A multi-layer sheet of thin plate selectable core material and a preparation process thereof

Abstract

The present application discloses a kind of multi-layer sheet selectable core material welding wire, the welding wire is composed of internal core material and the plate material of external multi-layer structure, the plate material is single element plate material or multi-element plate material, the single element plate material is made of one of stainless steel, aluminum and titanium, the multi-element plate material is composite metal plate and laminated plate, multi-element plate material is composed of two or more single element plate material, the core material is made of one or two or more material combinations of aluminum, titanium, copper, welding agent and polymer material.The multi-element welding wire of the present application will combine the advantages of metal powder and welding wire, while avoiding their disadvantages. It can provide flexibility and the ability to adjust the composition to meet different welding needs, and achieve complex element requirements through additive manufacturing technology. In addition, the development of new multi-element welding wire can also improve the utilization rate of welding materials, reduce costs, and improve the function and performance of welding connection.

Description

Technical Field

[0001] This invention relates to the field of welding materials technology, and in particular to a welding wire for a multilayer thin plate with optional core material and its preparation process. Background Technology

[0002] In the welding field, commonly used welding materials include metal powders and welding wires, each with its own advantages and limitations. Metal powders offer high flexibility, allowing for composition adjustments to meet diverse welding requirements. Through additive manufacturing technology, metal powders can be precisely controlled and complex element ratios can be constructed to satisfy specific application needs. However, the purity, particle size, uniformity, sphericity, and oxygen content of metal powders significantly impact the performance of the final printed product. Therefore, the powder preparation process requires highly precise control to ensure the desired performance and quality. Furthermore, due to the tiny particle size of metal powders, their storage and handling require specialized equipment and environmental control to prevent oxidation and moisture adsorption, increasing the complexity and cost of powder processing.

[0003] In contrast, welding wire requires no complex preparation process and can be used directly in welding operations, improving convenience and efficiency. Welders can perform welding operations quickly and accurately. Welding wire is suitable for various welding processes and equipment, exhibiting high versatility. However, welding wire typically only provides a single material property, making it difficult to meet complex and specialized welding needs. For some welding applications with special requirements, welding wire may not be able to provide the necessary performance and functionality.

[0004] Metal powders offer high flexibility and additive manufacturing capabilities, but require high powder quality and processing standards. Welding wires are easy to use and versatile, but have limitations in terms of material properties and utilization. In the research and development of welding, novel multi-component welding wires are currently a foreign technology in China. Therefore, there is an urgent need to develop a welding wire that combines the advantages of both metal powders and welding wires without their disadvantages. Summary of the Invention

[0005] The present invention aims to solve the problems existing in the prior art by providing a welding wire with optional core material for multilayer thin plates and its preparation process, which is applicable to the welding field and aims to meet different welding needs and provide a selection of welding materials with excellent performance.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a welding wire with optional core material for multi-layer thin plates, wherein the welding wire is composed of an inner core material and an outer multi-layer structure plate, wherein the plate is a single-element plate or a multi-element plate, wherein the single-element plate is made of one of stainless steel, aluminum and titanium, and the multi-element plate is a composite metal plate and a laminate, wherein the multi-element plate is composed of two or more single-element plates, and the core material is composed of one or more of aluminum, titanium, copper, welding agent and polymer materials.

[0007] Further improvements are made to the multi-layer structure, which is a circular cross-section formed by rolling multiple layers of sheet metal and core material together under continuous pressure and deformation.

[0008] To further improve the structure, the multi-layer structure needs to undergo stress-relieving heat treatment. The heat treatment process parameters are: treatment temperature 150-170 degrees Celsius, and holding time 30-60 minutes.

[0009] Further improvements include a preparation process for a welding wire with optional core material for multilayer thin plates, comprising the following steps:

[0010] (1) Select various metal plates and appropriate core materials according to welding requirements;

[0011] (2) Multiple metal sheets are stacked together in a hierarchical order to form a multi-layer structure;

[0012] (3) An appropriate core material can be embedded in the middle of the multi-layer board stack as needed;

[0013] (4) The multilayer sheet and core material are placed into a rolling mill for rolling processing. Through continuous pressure and deformation, the multilayer sheet and core material are tightly bonded together and formed into a circular cross section.

[0014] (5) During the rolling process, the diameter of the welding wire is gradually adjusted to meet the specific requirements.

[0015] Further improvements include a rolling mill comprising a support frame and four roll groups sequentially arranged on the support frame. The first roll group comprises a core material positioning roll and a plate positioning roll, wherein the core material positioning roll has a semi-circular groove and the plate positioning roll has a rectangular groove. The second roll group comprises a core material positioning roll and a lower plate forming roll. The third roll group comprises an upper plate positioning roll and a lower plate forming roll, wherein the upper plate positioning roll has two positioning grooves. The fourth roll group comprises an upper plate forming roll and a lower plate forming roll, wherein both the lower plate forming roll and the upper plate forming roll have bending forming grooves.

