JP2003191075A - Consumable electrode type arc welding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a workability is poor and a control cables are likely to cause disconnection because bundled and integrated control wires must be moved together with a wire feeding equipment which is separated from a welding power supply, when transported. <P>SOLUTION: The consumable electrode type arc welding equipment is a type in which an output control power supply PS for a standby welding period is provided in a welding power supply WER2, a control power supply SP incorporating a feeding device which inputs a control voltage from a power cable is provided in a wire feeding device WSR2, a spectrum expansion communication part which transmits and receives a control signal by a spectrum diffusion communication method between the wire feeding device WSR2 and the welding power supply WER2 via a power cable. The control voltage, which the control power supply SP incorporating a feeding device inputs, is supplied from the output control power supply PS for a standby welding period during a welding standby period, supplied from an arc voltage during a welding period, and supplied from a no-load voltage of the welding power supply WER2 during a period of a no-load voltage output. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is separated into a welding power source equipped with a welding power source output circuit for outputting welding power and a wire feeding device carried by a welding operator when the welding position is moved. Consumable electrode type arc welding equipment.

[0002]

2. Description of the Related Art FIG. 2 is a connection diagram of a conventional consumable electrode type arc welding apparatus. Consumable electrode type arc welding equipment
Usually, it is separated into a welding power source WER which is not moved due to its weight and a wire feeding device WSR which is carried by a welding operator as the welding position moves. This welding power source W
The welding power supply output circuit WP, the control power supply assembly MS, the output control circuit, and the like, which will be described later, are built in the ER. Further, the remote control device REM incorporates a welding current setting device WI and a welding voltage setting device WV. Further, the wire feeding device WSR includes a feeding motor M and a solenoid valve SO, which will be described later.
L, etc. are built in. In this solenoid valve SOL, the consumable electrode type arc welding method is CO2 welding, MIG welding, or MAG.
For gas shield consumable electrode type arc welding such as welding,
The flow path of the shield gas ejected from the welding torch TH is opened and closed.

In the figure, the welding power source output circuit WP is
A circuit for outputting electric power for welding, which is a primary rectification circuit DR
1, an inverter circuit INV, a main transformer INT, a secondary rectifier circuit DR2, a DC reactor DL and the like. The primary rectifier circuit DR1 rectifies the output of the three-phase AC commercial power supply AC and converts it into DC power. Inverter circuit INV
Is a high-frequency AC pulse voltage that is converted to DC by the primary rectifier circuit DR1, and the main transformer INT converts the output of the inverter circuit INV into a high-frequency AC pulse voltage suitable for arc machining, and performs secondary rectification. The circuit DR2 rectifies the output of the main transformer and converts it into DC power. The converted DC power is supplied to the consumable electrode 2 and the work piece 1 through the first power cable 4 and the second power cable 5 through the DC reactor DL.

An output control unit (not shown) is an output control circuit S.
C, welding voltage setter WV, crater voltage setter CV, output voltage detection circuit VD, output current detection circuit ID, and inverter drive circuit IR. The output voltage detection circuit VD detects the voltage between the output terminals, and the output current detection circuit ID detects the output current.

The first power cable 4 and the second power cable 5 are provided between the control power supply assembly MS of the welding power supply WER (using the conventional control cable) and the output control circuit SC and the wire feeding device WSR. In addition, a plurality of control lines including a start signal control line 6 (two-core cable for torch switch), a motor control line 7, a solenoid valve control line 8 and a GND line 9 are connected. Further, a power supply line 1 for remote control is provided between the output control circuit SC and the remote control device REM.
1, a welding current setting control line 12, a welding voltage setting control line 13, a remote control GND line 14 and an inching control line 15. These control lines are bundled and integrated, or a control cable 10 and a remote control device control cable 16 formed of a plurality of cores are used. Therefore, when the welding operator carries the wire feeding device WSR along with the movement of the welding position, the control cable 10 and the control cable 16 for the remote control device, which are composed of the bundled and integrated control wires or plural core wires, are also included. Have moved to.

The output control circuit SC starts its operation in response to the torch switch activation signal Ts, and sets the welding current setting signal Wi and the welding voltage setting signal Wi having a predetermined value set by the welding current setting device WI incorporated in the remote controller REM. Welding voltage setting signal Wv set by controller WV, predetermined crater current setting signal Ci set by crater current setting device CI built in welding power source WER, predetermined by crater voltage setting device CV Calculation processing is performed according to the values of the crater voltage setting signal Cv, the output voltage detection signal Vd, and the output current detection signal Id to output the output control signal Sc, and at the same time, the feed motor control signal Sa and the solenoid valve with a built-in welding power source. The open / close signal S1 is output.

The control power supply assembly MS is formed by a supply auxiliary transformer TO during power-on, an auxiliary power supply rectification circuit DR3, a solenoid valve opening / closing switch SW1 and a feed motor control circuit GA.

The power-supplying auxiliary transformer TO converts the three-phase AC commercial power AC into a voltage suitable for the drive voltage of the feed motor and the operating voltage of the solenoid valve, and the auxiliary power rectifier circuit DR3.
Rectifies the output of the auxiliary power transformer TO during power-on and converts it into DC power. While the solenoid valve opening / closing signal S1 for opening / closing the solenoid valve opening / closing switch SW1 is at a high level, the line of the solenoid valve opening / closing switch SW1 is turned on (the solenoid valve opening / closing switch SW1 is turned on) to make the flow path of the solenoid valve SOL. Is formed (the solenoid valve SOL is turned on). The feed motor control circuit GA controls the rotation speed of the feed motor M according to the value of the feed motor control signal Sa.

Wire feeder WS for motor control circuit exterior
R is formed by a feed motor M, a solenoid valve SOL, and a feed roll 3.

FIG. 3 is a timing chart for explaining the operation of the conventional consumable electrode type arc welding apparatus shown in FIG. 2. The operation of the conventional art shown in FIG. 2 will be described with reference to the timing chart of FIG. FIG. 3A shows the output voltage detection signal V
3B shows the output current detection signal Id. 3C shows the torch switch activation signal Ts output from the torch switch TS, FIG. 3D shows the feed motor control signal Sa output from the output control circuit SC, and FIG. , A welding power source built-in solenoid valve opening / closing signal S1 output from the output control circuit SC.

From the torch switch TS shown in FIG.
The torch switch activation signal Ts shown in (C) is at time t = t.
2, the output control circuit SC outputs the values of the welding current setting signal Wi, the crater current setting signal Ci, the welding voltage setting signal Wv and the crater voltage setting signal Cv, and the output current detection signal Id and the output voltage. The calculation processing is performed according to the value of the detection signal Vd, and the output control signal Sc, the solenoid valve opening / closing signal S1 with a built-in welding power source, and the feed motor control signal Sa are output.

