A welding machine for different joint gaps

Abstract

The utility model discloses a kind of welding machines for different splicing gaps, including the plate table of being equipped in the middle part of rack, plate table is respectively equipped with positioning mechanism, argon arc welding mechanism, brazing mechanism and visual camera, and argon arc welding mechanism is located in the side of positioning mechanism, brazing mechanism is located in the other side of positioning mechanism, the top of rack is equipped with argon arc welding wire feeder, first wire feeder and argon arc welding wire feeder device are respectively equipped on argon arc welding wire feeder, brazing wire feeder is equipped on rack, second wire feeder and brazing wire feeder device are respectively equipped on brazing wire feeder.The utility model can select different welding processing tools to weld the splicing of copper pipe and copper base without needing to configure different welding platform, which guarantees good welding effect, reduces the configuration cost of welding equipment and welding processing cost, effectively solves the problems of poor general-purpose of traditional welding platform, high configuration cost of welding equipment and high welding processing cost.

Description

Technical Field

[0001] This utility model relates to the field of welding machines, and more particularly to a welding machine for different splicing gaps. Background Technology

[0002] Argon arc welding and brazing are two distinct metal joining processes. Their core differences lie in their principles, temperature control, joint strength, and application scenarios: 1. Welding process principle: Argon arc welding uses an electric arc to generate high temperatures (6000-8000℃) to melt the base metal and welding material, forming a metallurgically bonded molten pool. Argon gas is used for protection against oxidation. Brazing uses a low-melting-point filler metal (with the base metal remaining solid), relying on capillary action to fill the joint gap, achieving connection through wetting and diffusion; 2. Temperature requirements: Argon arc welding requires reaching the melting point of the base metal (e.g., 1370-1530℃ for stainless steel), while brazing temperatures are lower than the base metal melting point, and are divided into soft brazing (<450℃) and hard brazing (>450℃); 3. Joint strength: Argon arc welding has a weld strength close to that of the base material and is suitable for load-bearing structures (such as pressure vessels and aerospace components). Brazing has a strength lower than that of the base material and is mostly used for precision parts with less stress (such as electronic components and copper pipes). 4. Application scenarios: Argon arc welding is suitable for welding highly reactive metals such as stainless steel, aluminum, and titanium, as well as thin plates (0.5-5mm). It is suitable for fields with high requirements for airtightness. Brazing is used for joining dissimilar materials (such as copper-aluminum, ceramic-metal) or decorative joints. The gap (0.01-0.1mm) must be strictly controlled.

[0003] When joining two different workpieces, the gaps between them may vary. For workpieces with smaller gaps, brazing can be used, while for those with larger gaps, argon arc welding can be employed. Traditional welding platforms use a single welding tool, limiting their ability to weld different workpieces. Their poor versatility necessitates the use of different welding platforms to handle workpieces with varying gaps, resulting in high equipment and processing costs, which hinders industrial development. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a welding machine for different splicing gaps.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The welding machine for different splicing gaps includes a frame, a plate is installed in the middle of the frame, and a positioning mechanism for fixing copper pipes and copper seats, an argon arc welding mechanism for argon arc welding of copper pipes and copper seats, a brazing mechanism for brazing copper pipes and copper seats, and a vision camera for monitoring welding quality are respectively installed on the plate. The argon arc welding mechanism is located on one side of the positioning mechanism, and the brazing mechanism is located on the other side of the positioning mechanism. An argon arc welding wire feeder is installed on the top of the frame. The argon arc welding wire feeder is respectively equipped with a first wire feeder for feeding a first type of wire and an argon arc welding wire feeder for conveying the first type of wire. A brazing wire feeder is installed on the frame. The brazing wire feeder is respectively equipped with a second wire feeder for feeding a second type of wire and a brazing wire feeder for conveying the second type of wire.

