Laser four-station bottom welding machine

Abstract

The invention relates to the technical field of laser welding, in particular to a laser four-station bottom welding machine which comprises a machine body, fixing plates are symmetrically and fixedly connected to the two sides of the upper end face of the machine body, a control device is fixedly connected to the tops of the fixing plates, an automatic welding mechanism is arranged on the upper end face of the machine body, and an electric control cabinet is arranged on the right side of the machine body. A feeding mechanical arm is installed on the electric control cabinet, and the other end of the feeding mechanical arm is detachably connected with a clamping jaw. The automatic welding mechanism comprises a machining platform arranged on the upper end face of the machine body and located between the two fixing plates. The four stations are adopted for conducting machining and welding operation on materials, the machining efficiency is high, the equipment can achieve feeding and discharging operation of the materials without shutdown, and feeding conveying and welding machining treatment of the materials are achieved through cooperation of the conveying device and the feeding mechanical arm in the whole process; and then a set of mechanical arms are additionally arranged on the front side of the machine body to achieve discharging of the materials, a traditional manual feeding and discharging operation mode is replaced, and the material machining efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, in particular to a laser four-station bottom welding machine. Background Art

[0002] At present, most of the welding technology for thermos cups uses brazing, and a few new bottom welding machines use laser welding. However, whether it is brazing or laser welding, the traditional welding positioning device cannot rotate the clamping mechanism after fixing, and can only be solved by rotating the welding head. The welding efficiency and welding results are not ideal. After the bottom welding operation of the thermos cup, the welded cup will usually expand under the influence of the heat of the laser. If the positioning accuracy is too strict, it is very likely that the weld will get stuck in the uneven place, causing the discharge to be not smooth. However, if the positioning requirements are relaxed for smooth discharge, the positioning effect will be discounted. Since the coaxiality requirements for the bottom and the cup body are very high during welding, the design of a laser bottom welding machine with flexible clamping and rotation positioning functions is of great significance to the automation of the thermos bottom welding machine;

[0003] The invention with the announcement number CN113210845A specifically discloses a new type of thermos cup laser bottom welding machine, which relates to the field of automated manufacturing technology; the laser bottom welding machine at least comprises: a conveying device, a lifting and clamping device, a welding support, a spindle device and a welding device, wherein the welding support comprises a three-claw positioning tool; the cup bottom is placed on the conveying device, the three-claw positioning tool clamps the cup body placed on the welding support, and the cup bottom and the cup body are tightly pressed by the lifting and clamping device; the spindle device performs a lifting operation to bring the pressed cup bottom and the cup body close to the welding device, and while the cup bottom and the cup body are synchronously rotated, the welding device performs a welding operation;

[0004] During use, the device still requires manual loading and unloading, which is not only time-consuming and labor-intensive, but also increases labor intensity. There are certain safety hazards in the process of manual loading and unloading operations. At the same time, the equipment needs to be shut down for a short time during the loading and unloading process, which greatly affects the processing efficiency of the equipment.

[0005] Therefore, a laser four-station bottom welding machine is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a laser four-station bottom welding machine. The present application adopts four stations to perform material processing and welding operations. Not only is the processing efficiency high, but the equipment does not need to be shut down to realize material loading and unloading operations. The whole process is realized by cooperating with the conveying device and the loading robot arm to realize material loading and conveying, welding processing, and then a group of robots are added on the front side of the machine body to realize material unloading, replacing the traditional manual loading and unloading operation mode. The material processing efficiency is high, safe and efficient to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser four-station bottom welding machine, comprising a machine body, a fixing plate is symmetrically fixedly connected to both sides of the upper end surface of the machine body, and a control device is fixedly connected to the top of the fixing plate, an automatic welding mechanism is arranged on the upper end surface of the machine body, an electrical control cabinet is arranged on the right side of the machine body, and a feeding mechanical arm is installed on the electrical control cabinet, and a clamping claw is detachably connected to the other end of the feeding mechanical arm;

[0008] The automatic welding mechanism comprises a processing platform arranged on the upper end surface of the machine body between two fixed plates, and a conveying device is arranged on the front side of the processing platform;

[0009] The processing platform is provided with four welding areas, a group of control devices is distributed corresponding to the top of a single welding area, and a welding cavity is arranged on the surface of the welding platform corresponding to a single welding area.

