An automated assembly process for a micro-pitch module product

Abstract

The present invention relates to the field of manufacturing display screen modules, and provides an automated assembly process for micro-pitch module products. Two PCB boards are selected, and a measuring device measures the sizes of the two PCB boards; the controller obtains the sizes and calculates the gap size N between the A board and the B board during installation according to a preset formula, and pushes the A board and the B board to preset positions on the workbench. There is a gap between the A board and the B board for the insertion of the limiting piece insert block. The bottom shell is covered on the back of the two light boards, and the limiting piece insert block is inserted into the gap between the A board and the B board. The A board and the B board are pushed by a pushing device so that the inner sides of the A board and the B board are both in tight contact with the limiting piece insert block. The bottom shell and the two PCB boards are fixedly connected by screws. After passing the test, the assembly is completed to obtain the finished module. By obtaining the sizes of the two PCB boards and inserting the limiting piece insert block between the PCB boards, the distance between the two PCB boards can be controlled, thereby avoiding the problem of bright and dark lines appearing on the surface of the display screen.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing display modules, and particularly to an automated assembly process for micro-pitch module products. Background Art

[0002] For existing small-pitch COB products used in displays, the surface is directly covered with glue to protect the lamp beads. The splicing gap of the COB module is extremely small. If the product pitch is too small, after splicing two modules, due to errors in manufacturing the PCB board, the distance between the two lamp beads on the left and right at the splicing joint of the two PCB boards will be greater than the product pitch, resulting in obvious bright and dark lines at the splicing part of the display screen surface after lighting. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide an automated assembly process for micro-pitch module products to solve the technical problems mentioned above in the prior art.

[0004] One of the purposes of the present invention is achieved by adopting the following technical solution: An automated assembly process for micro-pitch module products, the steps of which are as follows:

[0005] S1: Select two PCB boards that have completed chip mounting. The two PCB boards are respectively board A and board B;

[0006] S2: Use a measuring device to measure the sizes of the two PCB boards, and respectively measure the size of board A as L A , and the size of board B as L B ;

[0007] S3: The controller obtains the sizes of board A and board B, and calculates the gap size N when installing between board A and board B according to a preset formula. The preset formula is:

[0008]

[0009] where L is the preset standard size. After the controller obtains the gap size N, select a spacer block with a thickness of N;

[0010] S4: Push board A and board B to the preset position on the workbench, and leave a gap between board A and board B for inserting the spacer block.

[0011] S5: Cover the bottom case on the back of the two lamp boards. The bottom case is provided with a plurality of holes for inserting the spacer.

[0012] S6: Insert the spacer block into the gap between board A and board B, and use a pushing device to push board A and board B so that the inner sides of board A and board B are both in tight contact with the spacer block, that is, the size of the gap between board A and board B at this time is the gap size N;

[0013] S7: Fix the bottom case and the two PCB boards together by screws;

[0014] S8: Take out the limit piece insert block;

[0015] S9: Measure the assembled module again, measure the point spacing dimension at the splicing place of the PCB, and if the test is qualified, the assembly is completed to obtain the finished module.

[0016] Further, the preset position is the position where the two PCB boards are placed on the workbench, and when the PCB board is in the preset position, at least one direction of the outer side of the PCB board is limited, and the other directions of the PCB board cooperate with the pushing device for pushing.

[0017] Further, the workbench includes a fixed stop block, the fixed stop block is an L-shaped convex block, the PC board is rectangular, the fixed stop block abuts against one of the up and down directions of the PCB board, and the fixed stop block abuts against one of the left and right directions of the PCB board.

[0018] Further, the pushing device includes a linear driving device and a locking device, an active push block is provided at the active end of the linear driving device, and the active push block abuts against the PCB board in a matching manner.

[0019] Further, the limit piece insert block is a steel sheet with a thickness of N.

[0020] Further, the measuring device is a two-dimensional measuring instrument.

