JP2016196027A - Power unit for welding and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power unit for welding to which a semiautomatic welding module, a gouging module and an air tool can be connected and which can achieve efficiency of operation and reduction in power consumption.SOLUTION: A power unit 1 for welding comprises: an adjustment part 10; output terminal 25, 26; a power supply 23 for confirmation; a voltage detection part 31 which outputs a voltage variation signal; an air discharge port 83, an air detection part 81 which outputs an air detection signal; and a control part 41 which controls the adjustment part 10 in a control mode selected based upon whether the voltage variation signal and air detection signal are present. The control part 41 controls the adjustment part 10 in a control mode matching semiautomatic welding when the air detection signal is absent or in a control mode matching gouging when the voltage variation signal is present even in the of presence of the air detection signal, or controls the adjustment part 10 so that a current is output from neither the output terminals 25, 26 when the voltage variation signal is absent even in the presence of the air detection signal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a welding power supply device and a control method thereof.

  After semi-automatic welding such as MAG (Metal Active Gas) welding is performed on the steel material to be processed, arc air gouging (hereinafter, “ Gouging "). As described above, semi-automatic welding and gouging may be continuously performed at the same place. Therefore, if the welding power supply device can also be used as a gouging power supply device, it is possible to achieve a reduction in the installation space of the power supply. From such a viewpoint, various proposals have been made as welding power supply devices that can also be used as gouging power supply devices (see, for example, Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 55-40020 JP-A-10-109166

  In the structure of the power supply device disclosed in Patent Document 1, it is necessary to select one of the semi-automatic welding mode and the gouging mode by operating a switch installed in the power supply device to switch the operation mode of the power supply device. However, there are many cases where the place of welding or gouging is separated from the power supply device. Therefore, in the structure of the power supply device disclosed in Patent Document 1, when the mode is switched, the operator moves from the construction location to the installation location of the power supply device to switch the mode, and then returns to the construction location to resume the work. Need arises. Therefore, there is a problem that work efficiency is lowered.

  Moreover, in the structure of the power supply device disclosed in Patent Document 2, it is necessary to carry a switching device for switching modes separately from a semi-automatic welding module for performing semi-automatic welding and a gouging module for performing gouging. is there. When the place of welding or gouging and the power supply device are separated from each other, it is necessary to route the switching device cable together with the semi-automatic welding module or gouging module cable, resulting in a problem that work efficiency is lowered.

  In addition, after gouging, there is a case where a process using an air tool, such as an air grinder, an air sander, or an air brush, which is a tool driven by air for the purpose of removing spatter or burrs, may be performed. In such a case, by removing the gouging torch and replacing it with an air tool, the air supplied for gouging can be used to drive the air tool. However, when a gouging torch is simply replaced with an air tool, a problem arises in that unnecessary power is consumed because the power source consumes power even during use of the air tool.

  An object of the present invention is to provide a welding power supply apparatus capable of connecting a semi-automatic welding module, a gouging module, and an air tool, and capable of achieving work efficiency and reduction of power consumption, and a control method thereof. is there.

  The welding power source device according to the present invention can connect a semi-automatic welding module for performing semi-automatic welding, a gouging module for performing gouging, and an air tool which is a tool driven by air. A welding power source device for driving any one of the semi-automatic welding module, the gouging module, and the air tool. The welding power supply device includes an adjustment unit, a pair of output terminals, a confirmation power source, a voltage detection unit, an air discharge port, an air detection unit, and a control unit. The adjustment unit adjusts the value of the output current. The pair of output terminals are terminals that are connected to the adjustment unit and output a current adjusted by the adjustment unit. The confirmation power source is a power source for applying a confirmation voltage between the pair of output terminals. The voltage detection unit measures the voltage between the pair of output terminals, and the voltage between the output terminals has changed to a predetermined range within a predetermined time after the confirmation voltage is applied between the output terminals. In this case, a voltage fluctuation signal is output. The air discharge port discharges air. The air detection unit outputs an air detection signal when air is being discharged from the air discharge port. The control unit is connected to the voltage detection unit, the air detection unit, and the adjustment unit, and controls the adjustment unit in a control mode that is selected based on the presence or absence of the voltage fluctuation signal and the air detection signal.

