CN219131099U

CN219131099U - Elevator layer door plant strengthening rib butt-joint platform and elevator layer door plant processing lines

Info

Publication number: CN219131099U
Application number: CN202320149670.4U
Authority: CN
Inventors: 张刚
Original assignee: Chongqing Wester Elevator Co ltd
Current assignee: Chongqing Wester Elevator Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-06-06
Anticipated expiration: 2033-02-08

Abstract

The utility model relates to the technical field of elevators, in particular to an elevator landing door plate reinforcing rib butt-welding platform and an elevator landing door plate processing production line, which comprise a conveying table III, a butt-welding machine II positioned at the front end of the conveying table III and a pulley arranged at the upper part of the conveying table III in a sliding manner, wherein a landing door plate front section positioning mechanism, a landing door plate rear section positioning mechanism and a side surface positioning mechanism are arranged at the bottom of the conveying table III; the device also comprises a landing plate feeding platform, a punching platform, a bending platform, a head spot welding platform, a reinforcing rib butt welding platform and a welding platform which are sequentially arranged; the beneficial technical effects of the utility model are as follows: 1. the reinforcing rib positioning mechanism has the characteristic of high positioning precision, and is beneficial to improving the product quality; 2. the whole production process of the production line is finished by automatic equipment, so that a series of operations are greatly saved, the process control accuracy of each link is improved through a set program, the processing precision of the layer door plate is improved, and the labor cost is effectively reduced.

Description

Elevator layer door plant strengthening rib butt-joint platform and elevator layer door plant processing lines

Technical Field

The utility model relates to the technical field of elevators, in particular to an elevator layer door plate reinforcing rib butt-joint platform and an elevator layer door plate processing production line.

Background

The elevator is an electromechanical device which utilizes power to drive a box body running along a rigid guide rail to lift or transport people and goods in parallel, and an elevator landing door is arranged on a floor and is used for closing a hoistway door before the elevator does not reach the floor.

The traditional elevator layer door plate is assembled manually and is realized by manual assembly and welding on different assembly stations respectively, the assembly stations are distributed, the elevator layer door plate is required to be transferred to the next assembly station through manpower or by means of tools when one assembly process is completed, the assembly efficiency is low, the quality of the layer door plate is completely dependent on the experience and technology of workers, the defects of welding omission, false welding, incomplete welding and the like are easy to occur, the reworking and repair rate of the layer door plate are high, the production efficiency of the whole elevator layer door plate production line is influenced, and the labor cost is high.

In the prior art, patent number CN201822253767.1 Chinese patent discloses a steel plate door processing system, in the steel plate door processing system in this patent when using, pass through the conveying subassembly with the steel plate material that needs processing earlier and convey the punching station, punch into the material that is rectangle and four sides upwards turn-up with the material at the punching station, after punching, convey the material on the punching station to the station of bending by conveying subassembly again, bend the material four sides turn-up to the material inside at the station of bending, convey the material after bending to first press riveting station by conveying subassembly again, press rivet the shaping to the punching press of material, press rivet the material after the material rethread conveying subassembly convey to the strengthening rib place welding station, place the material after having placed the material, rethread conveying subassembly places the strengthening rib in the mid portion of material, weld fastening with the material again, steel plate door preparation is accomplished.

However, in this patent, the reinforcing ribs are placed in the middle of the material by the mechanical arm suction cup of the conveying assembly, and due to the deviation of the stacking position of the reinforcing ribs, the position to be welded where the reinforcing ribs are placed on the material by the mechanical arm suction cup also has the deviation, which results in the situations of low welding precision and inconsistent products, and therefore, the technical problem needs to be improved.

Disclosure of Invention

In order to solve the problem that the welding position of the reinforcing rib is deviated in the prior art, the utility model provides the butt-welding platform for the reinforcing rib of the elevator layer door plate, which has the characteristic of high positioning precision and is beneficial to improving the product quality.