[0006] Furthermore, the positioning mechanism includes a fixed base, a fixed base positioning assembly, a three-jaw chuck, and a three-jaw chuck driving assembly. The three-jaw chuck driving assembly is mounted on the platform, and the three-jaw chuck is mounted on the three-jaw chuck driving assembly and used to fix the copper base. The three-jaw chuck driving assembly drives the three-jaw chuck to rotate, thereby causing the copper base to rotate. The fixed base is located above the three-jaw chuck, and the fixed base positioning assembly is mounted on the platform. The fixed base is mounted on the fixed base positioning assembly, and the fixed base positioning assembly drives the fixed base to descend and press the copper tube on the fixed base onto the copper base.

[0007] Specifically, the three-jaw chuck drive assembly includes a drive gear, a gear rotation drive device, a driven gear, and a three-jaw chuck mounting plate. The three-jaw chuck mounting plate and the gear rotation drive device are respectively mounted on the top and bottom surfaces of the platform. The drive gear is rotatably connected to the three-jaw chuck mounting plate and the platform, and is located above the gear rotation drive device. The drive gear is fixedly connected to the output end of the gear rotation drive device. The driven gear is rotatably connected to the three-jaw chuck mounting plate and the platform. The three-jaw chuck is fixedly mounted on the top of the driven gear and is used to fix the copper base. The drive gear and the driven gear mesh and drive each other.

[0008] Specifically, the fixed seat positioning assembly includes a first positioning column, a first positioning rod, a positioning mounting plate, a fixed seat lifting drive device, a connecting plate, a guide rod, and a guide sleeve. The first positioning column is mounted on the platform. One end of the first positioning rod is connected and installed to the first positioning column. The positioning mounting plate is fixedly mounted on the other end of the first positioning rod. The fixed seat lifting drive device is mounted on the positioning mounting plate. The connecting plate is located below the fixed seat lifting drive device and is connected and installed to the output end of the fixed seat lifting drive device. The fixed seat is mounted on the bottom surface of the connecting plate and is used to fix the copper tube. The guide rod moves longitudinally through the positioning mounting plate, and the lower end of the guide rod is fixedly connected to the connecting plate. The guide sleeve is mounted on the positioning mounting plate and is movably sleeved on the guide rod.

[0009] Furthermore, the argon arc welding mechanism includes an argon arc welding base, a first linear guide rail, a first slider, a first drive mounting plate, an argon arc welding gun moving device, an angle adjustment seat, a mounting clamp, an argon arc welding gun, a first wire feeder, and a first wire feed tube. The argon arc welding base is mounted on the platform, the first linear guide rail is fixedly mounted on the argon arc welding base, the first slider is slidably mounted on the first linear guide rail, the angle adjustment seat is fixedly mounted on the first slider, the mounting clamp is rotatably mounted on the angle adjustment seat, the argon arc welding gun is mounted on the mounting clamp and is used for argon arc welding of copper tubes and copper seats, the first wire feed tube is fixed to the mounting clamp through the first wire feeder, the first drive mounting plate is mounted on one end of the first linear guide rail, and the argon arc welding gun moving device is mounted on the first drive mounting plate, with the output end of the argon arc welding gun moving device connected to the first slider.

[0010] Furthermore, the brazing mechanism includes a brazing base, a second linear guide rail, a second slider, a second positioning column, a second positioning rod, a brazing gun, a second wire feeder, a second wire feed tube, a second drive mounting plate, and a brazing gun moving device. The brazing base is mounted on the platform, the second linear guide rail is mounted on the brazing base, the second slider is slidably mounted on the second linear guide rail, the second positioning column is mounted on the top surface of the second slider, one end of the second positioning rod is connected to the second positioning column, the brazing gun is rotatably mounted on the other end of the first positioning rod, the second wire feeder is mounted on the brazing gun, the second wire feed tube is mounted on the second wire feeder, the second drive mounting plate is mounted on one end of the second linear guide rail, and the brazing gun moving device is mounted on the second drive mounting plate, with the output end of the brazing gun moving device connected to the second slider.

