Intelligent welding device for elevator car bottom

Abstract

The invention belongs to the technical field of laser welding devices, and particularly relates to an elevator car platform intelligent welding device which comprises a welding machine tool, a positioning bearing platform, a moving platform, a welding device body and a welding gun. The device further comprises smoke suction hoods, the smoke suction hoods are installed on the two sides of the bottom of the movable platform and communicate with an installed smoke exhaust device, and shielding brushes are arranged in the positions, away from the center of the movable platform, of the smoke suction hoods. The grinding wheel transversely keeps fixed pressure with the side face of the reinforcing rib under the action of a second adjusting block and a spring, the grinding wheel longitudinally keeps fixed pressure with the bottom plate under the action of a first adjusting block and the spring, a worker starts a grinding motor to drive the grinding wheel to rotate, and the grinding wheel keeps fixed pressure with base metal while rotating for grinding. The grinding uniformity and cleanliness are improved, a clean and flat fusion foundation is provided for welding, welding defects are reduced from the source, the welding seam quality is guaranteed, and therefore the welding effect of the elevator car bottom is improved.

Description

Technical Field

[0001] This invention belongs to the field of laser welding station technology, specifically an intelligent welding device for the bottom of an elevator car. Background Technology

[0002] As the elevator industry develops towards higher speeds, lighter weight, and higher safety, the elevator car floor, as the core load-bearing structure carrying passengers and goods, directly determines the elevator's operational stability and service life through its welding quality. Currently, mainstream elevator car floors are made of cold-rolled steel plates or thin stainless steel plates, and the structure includes key components such as the base plate, frame, and reinforcing ribs. The welding process requires welding multiple parts, and stringent requirements are placed on weld strength, flatness, and corrosion resistance. Throughout the entire process of car bottom welding, both traditional gas shielded welding and laser welding suffer from slag spatter. In laser welding, numerous small slag particles are generated due to issues such as residual oxide scale on the material surface, defocusing deviations, and laser welding process defects. These small slag particles rapidly cool and solidify on the metal surface or embed themselves in the molten pool, forming inclusions and causing quality problems such as incomplete welds and inclusions, thus affecting the welding quality. Furthermore, in traditional processes, the grinding of oxide scale and cleaning of oil stains on a single car bottom piece requires coordinated work by workers, and the pretreatment is disconnected from the welding process, necessitating manual transfer of workpieces, which can easily cause secondary contamination and further increase the risk of welding defects. Moreover, when using a wire wheel to grind oxide scale, the force applied depends on the operator's experience; too little force can leave residual oxide scale, while too much force can lead to work hardening or thinning of the base material, increasing the risk of welding defects. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes an intelligent welding device for the bottom of an elevator car.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: This invention proposes an intelligent welding device for elevator car bottom, including a welding machine tool, a positioning and bearing platform, a moving platform, a welding table, and a welding torch; it also includes: A smoke hood is installed on both sides of the bottom of the moving platform. The smoke hood is connected to the installed smoke exhaust device, and a shielding brush is provided inside the smoke hood away from the center of the moving platform. The shielding brush contacts the positioning support platform. A lifting platform is provided inside the smoke hood, and the lifting platform is connected to the outer shell of the welding table. A sliding rod is slidably connected to the bottom of the lifting platform. The sliding rods are arranged in a straight line and connected to the lifting platform through hardware. A baffle is hinged to the side of the adjacent sliding rods that is close to each other by a torsion spring. One side of the baffle contacts the reinforcing rib in the bottom of the elevator car. The lifting plate is slidably connected to one side of the welding table shell. One end of the lifting plate is located on one side of the baffle plate. One end of the lifting plate is slidably connected to the first adjustment block by a spring. The first adjustment blocks are symmetrically distributed. A second adjustment block is slidably connected to the first adjustment block by a spring. A grinding wheel is rotatably connected to the second adjustment block, and the grinding wheel is connected to a grinding motor installed on the second adjustment block.

