CN220943621U - Circular seam welding device for small container - Google Patents

Abstract

The utility model provides a circular seam welding device of a small container, which comprises a frame, a lifting module, a turnover module, a CCD visual positioning module, a welding module and a gas protection module, wherein the welding module comprises a welding gun and a moving part for driving the welding gun to move, and the moving part drives the welding gun to move and weld a welding seam; the gas protection module comprises a movable beam, a rotary arm and a gas protection cover; lifting up the work piece to CCD vision positioning module, CCD vision positioning module carries out the position monitoring to the welding seam of work piece, after the work piece fine setting is accomplished, remove Liang Shen and advance inside the work piece, the swinging boom rotates and makes gas protection device be located under the welding seam, gas protection cover expansion and welding seam laminating, moving part drive welder removes simultaneously and welds the welding seam, after the welding of one side is accomplished, gas protection cover shrink and swinging boom gyration, the removal arm shifts out the work piece, lifting module removes the work piece to the upset module, the upset module overturns the work piece, carry out the welding of second side.

Description

Circular seam welding device for small container

Technical Field

The application relates to the technical field of welding, in particular to a girth welding device for a small container.

Background

The manual double-sided welding is adopted before the girth welding of the small container, the manual welding workload is large, the labor intensity is high, particularly, when the back surface welding is performed, operators are required to drill the container for welding, potential safety hazards exist in the operation in a limited space, the welding working environment in the tank is bad, the welding quality is poor, and the production efficiency is low. Later use robot welding, but the auxiliary time when robot welds is long to arc light and the welding cigarette that the welding produced seriously influence the automatic tracking system of robot, finally lead to welding seam welding to beat, welding seam distortion, welding seam perforation etc. weld defect, follow-up repair welding work load is big, influences welding quality and production efficiency.

Disclosure of Invention

The utility model aims to provide a girth welding device for a small container.

In order to achieve the above purpose, the utility model provides a girth welding device of a small container, which comprises a frame for bearing each module;

The lifting module is arranged on the frame and drives the workpiece to move up and down;

the overturning module is arranged on the rack and used for overturning the workpiece;

The CCD visual positioning module is arranged on the rack and used for positioning the welding line;

the welding module comprises a welding gun and a moving part for driving the welding gun to move, and the moving part drives the welding gun to move and continuously welds a welding line;

The gas protection module comprises a movable beam, an expandable or contractible rotating arm and a gas protection cover which can be expanded or contracted;

Lifting up the work piece to CCD vision positioning module, CCD vision positioning module carries out the position monitoring to the welding seam of work piece, after the work piece fine setting is accomplished, remove Liang Shen and advance inside the work piece, swinging boom and gas protection cover expand and rise, gas protection cover and welding seam laminating, moving part drive welder removes simultaneously and welds the welding seam, after the welding of one side is accomplished, gas protection cover and swinging boom shrink, the removal arm shifts out the work piece, lifting module removes the work piece to the upset module, the upset module overturns the work piece, carry out the welding of second side.

Further specifically, a rotary cylinder is arranged on the rotary arm, a connecting arm for connecting the gas protection cover and the rotary cylinder is arranged on the rotary arm, the rotary cylinder drives the connecting arm to move, and the connecting arm pulls the gas protection cover to expand or contract.

Further specifically, the rotating arm is rotatably connected with the movable beam through a rotating lug.

Further specifically, an arc voltage tracking system is arranged on one side of the welding gun.

Further specifically, two welding guns are arranged, and the two welding guns respectively weld different welding seams.

Further specifically, the CCD visual positioning module comprises a visual part arranged on the frame, a positioning piece for positioning the welding line and a fine adjustment part for adjusting the workpiece.

Further specifically, the visual part comprises a camera seat arranged at two sides of the frame and a positioning camera arranged on the camera seat, and the positioning piece is arranged on the camera seat.

Further specifically, the lifting module comprises a power part, a lifting part driven by the power part and a roller frame capable of moving up and down, a workpiece is placed on the roller frame, and the lifting part is driven by the power part and drives the roller frame to move up and down.

