A flip device for PCB board

Abstract

The present invention relates to the technical field of printed circuit board manufacturing, and proposes a flipping device for PCB boards, comprising: a workbench and a first rotating plate and a second rotating plate arranged above the workbench, a plurality of PCB board bodies are arranged between the first rotating plate and the second rotating plate; a position adjustment and flipping mechanism, located on the top of the workbench, for adjusting and flipping the PCB board body; a docking assistant, located between the first rotating plate and the second rotating plate, for assisting the position adjustment and flipping mechanism in flipping the PCB board body. The present invention realizes flipping of the PCB board body by setting the position adjustment and flipping mechanism, and at the same time, the staff can also place a new PCB board body on the first rotating plate, so that the PCB board body can be continuously processed, thereby reducing the time for manual release and calibration and fixation of the PCB board body, thereby improving the efficiency of processing the PCB board body.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit board manufacturing, and in particular to a board turning device for a PCB board. Background Art

[0002] PCB, also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. It has a history of more than 100 years; its design is mainly layout design; the main advantage of using circuit boards is that it greatly reduces wiring and assembly errors, improves the level of automation and production labor rate. Circuit boards need to be processed on both sides and need to be turned over.

[0003] The existing PCB board flipping device generally realizes the grabbing and flipping of the circuit board through the cooperation of many vacuum suction nozzles. In this process, it is necessary to first release the clamping device to fix the PCB board, and then after flipping, it needs to be calibrated and fixed again by the clamping device. This flipping process is time-consuming, thereby reducing the efficiency of PCB board processing. Summary of the invention

[0004] The present invention provides a turning device for a PCB board, which solves the problem of low processing efficiency of the PCB board in the related art.

[0005] The technical solution of the present invention is as follows: a flipping device for a PCB board, comprising: a workbench and a first rotating plate and a second rotating plate arranged above the workbench, a plurality of PCB board bodies are arranged between the first rotating plate and the second rotating plate; a position adjustment and flipping mechanism, located on the top of the workbench, for adjusting and flipping the PCB board bodies; a docking assistant, located between the first rotating plate and the second rotating plate, for assisting the position adjustment and flipping mechanism to flip the PCB board bodies, the docking assistant comprising a docking shell arranged between the second rotating plate and the first rotating plate, an auxiliary support member for supporting the PCB board bodies for position change is arranged on the inner side of the docking shell; a clamping mechanism, located on the outer side of the docking shell, for clamping and fixing the PCB board bodies.

[0006] As a further solution of the present invention: the clamping mechanism includes a fixing seat fixedly connected to both sides of the docking shell, wherein a second driving motor is installed on one side of one of the fixing seats, an output end of the second driving motor is connected to a second bidirectional threaded screw, and one end of the second bidirectional threaded screw penetrates through the inner side of the fixing seat and is rotatably connected to the fixing seat, an outer wall of the second bidirectional threaded screw is threadedly connected to a sliding block, and one end of the sliding block is fixedly connected to a clamping plate.

[0007] As a further solution of the present invention: the outer wall of the second bidirectional threaded screw is provided with a first positive thread and a first negative thread, the sliding block and the clamping plate are provided with two, the inner side of the fixed seat is fixedly connected with a rectangular rod, the two fixed seats are both slidably connected to the outer wall of the rectangular rod, and the two fixed seats are respectively threadedly connected to the outer walls of the first positive thread and the first negative thread.

[0008] As a further solution of the present invention: the positioning and flipping mechanism includes two groups of sliding seats slidably connected to the top of the workbench, each group of sliding seats is provided with two, and the two sliding seats are respectively located on one side of the first rotating plate or the second rotating plate, a first driving motor is installed on the inner side of the workbench, the output end of the first driving motor is connected to a first bidirectional threaded screw, and one end of the first bidirectional threaded screw passes through the inner side of the workbench and is rotatably connected to the workbench, the outer wall of the first bidirectional threaded screw is provided with a second positive thread and a second reverse thread, the two sliding seats in each group of sliding seats are respectively threadedly connected to the second positive thread and the second reverse thread outer walls, and the top of the workbench is provided with a limiting sliding groove matching the sliding seat.

[0009] As a further solution of the present invention: the positioning and flipping mechanism also includes a first spur rack fixedly connected to the top of the workbench, two sides of the first rotating plate are fixedly connected with a rotating shaft, and one end of the rotating shaft passes through the outside of the sliding seat and is fixedly connected with a worm gear, one side of the sliding seat is rotatably connected with a worm meshing with the worm gear, and the end of the worm gear is fixedly connected with a first spur gear meshing with the first spur rack.

