Flat protective nozzle of welding gun for carbon dioxide arc welding

Abstract

The utility model belongs to the technical field of welding accessories, and particularly discloses a carbon dioxide arc welding gun flat protection nozzle which comprises a protection nozzle body of an integrated structure, the protection nozzle body is a hollow pipe body, the two ends of the protection nozzle body are open, and the protection nozzle body comprises a nozzle part and a connecting part. The nozzle part is a pipe body with the opening end gradually changing from an oval shape to a round shape, the connecting part is a cylindrical pipe body, the round end of the nozzle part is connected with one end of the connecting part, a limiting groove is formed in the connecting position of the nozzle part and the connecting part, and the limiting groove is located in the peripheral wall of the protection nozzle body. The protection nozzle can carry out welding operation with a wider range and a larger welding operation angle under the conditions that the angle of a groove is smaller and the wall thickness of a steel column is larger, meanwhile, larger gas output can be guaranteed, and a welding wire with a larger diameter is used, so that the welding quality is guaranteed. And the situation that a larger groove is formed in the component for welding is avoided, and the using amount of welding wires on site is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding accessories, in particular to a flat shielding nozzle of a carbon dioxide gas shielded welding gun. Background Art

[0002] At present, steel structure construction technology is widely used in my country's buildings because steel structure has the characteristics of light weight, high strength, convenient and fast construction.

[0003] In the construction of steel structures, thick plate welding has always been a key process, and it is a key process where failures often occur. During the welding construction process, defects such as unfused welds often occur, requiring frequent rework, resulting in a large amount of manpower, material resources, and construction time losses.

[0004] On-site transverse seam welding is mostly performed using CO2 gas shielded welding. However, the shield nozzles used in most welding guns are standard cylindrical, approximately 24.5mm in diameter and 90mm in length. Furthermore, due to the limited length of the welding wire that can extend beyond the nozzle, when welding thick steel columns with narrow groove angles, the welding wire cannot penetrate the transverse seam. Furthermore, the working angle of the welded component is narrow, which affects the quality of the weld pool and leads to defects such as unfused welds. Existing small welding gun shield nozzles, due to the limited maximum gas output, cannot be used with larger diameter welding wires, making weld quality difficult to guarantee. Utility Model Content

[0005] The purpose of the utility model is to provide a flat shielding nozzle of a carbon dioxide gas shielded welding gun to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flat shielding nozzle of a carbon dioxide gas shielded welding gun, comprising a shielding nozzle body of an integrated structure, wherein the shielding nozzle body is a hollow tube body with openings at both ends of the shielding nozzle body, and the shielding nozzle body comprises a nozzle portion and a connecting portion, wherein the nozzle portion is a tube body with an open end that gradually changes from an elliptical shape to a circular shape, and the connecting portion is a cylindrical tube body, and the circular end of the nozzle portion is connected to one end of the connecting portion, and a limit groove is provided at the connection between the nozzle portion and the connecting portion, and the limit groove is located on the outer peripheral wall of the shielding nozzle body.

[0007] Preferably, the limiting groove is an arc-shaped groove.

[0008] Preferably, the connecting portion of the protective nozzle body is provided with a connection to a welding gun.

[0009] Preferably, the elliptical port of the nozzle portion of the protective nozzle body is a gas outlet end for leading out the welding wire.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The flat shield nozzle of the CO2 gas shielded welding gun designed in this utility model can perform welding operations with a wider range and a larger welding working angle when the groove angle is small and the wall thickness of the transverse seam component is large;

[0012] 2. It avoids the need to open a larger groove for welding the transverse weld of the component, thus reducing the amount of welding wire used;

[0013] 3. Improve the welding qualification rate of small angle groove welds;

[0014] 4. Due to the use of less welding wire, the welding time is shortened, the work efficiency is improved, and the heat generated by welding is also reduced, which reduces the generation of weld stress;

[0015] 5. When welding small-angle groove welds, it can ensure greater gas output and thus use larger diameter welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the front view of the utility model;

[0017] Figure 2 This is a side view of the utility model;

[0018] Figure 3 This is a top view of the utility model;

[0019] Figure 4 This is a bottom view of the utility model;

[0020] Figure 5 This is a schematic comparison diagram of the range of the utility model and the ordinary protective nozzle during small angle welding;

[0021] Figure 6 This is a schematic comparison diagram of the molten pool formed by the utility model and the common protective nozzle during small angle welding;

[0022] Figure 7 This is a comparison chart of the welding wire diameters used by the utility model and ordinary shield nozzles during small-angle welding.

