CN116300167A

CN116300167A - Workbench for adjusting flatness of liquid crystal glass based on bonding process

Info

Publication number: CN116300167A
Application number: CN202310579242.XA
Authority: CN
Inventors: 宋保玲; 李想; 冯志祥; 李春燕; 程永胜; 李铁; 张鹏飞; 赵东钰; 高小飞; 任世伟; 文志浩
Original assignee: CETC Fenghua Information Equipment Co Ltd
Current assignee: CETC Fenghua Information Equipment Co Ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-06-23
Anticipated expiration: 2043-05-23
Also published as: CN116300167B

Abstract

The invention relates to the technical field of bonding machines, in particular to a workbench for adjusting the flatness of liquid crystal glass based on a bonding process, which comprises a grid frame; the adsorption bedplate is provided with a plurality of adsorption bedplate which are fixed on the grid framework through first screws and are screwed with jackscrews, and the heads of the first screws and the heads of the jackscrews are countersunk; the adjustable support assembly is provided with a plurality of adjustable support assemblies and comprises a mounting block, an adjusting rod, a connecting nut and a locking nut; the platform cover plate is provided with a plurality of residual grids which are in one-to-one correspondence with the grid frame except the first row of grids at the front end, is supported above the connecting nuts and is tightly pressed by second screws in the connecting nuts through tail end screw connection, and the heads of the second screws are countersunk heads. The workbench is formed by jointly splicing the plurality of platform cover plates and the adsorption bedplate, so that the internal stress generated by large size can be avoided, the bedplate can be prevented from being deformed, and the bonding deviation of the liquid crystal glass caused by the deformation of the bedplate can be avoided.

Description

Workbench for adjusting flatness of liquid crystal glass based on bonding process

Technical Field

The invention relates to the technical field of bonding machines, in particular to a workbench for adjusting flatness of liquid crystal glass based on a bonding process.

Background

The COF bonding machine is a device for establishing stable connection between liquid crystal glass and COF (chip on film) through ACF (anisotropic conductive adhesive). When bonding, the liquid crystal glass is placed on a workbench, firstly, the ACF is positioned and applied visually, then the COF and the MARK point are aligned at a pre-pressing station, and finally, the COF is fixed on the liquid crystal glass through the ACF by a main pressing station. The whole process has higher precision requirements, so that the precision and flatness requirements of a workbench for carrying liquid crystal glass are also higher.

The existing working table for large-size (446 mm multiplied by 53mm to 1435mm multiplied by 800 mm) liquid crystal glass is mainly an integral table plate, and adsorption holes are uniformly distributed on the surface of the integral table plate for adsorbing and supporting the liquid crystal glass. The integral platen is easy to deform due to the internal stress in the processing process due to the large size, so that the flatness is poor, and the liquid crystal glass adsorbed on the integral platen is deformed, so that the bonding deviation of the liquid crystal glass is caused.

Disclosure of Invention

In order to overcome the technical defect that the workbench of the conventional COF bonding machine is easy to cause bonding deviation of liquid crystal glass, the invention provides a workbench for adjusting the flatness of the liquid crystal glass based on a bonding process.

The invention provides a workbench for adjusting the flatness of liquid crystal glass based on a bonding process, which comprises the following components:

a grid frame;

the adsorption tables are provided with a plurality of first-row grids which are arranged in a row along the left-right direction and positioned at the front end of the grid frame, each adsorption table is fixed on the grid frame through a first screw and is screwed with a jackscrew, and the head of the first screw and the head of the jackscrew are countersunk;

the adjustable support assembly is provided with a plurality of adjustable support assemblies and is positioned on each side wall of each grid except the first row of grids at the front end of the grid framework, the adjustable support assemblies comprise mounting blocks, adjusting rods, connecting nuts and locking nuts, the mounting blocks are fixed on the side walls of the grids, the adjusting rods are arranged up and down, the upper ends of the adjusting rods are fixedly connected with the connecting nuts, the adjusting rods are coaxial with the connecting nuts, and the lower ends of the adjusting rods are screwed on the mounting blocks and locked by the locking nuts;

the platform cover plate is provided with a plurality of residual grids, except for the first row of grids at the front end, of the grid frame in one-to-one correspondence, is supported above the connecting nuts and is tightly pressed by second screws in the connecting nuts through tail end threaded connection, and the heads of the second screws are countersunk.

