Circuit board flipping device, control method and automated production line

Abstract

The present invention relates to the technical field of circuit board production equipment, and in particular to a circuit board flipping device, a control method and an automated production line, wherein the circuit board flipping device includes a machine base, a rotating bracket and two conveying mechanisms, the machine base is provided with two opposite vertical plates, and the upper ends of the vertical plates are provided with bearing seats; the two ends of the rotating bracket are respectively provided with support shafts, the support shafts are supported on the bearing seats, and the rotating bracket is connected to a first driving member; the two conveying mechanisms are symmetrically distributed at the two ends of the rotating bracket, and the conveying mechanism includes a shell, a panel, two adjustable roller groups and a plurality of conveying roller groups, the two adjustable roller groups and the plurality of conveying roller groups are all installed on the panel and arranged in a row along the length direction of the panel. The two conveying mechanisms are driven to rotate 180° by the rotating bracket to realize the flipping of the circuit board and improve the production efficiency. The two adjustable rollers of the adjustable roller group can clamp the circuit board, and prevent the circuit board from shifting and falling off during the flipping process, thereby improving reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board production equipment, and in particular to a circuit board turning device, a control method and an automated production line. Background Art

[0002] In the related art, with the rapid development of the printed circuit board (PCB) manufacturing industry, the production speed and precision requirements of printed circuit boards are getting higher and higher. The production process of some circuit boards includes the plugging process on both sides and the silk screen process on both sides. It is necessary to manually or mechanically flip the circuit board many times and reposition the circuit board, which is time-consuming and has low production efficiency, and needs to be improved. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a circuit board flipping device, which can realize the flipping of the circuit board, cooperate with a via plugging machine and a screen printing machine to form an automated production line to improve production efficiency.

[0004] The present invention also provides a control method for the circuit board flipping device.

[0005] The present invention also proposes an automated production line using the circuit board turning device.

[0006] According to the first aspect of the present invention, the circuit board flipping device comprises a machine base, a rotating bracket and two conveying mechanisms, the machine base is provided with two opposite vertical plates, and the upper ends of the vertical plates are provided with bearing seats; the two ends of the rotating bracket are respectively provided with support shafts, and the support shafts are supported on the bearing seats, and the rotating bracket is connected to a first driving member; the two conveying mechanisms are symmetrically distributed at the two ends of the rotating bracket, and the conveying mechanism comprises a shell, a panel, two adjustable roller groups and a plurality of conveying roller groups, the interior of the shell forms an installation cavity with an opening, the panel is connected to the side of the shell and covers the opening of the installation cavity, the two adjustable roller groups and the plurality of conveying roller groups are all installed on the panel, and are arranged along the length direction of the panel. In a row, two adjustable roller groups are located at both ends of the plurality of conveying roller groups; wherein, the adjustable roller group includes two adjustable rollers, the adjustable rollers are connected with an adjustable shaft, the panel is provided with an adjustable seat, the adjustable shaft is installed on the adjustable seat through a self-aligning bearing, the adjustable seat is connected with a second driving member, the second driving member is provided with a guide plate, the guide plate is provided with two guide holes, each of the guide holes passes through one of the adjustable shafts, the end of the adjustable shaft away from the adjustable roller is provided with a tapered section, the side wall of the guide hole is provided with a guide surface, the guide surface is located on the inner side of the two guide holes close to each other, and the guide surface abuts the tapered section; the conveying roller group includes two conveying rollers, and the conveying rollers are connected with a third driving member.

[0007] According to the circuit board flipping device of the first aspect of the present invention, there are at least the following beneficial effects: the circuit board flipping device is capable of conveying circuit boards by arranging two adjustable roller groups and multiple conveying roller groups of two conveying mechanisms in a row, and the two conveying mechanisms are driven to rotate 180° by a rotating bracket to realize the flipping of the circuit board, and then handed over to other equipment, and applied to an automated production line to replace manual flipping and positioning of the circuit board, thereby improving production efficiency. In order to fix the circuit board during the flipping process, the two adjustable rollers of the adjustable roller group are supported by self-aligning bearings, and the angle can be adjusted. The guide plate is driven to move by the second driving member, and the guide surface of the guide plate cooperates with the tapered section, so that the two adjustable rollers of the adjustable roller group move toward each other to clamp the circuit board, and the circuit board is prevented from shifting and falling off during the flipping process, thereby improving reliability.

