阅读说明：本技术 集箱管接头焊接专用焊枪枪颈 (Special welding gun neck for welding header pipe joint ) 是由 张亚奇 刘晨 石越 于 2021-08-06 设计创作，主要内容包括：集箱管接头焊接专用焊枪枪颈,属于焊接技术领域。枪颈管前端为封闭端,枪颈管前端设有中心螺纹孔,导电分流器设置在喷嘴内部,导电分流器后端设有圆柱形凸起,圆柱形凸起与枪颈管的中心螺纹孔螺纹连接,枪颈管前端设置在喷嘴内并与喷嘴内壁的后端螺纹连接；枪颈管由前至后由前段、弯曲段及后段组成,前段长为L1,L1＝10mm,后段长为L2,L2＝160mm,弯曲段半径为r,r＝50mm,弯曲段的角度为α,α＝116.5°,枪颈管外壁直径为D1,D1＝20mm,喷嘴外壁直径为D2,D2＝25mm,喷嘴总长为L3,L3＝50mm。本发明的枪颈管的特殊角度与直径可以使枪颈能够完成密排管子的焊接,焊接过程中既不触碰接管,又不会导致送丝不畅。本发明用于集箱管接头焊接。(A special welding gun neck for welding a header pipe joint belongs to the technical field of welding. The front end of the gun neck tube is a closed end, the front end of the gun neck tube is provided with a central threaded hole, the conductive shunt is arranged inside the nozzle, the rear end of the conductive shunt is provided with a cylindrical bulge, the cylindrical bulge is in threaded connection with the central threaded hole of the gun neck tube, and the front end of the gun neck tube is arranged in the nozzle and in threaded connection with the rear end of the inner wall of the nozzle; the gun neck tube is composed of a front section, a bending section and a rear section from front to back, wherein the front section is L1, L1 is 10mm, the rear section is L2, L2 is 160mm, the radius of the bending section is r, r is 50mm, the angle of the bending section is alpha, alpha is 116.5 degrees, the diameter of the outer wall of the gun neck tube is D1, D1 is 20mm, the diameter of the outer wall of the nozzle is D2, D2 is 25mm, the total length of the nozzle is L3, and L3 is 50 mm. The special angle and the diameter of the gun neck pipe can enable the gun neck to complete the welding of the close-packed pipes, and the gun neck does not touch the connecting pipe in the welding process and can not cause unsmooth wire feeding. The invention is used for welding the header pipe joint.)

1. The utility model provides a special welder gun neck of header pipe joint welding which characterized in that: comprises a conductive shunt (1), a gun neck tube (2) and a nozzle (3); the front end of the gun neck pipe (2) is a closed end, the front end of the gun neck pipe (2) is provided with a central threaded hole, the conductive shunt (1) is arranged inside the nozzle (3), the rear end of the conductive shunt (1) is provided with a cylindrical bulge (1-1), the cylindrical bulge (1-1) is in threaded connection with the central threaded hole of the gun neck pipe (2), and the front end of the gun neck pipe (2) is arranged in the nozzle (3) and is in threaded connection with the rear end of the inner wall of the nozzle (3); the gun neck pipe (2) is composed of a front section (2-1), a bent section (2-2) and a rear section (2-3) from front to back, the length of the front section (2-1) is L1, L1 is 10mm, the length of the rear section (2-3) is L2, L2 is 160mm, the radius of the bent section (2-2) is R, R is 50mm, the angle of the bent section (2-2) is alpha, alpha is 116.5 degrees, the diameter of the outer wall of the gun neck pipe (2) is D1, D1 is 20mm, the diameter of the outer wall of the nozzle (3) is D2, D2 is 25mm, the total length of the nozzle (3) is L3, and L3 is 50 mm.

2. The special welding gun neck for welding the header pipe joint according to claim 1, wherein: the conductive shunt (1) is composed of a cylindrical protrusion (1-1), a cavity (1-2) and a welding wire channel (1-3) which are integrally manufactured from back to front, a shielding gas channel (1-4) communicated with the cavity (1-2) is arranged in the cylindrical protrusion (1-1), the cavity (1-2) is communicated with the welding wire channel (1-3), and a plurality of downward-inclined shunt holes (1-5) are uniformly distributed in the side wall of the cavity (1-2).

Technical Field

The invention belongs to the technical field of welding, and particularly relates to a special welding gun neck for welding a header pipe joint.

Background

Present six industrial robot welder because the gun neck is too thick, bending angle is too little, bending radius reason such as too big, can not realize the unilateral of close packing minor diameter pipe and encircle the welding, take over the diameter: 30-60mm and the net spacing between the outer walls of adjacent tubes is 35-50mm, resulting in the production of such products using only labor behind technology or special machines lacking flexibility. The manual welding efficiency is low, and the manual welding also has certain influence on the body of a welder; the special welding machine has high efficiency and automation degree. But the flexibility is lacked, most of the conditions are that one special machine corresponds to one container type, and multiple types of special welding machines are needed for welding containers of different types.

The difficulty of welding the collector closely-arranged small-diameter connecting pipes by the gun neck of the existing gas shield welding gun has the following aspects:

1. the bending diameter, angle and length of the gooseneck must be proper, and cannot be too large or too small, the welding gun touches the pipe due to too large bending diameter, the wire feeding is not smooth due to too small bending diameter, the angle and the length can be determined through multiple tests, otherwise, the welding gun cannot be surrounded on one side, and the welding gun is damaged;

2. the gooseneck bend and the end part have to be small in diameter so as to freely extend into the clearance of the closely-arranged pipes and strive for space for proper welding posture.

