CN214161970U

CN214161970U - Convenient fixed metal welding auxiliary device

Info

Publication number: CN214161970U
Application number: CN202023099265.1U
Authority: CN
Inventors: 陆鑫
Original assignee: Suzhou Amit Metal Products Co ltd
Current assignee: Suzhou Amit Metal Products Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-09-10
Anticipated expiration: 2030-12-21

Abstract

The utility model relates to the technical field of welding processing accessories, in particular to a metal welding auxiliary device which is convenient to fix, and can automatically support and fix steel pipes at two ends by mechanical means, thereby effectively reducing the labor intensity of workers; the welding device comprises a bottom plate, four groups of supporting legs, a rotating plate, a sliding plate, a motor and a first air cylinder, wherein the bottom end of the rotating plate is inserted into a rotating groove, a bearing group is arranged between the rotating plate and the rotating groove, an auxiliary bevel gear is fixedly sleeved in the middle of the outer side wall of the rotating plate, a transmission shaft is arranged at the output end of the motor, a main bevel gear is arranged at the right end of the transmission shaft, a first telescopic rod is arranged at the output end of the first air cylinder, and a welding gun is arranged at the upper part of the left side wall of the sliding plate; the cylinder body, the rotating rod, the left moving plate, the right moving plate, the first left supporting rod, the first right supporting rod, the second left supporting rod and the second right supporting rod are further included, a second telescopic rod is arranged at the output end of the second cylinder, and a rack is arranged at the bottom end of the second telescopic rod.

Description

Convenient fixed metal welding auxiliary device

Technical Field

The utility model relates to a technical field of welding process auxiliary device especially relates to a convenient fixed metal welding auxiliary device.

Background

As is well known, a metal welding auxiliary device is an auxiliary device for welding two sections of steel pipes having the same length, and is widely used in the field of welding; the existing metal welding auxiliary device comprises a bottom plate, four groups of supporting legs, a rotating plate, a sliding plate, a motor and a first air cylinder, wherein the four groups of supporting legs are all installed at the bottom end of the bottom plate, a rotating groove is formed in the left side of the top end of the bottom plate, the bottom end of the rotating plate is inserted into the rotating groove, a bearing group is arranged between the rotating groove and the rotating groove, an auxiliary bevel gear is fixedly sleeved in the middle of the outer side wall of the rotating plate, the motor is installed at the left part of the top end of the bottom plate, a transmission shaft is arranged at the output end of the motor, a main bevel gear is arranged at the right end of the transmission shaft, the main bevel gear is meshed with the auxiliary bevel gear, a sliding groove is formed in the right part of the top end of the bottom plate, the bottom end of the sliding plate can be fixed in the sliding groove in a sliding mode, the first air cylinder is installed at the right part of the top end of the bottom plate, a first air cylinder output end is provided with a first telescopic rod, the left end of the first telescopic rod is connected with the lower part of the right end of the sliding plate, and the upper part of the left side wall of the sliding plate is provided with a welding gun; when the conventional metal welding auxiliary device is used, an operator sleeves two sections of steel pipes on the outer side of a fixed column, the outer diameter of the fixed column is slightly smaller than the inner diameter of the two sections of steel pipes, a first telescopic rod is controlled by a first air cylinder to move leftwards and drive a sliding plate to slide leftwards, the sliding plate drives a welding gun to move leftwards, and the lengths of the steel pipes at two ends with welding are the same, so that the welding gun is high enough to weld the position where the steel pipes at two ends are in contact, a motor is electrified and drives a transmission shaft to rotate, the rotation speed of the motor is slow, the transmission shaft drives a main bevel gear to rotate, the main bevel gear drives an auxiliary bevel gear to rotate, the auxiliary bevel gear drives a rotating plate to rotate, the operator holds the steel pipes at two ends, the rotating plate drives the steel pipes at two ends to rotate, and the steel pipes at two ends are welded; present metal welding auxiliary device uses the discovery, carries out the welded in-process to both ends steel pipe, needs the staff to hold up the both ends steel pipe manually for staff's intensity of labour is great, leads to its convenience of use relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an accessible mechanical means props tightly fixedly to the both ends steel pipe automatically, and effectual staff's that alleviates intensity of labour improves the convenient fixed metal welding auxiliary device of convenience in use.

