Welding device

Abstract

The utility model discloses a welding device, a placing part of a main body is used for placing a to-be-welded part, at least two side-by-side guide wheels can rotate relative to the main body, one side of each guide wheel is opposite to the placing part, and a welding head can be used for welding the to-be-welded part from a gap between the two side-by-side guide wheels. A support, connected with the main body, in the blowing assembly supports an air nozzle, and the air nozzle is in threaded connection with the support, extends into the position between every two adjacent guide wheels and is adjacent to the welding head. The gas nozzle is provided with a polygonal peripheral wall, and a dismounting end of a dismounting part in the welding device is provided with a dismounting groove which is used for sleeving the gas nozzle and is matched with the peripheral wall. When the air tap is blocked and needs to be replaced, the dismounting and mounting end can stretch into the space between the two adjacent guide wheels, the dismounting and mounting groove of the dismounting and mounting end is sleeved with the air tap through the dismounting and mounting groove, the dismounting and mounting groove is matched with the polygonal peripheral wall of the air tap, the air tap can be dismounted from the support, dismounting is fast, mounting is similar, the dismounting and mounting process is fast, and the overhauling and welding efficiency of the welding device can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of welding equipment, and in particular, relates to a welding device. Background Art

[0002] During the production process of plate and strip laser welding, due to the special laser welding process, a certain amount of inert gas needs to be introduced into the weld area of ​​the workpiece to be welded. The protective gas represented by helium is blown into the weld area of ​​the workpiece to be welded through a gas nozzle with a specific angle, which is beneficial to improve the strength and quality of the weld.

[0003] At present, inert gas can be blown into the weld area through a gas nozzle. Since the gas nozzle needs to be close to the laser action area when blowing inert gas, it is easy for the gas nozzle to be melted and blocked by the splashing welding slag, resulting in the problem that the gas cannot be ejected normally, affecting the welding quality. Therefore, the gas nozzle needs to be replaced regularly. However, for equipment such as welding machines with limited space, it is inconvenient to replace the gas nozzle. It is usually necessary to remove the bracket and other structures connected to the gas nozzle together, and reinstalling the gas nozzle also requires re-adjusting the gas nozzle angle. The processing time is long, causing the production line to stop, affecting the maintenance of the welding machine and welding efficiency. Utility Model Content

[0004] The present application aims to solve the technical problem that the welding machine maintenance and welding efficiency are affected to a certain extent. To this end, the present application provides a welding device.

[0005] A welding device provided in an embodiment of the present application includes:

[0006] The main body is provided with a placement portion for placing the workpiece to be welded;

[0007] At least two adjacent guide wheels are rotatably disposed on the main body and one side of each of the guide wheels is opposite to the placement portion;

[0008] A welding head, connected to the main body and located between two adjacent guide wheels, for welding the workpiece to be welded;

[0009] A blowing assembly, comprising a bracket connected to the main body, and a gas nozzle threadedly connected to the bracket, the gas nozzle extending between two adjacent guide wheels and adjacent to the welding head, the gas nozzle having a polygonal peripheral wall;

[0010] The disassembly and assembly part is provided with a disassembly and assembly end for extending into between two adjacent guide wheels, and the disassembly and assembly end is provided with a disassembly and assembly groove for sleeve-mounting the air nozzle and matching with the peripheral wall.

[0011] In some embodiments, the disassembly component includes a columnar disassembly portion and a control portion, one end of the disassembly portion is configured as the disassembly end, and an axial angle exists between the disassembly portion and the control portion.

[0012] In some embodiments, one end of the control portion is connected to the other end of the disassembly portion.

[0013] In some embodiments, the peripheral wall of the disassembly and assembly portion is provided with knurling, and the control portion is a hexagonal prism.

[0014] In some embodiments, the disassembly end is columnar, the opening of the disassembly slot extends along the axial direction of the disassembly end, and the peripheral wall of the disassembly end contacts the two guide wheels.

[0015] In some embodiments, the end surfaces of two adjacent guide wheels are opposite to each other, and the air nozzle extends into the two guide wheels in a direction forming an angle with the axial direction of the guide wheels.

