CN216370754U - Welding device and welding device assembly - Google Patents

Abstract

The utility model relates to a welding device, which comprises a support, a connecting seat and a welding gun mounting seat, wherein the support is provided with a guide rail, the connecting seat is arranged on the guide rail in a sliding manner and can slide along the guide rail, the welding gun mounting seat is connected with the connecting seat, and the welding gun mounting seat is used for mounting a welding gun; the welding gun installing seat is arranged on the welding gun installing seat, and the welding gun installing seat is arranged on the welding gun installing seat. Through setting up elevation structure, when treating the work piece surface unevenness that welds like this, elevation structure drives the welder mount pad and reciprocates correspondingly, and the welder that is connected on the welder mount pad correspondingly reciprocates and fills the joint seam on treating the welding work piece. The utility model also provides a welding device assembly which is also suitable for welding workpieces to be welded with uneven surfaces.

Description

Welding device and welding device assembly

Technical Field

The utility model relates to the technical field of welding, in particular to a welding device and a welding device assembly.

Background

Welding, also known as fusion welding, is a manufacturing process and technique for joining metals or other thermoplastic materials, such as plastics, by means of heat, high temperature or high pressure. When two workpieces are required to be welded, the two workpieces to be connected are generally connected firstly, then a connecting seam between the two workpieces is filled by a welding gun to form a welding seam, and the two workpieces are connected into a whole by the welding seam, so that the welding is completed.

The workpiece to be welded may be, for example, a box transformer, a switch cabinet, etc. The box-type substation (box-type substation for short) is factory prefabricated indoor and outdoor compact distribution equipment with high-voltage switch equipment, distribution transformers and low-voltage distribution devices which are arranged into a whole according to a certain wiring scheme, namely, functions of high-voltage power receiving, transformer voltage reduction, low-voltage distribution and the like are organically combined together and are installed in a fully-closed steel structure box body.

The box transformer, for example, a shell of the box transformer is generally welded by hand, when the box transformer is welded by hand, uneven and uneven welding seams are easily caused, sand holes are easily generated at the position where the welding seams are thin due to rain, and the stable connection of two workpieces is affected, and in addition, the welding efficiency of the manual welding is low.

For this purpose, the applicant has designed a welding device. For example, Chinese utility model with application number CN202020441613.X (publication number CN212094985U) discloses an automatic welding device for the bottom of a transformer oil tank, which comprises a welding manipulator and a positioner, wherein the upper surface of a workbench is connected with a support plate through screws, the front side of the upper surface of the support plate is connected with a front baffle through screws, the right side of the upper surface of the support plate is connected with a right baffle through screws, the left side of the right baffle is provided with a right side plate, a U-shaped plate is arranged on the upper side of the support plate, one side of the U-shaped plate with the bottom surface is upwards arranged, the right end of the U-shaped plate is attached to the right side plate, the right end of the U-shaped plate can be rapidly positioned and placed by the right baffle, the right end of the U-shaped plate is attached to the left end of the U-shaped plate, the channel steel can be rapidly spliced and positioned by the positioning baffle, the welding manipulator is matched with the positioner to weld the bottom of the transformer oil tank, compared with manual welding, high working efficiency, good welding seam quality and reduced labor capacity of workers.

However, the above patent does not disclose how to weld if the surface of the workpiece to be welded is not flat (i.e. the surface of the workpiece to be welded is not a plane, such as a bevel or arc, etc.).

Thus, the welding device and welding device assembly may also continue to improve.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide a welding device, which can be applied to workpieces to be welded with uneven surfaces.

A second object of the present invention is to provide a welding device assembly according to the state of the art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a welding device, characterized by: comprises that

A bracket having a guide rail;

the connecting seat is arranged on the guide rail in a sliding manner and can slide along the guide rail;

the welding gun mounting seat is connected with the connecting seat and is used for mounting a welding gun;

the welding gun installing seat is arranged on the welding gun installing seat, and the welding gun installing seat is arranged on the welding gun installing seat.

The lifting structure can have various structures, preferably, the lifting structure comprises a first linear bearing arranged on the connecting seat and a guide post vertically penetrating through the first linear bearing, and the guide post is connected with the welding gun mounting seat;

the bottom of the welding gun mounting seat is provided with a roller assembly, the roller assembly is used for contacting with a workpiece to be welded, and the roller assembly can move on the workpiece to be welded under the action of external force.

