Automatic filament submerged arc welding trolley and automatic filament submerged arc welding method

Abstract

The invention discloses an automatic filament submerged arc welding trolley and an automatic filament submerged arc welding method, and belongs to the technical field of ship engineering. The automatic filament submerged arc welding trolley comprises a welding trolley provided with a welding gun, and the moving direction of the welding trolley is configured to be a first direction; the moving mechanism is arranged on the welding trolley, and the moving mechanism is configured to abut against the plate face of a to-be-welded arc plate so that the welding trolley can move along a set track; the profiling support is arranged on the welding trolley and can stretch out and draw back in the second direction and the third direction, and every two of the first direction, the second direction and the third direction are orthogonal; and the profiling wheel set is arranged on the profiling support, and in the second direction, the profiling wheel set and the moving mechanism are arranged in a spaced mode. According to the automatic filament submerged arc welding trolley and the automatic filament submerged arc welding method, the welding quality and efficiency of the flat butt joint arc-shaped welding seam of the arc-shaped plate can be improved.

Description

Technical Field

[0001] This application belongs to the field of marine engineering technology, and in particular relates to an automatic submerged arc welding trolley and an automatic submerged arc welding method. Background Technology

[0002] In the process of manufacturing ship sections, in order to save materials, two curved plates are usually spliced ​​together into a whole plate, and the butt weld of the spliced ​​plates forms a curved weld.

[0003] Existing automatic welding carriages for fine wire submerged arc welding are designed with contour-following guide wheels for fillet welds between curved T-profile surfaces and webs, and cannot be directly used for butt welds on curved surfaces. Manual welding, on the other hand, results in unsatisfactory weld quality and operational efficiency. Summary of the Invention

[0004] This application provides an automatic submerged arc welding carriage and an automatic submerged arc welding method, aiming to at least partially solve the technical problem of unsatisfactory welding quality and efficiency of butt welds on curved plates. Therefore, One aspect of this application provides a fine-wire submerged arc welding automatic welding trolley, comprising: A welding carriage equipped with a welding torch; A moving mechanism is provided on the welding carriage, and the moving mechanism is configured to abut against the surface of the arc plate to be welded, so that the welding carriage moves along a first direction; A contouring bracket is disposed on the welding trolley. The contouring bracket can extend and retract along a second direction and a third direction, and the first direction, the second direction, and the third direction are orthogonal to each other. A contour wheel assembly is disposed on the contour bracket. The contour wheel assembly and the moving mechanism are spaced apart in the second direction. The welding torch and the contour wheel assembly are located on the welding carriage and on both sides of the third direction.

[0005] In some embodiments, in the second direction, the welding torch and the moving mechanism are located on both sides of the welding carriage.

[0006] In some embodiments, the mobility mechanism includes: A drive motor is mounted on the welding trolley, and the drive motor is equipped with a transmission mechanism; The traveling wheel assembly is connected to the transmission mechanism, and in the second direction, the traveling wheel assembly and the contour wheel assembly are located on the same side of the welding trolley.

[0007] In some embodiments, the running wheel assembly includes at least two running wheels, which are spaced apart along the third direction.

[0008] In some embodiments, the conformal support includes: A first telescopic mechanism is connected to the welding trolley, and the telescopic direction of the first telescopic mechanism is set along the third direction; The second telescopic mechanism is connected to the first telescopic mechanism and the contour wheel assembly, and the telescopic direction of the second telescopic mechanism is set along the second direction.

[0009] In some embodiments, the first telescopic mechanism includes nested first rods and second rods, and a first tightening bolt is provided between the first rods and the second rods; The first rod is connected to the welding trolley, and the second rod is connected to the second telescopic mechanism.

[0010] In some embodiments, the second telescopic mechanism includes nested third and fourth rods, and a second tightening bolt is provided between the third and fourth rods; The third rod is connected to the second rod, and the fourth rod is connected to the contour wheel assembly.

[0011] In some embodiments, the contour wheel assembly includes: A contoured wheel seat is connected to the fourth rod. Multiple contouring wheels are disposed on the contouring wheel seat.

[0012] In some embodiments, in the third direction Y, the rolling wheel surfaces of the plurality of contouring wheels near the welding torch are at the same height and configured to abut against the rolling wheel surface of the arc plate to be welded.

