Grinding device for liquid crystal panel production and processing and grinding method thereof

Abstract

The invention relates to the technical field of grinding, and discloses a grinding device for liquid crystal panel production and processing and a grinding method thereof.The grinding device comprises a machine body and a rack installed on the machine body, an isolation hood is installed at the top of the machine body, a rotatable vacuum adsorption platform is arranged in the isolation hood, and a three-axis driving module is installed on the machine body; and a platform for storing a glass substrate is mounted at the front end of the top of the machine body. According to the gradient cooling assembly, through a unique heat conduction pipe frame structure and a cooling circulation mode, a temperature gradient which is gradually reduced from the center to the edge is formed on the vacuum adsorption platform, when the gradient cooling assembly makes contact with the bottom of the glass substrate, a radial temperature field of the glass substrate can be accurately controlled, and thermal stress caused by heat generated by friction in the grinding process is effectively reduced. And the thermal stress is reduced, so that the problems of warping, deformation and the like of the glass substrate can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and particularly to a grinding device and a grinding method for the production and processing of liquid crystal panels. Background Art

[0002] With the rapid development of display technology, liquid crystal panels are increasingly widely used in the field of electronic devices, from smartphones, tablets to TVs, monitors, etc., and their market demand continues to grow. In the production process of liquid crystal panels, the grinding of glass substrates is a crucial link, and the grinding quality directly affects the optical performance, display effect and overall yield of liquid crystal panels.

[0003] Currently, there are many problems with traditional grinding devices and methods for liquid crystal panel glass substrates. During the grinding process, a large amount of heat is generated due to the friction between the grinding disk and the glass substrate. Although the grinding fluid can dissipate heat to a certain extent, due to the complexity of the grinding process itself, the thermal stress cannot be completely eliminated, and the existing grinding devices lack effective thermal management means and cannot accurately control the temperature distribution of the glass substrate, resulting in large thermal stress on the glass substrate. The existence of thermal stress easily causes problems such as warping and deformation of the glass substrate, not only reducing the flatness and dimensional accuracy of the glass substrate, but also having a negative impact on the subsequent liquid crystal panel assembly and display performance. In severe cases, it even leads to the scrapping of the glass substrate, increasing the production cost.

[0004] Therefore, it is urgent to develop a new type of grinding device and method to improve the grinding quality and production efficiency of glass substrates and meet the development needs of the liquid crystal panel industry. The present invention precisely emerges based on the above background, and effectively solves the problems existing in the prior art through the innovative design of each component of the grinding device and the optimization of the grinding method. Summary of the Invention

[0005] In view of the above deficiencies existing in the prior art, the present invention provides a grinding device and a grinding method for the production and processing of liquid crystal panels, which cool the glass substrate and form a radial temperature field to reduce thermal stress.

[0006] The present invention provides the following technical solutions: A grinding device for the production and processing of liquid crystal panels includes a machine body and a frame installed on the machine body. An isolation cover is installed on the top of the machine body. A rotatable vacuum adsorption platform is provided inside the isolation cover. A three-axis drive module is installed on the machine body, and a platform for storing glass substrates is installed at the front end of the top of the machine body;

[0007] A suction cup holder and a motor-driven grinding disk are respectively installed on two Z-axis sliders of the three-axis drive module;

[0008] A gradient cooling component is inlaid on the top of the vacuum adsorption platform. A grooving structure is provided on the top of the vacuum adsorption platform, and the gradient cooling component is installed in the grooving structure. The gradient cooling component is in contact with the bottom of the glass substrate, and the temperature decreases sequentially from the middle to the edge, controlling the radial temperature field of the glass substrate and reducing the grinding thermal stress.

[0009] A retractable charge elimination component is installed on the isolation cover. Ion wind is introduced into the glass substrate through the charge elimination component to neutralize the charges on the glass and clean the grinding debris on the rotating glass substrate on the vacuum adsorption platform.

