Circuit board fixing device for PCB (printed circuit board) welding

Abstract

The invention relates to the technical field of PCB (printed circuit board) welding, and discloses a circuit board fixing device for PCB welding, which comprises a platform, a first track is fixed in the middle of the top of the platform, second tracks are fixed on two sides of the top of the platform, and a double-sided PCB conveying mechanism is arranged between each second track and the first track. A mounting frame is arranged above the platform, and a double-sided PCB welding mechanism is arranged on the mounting frame. The two double-sided PCB conveying mechanisms are arranged, the two double-sided PCB conveying mechanisms can alternately convey two PCBs to one side of the welding mechanism, meanwhile, racks are arranged on the second track, gears are arranged in the double-sided PCB conveying mechanisms, and the gears and the racks are matched with each other to drive the PCBs to turn over. According to the double-sided PCB welding mechanism, the PCB can be moved out of one side of the welding mechanism and turned over after machining of one side is completed, double-station switching feeding and double-sided welding are alternately carried out, the welding efficiency of the double-sided PCB is greatly improved, and the double-sided PCB welding mechanism is suitable for the requirement for welding machining of the double-sided PCB.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB circuit board welding, in particular to a circuit board fixing device for PCB circuit board welding. Background Art

[0002] PCB, also known as printed circuit board (PCB), is an important electronic component that supports and connects electronic components. Because it is manufactured using electronic printing technology, it is called a "printed" circuit board. PCBs have evolved from single-layer to double-sided and multi-layer, and each continues to maintain its own development trends.

[0003] Both sides of a double-sided PCB can be wired and soldered. When components (such as surface-mount components or plug-ins) are mounted on both sides, double-sided soldering is required. Conventional soldering methods for double-sided PCBs involve first securing the PCB. After soldering one side, the PCB is removed, flipped over, and secured again before soldering the second side. Soldering one side of the PCB at a time results in low soldering efficiency, making it difficult to adapt to the demands of double-sided PCB soldering. Summary of the Invention

[0004] The object of the present invention is to provide a circuit board fixing device for PCB circuit board welding, so as to solve the problem of low welding efficiency of double-sided PCB boards proposed in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A circuit board fixing device for PCB circuit board welding includes a platform, a first track fixed in the middle position of the platform top, second tracks fixed on both sides of the platform top, a double-sided PCB board conveying mechanism is provided between each second track and the first track, a mounting frame is provided above the platform, and a double-sided PCB board welding mechanism is provided on the mounting frame. The two double-sided PCB board conveying mechanisms use the first track and the second track to alternately convey double-sided PCB circuit boards to one side of the double-sided PCB board welding mechanism for welding operations. After completing welding on one side, the two double-sided PCB board conveying mechanisms can flip the PCB board over and alternately convey it to one side of the double-sided PCB board welding mechanism for welding on the second side.

[0006] As a further solution of the present invention: a first slide groove is provided on one side of the top of the two second rails, a rack is fixed on the side of the top of the two second rails corresponding to the first slide groove, and a guide frame is fixed at both ends of the top of the two second rails, and a V-shaped guide groove is provided on the end of the guide frame facing the first slide groove, one side of the V-shaped guide groove is horizontally set, and the other side is inclined inward, and the two guide frames on the same side are symmetrically arranged in opposite directions.

[0007] As a further solution of the present invention: second sliding grooves are provided on both sides of the top of the first track, and a through cavity with two ends passing through is provided at the center of the inner wall of the first track. A synchronous belt is provided in the through cavity, and the synchronous belt is connected to the through cavity through the cooperation of multiple synchronous wheels. A second motor is installed on one side outside the through cavity, and one end of the output shaft of the second motor is connected and fixed to one end of the rotating shaft of one of the multiple synchronous wheels.

[0008] As a further solution of the present invention: the double-sided PCB board conveying mechanism includes a fixed frame, the internal part of the fixed frame is rotatably connected to a clamping frame, the double-sided PCB board is clamped in the clamping frame, the front and rear sides of the outside of the fixed frame are respectively provided with a first slider and a second slider, the bottom end of the first slider is slidably connected to the second slide groove, the bottom end of the second slider is slidably connected to the first slide groove, an L-shaped connecting plate is fixed to one side of the bottom of the fixed frame, the bottom end of the L-shaped connecting plate is fixed to one side of the synchronous belt, and the L-shaped connecting plates in the two double-sided PCB board conveying mechanisms are respectively staggered and fixed to the upper and lower sides of the synchronous belt.

