A circuit board surface coating machine for circuit board production

Abstract

This invention relates to the field of circuit board manufacturing equipment technology, specifically a circuit board surface coating machine for circuit board production. The machine includes a coating chamber, a transverse drive rod mounted on the rear side of the inner wall of the chamber, a robotic arm mounted on the drive rod, a U-shaped bracket mounted at the front end of the robotic arm, and rotating shafts inserted on both sides of the U-shaped bracket. Drive mechanisms are mounted on the rotating shafts, and clamping blocks are fixedly connected to opposite sides of the two rotating shafts. This circuit board surface coating machine, through a linkage structure driven by the rotating shafts, automatically switches the clamping state simultaneously during the 180-degree flipping of the circuit board: during the flipping process, guide rollers move along a circular slide rail, driving the clamping plates to clamp both sides of the circuit board via a linkage mechanism, ensuring clamping stability during the flipping process; after the flipping is complete, the clamping plates automatically open to avoid obstructing the coating area of ​​the circuit board.

Description

Technical Field

[0001] This invention belongs to the technical field of circuit board production and processing equipment, specifically relating to a circuit board surface coating machine, and particularly a circuit board production surface coating machine that combines automatic flipping and clamping, surface dust removal and coating drying functions. Background Technology

[0002] Circuit boards are core components of electronic devices. During their manufacturing process, in order to improve the environmental resistance of circuit boards, they are usually coated with conformal coating to achieve the protective effects of moisture-proof, mildew-proof, and salt spray-proof. This process directly affects the service life and operational reliability of circuit boards.

[0003] Currently, existing circuit board surface coating equipment has the following shortcomings in actual use: Firstly, double-sided coating is inefficient. Existing equipment often requires manual flipping of circuit boards during double-sided coating, or uses complex multi-axis flipping mechanisms. Furthermore, the flipping clamping structure can easily obscure the coating area of ​​the circuit board, requiring multiple adjustments to the clamping position. This not only results in cumbersome procedures and low production efficiency, but also easily causes scratches or positioning deviations on the circuit board surface.

[0004] Secondly, the integration of processes is low, resulting in poor environmental control. In most equipment, the surface dust removal and coating drying processes are independent of each other, and circuit boards need to be transferred between different equipment, which can easily cause secondary dust pollution. Some integrated equipment lacks an effective workstation isolation structure, and coating mist and drying heat can easily spread to the dust removal area, which not only affects the cleaning effect but also makes it difficult to control the working environment.

[0005] Third, the coordination between flipping and clamping actions is poor, and the drive system is redundant. Existing flipping clamping devices mostly use independent drive elements to control the clamping opening and closing and flipping actions separately, resulting in complex equipment structures, high control difficulty and manufacturing costs; moreover, multi-drive coordinated operation is prone to action synchronization deviation, resulting in unstable circuit board clamping, especially for thin circuit boards, which are prone to problems such as board surface deformation and falling off, resulting in insufficient processing stability.

[0006] Fourth, the circuit board operating angle is inconvenient to adjust. During the dust removal and coating process, the circuit board is mostly placed at a fixed angle, making it difficult to achieve multi-angle cleaning and uniform coating. This can easily lead to cleaning dead spots and uneven coating thickness, making it difficult to ensure the consistency of product processing quality. Summary of the Invention

