A composite material mold frame fatigue test bench

Abstract

The present application belongs to the technical field of mould fatigue test, and particularly relates to a composite material mould fatigue test platform, which comprises a base, a mounting frame and a hydraulic cylinder, the mounting frame is fixedly connected to the upper side wall of the base, and the hydraulic cylinder is fixedly connected to the upper side wall of the mounting frame. The present application can simulate multiple working conditions, thereby making up for the defect of single working condition of traditional test, the eccentric friction amount of the guide column can be actively adjusted through the set eccentric wear mechanism, the local wear working condition caused by long-term eccentric alignment of the guide hole of the mould can be simulated, and the tensile and compressive load can be alternately applied to the threaded hole of the mould, so that the reciprocating stress state of the opening and closing and pressure bearing of the mould is truly restored.

Description

Technical Field

[0001] This invention belongs to the field of mold fatigue testing technology, and in particular relates to a composite material mold fatigue testing platform. Background Technology

[0002] With the rapid development of the new energy vehicle industry, lightweighting, high reliability, and long lifespan have become core development trends. Compared to traditional fuel vehicles, new energy vehicles are equipped with new core components such as batteries and motors. During vehicle operation, they will experience complex mechanical conditions such as high-frequency alternating loads and instantaneous impact loads. This places more stringent requirements on the structural stability and fatigue resistance of various small forming and assembly molds. As the core tooling for component forming and precision assembly, the bolt holes and guide holes of small molds for new energy vehicles are key structures for positioning, locking, and guiding. Long-term repeated stress can easily lead to fatigue damage problems such as hole deformation, inner wall wear, and microcrack propagation. Once the mold hole fails due to fatigue, it will directly lead to deviations in the processing accuracy of automotive parts and misalignment in assembly, seriously affecting the production qualification rate of new energy vehicle parts and the operational safety of the vehicle. Therefore, after the mold is manufactured and leaves the factory, routine fatigue testing is required to detect the fatigue damage of the hole structure and verify the overall durability of the mold.

[0003] Currently, fatigue testing equipment for small mold frames in new energy vehicles faces challenges when testing bolt holes and guide holes. These areas contain multiple auxiliary components such as bushings, locating pins, and locking washers, which obstruct each other's view. This makes it impossible to directly inspect the condition of the bolt holes and guide holes after testing. The only way to detect cracks, wear, and deformation is to disassemble the entire mold frame structure and expose the inspection area. This method is not only cumbersome and labor-intensive, reducing the overall efficiency of mold frame fatigue testing and inspection, but also introduces secondary assembly errors due to frequent disassembly and reassembly of mold frame components, resulting in loss of component fit accuracy and misalignment of assembly gaps.

[0004] To address these issues, a composite material mold fatigue testing platform is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a fatigue testing bench for composite material molds.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a composite material mold frame fatigue testing platform, comprising a base, a mounting frame, and a hydraulic cylinder, wherein the mounting frame is fixedly connected to the upper side wall of the base, and the hydraulic cylinder is fixedly connected to the upper side wall of the mounting frame, and further comprising: A support component is disposed on the side wall of the base. The mold frame to be tested is placed on the upper side of the support component. The support component is located below the mounting frame. A limiting component is connected to the upper side wall of the base. The limiting component is located above the support component and the mold frame to be tested and cooperates with the support component to fix the mold frame to be tested. A first simulation component is disposed at the moving end of the hydraulic cylinder, and a second simulation component is disposed below the first simulation component.

[0007] Preferably, the supporting assembly includes multiple supporting seats, multiple T-shaped frames, and multiple rubber seats. The multiple T-shaped frames are respectively connected to both ends of the multiple supporting seats, and the multiple rubber seats are respectively connected to the upper sidewalls of the multiple supporting seats. The upper sidewall of the base has a supporting opening, and the supporting seat is located in the supporting opening. The sidewall of the supporting opening has a T-shaped groove that matches the T-shaped frame. The inner wall of the supporting opening is fixed to the T-shaped frame in the T-shaped groove by bolts.

[0008] Preferably, the limiting assembly includes two limiting frames, a limiting bracket, and two auxiliary plates. The two limiting frames are respectively fixedly connected to the front and rear sides of the upper side wall of the base. The limiting bracket has an inverted U-shaped structure, and the two ends of the limiting bracket are respectively inserted into the two limiting frames. The limiting frame is fixed to the limiting bracket by bolts. The two auxiliary plates are respectively fixedly connected to both sides of the limiting bracket.