In order to achieve the above purpose, the following technical scheme is provided:

the elevator landing door plate reinforcing rib butt-welding platform comprises a conveying table III, a butt-welding machine II positioned at the front end of the conveying table III and a pulley arranged at the upper part of the conveying table III in a sliding manner, wherein a landing door plate front section positioning mechanism, a landing door plate rear section positioning mechanism and a side surface positioning mechanism are arranged at the bottom of the conveying table III; the pulley is provided with a clamping device for clamping two sides of the landing door plate; the upper part of the pulley is provided with a reinforcing rib positioning mechanism, the reinforcing rib positioning mechanism comprises a fixing frame and a lifting frame, the fixing frame and the lifting frame are positioned at the three upper parts of the conveying table, and the fixing frame is connected with the lifting frame through a first lifting device; the two sides of the bottom of the lifting frame are respectively provided with a reinforcing rib positioning clamping plate, and the reinforcing rib positioning clamping plates are respectively connected with the lifting frame through first telescopic devices.

Preferably, a reinforcing rib front section limiting mechanism is further arranged at the front end in the pulley.

Preferably, a first switch bracket is arranged on the fixed frame, the upper end and the lower end of the first switch bracket are respectively provided with a first weighing switch, and a first switch opening plate matched with the first weighing switch is arranged on the movable frame.

Preferably, a weighing switch matched with the reinforcing rib positioning clamping plate is arranged at the bottom of the lifting frame.

Preferably, the bottom of the conveying table III is provided with a lifting roller mechanism, the lifting roller mechanism comprises a second lifting device and a top plate connected with the second lifting device, a roller bracket is arranged on the top plate, and a roller is arranged on the roller bracket.

Preferably, the layer door plate front section positioning mechanism comprises a third lifting device and a limiting plate connected with the third lifting device, and the limiting plate is provided with a first photoelectric switch; the layer door plate rear section positioning mechanism comprises a fourth lifting device fixed below the conveying table III, the fourth lifting device is connected with a mounting bracket, a second telescopic device is arranged on the mounting bracket, and the second telescopic device is connected with a positioning plate; the bottom of the mounting bracket is provided with a second switch bracket, the front end and the rear end of the second switch bracket are respectively provided with a second weighing switch, and the positioning plate is provided with a second switch beating plate matched with the second weighing switch; the side surface positioning mechanism comprises a landing door positioning clamping plate, a third telescopic device and a fourth telescopic device, wherein the landing door positioning clamping plate is positioned at the three bottoms of the conveying table, the fourth telescopic device is arranged on a connecting plate at the end part of the third telescopic device, and the landing door positioning clamping plate is connected with the fourth telescopic device; the connecting plate is provided with a third weighing switch, and the landing door positioning clamping plate is provided with a third switch opening plate matched with the third weighing switch.

The utility model has the following application and working principles: after the steel plate for manufacturing the landing door is subjected to punching procedures, longitudinal side edge bending procedures and butt-welding of the sealing heads on the landing door plate, the reinforcing ribs are longitudinally placed in the middle of the landing door plate through the mechanical arm, then the landing door plate is conveyed to the conveying table III, after the front end of the landing door plate is limited by the landing door plate front section positioning mechanism, the landing door plate is limited and centered by the side surface positioning mechanism, and the landing door plate rear section positioning mechanism is limited. Then clamping devices on the pulleys clamp two sides of the landing door plate, and the landing door plate front section positioning mechanism, the landing door plate rear section positioning mechanism and the side positioning mechanism release the limit of the landing door plate. Then the pulley drives the landing door plate to the lower part of the reinforcing rib positioning mechanism, a first lifting device in the reinforcing rib positioning mechanism drives the lifting frame to move downwards, so that the reinforcing rib positioning clamping plates are positioned on two sides of the reinforcing rib, then the first telescopic device drives the reinforcing rib positioning clamping plates to move oppositely, the reinforcing rib is positioned at the position of the landing door plate to be welded, and then the lifting frame is reset, so that the limit of the reinforcing rib is relieved. The pulley slides on the third conveying table, the layer door plate is conveyed to the second butt-welding machine, and the reinforcing ribs are welded on the layer door plate by the second butt-welding machine, so that the effect of high welding position accuracy is achieved.

