Welding control parameter adjusting method, electronic equipment and storage medium

Abstract

The invention provides a welding control parameter adjusting method, electronic equipment and a storage medium, and the method comprises the following steps: determining a target current frequency and a target thrust current value according to the short-circuit duration of a direct-current electric welding machine during welding work in a first time period; determining a key current frequency according to a difference value between each adjustment current frequency and the target current frequency; determining a key thrust current value according to a difference value between each adjustment thrust current value and the target thrust current value; the output frequency and the thrust current value of the welding current of the direct-current electric welding machine are adjusted to be the key current frequency and the key thrust current value; and according to the short-circuit duration of the positive electrode and the negative electrode of the direct-current electric welding machine during welding work in the second time period, the output frequency and the thrust current value of the welding current of the direct-current electric welding machine are finely adjusted, so that the short-circuit duration of the direct-current electric welding machine during welding work is maintained within the preset duration range, manual adjustment by workers is not needed, and the working efficiency is improved. And the data adjustment precision is improved.

Description

Technical Field

[0001] This invention relates to the field of welding, and in particular to a method for adjusting welding control parameters, an electronic device, and a storage medium. Background Technology

[0002] When using a DC welding machine, operators need to manually adjust the output frequency of the thrust current and welding current of the DC welding machine based on the real-time short-circuit status between the positive and negative terminals. This ensures the short-circuit duration is within a set range. (The short-circuit duration is the time the welding electrode adheres to the workpiece during welding. Too short an adhesion time may result in incomplete weld fusion and insufficient strength; too long an adhesion time may cause overheating, burn-through, or weld deformation, also reducing weld quality. Therefore, controlling the electrode adhesion time within a reasonable range is crucial in DC welding operations.) Within a certain time frame, to ensure the welding quality of the workpiece, this method of manually adjusting the parameters of the DC welding machine relies heavily on the operator's professional skill level. For highly skilled operators, they can manually adjust the control parameters of the DC welding machine based on their work experience. However, for operators with average professional skills, the welding quality of the workpiece is likely to be poor because the control parameters of the DC welding machine are not adjusted to the appropriate range. Therefore, this method of manually adjusting the control parameters of the DC welding machine has high limitations, and the difference in the adjustment of control parameters due to the difference in the professional skill level of each operator will affect the welding quality of the workpiece. Summary of the Invention

[0003] To address the aforementioned technical problems, the technical solution adopted by this invention is as follows: According to one aspect of this application, a welding control parameter adjustment method is provided, applied to a DC welding machine; The methods for adjusting welding control parameters include: Step S100: Based on the short-circuit duration of the positive and negative poles of the DC welding machine during the first time period and the type of welding rod connected to the DC welding machine, determine the target current frequency and target thrust current value of the DC welding machine. The first time period begins when the DC welding machine starts its first welding operation after the welding rod is connected; the first time period ends when the target current frequency and target thrust current value of the DC welding machine are determined; the duration of the first time period is a preset duration. Step S200: Determine the critical current frequency from several adjustment current frequencies based on the difference between each adjustment current frequency and the target current frequency corresponding to the welding electrode. Step S300: Determine the key thrust current value from several adjusted thrust current values ​​based on the difference between each adjusted thrust current value and the target thrust current value corresponding to the welding electrode. Step S400: Adjust the output frequency of the welding current of the DC welding machine to the critical current frequency; Step S500: Adjust the thrust current value of the DC welding machine to the critical thrust current value; Step S600: Based on the short-circuit duration of the positive and negative poles during the welding operation of the DC welding machine in the second time period, fine-tune the output frequency and thrust current value of the welding current of the DC welding machine so that the corresponding short-circuit duration of the DC welding machine is within the preset duration range. The second time period begins when the thrust current value of the DC welding machine is adjusted to the critical thrust current value; the second time period ends at the current moment.

[0004] According to another aspect of this application, a non-transitory computer-readable storage medium is provided, wherein the storage medium stores at least one instruction or at least one program segment, the at least one instruction or the at least one program segment being loaded and executed by a processor to implement the aforementioned welding control parameter adjustment method.

