A welding device and its welding head

Abstract

This application belongs to the field of metal welding technology and provides a welding head, including welding needles, a distributor, and a cooling assembly. Multiple welding needles are arranged side-by-side. The distributor diverts input gas to the welding needles. The cooling assembly cools the welding needles. One end of each welding needle is connected to the distributor, and the other end of each welding needle passes through the cooling assembly and extends further. The extended end of each welding needle is a welding end, and at least a portion of each welding needle is located inside the cooling assembly. This application also provides a welding apparatus having the above-described welding head. This application addresses the welding requirements of metal products composed of pipe arrays, solving the technical problem of insufficient temperature dispersion in existing machine welding techniques.

Description

Technical Field

[0001] This application belongs to the field of metal welding technology, and specifically refers to a welding device and welding head for welding metal pipe fittings. Background Technology

[0002] Common metal tubing products, such as radiators, typically consist of multiple tubing arrays. Each tubing array is connected to a mounting plate at both ends, with holes corresponding to the openings of each tubing. During manufacturing, each opening of the tubing needs to be welded to the holes on the mounting plates to create the tubing interface and form a complete radiator. As can be seen, the high density of the tubing and the small spacing between the holes on the mounting plates increase the difficulty of welding and require a high degree of precision.

[0003] There are two common welding methods for the above-mentioned products. One method is machine welding using welding equipment. For batch welding, multiple welding nozzles need to be set up side by side to weld various parts simultaneously, ensuring the uniformity of the finished products. However, because the pipes are thin sheets, especially the joints, which are relatively fragile, and the spacing between the pipes is small, the high density of multiple welding nozzles makes it easy for heat to transfer between the nozzles during actual welding. This uneven heat distribution at the weld points can easily melt the joints of the pipes, resulting in a low yield. If the temperature of each welding nozzle is lowered, welding becomes impossible.

[0004] Another type involves manual welding, which requires operating individual welding nozzles and tracing the welding points one by one on the pipe joints. Based on operational experience, fine-tuning can be made according to situations that arise during the welding process to ensure the integrity of each welded part. However, this method is too slow and has low production efficiency; moreover, the working environment is extremely hot, making it uncomfortable, and manual operation of the welding machine is prone to accidents, posing significant safety hazards.

[0005] It is evident that the current welding technology cannot meet the production requirements for processing metal products composed of pipes. Summary of the Invention

[0006] The purpose of this application is to provide a welding device and its welding head, which are designed for the welding needs of metal products composed of pipes, so as to solve the technical problem that the temperature of the welding nozzle cannot be dispersed when using machine welding in the prior art.

[0007] To achieve the above objectives, the technical solution adopted in this application is: to provide a welding head, comprising:

[0008] Welding needles, wherein there are multiple welding needles arranged side by side;

[0009] A distributor is used to divert the input gas to the welding needle;

[0010] A cooling assembly for cooling the welding pin;

[0011] One end of each of the plurality of welding pins is connected to the distributor, and the other end of each of the plurality of welding pins passes through the cooling assembly and continues to extend; the extended end of each welding pin is a welding end, and at least a portion of each welding pin is located inside the cooling assembly.

[0012] The beneficial effects of the welding head provided in this application are as follows: Compared with the prior art, this welding head consists of a distributor, welding needles, and a cooling assembly. The distributor delivers the input gas to each welding needle so that each welding needle is heated for welding after ignition. Using thin, strip-shaped welding needles improves welding precision. The multiple welding needles are arranged side-by-side to match the interface positions of various pipe openings on the pipe, enabling simultaneous welding of multiple pipe interfaces, effectively improving welding efficiency and uniformity.

[0013] To control the heating temperature of each welding pin, a cooling assembly is installed. Each welding pin extends beyond this cooling assembly, with the extended end serving as the welding end. This serves two purposes: firstly, it fixes the position of each welding pin, ensuring equal spacing between adjacent pins and preventing them from touching and transferring heat; secondly, it ensures that at least a portion of each welding pin near the welding end is cooled within the cooling assembly, effectively reducing heat accumulation and preventing the pin temperature from exceeding the preset temperature, which could lead to heat melting and damage at the welded area on the workpiece. This, in turn, improves welding accuracy and yield.