  The control unit controls the adjustment unit in a control mode suitable for semi-automatic welding when there is no air detection signal, and is suitable for gouging when there is an air detection signal and there is a voltage fluctuation signal. The adjustment unit is controlled in the control mode, and when there is an air detection signal and there is no voltage fluctuation signal, the adjustment unit is controlled so that no current is output from the pair of output terminals.

  In the welding power supply device of the present invention, the control unit controls the adjustment unit in an appropriate control mode selected based on the presence or absence of the voltage fluctuation signal and the air detection signal. Here, when the semi-automatic welding module is used among the semi-automatic welding module, the gouging module, and the air tool, air is not discharged from the air discharge port. Therefore, when there is no air detection signal, the control unit controls the adjustment unit in a control mode suitable for semi-automatic welding. In addition, when a gouging module is used, air is discharged from the air discharge port, and gouging start (touch start) is performed by bringing the gouging module into contact with the workpiece. Is detected. Therefore, when there is an air detection signal and there is a voltage fluctuation signal, the control unit controls the adjustment unit in a control mode suitable for gouging. Further, when an air tool is used, since air is discharged from the air discharge port and the touch start is not performed, voltage fluctuation due to the touch start is not detected. Therefore, when there is an air detection signal and there is no voltage fluctuation signal, the control unit controls the adjustment unit so that no current is output from the pair of output terminals.

  Thus, in the welding power supply device of the present invention, the welding power supply device can be operated in an appropriate mode without separately providing a mode switching switch or the like. Therefore, it is not necessary for the operator to move from the construction site to the installation site of the power supply device to switch the mode or perform the operation of routing the cable for the switching device. As a result, work efficiency can be improved. In addition, during use of the air tool, the control unit controls the adjustment unit so that no current is output from the pair of output terminals. Therefore, unnecessary power consumption is suppressed during use of the air tool, and reduction of power consumption is achieved. As described above, according to the welding power supply apparatus of the present invention, a welding power supply that can connect a semi-automatic welding module, a gouging module, and an air tool, and that can achieve work efficiency and power consumption reduction. An apparatus can be provided.

  The control method of the welding power source device according to the present invention can connect a semi-automatic welding module for performing semi-automatic welding, a gouging module for performing gouging, and an air tool which is a tool driven by air. The control method of the welding power supply device for driving any one of the connected semi-automatic welding module, gouging module, and air tool. The method for controlling the welding power source device includes a step of confirming whether air is being discharged from the air discharge port, and outputting an air detection signal when air is being discharged from the air discharge port; The step of applying a confirmation voltage between the output terminals based on the above, and the voltage between the output terminals changes to a predetermined range within a predetermined time after the confirmation voltage is applied between the output terminals. A step of outputting a voltage fluctuation signal when the voltage between the output terminals changes to a predetermined range, and a control mode is selected based on the presence or absence of the air detection signal and the voltage fluctuation signal. Steps. Then, in the step of selecting the control mode, when there is no air detection signal, the semi-automatic welding mode for controlling the adjustment unit in the control mode suitable for semi-automatic welding is selected. When there is a signal, select the gouging mode that controls the adjustment unit in the control mode suitable for gouging, and when there is an air detection signal and there is no voltage fluctuation signal, no current is output from the output terminal The air tool mode for controlling the adjusting unit is selected.

  In the control method for the welding power supply apparatus of the present invention, an appropriate control mode is selected based on the presence or absence of the voltage fluctuation signal and the air detection signal. Therefore, the welding power supply apparatus can be operated in an appropriate mode without separately providing a mode switching switch or the like. Therefore, it is not necessary for the operator to move from the construction site to the installation site of the power supply device to switch the mode or perform the operation of routing the cable for the switching device. As a result, work efficiency can be improved. Further, during use of the air tool, the adjustment unit is controlled so that no current is output from the pair of output terminals. Therefore, unnecessary power consumption is suppressed during use of the air tool, and reduction of power consumption is achieved. As described above, according to the method for controlling a welding power supply apparatus of the present invention, efficiency and reduction of power consumption in work using a welding power supply apparatus to which a semi-automatic welding module, a gouging module, and an air tool can be connected are achieved. Can be achieved.