[0010] Preferably, the conveying device includes a fixed frame fixed on the upper end surface of the machine body, and the fixed frame is located on the front side of the processing platform, and the two ends of the two fixed frames are rotatably connected with conveying rollers, and the two conveying rollers are wrapped with two conveyor belts on the outside, and the two conveyor belts are distributed front and back with a gap reserved in the middle, and a motor 1 is fixed on the lower side of the right fixed frame, and the output shaft of the motor 1 is transmission-connected to one end of the conveying roller through a gear.

[0011] Preferably, the clamp includes an end plate fixed to one end of the loading robot arm, and an adjustment groove is opened through the surface of the end plate. The adjustment groove is designed in an arc-shaped structure, and the adjustment groove is three groups of rings distributed at equal distances on the surface of the end plate. Connecting rods are movably connected in the three adjusting grooves, and an adjusting nut is threaded on the top of the connecting rod, and a suction cup is fixed to the bottom of the connecting rod.

[0012] Preferably, the front side of the processing platform is movably connected with a flap, the rear side of the flap is hinged to the processing platform, the number of the flaps is two, one flap corresponds to two welding areas, and one flap is located on the front side of two welding cavities. The lower end face of the flap is provided with an electric push rod 2, and the top of the electric push rod 2 is hinged to the flap, and the bottom of the electric push rod 2 is hinged to the machine body.

[0013] Preferably, an electric push rod 1 is provided on one side of the welding chamber, and the electric push rod 1 is fixed to the processing platform, the output shaft of the electric push rod 1 is vertically fixedly connected to a shift rod 1, the shift rod 1 is located on the surface of the conveyor belt, and the two electric push rods 1 are located on both sides of a flap.

[0014] Preferably, an electric push rod three is fixed on the front side of the fixed frame, and the electric push rod three corresponds to the welding cavity, the output shaft of the electric push rod three is vertically fixedly connected to a shift rod three, the shift rod three is located on the surface of the conveyor belt, and an arc-shaped limit groove is opened on the right side of the shift rod three at a position corresponding to the gap of the conveyor belt.

[0015] Preferably, the control includes a mounting plate movably connected between fixed plates, a guide column is provided through the outside of the mounting plate, an electrical cabinet is fixed to the top of the fixed plate, the top of the guide column is fixed to the electrical cabinet, and the bottom of the guide column is fixed to the processing platform.

[0016] Preferably, motor 2 is fixed at a position corresponding to the upper end surface of the mounting plate and the welding cavity, the output shaft of motor 2 extends through and extends to the lower side of the mounting plate, and a lower plate is provided on the bottom of the output shaft of motor 2, and the lower plate is fixed to the mounting plate through a connecting piece, and a calibration end is rotatably connected to the lower end surface of the lower plate, and the calibration end is designed with a conical structure and is fixedly connected to the output shaft of motor 2.

[0017] Preferably, hydraulic cylinders are symmetrically distributed and fixed in the electrical cabinet, and output ends of the hydraulic cylinders are located on both sides of the second motor and are fixedly connected to the mounting plate.

[0018] Preferably, a laser welding device is provided at the rear side of the machine body, and an output end of the laser welding gun is located at the bottom end inside the welding cavity.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This application adopts four stations to process and weld materials, which is not only efficient, but also can realize material loading and unloading operations without stopping the equipment. The whole process is realized by cooperating with the conveying device and the loading mechanical arm to realize material loading and conveying, welding and processing, and then a set of mechanical arms is added on the front side of the machine body to realize material unloading, replacing the traditional manual loading and unloading operation mode, and the material processing efficiency is high, safe and efficient;

[0021] 2. This application designs Motor 2, a lower plate, a mounting plate, a hydraulic cylinder and a calibration end, so that the cylindrical material placed in the welding cavity by the robot arm can be automatically corrected and centered by the calibration end with a conical structure, and then, through the cooperation of Motor 2 with the calibration end, the downward extrusion action of the hydraulic cylinder enables the cylindrical material and the base plate pre-added at the bottom to be rotated and welded by laser welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is the overall structural view of the present invention;

[0024] Figure 2 For the present invention Figure 1 The enlarged schematic diagram at D in the middle;

[0025] Figure 3 For the present invention Figure 1 The enlarged schematic diagram at C in the middle;

[0026] Figure 4 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0027] Figure 5 For the present invention Figure 1 Enlarged schematic diagram of point B in the middle.

