JP2514305Y2 - An arc gouging device that uses a consumable DC welding machine power supply - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc air gouging device using a consumable DC welding machine power supply.

[0002]

2. Description of the Related Art Gouging, particularly arc air gouging in which a carbon arc and compressed air are combined, is performed for the purpose of removing incompletely welded parts and chipping the back of the welded parts.

[0003]

However, since it is used infrequently, an exclusive arc air gouging machine equipped with an expensive DC power source is often not used. Normally, the AC power source is used, but the gouging work is inefficient. Moreover, there is a drawback that the finish is poor. Therefore, the present invention aims to provide a device that can easily adopt the arc air gouging by the above DC power source. In addition, the welding current condition can be adopted as it is for arc air gouging, and in the case of a consumable type, since the torch tip that sends out the metal core wire is an electric conductor, it can be used as it is as a connection terminal They found that they could do it, and completed the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention is an arc air gouging utilizing a power source of a consumable DC welding machine, which is a semi-automatic consumable DC welding machine, an arc air gouging torch, and the consumable DC welding machine. Of the torch tip chip and a coupler for detachably connecting the arc air gouging torch connection terminal, and is taken out to the arc air gouging torch through the torch tip chip of the semi-automatic consumable DC welding machine. The feature is that arc air gouging can be performed with a DC welding current.

[0005]

According to the present invention, according to the present invention, the torch tip of the semi-automatic consumable DC welding machine itself is used as the DC power source side connection terminal without separately providing a current extraction terminal, and the arc air gouging is performed through the coupling. Since it is connected to the power supply connection terminal of the torch, the DC power supply of the semi-automatic consumable DC welding machine can be used as the DC power supply of the arc air gouging, and the gouging can be performed as it is under the welding current condition. The equipment cost can be reduced without the need for a dedicated arc air gauzing machine. In addition, since gouging is a work to be performed on the same member at the same site as a pretreatment process or a posttreatment process for welding, one semi-automatic welding machine is used, and it is possible to perform welding only by replacing the cup link. The combined use of gouging can significantly improve work efficiency.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an explanatory view showing an overall outline of the present invention, and FIG. 2 is a sectional view showing a connection main part. As shown in the figure, a semi-automatic consumable DC welding machine 1 includes a power supply device 10.
Connect the + terminal 11 to the torch 2 and-terminal 1
2 is connected to the base material W, a metal core wire 22 is sent out from the tip 20 of the torch 2 to contact the base material W to generate an arc, and a shield is provided between the gas cup 21 surrounding the tip 20. Argon or carbon dioxide gas is blown as a gas to shield the welded portion. Reference numeral 23 is cooling air, which is supplied for cooling the torch during welding. Usually, the welding is 40V,
It is carried out with a direct current of 400A. On the other hand, 3 is an arc air gouging device, in which a carbon electrode 33 is attached to the holder 30, and air is supplied from the compressor 34 to the holder 30 via the hose 35 so that the air can be jetted in parallel to the outside of the electrode 33. Has become. Therefore, when the engaging portion 32 of the connection terminal 31 is connected to the tip 20 from which the gas cup 21 is removed via the coupler 4, a DC welding current flows through the electrode 33, and arc air gouging can be performed with a DC reverse polarity. Become so. Specifically, the engaging portion 32 has a pin 32a projecting from the middle portion thereof, which is inserted into the first female engaging portion 41 of the coupler 4, and the pin 32a is engaged with the groove 41a of the engaging portion 41. On the other hand, the tip 20 is inserted into the second female engaging portion 42, and the tip 20a of the tip 20 is fixed by the tip 43a of the thumbscrew 43. The butterfly screw 43 is made of an insulating material at the tip portion 20a or the whole so that the current from the tip chip 20 does not leak. Therefore, the above 40V, 400
Arc air gouging is performed with the DC current of A.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an overall outline of the present invention.

FIG. 2 is a cross-sectional view showing a connection main part of FIG.

[Explanation of symbols]

 1 Semi-automatic consumable welding device 10 Welding power supply device 2 Torch 20 Tip tip 3 Arc air gouging 31 Connection terminal 4 Coupler

Claims (1)

(57) [Scope of utility model registration request] 1. A semi-automatic consumable DC welding machine, an arc air gouging torch, a torch tip of the consumable DC welding machine, and a coupler detachably connected to a connecting terminal of the arc air gouging torch. Becomes
Utilizing a consumable DC welding machine power supply characterized in that it is possible to perform arc air gouging with a DC welding current taken out to the arc air gouging torch through the torch tip of the semi-automatic consumable DC welding machine. Ark air gouging device.