[0016] In some embodiments, the air nozzle includes a connecting part, a limiting part and a matching part, which are all cylindrical and coaxially connected in sequence. The connecting part is threadedly connected to the bracket, the maximum diameter of the limiting part is greater than or equal to the maximum diameter of the matching part, and the surrounding wall of the matching part is configured as a polygon.

[0017] In some embodiments, the support comprises:

[0018] The supporting part is provided with a through hole penetrating the supporting part;

[0019] The tubular portion has one end connected to the support portion and communicated with the through hole, and the other end of the tubular portion is threadedly connected to the air nozzle.

[0020] In some embodiments, the tubular portion includes at least two tube segments that are rotatably connected and capable of damping rotation with respect to each other.

[0021] In some embodiments, the main body includes a lifting portion that can be raised and lowered relative to the placement portion, and the guide wheel and the welding head are both disposed on the lifting portion.

[0022] Advantageous effects provided by one or more embodiments of the present application:

[0023] In the welding device, the placement part of the main body can be used to place the workpiece to be welded. At least two guide wheels arranged side by side can rotate relative to the main body, and one side of each wheel is opposite to the placement part. The guide wheels cooperate with the placement part to support and guide the workpiece to be welded, thereby realizing stable welding of the workpiece to be welded. The welding head between the two guide wheels and connected to the main body can weld the workpiece to be welded from the gap between the two guide wheels arranged side by side, thereby realizing welding of the workpiece to be welded while having a relatively compact structure. The bracket connected to the main body in the blowing assembly provides support for the gas nozzle. The gas nozzle is threadedly connected to the bracket and extends between two adjacent guide wheels and is adjacent to the welding head. During the welding process, inert gas can be blown into the welding area of ​​the workpiece to be welded, thereby improving the quality of the weld. The gas nozzle has a polygonal peripheral wall, and the disassembly end of the disassembly part in the welding device is provided with a disassembly groove for sleeve-mounting the gas nozzle and matching the peripheral wall. When the air nozzle is blocked and needs to be replaced, the disassembly end can be extended between two adjacent guide wheels, and the disassembly groove can be set on the air nozzle. The disassembly groove matches the polygonal peripheral wall of the air nozzle. Then, rotating the disassembly part can make the disassembly end rotate, and the rotation is transmitted to the air nozzle. The air nozzle rotates relative to the bracket, so that the threaded air nozzle and the bracket can be separated, and the air nozzle located in the disassembly groove can be pulled out from between the two guide wheels together with the disassembly part. The disassembly is quick, and the position of the bracket has not changed. There is no need to adjust the position of the air nozzle and the bracket. When installing the air nozzle, the disassembly part is also used to complete the installation of the air nozzle. The disassembly process is quick, which can improve the maintenance and welding efficiency of the welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic structural diagram of a welding device in some embodiments or certain embodiments is shown.

[0026] Figure 2 A schematic diagram of the use status of a welding device in some embodiments or certain embodiments is shown.

[0027] Figure 3 A schematic diagram of the maintenance process of a welding device in some embodiments or certain embodiments is shown.

[0028] Figure 4 A schematic structural diagram of a disassembly and assembly part in some embodiments or certain embodiments is shown.

[0029] Figure 5 A schematic structural diagram of a gas nozzle in some embodiments or certain embodiments is shown.

[0030] Figure numerals: 1. main body; 11. placement part; 12. lifting part; 2. guide wheel; 3. welding head; 4. blowing assembly; 41. bracket; 411. supporting part; 412. tubular part; 4121. pipe section; 42. air nozzle; 421. connecting part; 422. limiting part; 423. matching part; 5. disassembly part; 51. disassembly end; 511. disassembly groove; 52. disassembly part; 521. knurling; 53. force-bearing part; 6. gas supply carrier; 100. workpiece to be welded. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] In the related art, when the gas nozzle of some welding machines is blocked, it takes a long time to replace it and the maintenance efficiency is low. The embodiment of the present application provides a welding device, which can at least solve the above technical problems to a certain extent.