The utility model also provides an elevator layer door plate processing production line, which comprises the elevator layer door plate reinforcing rib butt-welding platform, and further comprises a layer door plate feeding platform, a punching platform, a bending platform, a head spot-welding platform and a welding platform which are sequentially arranged; a feeding robot is arranged at the layer door plate feeding platform, a punching machine is arranged at the punching platform, a bending machine and a bending robot are arranged at the bending platform, a butt welding machine I is arranged at the head spot welding platform, and a carrying welding robot and a stacking platform are arranged at the welding platform; a positioning conveying table is arranged between the landing door plate feeding platform and the punching platform, a conveying table I is arranged between the punching platform and the bending platform, a conveying table II and a roll-over stand are arranged between the bending platform and the head spot welding platform, and a conveying table III of the elevator landing door plate reinforcing rib butt welding platform is arranged between the butt welding machine I and the welding platform.

The working principle and the using principle of the utility model are as follows:

when the landing door plate production line works, a steel plate is firstly grabbed and conveyed onto a landing door plate feeding platform through a feeding robot, the steel plate is conveyed to a punching platform through a positioning conveying platform, punching is carried out on a set position of the steel plate through a punching machine, then the steel plate is conveyed to a bending platform through a conveying platform I, the steel plate is grabbed and placed onto a bending machine through a bending robot to bend one longitudinal side of the steel plate, the bending robot places the steel plate on a turnover frame to turn over, the steel plate is grabbed and placed onto the bending machine, the other longitudinal side of the steel plate is bent, the bending robot places the steel plate on a conveying platform II, an upper seal head is placed on the steel plate, the steel plate is continuously conveyed forwards to a seal head spot welding platform, and an upper seal head is welded on the steel plate through a butt welder I. The steel plate is conveyed to the elevator layer door plate reinforcing rib butt-welding platform through the conveying platform III, after the reinforcing ribs are welded, the steel plate is brought to the welding platform by the pulley, the reinforcing ribs and the lower sealing head are spot-welded on the steel plate by the carrying welding robot, and finally the elevator layer door plate after the welding is grabbed to the stacking platform by the carrying welding robot.

The beneficial technical effects of the utility model are as follows: 1. the reinforcing rib positioning mechanism has the characteristic of high positioning precision, and is beneficial to improving the product quality; 2. the whole production process of the production line is finished by automatic equipment, so that a series of operations are greatly saved, the process control accuracy of each link is improved through a set program, the processing precision of the layer door plate is improved, and the labor cost is effectively reduced.

Drawings

Fig. 1 is a schematic structural view of a butt-welded platform for reinforcing ribs of a door panel of an elevator layer in the utility model;

fig. 2 is a schematic view of another angle structure of the butt-welded platform of the reinforcing ribs of the elevator landing door panel in the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

fig. 4 is a schematic diagram of a partial structure of a butt-welded platform for reinforcing ribs of a door panel of an elevator in the utility model;

fig. 5 is a schematic diagram of the internal structure of the butt-welded platform of the reinforcing ribs of the elevator landing door panel in the utility model;

fig. 6 is a process block diagram of the elevator landing door panel processing line of the present utility model;

fig. 7 is a schematic structural diagram of a punching platform and a bending platform of the elevator landing door plate processing production line;

fig. 8 is a schematic structural view of a seal head spot welding platform of the elevator layer door plate processing production line;

in the figure: 1. a landing door plate feeding platform; 2. a punching platform; 3. a bending platform; 4. a head spot welding platform; 5. a welding platform; 6. a feeding robot; 7. punching machine; 8. bending machine; 9. a first butt welding machine; 10. carrying a welding robot; 11. a stacking platform; 12. positioning a conveying table; 13. a first conveying table; 14. a second conveying table; 15. a roll-over stand; 16. a third conveying table; 17. a second butt welding machine; 18. a pulley; 19. a layer door plate front section positioning mechanism; 20. the back section positioning mechanism of the layer door plate; 21. a side positioning mechanism; 22. a clamping device; 23. a fixing frame; 24. a lifting frame; 25. a first lifting device; 26. reinforcing rib positioning clamping plates; 27. a first telescopic device; 28. a first switch bracket; 29. a first weighing switch; 30. a first switch panel; 31. a bending robot; 32. a lifting roller mechanism; 33. a second lifting device; 34. a top plate; 35. a roller bracket; 36. a third lifting device; 37. a limiting plate; 38. a first photoelectric switch; 39. a fourth lifting device; 40. a mounting bracket; 41. a second telescopic device; 42. a positioning plate; 43. a second switch bracket; 44. a second weighing switch; 45. a second switch is plated; 46. landing door locating clamping plates; 47. a third telescoping device; 48. a fourth telescoping device; 49. a third weighing switch; 50. a third switch panel; 51. and a weighing switch.

