Fish scale pattern welding control method

Abstract

The invention relates to the technical field of fish scale pattern welding, in particular to a fish scale pattern welding control method. Comprising a plurality of welding periods which are continuously carried out, the welding periods are added into an arc stabilizing stage, and the arc stabilizing stage comprises a first stage, a second stage, a third stage and a fourth stage which are sequentially carried out. Periodic welding control is carried out, an arc stabilizing stage is added in each welding period, and welding wires can stay in a molten pool for a certain time in the arc stabilizing stage of each welding period so as to calm the molten pool. Therefore, in the whole welding process, the molten pool can be killed discontinuously, so that the molten pool keeps good stability continuously, and the purpose of improving the fish scale pattern welding quality is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of fish scale welding, and in particular to a fish scale welding control method. Background Art

[0002] In the traditional welding process, the welding gun is usually used to swing to achieve the fish scale effect of the weld. In recent years, a new means of realization has emerged, that is, when the welding gun does not swing and moves at a constant speed, the fish scale weld appearance is achieved by periodically switching between high and low welding specifications. At present, the main implementation methods are: periodic switching between high and low pulses, periodic switching between pulses and short circuits, and periodic switching between pulses / short circuits and broken arcs. Since the fish scale pattern has high requirements for the stability of the molten pool, the fish scale pattern obtained by the existing welding method is easily affected by the oscillation of the molten pool, and the welding quality is unstable. Summary of the invention

[0003] The purpose of the present invention is to provide a fish scale pattern welding control method. The present invention performs periodic welding control and adds an arc stabilization stage in each welding cycle. In the arc stabilization stage of each welding cycle, the welding wire will stay in the molten pool for a certain period of time to calm the molten pool. Therefore, during the entire welding process, the molten pool can be intermittently calmed, so that the molten pool can continue to maintain a better stability, so as to achieve the purpose of improving the quality of fish scale pattern welding.

[0004] In a first aspect, the present invention provides a fish scale pattern welding control method, which includes a plurality of welding cycles performed continuously, wherein the welding cycle includes a pulse stage and an arc stabilization stage, wherein the arc stabilization stage includes a first stage, a second stage, a third stage and a fourth stage performed sequentially, and the first stage is entered in response to the end of the pulse stage of the current welding cycle; In the first stage, the welding wire is fed forward and the arc is kept burning to enter the second stage. If a short circuit is detected in the first stage, the wire feeding is stopped to allow the arc to reignite. In the second stage, the welding wire is fed forward to contact the molten pool to cause short circuit and arc extinguishing, and the feeding is stopped after the arc is extinguished to enter the third stage; In the third stage, the wire feeding is stopped and the arc is extinguished to enter the fourth stage; if arcing is detected in the third stage, the welding wire is fed forward to extinguish the arc; In the fourth stage, the welding wire is reversely retracted to reignite the arc and the retraction is stopped after the arc is detected, so as to enter the pulse stage of the next welding cycle.

[0005] Optionally, the wire is fed forward at a first speed during the pulse stage; the first stage is entered after the last pulse of the pulse stage ends, and the welding current is reduced from the pulse base current to the first current.

[0006] Optionally, in the first stage, when no short circuit is detected, the first current is output and the wire is fed at a preset second speed; 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 a third current so that the arc is reignited; After the arc reignites, the third current output is maintained, and wire feeding is stopped until the duration of the first stage reaches a preset third time to enter the second stage.

[0007] Optionally, the first speed is greater than the second speed, and the pulse base current is greater than the first current.

[0008] Optionally, in the second stage, the welding wire is fed forward at a third speed, and the third speed is greater than the second speed; In the second stage, after the short circuit is detected, the wire feeding is stopped for a preset fifth time to enter the third stage; If no short circuit is detected in the first stage, the second stage outputs a first current before the short circuit occurs, and outputs a second current after the short circuit occurs; 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.