[0007] The purpose of this invention is to provide a circuit board surface coating machine for circuit board production, so as to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a circuit board surface coating machine for circuit board production, including a coating chamber, a transverse drive rod installed on the rear side of the inner wall of the coating chamber, a robotic arm installed on the transverse drive rod, a U-shaped bracket installed at the front end of the robotic arm, rotating shafts inserted on both the left and right sides of the U-shaped bracket, a drive mechanism installed on the rotating shafts, and clamping blocks fixedly connected to opposite sides of the two rotating shafts; The clamping block has auxiliary clamping blocks that are slidably limited on both the upper and lower sides. The two auxiliary clamping blocks are staggered to alternately support the bottom of the circuit board during the flipping process, keeping the bottom of the board supported throughout the process. Each of the two auxiliary clamping blocks has a connecting plate fixedly connected to one side. The two connecting plates are symmetrically slidably arranged on the upper and lower sides of the rotating shaft. The end of the connecting plate away from the auxiliary clamping block is fixedly connected to an inclined roller. The inclined roller has convex cylinders on both sides. The two convex cylinders are staggered relative to each other, and a rolling channel is formed between the two convex cylinders. The rolling channel consists of two staggered arc channels and two inclined channels. When the rotating shaft rotates, the connecting plate is driven to translate along the axis of the rotating shaft by the change of the path of the inclined roller, and the upper and lower auxiliary clamping blocks are driven to complete the exchange of staggered positions. Both convex cylinders are movably sleeved on the outside of the rotating shaft. The two convex cylinders are connected by a fixing plate. One of the convex cylinders, which is closer to the U-shaped bracket, is fixed inside the U-shaped bracket. The connecting plate can rotate inside the convex cylinder that is away from the U-shaped bracket.

[0008] Preferably, the drive mechanism includes a drive motor, which is mounted on a U-shaped bracket. A worm gear is fixedly connected to the rotating shaft of the drive motor, and a worm wheel meshes with the worm gear, which is fixedly sleeved on the rotating shaft.

[0009] Preferably, an annular slide rail is fixedly sleeved on the outer wall of the convex cylinder away from the U-shaped support, and the inner wall of the annular slide rail is composed of two arc-shaped slide rails and two V-shaped slide rails connected alternately. The annular slide rail has two symmetrically arranged guide rollers that slide inside. A cross shaft is installed at one end of each guide roller. A fixed frame is movably sleeved on the horizontal axis of the cross shaft. Fixed plates are fixedly connected to opposite sides of the two fixed frames. The two fixed plates are fixed to the front and rear sides of the clamping block, respectively. Two fixed frames are fixedly connected to L-shaped connecting plates on opposite sides, and bearings are fixedly connected to the two L-shaped connecting plates. The inner ring of the bearing is fixed to the end face of the annular slide rail.

[0010] Preferably, the vertical axis of the cross shaft is located inside the fixed frame, and both ends of the vertical axis are hinged with linkage plates. An L-shaped deflection plate is hinged to the end of the linkage plate away from the cross shaft, and the corner of the L-shaped deflection plate is rotatably connected inside the fixed frame. An auxiliary deflection plate is also rotatably connected within the fixed frame. The auxiliary deflection plate is parallel to one of the component plates of the L-shaped deflection plate, and a clamping plate is hinged to one end of both the auxiliary deflection plate and the L-shaped deflection plate.

[0011] Preferably, two insert rods are inserted into the annular slide rail facing the clamping block. One end of each insert rod is located on the inner wall of the annular slide rail, and the other end is fixedly connected to a U-shaped push plate. The auxiliary clamping block has a T-shaped groove, and a suction cup is installed on the inner wall of the T-shaped groove. The suction end of the suction cup extends to the outside of the auxiliary clamping block. A hinge plate is hinged to the control block inside the suction cup. A T-shaped push rod is fixedly connected to the end of the hinge plate away from the suction cup control block. The end of the T-shaped push rod away from the hinge plate extends to the outside of the T-shaped groove.

[0012] Preferably, a return spring telescopic rod is fixedly connected to the T-shaped push rod, and the end of the return spring telescopic rod away from the T-shaped push rod is fixed in the T-shaped groove.

[0013] Preferably, a dryer is installed on the upper left side of the inner wall of the coating chamber, and a lifting partition is installed in the middle of the coating chamber to separate the internal space of the coating chamber. A coating machine is installed on the left side of the inner wall of the coating machine compartment, and a dust blower and a vacuum cleaner are installed on the right side of the inner wall of the coating machine compartment. The vacuum cleaner is installed in front of the dust blower.