At time t = t2 shown in FIG. 3D,
When the feed motor control signal Sa is input to the feed motor control circuit GA, the feed motor control circuit GA controls the rotation of the feed motor M according to the value of the input signal.

At time t = t2 shown in FIG. 3 (E),
A solenoid valve opening / closing signal S1 with a built-in welding power source is input to the solenoid valve SOL to open / close the solenoid valve.

T2 shown in FIG. 3 (B) indicates a no-load voltage output period, in which the consumable electrode 2 is fed at a feeding speed of a predetermined value, and at time t = t3, the consumable electrode 2 and the consumable electrode 2 are fed. At the same time when the workpiece 1 comes into contact with the workpiece 1, an arc start current flows to generate an arc, and during the welding period T3, a "short circuit transition" is performed in which the short circuit and the arc are repeated.

At time t = t4 shown in FIG. 3 (D),
When the torch switch activation signal Ts becomes Low level, the rotation speed of the feed motor M is decelerated and the output of the inverter circuit is stopped after the antistick period T4 of a predetermined value. In addition, the afterflow period T5 of a predetermined value
After that, the line of the solenoid valve opening / closing switch SW1 is cut off (the solenoid valve opening / closing switch SW1 is turned off), and the line of the solenoid valve SOL is cut off (the solenoid valve SOL is turned off).

[0016]

As shown in FIG. 2 of the prior art, the consumable electrode type arc welding apparatus is used by the welding operator in connection with the welding power source WER which is not moved due to its weight and the welding position is moved. Portable wire feeder WSR
It is separated into and. Therefore, when the welding operator carries the wire feeding device WSR with the movement of the welding position, the control cable composed of the bundled and integrated control wires or multiple core wires must be moved together, Workability is very poor, and in order to reduce the number of control lines,
A composite cable system in which a power cable, a control line, and a gas hose are combined into one, and a composite girth system in which a control line is passed through the gas hose have been put into practical use, but these have a special structure and the control line is broken. Sometimes it was difficult to repair. Further, in order to increase the number of control signals between the welding power source WER and the remote control device REM, the number of control cables also increases, so that the remote control device REM can be provided with only the minimum necessary functions.

[0017]

According to the invention of the apparatus of claim 1 at the time of filing, a welding worker can move along with a welding power source WER2 equipped with a welding power source output circuit WP for outputting welding power and a welding position. In a consumable electrode type arc welding apparatus which is separated from a wire feeding apparatus WSR2 to be carried around, a welding power source WER2 supplies a control voltage for controlling a feeding motor M and a solenoid valve SOL to a first power cable 4 during welding standby.
And a second power cable 5 or a ground wire, which is provided with a welding standby output control power supply PS and is supplied to the wire feeding device WSR2 from the first power cable 4 and the second power cable 5 or the ground wire. When the control power supply SP with a built-in feeding device for inputting the control voltage and the output voltage of the control power supply SP with a built-in feeding device and the torch switch activation signal Ts are input, the feed motor control signal Sa and the solenoid valve drive Second central processing circuit CPU that outputs signal S2
2, a feeding motor control circuit GA which receives the feeding motor control circuit supply voltage Sk of the feeding device built-in control power supply SP and a feeding motor control signal Sa, and an electromagnetic wave of the feeding device built-in control power supply SP. Solenoid valve drive circuit SW and solenoid valve S to which the supply voltage So for valve ON and the solenoid valve drive signal S2 are input
OL, welding power source WER2 and wire feeding device WSR
2 is a consumable electrode type arc welding apparatus provided with a spread spectrum communication unit that transmits and receives each control signal to and from 2 via a first power cable 4 in a spread spectrum communication system.

The invention of the apparatus of claim 2 at the time of application is the welding power source W provided with the welding power source output circuit WP for outputting the welding power.
In the consumable electrode type arc welding device separated from the ER2 and the wire feeding device WSR2 carried by the welding operator as the welding position moves, the welding power source WER2
And a welding standby output control power supply PS for supplying the control voltage for controlling the feed motor M and the solenoid valve SOL to the first power cable 4 and the second power cable 5 or the ground wire during the welding standby. , The wire feeder WSR2,
The power supply device built-in control power supply SP for inputting the control voltage from the first power cable 4 and the second power cable 5 or the ground wire is provided, and (1) the welding power supply WER2 is the first
Spreader signal coupling circuit TR for transmitting and receiving a spread spectrum modulated signal by a spread spectrum communication system by being coupled to the power cable 4 of
A despread demodulation circuit SD for despreading the received spread-modulation received signal Tr for demodulation, and a demodulated despread demodulated signal S.
a primary modulation wave demodulation circuit DE for demodulating d into a signal corresponding to the central processing circuit CPU, and a signal modulation circuit MO for primary modulating the welding current detection / welding monitoring signal Cr output from the central processing circuit CPU, Spreading modulation circuit SI that spreads the spectrum of primary modulated wave signal Mo, and welding power source startup by calculating according to the value of welding power source startup / output voltage setting reception signal De demodulated by primary modulation wave demodulation circuit DE A central processing unit CPU that separates and outputs a signal Ct and an output voltage setting signal Cp, and starts operation when the welding power source start signal Ct is input, and outputs an output voltage setting signal Cp, an output voltage detection signal Vd, and And an output control circuit SC2 for controlling the output of the welding power supply output circuit WP by performing arithmetic processing according to the value of the output current detection signal Id. (2) The wire feeding device WSR2 , When the torch switch activation signal Ts is input, the solenoid valve drive signal S2 is output, and according to the welding current setting signal Wi output by the welding current setting device WI and the crater current setting signal Ci output by the crater current setting device CI. The feed motor control signal Sa is output, and the welding power supply start / output voltage setting transmission is performed according to the welding voltage setting signal Wv output by the welding voltage setting device WV and the crater voltage setting signal Cv output by the crater voltage setting device CV. A second central processing circuit CPU2 that outputs a signal Ck and a second central processing unit that secondly modulates the welding power source start-up / output voltage setting transmission signal Ck
Signal modulation circuit MO2 and second primary modulated wave signal Mo2
A second spread spectrum modulation circuit SI2 for spread spectrum, a second spread spectrum signal combination circuit TR2 for transmitting and receiving a spread spectrum modulated signal by the spread spectrum communication system by being coupled to the first power cable 4, and the received second spread spectrum A second despread demodulation circuit SD2 for despreading the modulated reception signal Tr2 to demodulate;
A second primary modulation wave demodulation circuit DE2 for demodulating the demodulated second despread demodulation signal Sd2 into a signal corresponding to the second central processing circuit CPU2, and the feed motor control signal Sa.
To feed motor control circuit GA for driving feed motor M, and solenoid valve drive signal S2 to input solenoid valve SOL.
And a solenoid valve drive circuit SW for turning on and off, the control voltage input by the control power supply SP with a built-in feeding device is the output control power supply PS during welding standby during the welding standby period (T6 and T7 in FIG. 5). Supplied from the arc voltage during the welding period and the anti-stic period (T3 and T4 in FIG. 5), and from the no-load voltage of the welding power source WER2 during the no-load voltage output period (T2 in FIG. 5). It is a consumable electrode type arc welding device.