[0013] Another aspect of this application embodiment also provides a fine wire submerged arc automatic welding method, including: using the aforementioned fine wire submerged arc automatic welding trolley; The moving mechanism is movably disposed on the surface of the arc plate to be welded, the contour wheel set rolls against the side wall of the arc plate to be welded away from the weld seam, and the welding torch is directed toward the weld seam.

[0014] The embodiments of this application have at least the following beneficial effects: The automatic submerged arc welding carriage and automatic submerged arc welding method provided in this application embodiment include: a welding carriage, a moving mechanism, a contouring bracket, and a contouring wheel set; the welding carriage is equipped with a welding torch, and the moving direction of the welding carriage is configured as a first direction; the moving mechanism is disposed on the welding carriage, and the moving direction of the moving mechanism is configured as the first direction; the contouring bracket is disposed on the welding carriage, and the contouring bracket can extend and retract along a second direction and a third direction, and the first direction, the second direction, and the third direction are orthogonal to each other; the contouring wheel set is disposed on the contouring bracket. In the second direction, the conforming wheel set and the moving mechanism are spaced apart, with the welding torch and the conforming wheel set located on the welding carriage on both sides of the third direction. The moving mechanism moves on the surface of the arc-shaped plate, and the conforming wheel set abuts against the sidewall of the arc-shaped plate to be welded, achieving conforming guidance. This allows the welding torch to move stably and accurately along the arc-shaped weld seam, ensuring welding quality and efficiency. The conforming support can extend and retract to accommodate plates of different widths and thicknesses, providing good adaptability and contributing to improved welding quality and efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of the automatic submerged arc welding trolley and the arc plate to be welded in an embodiment of this application is shown. Figure 2 It shows Figure 1 Top view.

[0017] Figure label: 1-Welding carriage, 11-Welding torch, 12-Moving mechanism, 121-Walking wheel set, 121a-Walking wheel, 13-Welding torch bracket, 14-Cable; 2-Contouring bracket, 21-First telescopic mechanism, 211-First rod, 212-Second rod, 213-First tightening bolt, 22-Second telescopic mechanism, 221-Third rod, 222-Fourth rod, 223-Second tightening bolt, 23-Fastener; 3-Contouring wheel set, 31-Contouring wheel set, 32-Contouring wheel; 5-Arc plate to be welded, 51-Weld, 52-Side wall. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0020] This application is described below with reference to the accompanying drawings and specific embodiments: During the manufacturing of a certain ship hull section, to save materials, two curved flat plates need to be spliced ​​into a single plate, forming a curved weld at the butt joint. However, existing automatic submerged arc welding carriages are designed with contour guide wheels for curved T-shaped profiles and web plate splicing fillet welds, and cannot be directly used for butt joint curved welds. Manual welding, on the other hand, results in unsatisfactory weld quality and work efficiency.

[0021] Therefore, this application provides an automatic submerged arc welding carriage and an automatic submerged arc welding method, which aims to solve, to at least some extent, the technical problem of unsatisfactory welding quality and efficiency of butt joint arc welds on curved plates.

[0022] See Figure 1 and Figure 2 In some embodiments, the automatic submerged arc welding carriage is used for flat-to-flat welding of two arc plates 5 to be welded, with the weld 51 being arc-shaped. After the two arc plates 5 are flat-to-flatly aligned, the automatic submerged arc welding carriage is positioned on the surface of the arc plates 5 and moves along a predetermined trajectory to perform submerged arc welding. The arc plates 5 to be welded are regular arc plates of equal width and a certain length.

[0023] The automatic submerged arc welding carriage includes a welding carriage 1, a contouring bracket 2, and a contouring wheel set 3; the contouring wheel set 3 is connected to the welding carriage 1 via the contouring bracket 2. During assembly and use, the welding carriage 1 is positioned on the surface of the arc plate 5 to be welded, and the contouring wheel set 3 abuts against the side wall 52 of the arc plate 5. Generally, the welding carriage 1 typically moves along the extension direction of the weld seam 51 (usually the length direction of the arc plate 5 to be welded), and the contouring wheel set 3 rolls against the side wall 52 of the arc plate 5 along its length.

[0024] The welding carriage 1 is a mobile carrier used to support the welding torch 11 and its corresponding welding functional components, such as the welding torch holder 13 and cables 14. The welding torch holder 12 can be located on one side of the welding carriage 1, allowing the welding torch 11 to extend beyond the main body area of ​​the welding carriage 1 and thus be suspended on one side of the weld 51, reducing the risk of interference with surrounding structures during welding operations. Generally, the welding torch 11 should have the ability to swing during welding operations; therefore, the welding torch holder 12 is a movable support that can move or deflect to a certain extent along the length, width, or depth of the weld 51 to adjust the welding angle of the welding torch 11.

