Dual wire welding method and apparatus

Abstract

The application provides a double-wire welding method and device, which comprises the following steps: determining the heat input of an electric arc to base material according to a welding condition; determining a welding mode according to the heat input and the welding condition; setting welding current output by a front-wire welding power supply and welding current output by a rear-wire welding power supply based on the welding mode; wherein the welding current output by at least one of the front-wire welding power supply and the rear-wire welding power supply is welding current in a pulse and direct current mixed form. By setting the welding current output by at least one of the front-wire welding power supply and the rear-wire welding power supply in a pulse and direct current mixed form based on the heat input and the welding condition, the heat input of the electric arc to the base material during double-wire welding can be controlled to meet the requirements, especially when welding a thin plate lap joint, the heat input of the electric arc to the base material can be reduced, and problems such as edge burn-in and deformation can be avoided, thereby improving the welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a double-wire welding method and apparatus. Background Technology

[0002] Twin-wire welding in gas metal arc welding (GMAW) consists of two MIG / MAG welding power sources (referred to as the front wire and rear wire, respectively), two wire feeders, and a welding torch. The two welding power sources have communication and coordination functions. Due to its higher deposition efficiency, higher welding speed, stable welding process, and good welding performance, twin-wire welding is increasingly widely used, especially in the large-fill welding of medium and thick plates and the rapid welding of thin plates.

[0003] However, when using the twin-wire welding technique to weld lap joints of thin plates, problems such as undercut and significant workpiece deformation can easily occur, affecting the welding quality. Summary of the Invention

[0004] The purpose of this invention is to provide a method and apparatus for improving the quality of twin-wire welding.

[0005] To achieve the above objectives, the present invention provides a twin-wire welding method, comprising:

[0006] Determine the amount of heat input to the base material from the electric arc required during welding, based on the welding conditions.

[0007] The welding mode is determined based on the heat input and the welding conditions.

[0008] Based on the welding mode, the welding current output by the front wire welding power supply and the welding current output by the rear wire welding power supply are set.

[0009] Among them, at least one of the front wire welding power source and the rear wire welding power source outputs a welding current in the form of a mixture of pulse and DC welding current.

[0010] The present invention also provides a twin-wire welding apparatus for improving welding quality, comprising:

[0011] The heat input determination module is used to determine the amount of heat input from the electric arc to the base material required during welding, based on the welding conditions.

[0012] The welding mode determination module is used to determine the welding mode based on the heat input and the welding conditions.

[0013] The welding current setting module is used to set the welding current output by the front wire welding power source and the welding current output by the rear wire welding power source based on the welding mode.

[0014] Among them, at least one of the front wire welding power source and the rear wire welding power source outputs a welding current in the form of a mixture of pulse and DC welding current.

[0015] This invention, through its embodiments, determines the required heat input of the arc to the base material during welding based on the welding conditions; determines the welding mode based on the heat input and welding conditions; and sets the welding current output by the front wire welding power source and the rear wire welding power source based on the welding mode. Specifically, at least one of the front and rear wire welding power sources outputs a welding current in a mixed pulse and DC form. By setting at least one of the front and rear wire welding power sources to output a welding current in a mixed pulse and DC form based on the heat input and welding conditions, the heat input of the arc to the base material during dual-wire welding can be controlled to meet requirements. This is particularly effective in welding thin plate lap joints, reducing the heat input of the arc to the base material and avoiding problems such as undercut and deformation, thereby improving welding quality. Attached Figure Description

[0016] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

[0017] Figure 1 This is a schematic diagram illustrating the implementation process of the dual-wire welding method according to an embodiment of the present invention;

[0018] Figure 2 This is an example waveform of welding current in a mixed form of pulse and DC in a specific embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the waveforms of the welding current output by the front wire and the rear wire in a specific embodiment of the present invention (I);

[0020] Figure 4 This is a schematic diagram (II) of the waveforms of the welding current output by the front wire and the rear wire in a specific embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram (III) of the waveforms of the welding current output by the front wire and the rear wire in a specific embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the waveforms of the welding current output by the front wire and the rear wire in a specific embodiment of the present invention (IV);

[0023] Figure 7 This is a schematic diagram of the structure of the dual-wire welding device according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0026] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0027] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0028] The inventors discovered that when using the twin-wire welding technology to weld lap joints of thin plates, the large heat input easily leads to problems such as undercut and significant workpiece deformation. To solve this problem, it is necessary to address how to minimize the heat input of the welding arc to the base material while ensuring welding efficiency and arc stability.