[0014] Preferably, the clamping side of the clamping block is provided with a protective rubber layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention features an integrated process design that improves processing efficiency and environmental control. It integrates dust removal, coating, and drying / curing functions into a single coating chamber, dynamically separating the chamber space via a lifting partition. The dust removal and coating / drying stations are independent, preventing interference from paint mist and heat on the dust removal process. Simultaneously, the invention, combined with a horizontal drive rod and robotic arm, enables automatic transfer of circuit boards between stations, eliminating the need for manual transfer. This improves processing efficiency, avoids secondary contamination during transfer, and ensures coating quality.

[0016] This invention features a rotating clamping mechanism that enables unobstructed double-sided clamping. Through a rotating shaft-driven linkage structure, the clamping state is automatically switched simultaneously during the 180-degree flipping of the circuit board. During the flipping process, guide rollers move along a circular slide rail, driving the clamping plate to clamp both sides of the circuit board via a linkage mechanism, ensuring clamping stability during the flipping process. After the flip is complete, the clamping plate automatically opens, avoiding obstruction of the coating area on the circuit board. Simultaneously, inclined rollers move along a rolling channel formed by a convex cylinder, causing the upper and lower auxiliary clamping blocks to shift and interchange, always providing stable support at the bottom of the circuit board. Double-sided coating can be completed without adjusting the clamping position, effectively reducing the number of clamping operations, avoiding scratches on the board surface caused by repeated clamping, and improving the integrity of the coating area.

[0017] This invention utilizes a suction cup linkage adsorption mechanism to ensure stable positioning without clamping obstructions. Through the mechanical linkage of guide rollers and insert rods, as the clamping plate opens, a U-shaped push plate is automatically pushed, triggering the suction cup action within the auxiliary clamping block. This allows the bottom suction cup to adhere to the bottom edge of the circuit board, providing stable positioning and fixation for the circuit board without side clamping obstructions, ensuring the stability of the circuit board's position during dust removal and coating processes. This adsorption and flipping action are fully linked, requiring no additional driving components. The structure is compact and reliable, making it particularly suitable for processing thin circuit boards and effectively preventing board surface misalignment and deformation.

[0018] This invention features multi-angle adjustable operation to ensure uniform processing quality. The invention allows for multi-angle rotation adjustment via a drive motor-driven rotating shaft. In the dust removal process, it can be used in conjunction with a dust blower and vacuum cleaner to achieve multi-angle dust removal, effectively removing dust from dead corners of the board surface and improving cleaning efficiency. In the coating and drying processes, the circuit board angle can also be adjusted according to process requirements to ensure uniform coating thickness and consistent drying and curing, thereby improving the stability of product processing quality. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the robotic arm and U-shaped support of the present invention; Figure 3 This is a three-dimensional structural diagram of the cross shaft and the fixing frame of the present invention; Figure 4 This is a three-dimensional structural diagram of the inclined roller and convex cylinder of the present invention; Figure 5 This is a three-dimensional structural diagram of the clamping block and auxiliary clamping block of the present invention; Figure 6 This is a three-dimensional cross-sectional view of the fixed frame of the present invention; Figure 7 This is a three-dimensional structural diagram of the guide roller, cross shaft, and fixed connecting plate of the present invention; Figure 8 This is a three-dimensional cross-sectional view of the auxiliary clamping block of the present invention.