[0010] As a further solution of the present invention: the docking assistant includes a docking seat fixedly connected to both sides of the docking shell, the inner sides of the second rotating plate and the first rotating plate are provided with docking grooves matching the docking seat, the inner side of the docking seat is slidably connected with a latch, a connecting spring is installed between the inner side of the latch and the docking seat, the inner side of the second rotating plate is provided with a latch hole matching the latch, and the top of the latch is fixedly connected with a first spherical rod.

[0011] As a further solution of the present invention: the docking assistant also includes an electric push rod installed on the outer wall of the docking shell, the output end of the electric push rod is connected to a vertical plate, the bottom of the vertical plate is fixedly connected to a power plate, and both ends of the power plate are fixedly connected to triangular blocks.

[0012] As a further scheme of the present invention: the auxiliary support member includes two groups of fixed shells fixedly connected to both sides of the docking shell, each group of the fixed shells is provided with two, and a support plate is provided between the two fixed shells, and the outer walls of the two sides of the support plate are fixedly connected with a rotating shaft, and one end of the rotating shaft passes through the inner side of the fixed shell and is rotatably connected to the fixed shell, and the outer wall of the rotating shaft is fixedly connected with the second spur gear, the inner side of the fixed shell is slidably connected with a second spur rack meshing with the second spur gear, one end of the second spur rack is fixedly connected with a movable block, and one end of the movable block passes through the outside of the fixed shell and is fixedly connected with an auxiliary spring, one end of the auxiliary spring is fixedly connected to the fixed shell, one end of the movable block is fixedly connected to a second spherical rod, the outer walls of the two sides of the vertical plate are fixedly connected with a connecting rod, and one end of the connecting rod is fixedly connected with a trapezoidal block.

[0013] The working principle and beneficial effects of the present invention are:

[0014] 1. By setting a position adjustment and flipping mechanism, the output end of the first driving motor drives the first bidirectional threaded screw to rotate, so that the two sliding seats move toward each other, so that the first rotating plate and the second rotating plate are close to each other, and when the first spur gear contacts the first spur rack, the worm is driven to rotate, and then the worm gear is driven to drive the rotating shaft to rotate, so that the first rotating plate and the second rotating plate are rotated toward each other, so that the PCB board body processed on the first rotating plate can be transferred to the second rotating plate, and then the first driving motor drives the first bidirectional threaded screw to rotate in the opposite direction, so that the first rotating plate and the second rotating plate are driven to move away from each other, so that the second rotating plate can drive the PCB board body to rotate after resetting, thereby realizing the flipping of the PCB board body, and at the same time, the staff can also place a new PCB board body on the first rotating plate, so that the PCB board body can be continuously processed, thereby reducing the time for manual release and calibration and fixation of the PCB board body, thereby improving the processing efficiency of the PCB board body;

[0015] 2. By setting a docking assistant, when the first rotating plate and the second rotating plate are rotated ninety degrees and continue to approach each other, the first spur rack and the first spur gear are in a separated state, and when the first rotating plate and the second rotating plate are in a vertical state and continue to approach each other, the docking seat at one end of the docking shell connected to the first rotating plate is inserted into the docking groove on the inner side of the second rotating plate. When the first rotating plate and the second rotating plate move to the maximum position, the latch pin is aligned with the latch pin hole, and the electric push rod is started. The output end of the electric push rod drives the vertical plate to drive the power plate to move toward the second rotating plate, so that the triangular block at one end of the power plate is inserted into the inside of the docking seat docked with the second rotating plate. When one side of the triangular block contacts the first spherical rod, the first spherical rod is pushed to drive The latch moves into the latch hole, and at the same time, the other triangular block gradually separates from the first spherical rod on the inner side of the first rotating plate, so that the other latch gradually moves out of the latch hole on the inner side of the first rotating plate. When the electric push rod stops moving, one latch is inserted into the inner side of the second rotating plate to fix the docking seat and the second rotating plate, and the other latch moves out of the latch hole on the inner side of the first rotating plate, thereby releasing the fixation of the docking shell and the first rotating plate. Therefore, there is no need for the staff to repeatedly contact and fix the PCB board body, and the PCB board body can be alternately changed to the flip position, and then the PCB board body can be quickly flipped in cooperation with the position adjustment and flipping mechanism, thereby further improving the efficiency of processing the PCB board body.