[0009] As a further solution of the present invention: the interior of the second slider is slidingly connected to a slide cylinder, and the slide cylinder is rotatably connected to a transmission shaft, both ends of the transmission shaft extend to the outside of the slide cylinder, one end of the transmission shaft is fixed with a gear, and the other end of the transmission shaft is slidably sleeved with a guide cylinder, one end of the guide cylinder rotates through the inner wall of one side of the fixed frame and is fixed to one side of the clamping frame, a gear bracket is fixed to the top of the slide cylinder, a cavity is opened on the side of the second slider corresponding to the gear bracket, the gear bracket is slidably connected in the cavity, one end of the gear bracket extends to the outside of the second slider, and the end of the gear bracket extending to the outside is rotatably connected to the gear, the gear and the rack are arranged correspondingly, and the module of the rack is half of the module of the gear.

[0010] As a further solution of the present invention: a pin is fixed at one end of the top of the gear bracket, and a through groove is provided on the inner wall of the top of the second slider corresponding to the side of the pin, one end of the pin is slidably connected to the through groove, the pin is arranged corresponding to the guide frame, and two positioning grooves are symmetrically provided on one side of the gear bracket, and one side edge of the two positioning grooves is inclined outward toward the center of symmetry, and a first pin is slidably connected to the side of the positioning groove on the outside of the second slider, one end of the first pin is inserted into the positioning groove, and one end of the first pin is sleeved with a first spring, one end of the first spring is fixedly connected to the inner wall of the second slider, and the other end is fixedly connected to the first pin.

[0011] As a further solution of the present invention: an axial hole is provided inside the first slider, and a linkage shaft is rotatably connected in the axial hole, one end of the linkage shaft extends to the outside of the first slider, and one end of the linkage shaft rotates through the inner wall of the fixed frame and is fixed to one side of the clamping frame. A pin hole is provided inside the first slider on the side corresponding to the bottom of the axial hole, and a second pin is slidably connected in the pin hole, and the top of the second pin extends upward into the axial hole. A second spring is sleeved on the second pin, one end of the second spring is fixed on the inner wall of the pin hole, and the other end is fixed on the second pin. The linkage shaft body is symmetrically provided with horizontal embedding grooves on the upper and lower sides corresponding to one end of the second pin, and the top of the second pin is movably abutted against the embedding groove.

[0012] As a further solution of the present invention: two lower support bars are symmetrically fixed to the bottom of the front and rear ends of the clamping frame, and one side of the top of the clamping frame corresponding to the multiple lower support bars is rotatably connected to the upper support bar through a rotating shaft, one end of the multiple upper support bars is threadedly connected to a fastening bolt, and the bottom ends of the multiple fastening bolts are rotatably connected to rubber pads.

[0013] As a further solution of the present invention: the top of the mounting frame is a frame structure, and a screw rod is rotatably connected to the middle position inside the mounting frame. A first motor is installed on the outside of the mounting frame on a side corresponding to the screw rod, and one end of the first motor output shaft is connected and fixed to one end of the screw rod. Guide rods are fixed on both sides of the top frame of the mounting frame corresponding to the screw rod, and a slide is slidably connected to the top frame of the mounting frame. The two guide rods slide through the slide, and the screw rod thread passes through the slide.

[0014] As a further solution of the present invention: electric guide rails are installed on both sides of the bottom of the slide, guide blocks are slidably connected to the two electric guide rails, lifting hydraulic cylinders are installed under the two guide blocks, piston rods are provided on the two lifting hydraulic cylinders, and one end of the two piston rods extends downward to one side of the double-sided PCB board conveying mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, two double-sided PCB board conveying mechanisms are provided. The two double-sided PCB board conveying mechanisms cooperate with a first track, a second track, and a synchronous belt to alternately convey two PCB boards to one side of a welding mechanism. A rack is provided on the second track, and a gear is provided in the double-sided PCB board conveying mechanism. The gear and the rack cooperate with each other to drive the PCB boards to flip over. After processing one side, the PCB board can be moved out of the welding mechanism and flipped over. At the same time, the other unprocessed PCB board can be moved to the welding mechanism for processing the first side. After the first side of the second PCB board is processed, the PCB board is moved out of the welding mechanism, and the flipped first PCB board is moved back to the welding mechanism for welding the second side. The double-station switching loading and double-sided welding are performed alternately, which greatly improves the welding efficiency of the double-sided PCB boards and is suitable for the needs of double-sided PCB board welding processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 This is a first perspective view of the connection between the mounting frame and the platform in the present invention.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0021] Figure 5 This is a second perspective view of the connection between the mounting frame and the platform in the present invention.

