Board turning mechanism for PCB (Printed Circuit Board) processing

Abstract

The invention is suitable for the field of PCB processing, and provides a board turning mechanism for PCB processing, the board turning mechanism comprises a conveying assembly, a first motor, a turning assembly, a fixing part and a transmission part, the conveying assembly comprises a conveying frame, and two first film pressure sensors are fixedly connected in the conveying frame; the number of the first motors is two, and the two first motors are connected to the front face and the back face of the conveying frame correspondingly. In the invention, different board thicknesses are adapted, and surface damage is avoided: the clamping force is fed back in real time through the pressure sensor, and the controller accurately regulates and controls the stroke of the first air cylinder according to a preset threshold value, so that the PCB with different thicknesses is automatically adapted. The clamp does not need to be manually and frequently adjusted, the remodeling efficiency is improved, the clamping force is accurately controlled, scratches and pressing damage caused by improper clamping force on the surface of a plate are effectively avoided, and the appearance and performance integrity of the PCB are guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of PCB board processing, and in particular relates to a flipping mechanism for PCB board processing. Background Art

[0002] In the electronics manufacturing industry, PCBs (printed circuit boards), as core components of electronic devices, play a crucial role in providing electrical connections and physical support for electronic components. As electronic products evolve towards miniaturization and higher precision, PCB circuit density continues to increase, and processing becomes increasingly complex. Multiple processes, such as drilling, etching, and solder masking, require sequential processing on both sides. Turning the board over has become essential to ensure processing integrity and consistency.

[0003] Traditional panel flipping equipment has significant limitations: First, the clamping adaptability is insufficient. PCB thickness varies greatly depending on product requirements (for example, the thickness of consumer electronics PCBs can fluctuate between 0.2mm and 3.2mm). Traditional panel flipping machines often use rigid fixtures that rely on manual adjustment. When switching to produce panels of varying thicknesses, if the fixture adjustment lags or lacks precision, a clamp that is too loose can easily cause the PCB to fall off during flipping, resulting in scrapped panels and production line stagnation. A clamp that is too tight can squeeze the panel, deforming the copper foil and causing delamination of the substrate, leading to hidden faults such as short circuits and open circuits, significantly increasing subsequent testing and repair costs.

[0004] Therefore, a PCB board processing flip mechanism is needed to solve the above problems. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a flip mechanism for PCB board processing to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A flip mechanism for PCB board processing, comprising a conveying assembly, a first motor, a flip assembly, a fixing member and a transmission member, wherein the conveying assembly comprises a conveying frame, and two first film pressure sensors are fixedly connected to the conveying frame;

[0008] There are two first motors, which are respectively connected to the front and back of the conveyor frame;

[0009] The two lever arrangement comprises a first end of a shaft, and a second end of a shaft is connected to the two link blocks, wherein the two first links are connected to each other via a pin, and the bottom ends of the two link blocks are hinged to the second movable block via a pin, and the second movable block is slidably connected to the two link blocks, and the four guide rods are respectively connected to the two rotating seats. The outer sleeve of the guide rod is connected to a spring, and two pressure sensors are connected to the rotating seat. The top end of the guide rod is overlapped with the pressure sensor, and the two ends of the spring are overlapped with the rotating seat and the pressure sensor respectively. The first movable block and the second movable block are rotatably connected to the first rotating roller, and the four first rotating rollers located in the front and the four first rotating rollers located in the rear are connected by a first belt transmission. The side of the two first movable blocks located on one side that is away from each other is connected to the second motor, and the output shafts of the two second motors are connected to the first rotating roller;

[0010] The two rotating seats are both connected to the positioning plate, and the same side of the two positioning plates is connected to a second film pressure sensor;

[0011] The upper surfaces of the two rotating seats are both connected to the controller.

[0012] According to a further technical solution, the sides of the two rotating seats that are away from each other are respectively connected to the output shafts of the two first motors, the top of the rotating seat is connected to the first cylinder, and the bottom ends of the two first cylinders are connected to the movable seat.

