Welding method and apparatus

Abstract

The application provides a welding method and device. The method comprises the following steps: after a first alternating current pulse welding cycle starts, constant wire feeding is performed at a first wire feeding speed, and alternating current pulse welding is performed at a set pulse welding parameter; when the first alternating current pulse welding cycle ends, accelerated wire feeding is performed, and an actual welding voltage is detected; when the actual welding voltage is zero, a first short circuit welding cycle is started, wire drawing and wire feeding are alternately performed, and short circuit welding is performed at a set short circuit welding parameter; when the first short circuit welding cycle ends, the wire feeding speed is adjusted; when the wire feeding speed is the first wire feeding speed, the next alternating current pulse welding cycle is started, constant wire feeding is performed at the first wire feeding speed, and alternating current pulse welding is performed at the set pulse welding parameter. The method can be used for welding with a lower heat input while obtaining a larger size welding angle, can increase the adaptability of the arc to external interference, can ensure the quality of the weld, and has a better welding effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a welding method and device. BACKGROUND

[0002] At present, when welding metal pieces, various welding methods can be adopted. For example, when welding aluminum alloy, a welding method combining short circuit welding and direct current pulse welding can be adopted. According to such a welding method, short circuit can cool the molten pool, and pulse can remove the oxide film to open the weld, and the arc has strong adaptability, but it is easy to cause large spatter. For example, when welding thick plates, a welding method combining direct current pulse and alternating current pulse can be adopted. According to such a welding method, the heat input is low, and a larger weld angle can be obtained, but for the weld with a reinforcing rib plate, the degree of influence is large, the arc has poor anti-interference ability, and the workpiece has large deformation.

[0003] Therefore, in the welding of metal pieces, how to reduce the heat input while obtaining a larger size weld angle, and increase the anti-interference ability of the arc, has become a technical problem to be solved by those skilled in the art. SUMMARY

[0004] In order to solve the problem of how to reduce the heat input while obtaining a larger size weld angle, and increase the anti-interference ability of the arc in the welding of metal pieces, the present application provides a welding method and device.

[0005] In a first aspect, the embodiments of the present application provide a welding method, which comprises: after a first alternating current pulse welding period starts, constant wire feeding is performed at a first wire feeding speed, and alternating current pulse welding is performed at a set pulse welding parameter; when the first alternating current pulse welding period ends, accelerated wire feeding is performed, and an actual welding voltage is detected; when the actual welding voltage is detected to be zero, a first short circuit welding period is started, wire drawing and wire feeding are alternately performed, and short circuit welding is performed at a set short circuit welding parameter; when the first short circuit welding period ends, the wire feeding speed is adjusted; when the wire feeding speed is adjusted to the first wire feeding speed, the next alternating current pulse welding period of the first alternating current pulse welding period is started, constant wire feeding is performed at the first wire feeding speed, and alternating current pulse welding is performed at the pulse welding parameter.

[0006] In a possible implementation manner, the method further comprises: after the first alternating current pulse welding period starts, the number of alternating current pulses in the alternating current pulse welding is counted; when the number of alternating current pulses reaches a first preset number, it is determined that the first alternating current pulse welding period ends.

[0007] In a possible implementation manner, the method further includes: timing a first welding duration of the AC pulse welding after the first AC pulse welding cycle is started; and determining that the first AC pulse welding cycle is ended when the first welding duration reaches a first preset duration.

[0008] In a possible implementation manner, the AC pulse welding is performed with the set pulse welding parameters after the first AC pulse welding cycle is started, including: after the first AC pulse welding cycle is started, each pulse cycle in the AC pulse welding is sequentially determined as a target pulse cycle, and welding current in a next pulse cycle of the target pulse cycle is adjusted as follows: a first voltage mean value is determined; the first voltage mean value is a mean value of an actual welding voltage in the target pulse cycle; if the first voltage mean value is different from a second voltage mean value, a duration of a forward base welding current in the next pulse cycle of the target pulse cycle is adjusted, so that a mean value of an actual welding voltage in the next pulse cycle of the target pulse cycle is equal to the second voltage mean value; the second voltage mean value is a mean value of a welding voltage in a set single pulse cycle.

[0009] In a possible implementation manner, the method further includes: counting a number of wire drawing cycles in the short circuit welding after the first short circuit welding cycle is started; the wire drawing cycle includes a wire drawing stage and a wire feeding stage connected thereto; and determining that the first short circuit welding cycle is ended when the number of the wire drawing cycles reaches a second preset number.

[0010] In a possible implementation manner, the method further includes: timing a second welding duration of the short circuit welding after the first short circuit welding cycle is started; and determining that the first short circuit welding cycle is ended when the second welding duration reaches a second preset duration.

[0011] In a possible implementation manner, the first short circuit welding cycle is started when it is detected that the actual welding voltage is zero, and the wire drawing and the wire feeding are alternately performed, including: when it is detected that the actual welding voltage is zero, the first short circuit welding cycle is started, and in any one wire drawing and feeding cycle, the wire drawing is performed at a set wire drawing speed when it is detected that the actual welding voltage is zero; and the wire feeding is performed at a set second wire feeding speed when it is detected that the actual welding voltage increases from zero to a preset value.

[0012] In a possible implementation, the short circuit welding with the set short circuit welding parameters comprises: determining each draw wire period in the short circuit welding as a target draw wire period in sequence, and adjusting welding current of a next draw wire period of the target draw wire period as follows: determining a third voltage mean value; the third voltage mean value is a mean value of actual welding voltage in the target draw wire period; if the third voltage mean value is different from a fourth voltage mean value, adjusting a duration of an arc peak current in the next draw wire period of the target draw wire period, so that the mean value of the actual welding voltage in the next draw wire period of the target draw wire period is equal to the fourth voltage mean value; the fourth voltage mean value is a mean value of welding voltage in a set single draw wire period.

