A welding equipment for assembling and welding the lower housing in a poison filtering unit

Abstract

The present invention discloses a welding equipment for assembling and welding the lower shell in a poison filtration unit, belonging to the technical field of production of civil air defense project equipment. The welding equipment for assembling and welding the lower shell in the poison filtration unit includes a robot welding assembly, a position-changing mechanism, and a welding and assembling fixture arranged on the position-changing mechanism; the robot welding assembly is located on one side of the position-changing mechanism; the position-changing mechanism includes an installation base frame, a slewing bearing assembly is arranged on the installation base frame, an installation tray is arranged at the top of the slewing bearing assembly, and a welding and assembling fixture is symmetrically arranged on each side of the installation tray respectively. The position-changing mechanism is used to change the position of the welding and assembling fixture; the welding and assembling fixture fixes the lower shell workpiece; the welding equipment for assembling and welding the lower shell in the poison filtration unit reduces manual operation through mechanized and automated welding operations, can continuously and efficiently complete the assembly and welding operations of the lower shell workpiece, without frequent manual intervention, significantly shortens the production cycle of a single poison filtration unit, and improves the overall production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of production of civil air defense engineering equipment, and particularly relates to a welding equipment for assembling the lower shell in a filter poison unit. Background Art

[0002] In the civil air defense industry, as an important part of the protection system, the performance of the filter absorber is directly related to the effect of personnel safety protection. As a key component of the filter poison unit, its manufacturing process is complex and has high requirements for processing accuracy. As the basic structural part of the filter poison unit, the assembly and welding processes of the lower shell are particularly crucial. In the traditional processing method, the assembly and welding of the inner buckle plate and the outer buckle plate of the lower shell mainly rely on manual resistance welding. In this process, the operator needs to hold the lower shell workpiece for a long time to operate, which not only has a large labor intensity, but also the manual operation easily leads to uneven welding quality, such as uneven welds, welding deformation and other problems, affecting the overall performance and sealing of the filter poison unit. Summary of the Invention

[0003] Aiming at the deficiencies in the above background art, the present invention aims to provide a welding equipment for assembling the lower shell in a filter poison unit, so as to solve the problems of time-consuming, laborious and uncontrollable welding quality existing in traditional manual welding.

[0004] In order to achieve the above invention purpose, the technical scheme adopted by the present invention is as follows:

[0005] A welding equipment for assembling the lower shell in a filter poison unit is provided, which includes a robot welding assembly, a position-changing mechanism and a welding and assembling tooling arranged on the position-changing mechanism; the robot welding assembly is located on one side of the position-changing mechanism; the position-changing mechanism includes a mounting chassis, a slewing bearing assembly is arranged on the mounting chassis, an installation tray is arranged on the top of the slewing bearing assembly, and one welding and assembling tooling is symmetrically arranged on each side of the installation tray. The position-changing mechanism is used to change the position of the welding and assembling tooling; the welding and assembling tooling fixes the lower shell workpiece.

[0006] Further, each welding and assembling tooling includes a fixed support arranged on the installation tray and two lateral clamping assemblies symmetrically arranged on both sides of the fixed support respectively;

[0007] The fixed support is in a cuboid bracket structure, the bottom of the fixed support is fixedly connected with the upper end surface of the installation tray, and a rotary clamping cylinder is arranged at each of the two top corners on the inner top of the fixed support; corner cylinders are arranged on both side surfaces and the top surface in the width direction of the fixed support; a circumferential clamping assembly is connected to the piston rod of each of the rotary clamping cylinder and the corner cylinder; 4 magnetic limit positioning seats corresponding to the lower shell are arranged on each side of the fixed seat;

[0008] Each of the lateral clamping assemblies includes two parallel and spaced rails. A first sliding support and a second sliding support are respectively arranged on the two rails. The first sliding support is located outside the second sliding support. An active pressing plate assembly for tightly contacting the side of the lower housing workpiece is arranged on the top of the first sliding support. A positioning inner support plate for installing and fixing the lower housing workpiece is vertically and fixedly arranged on the second sliding support. The shape and size of the positioning inner support plate match the internal size of the lower housing workpiece.

[0009] A driving cylinder is arranged at the bottom of the fixed support. A traction shaft is connected to the piston rod of the driving cylinder. The middle parts of the lower end faces of the first sliding support and the second sliding support are respectively connected to the traction shaft through connecting seats.