Optionally, the grid framework includes:

a peripheral rectangular frame;

an inner well frame including a first partition plate disposed front to back and a second partition plate disposed left to right;

the L-shaped connecting pieces are provided with a plurality of connecting pieces and are arranged at each right-angle structure formed by the first partition plate and the second partition plate or formed by the inner well grid frame and the peripheral rectangular frame.

Optionally, the peripheral rectangular frame and the internal well frame are both aluminum frames.

Optionally, two adjacent absorption platen interval distributions form the installation clearance, the workstation of liquid crystal glazing roughness is adjusted based on bonding technology still includes multiunit PCB supporting component, and every group PCB supporting component all corresponds an installation clearance setting, PCB supporting component includes:

a mounting plate fixed in the second row of grids at the front end of the grid frame;

a cylinder, the cylinder body of which is fixed on the mounting plate and the output part moves along the front-back direction;

and the supporting strip plate is fixed on the output part of the air cylinder, is arranged in the installation gap and has an operating state that the front end of the supporting strip plate extends outwards in front of the adsorption platen.

Optionally, the PCB support assembly further includes:

the fixed seat is fixed at the front end of the grid frame;

the supporting wheels are arranged on the fixed seat and are arranged left and right along the axis;

the lower surface of the support slat is lapped on the support wheel when the support slat is in a working state.

Optionally, the fixing base is provided with a strip-shaped mounting hole, the length direction of the strip-shaped mounting hole is arranged up and down, and the fixing base is fixed at the front end of the grid frame through a bolt penetrating through the strip-shaped mounting hole.

Optionally, the workbench for adjusting the flatness of the liquid crystal glass based on the bonding process further comprises:

and the frame bottom plate is fixedly connected below the middle part of the grid frame and is suitable for being connected with a driving source.

Compared with the prior art, the technical scheme provided by the invention has the following advantages:

1) The workbench is formed by jointly splicing the plurality of platform cover plates and the adsorption bedplate, so that the internal stress generated by larger size can be avoided, the bedplate can be prevented from deforming, and the bonding deviation of the liquid crystal glass caused by the deformation of the bedplate can be avoided;

2) According to the workbench, the platform cover plates are connected and assembled, so that the adaptive workbench can be assembled freely according to the sizes of the liquid crystal glass, the adaptability of equipment to the liquid crystal glass with different sizes is improved, and the universality of the equipment is enhanced;

3) According to the workbench disclosed by the invention, only the adsorption bedplate at the front end is provided with the adsorption holes, and only the front end is connected with the COF when the liquid crystal glass is bonded, so that the adsorption bedplate can ensure the stability and flatness requirements of the front end of the liquid crystal glass when the workbench moves, the bonding requirements are met, and meanwhile, compared with the scheme that the whole bedplate is provided with the adsorption holes, the equipment cost is lower;

4) According to the workbench disclosed by the invention, the flatness of the adsorption bedplate can be adjusted through the jackscrews, and the flatness of the platform cover plate can be adjusted through the adjustable supporting component, so that the heights of all parts forming the workbench are consistent, and the flatness of the whole workbench can meet the precision requirement;

5) According to the workbench disclosed by the invention, the flatness is adjusted through the jackscrews and the adjustable supporting component, the debugging difficulty is low, and the debugging efficiency is high.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic view showing the overall structure of a workbench according to an embodiment of the invention;

FIG. 2 shows an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view showing the rest of the structure of the table with the platform cover plate removed and the suction platen according to the embodiment of the present invention;

FIG. 4 shows a partial enlarged view at B in FIG. 3;

FIG. 5 is a schematic view of an adjustable support assembly according to an embodiment of the present invention;

FIG. 6 shows a partial enlarged view at C in FIG. 3;

fig. 7 is a schematic view showing a mounting structure of a supporting wheel in the embodiment of the present invention.

In the figure:

1. a grid frame; 11. a peripheral rectangular frame; 12. an internal well frame; 121. a first separator; 122. a second separator; 13. an L-shaped connector; 2. an adsorption platen; 21. a first screw; 22. a jackscrew; 3. an adjustable support assembly; 31. a mounting block; 32. an adjusting rod; 33. a coupling nut; 34. a lock nut; 4. a platform cover plate; 41. a second screw; 5. a PCB support assembly; 51. a mounting plate; 52. a cylinder; 53. a support slat; 54. a fixing seat; 541. a strip-shaped mounting hole; 55. a support wheel; 6. a frame base plate.

Detailed Description

In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be made. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.

In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the invention.