[0022] Figure 6 Schematic diagram of the connection between the double-sided PCB board conveying mechanism and the platform in the present invention.

[0023] Figure 7 It is a structural schematic diagram of the double-sided PCB board conveying mechanism in the present invention.

[0024] Figure 8 This is a structural separation diagram of the double-sided PCB board conveying mechanism in the present invention.

[0025] Figure 9 for Figure 8 Enlarged view of point C in the middle.

[0026] Figure 10 for Figure 8 Enlarged view of point D in the middle.

[0027] Figure 11 This is a schematic diagram of the structure of the clamping frame in the double-sided PCB board conveying mechanism.

[0028] Figure numerals: 1- platform, 2- first track, 3- second track, 4- mounting frame, 5- fixed frame, 6- screw rod, 7- guide rod, 8- slide, 9- first motor, 10- first slide, 11- rack, 12- guide frame, 121- V-shaped guide groove, 13- electric guide rail, 14- guide block, 15- lifting hydraulic cylinder, 16- piston rod, 17- welding gun, 18- through cavity, 19- synchronous belt, 20- synchronous wheel, 21- limit switch, 22- second motor, 23- second slide, 24 -Clamping frame, 25-L-shaped connecting plate, 26-first slider, 27-second slider, 28-double-sided PCB board, 29-guide cylinder, 30-slide cylinder, 31-gear bracket, 32-pin, 33-positioning slot, 34-first pin, 35-first spring, 36-transmission shaft, 37-gear, 38-shaft hole, 39-pin hole, 40-linkage shaft, 41-embedded slot, 42-second pin, 43-second spring, 44-lower support bar, 45-upper support bar, 46-rotating shaft, 47-fastening bolt. DETAILED DESCRIPTION

[0029] The following embodiments will be described in detail with reference to the accompanying drawings. Similar or identical parts are denoted by the same reference numerals in the drawings or description. In actual applications, the shape, thickness, or height of each component may be enlarged or reduced. The various embodiments listed in the present invention are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0030] See also Figures 1 to 11In an embodiment of the present invention, a circuit board fixing device for PCB circuit board welding includes a platform 1, a first track 2 is fixed at the middle position of the top of the platform 1, second tracks 3 are fixed on both sides of the top of the platform 1, and a double-sided PCB board conveying mechanism is arranged between each second track 3 and the first track 2. A mounting frame 4 is arranged above the platform 1, and the bottom end of the mounting frame 4 is fixed to the outer side of the two second tracks 3. The double-sided PCB board welding mechanism is arranged on the mounting frame 4. The two double-sided PCB board conveying mechanisms alternately convey the double-sided PCB circuit boards to one side of the double-sided PCB board welding mechanism for welding operation through the cooperation of the first track 2 and the second track 3. After completing the welding of one side, the two double-sided PCB board conveying mechanisms can turn the PCB board over and alternately convey it to one side of the double-sided PCB board welding mechanism again for welding operation on the second side.