[0010] Further, each of the circumferential clamping assemblies includes a hinge seat. One end of the hinge seat is fixedly connected to the piston rod of the rotary clamping cylinder or the angle cylinder. The other end of the hinge seat is connected with a clamping rod through a rotating shaft. The middle part of each clamping rod is hinged to the hinge seat. Clamping screws are fixedly connected to both ends of each clamping rod.

[0011] Further, a plurality of bearings are arranged on both sides in the width direction of the positioning inner support plate. The inner ring of each bearing is fixed to the side surface of the positioning inner support plate, and the outer ring of the bearing is in rolling contact with the inner wall surface of the lower housing workpiece.

[0012] Further, each of the active pressing plate assemblies includes a pressing plate arranged on the outer side surface of the positioning inner support plate. Both sides of the bottom of the pressing plate are hinged to the upper end surface of the first sliding support through a rotating hinge. Both sides of the top of the pressing plate are hinged with a support rod. The other end of each support rod is arranged away from the pressing plate and is hinged to the upper end surface of the first sliding support.

[0013] Further, the length of each support rod is adjustable.

[0014] Further, the traction shaft is connected to the piston rod of the driving cylinder through a horizontal rotating joint.

[0015] Further, the traction shaft has a stepped shaft structure. The stepped part of the traction shaft is in clearance fit with the connecting seat on the lower end surface of the second sliding support. The non-stepped part of the traction shaft is fixedly connected to the connecting seat on the lower end surface of the first sliding support through a nut.

[0016] Further, a baffle is vertically arranged at the middle position between the two welding and alignment jigs. The bottom of the baffle is fixedly connected to the upper end surface of the installation tray.

[0017] Further, conductive plates are arranged on both side surfaces of each fixed support. The conductive plates are electrically connected to the welding machine pole wires.

[0018] Compared with manually welding the lower housing workpiece, the beneficial effects of the present invention are as follows:

[0019] 1. In the lower housing assembly and welding equipment of a filter unit in the present invention, through mechanized and automated welding operations, manual operations are almost completely eliminated, and the assembly and welding operations of the lower housing workpiece can be continuously and efficiently completed without frequent manual intervention, significantly shortening the production cycle of a single filter unit and improving the overall production efficiency.

[0020] 2. In the lower housing assembly and welding equipment of a filter unit in the present invention, during the process of assembling and welding the lower housing workpiece, it can ensure the precise alignment and positioning of the lower housing workpiece, avoiding problems such as dimensional deviation and shape distortion caused by improper manual operation, thereby improving the manufacturing accuracy; at the same time, the robot welding assembly can weld and fix the two side surfaces and the top seam of the lower housing workpiece, and can ensure the consistency and stability of the welding quality.

[0021] 3. In the lower housing assembly and welding equipment of a filter unit in the present invention, a circumferential clamping assembly is provided on the piston rods of the rotary clamping cylinder and the corner cylinder. The clamping rods and clamping screws in the circumferential clamping assembly can dynamically rotate at a small angle following the side surface of the uneven lower housing workpiece in contact with them to adapt to the situation where the left and right side surfaces of the two lower housing workpieces are uneven and the top angles of the two lower housing workpieces are inconsistent.

[0022] 4. In the lower housing assembly and welding equipment of a filter unit in the present invention, multiple bearings on the positioning inner support plate guide the lower housing workpiece, facilitating the insertion of the lower housing workpiece.

[0023] 5. In the lower housing assembly and welding equipment of a filter unit in the present invention, the traction shaft is of a stepped shaft structure. During the movement of the driving cylinder, it can freely slide at the stepped shaft, so that the positioning inner support plate on the second sliding support remains stationary first, and the movable pressing plate assembly on the first sliding support moves together with the traction shaft. When the traction shaft reaches the sliding limit position at the stepped shaft, the positioning inner support plate and the movable pressing plate assembly are driven by the traction shaft to move together, thereby realizing the non-equidistant movement of the movable pressing plate assembly and the positioning inner support plate; when the piston rod of the driving cylinder extends, the gap between the positioning inner support plate and the movable pressing plate assembly is increased, facilitating the installation of the two lower housing workpieces on the positioning inner support plate; when the piston rod of the driving cylinder retracts, the movable pressing plate assembly first moves with the traction shaft, and the pressing plate presses the two lower housing workpieces against the positioning inner support plate, avoiding the deviation of the positions of the two lower housing workpieces during the movement.