[0013] In a second aspect, the embodiments of the present application further provide a welding device, which comprises: a first control module, configured to perform constant wire feeding at a first wire feeding speed after a first alternating current pulse welding period starts, and perform alternating current pulse welding at set pulse welding parameters; a second control module, configured to perform accelerated wire feeding when the first alternating current pulse welding period ends, and detect actual welding voltage; a third control module, configured to start a first short circuit welding period when the actual welding voltage is detected to be zero, alternately perform wire drawing and wire feeding, and perform short circuit welding at set short circuit welding parameters; a fourth control module, configured to adjust the wire feeding speed when the first short circuit welding period ends; and a fifth control module, configured to start a next alternating current pulse welding period of the first alternating current pulse welding period when the wire feeding speed is adjusted to the first wire feeding speed, perform constant wire feeding at the first wire feeding speed, and perform alternating current pulse welding at the pulse welding parameters.

[0014] In a possible implementation, the device further comprises: a first counting module, configured to count a number of alternating current pulses in the alternating current pulse welding after the first alternating current pulse welding period starts; and a first determining module, configured to determine that the first alternating current pulse welding period ends when the number of alternating current pulses reaches a first preset number.

[0015] In a possible implementation, the device further comprises: a first timing module, configured to time a first welding duration of the alternating current pulse welding after the first alternating current pulse welding period starts; and a second determining module, configured to determine that the first alternating current pulse welding period ends when the first welding duration reaches a first preset duration.

[0016] In a possible implementation, the first control module is configured to perform the alternating current pulse welding with the set pulse welding parameters after the start of the first alternating current pulse welding period, specifically: the first control module is configured to: after the start of the first alternating current pulse welding period, sequentially determine each pulse period in the alternating current pulse welding as a target pulse period, and adjust the welding current in the next pulse period of the target pulse period as follows: determine a first voltage average; the first voltage average is an average of actual welding voltages in the target pulse period; if the first voltage average is different from a second voltage average, adjust a duration of the forward base welding current in the next pulse period of the target pulse period, so that the average of the actual welding voltages in the next pulse period of the target pulse period is equal to the second voltage average; the second voltage average is an average of welding voltages in a set single pulse period.

[0017] In a possible implementation, the device further includes: a second counting module configured to count a number of wire drawing periods in the short circuit welding after the start of the first short circuit welding period; the wire drawing period includes a wire drawing stage and a wire feeding stage connected thereto; and a third determining module configured to determine that the first short circuit welding period ends when the number of the wire drawing periods reaches a second preset number.

[0018] In a possible implementation, the device further includes: a second timing module configured to time a second welding duration of the short circuit welding after the start of the first short circuit welding period; and a fourth determining module configured to determine that the first short circuit welding period ends when the second welding duration reaches a second preset duration.

[0019] In a possible implementation, the third control module is configured to start the first short circuit welding period when it is detected that the actual welding voltage is zero, and alternately perform wire drawing and wire feeding, specifically: the third control module is configured to: when it is detected that the actual welding voltage is zero, start the first short circuit welding period, and in any one wire drawing and feeding period, perform wire drawing at a set wire drawing speed when it is detected that the actual welding voltage is zero; and perform wire feeding at a set second wire feeding speed when it is detected that the actual welding voltage increases from zero to a preset value.

[0020] In a possible implementation, the third control module is configured to perform short circuit welding in the set short circuit welding parameters, and specifically, the third control module is configured to: determine each draw wire period in the short circuit welding as a target draw wire period in sequence, and adjust the welding current of the next draw wire period of the target draw wire period as follows: determine a third voltage average; the third voltage average is an average of actual welding voltages in the target draw wire period; if the third voltage average is different from a fourth voltage average, adjust the duration of the arc peak current in the next draw wire period of the target draw wire period, so that the average of the actual welding voltages in the next draw wire period of the target draw wire period is equal to the fourth voltage average; the fourth voltage average is an average of welding voltages in a set single draw wire period.

[0021] In a third aspect, an embodiment of the present application further provides a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor implements the method of the first aspect when executing the computer program.

[0022] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, which stores a computer program for executing the method of the first aspect.

[0023] Embodiments of the present application provide a welding method and device. Through the method, welding can be performed in an alternating manner of alternating between AC pulse welding and draw wire short circuit welding. The AC pulse welding process can open the molten pool, increase the deposition amount, and reduce the heat input amount to the base material. The draw wire short circuit welding process can cool the molten pool and further reduce the heat input amount of the overall welding. Thus, a larger size weld corner can be obtained while using a lower heat input amount for welding, and the adaptability of the arc to external interference can be increased to ensure the quality of the weld and achieve better welding effect. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A flowchart of a welding method provided by an embodiment of the present application.

[0026] Figure 2 An application scenario diagram provided by an embodiment of the present application.

[0027] Figure 3A flowchart of a method for adjusting welding current in a next pulse period of a target pulse period is provided for an embodiment of the present application.

[0028] Figure 4 A flowchart of a method for adjusting welding current in a next wire drawing period of a target wire drawing period is provided for an embodiment of the present application.

[0029] Figure 5 A structural block diagram of a welding device is provided for an embodiment of the present application.

[0030] Figure 6 A structural block diagram of a computer device is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0031] The present application will be further described below in detail with the aid of drawings and embodiments. The features and advantages of the present application will become more apparent from these descriptions.

[0032] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Unless specifically stated otherwise, the drawings are not drawn to scale and are merely intended to conceptually illustrate aspects of the embodiments.

[0033] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0034] In order to facilitate understanding, first, the application scenario of the technical solution of the present application is introduced.

[0035] The inventor found in the specific application and research that at present, the welding method of metal parts cannot reduce the heat input while obtaining a larger size welding angle, and increase the anti-interference ability of the arc. In order to be able to reduce the heat input while obtaining a larger size welding angle, and increase the anti-interference ability of the arc, the present application proposes a welding method combining alternating current pulse welding and wire drawing short circuit welding. That is, the welding method of alternating current pulse welding and wire drawing short circuit welding is alternately welded according to a certain period.

[0036] In one possible implementation, after the welding starts, alternating current pulse welding can be performed first, and then wire drawing short circuit welding is performed. That is, after the welding starts, the welding can be performed in the alternating manner of alternating current pulse welding period-wire drawing short circuit welding period-alternating current pulse welding period-wire drawing short circuit welding period until the welding is completed.

