CN220407391U - Automatic welding device for mixed gas protection of large-caliber thick-wall steel pipe structural part consumable electrode - Google Patents

Abstract

The utility model discloses a consumable electrode mixed gas protection automatic welding device for a large-caliber thick-wall steel pipe structural part, which comprises a first motor, a three-jaw chuck, a first bracket, a ball bracket, a second motor, a welding gun, a locking device, a wire guide pipe, a first sliding block, a second sliding block and a second bracket, wherein the first motor is arranged on the first bracket; the two ends of the first bracket are respectively connected with the first motor and the second motor, one end of the three-jaw chuck is connected with the first motor, the two ends of the large-caliber thick-wall steel pipe structural member are respectively fixed through the three-jaw chuck and the chuck, the other end of the chuck is connected with the second motor, the bottom of the ball bracket is arranged on the upper end of the first bracket, the top of the ball bracket is contacted with the large-caliber thick-wall steel pipe structural member, one end of the welding gun is fixed on the first sliding block through the locking device, the other end of the welding gun is connected with the wire guide pipe, the first sliding block is in sliding connection with the second sliding block, and the second sliding block is fixed on the second bracket; the utility model has the advantages that: the welding seam forming quality is good and attractive, the labor intensity is reduced, and the production efficiency is improved.

Description

Automatic welding device for mixed gas protection of large-caliber thick-wall steel pipe structural part consumable electrode

Technical Field

The utility model belongs to the field of welding, and particularly relates to an automatic welding device for a large-caliber thick-wall steel pipe structural member under the protection of mixed gas of a consumable electrode.

Background

At present, with the continuous development of the technology level, new structural members are adopted in the field of aviation, and in the manufacturing of these new structural members, welding technology is an important mode of structural member connection. In general, a large-caliber thick-wall steel pipe is used as a cabin body of a training bomb, which is important for the safety and the practicability of a thick-wall steel pipe structural member. However, the traditional thick-wall steel pipe structural parts are connected by adopting a manual arc welding mode, and the structural parts welded by the method have large deformation, so that the quality of welding seams cannot be ensured; in addition, manual arc welding is a manual operation, and has low welding speed, so that the construction efficiency is low.

Disclosure of Invention

Aiming at the prior art, the utility model aims to overcome the defects in the prior art and adapt to the actual needs, thereby providing the automatic welding device for welding the large-caliber thick-wall steel pipe structural member by adopting an automatic wire feeding mode, changing the welding mode of manual arc welding adopted by the traditional thick-wall steel pipe structural member by using the protective gas during welding, and improving the working efficiency.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the automatic welding device comprises a rotating module and a welding gun module, wherein the rotating module comprises a first motor, a three-jaw chuck, a first bracket, a ball bracket and a second motor, and the welding gun module comprises a welding gun, a locking device, a wire guide tube, a first sliding block, a second sliding block and a second bracket; the first support is equipped with two, two first support parallel arrangement and leave the clearance between, first motor right side lower extreme is connected with two first support one end, the second motor lower extreme card is gone into in the clearance of two first support other ends, three-jaw chuck one end is connected with first motor right side middle part, the fixed heavy-calibre thick wall steel pipe structure one end of three-jaw chuck other end, the heavy-calibre thick wall steel pipe structure other end passes through chuck one end to be fixed, the chuck other end is connected with second motor left side middle part, through the harmonious action of first motor and second motor, can make heavy-calibre thick wall steel pipe structure rotate, the ball support is equipped with at least one, ball support bottom both ends are installed respectively on two first support upper ends, ball support top and heavy-calibre thick wall steel pipe structure contact, welder one end is fixed in on the first slider through locking device, the other end is connected with the wire guide tube, first slider and second slider sliding connection, the second slider is fixed in the second support, and can move relatively second support level, first slider and second slider all are perpendicular setting with the second support.

