Flux-cored wire seamless welding equipment and process

Abstract

The present invention relates to a seamless welding device for flux-cored welding wire, comprising a positioning welding structure, the positioning welding structure comprising a bracket, a feeding structure, a positioning guide structure, a welding structure, and a discharging structure, wherein the feeding structure, the positioning guide structure, the welding structure, and the discharging structure are sequentially installed on the bracket according to the feeding direction; the positioning guide structure comprises a positioning frame, a limit assembly, a positioning assembly, and a transmission assembly, the positioning assembly comprises a guide wheel, a rotating shaft, and a bracket seat, a positioning sharp ring is provided on the outer circumferential surface of the guide wheel, and the tip of the positioning sharp ring is arranged in the unwelded seal of the welding wire; the welding structure is installed on the positioning frame, and the welding head of the welding structure is in the same straight line with the positioning sharp ring, and can move with the movement of the positioning frame. The present invention ensures that the welding head of the welding structure is always in the position to be welded by installing the welding structure on the positioning frame, and the welding head of the welding structure 1 is in the same straight line with the positioning sharp ring 6, and can move with the movement of the positioning frame, so as to ensure that the welding of the welding wire is completed.

Description

Technical Field

[0001] The invention belongs to the technical field of flux-cored welding wires, in particular to a seamless welding device and process for flux-cored welding wires. Background Art

[0002] Flux-cored welding welds are mainly welded by high-frequency welding, argon arc welding, laser welding and other welding methods. Flux-cored welding welds will swing left and right, causing the following effects: the position of the weld cannot be accurately found, and the weld is prone to leaks during the welding process. The main reason for the swing is that irregular stress is generated during the deformation of the steel strip rolled steel pipe, causing the weld formed by the steel pipe to swing irregularly left and right during the welding process.

[0003] If the weld of seamless flux-cored welding wire is not tight or solid, on the one hand, the powder will easily absorb water molecules in the air, causing an increase in the content of diffused hydrogen and even welding cracks; on the other hand, it will also have a great impact on the subsequent copper plating process of the seamless flux-cored welding wire.

[0004] To solve the above problems, optical tracking welding is currently mainly used, but it has high cost, large error, poor accuracy, and cannot meet the current flux-cored wire welding weld requirements. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a flux-cored wire seamless welding device and process, which can solve the above-mentioned problems in the prior art.

[0006] A flux-cored wire seamless welding device, comprising a positioning welding structure,

[0007] The positioning welding structure includes a bracket, a feeding structure, a positioning guide structure, a welding structure, and a discharging structure. The feeding structure, the positioning guide structure, the welding structure, and the discharging structure are sequentially installed on the bracket according to the feeding direction;

[0008] The positioning and guiding structure includes a positioning frame, a limiting assembly, a positioning assembly and a transmission assembly. The limiting assembly is installed on the bracket. The positioning frame is movably connected with the limiting assembly. The positioning assembly includes a guide wheel, a rotating shaft and a bracket seat.

[0009] The left and right ends of the positioning frame are provided with transmission holes for the welding wire to pass through, the guide wheel is installed on the rotating shaft, and the two ends of the rotating shaft are rotatably installed on the inner wall of the positioning frame through the bracket seat, and the outer circumferential surface of the guide wheel is provided with a positioning tip ring, and the tip of the positioning tip ring is arranged in the unwelded seal of the welding wire, and the inner wall of the positioning frame is provided with a plurality of transmission components close to the welding wire for facilitating the transmission of the welding wire;

[0010] The welding structure is installed on the positioning frame, and the welding head of the welding structure is in the same straight line as the positioning tip ring and can move with the movement of the positioning frame.

[0011] Furthermore, the conveying assembly includes a roller, the roller is installed in the positioning frame through a support frame, and the roller is rotatably installed on the support frame.

[0012] Furthermore, the positioning frame is a door-shaped structure, and the cross-section of the positioning frame is a rectangular frame structure.

[0013] Furthermore, the positioning components are provided in two groups and are symmetrically installed at two ends of the positioning frame.