Through setting up first linear bearing, frictional force is less like this and be convenient for the guide post smoothly to reciprocate, and the guide post moves up more steadily simultaneously.

In order to move up and down smoothly, the first linear bearings are provided with at least two linear bearings which are arranged at intervals, the number of the guide columns is the same as that of the first linear bearings, and each guide column penetrates through the corresponding first linear bearing;

and the bottom of the welding gun mounting seat is provided with a blocking part with the middle part protruding downwards, the blocking part is positioned between the roller assembly and the welding gun, and the blocking part is used for blocking welding slag generated when the welding gun works from being sprayed onto the roller assembly.

Through setting up two at least first linear bearing, the guide post reciprocates more steadily like this.

The welding gun mounting seat can have various structures, and preferably comprises a rear connecting plate and a front connecting plate which are connected, the rear connecting plate extends in the front-rear direction, the top surface of the rear connecting plate is connected with the bottom of the lifting structure, the front connecting plate extends up and down and is connected with the front side of the rear connecting plate, a first mounting block and a second mounting block which can be separated from the first mounting block in the front-rear direction are mounted on the front side of the front connecting plate, the first mounting block and the second mounting block are connected through a fastener and used for clamping a welding gun between the first mounting block and the second mounting block, and the first mounting block and the second mounting block are provided with slots for limiting the welding gun. Preferably, the guide rail extends in a straight line in the left-right direction. Thus, the welding gun moves linearly left and right.

Further, still include and be connected with the connecting seat transmission and be used for driving the connecting seat along the gliding motor of guide rail. Through setting up the motor, through electric drive, easy operation is convenient like this, and welding efficiency is higher.

The device further comprises a control board and limit sensors for sensing the sliding position of the connecting seat, wherein the limit sensors are provided with two sides which are respectively close to the guide rail, the output end of each limit sensor is electrically connected with the control board, and the control board is connected with the motor;

or/and, trigger the board is installed at the top of guide post, be provided with the micro-gap switch who is used for controlling whether welding wire conveyer carries the welding wire toward welder on the connecting seat, this micro-gap switch is located the below of triggering the board, welding set still includes the control panel, and micro-gap switch's output is connected with the control panel electricity, and the control panel links to each other with motor and welding wire conveyer respectively, and when the welding was accomplished, trigger the board and trigger micro-gap switch and make welding wire conveyer stop to carry the welding wire and make motor stall.

By arranging the limiting sensor, the connecting seat can be sensed by the limiting sensor when the connecting seat moves to a position where welding needs to be finished, so that the connecting seat is prevented from being rushed out of an effective stroke due to carelessness of operators during welding, and the welding device is prevented from being damaged;

or/and in order to prevent the welding wire from idling and feeding the welding wire in the empty state of the welding conveyor, the trigger plate and the micro switch are arranged, the trigger plate triggers the micro switch as long as the welding is finished, the motor stops running to enable the connecting base to automatically stop moving, and meanwhile the welding wire conveyor is controlled to stop feeding the welding wire.

In order to ensure that the moving path of the welding gun corresponds to the position of the connecting seam, the welding gun further comprises a positioning assembly which is arranged on the support and used for positioning the connecting seam of the workpiece to be welded, and the positioning assembly can slide left and right relative to the guide rail. The position of the connecting seam can be positioned through the positioning component, so that the workpiece is placed at a required position to ensure the accuracy of the welding position.

The positioning assembly can have various structures, preferably, the positioning assembly comprises a sliding block which is arranged on the front side of the support in a sliding mode and can slide left and right relative to the guide rail, a connecting plate connected with the sliding block, a positioning column arranged on the connecting plate, a second linear bearing which is arranged on the connecting plate and used for the positioning column to penetrate through up and down, and a cross rod which is movably arranged on the connecting plate and used for abutting against the top end of the positioning column from top to bottom, wherein the connecting plate is provided with a front extending section extending forwards and an upper extending section which is connected with the edge of the front extending section and extends upwards, the cross rod transversely penetrates through the upper extending section, and the positioning column vertically penetrates through the second linear bearing on the front extending section.

In order to further ensure that the joint of the workpieces to be welded corresponds to the movement path of the welding gun, the welding device further comprises a laser marking instrument arranged on the support, and the laser marking instrument is used for emitting a light path visible to naked eyes. The light path emitted by the laser marking instrument can be used for auxiliary positioning of the workpiece to be welded so as to place the workpiece to be welded at a position matched with the welding gun.