[0009] Optionally, in the third stage, when arcing is not detected, the second current is output and the wire feeding speed is kept at zero; In the third stage, when arcing is detected, the welding wire is fed forward at a third speed to short-circuit and extinguish the arc again; After the short circuit is detected, the wire feeding is stopped for a preset fifth time, and the fourth stage is entered when the sum of the time of the second stage and the third stage reaches a preset fourth time.

[0010] Optionally, after arcing is detected in the fourth stage, the withdrawal is stopped after a preset sixth time delay to enter the pulse stage of the next welding cycle.

[0011] Optionally, short circuit detection is performed when the arc is kept burning in the first stage and when the welding wire is fed forward in the second stage; the short circuit detection includes: Collect the welding voltage output by the welding machine, In response to the welding voltage being less than a preset voltage threshold or the voltage change rate of the welding voltage being less than a preset change rate threshold, and the duration being greater than a preset time threshold, it is determined that a short circuit is detected; When the arc is kept extinguished in the third stage, and when the welding wire is reversely withdrawn in the fourth stage, arc detection is performed; the arc detection includes: The welding voltage output by the welding machine is collected. In response to the welding voltage being greater than a preset voltage threshold or the voltage change rate of the welding voltage being greater than a preset change rate threshold, and the duration being greater than a preset time threshold, it is determined that arcing is detected.

[0012] In a second aspect, the present invention provides a welding machine, comprising: A memory for storing instructions; The processor is used to execute the instructions so that the welding machine performs operations to implement the welding control method.

[0013] In a third aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the welding control method is implemented.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adds an arc stabilization stage to the original pulse welding process, so that the welding process forms a periodic welding control. In the arc stabilization stage, the welding wire stays and penetrates into the molten pool, so that the molten pool can be calmed to improve stability. Therefore, during the entire welding process, the periodic continuous control can keep the molten pool stable, thereby achieving a better quality fish scale pattern welding appearance.

[0015] 2. In the arc stabilization stage of the present invention, corresponding processing methods are pre-set for emergency processing when facing short circuits or arcing other than preset conditions, thereby ensuring that the entire welding control can be carried out stably and automatically without excessive human intervention.

[0016] 3. The present invention achieves a perfect fish-scale welding effect by adding a pilot arc stage during the pulse welding process. The addition of the pilot arc stage reduces the amount of welding wire filling and energy, stabilizes the molten pool, and can form a beautiful fish-scale weld appearance within a larger specification range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the control method in Example 1; Figure 2 is a schematic diagram of the control method in Example 1; Figure 3 for Figure 2 The overall schematic diagram of the situation in which a short circuit occurs in the first stage; Figure 4 for Figure 2 The overall schematic diagram of the arcing situation in the third stage. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood 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 accompanying 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 operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0019] In the prior art known to the inventor of the present application, fish scale pattern forming can avoid the post-welding treatment method and can also increase the aesthetics of the product after welding, but the fish scale pattern has high requirements for the stability of the molten pool. Most of the fish scale pattern welding methods in the prior art adopt the periodic switching of high and low pulses, the periodic switching of pulses and short circuits, and the periodic switching of pulses / short circuits and arc breaking. There is a lack of specific control schemes for the control of wire feeding speed and arc burning and arc extinguishing, which makes it difficult to ensure the quality of fish scale pattern welding. For example, the vibration of the molten pool during the welding process will affect the quality of the fish scale pattern, and there are textures on the surface of the fish scale pattern.

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example 1

[0021] like Figure 1-4 The present invention achieves the fish scale welding effect by adding a pilot arc stage during the pulse welding process. The addition of the pilot arc stage reduces the amount of welding wire filling and energy, stabilizes the molten pool, and can form a beautiful fish scale weld appearance. The specific implementation method is as follows: Combination Figure 1In this embodiment, a fish scale welding control method is provided, which is mainly used for fish scale welding, and includes a plurality of 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 to each welding cycle. The welding quality of the fish scale can be improved through periodic stable output.