The invention of the apparatus of claim 3 at the time of application is the welding power source W provided with the welding power source output circuit WP for outputting the welding power.
In the consumable electrode type arc welding device separated from the ER2 and the wire feeding device WSR2 carried by the welding operator as the welding position moves, the welding power source WER2
And a welding standby output control power supply PS for supplying the control voltage for controlling the feed motor M and the solenoid valve SOL to the first power cable 4 and the second power cable 5 or the ground wire during the welding standby. , The wire feeder WSR2,
The power supply device built-in control power supply SP for inputting the control voltage from the first power cable 4 and the second power cable 5 or the ground wire is provided, and (1) the welding power supply WER2 is the first
Spreader signal coupling circuit TR for transmitting and receiving a spread spectrum modulated signal by a spread spectrum communication system by being coupled to the power cable 4 of
A despread demodulation circuit SD for despreading the received spread-modulation received signal Tr for demodulation, and a demodulated despread demodulated signal S.
a primary modulation wave demodulation circuit DE for demodulating d into a signal corresponding to the central processing circuit CPU, and a signal modulation circuit MO for primary modulating the welding current detection / welding monitoring signal Cr output from the central processing circuit CPU, Spreading modulation circuit SI that spreads the spectrum of primary modulated wave signal Mo, and welding power source startup by calculating according to the value of welding power source startup / output voltage setting reception signal De demodulated by primary modulation wave demodulation circuit DE A central processing unit CPU that separates and outputs a signal Ct and an output voltage setting signal Cp, and starts operation when the welding power source start signal Ct is input, and outputs an output voltage setting signal Cp, an output voltage detection signal Vd, and And an output control circuit SC2 for controlling the output of the welding power supply output circuit WP by performing arithmetic processing according to the value of the output current detection signal Id. (2) The wire feeding device WSR2 When the torch switch activation signal Ts is input by using the second central processing circuit supply voltage Sp supplied by the feeding device built-in control power supply SP as a power supply, the solenoid valve drive signal S2 is output, and the welding current setting device. Welding current setting signal Wi output from WI and crater current setting device CI
The feed motor control signal Sa is output according to the crater current setting signal Ci output by the crater current setting signal Ci, and the welding voltage setting signal Wv output by the welding voltage setting device WV and the crater voltage setting signal Cv output by the crater voltage setting device CV are output. And a second central processing unit CPU2 that outputs a welding power supply start-up / output voltage setting transmission signal Ck, and a second signal modulation circuit MO2 that primarily modulates the welding power supply start-up / output voltage setting transmission signal Ck. And a second spread spectrum modulation circuit SI2 that spreads the second primary modulated wave signal Mo2 and a second spread spectrum signal that is coupled to the first power cable 4 to transmit and receive the spread spectrum modulated signal by the spread spectrum communication system. A coupling circuit TR2,
A second despread demodulation circuit SD2 for despreading and demodulating the received second spread modulation reception signal Tr2;
Of the despread demodulated signal Sd2 of the second central processing circuit CP
A second primary modulated wave demodulation circuit DE2 for demodulating into a signal corresponding to U2, and a feed motor control signal supply voltage Sk supplied from the feed device built-in control power supply SP as a power source. A feed motor control circuit GA for inputting Sa to drive the feed motor M, and a solenoid valve ON supply voltage So supplied by the feed power control apparatus SP with built-in feed device are used as power sources to input a solenoid valve drive signal S2. And a solenoid valve drive circuit SW for turning on / off the solenoid valve SOL, and the control voltage input by the control power supply SP with a built-in feeder is in the welding standby state during the welding standby period (T6 and T7 in FIG. 5). It is supplied from the output control power supply PS, is supplied from the arc voltage during the welding period and the anti-stick period (T3 and T4 in FIG. 5), and the welding power source WER2 is negative during the no-load voltage output period (T2 in FIG. 5). A consumable electrode arc welding system is supplied from the voltage.

The invention of the apparatus of claim 4 at the time of filing is that the output voltage supplied from the output control power source PS during welding standby according to claim 1 at the time of filing, claim 2 at the time of filing or claim 3 at the time of filing During the standby period (T6 and T7 in FIG. 5), the consumable electrode type arc welding device has a voltage of a predetermined value of the effective value AC25V which is the standard value of the protection extraordinary low voltage (PELV) or DC60V without ripple.

The invention of the apparatus of claim 5 at the time of application is a consumable electrode type arc welding apparatus in which the spread spectrum communication system according to claim 2 at the time of application or claim 3 at the time of application is a direct spread method.

The invention of the apparatus of claim 6 at the time of filing is that the control power supply SP with a built-in feeding device according to claim 2 at the time of filing or claim 3 at the time of filing has the first power cable 4 and the first power cable 4 via the diode DR4. The auxiliary power supply capacitor C, which is connected to the second power cable 5 and is connected to both ends of the power supply SP with built-in feeding device, supplies stable power against fluctuations in power supply, Motor M and solenoid valve SO
The second central processing circuit supply voltage Sp is output to the circuit that controls L, the feed motor control circuit supply voltage Sk is output to the circuit that controls the feed motor M, and the solenoid valve SOL is turned on.
This is a consumable electrode type arc welding device that outputs a solenoid valve ON supply voltage So to an N / OFF circuit.

The invention of the apparatus of claim 7 at the time of filing is that the output control power supply PS during welding standby according to claim 1 at the time of filing, claim 2 at the time of filing or claim 3 at the time of filing has an output current value of 3 at the time of short circuit.
It is a consumable electrode type arc welding device of A or less.

The invention of the apparatus of claim 8 at the time of filing is a hybrid in which the spread spectrum communication system according to claim 2 at the time of filing or claim 3 at the time of filing is a frequency hopping system, a chirp system, or a combination of the above systems. It is a consumable electrode type arc welding device of the type.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram best representing the features of the invention according to the application. Since it is the same as FIG. 4 described later, the description will be described later with reference to FIG.