Detailed Description

The elevator layer door plate reinforcing rib butt-welding platform and the elevator layer door plate processing production line are further described below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, 2, 3 and 4, the butt-welding platform for the reinforcing ribs of the elevator landing door plate comprises a third conveying platform 16, a second butt-welding machine 17 positioned at the front end of the third conveying platform 16 and a pulley 18 arranged at the upper part of the third conveying platform 16 in a sliding manner, wherein a landing door plate front section positioning mechanism 19, a landing door plate rear section positioning mechanism 20 and a side surface positioning mechanism 21 are arranged at the bottom of the third conveying platform 16; the pulley 18 is provided with a clamping device 22 for clamping two sides of the landing door plate; the upper part of the pulley 18 is provided with a reinforcing rib positioning mechanism, the reinforcing rib positioning mechanism comprises a fixed frame 23 and a lifting frame 24, which are positioned at the upper part of the conveying table III 16, and the fixed frame 23 is connected with the lifting frame 24 through a first lifting device 25; the two sides of the bottom of the lifting frame 24 are respectively provided with a reinforcing rib positioning clamping plate 26, and the reinforcing rib positioning clamping plates 26 are respectively connected with the lifting frame 24 through first telescopic devices 27.

After the steel plate for manufacturing the landing door is subjected to punching procedures, longitudinal side edge bending procedures and butt-welding of the sealing heads on the landing door plate, the reinforcing ribs are longitudinally placed in the middle of the landing door plate through the mechanical arm, then the landing door plate is conveyed to the conveying table III 16, after the front end of the landing door plate is limited by the landing door plate front section positioning mechanism 19, the landing door plate is limited and centered by the side surface positioning mechanism 21, and the landing door plate rear section positioning mechanism 20 is limited. Then the clamping devices 22 on the pulley 18 clamp the two sides of the landing door plate, and the landing door plate front section positioning mechanism 19, the landing door plate rear section positioning mechanism 20 and the side surface positioning mechanism 21 release the limit of the landing door plate. Then the pulley 18 drives the landing door plate to the lower part of the reinforcing rib positioning mechanism, the first lifting device 25 in the reinforcing rib positioning mechanism drives the lifting frame 24 to move downwards, so that the reinforcing rib positioning clamping plates 26 are positioned on two sides of the reinforcing rib, then the first telescopic device 27 drives the reinforcing rib positioning clamping plates 26 to move oppositely, the reinforcing rib is positioned at the landing door plate to be welded, and then the lifting frame 24 is reset, so that the limit of the reinforcing rib is relieved. The pulley 18 slides on the third conveying table 16 to convey the layer door plate to the second butt-welding machine 17, and the second butt-welding machine 17 welds the reinforcing ribs on the layer door plate, so that the effect of high welding position accuracy is achieved.

In this embodiment, the third conveyor 16 includes a base and a conveyor roller on the base, the conveyor roller being connected by a chain to a gear drive of a drive motor that provides the conveyor roller with conveyor power. The pulley 18 is of a rectangular frame structure made of aluminum profiles, a sliding block is arranged on the side face of the pulley 18, and a sliding rail matched with the sliding block is arranged on the conveying table III 16. A photoelectric sensor is also provided on the third conveyor 16 for detecting the position of the trolley 18 so that the PLC control system stops the trolley 18 in the set position. The clamping devices 22 are left and right air cylinders arranged on two sides of the inside of the pulley 18, and the air cylinders clamp two sides of the bent steel plate through the piston rod and the positioning round piece positioned at the end part of the piston rod. The fixing frame 23 is arranged above the conveying table III 16 through a bracket, the fixing frame 23 and the lifting frame 24 are both frame bodies made of aluminum profiles, the first lifting device 25 is an air cylinder arranged on the fixing frame 23, and an air cylinder rod is connected with the lifting frame 24, so that the lifting frame 24 can be driven to move up and down. The cylinder of horizontal installation of first telescoping device 27, first telescoping device 27 is equipped with 4 altogether, and two are a set of, and the strengthening rib locating splint 26 of both sides are connected respectively to cylinder body and cylinder pole.