[0014] The structure of the cooling assembly is improved. The cooling assembly includes a water-cooled box with first through holes on opposite end faces for the welding pins to pass through. A water-passing channel is provided inside the water-cooled box, and the first through holes communicate with the water-passing channel. Each welding pin portion located inside the water-cooled box is placed within the water-passing channel. This allows the welding pin portions inside the water-cooled box to be immersed in the cooling water flow of the water-passing channel, effectively cooling each welding pin and ensuring uniform temperature across the welding head.

[0015] Furthermore, sealing elements are respectively provided on the opposite two end faces of the water-cooled box. The sealing elements are used to seal the gap between the first perforation and the outer periphery of the welding needle, so as to prevent the water in the water passage from seeping out from the gap between the outer periphery of the welding needle and the first perforation, effectively preventing the loss of cooling water and improving the sealing effect.

[0016] The cooling assembly is further improved by including an air-cooling box. Each of the opposite end faces of the air-cooling box has a second through-hole for the welding needle to pass through. The second through-holes of the air-cooling box have venting openings. This allows the cooling gas inside the air-cooling box to escape through the venting openings, thereby cooling the area around the welding head. Furthermore, the cooling gas vented from the air-cooling box diffuses and covers the welding area of ​​the workpiece, effectively preventing workpiece oxidation.

[0017] Furthermore, the second perforation on the air-cooled box corresponds one-to-one with the first perforation on the water-cooled box. The end of the welding needle furthest from the distributor passes sequentially through the first perforation on both the water-cooled and air-cooled boxes and continues to extend. This allows at least a portion of each welding needle to be cooled by water within the water-cooled box, while at least another portion is further cooled by cooling gas within the air-cooled box, effectively controlling the heating temperature of each welding needle. In addition, the cooling gas within the air-cooled box diffuses out through the second perforation onto the welding area of ​​the workpiece, effectively preventing oxidation of the workpiece.

[0018] Optionally, the air-cooled box has an outer chamber and an inner chamber, with the inner chamber housed within the outer chamber. The inner chamber has an air vent communicating with the outer chamber. A second perforation is formed in the inner chamber. An inlet pipe and an outlet pipe are connected to opposite sides of the air-cooled box, respectively, and both communicate with the outer chamber. This creates an inner and outer chamber structure within the air-cooled box. Because the second perforation is in the inner chamber, the welding needle portion within the air-cooled box is located within the inner chamber. The air vent communicating with the outer chamber allows cooling gas introduced from the inlet and outlet pipes into the outer chamber to accumulate in the inner chamber, thus concentrating cooling of the welding needle portion within the inner chamber, effectively improving the concentration of cooling gas and consequently enhancing the cooling effect on the welding needle.

[0019] The structure of the distributor is improved by including an internal gas collecting chamber. The distributor has an inlet and a connecting hole communicating with the gas collecting chamber, with the inlet and connecting hole positioned opposite each other. The inlet is used to connect to a gas pipeline. The number of connecting holes is the same as the number of welding pins, and each connecting pin is connected to one of them. This allows the input gas to first accumulate in the gas collecting chamber of the distributor, and then be delivered to the welding pins through the connecting holes, effectively improving the gas delivery efficiency.

[0020] Optionally, the distributor is provided with a flow divider plate located within the gas collecting chamber, the flow divider plate being disposed between the air inlet and the connecting hole. In this way, the flow divider plate diverts the gas input from the air inlet, causing the gas entering the gas collecting chamber from the air inlet to be blocked and diffused by the flow divider plate, reaching each connecting hole and being delivered to each welding pin, ensuring that each welding pin can be ignited and is in working condition.