Further specifically, the turnover module comprises a rotary member arranged on the frame and clamping jaws connected with the rotary member, the clamping jaws clamp a workpiece, and the rotary member operates to turn the workpiece.

Further specifically, a pushing cylinder is arranged on the frame and connected with the rotating member, and the pushing cylinder drives the clamping jaw to axially move.

The beneficial effects of the utility model are as follows: the lifting module is arranged to drive the workpiece to move, so that welding and overturning are facilitated; the turnover device is arranged to turn over the workpiece, so that welding seams on four sides of the workpiece can be welded; the CCD visual positioning device is arranged to position and monitor the welding seam, so that the workpiece is convenient to finely adjust, the moving path of the welding gun and the welding seam are on the same straight line, and the welding of the welding seam is ensured; the welding gun is driven to move through the moving part, and the welding seam is continuously welded; the gas protection device is arranged, the movable beam, the rotary arm and the gas protection cover are all attached, the workpiece is convenient to stretch into, after the workpiece stretches into, the rotary arm rotates to be unfolded and lifted on the same vertical surface with the welding line, the gas protection cover is synchronously opened and lifted to be attached to the welding line, and the gas protection device can effectively protect the welding line during welding.

Drawings

Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings, and it should be understood that the embodiments described below are only for explaining the present application, and do not limit the scope of the present application, wherein:

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

FIG. 2 is a schematic side elevational view of the present utility model;

FIG. 3 is a schematic diagram of the flip module of the present utility model;

FIG. 4 is a schematic diagram of the structure of the CCD visual positioning module of the present utility model;

FIG. 5 is a schematic view of the structure of the positioning member in the CCD visual positioning module of the present utility model;

FIG. 6 is a schematic view of the structure of the welding module of the present utility model;

FIG. 7 is a schematic view of the gas shield apparatus of the present utility model as it enters a workpiece;

FIG. 8 is a schematic view of the gas shield apparatus of the present utility model after entering a workpiece;

FIG. 9 is a schematic view of the structure of the gas protection device of the present utility model when the gas protection cover is not opened;

Fig. 10 is a schematic view of the gas shield apparatus of the present utility model in a configuration when opened.

In the figure: 1. a frame; 11. a fixed beam; 2. a lifting module; 21. a first drive wheel; 22. a second driving wheel; 23. a first chain; 24. a second chain; 241. a tensioning structure; 251. a first driven wheel; 252. a second driven wheel; 26. a lifting wheel; 27. lifting the chain; 271. an elastic seat; 28. a tensioning seat; 29. a roller frame; 20. positioning a cylinder; 3. a turnover module; 31. a pushing cylinder; 32. a rotating member; 33. a clamping jaw; 331. a roller; 34. a guide sleeve; 4. a CCD visual positioning module; 41. a first cross beam; 42. a camera mount; 43. positioning a camera; 44. a positioning piece; 45. an electric pull rod; 5. a welding module; 51. a welding gun; 52. an arc voltage tracking system; 53. welding a camera; 54. a push rod; 55. a driving motor; 56. a moving slide plate; 57. moving the slide rail; 58. a second cross beam; 6. a gas protection module; 61. a moving beam; 62. a rotating arm; 63. a gas shield; 64. a rotary cylinder; 65. and a connecting arm.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

The circular seam welding device for the small container comprises a frame 1 for carrying the modules, a lifting module 2 for driving a workpiece to move up and down, a turnover module 3 for turning over the workpiece, a CCD visual positioning module 4 for monitoring and adjusting welding seams, a welding module 5 for welding the welding seams and a gas protection module 6 for protecting the welding seams, as shown in fig. 1-10.

The frame 1 is placed in a factory building, and the frame 1 is arranged into a rectangular frame.

The lifting module 2 comprises a power part, a lifting part driven by the power part and a roller frame 29 capable of moving up and down, a workpiece is placed on the roller frame 29, and the lifting part is driven by the power part and drives the roller frame 29 to move up and down.