[0022] Usually, within each welding cycle, the time occupied by the pulse stage and the arc stabilization stage in the welding cycle is calculated and determined based on the pre-read pulse parameters, for example, based on the pulse current, frequency and duty cycle, etc. The frequency is the inverse of the welding cycle, and the duty cycle is the proportion of the pulse stage to the welding cycle. The specific calculation method for the time of the pulse stage and the arc stabilization stage can be determined based on the results obtained from a large number of tests, or can be manually set according to the specific welding workpiece type and welding requirements, and this embodiment does not make specific limitations. In a specific embodiment, the time T1 of the pulse stage ranges from 100ms to 1000ms, and the time T2 of the arc stabilization stage ranges from 100ms to 1000ms.

[0023] Combination Figure 2 The arc stabilization stage includes a first stage, a second stage, a third stage and a fourth stage which are performed sequentially; the first stage, the second stage, the third stage and the fourth stage are performed sequentially within a preset arc stabilization stage time.

[0024] Step S1: In the first stage, the welding wire is fed forward and the arc keeps burning. If a short circuit arc is detected in the first stage, the wire feeding is stopped to allow the arc to reignite.

[0025] The first stage is carried out after the pulse stage of the current welding cycle. After the pulse stage, the welding current is reduced from the pulse base current IBA to the first current I1, where the range of IBA is 15A~200A, and the wire feeding speed is also reduced from the first speed V1 to the second speed V2; the first stage maintains the output of the first current I1 and feeds the wire at the second speed V2, while the arc keeps burning. The first current I1, the first speed V1 and the second speed V2 are all preset values ​​based on experimental verification.

[0026] In a specific embodiment, the first current I1 is in the range of 10A to 50A, the first speed V1 is in the range of 1.0m / min to 25m / min, and the second speed V2 is in the range of 0m / min to 5m / min. The specific values ​​can also be obtained by calibration according to actual welding conditions, and this embodiment does not make specific limitations.

[0027] In a specific embodiment, the duration of the first stage is preset, and the end of the last pulse of the previous pulse stage is used as the timing starting point. After reaching the preset third time T3, the first stage ends and enters the second stage. The third time T3 preset here can be determined based on a large amount of experimental experience according to the specific welding workpiece type and welding requirements. In a specific embodiment, the third time T3 is a preset value, and the range of the third time T3 is 10ms~100ms. In some other specific embodiments, in special welding scenarios or welding requirements, the end timing of the first stage can also be manually controlled.

[0028] It is worth noting that, in an ideal state, the arc can keep burning as set in the first stage. However, in actual operation, due to deviations in wire feeding speed or current command output, a short circuit may occur and the arc may be extinguished.

[0029] In a specific embodiment, an early warning message can be sent to the welder at this time. If the wire feeding speed or current instruction is obviously abnormal, the welder needs to stop the welding operation in time to avoid the production of defective products and protect the welding machine. Figure 3 If the short circuit is caused by a slight deviation, a pre-set processing method can be used to promptly process it without stopping welding to ensure welding efficiency. The processing method at this time is: in the first stage, in response to the detection of a short circuit, the wire feeding is stopped and the welding current is increased by a preset value ΔI from the first current I1 to reach a third current. After the arc is reignited, the third current output is maintained without being adjusted back to the first current I1. The range of the preset value ΔI is 0A~50A.

[0030] The purpose of stopping wire feeding is to stop further feeding and filling of welding wire in time, and the purpose of increasing welding current is to quickly ignite the arc to restore to the preset normal state, so as to reduce adverse effects as much as possible so as to enter the subsequent second stage. Under normal conditions, the first stage still ends at the preset third time. If the arc has not reignited when the third time arrives, the welder needs to intervene manually to adjust it. After the adjustment is restored to the original state, welding will be restarted from the pulse stage of the welding cycle.