[0021] Optionally, the distributor is further provided with a sealing sleeve installed on the connection hole. The sealing sleeve is sleeved with the end of the welding needle to seal the connection between the welding needle and the connection hole on the distributor, thereby improving the sealing effect and preventing leakage of the transported gas.

[0022] This application also provides a welding device, including a worktable, a movable arm, and the aforementioned welding head. The worktable is used to mount workpieces; the welding head is disposed on the movable arm, and the movable arm drives the welding head to move on the worktable so as to simultaneously weld the interface parts of each pipe row, thereby automating the welding process, effectively improving the uniformity of operation, reducing manual intervention, and eliminating the safety hazards associated with manual operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the welding apparatus provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the three-dimensional result of the welding head provided in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the internal structure of the welding head provided in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the exploded structure of the water-cooled box provided in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the internal structure of the cooling component provided in an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the exploded structure of the gas-cooled box provided in an embodiment of this application;

[0030] Figure 7 for Figure 6A schematic diagram of the enlarged structure of part B;

[0031] Figure 8 This is a schematic diagram of the exploded structure of the shunt provided in the embodiment of this application;

[0032] Figure 9 for Figure 3 A magnified structural diagram of part A.

[0033] The following are the labeling elements in the figure:

[0034] 100 - Welding head; 200 - Cooling assembly; 300 - Worktable; 400 - Movable arm;

[0035] 1- Welding pin;

[0036] 2-Diverter; 20-Gas collection chamber; 21-Inlet port; 22-Connection hole; 23-Diverter plate; 24-Sealing sleeve;

[0037] 3-Water-cooled box; 31-First perforation; 32-Water passage; 33-Water inlet; 34-Water outlet; 35-Seal;

[0038] 4-Air-cooled box; 41-Second perforation; 411-Ventilation notch; 42-Outer chamber; 43-Inner chamber; 431-Ventilation hole; 44-Inlet pipe; 45-Outlet pipe. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application 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 application.

[0042] 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 that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] The welding apparatus and welding head provided in the embodiments of this application will now be described in detail. The welding apparatus of this application is mainly used for welding the various pipe interfaces of a pipe fitting device similar to a radiator.

[0044] Please refer to the following: Figure 1 and Figure 2 The welding apparatus has the welding head 100 of this application, which includes a plurality of welding needles 1 arranged side by side, a flow divider 2 and a cooling assembly 200.

[0045] The distributor 2 is used to connect to the gas pipeline and distribute the input gas to each welding pin 1. In this embodiment, the gas is preferably coal gas.

[0046] One end of each of the plurality of welding pins 1 is connected to the distributor 2, and the other end of each of the plurality of welding pins 1 passes through the cooling assembly 200 and continues to extend. The extended end of the welding pin 1 is the welding end used for welding the workpiece.

[0047] At least a portion of each welding pin 1 is located inside the cooling assembly 200, allowing the cooling assembly 200 to cool each welding pin 1 and define the spacing between adjacent welding pins 1.

[0048] Compared with the prior art, the welding head 100 of the welding apparatus provided in this application embodiment consists of a distributor 2, welding needles 1, and a cooling assembly 200. The distributor 2 delivers the input gas to each welding needle 1 so that each welding needle 1 is heated for welding after ignition. Welding using thin strip-shaped welding needles 1 can improve welding accuracy. The multiple welding needles 1 are arranged side by side to match the interface positions of each pipe port on the pipe, enabling simultaneous welding of multiple pipe interfaces, effectively improving welding efficiency and uniformity.

[0049] To control the heating temperature of each welding pin 1, a cooling assembly 200 is provided. Each welding pin 1 extends beyond the cooling assembly 200, and the extended end serves as the welding end of the welding pin 1. This serves two purposes: firstly, it fixes the position of each welding pin 1, ensuring equal spacing between adjacent welding pins 1 and preventing them from easily touching and transferring heat between each other; secondly, it ensures that at least a portion of each welding pin 1 near the welding end is cooled inside the cooling assembly 200, effectively reducing heat accumulation between adjacent welding pins 1 and preventing the temperature of the welding pin 1 from exceeding the preset temperature, which could lead to heat melting and damage at the welding point on the workpiece, thereby improving welding accuracy and yield.

