Welding process for carbon dioxide medical incubator

Abstract

The application discloses a carbon dioxide medical incubator welding process and relates to the technical field of electric arc welding.The welding process is based on argon arc welding equipment, which adopts detachable opposite-side straight seam welding tooling, cooperates with inner support columns and outer support columns, sufficiently supports the inner and outer portions of a first workpiece, limits the end portions of the first workpiece through two support seats, cooperates with vacuum adsorption positioning, realizes sufficient and stable positioning of multiple mutually spliced workpieces, so as to guarantee the welding quality of the barrel body structure; the barrel body is embedded into a barrel body positioning seat in the girth seam welding tooling and is sufficiently supported and positioned by a third support column, the bottom cover is sufficiently adsorbed and positioned, after the butt joint of the two workpieces, a limiting mechanism abuts against the butt joint of the two workpieces, the position deviation of the two workpieces is further corrected, the second weld seam is uniformly distributed and accurately positioned, and then the welding torch on the positioning seat is rotated to cooperate with the welding manipulator, so that high-quality girth seam welding processing is realized, the weld seam forming quality is high, and the workpiece layout and blanking are convenient.

Description

Technical Field

[0001] This invention relates to the field of arc welding technology, specifically a welding process for a carbon dioxide medical incubator. Background Technology

[0002] The manufacturing process of a carbon dioxide medical incubator generally includes: first, bending and shaping the sheet metal into straight, L-shaped, or U-shaped plates; then, assembling the plates and fixing them using methods such as argon arc welding (straight seam welding) to form the barrel structure, which is then joined with the bottom cover; finally, circumferential welding is performed to complete the finished product. The above-mentioned straight seam welding and circumferential welding operations have high requirements. Due to the continuous introduction of carbon dioxide and pure water mist into the stainless steel barrel of the incubator (creating a high-humidity environment), the combination of water and carbon dioxide to form carbonic acid (forming a weakly acidic environment), the small size of the barrel making robotic welding inside difficult (requiring welding only from the outside), and other limitations, the weld seams on the exterior surface cannot be ground or repaired, and must be free of any defects such as slag inclusions, porosity, or incomplete fusion. Therefore, the welding difficulty is further increased. Existing manual and automated arc welding processes are insufficient to meet the requirements for workpiece positioning accuracy, weld formation quality, and ease of workpiece placement and removal during straight seam welding and circumferential welding operations. Summary of the Invention

[0003] The purpose of this invention is to provide a welding process for carbon dioxide medical incubators in order to overcome the deficiencies of the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a welding process for a carbon dioxide medical incubator. This welding process is applied to an argon arc welding device, which includes a first base and a straight seam welding fixture, a circumferential seam welding fixture, and a welding robot mounted on the first base. The straight seam welding fixture includes an inner support base and an outer support base. At least two first support columns are circumferentially spaced on the inner support base, and a second support column is mounted on the outer support base outside the first support columns. Gaps are formed between the first support columns and the second support columns, as well as between adjacent second support columns. The second support columns are detachable. The circumferential welding fixture includes a barrel positioning seat and a bottom cover positioning seat. The barrel positioning seat rotatably connects to a first bracket, and a first opening is provided at the end facing the bottom cover positioning seat. Several third support columns are arranged at intervals around the inner circumference of the first opening. A limiting mechanism is provided on the outer side of the first opening of the barrel positioning seat. The first bracket is driven to slide on the first base by a linear drive device. A second base is provided on the first base. The bottom cover positioning seat connects to the output end of the servo motor on the second base, and an adsorption mechanism is provided on it. A welding torch is provided at the end of the welding robot. The welding process includes the following steps:

[0005] S1. Straight seam welding: The first workpiece is fitted and positioned on the first support column so that the ends are joined to form the first weld. The second support column abuts against the outer surface of the first workpiece and is assembled and positioned on the inner support seat to complete the positioning of the first workpiece. The welding robot moves the welding gun from the gap between the adjacent second support columns to the surface of the first workpiece and welds the first weld.