[0011] Preferably, a controller or control system is provided for signal control of components such as the positioning mechanism, argon arc welding mechanism, brazing mechanism and vision camera. The controller is a PLC programmable logic controller. The PLC programmable logic controller can be a programmable logic controller of model XDS-40T-D, but is not limited thereto.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. By installing an argon arc welding mechanism and a brazing mechanism on the plate, with the argon arc welding mechanism located on one side of the positioning mechanism and the brazing mechanism located on the other side of the positioning mechanism, different welding processing tools (argon arc welding mechanism or brazing mechanism) can be selected to weld the joint of the copper tube and the copper seat when the gap size of the copper tube and the copper seat is different. Moreover, it does not require the configuration of different welding platforms, thereby improving the versatility of the welding equipment and reducing the configuration cost of the welding equipment and the welding processing cost. In addition, the welding torch angle is adjustable to control the size of the weld point, thereby meeting various welding requirements. It not only solves the problem of the traditional welding platform using a single welding processing tool to weld the copper tube and the copper seat, which leads to the large limitation and poor versatility of welding processing, but also solves the problem of the traditional need to configure different welding platforms to weld two workpieces with different gap sizes, which leads to high configuration cost of welding equipment and high welding processing cost.

[0013] 2. By installing a positioning mechanism on the plate, the positioning mechanism can rotate the copper tube and copper seat to cooperate with the argon arc welding mechanism or the brazing mechanism to perform circular trajectory welding at the splice of the copper tube and copper seat. This ensures that the weld points at the splice of the copper tube and copper seat are continuous, the weld point size is consistent, the welding is firm, and the welding effect and quality are good. It is also equipped with an argon arc welding wire feeding device and a brazing wire feeding device, which enables it to actively feed the wire and the wire feeding angle is adjustable to meet various welding requirements. Attached Figure Description

[0014] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0015] Figure 1 This is a perspective view of a welding machine for different splicing gaps according to the present invention.

[0016] Figure 2 This is an enlarged perspective view of a positioning mechanism for a welding machine with different splicing gaps according to the present invention.

[0017] Figure 3 This is an enlarged perspective view of the argon arc welding mechanism of a welding machine for different splicing gaps according to this utility model.

[0018] Figure 4 This is an enlarged perspective view of the brazing mechanism of a welding machine for different splicing gaps according to this utility model. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] Reference Figure 1 As shown, this utility model discloses a welding machine for different splicing gaps, including a frame 1, a platform 2 installed in the middle of the frame 1, a positioning mechanism 3 for fixing copper pipes and copper seats installed on the platform 2, an argon arc welding mechanism 4 installed on the platform 2, the argon arc welding mechanism 4 being located on one side of the positioning mechanism 3 and used for argon arc welding of copper pipes and copper seats, a brazing mechanism 5 installed on the platform 2, the brazing mechanism 5 being located on the other side of the positioning mechanism 3 and used for brazing of copper pipes and copper seats, a vision camera 6 for monitoring welding quality installed on the platform 2, an argon arc welding wire feeder 7 installed on the top of the frame 1, the argon arc welding wire feeder 7 being respectively equipped with a first wire feeder 81 for feeding a first type of wire and an argon arc welding wire feeder 9 for conveying the first type of wire, a brazing wire feeder 10 installed on the frame 1, the brazing wire feeder 10 being respectively equipped with a second wire feeder 82 for feeding a second type of wire and a brazing wire feeder 11 for conveying the second type of wire.

[0022] Reference Figure 2 As shown, the positioning mechanism 3 includes a fixed base 31, a fixed base positioning component 32, a three-jaw chuck 33, and a three-jaw chuck driving component 34. The three-jaw chuck driving component 34 is mounted on the platform 2. The three-jaw chuck 33 is mounted on the three-jaw chuck driving component 34 and is used to fix the copper base 13. The three-jaw chuck driving component 34 drives the three-jaw chuck 33 to rotate, thereby driving the copper base 13 to rotate. The fixed base 31 is located above the three-jaw chuck 33. The fixed base positioning component 32 is mounted on the platform 2. The fixed base 31 is mounted on the fixed base positioning component 32. The fixed base positioning component 32 drives the fixed base 31 to descend and presses the copper tube 12 on the fixed base 31 onto the copper base 13.

