A PCBA processing spot welding device

Abstract

The invention relates to the technical field of PCBA board processing, in particular to a PCBA processing spot welding device, comprising a fixing frame, a fixing mechanism capable of fixing the PCBA board is fixedly installed on the inner wall of the fixing frame, a moving mechanism capable of adjusting multiple degrees of freedom is fixedly installed on the inner top of the fixing frame, an electric retracting arm is fixedly installed on the lower end of the moving mechanism, a fixing pipe is fixedly installed on the output end of the electric retracting arm, a welding mechanism capable of welding the PCBA board is rotatably installed inside the fixing pipe, two groups of conveying mechanisms capable of conveying tin bars to the welding mechanism are also fixedly installed on the output end of the electric retracting arm, tin liquid flows to the inside of the funnel through the guide pipe, and drips onto the outer surface of the PCBA board through the guide cone, the electric retracting arm retracts upward, a torsion spring above the welding pipe resets the welding pipe, the welding pipe drives the tin liquid box to reset, the high-temperature metal block is high temperature, and the welding mounting block also has a high temperature, which can keep the tin liquid inside the tin liquid box warm, and can weld the welding position of the PCBA board within a specified range.

Description

Technical Field

[0001] The invention relates to the technical field of PCBA board processing, in particular to a PCBA processing spot welding device. Background Art

[0002] PCBA board is the actual circuit board. The main base material is generally classified according to the insulating part of the substrate. Common raw materials are bakelite, fiberglass board, and various plastic boards. The main processing process of PCBA board is generally to integrate parts on the PCB board through SMT and DIP.

[0003] The welding process of components on the PCBA board is an important step in the processing of the PCBA board. The components can be fixed on the PCBA board through the spot welding mechanism. When the spot welding equipment is in use, the high-temperature joint needs to be close to the spot welding part of the PCBA board, and the tin bar needs to be close to the high-temperature joint to make the tin bar liquefy and drip on the welding part of the PCBA board. The tin liquid may splash out when it drips, causing damage to the PCBA board, and it is troublesome to fix the PCBA board with the traditional spot welding device.

[0004] The Chinese patent discloses a spot welding device for PCBA processing (publication number CN105921870A), which includes a discharge tray, a workpiece bearing mechanism, a feeding mechanism, a conveying mechanism and a spot welding machine; the discharge tray is rotated by the power provided by the discharge rotating cylinder, the working surface of the discharge tray is parallel to the horizontal plane, and a workpiece bearing mechanism is provided on the working surface of the discharge tray; the workpiece bearing mechanism includes a workpiece support and a workpiece positioning column, and multiple workpiece supports are distributed on the discharge tray around the rotation center of the discharge tray, and multiple groups of workpiece positioning columns are vertically provided on the upper surface of each workpiece support, and each group of workpiece positioning columns are symmetrically set. This patent is arranged with the discharge tray as the center to reduce the space occupancy of the overall process; because the processing technology of the entire spot welding device is to spot weld two workpieces after superposition, the running track of the workpiece support on the discharge tray and the feeding track of another workpiece are just matched to achieve this process requirement, so this design can cleverly use the relationship between each mechanism to achieve this purpose.

[0005] When the above scheme is used, the PCBA board is fixed by clamping in the traditional welding mode, but the staff needs to manually adjust the position for fixing when placing the PCBA, which consumes time. In the traditional welding method, the tin bar is simply melted into tin liquid through a high-temperature joint and dripped on the interface of the PCBA board, which may cause the splashing of tin liquid to damage the PCBA board. In order to solve the problem of slow fixing time of the PCBA board and possible damage to the PCBA board in the traditional welding method of the PCBA board, we propose a PCBA processing spot welding device. Summary of the invention

[0006] The object of the present invention is to provide a PCBA processing spot welding device to solve the problems raised in the above background technology.

[0007] A PCBA processing spot welding device comprises a fixing frame, wherein a fixing mechanism capable of fixing a PCBA board is fixedly installed on the inner wall of the fixing frame, a moving mechanism capable of adjusting with multiple degrees of freedom is fixedly installed on the inner top of the fixing frame, and an electric retracting arm is fixedly installed on the lower end of the moving mechanism, a fixing tube is fixedly installed on the output end of the electric retracting arm, a welding mechanism capable of welding the PCBA board is rotatably installed inside the fixing tube, and two groups of conveying mechanisms capable of conveying tin bars to the welding mechanism are also fixedly installed on the output end of the electric retracting arm.