[0021] Further, the fixed connection is that one side of the PCB board is closely attached to one side of the bottom case.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] In the present invention, the sizes of the PCB boards are pre-detected before the two PCB boards are spliced, so as to exclude the PCB boards with too large sizes, avoid the problem that the distance between the left and right two lamp beads at the splicing place of the two PCB boards is too large and dark lines are generated after the two modules are spliced. At the same time, for the PCB boards with sizes smaller than the standard size, the sizes to be reserved for the two PCB boards are calculated through size calculation. When the two PCB boards are spliced, a limit piece insert block is placed at the splicing place of the two PCB boards, so that the gap size between the two PCB boards can be effectively controlled, thereby effectively avoiding obvious bright and dark lines at the splicing part of the display screen surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the process steps of the present invention;

[0025] Figure 2 is a schematic diagram of the structure of the workbench and the fixed stop block of the present invention;

[0026] Figure 3 This is a schematic diagram of the limit piece insertion block structure of the present invention;

[0027] In the figure:

[0028] 1. Workbench; 11. Fixed stop block; 111. Long horizontal block; 112. Long vertical block; 113. Positioning hole;

[0029] 2. Bottom shell; 21. Hole position;

[0030] 3. Limit piece insertion block; 31. Fixed block; 32. Steel sheet;

[0031] 4. Pushing device; 41. Linear driving device; 411. Guide shaft; 412. Shaft seat; 42. Locking device;

[0032] 5. Pressing block;

[0033] 6. Movable push block. Specific implementation manners

[0034] Next, in combination with the attached Figure 1 to the attached Figure 3 and specific implementation manners, the present invention will be further described. It should be noted that, on the premise of no conflict, any combination can be formed between the following described embodiments or technical features to form a new embodiment.

[0035] The embodiment of the present invention provides an automatic assembly process for a micro-pitch module product. As Figure 1 shown, the process steps are as follows:

[0036] S1. Product selection: A module product includes a bottom shell 2 and multiple PCB boards. In this embodiment, two finished PCB boards after soldering are selected. The two PCB boards are respectively board A and board B. One side of the PCB board is the display surface, and the other side is the back surface. Place the PCB board with the display surface facing down on the assembly line. Generally, a conveyor belt is used to transport the PCB board from the previous process treatment to the next process treatment. Select a bottom shell 2 and push it to the workbench 1 through the assembly line;

[0037] S2. Product measurement: The two PCB boards move along the assembly line to the measuring device. The measuring device generally uses a two-dimensional measuring instrument. The sizes of the two PCB boards are measured by the grating ruler of the two-dimensional instrument. The size of board A is measured as L A , and the size of board B is measured as L BIn this embodiment, a rectangular PCB board is selected, which is convenient for measurement and calculation, and also convenient for splicing and installation. The size of the standard PCB board is 150mm*168.75mm, the size of the A board is 149.95mm*168.7mm, and the size of the B board is 149.95mm*168.75mm. This splicing needs to connect the length sides of the A board and the B board, so it is only necessary to calculate the width of the two PCB boards, that is, L A =149.95mm, L B =149.95mm, the secondary element measuring instrument transmits the obtained data to the controller, and pushes the PCB board toward the workbench 1 through the assembly line;

[0038] S3, size calculation: The controller obtains the size of the A plate and the B plate, and calculates the gap size N between the A plate and the B plate during installation according to the preset formula. The preset formula is:

[0039]

[0040] Wherein, L is a preset standard size. After the controller obtains the gap size N, it selects the limit plate insert block 3 with a thickness of N. In the embodiment, N=0.05mm is obtained by calculation. Therefore, the limit plate insert block 3 with a thickness of 0.05mm is selected;

[0041] The calculation basis of the above formula is that if the splicing part of the display screen is to be displayed normally, the dot spacing between the lamp beads between adjacent PCB boards needs to be X A-B Equal to the standard dot spacing X, the patches are symmetrically and evenly arranged on the PCB board during patch installation, and the dot spacing between adjacent lamp beads is X. If the size of the PCB board is standard, and the number of lamp beads arranged along the width direction of the PCB board is M, then the width of the PCB board is L = M*X, and the position of the outermost lamp bead to the edge of the PCB board is However, since the size of the A board is not standard, especially the PCB board that is smaller than the standard size, the size from the outermost lamp bead to the side of the A board is X A , at this time, X A Less than At this time, the size formula of plate A is:

[0042] L A =X*(M-1)+2X A

[0043] By converting the formula:

[0044]

[0045] Similarly, we can get:

[0046] L B= X * (M - 1) + 2X B

[0047] Obtained through the conversion formula

[0048]

[0049] When it is necessary to display the splicing part of the display screen normally, then make

[0050] X A-B = X = X A + X B + N,

[0051] Obtained through the conversion formula

[0052] N = X - (X A + X B )

[0053] Substitute the above formulas of X A and X B to obtain

[0054]

[0055] Among them, N is the gap between board A and board B during installation, X A-B is the pitch between the lamp beads between adjacent PCB boards, X 标 is the standard pitch, X A is the distance from the outermost lamp bead of board A to the edge of board A, X B is the distance from the outermost lamp bead of board B to the edge of board B, and M is the number of lamp beads arranged along the width direction of the PCB board;

[0056] S4. Product presetting: Push the A board and the B board to the preset positions on the workbench 1. The preset positions are the positions where two PCB boards are placed on the workbench 1 by the manipulator. When the PCB boards are in the preset positions, there is at least one-direction limitation on the outer sides of the PCB boards. There is a fixed stop block 11 on the workbench 1. The fixed stop block 11 is an L-shaped convex block. The fixed stop block 11 abuts against one of the up-and-down directions of the PCB board and abuts against one of the left-and-right directions of the PCB board. In this embodiment, the fixed stop block 11 is arranged at the upper left corners of the two PCB boards, including a long horizontal block 111 arranged above and a long vertical block 112 arranged on the left side of the PCB board. There are positioning holes 113 on the long horizontal block 111 and the long vertical block 112. Positioning is carried out through the positioning posts arranged on the workbench 1 and fixed to the workbench 1 by bolts. The fixed stop block 11 is made of aluminum, and the inner side is subjected to surface hard anodizing treatment to ensure accuracy. The upper parts of the two PCB boards abut against the long horizontal block 111, and the left side of the A board abuts against the fixed long vertical block 112. The B board is arranged on the right side of the A board. There is a gap for the insertion of the limit piece insert block 3 between the A board and the B board. The other directions of the PCB board are in pushing cooperation with the pushing device 4. There is a gap for the insertion of the limit piece insert block 3 between the A board and the B board.

[0057] S5: Bottom shell 2 presetting: Cover the bottom shell 2 on the backs of the two lamp boards by the manipulator. The bottom shell 2 is provided with a plurality of hole positions 21 for inserting limit pieces. The hole positions 21 are in a vertical runway shape, and the central axes of the hole positions 21 are on a vertical straight line.

[0058] S6: Gap control: Take the limit piece insert block 3 with the corresponding thickness by the manipulator, insert this limit piece insert block 3 from the hole position 21, and insert it into the gap between the A board and the B board. Push the A board and the B board by the pushing device 4 so that the inner sides of the A board and the B board are both tightly abutted against the limit piece insert block 3. That is, the size of the gap between the A board and the B board at this time is the gap size N.

[0059] S7. Bottom shell 2 installation: Fix the bottom shell 2 to the two PCB boards by screws.

[0060] S8. Remove the insert block: Remove the limit piece insert block 3.

[0061] S9. Product completion: Measure the assembled module product, measure the point spacing size at the splicing position of the two PCB boards. If the test is qualified, the assembly is completed to obtain the finished module product.

[0062] Specifically, such as Figure 2As shown, in some embodiments, the pushing device 4 includes a linear driving device 41 and a locking device 42. An active push block 6 is provided at the active end of the linear driving device 41, and the active push block 6 is in abutting cooperation with the PCB board. The linear driving device 41 includes a guiding shaft 411 and a shaft seat 412. The guiding shaft 411 moves linearly along the shaft seat 412. The movement of the guiding shaft 411 drives the movement of the active push block, thereby pushing the right side of the B board, the lower sides of the A board and the B board. The locking device 42 uses a drag-type quick clamp. When the right side of the A board and the left side of the B board are both tightly abutted against the limiting piece socket, quick locking is performed to fix the position of the PCB board.

