A method and device for controlling abnormal pulse welding voltage

Abstract

A method for controlling pulse welding voltage anomalies includes: determining whether an electric welder is in a twin-wire welding mode; when the electric welder is in the twin-wire welding mode and a slave is determined to be in a magnetic blow state, enabling a second pulse for the slave; determining a peak time and a peak current of the second pulse; and outputting the second pulse to the slave. Also disclosed is a welding device for controlling pulse welding voltage anomalies.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of welding, and more particularly, to a method for controlling abnormal pulse welding voltage and a welding device. Background Art

[0002] With the development of welding technology, MIG / MAG welding is increasingly being used in actual welding operations, and the technology is becoming increasingly mature. Pulse welding is widely used in welding operations across various industries due to its ease of operation and minimal spatter. When using pulse welding for twin-wire welding, the slave device is significantly affected by the master device, and voltage rises are prone to occur during the slave device's base phase, causing arc blow and even arc failure. During DC arc welding, the phenomenon of arc blow due to electromagnetic forces is called magnetic blow. Especially during the arc striking and arc ending phases, when welding at the workpiece edge, the magnetic flux density is squeezed and deformed, resulting in different flux densities in front of and behind the arc.

[0003] In twin-wire welding, when the host starts to strike the arc, the output voltage of the host begins to rise, and the slave is in the base value stage. However, at this time, the base value voltage of the slave is easily affected by the host, resulting in voltage fluctuations, causing arc blow or even arc breakage. Summary of the Invention

[0004] At least one embodiment of the present disclosure provides a method for controlling pulse welding voltage abnormality, comprising:

[0005] Determine the welding mode of the welding machine;

[0006] According to the welding mode of the electric welder, determine whether the electric welder is in the magnetic blow state;

[0007] In the case of determining that the electric welder is in a magnetic blow state, enabling a second pulse for the electric welder;

[0008] determining the peak time and peak current of the second pulse according to the welding mode of the electric welder; and

[0009] The second pulse is output according to the peak time and peak current of the second pulse.

[0010] In one embodiment of the present disclosure, determining the welding mode of the electric welder includes:

[0011] The master sends a synchronization signal to the slave;

[0012] In response to receiving a confirmation signal sent by the slave, confirming that the electric welder is in a twin-wire welding mode; and

[0013] In the case of not receiving a confirmation signal from the slave machine, it is confirmed that the electric welder is in single-wire welding mode.

[0014] In one embodiment of the present disclosure, determining that the electric welder is in a magnetic blow state includes:

[0015] In response to determining that the electric welder is in a twin-wire welding mode, when the master enters a pulse rising period, determining a difference between a master peak current and a slave base current; and

[0016] When the difference is smaller than the first current threshold, it is determined that the slave is in a magnetic blow state.

[0017] In one embodiment of the present disclosure, the first current threshold is 440A.

[0018] In one embodiment of the present disclosure, determining that the electric welder is in a magnetic blow state includes:

[0019] In response to determining that the electric welder is in a twin-wire welding mode, determining a slave voltage within a first predetermined time after the master enters a pulse rising period; and

[0020] When the slave voltage continues to rise within the first predetermined time, it is determined that the electric welder is in a magnetic blow state.

[0021] In one embodiment of the present disclosure, the first predetermined time is 100 microseconds.

[0022] In one embodiment of the present disclosure, determining that the electric welder is in a magnetic blow state includes:

[0023] In response to determining that the electric welder is in the single-wire welding mode, when a base current of a welding pulse is less than 80A, it is determined that the electric welder is in a magnetic blow state.

[0024] In one embodiment of the present disclosure, determining the peak current and peak time of the second pulse includes:

[0025] When the electric welder is in double-wire welding mode, the peak current of the second pulse is determined as the peak adjustment current, wherein the deviation between the peak adjustment current and the host peak current is less than the second current threshold, and the peak time of the host pulse is determined as the peak time of the second pulse.

[0026] In one embodiment of the present disclosure, the method further includes: at the end of the peak time of the host pulse, determining the slave voltage within a second predetermined time before the end time point of the peak time of the host pulse; if the slave voltage is still rising within the second predetermined time, continuing to output the second pulse until the next pulse of the slave starts.

[0027] In one embodiment of the present disclosure, determining the peak time of the second pulse includes:

[0028] When the electric welder is in single-wire welding mode, the difference between the peak current and the base current of the welding pulse is determined as the peak current of the second pulse, and one third to one half of the base time of the welding pulse is determined as the peak time of the second pulse.

[0029] In one embodiment of the present disclosure, the second predetermined time is 100 microseconds.

