Laser welding machine for explosion-proof valve of cylindrical battery

Abstract

The utility model discloses a cylindrical battery explosion-proof valve laser welding machine which comprises a rotating assembly, a visual inspection assembly, a laser welding assembly and a defective product discharging assembly which are installed on a workbench, the rotating assembly comprises a rotating disc and a vacuum adsorption jig, and a first station, a second station, a third station and a fourth station are arranged on the periphery of the rotating disc. The four groups of vacuum adsorption jigs are uniformly distributed at the upper end of the turntable and are used for fixing a cylindrical battery explosion-proof valve; the visual detection assembly is located at the second station and used for detecting the front and back of the to-be-welded cylindrical battery explosion-proof valve; the laser welding assembly is located at a third station and used for conducting laser welding on the cylindrical battery anti-explosion valve without errors in visual front and back detection; the defective product discharging assembly is located at the fourth station and used for taking down the cylindrical battery anti-explosion valve with errors in visual front and back detection. The device improves the welding efficiency, is convenient to change models, is compatible with different models, detects the directions of explosion-proof valves, realizes automatic blanking of defective products, and is convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser welding equipment technical field, especially a cylindrical battery explosion -proof valve laser welding machine. BACKGROUND

[0002] The explosion -proof valve is the thin -walled valve body on the battery sealing plate, when the battery internal pressure exceeds the specified value, the explosion -proof valve body breaks, releases the pressure, avoids the battery explosion. Its structure is ingenious, usually through laser welding two aluminum metal sheet firmly welded together, forms a complete explosion -proof valve body.

[0003] In the battery explosion -proof valve welding process, need to guarantee the leakproofness of weld, strictly control the heat input, make the breakage pressure value of weld stable in a certain range. When the battery internal pressure rises to a certain value, the aluminum sheet will break from the designed recess position, prevents the further expansion of battery and causes the explosion.

[0004] Laser welding is a kind of high -efficient precision welding method using high -energy density laser beam as heat source, through using laser beam to fuse two aluminum metal sheet workpieces together. The welding needs to pay attention to: selecting appropriate laser parameters, such as power, speed, focal length etc. to adapt to the thickness, shape, material quality etc. of aluminum plate, guarantee the stability, efficiency and quality of welding. Control the assembly accuracy, clamping force, cleanliness etc. of aluminum plate, avoid producing defects, cracks, spatter etc. problems. Surface treatment is carried out to aluminum plate before welding, removes oxidation layer, oil stain and other impurities, improves the absorption rate and reflectivity of laser. Auxiliary gas, such as nitrogen, argon etc. is used, protects the weld from the influence of oxygen and water vapor in air, prevents oxidation and hydrolysis reaction, improves the strength and toughness of weld. Select appropriate laser welding mode, such as pulse laser welding, continuous laser welding, composite laser welding etc. according to different explosion -proof valve structure and material.

[0005] The traditional cylindrical battery explosion -proof valve laser welding equipment still has the following defects: first, there is the problem of low welding efficiency, inconvenient model changing, poor compatibility, difficult to adapt to the welding requirements of different models of cylindrical battery explosion -proof valve. Second, there is the problem that the incorrect placement direction of explosion -proof valve cannot be found in time when manually feeding, leading to the incorrect welding direction of two aluminum metal sheets, and then leading to the decline of welding quality and the production of defective products. Third, the problem of automatic unloading of defective products has not been solved, relying on manual operation, leading to the low degree of overall production automation, unable to meet the needs of large -scale production. Fourth, the transmission, focusing and welding precision control of laser beam are not accurate enough, affecting the welding quality and stability. UTILITY MODEL CONTENTS

[0006] The utility model wants to solve the technical problem according to the above-mentioned prior art's insufficient, solves traditional cylindrical battery explosion valve laser welding equipment welding efficiency, change type is inconvenient, compatibility is poor, cannot detect explosion valve and place direction error, defective product unloading relies on artificial and laser beam control is not accurate etc.