The utility model discloses a metal welding auxiliary device convenient to fix, comprising a base plate, four groups of landing legs, the rotor plate, the slide, motor and first cylinder, four groups of landing legs are all installed in the bottom plate bottom, bottom plate top left side is provided with the rotation groove, the rotor plate bottom insert to the rotation inslot and with rotate between the groove and be provided with the bearing group, rotor plate lateral wall middle part fixed cover is equipped with vice bevel gear, the motor is installed in bottom plate top left part, the motor output end is provided with the transmission shaft, the transmission shaft right-hand member is provided with main bevel gear, main bevel gear and vice bevel gear meshing, bottom plate top right part is provided with the sliding tray, the slide bottom can be slided and fixed in the sliding tray, first cylinder is installed in bottom plate top right part, first cylinder output end is provided with first telescopic link, first telescopic link left end and slide right-hand member sub-unit connection, slide left side wall upper portion is provided with welder; the novel cylinder is characterized by further comprising a cylinder body, a rotating rod, a left moving plate, a right moving plate, a first left supporting rod, a first right supporting rod, a second left supporting rod and a second right supporting rod, wherein an inner cavity is formed inside the cylinder body, openings are formed in the top end and the bottom end of the cylinder body, the bottom end of the cylinder body is connected with the top end of the rotating plate, a cover plate is detachably arranged at the top end of the cylinder body, a second air cylinder is arranged at the bottom end of the cover plate, a second telescopic rod is arranged at the output end of the second air cylinder, a rack is arranged at the bottom end of the second telescopic rod, a left fixing groove and a right fixing groove are respectively formed in the middle of the left side wall and the middle of the inner right side wall of the cylinder body, the left end and the right end of the rotating rod are respectively inserted into the left fixing groove and the right fixing groove, a left external thread and a right external thread with opposite rotating directions are arranged at the left part and the right part of the outer side wall of the rotating rod, a gear ring is fixedly sleeved at the middle of the outer side of the rotating rod, the rack is meshed with the gear ring, the left side movable plate and the right side movable plate are respectively sleeved on the left portion and the right portion outside the rotating rod in a screwing mode, the right end of the first left support rod and the left end of the first right support rod respectively penetrate through the left side wall and the upper portion of the right side wall of the barrel and are respectively connected with the left movable plate and the upper portion of the right movable plate, the right end of the second left support rod and the left end of the second right support rod respectively penetrate through the lower portion of the left side wall of the barrel and the lower portion of the right side wall of the barrel and are respectively connected with the lower portion of the left movable plate and the lower portion of the right movable plate, the left end of the first left support rod and the right end of the first right support rod are respectively provided with the first left arc-shaped plate and the first right arc-shaped plate, and the right end of the second left support rod and the right support rod are respectively provided with the second left arc-shaped plate and the second right arc-shaped plate.

The utility model discloses a convenient fixed metal welding auxiliary device still includes left anchor strut and right anchor strut, left side anchor strut and right anchor strut top all are connected with the apron bottom, left side anchor strut and right anchor strut bottom all are connected with the second cylinder.

The utility model discloses a convenient fixed metal welding auxiliary device still includes the gag lever post, the gag lever post left end pass slide left side wall second region and with sliding tray left side wall connection, the gag lever post right-hand member is connected with sliding tray right side wall.

The utility model discloses a convenient fixed metal welding auxiliary device, first left arc board left side wall and first right arc board right side wall all are provided with first slipmat, second left arc board left side wall and second right arc board right side wall all are provided with the second slipmat.

