Flange welding device

Abstract

The present invention relates to the technical field of flange welding, and discloses a flange welding device, including a mechanical arm, a laser welding head is fixedly installed on the top of the mechanical arm, a crank mechanism is fixedly installed on the outside of the laser welding head, a turntable is fixedly connected to the bottom side of the mechanical arm, and an adjustment mechanism is fixedly installed on the outside of the muzzle of the laser welding head; the crank mechanism includes a motion platform, a telescopic component, a regulating mechanism, and a supporting mechanism, the outer side of the lower part of the laser welding head is fixedly connected to the motion platform, the outer side of the upper part of the laser welding head is fixedly connected to a circular ring block, the outer side of the circular ring block is fixedly connected to a supporting mechanism, and the other end of the supporting mechanism is fixedly connected to a fixed platform. Through the coordinated action of the turntable, telescopic component, regulating mechanism, and supporting mechanism, the present invention enables the laser welding head to form a crank-type welding trajectory with adjustable weld size for the welding trajectory of the flange.

Description

Technical Field

[0001] The invention relates to the technical field of flange welding, in particular to a flange welding device. Background Art

[0002] The main welding forms of flanges are flat welding flanges and butt welding flanges. Flat welding flanges refer to flanges that are connected to containers or pipes with corner welds. Butt welding flanges are a type of pipe fitting, which refers to flanges with necks and round pipe transitions and are butt-welded to pipes.

[0003] However, most of the flange automatic welding equipment on the market now, among which laser welding accounts for the majority, is to place the flange on the fixture and clamp it, drive the laser welding head to dock with the flange welding part through the mechanical arm, drive the flange to rotate at a constant speed through the turntable, and weld in a fixed way with the laser welding head. There are also a few welding devices, and the laser welding head is equipped with an in-plane swing mechanism to realize swing welding; to improve the welding quality;

[0004] Among them, flange crank welding is that the welder relies on the arc swing of the wrist to make the welding nozzle roll and swing in a fan shape, and uses the surface tension of the molten droplet to fill the groove. This welding method has the advantages of high welding qualification rate and beautiful shape, but this welding method basically relies on welders with rich welding experience to complete, which makes it unable to improve welding efficiency and cannot be widely used. Summary of the invention

[0005] The purpose of the present invention is to provide a flange welding device to solve the problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a flange welding device, comprising a mechanical arm, a laser welding head is fixedly installed on the top of the mechanical arm, a crank mechanism is fixedly installed on the outside of the laser welding head, a turntable is fixedly connected to the bottom side of the mechanical arm, and an adjustment mechanism is fixedly installed on the outside of the muzzle of the laser welding head;

[0007] The crank mechanism includes a motion platform, a telescopic component, a regulating mechanism, and a supporting mechanism. The motion platform is fixedly connected to the outer side of the lower part of the laser welding head, a circular ring block is fixedly connected to the outer side of the upper part of the laser welding head, and the supporting mechanism is fixedly connected to the outer side of the circular ring block. The other end of the supporting mechanism is fixedly connected to the fixed platform. The evenly distributed telescopic components are fixedly connected between the motion platform and the fixed platform, and the regulating mechanism is fixedly installed on the telescopic components.

[0008] Through the cooperation of the turntable, telescopic assembly, regulating mechanism and supporting mechanism, the laser welding head forms a crank-type welding trajectory for the flange plate, the size of the weld can be adjusted.

[0009] Furthermore, the turntable includes a fixed seat, a motor, a guide, a gear, a gear ring, a rotating ring, and an annular guide rail. A fixed seat is provided on the lower side of the robotic arm, and the upper end of the fixed seat is used for sleeve flange. A motor is fixedly installed on the bottom of the fixed seat, and a gear is fixedly connected to the output end of the motor. A gear is meshed with a gear ring on the outer side of the gear, and a rotating ring is fixedly connected to the upper side of the gear ring. Two groups of guides are fixedly connected to the lower side of the rotating ring and on the inner side of the gear ring. An annular guide rail is provided on the inner side of the guide, and the guide rolls on the inner side of the annular guide rail. The annular guide rail is fixedly connected to the fixed seat, and the robotic arm is fixedly connected to the rotating ring.

[0010] The flange to be welded (either flat welding flange or butt welding flange) is sleeved on the upper end of the fixing seat. The external control system controls the mechanical arm to drive the laser welding head so that the welding gun muzzle of the laser welding head is connected to the welding part of the flange at a 45-degree cutting angle.

