Laser tin soldering machine for tin soldering of circuit board

Abstract

The invention discloses a laser tin soldering machine for circuit board tin soldering, and belongs to the technical field of laser tin soldering machines, the laser tin soldering machine comprises a base, an operation table is fixedly mounted at the top of the base, a machine head is mounted at the top of the operation table, a mounting box is mounted on the machine head, and a mounting plate is mounted at the bottom of the mounting box; an air blower is fixedly mounted at the top of the mounting plate, a laser head is mounted at the bottom of the machine head, and a placement plate is mounted at the top of the operation table; and the automatic wire feeding mechanism comprises a wire feeding cylinder, the wire feeding cylinder is fixedly installed on the installation plate, a feeding box is installed at the top of the wire feeding cylinder, the top of the feeding box is provided with an opening, and the bottom end of the wire feeding cylinder is provided with an opening. Tin wires for tin soldering are automatically fed, guided out and used through a pneumatic structure, meanwhile, tin soldering points can be subjected to air curtain isolation, so that dust leakage is prevented, meanwhile, air suction and multi-stage filtering treatment can be carried out through the lateral notch position, and people can conveniently use the device.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser soldering machines, and more specifically, relates to a laser soldering machine for circuit board soldering. Background Art

[0002] With the development of society and the progress of technology, the development of various electronic industries such as smart home and monitoring industries has accelerated. In the electronic industry, integrated circuit boards miniaturize and visualize circuits, playing an important role. In actual production, most electronic components on circuit boards are soldered onto them through soldering technology. During the soldering process, the integrated circuit board is placed on a workbench for transportation and soldered using a soldering machine. The traditional soldering technology mainly has the following technical bottlenecks:

[0003] 1. The existing mechanical wire feeding device uses a gear transmission method, resulting in large wire feeding friction, which causes thin-diameter tin wires to be easily deformed; insufficient wire feeding accuracy affects the quality of micro-spacing solder joints; mechanical wear leads to a short maintenance cycle.

[0004] 2. For the metal vapors and aerosol particles generated by laser soldering, the traditional treatment method is single-stage filtration and dust removal with a static dust suction hood, resulting in PM2.5 exceeding the standard in the working environment.

[0005] To solve the above problems, a laser soldering machine for circuit board soldering is proposed in this application. Summary of the Invention

[0006] In view of the problems in the related art, the present invention provides a laser soldering machine for circuit board soldering to overcome the above technical problems existing in the existing related technologies.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A laser soldering machine for circuit board soldering includes a base, on the top of which an operating table is fixedly installed. On the top of the operating table, a machine head is installed. An installation box is installed on the machine head. On the bottom of the installation box, an installation plate is installed. On the top of the installation plate, a blower is fixedly installed. At the bottom of the machine head, a laser head is installed. On the top of the operating table, a placement plate is installed.

[0009] An automatic wire feeding mechanism includes a wire feeding cylinder fixedly installed on the installation plate. On the top of the wire feeding cylinder, a feeding box is installed. The top of the feeding box is open, and the bottom end of the wire feeding cylinder is open.

[0010] A dust removal mechanism includes an air extraction box. A fixed pipe is fixedly installed at the bottom of the installation plate. The air extraction box is fixedly installed at the bottom end of the fixed pipe, and a plurality of air inlets are fixedly installed on one side of the air extraction box.

[0011] The closing mechanism includes a rotating box which is rotatably installed at the bottom of the installation box. Multiple nozzles are installed at the bottom of the rotating box, and the nozzles cooperate with the placement plate.

[0012] Preferably, the automatic wire feeding mechanism further includes a feeding plate. A positioning hole is provided on the wire feeding cylinder, and the feeding plate is slidably installed in the positioning hole. A wedge-shaped surface guiding hole is provided on the feeding plate, and the wedge-shaped surface guiding hole cooperates with the inner diameter of the wire feeding cylinder.