[0031] See also Figures 2 to 5 The top of the mounting frame 4 is a frame structure, and the middle position inside it is rotatably connected to a screw rod 6. A first motor 9 is installed on the side of the mounting frame 4 corresponding to the screw rod 6. One end of the output shaft of the first motor 9 is fixedly connected to one end of the screw rod 6. Guide rods 7 are fixed on both sides of the top frame of the mounting frame 4 corresponding to the screw rod 6. A slide 8 is slidably connected to the top frame of the mounting frame 4. The two guide rods 7 slide through the slide 8, and the screw rod 6 threadedly penetrates the slide 8. Electric guide rails 13 are installed on both sides of the bottom of the slide 8. Guide blocks 14 are slidably connected to the two electric guide rails 13. Lifting hydraulic cylinders 15 are installed below the two guide blocks 14. Piston rods 16 are provided on the two lifting hydraulic cylinders 15. One end of the two piston rods 16 extends downward to one side of the double-sided PCB board conveying mechanism. In this embodiment, welding guns 17 are mounted at the bottom ends of both piston rods 16. In other embodiments, if a drilling operation is required on the surface of a PCB board, a drill bit and a motor for driving the drill bit and other components can be mounted at the bottom end of one of the piston rods 16, and a welding gun 17 can be mounted at the bottom end of the other piston rod 16, thereby enabling both drilling and welding operations on the PCB board. A first chute 10 is provided on one side of the top of each of the two second rails 3. A rack 11 is fixed to one side of the top of each of the two second rails 3 corresponding to the first chute 10. A guide frame 12 is fixed to both ends of the top of each of the two second rails 3. A V-shaped guide groove 121 is provided on one end of the guide frame 12 facing the first chute 10. One side of the V-shaped guide groove 121 is horizontally arranged, and the other side is inclined inwardly. The two guide frames 12 on the same side are symmetrically arranged in opposite directions. In this embodiment, when the PCB board is transported to one side of the welding mechanism, the screw rod 6 is rotated by the first motor 9, the screw rod 6 is threadedly connected to the slide 8, and the slide 8 is slidably connected to the two guide rods 7. When the screw rod 6 rotates, it will drive the slide 8 to move back and forth in the frame at the top of the mounting frame 6. At this time, the welding gun 17 located below the slide 8 can move back and forth above the PCB board, and then the guide block 14 is moved left and right by the electric guide rail 13. The guide block 14 will drive the welding gun 17 located below it to move left and right synchronously. After the front, back, left and right positions of the welding gun 17 are adjusted, the lifting hydraulic cylinder 15 is started to move the welding gun 17 downward and gradually approach the point to be welded on the PCB board. After the distance is adjusted, the welding gun 17 is started and the pins of the electronic components on the PCB board are welded.

[0032] See also Figures 6-7 A through cavity 18 with two ends passing through is opened at the center of the inner wall of the first track 2. A synchronous belt 19 is arranged in the through cavity 18. The synchronous belt 19 is connected to the through cavity 18 through the cooperation of multiple synchronous wheels 20. A second motor 22 is installed on one side of the outside of the through cavity 18. One end of the output shaft of the second motor 22 is connected and fixed to one end of the rotating shaft of one of the multiple synchronous wheels 20. The synchronous wheel 20 is driven to rotate by the second motor 22, thereby driving the synchronous belt 19 to move to one end. Limit switches 21 are installed at both ends of the bottom of the through cavity 18, and second slide grooves 23 are opened on both sides of the top of the first track 2. The double-sided PCB board conveying mechanism includes a fixed frame 5, which is rotatably connected to a clamping frame 24 inside the fixed frame 5. The clamping frame 24 clamps a double-sided PCB board 28. A first slider 26 and a second slider 27 are respectively provided on the front and rear sides of the outside of the fixed frame 5. The bottom end of the first slider 26 is slidably connected to the second slide 23, and the bottom end of the second slider 27 is slidably connected to the first slide 10. An L-shaped connecting plate 25 is fixed to one side of the bottom of the fixed frame 5. The bottom end of the L-shaped connecting plate 25 is fixed to one side of the synchronous belt 19. The L-shaped connecting plates 25 in the two double-sided PCB board conveying mechanisms are respectively staggered and fixed to the upper and lower sides of the synchronous belt 19. When the synchronous belt 19 moves toward one end, the two L-shaped connecting plates 25 move in opposite directions, thereby driving the two fixed frames 5 to move synchronously in the opposite directions, so that the PCB boards to be processed can be alternately conveyed to one side of the welding mechanism for processing; In this embodiment, the synchronous belt 19 is driven to move toward one end by the cooperation of the second motor 22 and the synchronous wheel 20. The upper and lower ends of the synchronous belt 19 are respectively connected and fixed to two L-shaped connecting plates 25. The movement directions of the upper and lower ends of the synchronous belt 19 are opposite, thereby driving the two L-shaped connecting plates 25 to move synchronously in the opposite direction. The L-shaped connecting plate 25 is fixedly connected to the fixed frame 5, thereby driving the front and rear fixed frames 5 to move synchronously in the opposite direction. Double-sided PCB boards 28 are provided in both fixed frames 5. The double-sided PCB boards 28 will move synchronously with the fixed frame 5, so that the two double-sided PCB boards 28 to be processed can be alternately sent to one side of the welding mechanism for processing.

