Welding argon filling device and manufacturing method thereof
By designing an L-shaped bent argon-filling pipe and setting radial exhaust holes on the second pipe body, the problem of airflow interference in traditional welding argon-filling devices was solved, achieving uniform and stable airflow in the welding area, and improving welding quality and equipment life.
Patent Information
- Application Number
- CN202511376672.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2025-12-16
AI Technical Summary
In traditional welding argon-filled devices, the argon gas flow and the welding torch gas flow are prone to interference or collision, leading to airflow turbulence, which affects the protection effect of the welding area and reduces the welding quality.
Design a welding argon purging device, which adopts an L-shaped bent argon purging pipe, and the second pipe body is provided with a radially penetrating exhaust hole to ensure that the argon gas flow diffuses radially to the welding area and reduces interference with the welding torch gas flow.
It improves the uniformity and stability of airflow in the welding area, reduces defects such as porosity and cracks, enhances the strength and appearance quality of the welded joint, and extends the service life of the equipment.
Smart Images
Figure CN121131944A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of argon arc welding technology, and in particular to a welding argon purging device and a method for manufacturing the welding argon purging device. Background Technology
[0002] In traditional welding processes, especially in argon arc welding, inert gases such as argon are needed for protection to prevent oxidation of the metal in the weld area. Argon has good chemical stability and can effectively isolate oxygen and moisture from the air, ensuring the quality of the weld metal. However, in actual welding operations, the protective gas flow inside the pipe is often interfered with by the external ambient airflow or the airflow from the welding equipment, thus affecting the protection effect.
[0003] Argon purging devices are primarily used in welding to provide a stable argon gas flow to the welding area, thereby preventing metal surface oxidation. However, the argon gas flow generated by traditional argon purging devices is prone to interference or collision with the welding torch gas flow, resulting in turbulent airflow. This airflow interference may cause the gas flow to fail to uniformly cover the welding area, thus affecting the quality of the weld. Summary of the Invention
[0004] The purpose of this application is to provide a welding argon purging device and a method for manufacturing the welding argon purging device, aiming to solve the technical problem of interference between the gas flow of the traditional welding argon purging device and the gas flow of the argon arc welding torch.
[0005] To achieve the above objectives, this application proposes a welding argon purging device, which includes:
[0006] A cutting torch and an oxygen connector, one end of which is connected to the cutting torch;
[0007] An argon-filling pipe is provided, one end of which is connected to the other end of the oxygen connector. The argon-filling pipe includes a first pipe body and a second pipe body that are integrally formed and bent in an L-shape. The end of the first pipe body opposite to the second pipe body is connected to the oxygen connector. The end of the second pipe body opposite to the first pipe body is closed. The second pipe body has an exhaust hole that extends radially through the second pipe body so that the argon gas in the argon-filling pipe flows towards the welding area and diffuses radially along the second pipe body.
[0008] In one embodiment, the number of exhaust holes is two, and the two exhaust holes are distributed at intervals along the axial direction of the second pipe body.
[0009] In one embodiment, the interval between the two exhaust holes is P, where 3mm ≤ P ≤ 5mm.
[0010] In one embodiment, the diameter of the vent hole is D, where 1.4 mm ≤ D ≤ 1.6 mm.
[0011] In one embodiment, the radius of curvature of the L-shaped bend is R, where R ≥ 5 mm.
[0012] In one embodiment, the thickness of the argon-filling pipe is t, where 2.6 mm ≤ t ≤ 2.9 mm.
[0013] In one embodiment, the argon-filling conduit is flat in shape;
[0014] And / or, the inner diameter of the argon filling pipe is d, 4mm≤d≤6mm;
[0015] And / or, the length of the argon-filling pipe is x, 140mm≤x≤160mm;
[0016] And / or, the argon-filling pipeline is made of stainless steel or a fast-oxygenating copper pipe from a scrap cutting torch.
[0017] Furthermore, to achieve the above objectives, this application also proposes a method for manufacturing a welding argon purging device, the method comprising:
[0018] The bent pipe forms the first pipe body and the second pipe body in an L-shape;
[0019] Seal the end of the second tube that is away from the first tube;
[0020] The exhaust hole is opened on the second pipe body;
[0021] Connect the end of the first tube that is away from the second tube to the oxygen connector.