[0013] Through the sliding connection of the feeding plate with the positioning hole and the setting of the wedge-shaped surface guiding hole on the feeding plate, when the wedge-shaped surface guiding hole communicates with the inner diameter of the wire feeding cylinder, the solder wire can be exported and fed. When the left end of the solder wire contacts and blocks the wedge-shaped stop bar, the right end of the solder wire is just located on the left side of the feeding plate. When the feeding plate moves upward, a dislocation is formed between the wedge-shaped surface guiding hole and the inner wall of the wire feeding cylinder, so as to block the solder wire on the right side of the feeding plate. At the same time, due to the effect of the wedge-shaped surface on the wedge-shaped surface guiding hole, the solder wire moved into the interior can be pushed out in the reverse direction, so as to be isolated from the solder wire being used.

[0014] Preferably, a sealing box is installed at the bottom of the wire feeding cylinder. The sealing box is movably connected to the feeding plate, and a connecting rod is fixedly installed at the bottom of the feeding plate. The connecting rod is slidably connected to the sealing box, and a stop block is fixedly installed at the bottom end of the connecting rod. The stop block cooperates with the sealing box.

[0015] The setting of the sealing box can form a sealing effect between the feeding plate and the sealing box. By injecting gas into the sealing box, it can act on the feeding plate, adjust the feeding through the feeding plate. At the same time, through the sliding connection of the connecting rod with the sealing box and being blocked by the stop block, the feeding plate can be limited.

[0016] Preferably, a ventilation channel is installed at the bottom of the wire feeding cylinder. The ventilation channel is communicated with the sealing box. The bottom of the feeding plate is provided with a wedge-shaped surface, and the wedge-shaped surface cooperates with the ventilation channel. An exhaust hole is provided on the wire feeding cylinder, and the exhaust hole is communicated with the ventilation channel. A conduit is installed at the top of the blower, and a solenoid valve is installed on the conduit. The conduit is connected to the ventilation channel.

[0017] The wind force in the blower is injected into the ventilation channel through the conduit. When there is solder wire in the wire feeding cylinder, the volume of the solder wire itself will block the exhaust hole. At this time, the gas in the ventilation channel will be exported through the sealing box. The gas entering the sealing box acts on the wedge-shaped surface of the feeding plate, thereby pushing the feeding plate upward, further isolating and blocking the solder wire on the wire feeding cylinder. At the same time, through the wind guiding of the wedge-shaped surface, the wind force acts on the top end of the solder wire below, so as to push the solder wire downward under the action of high air pressure.

[0018] Preferably, a wedge-shaped stop is slidably connected to the bottom of the wire feeding cylinder. The wedge-shaped stop cooperates with the inner wall of the wire feeding cylinder. A positioning pin rod is fixedly installed at the bottom of the wire feeding cylinder. A stop handle is fixedly installed at the bottom end of the positioning pin rod. A top spring is fixedly installed at the top of the stop handle. A connecting block is fixedly installed at the bottom of the wedge-shaped stop. The connecting block is slidably connected to the positioning pin rod, and the top end of the top spring is fixedly connected to the connecting block.

[0019] The wedge-shaped surface of the wedge-shaped stop moves downward under the pushing of the upper tin wire, so that the wedge-shaped stop moves out of the wire feeding cylinder. At this time, the elastic force of the top spring is less than the gas pressure above the wire feeding cylinder. When the wedge-shaped stop moves out of the wire feeding cylinder, the tin wire moves out of the wire feeding cylinder under the action of the gas, so as to cooperate with the laser head to perform tin wire welding operation.

[0020] Preferably, the dust removal mechanism further includes a cover plate. The cover plate is movably connected to one side of the air extraction box. Three filter nets are installed on one side of the cover plate, and the pore diameters of the three filter nets decrease in sequence.

[0021] The setting of the cover plate can seal the air extraction box. At the same time, through the setting of the three filter nets, the incoming gas can be filtered step by step, so that the dust generated during tin soldering can be suction filtered, and it is also convenient for disassembly and cleaning.

[0022] Preferably, the closing mechanism further includes a hose. One end of the hose is connected to the top of the blower, and the other end of the hose is connected to the installation box. The installation box is communicated with the rotating box.

[0023] The wind in the blower is injected into the installation box through the hose and is quickly ejected through the rotating box and the nozzle.

[0024] Preferably, a plurality of the nozzles are evenly distributed in a ring at the bottom of the rotating box. The outlet of the nozzle is offset by ten degrees along the vertical line at the edge of the rotating box, and the deflection direction is the horizontal tangent direction at the connection between the rotating box and the nozzle.