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In one embodiment, referring to fig. 1 to 6, a work table for adjusting flatness of liquid crystal glass based on a bonding process includes a grid frame 1, an adsorption platen 2, an adjustable support assembly 3, and a platform cover plate 4. The adsorption bedplate 2 is provided with a plurality of adsorption bedplate 2 which are arranged in a row along the left-right direction and are positioned on a first row of grids at the front end of the grid frame 1, each adsorption bedplate 2 is fixed on the grid frame 1 through a first screw 21 and is screwed with a jackscrew 22, and the head of the first screw 21 and the head of the jackscrew 22 are countersunk. The adjustable support assembly 3 is provided with a plurality of and is located on each side wall of each grid except the first grid of the front end of the grid frame 1, the adjustable support assembly 3 comprises a mounting block 31, an adjusting rod 32, a connecting nut 33 and a locking nut 34, the mounting block 31 is fixed on the side wall of the grid, the adjusting rod 32 is arranged up and down, the upper end of the adjusting rod 32 is fixedly connected with the connecting nut 33, the adjusting rod 32 is coaxial with the connecting nut 33, and the lower end of the adjusting rod 32 is screwed on the mounting block 31 and locked through the locking nut 34. The platform cover plate 4 is provided with a plurality of second screws 41 which are in one-to-one correspondence with the rest grids of the grid frame 1 except the first row of grids at the front end, the platform cover plate 4 is supported above the connecting nuts 33 and is tightly pressed by the second screws 41 with the tail ends screwed into the connecting nuts 33, and the heads of the second screws 41 are countersunk heads.

Specifically, referring to fig. 3, 4 and 6, the grid frame 1 includes a peripheral rectangular frame 11, an inner well frame 12 and an L-shaped connector 13. The inner well frame 12 includes a first partition 121 and a second partition 122, the first partition 121 being disposed front to back, and the second partition 122 being disposed left to right. The L-shaped connection member 13 is provided in plurality and installed at each right angle structure formed by the first and

second partitions

121 and 122 or the inner well frame 12 and the peripheral rectangular frame 11.

More specifically, referring to fig. 6, the first partition 121 has an overall strip structure, and both ends of the first partition 121 are respectively connected to the front and rear frames of the peripheral rectangular frame 11; the second partition plates 122 are arranged in segments, and each segment is located between two adjacent first partition plates 121 or between a first partition plate 121 and the peripheral rectangular frame 11. This structure makes the overall rigidity of the grid frame 1 higher by the rigidity of the first separator 121 itself. Of course, as an alternative embodiment, the first partition 121 and the second partition 122 may be both provided in sections; the first partition plate 121 may be arranged in segments, and the second partition plate 122 may be in an overall strip-like structure.

It will be readily appreciated that the peripheral rectangular frame 11 is of unitary construction, and may be of unitary construction, or may be formed from a plurality of segments joined together, but is required to be capable of forming a complete rectangle.

It will be readily appreciated that, referring to fig. 3, the two mutually perpendicular faces of the l-shaped connector 13 should respectively be in abutment with the two mutually perpendicular faces of the right-angled structure.

More specifically, referring to fig. 4, the l-shaped connector 13 is fixed to the side wall of the inner well frame 12 or the outer rectangular frame 11 by screws. The installation is convenient, and the fixation is firm. Of course, as an alternative embodiment, the L-shaped connector 13 may be fastened to the side wall of the inner well frame 12 or the peripheral rectangular frame 11 by means of snap or glue, etc.

More specifically, the peripheral rectangular frame 11 and the inner well frame 12 are both aluminum frames. The material is light and can meet the requirement of structural rigidity. Of course, as an alternative embodiment, the peripheral rectangular frame 11 and the inner well frame 12 may be made of alloy or stainless steel or other materials.

The integral structure of the peripheral rectangular frame 11 of the grid frame 1 has a tightening effect on the inner grid frame 12, so that the rigidity and the stability of the whole grid frame 1 are higher.

Of course, in other embodiments, the grid frame 1 may omit the peripheral rectangular frame 11, and the first partition 121 or the second partition 122 may be disposed at the peripheral edge.

Specifically, referring to fig. 1, fourteen suction platens 2 are provided. Of course, as alternative embodiments, the suction platen 2 may be provided as two or five or more. It is to be noted that the number of the suction platens 2 depends on the individual size of the suction platens 2, the pitch of the suction platens 2, and the size of the liquid crystal glass.