The utility model discloses a convenient fixed metal welding auxiliary device still includes the mount pad, the mount pad top is connected with the motor bottom, the mount pad bottom is connected with the bottom plate top.

The utility model discloses a convenient fixed metal welding auxiliary device still includes four groups of gyro wheels, four groups of gyro wheels are rotatable the installation in four groups of landing leg bottoms respectively.

The utility model discloses a convenient fixed metal welding auxiliary device, be provided with left ball bearing and right ball bearing between dwang and left fixed slot and the right fixed slot inside wall respectively.

The utility model discloses a convenient fixed metal welding auxiliary device still includes the pull ring, the pull ring bottom is connected with the apron top.

Compared with the prior art, the beneficial effects of the utility model are that: the working personnel sleeve two sections of steel pipes outside the cylinder body, the second telescopic rod is controlled by the second cylinder to move downwards, the second telescopic rod drives the rack to move downwards, the rack drives the gear ring to rotate, the gear ring drives the rotating rod to rotate, the rotating rod can rotate in the left fixing groove and the right fixing groove simultaneously, because the left half area and the right half area of the outer side wall of the rotating rod are respectively provided with external threads with opposite rotating directions, and the left moving plate and the right moving plate are respectively sleeved in the left half area and the right half area outside the rotating rod in a screwing way, when the rotating rod rotates, the left moving plate and the right moving plate move in opposite directions, the left moving plate drives the first left arc-shaped plate and the second left arc-shaped plate to move leftwards, the right moving plate drives the first right arc-shaped plate and the second right arc-shaped plate to move rightwards, the first left arc-shaped plate and the first right arc-shaped plate tightly brace and fix a section of steel pipe above, and the second left arc-shaped plate and the second right arc-shaped plate brace and fix a section of steel pipe below the steel pipe below, first telescopic link through first cylinder control is removed left, first telescopic link drives the slide and slides left, the slide drives welder and removes left, because the length of taking welded both ends steel pipe is the same, make welder highly just can realize welding the position of both ends steel pipe contact, the motor circular telegram, motor drive transmission shaft rotates, motor speed is slower, the transmission shaft drives main bevel gear and rotates, main bevel gear drives vice bevel gear and rotates, vice bevel gear drives the rotor plate and rotates, the rotor plate drives both ends steel pipe and rotates, the realization is to the welding of both ends steel pipe.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

FIG. 4 is an enlarged view of a portion C of FIG. 1;

