CN211804339U

CN211804339U - Automatic welding device

Info

Publication number: CN211804339U
Application number: CN201922387279.4U
Authority: CN
Inventors: 陈增光
Original assignee: Ningbo Xinzhou Resistance Welder Co ltd
Current assignee: Ningbo Xinzhou Resistance Welder Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-10-30
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses an automatic welding device, including the frame, be equipped with in the frame: the welding mechanism comprises an upper welding head tool and a lower welding head tool, wherein the upper welding head tool is provided with an upper welding head, the lower welding head tool is provided with a lower welding head, and the upper welding head and the lower welding head are respectively connected to the positive pole and the negative pole of a welding part transformer; the workpiece feeding mechanism is used for conveying the workpieces to be welded to the position right below the upper welding head one by one; the welding part feeding mechanism is used for conveying the welding parts to be positioned above the lower welding head one by one; the driving mechanism is used for driving the lower welding head to move towards the upper welding head until the welding part is in contact conduction with the workpiece to generate welding arc so as to realize welding fixation; and the controller is electrically connected with the welding mechanism, the workpiece feeding mechanism, the welding part feeding mechanism and the driving mechanism, so that the automatic control of the welding process is realized. The utility model discloses a welding set, welding accuracy is high, and is efficient, with low costs.

Description

Automatic welding device

Technical Field

The utility model belongs to the technical field of the welding equipment technique and specifically relates to an automatic welding device.

Background

As shown in fig. 1, a valve joint 100 in the prior art includes a tubular connector 100.1 and a valve block 100.2, a valve core 101 is disposed at the bottom of an inner cavity of the tubular connector 100.1, and since the valve core 101 has a small outer diameter and is a tubular body with a through hole, the valve core 101 is difficult to machine and form at one time and has a high cost, in an actual production process, the valve core 101 is usually connected to the bottom of the inner cavity of the tubular connector 100.1 in a later stage by welding to form the complete valve joint 100. In practical application, although the shape and structure of the tubular connector 100.1 are consistent, the valve block 100.2 has various shapes and is not unique, so that it is difficult to automatically feed the valve connector 100 and the valve core 101 separately in the form of vibration discs, because the vibration discs are required to be replaced for feeding each valve connector 100 with different structures, which is costly and complicated. Therefore, in the traditional processing production, the welding is usually realized in a manual welding mode, but the manual welding has the defects of poor welding precision, high rejection rate, low welding efficiency and the like.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the defects of the prior art are overcome, and the automatic welding device is high in welding precision, high in efficiency and low in cost.

The utility model adopts the technical proposal that: the utility model provides an automatic welding device, includes the frame, be equipped with on the roof of frame:

the welding mechanism comprises an upper welding head tool and a lower welding head tool, wherein the upper welding head tool is provided with an upper welding head, the lower welding head tool is provided with a lower welding head, and the upper welding head and the lower welding head are respectively connected to the positive pole and the negative pole of a welding part transformer;

the workpiece feeding mechanism is used for conveying the workpieces to be welded to the position right below the upper welding head one by one;

the welding part feeding mechanism is used for conveying the welding parts to be positioned above the lower welding head one by one;

the driving mechanism is used for driving the lower welding head to move towards the upper welding head until the welding part is in contact conduction with the workpiece to generate welding arc so as to realize welding fixation;

and the controller is electrically connected with the welding mechanism, the workpiece feeding mechanism, the welding part feeding mechanism and the driving mechanism, so that the automatic control of the welding process is realized.

Compared with the prior art, the utility model has the following advantage:

the utility model discloses an among the welding set, convey the work piece to the soldered connection position through automatic, with a welding conveying to bonding tool position down, and bonding tool frock moves towards last bonding tool position under the corresponding actuating mechanism drive, until removing to a positive negative pole position that corresponds in welded structure with the work piece simultaneous location, it realizes automatic weld fixing to switch on release electric arc when both contacts, the artifical location is not needed to the duration, avoid human error, and guarantee the welding back at every turn through mechanized transmission positioning mode, the axiality of a welding and work piece, namely, guarantee the welding precision, effectively improve the product percent of pass.

Furthermore, the workpiece feeding mechanism comprises a mounting frame, a divider is arranged on the mounting frame, a distributing disc is arranged on an output shaft of the divider, and a plurality of limiting grooves for inserting workpieces are uniformly arranged on the outer edge of the distributing disc along the circumferential direction. In the structure, the structure of the limiting groove is matched with the appearance of the tubular connector of the workpiece, so that clamping and feeding of workpieces in various shapes can be realized, and the universality is high.