[0008] According to some embodiments of the first aspect of the present invention, the second driving member includes an electric push rod, and the guide plate is fixedly connected to the end of the output rod of the electric push rod.

[0009] According to some embodiments of the first aspect of the present invention, the panel is provided with a circular hole for the adjustable shaft to pass through, both ends of the side walls of the circular hole are provided with chamfers, and the diameter of the circular hole is larger than the diameter of the adjustable shaft.

[0010] According to some embodiments of the first aspect of the present invention, the distance between the two conveyor rollers of each conveyor roller group is greater than the thickness of the circuit board, and the third driving member includes a motor and a synchronous belt, the motor is used to drive the synchronous belt, and the rotating shaft of the conveyor roller is connected to a gear, and the gear is engaged with the synchronous belt.

[0011] According to some embodiments of the first aspect of the present invention, the base is connected to a brake mechanism, which includes a brake sleeve and a brake pressure plate, the brake sleeve is annular and is sleeved on the outside of the support shaft, the brake sleeve is provided with a radially arranged slide groove, the brake pressure plate is slidably arranged in the slide groove, the side of the brake pressure plate facing the support shaft is provided to match the arc surface of the support shaft, the side of the brake pressure plate away from the support shaft is connected to a fourth driving member, the base is provided with an angle detection component to detect the rotation angle of the support shaft, the base has a controller, and the angle detection component and the fourth driving member are electrically connected to the controller.

[0012] According to some embodiments of the first aspect of the present invention, the fourth driving member is an electromagnet, the outer wall of the brake sleeve is provided with a magnetic attraction portion, and the electromagnet and the magnetic attraction portion are arranged adjacent to each other.

[0013] According to the control method of the second aspect of the present invention, which is applied to the circuit board flipping device described in the first aspect, the control method includes: S100, when the angle detection component detects that the support shaft rotates to a set angle, the angle detection component sends a signal to the controller; S200, the controller receives the signal of the angle detection component and controls the electromagnet to start; S300, under the action of the magnetic attraction force, the electromagnet moves toward the magnetic attraction part, drives the brake pressure plate to move toward the support shaft and contact the support shaft, and causes the support shaft to stop rotating through friction.

[0014] According to some embodiments of the second aspect of the present invention, in the step S300, the magnetic attraction force generated by the electromagnet includes a first increasing interval, a first decreasing interval, a second increasing interval, a first decreasing interval and an interval for maintaining a stable pressure.

[0015] According to the automated production line of the third embodiment of the present invention, it includes a loading device, a first plugging machine, the circuit board flipping device described in the first embodiment, a second plugging machine, a first screen printer, the circuit board flipping device described in the first embodiment, and a second screen printer arranged in sequence.

[0016] According to some embodiments of the third aspect of the present invention, opposite sides of the second plugging machine and the circuit board turning device are provided with through-beam photoelectric sensors, the second plugging machine is provided with a second conveyor belt, the second conveyor belt is connected to a second lifting seat, and the second lifting seat is electrically connected to the through-beam photoelectric sensor; opposite sides of the second screen printing machine and the circuit board turning device are provided with through-beam photoelectric sensors, the second screen printing machine is provided with a third conveyor belt, the third conveyor belt is connected to a third lifting seat, and the third lifting seat is electrically connected to the through-beam photoelectric sensor.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of an automated production line according to an embodiment of the third aspect of the present invention;

[0020] Figure 2 It is a schematic structural diagram of a circuit board turning device according to an embodiment of the first aspect of the present invention;

[0021] Figure 3 It is an exploded schematic diagram of a circuit board turning device according to an embodiment of the first aspect of the present invention;

[0022] Figure 4 A cross-sectional view of a conveying mechanism in an embodiment of the first aspect of the present invention;

[0023] Figure 5 It is an exploded schematic diagram of the conveying mechanism in the embodiment of the first aspect of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a guide plate in an embodiment of the first aspect of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the brake mechanism in the embodiment of the first aspect of the present invention;

[0026] Figure 8 It is a cross-sectional view of the brake mechanism in the embodiment of the first aspect of the present invention.