Further, the first motor and the second motor are controlled to output power through the switch, one end of the three-jaw chuck is connected with the power output end of the first motor, the other end of the chuck is connected with the power output end of the second motor, one end of the welding gun is fixed on the lower end of the first sliding block through the locking device, the other end of the welding gun is connected with the thread guide tube in a threaded mode, the rear end of the first sliding block is connected with the front end of the second sliding block through the built-in sliding rail in a sliding mode, the first sliding block can slide up and down relative to the second sliding block, the rear end of the second sliding block is fixed on the second bracket, the rear end of the second sliding block can slide left and right relative to the second bracket through the built-in sliding rail, the two first brackets are rectangular long-strip-shaped, the two first brackets are fixedly connected through at least one short bracket, the short bracket is transversely arranged between the two first brackets, the gap between the two first brackets is vertically arranged with the two first brackets, the gap between the two first brackets is matched with the shape and the size of the lower end of the second motor, and the total length of the two first brackets are matched with the short brackets.

Further, two short brackets are specifically arranged, and the two short brackets are arranged between the two first brackets in parallel.

Further, the second support is of a concave shape as a whole, the concave opening is arranged towards the rear end of the second slide block, the upper end and the lower end of the second support are respectively provided with a dovetail groove type slide rail, and the second slide block is connected with the dovetail groove type slide rails at the upper end and the lower end of the second support through built-in slide rails at the rear end and can horizontally move in the dovetail groove type slide rails on the second support.

Further, the specific two that are equipped with of ball support all includes ball frame, screw, two ball supports and two balls, ball frame bottom both ends are installed respectively on the upper end of two first supports, two ball supports are located on the both ends at ball frame top, and two ball supports set up relatively, screw passes two ball supports, and two ball supports can reciprocate on screw, through the relative distance between two ball supports of rotatory screw adjustable, two balls are installed respectively in two ball supports and are exposed the ball support terminal surface, the ball can rotate in the ball support, two ball support tops all are installed respectively on the upper end of two first supports through the both ends of ball frame bottom all with heavy-calibre thick wall steel pipe structure bottom contact.

Further, both ball bearings are movably connected with the ball frame.

Further, locking device includes wall built-up, first connecting block, the second is connected, spliced pole and locking screw, locking screw is equipped with two, the wall built-up upper end is equipped with one and is used for the opening of being connected with first slider lower extreme, and the wall built-up can be on first slider lower extreme horizontal slip, and pass first connecting block through one of them locking screw and be fixed in on the first slider lower extreme, first connecting block left side and wall built-up lower extreme welding, second connecting block left side and first connecting block right side welding, and second connecting block perpendicular to first connecting block, spliced pole rear end and second connecting block front end middle part welding, spliced pole upper end middle part is equipped with a logical groove that is used for being connected with welder, another locking screw passes spliced pole front end middle part and welder in proper order and is fixed in locking device with welder.

Further, two stand columns are arranged at the bottom of the second support, the second support is inserted into the ground through the two stand columns and fixed on the ground, and the dovetail groove type sliding rail on the second support is horizontally arranged.

In the utility model, during welding, the welding gun module and the rotating module perform one-time operation on the large-caliber thick-wall steel pipe structural member, the welding gun is fixed on the first sliding block through the locking device and fixedly connected on the second sliding block through the first sliding block, the second sliding block is connected on the bracket through the sliding rail, and when the position needs to be adjusted, the first sliding block and/or the second sliding block can be manually pushed to slide so that the welding gun reaches the position needing to be welded.

The beneficial effects of the utility model are as follows: the automatic welding device for the consumable electrode mixed gas protection of the large-caliber thick-wall steel pipe structural member can realize the welding of the large-caliber thick-wall steel pipe structural member, and the welding process is completed at one time.

Drawings

For the sake of easy clarity of description of the technical solution of the embodiment of the present utility model, the following description will briefly explain the drawings used in this embodiment. The drawings described below are only some embodiments of the present utility model and other drawings may be available to those of ordinary skill in the art based on the drawings.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a side view of the locking device of the present utility model;

FIG. 3 is a front view of the locking device of the present utility model;

fig. 4 is a schematic structural view of the ball support of the present utility model.

Wherein: the device comprises a first motor 11, a first bracket 12, a three-jaw chuck 13, a large-caliber thick-wall steel pipe structural member 14, a ball bracket 15, a spiral screw 151, a ball bracket 152, a ball bracket 153, a ball bracket 154, a 16-chuck and a second motor 17; the welding gun comprises a welding gun body, a 22-locking device, a 23-locking screw, a 24-first sliding block, a 25-wire guide tube, a 26-second sliding block, a 27-second bracket, a 28-short bracket, a 29-upright post, a 30-opening, a 31-wall, a 32-first connecting block, a 33-second connecting block, a 34-connecting post and a 35-through groove.