[0005] According to another aspect of this application, an electronic device is provided, including a processor and the aforementioned non-transitory computer-readable storage medium.

[0006] The present invention has at least the following beneficial effects: The welding control parameter adjustment method of the present invention first determines the target current frequency and target thrust current value of the DC welding machine based on the short-circuit duration of the positive and negative short circuits during the welding operation of the DC welding machine in the first time period, and the type of welding rod connected to the DC welding machine. Then, based on the difference between each adjustable current frequency and the target current frequency corresponding to the welding rod, a critical current frequency is determined from several adjustable current frequencies. Similarly, based on the difference between each adjustable thrust current value and the target thrust current value corresponding to the welding rod, a critical thrust current value is determined from several adjustable thrust current values. Finally, the output frequency of the welding current of the DC welding machine is adjusted to the critical current frequency, and the thrust current value of the DC welding machine is adjusted to the critical thrust current value, so that the DC welding machine... The output frequency and thrust current value of the welding current of the electric welding machine can be quickly adjusted to be close to the target current frequency and target thrust current value without affecting the welding quality. Then, based on the short-circuit duration of the positive and negative poles during the second welding period, the output frequency and thrust current value of the welding current of the DC welding machine are finely adjusted to ensure that the corresponding short-circuit duration is within the specified range. By automatically adjusting the output frequency and thrust current value of the welding current of the DC welding machine in two stages, the short-circuit duration during welding is maintained within the preset duration range, eliminating the need for manual adjustment by the operator. This improves the accuracy of data adjustment while ensuring welding quality. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 A flowchart of a welding control parameter adjustment method provided in an embodiment of the present invention. Detailed Implementation

[0009] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0010] This application proposes a method for adjusting welding control parameters, applicable to DC welding machines, such as... Figure 1 As shown, the methods for adjusting welding control parameters include: Step S100: Based on the short-circuit duration of the positive and negative poles of the DC welding machine during the first time period and the type of welding rod connected to the DC welding machine, determine the target current frequency and target thrust current value of the DC welding machine. The first time period begins when the DC welding machine starts its first welding operation after connecting the welding rod, and ends when the target current frequency and target thrust current value of the DC welding machine are determined. The duration of the first time period is a preset duration.

[0011] The short-circuit duration of the positive and negative electrodes is the duration during which the welding electrodes stick together. The corresponding electrode type is the type of welding electrode classified according to the type of coating or welding current, such as acidic welding electrodes, basic welding electrodes, cellulose welding electrodes, etc.

[0012] Furthermore, step S100 includes steps S110-S120: Step S110: In response to receiving the welding current value input by the user, determine the type of welding electrode corresponding to the welding electrode based on the extreme points connected to the welding electrode on the DC welding machine; Step S110 includes step S111: Step S111: If the welding rod is connected to the negative terminal of the DC welding machine, then the welding rod type is determined to be the first type. If the welding electrode is connected to the positive terminal of the DC welding machine, and there is a thrust current during the welding operation of the DC welding machine in the first time period, then the welding electrode type is determined to be the second type. If the welding electrode is connected to the positive terminal of the DC welding machine, and there is no thrust current during the welding operation of the DC welding machine in the first time period, then the welding electrode type is determined to be the third type.

[0013] As a feasible embodiment, the first type can be an acidic welding electrode, the second type can be an alkaline welding electrode, and the third type can be a cellulose-based welding electrode. Each welding electrode type has a different wiring method and thrust current intervention method. Therefore, the type of welding electrode used by the user can be determined by connecting the welding electrode to the extreme end of the DC welding machine. Since there is a linear relationship between the length of the welding electrode and the welding current value, the shorter the welding electrode length, the lower the resistance of the welding electrode, and the higher the corresponding welding current value. Therefore, a mapping table can be set up to store the mapping relationship between several welding electrode lengths and several welding current values. That is, when the welding electrode length is a certain value, the corresponding welding current value is a certain value. When the user inputs the welding current value, the corresponding welding electrode length will be found in the mapping table according to the welding current value, so as to know the length of the welding electrode used by the user, which helps to adjust the control parameters of the DC welding machine in the future.