[0010] Preferably, the three-axis drive module includes two brackets installed on the edge of the machine body, and an X-axis module and a guide rail are respectively installed on the two brackets. A support beam is installed on the slide table of the X-axis module and the guide rail. A Y-axis module is installed on the support beam, and the slide table of the Y-axis module is connected to two Z-axis modules through a frame sliding on the support beam. The slide tables of the two Z-axis modules are respectively in contact with the suction cup holder and the grinding disc. The suction cup holder is driven by the three-axis drive module to transfer the glass substrate on the platform to the vacuum adsorption platform, and the grinding disc grinds it, and then transfers the ground glass substrate to the platform for convenient export.

[0011] Preferably, the gradient cooling component includes several groups of heat conduction tube frames that increase sequentially from the inside to the outside on the vacuum adsorption platform. The inside of the heat conduction tube frame is closed by a partition and two connecting pipes are installed at the head and tail, and the connecting pipes between adjacent two heat conduction tube frames are connected through a connector, so that all the heat conduction tube frames form a channel.

[0012] Preferably, the front end of each connector is connected to an air conduction pipe through a pipeline, and the connecting pipe at the bottom of the outermost heat conduction tube frame is connected to a cold air conduction pipe. When cold air is introduced into the outermost heat conduction tube frame, it is introduced into the next heat conduction tube frame through the connector, and the air introduced by the air conduction pipe is also introduced into the connector to cool the cold air, so that the temperature of the heat conduction tube frame decreases sequentially from the outside to the inside.

[0013] Preferably, the connecting pipe at the bottom of the innermost heat conduction tube frame extends to the side of the vacuum adsorption platform through a pipeline and an inclined air nozzle is installed. The rotating vacuum adsorption platform drives the air nozzle to rotate to clean the inside of the isolation cover.

[0014] Preferably, the grooving structure includes several groups of rectangular grooves opened on the vacuum adsorption platform. Heat insulation sleeves are inlaid inside the rectangular grooves. The heat insulation sleeves are designed in a U shape. The gradient cooling component is installed inside the heat insulation sleeves. Heat conduction silica gel strips are filled at the top of the heat insulation sleeves, and the heat conduction silica gel strips are flush with the surface of the vacuum adsorption platform.

[0015] Preferably, the isolation cover includes a circular outer shell installed on the machine body. A frustum is installed at the bottom end inside the circular outer shell. The vacuum adsorption platform is arranged on the frustum through a turntable bearing and is driven by a motor. An annular flow groove is formed between the frustum and the circular outer shell, and a liquid discharge port is provided at the bottom end of the circular outer shell. The grinding liquid and debris in the flow groove are discharged through the liquid discharge port.

[0016] Preferably, the charge elimination component includes a guiding outer shell hinged to the edge of the isolation cover. The guiding outer shell is driven to rotate by a motor. An ion generator and a communication pipeline connecting the ion generator are provided inside the guiding outer shell. A row of inclined nozzles are provided on the guiding outer shell, and the nozzles are communicated with the pipeline. Air carries a large amount of positive and negative ions from the ion generator and sprays them onto the glass through the nozzles. The charges on the glass are neutralized by the positive and negative ions. At the same time, a large amount of compressed gas is sprayed through the nozzles to blow the glass and the vacuum adsorption platform to clean the grinding liquid and debris on the surface.

[0017] A grinding method for liquid crystal panel production and processing is as follows:

[0018] S1. Place the glass substrate to be ground on the storage platform at the front end of the machine body. The three-axis drive module drives the suction cup frame thereon to transfer the glass substrate to the vacuum adsorption platform and locks the position of the glass substrate through negative pressure adsorption.

[0019] S2. The three-axis drive module drives the grinding disc thereon to move and grind the surface of the glass substrate. At the same time, the vacuum adsorption platform rotates under the drive of the motor, so that the glass substrate is ground in a rotating environment.