[0027] The figures are as follows:

[0028] Machine base 100, vertical plate 110, bearing seat 120;

[0029] Rotating bracket 200, support shaft 210;

[0030] Conveying mechanism 300, housing 310, mounting cavity 311, panel 320, adjustable seat 321, self-aligning bearing 322, adjustable roller group 330, adjustable roller 331, adjustable shaft 332, tapered section 3321, second driving member 333, guide plate 334, guide hole 3341, guide surface 3342, conveying roller group 340, conveying roller 341;

[0031] Braking mechanism 400, brake sleeve 410, slide groove 411, brake pressure plate 420, fourth driving member 430;

[0032] The feeding device 510 , the first plugging machine 520 , the second plugging machine 530 , the second conveyor belt 531 , the first screen printing machine 540 , the second screen printing machine 550 , and the third conveyor belt 551 . DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 2 to 5The first embodiment of the present invention proposes a circuit board turning device, including a machine base 100, a rotating bracket 200 and two conveying mechanisms 300. The machine base 100 is the basis of the circuit board turning device, and is usually fixed on the ground of the factory or other equipment. A vertical plate 110 is respectively arranged at both ends of the machine base 100, and the two vertical plates 110 are arranged oppositely. A bearing seat 120 is arranged at the upper end of the vertical plate 110, and a support shaft 210 is respectively arranged at both ends of the rotating bracket 200. The support shaft 210 is supported on the bearing seat 120 through a bearing, and various types of bearings such as ball bearings and roller bearings can be selected. The rotating bracket 200 is connected to a first driving member, and the function of the first driving member is to drive the rotating bracket 200 to rotate. The first driving member can be installed inside the bearing seat 120. For example, the first driving member adopts a motor and a reduction gearbox, and the rotating shaft of the motor is connected to the support shaft 210 through the reduction gearbox; the first driving member can also adopt a servo motor, which is connected to the support shaft 210 through a one-way clutch.

[0038] The two conveying mechanisms 300 are both mounted on the rotating bracket 200 and are symmetrically distributed at both ends of the rotating bracket 200, corresponding to the width of the circuit board. The conveying mechanism 300 includes a shell 310, a panel 320, two adjustable roller groups 330 and a plurality of conveying roller groups 340. The shell 310 has an opening formed inside thereof. The panel 320 is connected to the side of the shell 310 and covers the opening of the mounting cavity 311. The two adjustable roller groups 330 and the plurality of conveying roller groups 340 are both mounted on the panel 320 and are arranged in a row along the length direction of the panel 320 to match the shape of the circuit board. The two adjustable roller groups 330 are located at both ends of the plurality of conveying roller groups 340. The plurality of conveying roller groups 340 are used to drive the circuit board to move. The adjustable roller group 330 includes two adjustable rollers 331. The adjustable rollers 331 are connected to the sides of the shell 310. An adjustable shaft 332 is connected, and the panel 320 is provided with an adjustable seat 321. The adjustable shaft 332 is installed on the adjustable seat 321 through a self-aligning bearing 322. A second driving member 333 is connected to the adjustable seat 321. The second driving member 333 is provided with a guide plate 334. The guide plate 334 is provided with two guide holes 3341. Each guide hole 3341 passes through an adjustable shaft 332. The end of the adjustable shaft 332 away from the adjustable roller 331 is provided with a tapered section 3321. The side wall of the guide hole 3341 is provided with a guide surface 3342. The guide surface 3342 is located on the inner side where the two guide holes 3341 are close to each other, and the guide surface 3342 abuts against the tapered section 3321. The conveying roller group 340 includes two conveying rollers 341. The conveying roller 341 is connected to a third driving member. The conveying roller 341 is driven to rotate by the third driving member, thereby driving the circuit board to move and realize conveying.

[0039] It can be understood that the area of ​​the guide hole 3341 of the guide plate 334 is larger than the cross section of the adjustable shaft 332, so that the adjustable shaft 332 can swing around the self-aligning bearing 322. Figure 6 As shown, the guide surface 3342 can be a plane, which abuts against the tapered section 3321. When the guide plate 334 moves along the axial direction of the adjustable shaft 332, the tapered section 3321 can easily push the adjustable shaft 332 to deflect. Since the guide surface 3342 is located on the inner side of the two guide holes 3341, the tapered sections 3321 of the two adjustable shafts 332 move in opposite directions, so that the two adjustable rollers 331 are close to each other to clamp the circuit board. The guide surface 3342 can also be a curved surface or an inclined surface, which can abut against the tapered section 3321 and play the role of pushing the tapered section 3321.

