Automatic welding forming method for fireproof door frame

Abstract

The invention discloses an automatic welding forming method for a fireproof door frame, and relates to the field of fireproof door frame production, and the automatic welding forming method comprises the following steps: step 1, frame splicing: two ends of a frame plate are fed into a welding box through moving through grooves, and after the lower surface is in contact with a lap plate, the end part of the frame plate is positioned between a right-angle outer coaming and a right-angle inner coaming; 2, clamping and fixing are conducted, specifically, a bidirectional motor in a clamping assembly works, so that a connected threaded rod rotates, a worm connected to the other end rotates under the action of a magnetic coupler, and a worm gear is driven to drive a shaft rod to rotate; and thirdly, cleaning and welding are conducted, after the coaming moves upwards, the top ends of the two semicircular shells are closed under pushing of two first electric telescopic cylinders to form a ring shape, and the ends, abutting against each other, of the two frame plates are sleeved with the semicircular shells, after the ends between the frames are positioned, automatic welding can be conducted at the original position without conveying, and the welding efficiency is improved. And deviation in the conveying process is avoided, and the consistency and stability of the welding quality are ensured.

Description

Technical Field

[0001] The invention mainly relates to the technical field of fireproof door frame production, and specifically to an automatic welding forming method for a fireproof door frame. Background Art

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. They are fireproof partitions with a certain degree of fire resistance, installed between fire compartments, evacuation stairwells, vertical shafts, etc. In addition to the functions of ordinary doors, fire doors can also prevent the spread of fire and smoke. They can prevent the spread of fire within a certain period of time and ensure the evacuation of personnel. Steel fire doors are made of steel materials to make door frames, door leaf frames and door leaf panels, so the door frames need to be welded.

[0003] An automatic welding and forming device for a fire door frame described in the prior art includes: a conveyor belt, which is arranged in parallel and spaced relation at front and rear, and is used to output welded fire door frames; a gantry, which is arranged across the front and rear conveyor belts, and has an automatic welding mechanism suspended on its top; a feeding mechanism, which is arranged in a right-angle structure and is fixed by diagonally arranged columns to form a square feeding system, and is used to input frame panels of fire door frames.

[0004] Although the above technology can guide and position the frame plate and automatically weld it to ensure the welding accuracy and efficiency of the fire door frame, during welding, the frame needs to be transported to the automatic welding mechanism. The workpiece may not be firmly fixed or the clamping position is inaccurate, resulting in deviation during the transportation process, affecting the welding quality and efficiency. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a method for automatic welding and forming a fire door frame to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for automatically welding and forming a fire door frame comprises the following steps: Step 1: Frame splicing: both ends of the frame plate are sent into the welding box through the moving slots. After the lower surface contacts the lap plate, the end is located between the right-angle outer plate and the right-angle inner plate. The other three frame plates are placed in the same way to complete the abutment between the ends. Step 2: Clamping and fixing. The bidirectional motor in the clamping assembly works to rotate the connected threaded rod, and the worm connected at the other end rotates under the action of the magnetic coupler, driving the worm gear to drive the shaft to rotate. The shaft drives the movable clamping plate to move through the external thread driving moving block. The movable clamping plate cooperates with the fixed clamping plate to clamp and fix the frame plate. At this time, the lifting block that follows the threaded rod to descend pulls the right-angle outer plate and the right-angle inner plate through the pull rope in the upward moving assembly, leaving space for the closing of the automatic welding assembly. Step 3: cleaning and welding. After the enclosure is moved up, the top ends of the two semicircular ring shells are closed under the push of the two first electric telescopic cylinders to form a ring, and the abutting ends of the two frame plates are placed therein. Then, the arc plate is controlled to move along the inner walls of the two semicircular ring shells under the action of the driving motor. At this time, the nozzle sprays industrial acetone cleaning liquid onto the abutting surface of the frame plate, and the pneumatic telescopic cylinder pushes the wiping sponge to wipe the abutting surface of the frame plate. After cleaning, the abutting contacts are welded by a welding gun, and finally the welded frame is taken out along the movable through slot by a crane.