[0016] Further improvements include a dispensing machine, which is used to apply welding oil to joints with circular cross-sections to achieve a seal.

[0017] Further improvements include the addition of a first needle, which is located within a bending forming groove.

[0018] Further improvements include the addition of a second needle, the needle tip of which is located within a positioning groove.

[0019] To further improve the design, a turntable is rotatably mounted on the bracket. The turntable has several through holes distributed circumferentially, and cleaning cotton rings of different inner diameters are installed in the several through holes.

[0020] The beneficial effects of this invention are: the multi-element welding wire of this invention combines the advantages of metal powder and welding wire while avoiding their disadvantages. It provides flexibility and the ability to adjust the composition to meet different welding needs, and enables the construction of complex elemental requirements through additive manufacturing technology. Furthermore, the development of this novel multi-element welding wire can improve the utilization rate of welding materials, reduce costs, and enhance the functionality and performance of welded joints. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a three-layer board material proposed in this invention;

[0022] Figure 2 This is a global schematic diagram of a three-layer plate structure proposed in this invention;

[0023] Figure 3 This is a cross-sectional view of the preparation of welding wire according to the present invention;

[0024] Figure 4 This is a schematic diagram of the rolling mill structure;

[0025] Figure 5 This is a schematic diagram of the rolling process using four sets of rolls;

[0026] Explanation of reference numerals in the attached drawings: 1. Core material; 2. First sheet material; 3. Second sheet material; 4. Third sheet material; 5. Support; 6. Core material positioning roller; 7. Sheet material positioning roller; 8. Semi-circular groove; 9. Rectangular groove; 10. Lower forming roller of sheet material; 11. Upper positioning roller of sheet material; 12. Positioning groove; 13. Upper forming roller of sheet material; 14. Bending forming groove; 15. Dispensing machine; 16. First needle; 17. Turntable; 18. Cleaning cotton ring; 19. Second needle. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] The following embodiments are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.

[0029] See attached document Figure 1-3 This embodiment describes a welding wire with optional core material for multilayer thin plates. The welding wire consists of an inner core material and an outer multilayer structure of plates. Various suitable metal plates and core materials are selected to meet different welding requirements, ensuring that the welding material has the required chemical composition and physical properties. The following is a detailed description of the material selection; appropriate thin plates are selected from available metal materials according to the requirements of the welding project.

[0030] The plate has at least three layers, and the plate is a single-element plate or a multi-element plate. The single-element plate is made of one of stainless steel, aluminum and titanium.

[0031] Regarding corrosion resistance, for welding projects that need to be used in corrosive environments, choose thin metal sheets with good corrosion resistance, such as stainless steel and alloys. These materials can resist corrosion and oxidation, extending the service life of welding materials.

[0032] For welding projects requiring high thermal conductivity, choose thin metal sheets with high thermal conductivity, such as copper and aluminum. These materials can effectively transfer heat, improve welding efficiency, reduce thermal stress, and ensure the stability of the weld joint.

[0033] The multi-element sheet material is a composite metal sheet and a laminate. It consists of two or more single-element sheets, and the selected metal sheets should possess the required strength, hardness, corrosion resistance, and thermal conductivity. For welding projects requiring high strength, we select high-strength metal sheets, such as high-strength steel, alloys, and nickel alloys. These materials provide the necessary structural stability and rigidity, ensuring that the welded joint can withstand the expected load.

[0034] Depending on the welding process requirements, the machinability and weldability of the sheet metal must also be considered. These characteristics are crucial for subsequent processing and welding. Selecting sheet metal with good machinability ensures operability and quality stability during manufacturing and processing. Simultaneously, selecting sheet metal with good weldability ensures the reliability of the welded joint and the quality of the weld.

[0035] Core material is a material embedded in multiple layers of thin sheets to enhance specific properties of the welding wire. The appropriate core material is selected based on the requirements of the welding project. Core materials can be metallic or non-metallic. Metallic core materials are typically used to enhance the strength and thermal conductivity of the welding wire, while non-metallic core materials can be used to adjust the properties and microstructure of the welding material. Common metallic core materials include aluminum, titanium, and copper, while non-metallic core materials can be welding fluxes, polymer materials, etc. When selecting a core material, its electrical conductivity, strength, heat resistance, and compatibility with the thin metal sheet must be considered.