[0016] When the second spherical rod is in contact with the second spherical rod, the second spherical rod is pushed to drive the second spur rack to move in the direction of the second spur gear, thereby driving the second spur gear to drive the support plate to rotate in the opposite direction to the PCB body through the rotating shaft. When the inclined surface at one end of the trapezoidal block is separated from the second spherical rod and the second spherical rod is against a plane on one side of the trapezoidal block, the support plate close to the position of the second rotating plate is attached to the processed outer wall of the PCB body, and the other support plate is rotated away from the PCB body under the reset action of the auxiliary spring, so that the support plate close to the position of the first rotating plate no longer blocks the PCB body, thereby realizing alternating support of the PCB body, thereby ensuring that the processed side of the PCB body will not be blocked, thereby improving the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the sliding seat structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the first rotating plate and the second rotating plate of the present invention being connected;

[0021] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 It is a schematic diagram of the docking of the docking seat and the docking groove of the present invention;

[0023] Figure 6 It is a schematic diagram of the docking shell structure of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0025] Figure 8 It is a schematic diagram of the inner structure of the docking shell of the present invention;

[0026] Fig. 9 For the present invention Figure 8 Enlarged view of point C in the middle.

[0027] In the figure: 1, workbench; 2, first drive motor; 3, first bidirectional threaded screw; 4, sliding seat; 5, first straight rack; 6, first rotating plate; 7, second rotating plate; 8, rotating shaft; 9, worm gear; 10, worm; 11, first straight gear; 12, PCB board body; 13, docking shell; 14, docking seat; 15, latch; 16, electric push rod; 17, fixed seat; 18, second drive motor; 19, second bidirectional threaded screw rod; 20, slider; 21, rectangular rod; 22, triangular block; 23, first spherical rod; 24, connecting spring; 25, power plate; 26, second spur gear; 27, swivel; 28, second spur rack; 29, second spherical rod; 30, support plate; 31, docking groove; 32, pin hole; 33, clamping plate; 34, vertical plate; 35, fixed shell; 36, connecting rod; 37, trapezoidal block; 38, movable block; 39, auxiliary spring. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0029] See also Figures 1 to 9The present embodiment provides a flipping device for a PCB board, comprising: a workbench 1 and a first rotating plate 6 and a second rotating plate 7 arranged above the workbench 1, a plurality of PCB board bodies 12 are arranged between the first rotating plate 6 and the second rotating plate 7; a position adjustment and flipping mechanism, located at the top of the workbench 1, for adjusting and flipping the PCB board body 12, the position adjustment and flipping mechanism comprising two groups of sliding seats 4 slidably connected to the top of the workbench 1, each group of sliding seats 4 is provided with two, and the two sliding seats 4 are respectively located on one side of the first rotating plate 6 or the second rotating plate 7, a first driving motor 2 is installed on the inner side of the workbench 1, the output end of the first driving motor 2 is connected to a first bidirectional threaded screw 3, and the first bidirectional threaded screw 3 One end of the first two-way threaded screw 3 passes through the inner side of the workbench 1 and is rotatably connected to the workbench 1. The outer wall of the first two-way threaded screw 3 is provided with a second positive thread and a second reverse thread. The two sliding seats 4 in each group of sliding seats 4 are respectively threadedly connected to the second positive thread and the second reverse thread outer wall. The top of the workbench 1 is provided with a limiting slide groove matching the sliding seat 4. The position adjustment and flipping mechanism also includes a first spur rack 5 fixedly connected to the top of the workbench 1. The two sides of the first rotating plate 6 are fixedly connected with a rotating shaft 8, and one end of the rotating shaft 8 passes through the outside of the sliding seat 4 and is fixedly connected with a worm gear 9. One side of the sliding seat 4 is rotatably connected with a worm 10 meshing with the worm gear 9, and the end of the worm 10 is fixedly connected with a first spur gear 11 meshing with the first spur rack 5.