[0013] According to a further technical solution, the top of the rotating seat is connected to two second telescopic rods, and the second telescopic rods are connected to the top of the rotating seat.

[0014] According to a further technical solution, one side of each of the two rotating seats is connected to a pressure block, and the position of the pressure block corresponds to the position of the first film pressure sensor.

[0015] A further technical solution is that the fixing member includes a second cylinder and two third telescopic rods, the second cylinder and the two third telescopic rods are both connected in the rotating seat, the second cylinder and the two third telescopic rods are connected to the same splint, and the two splints are both arranged in the rotating seat.

[0016] A further technical solution is that there are two transmission members, each of which includes two second rotating rollers, which are rotatably connected to the rotating base, the two second rotating rollers located on one side are connected to the third motor, and the two third motors are connected to the rotating base, and the two second rotating rollers located in the front and the two rotating rollers located in the back are connected by a second belt drive.

[0017] According to a further technical solution, the surfaces of the first belt and the second belt are both provided with anti-slip grooves, the clamping plate is provided above the second belt, and the clamping plate is provided below the first belt.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention adapts to different board thicknesses and avoids surface damage: A pressure sensor provides real-time feedback on the clamping force, and a controller precisely adjusts the first cylinder stroke based on a preset threshold, automatically adapting to PCB boards of varying thicknesses. This eliminates the need for frequent manual clamp adjustments, improving changeover efficiency. Precisely controlling the clamping force effectively prevents scratches and bruises on the board surface caused by improper clamping force, ensuring the appearance and performance integrity of the PCB board.

[0020] The present invention provides stable clamping and prevents falling off: the anti-slip belt provides basic friction, the spring and pressure sensor cooperate to achieve adaptive pressure compensation, and the fixing parts assist in clamping from both sides. The multi-dimensional clamping strategy ensures that the PCB board is stable during the flipping process. Even thick and easily shaken boards can be firmly fixed, solving the problem of "flipping and falling off" in traditional flipping machines and improving the processing yield rate.

[0021] The present invention features intelligent sensing and automated control: with the controller as the core, it integrates multiple types of sensors (thin film pressure sensors, pressure sensors) to collect signals such as panel position and clamping force in real time, automatically triggering the "conveying-clamping-flipping-unloading" action, replacing manual intervention, simplifying the operating process, improving production efficiency, adapting to large-scale and diversified PCB board processing scenarios, and reducing labor costs and the risk of operational errors.

[0022] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention in a front view;

[0024] Figure 2 It is a schematic diagram of the structure of a partial front view of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the movable seat of the present invention in a front view;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlarged in the middle;

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the rotating seat of the present invention in a side view;

[0028] Figure 6It is a schematic diagram of the cross-sectional structure of the rotating seat of the present invention when viewed from above;

[0029] Figure 7 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the rotating seat of the present invention.

[0030] In the figure: 1. conveying assembly; 11. conveying frame; 12. first film pressure sensor; 2. first motor; 3. flip assembly; 31. rotating seat; 32. first cylinder; 33. movable seat; 34. driving member; 341. first telescopic rod; 342. first movable block; 343. second movable block; 344. connecting rod; 345. guide rod; 346. spring; 347. pressure sensor; 348. first rotating roller; 349. first belt; 3410. second motor; 35. second film pressure sensor; 36. second telescopic rod; 37. positioning plate; 38. pressing block; 4. fixing member; 41. second cylinder; 42. splint; 43. third telescopic rod; 5. transmission member; 51. second rotating roller; 52. second belt; 53. third motor; 6. controller. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0033] Example 1

[0034] like Figure 1-Figure 7 As shown, an embodiment of the present invention provides a flip mechanism for PCB board processing, including a conveying assembly 1, a first motor 2, a flip assembly 3, a fixing member 4 and a transmission member 5. The conveying assembly 1 includes a conveying frame 11, and two first film pressure sensors 12 are fixedly connected to the conveying frame 11;