[0029] In traditional gas-shielded metal arc welding (GMAW), the front and rear wires can be welded using either pulse welding or direct current (DC) welding. The combination of the front and rear wires can be either pulse + DC, pulse + pulse, DC + pulse, or DC + DC, for a total of four methods. Through numerous experiments, the inventors discovered that using pulse welding for both the front and rear wires results in the most stable and controllable arc, leading to the best welding performance.

[0030] Based on the above findings, embodiments of the present invention provide a twin-wire welding method to improve welding quality. The method is as follows: Figure 1 As shown, it includes:

[0031] Step 101: Determine the amount of heat input to the base material from the electric arc required during welding, based on the welding conditions;

[0032] Step 102: Determine the welding mode based on the heat input and welding conditions;

[0033] Step 103: Based on the welding mode, set the welding current output by the front wire welding power supply and the welding current output by the rear wire welding power supply;

[0034] Among them, at least one of the front wire welding power source and the rear wire welding power source outputs a welding current in the form of a mixture of pulse and DC welding current.

[0035] As can be seen from the above process, the embodiments of the present invention determine the required heat input of the arc to the base material during welding based on the welding conditions; determine the welding mode based on the heat input and welding conditions; and set the welding current output by the front wire welding power source and the rear wire welding power source based on the welding mode. Specifically, at least one of the front wire and rear wire welding power sources outputs a welding current in a mixed pulse and DC form. By setting at least one of the front wire and rear wire welding power sources to output a welding current in a mixed pulse and DC form based on the heat input and welding conditions, the heat input of the arc to the base material during dual-wire welding can be controlled to meet the requirements. Especially when welding thin plate lap joints, this reduces the heat input of the arc to the base material, avoiding problems such as undercut and deformation, thereby improving welding quality.

[0036] In practice, the first step is to determine the required heat input of the electric arc to the base material based on the welding conditions. Specifically, the welding conditions include: welding materials, welding position, base material, welding gas, and welding wire. Based on these conditions, combined with welding experience and historical welding data, a rough estimate of the required heat input of the electric arc to the base material can be determined.

[0037] After determining the required heat input of the electric arc to the base material during welding, the welding mode is determined based on the heat input and welding conditions. Specifically, the welding mode is mainly determined based on the welding plate, the welding position, and the required heat input of the electric arc to the base material during welding. In one specific embodiment, if the welding plate is thin and the heat input is below a preset threshold, the welding mode is determined as the first welding mode; if the welding plate is thick and the welding position is a filler weld, the welding mode is determined as the second welding mode; if the welding position is on the upslope of the workpiece, the welding mode is determined as the third welding mode; and if the welding plate is thick and the welding position involves multiple layers and passes of beveling, the welding mode is determined as the fourth welding mode.

[0038] After determining the welding mode, based on the welding mode, set the welding current output by the front wire welding power source and the welding current output by the rear wire welding power source, and at least one of the front wire welding power sources and the rear wire welding power source outputs a welding current in the form of a pulse and DC mixed welding current.

[0039] Specifically, each cycle of the pulsed and DC hybrid welding current includes a first current waveform and a second current waveform, wherein the first current waveform is a pulsed welding current waveform, and the second current waveform is a short-circuit welding current waveform. For example... Figure 2The diagram shows an example waveform of a welding current in a mixed pulse and DC form. Waveform A is the pulse welding current waveform, and waveform B is the DC welding current, also known as the short-circuit welding current. Waveforms A and B exist within one cycle, and there are no restrictions on the amplitude, peak value, and base value of each waveform. The ratio of the duration of any waveform within one cycle to the cycle itself is called the duty cycle of that waveform. Specifically, there are no restrictions on the duty cycles of waveforms A and B.

