CN113102887A

CN113102887A - Omnibearing laser welding production line and welding method thereof

Info

Publication number: CN113102887A
Application number: CN202110427827.0A
Authority: CN
Inventors: 蒋习锋; 尹宁宁
Original assignee: Jinan GWeike Science & Technology Co ltd
Current assignee: Jinan GWeike Science & Technology Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-07-13

Abstract

The invention discloses an all-dimensional laser welding production line and a welding method thereof, and belongs to the technical field of welding. An omnibearing laser welding production line comprises a workbench, wherein a plurality of groups of fixed cylinders are symmetrically connected to two sides of the workbench, a first telescopic rod is connected in each fixed cylinder in a sliding manner, a supporting cross rod is fixedly connected to the upper end of each fixed cylinder in a symmetrical manner, a first threaded rod is rotatably connected between the supporting cross rods in a symmetrical manner, a welding piece is connected onto each first threaded rod in a threaded manner, one of the supporting cross rods is connected with a first driving motor, and the output end of the first driving motor is connected with the first threaded rod; according to the invention, the first plate and the second plate are conveniently welded through the fixed cylinder, the first telescopic rod, the supporting cross rod, the first driving motor and the welding part, and the welding position of the plate is conveniently positioned and welded through the first limiting block, the second limiting block, the sliding block and the connecting plate.

Description

Omnibearing laser welding production line and welding method thereof

Technical Field

The invention relates to the technical field of welding, in particular to an all-dimensional laser welding production line and a welding method thereof.

Background

Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source, the laser welding is one of important aspects of laser material processing technology application, the laser welding is mainly used for welding thin-wall materials and low-speed welding in the 20 th century in the 70 th, the welding process belongs to a heat conduction type, namely, the laser radiation heats the surface of a workpiece, the surface heat is diffused inwards through heat conduction, the workpiece is melted to form a specific molten pool by controlling parameters such as the width, the energy, the peak power, the repetition frequency and the like of laser pulse, and the laser welding has been successfully applied to the precision welding of micro and small parts due to the unique advantages of the laser welding;

when welding to plate, current welding mode is mostly manual welding, and manual welding can also reach the requirement in the face of under the less condition of length, but the length of plate is longer, and manual welding will bring great error, and the not assurance of welded quality moreover, and when welding the plate that the thickness is thinner, manual welding causes the damage to plate easily moreover, has consequently provided an all-round laser welding production line and welding method thereof.

Disclosure of Invention

The invention aims to solve the problems that when the length of a plate is longer, manual welding brings larger errors, the welding quality cannot be guaranteed, and when the plate with a thinner thickness is welded, the plate is easy to be damaged by manual welding.

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

an all-round laser welding production line comprises a workbench, wherein a plurality of groups of fixed cylinders are symmetrically connected to two sides of the workbench, a first telescopic rod is connected in the fixed cylinders in a sliding manner, a supporting cross rod is fixedly connected to the upper ends of the fixed cylinders in a symmetrical manner, a first threaded rod is rotatably connected between the supporting cross rods in a symmetrical manner, a welding part is connected to the first threaded rod in a threaded manner, a first driving motor is connected to one of the supporting cross rods, the output end of the first driving motor is connected with the first threaded rod, connecting rods are fixedly connected to two sides of the first threaded rod in a symmetrical manner, pressing parts are symmetrically connected to the connecting rods, a first plate and a second plate are symmetrically and slidably connected to the upper end of the workbench, the pressing parts are used for pressing the first plate and the second plate, positioning parts are connected to the welding positions of the first plate and the second plate, the lower end of the workbench is connected with a power part, and the power part is used for controlling the lifting of the first telescopic rod.

Preferably, the upper end of the workbench is rotatably connected with a plurality of groups of rotating rollers, and the first plate and the second plate are attached to the rotating rollers.

Preferably, the compressing part comprises a fixed block, the fixed block is symmetrically and fixedly connected to the connecting rod, a second telescopic rod is fixedly connected to the lower end of the fixed block, one end of the second telescopic rod, far away from the fixed block, is connected with a sliding barrel, a first spring is connected to the sliding barrel, and two ends of the first spring are respectively fixedly connected with the second telescopic rod and the sliding barrel.

