PCB etching device

Abstract

The invention discloses a PCB (printed circuit board) etching device, which relates to the field of circuit board etching, and comprises an etching pool, a central column, a lifting mechanism, a turnover mechanism, a clamping plate mechanism and a pick-and-place mechanism, the central column is rotatably arranged in the etching pool, the lifting mechanism, the turnover mechanism and the clamping plate mechanism form an etching part, and the pick-and-place mechanism is arranged in the etching pool. A plurality of etching parts are arranged on the side face of the central column at equal intervals in the circumferential direction, the etching parts are arranged on the side face of the central column rotating intermittently, etching liquid in the etching pool is stirred, it is ensured that the etching effects of a plurality of circuit boards in the etching pool are consistent, the turnover mechanism drives the clamping plate mechanism with two clamping parts to turn over by 180 degrees, and therefore the circuit boards are prevented from being damaged. Therefore, the board taking assembly and the board placing assembly outside the etching pool can continuously take and place the circuit board without position adjustment, and the problem that when the circuit board on the clamping part is placed into and taken out of the etching pool, the consistency of the etching effect of the upper area and the lower area of the circuit board is poor due to the fact that the upper portion and the lower portion of the circuit board make contact with the etching liquid for different time lengths is solved.

Description

Technical Field

[0001] The present invention relates to the field of circuit board etching, and more particularly to a PCB circuit board etching device. Background Art

[0002] In the etching process of the circuit board production line, an etching solution is required to etch the printed circuit board. There are mainly three types of etching devices: fixed type, vertical type, and horizontal type.

[0003] The fixed etching device immerses the circuit board into the etching tank filled with the etching solution. Usually, multiple circuit boards are manually placed into and taken out of the etching tank. The operations of taking and placing the boards are inconvenient, and it is not conducive to improving the etching efficiency and the automation upgrade and modification of the production line. In addition, when the circuit board is vertically placed during the board placement and removal, the contact time of the upper and lower parts of the circuit board with the etching solution is inconsistent, resulting in poor consistency of the etching effect in each area of the circuit board, thereby further reducing the etching accuracy of the fixed etching device. However, due to the low hardware cost and maintenance cost of the fixed etching device and its simple operation, it is still widely used in the field of non-high-precision etching. Therefore, it is still necessary to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a PCB circuit board etching device to solve the technical problems mentioned in the background art that the fixed etching device usually manually places and removes multiple circuit boards into and out of the etching tank, the operations of taking and placing the boards are inconvenient, and the consistency of the etching effect in each area of the circuit board is poor, reducing the etching accuracy of the fixed etching device.

[0005] Based on the above purpose, the present invention provides a PCB circuit board etching device, including an etching tank, and further including a central column, a lifting mechanism, a flipping mechanism, a clamping plate mechanism, and a taking and placing mechanism. The central column is rotatably arranged in the etching tank. The lifting mechanism is arranged on the side of the central column. The clamping plate mechanism is connected to the lifting mechanism through the flipping mechanism. The taking and placing mechanism is arranged outside the etching tank. The lifting mechanism, the flipping mechanism, and the clamping plate mechanism form an etching part. A plurality of etching parts are circumferentially and equally spaced on the side of the central column, and the angle between adjacent etching parts is not less than 90°. The taking and placing mechanism includes a board taking component and a board placing component distributed in the horizontal direction. The clamping plate mechanism has two clamping parts distributed in the horizontal direction. The flipping mechanism drives the clamping plate mechanism to flip 180°, so as to exchange the positions of the two clamping parts and flip the circuit board clamped by the clamping part by 180°.

[0006] Further, a suspension is provided at the top of the etching tank, and a rotary drive assembly connected to the central column is provided on the suspension.

[0007] Further, the lifting mechanism includes a lead screw, a carrier table, and a first driven gear. The lead screw is rotatably arranged on the side of the central column. The carrier table is arranged on the lead screw, and the first driven gear is arranged at the top end of the lead screw. An eccentric shaft is rotatably arranged on the suspension, and the eccentric shaft is located on the side of the suspension close to the picking and placing mechanism. A first driving gear is arranged on the eccentric shaft. A plurality of the first driven gears are sequentially engaged with the first driving gear as the central column rotates. A lifting driving assembly connected to the eccentric shaft is arranged on the suspension.