[0011] Start the motor 1, the motor 1 drives the gear 1 to rotate, and the gear 1 meshes with the gear ring 1 to rotate in a circular manner. Since the guide member is composed of a roller and a mounting frame, the mounting frame is fixedly connected to the rotating ring, and the roller rolls on the circular guide rail, the guide member guides the circular guide rail while the gear ring 1 drives the circular guide rail to rotate, thereby stabilizing its rotation;

[0012] The rotating ring drives the mechanical arm on it to rotate synchronously and uniformly while rotating, so that the welding gun muzzle of the laser welding head performs uniform circular motion around the welding part of the flange;

[0013] Furthermore, the telescopic assembly includes a cylinder body, a base, a piston block, a piston rod, and a connecting block. The lower side of the fixed platform is fixedly connected to the base, the inner side of the base is rotatably connected to the cylinder body, the inner side of the cylinder body is slidably connected to the piston block, the inner side of the piston block is fixedly connected to the piston rod, the piston rod penetrates the side wall of the cylinder body and extends to the outside of the cylinder body, the end of the piston rod away from the piston block is rotatably connected to the connecting block, and the connecting block is fixedly connected to the moving platform.

[0014] Furthermore, the regulating mechanism includes a fixed cylinder, a coil, a magnetic block, an air outlet nozzle, a moving valve stem, an air inlet pipe, and an air inlet nozzle. The outer side of the cylinder body is fixedly connected to a fixed cylinder via a mounting plate, the inner side of the fixed cylinder is fixedly connected to a coil, the inner side of the fixed cylinder is slidably connected to a moving valve stem, the end of the moving valve stem close to the coil is fixedly connected to a magnetic block, the outer side of the moving valve stem is fixedly connected to three conical blocks, the outer side of the fixed cylinder is connected to an air inlet pipe and two air outlet nozzles, the air inlet pipe corresponds to the conical block in the middle, the air outlet nozzle corresponds to the conical block on the outer side, the outer side of the fixed cylinder and on the opposite sides of the air inlet pipe and the air outlet nozzle are connected to two air inlet nozzles, and a plurality of annular cavities are opened on the inner side of the fixed cylinder, and the plurality of annular cavities respectively correspond to the air outlet nozzle, the air inlet nozzle, and the air inlet pipe.

[0015] Since the air intake pipe is connected with the external air supply device, the external air supply device allows compressed gas to be introduced into the interior of the fixed cylinder. Since the moving valve stem is provided with three conical blocks, and the fixed cylinder is provided with annular cavities corresponding to the three conical blocks, when the compressed gas enters the fixed cylinder, due to the blocking effect of the three conical blocks, the gas enters an air intake nozzle, and then enters one side of the cylinder body through a hose, thereby pushing the piston block to drive the piston rod to extend outward or retract inward, and the gas on the other side of the cylinder body is discharged outward from the air outlet nozzle on one side through another hose and another air intake nozzle.

[0016] Control the coils at various locations to be fed with intermittent positive and negative currents in a cross-type manner. After the coils are fed with positive and negative currents, magnetic field forces that attract or repel the magnetic blocks are generated, thereby driving the intake pipe to intermittently move back and forth, so that the compressed gas entering the cylinder body changes back and forth on both sides of the piston block, thereby driving the piston rod to regularly expand and contract. Since the piston rods at various locations expand and contract in a cross-type manner, the motion platform is driven to rotate in a crank-like manner.

[0017] The motion platform drives the laser welding head fixedly connected to it to rotate synchronously in a crank-like manner, thereby realizing automatic crank-like welding of the flange.

[0018] Furthermore, the supporting mechanism includes a connecting seat, a rotating block, a fixed block, a mounting cylinder, and a moving rod. The upper side of the fixed platform is fixedly connected with a uniformly distributed connecting frame, the annular block and the connecting frame are fixedly connected with a connecting seat on opposite sides, the other end of the connecting seat is rotatably connected with a rotating block, the outer side of the rotating block is rotatably connected with a fixed block, one side of the fixed block away from the connecting seat is fixedly connected with a mounting cylinder, and the other side of the fixed block away from the connecting seat is fixedly connected with a moving rod, and the moving rod slides on the inner side of the mounting cylinder.

[0019] While the laser welding head is cranking, the moving rod slides inside the mounting tube, and the fixed block, the rotating block, and the connecting seat follow the rotation, thereby assisting the laser welding head to perform stable cranking rotation.

[0020] Furthermore, the adjustment mechanism includes an adjustment component and a trigger component. The adjustment component is fixedly connected to the outer side of the muzzle of the laser welding head. The adjustment component is fixedly connected to a uniformly distributed trigger component, and the trigger component corresponds to the telescopic component.

[0021] Furthermore, the adjustment component includes motor 2, gear 2, a fixing ring, gear ring 2, a mounting ring, gear 3, a limiting block, and a rack. A cover plate is fixedly connected to the outer side of the muzzle of the laser welding head, motor 2 is fixedly connected to the upper side of the cover plate, gear 2 is fixedly connected to the output end of motor 2, gear ring 2 is meshed with the lower outer side of the gear 2, a mounting ring is provided on the upper side of the gear ring 2, a fixing ring is fixedly connected to the lower side of the mounting ring, and gear ring 2 rotates between the mounting ring and the inner side of the fixing ring.