The power part comprises a first driving wheel 21, a driving motor for driving the first driving wheel 21, a second driving wheel 22 meshed with the first driving wheel 21 for rotation, a first driving wheel coaxially arranged with the first driving wheel 21, a second driving wheel coaxially arranged with the second driving wheel 22, a third driving wheel coaxially connected with the first driving wheel through a first chain 23, a fourth driving wheel coaxially arranged with the second driving wheel through a second chain 24, a first driven wheel 251 coaxially arranged with the third driving wheel, a second driven wheel 252 coaxially arranged with the fourth driving wheel, a first driving wheel 251 connected with the first driven wheel 251, a second driving wheel connected with the second driven wheel 252, a third driven wheel arranged on the first driving wheel and far from the first driven wheel 251, a fourth driven wheel arranged on the second driving wheel and far from the second driven wheel 252, a fifth driving wheel coaxially arranged with the third driving wheel and a sixth driving wheel coaxially arranged with the fourth driving wheel, and the gears and the motors are arranged on two sides of the frame 1 in order not to influence the workpiece.

The first driving wheel 21 rotates to drive the second driving wheel 22 to rotate, and the rotation directions of the first driving wheel 21 and the second driving wheel 22 are opposite, so that the roller frame 29 is lifted.

In order to prevent the first chain 23 and/or the second chain 24 from being loosened during continuous use, the transmission function cannot be well achieved, and therefore, the first chain 23 and the second chain 24 are provided with the chain tensioning structure 241, which can be used for tensioning the chain when the chain is loosened, so that the transmission reliability is ensured.

To ensure reliable position during subsequent welding of the weld, the workpiece is roughly positioned when the workpiece is placed on the roller frame 29; a positioning cylinder 20 is provided at one end of the roller frame 29 and the workpiece is moved over the roller frame 29 until it comes into contact with the positioning cylinder 20 indicating that the workpiece is moved into position. The roller frame 29 comprises a bracket and a plurality of rolling shafts arranged on the bracket, wherein the rolling shafts are uniformly and parallelly arranged on the bracket, and the rotation direction of the rolling shafts is the same as the movement direction of the workpiece. And flexible parts are arranged on the peripheral surface of the rolling shaft, so that the workpiece is prevented from being worn and scratched on the rolling shaft.

The lifting part comprises a tensioning seat 28 arranged on the frame 1, a lifting wheel 26 arranged on the tensioning seat 28, a lifting chain 27 for connecting the lifting wheel 26 and the driven wheel and an elastic seat 271 arranged on the lifting chain 27, and the roller frame 29 is connected with the elastic seat 271. The first driven wheel 251 is connected with the first driven wheel through a first lifting chain, the second driven wheel 252 is connected with the second lifting wheel through a second lifting chain, the third driven wheel is connected with the third lifting wheel through a third lifting chain, the fourth driven wheel is connected with the fourth lifting wheel through a fourth lifting chain, an elastic seat 271 is arranged on each lifting chain 27, four corners of the roller frame 29 are connected through the elastic seats 271, and the stable action of the roller frame 29 is ensured. The workpiece is arranged on the roller frame 29, and because the roller frame 29 is provided with the elastic seat 271, when the roller frame 29 is lifted in place, the workpiece and the cross beam cannot generate rigid collision, the workpiece is prevented from being extruded and deformed, and the subsequent welding effect cannot be influenced. The elastic seat 271 is a buffer device with a spring inside, so that an elastic flexible connection is formed between the roller frame 29 and the chain 27. After the workpiece rises in place, the workpiece is pressed under the beam due to the spring force of the elastic seat 271; meanwhile, when the workpiece needs fine adjustment, the driving motor only needs to overcome the spring force.

The first driving wheel 21 and the second driving wheel 22 are driven by the driving motor to rotate, so as to drive the first driving wheel and the second driving wheel to rotate, synchronously drive the first transmission shaft and the second transmission shaft to rotate, synchronously drive all the driven wheels to rotate, synchronously drive all the lifting chains 27 to rotate, and drive the roller frame 29 to move up and down.