[0025] The setting that the outlet of the nozzle is offset by ten degrees from the tangent of the rotating box can make the gas ejected at high speed push the rotating box to rotate automatically in the reverse direction. With the cooperation of a plurality of nozzles, an air curtain is formed under the action of the lower placement plate, so as to form an airtight isolation for the welding position, and a notch is formed at the position below the wire feeding cylinder. When the air extraction box is located here, the spreading dust can be quickly sucked.

[0026] Preferably, two groups of crosswise linear motors are installed on the top of the operating table. The longitudinal linear motor is installed on the piston of the transverse linear motor, and the piston of the longitudinal linear motor is fixedly connected to the placement plate. A controller is installed on one side of the machine head. The controller is connected to the linear motor and the laser head.

[0027] Through the settings of the controller, it is possible to control the start of the rodless cylinder on the console, thereby adjusting the position of the placement plate, and then being able to perform welding operations at different positions through the laser head and tin wire welding.

[0028] In summary, the technical effects and advantages of the present invention are as follows:

[0029] 1. Pneumatic pressure adaptive wire feeding control system

[0030] By controlling the air flow path through the position of the tin wire itself, adopting a control method of linkage between the wedge-shaped material guiding hole and the pneumatic pressure, automatically closing the exhaust hole when the tin wire exists, the air flow pushes the material placing plate upward to block the new tin wire, and the pneumatic pressure pushes open the wedge-shaped stop bar to release the tin wire during welding, realizing self-locking and preventing backtracking, completely abandoning the traditional mechanical wire feeding mechanism, and achieving zero-friction wire feeding.

[0031] 2. Dynamic rotating air curtain sealing system

[0032] By setting the nozzle tangentially at ten degrees along the rotating box, using the reaction force of the fluid to achieve the automatic rotation of the rotating box, forming a spiral downward air curtain, effectively isolating the welding fumes, working in coordination with the dust removal mechanism, and significantly improving the dust removal efficiency.

[0033] 3. Three-stage progressive dust removal

[0034] Adopting a modular multi-stage filtration design: the pore sizes of the three-stage filter screens decrease gradually, realizing the step-by-step interception of particles with different particle sizes, and the filter screens can be replaced without tools, shortening the maintenance time.

[0035] The present invention automatically feeds and exports the tin wire for soldering through a pneumatic structure, and at the same time can isolate the soldering point with an air curtain, thereby preventing dust leakage. At the same time, it can also suck air through the lateral notch position and perform multi-stage filtration treatment, which is convenient for people to use. Brief description of the drawings

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 It is a schematic diagram of the bottom view structure of the present invention;

[0038] Figure 3 It is a schematic diagram of the structure of the automatic wire feeding mechanism and the dust removal mechanism of the present invention;

[0039] Figure 4 It is a schematic diagram of the rear view structure of the automatic wire feeding mechanism and the dust removal mechanism of the present invention;

[0040] Figure 5 It is a schematic diagram of the internal sectional structure of the wire feeding cylinder of the present invention;

[0041] Figure 6 It is a schematic diagram of the structure of the material placing plate of the present invention;

[0042] Figure 7 Schematic diagram of the air extraction box and filter screen structure of the present invention;

[0043] Figure 8 Schematic diagram of the air flow structure in the ventilation channel and wire feeding cylinder of the present invention;

[0044] Figure 9 Schematic diagram of the air flow effect structure in the ventilation channel and wire feeding cylinder of the present invention.

[0045] In the figure:

[0046] 1. Base; 2. Operating table; 3. Machine head; 4. Installation box; 5. Automatic wire feeding mechanism; 51. Wire feeding cylinder; 52. Feeding box; 53. Feeding plate; 54. Wedge-shaped material guiding hole; 55. Sealing box; 56. Connecting rod; 57. Stopper; 58. Wedge-shaped stop bar; 59. Positioning pin rod; 510. Top spring; 511. Exhaust hole; 512. Ventilation channel; 513. Duct; 514. Solenoid valve; 6. Dust removal mechanism; 61. Air extraction box; 62. Air outlet; 63. Cover plate; 64. Filter screen; 65. Fixed pipe; 7. Sealing mechanism; 71. Rotating box; 72. Sprayer; 73. Hose; 8. Installation plate; 9. Blower; 10. Laser head; 11. Controller; 12. Placing plate; 13. Rodless cylinder. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0048] Referring to Figures 1-9 , a laser soldering machine for circuit board soldering includes a base 1, a operating table 2 is fixedly installed on the top of the base 1, a machine head 3 is installed on the top of the operating table 2, an installation box 4 is installed on the machine head 3, an installation plate 8 is installed at the bottom of the installation box 4, a blower 9 is fixedly installed on the top of the installation plate 8, a laser head 10 is installed at the bottom of the machine head 3, and a placing plate 12 is installed on the top of the operating table 2;