Preferably, one end of the sliding cylinder, which is far away from the second telescopic rod, is fixedly connected with a clamping block, one end of the clamping block, which is far away from the sliding cylinder, is rotatably connected with a ball, and the ball is attached to the first plate and the second plate.

Preferably, the positioning part comprises a first chute and a plurality of groups, the first chute is symmetrically arranged on two sides of the workbench, a second threaded rod is connected in the first chute in a rotating mode, a first limiting block is connected to the second threaded rod in a threaded mode, and the first limiting block is attached to the first plate and the second plate.

Preferably, a second limiting block is connected to the middle of the upper end of the workbench in a sliding mode and attached to the second plate.

Preferably, be equipped with the second spout in the workstation, sliding connection has the sliding block in the second spout, just the sliding block upper end is the arc, sliding block lower extreme fixedly connected with connecting plate, the one end and the second stopper fixed connection of sliding block are kept away from to the connecting plate.

Preferably, the second sliding groove is internally and symmetrically connected with a second spring, and two ends of the second spring are respectively and fixedly connected with the connecting plate and the workbench.

Preferably, the power component comprises a second driving motor, the output end of the second driving motor is fixedly connected with a first bevel gear, the second driving motor is connected with the bottom end of the workbench, liquid grooves are symmetrically arranged on two sides of the bottom end of the workbench, a bidirectional threaded rod is rotationally connected in the liquid grooves, the two-way threaded rod penetrates and is symmetrical to the liquid groove, both ends of the two-way threaded rod are in threaded connection with pushing plates, the pushing plate is matched with the liquid groove, the middle of the bidirectional threaded rod is fixedly connected with a second bevel gear, the lower end of the workbench is symmetrically and rotatably connected with a connecting shaft, both ends of the connecting shaft are fixedly connected with a third bevel gear, and the third helical gear is symmetrically meshed with the first helical gear and the second helical gear respectively, the liquid tank is connected with a connecting pipe, and one end of the connecting pipe, which is far away from the liquid tank, is connected with the fixed cylinder.

An omnibearing laser welding method comprises the following steps:

s1, firstly, placing the first plate and the second plate on two sides of a workbench, and pushing the second plate to be attached to a second limiting block as the workbench is connected with a rotating roller;

s2, rotating the second threaded rod, wherein the first limiting block is moved by the rotation of the second threaded rod due to the threaded connection of the first limiting block and the second threaded rod, so that the first limiting block is attached to the second plate, and the position of the second plate is limited;

s3, placing the first plate on the workbench, and pushing the first plate to be close to the second plate, wherein the first plate is in contact with the sliding block in the process of pushing the first plate;

s4, the sliding block slides downwards under the extrusion of the first plate, and because the sliding block is connected with the second limiting block through the connecting plate, the sliding block moves downwards so as to enable the second limiting block to move downwards, the second limiting block is separated from the contact with the second plate, the first plate is continuously pushed to be in contact with the second plate, and the first plate and the second plate can be conveniently welded;

s5, by starting the second driving motor and controlling the rotation direction of the second driving motor, liquid is controlled to enter the fixed cylinder, the welding height is changed conveniently, the first threaded rod is rotated by starting the first driving motor, a welding part is moved, and the plate is welded.

Compared with the prior art, the invention provides an omnibearing laser welding production line which has the following beneficial effects:

1. according to the welding production line, the first plate and the second plate are placed on two sides of the workbench, the rotating rollers are connected to the workbench, so that the plates can be conveniently pushed, damage to the plates is reduced, the second plate is pushed to be attached to the second limiting block, the clamping block is connected with the balls, abrasion to the plates can be reduced, and the plates are clamped to ensure that the plates cannot move in the welding process;

2. according to the welding production line, by rotating the second threaded rod, as the first limiting block is in threaded connection with the second threaded rod, the second threaded rod rotates to further move the first limiting block, so that the first limiting block is attached to the second plate, and the position of the second plate is limited;

3. the welding production line is characterized in that a first plate is placed on a workbench and is close to a second plate by pushing the first plate, the first plate is in contact with a sliding block in the process of pushing the first plate, the sliding block slides downwards under the extrusion of the first plate, and the sliding block is connected with a second limiting block through a connecting plate and moves downwards so that the second limiting block moves downwards to be separated from the second plate and continuously pushes the first plate to be in contact with the second plate, so that the first plate and the second plate can be conveniently welded;

4. this welding production line, through starting second driving motor, through the direction of rotation of controlling second driving motor, control liquid gets into the solid fixed cylinder in, and then conveniently changes welded height, makes first threaded rod rotate through starting first driving motor, and then makes a removal, welds to the plate.