[0020] S3. During the grinding process, the gradient cooling component cools the glass substrate, making the temperature in the middle higher than that at the edge, forming a radial temperature gradient, reducing the thermal stress caused by frictional heat generation in the subsequent grinding process. The charge elimination component extends and moves above the vacuum adsorption platform, and adds positive and negative ions to the glass surface through wind force to neutralize the charges generated by glass friction.

[0021] S4. After grinding to the set time, while the grinding disc continues to work, the charge elimination component sprays compressed air to clean the grinding liquid and debris on the surfaces of the glass and the vacuum adsorption platform through wind force.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The gradient cooling component forms a temperature gradient that gradually decreases from the center to the edge on the vacuum adsorption platform through a unique heat conduction tube frame structure and cooling cycle method. When contacting the bottom of the glass substrate, it can accurately control the radial temperature field of the glass substrate and effectively reduce the thermal stress caused by frictional heat generation during the grinding process. The reduction of thermal stress can avoid problems such as warping and deformation of the glass substrate. The gradient temperature field cooperates with the rotation of the vacuum adsorption platform, making the temperature in the middle of the glass substrate higher than that at the edge, adapting to the characteristic that the frictional heat in the central area is more concentrated during the grinding process and balancing the overall heat distribution.

[0024] (2) The design of the grooving structure enables the heat conduction tube frame to be embedded in the heat insulation sleeve and filled with heat conduction silica gel strips, avoiding structural loosening caused by thermal expansion and contraction. At the same time, through heat conduction optimization, it ensures the stability of the temperature gradient and improves the cooling efficiency.

[0025] (3) The charge elimination component generates positive and negative ions through an ion generator, introduces ion wind to the glass substrate, and timely neutralizes the charges generated by the glass during the grinding process, preventing static electricity from adsorbing impurities such as dust and debris, and avoiding defects such as surface scratches and pits caused by impurities, further ensuring the smoothness and flatness of the surface of the ground glass substrate; the nozzle of the charge elimination component sprays compressed air, which can clean the grinding fluid and debris on the surface of the substrate in real time during the grinding process, avoiding secondary pollution.

[0026] (4) The annular flow groove in the isolation cover guides the grinding fluid and debris to the drain port, and cooperates with the filter to realize the recycling of the grinding fluid and reduce costs; at the same time, the air nozzle of the gradient cooling component rotates with the platform, and blows the flow groove and the surface of the substrate through air flow to prevent debris accumulation from affecting the grinding effect. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structural distribution on the body of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the three-axis drive module of the present invention;

[0030] Figure 4 It is a schematic diagram of the installation structure of the vacuum adsorption platform of the present invention;

[0031] Figure 5 For the present invention Figure 4 Split structure schematic diagram;

[0032] Figure 6 It is a schematic diagram of the structure of the gradient cooling component of the present invention;

[0033] Figure 7 It is a schematic diagram of the grooving structure of the present invention.

[0034] In the figure: 1, body; 2, frame; 3, vacuum adsorption platform; 4, isolation cover; 5, three-axis drive module; 6, platform; 7, gradient cooling component; 8, charge elimination component; 9, grooving structure; 10, suction cup holder; 11, grinding disc; 51, bracket; 52, X-axis module; 53, guide rail; 54, support beam; 55, Y-axis module; 56, Z-axis module; 71, heat conduction tube frame; 72, connecting tube; 73, connector; 74, air conduction tube; 75, cold air conduction tube; 76, jet nozzle; 91, rectangular groove; 92, heat insulation sleeve; 93, heat conduction silica gel strip; 41, circular outer shell; 42, frustum; 43, flow groove; 44, drain port; 81, guide outer shell; 82, nozzle. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and known components are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0036] Please refer to Figure 1 and Figure 2 , a grinding device for liquid crystal panel production and processing provided by the present invention. The main body of this grinding device is composed of a body 1 and a frame 2. The frame 2 is firmly installed on the body 1 to provide a support basis for other components. The isolation cover 4 installed on the top of the body 1 forms a relatively enclosed working space. Inside the isolation cover 4, the rotatable vacuum adsorption platform 3 is a key component for carrying the glass substrate. The three-axis drive module 5 provided on the body 1 can achieve precise movement of the suction cup holder 10 and the grinding disc 11 in three-dimensional space.