[0033] See also Figures 8-9 The interior of the second slider 27 is slidably connected to a slide cylinder 30, and a transmission shaft 36 is rotatably connected to the slide cylinder 30. Both ends of the transmission shaft 36 extend to the outside of the slide cylinder 30. A gear 37 is fixed to one end of the transmission shaft 36, and a guide cylinder 29 is slidably sleeved on the other end of the transmission shaft 36. One end of the guide cylinder 29 rotates through the inner wall of one side of the fixed frame 5 and is fixed to one side of the clamping frame 24. A gear bracket 31 is fixed to the top of the slide cylinder 30. A cavity is opened on one side of the second slider 27 corresponding to the gear bracket 31. The gear bracket 31 is slidably connected to the cavity. One end of the gear bracket 31 extends to the outside of the second slider 27, and the end of the gear bracket 31 extending to the outside is rotatably connected to the gear 37. The gear 37 is correspondingly arranged with the rack 11, and the module of the rack 11 is half the module of the gear 37. When the gear 37 contacts the rack 11, the gear 37 starts to rotate. When the gear 37 completely passes the rack 11, the gear 37 rotates half a circle, that is, the gear 37 rotates 180 degrees. At this time, the clamping frame 24 connected to the gear 37 and the PCB board inside it also rotate 180 degrees, thereby realizing the flipping processing of the PCB board; A pin 32 is fixed to one end of the top of the gear bracket 31, and a through slot is formed on the inner wall of the top of the second slider 27 corresponding to the side of the pin 32. One end of the pin 32 is slidably connected to the through slot, and the pin 32 is correspondingly arranged with the guide frame 12. When the pin 32 moves to one side of the guide frame 12, the pin 32 slides back and forth in the through slot at the top of the second slider 27 under the guidance of the V-shaped guide slot 121. When the pin 32 slides, it drives the transmission shaft 36 and the gear 37 connected thereto to move synchronously, so that the gear 37 and the rack 11 are staggered or located in the same straight line. When the gears and racks are staggered with each other, the gear 37 will not rotate, the clamping frame 24 remains stationary, and the PCB board inside the clamping frame 24 will not rotate and turn over; Two positioning grooves 33 are symmetrically provided on one side of the gear bracket 31. One side of the two positioning grooves 33 is inclined outward toward the symmetrical center. A first pin 34 is slidably connected to one side of the positioning groove 33 corresponding to the outside of the second slider 27. One end of the first pin 34 is inserted into the positioning groove 33. A first spring 35 is sleeved on one end of the first pin 34. One end of the first spring 35 is fixedly connected to the inner wall of the second slider 27, and the other end is fixedly connected to the first pin 34. In the initial stage, the first pin 34 is inserted into one of the positioning grooves 33, and the pin and the positioning groove cooperate with each other to The bracket 31 is temporarily fixed to ensure that the gear 37 is stable and immovable. When the gear bracket 31 slides to one side, one side of the positioning groove 33 will squeeze the first pin 34, causing the first pin 34 to slide outward and compress the first spring 35. When the gear bracket 31 moves into place, the first pin 34 will be located on the other side of the positioning groove 33. At this time, the first spring 35 resets and drives the first pin 34 to be reinserted into the new positioning groove 33. At this time, the pin and the positioning groove cooperate with each other to fix the gear bracket 31 again, so that the gear 37 that has moved can remain stable again.

