JPH0596377A - Torch burnout prevention water circuit - Google Patents

Abstract

PURPOSE:To detect every abnormality in the water circuit and to prevent burning of a torch by locating a water flow rate confirming sensor of the water circuit of cooling water at a final end of the water circuit. CONSTITUTION:The cooling water supplied from a water tank 1 of the cooling water is sent out to a hose 3 for water supply inside an arc welding machine or a plasma cutting machine 10 by a pump 2. This cooling water cools an electrode 5 and a tip 6 on the torch tip through the torch 4. Afterward, the cooling water is again cooled at a radiator 8 through a hose 7 for return water and returns to the water tank 1 through the water flow rate confirming sensor 9. Every abnormality in the water circuit can be surely detected and burning of the torch 4 due to the occurrence of trouble of the water circuit can be prevented by locating the water flow rate confirming sensor 9 of the water circuit of the cooling water at the final end of the water circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water flow rate confirmation sensor for a water circuit used in an arc welder or a plasma cutting machine for cooling electrodes and tips in a torch.

[0002]

2. Description of the Related Art Conventionally, an arc welder which welds a welding base metal by generating an arc between an electrode and a welding base metal, or a constrained arc is generated between an electrode and an object to be cut through a tip. In a plasma cutting machine that melts and cuts an object to be cut by the arc heat, a water circuit having a configuration as shown in FIG. 2 is used to cool the electrodes and chips in the torch.

In FIG. 2, 1 is a water tank, 2 is a pump, 3 is a water supply pump, 4 is a torch having an electrode 5 and a tip 6 at its tip, 7 is a return water hose, 8 is a radiator, and 9 is a radiator. A water flow rate confirmation sensor or a water pressure switch, which constituted the water circuit of 10 arc welders or plasma welders.

The operation of the water circuit will now be described. The cooling water supplied from the water tank 1 is sent to the arc welding machine or plasma cutting machine 10 by the pump 2, and the water flow rate confirmation sensor or the water pressure switch 9 is supplied. Flow through the water supply hose 3 to cool the electrode 5 and the tip 6 at the tip of the torch 4, pass through the return water hose 7, are cooled again by the radiator 8 and then return to the tank 1.

[0005]

However, in the above-described conventional water circuit configuration for the cooling water, some abnormality in the water circuit, for example, foreign matter is blocked in the water passage in the torch or the water flow confirmation sensor is used. However, even if water leaks due to damage to the hose of the water circuit after the start, it is difficult to detect the abnormality.

The present invention solves the above-mentioned conventional problems, and an object thereof is to detect all abnormalities in a water circuit and prevent burnout of a torch.

[0007]

In order to achieve the above-mentioned object, the torch burn-prevention water circuit of the present invention is arc welding in which an arc is generated between an electrode and a welding base metal to weld the welding base metal. Machine, or a plasma cutting machine that cuts the cutting object by melting a cutting arc by generating a constrained arc between the electrode and the cutting object through the tip, and a water circuit that cools the electrode and the tip of the torch And
A sensor for confirming the flow rate of the cooling water is provided at the final end of the water circuit.

[0008]

According to the above structure, since the water flow rate confirmation sensor for the water circuit of the cooling water is provided at the final end of the water circuit, abnormality in every part of the water circuit, such as water leakage or clogging of foreign matter, is prevented. Can be detected, which can be fed back to the output command signal of the welding machine or cutting machine,
It is possible to prevent the torch from burning when the cooling water circuit is abnormal.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a water tank for cooling water, and the cooling water supplied from this tank is located inside 10 arc welders or plasma cutting machines by 2 pumps.
Sent to the water supply hose. This cooling water passes through the torch 4 and cools the electrode 5 and the tip 6 at the tip of the torch. After that, the cooling water passes through the return water hose 7 and is cooled again by the radiator 8 and passes through the water flow rate confirmation sensor 9 to return to the water tank 1.

The water circuit for cooling the torch of the arc welding machine or the plasma cutting machine configured as described above has a water flow rate confirmation sensor at the final end.

[0012]

As is apparent from the above description, according to the present invention, in the arc welding machine or the plasma cutting machine for water cooling the torch, the water flow rate confirmation sensor of the water circuit of the cooling water is disposed at the final end of the water circuit. Since it is located at, it becomes possible to reliably detect all abnormalities in the water circuit that were difficult to detect in the conventional water circuit configuration, and prevent the torch from burning due to the occurrence of trouble in the water circuit. It has become possible.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a water circuit for cooling water for cooling a torch in an arc welding machine or a plasma cutting machine of the present invention.

FIG. 2 is a configuration diagram when a water circuit for cooling water for cooling a torch in a conventional arc welder or plasma cutting machine is used.

[Explanation of symbols]

 1 Water Tank 2 Pump 3 Water Supply Hose 4 Torch 5 Electrode 6 Tip 7 Return Water Hose 8 Radiator 9 Water Flow Confirmation Sensor 10 Arc Welder or Plasma Cutting Machine

Claims (1)

[Claims] 1. An arc welding machine for welding the welding base metal by generating an arc between the electrode and the welding base metal, or a restraining arc through the tip between the electrode and the object to be cut. In a plasma cutting machine that melts and cuts an object to be cut by its arc heat, it has a water circuit for cooling the electrode and tip of the torch, and a sensor for confirming the flow rate of the cooling water Torch burnout prevention water circuit characterized by having at the end.