[0020] In the diagram: 1. Coating chamber; 2. Lifting isolation plate; 3. Coating machine; 4. Dust blower; 5. Vacuum cleaner; 6. Horizontal drive rod; 7. Robotic arm; 8. U-shaped bracket; 81. Rotating shaft; 82. Clamping block; 83. Auxiliary clamping block; 84. Connecting plate; 85. Inclined roller; 86. Convex cylinder; 87. Rolling channel; 88. Fixed plate; 9. Drive motor; 91. Worm gear; 92. Worm wheel; 10. Circular slide rail; 1 01. Guide roller; 102. Cross shaft; 103. Fixed frame; 104. L-shaped connecting plate; 105. Bearing; 106. Linkage plate; 107. L-shaped deflection plate; 108. Auxiliary deflection plate; 109. Clamping plate; 1010. Fixed connecting plate; 11. Insert rod; 111. U-shaped push plate; 112. T-slot; 113. Hinge plate; 114. T-shaped push rod; 115. Return spring telescopic rod; 116. Suction cup. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1 to 8 The present invention provides a technical solution: a circuit board surface coating machine for circuit board production, including a coating chamber 1, a dryer installed on the upper left side of the inner wall of the coating chamber 1, a lifting partition 2 installed in the middle of the coating chamber 1 for separating the internal space of the coating chamber 1, a coating machine 3 installed on the upper left side of the inner wall of the coating chamber 1, and a dust blower 4 and a vacuum cleaner 5 installed on the right side of the inner wall of the coating chamber 1, with the vacuum cleaner 5 installed in front of the dust blower 4; A transverse drive rod 6 is installed on the rear side of the inner wall of the coating chamber 1. A robotic arm 7 is installed on the transverse drive rod 6. A U-shaped bracket 8 is installed at the front end of the robotic arm 7. Rotating shafts 81 are inserted on both sides of the U-shaped bracket 8. A drive mechanism is installed on the rotating shafts 81. A clamping block 82 is fixedly connected to the opposite side of the two rotating shafts 81. The clamping side of the clamping block 82 is provided with a protective rubber layer to ensure the stability of the circuit board placed between the two clamping blocks 82. Auxiliary clamping blocks 83 are slidably set on the upper and lower sides of the clamping blocks 82. The two auxiliary clamping blocks 83 are staggered. A connecting plate 84 is fixedly connected to one side of each of the two auxiliary clamping blocks 83. The two connecting plates 84 are symmetrically slidably set on the rotating shafts 81. On the upper and lower sides of the rotating shaft 81, the connecting plate 84 is fixedly connected to the end away from the auxiliary clamping block 83 with inclined rollers 85. On both sides of the inclined rollers 85, there are convex cylinders 86. The two convex cylinders 86 are staggered relative to each other, and a rolling channel 87 is formed between the two convex cylinders 86. The rolling channel 87 is composed of two staggered opposing arc channels and two inclined channels. The two convex cylinders 86 are movably sleeved on the outside of the rotating shaft 81, and the two convex cylinders 86 are connected by a fixing plate 88. The convex cylinder 86 near the U-shaped bracket 8 is fixed on the inside of the U-shaped bracket 8, and the connecting plate 84 can rotate on the inside of the convex cylinder 86 away from the U-shaped bracket 8.

[0023] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 8 As shown, the drive mechanism includes a drive motor 9, which is mounted on a U-shaped bracket 8. A worm gear 91 is fixedly connected to the rotating shaft of the drive motor 9, and a worm wheel 92 meshes with the worm gear 91. The worm wheel 92 is fixedly sleeved on the rotating shaft 81.

[0024] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 8 As shown, an annular slide rail 10 is fixedly sleeved on the outer wall of the convex cylinder 86 away from the U-shaped bracket 8. The inner wall of the annular slide rail 10 is composed of two arc-shaped slide rails and two V-shaped slide rails connected alternately. Two symmetrically arranged guide rollers 101 are slidably connected inside the annular slide rail 10. A cross shaft 102 is installed at one end of the guide roller 101. A fixed frame 103 is movably sleeved on the horizontal axis of the cross shaft 102. Fixed plates 1010 are fixedly connected to opposite sides of the two fixed frames 103. The two fixed plates 1010 are fixed to the front and rear sides of the clamping block 82, respectively. L-shaped connecting plates 104 are fixedly connected to opposite sides of the two fixed frames 103. Bearings 105 are fixedly connected to the two L-shaped connecting plates 104. The inner ring of the bearing 105 is fixed to the end face of the annular slide rail 10. The bearing 105 is coaxial with the annular slide rail 10 to ensure that the fixed frame 103 can rotate stably relative to the annular slide rail 10. The vertical axis of the cross shaft 102 is located inside the fixed frame 103, and both ends of the vertical axis are hinged to a linkage plate 106. An L-shaped deflection plate 107 is hinged to the end of the linkage plate 106 away from the cross shaft 102, and the corner of the L-shaped deflection plate 107 is rotatably connected inside the fixed frame 103. An auxiliary deflection plate 108 is also rotatably connected inside the fixed frame 103, and the auxiliary deflection plate 108 and one of the component plates of the L-shaped deflection plate 107 are arranged parallel to each other. A clamping plate 109 is hinged to one end of both the auxiliary deflection plate 108 and the L-shaped deflection plate 107, and a clamping pad is provided on the clamping side of the clamping plate 109.