[0022] Furthermore, the inner side of the gear ring 2 is meshed with an evenly distributed gear 3, the upper side of the gear 3 is rotatably connected to the cover plate, the upper outer side of the gear 3 is meshed with a rack, the upper side of the mounting ring is fixedly connected with a limiting block, the mounting ring and the limiting block are provided with a sliding groove corresponding to the rack, and the rack slides in the sliding groove.

[0023] The adjustment mechanism corresponds to the angle between the flange plane and the vertical plane. When the size of the weld is desired, the motor 2 is started, the motor 2 drives the gear 2 to rotate, the gear 2 meshes and drives the gear ring 2 to rotate, the gear ring 2 meshes and drives the gear 3 to rotate while rotating, the gear 3 meshes and drives the racks at various locations to extend and retract, the weld becomes larger when it is extended outward, and the weld becomes smaller when it is retracted inward;

[0024] Furthermore, the trigger assembly includes a connecting tube, a spring, contact one, contact two, a movable rod, and a force block. The upper side of the rack is fixedly connected to the connecting tube, the inner side of the connecting tube is fixedly connected to contact one, the inner side of the connecting tube is slidably connected to contact two, the side of contact two away from contact one is fixedly connected to the movable rod, the side of the movable rod away from contact two is fixedly connected to the force block, and the outer side of the movable rod is sleeved with a spring.

[0025] Contact 1 and contact 2 are multi-function switches, which trigger the instruction to change the direction of the current flowing into the coil through contact.

[0026] Furthermore, the contact point 1 and the contact point 2 are electrically connected to the coil, and the two air outlet nozzles are respectively connected to the air ports at both ends of the cylinder body through hoses.

[0027] When the laser welding head is cranked, it drives the force blocks in various places to move synchronously. When the force blocks gradually come into contact with the flange surface, the spring is compressed, thereby pushing contact point 2 to contact contact point 1. Since contact point 2 and contact point 1 are electrically connected to the coil, the direction of the current passing through the coil and the time of the intermittent change are controlled, so that the crank movement of the laser welding head is highly matched with the welding part of the flange, thereby improving the quality of automated crank-style welding.

[0028] Compared with the prior art, the present invention provides a flange welding device, which has the following beneficial effects:

[0029] 1. The flange welding device, through the cooperation between the turntable, the mechanical arm and the crank mechanism, realizes the automatic welding of the flange with a crank welding trajectory, which changes the current situation that the flange crank welding technology needs to rely on welders with rich welding experience to complete, enables the flange crank welding technology to be used on a large scale, improves the welding efficiency of the flange crank welding, and improves the welding quality of the flange.

[0030] 2. The flange welding device, through the cooperation of the crank mechanism and the adjustment mechanism, can control the meshing of the three gears to drive the racks at various locations to extend and retract according to the required weld size. The outward extension corresponds to a larger weld, and the inward retraction corresponds to a smaller weld, thereby achieving the purpose of freely adjusting the weld size. At the same time, according to the characteristics of the individual flange, the crank movement amplitude is adaptively matched, so that the crank movement of the laser welding head 3 is highly matched with the welding part of the flange, thereby improving the quality of automated crank welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the cutaway three-dimensional structure of the fixing seat of the present invention;

[0033] Figure 3 It is a schematic diagram of the three-dimensional structure of the mechanical arm of the present invention;

[0034] Figure 4 It is a schematic diagram of the three-dimensional structure of the laser welding head of the present invention;

[0035] Figure 5 It is a three-dimensional structural schematic diagram of the crank mechanism of the present invention;

[0036] Figure 6 It is a schematic diagram of the exploded three-dimensional structure of the motion platform of the present invention;

[0037] Figure 7 It is a schematic diagram of the exploded three-dimensional structure of the telescopic assembly of the present invention;

[0038] Figure 8 It is a schematic diagram of the cutaway three-dimensional structure of the control mechanism of the present invention;

[0039] Fig. 9 It is a schematic diagram of a cutaway three-dimensional structure of the support mechanism of the present invention;

[0040] Fig.10 It is a three-dimensional structural schematic diagram of the adjustment mechanism of the present invention;

[0041] Fig.11 It is a schematic diagram of the exploded three-dimensional structure of the adjustment component of the present invention;

[0042] Fig.12 It is a schematic diagram of the three-dimensional structure of the trigger component of the present invention;

[0043] Fig.13 It is a schematic diagram of the crank-type welding trajectory of the present invention.

