Welding device for die-casting aluminum alloy precise structural part of new energy automobile

Abstract

The invention relates to the technical field of precision structural part welding, in particular to a new energy automobile die-casting aluminum alloy precision structural part welding device which comprises a laser welding head, and the welding device comprises a bearing platform arranged on the side wall of the laser welding head; according to the welding device, the welding position pre-cleaning, welding head protection and welding line cooling integrated welding device is designed, the multifunctional nozzle rotates to the front portion of the laser welding head before welding to convey high-pressure clean airflow, the welding head is arranged in the welding position, the welding head is arranged in the welding position, and the protective gas nozzles are arranged on the side wall of the laser welding head at equal intervals and used for conveying argon to the welding position. After welding, the multifunctional nozzle rotates to the rear portion of the laser welding head to convey low-temperature cooling gas, the gas curtain gas nozzle conveys inert gas during cleaning, a physical barrier is formed between the multifunctional nozzle and the laser welding head, pollutants are prevented from reversely splashing to a laser head lens, and the multiple protective gas nozzles stably convey argon to a molten pool in the whole welding process. And a continuous gas protection layer is formed.

Description

A welding device for precision die-cast aluminum alloy structural parts for new energy vehicles Technical Field

[0001] This invention relates to the field of precision structural component welding technology, specifically to a welding device for precision die-cast aluminum alloy structural components for new energy vehicles. Background Technology

[0002] With the rapid development of the new energy vehicle industry towards lightweight and high integration, the application of integrated die-cast aluminum alloy body structural components such as battery pack housings, front and rear longitudinal beams, and electric drive unit housings is becoming increasingly widespread. These die-cast parts are characterized by complex structures, thin walls, and precise dimensions. In their subsequent assembly, they often need to be connected by high-quality and efficient welding processes. Laser welding is considered one of the ideal processes for connecting precision aluminum alloy structural components due to its advantages such as high energy density, low heat input, small deformation, and high degree of automation.

[0003] The existing precision structural parts of die-cast aluminum alloy for new energy vehicles require cleaning of the weld seam during the welding process. The cleaning of the weld seam by wiping and blowing has the following obvious defects: 1. The wiping cleaning method is inefficient, and the blowing cleaning method lacks protective measures. Dust and airflow during cleaning can easily adhere to the optical components of the laser welding head.

[0004] 2. The problem that air blowing cleaning cannot be used in conjunction with the laser welding head to slowly cool the weld after welding. Summary of the Invention

[0005] This invention provides a welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles to solve the problems of low efficiency of traditional laser welding cleaning methods such as wiping and lack of protective measures for air blowing.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles is provided, including a laser welding head. The welding device includes: a support platform disposed on the side wall of the laser welding head; a multi-functional nozzle disposed at the bottom of the support platform and rotatable around its axis, the multi-functional nozzle having at least two working positions, the multi-functional nozzle rotating to the front of the welding torch for delivering high-pressure clean airflow to the weld area, and the multi-functional nozzle rotating to the rear of the welding torch for delivering low-temperature cooling airflow to the weld area; an air curtain nozzle disposed at the bottom of the support platform, the air curtain nozzle being located between the multi-functional nozzle and the laser welding head; and a plurality of equally spaced protective air nozzles disposed on the side wall of the laser welding head, the protective air nozzles being used to deliver argon gas to the welding area.

[0007] The beneficial effects of this invention are as follows: By designing a welding device that integrates weld pre-cleaning, weld head protection, and weld cooling, this invention enables the welding of precision die-cast aluminum alloy structural parts for new energy vehicles to be effectively cleaned by simultaneously tracking and aligning the weld joint with the laser welding head and delivering clean high-pressure airflow to the weld joint. This is achieved in conjunction with an air curtain nozzle delivering inert airflow, which forms a protective air curtain between the laser welding head and the multi-functional nozzle, preventing airflow or fine dust particles from adhering to the laser welding head. After welding, the multi-functional nozzle rotates to the rear of the laser welding head to deliver low-temperature cooling gas, effectively providing slow cooling protection to the weld joint. Multiple protective air nozzles stably deliver argon gas to the molten pool throughout the welding process, forming a continuous gas protective layer. This effectively avoids the problems of increased weld porosity and large welding deformation caused by impurities at the weld joint, slow heat dissipation at the weld joint, and backflow of contaminants onto the laser head lens during cleaning, which are common in the welding of precision die-cast aluminum alloy structural parts for new energy vehicles. Through the synergistic effect of the front and rear airflows, porosity is effectively reduced, weld tensile strength is increased, and welding deformation is effectively controlled.