[0007] Specifically, the technical solution is that four welding boxes are provided, the bottom ends of the four welding boxes are fixed to the four corners of the upper surface of the bottom plate by bolts, the top and two adjacent surfaces of each welding box are provided with a movable through groove, the two sides of each welding box are located at the bottom of the movable through groove and are welded with lap plates, and both ends of each lap plate are fixed with a protective box, the inner wall of the right-angle outer plate is in contact with the outer wall of the frame plate, and the outer wall of the right-angle inner plate is in contact with the inner wall of the frame plate; The automatic welding assembly is arranged at an angle of 45° at the inner center of the welding box, and each of the lap plates is provided with a clamping assembly. The right-angle outer plate and the right-angle inner plate are connected to the clamping assembly via an upward moving assembly, and the right-angle outer plate and the right-angle inner plate are connected to the upward moving assembly via two groups of clamping assemblies. The inner wall of the welding box is provided with an abutment assembly for adjusting the position of the right-angle outer plate according to the width of the frame plate.

[0008] Specifically, the present technical solution is that each of the clamping components includes a fixed clamping plate and a movable clamping plate arranged on the upper surface of the lap plate, the bottom end of the fixed clamping plate is welded to the lap plate, the lap plate is provided with a movable groove at the movable clamping plate, a movable block is provided in the movable groove, the top of the movable block is fixedly connected to the bottom end of the movable clamping plate, a shaft rod is passed through the movable block, the two ends of the shaft rod respectively pass through two protective boxes and are rotatably connected to the inner walls thereof, and the outer wall of the shaft rod is provided with an external thread at the movable groove.

[0009] The technical solution is specific: a bidirectional motor is installed on the upper surface of a protective box by bolts, and a worm wheel and a vertical bevel gear are respectively provided in the two protective boxes. A vertical worm is meshed on one side of the worm wheel, and the bottom output end of the bidirectional motor passes through the box body and is connected to the top of the worm by a magnetic coupler. A transverse bevel gear is meshed above the tooth surface of the vertical bevel gear. Threaded rods are provided at the top output end of the bidirectional motor and the center of the transverse bevel gear, and lifting blocks are sleeved on the two threaded rods. Inverted U-shaped limiting baffles are installed on the top of the two protective boxes by bolts, and the outer walls on both sides of the two lifting blocks are in contact with the inner wall of the limiting baffle.

[0010] Specifically, the worm gear and the vertical bevel gear are fixedly sleeved on the outer walls at both ends of the shaft rod, and the top ends of the two threaded rods are rotatably connected to the inner top wall of the limiting baffle.

[0011] Specifically, the technical solution of the present invention is that each of the upward moving components includes two pull ropes and a bracket plate, the two pull ropes are respectively fixedly connected to one end of the upper surface of the right-angle outer plate and the right-angle inner plate, the two bracket plates both pass through the top of the side wall of the welding box and are fixedly connected, guide rods are fixedly installed at the overhead ends of the two bracket plates, the two pull ropes respectively extend along the bracket plates and through the two guide rods to the outside of the welding box, and the other ends of the two pull ropes respectively pass through the top of the limiting baffle and are fixedly connected to the lifting block.

[0012] The technical solution is specific that both ends of the lower surfaces of the right-angle outer plate and the right-angle inner plate are fixedly connected with telescopic rods, the bottom ends of the two telescopic rods of the right-angle inner plate are fixedly connected to the inner bottom wall of the welding box, and the bottom ends of the two telescopic rods of the right-angle outer plate are movably connected to the inner bottom wall of the welding box through ball bearings.

[0013] Specifically, the abutment assembly includes two fixed blocks, and the two fixed blocks are installed on the two inner walls of the welding box by bolts. The second electric telescopic cylinder is installed on the two fixed blocks by bolts, and the telescopic ends of the two second electric telescopic cylinders are fixed with mounting plates, and the two telescopic rods of the right-angle outer plate are sleeved with push plates, and the two push plates are fixedly connected to the mounting plate.

[0014] The technical solution is specific, the automatic welding assembly includes two matching semicircular ring shells, a base is installed below the two semicircular ring shells through a movable frame, the base is fixedly connected to the inner bottom wall of the welding box by bolts, the outer walls on both sides of the base are connected to the outer walls of the two semicircular ring shells through a first electric telescopic cylinder, the inner circles of the two semicircular ring shells are fixed with tracks, an arc plate is installed on the track, and the arc plate is slidably connected to the track through a driving motor.

[0015] Specifically, the side of the arc plate away from the track is equipped with a nozzle, a welding gun and a wiping sponge in sequence, the nozzle is connected to the clean water tank through a hose, and the welding gun and the wiping sponge are fixedly connected to the arc plate through a pneumatic telescopic cylinder.

