An automatic pressure applying device for glass cover plate surface hardness detection

Abstract

This invention relates to the field of glass cover plate testing technology, and discloses an automatic pressure application device for testing the surface hardness of glass covers. The device includes a base, with columns fixedly installed on both sides of the top of the base. The outer diameters of the columns are movably mounted on both ends of a movable platform. The tops of the columns are fixedly installed on both sides of the bottom of a crossbeam. Rotating frames are movably installed on both ends of the crossbeam. First chambers are formed on both sides of the interior of each crossbeam. Spring plates are fixedly installed on both sides of the interior of each first chamber, with the ends of the spring plates extending into the interior of the corresponding rotating frames. Pressure rollers are fixedly installed on one side of the inner bottom of each rotating frame, with the tops of the rollers abutting against the lower surface of the corresponding spring plates. This invention allows for flexible pressure adjustment and stable pressure during pressure holding. It can collect test data in real time, has a high degree of automation, wide adaptability, and significantly improves the safety, accuracy, and efficiency of glass cover plate hardness testing.

Description

Technical Field

[0001] This invention relates to the field of glass cover plate testing technology, specifically to an automatic pressure application device for testing the surface hardness of glass cover plates. Background Technology

[0002] In consumer electronics, automotive electronics, and other fields, glass covers serve as critical protective and aesthetic components, and their surface hardness directly affects the product's scratch resistance, impact resistance, and lifespan. As end products become thinner, lighter, and more durable, glass cover materials have been upgraded from ordinary soda-lime glass to special materials such as reinforced aluminosilicate glass, resulting in significant differences in hardness levels. This places increasingly stringent requirements on the accuracy, stability, and adaptability of testing technologies. Current glass cover plate hardness testing devices have significant shortcomings: In terms of fixing methods, rigid clamps easily cause glass breakage, and single-adhesion methods can easily lead to glass displacement; the pressure application mechanism lacks precise adjustment capabilities, making it difficult to adapt the fixed pressure to glass of different hardness, and manual adjustment results in large errors; during the pressure holding stage, there is no effective pressure compensation, and glass deformation causes pressure fluctuations, leading to irregular indentations and low reliability of test data. These problems seriously affect the accuracy of test results and make it difficult to meet quality control requirements. Meanwhile, existing equipment suffers from low automation, relying heavily on manual labor for everything from glass fixing to testing and resetting. This not only results in high labor costs and significant operational errors but also fails to keep pace with the high-efficiency testing rhythm of mass production lines, hindering production efficiency improvements. Therefore, developing an automated pressure testing device for glass cover plates that can achieve stable fixing, precise pressure application, and consistent, automated pressure has become an urgent need for the industry. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an automatic pressure application device for testing the surface hardness of glass covers. This device solves the problems of existing devices, such as fixing fragile glass, difficulty in adapting pressure to glass with varying hardness, unstable pressure holding, low automation leading to inaccurate testing, and low efficiency, thus meeting the requirements for accurate and efficient testing.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic pressure device for testing the surface hardness of a glass cover plate, comprising a base, on both sides of the top of the base being fixedly mounted with columns, the outer diameters of the columns being movably mounted at both ends of a movable platform, the top ends of the columns being fixedly mounted on both sides of the bottom of a crossbeam, a crossbeam being fixedly mounted in the middle of the movable platform, rotating frames being movably mounted at both ends of the crossbeam, and first chambers being formed on both sides of the interior of the crossbeam, with spring plates fixedly mounted on both sides of the interior of the first chamber, the ends of the spring plates extending into the interior of the corresponding rotating frames, and pressure rollers fixedly mounted on one side of the bottom of the rotating frames. The top ends of the rollers all abut against the lower surface of the corresponding spring plates. The bottom of the rotating frame is movably mounted with a connecting plate, and the end of the connecting plate is movably mounted with a pressure rod. The end of the pressure rod extends to the outside of the movable platform and is fixedly mounted at both ends of the pressure head connecting rod. A four-sided pyramidal pressure head is fixedly mounted at the bottom end of the pressure head connecting rod. A short shaft is movably mounted in the middle of the first chamber. A lead screw is fixedly mounted on the outer end of the short shaft. A support platform is threaded onto the outer diameter of the lead screw, and both ends of the support platform abut against the upper surface of the corresponding spring plates. Positioning platforms are also movably mounted on both sides of the upper surface of the base via guide rails. Positioning grooves are opened on the inner side of each positioning platform.