  The method for controlling the welding power supply apparatus includes a step of storing a mode memory that is a memory of the air tool mode being selected when the air tool mode is selected in the step of selecting the control mode, and semi-automatic welding is performed. If the mode memory is erased and the power is turned off, the mode memory is checked after the step of erasing the mode memory and the step of outputting the air detection signal and before the step of applying the confirmation voltage. And a step of confirming. In the step of selecting the control mode, the air tool mode may be selected without applying a confirmation voltage when there is an air detection signal and there is a mode memory.

  Usually, the work proceeds in the order of semi-automatic welding, gouging and processing using an air tool. For this reason, gouging is hardly performed on the same portion of the workpiece after the work using the air tool is performed. Once the air tool mode is selected, apply the confirmation voltage except when the semi-automatic welding is performed and the mode memory is erased, or when the power memory is turned off and the mode memory is erased. By immediately selecting the air tool mode, unnecessary application of the confirmation voltage can be omitted, and the power consumption can be further reduced.

  According to the welding power supply device and the control method thereof of the present invention, a welding power supply device that can connect a semi-automatic welding module, a gouging module, and an air tool, and that can achieve work efficiency and power consumption reduction. And a control method thereof.

It is the schematic which shows the state by which the semiautomatic welding module was connected to the power supply device for welding in Embodiment 1. FIG. It is the schematic which shows the state by which the gouging module was connected to the power supply device for welding in Embodiment 1. FIG. It is the schematic which shows the state by which the air tool was connected to the power supply apparatus for welding in Embodiment 1. FIG. 3 is a flowchart showing an outline of a control method for the welding power supply device in the first embodiment. 6 is a flowchart showing an outline of a control method for a welding power supply device according to a second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
First, the structure of the welding power supply apparatus according to Embodiment 1 will be described. Referring to FIG. 1, welding power supply apparatus 1 according to Embodiment 1 performs semi-automatic welding module for performing semi-automatic welding on a base material 90 (for example, steel material) that is an object to be processed, and for performing gouging. And a pneumatic tool for machining the surface of the base material 90 can be connected, and any one of the connected semi-automatic welding module, the gouging module, and the pneumatic tool can be driven. It has a structure. The welding power supply device 1 includes an adjustment unit 10, a plus output terminal 25, a minus output terminal 26, a touch power supply 23 as a confirmation power supply, a voltage detection unit 31, an air discharge port 83, and air detection. A flow switch 81 serving as a control unit, and a control circuit (CC) 41 serving as a control unit. The welding power supply apparatus 1 further includes a current transformer 21, a direct current reactor (DCL) 22, a switch 24, an alternating current power input terminal 43, and an air inlet 82.

  A three-phase AC power source 51 (commercial power source) is connected to the AC power source input terminal 43. A base material 90 is connected to the negative output terminal 26 via a wiring 91. An air connection portion 87 is connected to the air discharge port 83 via a connection hose 86. An output connecting portion 27 is connected to the plus side output terminal 25 via a cable 28.

  The adjustment unit 10 includes a primary side rectifier circuit 11, an inverter 12, a transformer 13, and a secondary side rectifier circuit 14. The primary side rectifier circuit 11 converts an alternating current output from the three-phase alternating current power supply 51 into a direct current. The inverter 12 includes a plurality of power transistors, converts a direct current into an alternating current, and adjusts the current value. The transformer 13 steps down the alternating voltage to an appropriate voltage. The secondary rectifier circuit 14 converts an alternating current into a direct current. Thereby, the adjustment part 10 adjusts the value of the output electric current.