[0009] Preferably, the first simulation component includes a tube, a lifting plate, and four guide posts. The tube is located below the hydraulic cylinder. The moving end of the hydraulic cylinder is fixedly connected to a tube that matches the tube. The tube is inserted into the tube. The tube is fixed to the tube by bolts. The lifting plate is fixedly connected to the lower side wall of the tube. The four guide posts are evenly distributed at the four corners of the lower side wall of the lifting plate. The guide posts are provided with a wear mechanism inside.

[0010] Preferably, the eccentric grinding mechanism includes two threaded cylinders, two fixing rings, two threaded rods, two push plates, and two eccentric grinding seats. The two threaded cylinders are welded together, and the internal threads of the two threaded cylinders rotate in opposite directions. The guide post has mounting holes on its sidewalls, and the two threaded cylinders are located inside the mounting holes. The two fixing rings are rotatably sleeved on the outside of the two threaded cylinders through damping bearings. The two fixing rings are connected to the inner wall of the mounting holes through brackets. The two threaded rods are threadedly sleeved inside the two threaded cylinders, and the surface threads of the two threaded rods rotate in opposite directions. The two push plates are respectively connected to the two threaded rods. The two eccentric grinding seats are connected to the two push plates through multiple damping pads. The guide post has operating grooves on its sidewalls, and the same rotating rod is rotatably connected between the operating grooves and the mounting holes. A bevel gear is fixedly connected to one end of the rotating rod located inside the mounting holes. A bevel gear ring that meshes with the bevel gear is fixedly sleeved on the outer wall of one of the threaded cylinders.

[0011] Preferably, the second simulation component includes a pressure plate, multiple pull brackets, multiple pull seats, multiple fixing frames, multiple fixing bases, and multiple threaded pins. The pressure plate is located below the lifting plate. The multiple pull brackets are evenly distributed on the upper side wall of the pressure plate. The multiple pull seats are respectively located inside the multiple pull brackets. One end of each of the multiple pull seats extending out of the pull bracket is connected to the lifting plate. The multiple fixing frames are rotatably connected to the four corners of the lower side wall of the pressure plate. The multiple fixing bases are fixed in the multiple fixing frames by bolts. The multiple threaded pins are respectively connected to the lower side wall of the multiple fixing bases. An ultrasonic component is connected to the outer wall of each threaded pin.

[0012] Preferably, the ultrasonic component includes a mounting ring, two side plates, two vertical pins, an ultrasonic generator, and an ultrasonic receiver. The mounting ring is fixed to the outer wall of the threaded pins by bolts. The two side plates are respectively fixedly connected to both sides of the mounting ring. The two vertical pins are respectively fixedly connected to the lower side walls of the two side plates. The ultrasonic generator and the ultrasonic receiver are respectively fixed to the lower ends of the two vertical pins.

[0013] Preferably, the lower sidewall of the base is bolted with multiple detection frames, the sidewall of each detection frame is fixed with multiple base plates, the upper sidewall of each base plate is fixedly connected with an adjusting cylinder, an adjusting rod is slidably disposed inside the adjusting cylinder, the adjusting cylinder is fixed to the adjusting rod by positioning bolts, the upper end of the adjusting rod is fixedly connected with a detection cylinder, the inner wall of the detection cylinder is fixedly connected with a guide ring by a bracket, a drive shaft is slidably connected inside the guide ring, the rod wall of the drive shaft has a threaded groove, the inner wall of the guide ring is fixedly connected with multiple positioning pins that match the threaded groove, the upper end of the drive shaft is fixedly connected with a rotating plate, the upper sidewall of the rotating plate is connected with a miniature electric push rod, the moving end of the miniature electric push rod is fixedly connected with a detection probe, the upper sidewall of the rotating plate is fixedly connected with a connecting frame, the upper sidewall of the connecting frame is rotatably connected with a locking cylinder, and the locking cylinder is connected to a guide post by a snap-fit ​​assembly.

[0014] Preferably, the snap-fit ​​assembly includes two snap-fit ​​cylinders, two snap-fit ​​seats, multiple snap-fit ​​teeth, a locking pin, and multiple toothed rings. The two snap-fit ​​cylinders are respectively connected to the left and right sides of the locking cylinder. The two snap-fit ​​seats are connected to the two snap-fit ​​cylinders by springs. The multiple snap-fit ​​teeth are evenly distributed on the side walls of the two snap-fit ​​seats. The locking pin is fixedly connected to the lower end of the guide post. The multiple toothed rings are evenly distributed on the outer wall of the locking pin. A permanent magnet is connected to the side wall of the snap-fit ​​seat, and an electromagnetic block is connected to the inner wall of the snap-fit ​​cylinder.

