A commutator base anti-tin explosion welding device and control method thereof

Abstract

A commutator base anti-tin explosion welding device and a control method thereof, comprising a soldering module, a device table, a turntable and a rotor commutator. The soldering modules are evenly distributed in an annular shape and fixedly connected to the device table to form a processing station in the center. The rotor commutator is mounted on the turntable, and the rotor commutator is at the processing station. The turntable is mounted on the device table. The soldering module comprises a welding gun bracket, a spraying assembly, a baffle assembly, a rolling assembly and a wire supply wheel. Tin wire is arranged in the wire supply wheel. The rolling assembly cuts the tin wire to form tin segments. The spraying assembly and the rolling assembly are connected by a tin segment conduit, which is fed into the spraying assembly through the tin segment conduit. The spraying assembly heats the tin segment and sprays it onto the rotor commutator. The baffle assembly is arranged between the spraying assembly and the coil. After welding is completed, the baffle assembly is recovered and the remaining tin slag is automatically cleaned, so that the amount of solder can be accurately controlled and the tin slag can be prevented from getting on the coil.

Description

Technical Field

[0001] The invention relates to the technical field of commutator base welding, and in particular to a commutator base tin explosion prevention welding device and a control method thereof. Background Art

[0002] The commutator base of micro motor rotors is mostly produced by automated soldering. Currently, wire feeding and high-temperature electric soldering iron pressure welding are used. Due to compressive stress and local thermal expansion of the flux in the welding wire, a "tin explosion" phenomenon occurs, causing tiny tin particles to appear on the motor rotor coils and cores. This is not only unsafe and easy to injure workers, but also affects the dynamic balance of the rotor, introduces more mechanical noise into the motor, and reduces the customer experience. Improvements are urgently needed.

[0003] The patent application number 2019100533121, "Laser welding device and welding protective cover", mentioned that the feeding assembly uses a whole tin wire to melt and then quickly detach, and uses a protective cover to prevent tin explosion. This invention makes it difficult to accurately control the amount of solder. At the same time, the tin wire has "drawing" burrs when it is detached, and the anti-expansion cover is not cleaned regularly. The patent application number 2013204047328, "A tin-breaking structure of a tin feeding system", mentioned a tin-breaking structure, but there is only tin-breaking, which cannot guarantee the tin-breaking quality of each section of tin wire, and cannot accurately control the amount of solder. Summary of the invention

[0004] In view of the shortcomings and defects of the prior art, a commutator base anti-tin explosion welding device and a control method thereof are provided. In order to achieve the purpose of accurately controlling the amount of solder and preventing tin slag from sticking to the coil, the present invention provides the following technical solutions.

[0005] The present invention provides a commutator base anti-tin explosion welding device, comprising a soldering module, a device table, a turntable and a rotor commutator, the soldering modules are evenly distributed in an annular shape and fixedly connected to the device table, forming a processing station in the center, the rotor commutator is mounted on the turntable, and the rotor commutator is at the processing station, and the turntable is mounted on the device table; the soldering module comprises a welding gun bracket, a spraying assembly, a baffle assembly, a rolling assembly and the wire feeding wheel, the wire feeding wheel is provided with tin wire, the rolling assembly cuts the tin wire to form tin segments, the spraying assembly and the rolling assembly are connected by a tin segment conduit, the tin segment conduit is fed into the spraying assembly, the spraying assembly heats the tin segment and then sprays it onto the rotor commutator, the baffle assembly is arranged between the spraying assembly and the coil, and after welding is completed, the baffle assembly is recovered and the remaining tin slag is automatically cleaned.

[0006] Compared with the prior art, the present invention has three solder modules evenly distributed in a ring on the device table, forming a processing station at the center, and performing welding at the processing station, which can improve the welding effect; the tin wire is pierced by the rolling and cutting assembly to release the stress of the flux when heated, and the amount of welding wire is accurately controlled by fixed-length cutting, while ensuring the consistency of welding quality; the baffle assembly is arranged between the spray assembly and the coil to separate the commutator welding point from the coil to ensure that tin particles cannot splash onto the rotor coil; and the device of the present invention has high automation, and the operator only needs to calibrate the laser welding point in advance and manually check the maintenance plate regularly, which is relatively simple to use.