[0022] In one embodiment, before bending the pipe, the method further includes:
[0023] Welding wire is threaded inside the pipe;
[0024] Tapping the pipe flattens it.
[0025] Pull out the welding wire from the pipe.
[0026] In one embodiment, before removing the welding wire from the pipe, the method further includes:
[0027] The flat surface of the pipe is ground on both sides;
[0028] Measure the thickness of the pipe.
[0029] The above-mentioned technical solution of this application has at least the following beneficial technical effects:
[0030] The technical solution of this application adopts a second pipe body with an exhaust hole that runs radially through the second pipe body. This allows the argon gas flow in the argon filling pipe to flow towards the welding area and diffuse radially along the second pipe body. This reduces interference with the gas flow of the welding torch, ensures uniform and stable gas flow in the welding area, thereby improving welding quality, reducing the generation of defects such as porosity and cracks, and thus helping to improve the strength and appearance of the welded joint and extend the service life of the equipment. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of a traditional argon filling device;
[0032] Figure 2 This is a schematic diagram of the gas flow distribution in a traditional argon-filling device;
[0033] Figure 3 This is a schematic diagram of an embodiment of the argon purging welding apparatus provided in this application;
[0034] Figure 4 This is a schematic diagram of the airflow distribution in one embodiment of the argon purging welding apparatus provided in this application;
[0035] Figure 5 A schematic flowchart of an embodiment of the method for manufacturing the argon purging welding apparatus provided in this application;
[0036] Figure 6 A schematic flowchart of another embodiment of the method for manufacturing the argon purging welding apparatus provided in this application;
[0037] Figure 7 This is a schematic flowchart of another embodiment of the method for manufacturing the welding argon purging device provided in this application.
[0038] Figure label:
[0039] 100. Cutting torch; 200. Oxygen connector; 300. Argon filling pipe; 310. First pipe body; 320. Second pipe body; 330. Exhaust port; 400. Argon gas; 500. Welding torch gas flow. Detailed Implementation
[0040] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this application. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.
[0041] The embodiments described in this application are only some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application. In the description of this application, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0042] In traditional welding processes, especially in argon arc welding, inert gases such as argon are needed for protection to prevent oxidation of the metal in the weld area. Argon has good chemical stability and can effectively isolate oxygen and moisture from the air, ensuring the quality of the weld metal. However, in actual welding operations, the protective gas flow inside the pipe is often interfered with by the external ambient airflow or the airflow from the welding equipment, thus affecting the protection effect.
[0043] Argon purging devices are primarily used in welding to provide a stable argon gas flow to the welding area, thereby preventing metal surface oxidation. However, the argon gas flow generated by traditional argon purging devices is prone to interference or collision with the welding torch gas flow, resulting in turbulent airflow. This airflow interference may cause the gas flow to fail to uniformly cover the welding area, thus affecting the quality of the weld.
[0044] The inventor's research revealed that... (Please refer to...) Figure 1 and Figure 2 In traditional argon-filled devices, the argon gas exiting from the pipe end moves in the opposite direction to the welding torch gas flow, causing interference and turbulence between the two gas flows. This collision and interaction disrupts the stability of the welding torch gas flow, resulting in uneven coverage of the welding area. Due to the instability of the shielding gas flow, the metal surface in the welding area is easily exposed to the air, increasing the risk of defects such as oxidation and porosity, severely impacting welding quality and efficiency.
[0045] To address the aforementioned technical problems, this application proposes a welding argon purging device. Please refer to [link / reference needed]. Figure 3 and Figure 4 In one embodiment of this application, the argon-filling welding device includes: a cutting torch 100, an oxygen connector 200, and an argon-filling pipe 300. One end of the oxygen connector 200 is connected to the cutting torch 100. The argon-filling pipe 300 has one end connected to the other end of the oxygen connector 200. The argon-filling pipe 300 includes a first pipe body 310 and a second pipe body 320 integrally formed and bent in an L-shape. The end of the first pipe body 310 opposite to the second pipe body 320 is connected to the oxygen connector 200. The end of the second pipe body 320 opposite to the first pipe body 310 is closed. The second pipe body 320 has an exhaust hole 330 that extends radially through the second pipe body 320, so that the argon gas 400 in the argon-filling pipe 300 flows to the welding area and diffuses radially along the second pipe body 320.