[0008] As a further embodiment of the present invention, the moving mechanism includes a vertical motor, which is fixedly mounted on the inner wall of a fixed frame. The inner wall of the fixed frame is rotatably connected to a vertical threaded rod, the output end of the vertical motor is fixedly connected to the vertical threaded rod, the top end of the fixed frame is slidably connected to a moving plate, and the outer surface of the vertical threaded rod is threadedly connected to the moving plate.

[0009] As a further feature of the present invention, a transverse motor is fixedly installed on the side end of the movable plate, a transverse threaded rod is rotatably connected to the bottom of the movable plate, the output end of the transverse motor is fixedly connected to the transverse threaded rod, the electric retractable arm is slidably connected to the bottom of the movable plate, and the outer surface of the transverse threaded rod is threadedly connected to the electric retractable arm.

[0010] As a further feature of the present invention, the fixing mechanism comprises two groups of slide plates, and the slide plates are slidably mounted on the inner wall of the fixing frame, and one end of the two groups of slide plates close to each other is rotatably connected to two groups of telescopic tubes and abutment arms.

[0011] As a further feature of the present invention, one end of the telescopic tube away from the slide is rotatably connected to the abutment arm, racks are fixedly connected to the side walls of the two slides, and the two racks are not at the same height, an electric telescopic arm is fixedly installed on the inner wall of the fixed frame, a gear is rotatably connected to the inner wall of the fixed frame, the gear and the rack are meshed with each other, an output end of the electric telescopic arm is fixedly connected to a connecting block, and an end of the connecting block away from the electric telescopic arm is fixedly connected to one of the sets of racks.

[0012] As a further embodiment of the present invention, the welding mechanism includes two groups of welding mounting blocks, the upper end surfaces of the welding mounting blocks are fixedly connected to the output end of the electric retracting arm, two groups of high-temperature metal blocks are fixedly connected between the two groups of welding mounting blocks, leakage holes are provided inside the high-temperature metal blocks, the outer surfaces of the welding mounting blocks are slidably connected to welding tubes, and two groups of tin liquid boxes for collecting the melted tin liquid are fixedly installed on the outer surfaces of the welding tubes.

[0013] As a further feature of the present invention, two groups of abutment rods are fixedly connected to the outer surface of the welding tube, two groups of tracks are opened inside the fixed tube, the outer surfaces of the abutment rods abut against the inner walls of the tracks, an abutment spring is fixedly connected to the bottom of the welding tube, the end of the abutment spring away from the welding tube is fixedly connected to a sleeve ring, the upper end surface of the welding tube is fixedly connected to a torsion spring for resetting the welding tube, the end of the torsion spring away from the welding tube is fixedly connected to the output end of the electric retraction arm, and the torsion spring is sleeved on the outer surface of the welding mounting block.

[0014] As a further feature of the present invention, the conveying mechanism includes a fixed plate, a conveying motor is fixedly mounted on the upper surface of the fixed plate, a first clamping wheel is fixedly connected to the output end of the conveying motor, two groups of fixed plates are fixedly mounted on the output end, a second clamping wheel is rotatably connected to the upper surface of the fixed plate, and the second clamping wheel abuts against the first clamping wheel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the present invention is used, the high temperature of the high-temperature metal block will melt the tin bar into tin liquid, which will then flow to the inside of the funnel through the guide tube and flow on the outer surface of the PCBA board through the guide cone. When welding is completed, the electric retracting arm will retract upward. When the sleeve flow ring leaves the PCBA board, the torsion spring above the welding tube will reset the welding tube, and the welding tube will drive the tin liquid box to reset. Because there is still tin liquid in the tin liquid box after welding is completed, the tin liquid box will pass through a cleaning steel brush after it is reset. The cleaning steel brush can scrape one end of the tin liquid box to remove excess tin liquid. After resetting, because the high-temperature metal block is high temperature, the welding mounting block will also have a high temperature. Therefore, after the tin liquid box is reset, it will be in contact with the welding mounting block, so it can have a heat-insulating effect on the tin liquid inside the tin liquid box, and the welding of the PCBA board can be performed within a specified range without causing tin liquid to splash.

