Grinding device for four corners of substrate

Abstract

The utility model belongs to the technical field of ceramic processing, and discloses a grinding device for four corners of a substrate, a conveying assembly comprises a conveying belt, and the conveying belt is configured to convey the substrate; the positioning assembly is configured to position the substrate conveyed by the conveyor belt; the two grinding assemblies are arranged on the two sides of the conveying belt, each grinding assembly comprises a grinding driving part, and a grinding head is arranged at the output end of each grinding driving part; the transfer assembly comprises a transfer driving piece, and a fixing part is arranged at the output end of the transfer driving piece and used for fixing the base plate. The pre-cleaning assembly comprises a cleaning cover, the cleaning cover is provided with a penetrating groove allowing the base plate to penetrate through and a moving groove allowing the fixing part to penetrate through, a liquid spraying nozzle and / or an air blowing nozzle are / is arranged in the cleaning cover, and the transfer driving piece can drive the fixing part to drive the base plate to be away from the positioning assembly and pass through the cleaning cover. The substrate is cleaned through the liquid spraying nozzle and / or the air blowing nozzle in the transferring process, grinding dust residues on the substrate are removed, the grinding dust is prevented from entering a cleaning machine, and the blocking problem is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic processing, in particular to a grinding device for the four corners of a substrate. Background Art

[0002] The four sharp corners of the ceramic substrate after edge grinding are relatively sharp. When loading the substrate into the basket in the clean room, the substrate is easy to get stuck on the sides of the basket, making it difficult to load the basket. When loading, the sharp corners of the substrate are also particularly easy to scratch the side of the basket, which is easy to drop dust and residue, causing more dust and foreign matter in the workshop. Therefore, chamfering is very necessary;

[0003] In the prior art, a large amount of grinding dust generated during the grinding process of the four corners of the ceramic substrate is brought into the cleaning machine, making it difficult to clean the product and possibly clogging the cleaning machine, thereby affecting production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a grinding device for the four corners of a substrate, which can be pre-cleaned after grinding to preliminarily clean the dust after grinding, avoid bringing a large amount of grinding dust into a cleaning machine, avoid clogging problems, and ensure production efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The grinding device for the four corners of the substrate comprises:

[0007] a conveyor assembly, the conveyor assembly comprising a conveyor belt, the conveyor belt being configured to convey a substrate;

[0008] a positioning assembly configured to position the substrate conveyed by the conveyor belt;

[0009] A grinding assembly, wherein two groups of the grinding assemblies are arranged on both sides of the conveyor belt, and the grinding assembly comprises a grinding drive member, and a grinding head is arranged at the output end of the grinding drive member so as to grind the substrate positioned by the positioning assembly;

[0010] A transfer assembly, wherein the transfer assembly comprises a transfer driving member, and an output end of the transfer driving member is provided with a fixing portion, and the fixing portion is used to fix the substrate;

[0011] A pre-cleaning component, the pre-cleaning component includes a cleaning cover, the cleaning cover is provided with a through groove for the substrate to pass through and a movable groove for the fixing part to pass through, a liquid spray nozzle and / or an air blowing nozzle is provided in the cleaning cover, and the transfer drive member can drive the fixing part to drive the substrate away from the positioning component and pass through the cleaning cover.

[0012] Preferably, the positioning assembly includes a blocking block, a first positioning drive and a first positioning block, wherein the blocking block is arranged on the conveying path of the conveyor belt to be able to block the substrate conveyed by the conveyor belt; the first positioning block is arranged opposite to the blocking block and is arranged upstream of the blocking block, and the first positioning block is arranged at the output end of the first positioning drive, and the first positioning drive can drive the first positioning block to rise and fall and approach or move away from the blocking block.

[0013] Preferably, the positioning assembly also includes a relative second positioning block and a second positioning drive, two second positioning blocks are arranged on both sides of the conveyor belt, the second positioning block is arranged at the output end of the second positioning drive, and the second positioning drive drives the second positioning block to move closer to or away from the substrate.