[0014] Step S120: Based on the type of welding electrode and the short-circuit duration of the positive and negative poles of the DC welding machine during the first time period, determine the target current frequency and target thrust current value of the DC welding machine from the preset adjustment mapping table.

[0015] Adjust the mapping relationship between several short-circuit durations, several welding electrode types, several current frequencies, and several thrust current values ​​stored in the mapping table.

[0016] Step S120 includes steps S121-S124: Step S121: Obtain the short-circuit duration of several instances of positive and negative short circuits during the welding operation of the DC welding machine in the first time period, to obtain a short-circuit duration list A=(A1,A2,...,A...). g ,...,A h ); where g=1,2,...,h; h is the number of positive and negative short circuits that occur during the first welding operation of the DC welding machine; A g This refers to the short-circuit duration when the g-th positive and negative short circuit occurs during the welding operation of the DC welding machine in the first time period. Step S122: Based on the short-circuit duration list A, determine the target short-circuit duration T0 of the DC welding machine in the first time period = ∑ h g=1 A g / h; Step S123: Obtain several mapping lists stored in the adjustment mapping table to obtain a mapping list set B=(B1,B2,...,B i ,...,B n ); where i = 1, 2, ..., n; n is the number of mapping lists stored in the adjustment mapping table; B i To adjust the i-th mapping list stored in the mapping table; B i =(B i1 B i2 B i3 B i4 );B i1 B is the type identifier corresponding to the electrode type in the i-th mapping list; i2 B represents the short-circuit duration range in the i-th mapping list; i2 =(B i21 B i22 );B i21 For B i2 The corresponding minimum short-circuit duration; B i22 For B i2 The corresponding maximum short-circuit duration; B i3 B represents the current frequency in the i-th mapping list; i4The thrust current value is in the i-th mapping list; Step S124: Traverse the mapping list set B, if B i1 The corresponding electrode type is the electrode type corresponding to the electrode, and B i21 <T0<B i22 Then B i3 Determine the target current frequency corresponding to the DC welding machine, and set B i4 The target thrust current value corresponding to the DC welding machine was determined.

[0017] The target current frequency and target thrust current value are the target values ​​for adjusting the output frequency and thrust current value of the welding current of the DC welding machine. That is, the target current frequency is the output frequency of the welding current suitable for welding work of the welding electrode, which is determined according to the length and type of the welding electrode. The target thrust current value is the thrust current value suitable for welding work of the welding electrode, which is determined according to the length and type of the welding electrode. In other words, under the target current frequency and target thrust current value, the DC welding machine can control the adhesion time of the connected welding electrode in the welding work within the preset time range.

[0018] Step S200: Determine the critical current frequency from several adjustment current frequencies based on the difference between each adjustment current frequency and the target current frequency corresponding to the welding electrode. Furthermore, step S200 includes steps S210-S230: Step S210: Obtain several adjustable current frequencies corresponding to the electrode type to obtain an adjustable current frequency list C=(C1,C2,...,C j ,...,C k ); where j=1,2,...,k; k is the number of adjustment current frequencies corresponding to the electrode type; C j The j-th adjustment current frequency corresponding to the electrode type; Step S220: Based on the adjustment current frequency list C, determine the difference between the target current frequency and each adjustment current frequency to obtain the current frequency difference list D=(D1,D2,...,D...). j ,...,D k ); where D j D is the difference between the target current frequency and the j-th adjustment current frequency. j =|C0-C j |;C0 is the target current frequency; Step S230: Determine the adjustment current frequency corresponding to MIN(D) as the key current frequency; where MIN() is a preset minimum value determination function.