in the drawings, the reference numbers: 1. a base plate; 2. a support leg; 3. a rotating plate; 4. a slide plate; 5. a motor; 6. a first cylinder; 7. a bearing set; 8. a secondary bevel gear; 9. a drive shaft; 10. a main bevel gear; 11. a first telescopic rod; 12. a welding gun; 13. a barrel; 14. rotating the rod; 15. a left moving plate; 16. a right moving plate; 17. a first left strut; 18. a first right strut; 19. a second left strut; 20. a second right strut; 21. a cover plate; 22. a second cylinder; 23. a second telescopic rod; 24. a rack; 25. a ring gear; 26. a first left arc-shaped plate; 27. a first right arc-shaped plate; 28. a second left arc-shaped plate; 29. a second right arc-shaped plate; 30. a left reinforcement bar; 31. a right reinforcing rod; 32. a limiting rod; 33. a first non-slip mat; 34. a second non-slip mat; 35. a mounting seat; 36. a roller; 37. and (4) a pull ring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in figures 1 to 4, the utility model discloses a metal welding auxiliary device convenient to fix, which comprises a bottom plate 1, four groups of supporting legs 2, a rotating plate 3, a sliding plate 4, a motor 5 and a first air cylinder 6, wherein the four groups of supporting legs 2 are all arranged at the bottom end of the bottom plate 1, a rotating groove is arranged at the left side of the top end of the bottom plate 1, a bearing group 7 is arranged between the rotating groove and the bottom end of the rotating plate 3 is inserted into the rotating groove, a secondary bevel gear 8 is fixedly sleeved at the middle part of the outer side wall of the rotating plate 3, the motor 5 is arranged at the left part of the top end of the bottom plate 1, a transmission shaft 9 is arranged at the output end of the motor 5, a main bevel gear 10 is arranged at the right end of the transmission shaft 9, the main bevel gear 10 is meshed with the secondary bevel gear 8, a sliding groove is arranged at the right part of the top end of the bottom plate 1, the bottom end of the sliding plate 4 can be fixed in the sliding groove in a sliding manner, the first air cylinder 6 is arranged at the right part of the top end of the bottom plate 1, a first telescopic rod 11 is arranged at the output end of the first air cylinder 6, the left end of the first telescopic rod 11 is connected with the lower part of the right end of the sliding plate 4, and the upper part of the left side wall of the sliding plate 4 is provided with a welding gun 12; the novel cylinder comprises a cylinder body 13, a rotating rod 14, a left moving plate 15, a right moving plate 16, a first left support rod 17, a first right support rod 18, a second left support rod 19 and a second right support rod 20, an inner cavity is arranged inside the cylinder body 13, openings are formed in the top end and the bottom end of the cylinder body 13, the bottom end of the cylinder body 13 is connected with the top end of the rotating plate 3, a cover plate 21 is detachably arranged at the top end of the cylinder body, a second air cylinder 22 is arranged at the bottom end of the cover plate 21, a second telescopic rod 23 is arranged at the output end of the second air cylinder 22, a rack 24 is arranged at the bottom end of the second telescopic rod 23, a left fixing groove and a right fixing groove are respectively arranged in the middle of the inner left side wall and the inner right side wall of the cylinder body 13, the left end and the right end of the rotating rod 14 are respectively inserted into the left fixing groove and the right fixing groove, a left external thread and a right external thread with opposite rotation directions are arranged at the left part and the right part of the outer side wall of the rotating rod 14, a gear ring 25 is fixedly sleeved at the middle of the outer side of the rotating rod 14, the rack 24 is meshed with the gear ring 25, the left moving plate 15 and the right moving plate 16 are respectively sleeved at the left part and the right part of the outer side of the rotating rod 14 in a screwing mode, the right end of a first left supporting rod 17 and the left end of a first right supporting rod 18 respectively penetrate through the upper parts of the left side wall and the right side wall of the cylinder body and are respectively connected with the upper parts of the left moving plate 15 and the right moving plate 16, the right end of a second left supporting rod 19 and the left end of a second right supporting rod 20 respectively penetrate through the lower parts of the left side wall and the right side wall of the cylinder body and are respectively connected with the lower parts of the left moving plate 15 and the right moving plate 16, a first left arc-shaped plate 26 and a first right arc-shaped plate 27 are respectively arranged at the left end of the first left supporting rod 17 and the right end of the first right supporting rod 18, and a second left arc-shaped plate 28 and a second right arc-shaped plate 29 are respectively arranged at the left end of the second left supporting rod 19 and the right supporting rod 20; the working personnel sleeve two sections of steel pipes outside the cylinder body, the second telescopic rod is controlled by the second cylinder to move downwards, the second telescopic rod drives the rack to move downwards, the rack drives the gear ring to rotate, the gear ring drives the rotating rod to rotate, the rotating rod can rotate in the left fixing groove and the right fixing groove simultaneously, because the left half area and the right half area of the outer side wall of the rotating rod are respectively provided with external threads with opposite rotating directions, and the left moving plate and the right moving plate are respectively sleeved in the left half area and the right half area outside the rotating rod in a screwing way, when the rotating rod rotates, the left moving plate and the right moving plate move in opposite directions, the left moving plate drives the first left arc-shaped plate and the second left arc-shaped plate to move leftwards, the right moving plate drives the first right arc-shaped plate and the second right arc-shaped plate to move rightwards, the first left arc-shaped plate and the first right arc-shaped plate tightly brace and fix a section of steel pipe above, and the second left arc-shaped plate and the second right arc-shaped plate brace and fix a section of steel pipe below the steel pipe below, first telescopic link through first cylinder control is removed left, first telescopic link drives the slide and slides left, the slide drives welder and removes left, because the length of taking welded both ends steel pipe is the same, make welder highly just can realize welding the position of both ends steel pipe contact, the motor circular telegram, motor drive transmission shaft rotates, motor speed is slower, the transmission shaft drives main bevel gear and rotates, main bevel gear drives vice bevel gear and rotates, vice bevel gear drives the rotor plate and rotates, the rotor plate drives both ends steel pipe and rotates, the realization is to the welding of both ends steel pipe.