[0036] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0037] Figure 1 A schematic diagram of the structure of a welding device in some embodiments or certain embodiments is shown. Figure 2 A schematic diagram of a welding device in use in some embodiments or certain embodiments is shown. A welding device provided in an embodiment of the present application includes:

[0038] The main body 1 is provided with a placement portion 11 for placing a workpiece 100 to be welded.

[0039] At least two adjacent guide wheels 2 are rotatably disposed on the main body 1 and one side of each of the guide wheels is opposite to the placement portion 11 .

[0040] The welding head 3 is connected to the main body 1 and is located between two adjacent guide wheels 2 and is used for welding the workpiece 100 to be welded.

[0041] The air blowing assembly 4 includes a bracket 41 connected to the main body 1 and an air nozzle 42 threadedly connected to the bracket 41. The air nozzle 42 extends between two adjacent guide wheels 2 and is adjacent to the welding head 3. The air nozzle 42 has a polygonal peripheral wall.

[0042] The disassembly component 5 is provided with a disassembly end 51 for extending into two adjacent guide wheels 2, and the disassembly end 51 is provided with a disassembly groove 511 for sleeve-mounting the air nozzle 42 and matching with the surrounding wall.

[0043] In the welding device, the placement portion 11 of the main body 1 can be used to place the workpiece 100 to be welded. At least two side-by-side guide wheels 2 are rotatable relative to the main body 1, and one side of each is opposite to the placement portion 11. The guide wheels 2 cooperate with the placement portion 11 to support and guide the workpiece 100 to be welded, thereby achieving stable welding of the workpiece 100 to be welded. The welding head 3 connected to the main body 1 between the two guide wheels 2 can weld the workpiece 100 to be welded from the gap between the two side-by-side guide wheels 2, thereby achieving welding of the workpiece 100 to be welded while having a relatively compact structure. The bracket 41 connected to the main body 1 in the blowing assembly 4 provides support for the gas nozzle 42, which is threadedly connected to the bracket 41 and extends between two adjacent guide wheels 2 and adjacent to the welding head 3. In the welding process, inert gas can be blown into the welding area of ​​the workpiece 100 to be welded, thereby improving the quality of the weld. The gas nozzle 42 has a polygonal peripheral wall, and the disassembly end 51 of the disassembly component 5 in the welding device is provided with a disassembly groove 511 for sleeve-mounting the gas nozzle 42 and matching with the peripheral wall. When the air nozzle 42 is blocked and needs to be replaced, the disassembly end 51 can be extended into the space between two adjacent guide wheels 2, and the disassembly groove 511 can be set on the air nozzle 42. The disassembly groove 511 is consistent with the polygonal peripheral wall of the air nozzle 42. Then, rotating the disassembly component 5 can rotate the disassembly end 51, and the rotation is transmitted to the air nozzle 42. The air nozzle 42 rotates relative to the bracket 41, so that the threaded air nozzle 42 can be separated from the bracket 41, and the air nozzle 42 located in the disassembly groove 511 can be pulled out from between the two guide wheels 2 together with the disassembly component 5. The disassembly is fast, and the position of the bracket 41 does not change. There is no need to adjust the position of the air nozzle 42 and the bracket 41. When installing the air nozzle 42, the disassembly component 5 is also used to complete the installation of the air nozzle 42. The disassembly process is fast, which can improve the inspection and maintenance of the welding device and the welding efficiency.

[0044] And when the welding device is a Mibach laser welder, the main body 1 of the welding device is the welding machine main body 1 of the Mibach laser welder, the placement part 11 is the lower support wheel of the Mibach laser welder, the guide wheel 2 is the upper guide wheel 2 of the Mibach laser welder, and the welding head 3 can be a laser gun, etc. The laser gun performs laser welding on the workpiece 100 to be welded. The cooperation between the disassembly and assembly part 5 and the air nozzle 42 can effectively improve the maintenance efficiency of the air nozzle 42 of the Mibach laser welder, which is beneficial to the normal welding of the Mibach laser welder, ensures the welding efficiency, and ensures the normal operation of the production line where the Mibach laser welder is located to improve production efficiency. Compared with the Mibach laser welder, after reinstalling the air nozzle 42, the angle of the air nozzle 42 needs to be readjusted, which takes nearly half an hour. The time for replacing and disassembling the air nozzle 42 can be reduced to a few minutes, effectively improving the maintenance efficiency. For some production lines equipped with Miebach laser welding machines, the modification of the gas nozzle 42 and the disassembly and assembly part 5 can reduce the downtime by 0.5 hours for each failure, reduce the downtime by 3 hours per year, and reduce the waste by 135 tons. Based on the product selling price of 5,000 yuan / ton, waste of 2,000 yuan / ton, and the unit machine-hour efficiency of 1,000 yuan, the present invention can generate an economic benefit of [135*(5,000-2,000)+3.0*1,000]*1=408,000 yuan per year.