[0017] 2. When the present invention is used, the electric telescopic arm is started, and the electric telescopic arm drives the rack to move through the connecting block, and the rack drives another set of racks to move through the gear, so the two sets of slides can move from opposite directions, and the two sets of slides will drive the abutment arms to move in opposite directions. When the abutment wheel abuts against the edge of the PCBA board, the abutment wheel will rotate, and the abutment arm will rotate. Because the abutment arm is ninety degrees, the four abutment arms can fix a square PCBA board, and can also fix a circular PCBA board. It can fix two shapes of PCBA boards, which is diverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of a PCBA processing spot welding device.

[0019] Figure 2It is a structural schematic diagram of a moving mechanism in a PCBA processing spot welding device;

[0020] Figure 3 It is a structural schematic diagram of a fixing mechanism in a PCBA processing spot welding device;

[0021] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0022] Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0023] Figure 6 This is a schematic diagram of the internal structure of a telescopic tube in a PCBA processing spot welding device;

[0024] Figure 7 It is a schematic diagram of the position structure of an electric retractable arm in a PCBA processing spot welding device;

[0025] Figure 8 It is a schematic diagram of the position structure of a conveying mechanism in a PCBA processing spot welding device;

[0026] Fig. 9 It is a schematic diagram of the welding mechanism structure in a PCBA processing spot welding device;

[0027] Fig.10 This is a schematic diagram of the internal structure of a fixed tube in a PCBA processing spot welding device;

[0028] Fig.11 This is a schematic diagram of the position structure of a guide tube in a PCBA processing spot welding device;

[0029] Fig.12 It is a schematic diagram of the position structure of a funnel in a PCBA processing spot welding device;

[0030] Fig.13 This is a disassembled diagram of the welding mechanism structure in a PCBA processing spot welding device.

[0031] In the figure: 1. Electric telescopic rod; 2. Fixed frame; 3. Vertical threaded rod; 4. Moving plate; 5. Vertical motor; 6. Electric retractable arm; 7. Horizontal threaded rod; 8. Horizontal motor; 9. Vertical slide bar; 10. Abutment wheel; 11. Slide plate; 12. Placement area; 13. Electric telescopic arm; 14. Rack; 15. Connecting block; 16. Gear; 17. Horizontal slide bar; 18. Telescopic tube; 19. Abutment arm; 20. Fixed rod; 21. Telescopic spring; 22. Mounting tube; 23. Fixed tube; 24. Tin liquid Box; 25, abutment rod; 26, welding mounting block; 27, cleaning steel brush; 28, high-temperature metal block; 29, welding pipe; 30, guide pipe; 31, torsion spring; 32, track; 33, tool box; 34, funnel; 35, guide cone; 36, abutment spring; 37, sleeve flow ring; 38, recovery wheel; 39, rubber pull tube; 40, conveying motor; 41, first clamping wheel; 42, second clamping wheel; 101, moving mechanism; 201, fixing mechanism; 301, welding mechanism; 401, conveying mechanism. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figure 1 , 2 As shown in Figures 8 and 10, in an embodiment of the present invention, a PCBA processing spot welding device includes a fixing frame 2, a fixing mechanism 201 capable of fixing a PCBA board is fixedly installed on the inner wall of the fixing frame 2, a moving mechanism 101 with multiple degrees of freedom is fixedly installed on the top of the inner part of the fixing frame 2, and an electric retractable arm 6 is fixedly installed on the lower end of the moving mechanism 101, the position of the electric retractable arm 6 can be adjusted by the moving mechanism 101, a fixing tube 23 is fixedly installed on the output end of the electric retractable arm 6, and a welding mechanism 301 capable of welding the PCBA board is rotatably installed inside the fixing tube 23 The output end of the electric retractable arm 6 is also fixedly installed with two sets of conveying mechanisms 401 that can convey tin bars to the welding mechanism 301. A tool box 33 is fixedly installed below the fixed frame 2, and the upper end of the tool box 33 is fixedly connected with a plurality of electric telescopic rods 1 that can drive the fixed frame 2 to move up and down. Specifically, the output end of the electric telescopic rod 1 is fixedly connected to the bottom end of the fixed frame 2. The electric telescopic rod 1 can adjust the height of the fixed frame 2, which is convenient for the staff to adjust the working height suitable for themselves. The tool box 33 can store the tools needed for work, which is convenient to take at any time, thereby improving the work efficiency. Please refer to Figure 3The inner wall of the fixing frame 2 is provided with a placement area 12, through which the staff can be conveniently reminded to place the PCBA board in the correct position.

