Head torch for arc welding with non-consumable electrode shielding gas

 

(57) Abstract:

Usage: in the process of production tooling for welding in protective gas in the manufacture of products and designs from ferrous and non-ferrous metals, require a high degree of protection of the weld. To achieve provided by the invention a technical result the burner head for arc welding with non-consumable electrode shielding gas containing the lock with cap for fixing the electrode by means of collets and a ceramic nozzle is further provided with gas protection console, mounted on a ceramic nozzle with optional parallel to the welded surface. Gas protection console made in the form of housing located inside the tube for supplying a gas and a grid, and the collet is aligned holes for supplying gas to the welding zone through the package safety nets installed in a ceramic nozzle and coaxial channels for the threaded part where it attaches to cap for blowing gas to the welding zone through the cap, fitting, a gas-feeding tube and gas protection console. 1 C.p. f-crystals, 5 Il.

The invention relates to industrial equipment welding proizvodstva and structures of ferrous and non-ferrous metals, require a high degree of protection of the weld.

Known head design, comprising a housing with openings for the supply of gas and the cap for attaching the electrode /1/.

The disadvantage of this head is a low degree of gas to protect the weld, reducing the quality of welding.

The most similar in design and the achieved effect to the claimed technical solution is a head torch for arc welding with non-consumable electrode shielding gas containing an associated burner gas protection console with tube for gas supply and the grid /2/.

A disadvantage of the known head is the low quality of the weld due to insufficient gas protection welding zone, which makes it impossible to weld ferrous and non-ferrous metals, including titanium, welding in the wind.

The proposed solution is aimed at creating a head torch for arc welding with non-consumable electrode shielding gas, ensuring a high quality of welding in the wind, including titanium, due to the high efficiency gas protection welding seams.

To achieve a technical result, the burner head for dogovoaraju, made in the form of housing located inside the tube for supplying a gas and a grid, optionally provided with a lock with cap for fixing the electrode through the collet and ceramic nozzle, gas protection console mounted on the ceramic nozzle with optional parallel to the welded surface and the collet is aligned holes for supplying gas to the welding zone through the package safety nets installed in a ceramic nozzle and coaxial channels for the threaded portion of the collet in place, fastening with cap for blowing gas to the welding zone through the cap, fitting, a gas-feeding tube and gas protection console the total area of the holes in the collet and size of the holes in the nozzle are connected by the relation:

,

where SCthe total area of the holes in the collet, m2,

SWthe orifice in the nozzle, m2.

Ceramic nozzle made confused.

When the welding is carried out by the burner head which is made according to the invention, part of the gas from the burner goes to the console. In addition, the STB receives a portion of the protective gas stream, and the console has a side wall that protects the internal space is less than the intensity increase of the gas flow in the nozzle by increasing the speed drifting threads.

Thus, the criterion of "inventive step" is confirmed by the fact that only the claimed set of features of the burner head for arc welding with non-consumable electrode shielding gas provides getting a new technical result of the increased efficiency of the gas protection welding seam to the factor of 1.0 when welding in the wind by creating only the claimed design head of shielding gas flow with a uniform velocity field in the weld zone.

As evidence of industrial applicability of the invention give an example of a specific implementation of the burner head TIG welding GRSM-250.

In Fig. 1 shows a General view of the head; Fig. 2 head, top view; Fig. 3 burner argon-arc welding GRSM-250 head of the proposed design in operating position; Fig.4 plot of the velocity of the shielding gas flow cut ceramic nozzle head of Fig.5 dependence of gas flow "Q" in the burner curve "a" in the prefix curve "b" from the pressure gauge cylinder "P" when

,

where SCthe total area of the holes in the collet,

SWthe orifice fitting.