[0014] Furthermore, the limit assembly includes a limit frame and a limit hole. The limit frame is installed on the bracket. The limit frame is provided with a limit hole that passes through the limit hole to the left and right. The positioning frame passes through the limit hole, and the connection between the positioning frame and the limit hole is a limit block that can move left and right in the limit hole.

[0015] Furthermore, the limiting block and the limiting hole are both crescent-shaped, and the area of ​​the limiting hole is larger than the area of ​​the limiting block.

[0016] Furthermore, the feeding structure comprises a feeding guide roller, two of which are symmetrically mounted on the bracket and used for feeding the welding wire;

[0017] The discharging structure comprises a discharging guide roller, and two discharging guide rollers are symmetrically installed on the bracket and used for discharging welding wire.

[0018] A seamless welding process of flux-cored welding wire, comprising the following process flow: steel strip→slitting steel strip→cleaning steel strip→drying→rolling forming→filling powder→rolling joint→welding joint→reducing rolling→fine drawing→copper plating→coiling / barreling→packaging→warehousing;

[0019] Wherein, the welding seam process is completed by using the aforementioned flux-cored wire seamless welding equipment.

[0020] Furthermore, the longitudinal shearing of the steel strip includes side cutting at both ends of the steel strip, and the tangent value of the side cut angles at both ends of the steel strip is 0.32.

[0021] The advantages and beneficial effects of the present invention are:

[0022] (1) In the present invention, by installing the steel strip joint structure on the positioning frame, the joint head of the welding structure 1 and the positioning tip ring 6 are in the same straight line and can move with the movement of the positioning frame, which can ensure that the joint head of the welding structure is always in the area of ​​the steel strip to be jointed, and ensure that the steel strip jointing is completed.

[0023] (2) The copper plating process is a commonly used process for producing solid welding wire. The main purpose of the copper plating process for welding wire is to prevent corrosion, rust and increase the conductivity of the welding wire. Because the main component of solid welding wire is carbon steel, it is easy to rust and corrode when exposed to the air. Plating a layer of copper on the surface can effectively extend the anti-corrosion and anti-rust period. In addition, copper plating makes the surface of the welding wire smoother, improves wire feeding, and thus enhances its conductivity. However, the conventional seamless flux-cored welding wire cannot be copper-plated due to the gaps formed after the steel strip is formed, otherwise the coated powder is very susceptible to moisture. Therefore, the seamless flux-cored welding wire can solve this problem well, and realize the application of copper plating in the production process of flux-cored welding wire, thereby greatly reducing the content of diffusible hydrogen. The biggest advantage of this process is that it can clean all impurities and lubricants on the surface of the welding wire, while greatly reducing the resistivity through the copper plating layer on the surface of the welding wire, ensuring the stability of the current and smooth wire feeding, so as to ensure excellent welding processability and performance indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of the positioning welding structure provided by the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the limit component and the transmission component;

[0026] Figure 3 for Figure 1 A cross-sectional view in a direction perpendicular to the conveying direction;

[0027] Figure 4 for Figure 1 Cross-section along the conveying direction;

[0028] Figure 5 This is a schematic diagram of calculating the inner and outer cut angles at both ends of the steel strip;

[0029] Description of reference numerals:

[0030] Welding structure 1, positioning frame 2, guide wheel 3, rotating shaft 4, bracket seat 5, positioning sharp ring 6, roller 7, support frame 8, limit frame 9, limit hole 10, limit block 11, feed guide roller 12, discharge guide roller 13, steel belt 14. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] like Figure 1-Figure 4 As shown, a flux-cored wire seamless welding device includes a positioning welding structure,

[0034] The positioning welding structure comprises a bracket, a feeding structure, a positioning guide structure, a welding structure 1, and a discharging structure. The feeding structure, the positioning guide structure, the welding structure 1, and the discharging structure are sequentially installed on the bracket according to the feeding direction;

[0035] The positioning and guiding structure includes a positioning frame 2, a limiting assembly, a positioning assembly and a transmission assembly. The limiting assembly is installed on the bracket. The positioning frame 2 is movably connected with the limiting assembly. The positioning assembly includes a guide wheel 3, a rotating shaft 4 and a bracket seat 5.