[0028] Description of reference numerals:

[0029] 1. Machine body; 11. Welding chamber; 12. Processing platform; 13. Electric push rod 1; 14. Push rod 1; 15. Flip plate; 16. Electric push rod 2; 17. Electric push rod 3; 18. Push rod 3; 2. Conveying device; 21. Fixed frame; 22. Conveying roller; 23. Conveying belt; 24. Motor 1; 3. Fixed plate; 4. Control device; 41. Guide column; 42. Mounting plate; 43. Electric push rod 4; 44. Motor 2; 45. Lower plate; 46. Calibration end; 5. Electrical control cabinet; 6. Loading robot arm; 61. End plate; 62. Adjusting slot; 63. Adjusting nut; 64. Connecting rod; 65. Suction cup. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 5 , the present invention provides a technical solution:

[0032] A laser four-station bottom welding machine comprises a machine body 1, a fixing plate 3 is symmetrically fixedly connected to both sides of the upper end surface of the machine body 1, and a control device 4 is fixedly connected to the top of the fixing plate 3, an automatic welding mechanism is arranged on the upper end surface of the machine body 1, an electrical control cabinet 5 is arranged on the right side of the machine body 1, and a feeding mechanical arm 6 is installed on the electrical control cabinet 5, and the other end of the feeding mechanical arm 6 is detachably connected to a clamping claw;

[0033] The automatic welding mechanism comprises a processing platform 12 disposed on the upper end surface of the machine body 1 between two fixing plates 3, and a conveying device 2 is disposed on the front side of the processing platform 12;

[0034] The processing platform 12 is provided with four welding areas, a group of control devices 4 are distributed on the top of a single welding area, and a welding cavity 11 is arranged on the surface of the welding platform corresponding to a single welding area. A laser welding device is arranged on the rear side of the machine body 1, and the output end of the laser welding gun is located at the bottom end of the welding cavity 11.

[0035] Preferably, the conveying device 2 includes a fixed frame 21 fixed on the upper end surface of the body 1, and the fixed frame 21 is located on the front side of the processing platform 12, and the two ends of the two fixed frames 21 are rotatably connected with conveying rollers 22, and the two conveying rollers 22 are wrapped with two conveyor belts 23 on the outside, and the two conveyor belts 23 are distributed front and back with a gap reserved in the middle. A motor 24 is fixed on the lower side of the right fixed frame 21, and the output shaft of the motor 24 is transmission-connected to one end of the conveying roller 22 through a gear.

[0036] The clamp includes an end plate 61 fixed to one end of the loading robot arm 6, and an adjustment groove 62 is opened on the surface of the end plate 61. The adjustment groove 62 is designed in an arc-shaped structure, and the adjustment groove 62 is three groups of rings distributed at equal distances on the surface of the end plate 61. The design of the adjustment groove 62 is convenient for the user to adjust the position of the suction cup 65 according to the diameter of the bottom plate, so that it satisfies the adsorption and fixation of the material bottom plate. The three adjustment grooves 62 are movably connected with connecting rods 64, and the top of the connecting rod 64 is threadedly connected with an adjusting nut 63, and the bottom of the connecting rod 64 is fixed with a suction cup 65.