[0046] The technical solution of this application employs a second tube 320 with an exhaust hole 330 that extends radially through the second tube 320. This allows the argon gas 400 in the argon filling pipe 300 to flow to the welding area and diffuse radially along the second tube 320. This reduces interference with the welding torch gas flow 500, ensuring uniform and stable gas flow in the welding area. Consequently, it improves welding quality, reduces defects such as porosity and cracks, and ultimately enhances the strength and appearance of the welded joint, extending the service life of the equipment.
[0047] Please see Figure 3 and Figure 4 In one embodiment, there are two vent holes 330, which are spaced apart along the axial direction of the second pipe body 320. This embodiment, by providing two vent holes 330 spaced apart along the axial direction on the second pipe body 320, allows the argon gas 400 to form a more uniform distribution inside the pipe and be discharged smoothly, thereby reducing gas flow concentration and turbulence, ensuring more thorough coverage of the welding area by the protective atmosphere, and improving the stability and quality of the weld formation.
[0048] Please see Figure 3 In one embodiment, the interval between the two vent holes 330 is P, where 3mm ≤ P ≤ 5mm. This embodiment controls the interval between the two vent holes 330 within a reasonable range, ensuring a uniform gas distribution during exhaust. This effectively prevents the gas flow from being too concentrated or sparse, avoids blind spots in the protective atmosphere, ensures the welding area remains in a stable protective state, and improves welding reliability.
[0049] Please see Figure 3 In one embodiment, the diameter of the vent hole 330 is D, where 1.4 mm ≤ D ≤ 1.6 mm. This embodiment, by limiting the diameter of the vent hole 330 to a suitable range, keeps the flow rate and velocity of the discharged argon gas 400 within a stable range, thereby effectively avoiding excessive gas flow impacting the weld pool or insufficient protection due to insufficient gas flow, ensuring sufficient and stable shielding gas action, and improving the density and quality of the weld pool.
[0050] Please see Figure 3 In one embodiment, the radius of curvature of the L-shaped bend is R, where R ≥ 5 mm. This embodiment, by employing a reasonable radius of curvature design at the L-shaped bend, makes the gas flow at the bend smoother and more stable, thereby avoiding turbulence and energy loss caused by sharp bends in the airflow, maintaining the stability and continuity of the protective gas, and further improving the protective effect during the welding process.
[0051] Please see Figure 3In one embodiment, the thickness of the argon-filled pipe 300 is t, where 2.6 mm ≤ t ≤ 2.9 mm. This embodiment controls the wall thickness of the argon-filled pipe 300 within a reasonable range, ensuring sufficient strength and durability without increasing gas flow resistance due to excessive thickness. This achieves a balance between stable gas flow and pipe lifespan, ensuring a more reliable and efficient welding process.
[0052] Please see Figure 3 In one embodiment, the argon-filling pipe 300 is flat. This embodiment, by designing the argon-filling pipe 300 as flat, allows the gas flow inside the pipe to be evenly distributed over a large cross-sectional area, thereby effectively improving the gas diffusion effect in the welding area, avoiding excessive concentration or deviation of local gas flow, ensuring comprehensive and stable protective atmosphere coverage, and improving weld density and forming quality.
[0053] Please see Figure 3 In one embodiment, the inner diameter of the argon-filling pipe 300 is d, where 4mm ≤ d ≤ 6mm. This embodiment, by limiting the inner diameter of the argon-filling pipe 300 within a reasonable range, keeps the gas flow velocity and flow rate in the pipe within a stable range, thereby effectively avoiding excessive gas flow impacting the molten pool or insufficient gas flow leading to inadequate protection, ensuring a continuous and stable gas supply in the welding area, and ensuring a more reliable welding process.
[0054] Please see Figure 3 In one embodiment, the length of the argon-filling pipe 300 is x, where 140mm ≤ x ≤ 160mm. This embodiment controls the length of the argon-filling pipe 300 within a suitable range, ensuring stable gas flow during transport while avoiding pressure loss due to excessive length. This achieves a sufficient supply of protective gas in the welding area, ensuring stable coverage and improving the continuity and consistency of welding operations.