[0037] In a possible implementation manner, after the welding starts, the short-circuit welding with wire drawing can be performed first, and then the alternating current pulse welding is performed. That is, after the welding starts, the welding can be performed in the alternating manner of the short-circuit welding with wire drawing period-alternating current pulse welding period-short-circuit welding with wire drawing period-alternating current pulse welding period until the welding ends.

[0038] In the above any one of the implementation manners, the implementation manner of switching from any one of the alternating current pulse welding periods to the short-circuit welding with wire drawing period is the same, and the implementation manner of switching from any one of the short-circuit welding with wire drawing periods to the alternating current pulse welding period is also the same. In addition, the implementation manner of switching from any one of the alternating current pulse welding periods to the short-circuit welding with wire drawing period is also the same in the above two implementation manners. The implementation manner of switching from any one of the short-circuit welding with wire drawing periods to the alternating current pulse welding period is also the same in the above two implementation manners. Based on this, in the present application, an example of the welding method is described as follows: switching from one of the alternating current pulse welding periods (hereinafter referred to as the first alternating current pulse welding period) to the short-circuit welding with wire drawing period (hereinafter referred to as the first short-circuit welding with wire drawing period), and then switching from the first short-circuit welding with wire drawing period to the next alternating current pulse welding period of the first alternating current pulse welding period.

[0039] The welding method provided by the embodiment of the present application is described below with reference to the accompanying drawings.

[0040] Referring to Figure 1 , Figure 1 FIG. 1 is a flowchart of a welding method provided by an embodiment of the present application. The method can be applied to a terminal device or a controller provided in a welding system. The embodiment of the present application is described below by taking the controller provided in the welding system (hereinafter referred to as the controller) as an example.

[0041] As shown in FIG. 1, the method can include the following steps. Figure 1

[0042] In step S101, after the first alternating current pulse welding period starts, the wire is sent at a first constant wire feeding speed, and the alternating current pulse welding is performed at the set pulse welding parameters.

[0043] Optionally, the first wire feeding speed can be set according to the requirements of the actual application scene, and the set first wire feeding speed can be pre-stored in a storage device in communication connection with the controller. When performing step S101, the controller can directly read the first wire feeding speed from the storage device in communication connection with the controller. After the first alternating current pulse welding period starts, the controller can control the wire feeding motor of the welding system to rotate at a constant speed in a forward direction, so as to perform constant wire feeding (which can also be referred to as wire output) at the first wire feeding speed in the first alternating current pulse welding period. ​

[0044] Optionally, as shown in Figure 2 The first alternating current pulse welding cycle can include a plurality of pulse cycles. One pulse cycle can include a forward pulse phase and a backward pulse phase connected thereto. It should be noted that the first alternating current pulse welding cycle can include an integer number of pulse cycles. Alternatively, the first alternating current pulse welding cycle can include a non-integer number of pulse cycles. That is, the last pulse phase of the first alternating current pulse welding cycle can include a complete forward pulse phase and a complete backward pulse phase connected thereto. Alternatively, the last pulse phase of the first alternating current pulse welding cycle can include only a complete forward pulse phase. Alternatively, the last pulse phase of the first alternating current pulse welding cycle can include only a partial forward pulse phase. Alternatively, the last pulse phase of the first alternating current pulse welding cycle can include a complete forward pulse phase and a partial backward pulse phase.

[0045] Optionally, the set pulse welding parameters can include a mean value of the welding voltage in a single pulse cycle and a duration of the forward base welding current in a single pulse cycle (as shown in Figure 2 In actual welding, in order to ensure the stability of the welding, the mean value of the welding voltage in each pulse cycle can be kept constant. Based on this, in one possible implementation, the controller performs the alternating current pulse welding with the set pulse welding parameters after the start of the first alternating current pulse welding cycle, which can be implemented in the following manner:

[0046] First, after the start of the first alternating current pulse welding cycle, each pulse cycle in the alternating current pulse welding is sequentially determined as a target pulse cycle. Then, for each target pulse cycle, the welding current in the next pulse cycle of the target pulse cycle is adjusted in the manner shown in Figure 3

[0047] Step S201, determining a first voltage mean value.

[0048] The first voltage mean value is a mean value of the actual welding voltage in the target pulse cycle. After the start of the first alternating current pulse welding cycle, the controller can obtain the actual welding voltage in the alternating current pulse welding in real time, and then calculate the mean value of the actual welding voltage in the target pulse cycle, i.e., the first voltage mean value, according to the obtained actual welding voltage.

[0049] Step S202, if the first voltage mean value is different from a second voltage mean value, adjusting the duration of the forward base welding current in the next pulse cycle of the target pulse cycle, so that the mean value of the actual welding voltage in the next pulse cycle of the target pulse cycle is equal to the second voltage mean value.

[0050] ​The second voltage average is an average value of the welding voltage in the set single pulse period.

[0051] After the controller determines the first voltage average, if the first voltage average is different from the second voltage average, it indicates that the average value of the actual welding voltage in the target pulse period deviates from the average value of the welding voltage in the set single pulse period, and then the controller can adjust the duration of the forward base value welding current in the next pulse period of the target pulse period, so that the average value of the actual welding voltage in the next pulse period of the target pulse period returns to the average value of the welding voltage in the set single pulse period. That is, in the next pulse period of the target pulse period, the controller no longer performs the welding of the forward base value stage with the duration of the forward base value welding current in the set single pulse period, but adjusts the duration of the welding current (i.e., the forward base value welding current) of the forward base value stage in the next pulse period of the target pulse period according to the deviation between the average value of the actual welding voltage in the target pulse period and the average value of the welding voltage in the set single pulse period, so that the average value of the actual welding voltage in the next pulse period of the target pulse period returns to the average value of the welding voltage in the set single pulse period, thereby ensuring the stability of the welding.

