Titanium alloy welding protection fixture

Abstract

The utility model relates to a hot battery titanium alloy welding technical field discloses a titanium alloy welding protection clamp, the clamp includes the clamping body, apron and argon joint, apron is connected with the clamping body and forms the welding space, and both inside intercommunication constitutes the closed cavity, the argon joint is connected with the clamping body and leads to the closed cavity, and the clamping body side to the welding space is equipped with a plurality of flow guide holes, and the flow guide hole aperture is phi 1mm and intercommunication closed cavity and welding space, and the welding space top is equipped with the exhaust hole, the clamping body is arc and is connected with apron perpendicularly, and the argon joint is welded in the clamping body side wall and is equipped with the connecting interface with sealing structure, the utility model discloses a stable protection atmosphere through the argon of directional flow in the welding space, effectively insulates the air, avoids the weld embrittlement caused by high temperature and hydrogen, nitrogen, oxygen reaction when titanium alloy welding, guarantees the welding strength, and the adaptability and sealing performance are excellent.

Description

Technical Field

[0001] This utility model relates to the field of titanium alloy welding technology for thermal batteries, and specifically to a titanium alloy welding protective clamp. Background Technology

[0002] As a high-power, rapidly activated energy storage device, thermal batteries typically employ a structure where the shell and battery cover are welded together. Some high-end models, to meet the requirements of high temperature resistance and high strength, use titanium alloy as the shell material. The welding process usually employs argon arc welding or plasma welding. While titanium alloys possess excellent mechanical properties, the high-temperature environment during welding significantly enhances their chemical activity, causing them to exhibit a strong affinity for gases such as hydrogen, nitrogen, and oxygen in the air.

[0003] This reaction leads to embrittlement of the weld and heat-affected zone, severely reducing the strength and toughness of the welded joint and failing to meet the structural reliability requirements of the thermal battery casing. Existing welding protection devices often suffer from poor adaptability, uneven gas distribution, and insufficient sealing performance, making it difficult to provide comprehensive and stable protection for arc-shaped titanium alloy workpieces. Therefore, a targeted protective fixture is urgently needed to address these technical pain points. Utility Model Content

[0004] The present invention aims to provide a protective fixture for titanium alloy welding, which addresses the problem of weld embrittlement and insufficient weld strength caused by contact with air during the titanium alloy welding process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a titanium alloy welding protection fixture, comprising a fixture body, a cover plate, and an argon gas connector; the cover plate is connected to the fixture body to form a welding space, the interior of the cover plate and the fixture body are connected to form a closed cavity, the argon gas connector is connected to the fixture body and communicates with the closed cavity, the fixture body has multiple guide holes on the side facing the welding space, and the fixture body has two semi-circular structures, namely an avoidance semi-circle and a mating semi-circle.

[0006] The principle of this solution is as follows: The cover plate is vertically connected to the arc-shaped clamp to form a welding space that is compatible with the titanium alloy workpiece, and the two together form a closed cavity. External argon gas enters the closed cavity through the argon gas connector with a sealed structure, and then flows evenly into the welding space through the φ1mm guide hole on the clamp, forming a protective enclosure for the welding area. The exhaust hole at the top of the welding space can balance the pressure inside the cavity, ensuring continuous flow of argon gas and avoiding air residue.

[0007] The advantages of this solution are: In practical applications, the enclosed cavity can store and buffer argon gas, avoiding the instability of airflow caused by direct argon delivery; the guide hole can directionally introduce argon gas into the welding space, ensuring that the argon gas acts on the welding area, forming a continuous and stable inert gas protective atmosphere, effectively isolating the contact between air and the welding part, fundamentally reducing the reaction of titanium alloy with hydrogen, nitrogen, and oxygen at high temperatures, avoiding weld embrittlement, and ensuring welding strength; at the same time, the combination structure of "clamp body - cover plate - argon gas connector" can form a protective system around the welding area, adapting to the needs of the scenario of welding titanium alloy for thermal batteries, with a simple structure and strong targeted protection.

[0008] Preferably, as an improvement, the diameter of the guide hole is φ1mm, one end of the guide hole is connected to the closed cavity, and the other end of the guide hole is connected to the welding space.

[0009] Preferably, as an improvement, the clamp is arc-shaped.

[0010] Preferably, as an improvement, the argon gas connector is welded to the side wall of the clamp body, one end of the argon gas connector is provided with a connection interface with a sealing structure for detachable and sealed connection with an external argon gas pipeline, and the other end of the argon gas connector passes through the clamp body and is connected to the closed cavity.