[0024] 6. A welding equipment for butt - welding the lower housing in the gas - filtering unit. The baffle plate is used to block the welding arc light, so as to avoid the operator from being harmed by the welding arc light when the robot welding assembly is welding; the conductive plate is electrically connected with the electrode wire of the welding machine, which can better form a welding current loop, ensure the stability of the welding arc, and prevent the metal wire mesh inside the lower housing from being damaged due to welding sparking. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. is a three - dimensional structure schematic diagram of the welding equipment for butt - welding the lower housing in the gas - filtering unit.

[0026] Figure 2 FIG. is a front - view structure schematic diagram of the welding equipment for butt - welding the lower housing in the gas - filtering unit.

[0027] Figure 3 FIG. is a three - dimensional structure schematic diagram of a single welding butt - joint tooling clamping the lower housing workpiece.

[0028] Figure 4 FIG. is a three - dimensional structure schematic diagram of a single welding butt - joint tooling releasing the lower housing workpiece.

[0029] Figure 5 FIG. is a three - dimensional structure schematic diagram of the lateral clamping assembly.

[0030] Figure 6 FIG. is a three - dimensional structure schematic diagram of the circumferential clamping assembly.

[0031] Figure 7 FIG. is a connection structure schematic diagram of the traction shaft and the driving cylinder.

[0032] Among them, 1. Robot welding assembly;

[0033] 2. Positioning mechanism; 21. Installation base frame; 22. Slewing bearing assembly; 23. Installation tray;

[0034] 3. Welding butt - joint tooling; 31. Fixed support;

[0035] 32. Lateral clamping assembly; 321. Slide rail; 322. First sliding support; 323. Second sliding support;

[0036] 324. Movable pressing plate assembly; 3241. Pressing plate; 3242. Support rod;

[0037] 325. Positioning inner support plate; 326. Driving cylinder; 327. Traction shaft; 328. Bearing;

[0038] 33. Rotary clamping cylinder; 34. Rotary angle cylinder;

[0039] 35. Circumferential clamping assembly; 351. Hinge seat; 352. Clamping rod; 353. Clamping screw;

[0040] 4. Lower housing workpiece;

[0041] 5. Horizontal rotating joint;

[0042] 6. Baffle plate;

[0043] 7. Conductive plate.

[0044] 8. Magnetic force limit positioning seat Specific implementation manner

[0045] The following describes the specific implementation manner of the present invention to facilitate the understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation manner. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0046] As Figures 1 to 2 shown, the present invention provides a welding equipment for assembling and welding the lower housing in a gas filter unit. The meaning of assembling and welding the lower housing is to weld the inner buckle plate and the outer buckle plate of the lower housing into a whole. The main welding positions during welding are the joints on both sides and the top of the lower housing. For the convenience of description, in this embodiment, the inner buckle plate and the outer buckle plate of the lower housing are simply referred to as the lower housing workpiece 4. The welding equipment for assembling and welding the lower housing in the gas filter unit includes a robot welding assembly 1, a positioning mechanism 2, and a welding and assembling tooling 3 provided on the positioning mechanism 2; the robot welding assembly 1 is located on one side of the positioning mechanism 2; the positioning mechanism 2 includes a mounting base frame 21, a slewing bearing assembly 22 is provided on the mounting base frame 21, a mounting tray 23 is provided on the top of the slewing bearing assembly 22, and one welding and assembling tooling 3 is symmetrically provided on each side of the mounting tray 23. The positioning mechanism 2 is used to change the position of the welding and assembling tooling 3; the welding and assembling tooling 3 fixes the lower housing workpiece 4.

[0047] In this embodiment, the slewing bearing assembly 22 is composed of components such as a slewing bearing, a reduction gearbox, a driving gear, and a servo motor. The servo motor provides the power source, and the slewing bearing and the reduction gearbox increase and reduce the torque output by the motor, so as to achieve the purpose of changing the position of the welding and assembling tooling 3 at both ends of the mounting tray 23.