[0034] Example 2: Please refer to Figure 2 As shown, based on Example 1, the moving mechanism 101 includes a vertical motor 5, which is fixedly installed on the inner wall of the fixed frame 2, and the inner wall of the fixed frame 2 is rotatably connected with a vertical threaded rod 3, the output end of the vertical motor 5 is fixedly connected to the vertical threaded rod 3, and the outer surface of the vertical threaded rod 3 is threadedly connected to the moving plate 4, the top end of the fixed frame 2 is slidably connected with the moving plate 4, the inner wall of the fixed frame 2 is fixedly connected with two groups of vertical sliding rods 9, and the outer surface of the vertical sliding rod 9 is slidably connected with the moving plate 4. Specifically, the vertical sliding rod 9 can guide the moving plate 4. Since the outer surface of the vertical sliding rod 9 is in the shape of a cylinder, when the moving plate 4 slides on the outer surface of the vertical sliding rod 9, the friction force of the moving plate 4 on the vertical sliding rod 9 can be reduced when the moving plate 4 moves, and the side end of the moving plate 4 is fixedly installed with a horizontal motor 8 (for details, please refer to Figure 2 , the transverse motor 8 is fixedly installed on the right end of the moving plate 4), the bottom of the moving plate 4 is rotatably connected with a transverse threaded rod 7, the output end of the transverse motor 8 is fixedly connected to the transverse threaded rod 7, the electric retracting arm 6 is slidably installed on the bottom of the moving plate 4, the outer surface of the transverse threaded rod 7 is threadedly connected to the electric retracting arm 6, two groups of transverse sliding rods 17 are fixedly connected to the bottom of the moving plate 4, the outer surface of the transverse sliding rod 17 is slidably connected to the electric retracting arm 6, the working principle and function of the transverse sliding rod 17 are the same as those of the vertical sliding rod 9, and no further details are given here.

[0035] See also Figure 3 , 4As shown in , 5 and 6, the fixing mechanism 201 includes two groups of slide plates 11, and the slide plates 11 are slidably mounted on the inner wall of the fixing frame 2, and the inner wall of the fixing frame 2 is fixedly connected with two groups of fixing rods 20 that can limit the sliding of the slide plates 11, and the outer surface of the fixing rod 20 is slidably connected with the slide plates 11. When the slide plates 11 move, they can move along the outer surface of the fixing rod 20, which can play a guiding role, and the cylindrical shape can well reduce the friction force. The ends of the two groups of slide plates 11 that are close to each other are rotatably connected with two groups of telescopic tubes 18 and abutment arms 19, and the side of the abutment arms 19 away from the slide plates 11 is rotatably connected with two groups of abutment wheels 10 that can align the PCBA board, and the outer surface of the abutment wheel 10 is set to a curved surface. When the PCBA board abuts against the abutment wheel 10, the abutment arm 19 will be abutted by the PCBA board. When the abutment arm 19 rotates, the outer surface of the abutment wheel 10 abuts against the PCBA board and rotates. The abutment wheel 10 can well reduce the friction on the PCBA board, and the curved surface on the outer surface of the abutment wheel 10 can abut against the edge of the PCBA board. Since the outer surface of the curved surface is provided with a rubber sleeve, when the PCBA board is fixed, because the rubber sleeve is made of rubber material, and the rubber material has elasticity, the squeezing of the PCBA board by the abutment wheel 10 can be reduced to avoid damage to the PCBA board. The end of the telescopic tube 18 away from the slide plate 11 is rotatably connected to the abutment arm 19, and a telescopic spring 21 for resetting the telescopic tube 18 is fixedly installed inside the telescopic tube 18. Racks 14 are fixedly connected to the side walls of the two slide plates 11, and the two racks 14 are not at the same height. For details, please refer to Figure 4 , two racks 14 are distributed up and down, an electric telescopic arm 13 is fixedly installed on the inner wall of the fixed frame 2, and a connecting block 15 is fixedly connected to the output end of the electric telescopic arm 13, and the end of the connecting block 15 away from the electric telescopic arm 13 is fixedly connected to one set of racks 14. For details, please refer to Figure 4 The connecting block 15 is connected to the rack 14 located above. The connecting block 15 can well fix the output end of the electric telescopic arm 13 with one set of racks 14 to avoid the obstruction of parts or obstacles on the upper end surface of the fixing frame 2. The inner wall of the fixing frame 2 is rotatably connected with a gear 16, and the gear 16 and the rack 14 are meshed with each other.