[0030] At least one embodiment of the present disclosure provides a welding device for controlling abnormal pulse welding voltage, comprising:

[0031] a working mode determining unit configured to determine a welding working mode of the welding device;

[0032] a magnetic blow state determining unit configured to determine whether the welding device is in a magnetic blow state according to a welding working mode of the welding device;

[0033] a second pulse enabling unit configured to enable a second pulse when the welding device is in a magnetic blow state;

[0034] a peak current determining unit configured to determine a peak current of the second pulse when the second pulse is enabled;

[0035] a peak time determination unit configured to determine a peak time of the second pulse when the second pulse is enabled; and

[0036] The output unit is configured to output the second pulse according to the peak current of the second pulse and the peak time of the second pulse.

[0037] In one embodiment of the present disclosure, the working mode determination unit includes:

[0038] A synchronization signal sending subunit configured to send a welding synchronization signal to the slave machine;

[0039] a confirmation signal receiving subunit, configured to receive a confirmation signal from the slave; and

[0040] The twin-wire welding mode determination subunit is configured to determine that the welding device is in the twin-wire welding mode if the confirmation signal is received, and to determine that the welding device is in the single-wire welding mode if the confirmation signal is not received.

[0041] In one embodiment of the present disclosure, the magnetic blow state determining unit includes a current difference determining subunit and a magnetic blow state first determining subunit:

[0042] In response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, the current difference determination subunit is configured to determine the difference between the host peak current and the slave base current when the host enters a pulse rising period; and

[0043] The magnetic blow state first determining subunit is configured to determine that the welding device is in a magnetic blow state when the difference is less than a first current threshold.

[0044] In one embodiment of the present disclosure, the magnetic blow state determining unit includes a first slave voltage determining subunit and a second magnetic blow state determining subunit:

[0045] In response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, the slave voltage first determination subunit is configured to determine the slave voltage within a first predetermined time period after the master enters a pulse rising period; and

[0046] The second magnetic blow state determining subunit is configured to determine that the welding device is in the magnetic blow state if the slave voltage continues to rise within the first predetermined time.

[0047] In one embodiment of the present disclosure, the first predetermined time is 100 microseconds.

[0048] In one embodiment of the present disclosure, the magnetic blow state determining unit includes a pulse base current determining subunit and a magnetic blow state third determining subunit; wherein:

[0049] In response to the working mode determination unit determining that the welding device is in the single-wire welding mode, the pulse base current determination subunit is configured to determine the base current of the welding pulse, and the magnetic blow state third determination subunit is configured to determine that the welding device is in the magnetic blow state when the base current of the welding pulse is less than a third current threshold.

[0050] In one embodiment of the present disclosure, the third current threshold is 80A.

[0051] In one embodiment of the present disclosure, the peak current determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, determine the peak current of the second pulse as the peak adjustment current, wherein the deviation between the peak adjustment current and the host peak current is less than a second current threshold.

[0052] In one embodiment of the present disclosure, the peak time determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, determine the peak time of the main pulse as the peak time of the second pulse.

[0053] In one embodiment of the present disclosure, the peak time determination unit includes:

[0054] a second slave voltage determining subunit configured to, in response to the working mode determining unit determining that the welding device is in the twin-wire welding mode, determine the slave voltage within a second predetermined time before the end time point of the peak time of the master pulse when the peak time of the master pulse ends; and

[0055] The peak time determining subunit is configured to determine to output the second pulse until the next pulse of the slave starts if the slave voltage is still rising within the second predetermined time.

[0056] In one embodiment of the present disclosure, the second predetermined time is 100 microseconds.

[0057] In one embodiment of the present disclosure, the peak current determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the single-wire welding mode, use the difference between the peak current and the base current of the welding pulse as the peak current of the second pulse.

[0058] In one embodiment of the present disclosure, the peak time determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the single-wire welding mode, use one third to one half of the base time of the welding pulse as the peak time of the second pulse.

[0059] At least one embodiment of the present disclosure provides a non-volatile storage medium having stored thereon a computer program executable by a processor. In response to the processor executing the computer program, the processor is configured to implement the operations of any of the above-mentioned methods for controlling pulse welding voltage abnormalities.

[0060] At least one embodiment of the present disclosure further provides a computer program product, which includes a computer program executable by a processor. When the computer program is executed by the processor, the processor is configured to implement the operations of any of the above-mentioned methods for controlling pulse welding voltage abnormalities.

[0061] In the method and welding device for controlling pulse welding voltage abnormality according to the embodiments of the present disclosure, the slave outputs a second pulse when the host outputs a peak pulse, and the trend of the slave base voltage rising is greatly improved, which greatly reduces the probability of magnetic blow. The waveform parameters can be adjusted quickly, the current waveform output is normal, the welding arc is stable, and the welding quality is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 A schematic diagram showing voltage waveforms and current waveforms of a master machine and a slave machine during pulse dual-machine welding in conventional technology;

[0063] Figure 2 shows the current output waveform under normal welding conditions;

[0064] Figure 3 A schematic diagram of the current phase matching between the master and slave machines during pulsed dual-machine welding is shown;

[0065] Figure 4 The actual voltage output waveforms of the master and slave devices in the presence of magnetic blow are shown.