[0005] Preferably, a hydraulic cylinder is fixedly installed at the top center of the crossbeam, and the driving end of the hydraulic cylinder extends to the bottom of the crossbeam and is fixedly installed at the top center of the movable platform.

[0006] Preferably, a pressure sensor is fixedly installed between the pressure head connecting rod and the four-sided pyramid pressure head, and a displacement sensor is fixedly installed at the top of the pressure head connecting rod.

[0007] Preferably, a second chamber is provided in the middle of the cross frame, an adjustment motor is fixedly installed at the front end of the movable platform, the drive end of the adjustment motor extends into the interior of the second chamber and is fixedly installed with a driving bevel gear, the inner ends of the short shafts all extend into the interior of the second chamber and are fixedly installed with driven bevel gears, and the two ends of the driving bevel gear are respectively meshed with the inner ends of the two driven bevel gears.

[0008] Preferably, a plurality of pneumatic suction nozzles are fixedly installed on the bottom wall of the positioning groove, an airbag is fixedly installed on the top wall of the positioning groove, and an industrial camera is fixedly installed at the top center of the base.

[0009] Preferably, a bidirectional threaded rod is movably installed inside the base, and movable blocks are threaded onto the outer diameter of both sides of the bidirectional threaded rod. Straight slots are opened at the positions directly below the positioning platform on both sides of the top of the base. A fixing rod is fixedly installed at the top of each movable block. The end of each fixing rod passes through the interior of the corresponding straight slot and is fixedly installed at the bottom of the corresponding positioning platform. A DC motor is fixedly installed on one side of the base, and the drive end of the DC motor extends into the interior of the base and is fixedly installed at one end of the bidirectional threaded rod.

[0010] This invention provides an automatic pressure application device for testing the surface hardness of glass cover plates. It has the following beneficial effects: 1. This invention employs a dual fixing structure of "pneumatic suction nozzle + airbag pressing" to provide a uniform, gentle, and stable fixing effect for the glass cover plate, ensuring a tight fit at the bottom of the glass cover plate and preventing displacement during the testing process. The airbag on the top wall of the positioning groove is inflated and presses the glass cover plate from above. By adjusting the airbag pressure, it can be adapted to glass cover plates of different thicknesses and materials. The flexible nature of the airbag can form a buffer, which, combined with the uniform suction force of the pneumatic suction nozzle, avoids the problem of local pressure concentration caused by traditional rigid fixing methods and prevents the glass cover plate from cracking due to improper fixing during the testing process, significantly improving the safety and integrity of the glass cover plate during the testing process.

[0011] 2. This invention constructs a flexible and precise pressure application system through the synergistic effect of hydraulic cylinder drive and spring plate elasticity conversion, realizing stable pressure transmission. At the same time, it can accurately control the pressure according to the requirements of glass cover plates with different hardness levels and different testing standards. The adjustment range from low pressure to high pressure is wide, meeting diverse testing scenarios and breaking the limitations of traditional fixed pressure testing devices.

[0012] 3. The present invention uses a relative sliding design between the pressure roller and the spring plate. This dynamic compensation mechanism ensures that the elastic force generated by the spring plate remains consistent throughout the process. Even if the position of the pyramidal indenter changes during the pressure holding stage, the pressure acting on the surface of the glass cover plate can still be uniform and stable. This avoids problems such as indentation deformation and uneven depth caused by pressure fluctuations, and provides a precise detection basis for subsequent capture of indentation images and calculation of hardness data by an industrial camera, significantly improving the accuracy and reliability of the detection results. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of the movable platform in this invention; Figure 4This is a schematic diagram of the internal structure of the movable platform in this invention; Figure 5 for Figure 4 Enlarged view at point B in the middle; Figure 6 This is a schematic diagram of the internal structure of the second chamber in this invention; Figure 7 This is a schematic diagram of the internal structure of the base in this invention.