[0034] See also Figure 8 and Figure 10 , an axis hole 38 is opened inside the first slider 26, and a linkage shaft 40 is rotatably connected in the axis hole 38. One end of the linkage shaft 40 extends to the outside of the first slider 26, and one end of the linkage shaft 40 rotates through the inner wall of the fixed frame 5 and is fixed to one side of the clamping frame 24. A pin hole 39 is opened on the side below the axis hole 38 of the first slider 26. A second pin 42 is slidably connected in the pin hole 39. The top of the second pin 42 extends upward into the axis hole 38. A second spring 43 is sleeved on the second pin 42. One end of the second spring 43 is fixed on the inner wall of the pin hole 39, and the other end is fixed on the second pin 42. The linkage shaft 40 shaft body is symmetrically provided with horizontal embedding grooves 41 on the upper and lower sides corresponding to one end of the second pin 42. The top of the second pin 42 movably abuts against the embedding groove 41. In this embodiment, when the clamping frame 24 is placed horizontally, the top end of the second pin 42 abuts against the embedding groove 41 on the lower side of the linkage shaft 40, and the embedding groove 41 is arranged horizontally. At this time, no sliding occurs between the second pin 42 and the embedding groove 41. At the same time, the second pin 42 applies pressure to the linkage shaft 40 through the second spring 43 to press the linkage shaft 40 tightly, so that the linkage shaft 40 remains stationary. The linkage shaft 40 is fixedly connected to the clamping frame 24. At this time, the clamping frame 24 can also remain stationary, thereby keeping the PCB board stable during the conveying process, and the side of the PCB board to be processed always faces upward; After one side of the PCB board is processed, the synchronous belt 19 drives the PCB board to retract. During the retraction process, the PCB board flips over, driving the linkage shaft 40 to rotate synchronously. When the linkage shaft 40 rotates, the embedded groove 41 at the bottom thereof tilts and squeezes the second pin 42. The second pin 42 retracts into the pin hole 39 and squeezes the second spring 43. When the PCB board is turned over, the linkage shaft 40 also rotates 180 degrees. At this time, the embedded groove 41 at the top of the linkage shaft 40 rotates to the bottom and contacts the second pin 42 again. The second pin 42 is reset upward under the action of the second spring 43 and is again pressed against the embedded groove 41. At this time, the second pin 42 cooperates with this embedded groove 41 to fix and lock the linkage shaft 40 again, so that it will not rotate easily, thereby limiting and fixing the clamping frame 24, so that the turned PCB board can be kept stable again.

[0035] See also Figure 11 Two lower support bars 44 are symmetrically fixed to the bottom of the front and rear ends of the clamping frame 24. One side of the top of the clamping frame 24 corresponding to the multiple lower support bars 44 is rotatably connected to an upper support bar 45 through a rotating shaft 46. One end of the multiple upper support bars 45 is threadedly connected to a fastening bolt 47, and the bottom ends of the multiple fastening bolts 47 are rotatably connected to a rubber pad. Place the PCB board into the clamping frame 24, and the front and rear side edges of the bottom of the PCB board are placed on the multiple lower support bars 44, then rotate the upper support bar 45 so that it is located above the PCB board, and then tighten the fastening bolts 47 so that the bottom end of the bolt is tightly against the top of the PCB board, so that the PCB board can be fixed in the clamping frame 24.

[0036] Working principle (take loading from the left end of the device as an example): Place the double-sided PCB board 28 into the clamping frame 24 and fix the PCB board into the clamping frame 24 by using the upper and lower support bars and the fastening bolts 47. Then, the first motor 9 rotates the synchronous wheel 20 and drives the synchronous belt 19 to move toward one end. When the synchronous belt 19 moves, the front and rear clamping frames 24 move synchronously in the opposite direction. When the clamping frame 24 holding the PCB board moves to one side of the welding mechanism, the other idle clamping frame 24 moves in the opposite direction to the loading end. While the welding mechanism is performing the welding operation on the PCB board, the user can place another PCB board to be welded into this idle clamping frame 24. When one side of a PCB board is welded, the first motor 9 is started again to rotate the synchronous wheel 20 in the reverse direction and drive the synchronous belt 19 to move in the reverse direction. When the synchronous belt 19 moves in the reverse direction, the welded PCB board is driven back to the loading end. During the retraction process, the gear 37 contacts the rack 11 and meshes with the transmission. The gear 37 rotates on its own. When the gear 37 rotates on its own, it drives the transmission shaft 36 to rotate synchronously. When the transmission shaft 36 rotates, it drives the guide cylinder 29 to rotate synchronously. When the guide cylinder 29 rotates, it drives the clamping frame 24 to rotate synchronously. The module of the rack 11 is preset to make the gear 37 rotate 180 degrees. At this time, the clamping frame 24 and its inner The PCB board at the bottom will synchronously rotate 180 degrees, thereby realizing the flipping of the PCB board. After the PCB board is flipped over, the linkage shaft 40 will be tightly fixed by the second pin 42 again, and the linkage shaft 40 will remain stable again. At this time, the clamping frame 24 connected to the linkage shaft 40 and the PCB board inside it will also remain stable again. When the fixed frame 5 is completely moved to the side of the feeding end, the pin 32 will be clamped into the V-shaped guide groove 121 of the guide frame 12 again. Under the guidance of the V-shaped guide groove 121, the pin 32 will move to one side and drive the gear 37 to move to one side synchronously. At this time, the gear 37 and the rack 11 will be staggered with each other in the vertical direction. When the synchronous belt 19 moves in the reverse direction, it will also drive another PCB board that has not been processed to the side of the welding mechanism. The welding mechanism performs welding on this new PCB board. After welding, the first motor 9 is started again to move the first PCB board to the side of the welding mechanism again. At this time, since the gear 37 and the rack 11 are offset in the vertical direction, the gear 37 will not rotate, and the first PCB board will not be flipped again. The unprocessed surface of this PCB board is moved to the side of the welding mechanism for welding. At the same time, when this PCB board moves to the rightmost end of the second track 3, the pin 32 will be locked in the V-shaped guide groove 121 again, thereby driving the gear 37 to move back to its original position. After moving back to its original position, the gear 37 will overlap with the rack 11 again, so that the PCB board can be flipped again during the next transportation of the board. After each flip, the second pin 42 will lock and fix the linkage shaft 40, so that the flipped PCB board can be stabilized again. In summary, the device can perform alternating welding processing on two PCB boards, thereby improving welding efficiency. Moreover, the PCB board can be turned over after processing of each side is completed. The turned-over PCB board can be sent to the welding mechanism again for welding. The double-station switching processing and double-sided processing are carried out simultaneously, and the PCB board welding efficiency is higher. The device is suitable for the welding processing needs of double-sided PCB boards.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0038] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A circuit board fixing device for PCB circuit board welding, comprising a platform (1), characterized in that: A first track (2) is fixed at the middle position of the top of the platform (1), and second tracks (3) are fixed on both sides of the top of the platform (1). A double-sided PCB board conveying mechanism is provided between each of the second tracks (3) and the first track (2). A mounting frame (4) is provided above the platform (1), and a double-sided PCB board welding mechanism is provided on the mounting frame (4). The two double-sided PCB board conveying mechanisms alternately convey the double-sided PCB circuit boards to one side of the double-sided PCB board welding mechanism for welding operation through the coordinated use of the first track (2) and the second track (3). After completing the welding of one side, the two double-sided PCB board conveying mechanisms can turn the PCB board over and alternately convey it to one side of the double-sided PCB board welding mechanism again for welding operation of the second side.