An in-place sensor and a reset sensor are arranged on the frame 1, the in-place sensor indicates that the roller frame 29 rises to the in-place state when detecting the roller frame 29, the driving motor stops running, the roller frame 29 stops moving, and even if a tiny moving distance exists, the lifting chain 27 is ensured not to break due to a spring in the elastic seat 271; when the reset sensor detects the roller frame 29, namely the roller frame 29 is reset, the driving motor stops rotating. The in-place sensor and the reset sensor are both arranged as position sensors.

The turnover module 3 comprises a fixed beam 11 arranged on the frame 1, a pushing cylinder 31 arranged on the fixed beam 11, a rotary member 32 connected with the pushing cylinder 31, and a clamping jaw 33 connected with the rotary member 32, wherein the clamping jaw 33 clamps a workpiece, and the rotary member 32 operates to turn the workpiece. The pushing cylinder 31 passes through the fixed beam 11 and is connected with the rotating member 32, and the pushing cylinder 31 operates to push the rotating member 32 to move and synchronously drive the clamping jaw 33 to move towards one side close to or far away from the workpiece.

In order to prevent the clamping jaw 33 from shaking when the pushing cylinder 31 pushes the clamping jaw 33 to move, a guide shaft sleeve 34 is arranged on the fixed beam 11, a guide column is arranged in the guide shaft sleeve 34 and can axially move in the guide shaft sleeve 34, the moving direction of the guide column is parallel to the driving direction of the pushing cylinder 31, the guide column penetrates through the fixed beam 11 and is connected with the rotating member 32, when the pushing cylinder 31 drives the clamping jaw 33 to move, the guide column moves along with the movement to guide the movement of the clamping jaw 33, and the guide shaft sleeve 34 is arranged according to the requirement, in the scheme, the guide shaft sleeve 34 is provided with two guide shafts.

A connecting piece is arranged between the pushing cylinder 31 and the rotating piece 32, a limiting piece is arranged on the connecting piece, and when the clamping jaw 33 rotates to a position for completing workpiece overturning, the limiting piece prevents the clamping jaw 33 from rotating further, so that the workpiece can be overturned reliably.

To ensure reliable clamping of the workpiece, the clamping jaw 33 is provided with 4 jaws, and one end of each jaw, which is close to the workpiece, is provided with a roller 331. The number of the claws is automatically set according to the requirement.

When the clamping jaw 33 grabs one end of a workpiece, the other end is in a suspended state, and the falling or the reverse rotation of the workpiece is possibly unsuccessful, so that a supporting seat is arranged on one side, opposite to the clamping jaw 33, of the frame 1, a moving rod is arranged on the supporting seat, a bearing rotary wheel set is arranged at the end, close to the workpiece, of the moving rod, the moving rod can move on the supporting seat, the bearing rotary wheel set can be in contact with the workpiece, and the clamping jaw 33 is assisted to overturn the workpiece. After the clamping jaw 33 clamps the workpiece, the moving rod is driven to move to the side close to the workpiece, the supporting rotary wheel set is in protruding contact with the opening of the workpiece, when the rotary member 32 drives the clamping jaw 33 to rotate, the opening of the workpiece protrudes on the supporting rotary wheel set to rotate, so that the workpiece rotates, after the workpiece rotates, the moving rod moves to the side far away from the workpiece, and the clamping jaw 33 releases the workpiece.

The CCD visual positioning module 4 comprises a visual part arranged on the frame 1, a positioning piece 44 for positioning a welding line and a fine adjustment part for adjusting a workpiece; the vision portion identifies the weld, and after the weld is aligned with the positioning member 44, the welding gun 51 is aligned with the weld; if there is a deviation between the weld and the positioning member 44, the fine adjustment portion adjusts the workpiece.

The visual part comprises a first beam 41 arranged at the top of the frame 1, camera bases 42 arranged at two sides of the first beam 41, and positioning cameras 43 arranged on the camera bases 42, wherein the two positioning cameras 43 and the welding gun 51 are in the same vertical plane. The two positioning cameras 43 identify the welding seam and the positional relationship between the welding seam and the positioning member 44, and when the welding seam is aligned with the positioning member 44, it is indicated that the welding seam is in the same straight line with the welding gun 51, and the welding gun 51 can be operated to perform the welding process. A display screen is connected to the positioning camera 43, and an operator can observe the positional relationship between the weld and the positioning member 44 in real time through the display screen and operate the fine adjustment unit to adjust the position.