[0014] The components include: 1. Base; 2. Column; 3. Movable platform; 4. Crossbeam; 5. Hydraulic cylinder; 6. Horizontal frame; 7. Rotating frame; 8. First chamber; 9. Spring plate; 10. Pressure roller; 11. Connecting plate; 12. Pressure rod; 13. Pressure head connecting rod; 14. Four-sided pyramidal pressure head; 15. Pressure sensor; 16. Displacement sensor; 17. Short shaft; 18. Lead screw; 19. Support platform; 20. Second chamber; 21. Adjusting motor; 22. Driving bevel gear; 23. Driven bevel gear; 24. Guide rail; 25. Positioning platform; 26. Positioning groove; 27. Pneumatic suction nozzle; 28. Airbag; 29. ​​Industrial camera; 30. Bidirectional threaded rod; 31. Movable block; 32. Straight groove; 33. DC motor. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example: Please see the appendix Figure 1 -Appendix Figure 7 This invention provides an automatic pressure application device for testing the surface hardness of glass cover plates, such as... Figure 1As shown, the device includes a base 1, which serves as the basic support structure for the entire device, providing a stable mounting platform for all components above it. This ensures that the device's testing accuracy is not affected by factors such as vibration during the testing process. Columns 2 are fixedly installed on both sides of the top of the base 1. Columns 2 provide vertical support and guidance, providing stable trajectory constraints for the up-and-down movement of the movable platform 3, preventing the platform 3 from deviating during movement. The outer diameters of the columns 2 are movably installed at both ends of the movable platform 3. The movable platform 3 is the core carrier for bearing the pressure-related components. Subsequent components such as the crossbeam 6 and rotating frame 7 are installed inside it. Vertical displacement for the pressure action is achieved by sliding up and down along the columns 2. The tops of the columns 2 are fixedly installed on both sides of the bottom of the crossbeam 4. The crossbeam 4 serves as the top support structure, providing a fixed mounting position for the hydraulic cylinder 5. Together with the base 1 and columns 2, it forms the overall frame of the device, ensuring the stability and rigidity of the device structure. A crossbeam 6 is fixedly installed in the center of the movable platform 3. The crossbeam 6 is the mounting base for the internal transmission and pressure adjustment components. The chambers inside provide space for components such as the short shaft 17 and the lead screw 18, and also provide fixed support points for the spring plate 9. Rotating frames 7 are movably installed at both ends of the crossbeam 6. The rotating frames 7 can bend and rotate around the connection point with the crossbeam 6. They are key intermediate components for transmitting pressure, converting the upward force of the pressure rod 12 into pressure on the spring plate 9. First chambers 8 are opened on both sides of the interior of the crossbeam 6. The first chambers 8 provide independent installation and movement space for components such as the spring plate 9, the short shaft 17, the lead screw 18, and the support platform 19, avoiding mutual interference between components and ensuring smooth transmission and pressure adjustment. Spring plates 9 are fixedly installed on both sides of the interior of the first chambers 8, and the ends of the spring plates 9 are... The spring plate 9 is the core component for generating pressure. It generates elastic force through its own bending deformation and then converts the elastic force into detection pressure acting on the glass cover. Its design of extending into the interior of the rotating frame 7 allows the bending action of the rotating frame 7 to directly act on the spring plate 9, achieving efficient transmission of elastic force. Each inner bottom side of the rotating frame 7 is fixedly equipped with a pressure roller 10, and the top of the pressure roller 10 abuts against the lower surface of the corresponding spring plate 9. The pressure roller 10 serves to connect the rotating frame 7 and the spring plate 9. When the rotating frame 7 bends, the pressure roller 10 can apply pressure to the spring plate 9 by rolling. At the same time, during the bending process of the spring plate 9, the pressure roller 10 can slide relative to its lower surface to compensate for the elastic force fluctuation caused by the change in the degree of bending of the spring plate 9, ensuring that the elastic force remains consistent throughout the process. Each rotating frame 7 has a connecting plate 11 movably mounted at its bottom end. The connecting plate 11 serves as a connecting link between the rotating frame 7 and the pressure rod 12, converting the linear motion of the pressure rod 12 into the bending motion of the rotating frame 7, thus realizing the conversion and transmission of force direction. Each end of the connecting plate 11 has a pressure rod 12 movably mounted on it. The pressure rod 12 is a key component for transmitting pressure. When the four-sided pyramidal pressure head 14 contacts the glass cover and is lifted, the pressure rod 12 will rise synchronously, thereby driving the rotating frame 7 to move through the connecting plate 11, completing the initial step of pressure transmission. The ends of the pressure rods 12 extend to the movable platform. The external parts of the pressure rod 12 and the four-sided pyramidal pressure head 14 are fixedly installed at both ends of the pressure head connecting rod 13. The pressure head connecting rod 13 connects the pressure rod 12 and the four-sided pyramidal pressure head 14, and evenly transmits the force transmitted by the pressure rod 12 to the four-sided pyramidal pressure head 14. At the same time, it provides an installation position for the pressure sensor 15 and the displacement sensor 16. The four-sided pyramidal pressure head 14 is fixedly installed at the bottom end of the pressure head connecting rod 13. The four-sided pyramidal pressure head 14 is a component that directly contacts the surface of the glass cover and applies detection pressure. Through its tip contacting the glass cover, an indentation is formed under pressure, which provides a physical basis for subsequent hardness calculation. Short shafts 17 are movably installed in the center of the first chamber 8. These short shafts 17 transmit rotational power, transferring the rotational motion of the driven bevel gear 23 to the lead screw 18, ensuring efficient power transmission to the pressure regulating component. Lead screws 18 are fixedly installed on the outer ends of the short shafts 17. The lead screw 18 converts rotational motion into linear motion of the support platform 19, serving as the core transmission component for adjusting the support point position of the spring plate 9. Support platforms 19 are threaded onto the outer diameter of the lead screw 18, with both ends of the support platform 19 abutting against the upper surface of the corresponding side spring plate 9. The support platform 19 provides an adjustable support point for the spring plate 9. The support position is changed by moving along the lead screw 18, thereby altering the pressure regulating component. The bending degree and elasticity of the variable spring plate 9 enable precise adjustment of the detection pressure. Positioning platforms 25 are movably mounted on both sides of the upper surface of the base 1 via guide rails 24. The guide rails 24 provide stable guidance for the movement of the positioning platforms 25, ensuring that the two positioning platforms 25 can move synchronously and smoothly inward or outward. The positioning platform 25 is a component that supports the glass cover plate. The positioning groove 26 on its inner side is used to place