[0006] S2. Barrel unloading: Remove the outer support base and remove the barrel formed by welding the first workpiece;

[0007] S3, Circumferential Seam Welding: Press the barrel into the first opening and fit it onto the third support column. The limiting mechanism positions the barrel. The second workpiece is adsorbed and positioned on the bottom cover positioning seat by the adsorption mechanism. The linear drive equipment runs, and the barrel positioning seat moves toward the bottom cover positioning seat, so that the second workpiece and the first workpiece are connected to form the second weld. The servo motor on the second base drives the bottom cover positioning seat and the barrel positioning seat to rotate. The second weld is welded by the welding gun.

[0008] S4. Finished product unloading: The adsorption mechanism releases adsorption, the linear drive equipment runs, the barrel positioning seat separates from the bottom cover positioning seat, the limit mechanism resets, and finally, the finished product formed by the circumferential weld is taken out.

[0009] As a further description of the above technical solution:

[0010] The first workpiece includes several interlocking plates. The joints of the plates form a first weld at least on both sides of the barrel. The first base is also provided with a third base. The second support is located on the third base and is rotatably connected to the inner support seat through the first bearing seat.

[0011] As a further description of the above technical solution:

[0012] The second support column is inserted into the socket of the inner support seat and positioned by magnetic attraction of the magnet. The outer end of the first support column is connected to the limiting plate, the side of the limiting plate abuts against the inner wall of the first workpiece, and it passes through the second opening of the outer support seat. The outer side of the second opening of the outer support seat and the inner support seat abut against the two end faces of the first workpiece, respectively.

[0013] As a further description of the above technical solution:

[0014] The third base has a guide seat below the outer support seat. The guide seat has a guide wheel and an arc-shaped notch. The guide wheel abuts against the side of the disc-shaped outer support seat, and the outer support seat slides into the arc-shaped notch.

[0015] As a further description of the above technical solution:

[0016] Vacuum suction ports are provided on the opposite surfaces of the first and second support columns and on the outer surface of the third support column. The inner support seat, outer support seat, and barrel positioning seat are provided with connectors that communicate with the corresponding vacuum suction ports. The connectors are connected to the external vacuum generator through flexible hoses.

[0017] As a further description of the above technical solution:

[0018] The first base is also provided with a guide rail that slides and docks with the slide at the bottom of the first bracket. The linear drive device is located on the fourth base of the first base, and its output end docks with the connecting seat of the first bracket. The first bracket rotates and docks with the positioning seat of the barrel through the second bearing seat.

[0019] As a further description of the above technical solution:

[0020] The barrel positioning seat includes a back plate, a positioning plate, and several connecting columns connecting the back plate and the positioning plate. A third support column is set on the back plate, and a stop block is set at its inner end. A first opening and a limiting mechanism are set on the positioning plate. The limiting mechanism includes several linear modules and a limiting cylinder. The abutting slider driven on the linear module abuts against the concave platform surface of the first workpiece. The pressure block at the output end of the limiting cylinder abuts against the surface of the first workpiece, which corresponds to the side of the second weld.

[0021] As a further description of the above technical solution:

[0022] The second workpiece has an axially extending flange that engages with the edge of the bottom cover positioning seat. The adsorption mechanism includes several vacuum suction cups, which are connected to an external vacuum generator via connectors and hoses on the bottom cover positioning seat.

[0023] As a further description of the above technical solution:

[0024] The welding robot is a six-axis articulated robot.