[0035] There are two first motors 2, and the two first motors 2 are connected to the front and back of the conveying frame 11 respectively;

[0036] The flip assembly 3 includes two rotating seats 31 and two driving members 34. The driving member 34 includes a first telescopic rod 341. The two first telescopic rods 341 are connected to the rotating seat 31. Both ends of the first telescopic rod 341 are connected to the first movable block 342. The sides of the two first movable blocks 342 that are close to each other are hinged to the top ends of the two connecting rods 344 through pins. The bottom ends of the two connecting rods 344 are hinged to the second movable block 343 through pins. A guide rod 345 is slidably connected in the second movable block 343. The four guide rods 345 are respectively connected to the two rotating seats 31. The outer cover of the guide rod 345 is connected to a spring 34. 6. Two pressure sensors 347 are connected to the rotating base 31. The top of the guide rod 345 overlaps the pressure sensor. The two ends of the spring 346 overlap the rotating base 31 and the pressure sensor 347 respectively. The first movable block 342 and the second movable block 343 are both rotatably connected to the first rotating roller 348. The four first rotating rollers 348 at the front and the four first rotating rollers 348 at the rear are connected by a first belt 349. The two first movable blocks 342 on one side are connected to the second motor 3410 on the side away from each other. The output shafts of the two second motors 3410 are connected to the first rotating roller 348.

[0037] The two rotating seats 31 have their sides facing away from each other connected to the output shafts of the two first motors 2, respectively. The top of the rotating seat 31 is connected to a first cylinder 32, and the bottom ends of the two first cylinders 32 are connected to a movable seat 33. The top of the rotating seat 31 is connected to two second telescopic rods 36, which are connected to the top of the rotating seat 31. One side of the two rotating seats 31 is connected to a pressure block 38, and the position of the pressure block 38 corresponds to the position of the first film pressure sensor 12.

[0038] There are two transmission members 5, each of which includes two second rotating rollers 51, which are rotatably connected to the rotating base 31. The two second rotating rollers 51 on one side are both connected to the third motor 53, and the two third motors 53 are both connected to the rotating base 31. The two second rotating rollers 51 at the front and the two rotating rollers at the rear are both connected by a second belt 52.

[0039] The surfaces of the first belt 349 and the second belt 52 are both provided with anti-slip grooves, and the clamping plate 42 is provided above the second belt 52, and the clamping plate 42 is provided below the first belt 349;

[0040] The upper surfaces of the two rotating seats 31 are both connected to the controller 6 .

[0041] In this embodiment, when the device needs to be used, the controller 6 controls the second motor 3410 and the third motor 53 to work synchronously. The working second motor 3410 drives one of the first rotating rollers 348 to rotate in the first movable block 342. The rotating first rotating roller 348 drives the other first rotating rollers 348 to rotate synchronously through the first belt 349. The rotating first rotating rollers 348 rotate in the first movable block 342 and the second movable block 343 respectively. The lower side of the rotating first belt 349 moves in the direction of the positioning plate 37.

[0042] The second motor 3410 operates at the same time to drive one of the second rotating rollers 51 to rotate. The rotating second rotating roller 51 drives the other second rotating roller 51 to rotate through the second belt 52. The upper direction of the rotating second belt 52 moves in the direction of the positioning plate 37.

[0043] When the conveyor frame 11 on one side of the rotating seat 31 conveys the PCB board to the surface of the second belt 52, the rotating second belt 52 drives the PCB board to move toward the positioning plate 37. When the moving PCB board contacts the two second film pressure sensors 35, the signals detected by the two second film pressure sensors 35 are transmitted to the controller 6, and then the controller 6 controls the corresponding first cylinder 32 and second cylinder 41 to extend synchronously.