[0037] Specifically, Figure 4 and Figure 5As shown, the front side of the processing platform 12 is movably connected with a flap 15, the rear side of the flap 15 is hinged to the processing platform 12, the number of the flaps 15 is two, one flap 15 corresponds to two welding areas, one flap 15 is located at the front side of the two welding cavities 11, the lower end surface of the flap 15 is provided with an electric push rod 16, and the top of the electric push rod 16 is hinged to the flap 15, and the bottom of the electric push rod 16 is hinged to the body 1. One side of the welding cavity 11 is provided with an electric push rod 13, and the electric push rod 13 is hinged to the processing platform 12. The platform 12 is fixed, and the output shaft of the electric push rod 13 is vertically fixedly connected to the lever 14, and the lever 14 is located on the surface of the conveyor belt 23. The two electric push rods 13 are located on both sides of a flap 15. An electric push rod 3 17 is fixed on the front side of the fixed frame 21, and the electric push rod 3 17 corresponds to the welding cavity 11. The output shaft of the electric push rod 3 17 is vertically fixedly connected to the lever 3 18, and the lever 3 18 is located on the surface of the conveyor belt 23, and an arc-shaped limit groove is provided on the right side of the lever 3 18 at a position corresponding to the gap between the conveyor belt 23.

[0038] By adopting the above technical solution, when working, it is necessary to build a robotic arm on the front side of the body 1. The robotic arm has the ability to grab cylindrical materials, and the loading robotic arm 6 is distributed on the right side of the body 1. The materials used for welding the bottom of the cylindrical object are distributed on one side of the loading robotic arm 6. Then the external control device controls the body 1 as a whole, the electrical control cabinet 5 and the built robotic arm to cooperate in automatic operation. First, the loading robotic arm 6 is controlled to adsorb the bottom plate used for welding through the suction cup 65 at the bottom of the connecting rod 64, and then the loading robotic arm 6 transfers and transports it to the surface of the conveyor belt 23 in the conveying device 2, and the upper surface of the reserved gap. Then the suction cup 65 is controlled to lose adsorption, and the bottom plate located on the surface of the conveyor belt 23 is conveyed to the left. After the bottom plate is conveyed to the designated welding station, the electric push rod 3 17 at the designated station is controlled to move downward. At this time, the lever 3 18 at the output end of the electric push rod 3 17 contacts with the material bottom plate, and the material bottom plate contacts with the arc-shaped limiting groove on the surface of the lever 3 18. In this state, the conveyor belt 23 is always transported without stopping. Then the electric push rod 1 13 is controlled to pull the lever 1 14 backward to push the material bottom plate limited by the lever 3 18 to the surface of the flap 15. Then the electric push rod 2 16 at the bottom of the flap 15 is controlled to extend and flip through the flap 15 to the welding chamber 11. At this time, the material bottom plate located on the flap 15 slides horizontally into the welding chamber 11.

[0039] Specifically, Figure 5 and Figure 1As shown, the control comprises a mounting plate 42 movably connected between the fixed plates 3, a guide column 41 is provided on the outside of the mounting plate 42, an electrical cabinet is fixed on the top of the fixed plate 3, the top of the guide column 41 is fixed to the electrical cabinet, and the bottom of the guide column 41 is fixed to the processing platform 12, a motor 2 44 is fixed at the upper end surface of the mounting plate 42 corresponding to the welding cavity 11, the output shaft of the motor 2 44 extends through and extends to the lower side of the mounting plate 42, and a lower plate 45 is provided on the bottom of the output shaft of the motor 2 44, and the lower plate 45 is fixed to the mounting plate 42 through a connecting piece, the lower end surface of the lower plate 45 is rotatably connected with a calibration end 46, and the calibration end 46 is designed in a conical structure and is fixedly connected to the output shaft of the motor 2 44, and hydraulic cylinders are symmetrically distributed and fixed in the electrical cabinet, and the output ends of the hydraulic cylinders are located on both sides of the motor 2 44 and are fixedly connected to the mounting plate 42.