[0007] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a cylindrical battery explosion valve laser welding machine, which comprises a workbench, a rotating assembly, a visual detection assembly, a laser welding assembly and a defective product unloading assembly installed on the workbench, the rotating assembly comprises a turntable and a vacuum adsorption jig, the periphery of the turntable is provided with a first station, a second station, a third station and a fourth station, the vacuum adsorption jig comprises four groups, is uniformly distributed on the upper end of the turntable, and is matched with the first station, the second station, the third station and the fourth station respectively for fixing the cylindrical battery explosion valve; the first station is used for the operator to load the cylindrical battery explosion valve to be welded on the vacuum adsorption jig, the visual detection assembly is located at the second station and comprises a visual positive and negative detection camera, the visual positive and negative detection camera is used for detecting the positive and negative of the cylindrical battery explosion valve to be welded after being loaded by the operator of the first station; the laser welding assembly is located at the third station and comprises a welding mechanism, the welding mechanism performs laser welding on the cylindrical battery explosion valve to be welded that is detected correctly by the visual positive and negative detection camera and does not perform laser welding on the cylindrical battery explosion valve to be welded that is detected incorrectly; the defective product unloading assembly is located at the fourth station and comprises a vacuum unloading suction disc and a unloading collection box, the unloading collection box is located between the fourth station and the first station, and the vacuum unloading suction disc takes down the cylindrical battery explosion valve to be welded that is detected incorrectly by the visual positive and negative detection camera from the vacuum adsorption jig of the fourth station and places it in the unloading collection box.

[0008] As a further elaboration of the utility model:

[0009] The rotating assembly further comprises a rotating motor, the turntable is arranged in the middle of the workbench and is flush with the workbench, the rotating motor is arranged at the lower end of the middle of the turntable, the transmission shaft of the rotating motor is connected with the turntable and drives the turntable to rotate relative to the workbench, the middle of the turntable is provided with a through hole, the upper end of the through hole is provided with a gantry fixing seat, and the transmission shaft of the rotating motor passes through the through hole and is connected with the gantry fixing seat to drive the turntable to rotate relative to the workbench.

[0010] The vacuum adsorption jig comprises a jig base, a cover plate jig, a vacuum fixing chuck and positioning pins, the jig base is fixedly connected with a turntable, and a chuck recess is arranged in the middle of the jig base and recessed inward, the vacuum fixing chuck is arranged in the chuck recess, the positioning pins are two and are arranged at the left and right ends of the jig base and extend upward, the cover plate jig is matched with the jig base, and positioning pin holes matched with the positioning pins are arranged at the left and right ends of the cover plate jig, under the cooperation of the positioning pins, the positioning pin holes and the vacuum fixing chuck, the cover plate jig is adsorbed and fixed or separated from the jig base, and more than one acupoint is arranged on the cover plate jig, and the acupoint is used for containing and fixing the cylindrical battery explosion-proof valve.

[0011] The visual detection assembly further comprises a visual support seat, a first X-axis servo module and a first Y-axis servo module installed on the visual support seat, the visual support seat is fixedly installed on the workbench, the visual positive and negative detection camera is installed on the first X-axis servo module and the first Y-axis servo module and can move forward, backward, left and right relative to the workbench under the driving action of the first X-axis servo module and the first Y-axis servo module, and the positive and negative of the cylindrical battery explosion-proof valve to be welded on the second station vacuum adsorption jig are detected.

[0012] The laser welding assembly further comprises a welding support seat, a second X-axis servo module, a second Y-axis servo module and a Z-axis servo module installed on the welding support seat, the welding support seat is fixedly installed on the workbench, the welding mechanism is installed on the second X-axis servo module, the second Y-axis servo module and the Z-axis servo module and can move forward, backward, left and right and up and down relative to the workbench under the driving action of the second X-axis servo module, the second Y-axis servo module and the Z-axis servo module, and the cylindrical battery explosion-proof valve to be welded on the third station vacuum adsorption jig is subjected to laser welding.