Description of the embodiments

Embodiments of the present utility model will now be described, fully hereinafter with reference to the accompanying drawings, in which it is shown, by way of illustration, only, and not all embodiments of the utility model. Based on the embodiments of the present utility model, other embodiments obtained by those of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "lateral", "longitudinal", "horizontal", "vertical", "inner", "outer", etc., are directions or positional relationships based on drawings, are merely for convenience of description of the present application and for simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "having," "provided with," "engaged/snapped into," "threaded through," etc., are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

It will be further understood that the terms "comprises," "comprising," "includes," "including" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or include such product, apparatus, process, or method as desired

The method is an inherent element. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …," and the like, does not exclude the presence of other like elements in a product, apparatus, process, or method that includes the element.

Examples

As shown in fig. 1 to 4, the utility model provides a consumable electrode mixed gas shielded automatic welding device for a large-caliber thick-wall steel pipe structural part, which comprises a rotating module and a welding gun module, wherein the rotating module comprises a first motor 11, a three-jaw chuck 13, a first bracket 12, a ball bracket 15 and a second motor 17, and the welding gun module comprises a welding gun 21, a locking device 22, a wire guide pipe 25, a first sliding block 24, a second sliding block 26 and a second bracket 27; the first brackets 12 are provided with two first brackets 12, the two first brackets 12 are arranged in parallel, a gap is reserved between the two first brackets 12, the lower end on the right side of the first motor 11 is connected with one end of the two first brackets 12, the lower end of the second motor 17 is clamped into the gap at the other end of the two first brackets 12, one end of the three-jaw chuck 13 is connected with the middle part on the right side of the first motor 11, the other end of the three-jaw chuck 13 is fixed with one end of the large-caliber thick-wall steel pipe structural member 14, the other end of the large-caliber thick-wall steel pipe structural member 14 is fixed with one end of the chuck 16, the other end of the chuck 16 is connected with the middle part on the left side of the second motor 17, the large-caliber thick-wall steel pipe structural member 14 can rotate through the coordination of the first motor 11 and the second motor 17, at least one ball bracket 15 is arranged, two ends at the bottom of the ball bracket 15 are respectively arranged on the upper ends of the two first brackets 12, the top of the ball bracket 15 is contacted with the large-caliber thick-wall steel pipe structural member 14, a certain supporting effect is realized on the large-caliber thick-wall steel pipe structural member 14, one end of the welding gun 21 is fixed on the first slide block 24 through a locking device 22, the other end of the welding gun 21 is connected with a wire guide wire 25, the large-shaped slide, the first slide block 24 is, the second slide block 26 is connected with the second slide, the second slide block 26 is fixed on the second slide, the second slide bracket 27, the second slide support 27 is fixed on the second slide, and the second bracket 27 can move vertically, and the first bracket 27 and the second bracket 27 and the slide is arranged vertically.

Preferably, the first motor 11 and the second motor 17 are both controlled to output power through a switch, one end of the three-jaw chuck 13 is connected with the power output end of the first motor 11, the other end of the chuck 16 is connected with the power output end of the second motor 17, one end of the welding gun 21 is fixed on the lower end of the first sliding block 24 through a locking device 22, the other end of the welding gun is connected with the thread guide tube 25 in a threaded manner, the rear end of the first sliding block 24 is connected with the front end of the second sliding block 26 in a sliding manner through a built-in sliding rail, the first sliding block 24 can slide up and down relative to the second sliding block 26, the rear end of the second sliding block 26 is fixed on the second bracket 27, the rear end of the second sliding block 26 can slide left and right relative to the second bracket 27 through a built-in sliding rail, the two first brackets 12 are rectangular long-bar-shaped, the two first brackets 12 are fixedly connected through at least one short bracket 28, the short bracket 28 is rectangular short-shaped, the gap between the two first brackets 12 is transversely arranged between the two first brackets 12, is vertically arranged with the two first brackets 12, the gap between the two first brackets 12 is matched with the outline structure of the lower end of the second motor 17, and the total length of the short brackets 28 is matched with the short-length brackets.