[0040] By adopting the above technical solution, the constructed robotic arm grabs two cylindrical materials into the welding chamber 11 at one time, and then the hydraulic cylinder controls the mounting plate 42 to move downward, driving the motor 2 44 to move downward, so that the calibration end 46 contacts the top opening of the cylindrical material in the welding chamber 11, and the robotic arm releases the material at this time, and then the material stands upright in the welding chamber 11 and is automatically corrected under the action of the conical structure of the calibration end 46, and the bottom is corrected with the material bottom plate, and then the motor drives the calibration end 46 to drive the cylindrical material to rotate slowly in the welding chamber 11, and then the cylindrical material and the material bottom plate are welded by the laser welding gun of the rear laser welding equipment. After the welding is completed, the mounting plate 42, the motor 2 44 and the calibration end 46 are reset, and the robotic arm takes out the processed material from the welding chamber 11, and continues to feed the next group of cylindrical borings into the welding chamber 11, and repeats this cycle to realize the welding processing of the material.

[0041] Working principle: When working, it is necessary to build a robotic arm on the front side of the body 1. The robotic arm has the ability to grab cylindrical materials, and the loading robotic arm 6 is distributed on the right side of the body 1. The materials used for welding the bottom of the cylindrical object are distributed on one side of the loading robotic arm 6. Then the external control equipment controls the body 1 as a whole, the electrical control cabinet 5 and the built robotic arm to cooperate in automatic operation. First, the loading robotic arm 6 is controlled to adsorb the bottom plate used for welding through the suction cup 65 at the bottom of the connecting rod 64, and then the loading robotic arm 6 transfers and transports it to the surface of the conveyor belt 23 in the conveying device 2, and the upper surface of the reserved gap. Then the suction cup 65 is controlled to lose adsorption, and the bottom plate is located on the surface of the conveyor belt 23 and is transported to the left. After the bottom plate is transported to the designated welding station, the electric push rod 3 17 at the designated station is controlled to move down. At this time, the lever 3 18 at the output end of the electric push rod 3 17 contacts the material bottom plate, and the material bottom plate contacts the arc-shaped limiting groove on the surface of the lever 3 18. In this state, the conveyor belt 23 is always transported without stopping. Then the electric push rod 1 13 is controlled to pull the lever 1 14 backward to push the material bottom plate limited by the lever 3 18 to the surface of the flap 15, and then the electric push rod 2 16 at the bottom of the flap 15 is controlled to extend and flip to the welding chamber 11 through the flap 15. At this time, the material bottom plate on the flap 15 slides horizontally into the welding chamber 11;

[0042] The constructed robotic arm grabs two cylindrical materials into the welding chamber 11 at one time, and then the hydraulic cylinder controls the mounting plate 42 to move downward, driving the motor 2 44 to move downward, so that the calibration end 46 contacts the top opening of the cylindrical material in the welding chamber 11, and the robotic arm releases the material at this time, and then the material stands upright in the welding chamber 11 and is automatically corrected under the action of the conical structure of the calibration end 46, and the bottom is corrected with the material bottom plate, and then the motor drives the calibration end 46 to drive the cylindrical material to rotate slowly in the welding chamber 11, and then the cylindrical material and the material bottom plate are welded by the laser welding gun of the rear laser welding equipment. After the welding is completed, the mounting plate 42, the motor 2 44 and the calibration end 46 are reset, and the robotic arm takes out the processed material from the welding chamber 11, and continues to feed the next group of cylindrical borings into the welding chamber 11, and repeats this cycle to realize the welding processing of the material.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser four-station bottom welding machine, comprising a machine body (1), characterized in that: The upper end surface of the machine body (1) is symmetrically fixedly connected to a fixing plate (3) on both sides, and the top of the fixing plate (3) is fixedly connected to a control device (4), the upper end surface of the machine body (1) is provided with an automatic welding mechanism, the right side of the machine body (1) is provided with an electrical control cabinet (5), and a feeding mechanical arm (6) is installed on the electrical control cabinet (5), and the other end of the feeding mechanical arm (6) is detachably connected to a clamping claw; The automatic welding mechanism comprises a processing platform (12) arranged on the upper end surface of the machine body (1) and located between two fixing plates (3), and a conveying device (2) is arranged on the front side of the processing platform (12); The processing platform (12) is provided with four welding areas at different workstations, a group of control devices (4) is distributed corresponding to the top of a single welding area, and a welding cavity (11) is provided on the surface of the welding platform corresponding to a single welding area.