Declare the head contains (Hsieh for fixing non-consumable, for example, tungsten, electrode 3 through the collet 4 with coaxial holes 5 for the supply of gas to the welding zone through a package of protective nets 6 installed inside confused ceramic nozzle 7, and axial channels 8 on the threaded portion of the collet 5 in the bracket with the cap 2 for blowing gas to the welding zone through the cap 2, the nozzle 9, a gas-feeding tube 10 attached to the fitting 9 and the gas protection console 11 and nuts 12. The total area of the holes 5 of the collet 4 SCassociated with the orifice fitting 9 SWratio , and therefore the aerodynamic resistance of the orifice fitting 9 is greater than the aerodynamic drag of the holes of the collet 4.

Gas protection console 11 is made in the form of a body located inside the tube 13 for the supply of gas and grid 14 and fixed on the ceramic nozzle 7 through the clamp 15 by a screw with a nut 16.

Between the retainer 1 and confused nozzle 7 is installed insulation ring 17 to reduce heat transfer from the heated nozzle 7 on the latch 1, and between the retainer 1 and the cap 2 has a sealing ring 18, excluding the exit gas from the joint surfaces and providing the pressing electrode 3 in the initial period the population of the nozzle 9 of the cap 2 through the sealing ring 18. In the latch 1 (see Fig. 2) with holes 20 and aligned them with the recesses 21, which are lugs 22 chocolatepuma tubes 23 of the burner (see Fig. 3). These grooves are provided for ease of cultivation chocolatepuma tube 23 when changing the welding head, as well as to ensure reliable contact of the clamp 1 with the lugs 22. In Fig. 3 positions 24 and 25 are marked, respectively, the retainer ring 24 of the burner and svarivaemost product.

Burner with welding head of the claimed design works as follows.

Pre-installed departure electrode 3, which when welding titanium should not exceed a value equal to the diameter of the hole ceramic nozzle 7. Then the lugs 22 chocolatepuma tubes 23 are inserted into holes 20 of the retainer 1, and configures the burner by turning the welding head with gas protection console around the lugs 22 at the desired angle in a convenient welder position, which is fixed locking ring 24.

After switching on the supply voltage from the power source and supply of protective gas, such as argon, from a cylinder (not shown) gas chocolateweek tube 23 enters the weld head cevetello through the grid 6 (see Fig. 4) is the alignment of the velocity of the gas stream to a uniform flow at the exit of the nozzle 7. At the same time part of the gas flow passes through the channels 8 of the collet 4, the fitting hole 9, the aerodynamic resistance which is greater than the resistance of the holes 5, and therefore the amount of gas flowing in the gas protection console 11 through tube 10 and 13, less than it is fed into the welding zone, providing uniform cooling of the weld for the nozzle 7 through the grid 14, located parallel to the surface of a welded product.

As can be seen from the graphs of Fig. 5, with increasing gas pressure on the manometer of the container substantially changes the gas flow to the burner (a) and slightly in the console (b). If the ratio of the total area of the holes 5 to the square hole fitting 9 , the difference between the cost of gas to the burner and in the console increases that satisfies the conditions of operation of the burner in the wind.

When replacement of the welding head during the transition to other modes of welding or repair torch welder rotates the locking ring 24 on the 90ofreeing chocolatepuma tube 23, the lugs 22 which extend from mating with the holes 20 of the retainer 1, and the cylinder is removed, the electrode shielding gas provides compared to the prototype of a high degree of gas to protect the weld and, therefore, high quality welded products and structures of ferrous and non-ferrous metals, including titanium, welding in the wind.

1. Head torch for arc welding with non-consumable electrode shielding gas containing gas-feeding tube, gas protection console, made in the form of housing located inside the tube for supplying a gas and a grid, wherein the head is further provided with a clamp with cap for fixing the electrode through the collet and ceramic nozzle, gas protection console mounted on the ceramic nozzle with optional parallel to the welded surface and the collet is aligned holes for supplying gas to the welding zone through the package safety nets installed in ceramic nozzle, and axial channels on the threaded part where it attaches to cap for blowing gas to the welding zone through the cap, fitting, a gas-feeding tube and gas protection console, while the total area of the holes in the collet and size of the holes in the nozzle are connected by the relation

SC/ SW4,

where SCthe total area of the holes in the collet, m2;

SWthe square holes in the charge port of the

 

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