[0031] Furthermore, at the end of the first stage, the arc still keeps burning, and the second stage is entered. Step S2: In the second stage, the welding wire is fed forward to contact the molten pool to short-circuit so as to extinguish the arc, and the feeding is stopped after a delay after the arc is extinguished.

[0032] Specifically, the purpose of the second stage is to quickly achieve short circuit and extinguish the arc, so as to provide more duration for the subsequent welding wire to stay. And after the short circuit is detected, the welding wire stops feeding for a long time, and the part of the welding wire that continues to feed can provide more filling amount and make the welding wire contact with the molten pool more fully.

[0033] In a specific embodiment, after the first stage ends and enters the second stage, the wire feeding speed is increased from the second speed V2 to the third speed V3 to accelerate the wire feeding in the forward direction, so that the welding wire quickly contacts the molten pool to cause a short circuit, and the arc is extinguished. In response to the detection of the short circuit, the welding current increases from the first current I1 (if the short circuit is detected in the first stage, it should be the third current here) to the second current I2, while the third speed V3 is maintained to feed the wire in the forward direction and the feeding is stopped for a preset fifth time T5.

[0034] Here, the purpose of increasing the welding current is to avoid arc breaking at the moment of subsequent arc retraction, and to facilitate the detachment of the molten droplets during the output of the next welding stage. Generally, the larger the welding current, the more beneficial it is for the detachment of the 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 arcing, and the calming effect of the molten pool is poor.

[0035] The third speed V3 and the second current I2 are preset values, the range of V3 is 10m / min~60m / min, and the range of I2 is 30A~150A; they can be set according to the type of welding workpiece and welding requirements based on a large amount of test data.

[0036] In the second stage, after the short circuit is detected, the wire feeding is stopped for a preset fifth time T5 to enter the third stage. The range of T5 is 0ms~20ms.

[0037] Step S3: In the third stage, the wire feeding is 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.

[0038] In the third stage, the welding current maintains the second current I2 unchanged when the welding wire remains stopped. The purpose of the third stage is to keep the welding wire in full contact with the molten pool, thereby avoiding vibration and ensuring the stability of the molten pool. In addition, the welding wire that remains in contact with the molten pool can also dissipate heat from the molten pool to achieve the purpose of reducing heat input, so that the welding heat is lower, which is more suitable for welding occasions with high requirements for the appearance of thin plates.

[0039] In a specific embodiment, since the time for detecting a short circuit is not fixed, if the second stage is set to a certain time, the amount of welding wire continuously fed after the short circuit may be insufficient. For the convenience of control, in this embodiment, the sum of the time the welding wire stays in the third stage and the duration of the second stage is preset, and the fourth stage is entered when the sum of the time of the second stage and the third stage reaches a preset fourth time T4. The range of the fourth time T4 is 20ms~150ms.

[0040] That is, the wire stay time is affected by the time of the second stage. If the short circuit is detected early in the second stage, the wire stay time is extended accordingly to further calm the molten pool. If the short circuit is detected late in the second stage, the wire stay time is 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.

[0041] According to the preset ideal state, in the third stage, the arc is kept extinguished to calm the molten pool. However, in the actual operation process, affected by the wire feed speed deviation and the welding current output deviation, the arc may still reignite in the third stage. If the arc reignites, it is certainly possible to intervene in time by the welder, but this will significantly increase the workload of the welder in the periodic welding control. Therefore, in a specific embodiment, a corresponding processing method is used to deal with this situation. Specifically, combined 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, and the wire feeding is stopped at the fifth delay time T5 after the short-circuit detection. The delayed stop of wire feeding can still ensure that the welding wire is in full contact with the molten pool to calm the molten pool, thereby restoring to the original state of the third stage before arcing.