the glass cover plate. The positioning platform 25 can adapt to glass cover plates of different sizes by moving. The positioning groove 26 is provided on the inner side of the positioning platform 25. The positioning groove 26 provides positioning and fixing space for the glass cover plate. The pneumatic suction nozzle 27 and the air bag 28 inside work together to achieve stable fixing of the glass cover plate. In this embodiment, a hydraulic cylinder 5 is fixedly installed at the top center of the crossbeam 4. The hydraulic cylinder 5 is the power source for driving the movable platform 3 to move up and down. Through the extension and retraction of the internal piston rod, the movable platform 3 is driven to slide along the column 2, providing the initial descent power for the pyramidal indenter 14. The driving end of the hydraulic cylinder 5 extends to the bottom of the crossbeam 4 and is fixedly installed at the top center of the movable platform 3. This installation method ensures that the driving force of the hydraulic cylinder 5 can act vertically on the center position of the movable platform 3, avoiding tilting of the movable platform 3 during movement and ensuring that the pyramidal indenter 14 can contact the surface of the glass cover plate vertically. Furthermore, a pressure sensor 15 is fixedly installed between the indenter connecting rod 13 and the pyramidal indenter 14. The pressure sensor 15 is used to detect the pressure data of the pyramidal indenter 14 acting on the surface of the glass cover in real time, and convert the pressure signal into an electrical signal to feed back to the control system. This allows the operator to monitor the pressure in real time. When the pressure reaches the set target value, the control system can stop pressurizing in time to ensure the accuracy of pressure application. A displacement sensor 16 is fixedly installed at the top of the indenter connecting rod 13. The displacement sensor 16 is used to record the indentation depth of the pyramidal indenter 14 during the pressure holding stage in real time. By detecting the position change of the indenter connecting rod 13, the displacement data of the indenter is indirectly obtained, providing key parameters for analyzing the deformation characteristics of the glass cover and subsequent hardness calculation. Furthermore, a second chamber 20 is provided in the middle of the cross frame 6. The second chamber 20 provides installation space for the transmission components of the adjusting motor 21, preventing the driving bevel gear 22 and driven bevel gear 23 from being exposed and interfered with, while ensuring smooth gear transmission. The adjusting motor 21 is fixedly installed at the front end of the movable table 3. The adjusting motor 21 is the power source for adjusting the elasticity of the spring plate 9, providing stable rotational power for the pressure adjustment process. The drive end of the adjusting motor 21 extends into the interior of the second chamber 20 and is fixedly installed with the driving bevel gear 22. The driving bevel gear 22, as the active component for power transmission, drives the driven bevel gears on both sides through rotation. The driven bevel gear 23 rotates synchronously to achieve power distribution. The inner ends of the short shaft 17 extend into the interior of the second chamber 20 and are fixedly installed with driven bevel gear 23. The driven bevel gear 23 meshes with the driving bevel gear 22, transmitting the rotational power of the driving bevel gear 22 to the short shaft 17, which in turn drives the lead screw 18 to rotate. The two ends of the driving bevel gear 22 are respectively meshed with the inner ends of the two driven bevel gears 23. This symmetrical meshing structure ensures that the driven bevel gears 23 on both sides can rotate synchronously, thereby driving the short shaft 17, lead screw 18 and support platform 19 on both sides to move synchronously, ensuring that the elastic force adjustment on both sides of the spring plate 9 is uniform. Furthermore, several pneumatic suction nozzles 27 are fixedly installed on the bottom wall of the positioning groove 26. The pneumatic suction nozzles 27 are fixed from the bottom of the glass cover plate through vacuum adsorption, ensuring that the bottom of the glass cover plate is tightly attached to the bottom wall of the positioning groove 26, avoiding displacement during the detection process. At the same time, the vacuum adsorption method can provide uniform adsorption force, preventing local pressure concentration from damaging the glass cover plate. Airbags 28 are fixedly installed on the top wall of the positioning groove 26. The airbags 28 are inflated and pressed and fixed from above the glass cover plate. Their flexibility can form a buffer, and together with the adsorption force of the pneumatic suction nozzles 27, they can achieve double fixation. At the same time, the pressure of the airbags 28 can be adjusted to adapt to glass cover plates of different thicknesses and materials. An industrial camera 29 is fixedly installed at the top center of the base 1. The industrial camera 29 is used to capture the image of the indentation from the bottom of the glass cover plate after the indentation is formed, clearly recording the shape and size of the indentation, providing intuitive image basis for subsequent calculation of the hardness of the glass cover plate through indentation parameters, and ensuring the accuracy of the hardness calculation. Furthermore, a bidirectional threaded rod 30 is movably installed inside the base 1. The bidirectional threaded rod 30 consists of two threaded rods with opposite helical directions and is the core transmission component driving the positioning platform 25. By rotating, it drives the movable blocks 31 on both sides to move synchronously inward or outward. Movable blocks 31 are threadedly connected to the outer diameter of both sides of the bidirectional threaded rod 30. The movable blocks 31 convert the rotational motion of the bidirectional threaded rod 30 into linear motion, and drive the fixed rod and the positioning platform 25 to move synchronously through their own movement. Straight slots 32 are opened on both sides of the top of the base 1 near the position directly below the positioning platform 25. The straight slots 32 provide a moving channel for the fixed rod and at the same time limit the movement direction of the movable blocks 31 and the positioning platform 25, ensuring that they can only move in the horizontal direction and avoid deviation. Fixed rods are fixedly installed on the top of each movable block 31. The fixed rod connects the movable block 31 and the positioning platform 25, transmitting the linear movement of the movable block 31 to the positioning platform 25 to achieve position adjustment of the positioning platform 25. The ends of the fixed rods all pass through the interior of the corresponding straight slot 32 and are fixedly installed at the bottom of the corresponding positioning platform 25. This installation method ensures that the fixed rod can stably transmit power, and the limiting effect of the straight slot 32 further ensures the smoothness of the movement of the positioning platform 25. A DC motor 33 is fixedly installed on one side of the base 1, and the driving end of the DC motor 33 extends into the interior of the base 1 and is fixedly installed at one end of the bidirectional threaded rod 30. The DC motor 33 provides power for the rotation of the bidirectional threaded rod 30. By driving the bidirectional threaded rod 30 to rotate, the position adjustment of the positioning platform 25 is achieved, thereby adapting to glass covers of different sizes and laying the foundation for the precise positioning and fixing of the glass covers.