2. The circuit board fixing device for PCB circuit board welding according to claim 1, characterized in that: A first slide groove (10) is provided on one side of the top of each of the two second rails (3), a rack (11) is fixed on one side of the top of each of the two second rails (3) corresponding to the first slide groove (10), and a guide frame (12) is fixed on both ends of the top of each of the two second rails (3), and a V-shaped guide groove (121) is provided on one end of the guide frame (12) facing the first slide groove (10), one side of the V-shaped guide groove (121) is horizontally arranged, and the other side is inclined inwardly, and the two guide frames (12) on the same side are symmetrically arranged in opposite directions.

3. The circuit board fixing device for PCB circuit board welding according to claim 2, characterized in that: A second slide groove (23) is provided on both sides of the top of the first track (2), a through cavity (18) with two ends passing through is provided at the center of the inner wall of the first track (2), a synchronous belt (19) is provided in the through cavity (18), and the synchronous belt (19) is connected to the through cavity (18) through the cooperation of a plurality of synchronous wheels (20), a second motor (22) is installed on one side outside the through cavity (18), and one end of the output shaft of the second motor (22) is connected and fixed to one end of the rotating shaft of one of the plurality of synchronous wheels (20).

4. The circuit board fixing device for PCB circuit board welding according to claim 3, characterized in that: The double-sided PCB board conveying mechanism comprises a fixed frame (5), the interior of the fixed frame (5) is rotatably connected to a clamping frame (24), the clamping frame (24) clamps a double-sided PCB board (28), and the front and rear sides of the exterior of the fixed frame (5) are respectively provided with a first slider (26) and a second slider (27), the bottom end of the first slider (26) is slidably connected to the second slide groove (23), and the bottom end of the second slider (27) is slidably connected to the first slide groove (10), and an L-shaped connecting plate (25) is fixed to one side of the bottom of the fixed frame (5), the bottom end of the L-shaped connecting plate (25) is fixed to one side of the synchronous belt (19), and the L-shaped connecting plates (25) in the two double-sided PCB board conveying mechanisms are respectively staggered and fixed to the upper and lower sides of the synchronous belt (19).