[0040] In specific embodiments, based on the welding mode, the welding current output by the front wire welding power supply and the welding current output by the rear wire welding power supply are set in various ways.

[0041] In the first embodiment, if the welding mode is the first welding mode, the welding current output by the front wire welding power supply is set to a pulse current; the welding current output by the rear wire welding power supply is set to a welding current in the form of a mixture of pulse and DC. Specifically, as follows... Figure 3 The image shows a schematic diagram of the welding current output by the front and rear wires in a specific example. From... Figure 3 As can be seen, the front wire uses full pulse control, while the rear wire uses a multi-control method of pulse + DC, which reduces the overall heat input of the welding. During the switching between pulse welding and DC welding of the rear wire, the change in wire feed speed causes the welding wire to stir the molten pool, which is conducive to the precipitation of gas in the molten pool and reduces the probability of porosity to a certain extent, thus improving the welding quality. Moreover, the amount of heat input can be adjusted by changing the proportion of DC welding, that is, by adjusting the duty cycle of the second current waveform. This mode is more suitable for thin plates, especially for welding lap joints of thin plates.

[0042] In the second embodiment, if the welding mode is the second welding mode; the welding current output by the front wire welding power supply is set to a welding current in the form of a mixture of pulse and DC; the welding current output by the rear wire welding power supply is set to a pulse current. Specifically, as follows... Figure 4 The image shows a schematic diagram of the welding current output by the front and rear wires in a specific example. From... Figure 4 As can be seen, the front wire adopts a multi-control method of pulse + DC, while the rear wire adopts a fully pulsed control method. Because the rear wire uses a fully pulsed welding method, the weld formation is more aesthetically pleasing, making it more suitable for thick plate filling applications.

[0043] In the third embodiment, if the welding mode is the third welding mode; the welding current output by the front wire welding power supply is set to a mixed pulse and DC welding current; the welding current output by the rear wire welding power supply is set to a mixed pulse and DC welding current; the period of the welding current output by the rear wire welding power supply is set to be consistent with the period of the welding current output by the front wire welding power supply; and at any given time, the waveform type of the welding current output by the front wire welding power supply is the same as the waveform type of the welding current output by the rear wire welding power supply. Specifically, as shown... Figure 5 The image shows a schematic diagram of the welding current output by the front and rear wires in a specific example. From... Figure 5 As can be seen, when the front wire uses pulse welding, the rear wire also uses pulse welding; when the front wire uses DC welding, the rear wire also uses DC welding. This means the frequency of pulse / DC switching for the rear wire is controlled by the front wire. Specifically, the duty cycle of the first and second current waveforms of the welding current output by the rear wire welding power supply needs to be set to match the welding current output by the front wire welding power supply. Compared to the welding current used in the first and second welding modes, the heat input is further reduced. Furthermore, because the front and rear wires use the same welding method, the arc's influence on the molten pool is more consistent. This is suitable for welds with a certain upward slope, preventing the molten pool from sagging during welding and avoiding affecting weld quality.