[0048] The working principle of the lower shell assembly welding equipment in the gas filter unit is as follows: the lower shell workpiece 4 to be welded is fixed on the welding assembly tool 3 manually or by a robot, and then the robot welding assembly 1 welds the two side surfaces and the top seam of the lower shell workpiece 4 on the welding assembly tool 3. During the welding process, another lower shell workpiece 4 can be placed on another welding assembly tool 3 manually or by a robot. When the welding is completed, the displacement mechanism 2 rotates 180° to move the lower shell workpiece 4 on another welding assembly tool 3 to the bottom of the robot welding assembly 1, and the robot welding assembly 1 welds it and removes the welded lower shell workpiece 4 from the welding assembly tool 3. The lower shell assembly welding equipment in the gas filter unit almost completely eliminates manual operation through mechanized and automated welding operations, and can continuously and efficiently complete the assembly and welding operations of the lower shell workpiece 4 without frequent manual intervention, significantly shortening the production cycle of a single gas filter unit and improving the overall production efficiency.

[0049] like Figures 3 to 7 As shown, specifically, as a specific setting method of the welding assembly tool 3, each of the welding assembly tool 3 includes a fixed support 31 arranged on the mounting tray 23 and two lateral clamping components 32 symmetrically arranged on both sides of the fixed support 31. The setting of the two lateral clamping components 32 can realize the simultaneous clamping of two lower shell workpieces 4.

[0050] As shown in the figure, the fixed support 31 is a rectangular support structure, and a conductive plate 7 and a magnetic limiting seat 8 are provided on both sides of each fixed support 31. The conductive plate 7 is in direct contact with the outer side of the lower shell workpiece 4 to ensure the stability of the welding arc and prevent the metal wire mesh inside the lower shell from being damaged due to welding sparks. It is also possible to prevent the lower shell workpiece 4 and the welding group from being damaged by power during the welding process. The magnetic limiting seat 8 is directly opposite to the bolts of the lower shell workpiece 4, and the bolts are adsorbed by magnetic force to achieve positioning, providing accurate positioning for robot welding.

[0051] The bottom of the fixed support 31 is fixedly connected to the upper end surface of the mounting tray 23, and a rotary clamping cylinder 33 is respectively provided at the top corners on both sides of the top of the fixed support 31; the two side surfaces and the top surface in the width direction of the fixed support 31 are both provided with an angle cylinder 34; the piston rods of the rotary clamping cylinder 33 and the angle cylinder 34 are both connected with a circumferential clamping assembly 35; the circumferential clamping assembly 35 is used to clamp the joints on the two side surfaces and the top of the lower shell workpiece 4.

[0052] Preferably but not limited thereto, each of the circumferential clamping assemblies 35 includes a hinge seat 351. One end of the hinge seat 351 is fixedly connected to the piston rod of the rotary clamping cylinder 33 or the angle cylinder 34. The other end of the hinge seat 351 is connected with a clamping rod 352 through a rotating shaft. The middle of each clamping rod 352 is hinged to the hinge seat 351, and a clamping screw 353 is fixedly connected to both ends of each clamping rod 352. By arranging the circumferential clamping assembly 35 on the piston rods of the rotary clamping cylinder 33 and the angle cylinder 34, the clamping rod 352 and the clamping screw 353 in the circumferential clamping assembly 35 can dynamically rotate at a small angle following the side surface of the uneven lower housing workpiece 4 in contact therewith, so as to adapt to the uneven left and right side surfaces of the two lower housing workpieces 4 and the inconsistent apex angles of the two lower housing workpieces 4.

[0053] Each of the lateral clamping assemblies 32 includes two parallel and spaced rails 321. A first sliding support 322 and a second sliding support 323 are respectively arranged on the two rails 321. The first sliding support 322 is located outside the second sliding support 323. An active pressing plate assembly 324 for tightly contacting the side surface of the lower housing workpiece 4 is arranged on the top of the first sliding support 322; a positioning inner support plate 325 for installing and fixing the lower housing workpiece 4 is vertically and fixedly arranged on the second sliding support 323. The shape and size of the positioning inner support plate 325 match the internal size of the lower housing workpiece 4; a driving cylinder 326 is arranged at the bottom of the fixed support 31. A traction shaft 327 is connected to the piston rod of the driving cylinder 326. The middle parts of the lower end faces of the first sliding support 322 and the second sliding support 323 are respectively connected to the traction shaft 327 through a connecting seat. The traction shaft 327 is connected to the piston rod of the driving cylinder 326 through a horizontal rotary joint 5. The setting of the horizontal rotary joint 5 makes the connection between the traction shaft 327 and the piston rod of the driving cylinder 326 a flexible connection, which can relatively rotate on the horizontal plane to eliminate the problem of non-parallelism during the movement process.