[0066] Figure 5 A flow chart showing a method for controlling pulse welding voltage abnormality according to an embodiment of the present disclosure is shown;

[0067] Figure 6 A flow chart of determining whether an electric welder is in a double-wire welding mode in a method according to an embodiment of the present disclosure is shown;

[0068] Figure 7 A flow chart of determining whether a slave is in a magnetic blow state in a method according to an embodiment of the present disclosure is shown;

[0069] Figure 8 A flow chart of determining whether a slave is in a magnetic blow state in a method according to another embodiment of the present disclosure is shown;

[0070] Figure 9 A structural block diagram of a welding device for controlling abnormal pulse welding voltage according to an embodiment of the present disclosure is shown;

[0071] Figure 10 A structural block diagram of a working mode determination unit in a welding device for controlling abnormal pulse welding voltage according to an embodiment of the present disclosure is shown;

[0072] Figure 11 A structural block diagram of a magnetic blow state determining unit in a welding device for controlling abnormal pulse welding voltage according to an embodiment of the present disclosure is shown;

[0073] Figure 12 A structural block diagram of a magnetic blow state determining unit in a welding device for controlling abnormal pulse welding voltage according to another embodiment of the present disclosure is shown;

[0074] Figure 13 A structural block diagram of a magnetic blow state determining unit in a welding device for controlling abnormal pulse welding voltage according to another embodiment of the present disclosure is shown; and

[0075] Figure 14 A structural block diagram of a peak time determination unit in a welding device for controlling abnormal pulse welding voltage according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0076] The present disclosure is further described in detail below with reference to the accompanying drawings and examples, through which the features and advantages of the present disclosure will become more clearly understood.

[0077] The word "exemplary" is used exclusively herein to mean "serving as an example, example, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0078] In addition, the technical features involved in different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0079] When using pulsed double wire welding, in order to minimize the interference between the two arcs, the master and slave welding equipment generally perform phase control, with the master peak value and the slave base value output alternately. The actual waveform is as follows: Figure 1 shown.

[0080] like Figure 1 As shown, the waveforms shown in the upper portion are the host voltage and current waveforms, and the waveform output is relatively normal. The waveforms shown in the lower portion are the slave voltage and current waveforms. It can be seen that when the host pulse is at its peak stage, the slave is at its base stage. At this time, the slave base voltage is unstable and climbing, causing magnetic arc blow. Magnetic blow occurs throughout the welding process, but is more severe at the end of the welding process because the arc is quenched at the end of the welding process. In severe cases, arc breakage occurs, seriously affecting arc stability and welding quality. This phenomenon is more serious when welding to the end of the workpiece. When single-wire welding is near the end of the workpiece, arc magnetic blow also occurs. Existing technical means mainly use methods such as changing the distribution of the ground wire and lowering the set voltage to reduce this arc blow phenomenon. To ensure welding quality, some users adopt the method of adding an arc quenching test plate at the end of the workpiece. The so-called arc quenching test plate refers to an additional welding length that prevents welding of the required length from occurring during the arc quenching stage, thereby ensuring welding quality.

[0081] When the welding machine leaves the factory, in order to ensure the best welding effect, the relevant expert data will be built into the welding power supply of the welding machine according to the different wire diameters and shielding gases. Under normal welding conditions, according to the built-in expert data current instructions, the current waveform output is as follows Figure 2As shown in the figure, the most important waveform parameters include time, slope, and current. Time parameters include: current rise time T1, peak duration T2, and current fall time T3; slope parameters include current rise slope ISL1 and current fall slope ISL2; and current-related parameters include peak current and base current. Under normal welding conditions, the actual current output waveform will be output according to the command data in the built-in expert.

[0082] Figure 3 Figure 2 shows a schematic diagram of the master and slave current output phase matching in a pulsed dual-machine welding system. Typically, when the master outputs pulse peak current, the slave outputs pulse base current, and when the slave outputs pulse peak current, the master outputs pulse base current. Typically, the master's pulse peak current and the slave's pulse peak current differ. The master's pulse peak current is used to achieve weld penetration and is relatively large, while the slave's pulse peak current is used to achieve weld fillet capping and is relatively small. Of course, the master's pulse peak current can also be used to achieve weld fillet capping, while the slave's pulse peak current is used to achieve weld penetration.