[0050] In one embodiment of this application, please refer to Figure 1 The welding device of this application includes a worktable 300 and a movable arm 400. The worktable 300 is used to install workpieces, and the welding head 100 is set on the movable arm 400. The movable arm 400 drives the welding head 100 to move on the worktable 300 so as to simultaneously weld the interface parts of each pipe row, thereby automating the welding process, effectively improving the uniformity of operation, reducing manual intervention, and eliminating the safety hazards of manual operation.

[0051] Please refer to the embodiments in this application as well. Figure 3 and Figure 4 The cooling assembly 200 includes a water-cooled box 3. Each of the two opposite ends of the water-cooled box 3 has a first through-hole 31 for the welding pins 1 to pass through. A water-passing channel 32 is provided inside the water-cooled box 3. The first through-holes 31 communicate with the water-passing channel 32, and each welding pin 1 located inside the water-cooled box 3 is placed within the water-passing channel 32. This allows the welding pins 1 located inside the water-cooled box 3 to be immersed in the cooling water flow of the water-passing channel 32, effectively cooling each welding pin 1 and ensuring uniform temperature across all welding pins 1 on the welding head 100.

[0052] In this embodiment, as Figure 4 As shown, the water passage 32 is preferably a serpentine passage, thereby improving the space utilization inside the water-cooled box 3.

[0053] The water-cooled box 3 has an inlet 33 and an outlet 34 on opposite sides of the water passage 32. Thus, when cooling water enters the water-cooled box 3 through the inlet 33, it flows through the water passage 32 and then out through the outlet 34. This creates a unidirectional flow path in the water passage 32, effectively cooling the welding pin 1 and dissipating the heat, thereby improving the cooling effect.

[0054] Please refer to the embodiments in this application as well. Figure 4 and Figure 5Sealing elements 35 are respectively provided on the opposite two ends of the water-cooled box 3. The sealing elements 35 are used to seal the gap between the first perforation 31 and the outer periphery of the welding needle 1 to prevent the water in the water passage 32 from seeping out from the gap between the outer periphery of the welding needle 1 and the first perforation 31, effectively preventing the loss of cooling water and improving the sealing effect.

[0055] In this embodiment, the sealing element 35 is preferably a sealing gasket fixed to the opposite end faces of the water-cooled box 3, so as to increase the fixing area with the end faces of the water-cooled box 3 and simultaneously cover each of the first through holes 31. In other embodiments of this embodiment, the sealing element 35 may also be a sealing ring respectively disposed on the first through holes 31, so as to reduce material costs and achieve the same sealing effect. The structure of the sealing element 35 is not specifically limited here.

[0056] Please refer to the embodiments in this application as well. Figure 3 , Figure 5 and Figure 6 The cooling assembly 200 also includes an air-cooled box 4, on which opposite end faces have second through holes 41 for the welding pins 1 to pass through, as shown in the image. Figure 7 As shown, the second perforation 41 of the air-cooled box 4 has a venting notch 411. This allows the cooling gas inside the air-cooled box 4 to escape through the venting notch 411, thereby cooling the area around the welding head 100. Furthermore, the cooling gas exiting the air-cooled box 4 diffuses and covers the welding area of ​​the workpiece, effectively preventing oxidation. Nitrogen gas is preferably used as the cooling gas.

[0057] In other embodiments, the diameter of the second perforation 41 can be set to be larger than the diameter of the welding needle 1, so that there is a venting gap in the second perforation 41 that is spaced apart from the outer periphery of the welding needle 1, so that the cooling gas in the air-cooled box 4 can be discharged from the venting gap to achieve the same cooling effect.

[0058] Please refer to the following: Figure 3 and Figure 5 The second perforation 41 on the air-cooled box 4 corresponds one-to-one with the first perforation 31 on the water-cooled box 3, so that the end of the welding needle 1 away from the shunt 2 can pass through the first perforation 31 on the water-cooled box 3 and the second perforation 41 on the air-cooled box 4 in sequence and continue to extend.

