A method for controlling fish scale pattern welding

Abstract

This invention relates to the field of fish-scale pattern welding technology, specifically to a method for controlling fish-scale pattern welding. It includes multiple consecutive welding cycles, each with an arc-stabilizing phase. This arc-stabilizing phase comprises a first stage, a second stage, a third stage, and a fourth stage performed sequentially. This invention performs periodic welding control, incorporating an arc-stabilizing phase within each welding cycle. During this phase, the welding wire remains in the molten pool for a certain period to calm the pool. This ensures that the molten pool is intermittently calmed throughout the welding process, thereby maintaining optimal stability and improving the quality of the fish-scale pattern weld.

Description

Technical Field

[0001] This invention relates to the field of fish scale pattern welding technology, and specifically to a method for controlling fish scale pattern welding. Background Technology

[0002] In traditional welding, the fish-scale pattern effect on the weld is usually achieved by oscillating the welding torch. In recent years, new methods have emerged, namely, achieving the fish-scale weld appearance by periodically switching between high and low welding parameters while the welding torch moves at a constant speed without oscillation. Currently, the main methods are: periodic switching between high and low pulses, periodic switching between pulse and short circuit, and periodic switching between pulse / short circuit and arc interruption. Because the fish-scale pattern requires high stability of the molten pool, the fish-scale pattern obtained by existing welding methods is easily affected by molten pool oscillation, resulting in unstable weld quality. Summary of the Invention

[0003] The purpose of this invention is to provide a method for controlling fish-scale pattern welding. This invention performs periodic welding control and incorporates an arc-stabilizing phase within each welding cycle. During the arc-stabilizing phase of each welding cycle, the welding wire remains in the molten pool for a certain period of time to calm the molten pool. Thus, throughout the entire welding process, the molten pool can be intermittently calmed, thereby maintaining better stability of the molten pool and improving the quality of fish-scale pattern welding.

[0004] In a first aspect, the present invention provides a method for controlling fish scale pattern welding, comprising multiple welding cycles performed continuously, wherein the welding cycle includes a pulse phase and an arc stabilization phase, wherein the arc stabilization phase includes a first phase, a second phase, a third phase and a fourth phase performed sequentially, and the first phase is entered in response to the end of the pulse phase of the current welding cycle.

[0005] In the first stage, the welding wire is fed forward and enters the second stage while the arc is kept burning. If a short circuit is detected and the arc is extinguished in the first stage, the wire feeding is stopped to allow the arc to reignite.

[0006] In the second stage, the welding wire is fed forward into the contact molten pool to cause a short circuit and extinguish the arc, and the feeding is stopped after a delay after the arc is extinguished to enter the third stage.

[0007] In the third stage, the wire feeding remains stopped and the arc remains extinguished before proceeding to the fourth stage; if an arc is detected in the third stage, the welding wire is fed forward to extinguish the arc.

[0008] In the fourth stage, the welding wire is pulled back in the opposite direction to reignite the arc, and the pulling back is stopped after a delay after arc ignition is detected, so as to enter the pulse stage of the next welding cycle.

[0009] Optionally, during the pulse phase, the wire is fed forward at a first speed; after the last pulse of the pulse phase ends, the first phase begins, and the welding current is adjusted from the pulse base current to the first current.

[0010] Optionally, in the first stage, if no short circuit is detected, a first current is output and a preset second speed is maintained for wire feeding;

[0011] In the first stage, when a short circuit is detected, wire feeding is stopped and the welding current is increased from the first current to a preset value to reach the third current so that the arc can be reignited.

[0012] After the arc reignites, the third current output is maintained, and wire feeding is stopped until the duration of the first stage reaches the preset third time to enter the second stage.

[0013] Optionally, the first speed is greater than the second speed, and the pulse base current is greater than the first current.

[0014] Optionally, in the second stage, the welding wire is fed forward at a third speed, which is greater than the second speed;

[0015] In the second stage, after a short circuit is detected, the wire feeding is stopped after a preset fifth time delay, so as to proceed to the third stage;

[0016] If the first stage does not detect a short circuit, the second stage outputs a first current before the short circuit occurs and a second current after the short circuit occurs.