[0049] The automatic wire feeding mechanism 5 includes a wire feeding cylinder 51, the wire feeding cylinder 51 is fixedly installed on the installation plate 8, a feeding box 52 is installed on the top of the wire feeding cylinder 51, the top of the feeding box 52 is open, and the bottom end of the wire feeding cylinder 51 is open;

[0050] The dust removal mechanism 6 includes an air extraction box 61, a fixed pipe 65 is fixedly installed at the bottom of the installation plate 8, the air extraction box 61 is fixedly installed at the bottom end of the fixed pipe 65, and a plurality of air outlets 62 are fixedly installed on one side of the air extraction box 61;

[0051] The closing mechanism 7 includes a rotating box 71 which is rotatably installed at the bottom of the installation box 4. A plurality of nozzles 72 are installed at the bottom of the rotating box 71, and the nozzles 72 cooperate with the placement plate 12.

[0052] Refer to Figure 1 、 Figure 3 and Figure 9 Also, the automatic wire feeding mechanism 5 further includes a material placing plate 53. A positioning hole is provided on the wire feeding cylinder 51. The material placing plate 53 is slidably installed in the positioning hole. A wedge surface guiding hole 54 is provided on the material placing plate 53, and the wedge surface guiding hole 54 cooperates with the inner diameter of the wire feeding cylinder 51. A sealing box 55 is installed at the bottom of the wire feeding cylinder 51. The sealing box 55 is movably connected to the material placing plate 53. A connecting rod 56 is fixedly installed at the bottom of the material placing plate 53. The connecting rod 56 is slidably connected to the sealing box 55. A stopper 57 is fixedly installed at the bottom end of the connecting rod 56, and the stopper 57 cooperates with the sealing box 55. The setting of the sealing box 55 can form a sealing effect between the material placing plate 53 and the sealing box 55, and by injecting gas into the sealing box 55, it can act on the material placing plate 53 to adjust the feeding through the material placing plate 53. At the same time, through the sliding connection between the connecting rod 56 and the sealing box 55 and being blocked by the stopper 57, the material placing plate 53 can be limited. The material placing plate 53 is slidably connected to the positioning hole, and the setting of the wedge surface guiding hole 54 on the material placing plate 53 can guide and feed the tin wire when the wedge surface guiding hole 54 communicates with the inner diameter of the wire feeding cylinder 51. When the left end of the tin wire contacts and blocks the wedge-shaped stop bar 58, the right end of the tin wire is just located on the left side of the material placing plate 53. When the material placing plate 53 moves upward, a dislocation is formed between the wedge surface guiding hole 54 and the inner wall of the wire feeding cylinder 51, so as to block the tin wire on the right side of the material placing plate 53. At the same time, the wedge surface on the wedge surface guiding hole 54 can push the tin wire moved into the interior in the reverse direction, so as to isolate it from the tin wire being used.

