Novel metal material stress detection device and method

Abstract

This invention provides a novel stress testing device and method for metallic materials, relating to the field of metallic material testing technology. It includes a support frame and a clamping device. A support plate is fixedly connected to the upper end of the support frame, and a control console is fixedly connected to the upper end of the support plate. A lower testing seat is fixedly connected to the upper end of the support plate. Mounting slide rods are fixedly connected to the four corners of the upper end of the lower testing seat. A limiting plate is fixedly connected to the upper end of the arc surfaces of the four mounting slide rods. A control rod is fixedly connected to the middle end of the surface of the limiting plate. An upper testing seat is fixedly connected to the lower end of the control rod at a position corresponding to the lower testing seat. The four corners of the upper testing seat slide through the arc surfaces of the four mounting slide rods. A clamping device, including a mounting base, is installed on the inner wall of the lower testing seat. This invention solves the problems of cumbersome clamping operation and insufficient clamping stability by designing a clamping device, a lubrication device, and a limiting device.

Description

Technical Field

[0001] This invention relates to the field of metal material testing technology, and in particular to a novel stress testing device and method for metal materials. Background Technology

[0002] In fields such as machinery manufacturing, aerospace, and automotive industries, stress testing of metallic materials is a key step in evaluating the mechanical properties of materials, and is usually used to determine the tensile strength, yield point, and deformation characteristics of materials.

[0003] Existing technologies, such as the invention with publication number CN119036386A, disclose a material fixing device for metal material detection. A first support plate is mounted on a movable base plate, a second support plate is mounted on the first support plate, a height adjustment mechanism is located between the movable base plate and the first support plate, a shock absorption mechanism is located between the first and second support plates, two support frames are respectively mounted on the second support plate, a rotating sleeve is mounted on the support frame, the rotating sleeve is connected to a first power component, the end of a clamping moving rod passes through the rotating sleeve and is connected to a clamping seat, a scale is fixed to the side of the support frame and rotatably connected to the rotating sleeve, and the clamping seat is connected to a driving component. This device can achieve the fixing and angle detection of metal materials.

[0004] In practical use, it was found that when testing the stress on metal materials, it is often necessary to frequently adjust the clamping structure according to the different sizes and shapes of the materials. Since general clamping devices use manual bolts or single-point clamping, the operation steps are cumbersome and the clamping force is unevenly distributed, which reduces the overall testing efficiency and ease of operation. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as cumbersome clamping operations and insufficient clamping stability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel metal material stress testing device and method, comprising a support frame and a clamping device, wherein a support plate is fixedly connected to the upper end of the support frame, a control console is fixedly connected to the upper end of the support plate, a lower testing seat is fixedly connected to the upper end of the support plate, mounting slide rods are fixedly connected to the four corners of the upper end of the lower testing seat, a limiting plate is fixedly connected to the upper end of the arc surface of each of the four mounting slide rods, a control rod is fixedly connected to the middle end of the surface of the limiting plate, and an upper testing seat is fixedly connected to the lower end of the control rod corresponding to the position of the lower testing seat. The four corners of the lower detection seat slide through the arc surfaces of the four mounting slide rods. A clamping device is installed on the inner wall of the lower detection seat. The clamping device includes a mounting base, the two side surfaces of which are slidably connected to the inner wall of the lower detection seat. Two clamping grooves are formed at the upper end of the mounting base. Clamping screws rotatably pass through the inner walls of the clamping grooves. One end of each clamping screw is fixedly connected to a synchronous pulley. The arc surfaces of the two synchronous pulleys are driven by the same synchronous belt. A fastening groove is formed at the upper end of the mounting base. A fastening screw rotatably passes through the inner wall of the fastening groove. One end of the mounting base is fixedly connected to a fixed... The mounting plate has a fastening motor and a clamping motor fixedly connected to its upper end. The output end of the clamping motor is fixedly connected to one end of one of the clamping screws, and the output end of the fastening motor is fixedly connected to one end of the fastening screw. Four clamping sliders are slidably connected to the upper end of the mounting base corresponding to the positions of the clamping screws. The inner walls of the four clamping sliders are threaded through the arc surface of the clamping screw. The four clamping sliders are grouped in pairs. A rotating frame is fixedly connected to the upper end of each group of clamping sliders. Rotating rods are rotatably connected to the inner walls of the two rotating frames, and clamping plates are fixedly connected to the arc surfaces of the two rotating rods. The clamping plate has an "L" shaped cross-section. A fastening slider is provided at the upper end of the mounting base corresponding to the positions of the two clamping plates. The lower end of each fastening slider is threaded through the arc surface of a fastening screw. A fastening abutment is fixedly connected to the end of each of the two fastening sliders that is close to each other. The lower end of the fastening abutment has a "T" shaped cross-section. A pressing handle is rotatably connected to the end of each fastening slider away from the fastening abutment. An eccentric wheel is fixedly connected to the lower end of the pressing handle. A friction plate is slidably connected to the inner wall of the fastening abutment. The surface of the eccentric wheel abuts against the upper end of the friction plate, and the lower end of the friction plate abuts against the surface of the mounting base.

[0007] The above components achieve the following effects: the clamping motor drives the clamping screw to rotate, causing the clamping slider and the rotating frame to move towards each other, thus clamping the workpiece with the clamping plate; the fastening motor drives the fastening screw to rotate, causing the fastening slider and the fastening abutment to approach and press against the clamping plate; then the handle is rotated to make the eccentric wheel press down on the friction plate and lock it with the mounting base, thus completing the double fixation of the workpiece, improving the stability during inspection and preventing the workpiece from sliding.

[0008] Preferably, the two clamping plates have a plurality of toothed grooves at their ends that are close to each other, and the plurality of toothed grooves are evenly distributed on the surface of the clamping plates.

[0009] The effect achieved by the above components is to increase the friction between the clamping plate and the workpiece surface by increasing the tooth grooves, thereby preventing the workpiece from rotating or shifting during force detection and improving clamping reliability.

[0010] Preferably, a gasket is fixedly connected to the ends of the two clamping plates that are far apart from each other, and the sides of the two gaskets that are far apart from each other abut against the two fastening sliders respectively. The gasket is a wear-resistant rubber sheet.

[0011] The above components achieve the following effects: by buffering the rigid impact between the fastening slider and the clamping plate through the shims, damage to the surface of the clamping plate is avoided, and noise during fastening is reduced.

[0012] Preferably, both ends of the rotating rod are fitted with coil springs, and the two ends of the coil springs are respectively fixedly connected to one end of the rotating rod and the surface of the rotating frame.