[0016] In summary, the present invention mainly has the following beneficial effects: after positioning the ends between the frames, the present invention can automatically weld at the original position without the need for transportation, thereby avoiding deviation during transportation and ensuring the consistency and stability of welding quality; And before welding, the surface of the welding part can be cleaned of oil and dirt, which can further improve the quality of welding and reduce the phenomenon of defects such as pores in welding caused by dirt; First, the staff uses the lifting equipment to send both ends of the frame plate into the welding box through the moving slot. After the lower surface contacts the lap plate, its end is located between the right-angle outer plate and the right-angle inner plate. The other three frame plates are placed in the same way. The second electric telescopic cylinder works, and the right-angle outer plate is pushed to move through the push plate, so that the ends of the four frame plates can abut. Then the bidirectional motor works, and the threaded rod connected to the top output end rotates, while the bottom end drives the worm to rotate through the magnetic coupler, driving the worm wheel to drive the shaft to rotate, and the shaft drives the movable clamping plate to move through the external thread drive block, and the movable clamping plate cooperates with the fixed clamping plate to clamp and fix the frame plate; At this time, the lifting block that follows the threaded rod to descend pulls the right-angle outer plate and the right-angle inner plate through the pull rope, and the upward moving right-angle outer plate and the right-angle inner plate stretch the telescopic rod, and then the two semicircular ring shells are closed at the top to form a ring under the push of the two first electric telescopic cylinders, and the abutting ends of the two frame plates are put in it, and then the arc plate is controlled to move along the inner wall of the two semicircular ring shells under the action of the driving motor. At this time, the nozzle sprays industrial acetone cleaning liquid onto the abutting surface of the frame plate, and the pneumatic telescopic cylinder pushes the wiping sponge to wipe the abutting surface of the frame plate. After cleaning, the abutting contact is welded by the welding gun, and finally the welded frame is taken out along the moving through groove by the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a diagram of the method steps of the present invention; Figure 2 It is a schematic diagram of the device of the present invention; Figure 3 It is a schematic diagram of a welding box of the present invention; Figure 4 For the present invention Figure 2 Top view; Figure 5 It is a schematic diagram of the internal structure of the welding box of the present invention; Figure 6For the present invention Figure 5 Top view; Figure 7 A side view of a welding box of the present invention; Figure 8 It is a structural diagram of the clamping assembly and the upper assembly of the present invention.

[0018] Description of the drawings: 1. Bottom plate; 101. Welding box; 1011. Moving slot; 102. Frame plate; 103. Overlap plate; 1031. Protective box; 2. Right-angle outer plate; 201. Right-angle inner plate; 3. Automatic welding assembly; 301. Semicircular ring shell; 3011. Track; 302. Arc plate; 303. Welding gun; 304. Nozzle; 305. Pneumatic telescopic cylinder; 306. Base; 3061. First electric telescopic cylinder; 307. Drive motor; 308. Wiping sponge; 4. Clamping assembly; 401. Fixed clamping plate; 402. Movable splint; 4021, moving block; 403, moving slot; 404, shaft; 405, worm wheel; 406, worm; 407, bidirectional motor; 408, vertical bevel gear; 409, transverse bevel gear; 410, threaded rod; 411, lifting block; 412, limiting baffle; 413, magnetic coupler; 5, upward moving assembly; 501, pull rope; 502, bracket plate; 5021, guide rod; 503, telescopic rod; 6, abutment assembly; 601, fixed block; 602, second electric telescopic cylinder; 603, mounting plate; 604, push plate. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] The following describes an embodiment of the present invention based on its overall structure. Example

[0021] See also Figure 1-8 As shown, a method for automatically welding and forming a fire door frame includes the following steps: Step 1: Frame splicing: both ends of the frame plate 102 are sent into the welding box 101 through the movable slot 1011. After the lower surface contacts the lap plate 103, its end is located between the right-angle outer plate 2 and the right-angle inner plate 201. The other three frame plates 102 are placed in the same way to complete the abutment between the ends. Step 2: clamping and fixing. The bidirectional motor 407 in the clamping assembly 4 works to rotate the connected threaded rod 410, and the worm 406 connected to the other end rotates under the action of the magnetic coupler 413, driving the worm gear 405 to drive the shaft 404 to rotate. The shaft 404 drives the movable clamping plate 402 to move through the external thread driving moving block 4021. The movable clamping plate 402 cooperates with the fixed clamping plate 401 to clamp and fix the frame plate 102. At this time, the lifting block 411 that follows the threaded rod 410 to descend pulls the right-angle outer plate 2 and the right-angle inner plate 201 through the pull rope 501 in the upward moving assembly 5, leaving space for the closing of the automatic welding assembly 3. Step 3: Cleaning and welding. After the enclosure is moved up, the top ends of the two semicircular ring shells 301 are closed to form a ring under the push of the two first electric telescopic cylinders 3061, and the abutting ends of the two frame plates 102 are inserted therein. Then, the arc plate 302 is controlled to move along the inner wall of the two semicircular ring shells 301 under the action of the driving motor 307. At this time, the nozzle 304 sprays industrial acetone cleaning liquid to the abutting surface of the frame plate 102, and the pneumatic telescopic cylinder 305 pushes the wiping sponge 308 to wipe the abutting surface of the frame plate 102. After cleaning, the abutting contact is welded by the welding gun 303 , and finally the welded frame is taken out along the movable through slot 1011 by a crane.