[0037] Refer to Figure 3 , for the three-axis drive module 5 installed on the body 1, its two brackets 51 are fixed to the edge of the body 1 by welding to ensure the installation strength. The X-axis module 52 and the guide rail 53 are installed in parallel on the bracket 51. When installing, a laser alignment instrument is required for straightness calibration to ensure that the parallelism error between the two is controlled within 0.02 mm. The support beam 54 jointly installed on the slides of the X-axis module 52 and the guide rail 53 is made of high-strength aluminum alloy and is firmly connected to the slide by bolts. The Y-axis module 55 installed on the support beam 54 is also precisely calibrated. Its slide is connected to the two Z-axis modules 56 through a sliding frame. Linear guide rails and sliders are provided between the sliding frame and the support beam 54 to ensure the smoothness and accuracy of the movement of the slide of the Y-axis module 55.

[0038] During the grinding process, the three-axis drive module 5 drives the grinding disc 11 to precisely grind on the surface of the glass substrate according to a pre-set grinding trajectory. The grinding disc 11 is directly driven by a motor to rotate, and its rotation speed can be adjusted according to the requirements of the grinding process. Through the coordinated control of the X-axis module 52, Y-axis module 55, and Z-axis module 56, various grinding operations such as planar grinding and edge grinding of the grinding disc 11 on the surface of the glass substrate can be achieved. After the grinding is completed, the three-axis drive module 5 acts again to transfer the ground glass substrate back to the platform 6, facilitating subsequent export and processing. Moreover, a grinding fluid guide pipe is provided on the three-axis drive module 5 to introduce grinding fluid during the grinding process.

[0039] The platform 6 at the front end of the top of the machine body 1 is made of anti-static material and its surface is anodized, which is used to store the glass substrates to be ground. The platform 6 is fixed to the machine body 1 by bolts, and its height is adapted to that of the vacuum adsorption platform 3, facilitating the transfer operation of the three-axis drive module 5 for the glass substrate.

[0040] Refer to Figure 4 and Figure 6 For the gradient cooling component 7, several heat conduction tube frames 71 are made of copper with good heat conduction performance and are formed by precision casting. Each heat conduction tube frame 71 has a closed space formed by welding partitions inside, and connecting tubes 72 are welded at both the head and the tail. The connecting tubes 72 between adjacent two heat conduction tube frames 71 are thread-connected and sealed by a connector 73 to ensure that the cooling gas will not leak in the channel. The front end of each connector 73 is connected to an air conduction tube 74 through a pipe, and the air conduction tube 74 is externally connected to an air compressor, which can introduce air into the connector 73. The connecting tube 72 at the bottom of the outermost heat conduction tube frame 71 is connected to a cold air conduction tube 75, and the cold air conduction tube 75 is connected to a low-temperature refrigeration unit, which can provide stable low-temperature cooling gas.

[0041] When the cold air is introduced into the outermost heat conduction tube frame 71 from the cold air conduction tube 75, it will be sequentially introduced into the next heat conduction tube frame 71 through the connector 73. During the flowing process, the air introduced by the air conduction tube 74 is mixed with the cold air in the connector 73 to cool the cold air, so that the temperature of the heat conduction tube frames 71 decreases sequentially from the outside to the inside, thereby forming a temperature gradient that gradually decreases from the center to the edge on the surface of the vacuum adsorption platform 3. The connecting tube 72 at the bottom of the innermost heat conduction tube frame 71 extends to the side of the vacuum adsorption platform 3 through a pipe and is equipped with an inclined air nozzle 76. When the vacuum adsorption platform 3 rotates, the air nozzle 76 will rotate accordingly to eject the air passing through the heat conduction tube frame 71 to clean the inside of the isolation cover 4, preventing the accumulation of grinding debris from affecting the grinding effect.