[0017] Working principle: First, the DC motor 33 is started, driving the bidirectional threaded rod 30 to rotate. Since the bidirectional threaded rod 30 consists of two helical threaded rods, when it rotates, the limiting action of the straight groove 32 will drive the two movable blocks 31 to move synchronously inward or outward, thereby driving the two positioning stages 25 to move synchronously inward or outward. After the movable stage 3 moves to the appropriate position, the two ends of the glass cover to be tested are placed in the two positioning grooves 26 respectively. The pneumatic suction nozzle 27 and the air bag 28 are started. The pneumatic suction nozzle 27 will suck up the two ends of the glass cover. After the air bag 28 is inflated, its volume increases. Adjusting the pressure of the air bag 28, the two ends of the glass cover are pressed and fixed from above. The fixing method uses vacuum suction and air bag 28 pressing. It not only provides uniform and stable fixing pressure for the glass cover plate, but also has a certain buffering effect to prevent the glass cover plate from cracking during testing. After fixing is completed, the hydraulic cylinder 5 is activated, and the piston rod inside the hydraulic cylinder 5 descends, driving the movable table 3 to descend and causing the pyramidal pressure head 14 at the bottom of the pressure head connecting rod 13 to follow. When the pyramidal pressure head 14 contacts the surface of the glass cover plate, the hydraulic cylinder 5 continues to exert force. At this time, the pyramidal pressure head 14 and the pressure head connecting rod 13 are lifted, causing the pressure rod 12 to rise. When the pressure rod 12 rises, it will bend the rotating frame 7 through the connecting plate 11. When the rotating frame 7 bends, it will bend the spring plate 9 through the pressure roller 10. The elastic force generated when the spring plate 9 bends is used to output the reverse force on the connecting plate 11 and the pressure rod 12, so as to provide pressure for the pressure head connecting rod 13. The connecting rod 13 and the pyramidal pressure head 14 provide pressure, thereby converting the elastic force of the spring plate 9 into pressure acting on the surface of the glass cover. Then, the adjusting motor 21 is activated, driving the driving bevel gear 22 to rotate, which in turn drives the driven bevel gears 23 and the short shaft 17 on both sides to rotate, thereby driving the two lead screws 18 to rotate. As the lead screws 18 rotate, they cause the support platforms 19 on both sides to move outward synchronously. As the position of the support platforms 19 slowly changes, the support point of the spring plate 9 changes, and the elastic force generated by the spring plate 9 gradually increases, causing the pressure of the pyramidal pressure head 14 acting on the glass cover surface to also slowly increase. The pressure sensor 15 monitors the pressure data in real time until the pressure reaches the set target value, at which point pressurization stops, and the pyramidal pressure head 14 remains in place. After several minutes of pressure holding, the glass surface bends due to the pressure. The positions of the pressure head connecting rod 13 and the pyramidal pressure head 14 change. The insertion depth of the pyramidal pressure head 14 is recorded by the displacement sensor 16. Furthermore, when the spring plate 9 bends, the pressure roller 10 slides outward relative to its lower surface, compensating for the increasing elastic force as the bend increases. This ensures that the elastic force generated by the spring plate 9 remains consistent throughout the process. Therefore, when the positions of the pressure head connecting rod 13 and the pyramidal pressure head 14 change, the bend of the spring plate 9 decreases, and the pressure roller 10 slides inward, compensating for the decreasing elastic force as the bend decreases. Thus, even if the position of the pyramidal pressure head 14 changes during the pressure holding stage...The pressure is maintained uniformly throughout the process to ensure the stable formation of the indentation. Once the indentation is formed, the industrial camera 29 captures the indentation image on the bottom of the glass for subsequent hardness calculation. After each individual point is inspected, the position of the glass cover is moved, and the process is repeated three to five times until all points are inspected. The hydraulic cylinder 5 then controls the four-sided pyramidal indenter 14 to reset, simultaneously closing the pneumatic suction nozzle 27 and the airbag 28. The positioning stage 25 resets, and the glass cover can then be removed.