[0008] Further, the flipping mechanism includes a worm, a worm wheel, a spline shaft, and a second driven gear. The worm wheel is rotatably arranged on the carrier table through a worm wheel shaft. The worm is rotatably arranged on the central column and meshes with the worm wheel. The spline shaft is rotatably arranged on the central column. The worm is provided with a spline hole matched with the spline shaft, and the second driven gear is arranged at the upper end of the spline shaft. A second driving gear and a flipping driving assembly connected to the second driving gear are rotatably arranged on the suspension. The second driving gear is engaged with the second driven gear when the first driving gear is engaged with the first driven gear.

[0009] Further, the clamping plate mechanism includes a T-shaped frame, a support arm, an air bag, and a sub-joint. Support arms are arranged on both sides at the two ends of the T-shaped frame. The tail ends of the support arms are arranged on the T-shaped frame. The air bag is arranged on the support arm, and the sub-joint is arranged on the support arm and communicated with the air bag. Two support arms, the air bag, and the sub-joint on the same side form the clamping part. Limit grooves are arranged on the side of the two support arms on the same side close to each other, and the limit grooves penetrate through the front ends of the support arms far from the T-shaped frame. Embedding grooves for the air bag to be embedded are arranged on both sides of the limit grooves. An air distribution pipe communicating the sub-joint with the air bags on both sides is arranged on the support arm. Female joints for docking with the sub-joints are arranged on both the board picking assembly and the board placing assembly.

[0010] Further, both the board picking assembly and the board placing assembly include a vertical frame, a clamping cylinder, a clamping plate, a push-pull cylinder, and a slider. Clamping plates are arranged at the top and bottom on one side of the vertical frame. The clamping cylinder is arranged on the other side of the vertical frame and connected to the clamping plate. The slider is slidably arranged on one side of the vertical frame and is located between the two clamping plates. The push-pull cylinder is arranged on the other side of the vertical frame and connected to the slider through a U-shaped rod. The board picking assembly and the board placing assembly share the same push-pull cylinder, and the push-pull cylinder is connected to the U-shaped rod through a linkage rod. The board placing assembly further includes a finger cylinder arranged on the slider for clamping the circuit board. The sub-joint is arranged on the vertical frame, and a pneumatic assembly communicated with the sub-joint is arranged on the vertical frame.

[0011] Further, a plurality of rollers are rotatably provided at the bottom of the top clamping plate and the top of the bottom clamping plate.

[0012] Further, the picking and placing mechanism further includes a bench, a base, and a linear guide rail. The base is slidably arranged on the bench through the linear guide rail. The vertical frame is arranged on the base. The linear guide rail drives the base to approach and move away from the etching tank, so that the female connector is docked with the male connector on the corresponding side.

[0013] Further, a fitting sleeve is sleeved on the central column, and a side frame for installing a lead screw and a spline shaft is arranged on the side surface of the fitting sleeve.

[0014] Further, a plurality of reinforcing ribs are connected between the two support arms of the clamping part.

[0015] Advantages of the present invention: First, by arranging a plurality of etching parts on the side surface of the intermittently rotating central column, the present invention realizes the agitation of the etching solution in the etching tank and the change of the position of the circuit board during etching, ensuring the consistency of the etching effects of multiple circuit boards in the etching tank.

[0016] Second, the lifting mechanism, the flipping mechanism, and the clamping plate mechanism of the etching part of the present invention can not only sink the circuit board into the etching tank and take it out from the etching tank, but also after the circuit board is immersed in the etching solution, the flipping mechanism drives the clamping plate mechanism with two clamping parts to flip 180°, so that the board picking and placing components outside the etching tank can continuously pick and place the circuit board without position adjustment.

[0017] Third, by driving the clamping part to flip 180° through the flipping mechanism, the present invention solves the problem of poor consistency of the etching effects in the upper and lower regions of the circuit board caused by different contact times of the upper and lower parts of the circuit board with the etching solution when the circuit board on the clamping part is put into and taken out of the etching tank. Description of the drawings

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the etching part of the present invention; Figure 3 It is a schematic diagram of the structure of the board placing component of the present invention; Figure 4 Schematic structural diagram of the plate-taking assembly of the present invention; Figure 5 Schematic structural diagram of the central column of the present invention; Figure 6 Schematic structural diagram of the clamping plate mechanism of the present invention; Figure 7 Schematic structural diagram of the airbag of the present invention; Figure 8 Schematic structural diagram of the support arm of the present invention; Figure 9 Partial schematic structural diagram of the rotation drive assembly, lifting drive assembly and flipping drive assembly of the present invention; Figure 10 Schematic structural diagram of the first driving gear and the second driving gear of the present invention.