[0042] Then, immediately following the above, the fourth stage begins after the sum of the time the welding wire stays in the third stage and the duration of the second stage reaches a preset fourth time T4. Step S4: In the fourth stage, the welding wire is reversely retracted to reignite the arc and the retraction is stopped after the arc is detected to enter the pulse stage of the next welding cycle.

[0043] The purpose of the fourth stage is to reversely withdraw the welding wire to reignite the arc. The speed of the reverse withdrawal of the welding wire is a preset fourth speed T4, and the range of the fourth speed T4 is 10m / min~60m / min.

[0044] After arcing is detected in the fourth stage, the withdrawal is stopped for a preset sixth time T6 to enter the pulse stage of the next welding cycle. The range of the sixth time T6 is 0ms~20ms. It can be understood that the fourth stage belongs to the transition to the next pulse stage. Reverse wire drawing can make the welding wire leave the molten pool and the arc reignite. At this time, the welding current still maintains the second current I2 unchanged. After arcing is detected, the withdrawal is stopped for a delay to keep a certain distance between the welding wire and the molten pool and keep the arc stable. After the preset seventh time T7 after checking the arcing, the first pulse output of the next pulse stage is entered. At this point, the two adjacent welding cycles complete the transition, so that stable and continuous control can be achieved during the entire welding process. The range of the seventh time T7 is 0ms~20ms.

[0045] Moreover, when the welding control is highly automated, fish scale patterns of better quality can be obtained without human intervention except in extreme fault conditions. In actual operation, welding current waveform designs in the pulse stage and the arc stabilization stage may be different for welding wires of different wire diameters, shielding gases or current values.

[0046] Short circuit detection is performed when the arc keeps burning in the first stage and when the welding wire is fed forward in the second stage; the short circuit detection includes: collecting the welding voltage output by the welding machine, and in response to the welding voltage being less than a preset voltage threshold or the voltage change rate of the welding voltage being less than a preset change rate threshold, and the duration being greater than a preset time threshold, it is determined as a short circuit detection.

[0047] When the arc remains extinguished in the third stage, and when the welding wire is reversely withdrawn in the fourth stage, arc detection is performed; the arc detection includes: collecting the welding voltage output by the welding machine, and responding to the welding voltage being greater than a preset voltage threshold or the voltage change rate of the welding voltage being greater than a preset change rate threshold, and the duration being greater than a preset time threshold, it is determined that arc detection is performed. The preset voltage threshold, change rate threshold, and preset time threshold can all be determined based on experiments, and are not specifically limited in this embodiment. In this way, short circuits and arcing can be detected accurately and timely. Example 2

[0048] Based on the same inventive concept as in Example 1, in one embodiment of the present application, the present application further discloses a welding machine, comprising: a memory for storing instructions; a processor for executing the instructions, so that the welding machine performs 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: the above at least one processor, the above at least one memory, and a bus connecting different system components (including the memory and the processor). Among them, the processor may be connected to the welding part of the welding machine, and the welding part is used to generate heat in response to the welding current output by the processor to achieve welding of the workpiece.

[0049] The memory stores program codes, which can be executed by the processor, so that the processor performs the steps of various exemplary embodiments of the present invention described in the above "Exemplary Method" section of this specification. For example, the processor can perform the following steps: Figure 1 The steps shown. The memory may include a readable medium in the form of a volatile memory, such as a random access memory (RAM) and / or a cache memory, and may further include a read-only memory (ROM). The memory may also include a program / utility having a set (at least one) of program modules, such program modules including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of these examples or some combination may include the implementation of a network environment. The bus may represent one or more of several types of bus structures, including a memory bus or a memory controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of a variety of bus structures.

[0050] The welder may also communicate with one or more external devices (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable a user to interact with the welder, and / or any device that enables the welder to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface. Furthermore, the welder may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter. The network adapter communicates with other modules of the welder via a bus. Example 3

[0051] Based on the same inventive concept as in Example 1, this embodiment provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the welding control method is implemented.