[0019] Step S300: Determine the key thrust current value from several adjusted thrust current values ​​based on the difference between each adjusted thrust current value and the target thrust current value corresponding to the welding electrode. Furthermore, step S300 includes steps S310-S330: Step S310: Obtain several adjustment thrust current values ​​corresponding to the electrode type to obtain an adjustment thrust current value list E=(E1,E2,...,E r ,...,E t ); where r = 1, 2, ..., t; t is the number of adjustment thrust current values ​​corresponding to the electrode type; E r The r-th adjustment thrust current value corresponding to the electrode type; Step S320: Based on the thrust current adjustment value list E, determine the difference between the target thrust current value and each adjusted thrust current value to obtain the thrust current difference value list F=(F1,F2,...,F...). r ,...,F t ); where F r F is the difference between the target thrust current value and the r-th adjusted thrust current value. r =|E0-E r |; E0 is the target thrust current value; Step S330: Determine the adjustment thrust current value corresponding to MIN(F) as the key thrust current value.

[0020] The adjusted current frequency and thrust current values ​​are preset based on the welding current output frequency and thrust current values ​​according to the electrode type. Different electrode types correspond to different adjusted current frequencies and thrust current values. During welding, when a large range of adjustments to the DC welding machine's welding current output frequency and thrust current value is required (i.e., a large adjustment range), these two control parameters cannot be adjusted slowly (if the control parameters are adjusted slowly, the welding state of the electrode will also change slowly, affecting the welding effect and reducing welding quality). Therefore, it is necessary to set multiple adjusted current frequencies and thrust current values ​​according to different electrode types. Each adjusted current frequency and thrust current value can be represented as a gear. When the current frequency and thrust current need to be adjusted, they can be adjusted to the corresponding adjusted current frequency and thrust current value first to achieve instantaneous adjustment of the current frequency and thrust current, avoiding a decrease in welding quality due to slow parameter adjustments.

[0021] Step S400: Adjust the output frequency of the welding current of the DC welding machine to the critical current frequency; Step S500: Adjust the thrust current value of the DC welding machine to the critical thrust current value; In this embodiment, the critical current frequency and critical thrust current value are first determined. The critical current frequency is the adjustment current frequency closest to the target current frequency, and the critical thrust current value is the adjustment thrust current value closest to the target thrust current value. Then, the output frequency of the welding current of the DC welding machine is adjusted to the critical current frequency, and the thrust current value of the DC welding machine is adjusted to the critical thrust current value. This step can be regarded as a coarse adjustment of the control parameters of the DC welding machine. According to the preset mapping table, the critical current frequency and critical thrust current value can be determined, and the output frequency and thrust current value of the welding current of the DC welding machine can be instantly adjusted to the critical current frequency and critical thrust current value. Users do not need to repeatedly adjust the current frequency and thrust current based on their work experience. This improves the adjustment accuracy of the control parameters and avoids the problem of welding quality degradation caused by repeated adjustments.

[0022] Step S600: Based on the short-circuit duration of the positive and negative poles during the welding operation of the DC welding machine in the second time period, fine-tune the output frequency and thrust current value of the welding current of the DC welding machine so that the corresponding short-circuit duration of the DC welding machine is within the preset duration range. The second time period begins when the thrust current value of the DC welding machine is adjusted to the critical thrust current value, and ends at the current time.

[0023] Furthermore, step S600 includes steps S610-S620: Step S610: If a short circuit occurs between the positive and negative poles during the welding operation of the DC welding machine in the second time period, obtain the short circuit duration T1 of the DC welding machine when the short circuit occurs. Step S620: If T1 is within the preset time range, adjust the output frequency of the welding current of the DC welding machine to the target current frequency, and adjust the thrust current value of the DC welding machine to the target thrust current value. Step S621: If T1 is not within the preset time range, obtain the standard current frequency and standard thrust current value corresponding to the electrode type. Step S622: Adjust the output frequency of the welding current of the DC welding machine towards the standard current frequency, and adjust the thrust current value of the DC welding machine towards the standard thrust current value. During the adjustment of the output frequency and thrust current value of the welding current of the DC welding machine, the short-circuit duration of the positive and negative poles of the DC welding machine when a short circuit occurs is obtained in real time. When the short-circuit duration is within the preset duration range, stop adjusting the output frequency and thrust current value of the welding current of the DC welding machine.