[0020] The reference numerals in the figure are: 1 - etching tank; 2 - central column; 3 - lifting mechanism; 4 - flipping mechanism; 5 - clamping plate mechanism; 6 - picking and placing mechanism; 7 - suspension; 8 - rotation drive assembly; 9 - eccentric shaft; 10 - first driving gear; 11 - lifting drive assembly; 12 - second driving gear; 13 - flipping drive assembly; 14 - limiting groove; 15 - embedding groove; 16 - air distribution pipe; 17 - female joint; 18 - U-shaped rod; 19 - linkage rod; 20 - pneumatic assembly; 21 - roller; 22 - fitting sleeve; 23 - side frame; 24 - reinforcing rib; 301 - lead screw; 302 - carrier; 303 - first driven gear; 401 - worm; 402 - worm wheel; 403 - spline shaft; 404 - second driven gear; 501 - T-shaped frame; 502 - support arm; 503 - airbag; 504 - male joint; 601 - vertical frame; 602 - clamping cylinder; 603 - clamping plate; 604 - push-pull cylinder; 605 - slider; 606 - bench; 607 - base; 608 - linear guide rail; 609 - finger cylinder. Detailed implementation manners

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0022] As Figures 1 to 10 shown, a PCB circuit board etching device includes an etching tank 1, and also includes a central column 2, a lifting mechanism 3, a flipping mechanism 4, a clamping plate mechanism 5 and a picking and placing mechanism 6. The central column 2 is rotatably arranged in the etching tank 1, the lifting mechanism 3 is arranged on the side of the central column 2, the clamping plate mechanism 5 is connected to the lifting mechanism 3 through the flipping mechanism 4, and the picking and placing mechanism 6 is arranged outside the etching tank 1; The lifting mechanism 3, the flipping mechanism 4 and the clamping plate mechanism 5 constitute the etching part. A plurality of etching parts are arranged at equal intervals along the circumferential direction on the side surface of the central column 2, and the included angle between adjacent etching parts is not less than 90°, that is, at most four etching parts are arranged. Otherwise, there will be an obstacle when the clamping plate mechanisms 5 between adjacent etching parts are flipped; The picking and placing mechanism 6 includes a board picking component and a board placing component distributed in the horizontal direction; The clamping plate mechanism 5 has two clamping parts distributed in the horizontal direction. The flipping mechanism 4 drives the clamping plate mechanism 5 to flip 180°, so as to exchange the positions of the two clamping parts and flip the circuit board clamped by the clamping parts by 180°.

[0023] Specifically, the circuit board to be etched is vertically placed on the board picking component manually or by using an automatic board placing device such as a manipulator. As the central column 2 rotates, when the etching part rotates to the picking and placing position aligned with the picking and placing mechanism 6, the board placing component delivers the circuit board to be etched to the clamping part on the left side. At the same time, the board picking component removes the etched circuit board on the clamping part on the right side. After the picking and placing are completed, the lifting mechanism 3 drives the two clamping parts of the clamping plate mechanism 5 to descend through the flipping mechanism 4 until the circuit board to be etched on the left clamping part is immersed in the etching solution in the etching tank 1. Subsequently, the flipping mechanism 4 drives the clamping plate mechanism 5 to flip 180°, so that the positions of the left and right clamping parts are exchanged, so that when this etching part reaches the picking and placing position again, the board picking component and the board placing component pick and place the circuit board at the same time. Moreover, when the left and right clamps are exchanged in position, the circuit board to be etched also flips 180° in the etching solution, so that the lower part of the circuit board to be etched that first enters the etching solution rises from the etching solution first after etching is completed, so as to ensure that the etching time of each part of the circuit board is the same, thereby ensuring the etching effect.