The metal welding auxiliary device convenient to fix of the utility model further comprises a left reinforcing rod 30 and a right reinforcing rod 31, the top ends of the left reinforcing rod 30 and the right reinforcing rod 31 are both connected with the bottom end of the cover plate 21, and the bottom ends of the left reinforcing rod 30 and the right reinforcing rod 31 are both connected with the second cylinder 22; left side anchor strut and right anchor strut can support fixedly to the second cylinder, improve the reliability in utilization.

The utility model discloses a convenient fixed metal welding auxiliary device, still include gag lever post 32, the gag lever post 32 left end passes slide 4 left side wall lower half region and is connected with the sliding tray inner left side wall, the gag lever post 32 right-hand member is connected with the sliding tray inner right side wall; the gag lever post can carry on spacingly to the slide, improves the safety in utilization.

The utility model discloses a convenient fixed metal welding auxiliary device, first left arc 26 left side wall and first right arc 27 right side wall all are provided with first slipmat 33, and second left arc 28 left side wall and second right arc 29 right side wall all are provided with second slipmat 34; the first anti-skid pad and the second anti-skid pad can enhance the fixing effect on the two sections of steel pipes, and the use reliability is improved.

The utility model discloses a convenient fixed metal welding auxiliary device, which also comprises a mounting seat 35, wherein the top end of the mounting seat 35 is connected with the bottom end of a motor 5, and the bottom end of the mounting seat 35 is connected with the top end of a bottom plate 1; the mount pad can be fixed the motor, improves stability in use.

The metal welding auxiliary device convenient to fix of the utility model also comprises four groups of rollers 36, wherein the four groups of rollers 36 are respectively rotatably arranged at the bottom ends of the four groups of supporting legs 2; four groups of rollers can be convenient for the staff to remove the device, improve and use the flexibility.

The utility model discloses a convenient fixed metal welding auxiliary device, a left ball bearing and a right ball bearing are respectively arranged between the rotating rod 14 and the inner side walls of the left fixed groove and the right fixed groove; left ball bearing and right ball bearing can reduce the produced frictional resistance when the dwang rotates, improve and use the ride comfort.

The metal welding auxiliary device convenient to fix of the utility model also comprises a pull ring 37, the bottom end of the pull ring 37 is connected with the top end of the cover plate 21; the pull ring can facilitate the opening and closing of the cover plate, and provides convenience in use.