Preferably, two short brackets 28 are provided, and two short brackets 28 are parallel to each other and provided between two first brackets 12.

Preferably, the second bracket 27 is in a concave shape as a whole, the concave opening is arranged towards the rear end of the second sliding block 26, the upper end and the lower end of the second bracket 27 are respectively provided with a dovetail groove type sliding rail, and the second sliding block 26 is connected with the dovetail groove type sliding rails at the upper end and the lower end of the second bracket 27 through built-in sliding rails at the rear end and can horizontally move in the dovetail groove type sliding rails on the second bracket 27.

Preferably, the ball support 15 is specifically provided with two ball supports, each of which includes a ball support 153, a screw rod 151, two ball supports 152 and two balls 154, two ends of the bottom of the ball support 153 are respectively mounted on the upper ends of the two first supports 12, the two ball supports 152 are disposed on two ends of the top of the ball support 153, the two ball supports 152 are oppositely disposed, the screw rod 151 passes through the two ball supports 152, the two ball supports 152 can reciprocate on the screw rod 151, the relative distance between the two ball supports 152 can be adjusted by rotating the screw rod 151, the two balls 154 are respectively mounted in the two ball supports 152 and expose end faces of the ball supports 152, the balls 154 can rotate in the ball supports 152, the tops of the two ball supports 15 are respectively contacted with the bottoms of the large-caliber thick-wall steel pipe structural members 14 through the two balls 154, and the bottoms of the two ball supports 15 are respectively mounted on the upper ends of the two first supports 12 through two ends of the ball support 153.

Preferably, both ball bearings 152 are movably coupled to the ball frame 153.

Preferably, the locking device 22 comprises a wall 31, a first connecting block 32, a second connecting block 33, a connecting column 34 and locking screws 23, wherein two locking screws 23 are arranged, an opening 30 for connecting with the lower end of the first sliding block 24 is arranged at the upper end of the wall 31, the wall 31 can horizontally slide on the lower end of the first sliding block 24, the wall 31 is fixed on the lower end of the first sliding block 24 through one locking screw 23 penetrating through the first connecting block 32, the left side of the first connecting block 32 is welded with the lower end of the wall 31, the left side of the second connecting block 33 is welded with the right side of the first connecting block 32, the second connecting block 33 is perpendicular to the first connecting block 32, the rear end of the connecting column 34 is welded with the middle part of the front end of the second connecting block 33, a through groove 35 for connecting with the welding gun 21 is arranged at the middle of the upper end of the connecting column 34, and the other locking screw 23 sequentially penetrates through the middle part of the front end of the connecting column 34 and the welding gun 21 to fix the welding gun 21 on the locking device 22.

Preferably, two upright posts 29 are arranged at the bottom of the second bracket 27, and the two upright posts 29 are inserted into the ground to be fixed on the ground, and dovetail groove type sliding rails on the second bracket 27 are horizontally arranged.

In the utility model, the lower end of a first sliding block 24 is transversely provided with two horizontal sliding grooves for being clamped with an opening 30 at the upper end of a wall 31 of a locking device 22, the two horizontal sliding grooves are vertically distributed, the wall 31 can horizontally slide in the two horizontal sliding grooves at the lower end of the first sliding block 24, a built-in sliding rail at the rear end of the first sliding block 24 is a longitudinal sliding rail which is in sliding connection with the front end of a second sliding block 26, the first sliding block 24 can vertically slide relative to the second sliding block 26, the built-in sliding rail at the rear end of the second sliding block 26 is two grooves which are clamped with dovetail groove type sliding rails at the upper end and the lower end of a second bracket 27, the two grooves are vertically horizontally distributed, and the second sliding block 26 can horizontally move in the dovetail groove type sliding rail on the second bracket 27; one end of the welding gun 21 is clamped into two horizontal sliding grooves at the lower end of the first sliding block 24 through an opening 30 at the upper end of a wall 31 of the locking device 22, and is fixed through a locking screw 23.