[0014] Preferably, the positioning assembly further comprises a receiving block, wherein the receiving block is located between the first positioning block and the blocking block, and the upper end surface of the conveyor belt is 1-2 mm higher than the upper end surface of the receiving block.

[0015] Preferably, the grinding assembly includes a traveling drive member and a cooling nozzle, a grinding cover is provided at the output end of the traveling drive member, and a first through hole is provided on the side of the grinding cover facing the conveyor belt for the substrate to extend into; the grinding drive member is provided at the output end of the traveling drive member, and a second through hole is provided on the grinding cover, and the grinding drive member can drive the grinding head to extend into the grinding cover through the second through hole, and the cooling nozzle can be aligned with the grinding head, and the cooling nozzle is connected to a liquid supply device.

[0016] Preferably, the transfer drive member includes a first transfer drive member and a second transfer drive member, the first transfer drive member is arranged at the output end of the second transfer drive member, the driving direction of the second transfer drive member is the same as the conveying direction of the conveyor belt, the driving direction of the first transfer drive member is perpendicular to the driving direction of the second transfer drive member, a lifting drive member is arranged at the output end of the first transfer drive member, and the fixed part is arranged at the output end of the lifting drive member.

[0017] Preferably, the fixing portion comprises a plurality of suction cups arranged at intervals, and the plurality of suction cups are located on the same straight line.

[0018] Preferably, the cleaning cover is provided with the liquid spray nozzle and the air blowing nozzle, a plurality of the liquid spray nozzles are evenly distributed on both sides of the movable groove along the extension direction of the movable groove, and the air blowing nozzle is arranged on the outlet side of the through groove.

[0019] Preferably, the plurality of liquid spray nozzles are relatively spaced apart and arranged on the upper and lower surfaces of the cleaning cover; the air blowing nozzle comprises two opposite C-shaped air cavities, and the two C-shaped air cavities are arranged on both sides of the movable groove.

[0020] Preferably, a protective baffle is provided at the edge of the movable groove, and the protective baffle is deformable.

[0021] Beneficial effects of the utility model:

[0022] After the grinding component grinds the substrate positioned in the positioning component, it is transferred by the transfer component. During the transfer process, a pre-cleaning component is added to clean the substrate through a liquid spray nozzle and / or an air blowing nozzle to remove the residual grinding dust on the substrate. In this way, after the substrate enters a subsequent cleaning machine, grinding dust is prevented from entering the cleaning machine, thereby avoiding blockage problems and ensuring production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the grinding device for the four corners of the substrate of the utility model;

[0024] Figure 2 It is a schematic diagram of the transmission component and the positioning component in the utility model;

[0025] Figure 3 It is a top view of the transmission component and the positioning component in the utility model;

[0026] Figure 4 It is a side view of the transmission component and the positioning component in the utility model;

[0027] Figure 5 It is a schematic diagram of the grinding assembly in the utility model;

[0028] Figure 6 It is a schematic diagram of the transfer assembly in the utility model;

[0029] Figure 7 It is a schematic diagram of the pre-cleaning component in the utility model.

[0030] In the figure:

[0031] 1. Frame;

[0032] 2. Conveying assembly; 21. Conveying belt; 22. Tensioning roller;

[0033] 3. Positioning assembly; 31. Clamping workbench; 32. Stop block; 33. First positioning drive member; 34. First positioning block; 35. Second positioning block; 36. Second positioning drive member; 37. Undertaking block; 38. Incoming material detection sensor;

[0034] 4. Grinding assembly; 41. Grinding drive; 42. Grinding head; 43. Travel drive; 44. Grinding cover; 441. First through hole; 442. Second through hole; 443. Water outlet; 45. Protective cover; 46. Horizontal slide; 47. Display dial indicator; 48. Moving plate; 49. Cooling nozzle;