[0036] See also Fig. 9 , 10As shown in , 11 and 12, the welding mechanism 301 includes two groups of welding mounting blocks 26 (specifically, the welding mounting blocks 26 are symmetrically released), the upper end surface of the welding mounting block 26 is fixedly connected to the output end of the electric retracting arm 6, and two groups of high-temperature metal blocks 28 are fixedly connected on both sides of the welding mounting block 26. Specifically, a cleaning steel brush 27 is fixedly connected to one end of the high-temperature metal block 28 away from the welding mounting block 26. The cleaning steel brush 27 can remove the tin liquid on the inner wall of the high-temperature metal block 28 when the high-temperature metal block 28 rotates. The inner wall of the high-temperature metal block 28 is provided with a leakage hole. Specifically, The outer surface of the leakage hole is fixedly connected with a guide tube 30 for guiding the melted tin liquid. The guide tube 30 can guide the melted tin liquid to prevent the tin liquid from splashing. The outer surfaces of the two groups of welding mounting blocks 26 are slidably connected with welding tubes 29. The outer surfaces of the welding tubes 29 are fixedly installed with two groups of tin liquid boxes 24 for collecting the melted tin liquid. The outer surface of the welding tube 29 is fixedly connected with two groups of abutment rods 25, and the inner wall of the fixed tube 23 is provided with two groups of tracks 32. The outer surface of the abutment rod 25 abuts against the inner wall of the track 32. A funnel 34 is fixedly connected between the two groups of welding mounting blocks 26. A guide cone 35 for guiding the melted tin liquid is fixedly connected to the bottom of the funnel 34. When the tin liquid flows into the funnel 34 through the guide pipe 30, because the funnel 34 is in a conical shape, the tin liquid will flow to the outer surface of the guide cone 35 through the funnel 34 again. When the tin liquid flows to the outer surface of the guide cone 35, it will adhere to the outer surface of the guide cone 35, and then drip from the bottom of the guide cone 35 onto the outer surface of the PCBA board. An abutment spring 36 is fixedly connected to the bottom of the welding tube 29, and a sleeve flow ring 3 is fixedly connected to the end of the abutment spring 36 away from the welding tube 29. 7. When the welding tube 29 moves downward and abuts against the PCBA board, the abutting sleeve flow ring 37 contacts it first. The sleeve flow ring 37 can better abut the contact position of the PCBA board because the sleeve flow ring 37 is a circular ring design, which can frame the tin liquid to prevent the tin liquid from diffusing on the PCBA board during welding, thereby damaging the PCBA board. The upper end surface of the welding tube 29 is fixedly connected with a torsion spring 31 that can reset the welding tube 29. The end of the torsion spring 31 away from the welding tube 29 is fixedly connected to the output end of the electric retractable arm 6, and the torsion spring 31 is sleeved on the outer surface of the welding mounting block 26.

[0037] See also Figure 7 , 8As shown, the conveying mechanism 401 includes a fixed plate, a conveying motor 40 is fixedly installed on the upper end surface of the fixed plate, a first clamping wheel 41 is fixedly connected to the output end of the conveying motor 40, a second clamping wheel 42 is rotatably connected to the upper end surface of the fixed plate, the second clamping wheel 42 and the first clamping wheel 41 abut against each other, a rubber pull tube 39 for guiding the tin bar is arranged above the first clamping wheel 41, the outer surface of the rubber pull tube 39 is fixedly connected to the fixed plate, and a mounting tube 22 is fixedly connected to the lower end surface of the fixed plate, and the mounting tube 22 is away from the fixed plate. The end is fixedly connected to the tin liquid box 24, and the end surface of the movable plate 4 is rotatably connected to a recovery wheel 38 for storing the tin bar to be wound. When the tin bar is pulled by the second clamping wheel 42 and the first clamping wheel 41, the tin bar will shake when it is pulled to prevent the tin bar from being entangled and damaged by contact with the outside world. The rubber pull tube 39 and the mounting tube 22 can limit and protect the tin bar, and the material of the mounting tube 22 and the rubber pull tube 39 is also rubber material, which has better elasticity and will not be damaged when pulled.

