A steel structure laser welding assembly device and laser welding process

Abstract

The present invention relates to the field of laser welding technology, and in particular, provides a steel structure laser welding assembly device and a laser welding process. The steel structure laser welding assembly device includes a welding platform, a manipulator located above the welding platform, and a machine head arranged on the manipulator. The machine head is provided with a laser seat, an oxide film processing component is installed on the outer wall of the laser seat, a laser welding head is installed on the bottom of the laser seat, and a slide rail for installing the oxide film processing component is provided on the laser seat. The oxide film processing component includes a slide seat slidably assembled on the slide rail and a laser cleaning head installed on the slide seat. The laser cleaning head deviates from the radial orientation of the laser welding head. Before the laser welding head is welded, the laser cleaning head pre-instantly vaporizes the coating on the surface of the steel structure. Since the oxide layer is an important factor in the formation of pores or bubbles in the weld, it is cleaned before welding to improve the welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and in particular to a steel structure laser welding assembly device and a laser welding process. Background Art

[0002] Laser welding assembly refers to a welding process that uses the laser beam emitted by laser welding equipment to weld workpieces together. The laser welding equipment consists of a robotic arm, a machine head, a laser head and a servo control system. When welding, either wire welding or laser beam heating welding is used. The former is more expensive and has a higher weld strength, while the latter is less expensive and has a neat weld surface. Both welding processes require the formation of a molten pool in the welding area and are prone to bubbles in the welding area.

[0003] Laser welding, as a high-precision, high-efficiency welding technology, is widely used in automotive manufacturing, steel structure splicing, and other fields. However, practical application still presents a problem. For example, when welding two steel components (such as I-beams and channels), the long weld bead and the presence of coatings such as oxide films in the weld area can lead to numerous pores in the weld, affecting weld quality. Summary of the Invention

[0004] In order to solve the above problems and improve the quality of welds, the present invention provides the following technical solutions:

[0005] A steel structure laser welding assembly device includes a welding platform, a manipulator located above the welding platform and a machine head arranged on the manipulator, a laser base is provided on the machine head, an oxide film processing component is installed on the outer wall of the laser base, a laser welding head is installed on the bottom of the laser base, a slide rail for installing the oxide film processing component is provided on the laser base, the oxide film processing component includes a slide seat slidably assembled on the slide rail and a laser cleaning head installed on the slide seat, the laser cleaning head deviates from the radial orientation of the laser welding head, and the slide seat carries the laser cleaning head along the slide rail structure to move up and down relative to the welding platform, a multi-spectral detection component is installed on the laser base, and the oxide film signal on the workpiece is detected by the multi-spectral detection component to control the lifting and lowering movement of the oxide film processing component relative to the laser welding head.

[0006] As a further preferred embodiment, a first turret is provided on the machine head, the laser base is installed on the first turret, the laser base and the oxide film processing assembly can rotate 360 ​​degrees horizontally following the machine head, and a second turret is provided in the middle position of the manipulator, and the machine head can also rotate 360 ​​degrees vertically through the second turret.

[0007] As a further preferred embodiment, a lifting seat is fixed on the other end of the manipulator away from the machine head, and the lifting seat is installed on the longitudinal slide of the steel structure laser welding assembly device. The lifting seat is raised and lowered along the slide rail to adjust the distance between the laser welding head and the laser cleaning head and the welding platform.

[0008] As a further preferred embodiment, the multispectral detection component includes a multispectral camera and a light source arranged on a laser base, the multispectral camera is connected to a PLC controller, the multispectral camera and the light source are located between the laser cleaning head and the laser welding head, the light source is perpendicular to the welding platform, the slide rail structure is vertically arranged on the outer wall of the laser base, the top of the slide rail is vertically upward and connected to the outer wall of the laser base, the bottom end of the slide rail is vertically downward and exceeds the bottom end of the laser base, the slide slides on the slide rail, the laser cleaning head is fixed on the slide and the bottom end is close to the bottom end of the slide rail, the oxide film processing component also includes a push plate connected to the top end of the slide, and also includes an action rod connected to the cylinder on the top end of the push plate, the other end of the cylinder is fixed on the first turret, and the cylinder and the laser cleaning head are controlled by the PLC controller.

