A method of preparing a weld filler

Abstract

The application discloses a preparation method of a filler of a welded part, which comprises the following steps: mixing cement with water, stirring, loading the mixed cement into a mold, putting a hole forming part into the mold, taking out the cement after solidification and heating until the hole forming part is melted, processing the cement plate after cleaning the melted product into a required shape, putting the cement plate into an inner cavity of the welded part and fixing, removing the filler in the inner cavity of the welded part after the welding of the welded part is completed, and cleaning the inner cavity of the welded part. The small pipeline formed on the cement plate by the hole forming part is helpful to the diffusion of the cement dissolving agent added later, so that the cement dissolving efficiency is increased. The rigid clamping is helpful to the stability improvement in the welding process, and the filler prepared by the method can reduce the deformation rate of the welded part after welding, so that the welding quality is ensured.

Description

Technical Field

[0001] This invention belongs to the field of welding filler technology, and particularly relates to a method for preparing welding filler. Background Technology

[0002] When welding thin-walled cavities, deformation is a common problem. Currently, external clamping methods are often used, which cannot rigidly hold the internal cavity of the weldment, making it impossible to constrain deformation during welding and thus failing to guarantee the required dimensions. Therefore, a filler material that can effectively control deformation during the welding of thin-walled cavities is needed.

[0003] Patent application number 2020110602328 discloses a welding protection device and method for thin-walled tubes. This invention tightens the thin-walled tube using a fastening sleeve and fastening pin, allowing protective gas to be directly and evenly distributed into a second groove through a first groove, preventing welding deformation of the thin-walled tube, compensating for the limited welding space, and improving welding efficiency. However, this method uses gas for protection, which places high demands on construction conditions and the airtightness of the parts, thus limiting its application scope. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for preparing filler for welded parts, which can solve the problem of large deformation rate of thin-walled welded parts during welding.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a method for preparing filler for welded parts, comprising the following steps:

[0007] S1: Mix cement and water, pour the mixture into a mold, then place the hole-forming part into the mold. After the cement hardens, remove the mold to obtain a mixture of cement board and hole-forming part.

[0008] S2: Heat the mixture until the hole-forming part melts, then clean the remaining melted material from the hole-forming part inside the cement board, process the cement board into the required shape to obtain the filler, place the filler into the inner cavity of the welded part and fix it, and after the welded part is welded, remove the filler from the inner cavity of the welded part and clean the inner cavity of the welded part.

[0009] Preferably, the hole-forming component is woven from hole-forming wires, and the hole-forming component is provided with a plurality of transverse hole-forming wires arranged at equal intervals, and a plurality of longitudinal hole-forming wires arranged at equal intervals are provided on the plurality of transverse hole-forming wires arranged at equal intervals.

[0010] Preferably, the hole-forming wire is a welding wire.

[0011] Preferably, in step S2, the cement board is machined to the desired shape using a milling machine or a lathe.

[0012] Preferably, in step S2, the mixture is slowly heated to 180-200°C.

[0013] Preferably, the welding wire is a tin brazing wire.

[0014] Preferably, the diameter of the welding wire is 2-5 mm.

[0015] Preferably, in step S2, the filler is removed by adding cement solvent into the cavity of the welded part.

[0016] Preferably, the perforating element is arranged in a multi-layered mesh.

[0017] The beneficial effects of this invention are as follows:

[0018] This invention utilizes a hole-forming component made of solder wire to create a filler material with numerous tiny channels in a cement board. This filler material is then shaped to fit the weldment, allowing it to fill the internal cavity of the weldment and achieve rigid clamping of thin-walled weldments. The tiny channels formed by the hole-forming component in the cement board facilitate the full diffusion of the cement solvent added later, thereby increasing the efficiency of cement dissolution. Rigid clamping significantly improves stability during the welding process. Using the filler material prepared by this invention reduces the deformation rate of the weldment after welding, thus ensuring weld quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the mold and the hole-forming part of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of region A of the present invention;

[0021] Figure 3 This is a structural schematic diagram of the welded component;

[0022] In the diagram: 1-Mold, 2-Drilling part, 3-Drilling wire, 4-Welding part A, 5-Welding part B, 6-Connecting ring A, 7-Connecting ring B. Detailed Implementation

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0024] Example 1:

[0025] like Figure 1-3 As shown, a method for preparing filler for welded parts includes the following steps:

[0026] S1: Mix cement and water, pour the mixed cement into mold 1, then place the hole-forming part 2 into mold 1. After the cement solidifies, remove it to obtain a mixture of cement board and hole-forming part 2.