[0007] Furthermore, the spray assembly includes an injector, an injector switch valve, and a laser heating element. The injector is fixedly connected to a side of the welding gun bracket close to the rotor commutator. The laser heating element is arranged on the outside of the injector. A mounting platform is arranged on one side of the laser heating element. The injector switch valve is fixedly arranged on the mounting platform and is connected to the injector through an air pipe.

[0008] Through the above improvements, the spray assembly includes an injector, an air jet switch valve, and a laser heating element. The laser heating element adopts laser heating. The air jet switch valve can send the semi-heated and semi-molten tin wire to the soldering point through the airflow from the injector, and then heat it for the second time through the laser heating element to completely melt the tin material to complete the welding. The soldering point can be made full by control.

[0009] Furthermore, the baffle assembly includes a baffle guide rail, a laser heating block, a scraper and a shielding plate. The baffle guide rail is fixedly connected to the side of the welding gun bracket close to the rotor commutator, the lower end of the baffle guide rail away from the welding gun bracket is equipped with a laser heating block, and the upper end of the other side is equipped with a rotating motor. The shielding plate is arranged in the baffle guide rail, and the rotating motor drives the shielding plate to slide in the baffle guide rail; the scraper is welded on the side of the baffle guide rail away from the welding gun bracket, and the blade of the scraper is in contact with the lower surface of the shielding plate.

[0010] Through the above improvements, the baffle assembly includes a baffle guide rail, a laser heating block, a scraper and a shielding plate. A rotating motor is installed at the upper end of one side of the baffle slide rail. The rotating motor drives the shielding plate to slide in the baffle guide rail, so that the shielding plate can be extended during welding to prevent welding slag from splashing, and can be recovered after welding is completed; the scraper is welded to the side of the baffle guide rail away from the welding gun bracket, and a laser heating block is provided at the lower end. The blade of the scraper is in contact with the lower surface of the shielding plate, and the shielding plate is periodically contracted to the initial point. The laser emitted by the laser heating block heats the tin slag on the guard plate to soften it, and the scraper is used to automatically clean the tin slag to ensure that the tin slag does not fall in the commutator area of ​​the motor rotor.

[0011] Furthermore, the shielding plate is W-shaped, and an upper end surface of the shielding plate on a side close to the rotor commutator is in contact with a lower end of the coil.

[0012] Through the above improvements, the shielding plate is W-shaped, and the W-shaped shielding plate fits the lower end of the coil on the rotor commutator, so that the shielding plate can better shield the welding point and the coil, preventing tin slag from splashing onto the coil.

[0013] Furthermore, the grinding assembly includes an outer shell, an input pipe, a grinding wheel body, a guide wheel and an output pipe, the input pipe is fixedly connected to one end of the inner wall of the outer shell, the output pipe is fixedly connected to the other end of the inner wall of the outer shell, the grinding wheel body is arranged between the input pipe and the output pipe through a rotating shaft, and the guide wheel is arranged at the upper end of the output pipe.

[0014] Through the above improvements, the rolling and cutting assembly includes an outer shell, an input pipe, a rolling and cutting wheel body, a guide wheel and an output pipe. The input pipe feeds the tin wire into the assembly for puncture cutting. The rolling and cutting wheel body releases the stress of the tin wire during flux heating by puncturing, and cuts the tin wire into tin segments by fixed-length cutting. The guide wheel can ensure that the tin segments enter the output pipe smoothly, thereby ensuring the uniformity of the size of the solder joints generated during welding.

[0015] Furthermore, the grinding wheel body includes two rotating wheels symmetrically arranged on both sides of the input pipe, and the rotating wheel is provided with a plurality of semicircular protrusions that can crush the tin wire. The protrusions are evenly arrayed on the arc surface of the rotating wheel, and a cutting piece is provided on the rotating wheel. Every two protrusions are cooperated with the cutting piece, and the cutting piece cuts the tin wire into a plurality of tin segments of uniform length.