[0017] If a short circuit is detected in the first stage, the second stage outputs a third current before the short circuit occurs and outputs a second current after the short circuit occurs.

[0018] Optionally, in the third stage, if no arcing is detected, a second current is output and the wire feed speed remains at zero;

[0019] In the third stage, when arcing is detected, the welding wire is fed forward at a third speed to extinguish the arc again by short-circuiting.

[0020] After a short circuit is detected, the wire feeding stops after a preset fifth time delay, and the fourth stage begins when the sum of the times of the second and third stages reaches a preset fourth time.

[0021] Optionally, after arc detection in the fourth stage, the retraction is stopped after a preset sixth time to enter the pulse stage of the next welding cycle.

[0022] Optionally, short-circuit detection is performed both during the first stage when the arc continues to burn and during the second stage when the welding wire is fed forward; the short-circuit detection includes:

[0023] Collect the welding voltage output from the welding machine.

[0024] If the welding voltage is less than a preset voltage threshold or the rate of change of the welding voltage is less than a preset rate of change threshold and the duration is greater than a preset time threshold, then a short circuit is detected.

[0025] Arc detection is performed both during the third stage when the arc remains extinguished and during the fourth stage when the welding wire is reversed and retracted; the arc detection includes:

[0026] The welding voltage output by the welding machine is collected. If the welding voltage is greater than a preset voltage threshold or the rate of change of the welding voltage is greater than a preset rate of change threshold and the duration is greater than a preset time threshold, then an arc is detected.

[0027] In a second aspect, the present invention provides a welding machine comprising:

[0028] Memory, used to store instructions;

[0029] A processor is configured to execute the instructions, causing the welding machine to perform operations that implement the welding control method.

[0030] Thirdly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the welding control method described above.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. This invention incorporates an arc-stabilizing stage into the original pulse welding process, thereby creating periodic welding control. During the arc-stabilizing stage, the welding wire stops and penetrates the molten pool, allowing the molten pool to be calmed and its stability improved. Thus, throughout the entire welding process, periodic and continuous control ensures the molten pool remains stable, resulting in a superior fish-scale pattern weld appearance.

[0033] 2. In the arc stabilization stage of the present invention, corresponding emergency treatment methods are pre-set for short circuits or arcing that are not in the preset situation, thereby ensuring that the entire welding control can be carried out stably and automatically without excessive human intervention.

[0034] 3. This invention achieves a perfect fish-scale pattern welding effect by adding an arc-maintaining stage during the pulse welding process. The addition of the arc-maintaining stage reduces the amount of filler wire and energy, and also stabilizes the molten pool, which can form a beautiful fish-scale pattern weld appearance within a wide range of specifications. Attached Figure Description

[0035] Figure 1 This is a flowchart illustrating the control method in Example 1;

[0036] Figure 2 This is a schematic diagram of the control method in Example 1;

[0037] Figure 3 for Figure 2 A schematic diagram showing the overall situation if a short circuit occurs in the first stage;

[0038] Figure 4 for Figure 2 A schematic diagram showing the overall situation if arcing occurs in the third stage. Detailed Implementation

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In the prior art known to the inventors of this application, fish scale pattern forming can eliminate post-weld processing methods and increase the aesthetics of the welded product. However, fish scale patterns require high stability of the molten pool. Most existing fish scale pattern welding methods employ periodic switching between high and low pulses, periodic switching between pulses and short circuits, and periodic switching between pulses / short circuits and arc interruption. There is a lack of specific control schemes for wire feed speed and arc ignition / extinguishing, making it difficult to guarantee the quality of fish scale pattern welding. For example, molten pool oscillation during welding can affect the quality of the fish scale pattern, such as the presence of textures on the surface.