[0044] In the fourth embodiment, if the welding mode is the fourth welding mode, the welding current output by the front wire welding power supply is set to a mixed pulse and DC welding current; the welding current output by the rear wire welding power supply is set to a mixed pulse and DC welding current; the period of the welding current output by the rear wire welding power supply is set to be consistent with the period of the welding current output by the front wire welding power supply; and at any given time, the waveform types of the welding current output by the front wire welding power supply and the welding current output by the rear wire welding power supply are different, that is, at any given time, the waveform type of the welding current output by the front wire welding power supply is the first current waveform, then the waveform type of the welding current output by the rear wire welding power supply is the second current waveform. Specifically, as follows... Figure 6 The image shows a schematic diagram of the welding current output by the front and rear wires in a specific example. From... Figure 6 It can be seen from this that, with Figure 5 The difference lies in the welding modes of the front and rear wires at the same time. Specifically, when the front wire is pulse welding, the rear wire is DC welding; conversely, when the front wire is DC welding, the rear wire is pulse welding. Similarly, the frequency of pulse / DC switching for the rear wire is controlled by the front wire, but... Figure 5The difference lies in the duty cycle: the first current waveform of the welding current output by the rear wire welding power source needs to be set to match the duty cycle of the second current waveform of the welding current output by the front wire welding power source, and vice versa. Figure 6 The welding current shown has the greatest stirring effect on the molten pool during the entire welding process, which is conducive to the release of gas in the molten pool and effectively reduces the probability of porosity. It is suitable for multi-layer and multi-pass welding of thick plates with bevels.

[0045] In practical applications, before starting welding, it is necessary to first select the welding matching mode, which is one of the four modes mentioned above. Then, the second current waveform in the welding current of the pulse and DC hybrid form needs to be set, that is, parameters such as amplitude and duty cycle need to be set, and then welding work can be carried out.

[0046] Through actual welding operations, the twin-wire welding method provided in this invention has been verified to reduce the heat input of the electric arc to the base material in all four welding modes. In different welding applications, such as differences in workpiece thickness and weld type, the appropriate welding mode can be selected to obtain ideal welding results.

[0047] Based on the same inventive concept, this invention also provides a twin-wire welding device. The principle of solving the problem is similar to that of the twin-wire welding method described above, and the repetitions will not be repeated. The specific structure is as follows: Figure 7 As shown, it includes:

[0048] The heat input determination module 701 is used to determine the amount of heat input from the electric arc to the base material required during welding based on the welding conditions.

[0049] The welding mode determination module 702 is used to determine the welding mode based on the heat input and welding conditions.

[0050] The welding current setting module 703 is used to set the welding current output by the front wire welding power source and the welding current output by the rear wire welding power source based on the welding mode.

[0051] Among them, at least one of the front wire welding power source and the rear wire welding power source outputs a welding current in the form of a mixture of pulse and DC welding current.

[0052] Specifically, each cycle of the welding current, which is a mixture of pulse and DC, includes a first current waveform and a second current waveform; the first current waveform is a pulse welding current waveform; and the second current waveform is a short-circuit welding current waveform.

[0053] In a specific embodiment, the welding current setting module 703 is specifically used for:

[0054] If the welding mode is the first welding mode;

[0055] Set the welding current output of the front wire welding power supply to a pulse current;

[0056] The welding current output by the back wire welding power supply is set to be a welding current in the form of a mixture of pulse and DC.

[0057] In a specific embodiment, the welding current setting module 703 is specifically used for:

[0058] If the welding mode is the second welding mode;

[0059] The welding current output by the front wire welding power supply is set to a welding current in the form of a mixture of pulse and DC.

[0060] The welding current output by the back wire welding power supply is set to a pulse current.

[0061] In a specific embodiment, the welding current setting module 703 is specifically used for:

[0062] If the welding mode is the third welding mode;

[0063] The welding current output by the front wire welding power supply is set to a welding current in the form of a mixture of pulse and DC.

[0064] The welding current output by the back wire welding power supply is set to a welding current in the form of a mixture of pulse and DC.

[0065] Set the cycle of the welding current output by the back wire welding power source to be consistent with the cycle of the welding current output by the front wire welding power source.

[0066] Furthermore, at any given time, the waveform type of the welding current output by the front wire welding power source is the same as the waveform type of the welding current output by the rear wire welding power source.

[0067] In a specific embodiment, the welding current setting module 703 is specifically used for:

[0068] If the welding mode is the fourth welding mode;

[0069] The welding current output by the front wire welding power supply is set to a welding current in the form of a mixture of pulse and DC.

[0070] The welding current output by the back wire welding power supply is set to a welding current in the form of a mixture of pulse and DC.