[0013] The effect achieved by the above components is that the automatic reset force provided by the coil spring keeps the clamping plate open when not clamped, making it easier to put the workpiece in and improving the convenience of operation.

[0014] Preferably, each of the four corners of the limiting plate is provided with a lubrication device, and each of the four lubrication devices includes two mounting plates. The mounting plates are arranged in pairs, and one end of each pair of mounting plates is fixedly connected to the surface of the limiting plate. The ends of each pair of mounting plates are fixedly connected to the same oil reservoir. The lower end of the oil reservoir is slidably connected to an insertion rod. A lubrication ring is sleeved on the arc surface of the mounting rod. The lubrication ring is a wear-resistant rubber ring. One end of the lubrication ring is fixedly connected to a connecting plate. The bottom end of the insertion rod is fixedly connected to one end of the connecting plate. Oil guide grooves are provided on the upper end of the connecting plate and on the side of the insertion rod near the connecting plate.

[0015] The effect achieved by the above components is as follows: after each test, the upper test seat is raised to the top, raising the lubrication ring and driving the insertion rod to push into the oil tank. The lubricating oil flows out from the oil guide groove to the lubrication ring to lubricate the mounting slide rod, realizing automatic quantitative lubrication and avoiding manual operation.

[0016] Preferably, a telescopic rod is fixedly connected to the lower end of the limiting plate at the position corresponding to the lubrication ring. A spring is sleeved on the arc surface of the telescopic rod, and the two ends of the spring are fixedly connected to the fixed end of the telescopic rod and the upper end of the lubrication ring, respectively.

[0017] The effect achieved by the above components is that the lubrication ring automatically springs back to its original position after the detection is completed by the elastic force of the spring, preparing for the next lubrication action and improving the automation level of the equipment.

[0018] Preferably, a sealing ring, which is a rubber ring, is fixedly connected to the lower end of the oil storage tank at the position corresponding to the insertion rod.

[0019] The aforementioned components achieve the following effects: by using a sealing ring to prevent lubricating oil from leaking from the gap between the oil reservoir and the insertion rod, and at the same time preventing dust from entering and contaminating the lubricating oil, the cleanliness and reliability of the lubrication system are ensured.

[0020] Preferably, a plurality of limiting devices are provided at the ends of the lower detection seat and the clamping device that are close to each other. Each of the limiting devices includes a limiting groove, and the limiting grooves are evenly distributed on the surfaces of the lower detection seat and the mounting seat that are close to each other. A mounting rod is fixedly connected to the inner wall of the limiting groove corresponding to the lower detection seat. A limiting block is rotatably connected to the inner wall of the arc surface of the limiting groove by means of the mounting rod. The limiting block has the same sliding hole on both sides of its surface. A blocking block is slidably connected to the inner wall of the sliding hole. Matching holes are provided on both sides of the inner wall of the mounting seat corresponding to the limiting groove. The arc surface of the blocking block is slidably connected to the inner wall of the mating hole. A through hole is provided on the upper surface of the limiting block at the position corresponding to the sliding hole. A mating plate is provided at the upper end of the limiting block. A separation plate is fixedly connected to one end of the mating plate. The cross-section of the separation plate is conical. The surface of the separation plate is slidably connected to the inner wall of the through hole. Two fixing brackets are fixedly connected to the upper end of the limiting block. A stop bar is rotatably connected to the inner wall of one of the fixing brackets. A fixing bolt is threaded through one side of the other fixing bracket. The arc surface of the fixing bolt slides through one end of the stop bar.

[0021] The above components achieve the following effects: by rotating the limit block, the stop block is inserted into the mating hole, locking the mounting base inside the lower detection base; when disassembly is required, the separation plate is pulled up to disengage the stop block from the mating hole, achieving quick unlocking, avoiding the trouble of disassembling with tools, and improving maintenance efficiency.

[0022] Preferably, magnetic sheets are fixedly connected to the ends of the two blocks that are close to each other, and the two magnetic sheets attract each other. A reset sheet is fixedly connected to one end of the separation plate, and the reset sheet is an elastic alloy sheet.

[0023] The effect achieved by the above components is as follows: after the separation plate is pulled up, the two blocks automatically reset inward under the magnetic adsorption, so that the limit block returns to the free rotation state, realizing the automatic reset function and simplifying the operation steps. When the separation plate is inserted, the elastic deformation force of the reset plate can automatically press the blocks to keep them in the separated state and prevent accidental locking. When the separation plate is pulled out again, the reset plate returns to its original state, ensuring the reliability of the limit device.

[0024] A novel stress testing device and method for metallic materials includes the following steps:

[0025] S1: Place the metal material to be tested on the mounting base of the clamping device, start the clamping motor, and the clamping motor drives the two clamping screws to rotate synchronously through the synchronous pulley and synchronous belt. The four clamping sliders on the clamping screws are in pairs, which drive the rotating frame above and the L-shaped clamping plate to move towards each other, and perform preliminary centering and clamping of the metal material from both sides. The toothed grooves on the inner side of the clamping plate increase the friction with the material surface to prevent the material from rotating circumferentially or sliding axially during the test.

[0026] S2: After initial clamping, start the fastening motor. The fastening motor drives the fastening screw to rotate, and the two fastening sliders on the fastening screw move the fastening abutment towards the clamping plate. The fastening abutment first contacts the wear-resistant rubber pad on the back of the clamping plate to buffer the rigid impact. Then the fastening slider continues to move, and the fastening abutment further presses the clamping plate against the material surface to achieve secondary locking. Then, manually turn the pressing handle downwards. The pressing handle drives the eccentric wheel to rotate, and the protruding part of the eccentric wheel presses down on the friction plate. The lower end of the friction plate presses tightly against the upper surface of the mounting base, locking the position of the entire fastening slider and preventing it from loosening due to vibration during the testing process.

[0027] S3: During the testing process, the upper testing seat slides up and down along the four mounting slides under the drive of the control lever, applying a force load to the metal material on the clamping device. After each test, the upper testing seat rises to its highest point, and its upper surface contacts and lifts the wear-resistant rubber lubricating ring fitted on the mounting slide. The lubricating ring is fixedly connected to the insertion rod through the connecting plate, driving the insertion rod to move upward. The top of the insertion rod is pushed into the oil tank. The lubricating oil in the oil tank flows downward along the oil guide groove opened on the side wall of the insertion rod and the connecting plate, and is evenly coated on the upper surface and inner side of the lubricating ring. As the lubricating ring slides along the mounting slide, the lubricating oil is evenly coated on the arc surface of the mounting slide, realizing automatic quantitative lubrication.

