Multi-layer composite steel strip flux-cored wire forming device

Abstract

The invention provides a multi-layer composite steel strip flux-cored wire forming device, and relates to the field of welding wire forming. The second adjusting hand wheel is rotationally connected to the left upper portion of the welding wire forming machine body. The second height adjusting base is slidably connected to the upper portion of the welding wire forming machine body. The edge folding pressing assembly is arranged on the upper portion of the left side of the welding wire forming machine body. The number of the swing roller seats is two, and the two swing roller seats are rotationally connected to the interior of the second height adjusting seat. The two edge folding rollers are rotationally connected to the interiors of the two swing roller seats respectively; the second lower roller is rotationally connected to the upper portion of the welding wire forming machine body. The edge folding angle adjusting assembly is arranged in the second height adjusting base. The steel strip forming precision can be guaranteed, the welding wire forming yield is increased, the service life of the welding wire in a humid and high-corrosion environment is prolonged, and the problems that the steel strips are prone to deflection, the product percent of pass is affected, and the protection performance of a formed surface layer to the interior of the welding wire is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wire forming, and particularly to a forming device for multi-layer composite steel strip flux-cored wire. Background Art

[0002] The steel strip flux-cored wire refers to using a steel strip as the base material, pressing the steel strip into a U-shaped structure, filling the U-shaped steel strip with powder, then rolling and seaming, and finally drawing and reducing the diameter to form a wire. In order to meet the actual needs and construction environment requirements, multi-layer steel strips are used. First, they are processed into multi-layer composite steel strips and then formed into wires.

[0003] In actual production, during the forming process of multi-layer steel strips, skew or position changes are likely to occur between the steel strips, resulting in incomplete alignment between the layers of the formed steel strips, size deviation of the steel strips, affecting wire forming and the product qualification rate. At the same time, the surface layer may not completely cover other steel strip layers, affecting the protection performance of the surface layer on the inside of the wire after forming. Summary of the Invention

[0004] The embodiment of the present invention relates to a forming device for multi-layer composite steel strip flux-cored wire, which can ensure the forming accuracy of the steel strip, improve the qualified rate of wire forming, and at the same time ensure that the surface layer completely covers the outer surface of the wire, maximizing the protective effect of the surface layer, maximizing the moisture-proof, anti-oxidation and wear-resistant properties of the surface layer, and improving the service life of the wire in humid and highly corrosive environments.

[0005] In the first aspect of the present invention, a forming device for multi-layer composite steel strip flux-cored wire is provided, specifically including: the main body of the wire forming machine; On the upper left side of the main body of the wire forming machine, a surface layer reel, a multi-layer reel, and a base layer reel are rotatably connected in sequence. A surface layer strip is wound on the surface layer reel, a multi-layer strip is wound on the multi-layer reel, and a base layer strip is wound on the base layer reel; The first forming seat is slidably connected to the upper left side of the main body of the wire forming machine; The first forming upper roller is rotatably connected to the bottom of the first forming seat; The first forming lower roller is rotatably connected to the left side of the main body of the wire forming machine, and the first forming upper roller is directly above the first forming lower roller; The first forming assembly is arranged on the upper left side of the main body of the wire forming machine; The second adjusting handwheel is rotatably connected to the upper left side of the main body of the wire forming machine; The second height adjusting seat is slidably connected to the upper part of the main body of the wire forming machine; The hemming and pressing assembly is arranged at the upper left side of the main body of the wire forming machine, and the hemming and pressing assembly is located on the right side of the first forming assembly; The swing roller seat, there are two swing roller seats in total, and the two swing roller seats are rotatably connected inside the second height adjustment seat; The hemming rollers, there are two hemming rollers in total, and the two hemming rollers are respectively rotatably connected inside the two swing roller seats; The second lower roller is rotatably connected to the upper part of the main body of the wire forming machine, and the second lower roller is located at the middle position directly below the two hemming rollers; The hemming angle adjustment assembly is arranged inside the second height adjustment seat; The compaction transmission assembly is arranged on the upper part of the main body of the wire forming machine, and the compaction transmission assembly is located on the right side of the hemming transmission assembly.

[0006] In at least some embodiments, the first forming assembly includes: The first adjustment screw rod is threadedly connected to the upper left side of the main body of the wire forming machine, and the first adjustment screw rod is rotatably connected to the top of the first forming seat.