[0016] Through the above improvements, the grinding wheel body includes two rotating wheels symmetrically arranged on both sides of the input pipe, and a number of semicircular protrusions in a uniform array are arranged on the rotating wheel. The semicircular protrusions can ensure that the tin wire is crushed when the tin wire is transported, and can release part of the stress when the flux is heated. A cutting piece is arranged on the rotating wheel, and every two protrusions are cooperated with the cutting piece. The cutting piece can cut the tin wire into tin segments of fixed length to ensure the consistency of welding quality.

[0017] Furthermore, one end of the output pipe away from the cutting wheel body is connected to the tin segment conduit, the output pipe is U-shaped, and the output pipe includes a matching section and a conveying section, and an inclination angle is set between the matching section and the conveying section.

[0018] Through the above improvements, the output pipeline is U-shaped, and the output pipeline includes a matching section and a conveying section. An inclination is set between the matching section and the conveying section to ensure that the cut tin section can smoothly enter the output pipeline to be transported to the spraying assembly.

[0019] Furthermore, the present invention provides a control method for a commutator base anti-tin explosion welding device, which is used to control the commutator base anti-tin explosion welding device, and the control method specifically includes the following steps:

[0020] Step 1: Installation and transportation of tin wire materials: The wire supply wheel is installed on the welding gun bracket, and the tin wire on the wire supply wheel is fed into the tin cutting device from the input pipeline;

[0021] Step 2, tin wire cutting: when the tin wire is fed into the rolling and cutting assembly, the rolling and cutting assembly cuts the tin wire into tin segments, and the tin segments are transported to the spraying assembly from the output pipe;

[0022] Step 3, the shielding plate extends: the W-shaped shielding plate extends from the baffle guide rail, extends to the top of the rotor commutator, fits with the lower end of the coil on the rotor commutator, and separates the coil from the welding point;

[0023] Step 4, first heating: the tin section is heated to a semi-solid state by the laser heating element for the first time, and the semi-solid solder is pushed to the soldering point by the high-speed gas by opening the gas jet switch valve;

[0024] Step 5, second heating: The laser heats the solder joints for the second time to liquefy them and cool them to form full solder joints;

[0025] Step 6: The shielding plate retreats: The W-shaped shielding plate retreats to a short distance, waiting for the next welding;

[0026] Step 7, cleaning the shielding plate: Whenever the welding of N rotor commutators is completed, the welding slag remaining on the shielding plate is heated by the laser heating block, and the welding slag is removed by the scraper.

[0027] Compared with the prior art, the present invention adopts laser secondary welding to replace electric soldering iron pressure welding. The tin wire alloy material is heated to a semi-solid tissue state through the first heating, and is sent to the commutator soldering point position through airflow. Through the second heating, the soldering point has a good spheroidization effect and is full, which greatly reduces the probability of tin explosion during welding of the commutator base and ensures the dynamic balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the three-dimensional structure of the device;

[0029] Figure 2 It is a schematic diagram of the structural position of the turntable, rotor commutator and soldering module of the device;

[0030] Figure 3 A schematic diagram of the three-dimensional structure of the soldering module of the device;

[0031] Figure 4It is a schematic diagram of the planar structure of the soldering module of the device;

[0032] Figure 5 A schematic diagram of the three-dimensional structure of the baffle assembly of the device;

[0033] Figure 6 A schematic diagram of the top view position of the turntable, rotor commutator and soldering module of the device;

[0034] Figure 7 For the device Figure 1 The local enlarged structure diagram at A in FIG.

[0035] Figure 8 For the device Figure 6 A local enlarged structural diagram of point B in the figure.