[0023] In the figure: 10, nozzle body; 11, connecting part; 12, nozzle part; 13, limiting groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] See also Figure 1-4 The utility model provides a technical solution: a flat shielding nozzle of a carbon dioxide gas shielded welding gun, comprising a shielding nozzle body 10 of an integrated structure, wherein the shielding nozzle body 10 is a hollow tube body with openings at both ends thereof, and the shielding nozzle body 10 comprises a nozzle portion 12 and a connecting portion 11, wherein the nozzle portion 12 is a tube body with an open end gradually changing from an elliptical shape to a circular shape, and the connecting portion 11 is a cylindrical tube body, and the circular end of the nozzle portion 12 is connected to one end of the connecting portion 11, and a limiting groove 13 is provided at the connection between the nozzle portion 12 and the connecting portion 11, and the limiting groove 13 is located on the outer peripheral wall of the shielding nozzle body 10.

[0028] Furthermore, the limiting groove 13 is an arc-shaped groove.

[0029] Furthermore, the connection portion 11 of the protective nozzle body 10 is provided for connection with a welding gun.

[0030] Furthermore, the elliptical port of the nozzle portion 12 of the protective nozzle body 10 is a gas outlet end for leading out the welding wire.

[0031] See Figure 5When welding, the nozzle part of the protective nozzle body of the present invention is placed between the steel column walls to be welded, and the flat end of the nozzle part is placed corresponding to the groove. At this time, the length of the welding operation range is a. In contrast, for ordinary protective nozzles, at the same angle, the length of the welding operation range is b. Obviously, the length of b is smaller than the length of a. Therefore, for welding operations at the same angle, the flat protective nozzle of the present invention has a wider welding range. Correspondingly, it can be seen that the present invention can perform welding at smaller angles.

[0032] See Figure 6 and Figure 7 The utility model can form a deeper molten pool because the nozzle of the flat shield nozzle can ensure a larger gas output, and it is convenient to use a larger diameter welding wire. In contrast, the ordinary shield nozzle is easy to form a shallow pool and a biased pool under small angle conditions, and it is also impossible to use a larger diameter welding wire under small angle conditions, which cannot meet the welding requirements.

[0033] To sum up, the flat protective nozzle designed by the utility model in the process of transverse seam welding can perform welding operations with a wider range and a larger welding working angle when the groove angle is small and the wall thickness of the steel column is large. At the same time, it can ensure a larger gas output and thus use a larger diameter welding wire, thereby ensuring welding quality, avoiding the need to open a larger groove for welding on the component, and reducing the amount of welding wire used on site.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flat shield nozzle for a carbon dioxide gas shielded welding gun, characterized by: The invention comprises a protective nozzle body (10) of an integrated structure, wherein the protective nozzle body (10) is a hollow tube body, and both ends of the protective nozzle body (10) are open. The protective nozzle body (10) comprises a nozzle part (12) and a connecting part (11), wherein the nozzle part (12) is a tube body with an open end that is elliptical and gradually changes to a circular shape, and the connecting part (11) is a cylindrical tube body, wherein the circular end of the nozzle part (12) is connected to one end of the connecting part (11), and a limiting groove (13) is provided at the connection between the nozzle part (12) and the connecting part (11), and the limiting groove (13) is located on the outer peripheral wall of the protective nozzle body (10).

2. The flat shield nozzle of a carbon dioxide gas shielded welding gun according to claim 1, characterized in that: The limiting groove (13) is an arc-shaped groove.

3. The flat shield nozzle of a carbon dioxide gas shielded welding gun according to claim 1, characterized in that: The connection portion (11) of the protective nozzle body (10) is provided for connection with a welding gun.

4. The flat shield nozzle of a carbon dioxide gas shielded welding gun according to claim 1, characterized in that: The elliptical port of the nozzle portion (12) of the protective nozzle body (10) is a gas outlet end for leading out the welding wire.

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