[0071] Set the cycle of the welding current output by the back wire welding power source to be consistent with the cycle of the welding current output by the front wire welding power source.

[0072] Furthermore, at any given time, the waveform type of the welding current output by the front wire welding power source is different from that of the welding current output by the rear wire welding power source.

[0073] This invention also provides a computer device. Figure 8 This is a schematic diagram of a computer device in an embodiment of the present invention. This computer device is capable of implementing all steps in the twin-wire welding method described above. Specifically, the computer device includes the following components:

[0074] Processor 801, memory 802, communications interface 803, and communication bus 804;

[0075] The processor 801, memory 802, and communication interface 803 communicate with each other through the communication bus 804; the communication interface 803 is used to realize information transmission between related devices.

[0076] The processor 801 is used to call the computer program in the memory 802, and when the processor executes the computer program, it implements the dual-wire welding method in the above embodiments.

[0077] This invention also provides a computer-readable storage medium storing a computer program that performs the above-described twin-wire welding method in response to the computer program being executed by a processor.

[0078] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described dual-wire welding method.

[0079] While this invention provides the method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-inventive labor. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only possible execution order. In actual device or client product execution, the methods shown in the embodiments or drawings can be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment).

[0080] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, apparatus (systems), or computer program products. Therefore, the embodiments of this specification can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, the 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.

[0081] 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... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0082] 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.

[0083] 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.

[0084] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments. In this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0085] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or substitution of these aspects and / or embodiments. Furthermore, each aspect and / or embodiment of the present invention can be used alone or in combination with one or more other aspects and / or embodiments thereof.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A twin-wire welding method, characterized in that, include: Determine the amount of heat input to the base material from the electric arc required during welding, based on the welding conditions. The welding mode is determined based on the welding plate, the welding position, and the heat input. Specifically, this includes: if the welding plate is a thin plate and the heat input is lower than a preset threshold, the welding mode is determined to be the first welding mode; based on the welding mode, the welding current output by the front wire welding power supply and the welding current output by the rear wire welding power supply are set. Wherein, at least one of the front wire welding power source and the rear wire welding power source outputs a welding current in the form of a mixture of pulse and DC welding current; If the welding mode is the first welding mode, the welding current output by the front wire welding power supply is set to a pulse current; the welding current output by the rear wire welding power supply is set to a welding current in the form of a pulse and DC mixture.

2. The twin-wire welding method according to claim 1, characterized in that, Each cycle of the pulsed and DC hybrid welding current includes a first current waveform and a second current waveform; the first current waveform is a pulsed welding current waveform; and the second current waveform is a short-circuit welding current waveform.

3. The twin-wire welding method according to claim 1, characterized in that, The welding mode is determined based on the welding plate, the welding position, and the heat input, including: If the plate being welded is a thick plate and the welding position is a filler weld, the welding mode is determined to be the second welding mode. Specifically, based on the welding mode, setting the welding current output by the front wire welding power source and the welding current output by the rear wire welding power source includes: If the welding mode is the second welding mode; The welding current output by the front wire welding power supply is set to a welding current in the form of a mixture of pulse and DC. The welding current output by the back wire welding power supply is set to a pulse current.

4. The twin-wire welding method according to claim 1, characterized in that, The welding mode is determined based on the welding plate, the welding position, and the heat input, including: If the welding position is located on the uphill side of the workpiece, the welding mode is determined to be the third welding mode; Specifically, based on the welding mode, setting the welding current output by the front wire welding power source and the welding current output by the rear wire welding power source includes: If the welding mode is the third welding mode; The welding current output by the front wire welding power supply is set to a welding current in the form of a mixture of pulse and DC. The welding current output by the back wire welding power supply is set to a welding current in the form of a mixture of pulse and DC. Set the cycle of the welding current output by the back wire welding power source to be consistent with the cycle of the welding current output by the front wire welding power source. Furthermore, at any given time, the waveform type of the welding current output by the front wire welding power source is the same as the waveform type of the welding current output by the rear wire welding power source.