[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example 1

[0042] like Figure 1-4 This invention achieves a fish-scale pattern welding effect by adding an arc-maintaining stage during pulse welding. The addition of the arc-maintaining stage reduces both the amount of filler wire and the energy required, while also stabilizing the molten pool, resulting in a beautiful fish-scale pattern weld appearance. The specific implementation method is as follows:

[0043] Combination Figure 1 This embodiment provides a fish scale pattern welding control method, mainly used for fish scale pattern welding. It includes multiple welding cycles performed continuously. The welding cycle includes an arc stabilization stage. It is worth noting that in this embodiment, an arc stabilization stage is added in each welding cycle. The welding quality of the fish scale pattern can be improved through periodic stable output.

[0044] Typically, within each welding cycle, the time occupied by the pulse phase and the arc stabilization phase is calculated and determined based on pre-read pulse parameters, such as pulse current, frequency, and duty cycle. The frequency is the reciprocal of the welding cycle, and the duty cycle is the proportion of the pulse phase to the welding cycle. The specific calculation method for the pulse phase and the arc stabilization phase can be determined based on the results of numerous experiments, or manually set according to the specific type of welded workpiece and welding requirements. This embodiment does not impose specific limitations. In a specific embodiment, the pulse phase time T1 ranges from 100ms to 1000ms, and the arc stabilization phase time T2 ranges from 100ms to 1000ms.

[0045] Combination Figure 2 The arc stabilization phase includes a first stage, a second stage, a third stage, and a fourth stage performed sequentially; the first stage, the second stage, the third stage, and the fourth stage are performed sequentially within a preset arc stabilization phase time.

[0046] Step S1: In the first stage, the welding wire is fed forward and the arc continues to burn. If a short circuit is detected to extinguish the arc in the first stage, the wire feeding is stopped to allow the arc to reignite.

[0047] The first stage is performed after the pulse phase of the current welding cycle. After the pulse phase ends, the welding current is reduced from the pulse base current IBA to the first current I1, where IBA ranges from 15A to 200A. The wire feed speed is also reduced from the first speed V1 to the second speed V2. During the first stage, the first current I1 is maintained and the wire is fed at the second speed V2, while the arc continues to burn. The first current I1, the first speed V1, and the second speed V2 are all preset values ​​based on experimental verification.

[0048] In one specific embodiment, the first current I1 ranges from 10A to 50A, the first speed V1 ranges from 1.0m / min to 25m / min, and the second speed V2 ranges from 0m / min to 5m / min. Specific values ​​can also be calibrated according to actual welding conditions; this embodiment does not impose specific limitations.

[0049] In one specific embodiment, the duration of the first stage is preset, with the timing starting at the end of the last pulse of the previous pulse stage. The first stage ends and the second stage begins after a preset third time T3 is reached. This preset third time T3 can be determined based on extensive experimental experience according to the specific type of workpiece being welded and the welding requirements. In one specific embodiment, the third time T3 is a preset value, ranging from 10ms to 100ms. In other specific embodiments, under special welding scenarios or welding requirements, the timing of the end of the first stage can also be manually controlled.

[0050] It is worth noting that, ideally, the arc can maintain combustion as set during the first stage. However, in actual operation, deviations in wire feed speed or current command output may cause a short circuit, extinguishing the arc.

[0051] In one specific embodiment, a warning message can be sent to the welding operator. If there is a significant abnormality in the wire feed speed or current command, the welding operator needs to stop the welding operation immediately to avoid the generation of defective products and to protect the welding machine. Combined with... Figure 3 If a short circuit occurs due to a minor deviation, it can be handled promptly using a pre-set processing method without stopping welding to ensure welding efficiency. The processing method is as follows: In the first stage, in response to the detection of a short circuit, wire feeding is stopped and the welding current is increased from the first current I1 to a preset value ΔI to reach the third current. After re-ignition, the third current output is maintained without reverting to the first current I1. The preset value ΔI ranges from 0A to 50A.