[0052] Optionally, when the first voltage average is greater than the second voltage average, the duration of the forward base value welding current in the next pulse period of the target pulse period is increased based on the duration of the forward base value welding current in the set single pulse period, so that the average value of the actual welding voltage in the next pulse period of the target pulse period is equal to the average value of the welding voltage in the set single pulse period, thereby ensuring the stability of the welding. Conversely, when the first voltage average is less than the second voltage average, the duration of the forward base value welding current in the next pulse period of the target pulse period is reduced based on the duration of the forward base value welding current in the set single pulse period, so that the average value of the actual welding voltage in the next pulse period of the target pulse period is equal to the average value of the welding voltage in the set single pulse period, thereby ensuring the stability of the welding. It should be understood that when the first voltage average is equal to the second voltage average, the duration of the forward base value welding current in the next pulse period of the target pulse period is the duration of the forward base value welding current in the set single pulse period, and the welding of the forward base value stage is performed.

[0053] In this way, after the first alternating current pulse welding cycle starts, the duration of the forward base value welding current in the next pulse cycle can be adjusted in time according to the deviation between the actual welding voltage in each pulse cycle and the set average welding voltage in a single pulse cycle, so as to adjust the average welding voltage in the next pulse cycle to the set average welding voltage in a single pulse cycle, ensure the average welding voltage in each pulse cycle, and further ensure the stability of the welding, thereby better applicability.

[0054] It should be noted that the set pulse welding parameters can also include other parameters. For example, the set pulse welding parameters can also include at least one of the following parameters: the duration of a single pulse cycle, the magnitude and duration of the forward peak value welding current in a single pulse cycle, the magnitude of the forward base value welding current in a single pulse cycle, the EN ratio of a single pulse cycle (i.e., the ratio of the duration of the negative current to the duration of the forward current in a single pulse cycle), and the like. It should be understood that the set pulse welding parameters can also include other parameters, which are not listed one by one here.

[0055] Optionally, the controller performs alternating current pulse welding according to the set pulse welding parameters after the first alternating current pulse welding cycle starts, which can also include that the controller, after the first alternating current pulse welding cycle starts, regulates the welding current in the alternating current pulse welding process based on the set pulse welding parameters in each pulse cycle.

[0056] For example, when the forward base value welding current does not need to be adjusted in the manner shown in Figure 3 , the alternating current pulse welding can be performed according to the set pulse welding parameters. When the forward base value welding current needs to be adjusted in the manner shown in Figure 3 , the forward base value stage welding current can be adjusted in the manner shown in Figure 3 , and the remaining stages can be welded according to the set pulse welding parameters.

[0057] In step S102, the first alternating current pulse welding cycle ends, the wire feeding is accelerated, and the actual welding voltage is detected.

[0058] In one possible implementation, the number of alternating current pulses in a single alternating current pulse welding cycle or the number of pulse cycles can be set in advance. For example, the number of alternating current pulses in a single alternating current pulse welding cycle can be set to a first preset number. The specific value of the first preset number can be set according to the requirements of the actual application scenario. Then, the number of alternating current pulses or the number of pulse cycles can be used to determine whether the first alternating current pulse welding cycle ends.

[0059] In this application scenario, after the start of the first alternating current pulse welding cycle, the controller can also count the number of alternating current pulses in the alternating current pulse welding. When the number of alternating current pulses reaches the first preset number, the controller can determine that the first alternating current pulse welding cycle ends.

[0060] In a possible implementation, the duration of a single alternating current pulse welding cycle can also be preset. For example, the duration of a single alternating current pulse welding cycle can be set as a first preset duration. The specific value of the first preset duration can be set according to the requirements of the actual application scenario. Then, whether the first alternating current pulse welding cycle ends can be determined by the welding duration of the alternating current pulse welding.

[0061] In this application scenario, after the start of the first alternating current pulse welding cycle, the controller can also count the welding duration (hereinafter referred to as the first welding duration) of the alternating current pulse welding. When the first welding duration reaches the first preset duration, the controller can determine that the first alternating current pulse welding cycle ends.

[0062] When the controller determines that the first alternating current pulse welding cycle ends, the wire feeding speed can be increased for accelerated wire feeding, so that the welding wire can be in contact with the base material or the molten pool and enter the short circuit state faster. In this process, the controller can determine whether the welding wire is in contact with the base material or the molten pool and enters the short circuit state by detecting the actual welding voltage in real time.

[0063] In step S103, when it is detected that the actual welding voltage is zero, the first short circuit welding cycle is started, the wire is alternately drawn and fed, and short circuit welding is performed with the set short circuit welding parameters.

[0064] When the controller detects that the actual welding voltage is zero, it is determined that the welding wire is in contact with the base material or the molten pool and short circuit occurs. Then, the controller can switch the alternating current pulse welding to the wire drawing short circuit welding and start the first short circuit welding cycle. After the start of the first short circuit welding cycle, the controller controls the wire feeding motor to alternately draw and feed the wire, and performs short circuit welding with the set short circuit welding parameters. That is, as shown in FIG. 4, after the start of the first short circuit welding cycle, the controller can control the wire feeding motor to periodically draw and feed the wire according to the wire drawing and feeding cycle. One wire drawing and feeding cycle can include one wire drawing stage and one wire feeding stage connected thereto, or in other words, one wire drawing and feeding cycle can include one wire drawing process and one wire feeding process connected thereto. Figure 2

[0065] ​It should be noted that the first short-circuit welding cycle may include an integer number of wire drawing cycles. Alternatively, the first short-circuit welding cycle may also include a non-integer number of wire drawing cycles. That is, the last wire drawing process included in the first short-circuit welding cycle may include a complete wire drawing process and a subsequent complete wire feeding process. Alternatively, the last wire drawing process included in the first short-circuit welding cycle may include only a complete wire drawing process. Alternatively, the last wire drawing process included in the first short-circuit welding cycle may also include a complete wire drawing process and a partial wire feeding process. Alternatively, the last wire drawing process included in the first short-circuit welding cycle may also include only a partial wire drawing process. This application does not impose any limitations on this.

[0066] In one possible implementation, after the start of the first short-circuit welding cycle, in any wire drawing cycle, the controller can perform short-circuit welding as follows: when the actual welding voltage is detected to be zero, wire drawing is performed at a set wire drawing speed; then, when the actual welding voltage is detected to increase from zero to a preset value, wire feeding is performed at a set second wire feeding speed.