[0022] The electrical components in this application are all controlled by an external controller, and the output end of the drive motor 307 in the automatic welding assembly 3 is located in the arc plate 302 and a spur gear is installed inside, and an inner track tooth is provided on the track 3011. The arc plate 302 can be driven to move along the track 3011 by the rotation of the spur gear along the inner track tooth. This structure is relatively common and is described in the text and figures.

[0023] See also Figure 2-6 As shown, four welding boxes 101 are provided, and the bottom ends of the four welding boxes 101 are fixed to the four corners of the upper surface of the bottom plate 1 by bolts. A movable through slot 1011 is provided on the top and two adjacent surfaces of each welding box 101. Both sides of each welding box 101 are located at the bottom of the movable through slot 1011 and are welded with lap plates 103. Both ends of each lap plate 103 are fixed with protective boxes 1031. The inner wall of the right-angle outer plate 2 is in contact with the outer wall of the frame plate 102, and the outer wall of the right-angle inner plate 201 is in contact with the inner wall of the frame plate 102. The automatic welding assembly 3 is arranged at 45 degrees at the inner center of the welding box 101, each lap plate 103 is provided with a clamping assembly 4, the right-angle outer plate 2 and the right-angle inner plate 201 are connected to the clamping assembly 4 through an upward moving assembly 5, and the right-angle outer plate 2 and the right-angle inner plate 201 are connected to the upward moving assembly 5 through two groups of clamping assemblies 4, and the inner wall of the welding box 101 is provided with an abutment assembly 6 for adjusting the position of the right-angle outer plate 2 according to the width of the frame plate 102; The abutment assembly 6 includes two fixing blocks 601, which are mounted on two inner walls of the welding box 101 by bolts, and second electric telescopic cylinders 602 are mounted on the two fixing blocks 601 by bolts, and mounting plates 603 are fixed to the telescopic ends of the two second electric telescopic cylinders 602, and push plates 604 are sleeved on the two telescopic rods 503 of the right-angle outer plate 2, and the two push plates 604 are fixedly connected to the mounting plates 603; The automatic welding assembly 3 includes two matching semicircular ring shells 301, and a base 306 is installed below the two semicircular ring shells 301 through a movable frame. The base 306 is fixedly connected to the inner bottom wall of the welding box 101 by bolts. The outer walls on both sides of the base 306 are connected to the outer walls of the two semicircular ring shells 301 through a first electric telescopic cylinder 3061. The inner circles of the two semicircular ring shells 301 are fixed with a track 3011, and an arc plate 302 is installed on the track 3011. The arc plate 302 is slidably connected to the track 3011 through a driving motor 307. A nozzle 304, a welding gun 303 and a wiping sponge 308 are installed on the side of the arc plate 302 away from the track 3011 in sequence. The nozzle 304 is connected to the clean water tank through a hose, and the welding gun 303 and the wiping sponge 308 are fixedly connected to the arc plate 302 through a pneumatic telescopic cylinder 305.