[0027] S2: Heat the mixture until the hole-forming part 2 melts, then clean the remaining melted material from the hole-forming part 2 inside the cement board. Compressed air can be used to blow out the melted material. Process the cement board into the required shape to obtain the filler. Place the filler into the inner cavity of the welded part and fix it. After the welded part is welded, remove the filler from the inner cavity of the welded part and clean the inner cavity of the welded part.

[0028] The hole-forming component 2 is woven from hole-forming wires 3. The hole-forming component 2 is provided with several transverse hole-forming wires 3 arranged at equal intervals, and several longitudinal hole-forming wires 3 are arranged at equal intervals on the several transverse hole-forming wires 3 arranged at equal intervals.

[0029] The hole-forming wire 3 is a welding wire.

[0030] In step S2, the cement board is machined to the required shape using a milling machine or a lathe. If the required shape of the cement board is complex, a CNC milling machine can be used; if the required shape is simple, a conventional milling machine can be used; and if the required shape is circular, a lathe can be used.

[0031] In step S2, the mixture is slowly heated to 180°C. This slow heating is used to prevent the cement board from cracking.

[0032] The welding wire is a tin brazing wire, which can melt when heated, making it easy to remove from the cement board.

[0033] The diameter of the welding wire is 2mm, which facilitates the flow of cement solvent into the channel formed by the welding wire within the filler, so as to quickly dissolve the filler.

[0034] In step S2, the filler is removed by adding a cement solvent into the cavity of the welded part. The cement solvent must be a type that does not react with metal.

[0035] The perforating element 2 is arranged in a multi-layered mesh, i.e. a three-dimensional mesh, which facilitates the formation of more pipes within the cement slab.

[0036] Example 2:

[0037] like Figure 1-3 As shown, a method for preparing filler for welded parts includes the following steps:

[0038] S1: Mix cement and water, pour the mixed cement into mold 1, then place the hole-forming part 2 into mold 1. After the cement solidifies, remove it to obtain a mixture of cement board and hole-forming part 2.

[0039] S2: Heat the mixture until the hole-forming part 2 melts, then clean the remaining melted material from the hole-forming part 2 inside the cement board. Compressed air can be used to blow out the melted material. Process the cement board into the required shape to obtain the filler. Place the filler into the inner cavity of the welded part and fix it. After the welded part is welded, remove the filler from the inner cavity of the welded part and clean the inner cavity of the welded part.

[0040] The hole-forming component 2 is woven from hole-forming wires 3. The hole-forming component 2 is provided with several transverse hole-forming wires 3 arranged at equal intervals, and several longitudinal hole-forming wires 3 are arranged at equal intervals on the several transverse hole-forming wires 3 arranged at equal intervals.

[0041] The hole-forming wire 3 is a welding wire.

[0042] In step S2, the cement board is machined to the required shape using a milling machine or a lathe. If the required shape of the cement board is complex, a CNC milling machine can be used; if the required shape is simple, a conventional milling machine can be used; and if the required shape is circular, a lathe can be used.

[0043] In step S2, the mixture is slowly heated to 200°C. This slow heating is used to prevent the cement board from cracking.

[0044] The welding wire is a tin brazing wire, which can melt when heated, making it easy to remove from the cement board.

[0045] The diameter of the welding wire is 5mm, which facilitates the flow of cement solvent into the channel formed by the welding wire within the filler, so as to quickly dissolve the filler.

[0046] In step S2, the filler is removed by adding a cement solvent into the cavity of the welded part. The cement solvent must be a type that does not react with metal.

[0047] The perforating element 2 is arranged in a multi-layered mesh, i.e. a three-dimensional mesh, which facilitates the formation of more pipes within the cement slab.

[0048] Example 3:

[0049] like Figure 1-3 As shown, a method for preparing filler for welded parts includes the following steps:

[0050] S1: Mix cement and water, pour the mixed cement into mold 1, then place the hole-forming part 2 into mold 1. After the cement solidifies, remove it to obtain a mixture of cement board and hole-forming part 2.