  The adjustment unit 10 and the plus side output terminal 25 are connected by a wiring 15. The adjustment unit 10 and the negative output terminal 26 are connected by a wiring 16. The current adjusted by the adjustment unit 10 is output from the plus-side output terminal 25 and the minus-side output terminal 26 which are a pair of output terminals. A current transformer 21 is installed in the wiring 15. The current transformer 21 is connected to the control circuit 41. Then, information on the value of the current flowing through the wiring 15 is input from the current transformer 21 to the control circuit 41. A DC reactor 22 is installed in the wiring 16. The output current is smoothed by the DC reactor 22.

  The touch power supply 23 is connected to the wiring 15 and the wiring 16. A switch 24 is installed on the wiring connecting the touch power supply 23 and the wiring 15. By turning on the switch 24, a confirmation voltage is applied between the plus side output terminal 25 and the minus side output terminal 26.

  The voltage detection unit 31 is connected to the wiring 15 and the wiring 16 and measures the voltage between the positive output terminal 25 and the negative output terminal 26. The voltage detection unit 31 is further connected to the control circuit 41. The voltage detection unit 31 measures the voltage between the plus side output terminal 25 and the minus side output terminal 26, and after the confirmation voltage is applied between the plus side output terminal 25 and the minus side output terminal 26. A voltage fluctuation signal is output when the voltage between the output terminals 25 and 26 changes within a predetermined range within a predetermined time. When the voltage fluctuation signal is output from the voltage detection unit 31, the voltage fluctuation signal is input to the control circuit 41.

  The air inlet 82 is connected to an air supply source such as an air compressor (not shown). The air inflow port 82 and the air discharge port 83 are connected by an air flow path 84. A flow switch 81 is installed in the air flow path 84. The flow switch 81 is connected to the control circuit 41. The flow switch 81 outputs an air detection signal when air is being discharged from the air discharge port 83. When an air detection signal is output from the flow switch 81, the air detection signal is input to the control circuit 41.

  The control circuit 41 is connected to the inverter 12 of the adjustment unit 10. The control circuit 41 controls the inverter 12 of the adjustment unit 10 in a control mode selected based on the presence / absence of the voltage fluctuation signal and the air detection signal.

  Next, the operation (control method) of the welding power supply device 1 in the present embodiment will be described. First, the case where the semi-automatic welding module 60 is connected to the output connecting portion 27 will be described with reference to FIGS. 1 and 4. Referring to FIG. 1, a semi-automatic welding module 60 includes a torch 62 and a wire feeder 61 that feeds a welding wire 65 that is a filler material to the torch 62. The semi-automatic welding module 60 and the output connecting portion 27 are connected by a power cable 63. When the main power source (not shown) of the welding power source device 1 is turned on, AC power can be supplied from the three-phase AC power source 51. At this time, the semi-automatic welding module 60 is not connected to the air connecting portion 87. Referring to FIG. 4, when it is confirmed whether or not air is being discharged from air discharge port 83 in such a state (S10), the discharge of air is not confirmed. Therefore, flow switch 81 does not output an air detection signal (NO in S10). Then, the control circuit 41 selects the semi-automatic welding mode based on the absence of the air detection signal (S20). Specifically, the input to the welding power supply device 1 from a torch switch (not shown) of the semi-automatic welding module 60 is enabled, and the control circuit 41 adjusts the control unit in a control mode suitable for semi-automatic welding. 10 inverters 12 are controlled. Then, for example, when the operator operates the torch switch, semi-automatic welding is started.

  Next, the case where the gouging module 70 is connected to the output connecting portion 27 will be described with reference to FIGS. 2 and 4. Referring to FIG. 2, the gouging module 70 is provided with an open / close valve 72 for adjusting the amount of air discharged. In addition, the gouging module 70 is also connected to the air connecting portion 87 via the connection hose 85 in order to enable supply of air to the gouging module 70. When performing gouging, the opening / closing valve 72 is opened. Then, the flow switch 81 is turned on. Referring to FIG. 4, when it is confirmed whether or not air is discharged from air discharge port 83 in such a state (S10), an air detection signal is output from flow switch 81, and air discharge is confirmed. (YES in S10). The air detection signal is input to the control circuit 41.