[0052] The purpose of stopping wire feeding is to promptly halt further wire feeding and filling. Increasing the welding current aims to rapidly ignite the arc, restoring it to the preset normal state, thereby minimizing adverse effects and facilitating the subsequent second stage. Under normal conditions, the first stage still ends at the preset third time. If, by the third time, the arc has not reignited, manual intervention by the welder is required. After restoring the original state, welding resumes from the pulse phase of the welding cycle.

[0053] Furthermore, at the end of the first stage, the electric arc continues to burn, at which point the second stage begins.

[0054] Step S2: In the second stage, the welding wire is fed forward to short-circuit the molten pool to extinguish the arc, and feeding is stopped after a delay after the arc is extinguished.

[0055] Specifically, the purpose of the second stage is to quickly achieve a short circuit and extinguish the arc, thereby providing more time for the subsequent wire to remain in place. Furthermore, the wire feed is delayed after a short circuit is detected; the continued feeding of this portion of wire provides more filler and allows for more thorough contact between the wire and the molten pool.

[0056] In one specific embodiment, after the first stage ends and the second stage begins, the wire feeding speed is increased from the second speed V2 to the third speed V3 for forward acceleration, thereby causing the welding wire to quickly contact the molten pool to induce a short circuit, and the arc is extinguished. In response to the detection of a short circuit, the welding current is increased from the first current I1 (or the third current if a short circuit is detected in the first stage) to the second current I2, while the third speed V3 is maintained for forward wire feeding and the feeding stops after a preset fifth time T5.

[0057] The purpose of increasing the welding current here is to avoid arc interruption during the subsequent retraction and arc ignition, and to facilitate the shedding of molten droplets during the output of the next welding stage. Generally, the larger the welding current, the more beneficial it is for the shedding of molten droplets. However, considering that the molten pool needs to be cooled, the welding current here should not be too large to avoid melting the welding wire and causing arc ignition, resulting in poor calming effect of the molten pool.

[0058] The third speed V3 and the second current I2 are preset values, with V3 ranging from 10m / min to 60m / min and I2 ranging from 30A to 150A; they can be set based on a large amount of experimental data according to the type of workpiece to be welded and the welding requirements.

[0059] In the second stage, after a short circuit is detected, the wire feeding stops after a preset fifth time T5, thus entering the third stage. The range of T5 is 0ms to 20ms.

[0060] Step S3: In the third stage, the wire feeding remains stopped and the arc is extinguished; if the arc is burning in the third stage, the welding wire is fed forward to extinguish the arc.

[0061] In the third stage, the welding current remains constant at the second current I2 when the welding wire stops. The purpose of the third stage is to maintain sufficient contact between the welding wire and the molten pool, thereby avoiding oscillation and ensuring the stability of the molten pool. Furthermore, the welding wire maintaining contact with the molten pool can also dissipate heat from the molten pool, thereby reducing heat input and making the welding process more suitable for welding thin plates with high surface finish requirements.

[0062] In one specific embodiment, since the short circuit detection time is not fixed, setting the second stage to a fixed time may result in insufficient wire feeding after the short circuit. For ease of control, this embodiment pre-sets the sum of the wire dwell time in the third stage and the duration of the second stage. The fourth stage begins when the sum of the times of the second and third stages reaches a preset fourth time T4. The fourth time T4 ranges from 20ms to 150ms.

[0063] That is, the dwell time of the welding wire is affected by the time of the second stage. If the short circuit is detected earlier in the second stage, the dwell time of the welding wire will be extended accordingly to further suppress the molten pool. If the short circuit is detected later in the second stage, the dwell time of the welding wire will be shortened accordingly to ensure that the subsequent stages can be carried out according to the preset time, thereby ensuring the continuity and integrity of the entire welding cycle.

[0064] Ideally, in the third stage, the arc should remain extinguished to calm the molten pool. However, in actual operation, due to deviations in wire feed speed and welding current output, arc reignition may still occur in the third stage. If arc reignition occurs, timely intervention by the welder is possible, but this would significantly increase the welder's workload during periodic welding control. Therefore, in a specific embodiment, a corresponding treatment method is used to address this situation; specifically, in conjunction with… Figure 4 When arcing is detected in the third stage, the welding wire is fed forward at the third speed V3 to short-circuit again. The wire feeding is stopped at the fifth time T5 after the short-circuit detection delay. The delayed wire feeding can still ensure that the welding wire is in full contact with the molten pool to calm the molten pool, thereby restoring the original state of the third stage before arcing.