[0007] In at least some embodiments, the width of the first forming upper roller is equal to the width of the composite layer belt and the base layer belt; the outer circumferential surface of the first forming lower roller is a groove structure, and the width of the groove a = b + 2×1.5h (where b is the width of the composite layer belt and the base layer belt, and h is the thickness of the surface layer belt), and the root of the groove is a rounded corner structure.

[0008] In at least some embodiments, the hemming and pressing assembly includes: The second adjustment driving bevel gears, there are two second adjustment driving bevel gears in total, and the two second adjustment driving bevel gears are coaxially and fixedly connected to the rear of the second adjustment handwheel; The second adjustment screw rods, there are two groups of second adjustment screw rods in total, and the two groups of second adjustment screw rods are rotatably connected to the inner side of the upper part of the main body of the wire forming machine; The second adjustment driven bevel gears are coaxially and fixedly connected to the top of the second adjustment screw rods. The second adjustment driving bevel gear and the second adjustment driven bevel gear on the same side are engaged to jointly form a bevel gear transmission mechanism. The two second adjustment screw rods are simultaneously threadedly driven and connected to the front and rear sides of the second height adjustment seat, and the second height adjustment seat and the second adjustment screw rod form a threaded transmission mechanism.

[0009] In at least some embodiments, the hemming angle adjustment assembly includes: The angle adjustment handle is rotatably connected to the left end face of the second height adjustment seat; The angle-adjusting driving bevel gear is coaxially and fixedly connected to the right side of the angle-adjusting handle; The angle-adjusting screw rod is rotatably connected inside the second height-adjusting seat; The angle-adjusting driven bevel gear is coaxially and fixedly connected to the top of the angle-adjusting screw rod. The angle-adjusting driving bevel gear and the angle-adjusting driven bevel gear are engaged to jointly form a bevel gear transmission mechanism.

[0010] In at least some embodiments, the hemming angle-adjusting assembly includes: The angle-adjusting sliding seat is slidably connected inside the second height-adjusting seat. The angle-adjusting screw rod and the angle-adjusting sliding seat are engaged to jointly form a lead screw-nut transmission mechanism; The angle-adjusting connecting rod is hinged to the front and rear sides of the angle-adjusting sliding seat. The other end of the angle-adjusting connecting rod is hinged to the swinging roller seat on the same side. The angle-adjusting sliding seat, the angle-adjusting connecting rod, the swinging roller seat and the main body of the wire forming machine jointly form a crank-slider transmission mechanism.

[0011] In at least some embodiments, the compaction transmission assembly includes: The third adjusting screw rod is threadedly connected to the upper part of the main body of the wire forming machine; The third adjusting seat is slidably connected to the upper part of the main body of the wire forming machine. The third adjusting screw rod is rotatably connected to the third adjusting seat; The third upper roller is rotatably connected to the bottom of the third adjusting seat; The third lower roller is rotatably connected to the upper part of the main body of the wire forming machine. The third lower roller is located below the third upper roller.

[0012] In at least some embodiments, a groove is formed on the outer circumferential surface of the third upper roller. The width a of the groove is b + 2×1.5h (where b is the width of the cladding strip and the base strip, and h is the thickness of the surface layer strip), and the root part of the groove is a rounded corner structure.

[0013] The present invention provides a multi-layer composite steel strip flux-cored wire forming device, which has the following beneficial effects: By widening the width of the surface layer strip and hemming and extruding both sides to form a steel strip structure in which the surface layer strip covers the cladding strip and the base strip, the present invention effectively avoids the skew between the surface layer strip, the cladding strip and the base strip during the forming process. After forming the wire, it can ensure that the surface layer completely covers the outer surface of the wire, maximizing the protective effect of the surface layer, maximizing the moisture-proof, antioxidant and wear-resistant properties of the surface layer strip, and improving the service life of the wire in humid and highly corrosive environments.

[0014] During the forming process of the present invention, the first forming lower roller and the third upper roller with groove structures and the hemming roller with adjustable angle are adopted, which can effectively control the size of the steel strip after forming, provide high-precision blanks for subsequent processes of filling powder, rolling seams and drawing and reducing diameter, and reduce the rejection rate caused by size deviation.

[0015] By arranging a fillet structure in the groove, the present invention effectively avoids the cracking of the corners of the steel strip, ensures the quality of the formed composite steel strip, and facilitates the forming and processing of the welding wire.