[0005] Preferably, positioning plates are symmetrically distributed at one end of the lifting plate, and the positioning plates are located on one side of the first adjusting block. The reinforcing ribs in the elevator car bottom are located between adjacent positioning plates. Rollers are evenly provided on the bottom and adjacent sides of the positioning plates, and the rollers contact the reinforcing ribs and bottom plate in the elevator car bottom. Suction holes are evenly provided on the positioning plates, and the suction holes are connected to the hollow interior of the positioning plates. The interior of the positioning plates is connected to the smoke exhaust device, and the suction holes face the grinding wheel.

[0006] Preferably, a heating cover is provided on one side of the positioning plate, and a heating wire is provided at the bottom of the heating cover; oil-absorbing cotton is provided on the outer surface of the roller, and one side of the roller is located outside the positioning plate, while the other side is located inside the positioning plate.

[0007] Preferably, a cleaning cover is provided on one side of the positioning plate. The cleaning cover is arc-shaped and surrounds the part of the grinding wheel away from the bottom. One end of the cleaning cover is located on the side of the grinding wheel away from the positioning plate. The inside of the cleaning cover is connected to the positioning plate, and the inner circle of the cleaning cover is evenly provided with levers, which are arranged in an alternating manner.

[0008] Preferably, the heating wire portion inside the heating cover is located inside the cleaning cover, and an insulation block is provided at the end of the cleaning cover away from the positioning plate.

[0009] Preferably, the cleaning cover has a groove on one side, and a cleaning rod is slidably connected in the groove by a spring, with a part of the cleaning rod extending out of the groove and contacting the bottom of the insulation block.

[0010] Preferably, the bottom of the cleaning rod is fitted with a rubber sleeve; a rotating platform is installed on the moving platform, and the welding table is installed on the rotating platform.

[0011] Preferably, a cleaning box is provided at one end of the top of the positioning support platform, and the cleaning box contains cleaning agent. A cleaning sponge is provided in the cleaning box and extends out of the opening at the top of the cleaning box.

[0012] Preferably, a cleaning frame is slidably connected to one side of the cleaning box via a spring, and a cleaning sleeve is rotatably connected to the cleaning frame. A cleaning brush is provided inside the cleaning sleeve, and the cleaning sleeve is connected to a cleaning motor installed on the cleaning frame.

[0013] Preferably, heating elements are evenly distributed on the positioning support platform.

[0014] The beneficial effects of this invention are as follows: 1. The intelligent welding device for elevator car bottom described in this invention uses a grinding wheel to maintain a fixed pressure on the side of the reinforcing rib through the action of a second adjusting block and a spring, and to maintain a fixed pressure on the base plate through the action of a first adjusting block and a spring. When the operator starts the grinding motor, the grinding wheel rotates. While the grinding wheel rotates and grinds, it maintains a fixed pressure with the base material, improving the uniformity and cleanliness of the grinding. This provides a clean and flat fusion base for welding, reduces welding defects from the source, ensures weld quality, and thus improves the welding effect of the elevator car bottom.

