Novel contact tube for gas shielded welding

Abstract

The utility model discloses a novel contact tube for gas shielded welding, which comprises a welding wire hole and an external thread, the welding wire hole is a variable cross section hole, a wire outlet hole of the welding wire hole is a round hole, a wire inlet hole is a horn hole with a large outside and a small inside, and a spiral hole is arranged between the wire outlet hole and the wire inlet hole; the circular hole is further provided with a spiral groove, the section of the spiral groove is trapezoidal, edges and corners are smooth, and the surface of the contact tube is further provided with a concave-convex structure. The welding wire hole is the variable cross-section spiral hole, the multiple spiral grooves are formed in the wire outlet, welding wires can be guided, it is guaranteed that wire discharging is accurate and does not deflect, and the spiral grooves prevent wire clamping caused by impurity accumulation; according to the utility model, the sharp concave-convex structure at the bottom is tightly connected with the welding gun main body, so that stable transmission of current is ensured; in addition, due to the concave-convex structure arranged on the surface, the contact tube is convenient to disassemble and assemble and beneficial to rapid heat dissipation, and the contact tube is not prone to obvious deformation and can adapt to long-time high-load operation.

Description

Technical Field

[0001] The utility model relates to the field of gas shielded welding equipment, in particular to a conductive nozzle for gas shielded welding. Background Art

[0002] Gas shielded welding is widely used in the industrial field. The conductive nozzle is an important component connecting the welding gun and the welding wire. It is a consumable part of the gas shielded welding gun. The conductive nozzle is made of copper alloy. Its main function is to transmit current from the welding gun to the welding wire. Its performance directly affects the welding quality and efficiency.

[0003] Since welding wire usually has high hardness and is fed through the conductive nozzle at a high speed, the coiled welding wire has its own curvature, which will increase the friction on the inner wall of the conductive nozzle during high-speed wire feeding. The wire outlet of the conductive nozzle is subject to large friction and is prone to wear. In addition, traditional conductive nozzles usually use straight holes, while the welding wire is coiled, and the wire feed line is generally curved, which causes the welding wire to easily deviate from the center line when it is fed out, causing the wire to be skewed, which in turn affects the precise alignment of the weld.

[0004] Due to the continuous wire feeding operation, impurities on the surface of the welding wire, such as copper film slag, are easily accumulated in the inner hole of the conductive nozzle. The accumulation of these impurities will cause wire jamming. Utility Model Content

[0005] The utility model provides a novel conductive nozzle for gas shielded welding, which aims to solve the problems of inaccurate wire outlet of the conductive nozzle, easy slag sticking and wire jamming at the wire outlet hole, loose connection between the conductive nozzle body and the welding gun body, inconvenient disassembly and assembly, and inability to be used continuously for a long time with high load.

[0006] The technical solution of this utility model is as follows:

[0007] A novel conductive nozzle for gas shielded welding comprises a conductive nozzle body with a welding wire hole, wherein the tail of the conductive nozzle body is provided with an external thread, and the conductive nozzle body is characterized in that the welding wire hole is a variable cross-section hole, including a spiral hole, and a front end of the welding wire hole is provided with a plurality of spiral grooves evenly distributed around the circumference, and the cross-section of the spiral groove is trapezoidal with rounded edges and corners; the conductive nozzle body also comprises a sharp concave-convex structure arranged on its tail end face, which is used to achieve a close connection between the conductive nozzle body and the welding gun body.

[0008] As a further improvement, the welding wire hole is composed of a wire inlet hole, a spiral hole and a wire outlet hole starting from the tail end of the conductive nozzle body; the wire inlet hole is a trumpet hole that is larger on the outside and smaller on the inside, the wire outlet hole is a round hole, and the spiral groove is opened on the inner wall of the wire outlet hole.

[0009] As a further improvement, the pointed concave-convex structure includes an annular groove arranged on the bottom surface of the conductive nozzle body, and the cross-section of the annular groove is triangular.