[0024] After adjusting the output frequency and thrust current value of the DC welding machine to the critical current frequency and critical thrust current value (i.e., coarse adjustment of the control parameters of the DC welding machine), in order to keep the electrode adhesion time within the preset range, it is necessary to fine-tune the control parameters of the DC welding machine in real time based on the obtained short-circuit time (i.e., fine adjustment) to ensure that the electrode adhesion time is within the preset range. Since the output frequency and thrust current value of the DC welding machine are close to the target current frequency and target thrust current value after the coarse adjustment, and the range of fine adjustment of the control parameters is small, even if the control parameters of the DC welding machine are slowly fine-tuned, the impact on the welding quality is small. Moreover, the fine-tuning control of the control parameters of the DC welding machine is also automated and does not require user intervention, thus further improving the adjustment accuracy of the control parameters.

[0025] The welding control parameter adjustment method of the present invention first determines the target current frequency and target thrust current value of the DC welding machine based on the short-circuit duration of the positive and negative short circuits during the welding operation of the DC welding machine in the first time period, and the type of welding rod connected to the DC welding machine. Then, based on the difference between each adjustable current frequency and the target current frequency corresponding to the welding rod, a critical current frequency is determined from several adjustable current frequencies. Similarly, based on the difference between each adjustable thrust current value and the target thrust current value corresponding to the welding rod, a critical thrust current value is determined from several adjustable thrust current values. Finally, the output frequency of the welding current of the DC welding machine is adjusted to the critical current frequency, and the thrust current value of the DC welding machine is adjusted to the critical thrust current value, so that the DC welding machine... The output frequency and thrust current value of the welding current of the electric welding machine can be quickly adjusted to be close to the target current frequency and target thrust current value without affecting the welding quality. Then, based on the short-circuit duration of the positive and negative poles during the second welding period, the output frequency and thrust current value of the welding current of the DC welding machine are finely adjusted to ensure that the corresponding short-circuit duration is within the specified range. By automatically adjusting the output frequency and thrust current value of the welding current of the DC welding machine in two stages, the short-circuit duration during welding is maintained within the preset duration range, eliminating the need for manual adjustment by the operator. This improves the accuracy of data adjustment while ensuring welding quality.

[0026] Embodiments of the present invention also provide a computer program product including program code, which, when the program product is run on an electronic device, causes the electronic device to perform the steps of the methods described above in various exemplary embodiments of the present invention.

[0027] Furthermore, although the steps of the method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0028] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, mobile terminal, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0029] In an exemplary embodiment of this disclosure, an electronic device capable of implementing the above-described method is also provided.

[0030] Those skilled in the art will understand that various aspects of the present invention can be implemented as systems, methods, or program products. Therefore, various aspects of the present invention can be specifically implemented in the following forms: entirely in hardware, entirely in software (including firmware, microcode, etc.), or in a combination of hardware and software, collectively referred to herein as “circuit,” “module,” or “system.”

[0031] An electronic device according to this embodiment of the invention. The electronic device is merely an example and should not be construed as limiting the functionality or scope of the embodiments of the invention.

[0032] Electronic devices are manifested in the form of general-purpose computing devices. Components of an electronic device may include, but are not limited to: at least one processor, at least one memory, and buses connecting different system components (including memory and processor).

[0033] The storage device stores program code that can be executed by the processor to perform the steps described in the "Exemplary Methods" section above, according to various exemplary embodiments of the present invention.

[0034] The storage may include readable media in the form of volatile storage, such as random access memory (RAM) and / or cache memory, and may further include read-only memory (ROM).

[0035] The storage 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 applications, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0036] A bus can represent one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus that uses any of the various bus architectures.

[0037] Electronic devices can also communicate with one or more external devices (such as keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable users to interact with the electronic device, and / or any device that enables the electronic device to communicate with one or more other computing devices (such as routers, modems, etc.). This communication can be performed through input / output (I / O) interfaces. Furthermore, electronic devices can also 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 network adapters.