[0025] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0026] The welding process of this invention is based on an argon arc welding device. This device uses a detachable straight seam welding fixture to achieve convenient straight seam welding of the barrel structure. Specifically, an inner support column and an outer support column are used to support the first workpiece from the inside and to clamp it from the outside, ensuring that the butt joint surfaces of the plates are flush. The inner and outer support seats limit the ends of the first workpiece, and with the help of vacuum adsorption positioning, multiple interconnected workpieces are fully and stably positioned to ensure the welding quality of the barrel structure. During the process, the outer support column is assembled and connected to the inner support seat to achieve tooling shaping. After welding, the two are separated, the outer support seat is removed, and the formed barrel can be taken out. The workpiece is fully positioned. The process is fast and the welding quality is stable. The circumferential welding fixture positions the barrel and bottom cover respectively through barrel positioning seats and bottom cover positioning seats. The barrel is embedded in the barrel positioning seat and fully supported and positioned by the third support column. The limiting mechanism abuts and limits the outer end of the barrel. The bottom cover is fully positioned by adsorption. Then, the two are driven to approach and dock. The limiting mechanism abuts at the docking point of the two workpieces to further correct the position of the two workpieces, so that the second weld is evenly distributed and accurately positioned. Afterwards, by rotating the two positioning seats, the welding robot can flexibly and accurately adjust the position of the welding gun to achieve high-quality circumferential welding, high docking accuracy, small welding deformation, realize automated welding, and high weld quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a flowchart of a welding process for a carbon dioxide medical incubator.

[0029] Figure 2 A schematic diagram of the structure of an argon arc welding device corresponding to a carbon dioxide medical incubator welding process. Figure 1 .

[0030] Figure 3 A schematic diagram of the structure of an argon arc welding device corresponding to a carbon dioxide medical incubator welding process. Figure 2 .

[0031] Figure 4 A schematic diagram of the structure of an argon arc welding device corresponding to a carbon dioxide medical incubator welding process. Figure 3 .

[0032] Figure 5 This is a schematic diagram of the barrel positioning seat in an argon arc welding device corresponding to a carbon dioxide medical incubator welding process.

[0033] Figure 6 This is a schematic diagram of the finished carbon dioxide medical incubator product corresponding to a welding process for a carbon dioxide medical incubator.

[0034] Legend:

[0035] 1-First base; 2-Straight seam welding fixture; 3-Circumferential seam welding fixture; 4-Welding robot; 5-Inner support seat; 6-Outer support seat; 7-First support column; 8-Second support column; 9-Barrel body positioning seat; 10-Bottom cover positioning seat; 11-First bracket; 12-First opening; 13-Third support column; 14-Second base; 15-Third base; 16-Second bracket; 17-First bearing seat; 18-Limiting plate; 19-Second opening; 20-Guide 21-Guide wheel; 22-Arc-shaped notch; 23-Guide rail; 24-Fourth base; 25-Connecting seat; 26-Second bearing seat; 27-Back plate; 28-Positioning plate; 29-Connecting column; 30-Stop block; 31-Linear module; 32-Limiting cylinder; 33-Abutting slider; 34-Vacuum suction cup; 100-First workpiece; 110-First weld; 120-Concave platform; 200-Second workpiece; 210-Second weld; 220-Flange. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Example 1:

[0042] Please see Figure 1-6 This invention provides a technical solution: a welding process for a carbon dioxide medical incubator. This welding process is applied to an argon arc welding device, which includes a first base 1 and a straight seam welding fixture 2, a circumferential seam welding fixture 3, and a welding robot 4 disposed on the first base 1. The straight seam welding fixture 2 includes an inner support seat 5 and an outer support seat 6. The inner support seat 5 is circumferentially spaced with at least two first support columns 7. The outer support seat 6 is provided with a second support column 8 outside the first support columns 7. Gaps are formed between the first support columns 7 and the second support columns 8, and between adjacent second support columns 8. The second support columns 8 are detachably connected to the inner support seat 5. The circumferential seam welding fixture 3 includes a barrel positioning seat 9 and a bottom cover positioning seat. 10. The barrel positioning seat 9 rotates and connects to the first bracket 11. A first opening 12 is provided at one end of the barrel positioning seat 9 facing the bottom cover positioning seat 10. Several third support columns 13 are spaced apart circumferentially within the first opening 12. A limiting mechanism is provided on the outside of the first opening 12 of the barrel positioning seat 9. The first bracket 11 is slidably mounted on the first base 1 by a linear drive device, which can be a conventional drive device such as an electric cylinder, pneumatic cylinder, or hydraulic cylinder. A second base 14 is provided on the first base 1. The bottom cover positioning seat 10 connects to the output end of a servo motor on the second base 14, and an adsorption mechanism is provided on it. A welding torch is provided at the end of the welding robot 4. The welding process includes the following steps:

[0043] S1. Straight seam welding: The first workpiece 100 is set and positioned on the first support column 7 so that the ends are joined together to form the first weld 110. The second support column 8 abuts against the outer surface of the first workpiece 100 and is assembled and positioned on the inner support seat 5 to complete the positioning of the first workpiece 100. The welding robot 4 moves the welding gun from the gap between the adjacent second support columns 8 to the surface of the first workpiece 100 and welds the first weld 110.

[0044] S2. Barrel unloading: Remove the outer support 6 and remove the barrel formed by welding the first workpiece 100;

[0045] S3, Circumferential weld: The barrel body is pressed into the first opening 12 and fitted onto the third support column 13. The limiting mechanism positions the barrel body. The second workpiece 200 is adsorbed and positioned on the bottom cover positioning seat 10 by the adsorption mechanism. The linear drive device operates, and the barrel body positioning seat 9 moves toward the bottom cover positioning seat 10, so that the second workpiece 200 and the first workpiece 100 are connected to form a second weld 210. The servo motor on the second base 14 drives the bottom cover positioning seat 10 and the barrel body positioning seat 9 to rotate. The welding gun is used to weld the second weld 210.

[0046] S4. Finished product unloading: The adsorption mechanism releases adsorption, the linear drive device operates, the barrel positioning seat 9 separates from the bottom cover positioning seat 10, the limiting mechanism resets, and finally, the finished product formed by the circumferential weld is taken out.

[0047] This product is a stainless steel tank for a carbon dioxide medical incubator, continuously circulated with carbon dioxide and purified water mist (in a high-humidity environment). Water and carbon dioxide combine to form carbonic acid (a weak acid). The inner side of the tank is the outer surface. The welds must not be ground or repaired; there must be no slag inclusions, porosity, incomplete fusion, or any other defects. Furthermore, the tank's small size makes robotic welding inside inconvenient; therefore, welding can only be performed from the outside. Thus, an argon arc welding process with single-sided welding and double-sided forming is employed. That is, welding is done on the outside of the tank, while the inner weld forms the outer surface.

[0048] To meet the requirements for surface penetration welds, extremely high demands are placed on the tooling and welding process: Dimensional consistency of sub-components must be maintained—dimensional accuracy <0.05, flatness <0.05; contact gap consistency of sub-component joints must be <0.1. Extremely high requirements are also placed on the welding tooling: the robot and tooling positioning mechanism must coordinate their movements, and the linear and arc motion speeds must be consistent. Based on the above welding process and equipment design, the above arc welding processing requirements and product forming standards can be met.