[0015] 2. In the intelligent welding device for elevator car bottom described in this invention, during the grinding process, the grinding wheel is located between two rows of shielding brushes and below the fume hood. During the grinding process, the fume extraction device draws air around the grinding wheel through the fume hood. The debris, powder, and other impurities generated during grinding are blocked by the shielding brushes and collect below the fume hood. On the other hand, the impurities are drawn away by the suction action, preventing impurities from scattering and adhering to the treated weld seam, which would affect the welding and thus improve the welding quality. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the cleaning box; Figure 3 This is a schematic diagram showing the cross-section of the mobile platform; Figure 4 This is a diagram showing the state of the weld when the grinding wheel comes into contact with it; Figure 5 The state diagram is formed when the grinding wheel is moved away from the weld seam. Figure 6 yes Figure 5 A schematic diagram of the grinding wheel section; Figure 7 It is a 3D view of the cleaning cover; Figure 8 This is a schematic diagram with the heating cover as the viewpoint when the grinding wheel contacts the weld. In the diagram: Welding machine tool 1, Positioning bearing platform 11, Moving platform 12, Welding table 13, Welding torch 14, Fume hood 15, Shielding brush 16, Lifting platform 17, Slide rod 18, Baffle 19, Lifting plate 2, Adjusting block 1 21, Adjusting block 22, Grinding wheel 23, Grinding motor 24, Positioning plate 25, Roller 26, Suction hole 27, Heating cover 28, Cleaning cover 29, Toggle lever 3, Insulation block 31, Slide groove 32, Cleaning rod 33, Rubber sleeve 34, Rotating platform 35, Cleaning box 36, Cleaning sponge 37, Cleaning rack 38, Cleaning sleeve 39, Cleaning brush 4, Cleaning motor 41, Heating element 42. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: To effectively solve the above problems, see the attached diagram in the instruction manual. Figures 1-8 As shown, an intelligent welding device for elevator car bottom includes a welding machine tool 1, a positioning and bearing platform 11, a moving platform 12, a welding table 13, and a welding torch 14; it also includes: A smoke hood 15 is installed on both sides of the bottom of the moving platform 12. The smoke hood 15 is connected to the installed smoke exhaust device. A shielding brush 16 is provided inside the smoke hood 15 away from the center of the moving platform 12. The shielding brush 16 contacts the positioning support platform 11. A lifting platform 17 is provided inside the smoke hood 15. The lifting platform 17 is connected to the outer shell of the welding table 13. A sliding rod 18 is slidably connected to the bottom of the lifting platform 17. The sliding rods 18 are arranged in a straight line and are connected to the lifting platform 17 through hardware. A baffle 19 is hinged to the side of the adjacent sliding rods 18 that is close to each other through a torsion spring. One side of the baffle 19 contacts the reinforcing rib in the bottom of the elevator car. Lifting plate 2 is slidably connected to one side of the outer shell of welding table 13. One end of lifting plate 2 is located on one side of baffle 19. One end of lifting plate 2 is slidably connected to adjustment block 21 by spring. Adjustment block 21 is symmetrically distributed. Adjustment block 22 is slidably connected to adjustment block 21 by spring. Grinding wheel 23 is rotatably connected to adjustment block 22. Grinding wheel 23 is connected to grinding motor 24 installed on adjustment block 22. The positioning and bearing platform 11 is a conventional tooling platform on the welding machine tool 1, used to fix components such as the base plate in the elevator car bottom under the welding torch 14; the moving platform 12 is a conventional XYZ three-axis displacement platform on the welding machine tool 1, used to drive the welding table 13 and the welding torch 14 to complete the moving welding work; the welding machine tool is equipped with a welding table and connected to the welding torch 14, the welding table is a conventional welding host, used to control the operation of the welding torch 14; the welding torch 14 is a laser welding torch 14 or a gas shielded welding torch 14, which is installed by integrating the welding table 13 and the welding torch 14. On the mobile platform 12, personnel can more easily install and change welding types according to welding type or welding needs; gas shielded welding is used for welding the load-bearing frame of the car bottom, such as thick plates, and laser welding is used for the car bottom plate, such as thin plates; the fume extraction device is a conventional configuration in the welding machine tool 1 for extracting welding waste gas; the welding table 13 controls the lifting and moving of the welding torch 14 to approach the weld; by setting the combined action of the lifting platform 17 and the lifting plate 2, grinding and shielding can be installed as needed, and the bolt connection makes disassembly convenient, improving the ease of use; Specific workflow: First, the base materials, such as parts in the elevator car bottom, are installed and fixed on the positioning and bearing platform 11. Then, personnel start the welding machine 1 according to the welding process. When there is a lot of oil, debris, and other impurities on the base material, the welding table 13 is closed and the moving platform 12 is started. The moving platform 12 drives the welding table 13 to descend, and the welding table 13 drives the lifting plate 2 to descend. The lifting plate 2 drives the grinding wheel 23 to descend and contact the base material through the first adjusting block 21 and the second adjusting block 22. During the process of the grinding wheel 23 descending along the surface of the base material, for example, due to the squeezing and guiding effect of the shape of the reinforcing ribs in the base material, the grinding wheel 23 