[0054] Such as Figure 7As shown, specifically, the traction shaft 327 has a stepped shaft structure, and the stepped part of the traction shaft 327 is in clearance fit with the connecting seat on the lower end surface of the second sliding support 323; the non-stepped part of the traction shaft 327 is in interference fit with the connecting seat on the lower end surface of the first sliding support 322. During the movement of the driving cylinder 326, it can slide freely at the stepped shaft, so that the positioning inner support plate 325 on the second sliding support 323 remains stationary first, and the movable pressing plate assembly 324 on the first sliding support 322 moves together with the traction shaft 327. When the traction shaft 327 reaches the sliding limit position at the stepped shaft, the positioning inner support plate 325 and the movable pressing plate assembly 324 are driven by the traction shaft 327 to move together, thereby realizing the non-equidistant movement of the movable pressing plate assembly 324 and the positioning inner support plate 325; when the piston rod of the driving cylinder 326 extends, the gap between the positioning inner support plate 325 and the movable pressing plate assembly 324 is increased, facilitating the installation of two lower housing workpieces 4 on the positioning inner support plate 325; when the piston rod of the driving cylinder 326 retracts, the movable pressing plate assembly 324 first moves with the traction shaft 327, and the pressing plate 3241 presses the two lower housing workpieces 4 against the positioning inner support plate 325, preventing the two lower housing workpieces 4 from deviating in position during the movement.

[0055] Preferably but not limited to, a plurality of bearings 328 are provided on both sides in the width direction of the positioning inner support plate 325. The inner ring of each bearing 328 is fixed to the side surface of the positioning inner support plate 325, and the outer ring of the bearing 328 is in rolling contact with the inner wall surface of the lower housing workpiece 4. The plurality of bearings 328 guide the lower housing workpiece 4, facilitating the insertion of the lower housing workpiece 4.

[0056] Specifically, as a specific setting method of the movable pressing plate assembly 324, the movable pressing plate assembly 324 includes a pressing plate 3241 provided on the outer side surface of the positioning inner support plate 325. Both sides of the bottom of the pressing plate 3241 are hinged to the upper end surface of the first sliding support 322 through a rotating hinge. Both sides of the top of the pressing plate 3241 are hinged with a support rod 3242. The other end of each support rod 3242 is arranged away from the pressing plate 3241 and is hinged to the upper end surface of the first sliding support 322. The length of each support rod 3242 is adjustable, and the inclination angle of the pressing plate 3241 can be adjusted by adjusting the length of the support rod 3242 to make the pressing plate 3241 parallel to the lower housing workpiece 4; the adjustable length of the support rod 3242 can be realized by means of a telescopic rod or a threaded connection.

[0057] The working process of the welding and alignment tooling 3 is as follows: the piston rods of the rotary clamping cylinder 33, the corner cylinder 34, and the driving cylinder 326 extend. The driving cylinder 326 drives the traction shaft 327 to drive the first sliding support 322 and the second sliding support 323 to move away from the fixed support 31. Since the traction shaft 327 has a stepped shaft structure, the gap between the positioning inner support plate 325 and the pressing plate 3241 is very large. Then, the lower housing workpiece 4 is inserted between the two positioning inner support plates 325. Next, the piston rod of the driving cylinder 326 retracts, first driving the first sliding support 322 and the pressing plate 3241 thereon to move towards the positioning inner support plate 325. The pressing plate 3241 abuts against the outer end face of the lower housing workpiece 4 and presses the lower housing workpiece 4 against the positioning inner support plate 325. When the traction shaft 327 reaches the sliding limit position at the stepped shaft, the positioning inner support plate 325 and the movable pressing plate assembly 324 are driven by the traction shaft 327 to move together until the outer end face of the lower housing workpiece 4 abuts tightly against the conductive plate 7 on the fixed support 31, and then the driving cylinder 326 stops. Finally, the piston rods of the rotary clamping cylinder 33 and the corner cylinder 34 retract, driving the circumferential clamping assembly 35 to clamp the joints on both sides and the top of the lower housing workpiece 4, realizing the positioning and fixing of the lower housing workpiece 4, which is convenient for the subsequent automatic welding of the robot welding assembly 1.

[0058] Furthermore, a baffle 6 is vertically arranged at the middle position between the two welding and alignment toolings 3. The bottom of the baffle 6 is fixedly connected to the upper end face of the mounting tray 23. The baffle 6 is used to block the welding arc light, preventing the operator from being harmed by the welding arc light when the robot welding assembly 1 is welding.