[0018] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic pressure application device for testing the surface hardness of a glass cover plate, comprising a base (1), characterized in that, The base (1) has columns (2) fixedly installed on both sides of the top end. The outer diameter of the columns (2) is movably installed at both ends of the movable platform (3). The top of the columns (2) is fixedly installed on both sides of the bottom end of the crossbeam (4). A crossbeam (6) is fixedly installed in the middle of the movable platform (3). A rotating frame (7) is movably installed at both ends of the crossbeam (6). A first chamber (8) is opened on both sides of the interior of the crossbeam (6). A spring plate (9) is fixedly installed on both sides of the interior of the first chamber (8), and the ends of the spring plates (9) extend into the interior of the rotating frame (7) on the corresponding side. A pressure roller (10) is fixedly installed on one side of the bottom of the rotating frame (7), and the top of the pressure roller (10) abuts against the lower surface of the spring plate (9) on the corresponding side. The bottom end of the rotating frame (7) is movably equipped with a connecting plate (11), and the end of the connecting plate (11) is movably equipped with a pressure rod (12). The end of the pressure rod (12) extends to the outside of the movable platform (3) and is fixedly installed at both ends of the pressure head connecting rod (13). The bottom end of the pressure head connecting rod (13) is fixedly equipped with a four-sided pyramid pressure head (14). A short shaft (17) is movably installed in the middle of the first chamber (8). A lead screw (18) is fixedly installed on the outer end of the short shaft (17). A support platform (19) is threaded on the outer diameter of the lead screw (18), and both ends of the support platform (19) abut against the upper surface of the spring plate (9) on the corresponding side. A positioning platform (25) is movably installed on both sides of the upper surface of the base (1) via a guide rail (24). A positioning groove (26) is opened on the inner side of the positioning platform (25).