The technical scheme adopted by the utility model for solving the second technical problem is as follows: a welding set subassembly, includes foretell welding set, its characterized in that: the welding device also comprises a workpiece to be welded, and the workpiece to be welded is provided with a connecting seam.

Preferably, the workpiece to be welded is a casing of the box transformer substation, a connecting seam of the casing extends upwards gradually from left to right and then downwards gradually, and a projection of the connecting seam on a horizontal plane is a straight line.

Compared with the prior art, the utility model has the advantages that: through setting up the elevation structure who is used for driving welder mount pad activity from top to bottom relative to the connecting seat, this elevation structure sets up between connecting seat and welder mount pad, and when treating the work piece surface unevenness that welds like this, elevation structure drives the welder mount pad and reciprocates correspondingly, and the welder that connects correspondingly on the welder mount pad reciprocates and fills the joint seam on treating the welding work piece, and is rational in infrastructure practical.

A welding device assembly applying the welding device is also suitable for welding workpieces to be welded with uneven surfaces.

Drawings

FIG. 1 is a perspective view of a welding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view from another angle of FIG. 1;

fig. 3 is an exploded view of the guide post, the first linear bearing, the connecting seat, the welding gun mounting seat, the roller assembly, and the like.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 3, a preferred embodiment of the welding apparatus of the present invention is shown.

The welding device comprises a support 1, a connecting seat 2, a welding gun mounting seat 3, a lifting structure 4, a roller assembly 5, a tank chain cable 6, a limiting sensor 7, a motor (not shown in the figure), a rotating speed controller (not shown in the figure), a positioning assembly 8, a laser striping instrument 9 and the like.

Wherein the holder 1 has a guide rail 11. The guide rail 11 extends in a straight line from side to side, and the length of the guide rail 11 corresponds to the length of the joint of the workpieces to be welded, for example, the length of the guide rail 11 is equal to or greater than the length of the joint. In other embodiments, the shape of the guide rail 11 may also require a shape adjustment of the joint seam of the workpieces to be welded.

The connecting base 2 is arranged on the guide rail 11 in a sliding manner and can slide left and right along the guide rail 11.

A welding gun mounting seat 3 is connected to the connection seat 2, the welding gun mounting seat 3 being used for mounting a welding gun (not shown in the figure). Specifically, the welding gun mounting seat 3 includes a rear connecting plate 31 and a front connecting plate 32 connected to each other, the rear connecting plate 31 extends in the front-rear direction, the top surface of the rear connecting plate 31 is connected to the bottom of the lifting structure 4 (in this embodiment, connected to the bottom of the guide post 42), the bottom of the rear connecting plate 31 is connected to the roller assembly 5, the front connecting plate 32 extends up and down and is connected to the front side of the rear connecting plate 31, a first mounting block 33 and a second mounting block 34 capable of being separated from the first mounting block 33 in the front-rear direction are mounted on the front side of the front connecting plate 32, the first mounting block 33 and the second mounting block 34 are connected to each other by a fastener (not shown) and are used for clamping a welding gun between the first mounting block 33 and the second mounting block 34, and each of the first mounting block 33 and the second mounting block 34 has a slot 35 for limiting the welding gun. During installation, a welding gun is placed in the slot 35, and then a fastener is inserted through the threaded hole 37, for example, by a bolt or a screw, to tighten the first and second mounting blocks 33 and 34, and the welding gun is sandwiched between the first and second mounting blocks 33 and 34. In order to protect the roller assembly 5, the bottom of the welding gun mounting seat 3 is provided with a blocking part 36 with a downward convex middle part, the blocking part 36 is positioned between the roller assembly 5 and the welding gun, and the blocking part 36 is used for blocking welding slag generated when the welding gun works from spraying on the roller assembly 5.

In order to be suitable for the workpiece to be welded with the uneven surface, the lifting structure 4 is used for driving the welding gun mounting seat 3 to move up and down relative to the connecting seat 2, and the lifting structure 4 is arranged between the connecting seat 2 and the welding gun mounting seat 3. In this embodiment, the lifting structure 4 includes a first linear bearing 41 disposed on the connection seat 2, and a guide post 42 vertically penetrating through the first linear bearing 41, and the guide post 42 is connected to the welding gun mounting seat 3; the bottom of the welding gun mounting seat 3 is provided with a roller assembly 5, the roller assembly 5 is used for contacting with a workpiece to be welded, and the roller assembly 5 can move on the surface of the workpiece to be welded under the action of external force. Preferably, the first linear bearings 41 are arranged at intervals, the number of the guide posts 42 is the same as that of the first linear bearings 41, and each guide post 42 penetrates through the corresponding first linear bearing 41. Like this, wheel components 5 moves along the work piece surface of waiting to weld, drives welder mount pad 3 upper and lower position and corresponds the change, and welder also corresponds the change in welder position because of fixing at welder mount pad 3 to can be applicable to the welding work piece of surperficial unevenness.