[0049] Specifically, the second support column 8 is inserted into the socket of the inner support seat 5 and positioned by magnetic attraction. The outer end of the first support column 7 is connected to the limiting plate 18, the side of the limiting plate 18 abuts against the inner wall of the first workpiece 100, and it passes through the second opening 19 of the outer support seat 6. The outer side of the second opening 19 of the outer support seat 6 and the inner support seat 5 abut against the two end faces of the first workpiece 100, respectively. Vacuum suction ports are provided on the opposite surfaces of the first support column 7 and the second support column 8, and on the outer side of the third support column 13. The inner support seat 5, the outer support seat 6, and the barrel positioning seat 9 are provided with connectors that communicate with the corresponding vacuum suction ports. The connectors are connected to an external vacuum generator through a flexible hose. By using an insertion-type assembly combined with magnetic positioning, the ease of assembly and disassembly can be improved, and the positioning is sufficient. The first support column 7 and the second support column 8 support the inner and outer surfaces of the workpiece, respectively. The inner support seat 5 and the outer support seat 6 abut against the two ends of the workpiece, thereby completing the initial positioning. Then, the workpiece is attracted by the vacuum suction ports, thereby ensuring stable positioning. When placing the workpiece, it is necessary to ensure the gap between the first weld and the adjacent second support column 8, and the alignment of the corresponding first support column 7. For minor deviations in position, the workpiece position can be identified by visual recognition equipment such as the onboard industrial camera on the welding robot 4. Then, the welding torch is controlled to be aligned with the weld of the workpiece a second time to ensure alignment accuracy and improve welding quality. In the field of automated arc welding, visual recognition equipment to assist the alignment of the welding torch and the workpiece is a common application, which will not be elaborated here.

[0050] The first base 1 is also provided with a guide rail 23 that slides and engages with the slide at the bottom of the first bracket 11. The linear drive device is mounted on the fourth base 24 of the first base 1, and its output end is connected to the connecting seat 25 of the first bracket 11. The first bracket 11 is rotatably connected to the barrel positioning seat 9 via the second bearing seat 26. This improves the movement stability of the first bracket 11 and its components, and also makes the rotation of the barrel positioning seat 9 on the first bracket 11 smoother and more stable.

[0051] The welding robot 4 is a six-axis articulated robot, which adopts existing products, thereby making the position adjustment of the welding torch more flexible and meeting the requirements of high-precision straight seam welding and circumferential seam welding arc welding.

[0052] This welding process is based on argon arc welding equipment. This equipment uses a detachable straight seam welding fixture to achieve convenient straight seam welding of the barrel structure. Specifically, it employs an inner support column and an outer support column to support the first workpiece from the inside and to clamp it from the outside, ensuring that the butt joint ends of the plates are flush. The inner and outer support seats limit the ends of the first workpiece, and with the help of vacuum adsorption positioning, it achieves sufficient and stable positioning of multiple interconnected workpieces, thus ensuring the welding quality of the barrel structure. During the process, the outer support column is assembled and connected to the inner support seat to achieve fixture shaping. After welding, the two are separated, the outer support seat is removed, and the formed barrel can be taken out. The workpiece is well positioned and ready for unloading. The process is fast and produces stable welding quality. The circumferential welding fixture positions the barrel and bottom cover respectively using barrel positioning seats and bottom cover positioning seats. The barrel is embedded in the barrel positioning seat and fully supported and positioned by the third support column. The limiting mechanism abuts and limits the outer end of the barrel. The bottom cover is fully positioned by adsorption. Then, the two are driven to approach and dock. The limiting mechanism abuts at the docking point of the two workpieces to further correct the position of the two workpieces, so that the second weld is evenly distributed and accurately positioned. Afterwards, by rotating the two positioning seats, the welding robot can flexibly and accurately adjust the position of the welding gun to achieve high-quality circumferential welding, high docking accuracy, small welding deformation, realize automated welding, and high weld quality.

[0053] Example 2:

[0054] Please see Figure 2-4 Figure 6 illustrates a welding process for a carbon dioxide medical incubator according to Embodiment 2 of the present invention. This embodiment further improves upon the above embodiments by providing the following technical solutions: The first workpiece 100 includes several interlocking plates. The joints of the plates form the first weld seam 110 on at least two sides of the barrel body. The first base 1 is also provided with a third base 15, and a second support 16 is disposed on the third base 15, which rotatably connects to the inner support base 5 via a first bearing seat 17. Through the rotation drive design, multiple first weld seam positions can be switched and adjusted to achieve continuous multiple straight seam welding processes, thereby improving welding efficiency.