[0042] Refer to Figure 7, the rectangular groove 91 of the grooving structure 9 is precisely machined on the vacuum adsorption platform 3 by a CNC machining center to ensure the dimensional accuracy and positional accuracy of the groove. The heat insulation sleeve 92 embedded inside the rectangular groove 91 is made of ceramic fiber material with high temperature resistance and good heat insulation performance, and is formed into a U-shaped structure by die pressing. Its size is adapted to the rectangular groove 91 and can be tightly embedded in the rectangular groove 91. The gradient cooling component 7 is installed inside the heat insulation sleeve 92. During installation, it is necessary to ensure that there is a tight fit between the heat conduction tube frame 71 and the heat insulation sleeve 92 to ensure good heat conduction effect, and to avoid directly installing the heat conduction tube frame 71 in the rectangular groove 91, where the heat conduction tube frame 71 may become loose due to thermal expansion and contraction. The top of the heat insulation sleeve 92 is filled with heat conductive silicone strips 93. Before filling, the surface of the heat conductive silicone strips 93 needs to be cleaned. During filling, a special injection equipment is used to ensure uniform filling, and the heat conductive silicone strips 93 are flush with the surface of the vacuum adsorption platform 3. This not only ensures good contact between the glass substrate and the gradient cooling component 7, but also reduces the transfer of heat to other parts of the vacuum adsorption platform 3 through the heat insulation sleeve 92, ensuring the stability of the temperature gradient.

[0043] Refer to Figure 5 , the circular outer shell 41 of the isolation cover 4 is connected to the machine body 1 through a sealing flange to ensure the tightness of the working space. The frustum 42 inside the circular outer shell 41 is fixed to the machine body 1 by bolts. The surface of the frustum 42 is ground to ensure its flatness and surface roughness to ensure the stable installation of the vacuum adsorption platform 3. During the grinding process, grinding fluid and debris will enter the annular flow groove 43 formed between the frustum 42 and the circular outer shell 41 along with the grinding operation. The bottom of the flow groove 43 is designed with a certain slope to facilitate the flow of the grinding fluid and debris towards the drain port 44. The drain port 44 is connected to a drain pipe, and a filter is installed on the drain pipe to filter the discharged grinding fluid, separate the debris, and the filtered grinding fluid can be recycled to reduce production costs. In addition, the air nozzles 76 on the gradient cooling component 7 move around the flow groove 43 to clean the debris and grinding fluid in the flow groove 43, guiding the debris and grinding fluid into the drain port 44.

[0044] The guiding outer shell 81 of the charge elimination component 8 is installed on the edge of the isolation cover 4 through a hinge seat. The hinge seat is made of stainless steel to ensure the connection strength and corrosion resistance. The guiding outer shell 81 is driven to rotate by a dedicated drive motor. The drive motor is connected to the guiding outer shell 81 through a reducer, which can achieve the smooth rotation and position switching of the guiding outer shell 81, and the guiding outer shell 81 points to the center of the vacuum adsorption platform 3. In this way, after the vacuum adsorption platform 3 rotates, the nozzle 82 can clean the entire vacuum adsorption platform 3. The ion generator installed inside the guiding outer shell 81 uses high-frequency pulse technology and can generate a large number of positive and negative ions. The connecting pipe connecting the ion generator is made of anti-static material to ensure that the ions can be smoothly transmitted to the nozzle 82.