[0067] In other words, after the controller determines that the first AC pulse welding cycle has ended and accelerates wire feeding, when it detects that the actual welding voltage is zero, it starts the first short-circuit welding cycle. After the first short-circuit welding cycle begins, the controller controls the wire feeding motor to rotate in the reverse direction to feed wire at a set wire feeding speed. Then, when it detects that the actual welding voltage has increased from zero to a preset value, the controller controls the wire feeding motor to rotate in the forward direction to feed wire at a set second wire feeding speed. After that, when it detects that the actual welding voltage is zero again, the controller controls the wire feeding motor to rotate in the reverse direction to feed wire at a set wire feeding speed. After that, when it detects that the actual welding voltage has increased from zero to a preset value, the controller controls the wire feeding motor to rotate in the forward direction to feed wire at a set second wire feeding speed. This process is repeated, alternating between wire feeding and wire feeding, until the first short-circuit welding cycle ends.

[0068] Optionally, the drawing speed, the second wire feeding speed, and the preset value can all be set according to the needs of the actual application scenario. Optionally, the second wire feeding speed can be greater than the first wire feeding speed.

[0069] Optionally, the set short-circuit welding parameters may include the average welding voltage and the peak arc current (e.g., during a single wire drawing cycle) during a single wire drawing cycle. Figure 2 The duration of the welding voltage (as shown). In actual welding, to maintain welding stability, the average welding voltage can be kept constant in each wire drawing cycle. Based on this, in one possible implementation, the controller performs short-circuit welding with the set short-circuit welding parameters when starting the first short-circuit welding cycle, which can be achieved as follows:

[0070] First, after the start of the first short-circuit welding period, each of the short-circuit welding wire drawing periods is determined as a target wire drawing period in turn. Then, for each target wire drawing period, the welding current of the next wire drawing period of the target wire drawing period is adjusted in the manner shown in the following table: Figure 4

[0071] Step S301, determine a third voltage average.

[0072] The third voltage average is the average of the actual welding voltage in the target wire drawing period. After the start of the first short-circuit welding period, the controller can obtain the actual welding voltage in the short-circuit welding in real time, and then calculate the average of the actual welding voltage in the target wire drawing period according to the obtained actual welding voltage, i.e. the third voltage average.

[0073] Step S302, if the third voltage average is different from the fourth voltage average, adjust the duration of the arc peak current in the next wire drawing period of the target wire drawing period, so that the average of the actual welding voltage in the next wire drawing period of the target wire drawing period is equal to the fourth voltage average.

[0074] The fourth voltage average is the average of the welding voltage in a single wire drawing period set.

[0075] After the controller determines the third voltage average, if the third voltage average is different from the fourth voltage average, it means that the average of the actual welding voltage in the target wire drawing period deviates from the average of the welding voltage in a single wire drawing period set. Then the controller can adjust the duration of the arc peak current in the next wire drawing period of the target wire drawing period, so that the average of the actual welding voltage in the next wire drawing period of the target wire drawing period returns to the average of the welding voltage in a single wire drawing period set. That is, in the next wire drawing period of the target wire drawing period, the controller no longer welds in the arc peak value stage with the duration of the arc peak value current set in a single wire drawing period, but adjusts the duration of the arc peak value current in the next wire drawing period of the target wire drawing period according to the deviation between the average of the actual welding voltage in the target wire drawing period and the average of the welding voltage in a single wire drawing period set, so that the average of the actual welding voltage in the next wire drawing period of the target wire drawing period returns to the average of the welding voltage in a single wire drawing period set, thereby ensuring the stability of welding.

[0076] ​Optionally, when the third voltage average is greater than the fourth voltage average, the duration of the arc peak current in the next drawing cycle of the target drawing cycle is reduced based on the duration of the arc peak current in the set single drawing cycle, so that the average of the actual welding voltage in the next drawing cycle of the target drawing cycle is equal to the average of the welding voltage in the set single drawing cycle, thereby ensuring the stability of the welding. Conversely, when the third voltage average is less than the fourth voltage average, the duration of the arc peak current in the next drawing cycle of the target drawing cycle is increased based on the duration of the arc peak current in the set single drawing cycle, so that the average of the actual welding voltage in the next drawing cycle of the target drawing cycle is equal to the average of the welding voltage in the set single drawing cycle, thereby ensuring the stability of the welding. It should be understood that when the third voltage average is equal to the fourth voltage average, the duration of the arc peak current in the set single drawing cycle is used as the duration of the arc peak current in the next drawing cycle of the target drawing cycle for the arc peak stage welding.

[0077] In this way, after the start of the first short-circuit welding cycle, the duration of the arc peak current in the next drawing cycle can be adjusted in time through the deviation between the average of the actual welding voltage in each drawing cycle and the average of the welding voltage in the set single drawing cycle, so as to adjust the average of the actual welding voltage in the next drawing cycle to the average of the welding voltage in the set single drawing cycle, ensure the average of the welding voltage in each drawing cycle, and further ensure the stability of the welding, which is more suitable.

[0078] It should be noted that the set short-circuit welding parameters can also include other parameters, which are not listed one by one here.

[0079] Based on this, when the duration of the arc peak current is not adjusted in the manner shown in Figure 4 , the short-circuit welding can be performed according to the set short-circuit welding parameters. When the duration of the arc peak current needs to be adjusted in the manner shown in Figure 4 , the duration of the arc peak welding current can be adjusted in the manner shown in Figure 4 , and the rest of the short-circuit welding stage is welded according to the set short-circuit welding parameters.

[0080] Step S104, adjusting the wire feeding speed when the first short-circuit welding cycle ends.

[0081] In a possible implementation, the number of the wire drawing periods in a single short circuit welding period can be preset. For example, the number of the wire drawing periods in a single short circuit welding period can be set as a second preset number. The specific value of the second preset number can be set according to the requirements of an actual application scenario. Then, whether the first short circuit welding period ends can be determined according to the number of the wire drawing periods.

[0082] In this application scenario, after the first short circuit welding period starts, the controller can also count the number of the wire drawing periods. When the number of the wire drawing periods reaches the second preset number, the controller can determine that the first short circuit welding period ends.

