SU1428544A1 - Twin-electrode torch - Google Patents

Abstract

The invention relates to a welding technique, namely, to burner devices for welding by an unstable electrode in shielding gases by an arc of indirect effect. The purpose of the invention is to reduce the dimensions of the burner and the flow of protective gas. Placing the electrodes 3 on an axis parallel to the plates 1 and 2, allows plates I and 2 to be mounted closely one to another, and thereby substantially reducing the dimensions of the burner in the transverse direction. Making the casing 10 blind from the end and with a slit on the side eliminates the direct flow of protective gas. The blind end of the casing 10 provides the gas flow support, and the internal volume of the casing serves as a storage chamber. The elimination of gas flow outflow and its backwater, as well as the presence of a storage chamber, makes it possible to reduce the consumption of protective gas. 2 Il, 1 tab. with "(/; with

Description

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The invention relates to welding TJexUKe, namely to devices of torches for welding with non-melting electri-i, in protective gases, by an arc of indirect action.

The purpose of the invention is to reduce the dimensions of the burner and the flow of protective gas.

plates 1 and 2. The protective chamber communicates through a structural gap 16 (between plates 1 and 2 and the casing 10) with a cavity 17 formed in the handle of the burner. The cavity 17 is connected by a channel 18 with a gas supply - a conduit 19.

The handle 11 of the burner is made of

Figure 1 shows a two-electrode - JQ keelectroconductive metal material,

Pa burner, longitudinal incision; in fig. 2 - section AA in FIG. one.

Plates 1 and 2 are used to supply welding current to the electrodes 3 and heat from them, and they are also elements of the burner chamber. The plates are made of electrothermal: material and have a different length. : They are placed parallel close to each other through an insulating gasket 4. In the end part of the plate 1 and in the protrusion of the plate 2, the grooves 5 are used to fasten the electrode holders 6 of the tungsten electrodes 3 with screws 7. Heat removal from the plates 1 and 2 It is made by a cooling system which is formed by channels 8 formed in the plates, which are connected through an opening in the gasket 4 and tubes 9 fixed at the inlet of the channels B with the plates.

The casing 10 serves to provide electrical protection for the plates 1 and 2, as well as being an element of the burner protection chamber. One end of the casing is closed, and the other is fixed on the handle 11 of the burner by means of seals 12. On the side surface of the casing, against the interelectrode gap, a slot 13 is made for accurate flow of protective gas. Glu -

input of the welded product. The casing can be made rectangular or cylindrical, the corresponding shape should be viMeTb burner handle (a burner version with a cylindrical casing is shown). The casing can be easily made of transparent material (for example, from a quartz tube), which provides an unobstructed view of the area welding and greatly facilitates the execution of welding operations.

The burner chamber is formed by the walls of the shell Yu, with a wide edge. 14 of the long plate 2 and the end face 15 of the short plate 1. In the protective chamber against the slot 13 formed in the casing there are electrodes 3 on an axis parallel to

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The casing end creates a gas flow stop, and the casing internal volume from the blind end to the slot (located on the side) serves as a kind of accumulation chamber. Elimination of direct gas outflow and backwater, as well as the presence of the accumulation chamber, reduce the flow of protective gas.

The burner is operational and operates as follows.

The electrodes 3 are mounted in the slots 5 by the electrode holders 6 so that their working cav. arranged coaxially with a gap of 2-4 mm and fixed with screws 7. Then the casing 10 slides over the handle 11 of the burner.

After switching on the supply of protective gas (0.5-2) and connecting the burner to the power supply, the excitation has a rectangular or cylindrical shape (depending on the selected shape of the casing), an axisymmetric channel 18, in which the gas supply pipe 19 is fixed at the inlet to the handle, two grooves for installing the seals 12 and two holes for the water supply pipes 9, which are secured with a handle.

0 Electrode holders 6 are made in the form of copper plates, they are rigidly connected with electrodes 3 made of tungsten rods with a diameter of 0.1-0.5 mm. Electrodes 3 are directed

5 towards each other and installed with a gap of 2-4 mm. For the selected range of welding currents of 0.5–5 A, tungsten rods with a diameter of 0.10– 0.3 mm are used as the electrode – cathode, and 0.4–0.5 mm for the electrode – anode.

Placing the electrodes on an axis parallel to the plates allows the plates to be placed closely to each other and as a result, the torch dimensions are significantly reduced in the transverse direction.

Making the casing deaf from the end and with a slit on the side excludes straight 5

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The casing end creates a gas flow stop, and the casing internal volume from the blind end to the slot (located on the side) serves as a kind of accumulation chamber. Elimination of direct gas outflow and backwater, as well as the presence of the accumulation chamber, reduce the flow of protective gas.

The burner is operational and operates as follows.

The electrodes 3 are mounted in the slots 5 by the electrode holders 6 so that their working cav. arranged coaxially with a gap of 2-4 mm and fixed with screws 7. Then the casing 10 slides over the handle 11 of the burner.

After switching on the supply of protective gas (0.5-2) and connecting the burner to the power source, excitation 311428544

rcjT welding arc oscillator or

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the closure of the arc gap with a graphite pencil. The magnitude of the welding current is set depending on the type of joint and the thickness (diameter m) of the metal being welded. The burner can make end compounds of sheet metals and wire leads. When making an end joint for sheets assembled for welding, they are moved in the slot of the casing (more often, the torch is moved relative to the sheets) so that the edges to be welded are constantly in the zone of action of the arc. The use of a transparent casing allows the operator to observe the formation of the weld. This is of particular importance when performing manual welding, when one rator induces a weld pool after energizing the arc, i.e. forms a single drop of liquid metal for both edges due to their melting. Having formed a welding bath, it is on the way along its length

seam lines. In this case, the speed of movement of the burner is adjusted by the operator so as to ensure the normal formation of the seam.

Welding of wire leads is carried out in a similar way, with the only difference being that immediately after forming a single drop of liquid metal for wires, they are removed from the arc.

begins to move the burner, a drop of liquid metal

The illustrative characteristics of the proposed and known burners are given in the table.

In the proposed burner, argon consumption is significantly reduced and its range of application is expanded. Reducing the size of the burner (including in the transverse direction) allows its use in places difficult to access for welding, and the use of a transparent casing provides the necessary conditions for high-quality welds in manual welding of end connections.

The proposed burner has small dimensions and provides welding of the end connections of parts with a thickness of less than 0 mm, the leads of the radiator element wires and the execution of welding operations in hard-to-reach places.

Claims (1)

Invention Formula A two-electrode torch for arc welding in shielding grooves containing tungsten electrodes installed in flat copper electrode holders, two parallel cooled current-carrying plates, and also a protective chamber, about one liter. so that, in order to reduce the dimensions of the burner and the expenditure of protective gas, it is provided with a casing of a non-electrode material, made with a slot for entering the product to be welded, the current supply plates are made of different lengths are isolated from one another, the protective chamber is formed by the walls of the casing, the wide face of the long plate and the end face of the short plate, and the axes of the electrodes are parallel to the plates. eagle Size ratio in the transverse direction. Range of welding current s, A. 14285W Argon consumption, dm / min Offer 100 0.5-5 01, 5-2 Welding of wire leads of radio elements and end connections of extremely thin metals (0.1 mm) (including in difficult access with places) 6 3 13 Application features 16 17