CN220934559U - Ceramic head welding device - Google Patents

Abstract

The utility model discloses a ceramic head welding device which comprises a workbench, a wire harness discharging assembly, a wire harness end peeling and cutting assembly, a wire harness pulling assembly, a welding operation table assembly and a ceramic head placing table assembly, wherein the wire harness discharging assembly, the wire harness end peeling and cutting assembly, the wire harness pulling assembly, the welding operation table assembly and the ceramic head placing table assembly are sequentially arranged on the workbench along a Y axis; the welding operation table assembly is provided with a ceramic head transfer assembly and a detection assembly along the outer sides of the X axis respectively, and meanwhile, the shell is arranged on the workbench and the assemblies are all arranged in the shell. The device realizes the whole-process mechanization of welding the wire harness on the ceramic head, and simultaneously detects the quality of the welded workpiece, thereby ensuring the operation quality.

Description

Ceramic head welding device

Technical Field

The utility model belongs to the technical field of automatic machining, and particularly relates to a ceramic head welding device.

Background

Chinese patent publication No. CN105959904a discloses an automatic microphone bonding wire device, which comprises a machine table, an automatic feeding mechanism of a vibrating disk, a servo positioning mechanism, an automatic wire feeding and cutting peeling mechanism, a wire transfer mechanism, a four-axis manipulator mechanism and a controller. The invention has simple structure and reasonable design, the wire rod only needs to be purchased into the wire rod of the winding when in work, the wire rod processing cost is saved, the working efficiency is high, the feeding and positioning of the microphone are all automatically completed by the machine, the CCD component accurately positions the microphone at high speed, the welding reject ratio caused by inaccurate manual feeding is reduced, the wire rod lengths of different specifications can be set according to specific use, the invention can be used for automatic welding wires of components such as the microphone, the motor and the like, and has good universality.

However, in the prior art, welding detection is not performed on the welded workpiece, and the welding quality of the workpiece cannot be ensured; meanwhile, the prior art does not disclose how to peel the two ends of the wire harness while cutting off the wire harness, so that the wire harness is complicated in processing operation, and the operation error probability is improved.

Disclosure of utility model

In view of the foregoing problems in the prior art, an object of the present utility model is to provide a ceramic head welding device.

The utility model provides the following technical scheme:

A ceramic head welding device comprises a workbench, a wire harness discharging assembly, a wire harness end peeling and cutting assembly, a wire harness pulling assembly, a welding operation table assembly and a ceramic head placing table assembly which are sequentially arranged on the workbench along a Y axis; the welding operation table assembly is provided with a ceramic head transfer assembly and a detection assembly along the outer sides of the X axis respectively, and meanwhile, the shell is arranged on the workbench and the assemblies are all arranged in the shell.

Specifically, pencil ejection of compact subassembly includes the mount pad, and movable mounting is rolled up to the line of being qualified for next round of competitions on the mount pad, and the motor passes through hold-in range subassembly and drives the line of being qualified for the next round of competitions rotatory, and the motor is installed on the mount pad simultaneously, just install the shell of rolling up on the mount pad, hold-in range subassembly is located the shell of rolling up, the pencil of the ejection of compact on the line of rolling up is rectified through pencil correction assembly, simultaneously the pencil correction assembly is installed on the mount pad.

Specifically, the wire harness end peeling and cutting assembly comprises a bottom plate, a positioning seat arranged on the bottom plate, a correction roller, a cutter assembly, a conduit fixing seat, a correction roller and an outgoing side wire beam correction assembly which are sequentially arranged on the positioning seat from one end close to the wire harness discharging assembly, wherein the conduit is arranged on the conduit fixing seat, the correction roller continues straight correction of the wire harness, then the wire harness passes through the conduit, and meanwhile, the cutter assembly cuts off the wire harness, and the cut wire harness continues to pass through the subsequent correction roller and the outgoing side wire beam correction assembly to ensure the straight of the wire harness; the cutter assembly cuts three wire harnesses, the head end of each wire harness is cut, and the tail end of each wire harness is cut two, so that the two ends of the cut wire harness are in a peeled state.