[0036] When implementing the multi-element welding wire preparation process, it is necessary to rationally proportion the thickness and ratio of various materials according to specific welding requirements and the properties of the selected metal sheets and core materials. The multi-layer structure is a circular cross-section formed by rolling multiple layers of sheet metal and core material together under continuous pressure and deformation. By adjusting the layer order and thickness of the metal sheets and core materials, the desired welding performance and characteristics can be achieved. For example, in welding projects requiring high strength, a thicker, high-strength metal sheet can be added, while a high-strength metal core material can be selected to enhance the overall strength of the welding material.

[0037] In the process of multilayer plate stacking, multiple thin metal sheets can be stacked together in a specific layer order to form a multilayer structure. The thickness and material combination of each layer can be adjusted according to specific needs to achieve the required welding performance and characteristics.

[0038] The material combination for each layer can be selected according to specific requirements. For example, thin plates of different materials can be stacked alternately, or the same material can be reused in certain layers to enhance a specific property. Simultaneously, the thickness of each thin plate can be controlled, and the thickness selection can be based on factors such as the characteristics of the welding material, the requirements of the weld joint, and stress distribution. Thicker thin plates can provide better strength and stability, while thinner thin plates can achieve higher thermal conductivity and heat dissipation.

[0039] Depending on the specific welding requirements and desired performance characteristics, different material combinations can be selected for each layer. For example, where high strength is required in a specific area, a higher-strength material can be used in that layer. Conversely, where good thermal conductivity is needed, a material with high thermal conductivity can be chosen.

[0040] A process for preparing welding wire with optional core material for multilayer thin plates includes the following steps:

[0041] (1) Select various metal plates and appropriate core materials according to welding requirements; the core material can be a metal or a non-metal material, used to enhance the specific properties of the welding wire, such as conductivity and strength. Common metal core materials include copper, aluminum, nickel, etc., while non-metal core materials can be welding flux, polymer materials, etc.

[0042] (2) Multiple metal sheets are stacked together in a hierarchical order to form a multi-layer structure. This multi-layer structure design can match the functions and performance of different areas according to requirements, providing a wider range of welding application options. In addition, by adjusting the thickness and material combination of each layer, more precise performance control and customized welding materials can be achieved.

[0043] (3) An appropriate core material can be embedded in the middle of the multi-layer board stack as needed; during the stacking of multi-layer boards, a core material can be embedded in the middle of the multi-layer structure according to specific needs. Select a suitable core material based on welding requirements and required performance characteristics.

[0044] (4) The multilayer sheet and core material are placed into a rolling mill for rolling processing. Through continuous pressure and deformation, the multilayer sheet and core material are tightly bonded together to form a circular cross-section. After the structure of the multilayer sheet and embedded core material is formed, rolling processing is required to transform it into a welding wire with a circular cross-section. The rolling process, through continuous pressure and deformation, tightly bonds the multilayer sheet and core material together to form the required shape and size.

[0045] (5) During the rolling process, the diameter of the welding wire is gradually adjusted to meet specific requirements. The rolling parameters are adjusted according to the required welding wire diameter and specific requirements. These parameters include rolling pressure, rolling speed, and rolling path. By reasonably adjusting these parameters, the diameter of the welding wire can be controlled, and the overall shape stability can be maintained.

[0046] The diameter of the welding wire can be adjusted through further rolling and stretching operations as needed. This can be achieved by adjusting the parameters of the rolling equipment. In addition, necessary surface treatments, such as rust removal and decontamination, are performed on the welding wire to improve welding quality and appearance. The multi-layer structure can also undergo stress-relieving heat treatment as needed, with the following process parameters: treatment temperature 150-170 degrees Celsius, holding time 30-60 minutes.

[0047] As attached Figure 4-5As shown, the rolling mill includes a support 5 and four roll groups arranged sequentially on the support 5. In addition, transition roll groups can be arranged between the four roll groups. The first roll group includes a core material positioning roll 6 and a sheet material positioning roll 7. The core material positioning roll 6 has a semi-circular groove 8 for positioning the core material. The sheet material positioning roll 7 has a rectangular groove 9 for positioning multi-layer sheets. The second roll group includes a core material positioning roll 6 and a lower sheet material forming roll 10. The lower sheet material forming roll 10 can bend multi-layer sheets into a U-shape. The third roll group includes an upper sheet material positioning roll 11 and a lower sheet material forming roll 10. The upper sheet material positioning roll 11 has two positioning grooves 12 for limiting the two sides of the U-shaped sheet material. The fourth roll group includes an upper sheet material forming roll 13 and a lower sheet material forming roll 10. Both the lower sheet material forming roll 10 and the upper sheet material forming roll 13 have bending forming grooves 14. The upper sheet material forming roll 13 can narrow the U-shaped sheet material, transforming it into a circular cross-section.