[0036] Among them, 1. soldering module; 2. device table; 3. turntable; 4. rotor commutator; 5. processing station; 6. welding gun bracket; 6.1. positioning shaft; 7. spray assembly; 7.1. ejector; 7.2. jet switch valve; 7.3. laser heating element; 7.31. mounting table; 8. baffle assembly; 8.1. baffle guide rail; 8.2. laser heating block; 8.3. scraper; 8.4. baffle; 8.5. rotating motor; 9. grinding assembly; 9.1. outer shell; 9.2. input pipeline; 9.3. grinding wheel body; 9.31. rotating wheel; 9.32. protrusion; 9.33. cutting element; 9.4. guide wheel; 9.5. output pipeline; 9.51. matching section; 9.52. conveying section; 10. wire supply wheel; 11. tin wire; 12. tin section guide tube; 13. coil. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] like Figures 1 to 7The commutator base anti-tin explosion welding device shown includes a soldering module 1, a device table 2, a turntable 3 and a rotor commutator 4. The welding modules are evenly distributed in an annular shape and fixedly connected to the device table 2, forming a processing station 5 in the center. The rotor commutator 4 is installed on the turntable 3, and the rotor commutator 4 is at the processing station 5. The turntable 3 is installed on the device table 2; the soldering module 1 includes a welding gun bracket 6, a spraying assembly 7, a rolling assembly 9, a baffle assembly 8 and a wire feeding wheel 10. A tin wire 11 is arranged in the wire feeding wheel 10. The rolling assembly 9 cuts the tin wire 11 to form a tin segment. The spraying assembly 7 and the rolling assembly 9 are connected by a tin segment conduit 12, and the tin segment conduit 12 is fed into the spraying assembly 7. The spraying assembly 7 heats the tin segment and sprays it onto the rotor commutator 4. The baffle assembly 8 is arranged between the spraying assembly 7 and the coil 13. After welding is completed, the baffle assembly 8 is recovered and the remaining tin slag is automatically cleaned.

[0040] like Figure 1 , Figure 2 as well as Figure 6 As shown, the turntable 3 is arranged on the device table 2, and the positioning grooves on the turntable 3 are arranged in a circular array according to the axis of the turntable 3. The rotor commutator 4 is equipped with a coil 13.

[0041] like Figure 3 as well as Figure 4 As shown, the soldering module 1 includes a welding gun bracket 6, a spray assembly 7, a milling assembly 9, a baffle assembly 8 and a wire supply wheel 10. A positioning shaft 6.1 is provided at the upper end of the welding gun bracket 6. The wire supply wheel 10 is arranged at the upper end of the welding gun bracket 6 through the positioning shaft 6.1. The milling assembly 9 is installed in the welding gun bracket 6. The spray assembly 7 and the baffle assembly 8 are arranged on the same side of the welding gun bracket 6 close to the processing station 5, and the baffle assembly 8 is arranged at the upper end of the spray assembly 7. At the same time, the spray assembly 7 and the milling assembly 9 are connected by a tin segment conduit 12. A plurality of tin wires 11 are wound around the wire supply wheel 10. The tin wires 11 are made of a mixed material of copper, tin and rosin, which is convenient for melting the tin wires 11 into a semi-solid state. The tin wires 11 enter the milling assembly 9 from the wire supply wheel 10, and are cut into tin segments by the piercing of the milling assembly 9, and are then fed into the spray assembly 7 through the tin segment conduit 12 for welding.

[0042] like Figure 3 as well as Figure 4As shown, the spray assembly 7 includes an injector 7.1, an air jet switch valve 7.2, and a laser heating element 7.3. The injector 7.1 is fixedly connected to a side of the welding gun bracket 6 close to the rotor commutator 4. The laser heating element 7.3 is sleeved on the outer side of the injector 7.1. A mounting platform 7.31 is provided on one side of the laser heating element 7.3. The air jet switch valve 7.2 is fixedly provided on the mounting platform 7.31 and connected to the injector 7.1 through an air pipe. The laser heating element 7.3 adopts laser heating. The air jet switch valve 7.2 can send the semi-heated and semi-molten tin wire 11 from the injector 7.1 to the welding point through the airflow, and then heat it for the second time through the laser heating element 7.3 to completely melt the tin material and complete the welding. The welding point can be plump by control.

[0043] like Figure 3 as well as Figure 4 As shown, the baffle assembly 8 includes a baffle guide rail 8.1, a laser heating block 8.2, a scraper 8.3 and a baffle plate 8.4. A rotating motor 8.5 is installed at the upper end of one side of the baffle slide rail. The rotating motor 8.5 is fixed to the upper side of the baffle guide rail 8.1 by screws. A motor pinion and a speed regulating gear are provided on the rotating motor 8.5. The motor pinion is meshed with the speed regulating gear set. The motor pinion and the speed regulating gear set are installed on one side of the baffle guide rail 8.1. The baffle plate 8.4 slides in the inner cavity of the baffle guide rail 8.1, and the end of the baffle plate 8.4 is a rack, which is meshed with the speed regulating gear set. The rotating motor 8.5 drives the baffle plate 8.4 to slide in the baffle guide rail 8.1, and can control the sliding speed of the baffle plate 8.4, so that the baffle plate 8.4 can be extended during welding to prevent welding slag from splashing, and can be recovered after welding is completed.