The positioning member 44 is configured as an M-plate, and the welding gun 51 is aligned with the weld when the weld is aligned with the center of the M-plate.

The top of frame 1 sets up the fine setting portion, the fine setting portion sets up to electronic pull rod 45, electronic pull rod 45 with first crossbeam 41 parallel arrangement be provided with the correction pole on the electronic pull rod 45, the correction pole contacts with the work piece, the correction pole removes and corrects the fine setting to the work piece for the welding seam aligns or is parallel with the line of aligning with the locating part 44.

The welding module 5 comprises a moving part arranged on the first beam 41, a welding gun 51 arranged on the moving part, and an arc voltage tracking system 52 connected with the welding gun 51, wherein the connecting line of the welding gun 51 and the quasi-center of the positioning piece 44 is on the same vertical plane, the moving part drives the welding gun 51 to move and continuously weld the welding seam, and in an automatic welding state, the arc voltage tracking system 52 can constantly detect the voltage between the tungsten needle of the welding gun 51 and the welding seam, so that the distance between the tungsten needle and the welding seam is automatically adjusted, and the voltage between the tungsten needle and the welding seam is always kept unchanged. The arc voltage tracking system 52 can ensure that the welding seam is formed uniformly and attractive, effectively improves the welding quality, does not need manual real-time observation and fine adjustment, and reduces the labor intensity of operators. One side of welder 51 is provided with welding camera 53, welding camera 53 transmits the welding picture to the display screen in real time, because there is probably little distance difference between welder 51 and the welding seam before welding, adjusts the accurate location of welder 51 and welding seam before welding and the real-time monitoring function of welding seam when welding according to the picture of display screen, guarantees apparent welding auxiliary effect, can effectively improve welding quality and welding efficiency.

The moving part comprises a moving slide rail 57 arranged on the first cross beam 41, a moving slide plate 56 arranged on the moving slide rail 57 and a driving motor 55 for driving the moving slide plate 56 to move, the welding gun 51 and the arc voltage tracking system 52 are both arranged on the moving slide plate 56, the driving motor 55 drives the moving slide plate 56 to move on the moving slide rail 57 to drive the welding gun 51 to weld a welding seam of a workpiece, and the moving track of the welding gun 51 and the welding seam are in the same straight line.

Because two welding seams need to be welded on a workpiece, a second cross beam 58 is further arranged at the top of the frame 1, the second cross beam 58 is arranged in parallel with the first cross beam 41, the distance between the welding gun 51 driven on the first cross beam 41 and the welding gun 51 driven on the second cross beam 58 is equal to the distance between the two welding seams on the same side of the workpiece, a welding module 5 is also arranged on the second cross beam 58, the two welding guns 51 simultaneously weld the two welding seams, the welding time is further greatly shortened, and the welding efficiency is greatly improved. Because the distance between the welding seams at the two sides of the workpiece cannot be changed, connecting rods are arranged on the first beam 41 and the second beam 58, when the welding gun 51 on the first beam 41 or the second beam 58 is aligned with the welding seam, the welding gun 51 on the second beam 58 or the first beam 41 is also aligned with the welding seam, the first beam 41 or the second beam 58 is connected with a pushing rod 54, the pushing rod 54 is driven to move on the frame 1, and when the welding seam is parallel to the connecting line of the alignment center of the positioning piece 44, the first beam 41 and the second beam 58 are pushed, so that the alignment center of the positioning piece 44 is aligned with the welding seam, and the welding gun 51 is ensured to be aligned with the welding seam.

The gas protection module 6 includes a moving beam 61, a rotating arm 62 rotatably connected to the moving beam 61, and a gas protection cover 63 rotatably connected to the rotating arm 62.