5. The twin-wire welding method according to claim 1, characterized in that, The welding mode is determined based on the welding plate, the welding position, and the heat input, including: If the plate being welded is a thick plate, and the welding position involves multiple layers and passes of the plate with beveled edges, then the welding mode is determined to be the fourth welding mode. Specifically, based on the welding mode, setting the welding current output by the front wire welding power source and the welding current output by the rear wire welding power source includes: If the welding mode is the fourth welding mode; The welding current output by the front wire welding power supply is set to a welding current in the form of a mixture of pulse and DC. The welding current output by the back wire welding power supply is set to a welding current in the form of a mixture of pulse and DC. Set the cycle of the welding current output by the back wire welding power source to be consistent with the cycle of the welding current output by the front wire welding power source. Furthermore, at any given time, the waveform type of the welding current output by the front wire welding power source is different from that of the welding current output by the rear wire welding power source.

6. A twin-wire welding device, characterized in that, include: The heat input determination module is used to determine the amount of heat input from the electric arc to the base material required during welding, based on the welding conditions. The welding mode determination module is used to determine the welding mode based on the welding plate, the welding position and the heat input; specifically, it is used to determine the welding mode as the first welding mode if the welding plate is a thin plate and the heat input is lower than a preset threshold. The welding current setting module is used to set the welding current output by the front wire welding power source and the welding current output by the rear wire welding power source based on the welding mode. Wherein, at least one of the front wire welding power source and the rear wire welding power source outputs a welding current in the form of a mixture of pulse and DC welding current; The welding current setting module is specifically used for: if the welding mode is the first welding mode; setting the welding current output by the front wire welding power supply to a pulse current; and setting the welding current output by the rear wire welding power supply to a welding current in the form of a pulse and DC mixture.

7. The twin-wire welding apparatus according to claim 6, characterized in that, The welding mode determination module is also used to: if the welding plate is a thick plate and the welding position is a filler weld, determine the welding mode as the second welding mode; The welding current setting module is further configured to: if the welding mode is the second welding mode; set the welding current output by the front wire welding power supply to be a welding current in the form of a pulse and DC mixture; and set the welding current output by the rear wire welding power supply to be a pulse current.

8. The twin-wire welding apparatus according to claim 6, characterized in that, The welding mode determination module is also used to: if the welding position is on the uphill side of the workpiece, determine the welding mode as the third welding mode. The welding current setting module is further configured to: if the welding mode is the third welding mode; set the welding current output by the front wire welding power supply to be a welding current in the form of a pulse and DC mixture; set the welding current output by the rear wire welding power supply to be a welding current in the form of a pulse and DC mixture; set the period of the welding current output by the rear wire welding power supply to be consistent with the period of the welding current output by the front wire welding power supply; and, at any given time, the waveform type of the welding current output by the front wire welding power supply and the waveform type of the welding current output by the rear wire welding power supply are the same.

9. The twin-wire welding apparatus according to claim 6, characterized in that, The welding mode determination module is also used for: If the plate being welded is a thick plate, and the welding position involves multiple layers and passes of the plate with beveled edges, then the welding mode is determined to be the fourth welding mode. The welding current setting module is further configured to: if the welding mode is the fourth welding mode; set the welding current output by the front wire welding power supply to be a welding current in the form of a pulse and DC mixture; set the welding current output by the rear wire welding power supply to be a welding current in the form of a pulse and DC mixture; set the period of the welding current output by the rear wire welding power supply to be consistent with the period of the welding current output by the front wire welding power supply; and, at any given time, the waveform type of the welding current output by the front wire welding power supply and the waveform type of the welding current output by the rear wire welding power supply are different.

10. A computer device, characterized in that, The computer device includes: a processor adapted to implement various instructions and a storage device, the storage device storing multiple instructions adapted to be loaded by the processor and executed as described in any one of claims 1 to 5.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program for performing the twin-wire welding method according to any one of claims 1 to 5.

12. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the twin-wire welding method according to any one of claims 1 to 5.

Images