[0044] The shielding plate 8.4 is W-shaped, such as Figure 7 as well as Figure 8 As shown, the W-shaped shielding plate 8.4 fits the lower end of the coil 13 on the rotor commutator 4, so that the shielding plate 8.4 can better shield the welding point and the coil 13 to prevent tin slag from splashing onto the coil 13.

[0045] A laser heating block 8.2 is installed at the lower end of the baffle guide rail 8.1 away from the welding gun bracket 6, and a scraper 8.3 is welded to the side of the baffle guide rail 8.1 away from the welding gun bracket 6. The blade of the scraper 8.3 fits with the lower surface of the shielding plate 8.4. The shielding plate 8.4 shrinks to the initial point regularly. The laser emitted by the laser heating block 8.2 heats the tin slag on the guard plate to soften it, and the scraper 8.3 is used to automatically clean the tin slag to ensure that the tin slag does not fall into the motor rotor commutator 4 area.

[0046] like Figure 5As shown, the grinding assembly 9 includes an outer shell 9.1, an input pipe 9.2, a grinding wheel body 9.3, a guide wheel 9.4 and an output pipe 9.5. The input pipe 9.2 feeds the tin wire 11 into the assembly for puncturing, the grinding wheel body 9.3 releases the stress of the tin wire 11 during the heating of the flux by puncturing, and cuts the tin wire 11 into tin segments by fixed-length cutting, and the guide wheel 9.4 can ensure that the tin segments smoothly enter the output pipe 9.5; the output pipe 9.5 is U-shaped, and the output pipe 9.5 includes a matching section 9.51 and a conveying section 9.52. An inclination angle is set between the matching section 9.51 and the conveying section 9.52, which can ensure that the tin segments after cutting can smoothly enter the output pipe 9.5 to be transported to the spray assembly 7, and ensure the uniformity of the size of the solder joints generated during welding.

[0047] The grinding wheel body 9.3 includes two rotating wheels 9.31 symmetrically arranged on both sides of the input pipe 9.2, and a plurality of semicircular protrusions 9.32 are arranged on the rotating wheel 9.31 in a uniform array, which can ensure that the tin wire 11 is crushed during the transportation of the tin wire 11 and release the stress when the flux is heated. A cutting piece 9.33 is arranged on the rotating wheel 9.31, and the protrusions 9.32 spaced apart are matched with the cutting piece 9.33 to cut the tin wire 11 into fixed-length tin segments to ensure the consistency of welding quality.

[0048] The present invention also provides a control method for a commutator base anti-tin explosion welding device, and the control method specifically comprises the following steps:

[0049] Step 1, installation and transportation of tin wire 11 material: the wire supply wheel 10 is installed on the welding gun bracket 6, and the tin wire 11 on the wire supply wheel 10 is fed into the tin cutting device through the input pipeline 9.2.

[0050] Step 2, cutting the tin wire 11: When the tin wire 11 is fed into the rolling and cutting assembly 9, the rolling and cutting assembly 9 cuts the tin wire 11 into tin segments, and the tin segments are transported to the spraying assembly 7 from the output pipe 9.5.

[0051] The semicircular protrusions 9.32 on the symmetrically arranged rotating wheel 9.31 in the grinding assembly 9 can grind the tin wire 11 to release the stress of the soldering flux when it is heated; and the cutting piece 9.33 arranged on the rotating wheel 9.31 can cut the tin wire 11 into a plurality of tin segments of equal length.

[0052] Step 3, the shielding plate 8.4 extends: the W-shaped shielding plate 8.4 extends from the baffle rail 8.1, extends to the top of the rotor commutator 4, fits with the lower end of the coil 13 on the rotor commutator 4, and separates the coil 13 from the welding point;

[0053] Step 4, first heating: the tin section is firstly laser-heated by the laser heating element 7.3 to a semi-solid state, and the semi-solid solder is pushed to the soldering point by the high-speed gas by opening the gas jet switch valve 7.2.