[0013] The defective product discharging assembly further comprises a discharging support seat, a third X-axis servo module, a third Y-axis servo module and a discharging cylinder installed on the discharging support seat, the discharging support seat is fixedly installed on the workbench, the discharging cylinder is vertically installed on the third X-axis servo module and the third Y-axis servo module and can move forward, backward, left and right relative to the workbench under the driving action of the third X-axis servo module and the third Y-axis servo module, a vacuum discharging chuck is connected to the lower end of the discharging cylinder, and the third X-axis servo module, the third Y-axis servo module, the discharging cylinder and the vacuum discharging chuck cooperate to take the cylindrical battery explosion-proof valve to be welded with errors detected by the visual positive and negative detection camera from the fourth station vacuum adsorption jig and place the cylindrical battery explosion-proof valve in a discharging collection box.

[0014] The rotating motor is a DD rotating motor, the workbench is installed at the upper end of the rack, a protective cover is arranged on the outer periphery of the rack, and universal wheels are arranged at the lower end of the periphery of the rack.

[0015] The cleaning mechanism and the control mechanism are electrically connected with the rotating assembly, the visual detection assembly, the laser welding assembly, the defective product discharging assembly and the cleaning mechanism and control the operation thereof.

[0016] The utility model discloses the four -station carousel form has realized the continuous operation of feeding, detection, welding and discharging, improved welding efficiency, can satisfy the demand of large -scale production. The equipment adopts the modular design, makes the change type more convenient, can easily adapt to the welding requirement of different model cylindrical battery explosion -proof valve, has stronger compatibility. Through the explosion -proof valve visual positive and negative detection assembly, can discover the problem of the explosion -proof valve placing direction error when manual feeding in time, avoids the welding quality decline caused by the welding direction error, reduces the production of defective product. The laser welding cylinder, laser source, galvanometer and field lens in the laser welding assembly cooperate with each other, can accurately control the transmission, focusing and welding precision of laser beam, and the inert gas blown by the cleaning mechanism can effectively protect the weld, prevent oxidation and hydrolysis reaction, further improve the strength and toughness of the weld, thereby ensuring the welding quality. The defective product discharging assembly can automatically throw the explosion -proof valve with detection error to the discharging collection box, realizes the automatic discharging of defective product, reduces manual operation, improves the degree of automation of overall production. The whole machine adopts the DD motor to drive the rotation of carousel, has the advantages of high positioning accuracy and quick response. The rotating assembly, visual detection assembly, laser welding assembly and defective product discharging assembly are installed on the workbench, and the workbench is installed on the upper end of the rack, effectively saving the space. The cover plate fixture and fixture base are connected through vacuum fixing suction cup and positioning pin, and the cover plate fixture with the material is placed into the fixture base by manual operation, convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the first angle exploded view of the utility model.

[0018] Figure 2 It is the second angle exploded view of the utility model.

[0019] Figure 3 It is the third angle exploded view of the utility model.

[0020] Figure 4 It is the fourth angle exploded view of the utility model.

[0021] Figure 5 It is Figure 3 It is the enlarged structure schematic view of part A of the utility model.

[0022] Figure 6 For Figure 3 Part B of the enlarged structure diagram.

[0023] Figure 7 For Figure 4 Part C of the enlarged structure diagram.

[0024] Figure 8 For Figure 4 Part D of the enlarged structure diagram.

[0025] In the figure: 1, workbench; 2, rotary table; 3, jig base; 4, cover jig; 5, positioning pin; 6, transmission shaft; 7, visual positive and negative detection camera; 8, laser welding cylinder; 9, vacuum blanking chuck; 10, blanking collection box; 11, gantry fixing base; 12, chuck groove; 13, positioning pin hole; 14, visual support base; 15, first X-axis servo module; 16, first Y-axis servo module; 17, welding support base; 18, second X-axis servo module; 19, second Y-axis servo module; 20, Z-axis servo module; 21, blanking support base; 22, third X-axis servo module; 23, third Y-axis servo module; 24, blanking cylinder; 25, protective cover; 26, universal wheel; 27, inert gas air outlet. DETAILED DESCRIPTION

[0026] The structure principle and working principle of the utility model will be further explained in detail below in combination with the drawings.