[0038] In exemplary embodiments of this disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the methods described above is stored. In some possible embodiments, various aspects of the invention may also be implemented as a program product comprising program code that, when the program product is run on a terminal device, causes the terminal device to perform the steps of the various exemplary embodiments of the invention described in the "Exemplary Methods" section of this specification.

[0039] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0040] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0041] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0042] Program code for performing the operations of this invention can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0043] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0044] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0045] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for adjusting welding control parameters, characterized in that, Applications in DC welding machines; The method for adjusting the welding control parameters includes: Step S100: Based on the short-circuit duration of the positive and negative poles of the DC welding machine during the first time period and the type of welding rod connected to the DC welding machine, determine the target current frequency and target thrust current value of the DC welding machine. The start time of the first time period is the start time of the first welding operation of the DC welding machine after the welding rod is connected; the end time of the first time period is the time when the target current frequency and target thrust current value of the DC welding machine are determined; the duration of the first time period is a preset duration. Step S200: Determine the key current frequency from a plurality of the adjusted current frequencies based on the difference between each adjusted current frequency corresponding to the welding electrode and the target current frequency. Step S300: Determine the key thrust current value from a plurality of adjusted thrust current values ​​based on the difference between each adjusted thrust current value corresponding to the welding electrode and the target thrust current value. Step S400: Adjust the output frequency of the welding current of the DC welding machine to the critical current frequency; Step S500: Adjust the thrust current value of the DC welding machine to the critical thrust current value; Step S600: Based on the short-circuit duration of the positive and negative poles during the welding operation of the DC welding machine in the second time period, fine-tune the output frequency and thrust current value of the welding current of the DC welding machine so that the short-circuit duration of the DC welding machine is within the preset duration range. The second time period begins when the thrust current value of the DC welding machine is adjusted to the critical thrust current value; the second time period ends at the current time.

2. The method according to claim 1, characterized in that, Step S100 includes: Step S110: In response to receiving the welding current value input by the user, determine the type of welding electrode corresponding to the welding electrode based on the extreme terminals connected to the welding electrode on the DC welding machine; Step S120: Based on the type of welding electrode and the short-circuit duration of the positive and negative poles of the DC welding machine during the first time period, determine the target current frequency and target thrust current value of the DC welding machine from a preset adjustment mapping table; the adjustment mapping table stores the mapping relationship between several short-circuit durations, several welding electrode types, several current frequencies and several thrust current values.

3. The method according to claim 2, characterized in that, Step S110 includes: Step S111: If the welding electrode is connected to the negative terminal of the DC welding machine, then the welding electrode type corresponding to the welding electrode is determined to be the first type; If the welding electrode is connected to the positive terminal of the DC welding machine, and a thrust current is involved when the DC welding machine performs welding work in the first time period, then the welding electrode type corresponding to the welding electrode is determined to be the second type. If the welding electrode is connected to the positive terminal of the DC welding machine, and there is no thrust current during the welding operation of the DC welding machine in the first time period, then the welding electrode type corresponding to the welding electrode is determined to be the third type.

4. The method according to claim 3, characterized in that, Step S120 includes: Step S121: Obtain the short-circuit duration of several instances of positive and negative short circuits during the welding operation of the DC welding machine in the first time period, to obtain a short-circuit duration list A=(A1,A2,...,A1). g ,...,A h ); where g=1,2,...,h; h is the number of times the DC welding machine performs welding work during the first time period; A g The short-circuit duration is the duration of the g-th positive-negative short circuit that occurs when the DC welding machine is performing welding work in the first time period. Step S122: Based on the short-circuit duration list A, determine the target short-circuit duration T0 of the DC welding machine within the first time period, T0 = ∑ h g=1 A g / h; Step S123: Obtain several mapping lists stored in the adjustment mapping table to obtain a mapping list set B=(B1,B2,...,B i ,...,B n ); where i = 1, 2, ..., n; n is the number of mapping lists stored in the adjustment mapping table; B i The i-th mapping list stored in the adjustment mapping table; B i =(B i1 B i2 B i3 B i4 ); B i1 B is the type identifier corresponding to the electrode type in the i-th mapping list; i2 B represents the short-circuit duration range in the i-th mapping list; i2 =(B i21 B i22 ); B i21 For B i2 The corresponding minimum short-circuit duration; B i22 For B i2 The corresponding maximum short-circuit duration; B i3 B represents the current frequency in the i-th mapping list; i4 The thrust current value is in the i-th mapping list; Step S124: Traverse the mapping list set B, if B i1 The corresponding electrode type is the electrode type corresponding to the electrode mentioned above, and B i21 <T0<B i22 Then B i3 The target current frequency corresponding to the DC welding machine is determined, and B is... i4 The target thrust current value corresponding to the DC welding machine is determined.