[0025] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 8 As shown, two insert rods 11 are inserted into the annular slide rail 10 on the side facing the clamping block 82. One end of the two insert rods 11 is located on the inner wall of the annular slide rail 10, and a U-shaped push plate 111 is fixedly connected to the other end. A T-shaped groove 112 is provided in the auxiliary clamping block 83. A suction cup 116 is installed on the inner wall of the T-shaped groove 112, and the suction end of the suction cup 116 extends to the outside of the auxiliary clamping block 83. A hinge plate 113 is hinged to the control block inside the suction cup 116. A T-shaped push rod 114 is fixedly connected to the end of the hinge plate 113 away from the control block of the suction cup 116. The end of the T-shaped push rod 114 away from the hinge plate 113 extends to the outside of the T-shaped groove 112.

[0026] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 8As shown, a reset spring telescopic rod 115 is fixedly connected to the T-shaped push rod 114, and the end of the reset spring telescopic rod 115 away from the T-shaped push rod 114 is fixed in the T-shaped groove 112. The insertion rod 11 is squeezed by the guide roller 101, which drives the U-shaped push plate 111, which can drive the T-shaped push rod 114 located on the lower side to move, thereby pushing the hinge plate 113 to push the control block in the suction cup 116 to move in the suction cup 116, causing the lower suction cup 116 to be adsorbed at the bottom edge of the circuit board. Conversely, when the guide roller 101 is no longer squeezing one end of the insertion rod 11, the reset spring telescopic rod 115 drives the T-shaped push rod 114 to reset, causing the suction cup 116 to no longer generate an adsorption force on the bottom of the circuit board, making it easier to remove the circuit board later.