[0045] During the grinding process, when charge neutralization and cleaning of the glass substrate are required, the control system issues an instruction to start the drive motor of the guiding housing 81, which drives the guiding housing 81 to rotate and move to above the vacuum adsorption platform 3. Air carries a large number of positive and negative ions from the ion generator and sprays the glass through the nozzle 82 to neutralize the charge on the glass through the positive and negative ions. At the same time, a large amount of compressed gas sprayed by the nozzle 82 can blow the glass and the vacuum adsorption platform 3 to clean the grinding liquid and debris on the surface. The inclination angle of the nozzle 82 is optimized to ensure that the sprayed air flow covers the entire surface of the glass substrate and the vacuum adsorption platform 3, improving the cleaning effect. When the grinding continues, it is cleaned by wind force.

[0046] I. Substrate Transfer and Fixation

[0047] The operator carefully places the glass substrate to be ground on the storage platform 6 at the front end of the machine body 1. When placing the glass substrate, attention should be paid to the direction and position to ensure that it is within the grasping range of the suction cup holder 10. Subsequently, the operator inputs the grinding process parameters on the operation interface of the control system, including information such as the size, grinding thickness, and grinding speed of the glass substrate. The control system calculates the movement path and grasping position of the suction cup holder 10 according to the input parameters and issues an instruction to the three-axis drive module 5. The three-axis drive module 5 drives the suction cup holder 10 thereon to move above the glass substrate according to the instruction. The Z-axis module 56 makes the suction cup holder 10 descend. When the suction cup is about 2 - 3 mm away from the surface of the glass substrate, the vacuum system is started, and the glass substrate is adsorbed through the suction cup. Then, the Z-axis module 56 drives the suction cup holder 10 to rise, and the X-axis module 52 and the Y-axis module 55 transfer the glass substrate above the vacuum adsorption platform 3. The Z-axis module 56 descends again to place the glass substrate stably on the vacuum adsorption platform 3. The vacuum adsorption platform 3 locks the position of the glass substrate through negative pressure adsorption to ensure that the glass substrate does not displace during the grinding process.

[0048] II. Grinding Operation

[0049] After the glass substrate is fixed on the vacuum adsorption platform 3, the three-axis drive module 5 operates again, driving the grinding disc 11 thereon to move to a suitable position on the surface of the glass substrate. The motor of the grinding disc 11 starts and begins to rotate, and its rotation speed is adjusted according to the preset grinding process parameters. At the same time, the vacuum adsorption platform 3 starts to rotate under the drive of the motor, enabling the glass substrate to be ground in a rotating environment. During the grinding process, the three-axis drive module 5 accurately controls the position and pressure of the grinding disc 11 according to the preset grinding trajectory through the coordinated control of the X-axis module 52, Y-axis module 55, and Z-axis module 56. For example, during planar grinding, the grinding disc 11 moves parallel to the surface of the glass substrate, and the descent depth of the grinding disc 11 is controlled by the Z-axis module 56 according to the grinding thickness requirement; during edge grinding, the three-axis drive module 5 adjusts the position and angle of the grinding disc 11 according to the edge contour of the glass substrate to ensure the accuracy of edge grinding.

[0050] III. Cooling and Charge Neutralization

[0051] During the grinding process, the gradient cooling component 7 continuously operates, and the low-temperature coolant is introduced into the outermost heat conduction tube frame 71 from the cold air conduction tube 75, flowing through each heat conduction tube frame 71 in sequence. During the flow process, heat exchange occurs with the glass substrate to cool the glass substrate. Since the temperature of the heat conduction tube frames 71 decreases sequentially from the outside to the inside, the temperature in the middle of the glass substrate is higher than that at the edge, forming a radial temperature gradient, effectively reducing the thermal stress caused by frictional heat generation during the subsequent grinding process.

[0052] At the same time, the charge elimination component 8 automatically extends and moves above the vacuum adsorption platform 3 after a period of time after the grinding starts. The ion generator is started, and air carries a large number of positive and negative ions through the ion generator and sprays them on the glass from the nozzle 82. The charges generated by glass friction are neutralized by the positive and negative ions to prevent static electricity from damaging the glass substrate. The airflow sprayed by the nozzle 82 can also initially clean the surface of the glass substrate, blowing some grinding debris off the surface of the glass substrate.