[0024] When welding the frame of the fire door, the staff first puts the frame plate 102 horizontally between the two welding boxes 101 through the lifting equipment, so that both ends are sent into the welding box 101 through the movable slot 1011. After the lower surface contacts the lap plate 103, its end will be located between the right-angle outer plate 2 and the right-angle inner plate 201. The other three frame plates 102 are placed in the same way in turn, and then the second electric telescopic cylinder 602 of the abutment component 6 works, and its telescopic end pushes the mounting plate 603 and the push plate 604 to move, so that the push plate 604 pushes the telescopic rod 503 that is penetrated, and then pushes the right-angle outer plate 2 to move, so that the distance between the right-angle outer plate 2 and the right-angle inner plate 201 is changed, so that the outer walls on both sides of the frame plate 102 are in contact with the wall of the right-angle outer plate 2 and the right-angle inner plate 201, and the abutment between the ends of the four frame plates 102 is completed; Then the clamping assembly 4 works to clamp the frame plate 102 and pull up the right-angle outer plate 2 and the right-angle inner plate 201 through the upward moving assembly 5. Then, the two semicircular ring shells 301 of the automatic welding assembly 3 are closed at the top to form a ring under the push of the two first electric telescopic cylinders 3061, and the abutting ends of the two frame plates 102 are inserted into it. Then, the driving motor 307 works to control the arc plate 302 to move along the tracks 3011 of the two semicircular ring shells 301. At this time, the pump body in the cleaning water tank works to pump industrial acetone cleaning liquid from The nozzle 304 sprays toward the surface of the weld of the frame plate 102, and the pneumatic telescopic cylinder 305 of the wiping sponge 308 works, so that the wiping sponge 308 contacts the surface of the weld, and cooperates with the movement of the arc plate 302 to clean the surface of the weld. After the spraying is completed, the wiping sponge 308 is stopped and reset, and the pneumatic telescopic cylinder 305 of the welding gun 303 works to push the welding gun 303 toward the weld, and cooperates with the movement of the arc plate 302 to perform welding. Finally, the welded fire door frame is moved up and taken out along the moving through slot 1011 by a crane; Therefore, after positioning the ends between the frames, the present application can perform automatic welding in the original position without the need for transportation, thus avoiding deviation during transportation and ensuring the consistency and stability of welding quality. In addition, before welding, the surface of the welding part can be cleaned of oil stains, further improving the quality of welding and reducing the phenomenon of defects such as pores in welding caused by dirt.

[0025] See also Figure 5-8 As shown, each clamping assembly 4 includes a fixed clamping plate 401 and a movable clamping plate 402 arranged on the upper surface of the lap plate 103, the bottom end of the fixed clamping plate 401 is welded to the lap plate 103, and a moving groove 403 is opened on the lap plate 103 at the movable clamping plate 402, and a moving block 4021 is arranged in the moving groove 403, and the top of the moving block 4021 is fixedly connected to the bottom end of the movable clamping plate 402, and a shaft rod 404 is passed through the moving block 4021, and the two ends of the shaft rod 404 respectively pass through two protective boxes 1031 and are rotatably connected to the inner wall thereof, and the outer wall of the shaft rod 404 is provided with an external thread at the moving groove 403; A bidirectional motor 407 is installed on the upper surface of a protection box 1031 by bolts. A worm wheel 405 and a vertical bevel gear 408 are respectively provided in the two protection boxes 1031. A vertical worm 406 is meshed on one side of the worm wheel 405. The bottom output end of the bidirectional motor 407 passes through the box body and is connected to the top of the worm 406 through a magnetic coupler 413. A transverse bevel gear 409 is meshed above the tooth surface of the vertical bevel gear 408. The top output end of the bidirectional motor 407 and the transverse bevel gear 409 are meshed. A threaded rod 410 is provided at the center of the bevel gear 409, and a lifting block 411 is sleeved on the two threaded rods 410. An inverted U-shaped limiting baffle 412 is installed on the top of the two protection boxes 1031 by bolts. The outer walls of both sides of the two lifting blocks 411 are in contact with the inner wall of the limiting baffle 412. The worm gear 405 and the vertical bevel gear 408 are fixedly sleeved on the outer walls of both ends of the shaft 404, and the top ends of the two threaded rods 410 are rotatably connected to the inner top wall of the limiting baffle 412. Each upward moving component 5 includes two pull ropes 501 and a bracket plate 502, the two pull ropes 501 are fixedly connected to one end of the upper surface of the right-angle outer plate 2 and the right-angle inner plate 201 respectively, the two bracket plates 502 both penetrate the top of the side wall of the welding box 101 and are fixedly connected, the end of the two bracket plates 502 are fixedly installed with guide rods 5021, the two pull ropes 501 extend to the outside of the welding box 101 along the bracket plates 502 and through the two guide rods 5021 respectively, the other ends of the two pull ropes 501 respectively penetrate the top of the limiting baffle 412 and are fixedly connected to the lifting block 411, the two ends of the lower surface of the right-angle outer plate 2 and the right-angle inner plate 201 are fixedly connected with telescopic rods 503, the bottom ends of the two telescopic rods 503 of the right-angle inner plate 201 are fixedly connected to the inner bottom wall of the welding box 101, and the bottom ends of the two telescopic rods 503 of the right-angle outer plate 2 are movably connected to the inner bottom wall of the welding box 101 through balls.