The motor is connected with connecting seat 2 transmission and is used for driving to connect and slide along guide rail 11, and preferably, the motor adopts gear motor. The rotating speed controller is used for controlling the rotating speed of the motor. A tank chain cable 6 for supplying power to the motor is installed at the rear side of the stand 1. Through setting up the motor, like this through electric drive, it is more convenient, welding efficiency is higher, and speed controller is used for controlling motor speed, and welding speed can be according to production technology, treat material composition, the reasonable regulation of panel thickness of welded work piece like this, and tank chain cable 6 is favorable to neatly taking in the cable in order and is difficult to cause the interference in the space to other parts.

In order to prevent the connecting seat 2 from punching out an effective stroke, the connecting seat further comprises a control board and limit sensors 7 for sensing the sliding position of the connecting seat 2, the limit sensors 7 are provided with two sides which are respectively close to the guide rail 11, the output end of each limit sensor 7 is electrically connected with the control board, and the control board is connected with the motor; through setting up limit sensor 7, can be felt 7 should by limit sensor when connecting seat 2 moves the position that the welding needs to finish like this, prevent like this that the operation personnel from neglecting and leading to connecting seat 2 to dash out effective stroke when guaranteeing to weld, cause welding set to damage.

In order to prevent the welding device from idling and welding wire from being fed in an idle mode, a trigger plate 43 is installed at the top of the guide column 42, a microswitch 10 used for controlling whether a welding wire conveyor (not shown in the figure) conveys welding wires to a welding gun or not is arranged on the connecting seat 2, the microswitch 10 is positioned below the trigger plate 43, the welding device further comprises a control plate (not shown in the figure), the output end of the microswitch 10 is electrically connected with the control plate, the control plate is respectively connected with a motor and the welding wire conveyor, and when the welding is finished, the trigger plate 43 triggers the microswitch 10 to enable the welding wire conveyor to stop conveying welding wires and enable the motor to stop running. Through setting up micro-gap switch 10, for example when the joint line is from a left side to turn right earlier and upwards extend gradually and then down extend gradually, when welding set removed the position of ending soon, welding mount pad 3 moves down relative connecting seat 2, trigger plate 43 triggers micro-gap switch 10, welding set automatic stop advances, control welding wire conveyor simultaneously stops to carry the welding wire, when the joint line is other shapes, generally treat that welded work piece has certain thickness or welding work piece through anchor clamps are fixed and have the difference in height, when welding set removed the position of ending soon, welding gun mount pad 3 also had a step that falls back, also can trigger micro-gap switch 10 through trigger plate 43 promptly.

The motor also comprises an operation button for controlling the forward and reverse rotation of the motor. Therefore, the rotating direction of the motor is switched according to needs, so that the connecting seat 2 can move from left to right or from right to left.

In order to ensure that the moving path of the welding gun corresponds to the position of the joint, a positioning assembly 8 is arranged on the bracket 1 for positioning the joint, and the positioning assembly 8 can slide left and right relative to the guide rail 11. The positioning assembly 8 includes a sliding block 81 slidably disposed at the front side of the support 1 and capable of sliding left and right relative to the guide rail 11, a connecting plate 82 connected to the sliding block 81, a positioning post 83 disposed on the connecting plate 82, a second linear bearing 84 disposed on the connecting plate 82 for the positioning post 83 to pass through vertically, and a cross bar 85 movably disposed on the connecting plate 82 for vertically abutting against the top end of the positioning post 83, wherein the connecting plate 82 has a front extension 821 extending forward and an upper extension 822 connected to the edge of the front extension 821 and extending upward, the cross bar 85 transversely passes through the upper extension 822, and the positioning post 83 vertically passes through the front extension 821. By providing the slider 81, the entire positioning unit 8 can be slid right and left to an appropriate position depending on the position of the joint of the workpieces to be welded.

Laser marking instrument 9 sets up on support 1, and this laser marking instrument 9 is used for sending the light path that the naked eye is visible, and laser marking instrument 9 sends the light path and can be used to assistance-localization real-time to place the position with welder adaptation with welded work piece.