Specifically, the cutter assembly comprises a cover plate hinged on the bottom plate, two cutters are movably mounted on the cover plate through air cylinders, the back surfaces of the two cutters are contacted, the front surfaces of the cutters are provided with large prismatic openings, the large prismatic openings gradually extend to the back surfaces of the cutters in an inclined mode to form cutter tips, the cutter tips are small prismatic openings, the cutter tips of the two cutters are overlapped, and the cutters cut a wire harness through the cutter tips; meanwhile, the initial states of the two cylinders are different, wherein the initial state of one cylinder is a full stroke, the initial state of the other cylinder is a zero stroke, and meanwhile, the two cylinders are provided with magnetic switches.

Specifically, the wire harness pulling assembly comprises a first supporting seat, an electric sliding rail arranged on the first supporting seat, and a clamping jaw cylinder arranged on the electric sliding rail through a mounting plate, wherein the electric sliding rail drives the clamping jaw cylinder to move along a Y axis.

Specifically, the welding operation platform subassembly includes supporting seat two, installs the unipolar robot on supporting seat two, and the welding bench passes through the movable block and installs on unipolar robot one, evenly be equipped with a plurality of welding station on the welding bench, photoelectric sensor one installs at supporting seat two, and photoelectric sensor one position corresponds one of them welding station simultaneously, unipolar robot is driven the welding bench and is removed along the X axle, photoelectric sensor one is used for detecting whether needs welded welding station is under the welding subassembly.

Specifically, the ceramic head transfer assembly comprises a support seat III, and a triaxial module arranged on the support seat III, wherein a negative pressure suction head is arranged on the triaxial module.

Specifically, the detection assembly comprises a camera fixing frame, a camera is installed on the camera fixing frame through a camera shell, a light source is installed on the workbench through a light source frame, and the light source is located on one side of the welding operation table assembly.

Specifically, the ceramic head placing table component comprises a shelf, a ceramic head positioning placing disc positioned on the shelf through clamping blocks at four corners, a photoelectric sensor II which is arranged on the shelf and positioned outside one side of the ceramic head positioning placing disc, and a photoelectric sensor II which is used for judging whether the ceramic head positioning placing disc is placed on the shelf, the ceramic head positioning placing disc is fully filled with ceramic heads, and meanwhile, a qualified box and an NG box are arranged on the shelf.

Specifically, the welding assembly comprises a support column, a linear guide rail is arranged on the support column, a welding gun is arranged on the linear guide rail through a mounting bracket, meanwhile, the mounting bracket is movably arranged on the support column through a pushing cylinder, and the pushing cylinder is used for driving the welding gun to move along a Z axis.

The beneficial effects of the utility model are as follows:

The device realizes the whole-process mechanization of welding the wire harness on the ceramic head, and simultaneously detects the quality of the welded workpiece, thereby ensuring the operation quality.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a three-dimensional view of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a top view of the internal structure of the present utility model;

FIG. 4 is a three-dimensional view of a harness take-off assembly of the present utility model;

FIG. 5 is a schematic view of the internal structure of the harness take-off assembly of the present utility model;

FIG. 6 is a three-dimensional view of a wire harness end stripping and cutting assembly of the present utility model;

FIG. 7 is a schematic view of the internal structure of the wire harness end stripping and cutting assembly of the present utility model;

FIG. 8 is a diagram showing the positional relationship of two cutters in the present utility model;

FIG. 9 is a three-dimensional view of a wire harness pulling assembly of the present utility model;

FIG. 10 is a three-dimensional view of a welding station assembly of the present utility model;

FIG. 11 is a three-dimensional view of a ceramic head transfer assembly of the present utility model;

FIG. 12 is a three-dimensional view of a detection assembly of the present utility model;

FIG. 13 is a three-dimensional view of a ceramic head placement stage assembly of the present utility model;

FIG. 14 is a three-dimensional view of a welding assembly of the present utility model;

Marked in the figure as: 1. a work table; 2. peeling and cutting assembly for wire harness ends; 3. a harness pulling assembly; 4. welding the assembly; 5. welding a work table assembly; 6. a ceramic head transfer assembly; 7. a detection assembly; 8. a ceramic head placement stage assembly; 9. a housing; 10. a wire harness discharging assembly;

201. A bottom plate; 202. a positioning seat; 203. an outgoing line side harness correction assembly; 204. a correction roller; 205. a conduit; 206. a conduit holder; 207. a cutter assembly; 208. a cover plate;