[0054] The laser heating element 7.3 emits the first laser into the ejector 7.1, so that the tin segment forms a semi-solid solder (a mixture of tin alloy and flux), and then the ejector 7.1 pushes the solder heated to a semi-solid state through the jet switch valve 7.2 to the processing station 5 for welding.

[0055] Step 5, second heating: The laser heats the solder joints for the second time to liquefy them and cool them to form full solder joints.

[0056] The laser heating element 7.3 emits a second laser to completely liquefy the welding spot on the rotor commutator 4, so that it forms a full welding spot.

[0057] Step 6, the shielding plate 8.4 retreats: the W-shaped shielding plate 8.4 retreats to a short distance, waiting for the next welding.

[0058] Step 7, cleaning the shielding plate 8.4: Whenever the welding of N rotor commutators 4 is completed, the welding slag remaining on the shielding plate 8.4 is heated by the laser heating block 8.2, and the welding slag is removed by the scraper 8.3.

[0059] After a certain number of welding operations, a small amount of welding slag will accumulate on the lower surface of the front end of the shielding plate 8.4. In the process of returning the shielding plate 8.4 to the initial position, the laser heating block 8.2 is used to emit laser to heat the front end of the shielding plate 8.4 to soften the welding slag. At this time, the shielding plate 8.4 and the scraper 8.3 are in reciprocating contact to clean the welding slag on the lower end surface of the shielding plate 8.4, thereby achieving a self-cleaning effect of the welding slag.

[0060] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A commutator base anti-tin explosion welding device, characterized in that: The invention comprises a soldering module (1), a device table (2), a turntable (3) and a rotor commutator (4); the soldering module (1) is evenly distributed in an annular shape and fixedly connected to the device table (2), forming a processing station (5) in the center; the rotor commutator (4) is mounted on the turntable (3), and the rotor commutator (4) is located at the processing station (5); the turntable (3) is mounted on the device table (2); the soldering module (1) comprises a welding gun bracket (6), a spray assembly (7), A baffle assembly (8), a grinding assembly (9) and a wire feeding wheel (10), wherein a tin wire (11) is arranged in the wire feeding wheel (10), and the grinding assembly (9) cuts the tin wire (11) into tin segments, and the spraying assembly (7) and the grinding assembly (9) are connected via a tin segment conduit (12), and the grinding assembly (9) comprises a grinding wheel body (9.3), and the grinding wheel body (9.3) grinds the tin wire (11) and feeds it into the spraying assembly (7) via the tin segment conduit (12); The grinding assembly (9) comprises an outer shell (9.1), an input pipe (9.2), a guide wheel (9.4) and an output pipe (9.5); the grinding wheel body (9.3) comprises two rotating wheels (9.31) symmetrically arranged on both sides of the input pipe (9.2); the rotating wheel (9.31) is provided with a plurality of semicircular protrusions (9.32) capable of crushing the tin wire (11); the protrusions (9.32) are evenly arrayed on the arc surface of the rotating wheel (9.31); and a cutting piece (9.33) is provided on the rotating wheel (9.31); the protrusions (9.32) are arranged in cooperation with the cutting piece (9.33) at intervals of two; the cutting piece (9.33) cuts the tin wire (11) into a plurality of tin segments of uniform length; The baffle assembly (8) comprises a baffle guide rail (8.1), a laser heating block (8.2) and a scraper (8.3); the baffle guide rail (8.1) is fixedly connected to a side of the welding gun bracket (6) close to the rotor commutator (4); a laser heating block (8.2) is installed at the lower end of the baffle guide rail (8.1) away from the welding gun bracket (6); a rotating motor (8.5) is installed at the upper end of the other side; a baffle plate (8.4) is arranged in the baffle guide rail (8.1); the rotating motor (8.5) drives the baffle plate (8.4) to slide in the baffle guide rail (8.1); the scraper (8.3) is welded to a side of the baffle guide rail (8.1) away from the welding gun bracket (6), and the blade of the scraper (8.3) is in contact with the lower surface of the baffle plate (8.4); The spray assembly (7) comprises an injector (7.1), an air jet switch valve (7.2), and a laser heating element (7.3); the injector (7.1) is fixedly connected to a side of the welding gun bracket (6) close to the rotor commutator (4); the laser heating element (7.3) is arranged on the outside of the injector (7.1); a mounting platform (7.31) is arranged on one side of the laser heating element (7.3); the air jet switch valve (7.2) is fixedly arranged on the mounting platform (7.31) and connected to the injector (7.1) via an air pipe; First heating: the tin section is first laser-heated by the laser heating element (7.3) to a semi-solid state, and the semi-solid solder is pushed to the soldering point by the high-speed gas by opening the gas jet switch valve (7.2); The laser heating element (7.3) emits a first laser beam into the ejector (7.1), so that the tin segment forms a semi-solid solder, and then the ejector (7.1) pushes the solder heated to a semi-solid state through the jet switch valve (7.2) to the processing station (5) for welding; Second heating: The laser heats the solder joint for the second time to liquefy the solder joint, and cools to form a full solder joint; the laser heating element (7.3) emits a second laser to completely liquefy the solder joint on the rotor commutator (4), so that it forms a full solder joint; The spraying assembly (7) heats the tin segment and then sprays it onto the rotor commutator (4); the baffle assembly (8) is arranged between the spraying assembly (7) and the coil (13); the baffle assembly (8) comprises a shielding plate (8.4); the shielding plate (8.4) is W-shaped; the upper end surface of the shielding plate (8.4) on the side close to the rotor commutator (4) is in contact with the lower end of the coil (13); After welding is completed, the baffle assembly (8) is recovered and the remaining tin slag is automatically cleaned.