[0045] During the welding process of the welding device, inert gas is blown into the weld area of ​​the workpiece 100 to be welded through the gas nozzle 42, which can effectively protect the weld molten pool from being oxidized; effectively reduce the spatter generated during the welding process; promote the uniform spreading of the weld molten pool during solidification, so that the weld is uniform and beautiful; effectively reduce the shielding effect of the plasma cloud on the laser during the welding process, and increase the effective utilization rate of the laser; and effectively reduce the generation of weld pores, thereby ultimately enhancing the strength of the plate and strip weld joint and ensuring the quality of the weld.

[0046] It should be noted that, for at least two guide wheels 2 arranged side by side, there is a gap between every two adjacent guide wheels 2 . Figure 2 It shows the welding working status of the welding device. Figure 2 The workpiece 100 to be welded can be a metal strip. When the welding device is a Miebach laser welder, the metal strip can pass between the guide wheel 2 of the Miebach laser welder and the support wheel configured as the placement part 11. The welding head 3 of the laser gun welds the metal strip. When the welding device is welding, the gas nozzle 42 can spray inert gas to the workpiece 100. When the welding device is welding the workpiece 100, the disassembly part 5 can be placed on the main body 1 or detachably connected to the main body 1, and the gas nozzle 42 can be used in conjunction with the gas nozzle 42 when the gas nozzle 42 needs to be replaced.

[0047] Figure 3 A schematic diagram of the maintenance process of a welding device in some embodiments or certain embodiments is shown, referring to Figure 3When it is necessary to disassemble the air nozzle 42 from the bracket 41, the disassembly end 51 of the disassembly part 5 can be inserted between the two guide wheels 2, and the disassembly groove 511 of the disassembly end 51 can be sleeved on the air nozzle 42. The disassembly part 5 is rotated to rotate the air nozzle 42, so that the air nozzle 42 and the bracket 41 are rotated and separated or threadedly connected, and the disassembly is faster. Figure 3 The disassembly and assembly part 5 is in a state of just extending into between the two guide wheels 2 and not yet being sleeved on the air nozzle 42.

[0048] In some embodiments, the length, width or height of the disassembly end 51 may be smaller than the minimum gap between the two guide wheels 2, so that the disassembly end 51 can be inserted between the two guide wheels 2 from different angles to cooperate with the air nozzle 42 located between the two guide wheels 2 for disassembly and assembly, which is beneficial to improving the disassembly and assembly efficiency of the air nozzle 42.

[0049] It should be noted that the two points on the surface corresponding to the disassembly end 51 with the largest distance may also be slightly larger than the minimum gap between the two guide wheels 2. According to the distance between the two guide wheels 2 and the position of the air nozzle 42 in the two guide wheels 2, the disassembly end 51 may also be extended between the two guide wheels 2 to disassemble the air nozzle 42. This application does not impose any limitation on this.

[0050] Figure 4 A schematic diagram showing the structure of a disassembly and assembly part in some embodiments or certain embodiments is shown, referring to Figure 4 It can be known that the disassembly end 51 can be columnar, the opening of the disassembly groove 511 can be oriented toward the axial direction of the disassembly end 51, and the maximum diameter corresponding to the peripheral wall of the disassembly end 51 can be smaller than the minimum gap between the two guide wheels 2. This facilitates the preparation of the disassembly end 51, and the disassembly end 51 can also be easily inserted between the two guide wheels 2 to cooperate with and disassemble the air nozzle 42 between the two guide wheels 2.