The movable beam 61 can move to one side close to or far away from a workpiece on the frame 1, a sliding rail is arranged on the frame 1, a sliding plate is arranged on the movable beam 61 and connected with a lifting cylinder, and the lifting cylinder drives the sliding plate to move up and down along the sliding rail and synchronously drives the movable beam 61 to move up and down.

The rotating arm 62 is arranged at the end part of the moving beam 61, which is close to the workpiece, and the rotating arm 62 is connected with the moving beam 61 through a turnover lug, so that the rotating arm 62 can rotate towards the direction, which is close to or far away from the moving beam 61, and the rotating angle between the rotating arm 62 and the moving beam 61 is 0-90 degrees. Two states are formed in the process of rotating the rotating arm 62, including a first state and a second state; in the first state, the rotating arm 62 is attached to the moving beam 61; in the second state, the rotating arm 62 is on the same plane as the weld, so that the gas protection cover 63 is opened and can be on the same plane as the weld. A rotary cylinder 64 is arranged on the rotary arm 62, a connecting arm 65 is connected with the rotary cylinder 64, one end of each connecting arm 65 is connected with the rotary cylinder 64, the other end of each connecting arm is respectively connected with two parts of the gas protection cover 63, the gas protection cover 63 is provided with a first part and a second part, the end parts of the two parts of the gas protection cover 63, which are close to each other, are rotatably connected with the connecting arm 65, the rotary cylinder 64 drives the connecting arm 65 to expand or contract the gas protection cover 63, and two states are formed in the rotating process of the gas protection device, namely a third state and a fourth state; in the third state, the gas-protecting device is attached to the connecting arm 65; in the fourth state, the gas protection device is attached to the welding line, and possibly is located below the whole welding line, and the movable arm is driven to move in the direction approaching to the welding line by driving the lifting cylinder.

The gas protection cover 63 is also arranged on the outer side of the workpiece, the gas protection cover 63 on the outer side is arranged on the movable slide plate 56 and moves along with the welding gun 51 to protect an external welding line, the gas protection cover 63 in the inner side is the same as the welding line in length, and is fixed when the welding gun 51 welds, and argon gas blowing protection is continuously carried out on the welding line. The argon filled in the gas protection cover 63 can effectively isolate the welding seam from air, has a cooling function, and can ensure that the welding seam is not oxidized and full and glossy. The welding process (single-sided welding double-sided forming) which can realize external welding and internal forming can be realized, and the welding efficiency is greatly improved. In addition, manual drilling and welding in the tank are not needed, so that the labor intensity of operators is greatly reduced, and the potential safety hazard of operation in a limited space is eliminated.

After the gas shield 63 is opened, a bonding cylinder is provided to the frame 1 so as to bond the gas shield to the weld, and the bonding cylinder is connected to the moving beam 61 to drive the gas shield 6 to move up and down as a whole. The laminating cylinder is connected with the relief pressure valve, prevents that laminating cylinder force from being too big, crushes the gas protection device 6 when going up and down.

The girth welding method of the small container is as follows:

Placing the workpiece on the roller frame 29, when the workpiece contacts the positioning air cylinder 20, indicating that the workpiece moves in place in the moving direction of the workpiece, driving the air cylinder to drive the clamping jaw 33 to move to the side close to the workpiece, pushing the workpiece to move to the side far away from the clamping jaw 33, when the workpiece is not pushed, indicating that the workpiece moves in place in the moving direction of the clamping jaw 33, driving the air cylinder 31 to drive the whole turnover mechanism to shrink and reset, driving the lifting chain 27 to rotate by the operation of the power part, synchronously driving the roller frame 29 to move upwards, and stopping the operation of the driving motor and stopping the movement of the roller frame 29 after the in-place sensor detects the roller frame 29; the positioning camera 43 recognizes the position relationship between the welding line and the positioning piece 44, the correction rod is operated to finely adjust the workpiece, and after the welding line is aligned with the alignment center of the positioning piece 44 or is parallel to the connecting line of the welding line and the alignment center, the first beam 41 and the second beam 58 are driven to move, so that the alignment center of the welding line and the positioning piece 44 is ensured; then, after the welding gun 51 is accurately aligned with the welding seam through a welding camera, the moving beam 61 stretches into the workpiece, the rotating arm 62 is unfolded and positioned below the welding seam, then the gas protection cover 63 is unfolded, and then the moving beam 61 is driven to move upwards, so that the gas protection cover 63 is attached to the welding seam; finally, the welding gun 51 and the gas protection cover 63 are started to weld the welding seam on one side of the workpiece, after the welding seam on one side is welded, the gas protection cover 63 and the rotating arm 62 are contracted, the moving beam 61 moves out of the workpiece, the roller frame 29 drives the workpiece to move downwards to reach the position of the turnover module 3, the clamping jaw 33 clamps the workpiece, the rotating member 32 drives the clamping jaw 33 to rotate to turn the workpiece, the roller frame 29 moves the workpiece to the position of the welding module 5 again to weld, and the rest welding seams on the workpiece are welded repeatedly.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The utility model provides a small-size container's girth welding set which characterized in that: comprises the following steps of