slides on the first adjusting block 21 through the second adjusting block 22, so that the two adjacent grinding wheels 23 move away from each other. The grinding wheel 23 descends to the bottom plate of the reinforcing rib. The grinding wheel 23 drives the first adjusting block 21 to rise along the lifting plate 2 through the second adjusting block 22 until the grinding wheel 23 is in contact with the bottom plate of the reinforcing rib. At this time, the grinding wheel 23 maintains a fixed pressure on the side of the reinforcing rib through the action of the second adjusting block 22 and the spring, and maintains a fixed pressure on the bottom plate through the action of the first adjusting block 21 and the spring. The operator starts the grinding motor 24 to drive the grinding wheel 23 to rotate. While the grinding wheel 23 rotates and grinds, it maintains a fixed pressure with the base material, improves the uniformity and cleanliness of grinding, provides a clean and flat fusion base for welding, reduces welding defects from the source, ensures the quality of the weld, and thus improves the welding effect of the elevator car bottom. Furthermore, conventional pressure sensors can be installed on the spring connection points of the first adjustment block 21 and the second adjustment block 22 to monitor the contact pressure between the grinding wheel 23 and the base material, thereby adjusting the contact force between the grinding wheel 23 and the base material. For example, after grinding for a long time, the steel wire of the grinding wheel 23 may curl up and coil, causing the outer ring size to decrease. Installing a pressure sensor can maintain the grinding contact pressure of the grinding wheel 23, maintain a good grinding effect, and prevent the grinding force from becoming too light, resulting in a large amount of oil or oxide scale residue on the base material, which may affect welding. This reduces defects such as welding slag inclusions and improves welding quality. Furthermore, during the grinding process, the grinding wheel 23 is positioned between the two rows of shielding brushes 16 and below the fume hood 15. During grinding, the fume extraction device draws air from around the grinding wheel 23 through the fume hood 15. The debris, powder, and other impurities generated during grinding are blocked by the shielding brushes 16 and collect below the fume hood 15. On the other hand, the impurities are removed by the suction action, preventing them from scattering and adhering to the treated weld seam, which would affect the welding and thus improve the welding quality. Moreover, the shielding brushes 16 are closely arranged, and the moving platform 12 moves the shielding brushes 16 through the fume hood 15. The bottom of the shielding brushes 16 sweeps the surface of the base material, removing easily cleanable impurities that fall off the surface of the base material in advance, reducing the workload of the grinding wheel 23, improving the cleaning efficiency of the elevator car bottom, and thus improving the welding efficiency. When the base material is relatively clean, personnel can choose to perform grinding in front and welding behind simultaneously. For example, the moving platform 12 lowers the welding table 13 to the side of the welding position, the welding torch 14 is in the off state, and the grinding wheel 23 contacts the base material and is in the grinding state as described above. When the moving platform 12 moves the welding torch 14 close to the welding part of the base material, the welding part on the base material is ground and impurities are removed, improving the cleanliness of the welding environment. Furthermore, the simultaneous grinding and welding can improve welding efficiency and shorten the time required for the entire welding process. Moreover, the two sliding rods 18 slide to both sides of the reinforcing rib in the base material and are fixed by bolts in the hardware. During the moving welding, the two sliding rods 18 contact the reinforcing rib in the base material along a fixed path. If a part of the reinforcing rib is slightly twisted, it can be corrected by the sliding rods 18, and welding is completed at the same time as the correction. The corrected reinforcing rib is fixed, improving the welding position accuracy and thus improving the welding quality. Furthermore, when the slide bar 18 descends and contacts the reinforcing rib in the base material, the baffle plate 19 is squeezed and swings to both sides of the reinforcing rib in the base material until it blocks the weld seam away from the welding torch 14, blocking the welding slag that splashes during welding, maintaining the cleanliness of the weld seam, and thus improving the welding quality. In addition, the baffle plate 19 can also concentrate the welding fumes, gathering the fumes on the side of the baffle plate 19 away from the grinding wheel 23, so that the high-temperature metal fumes containing impurities can be promptly drawn away by the fume hood 15 while preventing the fumes from flowing into the grinding area. This process has an impact, thereby improving the cleanliness of the base material and thus improving the welding quality. Moreover, the local temperature increase caused by grinding of the base material can cause the trace amounts of oil residue on the surface of the base material to evaporate due to heat, reducing the risk of oil burning and porosity during welding. The slightly heated base material can reduce heat loss from the molten pool in the early stage of welding, helping the molten pool to form quickly and remain stable, avoiding defects such as insufficient penetration and lack of fusion due to the base material being too cold, and adapting to welding operations in low-temperature environments. In addition, welding should be carried out immediately after grinding the base material to avoid high-temperature oxidation. After welding is completed, the weld can be ground again according to the grinding process described above to further improve the welding quality and aesthetics.