The embodiment of the present invention is the invention of the apparatus of claim 2 at the time of filing, in which the welding power source WER2 provided with the welding power source output circuit WP for outputting welding power is moved along with the movement of the welding position. In the consumable electrode type arc welding device separated from the wire feeding device WSR2 carried by the welding operator, the welding power source WER2 (without a control cable) is used.
And a welding standby output control power supply PS for supplying the control voltage for controlling the feed motor M and the solenoid valve SOL to the first power cable 4 and the second power cable 5 or the ground wire during the welding standby. , The wire feeder WSR2 (which does not require a control cable), the first power cable 4 and the second power cable 4
(1) The welding power source WER2 is coupled to the first power cable 4 and spread by a spread spectrum communication method. Spreading signal combining circuit TR for transmitting / receiving a modulation signal and received spread modulation receiving signal T
A despread demodulation circuit SD that despreads r to perform demodulation, a primary modulated wave demodulation circuit DE that demodulates the demodulated despread demodulation signal Sd into a signal corresponding to the central processing circuit CPU, and a central processing circuit CPU Signal modulation circuit MO for primary-modulating the welding current detection / welding supervisory signal Cr output from and a spread-modulation circuit SI for spectrally spreading the primary modulation wave signal Mo
And the welding power source start signal Ct and the output voltage setting signal Cp calculated by the value of the welding power source start / output voltage setting reception signal De demodulated by the primary modulated wave demodulation circuit DE.
When the central processing unit CPU which outputs the signal to the CPU and the welding power source activation signal Ct are input, the operation is started and the values of the output voltage setting signal Cp, the output voltage detection signal Vd and the output current detection signal Id are set. And an output control circuit SC2 for controlling the output of the welding power source output circuit WP by performing a calculation process accordingly. (2) The wire feeding device WSR2 receives a solenoid valve drive signal when the torch switch activation signal Ts is input. S2
Is output, and the feed motor control signal Sa is output according to the welding current setting signal Wi output by the welding current setting device WI and the crater current setting signal Ci output by the crater current setting device CI, and the welding voltage setting device WV outputs A second central processing circuit C that outputs a welding power source start-up / output voltage setting transmission signal Ck according to the welding voltage setting signal Wv that is output and the crater voltage setting signal Cv that is output by the crater voltage setting device CV.
PU2, a second signal modulation circuit MO2 that firstly modulates the welding power supply start-up / output voltage setting transmission signal Ck, and a second
A second spread spectrum modulation circuit SI2 for spread spectrum of the primary modulated wave signal Mo2 and a second spread spectrum signal combination circuit TR2 for transmitting and receiving the spread spectrum modulated signal by the spread spectrum communication system by being coupled to the first power cable 4. The second despread demodulation circuit SD2 that despreads the received second spread modulation received signal Tr2 and demodulates it, and the demodulated second despread demodulation signal Sd2 corresponds to the second central processing circuit CPU2. A second primary modulated wave demodulation circuit DE2 for demodulating into a signal, a feed motor control circuit GA for driving the feed motor M by inputting the feed motor control signal Sa, and a solenoid valve drive signal S2.
And a solenoid valve drive circuit SW for turning on / off the solenoid valve SOL, and the control voltage inputted by the control power source SP with a built-in feeding device is the welding standby period (T6 and T in FIG. 5).
7) is supplied from the above-mentioned welding standby output control power supply PS, and is supplied from the arc voltage during the welding period and the anti-stic period (T3 and T4 in FIG. 5) and the no-load voltage output period (T2 in FIG. 5). Inside is a consumable electrode type arc welding device supplied from the no-load voltage of the welding power source WER2.

[0027]

In FIG. 4, the same reference numerals as those in FIG. 2 perform the same operations, so the description thereof will be omitted and different operations will be described. When the consumable electrode 2 contacts the work piece 1, the output side of the welding power source WER2 (which does not require a control cable) is short-circuited via the first power cable 4 and the second power cable 5.

Welding power source WER2 and wire feeding device WSR
The transmission / reception of the control signal to / from the transmission / reception device 2 via the first power cable 4 is a spread spectrum communication system (Spread).
Direct diffusion method (D) which is a typical example of Spectrum)
The description will be given by using the direct spread).

The output control unit of the welding power source WER2 includes an output control circuit SC2, an output current detection circuit ID, an output voltage detection circuit VD, a spread signal coupling circuit TR, a despread demodulation circuit SD,
It is composed of a primary modulated wave demodulation circuit DE, a spread modulation circuit SI, a signal modulation circuit MO, a central processing circuit CPU and the like. The spread signal coupling circuit TR includes the first power cable 4 between the welding power source WER2 and the wire feeder WSR2.
A spread spectrum modulated signal is combined with and transmitted and received by a spread spectrum communication system. The despread demodulation circuit SD demodulates the wideband spread modulation reception signal Tr by the spreading code into a despread demodulation signal Sd of a narrow band modulation signal by a method called despreading. The primary modulation wave demodulation circuit DE includes the despread demodulation signal S
The primary modulated wave of d is demodulated into a signal corresponding to the central processing circuit CPU. The central processing circuit CPU calculates according to the value of the signal demodulated by the primary modulation wave demodulation circuit DE, and outputs the welding power source start signal Ct and the output voltage setting signal Cp.
Separated and output. The output control circuit SC2 starts its operation when the welding power source activation signal Ct is input, and performs arithmetic processing according to the values of the output voltage setting signal Cp, the output voltage detection signal Vd, and the output current detection signal Id. The output control signal Sc is output.

The central processing circuit CPU receives the welding monitoring signal Ww and the welding current detection signal Wr from the output control circuit SC2.
Accordingly, the welding current detection / welding monitoring transmission signal Cr is output. The signal modulation circuit MO PSK (Phase Shift Keying) the carrier wave according to the value of the input signal.
The primary modulated wave signal Mo modulated to is output. The spread spectrum modulation circuit SI spreads the narrow-band primary modulated wave signal Mo with a spread code to spread spectrum the modulated transmission signal Si.
To.

The welding standby output control power supply PS is formed by a welding standby supply auxiliary transformer TO2, a current limiting resistor R, and an auxiliary power supply rectifying circuit DR3. Also,
The output voltage of the output control power supply PS during the welding waiting state is the effective value AC2 which is the standard value of the protection extraordinary low voltage (PELV) shown in JIS B9960-1: 1999.
In order to satisfy 5 V or 60 V DC without ripple or less, the winding ratio on the secondary side of the auxiliary supply transformer TO2 during welding standby is set to a predetermined value. Further, the value of the current limiting resistor R is set to a predetermined value so that the value of the output current is several A or less.