[0055] Please see Figure 3 In one embodiment, the argon-filling pipeline 300 is made of stainless steel or a fast-oxygenating copper tube from a scrap cutting torch 100. This embodiment, by selecting stainless steel or a fast-oxygenating copper tube from a scrap cutting torch 100 as the material for the argon-filling pipeline 300, ensures that the pipeline possesses both excellent high-temperature resistance and corrosion resistance, while also being economical and reusable. This extends the pipeline's service life, reduces operating costs, and simultaneously guarantees the stability and safety of gas transmission.
[0056] Furthermore, to achieve the above objectives, this application also proposes a method for manufacturing a welding argon purging device. In one embodiment, please refer to... Figure 5 The method for manufacturing this argon-filled welding device includes the following steps:
[0057] S10, the bent pipe forms the first and second pipe bodies in an L-shaped distribution.
[0058] In step S10, the bent pipe forms a first pipe body and a second pipe body with an L-shaped distribution. In practice, the bending angle and bending radius are precisely controlled to ensure that the shape of the pipe is stable and unaffected by external forces. Through this design, the pipe can better adapt to the spatial requirements of the welding environment, while ensuring the smooth delivery of gas flow and avoiding pressure fluctuations caused by excessively long or short pipes, thereby ensuring the consistency and reliability of the gas shielding effect during the welding process.
[0059] S20. Seal the end of the second tube that is away from the first tube.
[0060] In step S20, the end of the second pipe body facing away from the first pipe body is sealed. This is achieved through welding or mechanical sealing to ensure a good seal at the pipe's sealing point. This sealing process effectively prevents gas leakage, ensures the airtightness of the argon-filled pipe, guarantees the continuous and stable flow of argon gas within the pipe, further optimizes the stability of the protective atmosphere, and avoids quality problems caused by gas leakage during welding.
[0061] S30. An exhaust port is opened on the second pipe body.
[0062] In step S30, an exhaust port is opened on the second pipe body. Specifically, a hole is drilled at a suitable location on the second pipe body to ensure that the exhaust port is aligned with the airflow direction inside the pipe. This design allows the airflow to be discharged evenly, avoiding airflow turbulence caused by concentrated discharge, ensuring uniform distribution of protective gas, improving welding quality, and reducing weld defects such as porosity and oxidation.
[0063] S40. Connect the end of the first tube that is away from the second tube to the oxygen connector.
[0064] In step S40, the end of the first pipe body facing away from the second pipe body is connected to the oxygen connector. Specifically, a threaded connection or welding is used to ensure a secure and reliable connection. This connection method effectively connects the oxygen and argon-filling pipelines, ensuring smooth and stable gas flow during argon filling, providing the necessary protective atmosphere for the welding area, optimizing the welding environment, and improving the overall welding effect and quality.
[0065] In another implementation, please refer to Figure 6 The manufacturing method of the above-mentioned argon-filled welding device includes the following steps:
[0066] A10. Welding wire is threaded inside the pipe.
[0067] In step A10, welding wire is threaded through the pipe. In practice, the welding wire is precisely placed in the central area of the pipe to ensure even distribution, facilitating subsequent operations. This arrangement ensures that the pipe maintains adequate internal support during deformation, preventing asymmetrical deformation due to uneven stress, ensuring the overall structural stability of the pipe, and providing a foundation for subsequent bending and closure steps.
[0068] A20. Tap the pipe to flatten it.
[0069] In step A20, the pipe is tapped to flatten its shape. Specifically, the tapping force and uniformity are controlled to ensure that the pipe does not develop cracks or uneven shapes during deformation. This process effectively adjusts the pipe's shape to suit subsequent pipe connections and airflow guidance requirements, further improving gas flow smoothness and ensuring that the protective atmosphere during welding is not affected by improper pipe shape.
[0070] A30. Pull out the welding wire from the pipe.
[0071] In step A30, the welding wire is extracted from the pipe. Specifically, this is done mechanically or manually to safely remove the welding wire, ensuring the pipe's interior is thoroughly cleaned. This operation prevents any impurities or excess material from remaining in the pipe, avoiding any impact on subsequent gas flow and welding results. It ensures the pipe's airtightness and protective effect during use, thus improving welding quality.