2071. A cutter; 2072. a large prismatic mouth; 2073. a knife tip;

301. a first supporting seat; 302. an electric slide rail; 303. a mounting plate; 304. a clamping jaw cylinder;

501. A second supporting seat; 502. a single-axis robot I; 503. a moving block; 504. a first photoelectric sensor; 505. a welding table; 506. a welding station;

601. a third supporting seat; 602. a triaxial module; 603. a negative pressure suction head;

701. a camera mount; 702. a camera housing; 703. a light source; 704. a light source frame;

801. A shelf; 802. positioning a ceramic head placing disc; 803. a qualified box; 804. NG box; 805. a second photoelectric sensor;

1001. A mounting base; 1002. a wire outlet coil; 1003. a motor; 1004. a harness correction assembly; 1005. a timing belt assembly; 1006. and (5) unwinding the shell.

Detailed Description

As shown in fig. 2, X in the drawing refers to the X-axis in the coordinate system, representing the transport direction of the can feeding conveyor 1, Y refers to the Y-axis in the coordinate system, and Z refers to the Z-axis in the coordinate system.

As shown in fig. 1 to 3, the utility model provides a ceramic head welding device, which comprises a workbench 1, a wire harness discharging component 10, a wire harness end peeling and cutting component 2, a wire harness pulling component 3, a welding component 4, a welding operation table component 5 and a ceramic head placing table component 8 which are sequentially arranged on the workbench 1 along a Y axis; the welding operation table assembly 5 is provided with a ceramic head transfer assembly 6 and a detection assembly 7 along the outer sides of the X axis respectively, and meanwhile, a shell 9 is arranged on the workbench 1, and the ceramic head transfer assembly and the detection assembly are all arranged in the shell 9.

Referring to fig. 4 and 5, the wire harness discharging assembly 10 includes a mounting seat 1001, a wire outlet coil 1002 movably mounted on the mounting seat 1001, a motor 1003 drives the wire outlet coil 1002 to rotate through a synchronous belt assembly 1005, meanwhile, the motor 1003 is mounted on the mounting seat 1001, a wire outlet housing 1006 is mounted on the mounting seat 1001, the synchronous belt assembly 1005 is located in the wire outlet housing 1006, a wire harness discharged from the wire outlet coil 1002 is corrected through a wire harness correction assembly 1004, and meanwhile, the wire harness correction assembly 1004 is mounted on the mounting seat 1001.

The wire harness correction assembly 1004 comprises a wire roller mounting seat and a plurality of wire rollers which are sequentially and alternately arranged on the wire roller mounting seat, and the positions of the wire rollers ensure the straight correction of the wire harness discharged from the wire coil 1002.

Referring to fig. 6 to 8, the wire harness end peeling and cutting assembly 2 comprises a base plate 201, a positioning seat 202 arranged on the base plate 201, a correction roller 204, a cutter assembly 207, a wire conduit fixing seat 206, a correction roller 204 and an outgoing wire side wire harness correction assembly 203 which are sequentially arranged on the positioning seat 202 from one end close to the wire harness discharging assembly 10, wherein the wire conduit 205 is arranged on the wire conduit fixing seat 206, the correction roller 204 continues the straight correction of the wire harness, then the wire harness passes through the wire conduit 205, the cutter assembly 207 cuts off the wire harness, and the cut wire harness continues to pass through the subsequent correction roller 204 and the outgoing wire side wire harness correction assembly 203 to ensure the straight of the wire harness; wherein the cutter assembly 207 cuts three wires for each wire harness, cuts one wire harness head end, cuts two wire harness tail ends, thereby ensuring that both ends of the cut wire harness are peeled.

Specifically, the cutter assembly 207 includes a cover plate 208 hinged on the bottom plate 201, two cutters 2071 are movably mounted on the cover plate 208 through cylinders, please refer to fig. 8, the back surfaces of the two cutters 2071 are contacted, a large prismatic opening 2072 is arranged on the front surface of the cutter 2071, the large prismatic opening 2072 gradually extends to the back surface of the cutter 2071 in an inclined manner to form a cutter tip end 2073, the cutter tip end 2073 is a small prismatic opening, the cutter tip ends 2073 of the two cutters 2071 are overlapped, and the cutter 2071 cuts a wire harness through the cutter tip ends 2073; meanwhile, the initial states of the two cylinders are different, wherein the initial state of one cylinder is a full stroke, and the initial state of the other cylinder is a zero stroke, so that cutting operation of the cutter 2071 on the wire harness can be guaranteed when the cylinders are started.