[0030] First, when one side of the PCB board body 12 is processed on the first rotating plate 6, when the PCB board body 12 needs to be turned over, the two first driving motors 2 can be started, and the output end of the first driving motor 2 drives the first bidirectional threaded screw 3 to rotate, so that the two sliding seats 4 move toward each other, so that the first rotating plate 6 and the second rotating plate 7 are close to each other, and when the first spur gear 11 contacts the first spur rack 5, the worm 10 is driven to rotate, and then the worm wheel 9 is driven to drive the rotating shaft 8 to rotate, so that the first rotating plate 6 and the second rotating plate 7 are rotated toward each other, so that the PCB board body 12 processed on the first rotating plate 6 It can be converted to the second rotating plate 7, and then the first bidirectional threaded screw 3 is driven by the first driving motor 2 to rotate in the opposite direction, so as to drive the first rotating plate 6 and the second rotating plate 7 to move away from each other, so that the second rotating plate 7 can drive the PCB board body 12 to rotate after being reset, thereby realizing the flipping of the PCB board body 12. At the same time, the staff can also place a new PCB board body 12 on the first rotating plate 6, so that the PCB board body 12 can be continuously processed, thereby reducing the time for manual release and calibration and fixation of the PCB board body 12, thereby improving the efficiency of processing the PCB board body 12. Example 2

[0031] The docking assistant is located between the first rotating plate 6 and the second rotating plate 7, and is used to assist the adjustment and flipping mechanism to flip the PCB board body 12. The docking assistant includes a docking shell 13 arranged between the second rotating plate 7 and the first rotating plate 6, and the docking assistant includes a docking seat 14 fixedly connected to both sides of the docking shell 13. The inner sides of the second rotating plate 7 and the first rotating plate 6 are both provided with docking grooves 31 matching the docking seat 14, and the inner side of the docking seat 14 is slidably connected with a latch 15, and a connecting spring 24 is installed between the inner side of the latch 15 and the docking seat 14. The inner side of the second rotating plate 7 is provided with a latch hole 32 matching the latch 15, and the top of the latch 15 is fixedly connected with a first spherical rod 23. The docking assistant also includes an electric push rod 16 installed on the outer wall of the docking shell 13, and the output end of the electric push rod 16 is connected with a vertical plate 34, and the bottom of the vertical plate 34 is fixedly connected with a power plate 25, and both ends of the power plate 25 are fixedly connected with triangular blocks 22;

[0032] When the first rotating plate 6 and the second rotating plate 7 are rotated ninety degrees and continue to approach each other, the first spur rack 5 and the first spur gear 11 are in a separated state. When the first rotating plate 6 and the second rotating plate 7 are in a vertical state and continue to approach each other, the docking seat 14 at one end of the docking shell 13 connected to the first rotating plate 6 is inserted into the docking groove 31 on the inner side of the second rotating plate 7. When the first rotating plate 6 and the second rotating plate 7 move to the maximum position, the latch 15 is aligned with the latch hole 32, and the electric push rod 16 is started. The output end of the electric push rod 16 drives the vertical plate 34 to drive the power plate 25 to move toward the second rotating plate 7, so that the triangular block 22 at one end of the power plate 25 is inserted into the inside of the docking seat 14 docking with the second rotating plate 7. When one side of the triangular block 22 contacts the first spherical rod 23, the first spherical rod 23 is pushed to drive the latch 15 When the electric push rod 16 stops moving, one latch 15 is inserted into the inner side of the second rotating plate 7 to fix the docking seat 14 and the second rotating plate 7, and the other latch 15 is moved out of the latch hole 32 on the inner side of the first rotating plate 6, thereby releasing the fixation of the docking shell 13 and the first rotating plate 6. In this way, there is no need for the staff to repeatedly contact and fix the PCB board body 12, and the PCB board body 12 can be alternately changed to the flip position, and then the PCB board body 12 can be quickly flipped in cooperation with the position adjustment and flipping mechanism, thereby further improving the processing efficiency of the PCB board body 12.

[0033] At the same time, after the first rotating plate 6 is reset, a new set of docking shells 13 and PCB board body 12 can be installed on the first rotating plate 6 to process the PCB board body 12 again, and the staff can have enough time to remove the processed PCB board body 12 together with the docking shell 13 on the second rotating plate 7. Example 3