[0055] The third base 15 is provided with a guide seat 20 below the outer support seat 6. The guide seat 20 is provided with a guide wheel 21 and an arc-shaped recess 22. The guide wheel 21 abuts against the side of the disc-shaped outer support seat 6, and the outer support seat 6 slides into the arc-shaped recess 22. This realizes the rotational guidance and support of the outer support seat 6, making the switching of multiple welding positions more stable and faster, with small workpiece positional deviation and improved welding accuracy.

[0056] Example 3:

[0057] Please see Figure 2-6The figure shows a welding process for a carbon dioxide medical incubator provided in Embodiment 3 of the present invention. Based on the above embodiments, the following improved technical solutions are made: The barrel positioning seat 9 includes a back plate 27, a positioning plate 28, and a plurality of connecting columns 29 connecting the back plate 27 and the positioning plate 28. The third support column 13 is provided on the back plate 27, and a stop block 30 is provided at its inner end. The first opening 12 and the limiting mechanism are provided on the positioning plate 28. The limiting mechanism includes a plurality of linear modules 31 and a limiting cylinder 32. The abutting slider 33 driven on the linear module 31 abuts against the surface of the concave platform 120 of the first workpiece 100. The pressure block at the output end of the limiting cylinder 32 abuts against the surface of the first workpiece 100, which corresponds to the side of the second weld 210. Based on the initial support and positioning of the barrel body by the third support column 13, the abutting slider 33 abuts against the concave platform 120 of the first workpiece 100 to achieve axial limiting, thereby avoiding barrel deformation and ensuring sufficient positioning with high precision. After the barrel body is connected to the bottom cover, the limiting cylinder 32 drives the pressure block to abut against the outer surface of the barrel body and the outer side of the second weld for a second time, correcting its radial position and making its position with the bottom cover more accurate. The second weld is evenly distributed on each side to ensure the forming quality of the annular weld.

[0058] The second workpiece 200 has a flange 220 extending axially from its edge. The flange 220 engages with the edge of the bottom cover positioning seat 10. The adsorption mechanism includes several vacuum suction cups 34, which are connected to an external vacuum generator via connectors and hoses on the bottom cover positioning seat 10. Based on the flange 220 of the incubator bottom cover, by fastening it to the bottom cover positioning seat 10 and adsorbing it for positioning, coaxial alignment with the tank body can be achieved, making alignment more convenient and accurate, and avoiding lateral displacement that could affect the workpiece docking accuracy and welding quality.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding process for a carbon dioxide medical incubator, characterized in that, The welding process is applied to an argon arc welding equipment, which includes a first base and a straight seam welding fixture, a circumferential seam welding fixture, and a welding robot mounted on the first base. The straight seam welding fixture includes an inner support base and an outer support base. The inner support base has at least two first support columns spaced circumferentially apart. The outer support base has a second support column positioned outside the first support columns. Gaps are formed between the first support columns and the second support columns, as well as between adjacent second support columns. The second support columns are detachably connected to the inner support base. The circumferential seam welding fixture includes a barrel positioning base and a bottom... A lid positioning seat is provided, wherein the barrel positioning seat is rotatably connected to a first bracket, and a first opening is provided at one end of the barrel positioning seat facing the bottom cover positioning seat. A plurality of third support columns are circumferentially spaced within the first opening. A limiting mechanism is provided on the outside of the first opening of the barrel positioning seat. The first bracket is slidably mounted on the first base via a linear drive device. A second base is provided on the first base. The bottom cover positioning seat is connected to the output end of a servo motor on the second base, and an adsorption mechanism is provided thereon. A welding torch is provided at the end of the welding robot. The welding process includes the following steps: S1. Straight seam welding: The first workpiece is positioned on the first support column and the ends are joined to form the first weld. The second support column abuts against the outer surface of the first workpiece and is assembled and positioned on the inner support seat to complete the positioning of the first workpiece. The welding robot moves the welding gun from the gap between the adjacent second support columns to the surface of the first workpiece and welds the first weld. S2. Barrel unloading: Remove the outer support base and remove the barrel formed by welding the first workpiece; S3, Circumferential Seam Welding: The barrel body is pressed into the first opening and fitted onto the third support column. The limiting mechanism positions the barrel body. The second workpiece is adsorbed and positioned on the bottom cover positioning seat by the adsorption mechanism. The linear drive device operates, and the barrel body positioning seat moves toward the bottom cover positioning seat, so that the second workpiece and the first workpiece are connected to form a second weld. The servo motor on the second base drives the bottom cover positioning seat and the barrel body positioning seat to rotate. The second weld is welded by the welding gun. S4. Finished product unloading: The adsorption mechanism releases adsorption, the linear drive device runs, the barrel positioning seat separates from the bottom cover positioning seat, the limiting mechanism resets, and finally, the finished product formed by the circumferential weld is taken out.

