JP2014076478A - Welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that if an emergency situation occurs when an operator performs a welding operation at a far distance from a welding power supply unit, the operator cannot quickly turns off a no-fuse breaker of the welding power supply unit.SOLUTION: In a welding machine including a no-fuse breaker, a welding power supply unit comprising a main circuit which converts commercial AC electric power into electric power suitable to welding and a main control circuit which controls the output of the main circuit, a welding torch, and a feeder which feeds a welding wire to the welding torch, the welding torch is provided with a microphone and the welding power supply unit is provided with a breaker drive circuit which turns off the no-fuse breaker. The main control circuit enters a speech recognition mode when an operation switch of the welding torch is turned on and off a plurality of times within a predetermined time so as to receives a predetermined speech picked up by the microphone through a connection cable and to turn off the no-fuse breaker by driving the breaker drive circuit when the sound volume of the speech is larger than a predetermined sound volume reference value.

Description

  The present invention relates to remote control of a no-fuse breaker provided in a welding power source device forming a welding machine.

  When an emergency occurred in the welding machine, the worker handled it by turning off the no-fuse breaker provided in the welding power supply. However, where the work place where welding is performed is narrow, the worker has to move in a limited narrow space, and it takes time to turn off the no-fuse breaker.

A conventional welding machine 20 will be described with reference to FIG.
A welding power source device 21 shown in FIG. 3 has a no-fuse breaker 23 for energizing or cutting off the commercial AC power source AC, and a commercial AC power source AC supplied from the no-fuse breaker 23 with a DC output power suitable for arc welding. The main circuit 4 that generates and outputs and the main control circuit 22 that controls the output of the main circuit 4 are formed.

  One output terminal of the welding power source device 21 is connected to the feeding device 25 via a connection cable 26 in which power lines and communication lines are mixed, and the feeding device 25 is also connected to the welding torch 24 via the connection cable 26. Is done. The other output terminal of the welding power source device 21 is connected to the workpiece 12 via the grounding cable 15.

The feeding device 25 shown in FIG. 3 feeds the wire electrode 11 to the welding torch 24 in accordance with the output control of the main control circuit 22.

  As the welding torch 24 generates an arc from the wire electrode 11, the shielding gas is injected around the arc (around the electrode 11). That is, the shield gas stored in the gas storage device 14 is supplied via the supply hose 17 between the gas storage device 14 and the feeding device 25 and between the feeding device 25 and the welding torch 24. The The gas storage device 14 includes a gas regulator 13 (not shown) that adjusts the gas supply amount. The regulator supplies the gas supply amount (torch) to the welding torch 24 based on the control of the main control circuit 22. The injection amount from 24) is adjusted.

The welding torch 24 is provided with an operation switch 9 that can be manually operated by an operator. The operation switch 9 is capable of operating commands relating to welding such as arc welding start / stop (on / off), parameter adjustment such as output current / voltage, and the like, and is transmitted to the main control circuit 22 via the connection cable 26. .

However, during the welding operation, an emergency situation has occurred in the welding power source device 21 for some reason, and the worker has moved to the no-fuse breaker 23 provided in the welding power source device to ensure safety and turned off. It was. However, when the work place is narrow and there is a distance to the welding power source device, the worker cannot move quickly to the welding power source device 21 and the response to the emergency situation is delayed.
Therefore, for example, as shown in Patent Document 1, a welding power supply device 21 is provided with a microphone, a voice recognition circuit, and a breaker drive circuit. When an emergency situation occurs, the operator speaks loudly toward the microphone, for example, stops. And turned off the no-fuse breaker.

Japanese Unexamined Patent Publication No. Hei 6-27986

  In the prior art, when an emergency situation occurs in the welding power source device, the operator shouts loudly toward the microphone provided in the welding power source device to turn off the no-fuse breaker.

However, even if the surrounding noise is very large at the work site, for example, at a shipyard, when the worker makes a loud stop at the welding power source, the no-fuse breaker is affected by the surrounding noise. There are many things that cannot be turned off. Therefore, an object of the present invention is to supply a welding power supply device that solves the above-described problems.