[0035] 5. Transfer assembly; 51. Fixing part; 52. Transfer driving member; 521. First transfer driving member; 522. Second transfer driving member; 53. Lifting driving member; 54. Rotating bracket; 55. Rotating motor; 56. Rotating slip ring; 57. Mounting plate;

[0036] 6. Pre-cleaning assembly; 61. Cleaning cover; 62. Through slot; 63. Moving slot; 64. Liquid spray nozzle; 65. Blowing nozzle; 66. Protective baffle;

[0037] 7. Collection tank. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] like Figures 1 to 7 As shown, the utility model provides a grinding device for the four corners of a substrate, which is used for chamfering the four corners of the substrate. It is not limited to be used for ceramic substrates, and can also be used for chamfering other plates such as glass. The grinding device for the four corners of the substrate includes a conveying component 2, a positioning component 3, a grinding component 4, a transfer component 5 and a pre-cleaning component 6; the conveying component 2 includes a conveyor belt 21, and the conveyor belt 21 is configured to convey the substrate; the positioning component 3 is configured to position the substrate conveyed by the conveyor belt 21; two groups of grinding components 4 are arranged on both sides of the conveyor belt 21, and the grinding component 4 includes a grinding drive 41, and a grinding head 42 is arranged at the output end of the grinding drive 41 to grind the substrate positioned by the positioning component 3; the transfer component 5 includes a transfer drive 52, and a fixing part 51 is arranged at the output end of the transfer drive 52, and the fixing part 51 is used to fix the substrate; the pre-cleaning component 6 includes a cleaning cover 61, and the cleaning cover 61 is provided with a through groove 62 for the substrate to pass through and a movable groove 63 for the fixing part 51 to pass through, and a liquid spray nozzle 64 and / or a blowing nozzle 65 are arranged in the cleaning cover 61, and the transfer drive 52 can drive the fixing part 51 to drive the substrate away from the positioning component 3 and pass through the cleaning cover 61.

[0043] After the grinding component 4 grinds the substrate positioned in the positioning component 3, it is transferred by the transfer component 5. During the transfer process, a pre-cleaning component 6 is added to clean the substrate through the liquid spray nozzle 64 and / or the air blowing nozzle 65 to remove the residual grinding dust on the substrate. This prevents the grinding dust from entering the subsequent cleaning machine, thereby avoiding blockage and ensuring production efficiency.

[0044] The utility model is described in detail below:

[0045] like Figure 1As shown, the grinding device at the four corners of the substrate includes a frame 1 for support, and the transmission component 2, the positioning component 3, the grinding component 4, the transfer component 5 and the pre-cleaning component 6 are all located on the frame 1; a collecting tank 7 is provided on the frame 1, and the collecting tank 7 is located below the grinding component 4, the positioning component 3 and the pre-cleaning component 6, so as to receive the coolant and the cleaning liquid used for grinding to avoid splashing of the liquid; it can be understood that the collecting tank 7 is connected to the filtering device, so as to filter the collected coolant and the cleaning liquid, so that they can be recycled. The filtering device is not the focus of the present invention and will not be described in detail.

[0046] like Figure 4 As shown, in some embodiments, the transmission component 2 includes a conveyor belt 21 arranged on the frame 1, and at least two conveyor belts 21 are arranged at intervals to ensure stability during transmission. At the same time, during the grinding process, splashing of cooling liquid and cleaning liquid is inevitable. In this embodiment, the conveyor belt 21 adopts a polyurethane round belt to avoid liquid corrosion, extend life and transmission stability. It can be understood that the transmission component 2 also includes a transmission drive and a tensioning roller 22 for tensioning the conveyor belt 21. The above adopts existing technologies and will not be repeated.