Disclosure of Invention

The invention aims to provide a special welding gun neck for welding a header pipe joint, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a special welding gun neck for welding a header pipe joint comprises a conductive shunt, a gun neck pipe and a nozzle; the front end of the gun neck tube is a closed end, the front end of the gun neck tube is provided with a central threaded hole, the conductive shunt is arranged inside the nozzle, the rear end of the conductive shunt is provided with a cylindrical bulge, the cylindrical bulge is in threaded connection with the central threaded hole of the gun neck tube, and the front end of the gun neck tube is arranged in the nozzle and is in threaded connection with the rear end of the inner wall of the nozzle; the gun neck tube comprises a front section, a bending section and a rear section from front to back, wherein the front section is L1, L1 is 10mm, the rear section is L2, L2 is 160mm, the radius of the bending section is r, r is 50mm, the angle of the bending section is alpha, alpha is 116.5 degrees, the diameter of the outer wall of the gun neck tube is D1, D1 is 20mm, the diameter of the outer wall of the nozzle is D2, D2 is 25mm, the total length of the nozzle is L3, and L3 is 50 mm.

Furthermore, the conductive shunt is composed of a cylindrical protrusion, a cavity and a welding wire channel which are integrally manufactured from back to front, a shielding gas channel communicated with the cavity is arranged in the cylindrical protrusion, the cavity is communicated with the welding wire channel, and a plurality of downward-inclined shunt holes are uniformly distributed in the side wall of the cavity.

Compared with the prior art, the invention has the beneficial effects that:

1. the special angle and the diameter of the gun neck pipe can enable the gun neck to complete the welding of the close-packed pipes, the connecting pipe is not touched in the welding process, and the unsmooth wire feeding cannot be caused.

2. The conductive shunt is designed by combining the conductive nozzle seat, the conductive nozzle and the shunt together, and the shunt hole is arranged obliquely downwards, so that the nozzle position using the welding gun is smaller in size, is more convenient and faster to mount, and is more suitable for welding at a position with insufficient space. The three parts are combined together, so that the effect of a shunt can be achieved, the protective gas can be uniformly sprayed out, the welding seam can be better protected, the effect of a contact tip can be achieved, the welding current is instantly transmitted to the welding wire before the welding wire touches a molten pool, and the guiding of the welding wire is ensured.

3. The special welding gun neck for welding is mainly special for the six-axis industrial robot, and glaze spraying treatment is carried out on the outer side of the conductive shunt to insulate the conductive shunt.

Drawings

FIG. 1 is a front cross-sectional view of a torch neck for a welding gun specifically adapted for use in welding header pipe joints in accordance with the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a front cross-sectional view of a conductive shunt;

fig. 4 is a front view of a conductive shunt.

The names and reference numbers of the components referred to in the above figures are as follows:

the welding wire protection device comprises a conductive shunt 1, a cylindrical protrusion 1-1, a cavity 1-2, a welding wire channel 1-3, a shielding gas channel 1-4, a shunt hole 1-5, a gun neck pipe 2, a front section 2-1, a bent section 2-2, a rear section 2-3 and a nozzle 3.

Detailed Description

The first embodiment is as follows: as shown in fig. 1-4, the present embodiment discloses a welding gun neck special for welding a header pipe joint, which comprises a conductive shunt 1, a neck pipe 2 and a nozzle 3; the front end of the gun neck pipe 2 is a closed end, the front end of the gun neck pipe 2 is provided with a central threaded hole, the conductive shunt 1 is arranged inside the nozzle 3, the rear end of the conductive shunt 1 is provided with a cylindrical bulge 1-1, the cylindrical bulge 1-1 is in threaded connection with the central threaded hole of the gun neck pipe 2, and the front end of the gun neck pipe 2 is arranged in the nozzle 3 and is in threaded connection with the rear end of the inner wall of the nozzle 3; the gun neck tube 2 is composed of a front section 2-1, a bent section 2-2 and a rear section 2-3 from front to back, wherein the length of the front section 2-1 is L1, L1 is 10mm, the length of the rear section 2-3 is L2, L2 is 160mm, the radius of the bent section 2-2 is R, R is 50mm, the angle of the bent section 2-2 is alpha, alpha is 116.5 degrees, the diameter of the outer wall of the gun neck tube 2 is D1, D1 is 20mm, the diameter of the outer wall of the nozzle 3 is D2, D2 is 25mm, the total length of the nozzle 3 is L3, and L3 is 50 mm.

Only with the sizes and the angles, the robot can freely perform welding operation, the welding gun can touch the outer wall of the workpiece pipe, otherwise, the wire feeding is not smooth, and the arc breaking is caused.

Further, as shown in fig. 3 and 4, the conductive shunt 1 is composed of a cylindrical protrusion 1-1, a cavity 1-2 and a welding wire channel 1-3 which are integrally formed from back to front, a shielding gas channel 1-4 communicated with the cavity 1-2 is arranged in the cylindrical protrusion 1-1, the cavity 1-2 is communicated with the welding wire channel 1-3, a plurality of downward-inclined shunting holes 1-5 are uniformly distributed on the side wall of the cavity 1-2 and used for spraying shielding gas, and the shunting holes 1-5 are arranged in a downward-inclined manner, so that the welding effect is good.

The working principle is as follows:

the welding gun is installed on the robot, and the workpiece is welded through robot teaching. The conductive shunt 1 is formed by integrating three parts, so that the structure is smaller, a smaller nozzle 3 is obtained, and the welding gun has larger moving space.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.