In order to solve the above-described problems, the first invention is a no-fuse breaker for energizing or interrupting a commercial AC power supply, a main circuit that converts the commercial AC power supply into power suitable for welding, and the main circuit. A welding power source formed by a main control circuit that controls the output of the welding power, a welding torch that generates an arc by receiving the supply of electric power, and a feeding that feeds a welding wire to the welding torch in accordance with the consumption due to the arc A welding machine comprising:
The welding power supply device, the feeding device, and the welding torch are connected by a connection cable, a microphone is provided at a predetermined position on the welding torch, and the no-fuse breaker is turned off to the welding power supply device. A breaker drive circuit is provided, and the main control circuit enters a voice recognition mode when the operation switch of the welding torch is repeatedly turned on and off within a predetermined time a predetermined number of times, and the voice acquired by the microphone is transmitted via the connection cable. And the breaker driving circuit is operated to turn off the no-fuse breaker when the received volume is larger than a predetermined volume reference value.

  2. The welding according to claim 1, wherein the welding torch is provided with a conversion processing circuit that converts a sound acquired by the microphone into a sound signal that can be processed by the main control circuit. Machine.

  3rd invention provides a connection line in the said microphone, and connects to the said welding torch via the said connection line, The welding machine of Claim 1 or Claim 2 characterized by the above-mentioned.

  In the present invention, an emergency situation occurs in the welding power supply device at a work site where there is a large noise around the work site and there is a distance between the worker and the welding power supply device, and the worker is built in the welding power supply device. When you need to quickly turn off the no-fuse breaker, you can speak off a predetermined language (eg, stop) into the microphone on the welding torch so that the no-fuse breaker can be turned off remotely. It becomes possible to handle emergency situations quickly.

It is an electrical connection diagram of the welding machine which concerns on Embodiment 1 of this invention. It is a detail drawing of the welding power supply device of Embodiment 1. It is an electrical connection diagram of the welding machine of a prior art.

The operation of Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is an electrical connection diagram of a welding machine according to Embodiment 1 of the present invention. In the figure, components having the same reference numerals as those in the electrical connection diagram of the prior art welding electric machine shown in FIG. 3 perform the same operations, and thus the description thereof will be omitted.

  A welding power source device 2 shown in FIG. 1 is a no-fuse breaker 3 for energizing or interrupting a commercial AC power source AC, and a commercial AC power source AC supplied from the no-fuse breaker 3 with a DC output power suitable for arc welding. A main circuit 4 that generates and outputs, and a main control circuit 5 that controls the output of the main circuit 4 and switches from the main control mode to the voice recognition mode when the on / off of the torch switch is repeated a predetermined number of times within a predetermined time. And a breaker driving circuit 6 for turning off the no-fuse breaker 3.

  One output terminal of the welding power source device 2 is connected to the feeding device 7 via a connection cable 16 in which power lines and control lines are mixed, and the feeding device 7 is also connected to the welding torch 8 via the connection cable 16. Is done. The other output terminal of the welding power source device 2 is connected to the workpiece 12 via the ground cable 15.

A feeding device 7 shown in FIG. 3 feeds the wire electrode 11 to the welding torch 8 in accordance with the output control of the main control circuit 5.

  In the welding torch 8, an arc is generated from the wire electrode 11, and a shield gas is injected around the arc. That is, between the gas storage device 14 and the feeding device 7 and between the feeding device 7 and the welding torch 8, the shield gas stored in the gas storage device 14 is supplied to the welding torch 8. Connected by a feeding hose 17.

The welding torch 8 shown in FIG. 1 is provided with an operation switch 9 that can be manually operated by an operator. The operation switch 9 generates an audio signal for starting and stopping arc welding and is transmitted to the main control circuit 5 via the connection cable 16.

  Further, the welding torch 8 is provided with a small microphone 10 and a conversion processing circuit (not shown) that converts a sound acquired by the microphone 10 into a sound signal that can be processed by the main control circuit 5. ing. When the operation switch 9 is repeatedly turned on and off a predetermined number of times at a predetermined time, the conversion processing circuit converts the acquired sound into an audio signal and passes through the control line (not shown) of the connection cable 16 to the main control circuit 5. To enter.

  FIG. 2 is a detailed view of the welding power source device 2 shown in FIG. 1, a no-fuse breaker 3, a breaker drive circuit 6 for turning off the no-fuse breaker 3, and a commercial AC power source supplied from the no-fuse breaker 3. The main circuit 4 that generates and outputs AC with DC output power suitable for arc welding and the output of the main circuit 4 are controlled in response to the turning on of the welding torch 8, and the operation switch 9 is turned on a predetermined number of times at a predetermined time. -Repeating OFF switches from the main control mode to the voice recognition mode. When the volume of the voice exceeds a predetermined volume reference value, the breaker drive circuit 6 is activated, and the no-fuse breaker 3 and the no-fuse breaker 3 And the main control circuit 5 for turning off the power.