The wire feeding device WSR2 includes a diode D
Auxiliary power supply capacitor C connected to the first power cable 4 and the second power cable 5 via R4,
Similarly, a power supply device built-in control power source SP, a second spread signal coupling circuit TR2, a second despread demodulation circuit SD2, which are connected to the first power cable 4 and the second power cable 5,
Second primary modulated wave demodulation circuit DE2, second spread modulation circuit SI2, second signal modulation circuit MO2, second central processing circuit CPU2, feed motor control circuit GA, feed motor M, inching switch IT, gas check switch G
C, a welding current setting device WI, a crater current setting device CI, a welding voltage setting device WV, a crater voltage setting device CV, a solenoid valve drive circuit SW, a solenoid valve SOL, and a display unit LD are incorporated.

The diode DR4 is a protection diode, and the auxiliary power supply capacitor C is an auxiliary power supply capacitor for accumulating the electric power of the control power supply SP with a built-in feeder. The voltage input to the control-device power supply SP with a built-in feeder is supplied from the welding standby output control power supply PS during the welding standby period (T6 and T7 in FIG. 5), and the welding period and the anti-stick period (see FIG. 5). It is supplied from the arc voltage during T3 and T4) and from the no-load voltage of the welding power source WER2 during the no-load voltage output period (T2 in FIG. 5).

The control power supply SP with a built-in feeding device uses the terminal voltage of the auxiliary power supply capacitor C as an input voltage to supply the second central processing circuit supply voltage Sp, the supply motor control circuit supply voltage Sk, and the solenoid valve ON. The value of the supply voltage So is converted and output. In particular, when the consumable electrode 2 is short-circuited to the work piece 1 during welding, the power supply from the welding power source WER2 is temporarily cut off, but the control power source SP with a built-in feeding device has a large-capacity auxiliary power source capacitor C. Since it is equipped with, stable power supply can be obtained.

The second central processing circuit CPU2 uses the second central processing circuit supply voltage Sp supplied from the feeding power control device SP as a control voltage and starts the torch switch output from the torch switch TS. Signal Ts, welding current setting signal Wi having a predetermined value set by welding current setting device WI, welding voltage setting signal Wv having a predetermined value set by welding voltage setting device WV, setting by crater current setting device CI Crater current setting signal Ci having a predetermined value and Crater voltage setting signal C having a predetermined value set by crater voltage setting device CV
v, the feeding motor control according to the values of the welding current detection / welding monitoring reception signal De2 received from the welding power source, the inching signal It set by the inching switch IT, and the gas check signal Gc set by the gas check switch GC The signal Sa, the welding power source start-up / output voltage setting transmission signal Ck, the solenoid valve drive signal S2, and the display signal Ld are output.

The feed motor control circuit GA uses the feed motor control circuit supply voltage Sk supplied from the feed power control device SP as a control power source, and uses the second central processing circuit CP.
According to the value of the feed motor control signal Sa output from U2, the feed motor output signal Ga is output to feed the feed motor M.
Control the rotation speed of.

The solenoid valve drive circuit SW uses the solenoid valve ON supply voltage So input from the feeding power control device SP as a control power source, and the solenoid valve drive signal S2 output from the second central processing circuit CPU2. The solenoid valve SOL is operated by to turn on / off the solenoid valve SOL.

The second signal modulation circuit MO2 outputs a second primary modulated wave signal Mo2 in which the carrier wave is modulated into PSK according to the value of the welding power source start-up / output voltage setting transmission signal Ck. The second spread modulation circuit SI2 spreads the narrow band second primary modulated wave signal Mo2 with a spread code to modulate a wide band second spread modulated transmission signal Si2.
The second spread signal coupling circuit TR2 couples the spread modulation signal to the first power cable 4 between the welding power source WER2 and the wire feed WSR2, and transmits / receives by the spread spectrum communication method. The second despread demodulation circuit SD2 demodulates the wideband second spread modulation reception signal Tr2 into a second despread demodulation signal Sd2 of a narrow band modulation signal by a method called despreading using a spreading code. Second primary modulated wave demodulation circuit DE
2 demodulates the primary modulated wave of the second despread demodulated signal Sd2 into a signal corresponding to the second central processing circuit CPU2.

FIG. 5 is a timing chart for explaining the operation of the consumable electrode type arc welding apparatus of the present invention shown in FIG. FIG. 5A shows the output voltage detection signal Vd.
(B) shows the output current detection signal Id. Figure 5 (C)
Shows the torch switch activation signal Ts output from the torch switch TS, and FIG. 5 (D) shows the welding current detection signal W.
Indicates r. 5E shows the terminal voltage of the auxiliary power supply capacitor C, and FIG. 5F shows the welding power supply start-up / output voltage setting transmission signal Ck output from the second central processing unit CPU2. FIG. 5 (G) shows the welding power supply start-up / output voltage setting reception signal De demodulated by the primary modulation wave demodulation circuit DE, and FIG. 5 (H) shows the feed motor control signal Sa. (I) shows the solenoid valve drive signal S2.

FIG. 6 is a detailed view of the direct diffusion system of the consumable electrode type arc welding apparatus of the present invention shown in FIG. The signal modulation circuit MO is formed of a carrier wave generation circuit RF and a primary modulation circuit 1C, and the spreading modulation circuit SI is a spreading code generation circuit D.
M and a secondary modulation circuit 2C, and a despread demodulation circuit S
D is formed by the synchronization circuit SS, the spread code generation circuit DM, the secondary demodulation circuit 2D, and the bandpass filter BF. The second signal modulation circuit MO2, the second spreading modulation circuit SI2, and the second despreading demodulation circuit SD2 are the same as those described above, and will be omitted.

FIG. 7 is a waveform diagram for explaining the operation of the direct diffusion method shown in FIG. FIG. 7A shows the second 1
FIG. 7B shows the second modulated wave signal Mo2, FIG. 7B shows the second spread modulation transmitted signal Si2, FIG. 7C shows the spread modulated received signal Tr, and FIG. The demodulated signal 2d is shown, and FIG. 7E shows the despread demodulated signal Sd.

The operation of the consumable electrode type arc welding apparatus of the present invention shown in FIG. 4 will be described with reference to FIGS. 5, 6 and 7.

At time t = t1 shown in FIG. 5, when the three-phase AC commercial power source AC is input to the welding power source WER2,
The welding standby output control power supply PS outputs an output voltage of a predetermined value to the output terminal of the welding power supply WER2, and for the auxiliary power supply during the welding standby period T6 via the first power cable 4 and the diode DR4. Power is supplied to the capacitor C.