[0052] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented 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.

[0053] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0054] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0055] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0056] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fish scale welding control method, characterized in that: The method comprises a plurality of welding cycles which are performed continuously, wherein the welding cycle comprises a pulse phase and an arc stabilization phase, wherein the arc stabilization phase comprises a first phase, a second phase, a third phase and a fourth phase which are performed sequentially, and the first phase is entered in response to the end of the pulse phase of the current welding cycle; In the first stage, the welding wire is fed forward and the arc is kept burning to enter the second stage. If a short circuit is detected in the first stage, the wire feeding is stopped to allow the arc to reignite. In the second stage, the welding wire is fed forward to contact the molten pool to cause short circuit and arc extinguishing, and the feeding is stopped after the arc is extinguished to enter the third stage; In the third stage, the wire feeding is stopped and the arc is extinguished to enter the fourth stage; if arcing is detected in the third stage, the welding wire is fed forward to extinguish the arc; In the fourth stage, the welding wire is reversely retracted to reignite the arc and the retraction is stopped after the arc is detected, so as to enter the pulse stage of the next welding cycle.

2. The fish scale welding control method according to claim 1, characterized in that: The wire is fed forward at a first speed during the pulse stage; the first stage is entered after the last pulse of the pulse stage ends, and the welding current is reduced from the pulse base current to the first current.

3. A fish scale welding control method according to claim 2, characterized in that: In the first stage, when no short circuit is detected, the first current is output and the wire is fed at the preset second speed; 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 a third current so that the arc is reignited; After the arc reignites, the third current output is maintained, and wire feeding is stopped until the duration of the first stage reaches a preset third time to enter the second stage.

4. The fish scale welding control method according to claim 3, characterized in that: The first speed is greater than the second speed, and the pulse base current is greater than the first current.

5. The fish scale welding control method according to claim 3, characterized in that: In the second stage, the welding wire is fed forward at a third speed, and the third speed is greater than the second speed; In the second stage, after the short circuit is detected, the wire feeding is stopped for a preset fifth time to enter the third stage; If no short circuit is detected in the first stage, the second stage outputs a first current before the short circuit occurs, and outputs a second current after the short circuit occurs; 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.

6. The fish scale welding control method according to claim 5, characterized in that: In the third stage, when arcing is not detected, the second current is output and the wire feeding speed is kept at zero; In the third stage, when arcing is detected, the welding wire is fed forward at a third speed to short-circuit and extinguish the arc again; After the short circuit is detected, the wire feeding is stopped for a preset fifth time, and the fourth stage is entered when the sum of the time of the second stage and the third stage reaches a preset fourth time.

7. A fish scale welding control method according to claim 6, characterized in that: After arcing is detected in the fourth stage, the retraction is stopped for a preset sixth time to enter the pulse stage of the next welding cycle.

8. The fish scale welding control method according to claim 1, characterized in that: When the arc is kept burning in the first stage, and when the welding wire is fed forward in the second stage, short circuit detection is performed; the short circuit detection includes: Collect the welding voltage output by the welding machine, In response to the welding voltage being less than a preset voltage threshold or the voltage change rate of the welding voltage being less than a preset change rate threshold, and the duration being greater than a preset time threshold, it is determined that a short circuit is detected; When the arc is kept extinguished in the third stage, and when the welding wire is reversely withdrawn in the fourth stage, arc detection is performed; the arc detection includes: The welding voltage output by the welding machine is collected. In response to the welding voltage being greater than a preset voltage threshold or the voltage change rate of the welding voltage being greater than a preset change rate threshold, and the duration being greater than a preset time threshold, it is determined that arcing is detected.

9. A welding machine, characterized in that: include: A memory for storing instructions; The processor is used to execute the instruction so that the welding machine performs the operation of implementing the welding control method according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the welding control method as described in any one of claims 1 to 8 is implemented.

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