Wherein, the magnetic switch is installed on both cylinders to can adjust cylinder operation distance, make the cutting degree of depth that can change cutter 2071, thereby can make cutter 2071 cut off the pencil skin alone. Therefore, when cutting the wire harness, the cutter 2071 cuts the wire harness skin on one end of the wire harness, then the cutter 2071 cuts the wire harness skin when reaching the other end of the wire harness, the first cut cuts the wire harness skin only, the second cut cuts the wire harness, and the wire harness is always in a discharging running state when the cutter 2071 works, so that both ends of the cut wire harness are peeled.

Specifically, the outgoing-line harness correction assembly 203 is a harness correction assembly 1004 that is flipped 90 degrees.

Referring to fig. 9, the wire harness pulling assembly 3 includes a first support base 301, an electric slide rail 302 mounted on the first support base 301, and a clamping jaw cylinder 304 mounted on the electric slide rail 302 through a mounting plate 303, wherein the electric slide rail 302 drives the clamping jaw cylinder 304 to move along the Y axis.

The wire harness pulling assembly 3 is used for clamping the cut wire harness, and then the wire harness is driven to move to the welding workbench assembly 5.

Referring to fig. 10, the welding table assembly 5 includes a second support 501, a first single-axis robot 502 mounted on the second support 501, a welding table 505 mounted on the first single-axis robot 502 by a moving block 503, a plurality of welding stations 506 uniformly arranged on the welding table 505, a first photoelectric sensor 504 mounted on the second support 501, and a second photoelectric sensor 504 positioned corresponding to one of the welding stations 506, wherein the first single-axis robot 502 drives the welding table 505 to move along the X axis, and the first photoelectric sensor 504 is used for detecting whether the welding station 506 to be welded is located under the welding assembly.

In the initial state, the welding station 506 is located right below the ceramic head transferring assembly 6, the ceramic head transferring assembly 6 places the ceramic head on the welding station 506, then the first single-shaft robot 502 is started, the ceramic head transferring assembly 6 sequentially fills the welding station 506 with the ceramic head, then the first single-shaft robot 502 drives the welding station 506 to move right below the welding assembly 4, the wire harness pulling assembly 3 pulls the cut wire harness to the welding station 506, then the welding station 506 welds the wire harness on the ceramic head, then the first single-shaft robot 502 is started, the welding assembly 4 sequentially welds the ceramic head on the welding station 506 with the wire harness, finally the first single-shaft robot 502 is started, the first single-shaft robot 502 drives the welding station 506 to move right below the detecting assembly 7, and the detecting assembly 7 detects the welded workpiece.

Referring to fig. 11, the ceramic head transfer assembly 6 includes a third support base 601, and a triaxial module 602 mounted on the third support base 601, and a negative pressure suction head 603 is mounted on the triaxial module 602.

After the triaxial module 602 is opened, the negative pressure suction head 603 can be moved to a position right above the ceramic head placement table assembly 8, and then the ceramic head is sucked and transferred to the welding table assembly 5.

Referring to fig. 12, the inspection assembly 7 includes a camera mount 701, a camera is mounted on the camera mount 701 through a camera housing 702, a light source 703 is mounted on the table 1 through a light source mount 704, and the light source 703 is located at one side of the welding table assembly 5.

When the welding station 506 is moved to the position of the detection assembly 7 by the welding workbench assembly 5, the state of the welded workpiece is photographed by a camera, and whether the welding of the workpiece is qualified is judged.

Referring to fig. 13, the ceramic head placing table assembly 8 includes a shelf 801, a ceramic head positioning placing tray 802 positioned on the shelf 801 by means of clamping blocks at four corners, and a second photoelectric sensor 805 mounted on the shelf 801 and located outside one side of the ceramic head positioning placing tray 802, wherein the second photoelectric sensor 805 is used for judging whether the shelf 801 is provided with the ceramic head positioning placing tray 802, the ceramic head positioning placing tray 802 is fully filled with ceramic heads, and meanwhile, the shelf 801 is provided with a qualified box 803 and a NG box 804.