[0047] like Figures 2 to 4As shown, in some embodiments, the positioning assembly 3 includes a clamping workbench 31 arranged on the frame 1, and a blocking block 32, a first positioning driving member 33 and a first positioning block 34 are arranged on the workbench. The blocking block 32 is located on the conveying path of the conveyor belt 21, so that the substrate conveyed by the conveyor belt 21 can be blocked by the blocking block 32, so that the substrate stays at the position of the positioning assembly 3; and the first positioning block 34 is arranged opposite to the blocking block 32 and is located upstream of the blocking block 32. In this embodiment, the upstream and downstream are distinguished by the conveying direction of the conveyor belt 21, that is, the first positioning block 34 faces the side of the initial direction of the conveyor belt 21, and the first positioning block 34 is arranged on the first positioning block 34. At the output end of the positioning driver 33, the first positioning driver 33 can drive the first positioning block 34 to move up and down relative to the upper end surface of the conveyor belt 21, so that the first positioning block 34 is located below the conveyor belt 21 during the substrate conveying process, and when the substrate hits the blocking block 32, the first positioning block 34 protrudes from the conveyor belt 21; and the first positioning driver 33 can also drive the first positioning block 34 to move closer to the blocking block 32, so as to fix the substrate together with the blocking block 32, and when the grinding is completed, the first positioning driver 33 can also drive the first positioning block 34 to move away from the blocking block 32, so as to release the substrate. Exemplarily, the first positioning driver 33 can be, but is not limited to, a rotary clamping cylinder. Furthermore, in order to ensure the stability of the substrate during grinding, the positioning assembly 3 also includes a relative second positioning block 35 and a second positioning driver 36. The second positioning driver 36 is arranged on the clamping workbench 31. Two second positioning blocks 35 are arranged on both sides of the conveyor belt 21. The second positioning blocks 35 are arranged at the output end of the second positioning driver 36. The second positioning driver 36 drives the second positioning block 35 to approach or move away from the substrate, so that the substrate can be fixed from both sides of the first positioning block 34 to further stabilize the substrate. Exemplarily, the second positioning driver 36 adopts a cylinder. Furthermore, in order to determine the time to raise the first positioning block 34 and ensure that the first positioning block 34 is raised from under the conveyor belt 21 after the substrate passes, an incoming material detection sensor 38 is also arranged on the frame 1, which is electrically connected to the first positioning driver 33 to avoid interference.

[0048] like Figure 1 and Figure 5As shown, two groups of grinding components 4 are arranged on both sides of the conveyor belt 21, and the grinding components 4 include a travel drive 43, and a grinding cover 44 is arranged at the output end of the travel drive 43, and a first through hole 441 is arranged on the side of the grinding cover 44 facing the conveyor belt 21, so that the travel drive 43 can drive the grinding cover 44 to approach or move away from the substrate on the positioning component 3, so that the four corners of the substrate extend into the grinding cover 44 for grinding, thereby avoiding the splashing of grinding residues; further, a protective cover 45 is also arranged on the outside of the travel drive 43 to avoid rust. The travel drive 43 adopts a travel slide to avoid the rust problem in a long-term common sense environment. Further, a transverse slide 46 is arranged at the output end of the travel drive 43, and the grinding cover 44 is arranged at the output end of the transverse slide 46. The driving direction of the transverse slide 46 is perpendicular to the conveying direction of the travel drive 43 and is the same as the conveying direction of the conveyor belt 21, so that the position of the grinding cover 44 can be adjusted by the transverse slide 46, so that the substrate is accurately docked with the first through hole 441. In addition, the transverse slide 46 is connected with a display dial indicator 47 to make the movement more accurate. A movable plate 48 is provided at the output end of the transverse slide 46, and the grinding cover 44 is fixed on the movable plate 48; and a grinding drive 41 is provided on the movable plate 48, and the grinding drive 41 is located above the grinding cover 44. A grinding head 42 is provided at the output end of the grinding drive 41 to drive the grinding head 42 to rise and fall, and a second through hole 442 corresponding to the grinding head 42 is provided on the grinding cover 44, and the grinding head 42 extends into the grinding cover 44 through the second through hole 442. After the grinding head 42 is used for a long time, the grinding head 42 can be driven to rise and fall by the grinding drive 41 to change the grinding position and increase the service life of the grinding head 42. Exemplarily, the grinding head 42 adopts a grinding wheel, and the grinding cover 44 adopts a PVC material. The grinding assembly 4 is also provided with a cooling nozzle 49 to align with the grinding head 42. The cooling nozzle 49 is connected to a liquid supply device to provide a coolant during grinding. In this embodiment, the coolant adopts cooling water. It should be noted that the cooling nozzle 49 can be disposed in the grinding cover 44; or it can be disposed on the clamping workbench 31, so that when the grinding cover 44 approaches, the cooling nozzle 49 extends into the grinding cover 44 through the first through port 441. In order to facilitate the discharge of cooling water, the grinding cover 44 is provided with a water outlet 443. When the substrate is located in the grinding cover 44, the water outlet 443 is located above the collecting tank 7, so that the cooling water used during grinding can enter the collecting tank 7.