[0020] Example 2: Based on Embodiment 1, positioning plates 25 are symmetrically distributed at one end of the lifting plate 2, and the positioning plates 25 are located on one side of the first adjusting block 21. The reinforcing ribs in the elevator car bottom are located between adjacent positioning plates 25. Rollers 26 are evenly provided at the bottom and on the adjacent side of the positioning plates 25, and the rollers 26 contact the reinforcing ribs and the bottom plate in the elevator car bottom. Suction holes 27 are evenly provided on the positioning plates 25, and the suction holes 27 are connected to the hollow interior of the positioning plates 25. The interior of the positioning plates 25 is connected to the smoke exhaust device, and the suction holes 27 face the grinding wheel 23. The positioning plate 25 is provided with a heating cover 28 on one side, and a heating wire is provided at the bottom of the heating cover 28; the roller 26 is provided with oil-absorbing cotton on its outer surface, and one side of the roller 26 is located outside the positioning plate 25, while the other side is located inside the positioning plate 25; the heating wire is a conventional heating appliance, including a heating resistance wire, which heats up after being energized, thereby increasing the temperature of the heating cover 28. The positioning plate 25 is provided with a cleaning cover 29 on one side. The cleaning cover 29 is arc-shaped and surrounds the part of the grinding wheel 23 away from the bottom. One end of the cleaning cover 29 is located on the side of the grinding wheel 23 away from the positioning plate 25. The interior of the cleaning cover 29 is connected to the positioning plate 25, and the inner circle of the cleaning cover 29 is evenly provided with levers 3, which are arranged in an alternating manner. The heating wire portion inside the heating cover 28 is located inside the cleaning cover 29, and a heat insulation block 31 is provided at the end of the cleaning cover 29 away from the positioning plate 25; The specific workflow is as follows: The lifting plate 2 descends, causing the positioning plate 25 to descend as well. The positioning plate 25 then causes the rollers 26 to descend and contact both sides of the reinforcing rib. Since the ends of the rollers 26 are rounded, they do not cause scratches or other defects when moving along the surface of the reinforcing rib, thus avoiding affecting the integrity of the weld. When the positioning plate 25 descends to the bottom and the rollers 26 contact the base plate of the base material, the grinding wheel 23 also contacts the weld area at the same time. When the lifting plate 2 moves, the rollers 26 at the bottom of the positioning plate 25 roll and press the base plate of the base material, flattening it on the positioning bearing platform 11. The rolling action flattens the base plate, and after flattening, there are no height differences, depressions, or protrusions in the base material to be welded. During welding, the heat can be transferred evenly, and the molten pool can fully contact the base material on both sides, avoiding insufficient local penetration due to uneven surfaces and reducing the incidence of defects such as incomplete penetration and incomplete fusion. Furthermore, if there are sharp protrusions or steps in the area to be welded, stress concentration points are likely to form in that area after welding, which may cause weld cracking under long-term stress. After leveling, the surface is smooth, the transition between the weld and the base material is natural, the stress distribution is more uniform, and the overall load-bearing capacity and fatigue resistance of the car bottom can be improved. Moreover, a flat surface to be welded can reduce the dead corners of slag accumulation during welding, and post-weld cleaning is more convenient. At the same time, it avoids poor weld formation caused by uneven surface, reduces the amount of subsequent grinding and correction work, and shortens the process time. Furthermore, the rollers 26 located on both sides of the reinforcing rib flatten the reinforcing rib by squeezing, and at the same time correct the slightly bent reinforcing rib by squeezing, in conjunction with the corrective action of the slide bar 18, increase the corrective pressure of the reinforcing rib and increase the corrective force, thereby improving the welding position accuracy. Since the positioning plate 25 is located on one side of the grinding wheel 23, the powder generated by the friction of the grinding wheel 23 is discharged to the suction hole 27 on the positioning plate 25. The positioning plate 25 helps to block the brush 16 to block impurities, and at the same time, it improves the impurity removal efficiency by being sucked at close range through the suction hole 27 by the smoke exhaust device, thereby avoiding the dust generated by grinding from spreading and affecting the welding environment, thus improving the welding quality. By setting up a heating cover 28, the heating wire is energized and heats up during grinding or welding, increasing the temperature of the heating cover 28. Since the heating cover 28 is close to the weld, it heats or contacts the base material at close range, heating the oil stains on the base material to improve its fluidity. Then, when the roller 26 passes over the oil stain area, the oil stains are absorbed by the oil-absorbing cotton. After absorbing the oil, the oil-absorbing cotton rotates away from the base material and enters the positioning plate 25. The positioning plate 25 sucks the oil-absorbing cotton to remove the oil stains. As the oil-absorbing cotton is about to rotate out of the positioning plate 25, the inner wall of the positioning plate 25 scrapes the oil-absorbing cotton, squeezing out the absorbed oil stains again or collecting them away from the oil-absorbing cotton, reducing the oil stains on the base material, improving the cleanliness of the base material, and thus improving the welding quality. Furthermore, since the cleaning cover 29 is arc-shaped and surrounds the part of the grinding wheel 23 away from the bottom, when the grinding wheel 23 rotates and grinds, if impurities are trapped inside the grinding wheel 23 and are thrown towards the welding area away from the positioning plate 25, the cleaning cover 29 can intercept and block them in time, collecting the thrown impurities inside the cleaning cover 29. The positioning plate 25 then removes the collected impurities through the cleaning cover 29, preventing the impurities from being thrown away and scattered. By setting up levers 3, when the grinding wheel 23 rotates and passes through the staggered levers 3, the levers 3 reciprocate to move the steel wire in the grinding wheel 23, moving the steel wire left and right back and forth, so that the impurities trapped inside can be discharged in time, preventing re-contamination of the grinding area. Moreover, the staggered levers 3 can also straighten the steel wire in the grinding wheel 23, straightening the curled and bent steel wire, preventing the outer ring size of the grinding wheel 23 from changing too much, which would reduce the grinding effect. By setting up the insulation block 31, the insulation pipe can be made of high-temperature resistant insulation materials such as non-shedding insulation sponge. The heating wire heats the cleaning cover 29 and the insulation block 31. After the cleaning cover 29 is heated, it can keep the oil stains splashed on the surface with good fluidity, making it easy to collect and drain away. The insulation block 31 insulates or heats the weld and surrounding area after grinding, which helps the molten pool to form quickly and remain stable, thereby improving the welding quality.