[0040] When the circuit board flipping device is in operation, the two adjustable roller groups 330 and the multiple conveying roller groups 340 of the two conveying mechanisms 300 of the circuit board flipping device are arranged in a row, and the two sides of the circuit board are respectively connected to a conveying mechanism 300, so that the circuit board can be conveyed. The two conveying mechanisms 300 are driven to rotate 180° by the rotating bracket 200 to realize the flipping of the circuit board, and the position of the circuit board remains unchanged, eliminating the trouble of repositioning, and can be directly conveyed to the next production equipment. The circuit board flipping device can be applied to automated production lines to replace manual flipping and positioning of circuit boards, thereby improving production efficiency.

[0041] In order to fix the circuit board during the flipping process, the two adjustable rollers 331 of the adjustable roller group 330 are supported by the self-aligning bearing 322, and the angle can be adjusted. The guide plate 334 is driven forward by the second driving member 333, and the guide surface 3342 of the guide plate 334 cooperates with the tapered section 3321, so that the two adjustable rollers 331 of the adjustable roller group 330 move toward each other to clamp the circuit board, and prevent the circuit board from shifting and falling off during the flipping process, thereby improving reliability. After the flipping is completed, the guide plate 334 is driven backward by the second driving member 333, and the adjustable roller 331 located at the bottom drives the adjustable shaft 332 to deflect under the action of gravity, so that the adjustable shaft 332 contacts the guide surface 3342, and the adjustable roller 331 returns to a horizontal state to support the circuit board, and the height of the adjustable roller 331 is consistent with the height of the corresponding conveying roller 341, while the adjustable roller 331 located at the top remains in a deflected state. It can be understood that the adjustable roller 331 can rotate freely around the adjustable shaft 332, and when the circuit board moves, the adjustable roller 331 rotates passively.

[0042] It is understandable that the distance between the two conveying rollers 341 of each conveying roller group 340 is greater than the thickness of the circuit board. During the conveying process, only the conveying roller 341 below each conveying roller group 340 contacts the circuit board. The third driving member can be a motor and a synchronous belt. The motor drives the synchronous belt. The rotating shaft of the conveying roller 341 is connected with a gear. The gear is meshed with the synchronous belt. The synchronous belt drives the conveying rollers 341 below the multiple conveying roller groups 340 to rotate synchronously, thereby conveying the circuit board. In addition, the third driving member can be a motor and a driving gear. The rotating shaft of the conveying roller 341 is connected with a gear. The gear is meshed with the driving gear. Through the transmission of multiple driving gears, the conveying rollers 341 below the multiple conveying roller groups 340 are synchronously driven to rotate, which can also meet the needs of conveying circuit boards.

[0043] In some embodiments of the first aspect of the present invention, the second driving member 333 is an electric push rod, and the guide plate 334 is fixedly connected to the end of the output rod of the electric push rod. The electric push rod drives the guide plate 334 to move forward or backward, and the moving distance is stable and controllable, and the position of the guide plate 334 is accurately defined, so that the two adjustable rollers 331 clamp the circuit board. Of course, the second driving member 333 can also adopt other structures, such as a cylinder, a motor-driven cam, etc.

[0044] It is understandable that if Figure 4 As shown, in some embodiments of the first aspect of the present invention, a plurality of circular holes are provided on the panel 320, and the adjustable shaft 332 passes through the circular holes, and both ends of the side walls of the circular holes are provided with chamfers, and the diameter of the circular hole is larger than the diameter of the adjustable shaft 332. When the guide plate 334 moves and pushes the two adjustable rollers 331 of the adjustable roller group 330 to move toward each other to clamp the circuit board, the adjustable shaft 332 can deflect at a certain angle in the circular hole to prevent interference. Alternatively, the diameter of the circular hole can be directly set to a larger size, and the gap between the adjustable shaft 332 and the inner wall of the circular hole is larger, so as to meet the deflection requirement of the adjustable shaft 332.