[0063] In some embodiments, as Figure 3 shown, the limiting piece insert block 3 includes a fixed block 31 and a steel sheet 32. The steel sheet 32 is fixed in the middle of the fixed block 31 and extends a certain distance from one end of the fixed block 31. In this embodiment, the dimension of the extended part of the steel sheet 32 is 10 mm, the width of the steel sheet 32 is 12 mm, and the thickness is 0.05 mm. The end face of the fixed block 31 where the steel sheet 32 is provided is preferably a plane to ensure the vertical state of the steel sheet 32 when the fixed block 31 is inserted.

[0064] The dimension of the steel sheet 32 can be 0.05 mm, 0.08 mm, etc. During use, select the corresponding thickness of the steel sheet 32 and insert the steel sheet 32 into the gap between the A board and the B board.

[0065] As Figure 2 shown, a pressing step can also be added before the gap control and the installation of the bottom case 2. The pressing step is as follows: a pressing block 5 is placed on the outer side of the PCB board to make the front of the bottom case 2 closely fit the inner side of the PCB board, and then screws are driven in from the back direction of the bottom case 2 to fixedly connect the bottom case 2 and the PCB. The pressing block 5 should not be too large to avoid affecting the driving in of the screws.

[0066] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. An automated assembly process for a micro-pitch module product, the steps of which are as follows: S1: Select two PCBs that have completed chip mounting. The two PCBs are respectively board A and board B. S2: Measure the sizes of two PCBs using a measuring device, and the size of board A is measured as L A , and the size of board B is measured as L B ; S3: The controller obtains the sizes of board A and board B, and calculates the gap size N when installing between board A and board B according to a preset formula. The preset formula is: Among them, L is the preset standard size. After the controller obtains the gap size N, select a spacer insert block with a thickness of N. S4: Push board A and board B to the preset position on the workbench. There is a gap between board A and board B for the spacer insert block to be inserted. S5: Cover the bottom case on the back of the two light boards. The bottom case is provided with a plurality of holes for inserting the spacer. S6: Insert the spacer insert block into the gap between board A and board B. Push board A and board B through the pushing device so that the inner sides of board A and board B are both in tight contact with the spacer insert block. That is, the size of the gap between board A and board B at this time is the gap size N. S7: Fix and connect the bottom case and the two PCBs with screws. S8: Take out the spacer insert block. S9: Measure the assembled module again, measure the pitch value at the PCB splicing point. If the test is qualified, the assembly is completed to obtain the finished module.

2. The automated assembly process of the micro-pitch module product according to claim 1, characterized in that, The preset position is the position where the two PCBs are placed on the workbench. And when the PCB is in the preset position, at least one direction of the outer side of the PCB is limited, and the other directions of the PCB cooperate with the pushing of the pushing device.

3. The automated assembly process of the micro-pitch module product according to claim 2, wherein, The workbench includes a fixed stopper. The fixed stopper is an L-shaped convex block. The PCB is rectangular. The fixed stopper abuts against one of the up and down directions of the PCB, and the fixed stopper abuts against one of the left and right directions of the PCB.

4. The automated assembly process of the micro-spacing module product according to claim 1, characterized in that, The pushing device includes a linear driving device and a locking device. The movable end of the linear driving device is provided with a movable push block, and the movable push block abuts against the PCB in a matching manner.

5. The automated assembly process of the micro-pitch module product according to claim 1, characterized in that, The spacer insert block is a steel sheet with a thickness of N.

6. The automated assembly process of the micro-pitch module product according to claim 1, wherein The measuring device is a two-dimensional measuring instrument.

7. The automated assembly process of the micro-pitch module product according to claim 1, characterized in that, The fixed connection means that one side of the PCB is closely attached to one side of the bottom case.

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