[0044] The first cylinder 32 drives the movable seat 33 to move downward, and the downwardly moving movable seat 33 drives the driving member 34 to move downward, so that the downwardly moving first belt 349 contacts the upper surface of the PCB. Because the surfaces of the first belt 349 and the second belt 52 are both provided with anti-slip grooves, there is a large friction between the first belt 349 and the second belt 52 and the PCB, so that the rotating first belt 349 and the second belt 52 can firmly clamp the PCB in the rotating seat 31.

[0045] When the first cylinder 32 continues to extend, the first belt 349 and the first rotating roller 348 connected in rotation by the second movable block 343 remain stationary, and then the first rotating roller 348 below drives the corresponding two first movable blocks 342 to move away from each other through the second movable block 343 and the connecting rod 344, and the two first movable blocks 342 moving away from each other drive the first telescopic rod 341 to extend, and at the same time the moving movable seat 33 drives the guide rod 345 to move downward, and the downward moving movable seat 33 compresses the spring 346 through the pressure sensor 347, and the contracted spring 346 squeezes the pressure sensor 347. When the signal detected by the pressure sensor 347 is transmitted to the controller 6, when the controller 6 detects the signal detected by the pressure sensor 347 When the pressure value reaches the set value, the controller 6 controls the first motor 2 to work, and the working first motor 2 drives the rotating seat 31 to rotate counterclockwise. When the rotating seat 31 rotates 180 degrees, the rotating rotating seat 31 drives the pressure block 38 to contact the first film pressure sensor 12. At this time, the first film pressure sensor 12 and the controller 6 cooperate with each other to control the first motor 2 to stop working, control the second cylinder 41 to contract, and the contracted second cylinder 41 drives the clamping plate 42 to separate from the PCB board. The second motor 3410 and the third motor 53 are controlled to rotate in opposite directions, so that the rotating first belt 349 and the second belt 52 drive the PCB board to move out of the rotating seat 31, and in this process, the PCB board is transported to the conveying rack 11 on the other side.

[0046] Example 2

[0047] The difference between this embodiment and the first embodiment is that the two rotating seats 31 are both connected to the positioning plate 37 , and the second film pressure sensor 35 is connected to the same side of the two positioning plates 37 .

[0048] In this embodiment, after the moving PCB board contacts the two second film pressure sensors 35, when the two working first motors 2 drive the rotating base 31 to rotate counterclockwise, the rotating rotating base 31 synchronously drives the positioning plate 37 to rotate downward. In this process, the two positioning plates 37 can block and limit the PCB board through the second film pressure sensors 35, so that the PCB board will not fall off the rotating base 31, so that the PCB board can be flipped smoothly, further enhancing the stability of the PCB board during the flipping process, so that the PCB board is not easy to fall off the rotating base 31.

[0049] Example 3

[0050] The difference between this embodiment and embodiment 2 is that the fixing member 4 includes a second cylinder 41 and two third telescopic rods 43, the second cylinder 41 and the two third telescopic rods 43 are connected to the rotating base 31, and the second cylinder 41 and the two third telescopic rods 43 are connected to the same clamping plate 42, and the two clamping plates 42 are both arranged in the rotating base 31;

[0051] In this embodiment, when the moving PCB comes into contact with the two second film pressure sensors 35, the second cylinder 41 extends, and the two extended second cylinders 41 drive the two clamping plates 42 to approach each other. The two clamping plates 42 approaching each other respectively contact the two sides of the PCB. The two clamping plates 42 approaching each other can clamp and fix the PCB, further strengthening the fixing effect of the PCB.