[0008] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0009] Figure 1 is an overall structural view of the present invention; Figure 2 is a structural schematic diagram of the laser welding head, the support platform, and the multifunctional nozzle in one embodiment of the present invention; Figure 3 is a front view of the laser welding head and the support platform in one embodiment of the present invention; Figure 4 is a structural schematic diagram of the adjustment component in one embodiment of the present invention; Figure 5 is a structural schematic diagram of the adjustment component in one embodiment of the present invention; Figure 6 is a structural schematic diagram of the rotation component in one embodiment of the present invention; Figure 7 is a cross-sectional schematic diagram of the adsorption switching component in one embodiment of the present invention; Figure 8 is a structural schematic diagram of the processing box, the dust filter, and the annular groove in one embodiment of the present invention; Figure 9 is a structural schematic diagram of the air curtain nozzle and the heating module in one embodiment of the present invention; The list of components represented by each number in the figures is as follows: 1. Laser welding 1. Head; 2. Supporting platform; 3. Multifunctional nozzle; 4. Air curtain nozzle; 5. Protective nozzle; 6. High-pressure nozzle; 7. Negative pressure pipe; 8. Adsorption box; 9. Adsorption pipe; 10. Adsorption switching assembly; 101. Processing box; 102. Dust filter; 103. Ring groove; 104. Baffle; 105. Switching electric push rod; 11. Rotating plate; 12. Adjustment assembly; 121. Adjusting electric push rod; 122. Connecting seat; 13. Rotating assembly; 131. Driven wheel; 132. Servo motor; 133. Drive wheel; 134. Transmission belt; 14. Adjustment assembly; 141. Fixing pipe; 142. Bracket; 143. Adjusting pipe; 144. Adjusting rod; 145. Adjusting screw; 15. Heating module; 16. Connecting block. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0011] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0012] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0013] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0014] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0015] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0016] The present invention provides the following preferred embodiments: Embodiment 1 Referring to Figure 1, a welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles includes a laser welding head 1. The welding device includes: a support platform 2 disposed on the side wall of the laser welding head 1; a multi-functional nozzle 3 disposed at the bottom of the support platform 2 and rotatable around its axis, the multi-functional nozzle 3 having at least two working positions, the multi-functional nozzle 3 rotating to the front of the welding torch for delivering high-pressure clean airflow to the weld area, and the multi-functional nozzle 3 rotating to the rear of the welding torch for delivering low-temperature cooling airflow to the weld area; an air curtain nozzle 4 disposed at the bottom of the support platform 2, the air curtain nozzle 4 being located between the multi-functional nozzle 3 and the laser welding head 1; and a plurality of equally spaced protective nozzles 5 disposed on the side wall of the laser welding head 1, the protective nozzles 5 being used to deliver argon gas to the welding area.

[0017] By setting up a laser welding head 1, a multi-functional nozzle 3, an air curtain nozzle 4, and a protective gas nozzle 5, the traditionally independent cleaning, protection, and cooling functions are integrated onto the support platform 2 on the side of the laser welding head 1, achieving in-situ process and dynamic collaboration. The core lies in the multi-functional nozzle 3, which can rotate around its axis and switch positions and functions according to the welding sequence: the multi-functional nozzle 3 is connected to external high-pressure and low-temperature air supply equipment. Before welding, the multi-functional nozzle 3 rotates to the front of the laser welding head 1 to supply high-pressure clean air. After welding, the multi-functional nozzle 3 rotates to the rear of the laser welding head 1 to supply low-temperature cooling gas. The air curtain nozzle 4 supplies inert gas during cleaning, forming a physical barrier between the multi-functional nozzle 3 and the laser welding head 1 to prevent contaminants from splashing back onto the laser head lens. Multiple protective gas nozzles 5 stably supply argon gas to the molten pool throughout the welding process, forming a continuous gas protective layer.

[0018] When using the welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles, follow these steps: Rotate the multi-functional nozzle 3 around the axis to switch working positions: Before welding, rotate it to the front of the laser welding head 1 to spray high-pressure cleaning airflow to remove oxide film and impurities from the weld surface; after welding, rotate it to the rear of the laser welding head 1 to spray low-temperature cooling airflow to accelerate weld solidification and reduce the heat-affected zone.