[0065] Subsequently, following the preceding text, after the sum of the welding wire dwell time in the third stage and the duration of the second stage reaches the preset fourth time T4, the fourth stage begins.

[0066] Step S4: In the fourth stage, the welding wire is pulled back in the reverse direction to reignite the arc, and the pulling back is stopped after a delay after arc ignition is detected, so as to enter the pulse stage of the next welding cycle.

[0067] The purpose of the fourth stage is to reverse the welding wire to reignite the arc. The speed at which the welding wire is reversed is a preset fourth speed T4, which ranges from 10 m / min to 60 m / min.

[0068] After arc detection in the fourth stage, the retraction stops after a preset sixth time T6 to enter the pulse phase of the next welding cycle. The sixth time T6 ranges from 0ms to 20ms. Understandably, the fourth stage is a transition connecting to the next pulse phase; reverse wire retraction allows the welding wire to leave the molten pool, reigniting the arc. At this time, the welding current remains unchanged at the second current I2. After arc detection, the retraction stops after a delay to maintain a certain distance between the welding wire and the molten pool and stabilize the arc. After a preset seventh time T7 following arc detection, the first pulse of the next pulse phase is output. Thus, the transition between two adjacent welding cycles is completed, enabling stable and continuous control throughout the welding process. The seventh time T7 ranges from 0ms to 20ms.

[0069] Furthermore, with a high degree of automation in welding control, high-quality fish-scale patterns can be achieved without human intervention, except in extreme failure situations. In actual operation, the welding current waveform design may differ between the pulse phase and the arc stabilization phase depending on the wire diameter, shielding gas, or current value.

[0070] Short circuit detection is performed during the first stage when the arc is kept burning and during the second stage when the welding wire is fed forward. The short circuit detection includes: collecting the welding voltage output by the welding machine, and determining that a short circuit is detected if the welding voltage is less than a preset voltage threshold or the rate of change of the welding voltage is less than a preset rate of change threshold and the duration is greater than a preset time threshold.

[0071] Arc detection is performed both during the third stage when the arc remains extinguished and during the fourth stage when the welding wire is reversed. Arc detection includes: acquiring the welding voltage output by the welding machine; if the welding voltage exceeds a preset voltage threshold or the rate of change of the welding voltage exceeds a preset rate of change threshold, and the duration exceeds a preset time threshold, then arc detection is determined. The preset voltage threshold, rate of change threshold, and preset time threshold can all be determined experimentally, and this embodiment does not impose specific limitations. This method accurately and promptly detects short circuits and arcs. Example 2

[0072] Based on the same inventive concept as Embodiment 1, in one embodiment of this application, a welding machine is also disclosed, comprising: a memory for storing instructions; and a processor for executing the instructions, causing the welding machine to perform the operation of the welding control method of any of the above embodiments. The components of the welding machine may include, but are not limited to: at least one processor, at least one memory, and a bus connecting different system components (including the memory and the processor). The processor may be connected to the welding section of the welding machine, which generates heat in response to the welding current output by the processor to achieve welding of the workpiece.

[0073] The memory stores program code that can be executed by a processor, causing the processor to perform the steps described in the "Exemplary Methods" section above, based on various exemplary embodiments of the present invention. For example, the processor can perform actions such as... Figure 1 The steps are shown. The memory may include readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory, and may further include read-only memory (ROM). The memory may also include programs / utilities having a set (at least one) of program modules, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment. The bus may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of a variety of bus structures.