[0059] In summary, the present invention provides a welding device for the left and right baffles of the lower housing in a poison filter unit. Through mechanized and automated welding operations, manual operations are almost completely eliminated. It can continuously and efficiently complete the alignment and welding operations of the lower housing workpiece 4 without frequent manual intervention, significantly shortening the production cycle of a single poison filter unit, improving the overall production efficiency, solving the problems of time-consuming, laborious, and uncontrollable quality existing in traditional manual welding, improving the production efficiency, and ensuring the consistency and stability of product quality.

Claims

1. A welding device for the lower shell assembly of a gas filter unit, characterized in that: It comprises a robot welding assembly, a displacement mechanism and a welding assembly tooling arranged on the displacement mechanism; the robot welding assembly is located on one side of the displacement mechanism; the displacement mechanism comprises a mounting chassis, a slewing support assembly is arranged on the mounting chassis, a mounting tray is arranged on the top of the slewing support assembly, one welding assembly tooling is symmetrically arranged on both sides of the mounting tray, and the displacement mechanism is used to change the position of the welding assembly tooling; the welding assembly tooling fixes the lower shell workpiece; each of the welding assembly tooling comprises a fixed support arranged on the mounting tray and two lateral clamping assemblies symmetrically arranged on both sides of the fixed support; The fixed support is a rectangular bracket structure, the bottom of the fixed support is fixedly connected to the upper end surface of the mounting tray, and a rotary clamping cylinder is respectively arranged at the top corners on both sides of the top of the fixed support; the two side surfaces and the top surface in the width direction of the fixed support are both provided with an angle cylinder; the piston rods of the rotary clamping cylinder and the angle cylinder are both connected to a circumferential clamping assembly; four magnetic limiting seats corresponding to the positions of the lower shell bolts are arranged on both sides of the fixed seat; Each of the lateral clamping assemblies comprises two parallel and spaced slide rails, a first sliding support and a second sliding support are respectively provided on the two slide rails, the first sliding support is located on the outside of the second sliding support, a movable pressing plate assembly for tightly contacting the side surface of the lower shell workpiece is provided on the top of the first sliding support; a positioning inner support plate for mounting and fixing the lower shell workpiece is vertically fixed on the second sliding support, and the shape and size of the positioning inner support plate match the internal size of the lower shell workpiece; A driving cylinder is provided at the bottom of the fixed support, a traction shaft is connected to the piston rod of the driving cylinder, and the middle parts of the lower end surfaces of the first sliding support and the second sliding support are connected to the traction shaft through a connecting seat; The traction shaft is connected to the piston rod of the driving cylinder through a horizontal rotating joint; the traction shaft is a stepped shaft structure, and the stepped part of the traction shaft is clearance-matched with the connecting seat on the lower end surface of the second sliding support; the non-stepped part of the traction shaft is fixedly connected to the connecting seat on the lower end surface of the first sliding support through a nut.

2. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: Each of the circumferential clamping assemblies includes an articulated seat, one end of the articulated seat is fixedly connected to the piston rod of the rotary clamping cylinder or the angle cylinder, the other end of the articulated seat is connected to a clamping rod via a rotating shaft, the middle part of each clamping rod is hinged to the articulated seat, and both ends of each clamping rod are fixedly connected to a clamping screw.

3. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: A plurality of bearings are arranged on both sides of the positioning inner support plate in the width direction, the inner ring of each bearing is fixed to the side surface of the positioning inner support plate, and the outer ring of the bearing is in rolling contact with the inner wall surface of the lower shell workpiece.

4. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: The movable pressure plate assemblies include a pressure plate arranged on the outer side surface of the positioning inner support plate, both sides of the bottom of the pressure plate are hinged to the upper end surface of the first sliding support through a rotating hinge, and both sides of the top of the pressure plate are hinged with a support rod, and the other end of each support rod is arranged away from the pressure plate and is hinged to the upper end surface of the first sliding support.

5. The lower shell assembly welding equipment of the gas filter unit according to claim 4 is characterized in that: The length of each support rod is adjustable.

6. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: A shielding plate is vertically arranged at the middle position between the two welding group toolings, and the bottom of the shielding plate is fixedly connected to the upper end surface of the mounting tray.

7. The lower shell assembly welding equipment of the gas filter unit according to any one of claims 1 to 6, characterized in that: Conductive plates are arranged on both side surfaces of each fixed support, and the conductive plates are electrically connected with the welding machine pole wires.

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