[0010] As a further improvement, the outer surface of the conductive nozzle body is further provided with a concave-convex structure, wherein the concave-convex structure comprises convex rings arranged at intervals, and a plurality of axially opened grooves are distributed on the circumference of the convex rings.

[0011] As a further improvement, the convex ring adjacent to the external thread serves as a locking ring for locking the connection between the conductive tip body and the welding gun body.

[0012] As a further improvement, the front and rear end surfaces of the convex ring are both conical surfaces.

[0013] As a further improvement, the head of the conductive nozzle body is further provided with an arc platform and a rounded corner platform.

[0014] Compared with the prior art, the utility model has the following positive effects:

[0015] The welding wire hole of the utility model is a variable-section spiral hole, which can guide the welding wire and ensure that the wire is accurately discharged without deviation; the wire discharge hole is provided with a plurality of spiral grooves, which can remove impurities such as copper mold slag on the surface of the welding wire and prevent wire jamming caused by accumulation of impurities; the utility model is tightly connected with the welding gun body through the sharp concave-convex structure at the bottom to ensure stable transmission of current; the surface of the utility model is provided with a concave-convex structure, which is convenient for disassembly and assembly, and is also beneficial to heat dissipation. The conductive nozzle is not easy to deform and can adapt to high load and long-term continuous use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the axonometric view of the contact nozzle;

[0017] Figure 2 This is a cross-sectional view of the conductive nozzle.

[0018] In the figure, 1. pointed concave-convex structure, 2. external thread, 3. convex ring, 4. groove, 5. slot, 6. conical surface, 7. locking ring, 8. arc platform, 9. rounded platform, 10. wire entry hole, 11. spiral hole, 12. wire exit hole, 13. spiral groove. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0020] like Figure 1 and Figure 2As shown, a conductive nozzle for gas shielded welding comprises a conductive nozzle body provided with a welding wire hole. The welding wire hole is a variable cross-section hole, which is sequentially provided with a wire inlet hole 10, a spiral hole 11, and a wire outlet hole 12 from the tail end of the conductive nozzle body; the wire outlet hole 12 is a round hole, and the wire inlet hole 10 is a trumpet hole with a larger outside and a smaller inside; the diameters of the two ends of the wire inlet hole 10 are 2.4 mm and 1.4 mm respectively; six spiral grooves 13 are also provided on the wire outlet hole 12, and the cross-section of the spiral groove 13 is trapezoidal, with smooth edges and corners, and the spiral line pitch is 10 mm and the number of turns is 0.5; the spiral hole 11 is spiral, with an aperture of 1.4 mm, and the center line cylindrical surface diameter of the spiral hole 11 is 0.4 mm, the lead is 20 mm, and the number of turns is 2.

[0021] The bottom surface of the conductive tip is also provided with a sharp concave-convex structure 1, which includes an annular groove provided on the bottom surface of the conductive tip, and the cross section of the annular groove is triangular. The sharp concave-convex structure 1 cooperates with the corresponding structure on the welding gun body to achieve a tight connection between the conductive tip body and the welding gun body, and ensure the stable transmission of current between the conductive tip body and the welding gun body.

[0022] The outer surface of the conductive nozzle body is also provided with a concave-convex structure, which includes a plurality of convex rings 3 arranged at intervals, and grooves 4 are formed between the convex rings 3; the front and rear end surfaces of the convex ring 3 are both conical surfaces 6, and the angle between the conical surface 6 and the axis is 65-75 degrees, and the thickness of the convex ring 3 is 0.9-1.1mm; there are a plurality of axially opened slots 5 on the convex ring 3; the concave-convex structure can improve the heat dissipation effect of the conductive nozzle and facilitate disassembly and assembly, and can save copper materials compared with the square table structure of the traditional conductive nozzle; the tail of the conductive nozzle body is provided with an external thread 2 for connecting with the welding gun body, and the locking ring 7 is adjacent to the external thread 2 for locking the connection between the conductive nozzle body and the welding gun body, further ensuring that the conductive nozzle and the welding gun body are tightly connected and not loose.