[0048] Through the aforementioned rolling process, the structure of multilayer sheet metal and embedded core material can be transformed into a circular cross-section welding wire. The continuous pressure and deformation during rolling ensure a tight bond between the multilayer structure and maintain the shape and dimensional stability of the welding wire. By adjusting the rolling parameters, specific welding wire diameter requirements can be met. Furthermore, appropriate surface treatment can further improve the quality and performance of the welding wire. The process of this invention tightly bonds the multilayer sheet metal and core material structure together to form a circular welding wire. This rolling process enables the multilayer structure to achieve the desired welding performance and characteristics and provides a selection of welding materials with excellent properties.

[0049] It also includes a dispensing machine 15, which is used to apply welding oil to the joint of the circular cross-section to achieve a seal, providing moisture protection and oxidation resistance, and improving the quality of the weld. The dispensing machine 15 includes a first needle 16, which is located in the bending forming groove 14. The first needle 16 is used to inject welding oil into the bending forming groove 14, and the oil is transferred to the joint of the circular cross-section when the upper part of the bending forming groove 14 is closed.

[0050] The dispensing machine 15 includes a second needle 19, the needle tip of which is located within the positioning groove 12. The second needle 19 is used to inject welding oil into the positioning groove 12, and to apply welding oil to the edges of the U-shaped plate as it passes over both sides.

[0051] A turntable 17 is rotatably mounted on the support 5. The turntable 17 has several through holes distributed circumferentially. Cleaning cotton rings 18 with different inner diameters are installed on the several through holes. When the rolled welding wire passes through the cleaning cotton rings 18, it can be cleaned. Welding oil can be evenly applied to the surface of the welding wire to form a protective film, which improves the life of the welding wire. By rotating the turntable 17, a cleaning cotton ring 18 with a suitable inner diameter can be selected for use, which can accommodate welding wires of different sizes.

[0052] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art will understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A welding wire for multilayer thin plates with optional core material, characterized in that: The welding wire consists of an inner core material and an outer multi-layered plate structure. The plate material can be a single-element plate or a multi-element plate. The single-element plate is made of one of stainless steel, aluminum, and titanium. The multi-element plate is a composite metal plate and a laminate, and is composed of two or more single-element plates. The core material is made of one or more of aluminum, titanium, copper, welding flux, and polymer materials. The multi-layered structure is a circular cross-section formed by rolling the multi-layered plate and core material together under continuous pressure and deformation. The multi-layered structure requires stress-relieving heat treatment. The heat treatment process parameters are: treatment temperature 150-170 degrees Celsius, holding time 30-60 minutes.

2. A process for preparing welding wire with optional core material for multilayer thin plates, characterized in that: The steps include the following: Select a variety of metal sheets and appropriate core materials according to welding requirements; Multiple metal sheets are stacked together in a hierarchical order to form a multi-layered structure; An appropriate core material can be embedded in the middle of the multi-layer board stack, depending on the requirements; Multilayer sheets and core materials are placed into a rolling mill for rolling processing. The rolling mill includes a support (5) and four roll groups arranged sequentially on the support (5). The first roll group includes a core material positioning roll (6) and a sheet material positioning roll (7). The core material positioning roll (6) has a semi-circular groove (8), and the sheet material positioning roll (7) has a rectangular groove (9). The second roll group includes a core material positioning roll (6) and a lower sheet material forming roll (10). The third roll group includes an upper sheet material positioning roll. Roller (11) and lower forming roller (10) of the plate, the upper positioning roller (11) of the plate is provided with two positioning grooves (12), the fourth roller group includes upper forming roller (13) of the plate and lower forming roller (10) of the plate, the lower forming roller (10) and the upper forming roller (13) of the plate are both provided with bending forming grooves (14), by applying continuous pressure and deformation through the rolling mill, the multilayer plate and core material are tightly bonded together and formed into a circular cross section; During the rolling process, the diameter of the welding wire is gradually adjusted to meet specific requirements.

3. The preparation process of welding wire for optional core material of multilayer thin plates according to claim 2, characterized in that: It also includes a dispensing machine (15), which is used to apply welding oil to the joint of a circular cross section to achieve a seal.

4. The preparation process of a welding wire for a multilayer thin plate with optional core material according to claim 3, characterized in that: The dispensing machine (15) includes a first needle (16) located in a bending forming groove (14).

5. The preparation process of a welding wire for a multilayer thin plate with optional core material according to claim 4, characterized in that: The dispensing machine (15) includes a second needle (19), the needle opening of which is located in the positioning groove (12).

6. The preparation process of welding wire for optional core material of multilayer thin plates according to claim 5, characterized in that: A turntable (17) is rotatably mounted on the bracket (5). Several through holes are distributed circumferentially on the turntable (17), and cleaning cotton rings (18) with different inner diameters are installed on the several through holes.

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