SU1063558A1 - Torch for gas-shielded arc welding - Google Patents

Abstract

1. BURNER FOR ARG WELDING IN PROTECTIVE GASES WITH A SECONOM of emissions from the welding zone, containing an internal nozzle for supplying protective gas and an external nozzle for sucking emissions from the welding zone, characterized in that, in order to improve the quality of welds and the efficiency of suction of gas and dust emissions the welding zone by means of aerodynamic stability of the flow of protective and exhaust gases, the burner is equipped with a swirler installed in the nozzle for the suction of emissions from the welding zone with the possibility of relative displacement in occurrence .. burner axis (A to C of 00 ate O1

Description

2. Burner according to claim 1, characterized in that the swirler is made with inclined blades, and on the inner surface of the nozzle

, for supplying the protective gas, screw grooves are made, the direction of twisting of KOTOPUJF is opposite to the direction of inclination of the blades of the avihlitel.

one

The invention relates to welding, in particular, to electric arc welding with a melting electrode in shielding gases, and can be used in various industries in semi-automatic welding.

The known torch for arc welding, containing a nozzle, a current-carrying mouthpiece inside it, as well as channels for supplying a protective gas, made in the form of the helical grooves fl on the surface of the current-conducting mouthpiece and on the surface of the nozzle head.

A disadvantage of the design is the lack of means for removing the generated welding spray from the arc zone.

The closest to the technical essence and the achieved effect to the proposed is a gas-shielded arc welding torch with suction of emissions from the welding zone, containing an internal nozzle for supplying protective gas and an external suction nozzle for suction of emissions from the welding zone 2.

The known burner is characterized by insufficient suction of emissions from the zone, as well as the possibility of disrupting the protection of the arc zone by the flow of protective gas due to the insufficient aerodynamic stability of the progressed and suction gas flows, which leads to a decrease in the quality of welds.

The purpose of the invention is to improve the quality of welds and the efficiency of suction of gas and dust emissions from the welding zone by increasing the aerodynamic stability of the flow of protective and removable gases.

This goal is achieved by the fact that a gas-shielded gas-arc welding torch with a suction of emissions from the welding zone, containing an internal nozzle for supplying protective gas and an external nozzle for suction of emissions from the welding zone, is equipped with a swirler installed in the nozzle for suction of emissions from the welding zone with the possibility of relative movement in the direction of the axis of the burner.

In addition, the swirler is made with inclined blades, and screw grooves are made on the inner surface of the nozzle for the supply of protective gas, the direction of which is twisted opposite to the direction of inclination of the blades of the swirler.

Fig, 1 shows the proposed burner, a general view; in fig. 2, section A-A in FIG. 1} in FIG. Figure 3 shows the direction of movement of the gas flow and the outgassing.

The torch consists of a conductive tube 1, at the end of which a candle 2 is placed and a current-carrying tip 3 with a channel 4 for supplying welding wire.

The candle 2 is provided with windows 5 for supplying the protective gas to the welding zone through the channel 6 formed by the outer surfaces of the candle 2 and the tip 3 and the inner surface of the nozzle 7 for supplying the protective gas fitted on the candle 2 through the insulating sleeve 8,

To tighten the flow of shielding gas, screw grooves 9 are made on the inner surface of the nozzle 7. Concentric to the nozzle 7, a nozzle 10 is installed to suck emissions from the welding zone, the inner surface of which forms an annular channel 11 with the outer surface of the nozzle 7 to remove dust and gas emissions generated during welding

In the annular channel 11 a swirler 12 is placed, consisting, for example, of blades 13 inclined at a certain angle to the axis of the burner. The angle of inclination of the blades 13 ensures that the flow of dust and gas emissions is twisted in the direction opposite to that of the flow of protective gas, since the direction of inclination of the blades 13 is opposite to the direction of twisting of the screw grooves 9,

To ensure axial movement, the swirler 12 is enclosed in a sleeve 14 connected by a threaded connection with the nozzle 7. This allows its position to be adjusted when changing the offset of the welding wire.

The burner works as follows.

In the process of welding, a stream of protection is fed through channel 5 through windows 5.

Claims (2)

1. BURNER FOR ARC WELDING IN PROTECTIVE GASES with suction of discharge from the weld zone, containing an internal nozzle for supplying a protective gas and an external nozzle for suction of discharge from the weld zone, characterized in that, in order to improve the quality of welds and the efficiency of suction of dust extraction from the zone welding by increasing the aerodynamic stability of the flows of protective and exhaust gases, the burner is equipped with a swirler installed in the nozzle for suction of precipitates from the welding zone with the possibility of relative movement in the direction of burners., ί SU .1063558> ♦ 2. Burner according to π. 1, characterized in that the swirl is made with inclined blades, and screw grooves are made on the inner surface of the nozzle for supplying protective gas, the direction of rotation of which is opposite to the direction. the inclination of the blades of the edger.