[0028] S4: When the upper detection seat descends for the next test, the telescopic rod fixed below the limit plate is fitted with a spring. The spring force pushes the lubricating ring back to its original position, causing the insertion rod to be pulled out of the oil tank and stopping the oil discharge. The rubber sealing ring at the lower end of the oil tank prevents the lubricating oil from leaking and dust from entering when not in operation.

[0029] S5: When the test is completed and the material needs to be released, rotate the handle in the opposite direction to release the friction plate from the eccentric wheel, then rotate the motor and clamping motor in reverse. The clamping plate will automatically open under the restoring force of the coil spring to remove the tested material.

[0030] S6: When maintenance or replacement of the clamping device is required, pull up the separation plate. The separation plate is conical in shape. Its lower end is inserted between the two blocks along the through hole of the limiting block. The conical surface forces the two blocks to overcome the magnetic attraction force and slide outward, disengaging from the mating hole on the side wall of the mounting base. The elastic alloy reset plate connected to the separation plate undergoes elastic deformation after insertion, keeping the separation plate in the open state. At this time, there is no locking between the limiting block and the mounting base. The mounting base can be directly pulled out from the lower detection base.

[0031] S7: During installation, push the mounting base into place, pull the separator plate upwards to remove it from the through hole, the reset plate springs back, and the two blocks automatically reset inwards under the magnetic attraction of the magnetic plate. At the same time, rotate the limit block to make the block re-engage in the mating hole, completing the locking. The stop bar and fixing bolt limit the rotation angle of the limit block to prevent excessive rotation.

[0032] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0033] In this invention, a clamping device is used. A clamping motor drives the clamping screw to rotate, causing the clamping slider and rotating frame to move towards each other. This allows the L-shaped clamping plate to center and clamp the metal material. Simultaneously, the toothed grooves on the inner side of the clamping plate increase friction to prevent workpiece slippage. Subsequently, a fastening motor drives the fastening screw to rotate, causing the fastening slider to move the fastening abutment towards the clamping plate and press against the wear-resistant rubber pad on the back of the clamping plate, achieving secondary locking. Finally, rotating the pressing handle causes the eccentric wheel to press down on the friction plate and lock it against the surface of the mounting base, completing double stable fixing. Furthermore, the coil springs at both ends of the rotating rod automatically reset the clamping plate after the clamping is released, facilitating the next material release. This device solves the problems of cumbersome manual clamping operations, uneven clamping force, and insufficient stability in the prior art, achieving electric centering clamping and double locking, significantly improving the reliability of workpiece fixation during inspection.

[0034] In this invention, a lubrication device is incorporated. After each force test, the upper detection seat rises to the limiting plate, lifting the wear-resistant rubber lubricating ring fitted on the mounting slide rod. The lubricating ring, via a connecting plate, drives the insertion rod upwards synchronously. The tip of the insertion rod is pushed into the oil reservoir, where lubricating oil flows out along the guide grooves on the insertion rod and connecting plate, evenly coating the surface of the lubricating ring, thus automatically and quantitatively lubricating the mounting slide rod. After the test, the telescopic rod and spring below the limiting plate use their elasticity to push the lubricating ring back to its original position, preparing for the next lubrication. A rubber sealing ring at the bottom of the oil reservoir prevents lubricating oil leakage and dust ingress. This device solves the problem in the prior art where the lack of automatic lubrication of sliding parts over long-term use leads to accelerated wear of the slide rod and decreased detection accuracy. It achieves automatic lubrication during the detection stroke, extending equipment life and maintaining accuracy.

[0035] In this invention, a limiting device is used. A rotatable limiting block is installed in the limiting groove between the lower detection seat and the mounting seat. Resistance blocks are installed in the sliding holes on both sides of the limiting block. Magnetic plates at the ends of the resistance blocks keep the two resistance blocks in a mutually attracted and reset state. When the clamping device needs to be installed, the mounting seat is pushed into the lower detection seat and the limiting block is rotated, causing the resistance blocks to engage with the mating holes on the side wall of the mounting seat under centrifugal force or manual manipulation, achieving quick locking. When disassembly is required, the pointed conical separation plate is pulled upwards. The separation plate moves downwards along the through hole of the limiting block and spreads the two resistance blocks, causing them to disengage from the mating holes. At the same time, the elastic alloy reset plate remains separated, and then the mounting seat can be pulled out. After the separation plate is pulled out, the magnetic plate automatically attracts and resets the resistance blocks, allowing the limiting block to rotate freely. This device solves the problem of difficult disassembly and maintenance of the clamping module and detection seat in the prior art, achieving tool-free quick locking and unlocking, and improving maintenance efficiency. Attached Figure Description

[0036] Figure 1 A three-dimensional structural schematic diagram of a novel stress detection device and method for metallic materials proposed in this invention;

[0037] Figure 2 This is a partial structural schematic diagram of a novel stress testing device and method for metallic materials proposed in this invention;

[0038] Figure 3 A schematic diagram of the clamping device structure for a novel stress detection device and method for metallic materials proposed in this invention;

[0039] Figure 4 This is a partial structural schematic diagram of the clamping device for a novel stress detection device and method for metallic materials proposed in this invention;

[0040] Figure 5 A schematic diagram of the lubrication device structure for a novel stress detection device and method for metallic materials proposed in this invention;

[0041] Figure 6 A cross-sectional schematic diagram of the lubrication device for a novel stress detection device and method for metallic materials proposed in this invention;

[0042] Figure 7 A schematic diagram of a limiting device structure for a novel stress detection device and method for metallic materials proposed in this invention;

[0043] Figure 8 This is a schematic diagram of the disassembly of the limiting device for a novel stress detection device and method for metallic materials proposed in this invention.