[0019] Laser welding head 1 protection: The air curtain nozzle 4 is located between the multi-functional nozzle 3 and the laser head, and sprays inert gas to form an air curtain, which isolates the multi-functional nozzle 3 from the laser welding head 1 and prevents the laser welding head 1 from being contaminated.

[0020] Welding protection: Protective gas nozzles 5 are evenly distributed along the side wall of the laser head, and argon gas is sprayed synchronously to further suppress plasma generation and stabilize the molten pool shape.

[0021] In this embodiment, the three major functions of pre-welding cleaning, cleaning protection, and post-welding slow cooling are integrated into one workstation through the cooperation of laser welding head 1, multi-functional nozzle 3, air curtain nozzle 4, and protective air nozzle 5. This eliminates offline cleaning and transfer steps, significantly shortens the production cycle, and meets the high-efficiency production needs of new energy vehicle components. The rotation of multi-functional nozzle 3 enables precise switching between cleaning and cooling functions in time and space. High-pressure cleaning is highly targeted, and low-temperature slow cooling is well-controllable, fundamentally reducing defects such as porosity, spatter, and deformation caused by surface contamination and welding stress concentration. The inert gas curtain delivered by air curtain nozzle 4 actively isolates contaminants during the cleaning process, effectively protecting the laser optical components of laser welding head 1 and improving the long-term reliability and maintenance cycle of the equipment.

[0022] Referring to Figure 3, in Example 2, the multifunctional nozzle 3 is a Venturi composite nozzle. A high-pressure nozzle 6 is provided at the bottom of the multifunctional nozzle 3, a negative pressure pipe 7 is provided in the middle of the multifunctional nozzle 3, an adsorption box 8 is provided at the top of the negative pressure pipe 7, an adsorption pipe 9 is provided at the top of the adsorption box 8, the bottom of the adsorption pipe 9 is located on one side of the high-pressure nozzle 6, and an adsorption switching component 10 is provided inside the adsorption box 8.

[0023] By setting up a high-pressure nozzle 6, a negative pressure pipe 7, an adsorption box 8, an adsorption pipe 9, and an adsorption switching component 10, a Venturi composite nozzle is used as a multi-functional nozzle 3. The multi-functional nozzle 3 has a narrow opening in the middle, and the negative pressure pipe 7 is connected to the narrow opening of the multi-functional nozzle 3. The high-pressure nozzle 6 at the bottom is used to output cleaning or cooling airflow. The negative pressure pipe 7 in the middle, together with the top adsorption box 8 and adsorption pipe 9, forms a negative pressure suction channel. When the high-pressure nozzle 6 sprays out a high-speed airflow, according to the Venturi effect, a strong negative pressure will be generated at the opening of the adsorption pipe 9 through the action of the negative pressure pipe 7, the adsorption box 8, and the adsorption pipe 9. In cleaning mode, this negative pressure can suck away the dust and debris blown up by the high-pressure airflow, forming a synergistic effect of "blowing and sucking at the same time".

[0024] In this embodiment, through the cooperation of the high-pressure nozzle 6, negative pressure pipe 7, adsorption box 8, adsorption pipe 9 and adsorption switching component 10, the adsorption pipe 9 can adsorb dust and other impurities generated by blowing and rinsing and the fumes generated by the weld after welding through the Venturi effect when conveying high-pressure airflow for cleaning and low-temperature airflow for slow cooling, thus solving the problem that traditional pure air blowing cleaning is prone to causing secondary dust re-fall.

[0025] Referring to Figures 7 and 8, the adsorption switching assembly 10 of Embodiment 3 includes: a processing box 101 disposed inside the adsorption box 8, two sets of dust collection filters 102 disposed inside the processing box 101, an annular groove 103 disposed at the bottom of the processing box 101 and connected to the negative pressure pipe 7, a partition 104 disposed in the middle of the processing box 101, and a switching electric push rod 105 disposed on the side wall of the adsorption box 8 and connected to the processing box 101.