As an improvement, the upper welding head tool comprises a fixed base, and the upper welding head is arranged on the fixed base; the lower welding head tool comprises a mounting plate which is arranged on the top plate in a sliding mode, a mounting block which can slide along the vertical direction is arranged on the mounting plate, the lower welding head is arranged on the mounting block along the vertical direction, and an insertion groove used for inserting a welding part is formed in the upper end of the lower welding head.

In another improvement, the driving mechanism comprises a first driving cylinder and a second driving cylinder, the first driving cylinder is horizontally fixed on the top plate, and a piston rod of the first driving cylinder is connected to the end part of the mounting plate; the second driving cylinder is vertically arranged below the mounting plate, the top plate is provided with an avoidance through hole, the lower end of the second driving cylinder is slidably arranged in the avoidance through hole in a penetrating mode, and a piston rod of the second driving cylinder penetrates upwards to be arranged out of the mounting plate and connected with the mounting block.

And when a welding piece in the vibration disc is conveyed into the clamping groove, the feeding driving cylinder drives the feeding die to move towards the lower welding head until the welding piece is positioned right above the lower welding head.

And the lower welding head tool further comprises a middle position pressure retaining valve, and the middle position pressure retaining valve is connected with the first driving cylinder. The arrangement of the middle pressure retaining valve enables the piston rod of the corresponding driving cylinder to stop at the middle position, and corresponding action requirements are met.

And the mounting frame is further improved, an unloading deflector rod and a hopper are further arranged on the mounting frame, the unloading deflector rod is obliquely arranged at the position, close to the outer edge, of the material distribution disc and located in the front of the rotation direction of the welding mechanism, the hopper is arranged below the unloading deflector rod, and the welded workpiece is gradually separated from the limiting groove under the limiting and guiding effect of the unloading deflector rod along with the rotation of the material distribution disc until the workpiece falls into the hopper.

And when the material distribution disc rotates to a position where the workpiece is positioned under the upper welding head, the limiting mechanism is pressed and limited on the outer side wall of the workpiece to keep the workpiece fixed. Because spacing groove aperture on the minute charging tray is greater than the cartridge shaft part of work piece, the work piece has a clearance in the spacing inslot promptly, and this stop gear sets up and makes the work piece can not take place the skew when the welding, improves the welding degree of accuracy.

The limiting mechanism comprises a positioning pressure rod and a positioning driving cylinder for driving the positioning pressure rod to horizontally move; the material distribution disc is provided with a guide seat, the guide seat is provided with a guide hole, and one end of the positioning pressure rod, which is far away from the positioning driving cylinder, is slidably arranged in the guide hole in a penetrating manner. The limiting mechanism is also provided with a corresponding guide seat and a corresponding guide hole, so that the positioning pressure rod can keep better linearity and stability in the movement process, and the stable compression and limitation of the workpiece can be guaranteed.

The improved structure is characterized in that the top plate is further provided with a buffering and limiting mechanism for performing collision buffering on the horizontal movement of the mounting plate; and the extension length of the abutting stop block on the buffering and limiting mechanism is adjustable. This buffer gear is used for the operation to the mounting panel to cushion the anticollision life with improve equipment, and in addition, the last conflict dog's that is used for direct and mounting panel contact of buffering stop gear stretching out length is adjustable, can adjust the horizontal motion stroke of mounting panel promptly, improves the accurate control of working distance to the accurate centering of bonding tool and last bonding tool under the assurance, the axiality of assurance welding and work piece.

Drawings

Fig. 1 is a structure of a workpiece of the prior art.

Fig. 2 is a prior art weldment configuration.

Fig. 3 is a three-dimensional structure diagram of an automatic welding device of the present invention.

Fig. 4 is a top view of an automatic welding device according to the present invention.

Fig. 5 is a sectional view taken along line a-a in fig. 4.

Fig. 6 is an enlarged mechanical diagram at X in fig. 5.

Fig. 7 is a structural diagram of the workpiece feeding mechanism and the limiting mechanism of the present invention.

Fig. 8 is a structural diagram of the distribution tray of the present invention.

Fig. 9 is a structural view of a weld work feeding mechanism according to the present invention.

Fig. 10 is a structural view of a feeding mold in the present invention.