[0023] Reference Figure 2As shown, the three-jaw chuck drive assembly 34 includes a drive gear 341, a gear rotation drive device 342, a driven gear 343, and a three-jaw chuck mounting plate 344. The three-jaw chuck mounting plate 344 and the gear rotation drive device 342 are respectively mounted on the top and bottom surfaces of the platform 2. The drive gear 341 is rotatably connected to both the three-jaw chuck mounting plate 344 and the platform 2, and is positioned above the gear rotation drive device 342. The drive gear 341 is fixedly connected to the output end of the gear rotation drive device 342. The driven gear 343 is rotatably connected to both the three-jaw chuck mounting plate 344 and the platform 2. The three-jaw chuck 33 is fixedly mounted on the top of the driven gear 343 and is used to fix the copper base 13. The drive gear 341 and the driven gear 343 mesh and transmit power. The three-jaw chuck 33 is a commonly used component in mechanical design, and its specific structure and working principle are common knowledge, so they will not be explained in detail here.

[0024] By adopting the above technical solution, due to the meshing transmission between the driving gear 341 and the driven gear 343, the gear rotation drive device 342 drives the driving gear 341 to rotate, which in turn drives the driven gear 343 to rotate. The driven gear 343 drives the three-jaw chuck 33 to rotate, which in turn drives the copper seat 13 fixed on the three-jaw chuck 33 to rotate. The same shaft end of the driving gear 341 and the driven gear 343 rotates on the plate 2. The three-jaw chuck mounting plate 344 supports and limits the other shaft end of the driving gear 341 and the driven gear 343, so that the driving gear 341 and the driven gear 343 rotate smoothly. Thus, the three-jaw chuck 33 and the copper seat 13 rotate smoothly, so as to cooperate with the argon arc welding mechanism 4 or the brazing mechanism 5 to perform circular trajectory welding at the splice of the copper seat 13 and the copper tube 12, ensuring the splicing accuracy of the copper seat 13 and the copper tube 12 and ensuring the continuity of the weld points of the copper seat 13 and the copper tube 12.

[0025] In this embodiment, the gear rotation drive device 342 is preferably configured as a motor.

[0026] Reference Figure 2As shown, the fixed seat positioning assembly 32 includes a first positioning column 321, a first positioning rod 322, a positioning mounting plate 323, a fixed seat lifting drive device 324, a connecting plate 325, a guide rod 326, and a guide sleeve 327. The first positioning column 321 is mounted on the platform 2. One end of the first positioning rod 322 is connected to the first positioning column 321. The positioning mounting plate 323 is fixedly mounted on the other end of the first positioning rod 322. The fixed seat lifting drive device 324 is mounted on the positioning mounting plate 325. On the mounting plate 323, the connecting plate 325 is located below the fixed seat lifting drive device 324, and the connecting plate 325 is connected and installed to the output end of the fixed seat lifting drive device 324. The fixed seat 31 is installed on the bottom surface of the connecting plate 325 and is used to fix the copper tube 12. The guide rod 326 moves longitudinally through the positioning mounting plate 323, and the lower end of the guide rod 326 is fixedly connected to the connecting plate 325. The guide sleeve 327 is installed on the positioning mounting plate 323 and is movably sleeved on the guide rod 326.

[0027] By adopting the above technical solution, the upper end of the copper tube 12 is inserted into the hole on the bottom surface of the fixing seat 31 to fix and limit the upper end of the copper tube 12. The fixing seat lifting drive device 324 drives the connecting plate 325, the fixing seat 31 and the copper tube 12 to descend and press the copper tube 12 tightly onto the upper surface of the copper seat 13. Since the lower end of the guide rod 326 is fixedly connected to the connecting plate 325, the guide sleeve 327 guides the lifting and sliding of the guide rod 326, thereby guiding the lifting and moving of the fixing seat 31. This ensures that the copper tube 12 in the fixing seat 31 moves up and down in a straight line, so as to ensure that the bottom surface of the copper tube 12 can be accurately spliced ​​with the top surface of the copper seat 13, thereby ensuring the accuracy of the welding positioning at the joint between the copper tube 12 and the copper seat 13.