[0027] As the first part of the utility model:

[0028] For example Figures 1-8As shown in the utility model discloses a cylindrical battery explosion-proof valve laser welding machine, including worktable 1, install on the rotating assembly of worktable 1, visual detection assembly, laser welding assembly and defective product blanking assembly, the rotating assembly includes carousel 2 and vacuum adsorption fixture, carousel 2's all around from the front end of worktable 1 clockwise evenly is equipped with first station, second station, third station and fourth station, the vacuum adsorption fixture includes four groups, evenly distributes in the upper end of carousel 2, and is matched with first station, second station, third station and fourth station respectively, for fixed cylindrical battery explosion-proof valve, first station is used for operating personnel to be welded cylindrical battery explosion-proof valve loading on the vacuum adsorption fixture, the visual detection assembly is located at second station, including visual positive and negative detection camera 7, the visual positive and negative detection camera 7 is used to detect the positive and negative of the cylindrical battery explosion-proof valve to be welded after the loading of first station operating personnel, the laser welding assembly is located at third station, including welding mechanism, the welding mechanism carries out laser welding to the cylindrical battery explosion-proof valve to be welded without error of visual positive and negative detection camera 7 detection, and does not carry out laser welding to the cylindrical battery explosion-proof valve to be welded with error of detection, the defective product blanking assembly is located at fourth station, including vacuum blanking chuck 9 and blanking collection box 10, the blanking collection box 10 is located between fourth station and first station, the vacuum blanking chuck 9 removes the cylindrical battery explosion-proof valve to be welded with error of visual positive and negative detection camera 7 detection from fourth station vacuum adsorption fixture and places in blanking collection box 10.

[0029] As Figure 8 Shown, the rotating assembly still includes rotating motor (not shown in the drawing), carousel 2 sets up in the middle of worktable 1 and is flush with worktable 1, rotating motor sets up in the middle lower end of carousel 2, and its transmission shaft 6 is connected with carousel 2 and drives carousel 2 clockwise rotation relative to worktable 1, the middle of carousel 2 is equipped with through-hole, and the upper end of through-hole is equipped with gantry fixed seat 11, the transmission shaft 6 of rotating motor passes through the through-hole and is connected with gantry fixed seat 11 to drive carousel 2 clockwise rotation relative to worktable 1.

[0030] As Figure 7As shown, the vacuum adsorption jig includes a jig base 3, a cover plate jig 4, a vacuum fixing chuck (not shown in the figure) and positioning pins 5, the jig base 3 is fixedly connected with the turntable 2, and a chuck recess 12 is arranged in the middle of the jig base 3 and recessed inwardly, the vacuum fixing chuck is arranged in the chuck recess 12, the positioning pins 5 include two and are arranged at the left and right ends of the jig base 3 and extend upwardly, the cover plate jig 4 is matched with the jig base 3, and positioning pin holes 13 matched with the positioning pins 5 are arranged at the left and right ends of the cover plate jig 4, under the cooperation of the positioning pins 5, the positioning pin holes 13 and the vacuum fixing chuck, the cover plate jig 4 is adsorbed and fixed or separated from the jig base 3, and more than one acupoint is arranged on the cover plate jig 4, the acupoint is used for containing and fixing the cylindrical battery explosion-proof valve, and in the embodiment, the acupoint includes ten and is evenly distributed on the cover plate jig 4.

[0031] As shown in the figure, Figure 5 The visual detection assembly further includes a visual support seat 14, a first X-axis servo module 15 and a first Y-axis servo module 16 installed on the visual support seat 14, the visual support seat 14 is fixedly installed on the workbench 1, the visual positive and negative detection camera 7 is installed on the first X-axis servo module 15 and the first Y-axis servo module 16 and can move forward, backward, left and right relative to the workbench 1 under the driving action of the first X-axis servo module 15 and the first Y-axis servo module 16, and the positive and negative of the cylindrical battery explosion-proof valve to be welded on the second station vacuum adsorption jig are detected.