A frame (1) for carrying the modules;

The lifting module (2) is arranged on the frame (1) and drives the workpiece to move up and down;

The overturning module (3) is arranged on the frame (1) and used for overturning the workpiece;

The CCD visual positioning module (4) is arranged on the frame (1) and used for positioning the welding line;

The welding module (5) comprises a welding gun (51) and a moving part for driving the welding gun (51) to move, and the moving part drives the welding gun (51) to move and weld a weld;

A gas protection module (6) comprising a movable beam (61), an expandable or contractible rotary arm (62), and an expandable or contractible gas protection cover (63);

After the moving beam (61) stretches into the workpiece, the rotating arm (62) and the gas protection cover (63) are unfolded, and the gas protection cover (63) is attached to the welding seam to protect the welding seam; when the moving beam (61) extends out of the workpiece, the rotating arm (62) and the gas shield (63) contract.

2. The girth welding apparatus for small sized container according to claim 1, wherein: the rotary arm (62) is provided with a rotary cylinder (64), a connecting arm (65) for connecting the gas protection cover (63) and the rotary cylinder (64), the rotary cylinder (64) drives the connecting arm (65) to move, and the connecting arm (65) pulls the gas protection cover (63) to expand or contract.

3. The girth welding apparatus for small sized container according to claim 1, wherein: the rotating arm (62) is rotatably connected with the moving beam (61) through a rotating lug.

4. The girth welding apparatus for small sized container according to claim 1, wherein: an arc voltage tracking system (52) is arranged on one side of the welding gun (51).

5. The girth welding apparatus for small sized container according to claim 1, wherein: two welding guns (51) are arranged, and the two welding guns (51) are used for respectively welding different welding seams.

6. The girth welding apparatus for small sized container according to claim 1, wherein: the CCD visual positioning module (4) comprises a visual part arranged on the frame (1), a positioning piece (44) arranged on one side of the visual part and a fine adjustment part for adjusting a workpiece.

7. The girth welding apparatus for small sized container according to claim 6, wherein: the visual part comprises a camera base (42) arranged on two sides of the frame (1), and a positioning camera (43) arranged on the camera base (42), and the positioning piece (44) is arranged on the camera base (42).

8. The girth welding apparatus for small sized container according to claim 1, wherein: the lifting module (2) comprises a power part, a lifting part driven by the power part and a roller frame (29) capable of moving up and down, a workpiece is placed on the roller frame (29), and the lifting part is driven by the power part and drives the roller frame (29) to move up and down.

9. The girth welding apparatus for small sized container according to claim 1, wherein: the turnover module (3) comprises a rotary member (32) arranged on the frame (1) and a clamping jaw (33) connected with the rotary member (32), wherein the clamping jaw (33) clamps a workpiece, and the rotary member (32) operates to turn the workpiece.

10. The girth welding apparatus for small sized container according to claim 9, wherein: a pushing cylinder (31) is arranged on the frame (1), the pushing cylinder (31) is connected with a rotating member (32), and the pushing cylinder (31) drives a clamping jaw (33) to axially move.