[0044] Legend: 1. Support frame; 2. Control console; 3. Support plate; 4. Lower detection seat; 5. Control rod; 6. Mounting slide bar; 7. Clamping device; 701. Mounting seat; 702. Clamping slide groove; 703. Clamping screw; 704. Clamping slider; 705. Rotating frame; 706. Rotating rod; 707. Clamping plate; 708. Fastening slide groove; 709. Fastening screw; 710. Fastening slider; 711. Fastening abutment; 712. Eccentric wheel; 713. Friction plate; 714. Shim; 715. Synchronous pulley; 716. Synchronous belt; 717. Fixed plate; 718. Fastening motor; 719. Clamping motor; 72 0. Press handle; 721. Coil spring; 8. Lubrication device; 81. Mounting plate; 82. Oil reservoir; 83. Insertion rod; 84. Lubrication ring; 85. Oil guide groove; 86. Telescopic rod; 87. Sealing ring; 88. Spring; 89. Connecting plate; 9. Limiting device; 901. Limiting groove; 902. Mounting rod; 903. Limiting block; 904. Through hole; 905. Separation plate; 906. Sliding hole; 907. Block; 908. Fixing bracket; 909. Stop bar; 910. Fixing bolt; 911. Magnetic piece; 912. Reset piece; 913. Mating hole; 914. Mating plate; 10. Upper detection seat; 11. Limiting plate. Detailed Implementation

[0045] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0046] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0047] like Figure 1 and Figure 2As shown, the present invention provides a novel stress testing device and method for metal materials, including a support frame 1 and a clamping device 7. A support plate 3 is fixedly connected to the upper end of the support frame 1, a control console 2 is fixedly connected to the upper end of the support plate 3, a lower testing seat 4 is fixedly connected to the upper end of the support plate 3, mounting slide rods 6 are fixedly connected to the four corners of the upper end of the lower testing seat 4, the same limiting plate 11 is fixedly connected to the upper end of the arc surface of the four mounting slide rods 6, a control rod 5 is fixedly connected to the middle end of the surface of the limiting plate 11, an upper testing seat 10 is fixedly connected to the lower end of the control rod 5 corresponding to the position of the lower testing seat 4, the four corners of the upper testing seat 10 slide through the arc surface of the four mounting slide rods 6, the clamping device 7 is installed on the inner wall of the lower testing seat 4, the four corners of the limiting plate 11 are provided with lubrication devices 8, and a number of limiting devices 9 are provided at the end of the lower testing seat 4 and the clamping device 7 that are close to each other.

[0048] The following section will describe in detail the specific configuration and function of its clamping device 7, lubrication device 8, and limiting device 9.

[0049] like Figure 3 and Figure 4As shown, the clamping device 7 includes a mounting base 701. Both sides of the mounting base 701 are slidably connected to the inner wall of the lower detection base 4. Two clamping grooves 702 are formed at the upper end of the mounting base 701. Clamping screws 703 rotatably pass through the inner wall of the clamping grooves 702. One end of each clamping screw 703 is fixedly connected to a synchronous pulley 715. The arc surfaces of the two synchronous pulleys 715 are connected to the same synchronous belt 716. A fastening groove 708 is formed at the upper end of the mounting base 701. A fastening screw 709 rotatably passes through the inner wall of the fastening groove 708. A fixing plate 717 is fixedly connected to one end of the mounting base 701. The upper end of the fixing plate 717 is fixed... A fastening motor 718 and a clamping motor 719 are connected. The output end of the clamping motor 719 is fixedly connected to one end of one of the clamping screws 703, and the output end of the fastening motor 718 is fixedly connected to one end of the fastening screw 709. Four clamping sliders 704 are slidably connected to the upper end of the mounting base 701 corresponding to the position of the clamping screw 703. The inner walls of the four clamping sliders 704 are threaded through the arc surface of the clamping screw 703. The four clamping sliders 704 are arranged in pairs. A rotating frame 705 is fixedly connected to the upper end of each pair of clamping sliders 704. Rotating rods 706 are rotatably connected to the inner walls of the two rotating frames 705. Each of the two curved surfaces of the mounting base 701 is fixedly connected to a clamping plate 707, the clamping plate 707 having an "L" shaped cross-section. A fastening slider 710 is provided at the upper end of the mounting base 701 corresponding to the positions of the two clamping plates 707. The lower end of each fastening slider 710 is threaded through the curved surface of the fastening screw 709. A fastening abutment 711 is fixedly connected to the end of each fastening slider 710 closest to each other. The lower end of the fastening abutment 711 has a "T" shaped cross-section. A pressing handle 720 is rotatably connected to the end of the fastening slider 710 away from the fastening abutment 711. An eccentric wheel 712 is fixedly connected to the lower end of the pressing handle 720. A friction plate 71 is slidably connected to the inner wall of the fastening abutment 711. 3. The surface of the eccentric wheel 712 abuts against the upper end of the friction plate 713, and the lower end of the friction plate 713 abuts against the surface of the mounting base 701. The clamping motor 719 drives the clamping screw 703 to rotate, causing the clamping slider 704 and the rotating frame 705 to move towards each other, so that the clamping plate 707 clamps the workpiece. The fastening motor 718 drives the fastening screw 709 to rotate, causing the fastening slider 710 and the fastening abutment 711 to approach the clamping plate 707 and press against it. Then, the pressing handle 720 is rotated to make the eccentric wheel 712 press down on the friction plate 713 and lock it with the mounting base 701, thus completing the double fixation of the workpiece, improving the stability during inspection and preventing the workpiece from sliding. Several toothed grooves are provided at the ends of the two clamping plates 707 that are close to each other. The toothed grooves are evenly distributed on the surface of the clamping plates 707. The toothed grooves increase the friction between the clamping plates 707 and the workpiece surface, preventing the workpiece from rotating or shifting when subjected to force detection, thus improving the clamping reliability.Two clamping plates 707 are each fixedly connected to a washer 714 at their far ends. The far ends of the two washer 714 abut against two fastening sliders 710. The washer 714 is made of wear-resistant rubber and buffers the rigid impact between the fastening sliders 710 and the clamping plates 707, preventing damage to the surface of the clamping plates 707 and reducing noise during fastening. Both ends of the rotating rod 706 are fitted with coil springs 721. The two ends of the coil springs 721 are fixedly connected to one end of the rotating rod 706 and the surface of the rotating frame 705. The coil springs 721 provide an automatic restoring force, keeping the clamping plates 707 open when not clamped, facilitating workpiece placement and improving operational convenience.