[0026] By setting up a processing box 101, a dust collection filter 102, an annular groove 103, a partition 104, and a switching electric push rod 105, the two sets of dust collection filters 102 in the processing box 101 can work alternately or one can be used while the other is on standby. When the resistance of one set of filters increases due to the adsorption of pollutants, the switching electric push rod 105 drives the processing box 101 to move, switching the airflow channel to another set of clean filters, ensuring the continuous and stable negative pressure suction. The partition 104 is used to separate the airflow, and the annular groove 103 ensures that the connection with the negative pressure pipe 7 can be maintained in different switching positions.

[0027] In this embodiment, the online switching and uninterrupted operation of the filtration system are achieved through the cooperation of the processing box 101, the dust filter 102, the ring groove 103, the partition 104 and the switching electric push rod 105. This avoids the problem of having to stop for maintenance due to filter clogging. Through automatic switching, a high-efficiency negative pressure suction is always maintained, thereby ensuring a high-efficiency cleaning effect.

[0028] Referring to Figure 6, in Embodiment 4, the support platform 2 is fixedly connected to the laser welding head 1. A rotating plate 11 is rotatably provided at the bottom of the support platform 2. A multi-functional nozzle 3 is provided on one side of the rotating plate 11. An adjustment component 12 for adjusting the angle of the multi-functional nozzle 3 is provided at the bottom of the rotating plate 11. A rotating component 13 is provided between the support platform 2 and the rotating plate 11.

[0029] By setting up a rotating plate 11, an adjusting component 12, and a rotating component 13, the angle of the multi-functional nozzle 3 can be adjusted by the adjusting component 12 to adapt to different shapes of precision components, and the 180-degree rotation of the drive component 13 can be achieved.

[0030] In this embodiment, the angle of the multi-functional nozzle 3 and the working position are adjusted by the cooperation of the rotating plate 11, the adjusting component 12 and the rotating component 13.

[0031] Referring to Figure 4, in Embodiment 5, the adjustment assembly 12 includes: an adjustment electric push rod 121 disposed at the bottom of the rotating plate 11, the adjustment electric push rod 121 being hinged to the rotating plate 11, and a connecting seat 122 disposed at the output end of the adjustment electric push rod 121, the connecting seat 122 being hinged to the multi-functional nozzle 3.

[0032] By setting up an adjustable electric push rod 121 and a connecting seat 122, the angle of the multi-functional nozzle 3 can be adjusted by adjusting the drive of the electric push rod 121 during use, so that the multi-functional nozzle 3 can adapt to different shapes of precision components.

[0033] In this embodiment, by adjusting the cooperation between the electric push rod 121 and the connecting seat 122, the effect of flexible adjustment of the angle of the multi-functional nozzle 3 is achieved.

[0034] Referring to Figure 6, in Embodiment Six, the rotating assembly 13 includes: a driven wheel 131 disposed at the bottom of the support platform 2, the driven wheel 131 being connected to the bearing of the support platform 2, a rotating plate 11 being fixedly connected to the bottom of the driven wheel 131, a servo motor 132 disposed on one side of the support platform 2, a driving wheel 133 being fixedly connected to the output end of the servo motor 132, and a transmission belt 134 being disposed between the driving wheel 133 and the driven wheel 131.

[0035] By setting up a driven wheel 131, a servo motor 132, a driving wheel 133, and a transmission belt 134, and by connecting the power supply through the servo motor 132, the driving wheel 133 drives the driven wheel 131 to rotate through the transmission belt 134, thereby achieving a 180-degree rotation of the rotating plate 11 and adjusting the working position of the multi-functional nozzle 3.

[0036] In this embodiment, the rotation drive of the multi-functional nozzle 3 station is achieved through the cooperation of the driven wheel 131, the servo motor 132, the driving wheel 133 and the transmission belt 134.

[0037] As shown in Figure 2, in Embodiment 7, an adjustment assembly 14 is provided between the four protective gas nozzles 5 and the laser welding head 1. The adjustment assembly 14 is used to adjust the angle of the protective gas nozzles 5.

[0038] By setting the adjustment component 14, the angle of the protective gas nozzle 5 is adjusted so that the protective gas nozzle 5 is adapted to the laser welding head 1.

[0039] In this embodiment, the adjustment component 14 is used to achieve the effect of synchronous and flexible adjustment of the angles of multiple protective air nozzles 5.