[0025] The welding carriage 1 is also provided with a moving mechanism 12 on the side near the arc plate 5 to be welded, serving as the moving mechanism of the moving carriage 1. The moving mechanism 12 is configured to abut against the surface of the arc plate 5 to be welded, allowing the welding carriage 1 to move on the surface of the arc plate 5. Generally, the moving direction of the moving mechanism 12 is consistent with the direction of the weld 51; considering that the weld 51 is flat-to-arc and its overall direction is along the length of the arc plate 5 to be welded, the moving direction of the moving mechanism 12 and the welding carriage 1 can be configured along the first direction X of the welding carriage 1, typically set to the length direction of the welding carriage 1. The length directions (extension directions) of the weld 51 and the sidewall 52 are consistent, i.e., they are parallel.

[0026] The contouring bracket 2 is a connecting structure connecting the contouring wheel set 3 and the welding carriage 1. It is used to adjust the position of the contouring wheel set 3 relative to the welding carriage 1, thereby adapting to the width of the arc plate 5 to be welded (the distance between the weld 51 and the side wall 52 along the length direction of the arc plate 5) and the thickness of the arc plate 5 to be welded (the width of the side wall 52 along the length direction of the arc plate 5). Therefore, the contouring bracket 2 can deform or move in the width and thickness directions of the arc plate 5 to be welded, so that the contouring wheel set 3 can adaptively adjust its position. For ease of description, the width of the side wall 52 along the length direction of the arc plate 5 to be welded is configured as the second direction Z, and the width direction of the arc plate 5 to be welded is configured as the third direction Y. Typically, the second direction Z can be configured as the height direction of the welding carriage 1, and the third direction Y can be configured as the width direction of the welding carriage 1. Therefore, any two of the first direction X, the second direction Z, and the third direction Y are orthogonal.

[0027] It is worth noting that, considering that the arc plate 5 to be welded may not be a standard rectangular plate, the extension direction of the weld 51 and the length direction of the sidewall 52 are not standard straight lines; therefore, the first direction X is not necessarily a straight line, but can be understood as an arc-shaped direction, which deflects slightly as the welding carriage 1 moves; that is, based on the differential principle, the movement trajectory of the welding carriage 1 can be decomposed into multiple continuous straight line segments, each of which is the first direction X, or the first direction X can be defined with the length direction of the welding carriage 1 as the standard, and the first direction X changes as the posture of the welding carriage 1 changes; similarly, the third direction Y also changes with the posture of the welding carriage 1, but can be understood as the width direction of the welding carriage 1; and the first direction X and the third direction Y are always orthogonal and always orthogonal to the second direction Z.

[0028] The contour wheel set 3 rolls against the side wall 52 of the arc plate 5 to be welded and can roll along the length of the side wall 52, thereby guiding the welding carriage 1 along the side wall 52 and the weld 51. Considering that the weld 51 is located between two arc plates 5 to be welded, and the side wall 52 is located on the side away from 51, the welding torch 11 and the contour wheel set 3 are located on both sides of the welding carriage 1 in the third direction Y; correspondingly, the contour wheel set 4 and the moving mechanism 2 are spaced apart in the second direction Z. Taking the arc plate 5 to be welded as a horizontal arrangement as an example, the welding carriage 1 is vertically arranged, and the second direction Z is the vertical direction; the welding torch 11 is located on the welding carriage 1. In some embodiments, in the second direction, the welding torch and the moving mechanism are located on both sides of the welding carriage.

[0029] In some embodiments, the moving mechanism 12 needs to maintain a certain stability of the welding carriage 1 to avoid improper posture changes such as oscillation, thereby ensuring welding quality.

[0030] Considering that the welding carriage 1 and the surface of the arc plate 5 to be welded form a relatively smooth and stable support interface, the moving mechanism 12 can adopt a roller-based moving structure. That is, the moving mechanism 12 may include a drive motor (not shown) and a set of traveling wheels 121; the drive motor is connected to the set of traveling wheels 121 via a transmission mechanism to drive the set of traveling wheels 121 to rotate. The set of traveling wheels 121 may be located on the side of the welding carriage 1 closest to the surface of the arc plate 5 to be welded, such as the bottom of the welding carriage 1.