[0083] In actual welding, when the base value stage of the master ends and the rising stage begins, the voltage of the slave is at the base value position. However, due to the influence of magnetic blow, the output voltage of the slave will continue to rise and fall when it reaches the peak value. The actual output voltage waveforms of the master and slave are as follows: Figure 4 As shown. Figure 4 As can be seen in the figure, the output voltage of the master is relatively normal, but the output voltage of the slave increases seriously, which will produce a harsh arc sound during welding and cause magnetic blow of the arc.

[0084] In view of the above problems, at least one embodiment of the present disclosure provides a method for controlling abnormal pulse welding voltage, such as Figure 5 As shown, the method includes:

[0085] S01, determining the welding mode of the electric welder;

[0086] S02, determining whether the electric welder is in a magnetic blow state according to the welding mode of the electric welder;

[0087] S03, when it is determined that the electric welder is in a magnetic blow state, enabling a second pulse for the electric welder;

[0088] S04, determining the peak time and peak current of the second pulse according to the welding mode of the electric welder; and

[0089] S05 , outputting a second pulse according to the peak time and peak current of the second pulse.

[0090] In one embodiment of the present disclosure, Figure 6As shown, in S01, determining whether the electric welder is in the double-wire welding mode includes:

[0091] S011, the master sends a synchronization signal to the slave;

[0092] S012: In response to receiving a confirmation signal sent by the slave, confirming that the electric welder is in a double-wire welding mode, and in the absence of receiving a confirmation signal sent by the slave, confirming that the electric welder is in a single-wire welding mode.

[0093] Different welding modes of electric welders have different states when magnetic blow occurs. During twin-wire welding, if magnetic blow occurs while the master welder is in the pulse rising phase, the output voltage of the slave welder will increase due to the influence of the magnetic blow. At the same time, as the output voltage of the slave welder increases, the base current of the slave welder will also increase.

[0094] If the slave's voltage increases as the master enters the pulse rising phase, the slave's base current also increases, and the difference between the slave's base current and the master's peak current decreases. If the deviation between the slave's base current and the master's peak current is less than a first current threshold, that is, the difference between the master's peak current and the slave's predetermined base current, the slave is considered to be in a magnetic blow state.

[0095] Usually, the output current is set below 200A during welding. At this time, the base current is generally less than 100A, usually between 40A and 80A, and the peak current is generally greater than 480A. The difference between the peak current and the base current is around 440A, and can fluctuate by 50A.

[0096] Therefore, in one embodiment of the present disclosure, the first current threshold is set to 440A.

[0097] Therefore, in one embodiment of the present disclosure, Figure 7 As shown, according to the welding mode of the electric welder, determining that the electric welder is in the magnetic blow state includes:

[0098] S0211, when the electric welder is in a double-wire welding mode, when the master enters a pulse rising period, determining a difference between a master peak current and a slave base current; and

[0099] S0212: When the difference is less than the first current threshold, determine that the slave is in a magnetic blow state.

[0100] In one embodiment of the present disclosure, the first current threshold is 440A.

[0101] In another embodiment of the present disclosure, Figure 8 As shown, determining that the slave is in the magnetic blow state includes:

[0102] S0221, when the electric welder is in a double-wire welding mode, determining the slave voltage within a first predetermined time period after the master enters a pulse rising period; and

[0103] S0222: When the slave voltage continues to rise within the first predetermined time, determine that the slave is in a magnetic blow state.

[0104] Generally speaking, the time length for the slave to output the base current or base voltage is 5000 microseconds. When the host enters the pulse rising period, if the slave voltage is in a rising state within 100 microseconds or 200 microseconds, it can be determined that the slave is in a magnetic blow state.

[0105] Therefore, in one embodiment of the present disclosure, the first predetermined time is 100 microseconds.

[0106] If it is determined that the slave is in the magnetic blow state, it is determined that the slave starts the second pulse.

[0107] The parameters of the second pulse include base current, rise time, peak current, peak time, and fall time. The base current of the second pulse is the same as the base current of the first pulse. When the master and slave are welding simultaneously, if the slave receives the second pulse, the second pulse starts at the rise point of the master.

[0108] When it is determined that the second pulse needs to be initiated for the slave, the peak current and peak time of the second pulse need to be determined.

[0109] The second pulse is started to eliminate the influence of magnetic blow on the slave. If the output voltage of the slave is large enough, the slave's ability to resist magnetic blow will be stronger.

[0110] When determining the peak current of the second pulse, the peak current of the second pulse can be set to a deviation from the peak current of the host within the first current threshold range. At this time, the output voltage of the slave has a smaller deviation relative to the output voltage of the host and is less affected by the output voltage of the host, thereby eliminating the influence of magnetic blow.

[0111] In one embodiment of the present disclosure, determining the peak current of the second pulse includes: determining the peak current of the second pulse as a peak adjustment current, wherein a deviation between the peak adjustment current and the host peak current is less than a second current threshold.