[0049] After grinding is completed, the ground substrate needs to be transferred from the positioning assembly 3 to the pre-cleaning assembly 6 for pre-cleaning. Figure 2 and Figure 5As shown, since the conveying of the conveyor belt 21 is restricted by the blocking block 32 and cannot continue to convey, based on this, the transfer assembly 5 includes a transfer drive 52, and the output end of the transfer drive 52 is provided with a fixing portion 51 capable of fixing the substrate, thereby the substrate is turned away by the transfer drive 52. It should be noted here that when the fixing portion 51 is fixing the substrate, the substrate will press down the conveyor belt 21. In order to ensure the service life of the conveyor belt 21, the positioning assembly 3 also includes a receiving block 37 arranged on the clamping workbench 31, and the receiving block 37 is located between the first positioning block 34 and the blocking block 32. The upper end surface of the conveyor belt 21 is higher than the upper end surface of the receiving block 37 by 1mm-2mm, so that when the substrate presses down the conveyor belt 21, the substrate is directly pressed against the receiving block 37, avoiding excessive downward pressure of the conveyor belt 21 and extending the service life. In addition, through the above-mentioned receiving block 37, the conveyor belt 21 can be kept in the conveying state during the transfer of the substrate, thereby improving the efficiency of grinding and avoiding the jamming of the conveyor belt 21 due to excessive downward pressure, thereby preventing the conveyor belt 21 from being unable to convey. Furthermore, in order to monitor the height of the conveyor belt 21 and avoid the upper end surface of the conveyor belt 21 being lower than the receiving block 37 under normal conveying conditions, causing the conveyed substrate to hit the receiving block 37, a height detection sensor (not shown in the figure) is provided on the frame 1 to detect the height change of the conveyor belt 21. When the height of the conveyor belt 21 is reduced due to long-term wear and other problems, an alarm will be issued in time to prevent abnormal accidents.

[0050] like Figure 6As shown, in some embodiments, the transfer drive 52 includes a first transfer drive 521 and a second transfer drive 522, the first transfer drive 521 is arranged at the output end of the second transfer drive 522, the driving direction of the second transfer drive 522 is the same as the transmission direction of the conveyor belt 21, the driving direction of the first transfer drive 521 is perpendicular to the driving direction of the second transfer drive 522, and in this embodiment, the first transfer drive 521 and the second transfer drive 522 use a slide. The output end of the first transfer drive 521 is provided with a lifting drive 53, and the output end of the lifting drive 53 is provided with a fixing portion 51, so that the substrate is fixed by the fixing portion 51. In the current embodiment, the lifting drive 53 uses a lifting cylinder. Specifically, the output end of the first transfer drive 521 is provided with a rotating bracket 54, and the rotating bracket 54 is provided with a rotating motor 55 and a rotating slip ring 56. The lifting drive 53 is arranged at the output end of the rotating motor 55, so that the fixed substrate is turned by the rotating motor 55, so that the orientation of the substrate entering the cleaning cover 61 can be adjusted. More specifically, a mounting plate 57 is provided at the output end of the lifting drive member 53, and the fixing portion 51 includes a plurality of suction cups spaced apart on the mounting plate 57, and the plurality of suction cups are located on the same straight line, so as to facilitate fixing the substrate. It is understandable that a vacuum generator is also provided on the mounting plate 57, and the suction cup is connected to the vacuum generator for vacuum adsorption.