[0024] In addition, when the central column 2 rotates, a plurality of etching parts rotate in the etching solution to stir the etching solution in the etching tank 1, and the position of the circuit board on the etching part also changes, which is conducive to the uniformity of the concentration of the etching solution in each area of the etching tank 1, and is conducive to the efficient exchange of the etched etching solution in the part in contact with the circuit board and the etching solution in other parts of the etching tank 1, so as to be conducive to the etching effects of multiple circuit boards and the uniform etching effects of each area of the circuit board.

[0025] It should be added that usually, the etching solution in the etching tank 1 is circulated, supplemented and discharged to maintain the overall concentration of the etching solution in the etching tank 1.

[0026] Compared with the existing method of simultaneously putting multiple circuit boards into and taking them out of the etching tank 1, the present invention is provided with multiple etching parts on the side of the central column 2, and the two clamping parts of the clamping plate mechanism 5 of each etching part are alternately positioned through the flipping mechanism 4, so as to facilitate the picking and placing components of the picking and placing mechanism 6 outside the etching tank 1 to pick and place the circuit boards. Moreover, after the multiple etching parts move to the picking and placing positions along with the rotation of the central column 2, the lifting mechanism 3 drives the flipping mechanism 4 and the clamping plate mechanism 5 to lift and lower, cooperating with the picking and placing components to pick and place the circuit boards, realizing the sequential input and output of multiple circuit boards into the etching tank 1, that is, realizing the continuous progress of etching, which is especially conducive to docking with an automated production line. In addition, the flipping mechanism 4 drives the clamping plate mechanism 5 to flip, which also solves the drawback that when the circuit board is put into and taken out of the etching tank 1, the etching effects of the upper and lower parts of the circuit board are inconsistent due to the different contact times of the upper and lower parts of the circuit board with the etching solution.

[0027] In summary, the present invention realizes the agitation of the etching solution in the etching tank 1 and the change of the position of the circuit board during etching by providing multiple etching parts on the side of the intermittently rotating central column 2, ensuring the consistency of the etching effects of multiple circuit boards in the etching tank 1. Moreover, the lifting mechanism 3, the flipping mechanism 4 and the clamping plate mechanism 5 of the etching part can not only sink the circuit board into the etching tank 1 and take it out of the etching tank 1, but also after the circuit board is immersed in the etching solution, the flipping mechanism 4 drives the clamping plate mechanism 5 with two clamping parts to flip 180°, which is not only convenient for the picking and placing components of the picking and placing mechanism 6 to pick and place the circuit board, but also can ensure that the etching times of the upper and lower parts of the circuit board are the same, that is, it is beneficial to the picking and placing of the circuit board and improves the consistency of the etching effects of each area of the circuit board.

[0028] In addition, a suspension 7 is provided at the top of the etching tank 1, and a rotary drive assembly 8 connected to the central column 2 is provided on the suspension 7. The function of the rotary drive assembly 8 is to drive the central column 2 to rotate intermittently according to the above requirements, which is a conventional drive structure and its specific structure will not be elaborated here.

[0029] Among them, the lifting mechanism 3 includes a lead screw 301, a carrier 302 and a first driven gear 303. The lead screw 301 is rotatably arranged on the side of the central column 2, the carrier 302 is arranged on the lead screw 301, and the first driven gear 303 is arranged at the top of the lead screw 301; An eccentric shaft 9 is rotatably arranged on the suspension 7, and the eccentric shaft 9 is located on the side of the suspension 7 close to the picking and placing mechanism 6. A first driving gear 10 is provided on the eccentric shaft 9, and multiple first driven gears 303 are sequentially engaged with the first driving gear 10 along with the rotation of the central column 2. A lifting drive assembly 11 connected to the eccentric shaft 9 is provided on the suspension 7.

[0030] The lifting drive assembly 11 drives the eccentric shaft 9 to rotate, so that the first driven gear 303 meshing with the first driving gear 10 on the eccentric shaft 9 drives the lead screw 301 to reciprocate, so as to realize the lifting of the stage 302, and thus realize the lifting of the flipping mechanism 4 and the clamping plate 603.

[0031] The function of the lifting drive assembly 11 is to drive the first driving gear 10 to rotate, which is a conventional driving method, and its specific structure will not be elaborated here.