[0009] As a further preferred embodiment, the slide rail is provided with a sleeve cavity from the bottom end upward, and the oxide film treatment component also includes a telescopic seat nested in the sleeve cavity, the bottom end of the telescopic seat is provided with a nozzle exposed at the bottom end of the slide rail, the bottom end of the telescopic seat is provided with a protrusion, a tension spring is connected between the inner end of the telescopic seat and the top end of the sleeve cavity, a top seat is fixed on the outer wall of the slide seat, a push rod is connected to the protrusion, the push rod is bent upward and close to the top seat, an air intake pipe is installed on the slide rail, the inner end of the air intake pipe enters the sleeve cavity and is connected to the nozzle.

[0010] As a further preference, the outer end of the air inlet pipe is connected to an air source, the other end of the air source is connected to an air pump, and a button is fixed on the bottom surface of the raised portion, and the button is electrically connected to the air pump.

[0011] As a further preference, there are a plurality of nozzles, which are arranged at equal intervals, and the nozzle directions of the nozzles tend to be towards the laser cleaning head.

[0012] The present invention also provides a welding process using a steel structure laser welding assembly device, comprising the following steps:

[0013] Step 01: Clean the surface of the steel structure, especially remove oil stains from the welding area;

[0014] Step 02: Clamp the two steel structures to be welded together on the welding platform 1 using a clamp, ensuring that the butt gap between the two steel structures is less than or equal to 0.1 mm;

[0015] Step 03: The multispectral detection component detects the weld surface of the steel structure and controls the oxide film treatment component 5 to thoroughly clean the oxide film on the surface of the steel structure along the weld bead to ensure the weld bead is clean. The laser welding head 6 then completes the welding process to reduce pores and improve weld quality.

[0016] Step 04: Open the clamp and remove the welded steel structure from the welding platform 1.

[0017] The beneficial effects of the present invention compared to the prior art are:

[0018] It is equipped with spectrum detection function and oxide film treatment function. When in use, first clamp the two steel structures on the welding platform through the clamp. Before laser welding, the light source emits light to the surface of the two steel structures. The light is reflected by the surface of the steel structure to the multi-spectral camera. The multi-spectral camera feeds the signal back to the spectrum instrument. When the spectrum instrument analyzes that there is a coating on the surface of the steel structure, it sends the signal to the PLC controller. The PLC controller instructs the servo motor to drive the first turret to rotate, and the first turret drives the laser base to rotate. The laser base adjusts the oxide film treatment component to the movement direction of the weld. At this time, the laser cleaning head It is located in front of the laser welding head when welding, that is, the laser welding head follows behind the laser cleaning head. At the same time, the PLC controller instructs the cylinder, which pushes the push plate down, which pushes the slide, and which pushes the laser cleaning head down. The laser cleaning head is powered on earlier than the laser welding head, and emits a light beam toward the surface of the steel structure along the direction of the weld. The light beam heats the surface of the steel structure, causing the coating to fall off or move away from the weld. As the laser cleaning head moves along the direction of the weld, the laser welding head follows closely behind, and cooperates with the welding wire fed by the welding machine conveyor wheel to connect the welds, completing the welding and assembly of the two steel structures. Before the laser welding head welds, the laser cleaning head instantly vaporizes the coating on the surface of the steel structure in advance. Since the oxide layer is an important factor in the formation of pores or bubbles in the weld, it is cleaned before welding and avoided during welding, thereby improving the quality of the weld and the welding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a steel structure laser welding assembly device provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a steel structure laser welding assembly device provided by an embodiment of the present invention from another perspective, in which G represents a steel component;

[0021] Figure 3 A schematic diagram of a partial upward perspective of a steel structure laser welding assembly device provided by an embodiment of the present invention;

[0022] Figure 4A schematic diagram of a steel structure laser welding assembly device provided by an embodiment of the present invention after the slide rail and the telescopic seat are disassembled from another perspective;

[0023] Figure 5 A steel structure laser welding assembly device provided by the embodiment of the present invention comprises Figure 4 The enlarged schematic diagram of the C part is drawn out;

[0024] Figure 6 A partial rear view plan view of a steel structure laser welding assembly device provided by an embodiment of the present invention;

[0025] Figure 7 A steel structure laser welding assembly device provided by the embodiment of the present invention comprises Figure 5 The enlarged schematic diagram of part A is shown;

[0026] Figure 8 A partial side plan view of a steel structure laser welding assembly device provided by an embodiment of the present invention;

[0027] Figure 9 A steel structure laser welding assembly device provided by the embodiment of the present invention comprises Figure 7 Enlarged schematic diagram of part B.