The utility model discloses a convenient fixed metal welding auxiliary device, it is at work, the staff suit two sections steel pipes outside the barrel, through second cylinder control second telescopic link move down, the second telescopic link drives the rack move down, the rack drives the gear ring to rotate, the gear ring drives the dwang to rotate, the dwang can rotate in left fixed slot and right fixed slot simultaneously, because left half region and right half region of dwang lateral wall are provided with the external screw thread of opposite direction of rotation respectively, and left movable plate and right movable plate are respectively screw-mounted and set up in left half region and right half region outside the dwang, when the dwang rotates, left movable plate and right movable plate do the back-to-back motion, left movable plate drives first left arc and second left arc to move left, right movable plate drives first right arc and second right arc to move right, first left arc and first right arc prop up a section steel pipe that is located the top and fix tightly, the second left arc-shaped plate and the second right arc-shaped plate tightly support and fix a section of steel pipe below the second left arc-shaped plate, the first telescopic rod is controlled by the first air cylinder to move leftwards, the first telescopic rod drives the sliding plate to slide leftwards, the sliding plate drives the welding gun to move leftwards, and the lengths of the steel pipes at two ends with welding are the same, so that the welding gun is high enough to weld the position where the steel pipes at two ends contact, the motor is electrified, the motor drives the transmission shaft to rotate, the transmission shaft drives the main bevel gear to rotate, the main bevel gear drives the auxiliary bevel gear to rotate, the auxiliary bevel gear drives the rotating plate to rotate, the rotating plate drives the steel pipes at two ends to rotate, and the steel pipes at two ends are welded; the left reinforcing rod and the right reinforcing rod can support and fix the second cylinder, so that the use reliability is improved; the limiting rod can limit the sliding plate, so that the use safety is improved; the first anti-skid pad and the second anti-skid pad can enhance the fixing effect on the two sections of steel pipes and improve the use reliability; the mounting seat can fix the motor, so that the use stability is improved; the four groups of rollers can facilitate workers to move the device, so that the use flexibility is improved; the left ball bearing and the right ball bearing can reduce the friction resistance generated when the rotating rod rotates, and the use smoothness is improved; the pull ring can facilitate the opening and closing of the cover plate, and provides convenience in use.

The utility model discloses a first cylinder, second cylinder, motor and welder that convenient fixed metal welding auxiliary device used all purchase from the market, only need according to the description install use can.

The utility model discloses a convenient fixed metal welding auxiliary device, above the mounting means, the connected mode or the mode that sets up of all parts are common mechanical system to the concrete structure, model and the coefficient index of its all parts are its from taking the technique, as long as can reach all can implement of its beneficial effect, so do not add at much and give unnecessary detail.