Specifically, the adjacent suction platens 2 may be arranged at intervals or may be arranged in contact with each other.

It is easy to understand that the first screw 21 is a screw penetrating the adsorption platen 2 and screwed with the grid frame 1, and the first screw 21 and the adsorption platen 2 do not need to be screwed; the jackscrews 22 penetrate through the adsorption platen 2 and are in threaded connection with the adsorption platen 2, the tail ends of the jackscrews 22 are abutted to the top surface of the grid frame 1, and the height of the adsorption platen 2 is adjusted by screwing the jackscrews 22.

It is easy to understand that the top surface of the adsorption platen 2 should be provided with a counter bore, so that the head of the first screw 21 and the head of the jackscrew 22 can be placed in the counter bore, thereby avoiding that the first screw 21 and the jackscrew 22 protrude out of the top surface of the adsorption platen 2 and affect the flatness of the adsorption platen 2.

Specifically, the head of the first screw 21 and the head of the jackscrew 22 may be tapered, may be cylindrical, or may have other common shapes.

It is easy to understand that the top surface of the coupling nut 33 should be provided as a plane to be able to smoothly support the platform cover 4.

In particular, adjacent platform cover plates 4 can be arranged at intervals or can be arranged in contact. It should be noted that when a stand-off arrangement is selected, the phase separation distance should be determined according to the flexibility adaptability of the liquid crystal glass itself, so as to avoid deformation of the liquid crystal glass caused by an excessively large distance.

It is easy to understand that the second screw 41 should penetrate the platform cover 4, no screw connection is needed between the second screw 41 and the platform cover 4, and the tail end of the second screw 41 is screwed in the connecting nut 33, and the head compresses the platform cover 4.

It is easy to understand that the top surface of the platform cover plate 4 should be provided with a counter bore so that the head of the second screw 41 can be placed in the counter bore, thereby avoiding the second screw 41 protruding outside the top surface of the platform cover plate 4 and affecting the flatness of the platform cover plate 4.

In the working table of this embodiment, when the working table is implemented, the liquid crystal glass is supported on the whole working table, the front end strip-shaped region is supported on the adsorption platen 2 and is adsorbed and fixed, and the liquid crystal glass with the most area at the middle and rear part is supported on the platform cover plate 4.

The height of the adsorption platen 2 is operated as follows: the jackscrew 22 is screwed forward to enable the corresponding part of the adsorption bedplate 2 to be heightened; the jackscrews 22 are reversely screwed to lower the corresponding parts of the adsorption bedplate 2; the overall raising or lowering of the suction platen 2 is achieved by adjusting the jackscrews 22 at various locations of the suction platen 2. The adjustment of the platform cover 4 operates as follows: the locking nut 34 is unscrewed, then the adjusting rod 32 is screwed, so that the height of the connecting nut 33 is changed, and when the connecting nut 33 is adjusted to a proper height, the locking nut 34 is screwed, so that the adjusting rod 32 is fixed relative to the mounting block 31; the adjustable support assembly 3 for adjusting each part of the platform cover plate 4 according to the step realizes the integral lifting or lowering of the platform cover plate 4. The heights of the adsorption tables 2 and the platform cover plates 4 are adjusted so that all the adsorption tables 2 and the platform cover plates 4 are at the same height, and therefore the flatness of the whole workbench is guaranteed.

When in bonding, the front end of the liquid crystal glass extends out of the adsorption platen 2 and is supported on a pressing head of a bonding machine, a mechanical arm is used for lapping the COF above the front end of the liquid crystal glass, and then an upper pressing head of the bonding machine is lowered to bond the COF and the liquid crystal glass.

The workbench of the embodiment has the following advantages: the workbench is formed by jointly splicing the plurality of platform cover plates 4 and the adsorption bedplate 2, so that the internal stress generated by larger size can be avoided, the bedplate deformation can be avoided, and the bonding deviation of the liquid crystal glass caused by the bedplate deformation can be avoided; secondly, as the platform cover plate 4 is connected and assembled, the adaptive workbench can be freely assembled according to the size of the liquid crystal glass, and the adaptability of the equipment to the liquid crystal glass with different sizes is improved, so that the universality of the equipment is enhanced; thirdly, only the adsorption platen 2 at the front end is provided with adsorption holes, and because the front end is only connected with the COF when the liquid crystal glass is bound, the adsorption platen 2 can ensure the stability and flatness requirements of the front end of the liquid crystal glass when the workbench moves, and meets the binding requirements, and meanwhile, compared with the scheme that the whole platen is provided with the adsorption holes, the equipment cost is lower; fourth, the flatness of the adsorption bedplate 2 can be adjusted through jackscrews 22, and the flatness of the platform cover plate 4 can be adjusted through the adjustable support assembly 3, so that the heights of all parts forming the workbench are consistent, and the flatness of the whole workbench can meet the precision requirement; fifthly, the flatness is adjusted through the jackscrews 22 and the adjustable supporting component 3, the debugging difficulty is low, and the debugging efficiency is high.

