CN2801366Y - A non-circular cross-section nozzle for narrow-gap non-MIG arc welding torches - Google Patents

Abstract

The utility model belongs to the welding equipment class, purpose-built one kind is used for the non-circular cross-section nozzle of narrow clearance non-consumable electrode gas shielded arc welding welder. The upper end of the nozzle is cylindrical, threads connected with a welding gun are arranged on the inner side of the cylinder, and the cross section of the lower end of the nozzle is in a track-track shape or an oval shape so as to be convenient for deep groove welding. In order to prevent the edge of the nozzle from being too close to the tungsten electrode to affect the gas flow and to prevent arcing between the tungsten electrode and the nozzle, one side of the short axis side of the nozzle is chamfered at an angle to form an open nozzle. The material of the nozzle is ceramic or copper alloy, and the inside and the outside of the nozzle are sprayed with non-conductive ceramic materials. The nozzle can ensure that the edge of the groove is well melted when the narrow-gap deep groove is welded.

Description

A non-circular cross-section nozzle for narrow-gap non-MIG arc welding torches

technical field

The utility model belongs to the category of welding equipment, in particular to a non-circular cross-section nozzle for a narrow-gap non-melting-electrode gas-shielded welding torch, in particular to a welding torch for a narrow-gap non-melting-electrode gas-shielded welding.

Background technique

Non-melting extremely inert gas shielded welding (TIG) is one of the commonly used welding methods in industrial production. Non-melting extremely inert gas shielded welding is composed of welding power supply, inert gas, and welding torch. The welding torch is composed of nozzle, conductive tip, electrode, etc. Clip, non-melting electrode, switch, handle and so on. A reasonable gas shielded welding nozzle, in addition to requiring its reasonable structure and light use, more importantly requires it to provide excellent protection. From a theoretical analysis, the structure of the nozzle should be able to ensure a stable, large-area laminar flow, so as to achieve the best protection effect. Therefore, from the perspective of nozzle structure, any factors that are not conducive to laminar flow should be avoided in design. The quality of the nozzle outlet form is a decisive part to ensure the formation of laminar flow. The common nozzle outlet forms are cylindrical, convergent and diffuse. The cross-sections of these three shapes are all circular.

Although the nozzle protection effect of circular section is good, it is suitable for most welding occasions. However, in the case of non-MIG shielded welding with large thickness and narrow gap, it will encounter the difficulty of further reducing the gap size due to the large nozzle size. In the large-thickness narrow-gap equal-strength welding technology, the size of the welding gap has a certain mathematical relationship with the thickness of the welded plate. If the welding gap cannot meet the requirements, then the equal-strength requirements cannot be met. In addition, the tungsten poles of all existing nozzles are located on the center of the nozzle, which makes it difficult to melt the base metal of the I-shaped groove during narrow gap welding. Therefore, the existing nozzles with circular cross-sections cannot meet the requirements of strong welding techniques such as large thickness and narrow gaps.

Contents of the invention

The purpose of this utility model is to provide a nozzle with a non-circular cross-section, which cooperates with a special non-melting extremely inert gas shielded welding torch to solve the above-mentioned problems.

The purpose of this utility model is achieved like this:

A non-circular cross-section nozzle for a narrow-gap non-melting electrode gas shielded welding torch. The upper end of the nozzle is cylindrical, and the inner side of the cylindrical shape is provided with threads connected with the welding torch. The cross-section of the lower end of the nozzle is track-shaped Or oval, in order to facilitate deep groove welding. In order to prevent the distance between the edge of the nozzle and the tungsten pole from being too close to affect the gas flow, and the arc between the tungsten pole and the nozzle, one side of the short axis of the nozzle is beveled to form an open nozzle. The material of the nozzle is ceramic or copper alloy, which is sprayed with non-conductive ceramic material inside and outside.

The utility model has the advantage that since the open nozzle is in the narrow gap bevel, it does not affect the protection of the gas. And the inclined tungsten electrode can be easily welded to the edge of the I-shaped groove, which ensures that the edge of the groove is well melted when welding the narrow gap and deep groove. The gap between the inclined electrode and the nozzle of the special non-melting inert gas shielded torch is basically consistent, and the arc striking phenomenon caused by the gap between the electrode and the nozzle is prevented.

Description of drawings

Fig. 1 is the structural representation of the utility model

Fig. 2 is a side view of the structure of the utility model

Figure 3 is the A-A view of Figure 2

1-internal thread; 2-cylindrical; 3-track and field; 4-oblique notch

Detailed ways

As shown in Figure 1, the upper end of the nozzle is cylindrical (2), and the inner side of the cylinder is provided with an internal thread (1), which is used for connection with a special non-melting inert gas shielded welding torch. The short axis of the nozzle is provided with an open oblique notch, and the cross section of the front end of the nozzle is track-shaped (3) or elliptical. In order to facilitate deep groove welding. The nozzle is made of ceramic material or copper alloy sprayed ceramic material,

Claims (3)

1. noncircular cross section nozzle that is used for narrow gap non-consumable gas shielded arc welding welding gun; the upper end that it is characterized in that nozzle is column type (2); columniform inboard is provided with the screw thread (1) that is connected with welding gun, and the cross section of the lower end of nozzle is track and field runway shape or ellipse.

2. a kind of noncircular cross section nozzle that is used for narrow gap non-consumable gas shielded arc welding welding gun according to claim 1 is characterized in that the brchypinacoid of nozzle has open oblique breach.

3. a kind of noncircular cross section nozzle that is used for narrow gap non-consumable gas shielded arc welding welding gun according to claim 1 is characterized in that its material is ceramic material or the ceramic coated material of copper alloy.

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