When the terminal voltage of the auxiliary power source capacitor C shown in FIG. 5 (E) exceeds a predetermined value, the feeding device built-in control power source SP starts to operate and the feeding motor control circuit supply voltage is increased. Sk, supply voltage Sp for second central processing circuit
And the supply voltage So for turning on the solenoid valve.

At time t = t2, when the torch switch activation signal Ts shown in FIG. 5 (C) becomes High level, the second central processing circuit CPU2 starts operation to start welding power source / output voltage setting. The transmission signal Ck, the solenoid valve drive signal S2, and the feed motor control signal Sa are output.

The second signal modulation circuit MO2 changes the carrier wave output from the carrier wave generation circuit RF to the primary modulation circuit 1C according to the value of the welding power source start-up / output voltage setting transmission signal Ck.
The second narrow band shown in FIG.
The primary modulated wave signal Mo2 is output. The second spread modulation circuit SI2 spreads the spectrum by the secondary modulation circuit 2C using the high-speed spread code signal Dm output from the spread code generation circuit DM, and the second wide band shown in FIG. 7B.
And outputs the spread modulation transmission signal Si2. The second spread signal coupling circuit TR2 includes a welding power source WER2 and a wire feeding WS.
The second spread modulation transmission signal Si2 is coupled to the first power cable 4 connected to R2 and transmitted.

The spread signal combination circuit TR receives the second spread modulation transmission signal Si2 transmitted by the first power cable 4 and outputs it as the spread modulation reception signal Tr shown in FIG. 7 (C). At this time, the noise generated by the welding machine is also received. The despread demodulation circuit SD has a spreading code signal D output from the spreading code generation circuit DM by the synchronization circuit SS.
m is synchronized with the spreading code on the transmission side, the synchronized spreading code signal is used to despread by the secondary demodulation circuit 2D, and the secondary demodulation signal 2d shown in FIG. Noise is removed by the BF and the despread demodulation signal Sd shown in FIG. 7E is output. At this time, the noise received during transmission is inversely diffused and becomes a signal much smaller than the signal level, so that it is less likely to be affected by the noise.
The primary modulated wave demodulation circuit DE demodulates the despread demodulation signal Sd2 into a welding power supply start-up / output voltage setting reception signal De corresponding to the central processing circuit CPU.

The central processing circuit CPU calculates the value of the welding power supply start-up / output voltage setting reception signal De, and separates and outputs the welding power supply start-up signal Ct and the output voltage setting signal Cp. The output control circuit SC2 uses the welding power source start Ct.
Is started, the output voltage setting signal C
According to the values of p, the output voltage detection signal Vd, and the output current detection signal Id, arithmetic processing is performed to control the value of the output control signal Sc.

When the solenoid valve drive signal S2 shown in FIG. 5 (I) becomes High level, the solenoid valve drive circuit SW becomes
Supply voltage So for solenoid valve ON by solenoid valve drive signal S2
Is output to operate the solenoid valve SOL.

Feed motor control signal Sa shown in FIG.
Is a welding current setting signal Wi set by the welding current setting device WI, a crater current setting signal Ci having a predetermined value set by the crater current setting device CI, a welding current detection / welding monitoring reception signal received from the welding power source. De
2. The second central processing circuit C according to the value of the inching signal It set by the inching switch IT.
It is output from PU2. The feed motor control circuit GA controls the rotation speed of the feed motor M according to the value of the feed motor control signal Sa. During the no-load voltage output period T2, the no-load voltage of the welding power source WER2 supplies power to the auxiliary power source capacitor C.

When the consumable electrode 2 comes into contact with the workpiece 1 at time t = t3, the output control circuit SC2 detects the contact and outputs the welding current detection signal Wr. It also outputs a welding monitoring signal Ww for monitoring welding abnormalities. The central processing circuit CPU has a welding current detection / welding monitoring transmission signal C.
The second central processing unit CPU which outputs r and repeats the spread spectrum modulation and demodulation in the same manner as described above.
2, the rotation speed of the feed motor M is switched from the slowdown speed to a predetermined welding speed in accordance with the demodulated welding current detection / welding monitoring reception signal De2, and an arc start current flows to generate an arc. To do. Further, when a welding abnormality occurs, the abnormality is displayed on the display LD.

During the welding period T3, during the "short circuit transition" short circuit in which the consumable electrode 2 and the workpiece 1 are repeatedly short-circuited and arced, no power is temporarily supplied to the auxiliary power supply capacitor C. Since the auxiliary power supply capacitor C having a large value having a predetermined value is provided, the terminal voltage of the auxiliary power supply capacitor C tends to decrease as shown in FIG. Operates stably.

At time t = t4 shown in FIG. 5, when the torch switch activation signal Ts becomes Low level, the anti-stick period starts, the rotation of the feeding motor M is decelerated, and the feeding of the consumable electrode 2 is stopped. Consumable electrode 2 and work piece 1
"Short circuit transfer" with is completed. During this anti-stick period T4, power is supplied to the auxiliary power supply capacitor C by the arc voltage. When the torch switch activation signal Ts becomes Low level at time t = t4, the second
The central processing circuit CPU2 provides a solenoid valve drive signal S2 with an afterflow period T5 having a predetermined value, and turns on the solenoid valve SOL during the afterflow period T5.

At time t = t6 shown in FIG. 5, the output control circuit SC2 sets the inverter drive signal Ir to the low level to stop the operation of the inverter circuit INV, and the output of the output control power supply PS during welding standby (protection special low Voltage) to supply power to the auxiliary power supply capacitor C during the welding standby period T7.

In the present invention, the spread spectrum communication system (S
Although the direct spread method (Direct Spread), which is a typical example of the pread spectrum, is used, the spread spectrum communication method may be a frequency hopping method, a chirp method, or a hybrid method combining them.

[0056]

According to the present invention, each control signal is supplied from the wire feeder to the welding power source by the spread spectrum communication method via the power cable between the welding power source and the wire feeder. On the contrary, since power can be supplied from the welding power source to the control power supply with a built-in feeding device of the wire feeding device via the power cable, (1) the wire feeding device control cable and the remote control device control cable are not required The movement of the feeding device is facilitated, and the cause such as the disconnection of the control cable is removed, so that the efficiency and quality of welding work can be significantly improved. (2) Since the spread spectrum communication system can transmit and receive a large amount of information, it is possible to control all operations on the front panel of the welding power source on the wire feeder side without increasing the number of control lines. (3) Noise-resistant and highly reliable information can be transmitted at a welding site where the noise environment is extremely bad.