  When the discharge of air is confirmed and an air detection signal is output, the touch power supply is turned on, and a confirmation voltage is applied between the plus side output terminal 25 and the minus side output terminal 26 (S30). . Specifically, when the switch 24 is turned on, a confirmation voltage is applied between the plus-side output terminal 25 and the minus-side output terminal 26. Whether or not the voltage between the positive output terminal 25 and the negative output terminal 26 has changed to a predetermined range within a predetermined time after the confirmation voltage is applied, for example, within 60 seconds. For example, whether or not the voltage has been reduced to 5% or less of the confirmation voltage is confirmed by the voltage detection unit 31. When gouging is performed, after opening the opening / closing valve 72, touch start is subsequently performed. As a result, the voltage between the plus side output terminal 25 and the minus side output terminal 26 becomes zero. Therefore, voltage detector 31 outputs a voltage fluctuation signal, and a touch is detected (YES in S40). The voltage fluctuation signal is input to the control circuit 41.

  Then, the control circuit 41 selects the gouging mode based on the presence of the air detection signal and the presence of the voltage fluctuation signal (S50). Specifically, the input from the torch switch of the semi-automatic welding module is disabled, and the control circuit 41 controls the inverter 12 of the adjustment unit 10 in a control mode suitable for gouging.

  Next, the case where the air tool 89 is connected to the output connecting portion 27 will be described with reference to FIGS. 3 and 4. Referring to FIG. 3, in order to supply driving air to air tool 89, air tool 89 is connected to air connecting portion 87 via connection hose 88. The air tool 89 is not connected to the output connecting portion 27. When driving of the air tool 89 is started, the flow switch 81 is turned on. Referring to FIG. 4, when it is confirmed whether or not air is being discharged from air discharge port 83 in such a state (S10), an air detection signal is output from flow switch 81, and air discharge is confirmed. (YES in S10). The air detection signal is input to the control circuit 41.

  When the discharge of air is confirmed and the flow switch 81 is output, the touch power supply is turned on, and a confirmation voltage is applied between the plus side output terminal 25 and the minus side output terminal 26 (S30). . As in the case where the gouging module 70 is connected, the voltage between the plus side output terminal 25 and the minus side output terminal 26 is preset at a predetermined time after the confirmation voltage is applied. It is confirmed by the voltage detector 31 whether or not the range has been changed. When the air tool 89 is driven, the voltage between the plus side output terminal 25 and the minus side output terminal 26 does not fluctuate. Therefore, voltage detection unit 31 does not output a voltage fluctuation signal and no touch is detected (NO in S40).

  Then, the control circuit 41 selects the air tool mode based on the presence of the air detection signal and the absence of the voltage fluctuation signal (S60). Specifically, the application of the confirmation voltage is stopped, the operation of the inverter 12 is stopped, and the cooling fan of the welding power source 1 is stopped. As a result, no current is output from the plus side output terminal 25 and the minus side output terminal 26.

  Here, in welding power supply apparatus 1 of the present embodiment, a control mode is selected based on the presence or absence of an air detection signal and a voltage fluctuation signal, and control circuit 41 controls adjustment unit 10 in accordance with the selected control mode. . Therefore, the welding power supply device 1 can be operated in an appropriate mode without separately providing a mode switching switch or the like. Therefore, it is not necessary for the operator to move from the construction site to the installation site of the power supply device to switch the mode or perform the operation of routing the cable for the switching device. As a result, work efficiency can be improved. Further, during use of the air tool 89, the control circuit 41 controls the adjustment unit 10 so that no current is output from the plus side output terminal 25 and the minus side output terminal 26. Therefore, unnecessary power consumption during use of the air tool 89 is suppressed, and a reduction in power consumption is achieved. As described above, the welding power supply device 1 of the present embodiment can connect the semi-automatic welding module 60, the gouging module 70, and the air tool 89, and can achieve work efficiency and power consumption reduction. Power supply for welding. Further, by controlling the welding power supply device 1 according to the procedure in the above embodiment, the efficiency in the work using the welding power supply device 1 to which the semi-automatic welding module 60, the gouging module 70, and the air tool 89 can be connected is improved. Reduction of power consumption can be achieved.

