylinder device and will not be described in detail here. The overhead cylinder part 10 will control the test plate surface 6 at the bottom to drop to the top position of the workpiece. How to ensure that it can drop to the top position of the workpiece can be calibrated in advance. After the test plate surface 6 drops, the control end of the clamping clip 26 on the clamping block 25 will receive a signal, and then control the clamping clip 26 to clamp the top of the workpiece. The clamping control method of the clamping clip 26 and the automatic clamp 16 is the same, which will not be described in detail here. When the clamping clip 26 clamps the workpiece, the overhead cylinder part 10 will control the test plate surface 6 to slide, and the bottom cylinder part 2 will control the lifting base plate 3 to drop, so that the workpiece can be stretched. By installing a tensile force electronic monitoring element at the corresponding position, real-time monitoring of the tensile force can be realized. After the test is completed, all devices are returned to normal, and then the workpiece continues to rotate to the next position for the next test. Specific embodiment three:

[0042] Reference Figure 1-6, then a pressure test is carried out, the driving gear 14 continues to rotate, so that the rotary adjustment disk 4 rotates with the workpiece to the position corresponding to the lower pressure plate 18, and similarly, the inductive proximity switch 23 there will transmit a signal to the overhead cylinder 10 and the lock body 13 after sensing the neodymium iron boron magnet 17. Similar to the above steps, the automatic lock bolt 12 will be inserted into the fixed hole 11, and at the same time, the overhead cylinder 10 receives the signal compressed air to push the piston downward, and the piston rod drives the lifting top plate 7 to descend, and the test plate surface 6 clamped in the middle of the bottom end of the lifting top plate 7 also descends. The lower pressure plate 18 threadedly connected to the connector 24 in the front groove 20 at the bottom of the test plate surface 6 approaches the workpiece. As the test plate surface 6 continues to descend, the lower pressure plate 18 applies pressure to the workpiece, and the detection equipment can perform a pressure test on the workpiece.

[0043] After that, the last test is carried out. The workpiece continues to be rotated to the position where the top and the adjustment block 21 are aligned. After the inductive proximity switch 23 senses the neodymium iron boron magnet 17, it will transmit signals to the lock body 13, the overhead cylinder part 10, the drive motor group 27 at the top and bottom of the adjustment block 21, and the drive control end of the adjustment screw rod part 19. Similarly, the automatic lock bolt 12 will be automatically locked first, and then the overhead cylinder part 10 will control the test plate surface 6 to descend after receiving the signal, so that its adjustment block 21 comes to the position of the top of the workpiece. The drive motor group 27 will start after receiving the signal, and the drive shaft 29 connected through the transmission connection drives the sliding block 28 to slide inside the adjustment block 21. Since the external thread of the drive shaft 29 is connected to the sliding block 28, when the drive shaft 29 rotates, the sliding block 28 will move up and down according to the direction of the thread, and the adjustment clip 22 engaged on the front of the sliding block 28 will also slide accordingly, thereby clamping the top of the workpiece.

[0044] After clamping the workpiece, the drive control end of the adjusting screw member 19 will receive a signal. The adjusting screw member 19 is a structure of a motor plus a screw shaft. Through this screw structure, the adjusting block 21 can be controlled to slide up and down as a whole in the left slot 20. When the adjusting block 21 slides up and down, the top of the workpiece is clamped, so the workpiece will bend continuously when the adjusting block 21 slides, so as to further simulate different force conditions. The detection equipment can quickly detect the fatigue, durability and bending resistance of the workpiece.

[0045] It should be noted that this equipment does not specify specific monitoring instruments, and monitoring instruments can be directly purchased from the market.

[0046] For the control of the descending position accuracy of the test plate surface 6, it is possible to consider adding a position sensor, such as a photoelectric encoder or a linear displacement sensor, to monitor the position of the test plate surface 6 in real time to ensure that it accurately descends to the top position of the workpiece.