[0059] On the one hand, at least a portion of each welding pin 1 is cooled by water in the water-cooled box 3, and at least another portion is further cooled by cooling gas in the air-cooled box 4, effectively controlling the heating temperature of each welding pin 1.

[0060] On the other hand, such as Figure 3As shown, since the welding needle 1 extends after passing through the water-cooled box 3 and the air-cooled box 4 in sequence, the extended end of the welding needle 1 is the welding end, thus making the welding end of the welding needle 1 close to the air-cooled box 4. In this way, the cooling gas in the air-cooled box 4 can escape from the second perforation 41 and diffuse onto the welding part of the workpiece, effectively preventing the workpiece from oxidizing.

[0061] Please refer to the embodiments in this application as well. Figure 5 and Figure 6 The air-cooled box 4 has an outer chamber 42 and an inner chamber 43 inside. The inner chamber 43 is housed in the outer chamber 42, so that the air-cooled box 4 has a structure with inner and outer chambers.

[0062] Among them, such as Figure 6 As shown, the second perforation 41 on the air-cooled box 4 is opened on the inner cavity 43 so that the welding pins 1 located inside the air-cooled box 4 are all in the inner cavity 43.

[0063] The inner chamber 43 is provided with an air passage 431 that communicates with the outer chamber 42. An air inlet pipe 44 and an air outlet pipe 45 are respectively connected to opposite sides of the air-cooled box 4, and these pipes communicate with the outer chamber 42. This allows the cooling gas entering the outer chamber 42 from the air inlet pipe 44 and air outlet pipe 45 to accumulate in the inner chamber 43, concentrating on cooling the welding needle 1 located within the inner chamber 43. This effectively improves the concentration of the cooling gas, thereby enhancing the cooling effect on the welding needle 1.

[0064] In this embodiment, as Figure 3 As shown, the air inlet pipe 44 and the air outlet pipe 45 on the air-cooled box 4 are rigid pipes. The two ends of the air inlet pipe 44 and the air outlet pipe 45 are respectively connected to the air-cooled box 4 and the distributor 2 to improve the structural strength of the entire welding head 100.

[0065] Please refer to the embodiments in this application as well. Figure 3 , Figure 8 and Figure 9 The distributor 2 has a gas collecting chamber 20 inside. The distributor 2 has an air inlet 21 and a connecting hole 22 communicating with the gas collecting chamber 20, and the air inlet 21 and the connecting hole 22 are arranged opposite to each other. The air inlet 21 is used to connect to the gas pipeline, and the number of connecting holes 22 is the same as that of the welding needles 1, and each connecting hole 22 is connected to the welding needle 1. In this way, the input gas first gathers in the gas collecting chamber 20 of the distributor 2, and then is delivered to each welding needle 1 through the connecting holes 22, effectively improving the gas delivery efficiency.

[0066] In one embodiment of this application, please refer to the following: Figure 8 and Figure 9The distributor 2 is equipped with a diverter plate 23 located within the gas collecting chamber 20, which is positioned between the air inlet 21 and the connecting hole 22. In this way, the diverter plate 23 diverts the gas entering from the air inlet 21, causing the gas entering the gas collecting chamber 20 from the air inlet 21 to be blocked and diffused by the diverter plate 23, reaching each connecting hole 22 and being delivered to each welding needle 1, ensuring that each welding needle 1 can be ignited and is in working condition.

[0067] Preferably, please refer to Figure 9 The distributor 2 is also provided with sealing sleeves 24 installed on each connection hole 22. The sealing sleeves 24 are sleeved with the end of the welding needle 1 to seal the connection between the welding needle 1 and the connection hole 22 on the distributor 2, thereby improving the sealing effect and preventing leakage of the transported gas. In this embodiment, the sealing sleeve 24 is preferably a hollow soft rubber sleeve so that the gas can flow from the sleeve and be transported into the welding needle 1.