Next, the operation will be described.
When an operator confirms an emergency situation with the welding power source device 2 and determines that the no-fuse breaker 3 shown in FIG. 1 needs to be turned off, the operator turns the operation switch 9 of the welding torch a predetermined number of times within a predetermined time. When the voice recognition mode is selected by repeating ON / OFF, the main control circuit 5 recognizes that the voice recognition mode is selected.

Subsequently, when the worker makes a loud voice and stops and shouts toward the microphone 10 provided on the welding torch, for example, a voice (analogue) from the microphone 10 is obtained by a conversion processing circuit (not shown) provided on the welding torch. ) Is converted into an audio signal (digital), and the main control circuit 5 converts the received audio signal into analog, compares the audio volume with a predetermined volume reference value, and drives the breaker when the volume exceeds the volume reference value. The circuit 6 is operated.
At this time, since the sound is converted into a digital signal and transmitted by wire via the connection cable 16, the influence of noise can be suppressed.

  The breaker drive circuit 6 applies a predetermined voltage to the coil built in the no-fuse breaker 3 shown in FIG. 2 to turn off the switches SW1 to SW3, thereby cutting off the supply of the commercial AC power supply AC to the welding power supply device. .

  Although the microphone 10 is disposed at a predetermined position of the welding torch 8, a connection line is provided on the microphone indicated by a dotted line in FIG. 1, a connection portion (not shown) is provided on the welding torch 8, and the microphone 10 is connected via the connection line. May be connected to the welding torch 8. At this time, the microphone is, for example, an ear-hook type microphone, and acquires sound from the worker who wears it.

In order to suppress malfunction due to external noise, the breaker driving circuit 6 may be operated after a predetermined time (for example, 1 second) has elapsed after the volume of the received voice exceeds the volume reference value.

Next, characteristic effects of the present embodiment will be described.
(1) In a work site where there is a distance to move to the welding power source and requires a moving time, when the speaker speaks loudly toward the microphone provided on the welding torch, for example, when the operator stops, the worker can Since the fuse breaker can be turned off, an emergency can be processed quickly.
(2) Since voice (analog) from the microphone is converted into a voice signal (digital signal) and transmitted to the main control circuit via a control line, the operator and the welding power supply device, for example, 10 m to 20 m Even if the noise around the work place is very large, the no-fuse breaker can be accurately turned off remotely without being affected by the noise. Furthermore, the audio signal is transmitted from the welding torch to the main control circuit 5 by using the control line of the existing connection cable 16 together, so that it is not necessary to separately prepare a control line used for the audio signal.

DESCRIPTION OF SYMBOLS 1 Welding machine 2 Welding power supply device 3 No fuse breaker 4 Main circuit 5 Main control circuit 6 Breaker drive circuit 7 Feeder 8 Welding torch 9 Operation switch 10 Microphone 11 Wire electrode 12 Workpiece 13 Gas regulator 14 Gas storage device 15 Ground cable 16 Connection cable 17 Feed hose 20 Welding machine (conventional machine)
21 Welding power supply (conventional machine)
22 Main control circuit 23 No-fuse breaker (conventional machine)
24 Welding torch 25 Feeder (conventional machine)
26 Connection cable 27 Microphone

Claims (3)

  A no-fuse breaker for energizing or shutting off the commercial AC power source, a main circuit for converting the commercial AC power source into power suitable for welding and outputting, and a main power circuit for controlling the output of the main circuit; In a welding machine comprising: a welding torch that generates an arc upon receipt of the supply of electric power; and a feeding device that feeds a welding wire to the welding torch in accordance with wear caused by the arc. The feeding device and the welding torch are connected by a connection cable, a microphone is provided at a predetermined position in the welding torch, and a breaker driving circuit for turning off the no-fuse breaker is provided in the welding power source device. The main control circuit enters the voice recognition mode when the operation switch of the welding torch is repeatedly turned on and off within a predetermined time for a predetermined number of times. Receiving the obtained sound through the connection cable, and operating the breaker driving circuit to turn off the no-fuse breaker when the received volume is larger than a predetermined volume reference value. Machine.   The welding machine according to claim 1, wherein a conversion processing circuit that converts sound acquired by the microphone into a sound signal that can be processed by the main control circuit is provided in the welding torch.   The welding machine according to claim 1, wherein a connection line is provided on the microphone, and the microphone is connected to the welding torch via the connection line.

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