[Brief description of drawings]

FIG. 1 is a diagram best representing the features of the invention according to the application.

FIG. 2 is a connection diagram of a conventional consumable electrode type arc welding apparatus.

FIG. 3 is a timing chart for explaining the operation of the conventional consumable electrode type arc welding apparatus shown in FIG.

FIG. 4 is a connection diagram of the consumable electrode type arc welding apparatus of the present invention.

5 is a timing chart for explaining the operation of the consumable electrode type arc welding apparatus shown in FIG.

FIG. 6 is a detailed diagram of a direct diffusion method.

FIG. 7 is a waveform diagram for explaining the operation of the direct diffusion method shown in FIG.

FIG. 8 is a diagram in which a ground wire is added to the connection diagram of the consumable electrode type arc welding apparatus of the present invention in FIG.

[Explanation of symbols]

1 Workpiece 2 Consumable Electrode 3 Feeding Roll 4 First Power Cable 5 Second Power Cable 6 Start Signal Control Line 7 Motor Control Line 8 Solenoid Valve Control Line 9 GND Line 10 Wire Feeder Control cable 11 Remote control power line 12 Welding current setting control line 13 Welding voltage setting control line 14 Remote control GND line 15 Inching control line 16 Remote control device control cable AC Three-phase AC commercial power supply BF Bandpass filter C Auxiliary power supply capacitor CI Crater current setting device CV Crater voltage setting device 1C Primary modulation circuit 2C Secondary modulation circuit CPU Central arithmetic processing circuit CPU2 Second central arithmetic processing circuit DE Primary primary modulated wave demodulation circuit DE2 Second primary Modulation wave demodulation circuit DL DC reactor DM Spread code generation circuit DR1 Primary rectification circuit DR2 Secondary rectification circuit DR3 Auxiliary power supply rectification circuit DR4 Diode 2D secondary demodulation circuit GA Feed motor control circuit GC Gas check switch LD Display ID output current detection circuit IR Inverter drive circuit IT Inching switch INT Main transformer INV Inverter circuit M Feed motor MS Control power supply Assembly MO Signal modulation circuit MO2 Second signal modulation circuit PS Welding standby output control power supply R Current limiting resistor RF Carrier wave generation circuit REM Remote control device SC (using control cable) Output control circuit SC2 (no control cable required) Output control circuit SD Despreading demodulation circuit SD2 Second despreading demodulation circuit SP Feeder built-in control power supply SI Spreading modulation circuit SI2 Second spreading modulation circuit SOL Solenoid valve SS Synchronous circuit SW Solenoid valve drive circuit SW1 Solenoid valve open / close switch TO Auxiliary transformer TO2 melted while power is on Standby supply auxiliary transformer TH Welding torch TS Torch switch TR Spreading signal coupling circuit TR2 Second spreading signal coupling circuit VD Output voltage detection circuit WI Welding current setting device WP Welding power output circuit WV Welding voltage setting device WER (Prior art) Welding power supply WER2 (using a control cable) (not using the control cable used in the present invention) Welding power supply WSR (using a control cable in the prior art) WSR2 (no control cable used in the present invention) Wire feeding device Equipment Ci Crater current setting signal Ct Welding power supply starting signal Cp Output voltage setting signal Cr Welding current detection / welding monitoring transmission signal Ck Welding power supply starting / output voltage setting transmission signal Cv Crater voltage setting signal De Welding power supply starting / output voltage setting Received signal Dm Spread code signal 2d Secondary demodulation signal De2 Welding current detection / welding monitoring Signal signal Ga Output signal for feed motor Gc Gas check signal Id Output current detection signal It Inching signal Ir Inverter drive signal Mo Primary modulated wave signal Mo2 Second primary modulated wave signal Sa Feed motor control signal Sc Output control signal Sd despread demodulation signal Sd2 second despread demodulation signal Si 2 diffusion modulation transmission signal Si2 second diffusion modulation transmission signal So solenoid valve ON supply voltage Sp second central processing circuit supply voltage Ss synchronization signal Sk transmission Motor control circuit supply voltage S1 Solenoid valve opening / closing signal S2 with built-in welding power source Solenoid valve drive signal Ts Torch switch activation signal Tr Spread modulation reception signal Tr2 Second diffusion modulation reception signal T1 Torch switch startup period T2 No load voltage output period T3 Welding Period T4 Anti-stick period T5 Afterflow period T6, T7 Welding standby period Vd Output power Detection signal Wi welding current setting signal Wv welding voltage setting signal Wr welding current detection signal Ww Welding monitoring signal

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4E082 AA01 BA01 CA01 DA01 EA02                       EC03 EC13 EF04 EF16 GA02

Claims (8)