[0026] When the bidirectional motor 407 is working, the output end at the top drives the connected threaded rod 410 to rotate, and the output end at the bottom drives the worm 406 to rotate through the magnetic coupler 413, and the worm 406 drives the meshing worm wheel 405 to rotate, and the worm wheel 405 drives the inserted shaft 404 to rotate. At this time, the moving block 4021 drives the movable splint 402 to move along the moving groove 403 under the rotation of the external thread, and the movable splint 402 cooperates with the fixed splint 401 to clamp and fix the frame plate 102, and self-locking can be achieved through the worm wheel 405 and the worm 406, and the shaft 404 will also bring The movable vertical bevel gear 408 rotates, and the vertical bevel gear 408 drives the meshing transverse bevel gear 409 to rotate, and the transverse bevel gear 409 drives the threaded rod 410 to rotate. At this time, when the movable clamping plate 402 has not moved into place, the two threaded rods 410 can rotate at the same time. During the rotation process, the lifting block 411 moves downward by limiting the baffle 412. During the downward movement, the pull rope 501 is pulled, and the pull rope 501 moves along the guide rod 5021 and pulls the right-angle outer plate 2 and the right-angle inner plate 201 upward. The moving right-angle outer plate 2 and the right-angle inner plate 201 stretch the telescopic rod 503; When the movable splint 402 moves into position, it will no longer move due to the restriction. Due to the action of the magnetic coupler 413, it will not affect the operation of the bidirectional motor 407. The threaded rod 410 located at the transverse bevel gear 409 of the two threaded rods 410 stops rotating. At this time, the threaded rod 410 connected to the bidirectional motor 407 continues to rotate, and the connected right-angle outer plate 2 and the right-angle inner plate 201 continue to be pulled through the downward lifting block 411, thereby facilitating the subsequent automatic welding assembly 3 to perform welding processing.

[0027] The working principle of the present invention is: When welding the frame of the fire door, the staff first puts the frame plate 102 horizontally between the two welding boxes 101 through the lifting equipment, so that both ends are sent into the welding box 101 through the movable slot 1011. After the lower surface contacts the lap plate 103, its end will be located between the right-angle outer plate 2 and the right-angle inner plate 201. The other three frame plates 102 are placed in the same way in turn, and then the second electric telescopic cylinder 602 of the abutment component 6 works, and its telescopic end pushes the mounting plate 603 and the push plate 604 to move, so that the push plate 604 pushes the telescopic rod 503 that is penetrated, and then pushes the right-angle outer plate 2 to move, so that the distance between the right-angle outer plate 2 and the right-angle inner plate 201 is changed, so that the outer walls on both sides of the frame plate 102 are in contact with the wall of the right-angle outer plate 2 and the right-angle inner plate 201, and the abutment between the ends of the four frame plates 102 is completed; Then the bidirectional motor 407 works, the top output end drives the connected threaded rod 410 to rotate, the bottom output end drives the worm 406 to rotate through the magnetic coupler 413, the worm 406 drives the meshing worm wheel 405 to rotate, the worm wheel 405 drives the shaft 404 to rotate, at this time, the moving block 4021 drives the movable splint 402 to move along the moving groove 403 under the rotation of the external thread, the movable splint 402 cooperates with the fixed splint 401 to clamp and fix the frame plate 102, and the worm wheel 405 and the worm 406 can achieve self-locking, and the shaft 404 will also rotate when rotating. The vertical bevel gear 408 is driven to rotate, and the vertical bevel gear 408 drives the meshing transverse bevel gear 409 to rotate, and the transverse bevel gear 409 drives the threaded rod 410 to rotate. At this time, when the movable clamping plate 402 has not moved into place, the two threaded rods 410 can rotate at the same time. During the rotation process, the lifting block 411 is moved downward by limiting the baffle 412. During the downward movement, the pull rope 501 is pulled, and the pull rope 501 moves along the guide rod 5021 and pulls the right-angle outer plate 2 and the right-angle inner plate 201 upward. The moving right-angle outer plate 2 and the right-angle inner plate 201 stretch the telescopic rod 503; When the movable splint 402 moves into position, it will no longer move due to the restriction. Due to the action of the magnetic coupler 413, it will not affect the operation of the bidirectional motor 407. The threaded rod 410 located at the transverse bevel gear 409 of the two threaded rods 410 stops rotating. At this time, the threaded rod 410 connected to the bidirectional motor 407 continues to rotate, and the connected right-angle outer plate 2 and the right-angle inner plate 201 are continued to be pulled through the downward lifting block 411. Then, the two semicircular ring shells 301 of the automatic welding assembly 3 are closed at the top to form a ring under the push of the two first electric telescopic cylinders 3061, and the ends of the two frame plates 102 abutting against each other are inserted into it, and then the arc is controlled by the driving motor 307. The plate 302 moves along the track 3011 of the two semicircular ring shells 301. At this time, the pump body in the cleaning water tank works to spray industrial acetone cleaning liquid from the nozzle 304 to the welding surface of the frame plate 102, and the pneumatic telescopic cylinder 305 of the wiping sponge 308 works to make the wiping sponge 308 contact the welding surface, cooperate with the movement of the arc plate 302, and clean the welding surface. After completion, stop spraying and reset the wiping sponge 308. The pneumatic telescopic cylinder 305 of the welding gun 303 works to push the welding gun 303 to the welding, and cooperate with the movement of the arc plate 302 to perform welding. Finally, the welded fire door frame is moved up and taken out along the moving groove 1011 by a crane.