[0045] It is understandable that each time the circuit board is flipped, the rotating bracket 200 needs to rotate 180° with the two conveying mechanisms 300 and the circuit board. If the flipping angle is inaccurate, bumps, jams and other problems may occur during the transfer of the circuit board. From the perspective of production efficiency, the faster the rotation speed, the better. However, after a fast rotation, the stopping position is prone to errors and a balance needs to be achieved. To this end, in some embodiments of the first aspect of the present invention, the base 100 is connected to a brake mechanism 400, and the brake mechanism 400 includes a brake sleeve 410 and a brake pressure plate 420. The brake sleeve 410 is annular and is mounted on the outside of the support shaft 210. The brake sleeve 410 can be fixed on the side of the vertical plate 110 or the bearing seat 120. The brake sleeve 410 is provided with a radially arranged slide groove 411, and the brake pressure plate 420 is slidably set in the slide groove 411. The side of the brake pressure plate 420 facing the support shaft 210 is set to a curved surface matching the support shaft 210, and the side of the brake pressure plate 420 away from the support shaft 210 is connected to a fourth driving member 430. An angle detection component is also provided on the base 100 to detect the rotation angle of the support shaft 210. The base 100 has a controller, and the angle detection component and the fourth driving member are electrically connected to the controller. During the rotation of the circuit board, when it rotates to a specific angle (for example, 120 degrees), the angle detection component sends a detection signal to the controller, and the controller controls the fourth driving member to start, so that the brake pressure plate 420 moves toward the support shaft 210 and contacts the brake pressure plate 420 away from the support shaft 210 to brake, thereby helping the rotating bracket 200 to stop, accurately rotate 180°, and reduce the time spent on flipping the circuit board, helping to improve production efficiency.

[0046] It is understandable that in some embodiments of the first aspect of the present invention, the fourth driving member 430 is an electromagnet, the outer wall of the brake sleeve 410 is provided with a magnetic attraction portion, the electromagnet and the magnetic attraction portion are arranged adjacent to each other, and when the electromagnet is energized to generate a magnetic attraction force, the electromagnet and the magnetic attraction portion attract each other, thereby driving the brake pressure plate 420 to move toward the support shaft 210, and the magnitude of the magnetic attraction force can be controlled by controlling the current input to the electromagnet, thereby controlling the magnitude of the braking force. In addition, the fourth driving member 430 can also adopt structures such as electric push rods and cylinders, which can also meet the needs of driving the brake pressure plate 420.

[0047] It is understandable that the angle detection component can be a trigger-type travel switch or a photoelectric switch, and the trigger component can be installed on the surface of the support shaft 210. When the support shaft 210 rotates to a specific angle, it is detected by the angle detection component. It should be understood that the rotating bracket 200 reciprocates rather than continuously rotates in one direction, because the second driving member 333 and the third driving member used by the conveying mechanism 300 need to connect the circuit, and continuous unidirectional rotation is not conducive to wiring, and using a rotary joint instead is more expensive, so using the reciprocating rotation of the rotating bracket 200 is a better solution.

[0048] The embodiment of the second aspect of the present invention proposes a control method, which is applied to the circuit board flipping device of the embodiment of the first aspect, and the control method includes: S100, when the angle detection component detects that the support shaft 210 is rotated to the set angle, the angle detection component sends a signal to the controller; S200, the controller receives the signal of the angle detection component, and controls the electromagnet to start; S300, under the action of the magnetic attraction force, the electromagnet moves toward the magnetic attraction part, drives the brake pressure plate 420 to move toward the support shaft 210 and contact the support shaft 210, and causes the support shaft 210 to stop rotating through friction, which is conducive to accurately controlling the rotation angle to 180°, and reducing the time spent on flipping the circuit board, helping to improve production efficiency.

[0049] It can be understood that in some embodiments of the second aspect of the present invention, in step S300, the magnetic attraction force generated by the electromagnet includes a first increasing interval, a first decreasing interval, a second increasing interval, a first decreasing interval and a stable pressure maintaining interval, the magnetic attraction force increases rapidly in the first increasing interval, so that the driving brake pressure plate 420 moves rapidly toward the support shaft 210 and contacts the support shaft 210, and reaches the maximum magnetic attraction force after passing through the first increasing interval, the magnetic attraction force gradually decreases in the first decreasing interval, and the friction force gradually decreases during the deceleration process, the magnetic attraction force gradually increases in the second increasing interval, and the friction force gradually increases during the deceleration process, wherein the maximum friction force reached is less than the maximum friction force that can be reached in the first increasing interval, the acceleration of deceleration gradually increases, and then the magnetic attraction force gradually decreases again in the second decreasing interval, and the friction force gradually decreases during the deceleration process, and the acceleration of deceleration gradually decreases, and finally in the stable pressure maintaining interval, the magnetic attraction force is maintained at a stable pressure (within 3% deviation) until the rotating bracket 200 stops rotating.