[0068] In one embodiment of this application, please refer to the following: Figure 1 , Figure 3 and Figure 9 The welding head 100 is suspended on the movable arm 400. From top to bottom, the welding head 100 is equipped with a distributor 2, welding needles 1, a water-cooled box 3, and an air-cooled box 4. The upper end of each welding needle 1 is connected to the connection hole 21 of the distributor 2, and the lower end of the welding needle 1 extends from the second through hole 41 at the bottom of the air-cooled box 4 and continues to extend. The extended end of the welding needle 1 is used for welding. Thus, the water-cooled box 3 cools the welding needle 1 portion within the water passage 32, and the air-cooled box 4 cools the welding needle 1 portion located inside the air-cooled box 4. Cooling gas then escapes from the second through hole 41 and diffuses onto the extended end of the welding needle 1. When the extended end of the welding needle 1 works on the welding area of ​​the workpiece, the cooling gas covers the welding area to prevent oxidation.

[0069] Furthermore, utilizing the principle of gas rising, at least a portion of the cooling gas can rise to the connection point between the welding needle 1 and the connection hole 21 of the distributor 2. This allows the cooling gas to simultaneously cool the sealing sleeve 24 located in the connection hole 21 of the distributor 2, thereby preventing the sealing sleeve 24 from melting and effectively extending its service life.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A welding head, characterized in that, The welding head is used to suspend on the movable arm, and the welding head includes, from top to bottom, a distributor, a welding needle, and a cooling assembly: The welding needles are multiple and arranged side by side; The distributor is used to divert the input gas to the welding needle; The cooling component is used to cool the welding pin; One end of each of the plurality of welding pins is connected to the distributor, and the other end of each of the plurality of welding pins passes through the cooling assembly and continues to extend; the extended end of each welding pin is a welding end, and at least a portion of each welding pin is located inside the cooling assembly; The cooling assembly includes a water-cooled box, with first through holes on opposite end faces for the welding pins to pass through. The interior of the water-cooled box is provided with a water passage, and the first through holes communicate with the water passage. The cooling assembly also includes an air-cooled box, on which opposite end faces of the air-cooled box have second through holes for the welding pins to pass through, and the second through holes of the air-cooled box have ventilation gaps; The second perforation on the air-cooled box corresponds one-to-one with the first perforation on the water-cooled box. The end of the welding needle away from the shunt passes through the first perforation on the water-cooled box and the second perforation on the air-cooled box in sequence and continues to extend. The air-cooled box has an outer chamber and an inner chamber, with the inner chamber housed within the outer chamber. The inner chamber has an air vent that communicates with the outer chamber. A second through hole is formed in the inner chamber. An air inlet pipe and an air outlet pipe are connected to opposite sides of the air-cooled box, and the air inlet pipe and the air outlet pipe communicate with the outer chamber, respectively. The distributor has an internal gas collecting chamber, and the distributor has an air inlet and a connecting hole that communicate with the gas collecting chamber. The air inlet and the connecting hole are arranged opposite to each other. The air inlet is used to connect to a gas pipeline. The number of connecting holes is the same as the number of welding pins, and each of them communicates with the welding pins. The distributor is also provided with a sealing sleeve installed on the connection hole, and the sealing sleeve is sleeved with the end of the welding needle.

2. The welding head according to claim 1, characterized in that: The water-cooled box is also provided with a sealing element, which is used to seal the gap between the first perforation and the outer periphery of the welding needle.

3. The welding head according to claim 1, characterized in that: The distributor is provided with a flow divider plate located in the air collection chamber, and the flow divider plate is disposed between the air inlet and the connecting hole.

4. A welding apparatus, characterized in that: The device includes a worktable, a movable arm, and a welding head as described in any one of claims 1 to 3, wherein the worktable is used to mount a workpiece; the welding head is disposed on the movable arm, and the movable arm drives the welding head to move on the worktable.

Images