[0051] Therefore, when the suction cup is fixed, the first transfer drive 521 drives the substrate to be transported to the pre-cleaning component 6, and the second transfer drive 522 can adjust the position of the substrate to align it with the through groove 62; and the cleaning cover 61 is generally rectangular, thereby reducing the lateral occupied area while also reducing the size of the blowing nozzle 65. Based on this, during the transportation process, the rotating motor 55 first drives the substrate to turn and pass through in the length direction. After the adjustment is completed, the suction cup passes through the moving groove 63, during which the substrate it carries passes through the through groove 62, and then the substrate is cleaned by the liquid spray nozzle 64 and / or the blowing nozzle 65 in the cleaning cover 61. Exemplarily, the cleaning cover 61 is made of PVC material to avoid rust and to be able to observe the internal cleaning conditions. As Figure 7As shown, in some embodiments, a liquid spray nozzle 64 and an air blowing nozzle 65 are provided in the cleaning cover 61, so that liquid cleaning and air drying are performed simultaneously. Specifically, a plurality of liquid spray nozzles 64 are evenly distributed on both sides of the moving groove 63 along the extension direction of the moving groove 63, so that the substrate is sprayed with liquid for cleaning; and in order to clean the upper and lower sides of the substrate, a plurality of liquid spray nozzles 64 are relatively spaced and arranged on the upper and lower surfaces of the cleaning cover 61, so that the substrate passes between the relative liquid spray nozzles 64, so that both sides can be cleaned simultaneously. The liquid spray nozzle 64 is connected to an external liquid supply device, and in this embodiment, water is used as the cleaning liquid. In order to prevent the cleaning liquid from splashing out of the moving groove 63 and corroding the transfer component 5, a protective baffle 66 is provided at the edge of the moving groove 63, and the protective baffle 66 can be deformed to prevent the fixed part 51 from passing through while avoiding splashing; illustratively, the protective baffle 66 can be made of, but not limited to, silicone.

[0052] The blowing nozzle 65 is arranged at the outlet side of the through slot 62, so that after cleaning, the substrate can be dried by the blowing nozzle 65. Specifically, the blowing nozzle 65 is composed of two opposite C-shaped air cavities, which are arranged on both sides of the movable slot 63, so that the fixed part 51 can pass through the gap formed between the two C-shaped air cavities to avoid interference; and the substrate passes through the middle part of the C-shaped air cavity, so that the upper and lower sides of the substrate are dried to achieve the purpose of pre-cleaning, remove dust on the substrate, and avoid it from entering the cleaning machine.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A grinding device for the four corners of a substrate, characterized in that: include: A conveying assembly (2), the conveying assembly (2) comprising a conveying belt (21), the conveying belt (21) being configured to convey a substrate; a positioning component (3), the positioning component (3) being configured to position the substrate conveyed by the conveyor belt (21); A grinding assembly (4), two groups of the grinding assemblies (4) are arranged on both sides of the conveyor belt (21), the grinding assembly (4) comprises a grinding drive (41), and a grinding head (42) is arranged at the output end of the grinding drive (41) so as to grind the substrate positioned by the positioning assembly (3); A transfer assembly (5), the transfer assembly (5) comprising a transfer drive member (52), an output end of the transfer drive member (52) being provided with a fixing portion (51), the fixing portion (51) being used to fix the substrate; A pre-cleaning assembly (6), the pre-cleaning assembly (6) comprising a cleaning cover (61), the cleaning cover (61) being provided with a through slot (62) for the substrate to pass through and a movable slot (63) for the fixing portion (51) to pass through, a liquid spray nozzle (64) and / or an air blowing nozzle (65) being provided in the cleaning cover (61), and the transfer drive member (52) being capable of driving the fixing portion (51) to drive the substrate away from the positioning assembly (3) and pass through the cleaning cover (61).