[0051] In some embodiments, the disassembly component 5 includes a columnar disassembly portion 52 and a force-bearing portion 53 , one end of the disassembly portion 52 is configured as a disassembly end 51 , and an axial angle exists between the disassembly portion 52 and the force-bearing portion 53 .

[0052] The disassembly component 5 includes a columnar disassembly portion 52 and a force-bearing portion 53, and one end of the disassembly portion 52 is configured as a disassembly end 51. There is an angle between the axial directions of the disassembly portion 52 and the force-bearing portion 53. This structure makes the extension directions of the disassembly portion 52 and the force-bearing portion 53 different, effectively utilizing a smaller space, and then by applying a force to the force-bearing portion 53, the disassembly portion 52 acts on the air nozzle 42.

[0053] In some embodiments, one end of the force-bearing portion 53 is connected to the other end of the disassembly portion 52. The structure of the disassembly member 5 is relatively simple, and the action range of the disassembly end 51 of the disassembly portion 52 can be increased.

[0054] In some embodiments, the peripheral wall of the disassembly and assembly portion 52 is provided with knurling 521, and the force-bearing portion 53 is a hexagonal prism.

[0055] The knurling 521 on the disassembly portion 52 can prevent the disassembly part 5 from slipping when in use. Since the stability of the replacement of the air nozzle 42 is improved, the force-bearing portion 53 is a hexagonal prism. When the air nozzle 42 is replaced by the disassembly groove 511 at the disassembly end 51 in the disassembly portion 52, the force-bearing portion 53, in addition to being a location for applying force, can also be used to remove structures such as bolts on the welding device.

[0056] In some embodiments, the disassembly component 5 may also only include a columnar disassembly portion 52, and one end is configured as the disassembly end 51, or the disassembly end 51 may also be columnar, and the portion where the disassembly component 5 is connected to the disassembly end 51 is of a special shape, so that the air nozzle 42 can also be disassembled and replaced.

[0057] It should be noted that the columnar shape involved in the present application may be a prism or a cylinder, or a coaxially connected prism or cylinder structure, etc.

[0058] In some embodiments, the disassembly end 51 may be columnar, the opening of the disassembly slot 511 extends along the axial direction of the disassembly end 51, and the peripheral wall of the disassembly end 51 contacts the two inserted guide wheels 2. The guide wheel can limit the disassembly end 51, so that the disassembly end 51 and the disassembly portion 52 can rotate stably to realize the disassembly of the air nozzle 42.

[0059] In some embodiments, the end faces of two adjacent guide wheels 2 are opposite, and the air nozzle 42 extends into the two guide wheels 2 in a direction that forms an angle with the axial direction of the guide wheels 2. This is beneficial to improving the space utilization between the two guide wheels 2, and also facilitates the insertion of the disassembly component 5 and the disassembly and replacement of the air nozzle 42.

[0060] Figure 5 FIG. 1 shows a schematic diagram of the structure of a gas nozzle in some embodiments or some embodiments, referring to FIG. Figure 5 In some embodiments, the air nozzle 42 includes a connecting portion 421, a limiting portion 422, and a matching portion 423, which are all cylindrical and coaxially connected in sequence. The connecting portion 421 is threadedly connected to the bracket 41. The maximum diameter of the limiting portion 422 is greater than or equal to the maximum diameter of the matching portion 423. The peripheral wall of the matching portion 423 is configured in a polygonal shape. It is convenient to achieve the connection between the bracket 41 and the air nozzle 42. The maximum diameter of the limiting portion 422 is greater than or equal to the maximum diameter of the matching portion 423. The limiting portion 422 can play a role of abutting and limiting the disassembly end 51, which is convenient for disassembly and assembly of the air nozzle 42.

[0061] In some embodiments, the connection portion 421 may be provided with an internal thread, the bracket 41 may be provided with an external thread, the outer peripheral wall of the matching portion 423 may be a regular hexagonal shape, and the maximum diameter of the limiting portion 422 may be equal to the maximum diameter of the matching portion 423. It is easy to prepare and has a good use effect.

[0062] In some embodiments, the support 41 may include:

[0063] The supporting portion 411 is provided with a through hole (not shown in the figure) penetrating the supporting portion 411 .