[0053] Refer to Figure 2 、 Figure 5 and Figure 8A ventilation channel 512 is installed at the bottom of the wire feeding cylinder 51, and the ventilation channel 512 is connected to the sealing box 55, and the bottom of the discharge plate 53 is set as a wedge-shaped surface, and the wedge-shaped surface cooperates with the ventilation channel 512. An exhaust hole 511 is opened on the wire feeding cylinder 51, and the exhaust hole 511 is connected to the ventilation channel 512. A conduit 513 is installed on the top of the blower 9, and an electromagnetic valve 514 is installed on the conduit 513. The conduit 513 is connected to the ventilation channel 512. The bottom of the wire feeding cylinder 51 is slidably connected with a wedge-shaped baffle 58, which cooperates with the inner wall of the wire feeding cylinder 51, and a positioning pin rod 59 is fixedly installed at the bottom of the wire feeding cylinder 51, and a baffle handle is fixedly installed at the bottom end of the positioning pin rod 59, and a top spring 510 is fixedly installed on the top of the baffle handle. A connecting block is fixedly installed at the bottom of the wedge-shaped baffle 58, and the connecting block is slidably connected to the positioning pin rod 59, and the top of the top spring 510 is fixedly connected to the connecting block. The shaped surface moves downward under the push of the tin wire above, so that the wedge-shaped baffle 58 moves out of the wire feeding cylinder 51. At this time, the elastic force of the top spring 510 is less than the gas pressure above the wire feeding cylinder 51. When the wedge-shaped baffle 58 moves out of the wire feeding cylinder 51, the tin wire moves out of the wire feeding cylinder 51 under the action of the gas, so that the tin wire welding operation is performed under the action of the laser head 10, and the wind force in the blower 9 is injected into the ventilation channel 512 through the conduit 513. When there is tin wire inside the wire feeding cylinder 51, the volume of the tin wire itself will block the exhaust hole 511. At this time, the gas in the ventilation channel 512 will be discharged through the sealing box 55. The gas entering the sealing box 55 acts on the wedge surface of the discharge plate 53, thereby pushing the discharge plate 53 to move upward, and then isolating and blocking the tin wire on the wire feeding cylinder 51. At the same time, through the wind guiding of the wedge surface, the wind force acts on the top of the tin wire below, thereby pushing the tin wire downward under the action of high air pressure.

[0054] Reference Figure 7 The dust removal mechanism 6 also includes a cover plate 63, which is movably connected to one side of the exhaust box 61, and three filter screens 64 are installed on one side of the cover plate 63, and the apertures of the three filter screens 64 decrease successively. The setting of the cover plate 63 can seal the exhaust box 61, and at the same time, through the setting of the three filter screens 64, the incoming gas can be filtered step by step, so that the dust generated during soldering can be sucked and filtered, and it can also be convenient for disassembly and cleaning.

[0055] Reference Figure 1, the closing mechanism 7 further includes a hose 73. One end of the hose 73 is connected to the top of the blower 9, and the other end of the hose 73 is connected to the mounting box 4. The mounting box 4 communicates with the rotating box 71. A plurality of the nozzles 72 are evenly distributed in a ring at the bottom of the rotating box 71. The outlet of the nozzle 72 is offset by ten degrees along the vertical line at the edge of the rotating box 71, and the skewing direction is the horizontal tangent direction at the connection between the rotating box 71 and the nozzle 72. The wind force in the blower 9 is injected into the mounting box 4 through the hose 73 and is quickly ejected through the rotating box 71 and the nozzles 72. The setting that the outlet of the nozzle 72 is offset by ten degrees from the tangent of the rotating box 71 can enable the high-speed ejected gas to push the rotating box 71 to rotate automatically in the reverse direction, and cooperate with the action of a plurality of nozzles 72. Thus, under the action of the placing plate 12 below, an air curtain is formed, so as to form an airtight isolation for the welding position, and a notch is formed at the position below the wire feeding cylinder 51. When the air extraction box 61 is located here, the spreading dust can be quickly sucked out.

[0056] Refer to Figure 1 , two sets of criss-crossed linear motors 13 are installed on the top of the operating table 2. The longitudinal linear motor 13 is installed on the piston of the transverse linear motor 13, and the piston of the longitudinal linear motor 13 is fixedly connected to the placing plate 12. A controller 11 is installed on one side of the machine head 3. The controller 11 is connected to the linear motor 13 and the laser head 10. Through the setting of the controller 11, the linear motor 13 on the operating table 2 can be controlled to start, so as to adjust the position of the placing plate 12, and further, welding operations can be performed on different positions through the laser head 10 and the tin wire welding.