[0112] When the deviation between the peak current of the second pulse and the peak current of the host is less than the second current threshold, the deviation between the peak voltage of the second pulse and the peak voltage of the host will be relatively small, the slave's ability to resist magnetic blow will be stronger, and it will not be greatly affected by magnetic blow.

[0113] In one embodiment of the present disclosure, the peak time of the second pulse is the peak time of the host pulse.

[0114] After the peak time and peak current of the second second pulse are determined, the slave device can output the second pulse according to the peak time and peak current of the second pulse.

[0115] At the end of the peak time of the master pulse, if the output voltage of the slave has stabilized, the second peak current is no longer output.

[0116] In many cases, the slave device is greatly affected by the magnetic blow of the master device. When the peak time of the master pulse ends, the slave device voltage is still on an upward trend. At this time, it is necessary to continue to output the second pulse, which may last until the next pulse of the slave device begins.

[0117] In one embodiment of the present disclosure, at the end of the peak time of the master pulse, the slave voltage within a second predetermined time before the end time point of the peak time of the master pulse is determined; if the slave voltage is still rising within the second predetermined time, the second pulse continues to be output until the next pulse of the slave starts.

[0118] In one embodiment of the present disclosure, the second predetermined time may be 100 microseconds. Of course, in an embodiment of the present disclosure, the second predetermined time may be other durations, for example, 200 microseconds, 300 microseconds, etc. The length of the second predetermined time may be selected according to specific circumstances.

[0119] In addition to operating in a double-wire welding mode, the electric welder can also operate in a single-wire welding mode. When determining in S01 that the electric welder is in the single-wire welding mode, in S02, determining whether the electric welder is in a magnetic blow state according to the welding mode of the electric welder includes:

[0120] S023: When the base current of the welding pulse is less than 80A, it is determined that the electric welder is in a magnetic blow state.

[0121] When it is determined in S023 that the electric welder is in a magnetic blow state, in the method for controlling pulse welding voltage abnormality according to an embodiment of the present disclosure, in S04, determining the peak time and peak current of the second pulse according to the welding mode of the electric welder includes:

[0122] determining a difference between the peak current and the base current of the welding pulse as a peak current of the second pulse; and

[0123] The peak time of the second pulse is determined to be one third to one half of the base time of the welding pulse.

[0124] In the method for controlling pulse welding voltage abnormality according to an embodiment of the present disclosure, the slave outputs a second pulse when the host outputs a peak pulse, and the rising trend of the slave base voltage is greatly improved, which greatly reduces the probability of magnetic blow. The waveform parameters can be adjusted quickly, the current waveform output is normal, the welding arc is stable, and the welding quality is good.

[0125] In at least one embodiment of the present disclosure, a welding device for controlling abnormal pulse welding voltage is also provided.

[0126] In one embodiment of the present disclosure, Figure 9 As shown, the welding device 900 for controlling abnormal pulse welding voltage includes:

[0127] A working mode determining unit 901 is configured to determine a welding working mode of the welding device;

[0128] a magnetic blow state determining unit 902 configured to determine whether a slave of the welding device is in a magnetic blow state according to a welding working mode of the welding device;

[0129] A second pulse enabling unit 903 is configured to enable a second pulse when the welding device is in a magnetic blow state;

[0130] a peak current determining unit 904, configured to determine a peak current of the second pulse when the second pulse is enabled;

[0131] a peak time determining unit 905, configured to determine the peak time of the second pulse when the second pulse is enabled; and

[0132] The output unit 906 is configured to output the second pulse according to the peak current of the second pulse and the peak time of the second pulse.

[0133] In one embodiment of the present disclosure, Figure 10 As shown, the working mode determination unit 901 includes:

[0134] Synchronous signal sending subunit 9011, configured to send welding synchronization signals to the slave;

[0135] a confirmation signal receiving subunit 9012, configured to receive a confirmation signal from a slave; and

[0136] The welding mode determination subunit 9013 is configured to determine that the welding device is in the twin-wire welding mode if the confirmation signal is received, and to determine that the welding device is in the single-wire welding mode if the confirmation signal is not received.

[0137] In the double-wire welding mode, when the master welding machine is in the pulse rising stage, if magnetic blow occurs, the output voltage of the slave machine will increase under the influence of the magnetic blow. At the same time, as the output voltage of the slave machine increases, the base current of the slave machine will also increase.

[0138] If the voltage of the slave increases as the host enters the pulse rising phase, the base current of the slave will also increase, and the difference between the base current of the slave and the peak current of the host will become smaller. If the deviation between the base current of the slave and the peak current of the host is less than the first current threshold, that is, the difference between the peak current of the host and the predetermined base current of the slave, the slave is considered to be in a magnetic blow state. Usually, when welding, the output current is set to below 200A. At this time, the base current is generally less than 100A, usually between 40A and 80A, and the peak current is generally greater than 480A. The difference between the peak current and the base current is in the range of about 440A, and can fluctuate by 50A. In one embodiment of the present disclosure, the first current threshold is set to 440A.