[0016] The present invention can ensure the forming accuracy of the steel strip, improve the qualified rate of the welding wire forming, and at the same time ensure that the surface layer completely covers the outer surface of the welding wire, maximize the protective effect of the surface layer, maximize the moisture-proof, antioxidant and wear-resistant properties of the surface layer, and improve the service life of the welding wire in humid and highly corrosive environments. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0018] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0019] In the drawings: Figure 1 A schematic diagram showing the overall structure of the present invention is shown; Figure 2 A schematic diagram showing the structure of the steel strip forming part of the present invention is shown; Figure 3 A schematic diagram showing the structure of the first forming assembly of the present invention is shown; Figure 4 A schematic diagram showing the processing cross-sectional structure of the first forming upper roller and the first forming lower roller of the present invention is shown; Figure 5 A schematic diagram showing the structure of the hemming and pressing assembly of the present invention is shown; Figure 6 A schematic diagram showing the left side structure of the hemming and pressing assembly of the present invention is shown; Figure 7 A schematic diagram showing the structure of the hemming angle adjusting assembly of the present invention is shown; Figure 8 A schematic diagram showing the processing cross-sectional structure of the hemming roller of the present invention is shown; Figure 9 A schematic diagram showing the structure of the compaction transmission assembly of the present invention is shown; Figure 10 A schematic diagram showing the processing cross-sectional structure of the compaction transmission assembly of the present invention is shown; List of Reference Numerals 1. Main body of wire forming machine; 2. Surface layer winding wheel; 3. Clad layer winding wheel; 4. Base layer winding wheel; 5. First forming seat; 6. First upper forming roller; 7. First lower forming roller; 8. First adjusting screw; 9. Second adjusting handwheel; 901. Second driving bevel gear for adjustment; 10. Second adjusting screw; 1001. Second driven bevel gear for adjustment; 11. Second height adjusting seat; 12. Angle adjusting handle; 1201. Angle driving bevel gear for adjustment; 13. Angle adjusting screw; 1301. Angle driven bevel gear for adjustment; 14. Angle adjusting sliding seat; 15. Angle adjusting connecting rod; 16. Swing roller seat; 17. Flanging roller; 18. Second lower roller; 19. Third adjusting seat; 20. Third upper roller; 21. Third lower roller; 22. Third adjusting screw; 23. Surface layer belt; 24. Clad layer belt; 25. Base layer belt. Detailed implementation mode

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0021] Embodiment 1: Please refer to Figures 1 to 10 : The present invention provides a multi-layer composite steel strip flux-cored wire forming device, including: main body 1 of wire forming machine; On the upper left side of the main body 1 of the wire forming machine, a surface layer winding wheel 2, a clad layer winding wheel 3, and a base layer winding wheel 4 are rotatably connected in sequence. A surface layer belt 23 is wound on the surface layer winding wheel 2, a clad layer belt 24 is wound on the clad layer winding wheel 3, and a base layer belt 25 is wound on the base layer winding wheel 4; First forming seat 5, the first forming seat 5 is slidably connected to the upper left side of the main body 1 of the wire forming machine; First upper forming roller 6, the first upper forming roller 6 is rotatably connected to the bottom of the first forming seat 5; First lower forming roller 7, the first lower forming roller 7 is rotatably connected to the left side of the main body 1 of the wire forming machine, and the first upper forming roller 6 is directly above the first lower forming roller 7; First forming assembly, the first forming assembly is arranged on the upper left side of the main body 1 of the wire forming machine; Second adjusting handwheel 9, the second adjusting handwheel 9 is rotatably connected to the upper left side of the main body 1 of the wire forming machine; Second height adjusting seat 11, the second height adjusting seat 11 is slidably connected to the upper part of the main body 1 of the wire forming machine; The hemming and pressing assembly is arranged at the upper left side of the main body 1 of the wire forming machine, and the hemming and pressing assembly is located on the right side of the first forming assembly; The swing roller seat 16, and there are two swing roller seats 16 in total. The two swing roller seats 16 are rotatably connected inside the second height adjustment seat 11; The hemming rollers 17, and there are two hemming rollers 17 in total. The two hemming rollers 17 are respectively rotatably connected inside the two swing roller seats 16; The second lower roller 18 is rotatably connected to the upper part of the main body 1 of the wire forming machine. The second lower roller 18 is located at the middle position directly below the two hemming rollers 17. The hemming of the surface layer belt 23 is extruded and bent by the two hemming rollers 17; The hemming angle adjustment assembly is arranged inside the second height adjustment seat 11; The compaction transmission assembly is arranged at the upper part of the main body 1 of the wire forming machine, and the compaction transmission assembly is located on the right side of the hemming transmission assembly.