[0057] Working principle: During operation, the circuit board is placed on the placing plate 12, and the tin wire is placed in the feeding box 52. The stacked tin wire falls into the wire feeding cylinder 51 under the action of gravity, and due to the inclined setting of the wire feeding cylinder 51, it moves towards the lower left of the wire feeding cylinder 51. When it moves to the position of the feeding plate 53, it is led out through the wedge-shaped guide hole 54 of the feeding plate 53. At the same time, the controller 11 controls the blower 9 to start. The blower 9 sucks the air on the placing plate 12 through the air extraction box 61 and the air outlet 62, and discharges it through the conduit 513 and the hose 73. The wind force in the blower 9 is injected into the ventilation channel 512 (as Figure 8 ), when there is tin wire inside the wire feeding cylinder 51, the volume of the tin wire itself will block the exhaust hole 511. At this time, the gas in the ventilation channel 512 will be led out through the sealing box 55, and the gas entering the sealing box 55 acts on the wedge surface of the feeding plate 53, thereby pushing the feeding plate 53 to move upward (as Figure 9) Thus, it isolates and blocks the tin wire on the wire feeding cylinder 51. At the same time, through the air guiding of the wedge surface, the wind force acts on the top end of the tin wire below, so as to push the tin wire downward under the action of high air pressure. The wedge surface of the wedge-shaped stop bar 58 moves downward under the pushing of the upper tin wire, so that the wedge-shaped stop bar 58 moves out of the wire feeding cylinder 51. At this time, the elastic force of the top spring 510 is less than the air pressure above the wire feeding cylinder 51. When the wedge-shaped stop bar 58 moves out of the wire feeding cylinder 51, the tin wire moves out of the wire feeding cylinder 51 under the action of the gas, so as to cooperate with the laser head 10 to perform the tin wire welding operation. After the tin wire moves out of the wire feeding cylinder 51, the exhaust hole 511 communicates with the outside, so that the gas in the ventilation channel 512 is discharged through the exhaust hole 511. The feeding plate 53 moves downward under the action of gravity, so that the wedge surface feeding hole 54 is communicated with the inner diameter of the wire feeding cylinder 51, and the tin wire is exported and fed. When the left end of the tin wire contacts and blocks the wedge-shaped stop bar 58, the right end of the tin wire is just located on the left side of the feeding plate 53. When the feeding plate 53 moves upward, it forms a dislocation with the inner wall of the wire feeding cylinder 51 through the wedge surface feeding hole 54, so as to block the tin wire on the right side of the feeding plate 53. At the same time, the action of the wedge surface on the wedge surface feeding hole 54 can push the tin wire moved into the inside in the reverse direction, so as to isolate it from the tin wire being used. At the same time, the setting of the solenoid valve 514 can control the intensity of the air pressure entering the conduit 513. The setting of the inner cover plate 63 of the air extraction box 61 can seal the air extraction box 61. At the same time, through the setting of the three filter meshes 64, the entering gas can be filtered step by step, so that the dust generated during tin soldering can be sucked and filtered, and it is also convenient for disassembly and cleaning. The wind force in the blower 9 is injected into the installation box 4 through the hose 73 and is quickly ejected through the rotating box 71 and the nozzle 72. The outlet of the nozzle 72 is offset by ten degrees from the tangent of the rotating box 71, which can make the gas ejected at high speed push the rotating box 71 to rotate automatically in the reverse direction. With the cooperation of multiple nozzles 72, an air curtain is formed under the action of the lower placing plate 12, so as to form an airtight isolation for the welding position, and a notch is formed at the position below the wire feeding cylinder 51. When the air extraction box 61 is located here, it can quickly suck the spreading dust.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser soldering machine for soldering circuit boards, comprising a base (1), characterized in that: An operating table (2) is fixedly mounted on the top of the base (1), a machine head (3) is mounted on the top of the operating table (2), a mounting box (4) is mounted on the machine head (3), a mounting plate (8) is mounted on the bottom of the mounting box (4), a blower (9) is fixedly mounted on the top of the mounting plate (8), a laser head (10) is mounted on the bottom of the machine head (3), and a placement plate (12) is mounted on the top of the operating table (2); An automatic wire feeding mechanism (5) comprises a wire feeding drum (51), wherein the wire feeding drum (51) is fixedly mounted on a mounting plate (8), a loading box (52) is mounted on the top of the wire feeding drum (51), the top of the loading box (52) is open, and the bottom of the wire feeding drum (51) is open; The dust removal mechanism (6) comprises an exhaust box (61), a fixed pipe (65) is fixedly mounted on the bottom of the mounting plate (8), the exhaust box (61) is fixedly mounted on the bottom end of the fixed pipe (65), and a plurality of air outlets (62) are fixedly mounted on one side of the exhaust box (61); The sealing mechanism (7) comprises a rotating box (71) which is rotatably mounted on the bottom of the mounting box (4). A plurality of spray heads (72) are mounted on the bottom of the rotating box (71) and the spray heads (72) cooperate with the placement plate (12).