[0036] The left and right ends of the positioning frame 2 are provided with transmission holes for the welding wire to pass through, the guide wheel 3 is installed on the rotating shaft 4, and the two ends of the rotating shaft 4 are rotatably installed on the inner wall of the positioning frame 2 through the bracket seat 5. A positioning sharp ring 6 is provided on the outer circumferential surface of the guide wheel 3, and the tip of the positioning sharp ring 6 is arranged in the unwelded seal of the welding wire. The inner wall of the positioning frame 2 is provided with a plurality of transmission components close to the welding wire for facilitating the transmission of the welding wire;

[0037] The welding structure 1 is installed on the positioning frame 2 , and the welding head of the welding structure 1 is in the same straight line as the positioning sharp ring 6 , and can move along with the movement of the positioning frame 2 .

[0038] In the above technical solution, by installing the welding structure on the positioning frame, the welding head of the welding structure 1 is in the same straight line with the positioning tip ring 6 and can move with the positioning frame 2, which can ensure that the welding head of the welding structure is always at the welding position to be welded, ensuring that the welding of the welding wire is completed.

[0039] As a preferred embodiment of the above technical solution, the transmission assembly includes a roller 7 and a support frame 8, the roller 7 is installed in the positioning frame 2 through the support frame 8, and the roller 7 is rotatably installed on the support frame 8.

[0040] As a preferred embodiment of the above technical solution, the positioning frame 2 is a door-type structure, and the cross-section of the positioning frame 2 is a rectangular frame structure.

[0041] As a preferred embodiment of the above technical solution, two groups of positioning components are provided and symmetrically installed at both ends of the positioning frame 2.

[0042] As a preferred embodiment of the above technical solution, the limit assembly includes a limit frame 9 and a limit hole 10. The limit frame 9 is installed on the bracket. The limit frame 9 is provided with a limit hole 10 which is set to pass through to the left and right. The positioning frame 2 is set to pass through the limit hole 10, and the connection between the positioning frame 2 and the limit hole 10 is a limit block 11 which can move left and right in the limit hole 10.

[0043] As a preferred embodiment of the above technical solution, the limit block 11 and the limit hole 10 are both crescent-shaped, and the area of ​​the limit hole 10 is larger than that of the limit block 11, so that the limit block can move left and right in the limit hole. Preferably, the limit block 11 is a crescent-shaped symmetrical arrangement, and the limit block 11 and the center of the steel pipe are on the same vertical line to ensure the consistency of the swing, thereby maintaining a consistent motion path.

[0044] As a preferred embodiment of the above technical solution, the feeding structure includes a feeding guide roller 12, two of the feeding guide rollers 12 are symmetrically installed on the bracket and used for feeding the steel strip;

[0045] The discharging structure comprises a discharging guide roller 13. Two discharging guide rollers 13 are symmetrically mounted on the bracket and are used for discharging the steel strip.

[0046] A seamless welding process of flux-cored welding wire, comprising the following process flow: steel strip→slitting steel strip→cleaning steel strip→drying→rolling forming→filling powder→rolling joint→welding joint→reducing rolling→fine drawing→copper plating→coiling / barreling→packaging→warehousing;

[0047] Wherein, the welding seam process is completed by using the above-mentioned flux-cored wire seamless welding equipment.

[0048] As a preferred embodiment of the above technical solution, the longitudinal cutting of the steel strip includes side cutting at both ends of the steel strip, and the tangent value of the side cut angles at both ends of the steel strip is 0.32.

[0049] like Figure 5 As shown, in order to better ensure the welding seam, the inner and outer cut angles at both ends of the steel strip are calculated as follows:

[0050] The outer width of the steel strip used in the production of flux-cored welding wire in the industry, that is, the outer circumference is L = 36mm. Assuming the thickness of the steel strip is xmm, the inner circumference of the steel strip can be obtained according to the circumference formula C = 2πr:

[0051] Cinside = 2πrinside = 2π(Routside-x) = 2π(36 / 2π-x) = 36-2πx(mm)

[0052] As above Figure 5 As shown, the outer side of each end of the steel strip is πxmm longer than the inner side, and the thickness of the steel strip is xmm, so tanα=x / πx=1 / π≈0.32.