2. The substrate four corner grinding device according to claim 1, characterized in that: The positioning assembly (3) comprises a blocking block (32), a first positioning drive member (33) and a first positioning block (34); the blocking block (32) is arranged on the conveying path of the conveyor belt (21) so as to be able to block the substrate conveyed by the conveyor belt (21); the first positioning block (34) is arranged opposite to the blocking block (32) and is arranged upstream of the blocking block (32); the first positioning block (34) is arranged at the output end of the first positioning drive member (33); the first positioning drive member (33) can drive the first positioning block (34) to rise and fall and to move closer to or away from the blocking block (32).

3. The substrate four corner grinding device according to claim 2, characterized in that: The positioning assembly (3) further comprises a second positioning block (35) and a second positioning drive member (36) opposite to each other, wherein the two second positioning blocks (35) are arranged on both sides of the conveyor belt (21), the second positioning block (35) is arranged at an output end of the second positioning drive member (36), and the second positioning drive member (36) drives the second positioning block (35) to approach or move away from the substrate.

4. The substrate four corner grinding device according to claim 2, characterized in that: The positioning assembly (3) further comprises a receiving block (37), wherein the receiving block (37) is located between the first positioning block (34) and the blocking block (32), and the upper end surface of the conveyor belt (21) is 1 mm-2 mm higher than the upper end surface of the receiving block (37).

5. The substrate four corner grinding device according to claim 1, characterized in that: The grinding assembly (4) comprises a travel drive member (43) and a cooling nozzle (49); a grinding cover (44) is provided at the output end of the travel drive member (43); a first through hole (441) is provided on the side of the grinding cover (44) facing the conveyor belt (21) for the substrate to extend into; the grinding drive member (41) is provided at the output end of the travel drive member (43); a second through hole (442) is provided on the grinding cover (44); the grinding drive member (41) can drive the grinding head (42) to extend into the grinding cover (44) through the second through hole (442); the cooling nozzle (49) can be aligned with the grinding head (42); and the cooling nozzle (49) is connected to a liquid supply device.

6. The apparatus for polishing four corners of a substrate according to claim 1, characterized in that: The transfer drive member (52) comprises a first transfer drive member (521) and a second transfer drive member (522), wherein the first transfer drive member (521) is arranged at the output end of the second transfer drive member (522), the driving direction of the second transfer drive member (522) is the same as the conveying direction of the conveyor belt (21), the driving direction of the first transfer drive member (521) is perpendicular to the driving direction of the second transfer drive member (522), a lifting drive member (53) is arranged at the output end of the first transfer drive member (521), and the fixing portion (51) is arranged at the output end of the lifting drive member (53).

7. The apparatus for polishing four corners of a substrate according to claim 6, characterized in that: The fixing portion (51) comprises a plurality of suction cups arranged at intervals, and the plurality of suction cups are located on the same straight line.

8. The grinding device for the four corners of a substrate according to any one of claims 1 to 7, characterized in that: The cleaning cover (61) is provided with the liquid spray nozzle (64) and the air blowing nozzle (65). The plurality of liquid spray nozzles (64) are evenly distributed on both sides of the movable groove (63) along the extension direction of the movable groove (63). The air blowing nozzle (65) is provided on the outlet side of the through groove (62).

9. The apparatus for polishing four corners of a substrate according to claim 8, characterized in that: The plurality of liquid spray nozzles (64) are arranged at intervals on the upper and lower surfaces of the cleaning cover (61); the air blowing nozzle (65) comprises two opposite C-shaped air cavities, and the two C-shaped air cavities are arranged on both sides of the movable groove (63).

10. The apparatus for polishing four corners of a substrate according to claim 9, characterized in that: A protective baffle (66) is provided at the edge of the movable groove (63), and the protective baffle (66) is deformable.

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