[0052] Working principle of the present invention:

[0053] The flip mechanism uses the controller 6 as the core hub, cooperates with the first film pressure sensor 12, the second film pressure sensor 35, the pressure sensor 347, and links the first motor 2, the second motor 3410, the third motor 53, the first cylinder 32, the second cylinder 41, the first telescopic rod 341, the second telescopic rod 36, the third telescopic rod 43 and other actuators to achieve automatic and adaptive control of the entire process of "conveying-clamping-flipping-unloading" of the PCB board;

[0054] Delivery and initial testing phase:

[0055] The controller 6 pre-starts the second motor 3410 and the third motor 53 and sets the rotation direction to forward. The second motor 3410 drives the first rotating roller 348, which in turn, via the first belt 349, links the other first rotating rollers 348 in the same group, causing the first belt 349 to move downward toward the positioning plate 37. The third motor 53 drives the second rotating roller 51, which in turn, via the second belt 52, links the other second rotating rollers 51 in the same group, causing the second belt 52 to move upward toward the positioning plate 37, thereby establishing the conveying power.

[0056] When the PCB enters the rotating seat 31 via the conveyor frame 11 and is driven by the second belt 52 to move toward the positioning plate 37, and touches the second film pressure sensor 35, the second film pressure sensor 35 converts the pressure signal into an electrical signal and transmits it to the controller 6. This is the "board in place" signal, triggering the subsequent clamping and flipping actions;

[0057] Adaptive clamping phase:

[0058] After receiving the signal from the second film pressure sensor 35, the controller 6 controls the extension of the first cylinder 32 and the second cylinder 41 simultaneously. The extension of the second cylinder 41 drives the clamping plate 42, which is guided by the third telescopic rod 43 to clamp the PCB from both sides to strengthen the fixation.

[0059] The first cylinder 32 drives the movable seat 33 downward, and the driving member 34 descends accordingly, causing the first belt 349 to contact the upper surface of the PCB. Because the first and second belts 52 are provided with anti-slip grooves, friction is generated with the PCB to initially clamp the PCB. As the first cylinder 32 continues to extend, the first rotating roller 348 below is fixed in position, and the second movable block 343 and connecting rod 344 force the first movable block 342 to move to the sides, stretching the first telescopic rod 341. At the same time, the movable seat 33 presses down the guide rod 345, compressing the spring 346 and squeezing the pressure sensor 347. The pressure sensor 347 monitors the pressure value in real time, converts it into an electrical signal, and transmits it back to the controller 6.

[0060] When the controller 6 determines that the feedback value of the pressure sensor 347 reaches the preset "safe clamping force threshold" to adapt to different board thicknesses to avoid damage or falling off, it determines that the PCB board has been firmly clamped, stops the extension action of the first cylinder 32, and completes the adaptive clamping;

[0061] Turning and unloading stage

[0062] After the clamping is completed, the controller 6 starts the first motor 2 and drives the rotating base 31 to flip counterclockwise. During the flipping, the positioning plate 37 rotates synchronously with the rotating base 31, and the second film pressure sensor 35 assists in limiting the position to prevent the PCB board from falling off. When the rotating base 31 flips 180°, the pressure block 38 touches the first film pressure sensor 12 in the conveying frame 11. The sensor sends a signal to the controller 6, determining that the flip is "in place", and controls the first motor 2 to stop.

[0063] Subsequently, the controller 6 controls the second cylinder 41 to contract, and the clamp 42 separates from the PCB board; the second motor 3410 and the third motor 53 are synchronously reversed to make the first belt 349 and the second belt 52 move in the opposite direction, driving the PCB board to be unloaded from the rotating seat 31 and transported to the other side conveying rack 11, completing a flipping process.

[0064] The first film pressure sensor 12, the second film pressure sensor 35, and the pressure sensor 347 are all connected to the analog or digital input port of the signal acquisition interface of the controller 6 through signal cables such as shielded wires to prevent interference and ensure signal stability. The ports are adapted according to the sensor type. For example, the film pressure sensor 347 outputs multiple analog voltage / current signals.