[0050] like Figure 5 and Figure 6 As shown, each of the four lubrication devices 8 includes two mounting plates 81. Several mounting plates 81 are grouped in pairs. One end of each group of mounting plates 81 is fixedly connected to the surface of the limiting plate 11. The ends of each group of mounting plates 81 that are close to each other are fixedly connected to the same oil storage tank 82. The lower end of the oil storage tank 82 is slidably connected to an insertion rod 83. A lubrication ring 84 is sleeved on the arc surface of the mounting slide rod 6. The lubrication ring 84 is a wear-resistant rubber ring. One end of the lubrication ring 84 is fixedly connected to a connecting plate 89. The bottom end of the insertion rod 83 is fixedly connected to one end of the connecting plate 89. The upper end of the connecting plate 89 and the side of the insertion rod 83 near the connecting plate 89 are both provided with oil guide grooves 85. After each test, the upper test seat 10 is raised to the top, lifting the lubrication ring 84 and driving the insertion rod 83 to push into the oil storage tank 82. The lubricating oil flows out from the oil guide groove 85 to the lubrication ring 84 to lubricate the mounting slide rod 6, realizing automatic quantitative lubrication and avoiding manual operation. A telescopic rod 86 is fixedly connected to the lower end of the limiting plate 11 at the position corresponding to the lubrication ring 84. A spring 88 is sleeved on the arc surface of the telescopic rod 86. The two ends of the spring 88 are fixedly connected to the fixed end of the telescopic rod 86 and the upper end of the lubrication ring 84, respectively. The elastic force of the spring 88 causes the lubrication ring 84 to automatically spring back and reset after the detection is completed, preparing for the next lubrication action and improving the automation level of the equipment. A sealing ring 87 is fixedly connected to the lower end of the oil tank 82 at the position corresponding to the insertion rod 83. The sealing ring 87 is a rubber ring. The sealing ring 87 prevents lubricating oil from leaking from the gap between the oil tank 82 and the insertion rod 83, and at the same time prevents dust from entering and contaminating the lubricating oil, ensuring the cleanliness and reliability of the lubrication system.

[0051] like Figure 7 and Figure 8As shown, several limiting devices 9 each include a limiting groove 901. These limiting grooves 901 are evenly distributed on the surfaces of the lower detection seat 4 and the mounting seat 701, which are close to each other. A mounting rod 902 is fixedly connected to the inner wall of the lower detection seat 4 corresponding to the limiting groove 901. A limiting block 903 is rotatably connected to the inner wall of the arc-shaped surface of the limiting groove 901 via the mounting rod 902. The limiting block 903 has the same sliding hole 906 on both sides of its surface. A stop block 907 is slidably connected to the inner wall of the sliding hole 906. Matching holes 913 are provided on both sides of the inner wall of the mounting seat 701 corresponding to the limiting groove 901. The arc-shaped surface of the stop block 907 is slidably connected to the inner wall of the matching hole 913. A through hole 904 is provided on the upper surface of the limiting block 903 corresponding to the position of the sliding hole 906. A matching hole 904 is provided at the upper end of the limiting block 903. Plate 914, with a separating plate 905 fixedly connected to one end of it. The separating plate 905 has a pointed conical cross-section, and its surface is slidably connected to the inner wall of the through hole 904. Two fixing brackets 908 are fixedly connected to the upper end of the limiting block 903. A stop bar 909 is rotatably connected to the inner wall of one fixing bracket 908, and a fixing bolt 910 is threaded through one side of the other fixing bracket 908. The arc surface of the fixing bolt 910 slidably passes through one end of the stop bar 909. By rotating the limiting block 903, the blocking block 907 is inserted into the mating hole 913, locking the mounting seat 701 in the lower detection seat 4. When disassembly is required, the separating plate 905 is pulled up to disengage the blocking block 907 from the mating hole 913, achieving quick unlocking and avoiding the trouble of disassembly with tools, thus improving maintenance efficiency. Two resistive blocks 907 are each fixedly connected to a magnetic sheet 911 at their closest ends, and the two magnetic sheets 911 attract each other. One end of the separating plate 905 is fixedly connected to a reset piece 912, which is an elastic alloy sheet. After the separating plate 905 is pulled up, the two resistive blocks 907 automatically reset inward under the attraction of the magnetic sheets 911, allowing the limiting block 903 to return to its free rotation state, thus realizing the automatic reset function and simplifying the operation steps. When the separating plate 905 is inserted, the elastic deformation force of the reset piece 912 can automatically press the resistive blocks 907 to keep them in a separated state, preventing accidental locking. Pulling out the separating plate 905 again allows the reset piece 912 to return to its original state, ensuring the reliability of the operation of the limiting device 9.

[0052] A novel stress testing device and method for metallic materials includes the following steps:

[0053] S1: Place the metal material to be tested on the mounting base 701 of the clamping device 7, start the clamping motor 719, and the clamping motor 719 drives the two clamping screws 703 to rotate synchronously through the synchronous pulley 715 and the synchronous belt 716. The four clamping sliders 704 on the clamping screws 703 are in pairs, which drive the rotating frame 705 above and the L-shaped clamping plate 707 to move towards each other, and perform preliminary centering and clamping of the metal material from both sides. The toothed grooves on the inner side of the clamping plate 707 increase the friction with the material surface to prevent the material from rotating circumferentially or sliding axially during the test.

[0054] S2: After initial clamping, start the fastening motor 718. The fastening motor 718 drives the fastening screw 709 to rotate. The two fastening sliders 710 on the fastening screw 709 drive the fastening abutment 711 to move towards the clamping plate 707. The fastening abutment 711 first contacts the wear-resistant rubber pad 714 on the back of the clamping plate 707 to buffer the rigid impact. Then the fastening slider 710 continues to move, and the fastening abutment 711 further presses the clamping plate 707 against the material surface to achieve secondary locking. Then manually turn the pressing handle 720 downward. The pressing handle 720 drives the eccentric wheel 712 to rotate. The protruding part of the eccentric wheel 712 presses down on the friction plate 713. The lower end of the friction plate 713 presses tightly against the upper surface of the mounting base 701, locking the position of the entire fastening slider 710 and preventing it from loosening due to vibration during the testing process.

[0055] S3: During the testing process, the upper testing seat 10 slides up and down along the four mounting slide rods 6 under the drive of the control rod 5, applying a force load to the metal material on the clamping device 7; after each test, the upper testing seat 10 rises to the highest point, and its upper surface contacts and lifts the wear-resistant rubber lubricating ring 84 fitted on the mounting slide rod 6. The lubricating ring 84 is fixedly connected to the insertion rod 83 through the connecting plate 89, driving the insertion rod 83 to move upward, and the top of the insertion rod 83 is pushed into the oil storage tank 82; the lubricating oil in the oil storage tank 82 flows down along the side wall of the insertion rod 83 and the oil guide groove 85 opened on the connecting plate 89, and is evenly coated on the upper surface and inner side of the lubricating ring 84. As the lubricating ring 84 slides along the mounting slide rod 6, the lubricating oil is evenly coated on the arc surface of the mounting slide rod 6, realizing automatic quantitative lubrication.