Preferably, a front end of the pulley 18 is also provided with a front section limiting mechanism of the reinforcing rib, which is not shown in the figure. The reinforcing rib front section limiting mechanism comprises a cylinder and a baffle plate connected with a cylinder rod, and when the reinforcing rib positioning clamping plate 26 moves oppositely to clamp the reinforcing rib, the reinforcing rib front section limiting mechanism is started to further limit the reinforcing rib in the longitudinal direction.

Preferably, as shown in fig. 5, a first switch bracket 28 is arranged on the fixed frame 23, the upper end and the lower end of the first switch bracket 28 are respectively provided with a first weighing switch 29, and a first switch opening plate 30 matched with the first weighing switch 29 is arranged on the movable frame.

The first weighing switch 29 is a pressure-type induction switch, when the lifting frame 24 ascends or descends, the first switch board 30 is driven to move up and down, and when the first switch board 30 touches the weighing switch upwards or downwards, the PLC control system controls the first lifting device 25 to stop so as to achieve the purpose of accurately controlling the stroke of the lifting frame 24.

Preferably, as shown in fig. 3, the bottom of the lifting frame 24 is provided with a weighing switch 51 which is matched with the reinforcing rib positioning clamping plate 26. When the first telescopic device 27 drives the reinforcing rib positioning clamping plate 26 to move and touch the weighing switch, the PLC control system controls the first telescopic device 27 to stop so as to achieve the purpose of accurately controlling the travel of the reinforcing rib positioning clamping plate 26.

Preferably, as shown in fig. 3 and 5, the bottom of the third conveying table 16 is provided with a lifting roller mechanism 32, the lifting roller mechanism 32 comprises a second lifting device 33 and a top plate 34 connected with the second lifting device 33, the top plate 34 is provided with a roller bracket 35, and the roller bracket 35 is provided with a roller.

The second lifting device 33 is an air cylinder, and the lifting roller mechanism 32 can move the roller bracket 35 up and down under the driving of the second lifting device 33, and extends out from the position between the rollers on the third conveying table 16 to assist in supporting the landing door plate, so as to facilitate the clamping device 22 to clamp the landing door plate.

Preferably, as shown in fig. 5, the layer door panel front section positioning mechanism 19 includes a third lifting device 36 and a limiting plate 37 connected with the third lifting device 36, and a first photoelectric switch 38 is arranged on the limiting plate 37;

after the front end of the landing door plate passes through the first photoelectric switch 38, the PLC control system controls the third lifting device 36 to start, drives the limiting plate 37 to extend upwards from between the rollers of the conveying table III 16, and limits the front end of the landing door plate.

The landing door plate rear section positioning mechanism 20 comprises a fourth lifting device 39 fixed below the third conveying table 16, the fourth lifting device 39 is connected with a mounting bracket 40, a second telescopic device 41 is arranged on the mounting bracket 40, and the second telescopic device 41 is connected with a positioning plate 42; the bottom of the mounting bracket 40 is provided with a second switch bracket 43, the front end and the rear end of the second switch bracket 43 are respectively provided with a second weighing switch 44, and the positioning plate 42 is provided with a second switch opening plate 45 matched with the second weighing switch 44;

while the layer door panel front section positioning mechanism 19 limits the layer door panel, the PLC control system controls the fourth lifting device 39 of the layer door panel rear section positioning mechanism 20 to start, drives the second telescopic device 41 and the positioning plate 42 on the mounting bracket 40 to lift, and the positioning plate 42 extends out from the position between the rollers of the conveying table III 16 and is positioned at the rear end of the layer door panel, and then the second telescopic device 41 is started to limit the rear end of the layer door panel. The second weighing switch 44 is a pressure type induction switch, when the second telescopic device 41 drives the second switch opening plate 45 to move forwards and backwards, the PLC control system controls the second telescopic device 41 to stop when the second switch opening plate 45 touches the weighing switch forwards or backwards, so that the purpose of accurately controlling the stroke of the positioning plate 42 is achieved.