[0032] As shown in the figure, Figure 8 The laser welding assembly further includes a welding support seat 17, a second X-axis servo module 18, a second Y-axis servo module 19 and a Z-axis servo module 20 installed on the welding support seat 17, the welding support seat 17 is fixedly installed on the workbench 1, the welding mechanism is installed on the second X-axis servo module 18, the second Y-axis servo module 19 and the Z-axis servo module 20 and can move forward, backward, left and right, up and down relative to the workbench 1 under the driving action of the second X-axis servo module 18, the second Y-axis servo module 19 and the Z-axis servo module 20, and the cylindrical battery explosion-proof valve to be welded on the third station vacuum adsorption jig is laser welded.

[0033] As shown in the figure, Figure 6As shown, the defective product discharging assembly further comprises a discharging support base 21, a third X-axis servo module 22, a third Y-axis servo module 23 and a discharging cylinder 24 installed on the discharging support base 21, the discharging support base 21 is fixedly installed on the workbench 1, the discharging cylinder 24 is vertically installed on the third X-axis servo module 22 and the third Y-axis servo module 23 and can move forward, backward, leftward and rightward relative to the workbench 1 under the driving action of the third X-axis servo module 22 and the third Y-axis servo module 23, the vacuum discharging suction disc 9 is connected to the lower end of the discharging cylinder 24, and the third X-axis servo module 22, the third Y-axis servo module 23, the discharging cylinder 24 and the vacuum discharging suction disc 9 cooperate to take the cylindrical battery explosion-proof valve to be welded with errors detected by the visual positive and negative detection camera 7 from the fourth station vacuum suction jig and place it in the discharging collection box 10.

[0034] As shown in the drawings, Figures 1-4 The rotating motor is a DD rotating motor, the workbench 1 is installed on the upper end of the rack, the outer periphery of the rack is provided with a protective cover 25, and the lower end of the periphery of the rack is provided with universal wheels 26.

[0035] As shown in the drawings, Figure 8 Further comprising a cleaning mechanism and a control mechanism (not shown in the drawings), the cleaning mechanism is located on the workbench 1 at the rear end of the third station and comprises an inert gas air outlet 27, the inert gas air outlet 27 is used for blowing inert gas when the welding mechanism performs laser welding on the cylindrical battery explosion-proof valve to be welded, so as to protect the weld from oxidation and hydrolysis reaction, improve the strength and toughness of the weld, and the control mechanism is electrically connected with the rotating assembly, the visual detection assembly, the laser welding assembly, the defective product discharging assembly and the cleaning mechanism and controls the operation thereof.

[0036] As a second technical problem, as the second part of the utility model: a welding method of the cylindrical battery explosion-proof valve laser welding machine, the steps are as follows:

[0037] a. The rotating motor drives the rotating disc 2 to rotate clockwise relative to the workbench 1, and the operator fixes the cover jig 4 loaded with the cylindrical battery explosion-proof valve to be welded on the upper end of the jig base 3 under the cooperation of the positioning pins 5, the positioning pin holes 13 and the vacuum fixing suction disc at the first station;

[0038] b. The rotating disc 2 rotates the vacuum suction jig with completed feeding to the second station, the visual positive and negative detection camera 7 detects the positive and negative of the cylindrical battery explosion-proof valve to be welded and feeds back the positive and negative signal information to the control mechanism;

[0039] c. After the visual positive and negative detection is completed, the turntable 2 rotates the vacuum suction jig to the third station, the welding mechanism performs laser welding on the cylindrical battery explosion-proof valve to be welded which is detected correctly by the visual positive and negative detection camera 7, and does not perform laser welding on the cylindrical battery explosion-proof valve to be welded which is detected incorrectly, and the cleaning mechanism blows inert gas to protect the weld to prevent oxidation and hydrolysis reaction during laser welding;