2. The welding process for a carbon dioxide medical incubator according to claim 1, characterized in that, The first workpiece includes several interlocking plates, and the joints of the plates form the first weld at least on both sides of the barrel. The first base is also provided with a third base, and a second bracket is provided on the third base, which is rotatably connected to the inner support base through a first bearing seat.

3. The welding process for a carbon dioxide medical incubator according to claim 2, characterized in that, The second support column is inserted into the socket of the inner support seat and positioned by magnetic attraction of a magnet. The outer end of the first support column is connected to the limiting plate. The side of the limiting plate abuts against the inner wall of the first workpiece and passes through the second opening of the outer support seat. The outer side of the second opening of the outer support seat and the inner support seat abut against the two end faces of the first workpiece, respectively.

4. The welding process for a carbon dioxide medical incubator according to claim 2, characterized in that, The third base is provided with a guide seat below the outer support seat. The guide seat is provided with a guide wheel and an arc-shaped notch. The guide wheel abuts against the side of the disc-shaped outer support seat, and the outer support seat slides into the arc-shaped notch.

5. The welding process for a carbon dioxide medical incubator according to claim 1, characterized in that, Vacuum suction ports are provided on the opposite surfaces of the first and second support columns and on the outer surface of the third support column. The inner support seat, outer support seat, and barrel positioning seat are provided with connectors that communicate with the corresponding vacuum suction ports. The connectors are connected to an external vacuum generator via flexible hoses.

6. The welding process for a carbon dioxide medical incubator according to claim 1, characterized in that, The first base is also provided with a guide rail that slides and engages with the slide at the bottom of the first bracket. The linear drive device is located on the fourth base of the first base, and its output end is connected to the connecting seat of the first bracket. The first bracket is rotatably connected to the barrel positioning seat through the second bearing seat.

7. The welding process for a carbon dioxide medical incubator according to claim 1, characterized in that, The barrel positioning seat includes a back plate, a positioning plate, and several connecting columns that connect the back plate and the positioning plate. The third support column is located on the back plate and has a stop block at its inner end. The first opening and limiting mechanism are located on the positioning plate. The limiting mechanism includes several linear modules and a limiting cylinder. The abutting slider driven on the linear module abuts against the concave platform surface of the first workpiece. The pressure block at the output end of the limiting cylinder abuts against the surface of the first workpiece, which corresponds to the side of the second weld.

8. The welding process for a carbon dioxide medical incubator according to claim 1, characterized in that, The second workpiece has an axially extending flange that engages with the edge of the bottom cover positioning seat. The adsorption mechanism includes several vacuum suction cups that connect to an external vacuum generator via a connector and hose of the bottom cover positioning seat.

9. The welding process for a carbon dioxide medical incubator according to claim 1, characterized in that, The welding robot is a six-axis articulated robot.

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