[0056] S4: When the upper detection seat 10 descends for the next detection, the telescopic rod 86 fixed below the limit plate 11 is fitted with a spring 88. The elastic force of the spring 88 pushes the lubricating ring 84 back to its original position, causing the insertion rod 83 to be pulled out of the oil tank 82 and stopping the oil discharge. The rubber sealing ring 87 at the lower end of the oil tank 82 prevents the lubricating oil from leaking and dust from entering when not in operation.

[0057] S5: When the test is completed and the material needs to be released, rotate the handle 720 in the opposite direction to release the friction plate 713 from the eccentric wheel 712, then rotate the motor 718 and the clamping motor 719 in reverse. The clamping plate 707 will automatically open under the reset force of the coil spring 721 to remove the tested material.

[0058] S6: When maintenance or replacement of clamping device 7 is required, pull up the separation plate 905. The separation plate 905 is a pointed cone shape. Its lower end is inserted downward between the two blocking blocks 907 along the through hole 904 of the limiting block 903. The cone surface forces the two blocking blocks 907 to overcome the attraction force of the magnetic sheet 911 and slide outward, disengaging from the mating hole 913 on the side wall of the mounting base 701. The elastic alloy reset piece 912 connected to the separation plate 905 undergoes elastic deformation after insertion, keeping the separation plate 905 in the open state. At this time, there is no locking between the limiting block 903 and the mounting base 701, and the mounting base 701 can be directly pulled out from the lower detection base 4.

[0059] S7: During installation, push the mounting base 701 into place, pull up the separating plate 905 to make it exit the through hole 904, the reset piece 912 springs back, and the two blocks 907 automatically reset inward under the attraction of the magnetic piece 911. At the same time, rotate the limiting block 903 to make the blocks 907 re-enter the mating hole 913 to complete the locking. The stop rod 909 and the fixing bolt 910 limit the rotation angle of the limiting block 903 to prevent excessive rotation.

[0060] The overall working principle is as follows: When using this device to test the stress on metal materials, the metal material to be tested is first placed on the mounting base 701 of the clamping device 7. The clamping motor 719 is started, and the clamping motor 719 drives the two clamping screws 703 to rotate synchronously through the synchronous pulley 715 and the synchronous belt 716. The four clamping sliders 704 on the clamping screws 703 are arranged in pairs, driving the rotating frame 705 and the L-shaped clamping plate 707 above to move towards each other, thereby initially centering and clamping the metal material from both sides. Since the clamping plate 707 has evenly distributed toothed grooves on its inner side, the toothed grooves can significantly increase the friction with the material surface, avoiding circumferential rotation or axial slippage of the material during the test. After the initial clamping is completed, the fastening motor 718 is started, and the fastening motor 718 drives the fastening screw 709 to rotate. The two fastening sliders 710 on the fastening screw 709 drive the fastening abutment 711 to move towards the clamping plate 707. The fastening seat 711 first contacts the wear-resistant rubber pad 714 on the back of the clamping plate 707. The pad 714 buffers the rigid impact and prevents damage to the surface of the clamping plate 707. As the fastening slider 710 continues to move, the fastening seat 711 further presses the clamping plate 707 against the material surface, achieving secondary locking. Then, the pressing handle 720 is manually turned downwards, which drives the eccentric wheel 712 to rotate. The protruding part of the eccentric wheel 712 presses down on the friction plate 713, and the lower end of the friction plate 713 presses tightly against the upper surface of the mounting base 701, thereby locking the position of the entire fastening slider 710 and preventing it from loosening due to vibration during the testing process. When the test is completed and the material needs to be released, the pressing handle 720 is turned in the opposite direction to release the friction plate 713 from the eccentric wheel 712. Then, the fastening motor 718 and the clamping motor 719 are reversed, and the clamping plate 707 automatically opens under the return force of the coil spring 721, making it easy to remove the tested material. The entire clamping process is electrically controlled and dual-locked, solving the problems of cumbersome manual clamping operations and uneven clamping force.

[0061] During the testing process, the upper testing seat 10 slides up and down along the four mounting slide rods 6 under the drive of the control rod 5, applying a force load to the metal material on the clamping device 7. After each test, the upper testing seat 10 rises to its highest point, and its upper surface contacts and lifts the wear-resistant rubber lubricating ring 84 fitted on the mounting slide rod 6. The lubricating ring 84 is fixedly connected to the insertion rod 83 through the connecting plate 89. Therefore, when the lubricating ring 84 rises, it simultaneously drives the insertion rod 83 to move upward, and the top of the insertion rod 83 is pushed into the oil storage tank 82. The oil storage tank 82 is pre-filled with lubricating oil. When the insertion rod 83 enters the oil storage tank 82, the lubricating oil flows downward along the side wall of the insertion rod 83 and the oil guide groove 85 opened on the connecting plate 89, and is evenly coated on the upper surface and inner side of the lubricating ring 84. As the lubricating ring 84 slides along the mounting slide rod 6, the lubricating oil is evenly coated on the arc surface of the mounting slide rod 6, realizing automatic quantitative lubrication. Subsequently, the upper detection seat 10 descends for the next test. At this time, the telescopic rod 86 fixed below the limit plate 11 is fitted with a spring 88. The elastic force of the spring 88 pushes the lubrication ring 84 back to its original position, causing the insertion rod 83 to be pulled out of the oil reservoir 82, stopping the oil discharge. The rubber sealing ring 87 at the lower end of the oil reservoir 82 effectively prevents lubricating oil leakage when not in operation and also prevents dust from entering and contaminating the oil. This lubrication device 8 utilizes the lifting stroke of the detection equipment itself to complete the lubrication action without manual intervention, solving the problem of increased wear and decreased detection accuracy caused by lack of lubrication after long-term use of the slide rod.

[0062] When maintenance or replacement of the clamping device 7 is required, the operator can quickly disassemble and assemble it without using any tools. A limiting device 9 is provided between the lower detection seat 4 and the mounting seat 701: a limiting groove 901 is opened on the inner wall of the lower detection seat 4, and a limiting block 903 is rotatably connected to the limiting groove 901 through the mounting rod 902. The sliding holes 906 on both sides of the limiting block 903 are equipped with resistance blocks 907. The two resistance blocks 907 are attracted to each other by a magnetic sheet 911 and are normally kept in an inward retracted state. When the mounting seat 701 needs to be removed, the separating plate 905 is pulled upward. The separating plate 905 is conical, and its lower end is inserted downward between the two resistance blocks 907 along the through hole 904 of the limiting block 903. The conical surface forces the two resistance blocks 907 to overcome the attraction force of the magnetic sheet 911 and slide outward, thereby disengaging from the mating hole 913 on the side wall of the mounting seat 701. The elastic alloy reset piece 912 connected to the separation plate 905 undergoes elastic deformation after insertion, keeping the separation plate 905 in an open state. At this time, there is no lock between the limit block 903 and the mounting base 701, and the operator can directly pull the mounting base 701 out of the lower detection base 4. During installation, the mounting base 701 is pushed into place, and the separation plate 905 is pulled upwards to exit the through hole 904. The reset piece 912 springs back, and the two resisting blocks 907 automatically reset inwards under the attraction of the magnetic piece 911. At the same time, the limit block 903 is rotated so that the resisting blocks 907 are locked back into the mating hole 913, completing the locking. In addition, the stop rod 909 and the fixing bolt 910 can limit the rotation angle of the limit block 903 to prevent excessive rotation. This limiting device 9 realizes tool-free quick locking and unlocking, solves the problem of difficult disassembly and maintenance of the clamping module, and improves the convenience of equipment maintenance and work efficiency.