[0040] d. After the laser welding is completed, the turntable 2 rotates the vacuum suction jig to the fourth station, and the vacuum unloading suction disc 9 takes the cylindrical battery explosion-proof valve to be welded which is detected incorrectly by the visual positive and negative detection camera 7 from the vacuum suction jig and places it in the unloading collection box 10;

[0041] e. After the defective product unloading is completed, the turntable 2 rotates the vacuum suction jig to the first station, the operator first takes the cover jig 4 loaded with the welded cylindrical battery explosion-proof valve from the jig base 3, and then fixes the cover jig 4 loaded with the cylindrical battery explosion-proof valve to be welded to the upper end of the jig base 3 under the cooperation of the positioning pin 5, the positioning pin hole 13 and the vacuum fixing suction disc, and the turntable 2 drives the vacuum suction jig to repeat the above operation.

[0042] Further, the welding mechanism includes a laser welding cylinder 8, a laser source (not shown in the figure), a galvanometer (not shown in the figure) and a field lens (not shown in the figure), the laser source is used to generate a laser beam, the laser welding cylinder 8 is connected to the rear end of the laser source and is used to preliminarily transmit, collimate and partially focus the laser beam to ensure that the laser beam can be stably transmitted in a specific direction, the laser beam processed by the laser welding cylinder 8 first reaches the galvanometer and then reaches the field lens, and the galvanometer and the field lens cooperate with the laser beam to complete the welding task during the laser welding process, the galvanometer is used to guide the laser beam to realize rapid and accurate scanning welding in the direction of the cylindrical battery explosion-proof valve to be welded, and the field lens is used to focus the laser beam to the accurate position of the cylindrical battery explosion-proof valve to be welded to improve the energy density of the laser and ensure the welding quality.

[0043] The above is only a preferred embodiment of the present application, and any slight modification, equivalent change and modification made according to the technical scheme of the present application to the above embodiment all belong to the scope of the technical scheme of the present application.

Claims

1. A laser welding machine for explosion-proof valves of cylindrical batteries, characterized in that: The system includes a workbench, a rotating assembly, a vision inspection assembly, a laser welding assembly, and a defective product unloading assembly mounted on the workbench. The rotating assembly includes a turntable and a vacuum suction fixture. The turntable has four stations: a first station, a second station, a third station, and a fourth station. The vacuum suction fixture comprises four sets, evenly distributed on the upper end of the turntable and corresponding to the first, second, third, and fourth stations, respectively, for fixing cylindrical battery explosion-proof valves. The first station is used by the operator to load the cylindrical battery explosion-proof valves to be welded onto the vacuum suction fixture. The vision inspection assembly is located at the second station and includes a forward and reverse vision inspection camera for inspecting... The first station measures the orientation of the cylindrical battery explosion-proof valves to be welded after being loaded by the operator. The laser welding assembly, located at the third station, includes a welding mechanism. This mechanism performs laser welding on the cylindrical battery explosion-proof valves that pass the visual orientation detection camera's inspection, but does not perform laser welding on those that fail the inspection. The defective product unloading assembly, located at the fourth station, includes a vacuum unloading suction cup and an unloading collection box. The unloading collection box is located between the fourth and first stations. The vacuum unloading suction cup removes the cylindrical battery explosion-proof valves that fail the visual orientation detection camera's inspection from the vacuum suction fixture at the fourth station and places them in the unloading collection box.

2. The laser welding machine for a cylindrical battery explosion-proof valve according to claim 1, characterized in that: The rotating assembly also includes a rotary motor. The turntable is located in the middle of the worktable and is flush with the worktable. The rotary motor is located at the lower end of the middle of the turntable. Its drive shaft is connected to the turntable and drives the turntable to rotate relative to the worktable. The turntable has a through hole in the middle and a gantry fixing seat at the upper end of the through hole. The drive shaft of the rotary motor passes through the through hole and is connected to the gantry fixing seat to drive the turntable to rotate relative to the worktable.