The welding device is characterized in that the parts which are not involved in the welding device are the same as or can be realized by adopting the prior art, the first plate and the second plate can be conveniently welded through the fixed cylinder, the first telescopic rod, the supporting cross rod, the first driving motor and the welding part, and the welding position of the plate can be conveniently positioned and conveniently welded through the first limiting block, the second limiting block, the sliding block and the connecting plate.

Drawings

FIG. 1 is a schematic sectional view of an omnidirectional laser welding line according to the present invention;

FIG. 2 is a schematic top view of an omnidirectional laser welding line according to the present invention;

FIG. 3 is a schematic diagram of a top cross-sectional view of an omnidirectional laser welding line according to the present invention;

FIG. 4 is a schematic diagram of a top cross-sectional view of an omnidirectional laser welding line according to the present invention;

FIG. 5 is a schematic view of a portion A of FIG. 3 illustrating an omni-directional laser welding process according to the present invention;

fig. 6 is a schematic structural diagram of a portion B in fig. 1 of an omni-directional laser welding line according to the present invention.

In the figure: 1. a work table; 2. a first plate member; 3. a second plate member; 4. a fixed cylinder; 5. a first telescopic rod; 6. a support rail; 7. a first drive motor; 8. a first threaded rod; 9. a welding part; 10. a connecting rod; 101. a fixed block; 102. a second telescopic rod; 103. a slide cylinder; 104. a first spring; 105. a clamping block; 11. rotating the roller; 12. a first chute; 121. a second threaded rod; 122. a first stopper; 13. a second limiting block; 14. a second chute; 15. a slider; 17. a connecting plate; 18. a second spring; 19. a liquid tank; 20. a bidirectional threaded rod; 21. a connecting shaft; 22. a second drive motor; 23. a connecting pipe; 24. and pushing the plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-6, an omnibearing laser welding production line comprises a workbench 1, wherein a plurality of groups of fixed cylinders 4 are symmetrically connected on two sides of the workbench 1, first telescopic rods 5 are slidably connected in the fixed cylinders 4, supporting cross rods 6 are fixedly connected on the upper ends of the symmetrical fixed cylinders 4, first threaded rods 8 are rotatably connected between the symmetrical supporting cross rods 6, welding pieces 9 are connected on the first threaded rods 8 in a threaded manner, a first driving motor 7 is connected on one supporting cross rod 6, the output end of the first driving motor 7 is connected with the first threaded rod 8, connecting rods 10 are symmetrically and fixedly connected on two sides of the first threaded rod 8, pressing parts are symmetrically connected on the connecting rods 10, a first plate 2 and a second plate 3 are symmetrically and slidably connected on the upper end of the workbench 1, the pressing parts are used for pressing the first plate 2 and the second plate 3, and a positioning part is connected on, the positioning component is used for positioning the welding position of the first plate 2 and the second plate 3, the lower end of the workbench 1 is connected with a power component, and the power component is used for controlling the lifting of the first telescopic rod 5.