[0065] The first cylinder 32 and the second cylinder 41 realize the extension / contraction action of the cylinder through the electromagnetic control reversing of the solenoid valve, which is connected to the control output interface relay output or pulse output module of the controller 6, and the output electrical signal controls the on / off of the solenoid valve. One side of the solenoid valve is connected to the air source to provide compressed air power, and the other side is connected to the cylinder air port through the air pipe.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A turning mechanism for PCB board processing, comprising a conveying component (1), a first motor (2), a turning component (3), a fixing component (4) and a transmission component (5), characterized in that: The conveying assembly (1) comprises a conveying frame (11), and two first film pressure sensors (12) are fixedly connected to the conveying frame (11); There are two first motors (2), and the two first motors (2) are respectively connected to the front and back of the conveying frame (11); The flip assembly (3) includes two rotating seats (31) and two driving members (34), the driving member (34) includes a first telescopic rod (341), the two first telescopic rods (341) are connected to the rotating seat (31), both ends of the first telescopic rod (341) are connected to the first movable block (342), the adjacent sides of the two first movable blocks (342) are respectively hinged to the top ends of the two connecting rods (344) through pins, the bottom ends of the two connecting rods (344) are respectively hinged to the second movable block (343) through pins, the second movable block (343) is slidably connected with a guide rod (345), the four guide rods (345) are respectively connected to the two rotating seats (31), and the outer shell of the guide rod (345) is connected with a spring. (346), two pressure sensors (347) are connected to the rotating seat (31), the top end of the guide rod (345) is overlapped with the pressure sensor, the two ends of the spring (346) are overlapped with the rotating seat (31) and the pressure sensor (347), the first movable block (342) and the second movable block (343) are both rotatably connected with the first rotating roller (348), the four first rotating rollers (348) located in the front and the four first rotating rollers (348) located in the rear are all connected by a first belt (349), the two first movable blocks (342) on one side are connected to the second motor (3410) at their sides away from each other, and the output shafts of the two second motors (3410) are connected to the first rotating roller (348); The two rotating seats (31) are both connected to the positioning plate (37), and the same side of the two positioning plates (37) is connected to a second film pressure sensor (35); The upper surfaces of the two rotating seats (31) are both connected to the controller (6).

2. The PCB board processing turning mechanism according to claim 1, characterized in that: The sides of the two rotating seats (31) that are separated from each other are respectively connected to the output shafts of the two first motors (2). The top of the rotating seat (31) is connected to the first cylinder (32), and the bottom ends of the two first cylinders (32) are both connected to the movable seat (33).

3. The PCB board processing turning mechanism according to claim 1, characterized in that: Two second telescopic rods (36) are connected to the top of the rotating seat (31), and the second telescopic rods (36) are connected to the top of the rotating seat (31).

4. The PCB board processing turning mechanism according to claim 1, characterized in that: One side of each of the two rotating seats (31) is connected to a pressure block (38), and the position of the pressure block (38) corresponds to the position of the first film pressure sensor (12).

5. The PCB board processing turning mechanism according to claim 1, characterized in that: The fixing member (4) includes a second cylinder (41) and two third telescopic rods (43), the second cylinder (41) and the two third telescopic rods (43) are both connected to the rotating seat (31), the second cylinder (41) and the two third telescopic rods (43) are connected to the same clamping plate (42), and the two clamping plates (42) are both arranged in the rotating seat (31).

6. The turning mechanism for PCB board processing according to claim 1, characterized in that: There are two transmission members (5), each of which includes two second rotating rollers (51), which are rotatably connected to the rotating seat (31), the two second rotating rollers (51) located on one side are both connected to the third motor (53), and the two third motors (53) are both connected to the rotating seat (31), and the two second rotating rollers (51) located in the front and the two rotating rollers located in the rear are both connected through a second belt (52).

7. The turning mechanism for PCB processing according to claim 5, characterized in that: The surfaces of the first belt (349) and the second belt (52) are both provided with anti-slip grooves, the clamping plate (42) is provided above the second belt (52), and the clamping plate (42) is provided below the first belt (349).

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