[0083] In a possible implementation, the duration of a single short circuit welding period can also be preset. For example, the duration of a single short circuit welding period can be set as a second preset duration. The specific value of the second preset duration can be set according to the requirements of an actual application scenario. Then, whether the first short circuit welding period ends can be determined according to the welding duration of the short circuit welding.

[0084] In this application scenario, after the first short circuit welding period starts, the controller can also count the duration of the short circuit welding (hereinafter referred to as a second welding duration). When the second welding duration reaches the second preset duration, the controller can determine that the first short circuit welding period ends.

[0085] When the controller determines that the first short circuit welding period ends, the wire feeding speed can be adjusted, so that the wire feeding speed is adjusted to the first wire feeding speed.

[0086] When the wire feeding speed is adjusted to the first wire feeding speed, the next alternating current pulse welding period of the first alternating current pulse welding period is started, the wire is fed at the first wire feeding speed, and the alternating current pulse welding is performed according to the pulse welding parameters.

[0087] When the controller determines that the first short circuit welding period ends, the wire feeding speed is adjusted to the first wire feeding speed, and then the wire drawing short circuit welding is switched to the alternating current pulse welding, the next alternating current pulse welding period of the first alternating current pulse welding period is started, the wire is fed at the first wire feeding speed in the next alternating current pulse welding period of the first alternating current pulse welding period, and the alternating current pulse welding is performed according to the set pulse welding parameters. For details, refer to the foregoing embodiments, which will not be described herein again.

[0088] It should be noted that, Figures 1 to 4 The welding method shown only describes the implementation process of a certain alternating current pulse welding period-wire drawing short circuit welding period-alternating current pulse welding period in the welding process. In actual welding, the foregoing embodiments can be referred to.Figures 1 to 4 The method alternately performs the alternating current pulse welding and the drawn wire short circuit welding until the welding is completed.

[0089] The welding method provided by the present application is further described below with specific application examples.

[0090] Exemplarily, for a workpiece of a thin plate aluminum profile connected with cast aluminum, for example, a corner joint workpiece of an aluminum profile with a thickness of 2 mm connected with cast aluminum with a thickness of 15 mm, the alternating current pulse welding process can be used to open the molten pool, increase the deposition amount, and reduce the heat input to the base material, and then the drawn wire short circuit welding process can be used to cool the molten pool and reduce the overall heat input. In this way, the welding angle with a larger size is ensured, the heat input is reduced, the arc interference resistance is increased, the precipitation of the base material cast aluminum is reduced, the weld quality is ensured, and the welding effect is better.

[0091] As can be seen from the above, in the welding method provided by the embodiments of the present application, the welding is performed in an alternating manner of alternating current pulse welding and drawn wire short circuit welding, wherein the alternating current pulse welding process can open the molten pool, increase the deposition amount, and reduce the heat input to the base material, and the drawn wire short circuit welding process can cool the molten pool and further reduce the overall heat input of the welding. Thus, the welding can be performed with a lower heat input while obtaining a welding angle with a larger size, the arc interference resistance to external interference can be increased, the weld quality can be ensured, and the welding effect is better.

[0092] It can be understood that the above embodiments are only examples, and the above embodiments can be deformed in actual implementation. Those skilled in the art can understand that the deformed methods of the above embodiments without creative labor all fall within the protection scope of the present application, and thus the embodiments will not be described again.

[0093] Based on the same inventive concept, the embodiments of the present application also provide a welding device. Since the principle of the problem solved by the welding device is similar to the welding method described above, the implementation of the welding device can be referred to the implementation of the welding method described above, and the repeated parts will not be described again.

[0094] Referring to Figure 5 , Figure 5 is a structural block diagram of a welding device provided by the embodiments of the present application. As Figure 5 shown, the welding device 500 can include a first control module 501, a second control module 502, a third control module 503, a fourth control module 504, and a fifth control module 505. Among them,

[0095] The first control module 501 can be used to constantly feed the wire at a first wire feeding speed after the start of the first alternating current pulse welding period, and perform alternating current pulse welding at the set pulse welding parameters.

[0096] The second control module 502 can be configured to accelerate wire feeding and detect an actual welding voltage when the first alternating current pulse welding cycle ends.

[0097] The third control module 503 can be configured to start a first short circuit welding cycle, alternately feed and draw the wire, and perform short circuit welding with preset short circuit welding parameters when the actual welding voltage is detected to be zero.

[0098] The fourth control module 504 can be configured to adjust the wire feeding speed when the first short circuit welding cycle ends.

[0099] The fifth control module 505 can be configured to start a next alternating current pulse welding cycle of the first alternating current pulse welding cycle, constantly feed the wire at the first wire feeding speed, and perform alternating current pulse welding with the pulse welding parameters when the wire feeding speed is adjusted to the first wire feeding speed.

[0100] In a possible implementation, the device further includes a first counting module configured to count a number of alternating current pulses in the alternating current pulse welding after the first alternating current pulse welding cycle starts; and a first determining module configured to determine that the first alternating current pulse welding cycle ends when the number of alternating current pulses reaches a first preset number.

[0101] In a possible implementation, the device further includes a first timing module configured to time a first welding duration of the alternating current pulse welding after the first alternating current pulse welding cycle starts; and a second determining module configured to determine that the first alternating current pulse welding cycle ends when the first welding duration reaches a first preset duration.

[0102] In a possible implementation, the first control module 501 is configured to perform alternating current pulse welding with preset pulse welding parameters after the first alternating current pulse welding cycle starts, and specifically, the first control module 501 is configured to: after the first alternating current pulse welding cycle starts, sequentially determine each pulse cycle in the alternating current pulse welding as a target pulse cycle, and adjust a welding current in a next pulse cycle of the target pulse cycle as follows: determine a first voltage average value; the first voltage average value is an average value of an actual welding voltage in the target pulse cycle; if the first voltage average value is different from a second voltage average value, adjust a duration of a positive base value welding current in the next pulse cycle of the target pulse cycle, so that an average value of the actual welding voltage in the next pulse cycle of the target pulse cycle is equal to the second voltage average value; the second voltage average value is an average value of a welding voltage in a preset single pulse cycle.