Wherein, 100-workpiece, 101-welding part;

1-a machine frame, 2-a top plate, 3-an upper welding head, 4-a lower welding head, 4.1-a splicing groove, 5-a mounting frame, 6-a divider, 7-a material distribution disc, 7.1-a limiting groove, 8-a fixed base, 9-a mounting plate, 10-a mounting block, 11-a first driving cylinder, 12-a second driving cylinder, 13-a vibration disc, 14-a mounting seat, 15-a feeding mold, 15.1-a clamping groove, 16-a feeding driving cylinder, 17-a middle pressure retaining valve, 18-a discharging deflector rod, 19-a hopper, 20-a positioning pressure rod, 21-a positioning driving cylinder, 22-a guide seat, 22.1-a guide hole, 23-a collision baffle, 24-a magnet, a 25-welding part transformer, 26-a welding control box and 27-an air storage tank, 28-air source processor, 29-control box, 30-touch screen, 31-linear guide rail and 32-fixed support.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

In the description of the present invention, it should be noted that the terms "directly above", "above and below", "upper end", "lower end", "outer edge", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, for the sake of distinguishing one from another.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 3 and 4, the utility model provides an automatic welding device, including frame 1, be equipped with on the roof 2 of frame 1:

the welding mechanism is used for realizing automatic welding of the workpiece 100 and the welding part 101, and particularly comprises an upper welding head tool and a lower welding head tool, wherein the upper welding head tool is provided with an upper welding head 3, the lower welding head tool is provided with a lower welding head 4, in addition, in the structure, the upper welding head 3 and the lower welding head 4 are both electrically connected with corresponding welding transformers 25 and are controlled by a welding part control box 26, namely, when the upper welding head 3 is in contact conduction with the lower welding head 4, welding electric arcs can be automatically generated, the welding part 101 in the lower welding head 4 is enabled to be welded at the corresponding position on the workpiece 100 right below the upper welding head 3, and the automatic contact welding is realized;

a workpiece feeding mechanism for conveying the workpieces 100 to be welded one by one to the position right below the upper welding head 3;

the welding part feeding mechanism is used for conveying the welding parts 101 to the upper part of the lower welding head 4 one by one;

the driving mechanism drives the lower welding head tool to operate until the welding part 101 is in contact conduction with the workpiece 100 to generate welding arc to realize welding fixation after the welding part 101 to be welded is conveyed to the lower welding head 4;

the controller is electrically connected with the welding mechanism, the workpiece feeding mechanism, the welding part feeding mechanism and the driving mechanism, so that automatic control of a welding process is realized.

Specifically, in this embodiment, as shown in fig. 7 and 8, the workpiece feeding mechanism includes a mounting frame 5, a divider 6 is provided on the mounting frame 5, specifically, the divider 6 is a cam divider, a material distribution plate 7 is provided on an output shaft of the divider 6, a plurality of limiting grooves 7.1 for inserting the workpieces 100 are provided on an outer edge of the material distribution plate 7 in a circumferential direction in an equal division manner, the material distribution plate 7 is driven by the divider 6 in an equal angle to switch, each time the workpieces 100 are accurately operated to the welding mechanism, and the automatic welding precision is improved. Specifically, as shown in fig. 8, the position on the distribution plate 7 near each limiting groove 7.1 is provided with the magnet 24, so that the workpiece 100 is more firmly clamped in the limiting groove 7.1, and cannot be thrown out in the rotating process of the distribution plate 7, and the safety is higher.

The upper welding head tool comprises a fixed base 8, and the upper welding head 3 is arranged on the fixed base 8; the lower welding head tool comprises a mounting plate 9 which is arranged on the top plate 2 in a sliding mode, a mounting block 10 which can slide vertically is arranged on the mounting plate 9, the lower welding head 4 is arranged on the mounting block 10 vertically, and an inserting groove 4.1 for inserting a welding part 101 is formed in the upper end of the lower welding head 4. In this structure, the upper welding head 3 and the lower welding head 4 are both connected to the positive and negative poles of the corresponding welding transformer 25, and the welding control box 26 is used to control the output of the welding current and the setting of the welding parameters.

As shown in fig. 5 and 6, the driving mechanism includes a first driving cylinder 11 for driving the mounting plate 9 to move toward the position of the upper welding head 3 and a second driving cylinder 12 for controlling the mounting plate 9 to move the lower welding head 4 up and down. Specifically, the first driving cylinder 11 is fixed on the top plate 2 along the horizontal direction, and the piston rod of the first driving cylinder 11 is connected to the end portion of the mounting plate 9 on the side away from the upper welding head 3, in this structure, the mounting plate 9 is slidably connected with the top plate 2 through a linear slide rail structure.