[0063] In summary, the present invention achieves stable clamping, automatic lubrication, and rapid assembly and disassembly of metal materials through the coordinated operation of clamping device 7, lubrication device 8, and limiting device 9, effectively solving several pain points in the prior art and improving the overall efficiency and reliability of stress detection of metal materials.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A novel stress testing device and method for metallic materials, comprising a support frame (1) and a clamping device (7), characterized in that: The upper end of the support frame (1) is fixedly connected to a support plate (3), the upper end of the support plate (3) is fixedly connected to a control console (2), the upper end of the support plate (3) is fixedly connected to a lower detection seat (4), the four corners of the upper end of the lower detection seat (4) are fixedly connected to mounting slide rods (6), the upper ends of the arc surfaces of the four mounting slide rods (6) are fixedly connected to the same limiting plate (11), the middle end of the surface of the limiting plate (11) is fixedly connected to a control rod (5), the lower end of the control rod (5) is fixedly connected to an upper detection seat (10) corresponding to the position of the lower detection seat (4), the four corners of the upper detection seat (10) slide through the arc surfaces of the four mounting slide rods (6), and the inner wall of the lower detection seat (4) is equipped with a clamping device (7).

2. The novel stress testing equipment and method for metallic materials according to claim 1, characterized in that: The clamping device (7) includes a mounting base (701). Both sides of the mounting base (701) are slidably connected to the inner wall of the lower detection base (4). The upper end of the mounting base (701) has two clamping grooves (702). The inner wall of the clamping grooves (702) is rotatably connected to clamping screws (703). One end of each of the two clamping screws (703) is fixedly connected to a synchronous pulley (715). The arc surfaces of the two synchronous pulleys (715) are connected to the same synchronous belt (716). The upper end of the mounting base (701) has a fastening groove (708). The inner wall of the fastening groove (708) is rotatably connected to a fastening screw (709). A fixing plate (717) is fixedly connected to one end of the mounting base (701). A fastening motor (718) and a clamping motor (719) are fixedly connected to the upper end of the fixing plate (717). The output end of the clamping motor (719) is fixedly connected to one end of one of the clamping screws (703). The output end of the fastening motor (718) is fixedly connected to one end of the fastening screw (709). Four clamping sliders (704) are slidably connected to the upper end of the mounting base (701) at positions corresponding to the clamping screws (703). The inner walls of the four clamping sliders (704) are threaded through the arc surface of the clamping screws (703). Two blocks are grouped together. The upper end of each group of clamping sliders (704) is fixedly connected to a rotating frame (705). The inner walls of the two rotating frames (705) are rotatably connected to rotating rods (706). The arc surfaces of the two rotating rods (706) are fixedly connected to clamping plates (707). The cross-section of the clamping plates (707) is "L" shaped. The upper end of the mounting base (701) is provided with fastening sliders (710) corresponding to the positions of the two clamping plates (707). The lower ends of the fastening sliders (710) are threaded through the arc surfaces of the fastening screws (709). The ends of the two fastening sliders (710) that are close to each other are fixedly connected to fastening abutments (711). The lower end of the fastening seat (711) has a "T" shaped cross section. The end of the fastening slider (710) away from the fastening seat (711) is rotatably connected to a pressing handle (720). The lower end of the pressing handle (720) is fixedly connected to an eccentric wheel (712). The inner wall of the fastening seat (711) is slidably connected to a friction plate (713). The surface of the eccentric wheel (712) abuts against the upper end of the friction plate (713). The lower end of the friction plate (713) abuts against the surface of the mounting base (701). The two clamping plates (707) are provided with a number of toothed grooves at their close ends. The number of toothed grooves are evenly distributed on the surface of the clamping plates (707).

3. The novel stress testing equipment and method for metallic materials according to claim 2, characterized in that: Each of the two clamping plates (707) has a gasket (714) fixedly connected to one end away from the other. The two gaskets (714) abut against the two fastening sliders (710) on the opposite side. The gaskets (714) are wear-resistant rubber sheets.

4. The novel stress testing equipment and method for metallic materials according to claim 2, characterized in that: Both ends of the rotating rod (706) are fitted with coil springs (721), and both ends of the coil springs (721) are fixedly connected to one end of the rotating rod (706) and the surface of the rotating frame (705).

5. The novel stress testing equipment and method for metallic materials according to claim 1, characterized in that: Lubrication devices (8) are provided at all four corners of the limiting plate (11). Each of the four lubrication devices (8) includes two mounting plates (81). The mounting plates (81) are arranged in pairs. One end of each set of mounting plates (81) is fixedly connected to the surface of the limiting plate (11). The same oil storage tank (82) is fixedly connected to the end of each set of mounting plates (81) that is close to each other. An insertion rod (83) is slidably connected to the lower end of the oil storage tank (82). A lubrication ring (84) is sleeved on the arc surface of the mounting slide rod (6). The lubrication ring (84) is a wear-resistant rubber ring. A connecting plate (89) is fixedly connected to one end of the lubrication ring (84). The bottom end of the insertion rod (83) is fixedly connected to one end of the connecting plate (89). An oil guide groove (85) is provided on the upper end of the connecting plate (89) and the side of the insertion rod (83) that is close to the connecting plate (89).

6. The novel stress testing equipment and method for metallic materials according to claim 5, characterized in that: The lower end of the limiting plate (11) is fixedly connected to the position corresponding to the lubrication ring (84) with a telescopic rod (86). A spring (88) is sleeved on the arc surface of the telescopic rod (86). The two ends of the spring (88) are fixedly connected to the fixed end of the telescopic rod (86) and the upper end of the lubrication ring (84), respectively.

