JPH02117776A - Welding current value recognizing method by arc speech - Google Patents

Abstract

PURPOSE:To pertinently maintain welding conditions and to prevent misoperation by detecting a welding current, deciding the size of the welding current by a deciding device, modulating this decided value into a synthesized speech signal by a speech synthesizer and making the welding current recognizable by arc speech. CONSTITUTION:The size of the current required for welding work is set by a setter 14 and decided by an ammeter 13. The size of the current is detected by a detector 15 and this signal is amplified by an amplifier 16. An analog signal of the amplifier is converted into a digital signal by an A/D converter 17 and the size of the welding current is decided by the deciding device 18. This size of this current is converted into the speech signal that 'an ampere is 150' by the speech synthesizer 19 and the analog speech signal is amplified by an amplifier 20 and inputted to a welding power source 12 and the speech signal is superimposed on the welding current. In a modulated welding current part, the size of an arc is vibrated by the speech signal and made to the speech which is transmitted to an operator. By this method, the welding current value recognizing method can be provided by the arc speech.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recognizing an actual welding current value in a welding operation.

[Prior Art] Conventionally, when welding workpieces with a TIG arc welder, the welding current used for the welding work is indicated by a pointer incorporated in the welding current or by a pointer attached externally to the welding power source or by a light emitting element. Recognizes value.

[Issues to be solved by the invention (1) As mentioned above, in the conventional arc welding machine, in order to check or recognize the welding current, it is necessary to actually apply the welding current and
It is necessary to see the display of an analog ammeter with a pointer display or a digital ammeter with a light emitting element.

(2) In addition, in case of (1), it is necessary to temporarily remove the helmet with light-shielding glass used to avoid eye damage caused by arc light, and checking the welding current while performing welding work significantly impedes work efficiency. .

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for recognizing a welding current value using arc sound, which improves welding workability without requiring the operator to view the actual welding current using a digital ammeter or an analog ammeter with a pointer display. shall be.

[Means to solve the problem]

In order to achieve the above object, the present invention detects a welding current when welding a workpiece with an arc welder, causes a judge to judge the magnitude of this welding current, and converts this judgment value into a synthesized voice signal by a voice synthesizer. This allows the actual welding current to be recognized by the arc sound.

[Function] In the present invention, the welding current is modulated by the audio signal, so the arc vibrates with the audio signal, so the audio signal can be recognized as audio through the human ear.

Furthermore, according to the present invention, since the synthesized signal representing the current value used in the welding operation is used as an audio signal, the welding operator can know the magnitude of the welding current while continuing the welding operation.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows the welding process performed by MAG to explain the method of the present invention.
Although an arc welding method may be used, Example TI of the present invention
This shows an overview of the G-arc welding machine. The present invention is based on T.I.
It is not limited to the G arc welding machine, but may also be a MAG arc welding machine.

In the figure, a tungsten W electrode 1 generates an arc 5 between it and a workpiece 7, which is the opposite electrode.

The chuck 2 grips the tungsten electrode 1 and is connected to one electrode of a welding power source 12.

The shield nozzle 3 shields the arc 5 and its vicinity from the atmosphere together with the shield gas 6.

Insulator 4 fixes chuck 2 in position relative to shield nozzle 3. The torch has the configuration described above.

The tip 8 guides the filler wire 9 precisely into the arc 5. The roller 10 is for feeding the filler wire 9 together with the motor 11.

The ammeter 13 measures the welding current. A welding current setting device 14 and a welding current detector 15 are provided. Amplifier 16 scales the signal of detector 15 to an appropriate magnitude.

A/D converter 17 converts the analog output signal of amplifier 16 into a digital signal.

Determination '518 determines the magnitude of the welding current. The audio synthesizer 19 converts the magnitude of the welding current recognized by the determiner 18 into an audio signal. The amplifier 20 is the voice synthesizer 1
9 is amplified and outputted to the welding power source 12, and this signal becomes an audio modulation signal of the welding current. T
is the modulation period of the welding current by the audio signal.

To perform welding work using the welding machine configured as described above, proceed as follows. The magnitude of the current required for welding work is set by the setting device 14, which has a scale, so that the approximate current value can be known, but it is necessary to judge it accurately with the ammeter 13. .

The magnitude of the welding current is detected by a detector 15.

The signal detected by this detector 15 is amplified by an amplifier 16 to a signal of an appropriate magnitude.

Since the determiner 18 using digital signal processing is used to determine the absolute value of the welding current from the signal of the amplifier 16, the analog signal of the amplifier 16 is converted into a digital signal by the A/D converter 17.

Then, the determination device 18 determines the magnitude of the welding current. The magnitude of the welding current determined by this determiner 18 is determined by the voice synthesizer 19.
It is converted into an audio signal that says "Ha hyaku gojugo ampeades".

The analog audio signal from the audio synthesizer 19 is amplified to an appropriate size by an amplifier 20 and input to the welding power source 12, where the audio signal is superimposed around the welding current set by the setting device 14.

In this case, when no audio signal is superimposed, the welding current becomes a constant current as shown in FIG.

FIG. 3 shows a welding current obtained by superimposing an audio signal (in other words, modulating the constant welding current with an audio signal) using the constant welding current shown in FIG. 2 as a bias.

As shown in FIG. 3, in the part of the welding current modulated by the audio signal, the magnitude of the arc is vibrated by the audio signal, and the sound is transmitted to the ears of the welding operator.

As a result, the welding operator can know the magnitude of the welding current actually used while performing the welding work.

Note that T is the modulation period of the welding current by the audio signal,
This modulation period T is usually selected to be 5 to 60 seconds.

[Effects of the Invention] According to the present invention described above, a welding operator can know the welding current without interrupting the welding operation, and the welding operator can monitor the actual welding operation by listening to the arc sound. Since the current can be known and the welding current can be checked at appropriate intervals, it is possible to provide a welding current value recognition method using arc sound, in which welding conditions are always properly maintained and no operational errors occur.

[Brief explanation of the drawing]

1v4 is a configuration diagram of an arc welding machine to explain the method of the present invention, FIG. 2 is a normal welding current waveform diagram to explain the operation of FIG. 1, and FIG. 3 is a diagram of the operation of FIG. 1. FIG. 4 is a welding current waveform diagram modulated by an audio signal. 1...Tungsten electrode, 2...Chuck, 3...
- Shield nozzle, 4... Insulator, 12... Welding power source, 15... Detector, 18... Judgment device, 19...
Speech synthesizer, 20...amplifier. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] The welding current when welding a workpiece with an arc welder is detected, the magnitude of this welding current is judged by a judger, this judgment value is modulated into a synthesized sound signal by a voice synthesizer, and the actual welding current is detected. A welding current value recognition method that enables recognition by arc audio.