As shown in fig. 4, the side positioning mechanism 21 comprises a landing door positioning clamping plate 46, a third telescopic device 47 and a fourth telescopic device 48 which are positioned at the bottom of the third conveying table 16, wherein the fourth telescopic device 48 is arranged on a connecting plate at the end part of the third telescopic device 47, and the landing door positioning clamping plate 46 is connected with the fourth telescopic device 48; the connecting plate is provided with a third weighing switch 49, and the landing door locating clamping plate 46 is provided with a third switch opening plate 50 matched with the third weighing switch 49.

The PLC control system controls the third telescopic device 47 to start, and drives the landing door positioning clamping plates 46 on two sides to move oppositely so as to limit the left side and the right side of the landing door plate. The fourth telescoping device 48 serves to fine tune the position of the landing door locating cleat 46. The third weighing switch 49 and the third switch strike plate 50 function as above.

In the present embodiment, the third lifting device 36, the fourth lifting device 39, and the second telescopic device 41 are all cylinders.

As shown in fig. 6, 7 and 8, the elevator landing door plate processing production line comprises the elevator landing door plate reinforcing rib butt-welding platform, and further comprises a landing door plate feeding platform 1, a punching platform 2, a bending platform 3, a head spot-welding platform 4 and a welding platform 5 which are sequentially arranged; a feeding robot 6 is arranged at the landing door plate feeding platform 1, a punching machine 7 is arranged at the punching platform 2, a bending machine 8 and a bending robot 31 are arranged at the bending platform 3, a butt welding machine I9 is arranged at the head spot welding platform 4, and a carrying welding robot 10 and a stacking platform 11 are arranged at the welding platform 5; a positioning conveying table 12 is arranged between the landing door plate feeding platform 1 and the punching platform 2, a conveying table I13 is arranged between the punching platform 2 and the bending platform 3, a conveying table II 14 and a roll-over stand 15 are arranged between the bending platform 3 and the head spot welding platform 4, and a conveying table III 16 of the elevator landing door plate reinforcing rib butt welding platform is arranged between the butt welding machine I9 and the welding platform 5.

When the landing door plate production line works, a steel plate is firstly grabbed and conveyed onto a landing door plate feeding platform 1 through a feeding robot 6, the steel plate is conveyed to a punching platform 2 through a positioning conveying table 12, a punching machine 7 is used for punching holes in a set position of the steel plate, the steel plate is conveyed to a bending platform 3 through a conveying table I13, then the steel plate is grabbed and placed onto a bending machine 8 through a bending robot 31 to bend one longitudinal side of the steel plate, the steel plate is placed onto a turnover frame 15 through the bending robot 31, the steel plate is grabbed and placed onto the bending machine 8 to bend the other longitudinal side of the steel plate, the steel plate is placed onto a conveying table II 14 through the bending robot 31, an upper seal head is placed onto the steel plate, the steel plate is continuously conveyed forwards to a seal head spot welding platform 4, and the upper seal head is welded on the steel plate through a butt welder I9. The steel plate is conveyed to the elevator layer door plate reinforcing rib butt-welding platform through the conveying platform III 16, after the reinforcing ribs are welded, the steel plate is brought to the welding platform 5 by the pulley 18, the reinforcing ribs and the lower seal head are spot-welded on the steel plate by the carrying welding robot 10, and finally the welded elevator layer door plate is grabbed to the stacking platform 11 by the carrying welding robot 10 for placement.

In this embodiment, the feeding robot 6, the bending robot 31, and the transfer welding robot 10 are all mechanical arms with suction cups, and the suction cups provide suction to grasp the steel plate by an air pump. The robots are industrial robots, and specific models are not described in detail. The positioning conveying table 12, the first conveying table 13 and the second conveying table 14 are drum-type conveying tables and are in transmission connection with a driving motor through chains, and conveying power is provided by the driving motor. Guide plates are arranged on two sides of the positioning and conveying table 12 and used for guiding the steel plate in the middle, a photoelectric sensor is further arranged at the front end of the positioning and conveying table 12 and used for detecting the position of the steel plate, when the steel plate reaches a preset punching position, the positioning and conveying table 12 stops, and the punching machine 7 is used for punching the steel plate accurately.