7. The novel stress testing equipment and method for metallic materials according to claim 5, characterized in that: A sealing ring (87) is fixedly connected to the lower end of the oil storage tank (82) at the position corresponding to the insertion rod (83). The sealing ring (87) is a rubber ring.

8. The novel stress testing equipment and method for metallic materials according to claim 1, characterized in that: A plurality of limiting devices (9) are provided at the end of the lower detection seat (4) and the clamping device (7) that are close to each other. Each of the limiting devices (9) includes a limiting groove (901). The limiting grooves (901) are evenly opened on the surfaces of the lower detection seat (4) and the mounting seat (701) that are close to each other. The limiting groove (901) is fixedly connected to the inner wall of the lower detection seat (4) with a mounting rod (902). The inner wall of the arc surface of the limiting groove (901) is rotatably connected to a limiting block (903) by means of the mounting rod (902). The two sides of the limiting block (903) are provided with the same sliding hole (906). The inner wall of the sliding hole (906) is slidably connected to a stop block (907). The two sides of the limiting groove (901) are provided with mating holes (913) on both sides of the inner wall of the mounting seat (701). The stop block (907) The arc surface of the limiting block (907) is slidably connected to the inner wall of the mating hole (913). A through hole (904) is provided on the upper surface of the limiting block (903) corresponding to the position of the sliding hole (906). A mating plate (914) is provided at the upper end of the limiting block (903). A separation plate (905) is fixedly connected to one end of the mating plate (914). The cross section of the separation plate (905) is conical. The surface of the separation plate (905) is slidably connected to the inner wall of the through hole (904). Two fixing brackets (908) are fixedly connected to the upper end of the limiting block (903). A stop rod (909) is rotatably connected to the inner wall of one of the fixing brackets (908). A fixing bolt (910) is threaded through one side of the other fixing bracket (908). The arc surface of the fixing bolt (910) is slidably connected to one end of the stop rod (909).

9. The novel stress testing equipment and method for metallic materials according to claim 8, characterized in that: The two blocks (907) are fixedly connected to a magnetic sheet (911) at one end close to each other, and the two magnetic sheets (911) attract each other. A reset sheet (912) is fixedly connected to one end of the separation plate (905), and the reset sheet (912) is an elastic alloy sheet.

10. A novel stress testing device and method for metallic materials according to claims 1-9, comprising the following steps: S1: Place the metal material to be tested on the mounting base (701) of the clamping device (7), start the clamping motor (719), the clamping motor (719) drives the two clamping screws (703) to rotate synchronously through the synchronous wheel (715) and the synchronous belt (716), the four clamping sliders (704) on the clamping screws (703) are in pairs, driving the rotating frame (705) above and the L-shaped clamping plate (707) to move towards each other, and perform preliminary centering and clamping of the metal material from both sides; the tooth groove on the inner side of the clamping plate (707) increases the friction with the material surface, preventing the material from rotating circumferentially or sliding axially during the test. S2: After initial clamping is completed, the fastening motor (718) is started. The fastening motor (718) drives the fastening screw (709) to rotate. The two fastening sliders (710) on the fastening screw (709) drive the fastening abutment (711) to move towards the clamping plate (707). The fastening abutment (711) first contacts the wear-resistant rubber pad (714) on the back of the clamping plate (707) to buffer the rigid impact. Then the fastening sliders (710) continue to move, and the fastening abutment... The seat (711) further presses the clamping plate (707) onto the material surface to achieve secondary locking; then manually turn the pressing handle (720) downwards, the pressing handle (720) drives the eccentric wheel (712) to rotate, the protruding part of the eccentric wheel (712) presses down on the friction plate (713), the lower end of the friction plate (713) presses tightly against the upper surface of the mounting seat (701), locking the position of the entire fastening slider (710) to prevent it from loosening due to vibration during the testing process. S3: During the testing process, the upper testing seat (10) slides up and down along the four mounting slides (6) under the drive of the control rod (5), applying a force load to the metal material on the clamping device (7); after each test, the upper testing seat (10) rises to the highest point, and its upper surface contacts and lifts the wear-resistant rubber lubricating ring (84) sleeved on the mounting slide (6). The lubricating ring (84) is fixedly connected to the insertion rod (83) through the connecting plate (89), driving the insertion rod (83) to move upward, and the top of the insertion rod (83) is pushed into the oil storage tank (82); the lubricating oil in the oil storage tank (82) flows down along the side wall of the insertion rod (83) and the oil guide groove (85) opened on the connecting plate (89), and is evenly coated on the upper surface and inner side of the lubricating ring (84). As the lubricating ring (84) slides along the mounting slide (6), the lubricating oil is evenly coated on the arc surface of the mounting slide (6), realizing automatic quantitative lubrication. S4: When the upper detection seat (10) descends for the next detection, the telescopic rod (86) fixed below the limit plate (11) is fitted with a spring (88). The elastic force of the spring (88) pushes the lubricating ring (84) back to its original position, so that the insertion rod (83) is pulled out from the oil tank (82) and stops the oil discharge. The rubber sealing ring (87) at the lower end of the oil tank (82) prevents the lubricating oil from leaking and dust from entering when not in operation. S5: When the test is completed and the material needs to be released, rotate the handle (720) in the opposite direction to release the friction plate (713) of the eccentric wheel (712), and then rotate the motor (718) and clamping motor (719) in reverse. The clamping plate (707) automatically opens under the reset force of the coil spring (721) to remove the tested material. S6: When the clamping device (7) needs to be maintained or replaced, pull up the separation plate (905). The separation plate (905) is a pointed cone. Its lower end is inserted into the two blocks (907) through the through hole (904) of the limiting block (903). The cone surface forces the two blocks (907) to overcome the attraction force of the magnetic sheet (911) and slide outward, disengaging from the mating hole (913) on the side wall of the mounting base (701). The elastic alloy reset piece (912) connected to the separation plate (905) undergoes elastic deformation after insertion, keeping the separation plate (905) in the open state. At this time, there is no lock between the limiting block (903) and the mounting base (701). The mounting base (701) is directly pulled out from the lower detection seat (4). S7: During installation, push the mounting base (701) into place, pull up the separation plate (905) to make it exit the through hole (904), the reset piece (912) springs back, and the two blocks (907) automatically reset inward under the adsorption of the magnetic piece (911). At the same time, rotate the limit block (903) to make the block (907) re-enter the mating hole (913) to complete the locking. The stop bar (909) and the fixing bolt (910) limit the rotation angle of the limit block (903) to prevent excessive rotation.

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