Wherein the ceramic head transfer assembly 6 is used to transfer ceramic heads within the ceramic head positioning tray 802 to the welding station 506; and finally, if the detection component 7 judges that the workpiece is qualified, the ceramic head transfer component 6 transfers the workpiece into the qualified box 803, and if the detection component 7 judges that the workpiece is unqualified, the ceramic head transfer component 6 transfers the workpiece into the NG box 804.

Referring to fig. 14, the welding assembly 4 includes a pillar 401, a linear guide rail 402 mounted on the pillar 401, a welding gun 405 mounted on the linear guide rail 402 by a mounting bracket 404, and the mounting bracket 404 movably mounted on the pillar 401 by a pushing cylinder 403, wherein the pushing cylinder 403 is used for driving the welding gun 405 to move along the Z axis.

The motor 1003, cylinder, motorized sled 302, jaw cylinder 304, single axis robot one 502, photoelectric sensor one 504, tri-axis module 602, negative pressure suction head 603, camera, photoelectric sensor two 805, push cylinder 403, and welding gun 405 are communicatively coupled to the control panel.

The control panel contains a PLC controller, the PLC controller can be used as a programmable numerical control system, the PLC is used as a central control system, the touch screen is used for realizing the program input and operation control of the whole machine, and the full automation of the transportation process is realized. The control system can be used as a system for connecting each execution element to move according to a logic track, and the execution elements are controlled to operate according to required operation steps through programming.

The working principle of the utility model is as follows:

Firstly, the wire harness is discharged by the wire harness discharging assembly 10, then the wire harness is cut by the wire harness end peeling and cutting assembly 2, meanwhile, the two ends of the wire harness are peeled off, so that the to-be-welded part inside the wire harness is exposed, the wire harness is conveniently and subsequently welded on the ceramic head, the wire harness is pulled to the welding operation table assembly 5 by the wire harness pulling assembly 3, meanwhile, the ceramic head on the ceramic head placing table assembly 8 is transferred to the welding operation table assembly 5 by the ceramic head transferring assembly 6, the wire harness is welded on the ceramic head by the welding assembly 4, finally, whether the welded workpiece is qualified or not is judged by the detecting assembly 7, and then the workpiece is placed in the ceramic head placing table assembly 8.

The device realizes the whole-process mechanization of welding the wire harness on the ceramic head, and simultaneously detects the quality of the welded workpiece, thereby ensuring the operation quality.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The ceramic head welding device is characterized by comprising a workbench (1), a wire harness discharging assembly (10), a wire harness end peeling and cutting assembly (2), a wire harness pulling assembly (3), a welding assembly (4), a welding operation table assembly (5) and a ceramic head placing table assembly (8) which are sequentially arranged on the workbench (1) along a Y axis; the welding operation table assembly (5) is provided with a ceramic head transfer assembly (6) and a detection assembly (7) along the outer sides of the two sides of the X axis respectively, meanwhile, the shell (9) is arranged on the workbench (1), and the assemblies are all arranged in the shell (9).

2. The ceramic head welding device according to claim 1, wherein the wire harness discharging assembly (10) comprises a mounting seat (1001), a wire harness outgoing coil (1002) movably mounted on the mounting seat (1001), the motor (1003) drives the wire harness outgoing coil (1002) to rotate through a synchronous belt assembly (1005), meanwhile, the motor (1003) is mounted on the mounting seat (1001), an outgoing coil shell (1006) is mounted on the mounting seat (1001), the synchronous belt assembly (1005) is located in the outgoing coil shell (1006), a wire harness outgoing from the wire harness outgoing coil (1002) is corrected through a wire harness correction assembly (1004), and meanwhile, the wire harness correction assembly (1004) is mounted on the mounting seat (1001).