[0044] In the figure: 1. Robotic arm; 2. Turntable; 21. Fixed seat; 22. Motor 1; 23. Guide; 24. Gear 1; 25. Gear ring 1; 26. Rotating ring; 27. Annular guide; 3. Laser welding head; 4. Crank mechanism; 41. Motion platform; 42. Telescopic assembly; 421. Cylinder body; 422. Base; 423. Piston block; 424. Piston rod; 425. Connecting block; 43. Control mechanism; 431. Fixed cylinder; 432. Coil; 433. Magnetic block; 434. Air outlet nozzle; 435. Motion valve stem; 436. Air intake pipe; 437 , air inlet nozzle; 44, fixed platform; 45, supporting mechanism; 451, connecting seat; 452, rotating block; 453, fixed block; 454, mounting tube; 455, moving rod; 5, adjusting mechanism; 51, adjusting assembly; 511, motor two; 512, gear two; 513, fixing ring; 514, gear ring two; 515, mounting ring; 516, gear three; 517, limiting block; 518, rack; 52, trigger assembly; 521, connecting tube; 522, spring; 523, contact one; 524, contact two; 525, movable rod; 526, force block. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0046] See also Figure 1-Figure 13A flange welding device comprises a mechanical arm 1, a laser welding head 3 is fixedly mounted on the top of the mechanical arm 1, and is characterized in that a crank mechanism 4 is fixedly mounted on the outer side of the laser welding head 3, a turntable 2 is fixedly connected to the bottom side of the mechanical arm 1, and an adjustment mechanism 5 is fixedly mounted on the outer side of the muzzle of the laser welding head 3;

[0047] The crank mechanism 4 includes a motion platform 41, a telescopic assembly 42, a regulating mechanism 43, and a supporting mechanism 45. The motion platform 41 is fixedly connected to the outer side of the lower part of the laser welding head 3, a circular ring block is fixedly connected to the outer side of the circular ring block, and the supporting mechanism 45 is fixedly connected to the outer side of the circular ring block. The other end of the supporting mechanism 45 is fixedly connected to a fixed platform 44. The telescopic assembly 42 is evenly distributed and fixedly connected between the motion platform 41 and the fixed platform 44, and the regulating mechanism 43 is fixedly installed on the telescopic assembly 42.

[0048] Through the cooperation of the turntable 2, the telescopic assembly 42, the regulating mechanism 43, and the supporting mechanism 45, the laser welding head 3 forms a crank-type welding trajectory for the flange plate, the size of the weld can be adjusted.

[0049] Furthermore, the turntable 2 includes a fixed seat 21, a motor 22, a guide 23, a gear 24, a gear ring 25, a rotating ring 26, and an annular guide rail 27. The fixed seat 21 is arranged on the lower side of the robot arm 1, and the upper end of the fixed seat 21 is used for sleeve flange, and the motor 22 is fixedly installed on the bottom of the fixed seat 21, and the output end of the motor 22 is fixedly connected with the gear 24, and the outer side of the gear 24 is meshed with the gear ring 25, and the upper side of the gear ring 25 is fixedly connected with the rotating ring 26, and two groups of guide members 23 are fixedly connected to the lower side of the rotating ring 26 and on the inner side of the gear ring 25, and the inner side of the guide member 23 is provided with an annular guide rail 27, and the guide member 23 rolls on the inner side of the annular guide rail 27, and the annular guide rail 27 is fixedly connected to the fixed seat 21, and the robot arm 1 is fixedly connected to the rotating ring 26.

[0050] The flange to be welded, either a flat welding flange or a butt welding flange, is sleeved on the upper end of the fixing seat 21, and the external control system controls the mechanical arm 1 to drive the laser welding head 3, so that the welding gun muzzle of the laser welding head 3 is connected to the welding part of the flange at a 45-degree cutting angle;

[0051] Start the motor 22, the motor 22 drives the gear 24 to rotate, the gear 24 meshes and drives the gear ring 25 to rotate in a circular manner while rotating, because the guide member 23 is composed of a roller and a mounting frame, the mounting frame is fixedly connected to the rotating ring 26, and the roller rolls on the circular guide rail 27, so that the guide member 23 guides the circular guide rail 27 while the gear ring 25 drives the circular guide rail 27 to rotate, thereby stabilizing its rotation;

[0052] The rotating ring 26 drives the mechanical arm 1 thereon to rotate synchronously and uniformly while rotating, so that the welding gun muzzle of the laser welding head 3 performs uniform circular motion around the welding part of the flange;

[0053] Furthermore, the telescopic assembly 42 includes a cylinder body 421, a base 422, a piston block 423, a piston rod 424, and a connecting block 425. The base 422 is fixedly connected to the lower side of the fixed platform 44, the inner side of the base 422 is rotatably connected to the cylinder body 421, the inner side of the cylinder body 421 is slidably connected to the piston block 423, the inner side of the piston block 423 is fixedly connected to the piston rod 424, the piston rod 424 penetrates the side wall of the cylinder body 421 and extends to the outside of the cylinder body 421, the end of the piston rod 424 away from the piston block 423 is rotatably connected to the connecting block 425, and the connecting block 425 is fixedly connected to the moving platform 41.