[0015] Compared with existing technologies, the advantages of a composite material mold fatigue testing bench are: 1. This invention can perform fatigue simulation under multiple working conditions, thereby overcoming the shortcomings of traditional single working conditions. Through the set eccentric wear mechanism, the eccentric friction of the guide column can be actively adjusted to simulate the local wear condition caused by long-term eccentric alignment of the guide hole of the mold frame. At the same time, tensile and compressive loads can be alternately applied to the threaded hole of the mold frame to truly restore the reciprocating force state of the mold frame opening and closing and bearing pressure.

[0016] 2. The present invention adopts a sliding adjustable bearing component, which can flexibly adjust the support point according to the size of the specimen and the position of the test hole, thereby avoiding the test area and realizing unobstructed testing of all holes. At the same time, the flexible support combined with the upper and lower bidirectional limiting structure fully fixes the specimen during the test, avoiding the specimen shaking or shifting during reciprocating loading, and ensuring the stability of the test.

[0017] 3. This invention can perform ultrasonic non-destructive testing on threaded holes during fatigue loading, detect latent damage caused by fatigue in threaded holes in real time, and automatically perform wear detection on the inner wall of the guide hole after the guide hole test is completed. It does not require repeated disassembly and assembly of the mold frame, effectively reducing detection errors and avoiding the problems of loss of component fitting accuracy, assembly gap offset and secondary assembly error of the mold frame caused by frequent disassembly and assembly of mold frame components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a composite material mold frame fatigue testing platform provided by the present invention; Figure 2 This is a schematic diagram of the structure of the first simulation component and the second simulation component in this invention; Figure 3 This is a schematic diagram of the internal structure of the guide post in this invention; Figure 4 This is a schematic diagram of the ultrasonic component in this invention; Figure 5 This is a schematic diagram of the limiting component in this invention; Figure 6 This is a schematic diagram of the structure of the load-bearing component in this invention; Figure 7 This is a schematic diagram of the surface structure of the detection frame in this invention; Figure 8 This is a schematic diagram of the internal structure of the detection cylinder in this invention; Figure 9 yes Figure 8 An enlarged schematic diagram of part A in the middle; Figure 10 yes Figure 8 Enlarged diagram of part B.

[0019] In the diagram: 1. Base, 2. Mounting bracket, 3. Hydraulic cylinder, 4. Bearing assembly, 401. Bearing seat, 402. T-shaped frame, 5. Rubber seat, 6. Bearing port, 7. T-slot, 8. Limiting assembly, 81. Limiting frame, 82. Limiting bracket, 9. Auxiliary plate, 10. First simulation assembly, 101. Insert cylinder, 102. Lifting plate, 11. Guide column, 12. Insert column, 13. Eccentric grinding mechanism, 131. Threaded cylinder, 132. Fixing ring, 14. Threaded rod, 15. Push plate, 16. Eccentric grinding seat, 17. Damping pad, 18. Operating groove, 19. Rotating rod, 20. Bevel gear, 21. Bevel gear ring, 22. Second simulation assembly, 221. Pressure plate, 222. Tie bracket, 2 3. Pull base, 24. Fixing frame, 25. Fixing seat, 26. Threaded pin, 27. Ultrasonic assembly, 271. Mounting ring, 272. Side plate, 28. Vertical pin, 29. Ultrasonic generator, 30. Ultrasonic receiver, 31. Detection frame, 32. Base plate, 33. Adjusting cylinder, 34. Adjusting rod, 35. Detection cylinder, 36. Guide ring, 37. Drive shaft, 38. Threaded groove, 39. Positioning pin, 40. Rotating plate, 41. Miniature electric push rod, 42. Detection probe, 43. Connecting frame, 44. Locking cylinder, 45. Snap-fit ​​assembly, 451. Snap-fit ​​cylinder, 452. Snap-fit ​​seat, 46. Snap-fit ​​tooth, 47. Tooth ring, 48. Permanent magnet, 49. Electromagnetic block, 50. Locking pin. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] like Figure 1 , Figure 5 and Figure 6As shown, a composite material mold fatigue testing bench includes a base 1, a mounting frame 2, and a hydraulic cylinder 3. The mounting frame 2 is fixedly connected to the upper side wall of the base 1, and the hydraulic cylinder 3 is fixedly connected to the upper side wall of the mounting frame 2. It also includes a load-bearing component 4, disposed on the side wall of the base 1. The mold to be tested is placed on the upper side of the load-bearing component 4, which is located below the mounting frame 2. A limiting component 8 is connected to the upper side wall of the base 1, located above the load-bearing component 4 and the mold to be tested, and cooperates with the load-bearing component 4 to fix the mold to be tested. The load-bearing component 4 includes multiple load seats 401, multiple T-shaped frames 402, and multiple rubber seats 5. The multiple T-shaped frames 402 are respectively connected to both ends of the multiple load seats 401. Each rubber seat 5 is connected to the upper side wall of multiple bearing seats 401. The upper side wall of the base 1 has a bearing opening 6, and the bearing seat 401 is located in the bearing opening 6. The side wall of the bearing opening 6 has a T-shaped groove 7 that matches the T-shaped frame 402. The inner wall of the bearing opening 6 is fixed to the T-shaped frame 402 in the T-shaped groove 7 by bolts. The limiting component 8 includes two limiting frames 81, a limiting frame 82, and two auxiliary plates 9. The two limiting frames 81 are fixedly connected to the front and rear sides of the upper side wall of the base 1, respectively. The limiting frame 82 has an inverted U-shaped structure. The two ends of the limiting frame 82 are respectively inserted into the two limiting frames 81. The limiting frames 81 are fixed to the limiting frame 82 by bolts. The two auxiliary plates 9 are fixedly connected to the two sides of the limiting frame 82, respectively.