2. The commutator base anti-tin explosion welding device according to claim 1, characterized in that: The input pipe (9.2) is fixedly connected to one end of the inner wall of the outer shell (9.1), the output pipe (9.5) is fixedly connected to the other end of the inner wall of the outer shell (9.1), the cutting wheel body (9.3) is arranged between the input pipe (9.2) and the output pipe (9.5) through a rotating shaft, and the guide wheel (9.4) is arranged at the upper end of the output pipe (9.5).

3. The commutator base anti-tin explosion welding device according to claim 2, characterized in that: One end of the output pipe (9.5) away from the grinding wheel body (9.3) is connected to the tin segment conduit (12); the output pipe (9.5) is U-shaped; the output pipe (9.5) comprises a matching section (9.51) and a conveying section (9.52); an inclination angle is set between the matching section (9.51) and the conveying section (9.52).

4. A control method for a commutator base anti-tin explosion welding device, used to control a commutator base anti-tin explosion welding device as claimed in any one of claims 1 to 3, characterized in that: The control method specifically includes the following steps: Step 1, installation and transportation of tin wire (11) material: the wire supply wheel (10) is installed on the welding gun bracket (6), and the tin wire (11) on the wire supply wheel (10) is fed into the tin cutting device through the input pipeline (9.2); Step 2, cutting the tin wire (11): when the tin wire (11) is fed into the rolling and cutting assembly (9), the rolling and cutting assembly (9) cuts the tin wire (11) into tin segments, and the tin segments are transported from the output pipe (9.5) to the spraying assembly (7); Step 3, extending the shielding plate (8.4): The W-shaped shielding plate (8.4) extends from the baffle guide rail (8.1), extends to the top of the rotor commutator (4), fits with the lower end of the coil (13) on the rotor commutator (4), and separates the coil (13) from the welding point; Step 4, first heating: the tin section is heated to a semi-solid state by the laser heating element (7.3) for the first time, and the semi-solid solder is pushed to the soldering point by the high-speed gas by opening the gas jet switch valve (7.2); Step 5, second heating: The laser heats the solder joints for the second time to liquefy them and cool them to form full solder joints; Step 6, the shielding plate (8.4) retreats: the W-shaped shielding plate (8.4) retreats to a short distance, waiting for the next welding; Step 7, cleaning the shielding plate (8.4): Whenever the welding of N rotor commutators (4) is completed, the welding slag remaining on the shielding plate (8.4) is heated by the laser heating block (8.2), and the welding slag is removed by the scraper (8.3).

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