[0028] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A method for automatic welding and forming a fire door frame, characterized in that: The following steps are involved: Step 1: Frame splicing: both ends of the frame plate (102) are sent into the welding box (101) through the movable slot (1011). After the lower surface contacts the lap plate (103), the end portion is located between the right-angle outer plate (2) and the right-angle inner plate (201). The other three frame plates (102) are placed in the same manner in turn to complete the abutment between the ends. Step 2: clamping and fixing. The bidirectional motor (407) in the clamping assembly (4) works to rotate the connected threaded rod (410), and the worm (406) connected at the other end rotates under the action of the magnetic coupler (413), driving the worm wheel (405) to drive the shaft (404) to rotate. The shaft (404) drives the movable clamp (402) to move through the external thread driving moving block (4021). The movable clamp (402) cooperates with the fixed clamp (401) to clamp and fix the frame plate (102). At this time, the lifting block (411) that follows the threaded rod (410) to descend pulls the right-angle outer plate (2) and the right-angle inner plate (201) through the pull rope (501) in the upward moving assembly (5), leaving space for the closing of the automatic welding assembly (3); Step 3, cleaning and welding, after the enclosure is moved up, the top ends of the two semicircular ring shells (301) are closed to form a ring under the push of the two first electric telescopic cylinders (3061), and the abutting ends of the two frame plates (102) are inserted therein, and then the arc plate (302) is controlled to move along the inner wall of the two semicircular ring shells (301) under the action of the driving motor (307), and at this time, the nozzle (304) sprays industrial acetone cleaning liquid onto the abutting surface of the frame plate (102), and the pneumatic telescopic cylinder (305) pushes the wiping sponge (308) to wipe the abutting surface of the frame plate (102); After cleaning is completed, the abutting contact is welded by a welding gun (303), and finally the welded frame is taken out along the movable through slot (1011) by a crane.

2. The automatic welding method for a fire door frame according to claim 1, characterized in that: Four welding boxes (101) are provided, and the bottom ends of the four welding boxes (101) are fixed to the four corners of the upper surface of the bottom plate (1) by bolts. A movable through slot (1011) is provided on the top and two adjacent surfaces of each welding box (101). Both sides of each welding box (101) are welded with lap plates (103) at the bottom of the movable through slot (1011). Both ends of each lap plate (103) are fixed with protective boxes (1031). The inner wall of the right-angle outer plate (2) is in contact with the outer wall of the frame plate (102), and the outer wall of the right-angle inner plate (201) is in contact with the inner wall of the frame plate (102). The automatic welding assembly (3) is arranged at an angle of 45 degrees at the inner center of the welding box (101); each of the overlapping plates (103) is provided with a clamping assembly (4); the right-angled outer plate (2) and the right-angled inner plate (201) are connected to the clamping assembly (4) via an upward moving assembly (5); the right-angled outer plate (2) and the right-angled inner plate (201) are connected to the upward moving assembly (5) via two groups of clamping assemblies (4); and the inner wall of the welding box (101) is provided with an abutment assembly (6) for adjusting the position of the right-angled outer plate (2) according to the width of the frame plate (102).

3. The automatic welding method for a fire door frame according to claim 2, characterized in that: Each of the clamping assemblies (4) comprises a fixed clamping plate (401) and a movable clamping plate (402) arranged on the upper surface of the lap plate (103); the bottom end of the fixed clamping plate (401) is welded to the lap plate (103); a movable groove (403) is provided on the lap plate (103) at the movable clamping plate (402); a movable block (4021) is provided in the movable groove (403); the top end of the movable block (4021) is fixedly connected to the bottom end of the movable clamping plate (402); a shaft rod (404) is passed through the movable block (4021); two ends of the shaft rod (404) respectively pass through two protective boxes (1031) and are rotatably connected to the inner walls thereof; an outer wall of the shaft rod (404) is provided with an external thread at the movable groove (403).