[0074] The welding machine can also communicate with one or more external devices (such as keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable user interaction with the welding machine, and / or any device that enables the welding machine to communicate with one or more other computing devices (such as routers, modems, etc.). This communication can be achieved through input / output (I / O) interfaces. Furthermore, the welding machine can communicate with one or more networks (such as local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter. The network adapter communicates with other modules of the welding machine via a bus. Example 3

[0075] Based on the same inventive concept as Embodiment 1, this embodiment provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the welding control method described above.

[0076] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0078] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0079] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0080] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

[0081] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A fishplating control method characterized by, The method comprises a plurality of welding cycles performed continuously, each welding cycle comprising a pulse phase and an arc stabilizing phase, the arc stabilizing phase comprising a first phase, a second phase, a third phase and a fourth phase performed in sequence, the first phase being entered in response to the end of the pulse phase of the current welding cycle; in the first phase, the welding wire is fed forward and the arc is kept burning to enter the second phase, if short circuit is detected in the first phase, the wire feeding is stopped to make the arc reignite; in the second phase, the welding wire is fed forward to contact the molten pool to cause short circuit, and the wire feeding is stopped after the arc is extinguished to enter the third phase; in the third phase, the wire feeding is kept stopped and the arc is kept extinguished to enter the fourth phase, if the arc reignites in the third phase, the welding wire is fed forward to extinguish the arc; in the fourth phase, the welding wire is retracted reversely to make the arc reignite, and the wire retracting is stopped after the arc reignites to enter the pulse phase of the next welding cycle; in the pulse phase, the welding wire is fed forward at a first speed; after the last pulse of the pulse phase ends, the first phase is entered, and the welding current is lowered from a pulse base current to a first current; in the first phase, the first current is outputted and the wire feeding is kept at a preset second speed when no short circuit is detected; in the first phase, the wire feeding is stopped and the welding current is raised from the first current to a third current by a preset value to make the arc reignite when short circuit is detected; after the arc reignites, the third current is kept outputted, and the wire feeding is stopped until the duration of the first phase reaches a preset third time to enter the second phase; the first speed is greater than the second speed, and the pulse base current is greater than the first current; in the second phase, the welding wire is fed forward at a third speed, the third speed being greater than the second speed; in the second phase, the wire feeding is stopped after a preset fifth time when short circuit is detected to enter the third phase; if no short circuit is detected in the first phase, the second phase outputs the first current before short circuit occurs and outputs the second current after short circuit occurs; if short circuit is detected in the first phase, the second phase outputs the third current before short circuit occurs and outputs the second current after short circuit occurs; in the third phase, the second current is outputted and the wire feeding speed is kept at zero when no arc reignites is detected; in the third phase, the welding wire is fed forward at the third speed to extinguish the arc again when arc reignites is detected; the wire feeding is stopped after a preset fifth time when short circuit is detected, and the fourth phase is entered when the sum of the time of the second phase and the third phase reaches a preset fourth time.

2. The fishplating control method of claim 1 wherein, the wire retracting is stopped after a preset sixth time when arc reignites is detected in the fourth phase to enter the pulse phase of the next welding cycle.

3. The fish scale welding control method according to claim 1, wherein, short circuit detection is performed when the arc is kept burning in the first phase and when the welding wire is fed forward in the second phase; the short circuit detection comprises: collecting welding voltage outputted by the welding machine, determining that short circuit is detected in response to the welding voltage being less than a preset voltage threshold value or the voltage change rate of the welding voltage being less than a preset change rate threshold value, and the duration being greater than a preset time threshold value. The arc ignition detection is performed when the arc is kept off in the third phase and when the welding wire is retracted reversely in the fourth phase; the arc ignition detection comprises: The welding voltage output by the welding machine is collected, and the arc ignition detection is determined when the welding voltage is greater than a preset voltage threshold or the voltage change rate of the welding voltage is greater than a preset change rate threshold, and the duration is greater than a preset time threshold.

4. A welding machine characterized by, The welding machine comprises: a memory for storing instructions; a processor for executing the instructions, so that the welding machine performs the operation of the welding control method according to any one of claims 1-3.

5. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the welding control method according to any one of claims 1-3.

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