RU18663U1 - CONTACT TIP FOR WELDING TORCH - Google Patents

Abstract

A contact tip for a welding torch, comprising a housing with an axial hole for the welding wire and a core of heat and wear-resistant material installed at the exit of the axial hole, characterized in that the core is made of two rectangular plates of tungsten or hard alloy arranged tangentially to the axial a hole from diametrically opposite sides and parallel to each other.

Description

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Contact tip for welding torch

The utility model relates to welding in carbon dioxide or under a flux layer, namely, to the design of welding contact tips that provide current supply and the direction of the welding wire into the zone of the welding arc (bath).

Known current lead for a welding torch, made in the form of a body with an external thread at one end and an axial hole for the welding wire, the body is made of graphite (see the application "Japan No. 63-72483, class. V23K9 / 26, 02.04.88 g.)

A disadvantage of the known current supply is the low resistance of the graphite body.

A nozzle tip is known, comprising a housing with an axial hole, at the outlet of which there is a tip made of twisted spiral wire copper wire through which the welding wire passes (see ed. Certificate of Czechoslovakia No. 43401, class B23K5 / 00, 06/15/08. )

Copper wire, like graphite, has low resistance, so the known tip is short-lived.

The closest in technical essence is the contact tip for the welding torch, comprising a housing with an axial hole for the welding wire and a core of heat and wear-resistant material installed at the exit of the axial hole (see EPO application No. 0324088, class B23K9 / 28, 9 / 26, 07/19/89).

The described tip is taken as a prototype.

The disadvantage of the prototype, as well as analogues, is the low resistance of the core, as it is made of a copper-chromium alloy.

M. C. B23K9 / 26

welding wire and a core made of heat and wear-resistant material installed at the exit of the axial hole, the core is made of two rectangular plates of tungsten or hard alloy, located tangentially to the axial hole from diametrically opposite sides and parallel to each other.

The inventive tip is characterized by the presence of the following significant distinguishing features:

a) the core is made of two rectangular plates;

b) the plates are made of tungsten or hard alloy;

c) the plates are located tangentially to the axial hole from diametrically opposite sides;

d) the plates are parallel to each other.

Studies on patent and scientific and technical literature have revealed a number of technical solutions for a similar purpose, however, the signs "a ... g are absent in them, therefore, the claimed device meets the criteria of a utility model, and laboratory tests of prototypes of tips give the right to confirm their performance and longer service life by more than 50 times compared to the known ones.

The essence of the claimed is illustrated by drawings, where in FIG. 1 shows a general view of the contact tip; in FIG. 2 is a plan view of FIG. 1; in FIG. 3 is a section along AA in FIG. 2.

The contact tip for the welding torch comprises a housing 1 with an axial hole 2 for the welding wire (not shown in hell) and a core made of tungsten or hard alloy, while the housing 1 is made of copper, which ensures guaranteed electrical contact. The core is installed in the axial hole 2 from the exit side of the welding wire. The core is made of two rectangular plates 3 and 4 located tangentially to the axial hole 2 from diametrically opposite sides and parallel to each other

friend, which provides electrical contact plates 3 and 4 with the welding wire.

The tip works as follows.

The threaded end of the tip is screwed into the mouthpiece (to hell, not shown) of a welding machine or semiautomatic device. The drive for feeding the welding wire, the supply of shielding gas (carbon dioxide), the power of the welding arc is turned on. The welding wire passing through the core (between the plates 3 and 4) is sent to the welding zone (weld pool), in contact with the plates 3 and 4, carrying out the welding process.

Due to the fact that the plates 3 and 4 are made of tungsten or hard alloy, the wear of the hole 2 at the outlet of the housing 1 is very small, therefore, the electrical contact of the wire with the core and its direction are stable, which ensures a high quality weld.

Chief engineer of MP Patent specialist A. Antipin A.V. Chinakhov (

Claims (1)

A contact tip for a welding torch, comprising a housing with an axial hole for the welding wire and a core of heat and wear-resistant material installed at the exit of the axial hole, characterized in that the core is made of two rectangular plates of tungsten or carbide, which are tangent to the axial a hole from diametrically opposite sides and parallel to each other.