[0047] The clamping force of the clamping clip 26 and the adjusting clip 22 can be precisely controlled. A pressure sensor can be used to feedback the clamping force, and the output force of the pneumatic device or motor can be adjusted through the control system to ensure that the clamping force is moderate, which will not damage the workpiece and can ensure that the workpiece is stably clamped during the inspection process.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] 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 are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal structural member durability test device, comprising a pad (1), a rotary adjustment disk (4) and a test plate (6), characterized in that: Support rods (8) are welded to the front and back sides of the top of the support platform (1), a top platform (9) is welded to the top of the support rod (8), a top cylinder (10) is installed in the middle of the bottom end of the top platform (9), the bottom of the top cylinder (10) is connected to a lifting top plate (7), the middle of the bottom end of the lifting top plate (7) is clamped with a test plate surface (6), the lifting top plate (7) and the support rods (8) on both sides are slidably connected, a bottom cylinder (2) is installed in the middle of the top of the support platform (1), a lifting bottom plate (3) is installed on the top of the bottom cylinder (2), and the lifting bottom plate (3) and the support rods (8) on both sides are slidably connected.

2. A metal structural member durability testing device according to claim 1, characterized in that: The middle parts of the support rods (8) on both sides are embedded with limiting support plates (5).

3. The metal structural member durability testing device according to claim 1, characterized in that: Slots (20) are provided on both sides of the bottom and the front of the test board surface (6), and inductive proximity switches (23) are installed on both sides of the bottom and one side of the slots (20) on the front of the test board surface (6). A connector (24) is installed in the slot (20) on the front of the bottom of the test board surface (6), and the bottom end of the connector (24) is threadedly connected to a lower pressure plate (18).

4. A metal structural member durability testing device according to claim 3, characterized in that: Adjustment screw rods (19) are provided on both sides of the slot (20) on one side of the bottom of the test plate surface (6), and the external thread of the adjustment screw rod (19) is connected to an adjustment block (21), and the adjustment block (21) is slidably connected to the inside of the slot (20) on one side. Adjustment clips (22) are provided on the top and bottom of the front of the adjustment block (21), and a drive motor group (27) is installed on the top and bottom of the adjustment block (21). The ends of the drive motor group (27) are The transmission is connected with a driving shaft (29), which passes through the interior of the adjusting block (21), and the middle part of the adjusting block (21) is clamped with a limit block (30), and the end of the driving shaft (29) is connected to the limit block (30), and the outside of the driving shaft (29) is threadedly connected with a sliding block (28), and the sliding block (28) is slidably connected to the inside of the adjusting block (21), and the front of the sliding block (28) is clamped with an adjusting clip (22).

5. A metal structural member durability testing device according to claim 4, characterized in that: A clamping block (25) is installed in the slot (20) on the other side of the bottom of the test plate surface (6), and clamping clips (26) are provided on the top and bottom of the front of the clamping block (25). The internal structure of the clamping block (25) is the same as the internal structure of the adjustment block (21).

6. A metal structural member durability testing device according to claim 2, characterized in that: The middle of the top of the lifting base plate (3) is movably connected to a gear turntable (31), and a rotating adjustment disk (4) is installed on the top of the gear turntable (31). The top of the lifting base plate (3) is close to the gear turntable (31) on both sides and the back thereof and has fixing holes (11).

7. A metal structural member durability testing device according to claim 6, characterized in that: A workpiece clamping groove (15) is provided on the back side of the top of the rotary adjustment disk (4), and an automatic clamping plate (16) is installed inside the workpiece clamping groove (15). The workpiece is clamped between the automatic clamping plates (16). A neodymium iron boron magnet (17) is provided on one side of the top of the rotary adjustment disk (4) close to the workpiece clamping groove (15). The neodymium iron boron magnet (17) and the inductive proximity switch (23) are adapted to each other and sense each other.

8. A metal structural member durability testing device according to claim 7, characterized in that: A lock body (13) is installed on the top of the rotary adjustment disk (4), and an automatic lock bolt (12) is connected to the bottom end of the lock body (13). The automatic lock bolt (12) and the fixed hole (11) are adapted to each other. A driving gear (14) is provided on the top of the lifting base plate (3) near the front of the gear turntable (31). The driving gear (14) is driven by a motor, and the gear turntable (31) and the driving gear (14) are meshed with each other during use.

Images