[0028] In this embodiment, the fixed seat lifting drive device 324 is preferably configured as a cylinder.

[0029] Reference Figure 3As shown, the argon arc welding mechanism 4 includes an argon arc welding base 40, a first linear guide rail 41, a first slider 42, a first drive mounting plate 43, an argon arc welding gun moving device 44, an angle adjustment seat 45, a mounting clamp 46, an argon arc welding gun 47, a first wire feeder 48, and a first wire feed tube 49. The argon arc welding base 40 is mounted on the platform 2, the first linear guide rail 41 is fixedly mounted on the argon arc welding base 40, the first slider 42 is slidably mounted on the first linear guide rail 41, and the angle adjustment seat 45 is fixedly mounted on the platform 2. The mounting clip 46 is rotatably mounted on the angle adjustment seat 45 and is mounted on the first slider 42. The argon arc welding gun 47 is mounted on the mounting clip 46 and is used for argon arc welding of copper tubes and copper seats. The first wire feeding tube 49 is fixed on the mounting clip 46 through the first wire feeding seat 48. The first drive mounting plate 43 is mounted on one end of the first linear guide rail 41. The argon arc welding gun moving device 44 is mounted on the first drive mounting plate 43 and the output end of the argon arc welding gun moving device 44 is connected and installed to the first slider 42.

[0030] Reference Figure 2 and Figure 3 As shown, by adopting the above technical solution, the mounting clip 46 on the rotation angle adjustment seat 45 can adjust the angle of the mounting clip 46, thereby adjusting the angle of the argon arc welding gun 47 and the first wire feeding tube 49. The argon arc welding gun moving device 44 drives the first slider 42 to move towards the positioning mechanism 3, thereby moving the argon arc welding gun 47 and the first wire feeding tube 49 to the splice of the copper seat 13 and the copper tube 12, so as to realize the automated positioning of the argon arc welding gun 47 and the first wire feeding tube 49 before welding, making the welding tool positioning accurate, and ensuring that the weld point size of each argon arc welding is consistent, resulting in a good argon arc welding effect.

[0031] In this embodiment, the argon arc welding torch moving device 44 is preferably configured as a cylinder.

[0032] Reference Figure 4 As shown, the brazing mechanism 5 includes a brazing base 50, a second linear guide rail 51, a second slider 52, a second positioning column 53, a second positioning rod 54, a brazing gun 55, a second wire feeder 56, a second wire feed tube 57, a second drive mounting plate 58, and a brazing gun moving device 59. The brazing base 50 is mounted on the platform 2, the second linear guide rail 51 is mounted on the brazing base 50, the second slider 52 is slidably mounted on the second linear guide rail 51, and the second positioning column 53 is mounted on the second slider 55. On the top surface of 2, one end of the second positioning rod 54 is connected and installed to the second positioning column 53. The brazing gun 55 is rotatably mounted on the other end of the first positioning rod 322. The second wire feeder 56 is mounted on the brazing gun 55. The second wire feed tube 57 is mounted on the second wire feeder 56. The second drive mounting plate 58 is mounted on one end of the second linear guide rail 51. The brazing gun moving device 59 is mounted on the second drive mounting plate 58, and the output end of the brazing gun moving device 59 is connected and installed to the second slider 52.

[0033] Reference Figure 2 and Figure 4 As shown, by adopting the above technical solution, adjusting the position of the second positioning rod 54 on the second positioning column 53 and adjusting the angle of the brazing torch 55 on the second positioning rod 54, the angles of the brazing torch 55 and the second wire feed tube 57 can be adjusted. When the brazing torch moving device 59 drives the second slider 52 to move towards the positioning mechanism 3, it can move the brazing torch 55 and the second wire feed tube 57 to the splice of the copper seat 13 and the copper tube 12, realizing automated positioning of the brazing torch 55 and the second wire feed tube 57 before welding, ensuring accurate positioning of the welding tools, and ensuring that the size of the weld point is consistent for each brazing, resulting in good brazing effect. The brazing torch moving device 59 is preferably configured as a cylinder.