[0023] The head of the conductive nozzle body is also provided with an arc platform 8 and a rounded corner platform 9, both of which have an arc structure.

[0024] When in use, the conductive tip is connected to the welding gun body so that the sharp concave-convex structure 1 and the locking ring 7 are in contact with the welding gun body, and then the tightening is continued. On the one hand, the sharp concave-convex structure 1 is in close contact with the welding gun body, and on the other hand, the rear end surface (conical surface 6) of the locking ring 7 is elastically deformed. In this way, the conductive tip body and the welding gun body can be tightly connected without loosening or detaching, thereby further ensuring the stable transmission of current between the welding gun body and the conductive tip.

[0025] The welding wire can smoothly enter the conductive nozzle along the trumpet-shaped wire inlet hole 10, and then advance in a spiral along the spiral hole 11. During the advancement process, part of its bending deformation is converted into self-rotation, thereby achieving accurate and non-deflected welding wire output, and the welding wire can be in close contact with the inner wall of the spiral hole 11. Even after long-term use, the inner wall of the spiral hole 11 is worn, but because it is spiral, the welding wire can still be in close contact with the conductive nozzle and can still transmit current stably, which can greatly improve the service life of the conductive nozzle. When the welding wire passes through the wire outlet hole 12, the spiral groove 13 not only guides the welding wire, but also can promptly remove impurities such as copper film slag on the surface of the welding wire to prevent wire jamming caused by impurity accumulation.

[0026] When the welding gun works for a period of time, the temperature of the conductive tip increases. The concave-convex structure formed by the convex ring 3, the groove 4 and the slot 5 is conducive to rapid heat dissipation. The conductive tip is not prone to obvious deformation and can adapt to long-term high-load continuous operation.

[0027] The welding slag generated during the welding process can easily splash onto the conductive nozzle. The arc platform 8 and the rounded corner platform 9 at the tail end of the conductive nozzle both have arc features and are not easy to stick to slag under the blowing of the welding shielding gas sprayed from the welding gun body.

[0028] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A novel conductive nozzle for gas shielded welding, comprising a conductive nozzle body with a welding wire hole, wherein the tail of the conductive nozzle body is provided with an external thread (2), characterized in that: The welding wire hole is a variable cross-section hole, comprising a spiral hole (11), a front end of the welding wire hole being provided with a plurality of spiral grooves (13) evenly distributed around the circumference, the cross-section of the spiral grooves (13) being trapezoidal, with rounded edges and corners; the conductive nozzle body further comprising a sharp concave-convex structure (1) provided on its rear end face, for achieving a tight connection between the conductive nozzle body and the welding gun body.

2. The conductive tip according to claim 1, characterized in that: The welding wire holes are sequentially composed of a wire inlet hole (10), a spiral hole (11) and a wire outlet hole (12) starting from the rear end of the conductive nozzle body; the wire inlet hole (10) is a trumpet hole that is larger on the outside and smaller on the inside, the wire outlet hole (12) is a round hole, and the spiral groove (13) is provided on the inner wall of the wire outlet hole (12).

3. The conductive tip according to claim 1, characterized in that: The pointed concave-convex structure (1) comprises an annular groove arranged on the bottom surface of the conductive nozzle body, and the cross section of the annular groove is triangular.

4. The conductive tip according to claim 1, characterized in that: The outer surface of the conductive nozzle body is also provided with a concave-convex structure, wherein the concave-convex structure comprises convex rings (3) arranged at intervals, and a plurality of axially opened clamping grooves (5) are distributed on the circumference of the convex rings (3).

5. The conductive tip according to claim 4, characterized in that: The convex ring (3) adjacent to the external thread (2) serves as a locking ring (7) for locking the connection between the conductive tip body and the welding gun body.

6. The conductive tip according to claim 4, characterized in that: The front and rear end surfaces of the convex ring (3) are both conical surfaces (6).

7. The conductive tip according to claim 1, characterized in that: The head of the conductive nozzle body is also provided with an arc-shaped platform (8) and a rounded corner platform (9).

Images