The working principle of the utility model is as follows: the welding gun comprises a rotating module and a welding gun module, wherein the rotating module comprises a first motor 11, a first bracket 12, a three-jaw chuck 13, a large-caliber thick-wall steel pipe structural member 14, a screw rod 151, a ball bearing 152, a ball frame 153, balls 154, a chuck 16 and a second motor 17, the power output of the first motor 11 is controlled by a switch, the power output end of the first motor is connected with the three-jaw chuck 13 so as to drive the three-jaw chuck 13 to rotate, the three-jaw chuck 13 is used for fixing the large-caliber thick-wall steel pipe structural member 14 to be welded, the other end of the large-caliber thick-wall steel pipe structural member 14 to be welded is fixed by the chuck 16, the chuck 16 is connected with the power output end of the second motor 17, the bottom of the large-caliber thick-wall steel pipe structural member 14 to be welded is supported by the ball bearing 152, and the ball bearing 152 is fixed on the ball frame 153; the welding gun module comprises a welding gun 21, a locking device 22, a locking screw 23, a first sliding block 24, a wire guide tube 25, a second sliding block 26 and a second bracket 27, wherein the locking device 22 comprises a hanging wall 31, a first connecting block 32, a second connecting block 33, a connecting column 34 and the locking screw 23, after the welding gun 21 and the wire guide tube 25 are well connected through threads, the welding gun 21 is fixed through the locking screw 23 on the locking device 22, the locking device 22 is connected with two horizontal sliding grooves at the lower end of the first sliding block 24 through an opening 30 on the hanging wall 31 and is fixed through the locking screw 23, the first sliding block 24 is connected with the front end of the second sliding block 26 through a longitudinal sliding rail at the rear end, and the second sliding block 26 is connected with dovetail groove type sliding rails at the upper end and the lower end of the second bracket 27 through two grooves at the rear end; two ball frames 153 are arranged on the first bracket 12, ball supports 152 are arranged on the ball frames 153, balls 154 are arranged in the ball supports 152, and the ball supports 152 arranged on each ball frame 153 adjust the relative distance between the two ball supports 152 by adjusting a rotary screw 151, so that large-caliber thick-wall steel pipe structural members 14 with different diameters are supported, and the large-caliber thick-wall steel pipe structural members 14 are lifted or lowered; the welding gun 21 can reach the position where the large-caliber thick-wall steel pipe structural member 14 to be welded needs to be welded through the movement of the first sliding block 24 and the second sliding block 26 connected with the welding gun, so that the welding is finished, and the first sliding block 24 and the second sliding block 26 can finish sliding actions through manual pushing. During welding, the welding gun module is fixed on the second bracket 27, the first motor 11 and the second motor 17 control the large-caliber thick-wall steel pipe structural member 14 to do circular motion in a mode of coordinating power output, and the large-caliber thick-wall steel pipe structural member 14 is subjected to one-time operation under the coordination action of the welding gun module and the rotating module, and in the welding process, (Ar+CO2) series mixed gas is sprayed out through the welding gun 21 in the welding gun module, so that a welding pool is protected.

The foregoing merely illustrates the principles and implementations of specific embodiments of this utility model and is thus useful as a basis for understanding the general principles of the utility model. Other variations in the specific embodiments and applications of the utility model will become apparent to those skilled in the art without departing from the functional and structural principles of the utility model. In summary, the utility model should not be construed as limited to the context of the present specification.

Claims (8)

1. The utility model provides a heavy-calibre thick wall steel pipe structure consumable electrode mixed gas protection automatic welder which characterized in that: the welding gun comprises a rotating module and a welding gun module, wherein the rotating module comprises a first motor, a three-jaw chuck, a first bracket, a ball bracket and a second motor, and the welding gun module comprises a welding gun, a locking device, a wire guide tube, a first sliding block, a second sliding block and a second bracket; the first support is equipped with two, two first support parallel arrangement and leave the clearance between, first motor right side lower extreme is connected with two first support one end, the second motor lower extreme card is gone into in the clearance of two first support other ends, three-jaw chuck one end is connected with first motor right side middle part, the fixed heavy-calibre thick wall steel pipe structure one end of three-jaw chuck other end, the heavy-calibre thick wall steel pipe structure other end passes through chuck one end to be fixed, the chuck other end is connected with second motor left side middle part, through the harmonious action of first motor and second motor, can make heavy-calibre thick wall steel pipe structure rotate, the ball support is equipped with at least one, ball support bottom both ends are installed respectively on two first support upper ends, ball support top and heavy-calibre thick wall steel pipe structure contact, welder one end is fixed in on the first slider through locking device, the other end is connected with the wire guide tube, first slider and second slider sliding connection, the second slider is fixed in the second support, and can move relatively second support level, first slider and second slider all are perpendicular setting with the second support.