[0022] In the embodiment of the present invention, as Figure 3 shown, the first forming assembly includes: The first adjusting screw 8 is threadedly connected to the upper left side of the main body 1 of the wire forming machine. The first adjusting screw 8 is rotatably connected to the top of the first forming seat 5; In use, by rotating the first adjusting screw 8, the first adjusting screw 8 drives the first forming seat 5 to slide up and down through the threaded transmission structure, adjusting the distance between the first forming upper roller 6 and the first forming lower roller 7, facilitating the threading operation of the steel belt, and at the same time facilitating the adjustment of the pressure between the first forming upper roller 6 and the first forming lower roller 7.

[0023] In the embodiment of the present invention, as Figure 4 shown, the width of the first forming upper roller 6 is equal to the width of the cladding belt 24 and the base belt 25; The outer circumferential surface of the first forming lower roller 7 is a groove structure, and the width of the groove a = b + 2×1.5h (where b is the width of the cladding belt 24 and the base belt 25, and h is the thickness of the surface layer belt 23). The root of the groove is a rounded corner structure, effectively avoiding damage during the bending of the surface layer belt 23. In use, when the first forming upper roller 6 and the first forming lower roller 7 extrude the three-layer steel belt, the first forming upper roller 6 extrudes the three-layer steel belt into the groove of the first forming lower roller 7, and the surface layer belt 23 bends upward and wraps around the outside of the cladding belt 24 and the base belt 25.

[0024] In the embodiment of the present invention, as Figure 5 shown, the hemming and pressing assembly includes: The second adjusting driving bevel gear 901, there are two pieces of the second adjusting driving bevel gear 901, and the two pieces of the second adjusting driving bevel gear 901 are coaxially and fixedly connected to the rear of the second adjusting handwheel 9; The second adjusting screw rod 10, there are two groups of the second adjusting screw rod 10, and the two groups of the second adjusting screw rod 10 are rotatably connected to the inner side of the upper part of the wire forming machine main body 1; The second adjusting driven bevel gear 1001, the second adjusting driven bevel gear 1001 is coaxially and fixedly connected to the top of the second adjusting screw rod 10, the second adjusting driving bevel gear 901 on the same side and the second adjusting driven bevel gear 1001 are meshed to jointly form a bevel gear transmission mechanism, and the two second adjusting screw rods 10 are simultaneously in threaded transmission connection with the front and rear sides of the second height adjusting seat 11, and the second height adjusting seat 11 and the second adjusting screw rod 10 form a threaded transmission mechanism. In use, when the second adjusting handwheel 9 is rotated, the second adjusting handwheel 9 drives the two second adjusting screw rods 10 to rotate simultaneously through the bevel gear transmission mechanism jointly constituted by the second adjusting driving bevel gear 901 and the second adjusting driven bevel gear 1001, and the second adjusting screw rod 10 drives the second height adjusting seat 11 to slide up and down through the threaded transmission mechanism constituted by the second height adjusting seat 11 and the second adjusting screw rod 10, which is convenient for the operation of threading the steel strip and adjusting the pressing force.

[0025] In the embodiment of the present invention, as Figure 7 shown, the hemming angle adjusting assembly includes: The angle adjusting handle 12, the angle adjusting handle 12 is rotatably connected to the left end face of the second height adjusting seat 11; The angle adjusting driving bevel gear 1201, the angle adjusting driving bevel gear 1201 is coaxially and fixedly connected to the right side of the angle adjusting handle 12; The angle adjusting screw rod 13, the angle adjusting screw rod 13 is rotatably connected inside the second height adjusting seat 11; The angle adjusting driven bevel gear 1301, the angle adjusting driven bevel gear 1301 is coaxially and fixedly connected to the top of the angle adjusting screw rod 13, and the angle adjusting driving bevel gear 1201 and the angle adjusting driven bevel gear 1301 are meshed to jointly form a bevel gear transmission mechanism. In use, when the angle adjusting handle 12 is rotated, the angle adjusting handle 12 drives the angle adjusting screw rod 13 to rotate through the bevel gear transmission mechanism jointly constituted by the angle adjusting driving bevel gear 1201 and the angle adjusting driven bevel gear 1301.