[0054] Furthermore, the regulating mechanism 43 includes a fixed cylinder 431, a coil 432, a magnetic block 433, an air outlet nozzle 434, a moving valve stem 435, an air inlet pipe 436, and an air inlet nozzle 437. The outer side of the cylinder body 421 is fixedly connected to the fixed cylinder 431 through a mounting plate, the inner side of the fixed cylinder 431 is fixedly connected to the coil 432, the inner side of the fixed cylinder 431 is slidably connected to the moving valve stem 435, the end of the moving valve stem 435 close to the coil 432 is fixedly connected to the magnetic block 433, and the outer side of the moving valve stem 435 is fixedly connected to the magnetic block 433. Three conical blocks are fixedly connected on the side, and the outside of the fixed cylinder 431 is connected with an air inlet pipe 436 and two air outlet nozzles 434. The air inlet pipe 436 corresponds to the conical block in the middle, and the air outlet nozzles 434 correspond to the conical blocks on the outside. The outside of the fixed cylinder 431 and on the opposite sides of the air inlet pipe 436 and the air outlet nozzles 434 are connected with two air inlet nozzles 437. A number of annular cavities are opened on the inside of the fixed cylinder 431, and the several annular cavities correspond to the air outlet nozzles 434, the air inlet nozzles 437 and the air inlet pipe 436, respectively.

[0055] Since the air inlet pipe 436 is connected to the external air supply device, the external air supply device allows compressed gas to be introduced into the interior of the fixed cylinder 431. Since the moving valve stem 435 is provided with three conical blocks, and the fixed cylinder 431 is provided with annular cavities corresponding to the three conical blocks, when the compressed gas enters the fixed cylinder 431, due to the blocking effect of the three conical blocks, the gas enters an air inlet nozzle 437, and then enters one side of the cylinder body 421 through a hose, thereby pushing the piston block 423 to drive the piston rod 424 to extend outward or retract inward, and the gas on the other side of the cylinder body 421 is discharged outward from the air outlet nozzle 434 on one side through another hose and another air inlet nozzle 437.

[0056] Control the coils 432 at various locations to be fed with intermittently changing positive and negative currents in a cross-type manner. After the positive and negative currents are fed into the coils 432, magnetic field forces that attract or repel the magnetic block 433 are generated, thereby driving the intake pipe 436 to intermittently move back and forth, so that the compressed gas entering the cylinder body 421 changes back and forth on both sides of the piston block 423, thereby driving the piston rod 424 to regularly expand and contract. Since the piston rods 424 at various locations expand and contract in a cross-type manner, the motion platform 41 is driven to rotate in a crank-like manner.

[0057] The motion platform 41 drives the laser welding head 3 fixedly connected thereto to rotate synchronously in a crank-like manner, thereby realizing automatic crank-like welding of the flange.

[0058] Furthermore, the supporting mechanism 45 includes a connecting seat 451, a rotating block 452, a fixed block 453, a mounting tube 454, and a moving rod 455. The upper side of the fixed platform 44 is fixedly connected with a uniformly distributed connecting frame, the annular block and the connecting frame are fixedly connected with the connecting seat 451 on the opposite side, the other end of the connecting seat 451 is rotatably connected with the rotating block 452, the outer side of the rotating block 452 is rotatably connected with the fixed block 453, one side of the fixed block 453 away from the connecting seat 451 is fixedly connected with the mounting tube 454, and the other side of the fixed block 453 away from the connecting seat 451 is fixedly connected with the moving rod 455, and the moving rod 455 slides on the inner side of the mounting tube 454.

[0059] While the laser welding head 3 is being cranked, the moving rod 455 slides inside the mounting tube 454, and the fixed block 453, the rotating block 452, and the connecting seat 451 follow the rotation, thereby assisting the laser welding head 3 to be cranked stably.

[0060] Furthermore, the adjustment mechanism 5 includes an adjustment component 51 and a trigger component 52. The adjustment component 51 is fixedly connected to the outer side of the muzzle of the laser welding head 3. The adjustment component 51 is fixedly connected to the evenly distributed trigger components 52. The trigger component 52 corresponds to the telescopic component 42.

[0061] Furthermore, the adjustment component 51 includes a motor 2 511, a gear 2 512, a fixing ring 513, a gear ring 2 514, a mounting ring 515, a gear 3 516, a limiting block 517, and a rack 518. A cover plate is fixedly connected to the outer side of the muzzle of the laser welding head 3, a motor 2 511 is fixedly connected to the upper side of the cover plate, a gear 2 512 is fixedly connected to the output end of the motor 2 511, a gear ring 2 514 is meshed with the outer lower part of the gear 2 512, a mounting ring 515 is provided on the upper side of the gear ring 2 514, a fixing ring 513 is fixedly connected to the lower side of the mounting ring 515, and the gear ring 2 514 rotates between the mounting ring 515 and the inner side of the fixing ring 513.