5. The circuit board fixing device for PCB circuit board welding according to claim 4, characterized in that: The interior of the second slider (27) is slidably connected to a slide cylinder (30), and the slide cylinder (30) is rotatably connected to a transmission shaft (36). Both ends of the transmission shaft (36) extend to the outside of the slide cylinder (30), and one end of the transmission shaft (36) is fixed with a gear (37), and the other end of the transmission shaft (36) is slidably sleeved with a guide cylinder (29). One end of the guide cylinder (29) rotates through the inner wall of one side of the fixed frame (5) and is fixed to one side of the clamping frame (24). The top of the slide cylinder (30) is fixed. A gear bracket (31) is provided, a cavity is provided inside the second slider (27) on one side corresponding to the gear bracket (31), the gear bracket (31) is slidably connected in the cavity, one end of the gear bracket (31) extends to the outside of the second slider (27), and the end of the gear bracket (31) extending to the outside is rotatably connected to the gear (37), the gear (37) is arranged corresponding to the rack (11), and the module of the rack (11) is half the module of the gear (37).

6. The circuit board fixing device for PCB circuit board welding according to claim 5, characterized in that: A pin (32) is fixed to one end of the top of the gear bracket (31), and a through slot is provided on the inner wall of the top of the second slider (27) corresponding to one side of the pin (32). One end of the pin (32) is slidably connected to the through slot. The pin (32) is arranged corresponding to the guide frame (12). Two positioning slots (33) are symmetrically provided on one side of the gear bracket (31). One side of the two positioning slots (33) is inclined outward toward the symmetry center. A first pin (34) is slidably connected to one side of the positioning slot (33) on the outside of the second slider (27). One end of the first pin (34) is inserted into the positioning slot (33). One end of the first pin (34) is sleeved with a first spring (35). One end of the first spring (35) is fixedly connected to the inner wall of the second slider (27), and the other end is fixedly connected to the first pin (34).

7. The circuit board fixing device for PCB circuit board welding according to claim 4, characterized in that: An axial hole (38) is provided inside the first slider (26), and a linkage shaft (40) is rotatably connected in the axial hole (38). One end of the linkage shaft (40) extends to the outside of the first slider (26), and one end of the linkage shaft (40) is rotated through the inner wall of the fixing frame (5) and is fixed to one side of the clamping frame (24). A pin hole (39) is provided inside the first slider (26) on a side corresponding to the lower side of the axial hole (38), and a second pin (42) is slidably connected in the pin hole (39). ), the top end of the second pin (42) extends upward into the shaft hole (38), a second spring (43) is sleeved on the second pin (42), one end of the second spring (43) is fixed to the inner wall of the pin hole (39), and the other end is fixed to the second pin (42), the linkage shaft (40) is symmetrically provided with a horizontal embedding groove (41) on the upper and lower sides corresponding to one end of the second pin (42), and the top end of the second pin (42) is movably abutted in the embedding groove (41).

8. The circuit board fixing device for PCB circuit board welding according to claim 1, characterized in that: Two lower support bars (44) are symmetrically fixed to the bottom of the front and rear ends of the clamping frame (24), and one side of the top of the clamping frame (24) corresponding to the multiple lower support bars (44) is rotatably connected to an upper support bar (45) through a rotating shaft (46), and one end of the multiple upper support bars (45) is threadedly connected to a fastening bolt (47), and the bottom ends of the multiple fastening bolts (47) are rotatably connected to a rubber pad.

9. The circuit board fixing device for PCB circuit board welding according to claim 1, characterized in that: The top of the mounting frame (4) is a frame structure, and a screw rod (6) is rotatably connected to the middle position inside the mounting frame (4). A first motor (9) is installed on the outside of the mounting frame (4) at a side corresponding to the screw rod (6). One end of the output shaft of the first motor (9) is connected and fixed to one end of the screw rod (6). Guide rods (7) are fixed on both sides of the top frame of the mounting frame (4) corresponding to the screw rod (6). A slide (8) is slidably connected to the top frame of the mounting frame (4). The two guide rods (7) both slide through the slide (8), and the screw rod (6) is threaded through the slide (8).

10. The circuit board fixing device for PCB circuit board welding according to claim 9, characterized in that: Electric guide rails (13) are installed on both sides of the bottom of the slide (8), and guide blocks (14) are slidably connected to the two electric guide rails (13). A lifting hydraulic cylinder (15) is installed below the two guide blocks (14), and piston rods (16) are provided on the two lifting hydraulic cylinders (15). One end of the two piston rods (16) extends downward to one side of the double-sided PCB board conveying mechanism.

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