[0021] Example 3: Based on Embodiment 2, a groove 32 is provided on one side of the cleaning cover 29, and a cleaning rod 33 is slidably connected in the groove 32 by a spring. A part of the cleaning rod 33 extends out of the groove 32 and contacts the bottom of the heat preservation block 31. The mobile platform 12 is equipped with a rotating platform 35, and the welding table 13 is installed on the rotating platform 35; the rotating platform 35 is a conventional bearing platform that is driven to rotate by a motor. Specific workflow: When the cleaning cover 29 is above the base material, the cleaning rod 33 is at the bottom of the insulation block 31; when the cleaning cover 29 descends and contacts the base material, the cleaning rod 33 is squeezed and slides obliquely upward along the slide groove 32. The bottom of the cleaning rod 33 scrapes the bottom of the insulation block 31. The rubber sleeve 34 at the bottom of the cleaning rod 33 is made of wear-resistant rubber. During the movement, it scrapes the surface of the base material, scraping and intercepting residual oil and impurities at the bottom of the insulation block 31. This allows the insulation block 31 to retain heat while cleaning the surface of the base material, improving the cleanliness of the base material and thus improving the welding quality. Furthermore, after the cleaning cover rises, the cleaning rod 33 slides obliquely downward to reset under the influence of the spring. The cleaning rod 33 scrapes the impurities generated during the wiping of the bottom of the insulation block 31, scraping the impurities off and cleaning the insulation block 31, improving the cleanliness of the insulation block 31 and thus maintaining the cleaning ability of the insulation block 31. When it is necessary to change the welding direction, the moving platform 12 raises the welding table 13, and then the platform 35 rotates to drive the welding table 13 to rotate and change the direction to meet the welding requirements.