[0034] In this embodiment, both the argon arc welding wire feeding device 9 and the brazing wire feeding device 11 include a wire feeding roller, a wire pressing roller, a wire guide tube, and a wire feeding motor. The wire feeding roller is mounted on the output end of the wire feeding motor, and the wire pressing roller is located above the wire feeding roller and is used to press the first type of wire or the second type of wire onto the wire feeding roller. When the wire feeding motor drives the wire feeding roller to rotate, it drives the first type of wire or the second type of wire to be conveyed between the wire feeding roller and the wire pressing roller. The wire guide tube and the end of the first wire feeding tube 49 away from the argon arc welding gun 47 or the end of the second wire feeding tube 57 away from the brazing gun 55 are arranged in a straight line, and the wire guide tube is located on one side between the wire feeding roller and the wire pressing roller. The end of the first wire feeding tube 49 away from the argon arc welding gun 47 or the end of the second wire feeding tube 57 away from the brazing gun 55 is located on the other side between the wire feeding roller and the wire pressing roller. When the first wire feeding tube 49 or the second wire feeding tube 57 is conducted through the wire guide tube and enters between the wire feeding roller and the wire pressing roller, the wire feeding motor of the argon arc welding wire feeding device 9 drives the wire feeding roller to rotate, so that the first type of wire passes through the first wire feeding tube 49 and is fed towards the argon arc welding gun 47 to supply the first type of wire to the argon arc welding gun 47. The wire feeding motor of the brazing wire feeding device 11 drives the wire feeding roller to rotate, so that the second type of wire passes through the second wire feeding tube 57 and is fed towards the brazing gun 55 to supply the second type of wire to the brazing gun 55. There are one or more wire feeding rollers and wire pressing rollers respectively, with two adjacent wire feeding rollers arranged in a straight line and two adjacent wire pressing rollers arranged in a straight line.

[0035] Its overall structural design allows for the selection of either argon arc welding or brazing at the joint of two workpieces (copper tube and copper base) on the same equipment, without the need for different welding platforms. This achieves high versatility, and the weld points of the finished workpieces produced using this method are consistently sized and connected. This ensures welding quality while significantly reducing the configuration cost of welding equipment and the welding processing cost. It not only solves the problems of traditional welding platforms that use a single welding tool to weld copper tubes and copper bases, resulting in limited welding processing and poor versatility, but also addresses the issues of high welding equipment configuration costs and high welding processing costs associated with the traditional method of requiring different welding platforms to weld two workpieces with different joint gaps.

[0036] The above embodiments are merely examples of this utility model and are not intended to limit the implementation and scope of this utility model. All technical solutions that are the same as or equivalent to the contents described in the claims of this utility model should be included within the protection scope of this utility model.

Claims

1. A welding machine for different splicing gaps, comprising a frame, wherein a plate is mounted in the middle of the frame, characterized in that: The platform is equipped with a positioning mechanism for fixing copper tubes and copper seats. An argon arc welding mechanism is also installed on the platform, located on one side of the positioning mechanism and used for argon arc welding of the copper tubes and copper seats. A brazing mechanism is also installed on the platform, located on the other side of the positioning mechanism and used for brazing the copper tubes and copper seats. A vision camera for monitoring welding quality is installed on the platform. An argon arc welding wire feeder is installed on the top of the frame, with a first wire feeder for supplying a first type of wire and an argon arc welding wire feeder for conveying the first type of wire. A brazing wire feeder is installed on the frame, with a second wire feeder for supplying a second type of wire and a brazing wire feeder for conveying the second type of wire.