[0032] Among them, the flipping mechanism 4 includes a worm 401, a worm wheel 402, a spline shaft 403 and a second driven gear 404. The worm wheel 402 is rotatably arranged on the stage 302 through a worm wheel shaft. The worm 401 is rotatably arranged on the central column 2 and meshes with the worm wheel 402. The spline shaft 403 is rotatably arranged on the central column 2. The worm 401 is provided with a spline hole matching with the spline shaft 403. The second driven gear 404 is arranged at the upper end of the spline shaft 403; A second driving gear 12 and a flipping drive assembly 13 connected to the second driving gear 12 are rotatably arranged on the suspension 7. The second driving gear 12 meshes with the second driven gear 404 when the first driving gear 10 meshes with the first driven gear 303.

[0033] When the stage 302 is lifted or lowered, it drives the worm wheel 402 to move up and down. Due to the self-locking characteristic of the worm wheel 402 - worm 401, the worm wheel 402 will drive the worm 401 to move up and down synchronously, so as to maintain the meshing of the worm wheel 402 and the worm 401. After the circuit board clamped by the clamping plate mechanism 5 is immersed in the etching solution in the etching tank 1, the flipping drive assembly 13 drives the spline shaft 403 to rotate, so as to drive the worm 401 on the spline shaft 403 to drive the worm wheel 402 to rotate 180°, realizing a 180° flip of the circuit board in the etching tank 1.

[0034] The function of the flipping drive assembly 13 is to drive the second driving gear 12 to rotate, which is a conventional driving structure, and its specific structure will not be elaborated here.

[0035] Among them, the clamping plate mechanism 5 includes a T-shaped frame 501, a support arm 502, an air bag 503 and a sub-joint 504. Support arms 502 are arranged on both sides of both ends of the T-shaped frame 501. The tail ends of the support arms 502 are arranged on the T-shaped frame 501. The air bag 503 is arranged on the support arm 502. The sub-joint 504 is arranged on the support arm 502 and communicated with the air bag 503. Two support arms 502, air bags 503 and sub-joints 504 on the same side form a clamping part; Limit grooves 14 are arranged on the relatively close sides of the two support arms 502 on the same side, and the limit grooves 14 penetrate through the front ends of the support arms 502 far from the T-shaped frame 501. Embedding grooves 15 for the air bag 503 to be embedded are arranged on both sides of the limit grooves 14. An air distribution pipe 16 communicating the sub-joint 504 with the air bags 503 on both sides is arranged on the support arm 502; The mother connectors 17 for docking with the sub-connectors 504 are provided on both the board taking assembly and the board placing assembly.

[0036] When the clamping plate mechanism 5 rotates to the board taking and placing position, the four mother connectors 17 on the board taking assembly and the board placing assembly are aligned or docked with the four sub-connectors 504 on the four support arms 502 of the two clamping plate mechanisms 5. Thus, devices such as an air pump connected through the mother connectors 17 can drive the airbag 503 to expand and contract, so as to clamp the circuit board inserted into the two limiting slots 14 on the same side.

[0037] In addition, a number of reinforcing ribs 24 are connected between the two support arms 502 of the clamping part to enhance the structural stability of the two support arms 502 on the same side.

[0038] Wherein, both the board taking assembly and the board placing assembly include a vertical frame 601, a clamping cylinder 602, a clamping plate 603, a push-pull cylinder 604 and a slider 605. Clamping plates 603 are provided at the top and bottom on one side of the vertical frame 601, and the clamping cylinder 602 is arranged on the other side of the vertical frame 601 and connected to the clamping plate 603. The slider 605 is slidably arranged on one side of the vertical frame 601 and is located between the two clamping plates 603. The push-pull cylinder 604 is arranged on the other side of the vertical frame 601 and is connected to the slider 605 through a U-shaped rod 18. The board taking assembly and the board placing assembly share the same push-pull cylinder 604, and the push-pull cylinder 604 is connected to the U-shaped rod 18 through a linkage rod 19. The board placing assembly further includes a finger cylinder 609 provided on the slider 605 for clamping the circuit board. The sub-connector 504 is provided on the vertical frame 601, and a pneumatic assembly 20 communicating with the sub-connector 504 is provided on the vertical frame 601.