[0062] Furthermore, the inner side of the gear ring 2 514 is meshed with an evenly distributed gear 3 516, the upper side of the gear 3 516 is rotatably connected to the cover plate, the upper outer side of the gear 3 516 is meshed with a rack 518, and the upper side of the mounting ring 515 is fixedly connected with a limiting block 517, and the mounting ring 515 and the limiting block 517 are provided with sliding grooves corresponding to the rack 518, and the rack 518 slides in the sliding grooves.

[0063] The adjusting mechanism 5 corresponds to the angle between the flange plane and the vertical plane. When the size of the weld is to be obtained, the motor 2 511 is controlled to be started, the motor 2 511 drives the gear 2 512 to rotate, the gear 2 512 meshes and drives the gear ring 2 514 to rotate, the gear ring 2 514 meshes and drives the gear 3 516 to rotate while rotating, the gear 3 516 meshes and drives the racks 518 at various locations to extend and retract, the outward extension corresponds to a larger weld, and the inward retraction corresponds to a smaller weld;

[0064] Furthermore, the trigger assembly 52 includes a connecting tube 521, a spring 522, a contact one 523, a contact two 524, a movable rod 525, and a force block 526. The upper side of the rack 518 is fixedly connected to the connecting tube 521, the inner side of the connecting tube 521 is fixedly connected to the contact one 523, the inner side of the connecting tube 521 is slidably connected to the contact two 524, the side of the contact two 524 away from the contact one 523 is fixedly connected to the movable rod 525, the side of the movable rod 525 away from the contact two 524 is fixedly connected to the force block 526, and the outer side of the movable rod 525 is sleeved with a spring 522.

[0065] Contact 1 523 and contact 2 524 are multifunctional switches, which trigger instructions for changing the direction of the current flowing into the coil 432 through contact.

[0066] Furthermore, the first contact 523 and the second contact 524 are electrically connected to the coil 432 , and the two air outlet nozzles 434 are respectively connected to the air ports at both ends of the cylinder body 421 through hoses.

[0067] When the laser welding head 3 is cranked, it drives the force blocks 526 at various locations to move synchronously. When the force blocks 526 gradually come into contact with the flange surface, the spring 522 is compressed, thereby pushing contact 2 524 to contact contact 1 523. Since contact 2 524 and contact 1 523 are electrically connected to the coil 432, the direction of the current passing into the coil 432 and the time of the intermittent change are controlled, so that the crank movement of the laser welding head 3 is highly matched with the welding part of the flange, thereby improving the quality of automated crank-style welding.

[0068] The specific usage and function of this embodiment are as follows:

[0069] When in use, firstly, the flange to be welded (either flat welding flange or butt welding flange) is sleeved on the upper end of the fixing seat 21, and the external control system controls the mechanical arm 1 to drive the laser welding head 3, so that the welding gun muzzle of the laser welding head 3 is connected to the welding part of the flange at a 45-degree cutting angle;

[0070] Start the motor 22, the motor 22 drives the gear 24 to rotate, the gear 24 meshes and drives the gear ring 25 to rotate in a circular manner while rotating, because the guide member 23 is composed of a roller and a mounting frame, the mounting frame is fixedly connected to the rotating ring 26, and the roller rolls on the circular guide rail 27, so that the guide member 23 guides the circular guide rail 27 while the gear ring 25 drives the circular guide rail 27 to rotate, thereby stabilizing its rotation;

[0071] The rotating ring 26 drives the mechanical arm 1 thereon to rotate synchronously and uniformly while rotating, so that the welding gun muzzle of the laser welding head 3 performs uniform circular motion around the welding part of the flange;

[0072] At the same time, since the air inlet pipe 436 is connected to the external air supply device, the external air supply device allows compressed gas to be introduced into the interior of the fixed cylinder 431. Since the moving valve stem 435 is provided with three conical blocks, and the fixed cylinder 431 is provided with annular cavities corresponding to the three conical blocks, when the compressed gas enters the fixed cylinder 431, due to the blocking effect of the three conical blocks, the gas enters an air inlet nozzle 437, and then enters one side of the cylinder body 421 through a hose, thereby pushing the piston block 423 to drive the piston rod 424 to extend outward or retract inward, and the gas on the other side of the cylinder body 421 is discharged outward from the air outlet nozzle 434 on one side through another hose and another air inlet nozzle 437.