[0022] In actual use, before testing, the installation position of the bearing seat 401 can be flexibly adjusted inside the bearing port 6 according to the size and specifications of the mold frame to be tested, and the detection positions of the threaded holes and guide holes. This avoids all detection holes to be tested, completely eliminating the problem of tooling obstructing the detection area and ensuring that all holes can be measured. After the position adjustment is completed, the T-shaped frame 402 is locked in the T-slot 7 with bolts. Utilizing the limiting and anti-detachment characteristics of the T-shaped structure, it is ensured that the bearing seat 401 does not shift or loosen under force. The mold frame to be tested is then placed on top of the rubber seat 5, relying on the flexible buffering characteristics of the rubber seat 5. Flexible support is achieved to effectively protect the surface structure of the composite material mold frame and avoid damage and cracking of the specimen by rigid clamping. Then, the two ends of the inverted U-shaped limiting frame 82 are inserted and fixed in the limiting frames 81 on the front and rear sides. With the auxiliary plates 9 on both sides, the limiting coverage area is increased, and a vertical pressing limiting structure is formed with the bearing component 4 below. This completely locks the degree of freedom of the mold frame under test and eliminates the problems of specimen movement, displacement and vibration during fatigue reciprocating test. It realizes universal adjustable clamping of multi-specification mold frames, unobstructed detection, flexible protection and high-strength positioning, and improves the versatility and stability of the test fixture.

[0023] like Figure 2As shown, further, in this embodiment, the first simulation component 10 is disposed at the moving end of the hydraulic cylinder 3. The first simulation component 10 includes a tube 101, a lifting plate 102 and four guide posts 11. The tube 101 is located below the hydraulic cylinder 3. The moving end of the hydraulic cylinder 3 is fixedly connected to a tube 12 that matches the tube 101. The tube 12 is inserted into the tube 101. The tube 101 is fixed to the tube 12 by bolts. The lifting plate 102 is fixedly connected to the lower side wall of the tube 101. The four guide posts 11 are evenly distributed at the four corners of the lower side wall of the lifting plate 102.

[0024] In actual use, the lifting plate 102 and the moving end of the hydraulic cylinder 3 are assembled by inserting and locking the insert 101 and the insert post 12. The assembly and disassembly are convenient and the coaxiality is high. During the test, the hydraulic cylinder 3 drives the lifting plate 102 to move vertically back and forth, so that the four corner guide posts 11 are inserted into the guide holes of the mold frame to be tested and slide back and forth. This simulates the working condition of the guide posts 11 and the guide holes frequently opening and closing and sliding in the actual work of the mold frame, ensuring that the test force is uniform and the sliding trajectory is stable, and providing a positioning basis for subsequent guide hole wear fatigue test and uneven wear simulation test.

[0025] like Figure 2 and Figure 4 As shown, further, in this embodiment, a second simulation component 22 is provided below the first simulation component 10. The second simulation component 22 includes a pressure plate 221, multiple pull brackets 222, multiple pull seats 23, multiple fixing frames 24, multiple fixing seats 25, and multiple threaded pins 26. The pressure plate 221 is located below the lifting plate 102. The multiple pull brackets 222 are evenly distributed on the upper side wall of the pressure plate 221. The multiple pull seats 23 are respectively located inside the multiple pull brackets 222. One end of each pull seat 23 extending out of the pull bracket 222 is connected to the lifting plate 102. The multiple fixing frames 24 are rotatably connected to the four corners of the lower side wall of the pressure plate 221. The mounting bases 25 are all fixed in multiple mounting frames 24 by bolts. Multiple threaded pins 26 are respectively connected to the lower side walls of multiple mounting bases 25. The outer wall of the threaded pins 26 is connected to an ultrasonic component 27. The ultrasonic component 27 includes a mounting ring 271, two side plates 272, two vertical pins 28, an ultrasonic generator 29, and an ultrasonic receiver 30. The mounting ring 271 is fixed to the outer wall of the threaded pins 26 by bolts. The two side plates 272 are respectively fixedly connected to both sides of the mounting ring 271. The two vertical pins 28 are respectively fixedly connected to the lower side walls of the two side plates 272. The ultrasonic generator 29 and the ultrasonic receiver 30 are respectively fixed to the lower ends of the two vertical pins 28.