2. A laser four-station bottom welding machine according to claim 1, characterized in that: The conveying device (2) comprises a fixed frame (21) fixed to the upper end surface of the machine body (1), and the fixed frame (21) is located in front of the processing platform (12). The two ends of the two fixed frames (21) are rotatably connected with conveying rollers (22). The two conveying rollers (22) are wrapped with two conveying belts (23) outside. The two conveying belts (23) are distributed front and back with a gap reserved in the middle. A motor (24) is fixed on the lower side of the right fixed frame (21), and the output shaft of the motor (24) is transmission-connected to one end of the conveying roller (22) through a gear.

3. A laser four-station bottom welding machine according to claim 2, characterized in that: The clamp includes an end plate (61) fixed to one end of a loading robot arm (6), an adjustment groove (62) is provided through the surface of the end plate (61), the adjustment groove (62) is designed in an arc-shaped structure, and the adjustment groove (62) is three groups of rings distributed at equal distances on the surface of the end plate (61), and connecting rods (64) are movably connected in the three adjustment grooves (62), the top of the connecting rod (64) is threadedly connected to an adjustment nut (63), and a suction cup (65) is fixed to the bottom of the connecting rod (64).

4. The laser four-station bottom welding machine according to claim 3 is characterized in that: The front side of the processing platform (12) is movably connected with a flap (15), and the rear side of the flap (15) is hinged to the processing platform (12). There are two flaps (15), one flap (15) corresponds to two welding areas, and one flap (15) is located at the front side of two welding cavities (11). The lower end surface of the flap (15) is provided with an electric push rod 2 (16), and the top of the electric push rod 2 (16) is hinged to the flap (15), and the bottom of the electric push rod 2 (16) is hinged to the machine body (1).

5. The laser four-station bottom welding machine according to claim 4, characterized in that: An electric push rod (13) is provided on one side of the welding chamber (11), and the electric push rod (13) is fixed to the processing platform (12). The output shaft of the electric push rod (13) is vertically fixedly connected to a shifting rod (14), and the shifting rod (14) is located on the surface of the conveyor belt (23). The two electric push rods (13) are located on both sides of a flap (15).

6. A laser four-station bottom welding machine according to claim 5, characterized in that: An electric push rod 3 (17) is fixed on the front side of the fixing frame (21), and the electric push rod 3 (17) corresponds to the welding cavity (11). The output shaft of the electric push rod 3 (17) is vertically fixedly connected to a shifting rod 3 (18). The shifting rod 3 (18) is located on the surface of the conveyor belt (23), and an arc-shaped limiting groove is provided on the right side of the shifting rod 3 (18) at a position corresponding to the gap between the conveyor belt (23).

7. A four-station laser bottom welding machine according to claim 6, characterized in that: The control system comprises a mounting plate (42) movably connected between the fixing plates (3), a guide column (41) is provided through the outside of the mounting plate (42), an electrical cabinet is fixed to the top of the fixing plate (3), the top of the guide column (41) is fixed to the electrical cabinet, and the bottom of the guide column (41) is fixed to the processing platform (12).

8. The four-station laser bottom welding machine according to claim 7, characterized in that: A second motor (44) is fixed at a position corresponding to the upper end surface of the mounting plate (42) and the welding cavity (11); the output shaft of the second motor (44) extends through the lower side of the mounting plate (42); a lower plate (45) is provided at the bottom of the output shaft of the second motor (44); the lower plate (45) is fixed to the mounting plate (42) via a connecting piece; a calibration end (46) is rotatably connected to the lower end surface of the lower plate (45); the calibration end (46) is designed in a conical structure and is fixedly connected to the output shaft of the second motor (44).

9. A laser four-station bottom welding machine according to claim 8, characterized in that: Hydraulic cylinders are symmetrically distributed and fixed in the electrical cabinet, and the output ends of the hydraulic cylinders are located on both sides of the second motor (44) and are fixedly connected to the mounting plate (42).

10. A four-station laser bottom welding machine according to claim 9, characterized in that: A laser welding device is arranged on the rear side of the machine body (1), and the output end of the laser welding gun is located at the bottom end inside the welding cavity (11).

Images