[0064] One end of the tubular portion 412 is connected to the support portion 411 and communicated with the through hole, and the other end of the tubular portion 412 is threadedly connected to the air nozzle 42 .

[0065] This facilitates the support of the air nozzle 42 and the ventilation of the air nozzle 42 .

[0066] In some embodiments, the tubular portion 412 includes at least two tube segments 4121 that are rotatably connected and capable of damping rotation with each other. While the position of the air nozzle 42 can be adjusted to a corresponding position, the air nozzle 42 can also be fine-tuned according to the structure of the workpiece 100 to be welded.

[0067] In some embodiments, the welding device may further include a gas supply carrier 6 connected to the through hole of the support portion 411, and the gas supply carrier 6 may be a gas cylinder or a gas supply box, etc., which delivers inert gas to the gas nozzle 42 through the tubular portion 412. The lifting portion 12 may be configured as a block or frame structure according to the situation, and the lifting and lowering of the lifting portion 12 relative to the placement portion 11 may be achieved by a structure such as a telescopic cylinder or a jack.

[0068] In some embodiments, the main body 1 includes a lifting part 12 that can be lifted relative to the placement part 11, and the guide wheel 2 and the welding head 3 are both arranged on the lifting part 12. It is convenient to adjust the distance between each structure and the placement part 11, and it is also convenient for the disassembly part 5 to enter the guide wheel 2 and disassemble and replace the air nozzle 42.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0070] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0071] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A welding device, characterized in that: include: The main body is provided with a placement portion for placing the workpiece to be welded; At least two adjacent guide wheels are rotatably disposed on the main body and one side of each of the guide wheels is opposite to the placement portion; A welding head, connected to the main body and located between two adjacent guide wheels, for welding the workpiece to be welded; A blowing assembly, comprising a bracket connected to the main body, and a gas nozzle threadedly connected to the bracket, the gas nozzle extending between two adjacent guide wheels and adjacent to the welding head, the gas nozzle having a polygonal peripheral wall; The disassembly and assembly part is provided with a disassembly and assembly end for extending into between two adjacent guide wheels, and the disassembly and assembly end is provided with a disassembly and assembly groove for sleeve-mounting the air nozzle and matching with the peripheral wall.

2. The welding device according to claim 1, characterized in that: The disassembly component includes a columnar disassembly portion and a control portion, one end of the disassembly portion is configured as the disassembly end, and an angle exists between the axial directions of the disassembly portion and the control portion.

3. The welding device according to claim 2, characterized in that: One end of the control part is connected to the other end of the detachable part.

4. The welding device according to claim 2, characterized in that: The peripheral wall of the disassembly and assembly part is provided with knurling, and the control part is a hexagonal column.

5. The welding device according to any one of claims 1 to 4, characterized in that: The disassembly end is columnar, the opening of the disassembly groove extends along the axial direction of the disassembly end, and the peripheral wall of the disassembly end contacts the two guide wheels.

6. The welding device according to claim 5, characterized in that: The end surfaces of two adjacent guide wheels are opposite to each other, and the air nozzle extends into the two guide wheels along a direction forming an angle with the axial direction of the guide wheels.

7. The welding device according to any one of claims 1 to 4, characterized in that: The air nozzle includes a connecting part, a limiting part and a matching part, which are all cylindrical and coaxially connected in sequence. The connecting part is threadedly connected to the bracket. The maximum diameter of the limiting part is greater than or equal to the maximum diameter of the matching part. The surrounding wall of the matching part is configured as a polygon.

8. The welding device according to any one of claims 1 to 4, characterized in that: The support comprises: The supporting part is provided with a through hole penetrating the supporting part; The tubular portion has one end connected to the support portion and communicated with the through hole, and the other end of the tubular portion is threadedly connected to the air nozzle.

9. The welding device according to claim 8, characterized in that: The tubular portion includes at least two tube sections which are rotatably connected and capable of damping rotation with each other.

10. The welding device according to any one of claims 1 to 4, characterized in that: The main body comprises a lifting part which can be lifted and lowered relative to the placing part, and the guide wheel and the welding head are both arranged on the lifting part.

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