[0026] In actual use, multiple threaded pins 26 are screwed into the threaded holes of the mold frame to be tested and adjusted to a uniform angle so that the fixed seats 25 face the same direction. Then, the mounting ring 271 of the ultrasonic component 27 is fixed to the outside of the corresponding threaded pin 26, so that the ultrasonic generator 29 and the ultrasonic receiver 30 are symmetrically placed on both sides of the threaded hole. Then, the lifting plate 102 is driven down to the set position by the hydraulic cylinder 3. Then, the operator moves the pressure plate 221 horizontally to the appropriate position, so that the pressure plate 221 drives the pull frame 222 to move. During the movement of the pull frame 222, the pull seat 23 will slide into the corresponding pull frame 222, and the pressure plate 221 will drive the fixed frame 24 to move to the outside of the corresponding fixed seat 25. The fixed frame 24 and the fixed seat 25 are bolted and fixed to complete the overall assembly. During the test, when the hydraulic cylinder 3 drives the lifting plate 102 upward, it applies an upward pulling force to the pressure plate 221 and the threaded pin 26 through the pull seat 23 and the pull bracket 222, simulating the tensile fatigue condition of the threaded hole of the mold frame. When the hydraulic cylinder 3 drives the lifting plate 102 downward, it applies a downward pressure to the threaded pin 26, simulating the compressive fatigue condition of the threaded hole, realizing the reciprocating tensile and compressive composite fatigue test, which closely matches the actual complex stress condition of the mold frame. At the same time, the ultrasonic component 27 works synchronously throughout the process, emitting ultrasonic waves through the ultrasonic generator 29 and receiving the echoes through the ultrasonic receiver 30, and monitoring in real time whether microcracks, delamination, and fatigue damage occur in the composite material around the threaded hole, realizing the simultaneous performance of fatigue testing and non-destructive testing.

[0027] like Figure 2 and Figure 3 As shown, further, in this embodiment, the guide post 11 is provided with an eccentric wear mechanism 13. The eccentric wear mechanism 13 includes two threaded cylinders 131, two fixing rings 132, two threaded rods 14, two push plates 15, and two eccentric wear seats 16. The two threaded cylinders 131 are welded together, and the internal threads of the two threaded cylinders 131 rotate in opposite directions. The side wall of the guide post 11 is provided with mounting holes, and the two threaded cylinders 131 are located in the mounting holes. The two fixing rings 132 are rotatably sleeved on the outside of the two threaded cylinders 131 through damping bearings. The two fixing rings 132 are connected to the bracket and the mounting hole. The inner wall is connected, and the two threaded rods 14 are threadedly sleeved in the two threaded cylinders 131. The threads on the surfaces of the two threaded rods 14 have opposite directions. The two push plates 15 are respectively connected to the two threaded rods 14. The two eccentric bearings 16 are connected to the two push plates 15 through multiple damping pads 17. The side wall of the guide post 11 is provided with an operating groove 18. The same rotating rod 19 is rotatably connected between the operating groove 18 and the mounting hole. One end of the rotating rod 19 located in the mounting hole is fixedly connected to a bevel gear 20. The outer wall of one of the threaded cylinders 131 is fixedly sleeved with a bevel gear ring 21 that meshes with the bevel gear 20.

[0028] In actual use, due to the common problems of installation eccentricity and alignment deviation in the actual use of mold frames, the guide holes are severely worn. Existing equipment cannot simulate this situation. In this device, the experimenters can test the degree of wear caused by different degrees of alignment deviation of the guide holes according to their needs. The operator can rotate the rotating rod 19 as needed (the end of the rotating rod 19 is connected to a rotating block for easy rotation). The rotating rod 19 drives the bevel gear 20 to mesh and drive the bevel gear ring 21 to rotate, which in turn drives the two sets of threaded cylinders 131 with opposite internal threads to rotate synchronously. This drives the two threaded rods 14 to push the push plate 15 outward. Through the push plate 15 and the damping pad 17, the eccentric wear seat 16 is driven to extend outward to the set eccentric position. The damping bearing and the damping pad 17 ensure that the structure does not spring back or loosen after adjustment, and the eccentricity remains stable. During the reciprocating sliding process of the guide column 11, the outer eccentric wear seat 16 is in contact with the guide hole wall and rubs against it, simulating the eccentric wear and local overload wear conditions caused by installation eccentricity and alignment deviation, and realizing the comparative test of guide hole fatigue wear under different degrees of eccentricity.