[0073] The external system controls the coils 432 at various locations to be fed with intermittently changing positive and negative currents in a cross-type manner. After the positive and negative currents are fed into the coils 432, a magnetic field force is generated that attracts or repels the magnetic block 433, thereby driving the intake pipe 436 to intermittently move back and forth, so that the compressed gas entering the cylinder body 421 changes back and forth on both sides of the piston block 423, thereby driving the piston rod 424 to regularly expand and contract. Since the piston rods 424 at various locations are cross-typed and regularly expanded and contracted, the motion platform 41 is driven to rotate in a crank-like manner.

[0074] The motion platform 41 drives the laser welding head 3 fixedly connected thereto to rotate synchronously in a crank-like manner, thereby realizing automatic crank-like welding of the flange.

[0075] After the adjustment mechanism 5 is equipped, the adjustment mechanism 5 corresponds to the angle between the flange plane and the vertical plane. When the size of the weld is to be obtained, the motor 2 511 is controlled to be started, the motor 2 511 drives the gear 2 512 to rotate, the gear 2 512 meshes and drives the gear ring 2 514 to rotate, the gear ring 2 514 meshes and drives the gear 3 516 to rotate while rotating, the gear 3 516 meshes and drives the racks 518 at various locations to extend and retract, the outward extension corresponds to a larger weld, and the inward retraction corresponds to a smaller weld;

[0076] When the laser welding head 3 is cranked, the force blocks 526 at various locations are driven to move synchronously. When the force blocks 526 gradually contact the flange surface, the spring 522 is compressed, thereby pushing the second contact 524 to contact the first contact 523. Since the second contact 524 and the first contact 523 are electrically connected to the coil 432, the direction of the current passing into the coil 432 and the time of the intermittent change are controlled, so that the cranking movement of the laser welding head 3 and the welding part of the flange are highly matched, thereby improving the quality of automated cranking welding;

[0077] While the laser welding head 3 is being cranked, the moving rod 455 slides inside the mounting tube 454, and the fixed block 453, the rotating block 452, and the connecting seat 451 follow the rotation, thereby assisting the laser welding head 3 to be cranked stably.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flange welding device, comprising a mechanical arm (1), a laser welding head (3) being fixedly mounted on the top end of the mechanical arm (1), characterized in that: A crank mechanism (4) is fixedly mounted on the outer side of the laser welding head (3), a turntable (2) is fixedly connected to the bottom side of the mechanical arm (1), and an adjustment mechanism (5) is fixedly mounted on the outer side of the muzzle of the laser welding head (3); The crank mechanism (4) comprises a motion platform (41), a telescopic assembly (42), a regulating mechanism (43), and a supporting mechanism (45); the motion platform (41) is fixedly connected to the outer side of the lower part of the laser welding head (3); a circular ring block is fixedly connected to the outer side of the upper part of the laser welding head (3); the supporting mechanism (45) is fixedly connected to the outer side of the circular ring block; the other end of the supporting mechanism (45) is fixedly connected to a fixed platform (44); uniformly distributed telescopic assemblies (42) are fixedly connected between the motion platform (41) and the fixed platform (44); and the regulating mechanism (43) is fixedly mounted on the telescopic assembly (42); Through the coordinated action of the turntable (2), the telescopic assembly (42), the regulating mechanism (43), and the supporting mechanism (45), the laser welding head (3) forms a crank-type welding trajectory for the flange plate, the size of which can be adjusted. The turntable (2) comprises a fixed seat (21), a motor (22), a guide (23), a gear (24), a gear ring (25), a rotating ring (26), and an annular guide rail (27). A fixed seat (21) is provided on the lower side of the mechanical arm (1). The upper end of the fixed seat (21) is used for sleeve-connecting a flange. The bottom of the fixed seat (21) is fixedly mounted with a motor (22). The output end of the motor (22) is fixedly connected with a gear (24). The outer side of the gear (24) is A gear ring (25) is meshed with the gear ring (25), a rotating ring (26) is fixedly connected to the upper side of the gear ring (25), two groups of guide members (23) are fixedly connected to the lower side of the rotating ring (26) and inside the gear ring (25), an annular guide rail (27) is provided inside the guide member (23), the guide member (23) rolls on the inside of the annular guide rail (27), the annular guide rail (27) is fixedly connected to the fixed seat (21), and the mechanical arm (1) is fixedly connected to the rotating ring (26); The adjustment mechanism (5) comprises an adjustment component (51) and a trigger component (52); the adjustment component (51) is fixedly connected to the outside of the muzzle of the laser welding head (3); the adjustment component (51) is fixedly connected to evenly distributed trigger components (52); the trigger components (52) correspond to the telescopic components (42); The adjustment component (51) comprises a second motor (511), a second gear (512), a fixing ring (513), a second gear ring (514), a mounting ring (515), a third gear (516), a limiting block (517), and a rack (518); a cover plate is fixedly connected to the outer side of the muzzle of the laser welding head (3); the upper side of the cover plate is fixedly connected to the second motor (511); the output end of the second motor (511) is fixedly connected to the second gear (512); the lower part of the outer side of the second gear (512) is meshed with the second gear ring (514); the upper side of the second gear ring (514) is provided with a mounting ring (515); the lower side of the mounting ring (515) is fixedly connected to the fixing ring (513); and the second gear ring (514) rotates between the mounting ring (515) and the inner side of the fixing ring (513).