[0038] When the present invention is used, the staff places the PCBA board on the placement area 12, and then starts the electric telescopic arm 13. The electric telescopic arm 13 drives the rack 14 to move through the connecting block 15, and the rack 14 drives another set of racks 14 to move through the gear 16, so the two sets of slides 11 can move from opposite directions, and the two sets of slides 11 will drive the abutment arms 19 to move in opposite directions. When the abutment wheel 10 abuts against the edge of the PCBA board, the abutment wheel 10 will rotate, and the abutment arm 19 will rotate. Because the abutment arm 19 is ninety degrees, the four abutment arms 19 can fix a square PCBA board or a circular PCBA board. When the PCBA board needs to be disassembled, the two sets of slides 11 are moved in opposite directions. When the abutment wheel 10 leaves the abutment against the PCBA board, the telescopic spring 21 inside the telescopic tube 18 will reset the telescopic tube 18, and the telescopic tube 18 will pull the abutment arm 19 to reset.

[0039] When the PCBA board needs to be welded, the vertical motor 5 is started, the vertical motor 5 drives the vertical threaded rod 3 to rotate, and the vertical threaded rod 3 drives the movable plate 4 to move forward and backward. At this time, the electric retractable arm 6 is also driven by the movable plate 4 to move left and right. When the electric retractable arm 6 needs to be started forward and backward, the transverse motor 8 is started, the transverse motor 8 drives the transverse threaded rod 7 to rotate, and the transverse threaded rod 7 drives the electric retractable arm 6 to move left and right, thereby realizing the multi-directional movement of the electric retractable arm 6;

[0040] When the electric retracting arm 6 moves downward, the electric retracting arm 6 will drive the welding mounting block 26 and the welding tube 29 to move downward. When the welding tube 29 moves downward, the sleeve flow ring 37 abuts against the outer surface of the PCBA board, and the sleeve flow ring 37 is squeezed, so that the abutting spring 36 is squeezed by the sleeve flow ring 37. At this time, the electric retracting arm 6 will drive the welding tube 29 to continue to move downward, and the abutting rod 25 on the welding tube 29 will slide along the inner wall of the track 32, and then rotate, and the welding tube 29 will rotate ninety degrees. When the welding tube 29 rotates ninety degrees , the inside of the tin liquid box 24 will be connected to the leakage hole on the high-temperature metal block 28, and the conveying motor 40 is started at this time, and the conveying motor 40 drives the first clamping wheel 41 to rotate, and the first clamping wheel 41 drives the second clamping wheel 42 to rotate. Because when installing the tin bar, it is necessary to wrap the tin bar around the recovery wheel 38, and the tin bar will pass through the installation tube 22 and the rubber pulling tube 39, and the outer surface of the tin bar will abut between the first clamping wheel 41 and the second clamping wheel 42. When the first clamping wheel 41 drives the second clamping wheel 42 to rotate, the pulling of the tin bar can be achieved, because the first clamping wheel 41 and the second clamping wheel 42 are connected. The second clamping wheel 42 is made of rubber, so it will clamp the tin bar tightly. Because the tin bar will pass through the inside of the installation tube 22 and lead to the inside of the tin liquid box 24, when the tin liquid box 24 drives the tin bar to contact the high-temperature metal block 28, the high temperature of the high-temperature metal block 28 will melt the tin bar into tin liquid, and then flow to the inside of the funnel 34 through the guide tube 30, and then flow on the outer surface of the PCBA board through the guide cone 35. When the welding is completed, the electric retracting arm 6 retracts upward, and when the sleeve flow ring 37 leaves the PCBA board, the torsion spring 31 above the welding tube 29 will press the welding tube 29 During resetting, the welding tube 29 will drive the tin liquid box 24 to reset. Because there is still tin liquid inside the tin liquid box 24 after welding is completed, the tin liquid box 24 will pass through the cleaning steel brush 27 after it is reset. The cleaning steel brush 27 can scrape one end of the tin liquid box 24 to remove excess tin liquid. After the tin liquid box 24 is reset, because the high-temperature metal block 28 is high temperature, the welding mounting block 26 will also have a high temperature. Therefore, after the tin liquid box 24 is reset, it will be in contact with the welding mounting block 26, and it can keep the tin liquid inside the tin liquid box 24 warm.