[0029] like Figures 7-10 As shown, further, in this embodiment, multiple detection frames 31 are bolted to the lower sidewall of the base 1. Multiple base plates 32 are fixed to the sidewall of the detection frames 31. An adjusting cylinder 33 is fixedly connected to the upper sidewall of the base plate 32. An adjusting rod 34 is slidably disposed inside the adjusting cylinder 33. The adjusting cylinder 33 is fixed to the adjusting rod 34 by positioning bolts. A detection cylinder 35 is fixedly connected to the upper end of the adjusting rod 34. A guide ring 36 is fixedly connected to the inner wall of the detection cylinder 35 by a bracket. A drive shaft 37 is slidably connected inside the guide ring 36. A threaded groove 38 is opened on the rod wall of the drive shaft 37. Multiple positioning pins 39 that match the threaded groove 38 are fixedly connected to the inner wall of the guide ring 36. A rotating plate 40 is fixedly connected to the upper end of the drive shaft 37. A miniature electric push rod 41 is connected to the upper sidewall of the rotating plate 40. A detection probe 42 is fixedly connected to the mobile end. A connecting frame 43 is fixedly connected to the upper side wall of the rotating plate 40. A locking cylinder 44 is rotatably connected to the upper side wall of the connecting frame 43. The locking cylinder 44 is connected to the guide post 11 through a snap-fit ​​assembly 45. The snap-fit ​​assembly 45 includes two snap-fit ​​cylinders 451, two snap-fit ​​seats 452, multiple snap-fit ​​teeth 46, a locking pin 50, and multiple toothed rings 47. The two snap-fit ​​cylinders 451 are respectively connected to the left and right sides of the locking cylinder 44. The two snap-fit ​​seats 452 are both connected to the two snap-fit ​​cylinders 451 by springs. Multiple snap-fit ​​teeth 46 are evenly distributed on the side walls of the two snap-fit ​​seats 452. The locking pin 50 is fixedly connected to the lower end of the guide post 11. Multiple toothed rings 47 are evenly distributed on the outer wall of the locking pin 50. A permanent magnet 48 is connected to the side wall of the snap-fit ​​seat 452. An electromagnetic block 49 is connected to the inner wall of the snap-fit ​​cylinder 451.

[0030] In actual use, the test frame 31 is fixed to the bottom of the base 1 with bolts. Then, the guide column 11 is controlled by the hydraulic cylinder 3 to pass through the guide hole on the surface of the mold frame to be tested. The operator puts the corresponding test cylinder 35 on the outside of the guide column 11 and makes the upper end of the test cylinder 35 press against the lower side wall of the mold frame to be tested. Then, the adjusting cylinder 33 and the base plate 32 are pulled down so that the base plate 32 contacts the upper side wall of the test frame 31. Then, the bolts are rotated to fix the adjusting rod 34 and the adjusting cylinder 33 relative to each other. When the guide column 11 slides in the guide hole a set number of times, the wear degree of the guide hole needs to be tested. During testing, the external controller de-energizes and demagnetizes the electromagnetic block 49, releasing it from the permanent magnet 48. The locking seat 452 is then pushed out by the spring force. Subsequently, the hydraulic cylinder 3 slowly moves the guide post 11 and locking pin 50 downwards to a set position, causing the locking teeth 46 to engage with the outer toothed ring 47 of the locking pin 50. Then, through the engagement of the toothed ring 47 and the locking teeth 46, the guide post 11 and locking pin 50 move upwards, pulling the locking cylinder 44 upwards as a whole. This drives the drive shaft 37 to move vertically along the guide ring 36, via the spiral groove 38 and the positioning pin 39. With the coordinated structure, the drive shaft 37 will automatically rotate during the upward movement, thereby driving the rotating plate 40, the miniature electric push rod 41 and the detection probe 42 to rotate and rise synchronously. When the detection probe 42 moves to the guide hole, the control hydraulic cylinder 3 stops working, and the miniature electric push rod 41 pushes the detection probe 42 to fit against the guide hole wall. The hydraulic cylinder 3 is restarted to run at a low speed (moving speed of 0.5cm / s), so that the detection probe 42 rotates and moves axially along the inner wall of the guide hole, realizing the wear detection of the inner wall of the guide hole. It can collect data on eccentric wear, uniform wear and local fatigue damage.