[0139] Therefore, in one embodiment of the present disclosure, Figure 11 As shown, the magnetic blow state determining unit 902 includes a current difference determining subunit 9021 and a magnetic blow state first determining subunit 9022, wherein:

[0140] In response to the working mode determination unit 901 determining that the welding device is in the twin-wire welding mode, the current difference determination subunit 9021 is configured to determine the difference between the host peak current and the slave base current when the host enters the pulse rising period; and

[0141] The first magnetic blow state determining subunit 9022 is configured to determine that the welding device is in a magnetic blow state when the difference is less than a first current threshold.

[0142] In another embodiment of the present disclosure, Figure 12 As shown, the magnetic blow state determining unit 902 includes a first slave voltage determining subunit 9023 and a second magnetic blow state determining subunit 9024; wherein,

[0143] In response to the working mode determining unit 901 determining that the welding device is in the twin-wire welding mode, the slave voltage first determining subunit 9023 is configured to determine the slave voltage within a first predetermined time period after the master enters the pulse rising period, and

[0144] The second magnetic blow state determining subunit 9024 is configured to determine that the slave is in the magnetic blow state if the slave voltage continues to rise within the first predetermined time.

[0145] Generally speaking, the time length for the slave to output the base current or base voltage is 5000 microseconds. When the host enters the pulse rising period, if the slave voltage is in a rising state within 100 microseconds or 200 microseconds, it can be determined that the welding device is in a magnetic blow state.

[0146] Therefore, in one embodiment of the present disclosure, the first predetermined time is 100 microseconds.

[0147] In one embodiment of the present disclosure, Figure 13 As shown, the magnetic blow state determining unit 902 includes a pulse base current determining subunit 9025 and a magnetic blow state third determining subunit 9026; wherein, in response to the working mode determining unit 901 determining that the welding device is in the single wire welding mode,

[0148] The pulse base current determination subunit 9021 is configured to determine a base current of a welding pulse; and

[0149] The third magnetic blow state determining subunit 9026 is configured to determine that the welding device is in a magnetic blow state when the base current of the welding pulse is less than a third current threshold.

[0150] In one embodiment of the present disclosure, the third current threshold is 80A.

[0151] If the magnetic blow state determining unit 902 determines that the welding device is in the magnetic blow state, the second pulse enabling unit 903 determines to initiate a second pulse for the welding device. When the welding device is in the twin-wire welding mode, the second pulse enabling unit 903 determines to initiate the second pulse for the slave device. When the welding device is in the single-wire welding mode, the second pulse enabling unit 903 determines to initiate the second pulse at the base value of the pulse current.

[0152] The parameters of the second pulse include base current, rise time, peak current, peak time, and fall time. The base current of the second pulse is the same as the base current of the first pulse. When the master and slave are welding simultaneously, if the slave receives the second pulse, the second pulse starts at the rise point of the master.

[0153] When it is determined that the second pulse needs to be initiated for the slave, the peak current and peak time of the second pulse need to be determined.

[0154] The second pulse is started to eliminate the influence of magnetic blow on the slave. If the output voltage of the slave is large enough, the slave's ability to resist magnetic blow will be stronger.

[0155] When determining the peak current of the second pulse, the peak current of the second pulse can be set to a deviation from the peak current of the host within the first current threshold range. At this time, the output voltage of the slave has a smaller deviation relative to the output voltage of the host and is less affected by the output voltage of the host, thereby eliminating the influence of magnetic blow.

[0156] In one embodiment of the present disclosure, the peak current determination unit 904 is configured to, in response to the working mode determination unit 901 determining that the welding device is in the twin-wire welding mode, determine the peak current of the second pulse as the peak adjustment current, wherein the deviation between the peak adjustment current and the host peak current is less than a second current threshold.

[0157] When the deviation between the peak current of the second pulse and the peak current of the host is less than the second current threshold, the deviation between the peak voltage of the second pulse and the peak voltage of the host will be relatively small, the slave's ability to resist magnetic blow will be stronger, and it will not be greatly affected by magnetic blow.

[0158] In one embodiment of the present disclosure, the peak time determination unit 905 is configured to, in response to the working mode determination unit 901 determining that the welding device is in the twin-wire welding mode, determine the peak time of the main pulse as the peak time of the second pulse.

[0159] In one embodiment of the present disclosure, the peak current determination unit 904 is configured to, in response to the working mode determination unit 901 determining that the welding device is in the single-wire welding mode, use the difference between the peak current and the base current of the welding pulse as the peak current of the second pulse.

[0160] In one embodiment of the present disclosure, the peak time determination unit 905 is configured to, in response to the working mode determination unit 901 determining that the welding device is in the single-wire welding mode, use one third to one half of the base time of the welding pulse as the peak time of the second pulse.