3. The laser welding machine for a cylindrical battery explosion-proof valve according to claim 2, characterized in that: The vacuum adsorption fixture includes a fixture base, a cover fixture, a vacuum fixing suction cup, and positioning pins. The fixture base is fixedly connected to a turntable, and has an inwardly recessed suction cup groove in its middle. The vacuum fixing suction cup is disposed in the suction cup groove. There are two positioning pins, which are respectively disposed at the left and right ends of the fixture base and extend upward. The cover fixture matches the fixture base, and has positioning pin holes at its left and right ends that match the positioning pins. Under the combined action of the positioning pins, positioning pin holes, and vacuum fixing suction cup, the cover fixture is adsorbed and fixed or desorbed and separated from the fixture base. The cover fixture has one or more acupoints, which are used to hold and fix the cylindrical battery explosion-proof valve.

4. The laser welding machine for a cylindrical battery explosion-proof valve according to claim 3, characterized in that: The vision inspection component also includes a vision support base, a first X-axis servo module and a first Y-axis servo module mounted on the vision support base. The vision support base is fixedly mounted on the worktable. The vision front and back inspection camera is mounted on the first X-axis servo module and the first Y-axis servo module, and can move back and forth and left and right relative to the worktable under the drive of the first X-axis servo module and the first Y-axis servo module to inspect the front and back of the cylindrical battery explosion-proof valve to be welded on the vacuum adsorption fixture of the second station.

5. The laser welding machine for a cylindrical battery explosion-proof valve according to claim 4, characterized in that: The laser welding assembly also includes a welding support base, a second X-axis servo module, a second Y-axis servo module, and a Z-axis servo module mounted on the welding support base. The welding support base is fixedly mounted on the worktable, and the welding mechanism is mounted on the second X-axis servo module, the second Y-axis servo module, and the Z-axis servo module. Under the action of the second X-axis servo module, the second Y-axis servo module, and the Z-axis servo module, the welding mechanism can move relative to the worktable in all directions (front, back, left, right, up, and down) to perform laser welding on the cylindrical battery explosion-proof valve to be welded on the vacuum adsorption fixture of the third station.

6. The laser welding machine for a cylindrical battery explosion-proof valve according to claim 5, characterized in that: The defective product unloading assembly also includes an unloading support base, a third X-axis servo module, a third Y-axis servo module, and an unloading cylinder mounted on the unloading support base. The unloading support base is fixedly mounted on the worktable. The unloading cylinder is vertically mounted on the third X-axis servo module and the third Y-axis servo module, and can move back and forth and left and right relative to the worktable under the action of the third X-axis servo module and the third Y-axis servo module. A vacuum unloading suction cup is connected to the lower end of the unloading cylinder. The third X-axis servo module, the third Y-axis servo module, the unloading cylinder, and the vacuum unloading suction cup work together to remove the cylindrical battery explosion-proof valves that have been incorrectly detected by the visual front and back inspection camera from the vacuum adsorption fixture of the fourth station and place them in the unloading collection box.

7. A laser welding machine for a cylindrical battery explosion-proof valve according to claim 2, characterized in that: The rotary motor is a DD rotary motor. The worktable is installed on the upper part of the frame. The outer perimeter of the frame is equipped with a protective cover, and the lower part of the frame is equipped with casters.

8. The laser welding machine for a cylindrical battery explosion-proof valve according to claim 7, characterized in that: It also includes a cleaning mechanism and a control mechanism. The cleaning mechanism is located on the workbench at the rear of the third station and includes an inert gas outlet. The inert gas outlet is used by the welding mechanism to blow out inert gas when performing laser welding on the cylindrical battery explosion-proof valve to be welded, so as to protect the weld from oxidation and hydrolysis reactions and improve the strength and toughness of the weld. The control mechanism is electrically connected to and controls the operation of the rotating component, the vision inspection component, the laser welding component, the defective product unloading component and the cleaning mechanism.

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