When the device is used, the first plate 2 and the second plate 3 are firstly placed on two sides of the workbench 1, the rotating roller 11 is connected to the workbench 1, so that the plates can be conveniently pushed, meanwhile, the damage to the plates is reduced, the second plate 3 is pushed to be attached to the second limiting block 13, when the plates are pushed, the sliding cylinder 103 moves upwards under the support of the plates due to the certain thickness of the plates, the clamping block 105 is only attached to the plates under the action of the first spring 104, the abrasion to the plates can be reduced due to the fact that the clamping block 105 is connected with the balls, and the plates can be clamped to ensure that the plates cannot move in the welding process;

by rotating the second threaded rod 121, as the first limiting block 122 is in threaded connection with the second threaded rod 121, the second threaded rod 121 rotates to further move the first limiting block 122, so that the first limiting block 122 is attached to the second plate 3, and the position of the second plate 3 is limited;

the first plate 2 is placed on the workbench 1, the first plate 2 is pushed to be close to the second plate 3, the first plate 2 is in contact with the sliding block 15 in the process of pushing the first plate 2, the sliding block 15 slides downwards under the extrusion of the first plate 2, the sliding block 15 is connected with the second limiting block 13 through the connecting plate 17, the sliding block 15 moves downwards, the second limiting block 13 is separated from the second plate 3, the first plate 2 is continuously pushed to be in contact with the second plate 3, and therefore the first plate 2 and the second plate 3 can be conveniently welded;

by starting the second driving motor 22, the rotation is transmitted to the connecting shaft 21 through the first bevel gear, because the connecting shaft 21 is connected with the two-way threaded rod 20 through the bevel gear, and then the rotation is transmitted to the two-way threaded rod 20, there is a threaded connection between the pushing plate 24 and the two-way threaded rod 20, and then the pushing plate 24 moves, under the pushing of the pushing plate 24, the liquid in the liquid groove 19 is extruded into the fixed cylinder 4 through the connecting pipe 23, and then the first telescopic rod 5 moves, the purpose of adjusting the height of the welding part 9 is achieved, through controlling the rotation direction of the second driving motor 22, the control liquid enters the fixed cylinder 4, and then the welding height is conveniently changed, the first threaded rod 8 is rotated by starting the first driving motor 7, and then the welding part 9 moves, and the welding part is welded.

Example 2:

referring to fig. 1-2, an all-round laser welding line, substantially the same as in example 1, further comprising: the upper end of the working table 1 is rotatably connected with a plurality of groups of rotating rollers 11, the first plate 2 and the second plate 3 are attached to the rotating rollers 11, and abrasion to the first plate 2 and the second plate 3 is reduced.

Example 3:

referring to fig. 1, an all-round laser welding line, substantially the same as in embodiment 1, further includes: the compressing component comprises a fixing block 101, the fixing block 101 is symmetrically and fixedly connected to the connecting rod 10, a second telescopic rod 102 is fixedly connected to the lower end of the fixing block 101, a sliding cylinder 103 is slidably connected to one end, far away from the fixing block 101, of the second telescopic rod 102, a first spring 104 is connected to the sliding cylinder 103, two ends of the first spring 104 are fixedly connected with the second telescopic rod 102 and the sliding cylinder 103 respectively, and the plate is convenient to clamp.

Example 4:

referring to fig. 1 and 5, an all-directional laser welding line is substantially the same as that of embodiment 1, and further includes: one end of the sliding cylinder 103, which is far away from the second telescopic rod 102, is fixedly connected with a clamping block 105, one end of the clamping block 105, which is far away from the sliding cylinder 103, is rotatably connected with a ball, and the ball is attached to the first plate 2 and the second plate 3, so that the abrasion of the clamping block 105 on the plates is reduced.

Example 5:

referring to fig. 1 and 5, an all-directional laser welding line is substantially the same as that of embodiment 1, and further includes: the positioning component comprises a first chute 12, a plurality of groups of first chutes 12 are symmetrically arranged on two sides of the workbench 1, a second threaded rod 121 is rotationally connected in the first chute 12, a first limiting block 122 is in threaded connection with the second threaded rod 121, and the first limiting block 122 is attached to the first plate 2 and the second plate 3 so as to position the welding positions of the plates.

Example 6:

referring to fig. 1 and 5, an all-directional laser welding line is substantially the same as that of embodiment 1, and further includes: the middle of the upper end of the workbench 1 is slidably connected with a second limiting block 13, and the second limiting block 13 is attached to the second plate 3, so that the welding position can be conveniently positioned.