[0072] A40, the bent pipe forms the first and second pipe bodies in an L-shaped distribution.
[0073] In step A40, the pipe is bent to form a first and second pipe body with an L-shaped distribution. In practice, a precise bending process is used to control the bending angle and radius of curvature of the pipe to ensure that the pipe meets the design requirements. Through this step, the pipe can flexibly adapt to the spatial layout requirements of the welding equipment, while maintaining uniform airflow and avoiding excessive or uneven airflow resistance caused by improper bending, thus ensuring stable delivery of argon gas.
[0074] A50. Seal the end of the second tube that is away from the first tube.
[0075] In step A50, the end of the second pipe body facing away from the first pipe body is sealed. Specifically, welding or mechanical sealing methods are used to ensure the tightness of the sealed area. This sealing process ensures good gas tightness of the pipeline, prevents leakage of argon gas during transportation, further enhances the gas protection effect during welding, ensures the welding area is always in a stable protective atmosphere, and improves welding quality.
[0076] A60. An exhaust port is opened on the second pipe body.
[0077] In step A60, an exhaust port is opened on the second pipe body. In practice, a suitable location for the exhaust port is selected and the hole is precisely drilled to ensure smooth airflow. Through this design, the gas in the pipe can be discharged smoothly, avoiding airflow accumulation or uneven gas pressure, further ensuring that the protective gas can effectively cover the welding area, improving welding stability, and reducing welding defects caused by uneven airflow.
[0078] A70. Connect the end of the first tube that is away from the second tube to the oxygen connector.
[0079] In step A70, the end of the first tube opposite to the second tube is connected to the oxygen connector. Specifically, a reliable connection method (such as welding or threaded connection) ensures effective oxygen delivery. This connection method allows for more precise matching between the oxygen and argon gas, ensuring stable gas flow during welding and providing a sufficient protective atmosphere for the welding area, thereby improving welding quality and efficiency.
[0080] In another embodiment, please refer to Figure 7 The manufacturing method of the above-mentioned argon-filled welding device includes the following steps:
[0081] B10. Welding wire is threaded inside the pipe.
[0082] In step B10, welding wire is threaded inside the pipe. Specifically, the welding wire is precisely inserted into the pipe to ensure even distribution and to provide support during subsequent processing. This operation ensures that the pipe will not deform or shift during subsequent bending, maintaining its structural stability and providing the necessary foundation for subsequent processing.
[0083] B20. Tap the pipe to flatten it.
[0084] In step B20, the pipe is tapped to flatten its shape. Specifically, the force and direction of the tapping are controlled to ensure a uniformly flattened shape without cracks or excessive localized stress. This step adapts the pipe's shape to the needs of subsequent welding and airflow guidance, while reducing space requirements and allowing for smoother airflow.
[0085] B30. Grind the flat surface of the pipe on both sides.
[0086] In step B30, the flat surface of the pipe is ground on both sides. Specifically, suitable grinding tools and abrasives are used to ensure a smooth and flat surface. This operation removes any possible oxide layer and impurities from the pipe surface, thereby ensuring the quality of the argon-filled pipe.
[0087] B40. Measure the thickness of the pipe.
[0088] In step B40, the thickness of the pipe is measured. Specifically, a precise measuring tool is used to check whether the pipe thickness meets the design requirements. This operation ensures consistency and accuracy during pipe manufacturing, preventing inconsistent welding results due to uneven pipe thickness, thereby improving the overall reliability and quality of the weld.
[0089] B50. Pull out the welding wire from the pipe.
[0090] In step B50, the welding wire is extracted from the pipe. Specifically, a special tool is used to smoothly remove the welding wire from the pipe, ensuring the internal space of the pipe is clean. This operation removes unnecessary substances from the pipe, preventing them from affecting gas flow and welding quality, ensuring the pipe's airtightness and smooth gas flow, and improving the atmosphere protection effect during the welding process.
[0091] B60, the bent pipe forms the first and second pipe bodies in an L-shaped distribution.
[0092] In step B60, the pipes are bent to form a first and second pipe body in an L-shape. In practice, appropriate bending tools and methods are used to ensure that the bending angle and radius precisely meet the design requirements. This operation allows the pipes to better adapt to the spatial layout of the welding equipment, maintains a uniform airflow distribution, and avoids airflow instability or pipe damage due to improper bending.