[0053] It should be emphasized that the embodiments of the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation modes. Any other implementation modes derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A flux-cored wire seamless welding device, characterized in that: Including positioning welding structure, The positioning welding structure comprises a bracket, a feeding structure, a positioning guide structure, a welding structure (1), and a discharging structure, wherein the feeding structure, the positioning guide structure, the welding structure (1), and the discharging structure are sequentially installed on the bracket according to the feeding direction; The positioning guide structure comprises a positioning frame (2), a limiting assembly, a positioning assembly and a transmission assembly. The limiting assembly is mounted on a bracket. The positioning frame (2) is movably connected to the limiting assembly. The positioning assembly comprises a guide wheel (3), a rotating shaft (4) and a bracket seat (5). The left and right ends of the positioning frame (2) are provided with transmission holes for the welding wire to pass through, the guide wheel (3) is mounted on the rotating shaft (4), and the two ends of the rotating shaft (4) are rotatably mounted on the inner wall of the positioning frame (2) through a bracket seat (5), and a positioning tip ring (6) is provided on the outer circumferential surface of the guide wheel (3), and the tip of the positioning tip ring (6) is arranged in the unwelded seal of the welding wire, and a plurality of transmission components for facilitating the transmission of the welding wire are provided on the inner wall of the positioning frame (2) near the welding wire; The welding structure (1) is installed on the positioning frame (2), and the welding head of the welding structure (1) and the positioning tip ring (6) are on the same straight line and can move with the movement of the positioning frame (2).

2. A flux-cored wire seamless welding device according to claim 1, characterized in that: The transmission component comprises a roller (7) and a support frame (8); the roller (7) is installed in the positioning frame (2) through the support frame (8), and the roller (7) is rotatably installed on the support frame (8).

3. A flux-cored wire seamless welding device according to claim 1, characterized in that: The positioning frame (2) is a door-shaped structure, and the cross section of the positioning frame (2) is a rectangular frame structure.

4. A flux-cored wire seamless welding device according to claim 1, characterized in that: The positioning components are provided in two groups and are symmetrically mounted at both ends of the positioning frame (2).

5. The flux-cored wire seamless welding equipment according to claim 1, characterized in that: The limiting assembly comprises a limiting frame (9) and a limiting hole (10); the limiting frame (9) is mounted on a bracket; the limiting frame (9) is provided with a limiting hole (10) which is arranged to pass through the limiting hole (10) to the left and right; the positioning frame (2) passes through the limiting hole (10); and a limiting block (11) which can move left and right in the limiting hole (10) is formed at a connecting portion between the positioning frame (2) and the limiting hole (10).

6. A flux-cored wire seamless welding device according to claim 5, characterized in that: The limiting block (11) and the limiting hole (10) are both crescent-shaped, and the area of ​​the limiting hole (10) is larger than the area of ​​the limiting block (11).

7. The flux-cored wire seamless welding equipment according to claim 1, characterized in that: The feeding structure comprises a feeding guide roller (12), wherein two feeding guide rollers (12) are symmetrically mounted on the bracket and used for feeding the welding wire; The discharge structure comprises a discharge guide roller (13), wherein two discharge guide rollers (13) are symmetrically mounted on a bracket and used for discharging welding wire.

8. A flux-cored wire seamless welding process, characterized in that: The process includes: steel strip → steel strip longitudinal cutting → steel strip cleaning → drying → rolling forming → filling powder → rolling joint → welding joint → reducing rolling → fine drawing → copper plating → coil winding / barrel packing → packaging → storage; Wherein, the welding seam process is completed by using a flux-cored wire seamless welding device as described in any one of claims 1-6.

9. A flux-cored wire seamless welding process according to claim 8, characterized in that: The longitudinal shearing of the steel strip includes side cutting at both ends of the steel strip, and the tangent value of the side cut angles at both ends of the steel strip is 0.32.

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