The utility model also provides a welding device assembly which comprises the welding device and a workpiece to be welded, wherein the workpiece to be welded is provided with a connecting seam. Preferably, the workpiece to be welded is a box-type transformer shell, a connecting seam of the shell gradually rises from left to right and then gradually falls, a projection of the connecting seam on a horizontal plane is a straight line, in other embodiments, the connecting seam may also be an oblique line, a projection of the oblique line on the horizontal plane is a straight line, the connecting seam may also be an arc line with a middle part protruding upwards, and a projection of the arc line on the horizontal plane is a straight line.

The construction of the welding gun and wire feeder may be as known in the art.

The principle of use and operation of the welding device assembly is as follows.

The sliding block 81 is slid to move the positioning assembly 8 to a proper position, then the cross rod 85 of the positioning assembly 8 is moved to enable the cross rod 85 to be away from the positioning column 83, so that the positioning column 83 can be moved upwards, a workpiece to be welded is placed below the positioning column 83, the cross rod 85 is moved to enable the cross rod 85 to be vertically abutted against the positioning column 83, the position of the workpiece to be welded is continuously adjusted to enable the two positioning columns 83 to be located in connecting seams of the workpiece to be welded, and because the projection of the connecting seams on the horizontal plane is a straight line, two points of the two positioning columns 83 determine a straight line. After the workpiece to be welded is moved to a required position, the cross rod 85 can be moved to enable the cross rod 85 to be away from the positioning column 83, and then the positioning column 83 is taken away, so that the positioning column 73 cannot easily cause spatial interference to the position movement of the welding gun. In addition, the laser marking instrument 9 can be opened, the laser marking instrument 9 emits a light path, and whether the workpiece to be welded is placed in place can be further determined. The welding gun is fixed to the welding gun mount 3 by being clamped between the first mounting block 33 and the second mounting block 34 so that the welding gun outlet is maintained at a fixed up-down distance from the joint line and the welding gun outlet is aligned with the joint line of the work to be welded.

Then, the motor is started, the rotating speed of the motor is adjusted through the rotating speed controller, the welding speed of the welding gun is adjusted according to needs, the motor drives the connecting seat 2 to move along the guide rail 11, and the connecting seat 2 drives the welding gun mounting seat 3 to move. When the shell of the box transformer substation is welded, the roller assembly 5 moves along the surface of the shell of the box transformer substation, drives the welding gun mounting seat 3 to correspondingly move up and down, and simultaneously, the guide post 42 moves up and down. The welding gun moves along with the welding gun mounting seat 3 and fills the melted welding wire into the connecting seam of the workpiece to be welded to form a welding seam, and the welding seam is relatively flat and uniform.

When limit sensor 7 detected the position of connecting seat 2, with signal transmission to the control panel, control panel control motor stall, connecting seat 2 can not dash out effective stroke like this, also when the welding targets in place, and connecting seat 2 can the automatic stop remove.

Through setting up trigger plate 43 and micro-gap switch 10, when the welding was accomplished like this, welding mount pad 3 moved down relative connecting seat 2, and trigger plate 43 triggers micro-gap switch 10, and welding set automatic stop advances, controls welding wire conveyer simultaneously and stops to carry the welding wire. The whole welding device can start welding by one key, automatically stops working after welding is finished, and is simple to operate and high in welding efficiency.

By pressing the motor forward and backward rotation operating button, the connecting seat 2 can move reversely when welding next time.

Claims (13)

1. A welding device, characterized by: comprises that

A bracket (1) having a guide rail (11);

the connecting seat (2) is arranged on the guide rail (11) in a sliding manner and can slide along the guide rail (11);

the welding gun mounting seat (3) is connected with the connecting seat (2), and the welding gun mounting seat (3) is used for mounting a welding gun;

the welding gun installing seat is characterized by further comprising a lifting structure (4) used for driving the welding gun installing seat (3) to move up and down relative to the connecting seat (2), wherein the lifting structure (4) is arranged between the connecting seat (2) and the welding gun installing seat (3).

2. The welding device of claim 1, wherein: the lifting structure (4) comprises a first linear bearing (41) arranged on the connecting seat (2) and a guide column (42) vertically penetrating through the first linear bearing (41), and the guide column (42) is connected with the welding gun mounting seat (3);

the welding gun installing seat is characterized in that a roller assembly (5) is arranged at the bottom of the welding gun installing seat (3), the roller assembly (5) is used for being in contact with a workpiece to be welded, and the roller assembly (5) can move on the workpiece to be welded under the action of external force.