[0103] ​In a possible implementation, the apparatus further includes a second counting module, configured to count a number of pull-wire periods in the short-circuit welding after the first short-circuit welding period is started; the pull-wire period includes a pull-wire stage and a wire-feeding stage connected therewith; and a third determining module, configured to determine that the first short-circuit welding period ends when the number of pull-wire periods reaches a second preset number.

[0104] In a possible implementation, the apparatus further includes a second timing module, configured to time a second welding duration of the short-circuit welding after the first short-circuit welding period is started; and a fourth determining module, configured to determine that the first short-circuit welding period ends when the second welding duration reaches a second preset duration.

[0105] In a possible implementation, the third control module 503 is configured to start the first short-circuit welding period when the actual welding voltage is detected to be zero, and alternately perform the pull-wire and the wire-feeding, specifically: the third control module 503 is configured to: start the first short-circuit welding period when the actual welding voltage is detected to be zero, and perform the pull-wire at a set pull-wire speed when the actual welding voltage is detected to be zero in any one pull-wire period; and perform the wire-feeding at a set second wire-feeding speed when the actual welding voltage is detected to increase from zero to a preset value.

[0106] In a possible implementation, the third control module 503 is configured to perform the short-circuit welding with a set short-circuit welding parameter, specifically: the third control module 503 is configured to: determine each pull-wire period in the short-circuit welding as a target pull-wire period in sequence, and adjust a welding current in a next pull-wire period of the target pull-wire period as follows: determine a third voltage average value; the third voltage average value is an average value of the actual welding voltage in the target pull-wire period; if the third voltage average value is different from a fourth voltage average value, adjust a duration of an arc-ignition peak current in the next pull-wire period of the target pull-wire period, so that an average value of the actual welding voltage in the next pull-wire period of the target pull-wire period is equal to the fourth voltage average value; and the fourth voltage average value is an average value of the welding voltage in a set single pull-wire period.

[0107] Referring to Figure 6 , Figure 6 A structural block diagram of a computer device provided by the embodiment is shown in FIG. 6. Figure 6 As shown in FIG. 6, the computer device 600 can include a processor 601 and a memory 602; the memory 602 can be coupled to the processor 601. It is worth noting that the structure shown in FIG. 6 is exemplary; other types of structures can also be used to supplement or replace the structure to implement telecommunication functions or other functions. Figure 6 As shown in FIG. 6, the computer device 600 can include a processor 601 and a memory 602; the memory 602 can be coupled to the processor 601. It is worth noting that the structure shown in FIG. 6 is exemplary; other types of structures can also be used to supplement or replace the structure to implement telecommunication functions or other functions.

[0108] In a possible implementation, the functions of the welding device 500 can be integrated into the processor 601.

[0109] In a possible implementation, the welding device 500 can be configured separately from the processor 601, for example, the welding device 500 can be configured as a chip connected to the processor 601, and the switching is realized through the control of the processor 601.

[0110] In addition, in some optional implementations, the computer device 600 can further include a communication module, an input unit, an audio processor, a display, a power supply, and the like. It is worth noting that the computer device 600 does not necessarily include all the components shown in Figure 6 In addition, the computer device 600 can further include components not shown in Figure 6 In addition, the computer device 600 can further include components not shown in

[0111] In some optional implementations, the processor 601, also sometimes referred to as a controller or operating control, can include a microprocessor or other processor device and / or logic device, which receives input and controls the operation of the various components of the computer device 600.

[0112] The memory 602, for example, can be one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. Information related to the welding device 500 described above can be stored, and programs for executing the related information can also be stored. The processor 601 can execute the programs stored in the memory 602 to achieve information storage or processing, and the like.

[0113] The input unit can provide input to the processor 601. The input unit is, for example, a key or a touch input device. The power supply can be used to provide power to the computer device 600. The display can be used to display display objects such as images and text. The display can be, for example, an LCD display, but is not limited thereto.

[0114] The memory 602 can be a solid-state memory, for example, a read-only memory (ROM), a random access memory (RAM), a SIM card, and the like. It can also be a memory that saves information even when power is off, can be selectively erased, and is provided with more data, examples of which are sometimes referred to as EPROM, and the like. The memory 602 can also be some other type of device. The memory 602 includes a buffer memory (sometimes referred to as a buffer). The memory 602 can include an application / function storage portion for storing application programs and function programs or for executing the flow of the operation of the computer device 600 by the processor 601.

[0115] The memory 602 can also include a data storage section for storing data such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage section of the memory 602 can include various drivers for the communication functions of the computer device and / or for performing other functions of the computer device (e.g., messaging applications, address book applications, etc.).

[0116] The communication module is a transmitter / receiver that transmits and receives signals via an antenna. The communication module (transmitter / receiver) is coupled to the processor 601 to provide input signals and receive output signals, as in the case of a conventional mobile communication terminal.

[0117] Based on different communication technologies, a plurality of communication modules such as a cellular network module, a Bluetooth module, and / or a wireless LAN module, etc. can be provided in the same computer device. The communication module (transmitter / receiver) is also coupled to a speaker and a microphone via an audio processor to provide audio output via the speaker and receive audio input from the microphone, thereby implementing the usual telecommunication functions. The audio processor can include any suitable buffers, decoders, amplifiers, etc. In addition, the audio processor is also coupled to the processor 601, thereby enabling recording on the local device via the microphone and enabling playing of stored sounds on the local device via the speaker.

[0118] The embodiments of the present application further provide a computer readable storage medium capable of implementing all the steps of the welding method in the above-mentioned embodiments, and the computer program stored on the computer readable storage medium is executed by a processor to implement all the steps of the welding method in the above-mentioned embodiments.

[0119] Although the present application provides the method operation steps as described in the embodiments or flowcharts, more or less operation steps can be included based on conventional or non-inventive labor. The order of steps listed in the embodiments is only one of the many execution orders of the steps, and does not represent the only execution order. In actual device or client product execution, the method order shown in the embodiments or the drawings can be executed in sequence or in parallel (for example, in a parallel processor or multi-thread processing environment).