4. The automatic welding method for a fire door frame according to claim 3, characterized in that: A bidirectional motor (407) is installed on the upper surface of one of the protection boxes (1031) by means of bolts. A worm wheel (405) and a vertical bevel gear (408) are respectively provided in the two protection boxes (1031). A vertical worm (406) is meshed on one side of the worm wheel (405). The bottom output end of the bidirectional motor (407) passes through the box body and is connected to the top of the worm (406) through a magnetic coupler (413). The tooth surface of the vertical bevel gear (408) is The two protective boxes (1031) are meshedly connected with a transverse bevel gear (409), a threaded rod (410) is provided at the top output end of the bidirectional motor (407) and the center of the transverse bevel gear (409), a lifting block (411) is sleeved on the two threaded rods (410), an inverted U-shaped limiting baffle (412) is installed on the top of the two protective boxes (1031) by bolts, and the outer walls on both sides of the two lifting blocks (411) are in contact with the inner wall of the limiting baffle (412).

5. The automatic welding method for a fire door frame according to claim 4, characterized in that: The worm gear (405) and the vertical bevel gear (408) are both fixedly sleeved on the outer walls at both ends of the shaft rod (404), and the top ends of the two threaded rods (410) are both rotatably connected to the inner top wall of the limiting baffle (412).

6. The automatic welding method for a fire door frame according to claim 4, characterized in that: Each upward moving assembly (5) comprises two pull ropes (501) and a bracket plate (502), the two pull ropes (501) being fixedly connected to one end of the upper surface of the right-angle outer plate (2) and the right-angle inner plate (201), respectively, the two bracket plates (502) both pass through the top of the side wall of the welding box (101) and are fixedly connected, the ends of the two bracket plates (502) are fixedly installed with guide rods (5021) at the overhead positions, the two pull ropes (501) respectively extend along the bracket plates (502) and through the two guide rods (5021) to the outside of the welding box (101), and the other ends of the two pull ropes (501) respectively pass through the top of the limiting baffle (412) and are fixedly connected to the lifting block (411).

7. The automatic welding method for a fire door frame according to claim 6, characterized in that: Both ends of the lower surfaces of the right-angled outer plate (2) and the right-angled inner plate (201) are fixedly connected with telescopic rods (503); the bottom ends of the two telescopic rods (503) of the right-angled inner plate (201) are fixedly connected to the inner bottom wall of the welding box (101); and the bottom ends of the two telescopic rods (503) of the right-angled outer plate (2) are movably connected to the inner bottom wall of the welding box (101) via ball bearings.

8. The automatic welding method for a fire door frame according to claim 6, characterized in that: The abutment assembly (6) comprises two fixing blocks (601), the two fixing blocks (601) being mounted on two inner walls of the welding box (101) by means of bolts, the two fixing blocks (601) being mounted with second electric telescopic cylinders (602) by means of bolts, the telescopic ends of the two second electric telescopic cylinders (602) being fixed with mounting plates (603), the two telescopic rods (503) of the right-angle outer plate (2) being sleeved with push plates (604), the two push plates (604) being fixedly connected to the mounting plates (603).

9. The automatic welding method for a fire door frame according to claim 2, characterized in that: The automatic welding assembly (3) comprises two matching semicircular ring shells (301), a base (306) is installed below the two semicircular ring shells (301) via a movable frame, the base (306) is fixedly connected to the inner bottom wall of the welding box (101) via bolts, the outer walls on both sides of the base (306) are connected to the outer walls of the two semicircular ring shells (301) via a first electric telescopic cylinder (3061), the inner rings of the two semicircular ring shells (301) are fixed with a track (3011), an arc plate (302) is installed on the track (3011), and the arc plate (302) is slidably connected to the track (3011) via a driving motor (307).

10. The automatic welding method for a fire door frame according to claim 9, characterized in that: A nozzle (304), a welding gun (303) and a wiping sponge (308) are sequentially mounted on a side of the arc plate (302) away from the track (3011); the nozzle (304) is connected to a cleaning water tank via a hose; and the welding gun (303) and the wiping sponge (308) are fixedly connected to the arc plate (302) via a pneumatic telescopic cylinder (305).

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