Example 7:

referring to fig. 1 and 6, an all-directional laser welding line is substantially the same as that of embodiment 1, and further includes: be equipped with second spout 14 in the workstation 1, sliding connection has sliding block 15 in the second spout 14, and sliding block 15 upper end is the arc, sliding block 15 lower extreme fixedly connected with connecting plate 17, and sliding block 15's one end and second stopper 13 fixed connection are kept away from to connecting plate 17, are convenient for make second stopper 13 slide.

Example 8:

referring to fig. 1 and 6, an all-directional laser welding line is substantially the same as that of embodiment 1, and further includes: the second sliding groove 14 is internally and symmetrically connected with a second spring 18, and two ends of the second spring 18 are respectively and fixedly connected with the connecting plate 17 and the workbench 1, so that the sliding block 15 and the second limiting block 13 can return to the original positions conveniently.

Example 9:

referring to fig. 4, an all-round laser welding line, substantially the same as in embodiment 1, further includes: the power part comprises a second driving motor 22, the output end of the second driving motor 22 is fixedly connected with a first bevel gear, the second driving motor 22 is connected with the bottom end of the workbench 1, liquid grooves 19 are symmetrically arranged at two sides of the bottom end of the workbench 1, a bidirectional threaded rod 20 is rotationally connected in the liquid grooves 19, the two-way threaded rod 20 penetrates through the symmetrical liquid groove 19, both ends of the two-way threaded rod 20 are in threaded connection with pushing plates 24, the pushing plates 24 are matched with the liquid groove 19, the middle of the two-way threaded rod 20 is fixedly connected with a second bevel gear, the lower end of the workbench 1 is symmetrically and rotatably connected with a connecting shaft 21, both ends of the connecting shaft 21 are fixedly connected with a third bevel gear, the third symmetrical helical gear is respectively meshed with the first helical gear and the second helical gear, the liquid tank 19 is connected with a connecting pipe 23, and one end of the connecting pipe 23, which is far away from the liquid tank 19, is connected with the fixed cylinder 4, so that the welding part 9 can move up and down conveniently.

According to the welding device, the first plate 2 and the second plate 3 are conveniently welded through the fixed cylinder 4, the first telescopic rod 5, the supporting cross rod 6, the first driving motor 7 and the welding part 9, and the welding positions of the plates are conveniently positioned and welded through the first limiting block 122, the second limiting block 13, the sliding block 15 and the connecting plate 17.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an all-round laser welding production line, includes workstation (1), its characterized in that, workstation (1) bilateral symmetry is connected with the solid fixed cylinder of multiunit (4), gu sliding connection has first telescopic link (5) in fixed cylinder (4), the symmetry gu fixed cylinder (4) upper end fixedly connected with supports horizontal pole (6), the symmetry it is connected with first threaded rod (8) to support to rotate between horizontal pole (6), threaded connection has a welding piece (9) on first threaded rod (8), one of them be connected with first driving motor (7) on supporting horizontal pole (6), first driving motor (7) output is connected with first threaded rod (8), first threaded rod (8) bilateral symmetry fixedly connected with connecting rod (10), the symmetrical connection has the part that compresses tightly on connecting rod (10), workstation (1) upper end symmetry sliding connection has first plate (2) The second plate (3), the part that compresses tightly is used for compressing tightly first plate (2), second plate (3), be connected with positioning component on workstation (1), positioning component is used for fixing a position the welding department of first plate (2) and second plate (3), workstation (1) lower extreme is connected with power component, power component is used for controlling the lift of first telescopic link (5).

2. The all-round laser welding production line of claim 1, characterized in that a plurality of sets of rotating rollers (11) are rotatably connected to the upper end of the working table (1), and the first plate (2) and the second plate (3) are attached to the rotating rollers (11).

3. The omnibearing laser welding production line according to claim 1, wherein the pressing component comprises a fixed block (101), the fixed block (101) is symmetrically and fixedly connected to the connecting rod (10), a second telescopic rod (102) is fixedly connected to the lower end of the fixed block (101), a sliding barrel (103) is slidably connected to one end, away from the fixed block (101), of the second telescopic rod (102), a first spring (104) is connected to the sliding barrel (103), and two ends of the first spring (104) are fixedly connected to the second telescopic rod (102) and the sliding barrel (103) respectively.