[0027] The method of use and advantages of this invention: The working process of this circuit board surface coating machine for circuit board production is as follows: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 8 As shown, when coating the circuit board, the circuit board is first placed between two clamping blocks 82, at which time the bottom surface of the circuit board is in contact with the auxiliary clamping block 83 on the lower side of the two clamping blocks 82. After the circuit board is initially placed, two drive motors 9 run simultaneously, driving the worm gears 91 on them to rotate. This causes the two worm wheels 92 to drive the two rotating shafts 81 to rotate simultaneously. At this time, the two fixed frames 103 and the two connecting plates 84 on the side of the rotating shafts 81 rotate simultaneously. This causes the guide rollers 101 at the end of the cross shaft 102 in the fixed frame 103 to roll from the V-shaped slide area to the arc-shaped slide area in the annular slide rail 10. During this process, the guide rollers 101 and the cross shaft 102 work together to pull the linkage plate 106 to slide in the fixed frame 103, thereby driving the L-shaped deflection plate 107 to deflect. The auxiliary deflection plate 108 deflects simultaneously, pushing the two clamping plates 109 in the same fixed frame 103 to move relative to each other, clamping the left and right sides of the circuit board and ensuring the stability of the circuit board's subsequent rotation. As the rotating shaft 81 continues to rotate, the inclined roller 85 on the connecting plate 84 rolls in the rolling channel 87. When the inclined roller 85 rolls to the inclined channel area of ​​the rolling channel 87, the two connecting plates 84 on the rotating shaft 81 move towards each other at the same time, thereby causing the auxiliary clamping blocks 83 at the ends of the two connecting plates 84 to move out of alignment with each other. After the upper and lower auxiliary clamping blocks 83 rotate 90 degrees, the positions of the upper and lower auxiliary clamping blocks 83 are interchanged, ensuring that the auxiliary clamping block 83 located on the lower side continues to support the bottom of the circuit board. After the rotating shaft 81 completes a full 180-degree rotation, the guide roller 101 rotates again from the arc-shaped slide area to the V-shaped slide area in the annular slide rail 10, causing the clamping plate 109 clamped on the circuit board to separate from the circuit board again, which facilitates the subsequent cleaning of dust and application of conformal coating on the top surface of the circuit board. As the guide roller 101 rotates from the arc-shaped slide area to the V-shaped slide area within the annular slide rail 10, the guide roller 101 presses the insert rod 11, pushing the U-shaped push plate 111 to move and press the lower T-shaped push rod 114. This, in turn, drives the hinge plate 113 to push the control block within the suction cup 116 to move within the suction cup 116, causing the lower suction cup 116 to adhere to the bottom edge of the circuit board, ensuring stability during subsequent cleaning of the upper surface of the circuit board. Next, the blower 4 blows air onto the top surface of the circuit board to remove dust, and the vacuum cleaner 5 collects the blown-off dust. During the cleaning process, the drive motor 9 drives the rotating shaft 81 to rotate slowly, adjusting the angle of the circuit board to achieve blowing and cleaning at different angles, ensuring the quality of dust removal. After the rotating shaft 81 rotates the circuit board 180 degrees again, the circuit board is flipped over and then cleaned, thus completing the cleaning of both sides of the circuit board by the blower 4 and the vacuum cleaner 5. After cleaning, the lifting isolation plate 2 is lowered, and the horizontal drive rod 6 drives the robotic arm 7 and U-shaped bracket 8 to move to the left side of the inner wall of the coating chamber 1. Then the lifting isolation plate 2 is moved up and reset. Then the coating machine 3 applies conformal coating to the top surface of the circuit board. After the top surface is coated, the conformal coating is dried by the dryer in the coating chamber 1. After drying, the drive motor 9 and the rotating shaft 81 work together to flip the circuit board over and apply coating and drying to the other side of the circuit board.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit board surface coating machine for circuit board production, comprising a coating chamber (1), a transverse drive rod (6) installed on the rear side of the inner wall of the coating chamber (1), a robotic arm (7) installed on the transverse drive rod (6), a U-shaped bracket (8) installed at the front end of the robotic arm (7), rotating shafts (81) inserted on both sides of the U-shaped bracket (8), a drive mechanism installed on the rotating shafts (81), and clamping blocks (82) fixedly connected to opposite sides of the two rotating shafts (81), characterized in that: The clamping block (82) has auxiliary clamping blocks (83) on both the upper and lower sides for limiting sliding. The two auxiliary clamping blocks (83) are staggered to alternately support the bottom of the circuit board during the flipping process, and maintain the bottom support of the board surface throughout the process. A connecting plate (84) is fixedly connected to one side of each of the two auxiliary clamping blocks (83). The two connecting plates (84) are symmetrically slidably arranged on the upper and lower sides of the rotating shaft (81). An inclined roller (85) is fixedly connected to the end of the connecting plate (84) away from the auxiliary clamping block (83). The inclined roller (85) has convex cylinders (86) on both sides. The two convex cylinders (86) are staggered relative to each other, and a rolling channel (87) is formed between the two convex cylinders (86). The rolling channel (87) consists of two staggered arc channels and two inclined channels. When the rotating shaft (81) rotates, the connecting plate (84) is driven to translate along the axial direction of the rotating shaft (81) by the path change of the inclined roller (85), and the upper and lower auxiliary clamps (83) are driven to complete the exchange of staggered positions. Both convex cylinders (86) are movably sleeved on the outside of the rotating shaft (81). The two convex cylinders (86) are connected by a fixing plate (88). One of the convex cylinders (86) closer to the U-shaped bracket (8) is fixed inside the U-shaped bracket (8). The connecting plate (84) can rotate inside the convex cylinder (86) away from the U-shaped bracket (8).