[0028] In the figure: 1. Welding platform; 2. Manipulator; 21. Second turret; 3. Machine head; 31. First turret; 4. Laser base; 5. Oxide film treatment assembly; 6. Laser welding head; 7. Slide; 71. Top base; 8. Laser cleaning head; 9. Multispectral camera; 10. Light source; 11. Slide rail; 111. Cavity; 112. Telescopic base; 113. Nozzle; 114. Raised portion; 115. Tension spring; 116. Ejector rod; 117. Inlet pipe; 12. Button; 13. Lifting base; 14. Push plate; 15. Cylinder. DETAILED DESCRIPTION

[0029] The above and other embodiments and advantages of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments.

[0030] In one embodiment, Figures 1-9 As shown:

[0031] This embodiment provides a steel structure laser welding assembly device, including a welding platform 1, a manipulator 2 located above the welding platform 1 and a machine head 3 arranged on the manipulator 2, a laser base 4 is provided on the machine head 3, an oxide film processing component 5 is installed on the outer wall of the laser base 4, a laser welding head 6 is installed on the bottom of the laser base 4, a slide rail 11 for installing the oxide film processing component 5 is provided on the laser base 4, the oxide film processing component 5 includes a slide 7 slidably assembled on the slide rail 11 and a laser cleaning head 8 installed on the slide 7, the laser cleaning head 8 deviates from the radial orientation of the laser welding head 6, the slide 7 carries the laser cleaning head 8 and can move up and down relative to the welding platform 1 along the slide rail structure, a multi-spectral detection component is installed on the laser base 4, and the oxide film signal on the workpiece is detected by the multi-spectral detection component to control the lifting and lowering movement of the oxide film processing component 5 relative to the laser welding head 6.

[0032] As a further preference, a first turret 31 is provided on the machine head 3, and the laser base 4 is installed on the first turret 31. The laser base 4 and the oxide film processing assembly 5 can rotate 360 ​​degrees horizontally following the machine head 3. A second turret 21 is provided in the middle position of the manipulator 2, and the machine head 3 can also rotate 360 ​​degrees vertically through the second turret 21.

[0033] As a further preference, a lifting seat 13 is fixed on the other end of the manipulator 2 away from the machine head 3, and the lifting seat 13 is installed on the longitudinal slide of the steel structure laser welding assembly device. The lifting seat 13 is raised and lowered along the slide rail to adjust the distance between the laser welding head 6 and the laser cleaning head 8 and the welding platform 1.

[0034] As a further preferred embodiment, the multispectral detection component includes a multispectral camera 9 and a light source 10 arranged on the laser base 4, the multispectral camera 9 is connected to the PLC controller, the multispectral camera 9 and the light source 10 are located between the laser cleaning head 8 and the laser welding head 6, the light source 10 is perpendicular to the welding platform 1, the slide rail structure is vertically arranged on the outer wall of the laser base 4, the top of the slide rail 11 is vertically upward and connected to the outer wall of the laser base 4, the bottom end of the slide rail 11 is vertically downward and exceeds the bottom end of the laser base 4, the slide 7 slides on the slide rail 11, the laser cleaning head 8 is fixed on the slide 7 and the bottom end is close to the bottom end of the slide rail 11, the oxide film processing component 5 also includes a push plate 14 connected to the top of the slide 7, and also includes a cylinder 15 with an action rod connected to the top of the push plate 14, the other end of the cylinder 15 is fixed on the first turret 31, and the cylinder 15 and the laser cleaning head 8 are controlled by the PLC controller.

[0035] As a further preference, the slide rail 11 is provided with a sleeve cavity 111 from the bottom end upward, and the oxide film treatment component 5 also includes a telescopic seat 112 nested in the sleeve cavity 111, and the bottom end of the telescopic seat 112 is provided with a nozzle 113 exposed at the bottom end of the slide rail 11, and the bottom end of the telescopic seat 112 is provided with a protrusion 114, and a tension spring 115 is connected between the inner end of the telescopic seat 112 and the top of the sleeve cavity 111, a top seat 71 is fixed on the outer wall of the slide seat 7, and a push rod 116 is connected to the protrusion 114, and the push rod 116 is bent upward and close to the top seat 71, and an air intake pipe 117 is installed on the slide rail 11, and the inner end of the air intake pipe 117 enters the sleeve cavity 111 and is connected to the nozzle 113.