In addition, the second driving cylinder 12 is vertically arranged below the mounting plate 9, the top plate 2 is provided with an avoidance through hole 2.1, the lower end of the second driving cylinder 12 penetrates through the avoidance through hole 2.1 in a sliding manner, a piston rod of the second driving cylinder 12 upwards penetrates out of the mounting plate 9 and is connected with the mounting block 10, namely when the first driving cylinder 11 pushes the mounting plate 9 to move towards the position of the upper welding head 3, the second driving cylinder 12 moves synchronously along with the upper welding head, the lower end of the second driving cylinder 12 slides in the avoidance through hole 2.1, when the mounting plate 9 moves to a preset welding station, the second driving cylinder 12 extends upwards to move, and the lower welding head 4 is driven to drive the welding part 101 to move into the welding hole of the workpiece 100.

More specifically, as shown in fig. 4, 9 and 10, the feeding mechanism for the welded parts in the structure includes a vibration plate 13 and a mounting seat 14, a feeding mold 15 and a feeding driving cylinder 16 for driving the feeding mold 15 to horizontally slide are slidably disposed on the mounting seat 14, a clamping groove 15.1 is disposed on the feeding mold 15, when the welded part 101 in the vibration plate 13 is conveyed into the clamping groove 15.1 through a guide chute, the feeding driving cylinder 16 drives the feeding mold 15 to move towards the lower welding head 4 until the welded part 101 is located right above the lower welding head 4, and then, the second driving cylinder 12 drives the lower welding head 4 to move upwards, so that the lower end of the welded part 101 is inserted into the insertion groove 4.1 of the lower welding head 4. In this structure, in order to increase the spacing stability of welding 101 and draw-in groove 15.1, the position that is close to draw-in groove 15.1 on feed mould 15 is equipped with the mounting hole, and the cartridge is equipped with magnet 24 in the mounting hole, promptly, when welding 101 enters into draw-in groove 15.1 from the baffle box, under magnet 24 just adsorption, can reach more stable spacing. In addition, in this structure, the feeding mold 15 is connected to the mounting seat 14 by a linear slide rail 31.

In addition, because the upper end of the welding part 101 has the structure of the limiting convex edge 101.1, when the welding part is clamped in the clamping groove 15.1, the limiting convex edge 101.1 is supported on the upper end surface of the clamping groove 15.1 and is under the suction action of the magnet 24, in the structure of the device, because of the limitation of space, when the lower welding head 4 drives the welding part 101 to continuously move towards the upper welding head 3, the mounting plate 9 must be firstly promoted to drive the lower welding head 4 to firstly move downwards for a certain distance and then to continuously move horizontally, therefore, in the structure, in order to enable the welding part 101 and the lower welding head 4 to simultaneously move to the upper welding head 3, the demoulding of the welding part 101 and the feeding die 15 must be firstly realized, therefore, the structure of the first driving cylinder 11 in the structure is also connected with the middle pressure retaining valve 17, so that the first driving cylinder 11 can stop midway when not reaching the limit displacement after running for a certain distance, the welding part 101 is suspended at a set position after being separated from the clamping groove 15.1; and then the second driving cylinder 12 continues to drive the mounting block 10 to move downwards to drive the lower welding head 4 and the welding part 101 to move downwards, and when the lower welding head 4 and the welding part 101 move downwards to the state without horizontal position interference, the first driving cylinder 11 drives the mounting plate 9 to move horizontally to drive the lower welding head 4 to drive the welding part 101 to move to the position right below the workpiece 100.

As shown in fig. 3, 4 and 7, the mounting frame 5 is further provided with a discharging deflector rod 18 and a hopper 19, the discharging deflector rod 18 is obliquely arranged at a position close to the outer edge of the distribution disc 7 and located in front of the rotation direction of the welding mechanism, the hopper 19 is arranged below the discharging deflector rod 18, and along with the rotation of the distribution disc 7, the welded workpiece 100 is gradually separated from the limiting groove 7.1 under the limiting guide effect of the discharging deflector rod 18 until the welded workpiece falls into the hopper 19, so that the automatic collection of the welded workpiece 100 is realized.

