irregular aluminum flux-cored welding wire

Abstract

This utility model discloses an irregularly shaped aluminum flux-cored welding wire, comprising an aluminum sheet and a welding powder layer wrapped inside the aluminum sheet. The aluminum sheet includes an upper connecting part and a lower connecting part, one side of which is integrally formed, and the other side of which forms a seam. An interlayer is formed between the upper connecting part and the lower connecting part. A sealing structure is provided at the seam to prevent aluminum powder from overflowing. The sealing structure includes a bent part integrally formed on the edge of the lower connecting part. This utility model adopts a structure in which the aluminum sheet wraps the welding powder, and the aluminum sheet forms an interlayer through the upper and lower connecting parts to accommodate the welding powder. Combined with the concave edge structure formed by pressing at the seam, it can prevent the welding powder from overflowing, ensure that the welding powder is fully heated during the welding process, and the surface is clean and free of welding slag after welding. No additional cleaning of welding slag is required. Compared with traditional aluminum welding sheets that need to be coated with powder separately, it can simplify the preparation process before and after welding.

Description

Technical Field

[0001] This utility model relates to the field of aluminum brazing technology, specifically to irregularly shaped aluminum flux-cored welding wire. Background Technology

[0002] In the brazing of heating element, heating plate and stainless steel base of electric kettle, two processes need to be completed before welding with ordinary aluminum welding sheet: first, a layer of aluminum welding powder is applied to the surface of the workpiece to act as a welding aid, help remove the oxide film on the welding surface and promote the wetting and bonding of the solder with the base material; second, the surface of the workpiece needs to be sandblasted.

[0003] The powder coating and sandblasting processes in the first step generate a significant amount of dust, polluting the environment and posing a health hazard. Furthermore, the traditional method of adding welding powder to aluminum welding sheets is prone to uneven localized temperatures during welding, leading to incomplete powder reaction and resulting in blackened weld slag on the surface. This not only affects the visual assessment of weld quality but also necessitates an additional sandblasting process to remove the slag after welding. These two processes are therefore time-consuming, impacting production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a non-circular aluminum flux-cored welding wire. By encapsulating welding powder inside an aluminum sheet, there is no need to apply powder coating to the surface of the base material during use. The flux inside the aluminum sheet can be fully heated during welding, and no black welding slag will be produced after welding. This eliminates the need for the subsequent sandblasting process to remove black slag, reduces environmental pollution, and improves product production efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shaped aluminum flux-cored welding wire, comprising an aluminum sheet and a welding powder layer wrapped inside the aluminum sheet;

[0006] The aluminum sheet includes an upper connecting part and a lower connecting part. One side of the upper connecting part and the lower connecting part are integrally formed, and a seam is formed on the other side of the upper connecting part and the lower connecting part. An interlayer is formed between the upper connecting part and the lower connecting part, and the solder powder layer is filled in the interlayer. A sealing structure is provided at the seam to prevent aluminum powder from overflowing.

[0007] Preferably, the sealing structure includes a bent portion integrally formed on the edge of the lower connecting portion, one side of the bent portion is formed into a concave edge after being pressed by a rolling mill, and one side of the upper connecting portion is in close contact with the concave edge.

[0008] Preferably, the aluminum sheet is arranged in a ring after wrapping the solder powder layer, and several aluminum sheets are stacked vertically.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. This utility model adopts an aluminum sheet to wrap welding powder, and the aluminum sheet forms an interlayer to accommodate the welding powder through the upper and lower connecting parts. Combined with the concave edge structure formed by pressing at the joint, it can prevent the welding powder from overflowing, ensure that the welding powder can be fully heated during the welding process, and the surface is clean and free of welding slag after welding. No additional cleaning of welding slag is required. Compared with traditional aluminum welding sheets that need to be coated with powder separately, it can simplify the preparation process before and after welding.

[0011] 2. Since the welding powder is pre-coated inside the aluminum sheet, there is no need to apply powder to the surface of the base material during use. This eliminates the need for sandblasting to remove black slag, reduces dust generation in traditional processes, lowers environmental pollution, and avoids the harm of dust to workers' health. It also reduces labor time and worker input. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of several aluminum sheets stacked together according to this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of a single aluminum sheet of this utility model;

[0014] Figure 3 This is a schematic diagram of the transmission mechanism of this utility model;

[0015] Figure 4 This is a schematic diagram of the cross-section of the aluminum sheet of this utility model.