[0031] The operating principle of the present invention is explained as follows: According to the specifications of the mold frame to be tested, the position of each set of bearing seats 401 in the bearing port 6 of the base 1 is adjusted and locked and fixed by the T-shaped frame 402, so that the rubber seat 5 flexibly supports the mold frame. Then, the limiting frame 81 of the limiting component 8 cooperates with the inverted U-shaped limiting frame 82 to press and fix the test piece, so as to achieve unobstructed, anti-displacement and stable clamping. Subsequently, the hydraulic cylinder 3 on the mounting frame 2 provides reciprocating power, which drives the lifting plate 102 and the four corner guide posts 11 of the first simulation component 10 to slide back and forth in the guide hole of the mold frame through the docking of the insert post 12 and the insert cylinder 101. At the same time, the threaded cylinder 131 can be rotated by rotating the rotating rod 19, which drives the threaded cylinder 131 to rotate through the bevel gear 20 and bevel gear ring 21. The threaded rod 14 pushes the eccentricity seat 16 to extend outward to adjust the eccentricity, simulating the eccentricity fatigue condition caused by the actual assembly deviation of the guide hole. Meanwhile, the lifting plate 102 can drive the bearing plate 221 and the lower threaded pin 26 of the second simulation component 22 through the pull seat 23 and the pull bracket 222 to complete the reciprocating tension and compression composite fatigue loading on the threaded hole of the mold frame. The ultrasonic component 27 on the outside of the threaded pin 26 can monitor the microcracks, delamination and other hidden fatigue damage around the threaded hole in real time through the ultrasonic generator 29 and the ultrasonic receiver 30. After the fatigue test, the locking pin 50 at the lower end of the guide post 11 is fixed by the snap-fit ​​assembly 45. The drive shaft 37 is spirally raised and lowered by the cooperation of the threaded groove 38 and the positioning pin 39. The detection probe 42 is pushed along the inner wall of the guide hole by the miniature electric push rod 41 to rotate and move axially, so as to realize the automatic detection of the wear of the guide hole.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fatigue testing bench for composite material molds, comprising a base (1), a mounting frame (2), and a hydraulic cylinder (3), wherein the mounting frame (2) is fixedly connected to the upper side wall of the base (1), and the hydraulic cylinder (3) is fixedly connected to the upper side wall of the mounting frame (2), characterized in that, Also includes: The support component (4) is disposed on the side wall of the base (1). The mold frame to be tested is placed on the upper side of the support component (4). The support component (4) is located below the mounting frame (2). The upper side wall of the base (1) is connected to the limiting component (8). The limiting component (8) is located above the support component (4) and the mold frame to be tested, and cooperates with the support component (4) to fix the mold frame to be tested. A first simulation component (10) is disposed at the moving end of the hydraulic cylinder (3). A second simulation component (22) is disposed below the first simulation component (10). The first simulation component (10) includes a tube (101), a lifting plate (102), and four guide posts (11). The tube (101) is located below the hydraulic cylinder (3). The moving end of the hydraulic cylinder (3) is fixedly connected to a tube (12) that matches the tube (101). The tube (12) is inserted into the tube (101). The tube (101) is fixed to the tube (12) by bolts. The lifting plate (102) is fixedly connected to the lower side wall of the tube (101). The four guide posts (11) are evenly distributed on the lifting plate. At the four corners of the lower side wall of the lower plate (102), the guide post (11) is provided with a grinding mechanism (13). The grinding mechanism (13) includes two threaded cylinders (131), two fixing rings (132), two threaded rods (14), two push plates (15), and two grinding seats (16). The two threaded cylinders (131) are welded together, and the internal threads of the two threaded cylinders (131) are opposite in direction. The side wall of the guide post (11) is provided with a mounting hole. The two threaded cylinders (131) are located in the mounting hole. The two fixing rings (132) are rotatably sleeved on the outside of the two threaded cylinders (131) through damping bearings. The two fixing rings (132) are connected to the inner wall of the mounting hole through a bracket. The threaded rods (14) are threadedly sleeved in the two threaded cylinders (131), and the threads on the surfaces of the two threaded rods (14) have opposite directions. The two push plates (15) are connected to the two threaded rods (14) respectively. The two wear seats (16) are connected to the two push plates (15) through multiple damping pads (17). The side wall of the guide post (11) is provided with an operating groove (18). The same rotating rod (19) is rotatably connected between the operating groove (18) and the mounting hole. One end of the rotating rod (19) located in the mounting hole is fixedly connected to a bevel gear (20). The outer wall of one of the threaded cylinders (131) is fixedly sleeved with a bevel gear ring (21) that meshes with the bevel gear (20). The second simulation component ( 22) Includes a pressure plate (221), multiple tie rods (222), multiple tie seats (23), multiple fixing frames (24), multiple fixing seats (25), and multiple threaded pins (26). The pressure plate (221) is located below the lifting plate (102). The multiple tie rods (222) are evenly distributed on the upper side wall of the pressure plate (221). The multiple tie seats (23) are respectively located inside the multiple tie rods (222). One end of each tie seat (23) extending out of the tie rod (222) is connected to the lifting plate (102). The multiple fixing frames (24) are rotatably connected to the four corners of the lower side wall of the pressure plate (221). The multiple fixing seats (25) are fixed inside the multiple fixing frames (24) by bolts.Multiple threaded pins (26) are respectively connected to the lower sidewalls of multiple fixed seats (25). An ultrasonic component (27) is connected to the outer wall of each threaded pin (26). The ultrasonic component (27) includes a mounting ring (271), two side plates (272), two vertical pins (28), an ultrasonic generator (29), and an ultrasonic receiver (30). The mounting ring (271) is fixed to the outer wall of the threaded pin (26) by bolts. The two side plates (272) are respectively fixedly connected to both sides of the mounting ring (271). The two vertical pins (28) are respectively fixedly connected to the lower sidewalls of the two side plates (272). The ultrasonic generator (29) and the ultrasonic receiver (30) are respectively fixed to the lower ends of the two vertical pins (28).

