JPH0550233A - Arc air gouging device - Google Patents

Abstract

PURPOSE:To provide the arc air gouging device without causing a gouging defect even when a flow rate used for arc air gouging is insufficient. CONSTITUTION:In a passage 5 of gouging air, a flow rate sensor 1 for discriminating whether a flow rate of air is lower than a discrimination value set in advance or not, an abnormality display circuit 2 for receiving a signal from its flow rate sensor 1 and displaying an abnormality and an output opening/ closing circuit 3 for opening and closing an output of a main power source part 4, and the main power source part 4 having a quasi-constant voltage characteristic are provided, and in the case the flow rate of gouging air is below the discrimination value, a signal from the flow rate sensor 1 is given to the abnormality display circuit 2 and the output opening/closing circuit 3, an abnormality display is executed, and also, an output is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc air gouging device having a function of displaying an abnormality and stopping output when the flow rate of gouging air is insufficient.

[0002]

2. Description of the Related Art The structure of a conventional arc air gouging device is shown in FIG. In FIG. 2, 4 is a main power source section, 5 is a hose for supplying gouging air, 6 is a gouging torch, 7 is a base material for gouging, and 8 is a carbon electrode. In the conventional air gouging apparatus having such a configuration, the signals from the gouging air source and the main power source section 4 are independently sent to the gouging torch 6 for gouging.

[0003]

When performing gouging using the above-mentioned conventional arc air gouging device, the gouging is performed regardless of the flow rate of the gouging air. Therefore, when the air flow rate is low, the depth of the groove is sufficient. However, even if a gouging processing defect such as that the gouging depth is not constant occurs, there is a problem that you do not notice the processing defect during the work and see the result and notice the processing defect later. Was there.

The present invention is intended to solve the problems of the prior art. When the flow rate of gouging air is reduced, the decrease in gouging air is notified and the output of the main power supply unit is stopped, resulting in processing failure in gouging. It is an object of the present invention to provide an arc air gouging device capable of preventing the occurrence of the occurrence.

[0005]

In order to achieve the above object, the arc air gouging apparatus of the present invention detects the signal when the flow rate of the air in the passage of the gouging air is lower than a preset discriminant value and outputs a signal. A flow rate sensor that outputs, an abnormality display circuit that receives a signal from the flow rate sensor to display an abnormality and an output switching circuit that opens and closes the output of the main power supply section, and a main power supply section with quasi-constant voltage characteristics, When the flow rate of the gouging air is below the determination value, a signal from the flow rate sensor is given to the abnormality display circuit and the output switching circuit to display the abnormality and stop the output.

[0006]

According to the above means, when it is determined that the flow rate of the gouging air has decreased and is lower than the preset determination value, the signal from the flow rate sensor is given to the abnormality display circuit and the output switching circuit to cause an abnormality. Since the output is stopped at the same time as the display, the operator can be immediately notified of the shortage of the gouging air flow rate, and the gouging itself can be stopped, so that the occurrence of machining defects in the gouging can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic structure of an arc air gouging apparatus of the present invention. In FIG. 1, 1 is a flow sensor, 2
Is an abnormality display circuit, 3 is an output switching circuit, 4 is a main power supply unit, 5
Is an air hose, 6 is a gouging torch, 7 is a base material for gouging, 8 is a carbon electrode, and the gouging torch 6 and the base material 7 are connected to the main power source section 4 by a cable. According to the arc air gouging device of the present invention having such a configuration, the flow rate sensor 1 determines that the flow rate of the air supplied to the gouging torch 6 through the air hose 5 is less than a preset determination value. In this case, the signal of the flow rate sensor 1 is sent to the abnormality display circuit 2 and the output switching circuit 3, and the abnormality display circuit 2 displays the abnormality of the insufficient air flow rate, and at the same time, the output switching circuit 3 outputs from the main power supply section 4. To stop gouging.

[0008]

As is apparent from the above embodiment, according to the arc air gouging device of the present invention, when the flow rate of the gouging air is below the preset discriminant value, the abnormality is automatically displayed. Since the output is stopped at the same time, the gouging defect does not occur due to an insufficient air flow rate, and it is possible to easily know the reason why the gouging has stopped due to the error display, and to perform the gouging without defects efficiently. You can

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a main part of an embodiment of an arc air gouging device of the present invention.

FIG. 2 is a circuit diagram of a main part of a conventional arc air gouging device.

[Explanation of symbols]

 1 Flow rate sensor 2 Abnormality display circuit 3 Output switching circuit 4 Main power supply section 5 Air hose (gouging air passage) 6 Gouging torch 7 Base material

Claims (1)

[Claims] 1. A flow sensor for detecting when the flow rate of air in a gouging air passage is lower than a preset determination value and outputting a signal, and an abnormality display circuit for displaying an error in response to a signal from the flow sensor. And an output switching circuit that opens and closes the output of the main power supply, and a main power supply with quasi-constant voltage characteristics.When the flow rate of gouging air falls below the threshold, the signal from the flow sensor is displayed abnormally. An arc air gouging device that gives an error indication to the circuit and the output switching circuit and stops the output.