[0031] It is worth noting that the welding carriage 1 is integrally arranged on the arc plate 5 to be welded. Therefore, the traveling wheel set 121 and the contour wheel set 3 can be located on the same side of the welding carriage 1, that is, at the bottom or below. Correspondingly, the two opposing arc plates 5 to be welded can be laid horizontally or at a small angle to the horizontal plane. The welding carriage 1 is supported on the surface of the arc plate 1 to be welded by the traveling wheel set 121 and hooked onto the side wall 52 by the contour bracket 2 and the contour wheel set 3.

[0032] In some embodiments, in order to ensure the stability of the welding carriage 1 in the third direction Y, the traveling wheel set 121 includes at least two traveling wheels 121a, which are spaced apart along the third direction Y to form at least two fulcrums and maintain the stability of the posture.

[0033] Similarly, in order to ensure the stability of the welding trolley 1 in the first direction X, the running wheel set 121 includes at least two running wheels 121a arranged at intervals in the first direction X, thereby forming at least two fulcrums to maintain the stability of the posture.

[0034] In some embodiments, in order to realize the telescopic function of the contouring bracket 2 in the second direction Z and the third direction Y, the contouring bracket 2 may include: a first telescopic mechanism 21 and a second telescopic mechanism 22; the first telescopic mechanism 21 is connected to the welding trolley 1, and the telescopic direction of the first telescopic mechanism 21 is set along the third direction Y; the second telescopic mechanism 22 is connected to the first telescopic mechanism 21 and the contouring wheel set 3, and the telescopic direction of the second telescopic mechanism 22 is set along the second direction Z.

[0035] In other words, the first telescopic mechanism 21 extends and retracts along the width direction of the arc plate 5 to be welded, adjusting the distance between the welding carriage 1 and the contour wheel set 3 in the third direction Y. The second telescopic mechanism 21 extends and retracts along the second direction Z, adjusting the distance between the welding carriage 1 and the contour wheel set 3 in the second direction Z. Through the flexible extension and retraction of the first telescopic mechanism 21 and the second telescopic mechanism 22, the arc plate 5 to be welded with different widths and thicknesses can be accommodated.

[0036] In some embodiments, the first telescopic mechanism 21 is a telescopic rod assembly, which may include a nested first rod 211 and a second rod 212, and a first tightening bolt 213 is provided between the first rod 211 and the second rod 212; the first rod 211 is connected to the welding trolley 1, and the second rod 212 is connected to the second telescopic mechanism 22.

[0037] Similarly, the second telescopic mechanism 22 can also be a telescopic rod assembly, which may include a nested third rod 221 and a fourth rod 222, and a second tightening bolt 223 is provided between the third rod 221 and the fourth rod 222; the third rod 221 is connected to the second rod 212, and the fourth rod 222 is connected to the contour wheel set 3.

[0038] Generally, to facilitate connection, a fastener 23 can be provided between the second rod 212 and the third rod 221, and the fastener 23 can be used to fix the second rod 212 and the third rod 221 respectively.

[0039] Generally, the first rod 211 and the second rod 212 are approximately parallel to the arc-shaped plate 5 to be welded, and the third rod 221 and the fourth rod 222 are arranged along the second direction Z.

[0040] In some embodiments, the contour wheel assembly 3 includes: a contour wheel seat 31 and a plurality of contour wheels 32; the contour wheel seat 31 is connected to the fourth rod 222; the plurality of contour wheels 32 are disposed on the contour wheel seat 31.

[0041] In some embodiments, in the third direction Y, the rolling surfaces of the plurality of contouring wheels 32 near the welding torch 11 are at the same height and are configured to abut against the rolling surface of the arc plate 5 to be welded, thereby enabling the plurality of contouring wheels 32 to maintain a relatively uniform range of movement.

[0042] Another aspect of this application embodiment also provides a fine wire submerged arc automatic welding method, including: using the aforementioned fine wire submerged arc automatic welding trolley; The moving mechanism 12 is movably disposed on the surface of the arc plate 5 to be welded, the contour wheel set 3 rolls against the side wall 52 of the arc plate 5 to be welded away from the weld seam 51, and the welding torch 11 is directed toward the weld seam 51 to be welded.