2. The composite material mold frame fatigue testing bench according to claim 1, characterized in that, The bearing assembly (4) includes multiple bearing seats (401), multiple T-shaped frames (402), and multiple rubber seats (5). The multiple T-shaped frames (402) are respectively connected to both ends of the multiple bearing seats (401), and the multiple rubber seats (5) are respectively connected to the upper sidewall of the multiple bearing seats (401). The upper sidewall of the base (1) is provided with a bearing opening (6), and the bearing seat (401) is located in the bearing opening (6). The sidewall of the bearing opening (6) is provided with a T-shaped groove (7) that matches the T-shaped frame (402). The inner wall of the bearing opening (6) is fixed to the T-shaped frame (402) in the T-shaped groove (7) by bolts.

3. The composite material mold frame fatigue testing bench according to claim 1, characterized in that, The limiting component (8) includes two limiting frames (81), a limiting bracket (82), and two auxiliary plates (9). The two limiting frames (81) are fixedly connected to the front and rear sides of the upper side wall of the base (1). The limiting bracket (82) has an inverted U-shaped structure. The two ends of the limiting bracket (82) are respectively inserted into the two limiting frames (81). The limiting frames (81) are fixed to the limiting bracket (82) by bolts. The two auxiliary plates (9) are fixedly connected to the two sides of the limiting bracket (82).

4. The composite material mold frame fatigue testing bench according to claim 1, characterized in that, The lower sidewall of the base (1) is bolted with multiple testing frames (31). Multiple base plates (32) are fixed to the sidewall of the testing frames (31). An adjusting cylinder (33) is fixedly connected to the upper sidewall of the base plate (32). An adjusting rod (34) is slidably provided inside the adjusting cylinder (33). The adjusting cylinder (33) is fixed to the adjusting rod (34) by positioning bolts. A testing cylinder (35) is fixedly connected to the upper end of the adjusting rod (34). A guide ring (36) is fixedly connected to the inner wall of the testing cylinder (35) by a bracket. A drive shaft (37) is slidably connected inside the guide ring (36). The rod wall is provided with a threaded groove (38). The inner wall of the guide ring (36) is fixedly connected with a number of positioning pins (39) that match the threaded groove (38). The upper end of the drive shaft (37) is fixedly connected with a rotating plate (40). The upper side wall of the rotating plate (40) is connected with a miniature electric push rod (41). The moving end of the miniature electric push rod (41) is fixedly connected with a detection probe (42). The upper side wall of the rotating plate (40) is fixedly connected with a connecting frame (43). The upper side wall of the connecting frame (43) is rotatably connected with a locking cylinder (44). The locking cylinder (44) is connected to the guide post (11) through a snap-fit ​​assembly (45).

5. The composite material mold frame fatigue testing bench according to claim 4, characterized in that, The snap-fit ​​assembly (45) includes two snap-fit ​​cylinders (451), two snap-fit ​​seats (452), multiple snap-fit ​​teeth (46), a locking pin (50), and multiple toothed rings (47). The two snap-fit ​​cylinders (451) are respectively connected to the left and right sides of the locking cylinder (44). The two snap-fit ​​seats (452) are connected to the two snap-fit ​​cylinders (451) by springs. The multiple snap-fit ​​teeth (46) are evenly distributed on the side walls of the two snap-fit ​​seats (452). The locking pin (50) is fixedly connected to the lower end of the guide post (11). The multiple toothed rings (47) are evenly distributed on the outer wall of the locking pin (50). The side wall of the snap-fit ​​seat (452) is connected to a permanent magnet (48), and the inner wall of the snap-fit ​​cylinder (451) is connected to an electromagnetic block (49).

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