[0050] It can be understood that the variation curve of the magnetic attraction force satisfies the following in the first increasing interval: , X is time, Y is magnetic attraction, the process of increasing magnetic attraction is that the acceleration is getting bigger and bigger, when the brake pressure plate 420 contacts the support shaft 210, the friction force is small, and then gradually increases, to prevent the brake pressure plate 420 from contacting the support shaft 210 when the first resistance is too large, to avoid the problem of the motor of the first driving member being blocked or burned. The change curve of magnetic attraction in the first reduction interval meets: , the acceleration remains unchanged during the reduction of the magnetic attraction force, and the friction force applied by the brake pressure plate 420 to the support shaft 210 steadily decreases; the change curve of the magnetic attraction force in the second increase interval satisfies: , the acceleration of the magnetic attraction force increases, but compared with the first increasing interval, the acceleration of the magnetic attraction force is smaller, and the friction force applied by the brake pressure plate 420 to the support shaft 210 changes slowly; the change curve of the magnetic attraction force in the second decreasing interval satisfies: As the magnetic attraction decreases, the acceleration gradually decreases, and the friction force applied by the brake pressure plate 420 to the support shaft 210 decreases less and less, and finally a stable pressure (within a deviation of 3%) is maintained in the stable pressure range, so that the rotating bracket 200 stops rotating, which is conducive to speeding up the stopping speed, reducing time, and improving production efficiency.

[0051] The automated production line of the third embodiment of the present invention comprises a feeding device 510, a first plugging machine 520, a circuit board flipping device, a second plugging machine 530, a first screen printer 540, a circuit board flipping device and a second screen printer 550 arranged in sequence, wherein the circuit board flipping device is the circuit board flipping device proposed in the first embodiment. In the production process of the circuit board, the feeding device 510 feeds the circuit board into the first plugging machine 520, the first plugging machine 520 completes the plugging of one side, then the circuit board is transported to the first circuit board flipping device for flipping, the circuit board is transported to the second plugging machine 530 for plugging of the other side, the circuit board is transported to the first screen printer 540 for screen printing on one side, then the circuit board is transported to the second circuit board flipping device for flipping, and finally the circuit board is transported to the second screen printer 550 for screen printing on the other side, and then the circuit board can be unloaded or sent to other equipment.

[0052] The circuit board flipping device includes a machine base 100, a rotating bracket 200 and two conveying mechanisms 300. The machine base 100 is the foundation of the circuit board flipping device and is usually fixed on the ground of the factory or on other equipment. A vertical plate 110 is respectively arranged at both ends of the machine base 100, and the two vertical plates 110 are arranged relatively. A bearing seat 120 is arranged at the upper end of the vertical plate 110. A support shaft 210 is respectively arranged at both ends of the rotating bracket 200. The support shaft 210 is supported on the bearing seat 120 through bearings, and various types of bearings such as ball bearings and roller bearings can be selected. The rotating bracket 200 is connected to a first driving member. The function of the first driving member is to drive the rotating bracket 200 to rotate. The first driving member can be installed inside the bearing seat 120. For example, the first driving member adopts a motor and a reduction gearbox, and the rotating shaft of the motor is connected to the support shaft 210 through the reduction gearbox.