[0016] In the diagram: 1. Aluminum sheet; 2. Welding powder layer; 101. Upper connecting part; 102. Lower connecting part; 103. Seam; 104. Interlayer; 105. Sealing structure; 1051. Bending part; 1052. Concave edge. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 This utility model provides a technical solution: an irregularly shaped aluminum flux-cored welding wire, including an aluminum sheet 1 and a welding powder layer 2 wrapped inside the aluminum sheet 1; by coating the aluminum sheet 1 with powder, the process of separately coating powder before welding is eliminated, dust pollution is reduced, and at the same time, the welding powder is kept in close contact with the aluminum sheet 1, creating conditions for uniform heating during welding.

[0019] The aluminum sheet 1 includes an upper connecting part 101 and a lower connecting part 102. The upper connecting part 101 and the lower connecting part 102 are integrally formed on one side. A seam 103 is formed on the other side of the upper connecting part 101 and the lower connecting part 102. An interlayer 104 is formed between the upper connecting part 101 and the lower connecting part 102. The interlayer 104 provides a stable carrier for the solder powder filling and avoids the solder powder from scattering during the filling process. The solder powder layer 2 is filled in the interlayer 104. A sealing structure 105 is provided at the seam 103 to prevent aluminum powder from overflowing.

[0020] The sealing structure 105 includes a bent portion 1051 integrally formed on the edge of the lower connecting portion 102. One side of the bent portion 1051 is formed into a concave edge 1052 after being pressed by a rolling mill. Figure 4 As shown, when the upper connecting part 101 and the lower connecting part 102 are rolled together after being attached, the deformation of the aluminum sheet 1 makes the connection between the upper connecting part 101 and the lower connecting part 102 fit together, and one side of the upper connecting part 101 is close to the concave edge 1052.

[0021] The aluminum sheet 1 is arranged in a ring after wrapping the welding powder layer 2. The welding powder is wrapped inside the aluminum sheet 1, which makes the heat distribution more uniform and the welding powder reaction more complete during welding. At the same time, it is suitable for the welding trajectory of round workpieces, such as heating plates and stainless steel bases, and improves the convenience of operation. Several aluminum sheets 1 are stacked in a vertical position.

[0022] During production, aluminum sheet 1 is first processed into a U-shaped groove by a rolling mill. The groove structure forms a preliminary space to accommodate welding powder. Then, the U-shaped groove is further processed by the rolling mill into a circle. During this process, welding powder is simultaneously coated inside the aluminum sheet 1 to form a closed sandwich structure 104 containing welding powder layer 2. At this time, the upper connecting part 101 and the lower connecting part 102 of the aluminum sheet 1 are integrally formed on one side, and the other side forms a joint 103. The bent part 1051 of the lower connecting part 102 at the joint 103 is pressed by the rolling mill to form a concave edge 1052, which is close to the upper connecting part 101 to prevent welding powder from overflowing.

[0023] The prepared circular welding wire is placed into the punching die and punched to the preset thickness by a high-pressure punching machine to further ensure that the aluminum sheet 1 and the welding powder layer 2 are tightly bonded. After the stamping is completed, the welding wire is sorted and packed into boxes for easy transportation, storage and use on the production line.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A profiled aluminium cored welding wire, characterized in that: Includes an aluminum sheet (1) and a solder powder layer (2) encased within the aluminum sheet (1); The aluminum sheet (1) includes an upper connecting part (101) and a lower connecting part (102). One side of the upper connecting part (101) and the lower connecting part (102) are integrally formed. A seam (103) is formed on the other side of the upper connecting part (101) and the lower connecting part (102). An interlayer (104) is formed between the upper connecting part (101) and the lower connecting part (102). The solder powder layer (2) is filled in the interlayer (104). A sealing structure (105) is provided at the seam (103) to prevent aluminum powder from overflowing.

2. The profiled aluminum cored welding wire of claim 1, wherein: The sealing structure (105) includes a bent portion (1051) integrally formed on the edge of the lower connecting portion (102). One side of the bent portion (1051) is formed into a concave edge (1052) after being pressed by a rolling mill. One side of the upper connecting portion (101) is in close contact with the concave edge (1052).

3. The profiled aluminum cored welding wire of claim 2, wherein: The aluminum sheet (1) is arranged in a ring after wrapping the solder powder layer (2), and several aluminum sheets (1) are stacked in an up-down position.

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