[0036] As a further preferred embodiment, the outer end of the air inlet pipe 117 is connected to the air source, the other end of the air source is connected to the air pump, and a button 12 is fixed on the bottom surface of the raised portion 114, and the button 12 is electrically connected to the air pump.

[0037] As a further preference, there are multiple nozzles 113 , which are arranged at equal intervals, and the nozzle directions of the nozzles 113 tend to be towards the laser cleaning head 8 .

[0038] Working principle and effect: First, the two steel structures are clamped on the welding platform 1 through a clamp, and the manipulator 2 brings the machine head 3 to the top of the two steel structures, and the machine head 3 brings the laser base 4 and the laser base 4 brings the laser welding head 6 to the top of the two steel structures (weld). According to the existing control technology of the laser welding equipment, the laser welding head 6 locates the welding origin at the joint of the two steel structures. Before welding, the light source 10 emits light to the surface of the two steel structures, and the light is reflected by the surface of the steel structure to the multispectral camera 9. The multispectral camera 9 feeds the signal back to the spectrometer. When the spectrometer analyzes that there is a coating (such as an oxide film) on the surface of the steel structure, the signal is sent to the PLC controller. The PLC controller instructs the servo motor to drive the first turret 31 to rotate, and the first turret 31 drives the laser base 4 to rotate. The laser base 4 adjusts the oxide film processing component 5 to the movement direction of the weld. At this time, the laser cleaning head 8 is located in front of the laser welding head 6 when welding, that is, the laser welding head 6 follows behind the laser cleaning head 8 (such as Figure 2As shown, the arrow in the figure indicates the welding direction), at the same time, the PLC controller instructs the cylinder 15, which pushes the push plate 14 downward, which pushes the slide 7, which pushes the laser cleaning head 8 downward. The laser cleaning head 8 is powered on earlier than the laser welding head 6, and emits a light beam toward the surface of the steel structure along the direction of the weld. The light beam heats the surface of the steel structure, causing the coating to fall off or move away from the weld. As the laser cleaning head 8 moves along the direction of the weld, the laser welding head 6 follows closely behind, and cooperates with the welding wire fed by the welding machine conveyor wheel to connect the welds, so that the two steel structures are welded and assembled. Before the laser welding head 6 welds, the laser cleaning head 8 instantly vaporizes the coating on the surface of the steel structure, especially the vaporization layer (film) that affects the generation of bubbles. Since the oxide layer is an important factor in the formation of pores or bubbles in the weld, it is cleaned before welding and avoided during welding, thereby improving the quality of the weld and the welding strength.

[0039] In addition, Figures 4 to 7 As shown, when the slide 7 pushes the laser cleaning head 8 to descend, the top seat 71 will also descend with the slide 7, and the top seat 71 will also descend with the button 12. The button 12 presses on the top rod 116 and pushes the top rod 116 to descend. The telescopic seat 112 is driven by the top rod 116 to descend along the sleeve 111 of the slide rail 11 and the tension spring 115 is stretched downward, and the telescopic seat 112 drives the nozzle 113 to descend. As the slide 7 continues to descend, the laser cleaning head 8 is pushed to the vicinity of the weld. At the same time, as the telescopic seat 112 descends, the nozzle 113 is also pushed to the vicinity of the weld. At this time, the button 12 will be pressed on the top rod 116 The end closes its normally closed contact, triggering the external air pump to automatically power on. The air pump provides cold air to the air inlet pipe 117 through the hose. The cold air enters all the nozzles 113 from the inner end of the air inlet pipe 117 and is sprayed on the surface of the steel structure through these nozzles 113. The nozzle 113 is followed by the laser cleaning head 8, and the laser welding head 6 is followed by the nozzle 113. After the laser cleaning head 8 vaporizes the oxide layer on the surface of the steel structure and close to the weld, the cold air sprayed by the nozzle 113 completely keeps the vaporized oxide layer away from the weld. The laser welding head 6 then welds the welding wire to the weld to form a weld, ensuring that there are no bubbles in the weld. Nozzle 113 is angled toward laser cleaning head 8. The peak temperature of laser cleaning head 8 is lower than that of laser welding head 6. The cold air ejected from nozzle 113 and the peak light from laser cleaning head 8 act on the steel structure, allowing laser cleaning head 8 to vaporize the oxide layer on the steel structure in advance while preventing the formation of a molten pool on the steel structure surface. Only when laser welding head 6 follows up can the welding wire be welded to the weld bead. The weld bead here refers to the gap between two steel structures after they are butted together, and also refers to the weld runway formed after welding.