The whole production process of the production line is finished by automatic equipment, so that a series of operations are greatly saved, the process control accuracy of each link is improved through a set program, the processing precision of the layer door plate is improved, and the labor cost is effectively reduced.

Claims

1. The elevator layer door plate reinforcing rib butt-welding platform comprises a conveying table III (16), a butt-welding machine II (17) positioned at the front end of the conveying table III (16) and a pulley (18) arranged on the upper part of the conveying table III (16) in a sliding manner, and is characterized in that a layer door plate front section positioning mechanism (19), a layer door plate rear section positioning mechanism (20) and a side surface positioning mechanism (21) are arranged at the bottom of the conveying table III (16); the pulley (18) is provided with a clamping device (22) for clamping two sides of the landing door plate; the upper part of the pulley (18) is provided with a reinforcing rib positioning mechanism, the reinforcing rib positioning mechanism comprises a fixed frame (23) and a lifting frame (24) which are positioned at the upper part of the conveying table III (16), and the fixed frame (23) is connected with the lifting frame (24) through a first lifting device (25); the two sides of the bottom of the lifting frame (24) are respectively provided with a reinforcing rib positioning clamping plate (26), and the reinforcing rib positioning clamping plates (26) are respectively connected with the lifting frame (24) through first telescopic devices (27).

2. The elevator landing door plate reinforcing rib butt-joint platform according to claim 1, wherein a first switch bracket (28) is arranged on the fixed frame (23), the upper end and the lower end of the first switch bracket (28) are respectively provided with a first weighing switch (29), and a first switch opening plate (30) matched with the first weighing switch (29) is arranged on the movable frame.

3. Elevator landing door panel stiffener butt-joint platform according to claim 1 or 2, characterized in that the bottom of the lifting frame (24) is provided with a weighing switch (51) cooperating with the stiffener locating clamp plate (26).

4. Elevator landing door panel stiffener butt-welded platform according to claim 1 or 2, characterized in that the bottom of the transfer station three (16) is provided with a lifting roller mechanism (32), the lifting roller mechanism (32) comprises a second lifting device (33) and a top plate (34) connected with the second lifting device (33), the top plate (34) is provided with a roller bracket (35), and the roller bracket (35) is provided with a roller.

5. A landing of elevator landing door panel reinforcement bars as claimed in claim 3, characterized in that the bottom of the transfer station three (16) is provided with a lifting roller mechanism (32), the lifting roller mechanism (32) comprises a second lifting device (33) and a top plate (34) connected with the second lifting device (33), the top plate (34) is provided with a roller bracket (35), and the roller bracket (35) is provided with a roller.

6. Elevator landing door panel stiffener butt-joint platform according to claim 1, 2 or 5, characterized in that the landing door panel front section positioning mechanism (19) comprises a third lifting device (36) and a limiting plate (37) connected with the third lifting device (36), wherein the limiting plate (37) is provided with a first photoelectric switch (38); the layer door plate rear section positioning mechanism (20) comprises a fourth lifting device (39) fixed below the conveying table III (16), the fourth lifting device (39) is connected with a mounting bracket (40), a second telescopic device (41) is arranged on the mounting bracket (40), and the second telescopic device (41) is connected with a positioning plate (42); the bottom of the mounting bracket (40) is provided with a second switch bracket (43), both front and rear ends of the second switch bracket (43) are provided with second weighing switches (44), and the positioning plate (42) is provided with a second switch opening plate (45) matched with the second weighing switches (44); the side positioning mechanism comprises a landing door positioning clamping plate (46), a third telescopic device (47) and a fourth telescopic device (48), wherein the landing door positioning clamping plate (46), the third telescopic device (47) and the fourth telescopic device (48) are positioned at the bottom of the conveying platform III (16), the fourth telescopic device (48) is arranged on a connecting plate at the end part of the third telescopic device (47), and the landing door positioning clamping plate (46) is connected with the fourth telescopic device (48); a third weighing switch (49) is arranged on the connecting plate, and a third switch opening plate matched with the third weighing switch (49) is arranged on the landing door positioning clamping plate (46).