[0093] B70. Seal the end of the second tube that is away from the first tube.
[0094] In step B70, the end of the second pipe body facing away from the first pipe body is sealed. Specifically, this is achieved through welding or mechanical sealing to ensure good airtightness at the sealed area. This operation effectively prevents gas leakage at the sealed end of the pipe, ensures stable flow of argon gas within the pipe, improves the stability of the protective atmosphere during welding, and further optimizes the welding effect.
[0095] B80. An exhaust port is opened on the second pipe body.
[0096] In step B80, an vent hole is made on the second pipe body. During implementation, precise positioning and drilling tools are used to ensure the vent hole's size and location are appropriate. This design allows gas inside the pipe to escape smoothly, preventing accumulation or uneven airflow, improving the protective gas coverage, thereby enhancing welding quality and reducing defects.
[0097] B90. Connect the end of the first tube that is away from the second tube to the oxygen connector.
[0098] In step B90, the end of the first tube facing away from the second tube is connected to the oxygen connector. In practice, a reliable connection method, such as welding or threaded connection, is used to ensure the airtightness of the connection. This operation allows for a smooth connection between the oxygen and argon gas, ensuring stable gas flow during welding, optimizing the atmosphere protection in the welding area, and improving welding quality.
[0099] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this application and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this application should be included within the protection scope of this application. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.
Claims
1. A welding argon-filling device, characterized in that, include: A cutting torch and an oxygen connector, one end of which is connected to the cutting torch; An argon-filling pipe is provided, one end of which is connected to the other end of the oxygen connector. The argon-filling pipe includes a first pipe body and a second pipe body that are integrally formed and bent in an L-shape. The end of the first pipe body opposite to the second pipe body is connected to the oxygen connector. The end of the second pipe body opposite to the first pipe body is closed. The second pipe body has an exhaust hole that extends radially through the second pipe body so that the argon gas in the argon-filling pipe flows towards the welding area and diffuses radially along the second pipe body.
2. The welding argon purging apparatus according to claim 1, characterized in that, The number of exhaust holes is two, and the two exhaust holes are distributed at intervals along the axial direction of the second pipe body.
3. The welding argon purging apparatus according to claim 2, characterized in that, The interval between the two exhaust holes is P, where 3mm ≤ P ≤ 5mm.
4. The welding argon purging apparatus according to claim 1, characterized in that, The diameter of the exhaust port is D, where 1.4mm ≤ D ≤ 1.6mm.
5. The welding argon purging apparatus according to claim 1, characterized in that, The radius of curvature of the L-shaped bend is R, where R ≥ 5 mm.
6. The welding argon purging apparatus according to claim 1, characterized in that, The thickness of the argon-filling pipe is t, where 2.6 mm ≤ t ≤ 2.9 mm.
7. The welding argon purging apparatus according to claim 1, characterized in that, The argon-filling pipe is flat in shape; And / or, the inner diameter of the argon filling pipe is d, 4mm≤d≤6mm; And / or, the length of the argon-filling pipe is x, 140mm≤x≤160mm; And / or, the argon-filling pipeline is made of stainless steel or a fast-oxygenating copper pipe from a scrap cutting torch.
8. A method for manufacturing a welding argon-filling device, characterized in that, The method for manufacturing the argon-filled welding apparatus is applied to the argon-filled welding apparatus as described in any one of claims 1 to 7, and the method for manufacturing the argon-filled welding apparatus includes: The bent pipe forms the first pipe body and the second pipe body in an L-shape; Seal the end of the second tube that is away from the first tube; The exhaust hole is opened on the second pipe body; Connect the end of the first tube that is away from the second tube to the oxygen connector.
9. The method for manufacturing the argon-filled welding device according to claim 8, characterized in that, Before bending the pipe, it also includes: Welding wire is threaded inside the pipe; Tapping the pipe flattens it. Pull out the welding wire from the pipe.
10. The method for manufacturing the argon-filled welding device according to claim 9, characterized in that, Before removing the welding wire from the pipe, the process also includes: The flat surface of the pipe is ground on both sides; Measure the thickness of the pipe.