The metal welding auxiliary device convenient to fix of the utility model has the advantages that under the condition that the opposite explanation is not made, the directional terms "up, down, left, right, front, back, inside, and outside, and vertical and horizontal" included in the term merely represent the orientation of the term in the normal use state, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the numerical terms "first," "second," and "third," etc. do not denote any particular quantity or order, but rather are used to distinguish one from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A metal welding auxiliary device convenient to fix comprises a bottom plate (1), four groups of supporting legs (2), a rotating plate (3), a sliding plate (4), a motor (5) and a first air cylinder (6), wherein the four groups of supporting legs (2) are all arranged at the bottom end of the bottom plate (1), a rotating groove is formed in the left side of the top end of the bottom plate (1), the bottom end of the rotating plate (3) is inserted into the rotating groove, a bearing group (7) is arranged between the rotating groove and the rotating groove, an auxiliary bevel gear (8) is fixedly sleeved in the middle of the outer side wall of the rotating plate (3), the motor (5) is arranged at the left part of the top end of the bottom plate (1), a transmission shaft (9) is arranged at the output end of the motor (5), a main bevel gear (10) is arranged at the right end of the transmission shaft (9), the main bevel gear (10) is meshed with the auxiliary bevel gear (8), a sliding groove is formed in the right part of the top end of the bottom plate (1), the sliding plate (4) can be fixed in the sliding groove in a sliding manner, the first cylinder (6) is installed at the right part of the top end of the bottom plate (1), the output end of the first cylinder (6) is provided with a first telescopic rod (11), the left end of the first telescopic rod (11) is connected with the lower part of the right end of the sliding plate (4), and the upper part of the left side wall of the sliding plate (4) is provided with a welding gun (12); the novel multifunctional clothes dryer is characterized by further comprising a barrel body (13), a rotating rod (14), a left moving plate (15), a right moving plate (16), a first left supporting rod (17), a first right supporting rod (18), a second left supporting rod (19) and a second right supporting rod (20), wherein an inner cavity is arranged inside the barrel body (13), openings are formed in the top end and the bottom end of the barrel body (13), the bottom end of the barrel body (13) is connected with the top end of the rotating plate (3), a cover plate (21) is detachably arranged at the top end of the barrel body, a second air cylinder (22) is arranged at the bottom end of the cover plate (21), a second telescopic rod (23) is arranged at the output end of the second air cylinder (22), a rack (24) is arranged at the bottom end of the second telescopic rod (23), a left fixing groove and a right fixing groove are respectively formed in the middle parts of the left side wall and the right side wall inside the barrel body (13), a left end and a right end of the rotating rod (14) are respectively inserted into the left fixing groove and the right fixing groove, dwang (14) lateral wall left part and right part are provided with and revolve to opposite left external screw thread and right external screw thread, the fixed cover in dwang (14) outside middle part is equipped with ring gear (25), rack (24) and ring gear (25) meshing, left side movable plate (15) and right movable plate (16) screw set respectively establish in dwang (14) outside left part and right part, first left branch pole (17) right-hand member and first right branch pole (18) left end pass barrel left side wall and right side wall upper portion respectively and respectively with left movable plate (15) and right movable plate (16) upper portion be connected, second left branch pole (19) right-hand member and second right branch pole (20) left end pass barrel left side wall and right side wall lower part respectively and respectively with left movable plate (15) and right movable plate (16) sub-unit connection, first left branch pole (17) left end and first right branch pole (18) right-hand member are provided with first left arc (26) and first right arc (27) respectively, and the left end of the second left supporting rod (19) and the right end of the second right supporting rod (20) are respectively provided with a second left arc-shaped plate (28) and a second right arc-shaped plate (29).

2. The metal welding auxiliary device convenient for fixing as claimed in claim 1, further comprising a left reinforcing rod (30) and a right reinforcing rod (31), wherein the top ends of the left reinforcing rod (30) and the right reinforcing rod (31) are connected with the bottom end of the cover plate (21), and the bottom ends of the left reinforcing rod (30) and the right reinforcing rod (31) are connected with the second cylinder (22).

3. The metal welding auxiliary device convenient for fixing is characterized by further comprising a limiting rod (32), wherein the left end of the limiting rod (32) penetrates through the lower half area of the left side wall of the sliding plate (4) and is connected with the left side wall in the sliding groove, and the right end of the limiting rod (32) is connected with the right side wall in the sliding groove.

4. The metal welding auxiliary device convenient for fixing according to claim 3, characterized in that the left side wall of the first left arc-shaped plate (26) and the right side wall of the first right arc-shaped plate (27) are provided with first anti-skid pads (33), and the left side wall of the second left arc-shaped plate (28) and the right side wall of the second right arc-shaped plate (29) are provided with second anti-skid pads (34).

5. The metal welding auxiliary device convenient to fix of claim 4 is characterized by further comprising a mounting seat (35), wherein the top end of the mounting seat (35) is connected with the bottom end of the motor (5), and the bottom end of the mounting seat (35) is connected with the top end of the bottom plate (1).

6. A metal welding auxiliary device facilitating fixing according to claim 5, characterized by further comprising four sets of rollers (36), wherein the four sets of rollers (36) are respectively rotatably mounted at the bottom ends of the four sets of legs (2).

7. The metal welding auxiliary device facilitating the fixing as set forth in claim 6, wherein a left ball bearing and a right ball bearing are respectively provided between the rotating lever (14) and the inner side walls of the left fixing groove and the right fixing groove.

8. The metal welding auxiliary device for facilitating the fixing of the claim 7 is characterized in that, it also includes a pull ring (37), the bottom end of the pull ring (37) is connected with the top end of the cover plate (21).