[0022] Example 4: Based on Embodiment 3, a cleaning box 36 is provided at one end of the top of the positioning support platform 11, and the cleaning box 36 stores cleaning agent. A cleaning sponge 37 is provided in the cleaning box 36 and extends out of the opening at the top of the cleaning box 36. The cleaning agent is a conventional agent used to clean oil stains and welding slag. The cleaning box 36 is slidably connected to a cleaning frame 38 by a spring on one side, and a cleaning sleeve 39 is rotatably connected to the cleaning frame 38. A cleaning brush 4 is provided inside the cleaning sleeve 39, and the cleaning sleeve 39 is connected to a cleaning motor 41 installed on the cleaning frame 38. Heating elements 42 are evenly distributed on the positioning support platform 11; the heating elements 42 are conventional heating components installed inside the support platform. Specific workflow: By setting up the cleaning box 36, after a welding work cycle is completed, the moving platform 12 drives the welding table 13 to move past the top of the cleaning sponge 37. The cleaning sponge 37 wipes the heating cover 28, grinding wheel 23 and other parts, washing away the oil stains on the surface of the parts, improving the cleanliness of the parts, and avoiding the accumulation of oil stains that could contaminate the subsequent welding base material. Simple operation can clean most working parts, thereby improving welding efficiency. When the welding torch 14 moves above the cleaning sleeve 39, it descends and extends into the cleaning sleeve 39. Since the cleaning sleeve 39 is slidably connected to one side of the cleaning box 36 via the cleaning frame 38, and the opening of the cleaning sleeve 39 is funnel-shaped, the welding torch 14 head can slide along the inner wall of the funnel opening of the cleaning sleeve 39 to enter the interior. This facilitates the alignment of the welding torch 14 head with the cleaning sleeve 39, shortens the cleaning time, and improves welding efficiency. Then, the cleaning motor 41 drives the cleaning sleeve 39 to rotate. The cleaning sleeve 39 is equipped with cleaning brushes 4 and other professional tools for cleaning the welding torch 14 head. The rotation of the cleaning sleeve 39 scrapes off and removes the welding slag adhering to the welding torch 14 head due to spatter, improving the cleanliness of the welding torch 14 head. This avoids defects caused by welding slag during welding, extends the service life of the torch head, and reduces the number of times the welding torch 14 is stopped due to welding slag, thereby improving welding efficiency.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent welding device for elevator car bottom, comprising a welding machine tool (1), a positioning and bearing platform (11), a moving platform (12), a welding table (13), and a welding torch (14); characterized in that, Also includes: A smoking hood (15) is installed on both sides of the bottom of the mobile platform (12). The smoking hood (15) is connected to the installed smoke exhaust device. A shielding brush (16) is provided inside the smoking hood (15) away from the center of the mobile platform (12). The shielding brush (16) contacts the positioning bearing platform (11). A lifting platform (17) is provided inside the smoking hood (15). The lifting platform (17) is connected to the outer shell of the welding table (13). A sliding rod (18) is slidably connected to the bottom of the lifting platform (17). The sliding rods (18) are arranged in a straight line. The sliding rods (18) are connected to the lifting platform (17) through hardware. A baffle (19) is hinged to the side of the adjacent sliding rods (18) that are close to each other through a torsion spring. One side of the baffle (19) contacts the reinforcing rib in the bottom of the elevator car. The lifting plate (2) is slidably connected to one side of the outer shell of the welding table (13). One end of the lifting plate (2) is located on one side of the baffle (19). One end of the lifting plate (2) is slidably connected to the first adjustment block (21) by a spring. The first adjustment block (21) is symmetrically distributed. The first adjustment block (21) is slidably connected to the second adjustment block (22) by a spring. The second adjustment block (22) is rotatably connected to the grinding wheel (23), and the grinding wheel (23) is connected to the grinding motor (24) installed on the second adjustment block (22).