[0026] In the embodiment of the present invention, as Figure 7 and Figure 8 shown, the hemming angle adjusting assembly includes: The angle adjusting sliding seat 14, the angle adjusting sliding seat 14 is slidably connected inside the second height adjusting seat 11, and the angle adjusting screw rod 13 and the angle adjusting sliding seat 14 are meshed to jointly form a lead screw-nut transmission mechanism; The angle adjustment link 15 is hinged to the front and rear sides of the angle adjustment sliding seat 14. The other end of the angle adjustment link 15 is hinged to the swing roller seat 16 on the same side. The angle adjustment sliding seat 14, the angle adjustment link 15, the swing roller seat 16 and the main body 1 of the wire forming machine together constitute a crank-slider transmission mechanism. During use, when the angle adjustment screw 13 rotates, the angle adjustment screw 13 drives the angle adjustment sliding seat 14 to slide up and down through a screw-nut transmission mechanism. The angle adjustment sliding seat 14 drives the swing roller seat 16 to swing through the crank-slider transmission mechanism composed of the angle adjustment sliding seat 14, the angle adjustment link 15, the swing roller seat 16 and the main body 1 of the wire forming machine, thereby adjusting the installation angle of the hemming roller 17 to meet the extrusion deformation of the surface layer belt 23 bent at different angles. At the same time, the width of the steel belt after bending can be ensured by adjusting the angle and height of the hemming roller 17.

[0027] In the embodiment of the present invention, as Figure 7 shown, the compaction transmission component includes: The third adjustment screw 22 is threadedly connected to the upper part of the main body 1 of the wire forming machine; The third adjustment seat 19 is slidably connected to the upper part of the main body 1 of the wire forming machine, and the third adjustment screw 22 is rotatably connected to the third adjustment seat 19; The third upper roller 20 is rotatably connected to the bottom of the third adjustment seat 19; The third lower roller 21 is rotatably connected to the upper part of the main body 1 of the wire forming machine. The third lower roller 21 is located below the third upper roller 20. During use, when the third adjustment screw 22 rotates, the third adjustment screw 22 drives the third adjustment seat 19 to slide up and down through a threaded transmission, which is convenient for the steel belt to penetrate, and at the same time, the extrusion thickness and extrusion force can be adjusted.

[0028] In the embodiment of the present invention, as Figure 10 shown, a groove is provided on the outer circumferential surface of the third upper roller 20. The width a of the groove = b + 2×1.5h (where b is the width of the cladding belt 24 and the base belt 25, and h is the thickness of the surface layer belt 23). The root part of the groove is a rounded corner structure. During use, the steel belt is shaped by the extrusion of the third upper roller 20, and at the same time, the width of the steel belt after extrusion is ensured by the groove, and the rounded corner structure avoids the extrusion damage of the edges and corners of the steel belt.

[0029] The working principle of this embodiment: The steel strip is composed of three layers: the surface layer strip 23, the cladding layer strip 24, and the base layer strip 25. Among them, the widths of the cladding layer strip 24 and the base layer strip 25 are equal, both being b, the width of the surface layer strip 23 is c, and the sum of the thicknesses of the cladding layer strip 24 and the base layer strip 25 is l, so c = b + 4l. During processing, first, the surface layer strip 23, the cladding layer strip 24, and the base layer strip 25 are extruded and formed by the first forming upper roller 6 and the first forming lower roller 7. The first forming upper roller 6 extrudes the three-layer steel strip into the groove of the first forming lower roller 7, and the surface layer strip 23 bends upward and wraps around the outside of the cladding layer strip 24 and the base layer strip 25. Then, the hemming roller 17 and the second lower roller 18 extrude the steel strip. The hemming roller 17 extrudes the bent part inward, making the bent part form a shape inclined inward. Then, the third upper roller 20 and the third lower roller 21 extrude the steel strip. Through the extrusion of the third upper roller 20, the steel strip is shaped, and at the same time, the width of the extruded steel strip is ensured through the groove. Then the main body 1 of the wire forming machine extrudes the steel strip into a U shape, then fills it with powder, rolls and seams, and finally draws and reduces the diameter to form the required welding wire. The finally formed welding wire consists of the surface layer, the cladding layer, the base layer, and the flux core from the outside to the inside. During this process, the offset between the surface layer strip 23, the cladding layer strip 24, and the base layer strip 25 can be effectively avoided, ensuring that the surface layer can fully wrap the cladding layer and the base layer, and ensuring the protection ability of the welding wire.