[0034] The clamping mechanism is located on the outside of the docking shell 13 and is used to clamp and fix the PCB board body 12. The clamping mechanism includes a fixing seat 17 fixedly connected to both sides of the docking shell 13, one side of one of the fixing seats 17 is installed with a second drive motor 18, the output end of the second drive motor 18 is connected with a second bidirectional threaded screw rod 19, and one end of the second bidirectional threaded screw rod 19 passes through the inner side of the fixing seat 17 and is rotatably connected to the fixing seat 17, the outer wall of the second bidirectional threaded screw rod 19 is threadedly connected with a slider 20, one end of the slider 20 is fixedly connected with a clamping plate 33, the outer wall of the second bidirectional threaded screw rod 19 is provided with a first positive thread and a first reverse thread, two sliders 20 and the clamping plate 33 are provided, a rectangular rod 21 is fixedly connected to the inner side of the fixing seat 17, the two fixing seats 17 are both slidably connected to the outer wall of the rectangular rod 21, the two fixing seats 17 are respectively threadedly connected to the outer walls of the first positive thread and the first reverse thread, and the inner side of the docking shell 13 is provided with a The auxiliary support member for the PCB board body 12 to perform transposition support includes two groups of fixed shells 35 fixedly connected to both sides of the docking shell 13, each group of fixed shells 35 is provided with two, and a support plate 30 is provided between the two fixed shells 35, and the outer walls of both sides of the support plate 30 are fixedly connected with a rotating shaft 27, and one end of the rotating shaft 27 penetrates through the inner side of the fixed shell 35 and is rotatably connected to the fixed shell 35, and the outer wall of the rotating shaft 27 is fixedly connected with a second spur gear 26, and the inner side of the fixed shell 35 is slidably connected with a second spur rack 28 meshing with the second spur gear 26, and one end of the second spur rack 28 is fixedly connected with a movable block 38, and one end of the movable block 38 penetrates through the outside of the fixed shell 35 and is fixedly connected with an auxiliary spring 39, one end of the auxiliary spring 39 is fixedly connected to the fixed shell 35, and one end of the movable block 38 is fixedly connected with a second spherical rod 29, and the outer walls of both sides of the vertical plate 34 are fixedly connected with a connecting rod 36, and one end of the connecting rod 36 is fixedly connected with a trapezoidal block 37;

[0035] When the staff needs to fix the PCB body 12, the PCB body 12 can be placed on the support plate 30 first, and then the second drive motor 18 can be started. The output end of the second drive motor 18 drives the second bidirectional threaded screw 19 to rotate, thereby driving the two sliders 20 to drive a clamping plate 33 to approach the PCB body 12, thereby fixing the PCB body 12;

[0036] When the electric push rod 16 drives the vertical plate 34 to move toward the second rotating plate 7, it drives the two connecting rods 36 to move synchronously, so that the trapezoidal block 37 moves from one end of the second spherical rod 29 to the other second spherical rod 29. When the trapezoidal block 37 contacts the other second spherical rod 29, it pushes the other second spherical rod 29 to drive the second spur rack 28 to move toward the second spur gear 26, thereby driving the second spur gear 26 to drive the support plate 30 to rotate in the opposite direction toward the PCB board body 12 through the rotating shaft 27. When the inclined surface of one end of the trapezoidal block 37 contacts the second spherical rod 29, the second spur gear 26 drives the support plate 30 to rotate in the opposite direction toward the PCB board body 12. 9 is separated, and the second spherical rod 29 is against the plane of one side of the trapezoidal block 37, the support plate 30 close to the second rotating plate 7 is fitted on the processed outer wall of the PCB board body 12, and the other support plate 30 is rotated away from the PCB board body 12 under the reset action of the auxiliary spring 39, so that the support plate 30 close to the first rotating plate 6 no longer blocks the PCB board body 12, thereby realizing alternate support of the PCB board body 12, thereby ensuring that the processed side of the PCB board body 12 will not be blocked, thereby improving the overall practicality of the device.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A turning device for a PCB board, characterized in that: include: A workbench (1), and a first rotating plate (6) and a second rotating plate (7) arranged above the workbench (1), wherein a plurality of PCB board bodies (12) are arranged between the first rotating plate (6) and the second rotating plate (7); A position adjustment and flipping mechanism, located on the top of the workbench (1), and used to adjust the position and flip the PCB board body (12); a docking assistant, located between the first rotating plate (6) and the second rotating plate (7), and used to assist the position adjustment and flipping mechanism in flipping the PCB board body (12); the docking assistant comprises a docking shell (13) arranged between the second rotating plate (7) and the first rotating plate (6); an auxiliary support member for supporting the PCB board body (12) for position change is arranged on the inner side of the docking shell (13); A clamping mechanism, located outside the docking shell (13), and used for clamping and fixing the PCB board body (12); The docking assistant comprises a docking seat (14) fixedly connected to both sides of the docking shell (13); the inner sides of the second rotating plate (7) and the first rotating plate (6) are both provided with docking grooves (31) matching the docking seat (14); the inner side of the docking seat (14) is slidably connected with a latch (15); a connecting spring (24) is installed between the inner side of the latch (15) and the docking seat (14); the inner side of the second rotating plate (7) is provided with a latch hole (32) matching the latch (15); and the top of the latch (15) is fixedly connected with a first spherical rod (23); The docking assist device further comprises an electric push rod (16) mounted on the outer wall of the docking shell (13), the output end of the electric push rod (16) being connected to a vertical plate (34), the bottom of the vertical plate (34) being fixedly connected to a power plate (25), and both ends of the power plate (25) being fixedly connected to triangular blocks (22).