[0161] After determining the peak time and peak current of the second pulse, the output unit 906 is configured to output the second pulse according to the peak time and peak current of the second pulse.

[0162] At the end of the peak time of the master pulse, if the output voltage of the slave has stabilized, the second peak current is no longer output.

[0163] In many cases of welding devices, the slave will be greatly affected by the magnetic blow of the master. When the peak time of the master pulse ends, the slave voltage is still on an upward trend. At this time, it is necessary to continue to output the second pulse, which may last until the next pulse of the slave starts.

[0164] In one embodiment of the present disclosure, Figure 14As shown, the peak time determination unit 905 also includes: a second slave voltage determination subunit 9051, configured to determine the slave voltage within a second predetermined time before the end time point of the peak time of the master pulse at the end of the peak time of the master pulse; a peak time determination subunit 9052, configured to determine that the second pulse is output until the next slave pulse starts when the slave voltage is still rising within the second predetermined time.

[0165] In one embodiment of the present disclosure, the second predetermined time may be 100 microseconds. Of course, in an embodiment of the present disclosure, the second predetermined time may be other durations, for example, 200 microseconds, 300 microseconds, etc. The length of the second predetermined time may be selected according to specific circumstances.

[0166] In the welding device for controlling abnormal pulse welding voltage according to the embodiment of the present disclosure, the slave outputs a second pulse when the host outputs a peak pulse, and the rising trend of the slave base voltage is greatly improved, which greatly reduces the probability of magnetic blow. The waveform parameters can be adjusted quickly, the current waveform output is normal, the welding arc is stable, and the welding quality is good.

[0167] At least one embodiment of the present disclosure further provides a non-volatile storage medium having stored thereon a computer program executable by a processor. In response to the processor executing the computer program, the processor is configured to implement the operations of any of the above-mentioned methods for controlling pulse welding voltage abnormalities.

[0168] At least one embodiment of the present disclosure further provides a computer program product, comprising a processor-executable computer program. When the computer program is executed by a processor, the processor is configured to implement the operations of any of the above-mentioned methods for controlling pulse welding voltage anomalies.

[0169] In the description of the present disclosure, it should be noted that the terms "upper", "lower", "inside", "outside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of the present disclosure. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present disclosure.

[0170] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0171] The present disclosure has been described above in conjunction with preferred embodiments, but these embodiments are merely exemplary and serve only as an illustration. On this basis, various replacements and improvements can be made to the present disclosure, all of which fall within the scope of protection of the present disclosure.

Claims

1. A method for controlling abnormal pulse welding voltage, comprising: Determine the welding mode of the welding machine; According to the welding mode of the electric welder, determine whether the electric welder is in the magnetic blow state; In the case of determining that the electric welder is in a magnetic blow state, enabling a second pulse for the electric welder; determining the peak time and peak current of the second pulse according to the welding mode of the electric welder; as well as The second pulse is output according to the peak time and peak current of the second pulse.

2. The method according to claim 1, wherein Determine the welding mode of the welding machine including: The master sends a synchronization signal to the slave; In response to receiving a confirmation signal sent by the slave, confirming that the electric welder is in a twin-wire welding mode; and In the case of not receiving a confirmation signal from the slave machine, it is confirmed that the electric welder is in single-wire welding mode.

3. The method according to claim 1, wherein Determining that the electric welder is in a magnetic blow state includes: In response to determining that the electric welder is in a twin-wire welding mode, when the master enters a pulse rising period, determining a difference between a master peak current and a slave base current; and When the difference is smaller than the first current threshold, it is determined that the slave is in a magnetic blow state.

4. The method according to claim 3, wherein: The first current threshold is 440A.

5. The method according to claim 1, wherein Determining that the electric welder is in a magnetic blow state includes: In response to determining that the electric welder is in a twin-wire welding mode, determining a slave voltage within a first predetermined time after the master enters a pulse rising period; and When the slave voltage continues to rise within the first predetermined time, it is determined that the electric welder is in a magnetic blow state.

6. The method according to claim 5, wherein: The first predetermined time is 100 microseconds.

7. The method according to claim 1, wherein Determining that the electric welder is in a magnetic blow state includes: In response to determining that the electric welder is in the single-wire welding mode, when a base current of a welding pulse is less than 80A, it is determined that the electric welder is in a magnetic blow state.

8. The method according to claim 1, wherein Determining the peak current and peak time of the second pulse includes: When the electric welder is in double-wire welding mode, the peak current of the second pulse is determined as the peak adjustment current, wherein the deviation between the peak adjustment current and the host peak current is less than the second current threshold, and the peak time of the host pulse is determined as the peak time of the second pulse.