7. An elevator landing door plank reinforcing rib butt-welding platform as claimed in claim 3, characterized in that the landing door plank front section positioning mechanism (19) comprises a third lifting device (36) and a limiting plate (37) connected with the third lifting device (36), and a first photoelectric switch (38) is arranged on the limiting plate (37); the layer door plate rear section positioning mechanism (20) comprises a fourth lifting device (39) fixed below the conveying table III (16), the fourth lifting device (39) is connected with a mounting bracket (40), a second telescopic device (41) is arranged on the mounting bracket (40), and the second telescopic device (41) is connected with a positioning plate (42); the bottom of the mounting bracket (40) is provided with a second switch bracket (43), both front and rear ends of the second switch bracket (43) are provided with second weighing switches (44), and the positioning plate (42) is provided with a second switch opening plate (45) matched with the second weighing switches (44); the side positioning mechanism comprises a landing door positioning clamping plate (46), a third telescopic device (47) and a fourth telescopic device (48), wherein the landing door positioning clamping plate (46), the third telescopic device (47) and the fourth telescopic device (48) are positioned at the bottom of the conveying platform III (16), the fourth telescopic device (48) is arranged on a connecting plate at the end part of the third telescopic device (47), and the landing door positioning clamping plate (46) is connected with the fourth telescopic device (48); a third weighing switch (49) is arranged on the connecting plate, and a third switch opening plate matched with the third weighing switch (49) is arranged on the landing door positioning clamping plate (46).

8. The elevator landing door plate reinforcing rib butt-welding platform according to claim 4, wherein the landing door plate front section positioning mechanism (19) comprises a third lifting device (36) and a limiting plate (37) connected with the third lifting device (36), and a first photoelectric switch (38) is arranged on the limiting plate (37); the layer door plate rear section positioning mechanism (20) comprises a fourth lifting device (39) fixed below the conveying table III (16), the fourth lifting device (39) is connected with a mounting bracket (40), a second telescopic device (41) is arranged on the mounting bracket (40), and the second telescopic device (41) is connected with a positioning plate (42); the bottom of the mounting bracket (40) is provided with a second switch bracket (43), both front and rear ends of the second switch bracket (43) are provided with second weighing switches (44), and the positioning plate (42) is provided with a second switch opening plate (45) matched with the second weighing switches (44); the side positioning mechanism comprises a landing door positioning clamping plate (46), a third telescopic device (47) and a fourth telescopic device (48), wherein the landing door positioning clamping plate (46), the third telescopic device (47) and the fourth telescopic device (48) are positioned at the bottom of the conveying platform III (16), the fourth telescopic device (48) is arranged on a connecting plate at the end part of the third telescopic device (47), and the landing door positioning clamping plate (46) is connected with the fourth telescopic device (48); a third weighing switch (49) is arranged on the connecting plate, and a third switch opening plate matched with the third weighing switch (49) is arranged on the landing door positioning clamping plate (46).

9. An elevator landing door plate processing production line, which is characterized by comprising a landing door plate feeding platform (1), a punching platform (2), a bending platform (3), a head spot welding platform (4) and a welding platform (5) which are sequentially arranged, wherein the elevator landing door plate reinforcing rib butt-welding platform is as claimed in any one of claims 1 to 8; a feeding robot (6) is arranged at the landing door plate feeding platform (1), a punching machine (7) is arranged at the punching platform (2), a bending machine (8) and a bending robot (31) are arranged at the bending platform (3), a butt welding machine I (9) is arranged at the head spot welding platform (4), and a carrying welding robot (10) and a stacking platform (11) are arranged at the welding platform (5); a positioning conveying table (12) is arranged between the landing door plate feeding platform (1) and the punching platform (2), a conveying table I (13) is arranged between the punching platform (2) and the bending platform (3), a conveying table II (14) and a turning frame (15) are arranged between the bending platform (3) and the head spot welding platform (4), and a conveying table III (16) of the elevator landing door plate reinforcing rib butt welding platform is arranged between the butt welding machine I (9) and the welding platform (5).