2. A turning device for a PCB board according to claim 1, characterized in that: The clamping mechanism comprises a fixing seat (17) fixedly connected to two sides of the docking shell (13), wherein a second drive motor (18) is installed on one side of one of the fixing seats (17), an output end of the second drive motor (18) is connected to a second bidirectional threaded screw (19), one end of the second bidirectional threaded screw (19) passes through the inner side of the fixing seat (17) and is rotatably connected to the fixing seat (17), an outer wall of the second bidirectional threaded screw (19) is threadedly connected to a slider (20), and one end of the slider (20) is fixedly connected to a clamping plate (33).

3. A turning device for a PCB board according to claim 2, characterized in that: The outer wall of the second bidirectional threaded screw (19) is provided with a first positive thread and a first negative thread, the sliding block (20) and the clamping plate (33) are provided with two, the inner side of the fixing seat (17) is fixedly connected with a rectangular rod (21), the two fixing seats (17) are both slidably connected to the outer wall of the rectangular rod (21), and the two fixing seats (17) are respectively threadedly connected to the outer walls of the first positive thread and the first negative thread.

4. The turning device for a PCB board according to claim 1, characterized in that: The positioning and flipping mechanism comprises two groups of sliding seats (4) slidably connected to the top of the workbench (1), each group of the sliding seats (4) is provided with two, and the two sliding seats (4) are respectively located on one side of the first rotating plate (6) or the second rotating plate (7), a first driving motor (2) is installed on the inner side of the workbench (1), the output end of the first driving motor (2) is connected to a first bidirectional threaded screw (3), and one end of the first bidirectional threaded screw (3) passes through the inner side of the workbench (1) and is rotatably connected to the workbench (1), the outer wall of the first bidirectional threaded screw (3) is provided with a second positive thread and a second negative thread, the two sliding seats (4) in each group of the sliding seats (4) are respectively threadedly connected to the outer wall of the second positive thread and the second negative thread, and a limiting sliding groove matching the sliding seat (4) is opened on the top of the workbench (1).

5. A turning device for a PCB board according to claim 4, characterized in that: The positioning and turning mechanism further comprises a first spur rack (5) fixedly connected to the top of the workbench (1); a rotating shaft (8) is fixedly connected to both sides of the first rotating plate (6); one end of the rotating shaft (8) passes through the outside of the sliding seat (4) and is fixedly connected to a worm gear (9); one side of the sliding seat (4) is rotatably connected to a worm (10) meshing with the worm gear (9); and an end of the worm (10) is fixedly connected to a first spur gear (11) meshing with the first spur rack (5).

6. A turning device for a PCB board according to claim 5, characterized in that: The auxiliary support member comprises two groups of fixed shells (35) fixedly connected to both sides of the docking shell (13), each group of the fixed shells (35) being provided with two, a support plate (30) being provided between the two fixed shells (35), the outer walls on both sides of the support plate (30) being fixedly connected with a swivel shaft (27), one end of the swivel shaft (27) passing through the inner side of the fixed shell (35) and being rotatably connected to the fixed shell (35), the outer wall of the swivel shaft (27) being fixedly connected with a second spur gear (26), the inner side of the fixed shell (35) being slidably connected with a swivel shaft (27) connected to the first swivel gear (26), and the second swivel gear (26) being fixedly connected with the second swivel gear (26) and the second swivel gear (26) being slidably connected to the first swivel gear (26). A second spur rack (28) is meshed with two spur gears (26); one end of the second spur rack (28) is fixedly connected to a movable block (38); one end of the movable block (38) passes through the outside of the fixed shell (35) and is fixedly connected to an auxiliary spring (39); one end of the auxiliary spring (39) is fixedly connected to the fixed shell (35); one end of the movable block (38) is fixedly connected to a second spherical rod (29); and connecting rods (36) are fixedly connected to the outer walls of both sides of the vertical plate (34); one end of the connecting rod (36) is fixedly connected to a trapezoidal block (37).

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