[0039] The push-pull cylinder 604 drives the sliders 605 on both sides to reciprocate radially along the central column 2 through the linkage rod 19 and the U-shaped rod 18. Thus, when placing the board, the slider 605 of the board placing assembly pushes the circuit board clamped by the two clamping plates 603 at the top and bottom into the limiting slots 14 on the two support arms 502 on the corresponding side. At the same time, the slider 605 of the board taking assembly approaches the etched circuit board clamped by the two support arms 502 on the other side, and clamps the etched circuit board through the finger cylinder 609. Thus, when the push-pull cylinder 604 drives the two sliders 605 to reset, the slider 605 of the board taking assembly moves the etched circuit board to between the two clamping plates 603 of the board taking assembly by means of the finger cylinder 609.

[0040] It should be noted that the number of finger cylinders 609 can be set to multiple, or replaced by other clamping components with clamping functions. The finger cylinder 609 here is only for easy understanding, and the specific clamping components selected can be chosen and optimized according to actual needs.

[0041] The function of the pneumatic assembly 20 is to pump gas into and out of the airbag 503. It is a conventional pneumatic drive structure, and its specific structure will not be elaborated here.

[0042] Further optimized based on the above embodiment is that a plurality of rollers 21 are rotatably provided at the bottom of the top clamping plate 603 and the top of the bottom clamping plate 603. That is, the two clamping plates 603 are in contact with the circuit board through the plurality of rollers 21, so as to facilitate the slider 605 to push the circuit board to move.

[0043] Among them, the picking and placing mechanism 6 further includes a bench 606, a base 607 and a linear guide rail 608. The base 607 is slidably arranged on the bench 606 through the linear guide rail 608. The vertical frame 601 is arranged on the base 607. The linear guide rail 608 drives the base 607 to approach and move away from the etching tank 1, so that the male connector 17 is docked with the corresponding female connector 504 on one side, and the board picking assembly and the board placing assembly are close to the two clamping parts.

[0044] Further optimized based on the above embodiment is that a fitting sleeve 22 is sleeved on the central column 2. A side frame 23 for installing the lead screw 301 and the spline shaft 403 is provided on the side of the fitting sleeve 22, so as to facilitate the disassembly and assembly of the plurality of etching parts and the central column 2.

[0045] As is known by common technical knowledge, the present invention can be implemented by other embodiments without departing from its spiritual essence or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A PCB circuit board etching device, comprising an etching tank (1), characterized in that, It further includes a central column (2), a lifting mechanism (3), a flipping mechanism (4), a clamping plate mechanism (5) and a picking and placing mechanism (6). The central column (2) is rotatably arranged in the etching tank (1). The lifting mechanism (3) is arranged on the side of the central column (2). The clamping plate mechanism (5) is connected to the lifting mechanism (3) through the flipping mechanism (4). The picking and placing mechanism (6) is arranged outside the etching tank (1). The lifting mechanism (3), the flipping mechanism (4) and the clamping plate mechanism (5) form an etching part. A plurality of etching parts are arranged at equal intervals along the circumferential direction on the side of the central column (2), and the angle between adjacent etching parts is not less than 90°. The picking and placing mechanism (6) includes a board picking component and a board placing component distributed in the horizontal direction. The clamping plate mechanism (5) has two clamping parts distributed in the horizontal direction. The flipping mechanism (4) drives the clamping plate mechanism (5) to flip 180°, so that the positions of the two clamping parts are exchanged, and the circuit board clamped by the clamping parts is flipped 180°.

2. The PCB board etching device according to claim 1, characterized in that, A suspension (7) is arranged on the top of the etching tank (1), and a rotary drive assembly (8) connected to the central column (2) is arranged on the suspension (7).

3. The PCB circuit board etching device according to claim 2, characterized in that, The lifting mechanism (3) includes a lead screw (301), a carrier (302) and a first driven gear (303). The lead screw (301) is rotatably arranged on the side of the central column (2). The carrier (302) is arranged on the lead screw (301). The first driven gear (303) is arranged at the top of the lead screw (301). An eccentric shaft (9) is rotatably arranged on the suspension (7), and the eccentric shaft (9) is located on the side of the suspension (7) close to the picking and placing mechanism (6). A first driving gear (10) is arranged on the eccentric shaft (9). A plurality of the first driven gears (303) are sequentially meshed with the first driving gear (10) as the central column (2) rotates. A lifting drive assembly (11) connected to the eccentric shaft (9) is arranged on the suspension (7).