2. The circuit board surface coating machine for circuit board production according to claim 1, characterized in that: The drive mechanism includes a drive motor (9), which is mounted on a U-shaped bracket (8). A worm (91) is fixedly connected to the rotating shaft of the drive motor (9), and a worm wheel (92) meshes on the worm (91). The worm wheel (92) is fixedly sleeved on the rotating shaft (81).

3. The circuit board surface coating machine for circuit board production according to claim 1, characterized in that: A ring slide rail (10) is fixedly sleeved on the outer wall of the convex cylinder (86) away from the U-shaped bracket (8). The inner wall of the ring slide rail (10) is composed of two arc-shaped slides and two V-shaped slides connected alternately. Two symmetrically arranged guide rollers (101) are slidably connected inside the annular slide rail (10). A cross shaft (102) is installed at one end of the guide roller (101). A fixed frame (103) is movably sleeved on the horizontal axis of the cross shaft (102). Fixed plates (1010) are fixedly connected to the opposite side of the two fixed frames (103). The two fixed plates (1010) are fixed on the front and rear sides of the clamping block (82) respectively. Two fixed frames (103) are fixedly connected to L-shaped connecting plates (104) on opposite sides. Bearings (105) are fixedly connected to the two L-shaped connecting plates (104). The inner ring of the bearing (105) is fixed on the end face of the annular slide rail (10). The bearing (105) and the annular slide rail (10) are coaxially arranged.

4. A circuit board surface coating machine for circuit board production according to claim 3, characterized in that: The vertical axis of the cross shaft (102) is located inside the fixed frame (103). Both ends of the vertical axis are hinged with linkage plates (106). The end of the linkage plate (106) away from the cross shaft (102) is hinged with an L-shaped deflection plate (107). The corner of the L-shaped deflection plate (107) is rotatably connected inside the fixed frame (103). An auxiliary deflection plate (108) is rotatably connected inside the fixed frame (103). The auxiliary deflection plate (108) and one of the constituent plates of the L-shaped deflection plate (107) are arranged in parallel. A clamping plate (109) is hinged to one end of both the auxiliary deflection plate (108) and the L-shaped deflection plate (107).

5. A circuit board surface coating machine for circuit board production according to claim 3, characterized in that: Two insert rods (11) are inserted into the side of the annular slide rail (10) facing the clamping block (82). One end of the two insert rods (11) is located on the inner wall of the annular slide rail (10), and the other end is fixedly connected to a U-shaped push plate (111). A T-shaped groove (112) is provided in the auxiliary clamping block (83). A suction cup (116) is installed on the inner wall of the T-shaped groove (112), and the suction end of the suction cup (116) extends to the outside of the auxiliary clamping block (83). A hinge plate (113) is hinged on the control block inside the suction cup (116). A T-shaped push rod (114) is fixedly connected to the end of the hinge plate (113) away from the control block of the suction cup (116). The end of the T-shaped push rod (114) away from the hinge plate (113) extends to the outside of the T-shaped groove (112).

6. A circuit board surface coating machine for circuit board production according to claim 5, characterized in that: A reset spring telescopic rod (115) is fixedly connected to the T-shaped push rod (114), and the end of the reset spring telescopic rod (115) away from the T-shaped push rod (114) is fixed in the T-shaped groove (112).

7. A circuit board surface coating machine for circuit board production according to claim 1, characterized in that: A dryer is installed on the upper left side of the inner wall of the coating chamber (1), and a lifting partition plate (2) is installed in the middle of the coating chamber (1) to separate the internal space of the coating chamber (1); A coating machine (3) is installed on the left side of the inner wall of the coating chamber (1), and a dust blower (4) and a vacuum cleaner (5) are installed on the right side of the inner wall of the coating chamber (1). The vacuum cleaner (5) is installed in front of the dust blower (4).

8. A circuit board surface coating machine for circuit board production according to claim 1, characterized in that: The clamping block (82) has a protective rubber layer on its clamping side.

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