3. A ceramic head welding apparatus according to claim 1 or 2, wherein the wire harness end peeling and cutting assembly (2) comprises a base plate (201), a positioning seat (202) mounted on the base plate (201), a correction roller (204), a cutter assembly (207), a wire conduit fixing seat (206), a correction roller (204) and an outgoing wire harness correction assembly (203) mounted on the positioning seat (202) in order from one end near the wire harness discharging assembly (10), wherein the wire conduit (205) is mounted on the wire conduit fixing seat (206), the correction roller (204) continues the straight correction of the wire harness, then the wire harness passes through the wire conduit (205), the cutter assembly (207) cuts off the wire harness, and the cut wire harness continues to pass through the subsequent correction roller (204) and the outgoing wire harness correction assembly (203) to ensure the straight correction of the wire harness; wherein the cutter assembly (207) cuts three down each wire harness, the head end of the wire harness cuts down, and the tail end of the wire harness cuts down, thereby ensuring that both ends of the cut wire harness are in a peeled state.

4. A ceramic head welding device according to claim 3, wherein the cutter assembly (207) comprises a cover plate (208) hinged on a bottom plate (201), two cutters (2071) are movably mounted on the cover plate (208) through air cylinders, the back surfaces of the two cutters (2071) are contacted, a large prismatic opening (2072) is formed on the front surface of the cutter (2071), the large prismatic opening (2072) gradually extends to the back surface of the cutter (2071) to form a cutter tip (2073), the cutter tip (2073) is a small prismatic opening, the cutter tip ends (2073) of the two cutters (2071) are overlapped, and the cutter cutters (2071) cut a wire harness through the cutter tip (2073); meanwhile, the initial states of the two cylinders are different, wherein the initial state of one cylinder is a full stroke, the initial state of the other cylinder is a zero stroke, and meanwhile, the two cylinders are provided with magnetic switches.

5. The ceramic head welding device according to claim 1, wherein the wire harness pulling assembly (3) comprises a first supporting seat (301), an electric sliding rail (302) arranged on the first supporting seat (301), a clamping jaw cylinder (304) is arranged on the electric sliding rail (302) through a mounting plate (303), and the electric sliding rail (302) drives the clamping jaw cylinder (304) to move along a Y axis.

6. The ceramic head welding device according to claim 1, wherein the welding workbench assembly (5) comprises a second supporting seat (501), a first single-shaft robot (502) arranged on the second supporting seat (501), the welding table (505) is arranged on the first single-shaft robot (502) through a moving block (503), a plurality of welding stations (506) are uniformly arranged on the welding table (505), a first photoelectric sensor (504) is arranged on the second supporting seat (501), meanwhile, the position of the first photoelectric sensor (504) corresponds to one of the welding stations (506), the first single-shaft robot (502) drives the welding table (505) to move along the X axis, and the first photoelectric sensor (504) is used for detecting whether the welding station (506) to be welded is located right below the welding assembly.

7. The ceramic head welding device according to claim 1, wherein the ceramic head transfer assembly (6) comprises a support seat III (601), and a triaxial module (602) mounted on the support seat III (601), and a negative pressure suction head (603) is mounted on the triaxial module (602).

8. A ceramic head welding device according to claim 1, characterized in that the detection assembly (7) comprises a camera mount (701), the camera being mounted on the camera mount (701) by means of a camera housing (702), the light source (703) being mounted on the work table (1) by means of a light source mount (704), said light source (703) being located on one side of the welding work table assembly (5).

9. The ceramic head welding device according to claim 1, wherein the ceramic head placing table assembly (8) comprises a shelf (801), a ceramic head positioning placing disc (802) positioned on the shelf (801) through clamping blocks at four corners, a photoelectric sensor II (805) arranged on the shelf (801) and positioned outside one side of the ceramic head positioning placing disc (802), and the photoelectric sensor II (805) is used for judging whether the ceramic head positioning placing disc (802) is placed on the shelf (801), the ceramic head positioning placing disc (802) is fully filled with ceramic heads, and meanwhile, a qualified box (803) and a NG box (804) are arranged on the shelf (801).

10. A ceramic head welding device according to claim 1, characterized in that the welding assembly (4) comprises a strut (401), a linear guide rail (402) mounted on the strut (401), a welding gun (405) is mounted on the linear guide rail (402) through a mounting bracket (404), and the mounting bracket (404) is movably mounted on the strut (401) through a pushing cylinder (403), wherein the pushing cylinder (403) is used for driving the welding gun (405) to move along the Z axis.