[0011] Preferably, as an improvement, the avoidance semicircle is used to avoid parts on the product to prevent interference; the mating semicircle is used to mate with the tip of the welding torch.

[0012] Preferably, as an improvement, the clamping body is vertically connected to the cover plate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the bottom structure of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the bottom structure of an embodiment of the present utility model.

[0014] The reference numerals in the accompanying drawings include: clamp body 1, cover plate 2, argon gas connector 3, guide hole 4, clearance semicircle 201, and mating semicircle 202. Detailed Implementation

[0015] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 1 -Appendix Figure 2As shown: A titanium alloy welding protective fixture includes a fixture body 1, a cover plate 2, and an argon gas connector 3. The cover plate 2 is connected to the fixture body 1, and the two cooperate to form a welding space 5 for placing titanium alloy workpieces and performing welding operations. The cover plate 2 is internally connected to the fixture body 1, and together they form a closed cavity 6 for storing and buffering argon gas. The argon gas connector 3 is connected to the fixture body 1, and the internal channel of the argon gas connector 3 is connected to the closed cavity 6, which can realize the delivery of external argon gas into the closed cavity 6. The fixture body 1 is provided with a guide hole 4 on the side facing the welding space 5. The two ends of the guide hole 4 are connected to the closed cavity 6 and the welding space 5, respectively, for guiding the argon gas in the closed cavity 6 to the welding space 5. The fixture body 1 is provided with two semi-circular structures, the left side is an avoidance semi-circle 7, and the right side is a matching semi-circle 8.

[0016] The specific implementation process is as follows: When using, first place the titanium alloy workpiece of the thermal battery to be welded (such as the cylindrical shell and battery cover) in the welding space 5, ensuring that the welding part of the workpiece is directly aligned with the guide hole 4 of the clamp 1; connect the external argon gas supply pipeline to the argon gas connector 3, turn on the argon gas supply device, and the argon gas enters the closed cavity 6 through the argon gas connector 3. After being buffered in the closed cavity 6, it flows into the welding space 5 through multiple guide holes 4 on the clamp 1, gradually filling the welding space 5 and venting the internal air; after the welding space 5 is filled with argon gas and a stable inert gas protective atmosphere is formed, start the welding equipment (such as an argon arc welding machine or a plasma welding machine) to perform welding operations on the titanium alloy workpiece.

[0017] During the welding process, argon gas is continuously supplied into the closed cavity 6. Argon gas is continuously replenished to the welding space 5 through the guide hole 4 to ensure that the welding area is always under argon gas protection, avoiding contact between the weld pool and the high-temperature heat-affected zone and the air, and preventing the weld from becoming brittle. After the welding is completed, argon gas is supplied for a period of time until the weld temperature drops to a safe range (to avoid reaction with air during the cooling process), and then the argon gas supply is turned off to complete the entire welding protection process.

[0018] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A titanium alloy welding protection clamp, characterized in that: It includes a clamp body, a cover plate, and an argon gas connector; the cover plate is connected to the clamp body to form a welding space, and the interiors of the cover plate and the clamp body are connected to form a closed cavity. The argon gas connector is connected to the clamp body and communicates with the closed cavity. The clamp body has multiple guide holes on the side facing the welding space. The clamp body has two semi-circular structures, namely an avoidance semi-circle and a mating semi-circle.

2. The titanium alloy welding protection fixture according to claim 1, characterized in that: The diameter of the guide hole is φ1mm. One end of the guide hole is connected to the closed cavity, and the other end of the guide hole is connected to the welding space.

3. The titanium alloy welding protection fixture according to claim 2, characterized in that: The clamp itself is arc-shaped.

4. The titanium alloy welding protection fixture according to claim 3, characterized in that: The argon gas connector is welded to the side wall of the clamp body. One end of the argon gas connector is provided with a connection interface with a sealing structure for detachable and sealed connection with an external argon gas pipeline. The other end of the argon gas connector passes through the clamp body and is connected to the closed cavity.

5. A titanium alloy welding protection fixture according to claim 4, characterized in that: The avoidance semicircle is used to avoid parts on the product and avoid interference; the mating semicircle is used to mate with the tip of the welding torch.

6. A titanium alloy welding protection fixture according to claim 5, characterized in that: The clamping body is perpendicularly connected to the cover plate.

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