In some embodiments, referring to fig. 2 and 6, two adjacent suction platens 2 are spaced apart to form a mounting gap, and the table further includes a plurality of sets of PCB support assemblies 5, each set of PCB support assemblies 5 being disposed in correspondence with one mounting gap, the PCB support assemblies 5 including a mounting plate 51, an air cylinder 52, and a support slat 53. The mounting plate 51 is fixed in the second row of grids at the front end of the grid framework 1; the cylinder body of the cylinder 52 is fixed to the mounting plate 51 and the output portion moves in the front-rear direction; the support lath 53 is fixed to the output portion of the cylinder 52, and the support lath 53 is placed in the installation gap and has an operating state in which the front end extends out in front of the suction platen 2.

Specifically, the cylinder 52 is a slide cylinder 52, and can be firmly connected with the support lath 53. Of course, as an alternative embodiment, the cylinder 52 may be a common telescopic cylinder 52, and the piston rod may be connected to the support slat 53.

First, the related process of the PCB will be described: the conventional COF bonding machine not only can bond the COF and the liquid crystal glass, but also can bond the COF and the PCB. The workbench adopted by the conventional COF bonding machine is provided with a gantry bar frame fixed at the front end of the integral bedplate, and a PCB is supported on the gantry bar frame, but the gantry bar frame is low in rigidity because of large left and right spans and thin design, and the phenomenon of middle part lower couch is easy to occur, so that the middle part of the PCB is deformed, and the PCB is bonded and deviated.

When the PCB is supported on the supporting strip plate 53 in the bonding process, when the supporting strip plate 53 is about to contact the lower pressing head, the supporting strip plate 53 is retracted under the action of the air cylinder 52, so that the PCB falls onto the lower pressing head, the COF is lapped above the PCB by the mechanical arm, and then the upper pressing head of the bonding machine is lowered to bond the COF and the PCB. It should be noted that, since the weight of the supporting strip 53 is smaller than that of the PCB, the PCB will drop onto the pressing head under the action of its own weight when the supporting strip 53 is retracted, and the supporting strip 53 will not be moved to be dislocated.

In the working table of the embodiments, the air cylinders 52 drive the supporting laths 53 to support the PCB, and rigidity can be ensured because the front-back span of the PCB is smaller, so that bonding deviation caused by deformation is avoided.

Further, referring to fig. 2, 6 and 7, the pcb support assembly 5 further includes a fixing base 54 and a support wheel 55. The fixed seat 54 is fixed at the front end of the grid frame 1; the supporting wheels 55 are mounted on the fixing seat 54 and arranged on the left and right sides of the axis; the lower surface of the support strip 53 in the operating state is lapped over the support wheel 55. The supporting wheels 55 can support the front ends of the supporting laths 53, so that the rigidity of the supporting laths 53 is improved, and the supporting laths 53 are prevented from being deformed; and rolling contact with the support lath 53, and will not cause excessive resistance to the extension of the support lath 53.

Further, referring to fig. 7, the fixing base 54 is provided with bar-shaped mounting holes 541, the length direction of the bar-shaped mounting holes 541 is arranged up and down, and the fixing base 54 is fixed to the front end of the grid frame 1 by bolts penetrating the bar-shaped mounting holes 541. By the arrangement of the bar-shaped holes, the up-and-down position adjustment of the fixing seat 54 on the grid frame 1 can be realized, so that the top surface of the supporting wheel 55 and the lower surface of the supporting slat 53 are in the same horizontal plane. Compared with the scheme that the fixing seat 54 is fixed relative to the position of the grid frame 1, the scheme can reduce the initial assembly precision of the fixing seat 54 and is convenient to adjust.

In some embodiments, referring to fig. 3, the work table for adjusting the flatness of the liquid crystal glass based on the bonding process further includes a frame base plate 6. A frame base plate 6 is fixedly connected below the middle part of the grid frame 1, the frame base plate 6 being adapted to be connected to a driving source.