[0053] The two conveying mechanisms 300 are both mounted on the rotating bracket 200 and are symmetrically distributed at both ends of the rotating bracket 200, corresponding to the width of the circuit board. The conveying mechanism 300 includes a shell 310, a panel 320, two adjustable roller groups 330 and a plurality of conveying roller groups 340. The shell 310 has an opening formed inside thereof. The panel 320 is connected to the side of the shell 310 and covers the opening of the mounting cavity 311. The two adjustable roller groups 330 and the plurality of conveying roller groups 340 are both mounted on the panel 320 and are arranged in a row along the length direction of the panel 320 to match the shape of the circuit board. The two adjustable roller groups 330 are located at both ends of the plurality of conveying roller groups 340. The plurality of conveying roller groups 340 are used to drive the circuit board to move. The adjustable roller group 330 includes two adjustable rollers 331. The adjustable rollers 331 are connected to the sides of the shell 310. An adjustable shaft 332 is connected, and the panel 320 is provided with an adjustable seat 321. The adjustable shaft 332 is installed on the adjustable seat 321 through a self-aligning bearing 322. A second driving member 333 is connected to the adjustable seat 321. The second driving member 333 is provided with a guide plate 334. The guide plate 334 is provided with two guide holes 3341. Each guide hole 3341 passes through an adjustable shaft 332. The end of the adjustable shaft 332 away from the adjustable roller 331 is provided with a tapered section 3321. The side wall of the guide hole 3341 is provided with a guide surface 3342. The guide surface 3342 is located on the inner side where the two guide holes 3341 are close to each other, and the guide surface 3342 abuts against the tapered section 3321. The conveying roller group 340 includes two conveying rollers 341. The conveying roller 341 is connected to a third driving member. The conveying roller 341 is driven to rotate by the third driving member, thereby driving the circuit board to move and realize conveying. When the guide plate 334 moves along the axial direction of the adjustable shaft 332, the adjustable shaft 332 can be easily pushed to deflect through the tapered section 3321. Since the guide surface 3342 is located on the inner side of the two guide holes 3341, the tapered sections 3321 of the two adjustable shafts 332 move in opposite directions, so that the two adjustable rollers 331 are close to each other to clamp the circuit board, thereby preventing the circuit board from shifting or falling off during the flipping process.

[0054] In some embodiments of the third aspect of the present invention, a through-beam photoelectric sensor is provided on opposite sides of the second hole plugging machine 530 and the circuit board turning device, and the second hole plugging machine 530 is provided with a second conveyor belt 531, and the second conveyor belt 531 is connected to the second lifting seat, and the second lifting seat is electrically connected to the through-beam photoelectric sensor, and the through-beam photoelectric sensor includes a transmitting end and a receiving end, and the transmitting end is connected to the second lifting seat, and the receiving end is fixed to the base 100 of the circuit board turning device. The through-beam photoelectric sensor is used to detect whether the heights of the second hole plugging machine 530 and the circuit board turning device correspond. If the heights do not correspond, the height of the second conveyor belt 531 is adjusted by the second lifting seat, and the height of the transmitting end is adjusted at the same time, until the heights of the through-beam photoelectric sensor including the transmitting end and the receiving end are consistent, and the heights of the second hole plugging machine 530 and the circuit board turning device correspond, so that the conveying and handover of the circuit board are successfully completed to prevent bumps or circuit boards from getting stuck.

[0055] Similarly, the second screen printer 550 and the circuit board flipping device are provided with a through-beam photoelectric sensor on the opposite side thereof, and the second screen printer 550 is provided with a third conveyor belt 551, and the third conveyor belt 551 is connected to the third lifting seat, and the third lifting seat is electrically connected to the through-beam photoelectric sensor. The through-beam photoelectric sensor includes a transmitting end and a receiving end, and the transmitting end is connected to the third lifting seat, and the receiving end is fixed to the base 100 of the circuit board flipping device. The through-beam photoelectric sensor is used to detect whether the heights of the second screen printer 550 and the circuit board flipping device correspond. If the heights do not correspond, the height of the third conveyor belt 551 is adjusted by the third lifting seat, and the height of the transmitting end is adjusted at the same time, until the heights of the through-beam photoelectric sensor, including the transmitting end and the receiving end, are consistent, and the heights of the second screen printer 550 and the circuit board flipping device correspond, so that the conveying and handover of the circuit board are successfully completed to prevent bumps or jams of the circuit board.