(Embodiment 2)
Next, a control method for the welding power source apparatus according to Embodiment 2, which is another embodiment of the present invention, will be described. FIG. 5 is a flowchart showing an outline of a control method for the welding power source apparatus according to the second embodiment. Referring to FIGS. 5 and 4, the control method of welding power supply device 1 in the second embodiment is basically performed in the same manner as in the first embodiment, and has the same effects. However, the control method of the welding power source apparatus 1 of the second embodiment is different from that of the first embodiment in the following points.

  Referring to FIG. 5, in the control method for welding power supply device 1 according to the second embodiment, when the air tool mode is selected (S60), it is stored that the air tool mode is selected (S70; Air tool mode memory). In the present embodiment, the mode memory is stored in a volatile memory installed in welding power supply device 1. The memory of the mode is then erased when the semi-automatic welding mode is selected (S20) and semi-automatic welding is performed (YES in S80) (S90). Since the mode memory is stored in the volatile memory, it is also erased when the main power is turned off.

  If air discharge from the air discharge port 83 is confirmed and an air detection signal is output (YES in S10), before the step of applying a confirmation voltage (S30), the non-volatile memory is stored in the nonvolatile memory. It is confirmed whether or not the air tool mode is stored (S100). If there is a memory of the air tool mode (YES in S100), the air tool mode is selected without applying a confirmation voltage (S60). On the other hand, when the air tool mode is not stored (NO in S100), step (S30) is performed in the same manner as in the first embodiment.

  Usually, the work proceeds in the order of semi-automatic welding, gouging and processing using the air tool 89. Therefore, after the work using the air tool 89 is performed, gouging is hardly performed on the same portion of the base material 90. Once the air tool mode is selected, apply the confirmation voltage except when the semi-automatic welding is performed and the mode memory is erased, or when the power memory is turned off and the mode memory is erased. By immediately selecting the air tool mode, unnecessary application of the confirmation voltage can be omitted, and the power consumption can be further reduced.

  In the above-described embodiment, the case where the flow switch 81 is employed as the air detection unit has been described. However, a device that can be employed as the air detection unit is not limited thereto, and may be a pressure sensor, for example. When the opening / closing valve 72 of the gouging module 70 is opened, the pressure in the air flow path 84 decreases. Therefore, it is possible to output the air detection signal from the pressure sensor by sensing this pressure drop.

  Moreover, although the said embodiment demonstrated the structure which replaces and connects the semiautomatic welding module 60 and the gouging module 70 to the output connection part 27 connected to the plus side output terminal 25, the power supply apparatus for welding of this invention However, the present invention is not limited to this. For example, a configuration may be employed in which output terminals corresponding to the semi-automatic welding module 60 and the gouging module 70 are provided and the output terminals are switched in accordance with the switching of the control mode. In this case, the output terminal can be switched by, for example, a magnet switch or a switching element.

  In the above-described embodiment, the configuration in which the semi-automatic welding module 60 and the gouging module 70 are replaced and connected to the output connecting portion 27 connected to the plus-side output terminal 25 has been described. However, the plus-side output terminal 25 is semi-automatically connected. Both the welding module 60 and the gouging module 70 may be connected. Even in this case, as described above, by selecting an appropriate control mode based on the presence or absence of the voltage fluctuation signal and the air detection signal, it is possible to supply an appropriate output in accordance with the module to be driven.

  It should be understood that the embodiments disclosed herein are illustrative in all respects and are not restrictive in any aspect. The scope of the present invention is defined by the scope of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the scope of the claims.

  The welding power supply apparatus and the control method thereof according to the present invention are a welding power supply apparatus that can be connected to a semi-automatic welding module, a gouging module, and an air tool, and that is required to improve work efficiency and reduce power consumption. The method can be applied particularly advantageously.