[0040] Conversely, if the light source 10 emits light toward the surfaces of the two steel structures, the light is reflected by the steel structure surfaces onto the multispectral camera 9, which feeds a signal back to the spectrometer. When the spectrometer analyzes that the steel structure surfaces are free of coating (such as an oxide film), it sends a signal to the PLC controller. The PLC controller instructs the servo motor to drive the first turret 31 to rotate in the opposite direction, which in turn drives the laser base 4 to rotate in the opposite direction. The laser base 4 adjusts the oxide film treatment assembly 5 to the direction of the weld seam. At this time, the laser welding head 6 is in front and the laser cleaning head 8 is in the back. At the same time, the PLC controller instructs the cylinder 15 to drive the push plate 14 upward, which in turn drives the slide 7, which in turn drives the laser cleaning head 8 upward, and the laser cleaning head 8 is powered off. At this time, the slide 7 also drives the top base 71 upward, which in turn drives the button 12 upward. The button 12 eventually separates from the top of the push rod 116, and the normally open contact of the button 12 returns to normally open. The external air pump is powered off, and the air supply is complete. The laser welding head 6 is powered on in advance and completes the welding of the weld. The laser welding head 6 works alone at this time, and the laser cleaning head 8 rises to a position away from above the laser welding head 6 and stops working, saving energy consumption.

[0041] The present invention also provides a welding process using a steel structure laser welding assembly device, comprising the following steps:

[0042] Step 01: Clean the surface of the steel structure, especially the weld area, and remove oil stains. Use an alkaline degreaser at 60-80 degrees Celsius for 5-10 minutes. Use ultrasonic decontamination in the decontamination tank to assist in decontamination.

[0043] Step 02: Clamp the two steel structures to be welded together on the welding platform 1 using a fixture, ensuring that the butt gap between the two steel structures is less than or equal to 0.1 mm;

[0044] Step 03: The multispectral detection component inspects the weld surface of the steel structure and controls the oxide film treatment component 5 to thoroughly clean the oxide film on the surface of the steel structure along the weld bead to ensure the weld is clean. The laser welding head 6 then completes the welding process to reduce pores and improve weld quality.

[0045] Step 04: Open the clamp and remove the welded steel structure from the welding platform 1.

[0046] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described based on their actual installation and actual use, as well as the customary orientations of those skilled in the art. This is hereby explained.

[0047] It should be further explained that the multispectral detection principle mentioned in the present invention utilizes multispectral detection technology, which uses machine vision products based on cameras and a specific wavelength of visible light and infrared light to perform imaging. A multispectral camera is a camera that uses several bands to simultaneously image the same scene during operation. Therefore, it can obtain both the image information of the target and the spectral information of the target, identify oxidation areas, and the reflectivity of the oxide film and the substrate in different bands varies significantly. Its detection information and detection principle are existing technologies. The present invention only needs to assemble it onto the machine head and connect it to the PLC controller in the laser equipment before it can be used. It is existing technology and will not be described in detail in the present invention. The temperature control technology of the laser cleaning head being lower than the laser welding head is realized by the laser control principle. It is the technology of existing laser welding machines and will not be described in detail.