2. The intelligent welding device for elevator car bottom according to claim 1, characterized in that: The lifting plate (2) has symmetrically distributed positioning plates (25) at one end, and the positioning plates (25) are located on one side of the first adjusting block (21). The reinforcing ribs in the elevator car bottom are located between adjacent positioning plates (25). Rollers (26) are evenly provided on the bottom and adjacent side of the positioning plates (25), and the rollers (26) contact the reinforcing ribs and bottom plate in the elevator car bottom. Suction holes (27) are evenly provided on the positioning plates (25), and the suction holes (27) are connected to the hollow interior of the positioning plates (25). The interior of the positioning plates (25) is connected to the smoke exhaust device, and the suction holes (27) face the grinding wheel (23).

3. The intelligent welding device for elevator car bottom according to claim 2, characterized in that: The positioning plate (25) is provided with a heating cover (28) on one side, and a heating wire is provided at the bottom of the heating cover (28); the roller (26) is provided with oil-absorbing cotton on its outer surface, and one side of the roller (26) is located outside the positioning plate (25), while the other side is located inside the positioning plate (25).

4. The intelligent welding device for elevator car bottom according to claim 3, characterized in that: The positioning plate (25) is provided with a cleaning cover (29) on one side. The cleaning cover (29) is an arc-shaped part surrounding the grinding wheel (23) away from the bottom. One end of the cleaning cover (29) is located on the side of the grinding wheel (23) away from the positioning plate (25). The inside of the cleaning cover (29) is connected to the positioning plate (25), and the inner circle of the cleaning cover (29) is evenly provided with levers (3), which are arranged in an alternating manner.

5. The intelligent welding device for elevator car bottom according to claim 4, characterized in that: The heating wire portion inside the heating cover (28) is located inside the cleaning cover (29), and a heat-insulating block (31) is provided at the end of the cleaning cover (29) away from the positioning plate (25).

6. The intelligent welding device for elevator car bottom according to claim 5, characterized in that: The cleaning cover (29) has a groove (32) on one side, and a cleaning rod (33) is slidably connected in the groove (32) by a spring. A part of the cleaning rod (33) extends out of the groove (32) and contacts the bottom of the heat preservation block (31).

7. The intelligent welding device for elevator car bottom according to claim 1, characterized in that: The bottom of the cleaning rod (33) is fitted with a rubber sleeve (34); a rotating platform (35) is installed on the moving platform (12), and a welding table (13) is installed on the rotating platform (35).

8. The intelligent welding device for elevator car bottom according to claim 1, characterized in that: The top end of the positioning support platform (11) is provided with a cleaning box (36), and the cleaning box (36) contains cleaning agent. The cleaning box (36) is provided with a cleaning sponge (37) that extends out of the opening at the top of the cleaning box (36).

9. The intelligent welding device for elevator car bottom according to claim 8, characterized in that: The cleaning box (36) is slidably connected to a cleaning frame (38) by a spring on one side, and a cleaning sleeve (39) is rotatably connected to the cleaning frame (38). A cleaning brush (4) is provided inside the cleaning sleeve (39), and the cleaning sleeve (39) is connected to a cleaning motor (41) installed on the cleaning frame (38).

10. The intelligent welding device for elevator car bottom according to claim 9, characterized in that: Heating elements (42) are evenly distributed on the positioning support platform (11).

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