3. The welding device of claim 2, wherein: the first linear bearings (41) are at least two and are arranged at intervals, the number of the guide columns (42) is the same as that of the first linear bearings (41), and each guide column (42) penetrates through the corresponding first linear bearing (41);

or/and the bottom of the welding gun mounting seat (3) is provided with a blocking part (36) with the middle part protruding downwards, the blocking part (36) is positioned between the roller assembly (5) and the welding gun, and the blocking part (36) is used for blocking welding slag generated when the welding gun works from being sprayed onto the roller assembly (5).

4. The welding device of claim 1, wherein: welding gun mount pad (3) are including back connecting plate (31) and preceding connecting plate (32) that link to each other, and back connecting plate (31) extends in the front and back direction, and the top surface of back connecting plate (31) links to each other with the bottom of elevation structure (4), preceding connecting plate (32) extend from top to bottom and link to each other with the front side of back connecting plate (31), and first installation piece (33) and second installation piece (34) that can separate from front to back with first installation piece (33) are installed to the front side of preceding connecting plate (32), and first installation piece (33) and second installation piece (34) link to each other through the fastener and are used for pressing from both sides welding gun between first installation piece (33) and second installation piece (34), and first installation piece (33) and second installation piece (34) all have slot (35) that are used for spacing welding gun.

5. The welding device according to any one of claims 1 to 4, wherein: the guide rail (11) extends in a straight line shape.

6. The welding device according to any one of claims 1 to 4, wherein: the device also comprises a motor which is in transmission connection with the connecting seat (2) and is used for driving the connecting seat (2) to slide along the guide rail (11).

7. The welding device of claim 6, wherein: the device is characterized by further comprising a control board and limiting sensors (7) used for sensing the sliding positions of the connecting seat (2), wherein the limiting sensors (7) are provided with two sides which are respectively close to the guide rails (11), the output ends of the limiting sensors (7) are electrically connected with the control board, and the control board is connected with the motor.

8. Welding device according to claim 2 or 3, characterized in that: trigger plate (43) is installed at the top of guide post (42), be provided with on connecting seat (2) and be used for controlling whether micro-gap switch (10) of welding wire conveyer toward welder conveying welding wire, this micro-gap switch (10) are located the below of trigger plate (43), welding set still includes the control panel, and the output and the control panel electricity of micro-gap switch (10) are connected, and the control panel links to each other with motor and welding wire conveyer respectively, and when the welding was over, trigger plate (43) and trigger micro-gap switch (10) and make welding wire conveyer stop to carry the welding wire and make the motor stall.

9. The welding device according to any one of claims 1 to 4, wherein: the welding device also comprises a positioning component (8) which is arranged on the bracket (1) and used for positioning a connecting seam of a workpiece to be welded, and the positioning component (8) can slide left and right relative to the guide rail (11).

10. The welding device of claim 9, wherein: the positioning assembly (8) comprises a sliding block (81) which is arranged on the front side of the support (1) in a sliding mode and can slide left and right relative to the guide rail (11), a connecting plate (82) connected with the sliding block (81), a positioning column (83) arranged on the connecting plate (82), a second linear bearing (84) which is arranged on the connecting plate (82) and used for enabling the positioning column (83) to penetrate through up and down, and a cross rod (85) which is movably arranged on the connecting plate (82) and used for abutting against the top end of the positioning column (83) up and down, wherein the connecting plate (82) is provided with a front extending section (821) extending forwards and an upper extending section (822) which is connected with the edge of the front extending section (821) and extends upwards, the cross rod (85) transversely penetrates through the upper extending section (822), and the positioning column (83) vertically penetrates through the second linear bearing (84) on the front extending section (821).

11. The welding device according to any one of claims 1 to 4, wherein: the welding device further comprises a laser striping instrument (9) arranged on the support (1), and the laser striping instrument (9) is used for emitting a macroscopic light path.

12. A welding device assembly comprising a welding device according to any one of claims 1 to 11, wherein: the welding device also comprises a workpiece to be welded, and the workpiece to be welded is provided with a connecting seam.

13. The welding device assembly of claim 12, wherein: the workpiece to be welded is a shell of the box transformer substation, a connecting seam of the shell extends upwards gradually from left to right and then extends downwards gradually, and the projection of the connecting seam on the horizontal plane is a straight line.

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