2. The automatic pressure application device for testing the surface hardness of a glass cover plate according to claim 1, characterized in that, A hydraulic cylinder (5) is fixedly installed at the top center of the crossbeam (4), and the driving end of the hydraulic cylinder (5) extends to the bottom of the crossbeam (4) and is fixedly installed at the top center of the movable platform (3).

3. The automatic pressure application device for testing the surface hardness of a glass cover plate according to claim 1, characterized in that, A pressure sensor (15) is fixedly installed between the pressure head connecting rod (13) and the four-sided pyramid pressure head (14), and a displacement sensor (16) is fixedly installed at the top of the pressure head connecting rod (13).

4. The automatic pressure application device for testing the surface hardness of a glass cover plate according to claim 1, characterized in that, The cross frame (6) has a second chamber (20) in the middle. An adjustment motor (21) is fixedly installed at the front end of the movable platform (3). The drive end of the adjustment motor (21) extends into the interior of the second chamber (20) and is fixedly installed with a drive bevel gear (22). The inner ends of the short shaft (17) extend into the interior of the second chamber (20) and are fixedly installed with driven bevel gears (23). The two ends of the drive bevel gear (22) are respectively meshed with the inner ends of the two driven bevel gears (23).

5. An automatic pressure application device for testing the surface hardness of a glass cover plate according to claim 1, characterized in that, Several pneumatic nozzles (27) are fixedly installed on the bottom wall of the positioning groove (26), and airbags (28) are fixedly installed on the top wall of the positioning groove (26). An industrial camera (29) is fixedly installed at the top center of the base (1).

6. An automatic pressure application device for testing the surface hardness of a glass cover plate according to claim 1, characterized in that, The base (1) is movably installed with a bidirectional threaded rod (30). Movable blocks (31) are threaded onto the outer diameter of both sides of the bidirectional threaded rod (30). Straight slots (32) are opened at the positions directly below the positioning platform (25) on both sides of the top of the base (1). A fixing rod is fixedly installed at the top of each movable block (31). The end of each fixing rod passes through the interior of the straight slot (32) on the corresponding side and is fixedly installed at the bottom of the positioning platform (25) on the corresponding side. A DC motor (33) is fixedly installed on one side of the base (1), and the driving end of the DC motor (33) extends into the interior of the base (1) and is fixedly installed at one end of the bidirectional threaded rod (30).

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