[0056] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A circuit board turning device, characterized in that: include: A machine base, wherein the machine base is provided with two opposite vertical plates, and a bearing seat is provided at the upper end of the vertical plates; A rotating bracket, wherein two ends of the rotating bracket are respectively provided with support shafts, the support shafts are supported by the bearing seat, and the rotating bracket is connected to a first driving member; Two conveying mechanisms are connected to the rotating bracket, and the two conveying mechanisms are symmetrically distributed at both ends of the rotating bracket. The conveying mechanism includes a shell, a panel, two adjustable roller groups and a plurality of conveying roller groups. The shell forms an installation cavity with an opening inside, and the panel is connected to the side of the shell and covers the opening of the installation cavity. The two adjustable roller groups and the plurality of conveying roller groups are installed on the panel and arranged in a row along the length direction of the panel. The two adjustable roller groups are located at both ends of the plurality of conveying roller groups. Wherein, the adjustable roller group includes two adjustable rollers, the adjustable rollers are connected with an adjustable shaft, the panel is provided with an adjustable seat, the adjustable shaft is installed on the adjustable seat through a self-aligning bearing, the adjustable seat is connected with a second driving member, the second driving member is provided with a guide plate, the guide plate is provided with two guide holes, each of the guide holes passes through one of the adjustable shafts, the end of the adjustable shaft away from the adjustable roller is provided with a tapered section, the side wall of the guide hole is provided with a guide surface, the guide surface is located on the inner side where the two guide holes are close to each other, and the guide surface abuts the tapered section; the conveying roller group includes two conveying rollers, the conveying rollers are connected with a third driving member, when the guide plate moves along the axial direction of the adjustable shaft, the adjustable shaft can be pushed to deflect through the tapered section, and the tapered sections of the two adjustable shafts move in opposite directions, so that the two adjustable rollers are close to each other to clamp the circuit board, and prevent the circuit board from shifting and falling off during the flipping process.

2. The circuit board turning device according to claim 1, characterized in that: The second driving member includes an electric push rod, and the guide plate is fixedly connected to the end of an output rod of the electric push rod.

3. The circuit board turning device according to claim 1, characterized in that: The panel is provided with a circular hole for the adjustable shaft to pass through, both ends of the side wall of the circular hole are provided with chamfers, and the diameter of the circular hole is larger than the diameter of the adjustable shaft.

4. The circuit board turning device according to claim 1, characterized in that: The distance between the two conveying rollers of each conveying roller group is greater than the thickness of the circuit board. The third driving member includes a motor and a synchronous belt. The motor is used to drive the synchronous belt. The rotating shaft of the conveying roller is connected to a gear, and the gear is meshed with the synchronous belt.

5. The circuit board turning device according to claim 1, characterized in that: The base is connected to a brake mechanism, which includes a brake sleeve and a brake pressure plate. The brake sleeve is annular and is sleeved on the outside of the support shaft. The brake sleeve is provided with a radially arranged slide groove, and the brake pressure plate is slidably arranged in the slide groove. The side of the brake pressure plate facing the support shaft is arranged to match the arc surface of the support shaft, and the side of the brake pressure plate away from the support shaft is connected to a fourth driving member. The base is provided with an angle detection component to detect the rotation angle of the support shaft. The base has a controller, and the angle detection component and the fourth driving member are electrically connected to the controller.

6. The circuit board turning device according to claim 5, characterized in that: The fourth driving member is an electromagnet, the outer wall of the brake sleeve is provided with a magnetic attraction portion, and the electromagnet and the magnetic attraction portion are arranged adjacent to each other.

7. A control method for a circuit board flipping device, characterized in that: Applied to the circuit board flipping device as described in claim 6, the control method includes: S100, when the angle detection component detects that the support shaft rotates to the set angle, the angle detection component sends a signal to the controller; S200, the controller receives the signal of the angle detection component, and controls the electromagnet to start; S300, under the action of the magnetic attraction force, the electromagnet moves toward the magnetic attraction part, drives the brake pressure plate to move toward the support shaft and contact the support shaft, and causes the support shaft to stop rotating through friction.

8. The control method according to claim 7, characterized in that: In the step S300, the magnetic attraction force generated by the electromagnet includes a first increasing interval, a first decreasing interval, a second increasing interval, a second decreasing interval and a stable pressure maintaining interval.

9. Automated production line, characterized in that, The invention comprises a feeding device, a first plugging machine, a circuit board turning device as claimed in any one of claims 1 to 6, a second plugging machine, a first screen printer, a circuit board turning device as claimed in any one of claims 1 to 6 and a second screen printer which are arranged in sequence.

10. The automated production line according to claim 9, characterized in that: A first through-beam photoelectric sensor is arranged on opposite sides of the second hole plugging machine and the circuit board turning device, and the second hole plugging machine is provided with a second conveyor belt, the second conveyor belt is connected to a second lifting seat, and the second lifting seat is electrically connected to the first through-beam photoelectric sensor; a second through-beam photoelectric sensor is arranged on opposite sides of the second screen printing machine and the circuit board turning device, and the second screen printing machine is provided with a third conveyor belt, the third conveyor belt is connected to a third lifting seat, and the third lifting seat is electrically connected to the second through-beam photoelectric sensor.

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