[0030] In this article, the following points need to be noted: 1. The attached drawings of the embodiments of the present invention only involve the structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0031] 2. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0032] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A multi-layer composite steel strip flux-cored welding wire forming device, characterized in that: include: A welding wire forming machine body (1); a surface reel (2), a composite reel (3), and a base reel (4) are arranged and rotatably connected at the upper left side of the welding wire forming machine body (1); A first forming seat (5), the first forming seat (5) being slidably connected to the upper left side of the welding wire forming machine body (1); A first upper forming roller (6), the first upper forming roller (6) being rotatably connected to the bottom of the first forming seat (5); a first lower forming roller (7), the first lower forming roller (7) being rotatably connected to the left side of the welding wire forming machine body (1), and the first upper forming roller (6) being located directly above the first lower forming roller (7); A first forming assembly, the first forming assembly being arranged on the upper left side of a welding wire forming machine body (1); a second adjusting hand wheel (9), the second adjusting hand wheel (9) being rotatably connected to the upper left side of the welding wire forming machine body (1); A second height adjustment seat (11), the second height adjustment seat (11) being slidably connected to the upper part of the welding wire forming machine body (1); A folding and pressing assembly, the folding and pressing assembly being arranged on the upper left side of the welding wire forming machine body (1), and the folding and pressing assembly being located on the right side of the first forming assembly; A swing roller seat (16), wherein the swing roller seat (16) is provided with two pieces in total, and the two swing roller seats (16) are rotatably connected inside the second height adjustment seat (11); A folding roller (17), wherein the folding roller (17) is provided with two pieces in total, and the two folding rollers (17) are rotatably connected to the inside of the two swinging roller seats (16) respectively; a second lower roller (18), the second lower roller (18) being rotatably connected to the upper part of the welding wire forming machine body (1), the second lower roller (18) being located in the middle position directly below the two folding rollers (17); A folding angle adjustment component, wherein the folding angle adjustment component is arranged inside the second height adjustment seat (11); A compaction transmission assembly is arranged on the upper part of the welding wire forming machine body (1), and the compaction transmission assembly is located on the right side of the folding transmission assembly.

2. The multi-layer composite steel strip flux-cored welding wire forming device according to claim 1, characterized in that: The first molding component comprises: A first adjusting screw (8), wherein the first adjusting screw (8) is threadedly connected to the upper left portion of the welding wire forming machine body (1), and the first adjusting screw (8) is rotatably connected to the top of the first forming seat (5).

3. The multi-layer composite steel strip flux-cored welding wire forming device according to claim 1, characterized in that: The width of the first upper forming roller (6) is equal to the width of the composite belt (24) and the base belt (25); the outer circumferential surface of the first lower forming roller (7) is a groove structure, the groove width a is the width b of the composite belt (24) and the base belt (25) plus twice the bending allowance (1.5h) of the surface belt (23), where h is the thickness of the surface belt and 1.5h is the single-side extension during bending, and the root of the groove is a rounded structure.

4. The multi-layer composite steel strip flux-cored welding wire forming device according to claim 1, characterized in that: The folding and pressing assembly comprises: A second adjusting active bevel gear (901), wherein the second adjusting active bevel gear (901) is provided with two pieces in total, and the two second adjusting active bevel gears (901) are coaxially fixedly connected to the rear of the second adjusting hand wheel (9); A second adjusting screw (10), wherein two groups of the second adjusting screw (10) are provided, and the two groups of the second adjusting screw (10) are rotatably connected to the inner side of the upper part of the welding wire forming machine body (1); The second adjusting driven bevel gear (1001) is coaxially fixedly connected to the top of the second adjusting screw (10); the second adjusting active bevel gear (901) on the same side meshes with the second adjusting driven bevel gear (1001) to form a bevel gear transmission mechanism; the two second adjusting screws (10) are simultaneously threadedly connected to the front and rear sides of the second height adjusting seat (11); the second height adjusting seat (11) and the second adjusting screw (10) form a threaded transmission mechanism.