[0040] Referring to Figure 4, in Embodiment 8, the adjustment assembly 14 includes: a fixed tube 141 disposed at the bottom of the laser welding head 1; four brackets 142 hinged to the protective gas nozzle 5 on the side wall of the fixed tube 141; an adjustment tube 143 movably disposed at the top of the fixed tube 141; four adjustment rods 144 hinged to the side wall of the adjustment tube 143; the other end of the adjustment rods 144 hinged to the protective gas nozzle 5; and two adjustment screws 145 threadedly connected to the top of the fixed tube 141, with the bottom of the adjustment screws 145 rotatably connected to the adjustment tube 143.

[0041] By setting up a fixed tube 141, a bracket 142, an adjusting tube 143, an adjusting rod 144, and adjusting screws 145, the adjusting tube 143 can move on the fixed tube 141 by rotating the two adjusting screws 145. The up and down movement of the adjusting tube 143 on the fixed tube 141 is converted into the swing of the protective air nozzle 5 around its hinge point with the bracket 142 by the hinged adjusting rod 144, thereby changing the tilt angle of all the protective air nozzles 5 and adjusting the airflow convergence point.

[0042] In this embodiment, the angles of all protective gas nozzles 5 are adjusted synchronously through the cooperation of the fixed tube 141, bracket 142, adjusting tube 143, adjusting rod 144 and adjusting screw 145, so that the argon gas protective cover can be precisely concentrated above the weld pool according to the width and depth of the weld pool, forming the most effective inert gas protective layer and maximizing the suppression of oxidation.

[0043] Referring to Figure 9, in Embodiment 9, the air curtain nozzle 4 is arc-shaped, and a heating module 15 is provided inside the air curtain nozzle 4. The heating module 15 is used to heat the airflow delivered by the air curtain nozzle 4.

[0044] By setting the air curtain nozzle 4 to be arc-shaped and the heating module 15, the air curtain nozzle 4 is designed to be arc-shaped, so that the airflow barrier it sprays fits more closely to the contour of the front end of the laser head, forming a more uniform and complete protective surface. The internal heating module 15 can appropriately heat the air curtain gas.

[0045] In this embodiment, the arc-shaped air curtain nozzle 4 and the heating module 15 are designed to make the air curtain coverage more comprehensive. Especially when cleaning complex surfaces, it can more effectively block contaminants that bounce off from the side. The heating module 15 enables the air curtain nozzle 4 to deliver heated airflow, thereby preheating the welding area to a certain extent.

[0046] As shown in Figure 6, in Example 10, a connecting block 16 is provided between the bottom of the multifunctional nozzle 3 and the adsorption tube 9.

[0047] By setting the connecting block 16, the multifunctional nozzle 3 and the adsorption tube 9 are connected, so that the angle of the adsorption tube 9 can be adjusted according to the angle of the multifunctional nozzle 3. The adsorption tube 9 is made of a completely reusable material.

[0048] In this embodiment, the adsorption tube 9 and the multifunctional nozzle 3 are stably connected by the connecting block 16, so that the adsorption tube 9 can be adjusted according to the angle adjustment of the multifunctional nozzle 3.

[0049] It should be noted that this invention is a welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles. In use, the multi-functional nozzle 3 is first connected to an external high-pressure airflow and low-temperature airflow delivery device. Before welding, when the laser joint is aligned with the weld seam, the multi-functional nozzle 3 rotates to the front of the laser welding head 1 to deliver high-pressure clean airflow. When the high-pressure nozzle 6 sprays out high-speed airflow, according to the Venturi effect, a strong negative pressure will be generated at the mouth of the adsorption tube 9 through the action of the negative pressure tube 7, the adsorption box 8, and the adsorption tube 9. In cleaning mode, this negative pressure can suck away the dust and debris blown by the high-pressure airflow, forming a synergistic effect of "blowing and sucking at the same time". The air curtain nozzle 4 delivers inert gas during cleaning, forming a physical barrier between the multi-functional nozzle 3 and the laser welding head 1 to prevent contaminants from splashing back to the laser head lens. Multiple protective nozzles 5 stably deliver argon gas to the molten pool throughout the welding process, forming a continuous gas protective layer. After welding, the multi-functional nozzle 3 rotates to the rear of the laser welding head 1 to deliver low-temperature cooling gas.