The rack 1 is also provided with a limiting mechanism, when the material distribution disc 7 rotates to a position where the workpiece 100 is positioned under the upper welding head 3, namely a welding station, the limiting mechanism is pressed and limited on the outer side wall of the workpiece 100, so that the workpiece 100 is kept fixed, and the welding accuracy of the workpiece 100 is improved. More specifically, the limiting mechanism comprises a positioning compression rod 20 and a positioning driving cylinder 21 for driving the positioning compression rod 20 to move horizontally, the positioning driving cylinder 21 is installed on the top plate 2 through a corresponding fixing support 32, a piston rod of the positioning driving cylinder 21 is connected with one end of the positioning compression rod 20, and the other end of the positioning compression rod 20 is pressed on the outer side wall of the workpiece 100; in addition, the outer edge position of the distributing tray 7 is provided with a guide seat 22, the guide seat 22 is provided with a guide hole 22.1, and one end of the positioning pressure rod 20 far away from the positioning driving cylinder 21 is slidably arranged in the guide hole 22.1 in a penetrating manner, so that the sliding stability is ensured, and the deviation is avoided.

On the other hand, a buffering and limiting mechanism is further arranged on the top plate 2 and used for performing collision buffering on the horizontal movement of the mounting plate 9; and the protruding length of the abutting stop block 23 on the buffering and limiting mechanism is adjustable, and the centering performance of the lower welding head 4 and the upper welding head 3 is further adjusted, so that the coaxiality of the welded part 101 and the welded workpiece 100 is improved, the welding quality of the product is ensured, the rejection rate is reduced, and the qualified rate is improved.

The welding process of the device is as follows:

1. firstly, filling a welding piece 101 in a vibration disc 13, and filling a workpiece 100 in a limiting groove 7.1 of a distributing disc 7;

2. the welding part 101 is conveyed into a clamping groove 15.1 of the feeding die 15 through a vibrating disc and adsorbed on a magnet close to the clamping groove 15.1, and then the feeding die 15 is pushed by a feeding driving cylinder 16 to move towards the lower welding head 4 until the welding part 101 moves to the position right above the lower welding head 4;

3. the second driving cylinder 12 performs ejection motion to drive the lower welding head 4 to move upwards, and the lower end of the welding part 101 is inserted into the insertion groove 4.1 of the lower welding head 4;

4. the middle pressure retaining valve 17 works for the first time, controls the first driving cylinder 11 to push forwards for a short distance and then hover, so that the demolding action of the welding piece 101 and the feeding mold 15 is completed, and after the supporting and limiting of the feeding mold 5 is lost, the welding piece 101 continuously moves downwards into the insertion groove 4.1 under the action of self weight until the limiting convex edge 101.1 on the welding piece 101 is limited and abutted against the upper end surface of the lower welding head 4 (as shown in fig. 6);

5. the second driving cylinder 12 travels a certain distance downwards;

6. the middle pressure retaining valve 17 works for the second time, and controls the first driving cylinder 11 to drive the mounting plate 6 to move towards the upper welding head 3 until the welding part 101 moves to the position right below the upper welding head 3 and reaches a welding station;

7. the second driving cylinder 12 performs ejection action again, and when the upper end of the welding part 101 extends into the welding hole of the workpiece 100 and contacts with the bottom of the welding hole, welding electric arc is generated under the discharge action of the transformer, so that the upper end of the welding part 101 is welded and fixed with the bottom of the welding hole of the workpiece 100;

8. the second driving cylinder 12 is reset downwards after the welding is finished;

9. the other driving cylinders are reset simultaneously, and the material distribution disc 7 rotates to prepare for next welding; the discharging deflector rod 18 separates the welded workpieces 100 from the position of the limiting groove 7.1 of the distribution disc 7 and falls into the hopper 19 in a following manner in the rotation process of the distribution disc 7, automatic collection of the workpieces 100 is achieved, and when one workpiece 100 falls along with the rotation of the distribution disc 7, one workpiece 100 to be welded is manually inserted into the limiting groove 7.1, so that continuous welding of the workpieces 100 is guaranteed, an operator only needs to place the workpiece 100 in the whole welding process, and labor is saved.

The embodiment of the utility model provides an in, for the promotion of environmental protection more and control accuracy, foretell actuating cylinder is the cylinder structure to, in order to adjust atmospheric pressure and stabilize gas circuit pressure, be provided with gas holder 27 and the air source treater 28 with each actuating cylinder pneumatic connection on roof 2 of frame 1, for the automatic and accurate control of better realization, every actuating cylinder all corresponding is connected with the solenoid valve, each solenoid valve and controller signal connection.