[0051] S2: Heat the mixture until the hole-forming part 2 melts, then clean the remaining melted material from the hole-forming part 2 inside the cement board. Compressed air can be used to blow out the melted material. Process the cement board into the required shape to obtain the filler. Place the filler into the inner cavity of the welded part and fix it. After the welded part is welded, remove the filler from the inner cavity of the welded part and clean the inner cavity of the welded part.

[0052] The hole-forming component 2 is woven from hole-forming wires 3. The hole-forming component 2 is provided with several transverse hole-forming wires 3 arranged at equal intervals, and several longitudinal hole-forming wires 3 are arranged at equal intervals on the several transverse hole-forming wires 3 arranged at equal intervals.

[0053] The hole-forming wire 3 is a welding wire.

[0054] In step S2, the cement board is machined to the required shape using a milling machine or a lathe. If the required shape of the cement board is complex, a CNC milling machine can be used; if the required shape is simple, a conventional milling machine can be used; and if the required shape is circular, a lathe can be used.

[0055] In step S2, the mixture is slowly heated to 188°C. This slow heating is used to prevent the cement board from cracking.

[0056] The welding wire is a tin brazing wire, which can melt when heated, making it easy to remove from the cement board.

[0057] The diameter of the welding wire is 4mm, which facilitates the flow of cement solvent into the channel formed by the welding wire within the filler, so as to quickly dissolve the filler.

[0058] In step S2, the filler is removed by adding a cement solvent into the cavity of the welded part. The cement solvent must be a type that does not react with metal.

[0059] The perforating element 2 is arranged in a multi-layered mesh, i.e. a three-dimensional mesh, which facilitates the formation of more pipes within the cement slab.

[0060] like Figure 3 The irregular welded component shown includes two welded components A4 and two welded components B5 connected together. One side of the irregular welded component consists of two welded components A4, and the other side consists of two welded components B5. Welded components A4 and B5 are arranged in a V-shape. One end of welded component A4 is provided with a connecting ring A6, and one end of welded component B5 is provided with a connecting ring B7. Connecting rings A6 and B7 can be used for welding connections with other structures.

[0061] The fillers prepared in Examples 1-3 were placed in, as follows: Figure 3The filler material can be placed in multiple pieces into the inner cavity of the irregular welded parts shown (i.e., the inner cavities of the two welded parts A4 and the two welded parts B5). The wall thickness of the welded parts is 3mm. It is fixed by rigid clamping during welding. The deformation rate of the welded parts is measured before and after welding, as shown in Table 1.

[0062] Table 1 Deformation Rate of Welded Components

[0063] Deformation rate (%) 1.25 0.84 0.37

[0064] As shown in Table 1, the deformation rate of the welded parts filled with the fillers prepared in Examples 1-3 remained below 3% of the acceptable level after welding, which solved the technical problem that it was not convenient to rigidly clamp thin-walled welded parts during welding.

Claims

1. A method for preparing filler for welded parts, characterized in that: Includes the following steps: S1: After mixing cement and water, put the mixed cement into mold (1), then put the hole-forming part (2) into mold (1), and take it out after the cement solidifies to obtain a mixture of cement board and hole-forming part (2). S2: Heat the mixture until the hole forming part (2) melts, then clean the remaining molten material of the hole forming part (2) in the cement board, process the cement board into the required shape to obtain the filler, put the filler into the inner cavity of the welded part and fix it, after the welded part is welded, remove the filler from the inner cavity of the welded part and clean the inner cavity of the welded part. The hole-forming part (2) is woven from hole-forming wires (3). The hole-forming part (2) is provided with several transverse hole-forming wires (3) arranged at equal intervals. Several longitudinal hole-forming wires (3) are arranged at equal intervals on the several transverse hole-forming wires (3). The hole-forming wire (3) is a welding wire; The diameter of the welding wire is 2-5mm; The filler was removed by adding cement solvent to the cavity of the welded part; In step S2, the cement board is machined to the desired shape using a milling machine or a lathe.

2. The method for preparing a filler for a weldment as described in claim 1, characterized in that: In step S2, the mixture is slowly heated to 180-200°C.

3. The method for preparing a filler for a weldment as described in claim 1, characterized in that: The welding wire is a tin brazing wire.

4. The method for preparing a filler for a weldment as described in claim 1, characterized in that: The hole-forming component (2) is arranged in a multi-layered mesh.

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