2. A flange welding device according to claim 1, characterized in that: The telescopic assembly (42) comprises a cylinder body (421), a base (422), a piston block (423), a piston rod (424), and a connecting block (425); the base (422) is fixedly connected to the lower side of the fixed platform (44); the inner side of the base (422) is rotatably connected to the cylinder body (421); the inner side of the cylinder body (421) is slidably connected to the piston block (423); the inner side of the piston block (423) is fixedly connected to the piston rod (424); the piston rod (424) passes through the side wall of the cylinder body (421) and extends to the outside of the cylinder body (421); one end of the piston rod (424) away from the piston block (423) is rotatably connected to the connecting block (425); and the connecting block (425) is fixedly connected to the motion platform (41).

3. A flange welding device according to claim 2, characterized in that: The regulating mechanism (43) comprises a fixed cylinder (431), a coil (432), a magnetic block (433), an air outlet nozzle (434), a moving valve stem (435), an air intake pipe (436), and an air intake nozzle (437); the outer side of the cylinder body (421) is fixedly connected to the fixed cylinder (431) via a mounting plate; the inner side of the fixed cylinder (431) is fixedly connected to the coil (432); the inner side of the fixed cylinder (431) is slidably connected to the moving valve stem (435); one end of the moving valve stem (435) close to the coil (432) is fixedly connected to the magnetic block (433); the moving valve stem (435) ) are fixedly connected to the outside of the fixed cylinder (431), the outside of the fixed cylinder (431) is connected to an air inlet pipe (436) and two air outlet nozzles (434), the air inlet pipe (436) corresponds to the conical block in the middle, the air outlet nozzles (434) correspond to the conical blocks on the outside, the outside of the fixed cylinder (431) and on the opposite sides of the air inlet pipe (436) and the air outlet nozzles (434) are connected to two air inlet nozzles (437), and the inside of the fixed cylinder (431) is provided with a plurality of annular cavities, and the plurality of annular cavities respectively correspond to the air outlet nozzles (434), the air inlet nozzles (437), and the air inlet pipe (436).

4. A flange welding device according to claim 1, characterized in that: The support mechanism (45) comprises a connecting seat (451), a rotating block (452), a fixed block (453), a mounting tube (454), and a moving rod (455); the upper side of the fixed platform (44) is fixedly connected to a uniformly distributed connecting frame; the annular block and the connecting frame are fixedly connected to the connecting seat (451) on opposite sides; the other end of the connecting seat (451) is rotatably connected to the rotating block (452); the outer side of the rotating block (452) is rotatably connected to the fixed block (453); one side of the fixed block (453) away from the connecting seat (451) is fixedly connected to the mounting tube (454); the other side of the fixed block (453) away from the connecting seat (451) is fixedly connected to the moving rod (455); and the moving rod (455) slides on the inner side of the mounting tube (454).

5. A flange welding device according to claim 3, characterized in that: The inner side of the gear ring 2 (514) is meshed with a uniformly distributed gear 3 (516); the upper side of the gear 3 (516) is rotatably connected to the cover plate; the upper outer side of the gear 3 (516) is meshed with a rack (518); the upper side of the mounting ring (515) is fixedly connected with a limiting block (517); the mounting ring (515) and the limiting block (517) are provided with a slide groove corresponding to the rack (518), and the rack (518) slides in the slide groove.

6. A flange welding device according to claim 5, characterized in that: The trigger assembly (52) comprises a connecting tube (521), a spring (522), a contact point 1 (523), a contact point 2 (524), a movable rod (525), and a force block (526); the upper side of the rack (518) is fixedly connected to the connecting tube (521); the inner side of the connecting tube (521) is fixedly connected to the contact point 1 (523); the inner side of the connecting tube (521) is slidably connected to the contact point 2 (524); the side of the contact point 2 (524) away from the contact point 1 (523) is fixedly connected to the movable rod (525); the side of the movable rod (525) away from the contact point 2 (524) is fixedly connected to the force block (526); and the outer side of the movable rod (525) is sleeved with the spring (522).

7. A flange welding device according to claim 6, characterized in that: The first contact (523), the second contact (524) and the coil (432) are electrically connected, and the two air outlet nozzles (434) are respectively connected to the air ports at both ends of the cylinder body (421) through hoses.

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