[0048] The specific embodiments described above further illustrate the purpose of the present invention, technical solutions, and beneficial effects. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In particular, it should be noted that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steel structure laser welding assembly device, comprising a welding platform (1), a manipulator (2) located above the welding platform (1), and a machine head (3) arranged on the manipulator (2), wherein a laser base (4) is provided on the machine head (3), characterized in that: An oxide film processing component (5) is installed on the outer wall of the laser base (4), a laser welding head (6) is installed on the bottom of the laser base (4), a slide rail (11) for installing the oxide film processing component (5) is provided on the laser base (4), the oxide film processing component (5) includes a slide seat (7) slidably assembled on the slide rail (11) and a laser cleaning head (8) installed on the slide seat (7), the laser cleaning head (8) deviates from the radial orientation of the laser welding head (6), the slide seat (7) carries the laser cleaning head (8) and can move up and down relative to the welding platform (1) along the slide rail structure, and a multi-spectral detection component is installed on the laser base (4), and the oxide film signal on the workpiece is detected by the multi-spectral detection component to control the oxide film processing component (5) to rise and fall relative to the laser welding head (6); The machine head (3) is provided with a first turret (31), the laser base (4) is mounted on the first turret (31), the laser base (4) and the oxide film processing assembly (5) can follow the machine head (3) to perform a 360-degree horizontal rotation, and a second turret (21) is provided at the middle position of the manipulator (2), and the machine head (3) can also perform a 360-degree vertical rotation via the second turret (21); A lifting seat (13) is fixed to the other end of the manipulator (2) away from the end on which the machine head (3) is installed. The lifting seat (13) is installed on a longitudinal slide of the steel structure laser welding assembly device. The lifting seat (13) is raised and lowered along the slide rail to adjust the distance between the laser welding head (6) and the laser cleaning head (8) and the welding platform (1); The slide rail (11) is provided with a sleeve cavity (111) extending upward from the bottom end, and the oxide film treatment component (5) also includes a telescopic seat (112) nested in the sleeve cavity (111), the bottom end of the telescopic seat (112) is provided with a nozzle (113) exposed at the bottom end of the slide rail (11), the bottom end of the telescopic seat (112) is provided with a protrusion (114), a tension spring (115) is connected between the inner end of the telescopic seat (112) and the top end of the sleeve cavity (111), a top seat (71) is fixed on the outer wall of the slide seat (7), a top rod (116) is connected to the protrusion (114), and the top rod (116) is bent upward and close to the top seat (71), an air inlet pipe (117) is installed on the slide rail (11), the inner end of the air inlet pipe (117) enters the sleeve cavity (111) and is connected to the nozzle (113).

2. A steel structure laser welding and assembling device according to claim 1, characterized in that: The multispectral detection assembly includes a multispectral camera (9) and a light source (10) arranged on a laser base (4), the multispectral camera (9) is connected to a PLC controller, the multispectral camera (9) and the light source (10) are located between a laser cleaning head (8) and a laser welding head (6), the light source (10) is perpendicular to the welding platform (1), and a slide rail structure is vertically arranged on the outer wall of the laser base (4), the top end of the slide rail (11) is vertically upward and connected to the outer wall of the laser base (4), and the bottom end of the slide rail (11) is vertically downward and exceeds The slide (7) slides on the slide rail (11) through the bottom end of the laser seat (4), and the laser cleaning head (8) is fixed on the slide (7) with its bottom end close to the bottom end of the slide rail (11). The oxide film processing component (5) also includes a push plate (14) connected to the top end of the slide (7), and also includes a cylinder (15) with an action rod connected to the top end of the push plate (14). The other end of the cylinder (15) is fixed on the first turret (31). The cylinder (15) and the laser cleaning head (8) are controlled by the PLC controller.

3. A steel structure laser welding and assembling device according to claim 2, characterized in that: The outer end of the air inlet pipe (117) is connected to an air source, and the other end of the air source is connected to an air pump. A button (12) is fixed on the bottom surface of the raised portion (114), and the button (12) is electrically connected to the air pump.

4. A steel structure laser welding and assembling device according to claim 3, characterized in that: There are a plurality of nozzles (113), which are arranged at equal distances, and the nozzles of the nozzles (113) are oriented toward the laser cleaning head (8).

5. A welding process using the steel structure laser welding and assembly device according to claim 1, characterized in that: The following steps are involved: Step 01: Clean the surface of the steel structure and remove oil stains from the welding area; Step 02: Clamp the two steel structures to be welded together on the welding platform (1) using a clamp, ensuring that the butt gap between the two steel structures is less than or equal to 0.1 mm; Step 03, the multi-spectral detection component detects the welding surface of the steel structure, and controls the oxide film treatment component (5) to thoroughly clean the oxide film on the surface of the steel structure along the weld to ensure that the weld is clean, and then uses the laser welding head (6) to complete the welding immediately thereafter, thereby reducing pores and improving the quality of the weld; Step 04: Open the clamp and remove the welded steel structure from the welding platform (1).

Images