  DESCRIPTION OF SYMBOLS 1 Power supply device for welding, 10 Adjustment part, 11 Primary side rectifier circuit, 12 Inverter, 13 Transformer, 14 Secondary side rectifier circuit, 15, 16 Wiring, 21 Current transformer, 22 DC reactor, 23 Touch power supply, 24 Switch 25 Positive output terminal, 26 Negative output terminal, 27 Output connection part, 28 Cable, 31 Voltage detection part, 41 Control circuit, 43 AC power supply input terminal, 51 Three-phase AC power supply, 60 Semi-automatic welding module, 61 wire Feeder, 62 Torch, 63 Power cable, 65 Welding wire, 70 Gouging module, 72 Open / close valve, 81 Flow switch, 82 Air inlet, 83 Air outlet, 84 Air flow path, 85 Connection hose, 86 Connection hose, 87 Air Connecting part, 88 connection hose, 89 air tool, 90 base material, 1 wiring.

Claims (3)

A semi-automatic welding module for performing semi-automatic welding, a gouging module for performing gouging, and an air tool which is a tool driven by air can be connected, the semi-automatic welding module connected, the gouging module, And a welding power supply device for driving any one of the air tools,
An adjustment unit for adjusting the value of the output current;
A pair of output terminals connected to the adjustment unit and for outputting a current adjusted by the adjustment unit;
A confirmation power source for applying a confirmation voltage between the pair of output terminals;
When the voltage between the pair of output terminals is measured, and the voltage between the output terminals changes to a predetermined range within a predetermined time after the confirmation voltage is applied between the output terminals. A voltage detector that outputs a voltage fluctuation signal;
An air outlet for discharging air;
An air detection unit that outputs an air detection signal when air is discharged from the air discharge port;
A control unit connected to the voltage detection unit, the air detection unit, and the adjustment unit, and controlling the adjustment unit according to a control mode selected based on presence or absence of the voltage fluctuation signal and the air detection signal;
The control unit controls the adjusting unit in a control mode suitable for semi-automatic welding when there is no air detection signal, and when there is the air detection signal and there is the voltage fluctuation signal, gouging is performed. The adjustment unit is controlled in a control mode suitable for the control, and when there is the air detection signal and there is no voltage fluctuation signal, the adjustment unit is controlled so that no current is output from the pair of output terminals. A welding power supply. A semi-automatic welding module for performing semi-automatic welding, a gouging module for performing gouging, and an air tool which is a tool driven by air can be connected, the semi-automatic welding module connected, the gouging module, And a control method of a welding power source device for driving any one of the air tools,
Checking whether air is being discharged from the air discharge port, and outputting air detection signal when air is being discharged from the air discharge port;
Applying a confirmation voltage between the output terminals based on the air detection signal;
It is confirmed whether the voltage between the output terminals has changed to a predetermined range within a predetermined time after the confirmation voltage is applied between the output terminals, and the voltage between the output terminals is Outputting a voltage fluctuation signal when it changes to a predetermined range;
Selecting a control mode based on the presence or absence of the air detection signal and the voltage fluctuation signal,
In the step of selecting the control mode, when there is no air detection signal, a semi-automatic welding mode for controlling the adjustment unit is selected in a control mode suitable for semi-automatic welding, and the air detection signal is present. When the voltage fluctuation signal is present, a gouging mode for controlling the adjusting unit is selected in a control mode suitable for gouging, and when the air detection signal is present and the voltage fluctuation signal is absent, the output is selected. A control method for a welding power source apparatus, wherein an air tool mode for controlling the adjusting unit is selected so that no current is output from a terminal. Storing a mode memory that is a memory of the air tool mode being selected when the air tool mode is selected in the step of selecting the control mode;
Erasing the mode memory when semi-automatic welding is performed and when the power is turned off;
After the step of outputting the air detection signal and before the step of applying the voltage for confirmation, further comprising the step of confirming the presence or absence of the mode storage,
In the step of selecting the control mode, if the air detection signal is present and the mode is stored, the air tool mode is selected without applying the confirmation voltage. The control method of the welding power supply device of description.

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