Specifically, the frame base plate 6 may be connected to a rotation driving source to realize rotation of the entire table; the linear drive source may also be connected to effect linear movement of the entire table.

The work table of these embodiments can realize various movements by connecting the frame base plate 6 to the drive source. Thus, the functionality of the workbench is increased, and meanwhile, the workbench structure is more modularized and simplified.

The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.

Claims

1. Workbench for adjusting flatness of liquid crystal glass based on bonding process, which is characterized by comprising:

a grid frame (1);

the adsorption tables (2) are provided with a plurality of grids which are arranged in a row along the left-right direction and are positioned on a first row of grids at the front end of the grid frame (1), each adsorption table (2) is fixed on the grid frame (1) through a first screw (21) and is screwed with a jackscrew (22), and the heads of the first screw (21) and the jackscrew (22) are countersunk;

the adjustable support assembly (3) is provided with a plurality of adjustable support assemblies and is positioned on each side wall of each grid except for a first row of grids at the front end of the grid frame (1), the adjustable support assembly (3) comprises a mounting block (31), an adjusting rod (32), a connecting nut (33) and a locking nut (34), the mounting block (31) is fixed on the side wall of the grid, the adjusting rod (32) is arranged up and down, the upper end of the adjusting rod (32) is fixedly connected with the connecting nut (33) and the adjusting rod (32) is coaxial with the connecting nut (33), and the lower end of the adjusting rod (32) is screwed on the mounting block (31) and is locked through the locking nut (34);

the platform cover plates (4) are provided with a plurality of residual grids, except for a first row of grids at the front end, of the grid framework (1) in one-to-one correspondence, the platform cover plates (4) are supported above the connecting nuts (33) and are tightly pressed by second screws (41) in the connecting nuts (33) through tail end threaded connection, and the heads of the second screws (41) are countersunk heads.

2. A bonding process-based work table for adjusting flatness of liquid crystal glass according to claim 1, characterized in that the grid frame (1) comprises:

a peripheral rectangular frame (11);

an inner well frame (12) including a first partition (121) and a second partition (122), the first partition (121) being arranged in front-to-back direction, the second partition (122) being arranged in left-to-right direction;

and L-shaped connecting pieces (13) which are provided in plurality and are installed at each right-angle structure formed by the first partition plate (121) and the second partition plate (122) or formed by the inner well grid frame (12) and the peripheral rectangular frame (11).

3. The bonding process-based workbench for adjusting flatness of liquid crystal glass according to claim 2, wherein the peripheral rectangular frame (11) and the inner well frame (12) are both aluminum frames.

4. The bonding process-based workbench for adjusting flatness of liquid crystal glass according to claim 1, wherein two adjacent adsorption platens (2) are distributed at intervals to form an installation gap, the bonding process-based workbench for adjusting flatness of liquid crystal glass further comprises a plurality of groups of PCB support assemblies (5), each group of PCB support assemblies (5) is arranged corresponding to one installation gap, and the PCB support assemblies (5) comprise:

a mounting plate (51) fixed to the grid frame (1) in the second row of the front end grids;

a cylinder (52) which is fixed to the mounting plate (51) and whose output section moves in the front-rear direction;

and a support slat (53) fixed to an output portion of the cylinder (52), the support slat (53) being disposed in the mounting gap and having an operating state in which a front end thereof extends outwardly in front of the suction platen (2).

5. A bonding process-based work table for adjusting flatness of liquid crystal glass according to claim 4, characterized in that the PCB support assembly (5) further comprises:

a fixing base (54) fixed at the front end of the grid frame (1);

a support wheel (55) mounted on the fixed seat (54) and arranged with the axis left and right;

the lower surface of the supporting strip plate (53) is lapped on the supporting wheel (55) when the supporting strip plate is in the working state.

6. The workbench for adjusting the flatness of liquid crystal glass based on the bonding process according to claim 5, wherein the fixing base (54) is provided with strip-shaped mounting holes (541), the length direction of the strip-shaped mounting holes (541) is arranged up and down, and the fixing base (54) is fixed at the front end of the grid frame (1) through bolts penetrating through the strip-shaped mounting holes (541).

7. The bonding process-based table for adjusting flatness of liquid crystal glass according to any one of claims 1 to 6, further comprising:

and the frame bottom plate (6) is fixedly connected below the middle part of the grid frame (1), and the frame bottom plate (6) is suitable for being connected with a driving source.