While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides an automatic welding device, includes frame (1), its characterized in that, be equipped with on roof (2) of frame (1):

the welding mechanism comprises an upper welding head tool and a lower welding head tool, wherein an upper welding head (3) is arranged on the upper welding head tool, a lower welding head (4) is arranged on the lower welding head tool, and the upper welding head (3) and the lower welding head (4) are respectively connected to the positive pole and the negative pole of a welding transformer (25);

the workpiece feeding mechanism is used for conveying the workpieces (100) to be welded to the position right below the upper welding head (3) one by one;

the welding part feeding mechanism is used for conveying the welding parts (101) to be positioned above the lower welding head (4) one by one;

the driving mechanism is used for driving the lower welding head tool to move towards the upper welding head (3) until the welding part (101) is in contact conduction with the workpiece (100) to generate welding arc so as to realize welding fixation;

2. The automatic welding device of claim 1, wherein: the workpiece feeding mechanism comprises a mounting frame (5), a divider (6) is arranged on the mounting frame (5), a distributing disc (7) is arranged on an output shaft of the divider (6), and a plurality of limiting grooves (7.1) for inserting the workpieces (100) are uniformly distributed in the circumferential direction of the outer edge of the distributing disc (7).

3. The automatic welding device of claim 1, wherein: the upper welding head tool comprises a fixed base (8), and the upper welding head (3) is arranged on the fixed base (8); lower bonding tool frock establish mounting panel (9) on roof (2) including sliding, be equipped with on mounting panel (9) and follow vertical gliding installation piece (10), lower bonding tool (4) along vertical setting on installation piece (10), the upper end of lower bonding tool (4) is equipped with inserting groove (4.1) that are used for supplying welding piece (101) cartridge.

4. The automatic welding device of claim 3, wherein: the driving mechanism comprises a first driving cylinder (11) and a second driving cylinder (12), the first driving cylinder (11) is horizontally fixed on the top plate (2), and a piston rod of the first driving cylinder (11) is connected to the end part of the mounting plate (9); second driving cylinder (12) are along vertical below of establishing at mounting panel (9), roof (2) on be equipped with and dodge through-hole (2.1), the lower extreme of second driving cylinder (12) slides and wears to establish in dodging through-hole (2.1), the piston rod of second driving cylinder (12) is worn out mounting panel (9) upwards and is connected with installation piece (10).

5. The automatic welding device of claim 3, wherein: the welding piece feeding mechanism comprises a vibration disc (13) and a mounting seat (14), a feeding die (15) and a feeding driving cylinder (16) for driving the feeding die (15) to horizontally slide are arranged on the mounting seat (14) in a sliding mode, a clamping groove (15.1) is formed in the feeding die (15), and when a welding piece (101) in the vibration disc (13) is conveyed into the clamping groove (15.1), the feeding driving cylinder (16) drives the feeding die (15) to move towards the lower welding head (4) until the welding piece (101) is located right above the lower welding head (4).

6. The automatic welding device according to claim 3, 4 or 5, characterized in that: lower bonding tool frock still include meso position pressure retaining valve (17), meso position pressure retaining valve (17) be connected with first actuating cylinder (11).

7. The automatic welding device of claim 2, wherein: mounting bracket (5) on still be equipped with unloading driving lever (18) and hopper (19), the slope of unloading driving lever (18) establish and be close to the place ahead position that outer edge just is located the welding mechanism rotation direction in branch charging tray (7), the below at unloading driving lever (18) is established in hopper (19), along with the rotation of branch charging tray (7), work piece (100) after the welding are separated with spacing groove (7.1) gradually under the spacing guide effect of unloading driving lever (18) until fall in hopper (19).

8. The automatic welding device of claim 7, wherein: the frame (1) is also provided with a limiting mechanism, and when the material distribution disc (7) rotates to the position where the workpiece (100) is positioned under the upper welding head (3), the limiting mechanism is pressed and limited on the outer side wall of the workpiece (100) to keep the workpiece fixed.

9. The automatic welding device of claim 8, wherein: the limiting mechanism comprises a positioning compression rod (20) and a positioning driving cylinder (21) for driving the positioning compression rod (20) to horizontally move; the material distribution disc (7) is provided with a guide seat (22), the guide seat (22) is provided with a guide hole (22.1), and one end of the positioning pressure rod (20) far away from the positioning driving cylinder (21) is slidably arranged in the guide hole (22.1).

10. The automatic welding device of claim 8, wherein: the top plate (2) is also provided with a buffering and limiting mechanism for performing collision buffering on the horizontal movement of the mounting plate (9); and the protruding length of a collision stop block (23) on the buffering and limiting mechanism is adjustable.