2. A laser soldering machine for circuit board soldering according to claim 1, characterized in that: The automatic wire feeding mechanism (5) further comprises a feeding plate (53), a positioning hole is provided on the wire feeding cylinder (51), the feeding plate (53) is slidably mounted in the positioning hole, a wedge-shaped material guide hole (54) is provided on the feeding plate (53), and the wedge-shaped material guide hole (54) and the inner diameter of the wire feeding cylinder (51) are matched with each other.

3. A laser soldering machine for circuit board soldering according to claim 2, characterized in that: A sealing box (55) is installed at the bottom of the wire feeding cylinder (51), and the sealing box (55) is movably connected to the discharge plate (53). A connecting rod (56) is fixedly installed at the bottom of the discharge plate (53), and the connecting rod (56) is slidably connected to the sealing box (55). A stopper (57) is fixedly installed at the bottom end of the connecting rod (56), and the stopper (57) is limitedly matched with the bottom of the sealing box (55).

4. A laser soldering machine for circuit board soldering according to claim 3, characterized in that: The bottom of the wire feeding cylinder (51) is provided with a ventilation channel (512), the ventilation channel (512) and the sealing box (55) are interconnected, and the bottom of the discharge plate (53) is provided with a wedge-shaped surface, and the wedge-shaped surface and the ventilation channel (512) cooperate with each other, the wire feeding cylinder (51) is provided with an exhaust hole (511), the exhaust hole (511) and the ventilation channel (512) are interconnected, and a conduit (513) is installed on the top of the blower (9), an electromagnetic valve (514) is installed on the conduit (513), and the conduit (513) is connected to the ventilation channel (512).

5. A laser soldering machine for circuit board soldering according to claim 4, characterized in that: The bottom of the wire feeding cylinder (51) is slidably connected with a wedge-shaped baffle (58), which cooperates with the inner wall of the wire feeding cylinder (51), and a positioning pin rod (59) is fixedly installed at the bottom of the wire feeding cylinder (51), a baffle handle is fixedly installed at the bottom end of the positioning pin rod (59), and a top spring (510) is fixedly installed on the top of the baffle handle, and a connecting block is fixedly installed at the bottom of the wedge-shaped baffle (58), the connecting block is slidably connected to the positioning pin rod (59), and the top end of the top spring (510) is fixedly connected to the connecting block.

6. The laser soldering machine for circuit board soldering according to claim 1, characterized in that: The dust removal mechanism (6) further comprises a cover plate (63), the cover plate (63) being movably connected to one side of the exhaust box (61), and three filter screens (64) being installed on one side of the cover plate (63), and the apertures of the three filter screens (64) are successively reduced.

7. The laser soldering machine for circuit board soldering according to claim 1, characterized in that: The sealing mechanism (7) further comprises a hose (73), one end of which is connected to the top of the blower (9), and the other end of which is connected to the mounting box (4), and the mounting box (4) and the rotating box (71) are in communication with each other.

8. The laser soldering machine for circuit board soldering according to claim 1, characterized in that: The plurality of nozzles (72) are evenly distributed in a ring shape at the bottom of the rotating box (71), and the outlets of the nozzles (72) are offset by ten degrees along the vertical line of the edge of the rotating box (71), and the deflection direction is the horizontal tangent direction of the connection between the rotating box (71) and the nozzles (72).

9. The laser soldering machine for circuit board soldering according to claim 1, characterized in that: Two groups of crisscross rodless cylinders (13) are installed on the top of the operating table (2), the longitudinal rodless cylinder (13) is installed on the piston of the transverse rodless cylinder (13), and the piston of the longitudinal rodless cylinder (13) is fixedly connected to the placement plate (12), and a controller (11) is installed on one side of the machine head (3), and the controller (11) is connected to the rodless cylinder (13) and the laser head (10).

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