5. The method according to claim 4, characterized in that, Step S200 includes: Step S210: Obtain several adjustable current frequencies corresponding to the electrode type of the welding electrode, to obtain an adjustable current frequency list C=(C1,C2,...,C...). j ,...,C k ); where j=1,2,...,k; k is the number of adjustable current frequencies corresponding to the electrode type; C j The j-th adjustment current frequency corresponding to the electrode type of the welding electrode; Step S220: Based on the adjusted current frequency list C, determine the difference between the target current frequency and each of the adjusted current frequencies to obtain a current frequency difference list D=(D1,D2,...,D...). j ,...,D k ); where D j The difference between the target current frequency and the j-th adjusted current frequency; D j =|C0-C j |;C0 is the target current frequency; Step S230: Determine the adjustment current frequency corresponding to MIN(D) as the key current frequency; where MIN() is a preset minimum value determination function.

6. The method according to claim 5, characterized in that, Step S300 includes: Step S310: Obtain several adjustable thrust current values ​​corresponding to the electrode type of the welding electrode, to obtain an adjustable thrust current value list E=(E1,E2,...,E r ,...,E t ); where r = 1, 2, ..., t; t is the number of adjusted thrust current values ​​corresponding to the electrode type; E r The r-th adjustment thrust current value corresponding to the electrode type of the welding electrode; Step S320: Based on the adjusted thrust current value list E, determine the difference between the target thrust current value and each of the adjusted thrust current values ​​to obtain a thrust current difference list F = (F1, F2, ..., F...). r ,...,F t ); where F r F is the difference between the target thrust current value and the r-th adjusted thrust current value; r =|E0-E r |; E0 is the target thrust current value; Step S330: Determine the adjustment thrust current value corresponding to MIN(F) as the key thrust current value.

7. The method according to claim 6, characterized in that, Step S600 includes: Step S610: If a short circuit occurs between the positive and negative poles when the DC welding machine is performing welding work in the second time period, obtain the short circuit duration T1 of the DC welding machine when the short circuit occurs. Step S620: If T1 is within a preset time range, adjust the output frequency of the welding current of the DC welding machine to the target current frequency, and adjust the thrust current value of the DC welding machine to the target thrust current value.

8. The method according to claim 7, characterized in that, Step S620 further includes: Step S621: If T1 is not within the preset time range, then obtain the standard current frequency and standard thrust current value corresponding to the electrode type of the electrode. Step S622: Adjust the output frequency of the welding current of the DC welding machine towards the standard current frequency, and adjust the thrust current value of the DC welding machine towards the standard thrust current value. During the adjustment of the output frequency and thrust current value of the welding current of the DC welding machine, the short-circuit duration of the positive and negative poles of the DC welding machine when a short circuit occurs is acquired in real time. When the short-circuit duration is within a preset duration range, the adjustment of the output frequency and thrust current value of the welding current of the DC welding machine is stopped.

9. A non-transitory computer-readable storage medium, characterized in that, The storage medium stores at least one instruction or at least one program segment, which is loaded and executed by a processor to implement the method as described in any one of claims 1-8.

10. An electronic device, characterized in that, Includes a processor and the non-transitory computer-readable storage medium as described in claim 9.

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