9. The method according to claim 8, further comprising: At the end of the peak time of the master pulse, the slave voltage within a second predetermined time before the end time point of the peak time of the master pulse is determined. If the slave voltage is still rising within the second predetermined time, the second pulse continues to be output until the next pulse of the slave starts.

10. The method according to claim 1, wherein Determining the peak time of the second pulse includes: When the electric welder is in single-wire welding mode, the difference between the peak current and the base current of the welding pulse is determined as the peak current of the second pulse, and one third to one half of the base time of the welding pulse is determined as the peak time of the second pulse.

11. The method according to claim 9, wherein The second predetermined time is 100 microseconds.

12. A welding device for controlling abnormal pulse welding voltage, comprising: a working mode determining unit configured to determine a welding working mode of the welding device; a magnetic blow state determining unit configured to determine whether the welding device is in a magnetic blow state according to a welding working mode of the welding device; a second pulse enabling unit configured to enable a second pulse when the welding device is in a magnetic blow state; a peak current determining unit configured to determine a peak current of the second pulse when the second pulse is enabled; a peak time determination unit configured to determine a peak time of the second pulse when the second pulse is enabled; as well as The output unit is configured to output the second pulse according to the peak current of the second pulse and the peak time of the second pulse.

13. The welding device according to claim 12, wherein: The working mode determining unit includes: A synchronization signal sending subunit configured to send a welding synchronization signal to the slave machine; a confirmation signal receiving subunit, configured to receive a confirmation signal from the slave; and The twin-wire welding mode determination subunit is configured to determine that the welding device is in the twin-wire welding mode if the confirmation signal is received, and to determine that the welding device is in the single-wire welding mode if the confirmation signal is not received.

14. The welding device according to claim 12, wherein: The magnetic blow state determining unit includes a current difference determining subunit and a magnetic blow state first determining subunit: In response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, the current difference determination subunit is configured to determine the difference between the master peak current and the slave base current when the master enters a pulse rising period; as well as The magnetic blow state first determining subunit is configured to determine that the welding device is in a magnetic blow state when the difference is less than a first current threshold.

15. The welding device according to claim 12, wherein: The magnetic blow state determining unit includes a first slave voltage determining subunit and a second magnetic blow state determining subunit: In response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, the slave voltage first determination subunit is configured to determine the slave voltage within a first predetermined time period after the master enters a pulse rising period; as well as The second magnetic blow state determining subunit is configured to determine that the welding device is in the magnetic blow state if the slave voltage continues to rise within the first predetermined time.

16. The welding device according to claim 15, wherein: The first predetermined time is 100 microseconds.

17. The welding device according to claim 12, wherein: The magnetic blow state determining unit includes a pulse base current determining subunit and a magnetic blow state third determining subunit; wherein: In response to the working mode determination unit determining that the welding device is in the single-wire welding mode, the pulse base current determination subunit is configured to determine the base current of the welding pulse, and the magnetic blow state third determination subunit is configured to determine that the welding device is in the magnetic blow state when the base current of the welding pulse is less than a third current threshold. The welding device according to claim 17 , wherein the third current threshold is 80 A.

19. The welding device according to claim 12, wherein: The peak current determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, determine the peak current of the second pulse as the peak adjustment current, wherein the deviation between the peak adjustment current and the host peak current is less than a second current threshold.

20. The welding device according to claim 12, wherein The peak time determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the twin-wire welding mode, determine the peak time of the main pulse as the peak time of the second pulse.

21. The welding device according to claim 12, wherein: The peak time determination unit includes: a second slave voltage determining subunit configured to, in response to the working mode determining unit determining that the welding device is in the twin-wire welding mode, determine the slave voltage within a second predetermined time before the end time point of the peak time of the master pulse when the peak time of the master pulse ends; and The peak time determining subunit is configured to determine to output the second pulse until the next pulse of the slave starts if the slave voltage is still rising within the second predetermined time.

22. The welding device according to claim 21, wherein: The second predetermined time is 100 microseconds.

23. The welding device according to claim 12, wherein: The peak current determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the single-wire welding mode, use the difference between the peak current and the base current of the welding pulse as the peak current of the second pulse.

24. The welding device according to claim 12, wherein The peak time determination unit is configured to, in response to the working mode determination unit determining that the welding device is in the single-wire welding mode, use one third to one half of the base time of the welding pulse as the peak time of the second pulse.

25. A non-volatile storage medium having stored thereon a computer program executable by a processor, wherein in response to the processor executing the computer program, the processor is configured to implement the operation of the method for controlling pulse welding voltage abnormality according to any one of claims 1 to 11.

26. A computer program product, comprising a computer program executable by a processor, wherein when the computer program is executed by the processor, the processor is configured to implement the method of controlling pulse welding voltage anomalies according to any one of claims 1 to 11.

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