[0120] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, device (system) or computer program product. Therefore, the embodiments of the present application can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0121] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0122] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0123] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0124] The various embodiments described in this specification are intended to be illustrative only and not in limitation of the application. In particular, the device and system embodiments are described relatively simply as they are substantially similar to the method embodiments. In this document, relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "upper", "lower", and the like, as used herein refer to the orientation or position shown in the figures and are used for convenience only to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that a specific orientation, configuration, or arrangement of the devices or elements is required or is to be inferred from the terms "upper", "lower", and the like. Unless otherwise defined, the terms "install", "connected", "connecting", and the like, are to be construed broadly, for example, as including fixed connections, detachable connections, or integrally connected; as including mechanical connections, electrical connections, or the like; and as including direct connections, or indirect connections through an intermediate medium, or internal connections of two elements. The specific meaning of the terms "install", "connected", "connecting", and the like, in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. It should be noted that the embodiments and features in the present application can be combined with each other without conflict, and each aspect and / or embodiment of the present application can be used alone or in combination with one or more other aspects and / or embodiments.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

[0126] The application has been described above with reference to preferred embodiments. However, these embodiments are merely exemplary and are presented for purposes of illustration only. Variations and modifications to the application can be made based on what is described herein by a person of ordinary skill in the art. Such variations and modifications are considered to be within the scope of the application.

Claims

1. A welding method characterized by, The method comprises: After the first alternating current pulse welding cycle starts, wire feeding is constant at a first wire feeding speed, and alternating current pulse welding is performed at set pulse welding parameters; When the first alternating current pulse welding cycle ends, accelerated wire feeding is performed, and an actual welding voltage is detected; When the actual welding voltage is detected to be zero, a first short circuit welding cycle is started, wire drawing and wire feeding are alternately performed, and short circuit welding is performed at set short circuit welding parameters; When the first short circuit welding cycle ends, the wire feeding speed is adjusted; When the wire feeding speed is adjusted to the first wire feeding speed, the next alternating current pulse welding cycle of the first alternating current pulse welding cycle is started, wire feeding is constant at the first wire feeding speed, and alternating current pulse welding is performed at the pulse welding parameters; The method further comprises: After the first alternating current pulse welding cycle starts, the number of alternating current pulses in the alternating current pulse welding is counted; When the number of alternating current pulses reaches a first preset number, it is determined that the first alternating current pulse welding cycle ends. The method further comprises:

2. The method of claim 1, wherein, After the first alternating current pulse welding cycle starts, a first welding time length of the alternating current pulse welding is timed; When the first welding time length reaches a first preset time length, it is determined that the first alternating current pulse welding cycle ends. The method further comprises:

3. The method of claim 1, wherein, After the first alternating current pulse welding cycle starts, each pulse cycle in the alternating current pulse welding is sequentially determined as a target pulse cycle, and the welding current in the next pulse cycle of the target pulse cycle is adjusted as follows: A first voltage average is determined; the first voltage average is an average of the actual welding voltage in the target pulse cycle; If the first voltage average is different from a second voltage average, the duration of the forward base value welding current in the next pulse cycle of the target pulse cycle is adjusted, so that the average of the actual welding voltage in the next pulse cycle of the target pulse cycle is equal to the second voltage average; the second voltage average is an average of the welding voltage in a set single pulse cycle.

4. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: After the first short circuit welding cycle is started, the number of wire drawing cycles in the short circuit welding is counted; the wire drawing cycle comprises a wire drawing stage and a wire feeding stage connected thereto; The method further comprises: After the first short circuit welding cycle is started, the number of wire drawing cycles in the short circuit welding is counted; the wire drawing cycle comprises a wire drawing stage and a wire feeding stage connected thereto; 5. The method of claim 1, wherein, ​ ​ When the number of the wire drawing periods reaches a second preset number, it is determined that the first short circuit welding period ends.

6. The method of claim 1, wherein, The method further comprises: After starting the first short circuit welding period, timing a second welding duration of the short circuit welding; When the second welding duration reaches a second preset duration, it is determined that the first short circuit welding period ends.

7. The method of claim 5, wherein, When the actual welding voltage is detected to be zero, starting the first short circuit welding period, and in any one wire drawing period, when the actual welding voltage is detected to be zero, drawing the wire at a set wire drawing speed; and when the actual welding voltage is detected to increase from zero to a preset value, feeding the wire at a set second wire feeding speed. The device comprises:

8. A welding device characterized by, A first control module configured to, after starting the first alternating current pulse welding period, constantly feed the wire at a first wire feeding speed, and perform alternating current pulse welding at set pulse welding parameters; A second control module configured to, when the first alternating current pulse welding period ends, accelerate wire feeding, and detect an actual welding voltage; A third control module configured to, when the actual welding voltage is detected to be zero, start the first short circuit welding period, alternately draw and feed the wire, and perform short circuit welding at set short circuit welding parameters; The third control module is configured to perform short circuit welding at the set short circuit welding parameters, and specifically comprises: sequentially determining each wire drawing period in the short circuit welding as a target wire drawing period, and adjusting a welding current of a next wire drawing period of the target wire drawing period as follows: determining a third voltage average value; the third voltage average value is an average value of the actual welding voltage in the target wire drawing period; if the third voltage average value is different from a fourth voltage average value, adjusting a duration of an arc striking peak current in the next wire drawing period of the target wire drawing period, so that an average value of the actual welding voltage in the next wire drawing period of the target wire drawing period is equal to the fourth voltage average value; the fourth voltage average value is an average value of the welding voltage in a set single wire drawing period; A fourth control module configured to, when the first short circuit welding period ends, adjust the wire feeding speed; A fifth control module configured to, when the wire feeding speed is adjusted to the first wire feeding speed, start a next alternating current pulse welding period of the first alternating current pulse welding period, constantly feed the wire at the first wire feeding speed, and perform alternating current pulse welding at the pulse welding parameters. A computer program product comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 7 when executing the computer program.

9. A computer device, comprising: A computer program product comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 7 when executing the computer program.

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