4. The PCB circuit board etching device according to claim 3, characterized in that, The flipping mechanism (4) includes a worm (401), a worm gear (402), a spline shaft (403) and a second driven gear (404). The worm gear (402) is rotatably arranged on the carrier (302) through a worm gear shaft. The worm (401) is rotatably arranged on the central column (2) and meshes with the worm gear (402). The spline shaft (403) is rotatably arranged on the central column (2). The worm (401) is provided with a spline hole matched with the spline shaft (403). The second driven gear (404) is arranged at the upper end of the spline shaft (403). A second driving gear (12) and a flipping drive assembly (13) connected to the second driving gear (12) are rotatably arranged on the suspension (7). The second driving gear (12) meshes with the second driven gear (404) when the first driving gear (10) meshes with the first driven gear (303).

5. A PCB circuit board etching device according to claim 1, characterized in that, The clamping plate mechanism (5) includes a T-shaped frame (501), a supporting arm (502), an airbag (503), and a sub-joint (504). On both sides of the two ends of the T-shaped frame (501), there are supporting arms (502). The tail ends of the supporting arms (502) are arranged on the T-shaped frame (501). The airbag (503) is arranged on the supporting arm (502). The sub-joint (504) is arranged on the supporting arm (502) and is communicated with the airbag (503). The two supporting arms (502), airbags (503), and sub-joints (504) on the same side form the clamping part; On the closer sides of the two supporting arms (502) on the same side, there are limit grooves (14). The limit grooves (14) penetrate through the front ends of the supporting arms (502) far from the T-shaped frame (501). On both sides of the limit grooves (14), there are embedding grooves (15) for the airbag (503) to be embedded. On the supporting arm (502), there is a cloth air pipe (16) that communicates the sub-joint (504) with the airbags (503) on both sides; On both the plate taking assembly and the plate placing assembly, there is a female joint (17) for docking with the sub-joint (504).

6. The PCB board etching device according to claim 5, characterized in that, Both the plate taking assembly and the plate placing assembly include a vertical frame (601), a clamping cylinder (602), a clamping plate (603), a push-pull cylinder (604), and a slider (605). At the top and bottom on one side of the vertical frame (601), there are clamping plates (603). The clamping cylinder (602) is arranged on the other side of the vertical frame (601) and is connected with the clamping plate (603); The slider (605) is slidably arranged on one side of the vertical frame (601) and is located between the two clamping plates (603). The push-pull cylinder (604) is arranged on the other side of the vertical frame (601) and is connected with the slider (605) through a U-shaped rod (18); The plate taking assembly and the plate placing assembly share the same push-pull cylinder (604). The push-pull cylinder (604) is connected with the U-shaped rod (18) through a linkage rod (19); The plate placing assembly further includes a finger cylinder (609) arranged on the slider (605) for clamping the circuit board; The sub-joint (504) is arranged on the vertical frame (601). On the vertical frame (601), there is a pneumatic assembly (20) communicated with the sub-joint (504).

7. A PCB circuit board etching device according to claim 6, characterized in that, On the bottom of the top clamping plate (603) and the top of the bottom clamping plate (603), a plurality of rollers (21) are rotatably arranged.

8. An etching device for a PCB circuit board according to claim 6, characterized in that, The plate taking and placing mechanism (6) further includes a platform frame (606), a base (607), and a linear guide rail (608). The base (607) is slidably arranged on the platform frame (606) through the linear guide rail (608). The vertical frame (601) is arranged on the base (607). The linear guide rail (608) drives the base (607) to approach and move away from the etching tank (1) so that the female joint (17) is docked with the sub-joint (504) on the corresponding side.

9. A PCB circuit board etching device according to claim 4, wherein, A fitting sleeve (22) is sleeved on the central column (2). On the side surface of the fitting sleeve (22), there is a side frame (23) for installing a lead screw (301) and a spline shaft (403).

10. A PCB circuit board etching device according to claim 5, characterized in that, A plurality of reinforcing ribs (24) are connected between two support arms (502) of the clamping portion.

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