[0043] The embodiments of this application have at least the following beneficial effects: The automatic submerged arc welding carriage and automatic submerged arc welding method provided in this application embodiment include: a welding carriage, a moving mechanism, a contouring bracket, and a contouring wheel set; the welding carriage is equipped with a welding torch, and the moving direction of the welding carriage is configured as a first direction; the moving mechanism is disposed on the welding carriage, and the moving direction of the moving mechanism is configured as the first direction; the contouring bracket is disposed on the welding carriage, and the contouring bracket can extend and retract along a second direction and a third direction, and the first direction, the second direction, and the third direction are orthogonal to each other; the contouring wheel set is disposed on the contouring bracket. In the second direction, the conforming wheel set and the moving mechanism are spaced apart, with the welding torch and the conforming wheel set located on the welding carriage on both sides of the third direction. The moving mechanism moves on the surface of the arc-shaped plate, and the conforming wheel set abuts against the sidewall of the arc-shaped plate to be welded, achieving conforming guidance. This allows the welding torch to move stably and accurately along the arc-shaped weld seam, ensuring welding quality and efficiency. The conforming support can extend and retract to accommodate plates of different widths and thicknesses, providing good adaptability and contributing to improved welding quality and efficiency.

[0044] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In this application, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of the aforementioned features. In the description of this application, "multiple" means two or more, unless otherwise explicitly and specifically limited.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0048] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0049] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic submerged arc welding trolley for fine wires, characterized in that, include: A welding carriage is equipped with a welding torch and a moving mechanism, wherein the moving mechanism is configured to abut against the surface of the arc plate to be welded and to allow the welding carriage to move along a first direction. A contouring bracket is disposed on the welding trolley. The contouring bracket can extend and retract along a second direction and a third direction, and the first direction, the second direction, and the third direction are orthogonal to each other. A contour wheel assembly is disposed on the contour bracket. The contour wheel assembly and the moving mechanism are spaced apart in the second direction. The welding torch and the contour wheel assembly are located on the welding carriage on both sides in the third direction, and the contour wheel assembly is configured to abut against the side wall of the arc plate to be welded.

2. The automatic submerged arc welding trolley with fine wire as described in claim 1, characterized in that, In the second direction, the welding torch and the moving mechanism are located on both sides of the welding carriage.

3. The automatic submerged arc welding trolley as described in claim 1, characterized in that, The mobile mechanism includes: A drive motor is mounted on the welding trolley, and the drive motor is equipped with a transmission mechanism; The traveling wheel assembly is connected to the transmission mechanism, and in the second direction, the traveling wheel assembly and the contour wheel assembly are located on the same side of the welding trolley.

4. The automatic submerged arc welding trolley with fine wire as described in claim 3, characterized in that, The running wheel assembly includes at least two running wheels, which are spaced apart along the third direction.

5. The automatic submerged arc welding trolley as described in claim 1, characterized in that, The contouring support includes: A first telescopic mechanism is connected to the welding trolley, and the telescopic direction of the first telescopic mechanism is set along the third direction; The second telescopic mechanism is connected to the first telescopic mechanism and the contour wheel assembly, and the telescopic direction of the second telescopic mechanism is set along the second direction.

6. The automatic submerged arc welding trolley as described in claim 5, characterized in that, The first telescopic mechanism includes a nested first rod and a second rod, and a first tightening bolt is provided between the first rod and the second rod; The first rod is connected to the welding trolley, and the second rod is connected to the second telescopic mechanism.

7. The automatic submerged arc welding trolley as described in claim 6, characterized in that, The second telescopic mechanism includes nested third and fourth rods, and a second tightening bolt is provided between the third and fourth rods; The third rod is connected to the second rod, and the fourth rod is connected to the contour wheel assembly.

8. The automatic submerged arc welding trolley as described in claim 7, characterized in that, The contour wheel assembly includes: A contoured wheel seat is connected to the fourth rod. Multiple contouring wheels are disposed on the contouring wheel seat.

9. The automatic submerged arc welding trolley as described in claim 8, characterized in that, In the third direction, the rolling wheel surfaces of the plurality of contouring wheels near the welding gun are at the same height and are configured to abut against the rolling wheel surface of the arc plate to be welded.

10. An automatic submerged arc welding method for fine wires, characterized in that, include: The fine wire submerged arc welding automatic welding trolley as described in any one of claims 1 to 9 is adopted; The moving mechanism is movably disposed on the surface of the arc plate to be welded, the contour wheel set rolls against the side wall of the arc plate to be welded away from the weld seam, and the welding torch is directed toward the weld seam.

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