4. The omnibearing laser welding production line according to claim 3, wherein a clamping block (105) is fixedly connected to one end, away from the second telescopic rod (102), of the sliding barrel (103), and a ball is rotatably connected to one end, away from the sliding barrel (103), of the clamping block (105), and is attached to the first plate (2) and the second plate (3).

5. The all-round laser welding production line of claim 1, characterized in that, the locating component includes first spout (12), and the multiunit first spout (12) is established at workstation (1) both sides symmetrically, the internal rotation of first spout (12) is connected with second threaded rod (121), threaded connection has first stopper (122) on the second threaded rod (121), first stopper (122) paste with first plate (2), second plate (3).

6. The omnibearing laser welding production line according to claim 5, wherein a second limit block (13) is connected to the middle of the upper end of the workbench (1) in a sliding manner, and the second limit block (13) is attached to the second plate (3).

7. The omnibearing laser welding production line according to claim 6, wherein a second sliding groove (14) is arranged in the workbench (1), a sliding block (15) is slidably connected in the second sliding groove (14), the upper end of the sliding block (15) is arc-shaped, a connecting plate (17) is fixedly connected to the lower end of the sliding block (15), and one end, far away from the sliding block (15), of the connecting plate (17) is fixedly connected with the second limiting block (13).

8. The omnibearing laser welding production line according to claim 7, wherein a second spring (18) is symmetrically connected in the second chute (14), and two ends of the second spring (18) are respectively fixedly connected with the connecting plate (17) and the workbench (1).

9. The omnibearing laser welding production line according to claim 1, wherein the power unit comprises a second driving motor (22), the output end of the second driving motor (22) is fixedly connected with a first helical gear, the second driving motor (22) is connected with the bottom end of the workbench (1), two sides of the bottom end of the workbench (1) are symmetrically provided with liquid grooves (19), the liquid grooves (19) are rotatably connected with two-way threaded rods (20), the two-way threaded rods (20) penetrate through the liquid grooves (19) in a symmetrical manner, two ends of each two-way threaded rod (20) are both in threaded connection with pushing plates (24), the pushing plates (24) are matched with the liquid grooves (19), the middle of each two-way threaded rod (20) is fixedly connected with a second helical gear, the lower end of the workbench (1) is symmetrically and rotatably connected with a connecting shaft (21), the connecting shaft (21) is characterized in that third bevel gears are fixedly connected to two ends of the connecting shaft (21) and are symmetrically meshed with the first bevel gear and the second bevel gear respectively, a connecting pipe (23) is connected to the liquid groove (19), and one end, far away from the liquid groove (19), of the connecting pipe (23) is connected with the fixed cylinder (4).

10. An omnidirectional laser welding method comprising the omnidirectional laser welding production line according to any one of claims 1 to 9, characterized by comprising the steps of:

s1, firstly, the first plate (2) and the second plate (3) are placed on two sides of the workbench (1), and the second plate (3) is pushed to be attached to the second limiting block (13) firstly as the workbench (1) is connected with the rotating roller (11);

s2, by rotating the second threaded rod (121), as the first limiting block (122) is in threaded connection with the second threaded rod (121), the second threaded rod (121) rotates to further move the first limiting block (122), so that the first limiting block (122) is attached to the second plate (3), and the position of the second plate (3) is limited;

s3, placing the first plate (2) on the workbench (1), and pushing the first plate (2) to be close to the second plate (3), wherein the first plate (2) is in contact with the sliding block (15) in the process of pushing the first plate (2);

s4, the sliding block (15) slides downwards under the extrusion of the first plate (2), and as the sliding block (15) is connected with the second limiting block (13) through the connecting plate (17), the sliding block (15) moves downwards so as to enable the second limiting block (13) to move downwards, the second limiting block (13) is separated from the second plate (3), the first plate (2) is continuously pushed to be in contact with the second plate (3), and the first plate (2) and the second plate (3) can be conveniently welded;

s5, by starting the second driving motor (22), and by controlling the rotation direction of the second driving motor (22), liquid is controlled to enter the fixed cylinder (4), so that the welding height is convenient to change, the first threaded rod (8) is rotated by starting the first driving motor (7), and then the welding part (9) is moved to weld the plate.