[0053] IV. Cleaning Operation

[0054] When the grinding reaches the set time, the control system issues an instruction, and the three-axis drive module 5 continues to drive the grinding disc 11 to operate. At this time, the charge elimination component 8 continues to work, and the nozzle 82 increases the spraying amount of compressed air to comprehensively clean the grinding fluid and debris on the surfaces of the glass and the vacuum adsorption platform 3 by wind force. During the cleaning process, the vacuum adsorption platform 3 continues to rotate to ensure that the entire surfaces of the glass substrate and the vacuum adsorption platform 3 can be fully cleaned. After the cleaning is completed, the charge elimination component 8 retracts, and the three-axis drive module 5 transfers the ground glass substrate back to the platform 6, and the operator can take out the glass substrate for subsequent detection and processing.

[0055] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present invention.

Claims

1. A grinding device for the production and processing of liquid crystal panels, characterized in that: It includes a machine body (1) and a frame (2) installed on the machine body (1). An isolation cover (4) is installed on the top of the machine body (1). A rotatable vacuum adsorption platform (3) is arranged inside the isolation cover (4). A three-axis drive module (5) is installed on the machine body (1). A platform (6) for storing glass substrates is installed at the front end of the top of the machine body (1). A suction cup holder (10) and a motor-driven grinding disc (11) are respectively installed on two Z-axis sliding tables of the three-axis drive module (5). A gradient cooling component (7) is embedded in the top of the vacuum adsorption platform (3). A grooving structure (9) is arranged on the top of the vacuum adsorption platform (3), and the gradient cooling component (7) is installed in the grooving structure (9). By contacting the bottom of the glass substrate through the gradient cooling component (7) and making the temperature decrease sequentially from the middle to the edge, the radial temperature field of the glass substrate is controlled to reduce the grinding thermal stress. A retractable charge elimination component (8) is installed on the isolation cover (4). Ion wind is introduced into the glass substrate through the charge elimination component (8) to neutralize the charge on the glass, and the grinding debris on the rotating glass substrate on the vacuum adsorption platform (3) is cleaned.

2. The grinding device for the production and processing of a liquid crystal panel according to claim 1, wherein: The three-axis drive module (5) includes two brackets (51) installed on the edge of the machine body (1). An X-axis module (52) and a guide rail (53) are respectively installed on the two brackets (51). A support beam (54) is installed on the sliding table of the X-axis module (52) and the guide rail (53). A Y-axis module (55) is installed on the support beam (54). The sliding table of the Y-axis module (55) is connected to two Z-axis modules (56) through a frame sliding on the support beam (54). The suction cup holder (10) and the grinding disc (11) are respectively connected to the sliding tables of the two Z-axis modules (56). The three-axis drive module (5) drives the suction cup holder (10) to transfer the glass substrate on the platform (6) to the vacuum adsorption platform (3), grinds it through the grinding disc (11), and transfers the ground glass substrate to the platform (6) for convenient export.

3. A grinding device for the production and processing of liquid crystal panels according to claim 1, characterized in that: The gradient cooling component (7) includes several groups of heat conduction tube frames (71) distributed on the vacuum adsorption platform (3) and increasing sequentially from inside to outside. The inside of the heat conduction tube frame (71) is enclosed by partitions and two connecting pipes (72) are installed at the head and tail. The connecting pipes (72) between adjacent two heat conduction tube frames (71) are communicated through a connector (73) so that all the heat conduction tube frames (71) form a channel.

4. The grinding device for the production and processing of a liquid crystal panel according to claim 3, wherein: The front end of each connector (73) is communicated with an air conduction tube (74) through a pipeline, and the connecting pipe (72) at the bottom of the outermost heat conduction tube frame (71) is communicated with a cold air conduction tube (75). When cold air is introduced into the outermost heat conduction tube frame (71), it is introduced into the next heat conduction tube frame (71) through the connector (73). The air introduced by the air conduction tube (74) is also introduced into the connector (73) to adjust the temperature of the cold air, so that the temperature of the heat conduction tube frame (71) decreases sequentially from outside to inside.