2. The automatic welding device for the consumable electrode mixture gas protection of the large-caliber thick-wall steel pipe structural part according to claim 1, wherein the automatic welding device is characterized in that: the first motor and the second motor are all through switch control power take off, three claw chuck one end is connected with the power take off end of first motor, the chuck other end is connected with the power take off end of second motor, welder one end is fixed in on the first slider lower extreme through locking device, the other end and wire guide tube threaded connection, first slider rear end is through built-in slide rail and second slider front end sliding connection, and first slider can slide from top to bottom relative the second slider, the second slider rear end is fixed in on the second support, and the second slider rear end can slide about relative the second support through built-in slide rail, two first supports are rectangular cubic, through at least one short support fixed connection between two first supports, the short support is rectangular short cubic, transversely locate between two first supports, and set up perpendicularly with two first supports, clearance size and second motor lower extreme appearance structure size phase-match between two first supports, and the total length phase-match with the short support.

3. The automatic welding device for the consumable electrode mixture gas protection of the large-caliber thick-wall steel pipe structural part according to claim 2, wherein the automatic welding device is characterized in that: the short support is specifically provided with two, and two short supports are parallel to each other and are arranged between two first supports.

4. The automatic welding device for the consumable electrode mixture gas protection of the large-caliber thick-wall steel pipe structural part according to claim 2, wherein the automatic welding device is characterized in that: the second support is of a concave shape as a whole, the concave opening is arranged towards the rear end of the second slide block, the upper end and the lower end of the second support are respectively provided with a dovetail groove type slide rail, and the second slide block is connected with the dovetail groove type slide rails at the upper end and the lower end of the second support through built-in slide rails at the rear end and can horizontally move in the dovetail groove type slide rails on the second support.

5. The automatic welding device for the consumable electrode mixture gas protection of the large-caliber thick-wall steel pipe structural part according to claim 1, wherein the automatic welding device is characterized in that: the ball support is specific to be equipped with two, all include ball frame, screw, two ball supports and two balls, ball frame bottom both ends are installed respectively on the upper end of two first supports, two ball supports are located on the both ends at ball frame top, and two ball supports set up relatively, screw passes two ball supports, and two ball supports can reciprocate on screw, through the relative distance between two ball supports of rotatory screw adjustable, two balls are installed respectively in two ball supports and are exposed the ball support terminal surface, the ball can rotate in the ball support, two ball support tops all are installed respectively on the upper end of two first supports through the both ends of ball frame bottom contact with heavy-calibre thick wall steel pipe structure.

6. The automatic welding device for the consumable electrode mixture gas protection of the large-caliber thick-wall steel pipe structural part, which is characterized in that: both ball supports are movably connected with the ball frame.

7. The automatic welding device for the consumable electrode mixture gas protection of the large-caliber thick-wall steel pipe structural part according to claim 2, wherein the automatic welding device is characterized in that: the locking device comprises a wall hanging, a first connecting block, a second connecting block, a connecting column and locking screws, wherein the two locking screws are arranged, an opening used for being connected with the lower end of the first sliding block is formed in the upper end of the wall hanging, the wall hanging can horizontally slide on the lower end of the first sliding block, one locking screw penetrates through the first connecting block to be fixed on the lower end of the first sliding block, the left side of the first connecting block is welded with the lower end of the wall hanging, the left side of the second connecting block is welded with the right side of the first connecting block, the second connecting block is perpendicular to the first connecting block, the rear end of the connecting column is welded with the middle part of the front end of the second connecting block, a through groove used for being connected with a welding gun is formed in the middle part of the upper end of the connecting column, and the other locking screw penetrates through the middle part of the front end of the connecting column and the welding gun to fix the welding gun on the locking device.

8. The automatic welding device for the consumable electrode mixture gas protection of the large-caliber thick-wall steel pipe structural part, which is characterized in that: the bottom of the second bracket is provided with two upright posts, the two upright posts are inserted into the ground to be fixed on the ground, and the dovetail groove type sliding rail on the second bracket is horizontally arranged.