[0050] The beneficial effects of the present invention are specifically reflected in the fact that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles, comprising a laser welding head (1), characterized in that, The welding device includes: a support platform (2) disposed on the side wall of the laser welding head (1); a multi-functional nozzle (3) disposed at the bottom of the support platform (2) and rotatable around its axis, the multi-functional nozzle (3) having at least two working positions, the multi-functional nozzle (3) rotating to the front of the welding torch for delivering high-pressure clean airflow to the weld area, the multi-functional nozzle (3) rotating to the rear of the welding torch for delivering low-temperature cooling airflow to the weld area; an air curtain nozzle (4) disposed at the bottom of the support platform (2), the air curtain nozzle (4) being located between the multi-functional nozzle (3) and the laser welding head (1); and a plurality of equally spaced protective nozzles (5) disposed on the side wall of the laser welding head (1), the protective nozzles (5) being used to deliver argon gas to the welding area.

2. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 1, characterized in that, The multifunctional nozzle (3) is a Venturi composite nozzle. A high-pressure nozzle (6) is provided at the bottom of the multifunctional nozzle (3). A negative pressure pipe (7) is provided in the middle of the multifunctional nozzle (3). An adsorption box (8) is provided at the top of the negative pressure pipe (7). An adsorption pipe (9) is provided at the top of the adsorption box (8). The bottom of the adsorption pipe (9) is located on one side of the high-pressure nozzle (6). An adsorption switching component (10) is provided inside the adsorption box (8).

3. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 2, characterized in that, The adsorption switching assembly (10) includes: a processing box (101) disposed inside the adsorption box (8), two sets of dust collection filters (102) disposed inside the processing box (101), an annular groove (103) connected to the negative pressure pipe (7) disposed at the bottom of the processing box (101), a partition (104) disposed in the middle of the processing box (101), and a switching electric push rod (105) connected to the processing box (101) disposed on the side wall of the adsorption box (8).

4. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 1, characterized in that, The support platform (2) is fixedly connected to the laser welding head (1). A rotating plate (11) is rotatably provided at the bottom of the support platform (2). The multi-functional nozzle (3) is provided on one side of the rotating plate (11). An adjustment component (12) for adjusting the angle of the multi-functional nozzle (3) is provided at the bottom of the rotating plate (11). A rotating component (13) is provided between the support platform (2) and the rotating plate (11).

5. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 4, characterized in that, The adjustment assembly (12) includes: an adjustment electric push rod (121) disposed at the bottom of the rotating plate (11), the adjustment electric push rod (121) being hinged to the rotating plate (11), and a connecting seat (122) being disposed at the output end of the adjustment electric push rod (121), the connecting seat (122) being hinged to the multi-functional nozzle (3).

6. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 4, characterized in that, The rotating assembly (13) includes: a driven wheel (131) disposed at the bottom of the bearing platform (2), the driven wheel (131) being connected to the bearing platform (2) bearing, the rotating plate (11) being fixedly connected to the bottom of the driven wheel (131), a servo motor (132) being disposed on one side of the bearing platform (2), a driving wheel (133) being fixedly connected to the output end of the servo motor (132), and a transmission belt (134) being disposed between the driving wheel (133) and the driven wheel (131).

7. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 1, characterized in that, An adjustment assembly (14) is provided between the four protective gas nozzles (5) and the laser welding head (1), the adjustment assembly (14) being used to adjust the angle of the protective gas nozzles (5).

8. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 7, characterized in that, The adjustment assembly (14) includes: a fixed tube (141) disposed at the bottom of the laser welding head (1), four brackets (142) hinged to the protective air nozzle (5) on the side wall of the fixed tube (141), an adjustment tube (143) movably disposed at the top of the fixed tube (141), four adjustment rods (144) hinged to the side wall of the adjustment tube (143), the other end of the adjustment rods (144) being hinged to the protective air nozzle (5), and two adjustment screws (145) threadedly connected to the top of the fixed tube (141), the bottom of the adjustment screws (145) being rotatably connected to the adjustment tube (143).

9. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 1, characterized in that, The air curtain nozzle (4) is arc-shaped, and a heating module (15) is provided inside the air curtain nozzle (4). The heating module (15) is used to heat the airflow delivered by the air curtain nozzle (4).

10. The welding device for precision structural parts of die-cast aluminum alloy for new energy vehicles according to claim 1, characterized in that, A connecting block (16) is provided between the bottom of the multifunctional nozzle (3) and the adsorption tube (9).

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