[Claims] 1. A consumable electrode type arc welding in which a welding power source having a welding power source output circuit for outputting welding power and a wire feeding device carried by a welding operator along with movement of a welding position are separated from each other. In the apparatus, a first control voltage is applied to the welding power source to control the feed motor and the solenoid valve while waiting for welding.
And a power supply for welding standby control for supplying to the power cable and the second power cable or the ground wire, and the wire feeding device is supplied from the first power cable and the second power cable or the ground wire. A control power supply with a built-in feeding device for inputting the control voltage, and a second output motor control signal and a solenoid valve drive signal when the output voltage of the control power supply with a built-in feeding device and a torch switch start signal are input. Central processing circuit, feed motor control circuit for inputting feed voltage for feed motor control circuit and feed motor control signal of the control power supply with built-in feed device, and solenoid valve of the control power supply with built-in feed device turned on For transmitting and receiving each control signal between the welding power source and the wire feeding device, and the solenoid valve driving circuit and the solenoid valve which receive the supply voltage and the solenoid valve driving signal for the first power cable. Consumable electrode type arc welding apparatus having a spread spectrum communication unit for transmitting and receiving via the Le in the spread spectrum communication system. 2. A consumable electrode type arc welding in which a welding power source having a welding power source output circuit for outputting welding power and a wire feeding device carried by a welding operator along with movement of a welding position are separated. In the apparatus, a first control voltage is applied to the welding power source to control the feed motor and the solenoid valve while waiting for welding.
And a second power cable for supplying power to the power cable and the second power cable or the ground wire, and a control voltage is input to the wire feeding device from the first power cable and the second power cable or the ground wire. The welding power source includes a spread signal combination circuit for transmitting and receiving a spread modulation signal by a spread spectrum communication system by connecting to the first power cable, and a reverse power supply for the received spread modulation reception signal. A despread demodulation circuit that spreads and demodulates, a primary modulation wave demodulation circuit that demodulates the demodulated despread demodulation signal into a signal corresponding to the central processing circuit, and welding current detection and welding output from the central processing circuit A signal modulation circuit for primary-modulating the monitoring signal, a spread modulation circuit for spreading the spectrum of the primary-modulation-wave signal, and a welding power source demodulated by the primary-modulation-wave demodulation circuit. A central processing circuit that calculates according to the value of the received signal for dynamic / output voltage setting and outputs the signal separately from the welding power source start signal and the output voltage setting signal, and operates when the welding power source start signal is input. Start, output voltage setting signal, comprising an output control circuit for controlling the output of the welding power supply output circuit by performing arithmetic processing according to the values of the output voltage detection signal and the output current detection signal, the wire feeding device, When the torch switch start signal is input, the solenoid valve drive signal is output, and the feed motor control signal is output according to the welding current setting signal output by the welding current setting device and the crater current setting signal output by the crater current setting device. The welding power source start-up / output voltage setting transmission signal is output according to the welding voltage setting signal output by the welding voltage setting device and the crater voltage setting signal output by the crater voltage setting device. A central processing circuit, a transmission signal for the welding power source start-output voltage setting 1
A second signal modulation circuit for next modulation, a second spread modulation circuit for spread spectrum of the second primary modulated wave signal, and a spread modulation signal by a spread spectrum communication method by being coupled to the first power cable 4. A second spread signal combination circuit for transmitting and receiving, a second despread demodulation circuit for despreading and demodulating the received second spread modulation received signal, and a demodulated second despread demodulated signal for the second A second primary modulation wave demodulation circuit for demodulating into a signal corresponding to the central processing circuit, a feed motor control circuit for inputting the feed motor control signal to drive the feed motor, and a solenoid valve drive signal. Input and turn on the solenoid valve SOL
A solenoid valve drive circuit for turning on / off the control voltage input by the control power supply with a built-in feeding device is supplied from the output control power supply during welding standby during the welding standby period, and during the welding period and the anti-stick period. Consumable electrode type arc welding equipment that is supplied from the arc voltage and is supplied from the no-load voltage of the welding power source during the no-load voltage output period. 3. A consumable electrode type arc welding, which is separated into a welding power source having a welding power source output circuit for outputting welding power and a wire feeding device carried by a welding operator when the welding position moves. In the apparatus, a first control voltage is applied to the welding power source to control the feed motor and the solenoid valve while waiting for welding.
And a second power cable or a ground wire for supplying power to the second power cable and a grounding wire, and the wire feeder is provided with a control voltage from the first power cable and the second power cable or the ground wire. The welding power source is equipped with a control power source with a built-in feeding device for inputting, and the welding power source couples a spread signal combining circuit for transmitting and receiving a spread modulation signal by a spread spectrum communication method to the first power cable, and a received spread modulation received signal. A despread demodulation circuit that performs despreading and demodulation,
A primary modulation wave demodulation circuit for demodulating the demodulated despread demodulation signal into a signal corresponding to a central processing circuit; and a signal modulation circuit for primary modulating a welding current detection / welding monitoring signal output from the central processing circuit, A spread modulation circuit that spreads the spectrum of the primary modulated wave signal, and a welding power source startup signal and an output voltage that are calculated according to the values of the welding power source startup / output voltage setting received signal demodulated by the primary modulated wave demodulation circuit. A central arithmetic processing circuit that outputs separately to a setting signal, and starts operation when the welding power source start signal is input, and operates according to the values of the output voltage setting signal, the output voltage detection signal, and the output current detection signal. An output control circuit for performing processing to control the output of the welding power source output circuit, wherein the wire feeding device uses a second central arithmetic processing circuit supply voltage supplied by a feeding device built-in control power source as a power source. When the torch switch start signal is input, the solenoid valve drive signal is output, and the feed motor control signal is output according to the welding current setting signal output by the welding current setting device and the crater current setting signal output by the crater current setting device. And a welding voltage setting signal output by the welding voltage setting device and a crater voltage setting signal output by the crater voltage setting device, the welding power source start / output voltage setting transmission signal is output. A circuit, a second signal modulation circuit that first-modulates the welding power source start-up / output voltage setting transmission signal, a second spread-modulation circuit that spreads the spectrum of the second primary-modulation wave signal, and a first A second spread signal combining circuit that is connected to a power cable to transmit and receive a spread modulation signal by a spread spectrum communication system, and a second spread signal receiving circuit that despreads the received second spread modulation received signal for demodulation. Despread demodulation circuit, a second primary modulated wave demodulation circuit for demodulating the demodulated second despread demodulation signal into a signal corresponding to the second central processing circuit, and the control device built-in power supply device. A feed motor control circuit for driving the feed motor by inputting the feed motor control signal using the supply voltage for the feed motor control circuit to be supplied as a power source, and an electromagnetic valve ON supplied by the control power supply with a built-in feed device. And a solenoid valve drive circuit for turning on / off the solenoid valve by inputting a solenoid valve drive signal using the supply voltage for power supply as a power source,
The control voltage input by the control power supply with a built-in feeding device is supplied from the welding control output control power supply during the welding standby period, is supplied from the arc voltage during the welding period and the antistic period, and is during the no-load voltage output period. Is a consumable electrode type arc welding device supplied from the no-load voltage of the welding power source. 4. The output voltage supplied from the welding standby output control power source according to claim 2 or claim 3 is an effective value AC25V which is a standard value of a protection extra low voltage (PELV) during a welding standby period, or Consumable electrode type arc welding device having a predetermined value of DC 60V or less without ripple. 5. A consumable electrode type arc welding device in which the spread spectrum communication system according to claim 2 or 3 is a direct spread system. 6. The feeding device built-in control power source according to claim 2 or 3 is connected to the first power cable and the second power cable via a diode, and the feeding device is also provided. A capacitor for auxiliary power supply that supplies stable power to fluctuations in power supply is connected to both ends of the built-in control power supply, and a second central processing circuit supply voltage is supplied to the circuit that controls the feed motor and the solenoid valve. The solenoid valve O is output to the circuit for controlling the feed motor, the feed voltage for the feed motor control circuit is output, and the solenoid valve SOL is turned on and off.
Consumable electrode type arc welding device that outputs N supply voltage. 7. A consumable electrode type arc welding apparatus, wherein the welding standby output control power source according to claim 2 or 3 has an output current value of 3 A or less when a short circuit occurs. 8. A consumable electrode type arc welding device, wherein the spread spectrum communication system according to claim 2 or 3 is a frequency hopping system, a chirp system or a hybrid system in which the systems of each set are fused.