[0041] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PCBA processing spot welding device, comprising a fixing frame (2), characterized in that: A fixing mechanism (201) capable of fixing a PCBA board is fixedly mounted on the inner wall of the fixing frame (2); a moving mechanism (101) capable of adjusting with multiple degrees of freedom is fixedly mounted on the inner top of the fixing frame (2); an electric retractable arm (6) is fixedly mounted on the lower end of the moving mechanism (101); a fixing tube (23) is fixedly mounted on the output end of the electric retractable arm (6); a welding mechanism (301) capable of welding a PCBA board is rotatably mounted inside the fixing tube (23); and two groups of conveying mechanisms (401) capable of conveying tin bars to the welding mechanism (301) are also fixedly mounted on the output end of the electric retractable arm (6); The welding mechanism (301) comprises two groups of welding mounting blocks (26), the upper end surfaces of the welding mounting blocks (26) being fixedly connected to the output end of the electric retracting arm (6), two groups of high-temperature metal blocks (28) being fixedly connected between the two groups of welding mounting blocks (26), the high-temperature metal blocks (28) being provided with leakage holes inside, the outer surfaces of the welding mounting blocks (26) being slidably connected to welding tubes (29), and the outer surfaces of the welding tubes (29) being fixedly mounted with two groups of tin liquid boxes (24) for collecting melted tin liquid; Two groups of abutment rods (25) are fixedly connected to the outer surface of the welding tube (29); two groups of tracks (32) are provided inside the fixed tube (23); the outer surfaces of the abutment rods (25) abut against the inner walls of the tracks (32); an abutment spring (36) is fixedly connected to the bottom of the welding tube (29); an end of the abutment spring (36) away from the welding tube (29) is fixedly connected to a sleeve ring (37); an upper end surface of the welding tube (29) is fixedly connected to a torsion spring (31) capable of resetting the welding tube (29); an end of the torsion spring (31) away from the welding tube (29) is fixedly connected to an output end of an electric retractable arm (6); and the torsion spring (31) is sleeved on the outer surface of the welding mounting block (26).

2. The PCBA processing spot welding device according to claim 1, characterized in that: The moving mechanism (101) comprises a vertical motor (5), the vertical motor (5) being fixedly mounted on the inner wall of a fixing frame (2), the inner wall of the fixing frame (2) being rotatably connected to a vertical threaded rod (3), the output end of the vertical motor (5) being fixedly connected to the vertical threaded rod (3), the top end of the interior of the fixing frame (2) being slidably connected to a moving plate (4), the outer surface of the vertical threaded rod (3) being threadedly connected to the moving plate (4).

3. The PCBA processing spot welding device according to claim 2, characterized in that: A transverse motor (8) is fixedly mounted on the side end of the movable plate (4); a transverse threaded rod (7) is rotatably connected to the bottom of the movable plate (4); an output end of the transverse motor (8) is fixedly connected to the transverse threaded rod (7); the electric retractable arm (6) is slidably connected to the bottom of the movable plate (4); and an outer surface of the transverse threaded rod (7) is threadedly connected to the electric retractable arm (6).

4. The PCBA processing spot welding device according to claim 1, characterized in that: The fixing mechanism (201) comprises two groups of slide plates (11), and the slide plates (11) are slidably mounted on the inner wall of the fixing frame (2), and the ends of the two groups of slide plates (11) close to each other are rotatably connected to two groups of telescopic tubes (18) and abutment arms (19).

5. The PCBA processing spot welding device according to claim 4, characterized in that: One end of the telescopic tube (18) away from the slide plate (11) is rotatably connected to the abutment arm (19); racks (14) are fixedly connected to the side walls of the two slide plates (11), and the two racks (14) are not at the same height; an electric telescopic arm (13) is fixedly mounted on the inner wall of the fixed frame (2); a gear (16) is rotatably connected to the inner wall of the fixed frame (2); the gear (16) and the rack (14) are meshed with each other; an output end of the electric telescopic arm (13) is fixedly connected to a connection block (15); and one end of the connection block (15) away from the electric telescopic arm (13) is fixedly connected to one of the sets of racks (14).

6. The PCBA processing spot welding device according to claim 1, characterized in that: The conveying mechanism (401) comprises a fixed plate, a conveying motor (40) is fixedly mounted on the upper surface of the fixed plate, a first clamping wheel (41) is fixedly connected to the output end of the conveying motor (40), a second clamping wheel (42) is rotatably connected to the upper surface of the fixed plate, and the second clamping wheel (42) abuts against the first clamping wheel (41).

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