5. The multi-layer composite steel strip flux-cored welding wire forming device according to claim 1, characterized in that: The folding angle adjustment component includes: An angle adjustment handle (12), the angle adjustment handle (12) being rotatably connected to a left end surface of the second height adjustment seat (11); An angle adjustment active bevel gear (1201), the angle adjustment active bevel gear (1201) being coaxially fixedly connected to the right side of the angle adjustment handle (12); An angle adjustment screw (13), the angle adjustment screw (13) being rotatably connected inside the second height adjustment seat (11); The angle adjustment driven bevel gear (1301) is coaxially fixedly connected to the top of the angle adjustment screw (13), and the angle adjustment active bevel gear (1201) is meshed with the angle adjustment driven bevel gear (1301) to form a bevel gear transmission mechanism.

6. The multi-layer composite steel strip flux-cored welding wire forming device according to claim 5, characterized in that: The folding angle adjustment component includes: An angle adjustment sliding seat (14), the angle adjustment sliding seat (14) is slidably connected inside the second height adjustment seat (11), and the angle adjustment screw (13) is meshed with the angle adjustment sliding seat (14) to form a screw nut transmission mechanism; An angle adjustment connecting rod (15) is hingedly connected to the front and rear sides of the angle adjustment sliding seat (14); the other end of the angle adjustment connecting rod (15) is hingedly connected to the swing roller seat (16) on the same side; the angle adjustment sliding seat (14), the angle adjustment connecting rod (15), the swing roller seat (16) and the welding wire forming machine body (1) together form a crank slider transmission mechanism.

7. The multi-layer composite steel strip flux-cored welding wire forming device according to claim 1, characterized in that: The compaction transmission assembly comprises: A third adjusting screw (22), the third adjusting screw (22) being threadedly connected to an upper portion of the welding wire forming machine body (1); A third adjustment seat (19), the third adjustment seat (19) being slidably connected to the upper part of the welding wire forming machine body (1), and a third adjustment screw (22) being rotationally connected to the third adjustment seat (19); A third upper roller (20), the third upper roller (20) being rotatably connected to the bottom of the third adjustment seat (19); A third lower roller (21), wherein the third lower roller (21) is rotatably connected to the upper part of the welding wire forming machine body (1), and the third lower roller (21) is located below the third upper roller (20).

8. The multi-layer composite steel strip flux-cored welding wire forming device according to claim 7, characterized in that: The outer circumferential surface of the third upper roller (20) is provided with a groove, the groove width a=b+2X1.5h (wherein b is the width of the composite belt (24) and the base belt (25), and h is the thickness of the surface belt (23)), and the root portion of the groove has a rounded corner structure.

9. The processing technology of the multi-layer composite steel strip flux-cored welding wire forming device according to claim 1 is characterized in that: A. Material preparation: The steel strip is composed of three layers: a surface strip (23), a composite strip (24), and a base strip (25). The widths of the composite strip (24) and the base strip (25) are equal, and the widths of the composite strip (24) and the base strip (25) are b. The width of the surface strip (23) is c. The sum of the thicknesses of the composite strip (24) and the base strip (25) is l, and c=b+4l. The surface strip (23), composite strip (24), and base strip (25) that meet the requirements are customized. B. The surface layer belt (23), the multi-layer belt (24) and the base layer belt (25) are extruded by a first forming upper roller (6) and a first forming lower roller (7). The first forming upper roller (6) extrude the three-layer steel belt into the groove of the first forming lower roller (7), and the surface layer belt (23) is bent upward and wrapped around the outer sides of the multi-layer belt (24) and the base layer belt (25); C. The folding roller (17) and the second lower roller (18) squeeze the steel strip, and the folding roller (17) squeezes the bent portion inward, so that the bent portion forms a shape inclined inward; D. The third upper roller (20) and the third lower roller (21) extrude the steel strip, and the steel strip is shaped by the extrusion of the third upper roller (20), while the width of the steel strip after extrusion is ensured by the grooves; E. The welding wire forming machine body (1) extrude the steel strip into a U-shape, then fill it with powder, roll it to close the seam, and then draw it to reduce the diameter to finally form the required welding wire.

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