2. The welding machine for different splicing gaps according to claim 1, characterized in that: The positioning mechanism includes a fixed base, a fixed base positioning assembly, a three-jaw chuck, and a three-jaw chuck driving assembly. The three-jaw chuck driving assembly is mounted on the platform, and the three-jaw chuck is mounted on the three-jaw chuck driving assembly and used to fix the copper base. The three-jaw chuck driving assembly drives the three-jaw chuck to rotate, thereby causing the copper base to rotate. The fixed base is located above the three-jaw chuck, and the fixed base positioning assembly is mounted on the platform. The fixed base is mounted on the fixed base positioning assembly, and the fixed base positioning assembly drives the fixed base to descend and press the copper tube on the fixed base onto the copper base.

3. A welding machine for different splicing gaps according to claim 2, characterized in that: The three-jaw chuck drive assembly includes a drive gear, a gear rotation drive device, a driven gear, and a three-jaw chuck mounting plate. The three-jaw chuck mounting plate and the gear rotation drive device are respectively mounted on the top and bottom surfaces of the platform. The drive gear is rotatably connected to the three-jaw chuck mounting plate and the platform, and is located above the gear rotation drive device. The drive gear is fixedly connected to the output end of the gear rotation drive device. The driven gear is rotatably connected to the three-jaw chuck mounting plate and the platform. The three-jaw chuck is fixedly mounted on the top of the driven gear and is used to fix the copper base. The drive gear and the driven gear mesh and drive each other.

4. A welding machine for different splicing gaps according to claim 2, characterized in that: The fixed seat positioning assembly includes a first positioning column, a first positioning rod, a positioning mounting plate, a fixed seat lifting drive device, a connecting plate, a guide rod, and a guide sleeve. The first positioning column is mounted on the platform. One end of the first positioning rod is connected to the first positioning column. The positioning mounting plate is fixedly mounted on the other end of the first positioning rod. The fixed seat lifting drive device is mounted on the positioning mounting plate. The connecting plate is located below the fixed seat lifting drive device and is connected to the output end of the fixed seat lifting drive device. The fixed seat is mounted on the bottom surface of the connecting plate and is used to fix the copper tube. The guide rod moves longitudinally through the positioning mounting plate, and the lower end of the guide rod is fixedly connected to the connecting plate. The guide sleeve is mounted on the positioning mounting plate and is movably sleeved on the guide rod.

5. A welding machine for different splicing gaps according to claim 1, characterized in that: The argon arc welding mechanism includes an argon arc welding base, a first linear guide rail, a first slider, a first drive mounting plate, an argon arc welding gun moving device, an angle adjustment seat, a mounting clamp, an argon arc welding gun, a first wire feeder, and a first wire feed tube. The argon arc welding base is mounted on a platform. The first linear guide rail is fixedly mounted on the argon arc welding base. The first slider is slidably mounted on the first linear guide rail. The angle adjustment seat is fixedly mounted on the first slider. The mounting clamp is rotatably mounted on the angle adjustment seat. The argon arc welding gun is mounted on the mounting clamp and is used for argon arc welding of copper tubes and copper bases. The first wire feed tube is fixed to the mounting clamp via the first wire feeder. The first drive mounting plate is mounted on one end of the first linear guide rail. The argon arc welding gun moving device is mounted on the first drive mounting plate, and the output end of the argon arc welding gun moving device is connected to the first slider.

6. A welding machine for different splicing gaps according to claim 1, characterized in that: The brazing mechanism includes a brazing base, a second linear guide rail, a second slider, a second positioning column, a second positioning rod, a brazing gun, a second wire feeder, a second wire feed tube, a second drive mounting plate, and a brazing gun moving device. The brazing base is mounted on the platform, the second linear guide rail is mounted on the brazing base, the second slider is slidably mounted on the second linear guide rail, the second positioning column is mounted on the top surface of the second slider, one end of the second positioning rod is connected to the second positioning column, the brazing gun is rotatably mounted on the other end of the first positioning rod, the second wire feeder is mounted on the brazing gun, the second wire feed tube is mounted on the second wire feeder, the second drive mounting plate is mounted on one end of the second linear guide rail, and the brazing gun moving device is mounted on the second drive mounting plate, with the output end of the brazing gun moving device connected to the second slider.

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