SU1461596A1 - Apparatus for arc welding - Google Patents

Abstract

The invention relates to the welding industry, namely to means for automating the welding processes. The purpose of the invention is to expand the functional and technological capabilities of the device. The device contains a power source for the welding arc, a switch and a power source for the auxiliary arc. There is a welding circuit breaker, an additional switch, a voltage sensor on the electrode gap, a welding current sensor, and a remote welding current controller with a phase-generating set-top box (AF). The phase-sensitive circuit of the FP is connected to the network, and the output of the FP is connected to a reversible electric drive. The control unit for the state of the welding circuit is connected to the electrode by an input, and the output to the switching-off circuits of the switch and the circuit breaker of the welding circuit. The device provides welding both at constant and alternating current, excitation of the welding arc without electrode freezing, remote control of the welding current and limiting the voltage during idling when it is exposed for longer than 1 s. 1 il. C to (L

Description

The invention relates to welding production, in particular to means for automating welding processes.

The purpose of the invention is to expand the functional and technological capabilities of the device for arc welding.

On the drawing.e presents a block diagram of a device for arc welding.

The device contains a source of power supply for the welding arc (rectifier or transformer), a limiter 2 of power consumption in the form of a switch, an auxiliary power supply source 3, an electrode 4, an interrupter 5 of the welding circuit, an additional switch 6, a welding circuit 7, a voltage sensor 8 on the electrode gap, welding current sensor 9, remote welding current controller with phase-setting attachment 10, phase-sensing circuit 11 and reversing

electric drive 12, control unit 13

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state of the welding circuit. At the same time, the source of power 1 of the welding arc (the transmitter or transformer) is connected to the network by means of the limiter 2 of the power consumption in the form of a switch and to the welding electrode 4 by means of the interrupter 5. welding chain. Auxiliary arc power supply 3 is connected

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It is connected to the supply network and through the additional switch 6 to the electrode 4. The sensor 7 of the welding circuit is connected to the connection circuit of the additional switch 6 of the auxiliary arc power source-3, the voltage sensor 8 on the electrode gap is connected to the power consumption limiter .2 and the chopper 5 of the welding circuit, the welding current sensor 9 is connected to the additional switch 6. The phase-sensitive circuit 11 is connected to the network, one of its inputs is connected to the electrode 4, and the output is reversibly The electric drive 12 is connected to the power source 1, the second input is connected to the output of the welding circuit 7 sensor, the input of the welding circuit state control unit 13 is connected to the electrode 4, and the output is connected to the switch-off circuit of the power consumption limiter 2 and the welding circuit 5 .

The device works as follows. .

Idle mode. In idle mode, the power source 1 of the welding arc is disconnected from the mains supply of the limiter 2 power consumption. V. Depending on the design of the sensor 7, the welding circuit is connected from it to the electrode 4, a voltage can be applied, limited to a value not exceeding 12 V. The voltage acting on the electrode 4 in idle mode is monitored by welding state control unit 13 chains.

The remote control of the welding current is done at idle.

 Regulation is carried out in c; i, as follows. A phase-assigning prefix 10 containing a diode includes

with between electrode 3 and ground. Depending on the inclusion of the diode of the phase-generating device 10, the phase-sensitive circuit 11 generates control pulses along the corresponding phase channel, ensuring the inclusion

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reversing electric drive 12 and its operation with a predetermined direction of rotation. The actuator 12 acts on the control system of the welding current of the power source 1 for the welding arc (moving coils, ui, current setting potentiometer).

Welding. Welding is performed by touching the electrode 4 of the product to be welded. In this case, the sensor 7 closes the welding circuit, including an additional switch 6. In the welding circuit, a current of about 45 7A arises when the voltage of the source 3 of the auxiliary arc 70-1OOV is applied. At the same time, the signal from sensor 7 disconnects from the welding circuit the phase-sensitive circuit 11 of the on-line current regulator. When the electrode 4 is removed, a low amperage auxiliary arc is excited from the product, the voltage of which is fed to the input of the voltage sensor 8 on the electrode

5 span. When the sensor 8 is turned on, the signal from its output is fed to the control inputs of the limiter 2 power consumption and the breaker 5 of the welding circuit, ensuring their inclusion.

In a circuit formed by an auxiliary arc, a welding current arises and a welding arc is energized. At that, the welding current sensor 9 is turned on, which disconnects the additional switch 6, and the auxiliary arc power source 3 is switched to idle mode. Welding is carried out by biological methods.

Welding ends with an electric arc rupture, while on the electrode 4 a no-load voltage is applied to the source I of the power supply of the welding arc, which acts

5 to block 13 of the control, producing its inclusion. The signal from the coitrol unit 13 is fed to the control circuits of the 2 pb consumption limiter and to the welding circuit breaker 5, turning them off and switching the device to idle mode.

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Claims (1)

Invention Formula gg Device for arc welding, containing a power source of the welding arc, an electrode, a power consumption limiter in the form of a commutator and a power source