5. The grinding device for the production and processing of a liquid crystal panel according to claim 3, wherein: The connecting pipe (72) at the bottom of the innermost heat-conducting pipe frame (71) extends to the side of the vacuum adsorption platform (3) through a pipeline and is equipped with an inclined air nozzle (76). The rotating vacuum adsorption platform (3) drives the air nozzle (76) to rotate to clean the interior of the isolation cover (4).

6. The grinding device for the production and processing of a liquid crystal panel according to claim 1, wherein: The grooving structure (9) includes several groups of rectangular grooves (91) opened on the vacuum adsorption platform (3). The interior of the rectangular grooves (91) is inlaid with heat insulation sleeves (92). The heat insulation sleeves (92) are designed in a U shape. The gradient cooling assembly (7) is installed in the heat insulation sleeves (92). The top of the heat insulation sleeves (92) is filled with heat-conducting silica gel strips (93), and the heat-conducting silica gel strips (93) are flush with the surface of the vacuum adsorption platform (3).

7. A grinding device for the production and processing of liquid crystal panels according to claim 1, characterized in that: The isolation cover (4) includes a circular outer shell (41) installed on the machine body (1). A frustum (42) is installed at the bottom end inside the circular outer shell (41). The vacuum adsorption platform (3) is arranged on the frustum (42) through a turntable bearing and is driven by a motor. An annular flow groove (43) is formed between the frustum (42) and the circular outer shell (41). A liquid discharge port (44) is provided at the bottom end of the circular outer shell (41). The grinding liquid and debris in the flow groove (43) are discharged through the liquid discharge port (44).

8. A grinding device for the production and processing of liquid crystal panels according to claim 1, characterized in that: The charge elimination assembly (8) includes a guiding outer shell (81) hinged to the edge of the isolation cover (4). The guiding outer shell (81) is driven to rotate by a motor. An ion generator and a communication pipeline connecting the ion generator are provided inside the guiding outer shell (81). A row of inclined nozzles (82) are provided on the guiding outer shell (81), and the nozzles (82) are communicated with the pipeline. Air carries a large number of positive and negative ions from the ion generator and sprays them on the glass through the nozzles (82). The charges on the glass are neutralized by the positive and negative ions. At the same time, a large amount of compressed gas is sprayed through the nozzles (82) to blow the glass and the vacuum adsorption platform (3) to clean the grinding liquid and debris on the surface.

9. A grinding method for the production and processing of liquid crystal panels, characterized in that, Adopt a grinding device for liquid crystal panel production and processing according to any one of claims 1-8. The specific operation is as follows: S1. Place the glass substrate to be ground on the storage platform (6) at the front end of the machine body (1). The three-axis drive module (5) drives the suction cup holder (10) thereon to transfer the glass substrate to the vacuum adsorption platform (3), and locks the position of the glass substrate through negative pressure adsorption. S2. The three-axis drive module (5) drives the grinding disc (11) thereon to move to grind the surface of the glass substrate. At the same time, the vacuum adsorption platform (3) rotates under the drive of the motor, so that the glass substrate is ground in a rotating environment. S3. During the grinding process, the gradient cooling assembly (7) cools the glass substrate to make the temperature in the middle higher than that at the edge, forming a radial temperature gradient, reducing the thermal stress caused by heat generation due to friction in the subsequent grinding process. The charge elimination assembly (8) extends and moves above the vacuum adsorption platform (3), and adds positive and negative ions to the glass surface through wind force to neutralize the charges generated by glass friction. S4. After grinding for the set time, while the grinding disc (11) continues to work, the charge elimination component (8) sprays compressed air to clean the grinding fluid and debris on the surfaces of the glass and the vacuum adsorption platform (3) by means of wind force.

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