Laser cutting device and cutting method for subway construction

Abstract

The invention relates to the technical field of laser cutting, in particular to a laser cutting device and method for subway construction, and solves the problems that an existing laser cutting machine is large in occupied space and dead weight, cannot meet the requirement for cutting and machining of profiles on a subway construction site, and is inconvenient to machine and operate large-size profiles. The laser cutting device for subway construction comprises a movable chassis mechanism, a rotary supporting mechanism and a laser adjusting mechanism, the rotary supporting mechanism is installed on the upper end face of the movable chassis mechanism, the laser adjusting mechanism is installed on the upper end face of the rotary supporting mechanism, and a workpiece adjusting mechanism is installed on one side of the laser adjusting mechanism. And the movable chassis mechanism comprises a movable seat. The movable chassis is arranged and is matched with the subway track for driving, so that the requirement for machining profiles on subway construction sites at different positions can be met, the construction efficiency is improved, and the profiles in different directions can be conveniently fed, discharged and accurately positioned and cut.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and in particular to a laser cutting device and a cutting method for subway construction. Background Art

[0002] The subway is a rail transit system that runs underground, featuring fast, punctual, and large passenger capacity. It usually provides efficient and convenient transportation connections between the central area of ​​a city and the surrounding suburbs. A large number of metal profiles need to be cut at the subway construction site, and the use of laser cutting machines can quickly and accurately process metal profiles. Laser cutting uses a high-power density laser beam to irradiate the material, causing it to melt, vaporize, or reach the ignition point quickly, and then blows away the molten material through a high-speed airflow, thereby achieving the cutting process.

[0003] The existing laser cutting machines occupy a large space and have a large weight, which cannot meet the requirements of cutting profiles at subway construction sites, and are not convenient for processing large-size profiles. Therefore, they do not meet the existing needs. We have proposed a laser cutting device and cutting method for subway construction. Summary of the invention

[0004] The purpose of the present invention is to provide a laser cutting device and a cutting method for subway construction, so as to solve the problem mentioned in the above background technology that the existing laser cutting machine occupies a large space and has a large weight, cannot meet the cutting and processing of profiles at the subway construction site, and is not convenient for processing large-size profiles.

[0005] To achieve the above object, the present invention provides the following technical solutions: A laser cutting device for subway construction, comprising a mobile chassis mechanism, a slewing support mechanism and a laser adjustment mechanism, wherein the upper end surface of the mobile chassis mechanism is provided with a slewing support mechanism, the upper end surface of the slewing support mechanism is provided with a laser adjustment mechanism, a workpiece adjustment mechanism is provided on one side of the laser adjustment mechanism, the mobile chassis mechanism comprises a mobile seat, the inner sides of both ends of the mobile seat are rotatably connected with a first transmission transverse shaft, the two ends of the first transmission transverse shafts are fixedly provided with four track wheels, a hydraulic cylinder is fixedly provided with a synchronous push block at the middle of the lower end surface of the mobile seat, a synchronous push block is fixedly provided with a synchronous push block at the output end, a plurality of brake strips are rotatably connected with the lower end surface of the synchronous push block, and a guide rod is movably provided with an inner side of the middle of the brake strip; The swivel support mechanism includes a swivel seat, which is fixedly connected to the movable seat, and the upper end surface of the swivel seat is rotatably connected to a support plate. The laser adjustment mechanism includes a first mounting frame, the bottom end of the first mounting frame is fixedly connected to the support plate, the inner side of the middle part of the first mounting frame is slidably connected to a drive box, the middle part of the drive box is slidably connected to a laser transmission seat, a laser cutting head is installed at one end of the laser transmission seat, and laser positioning probes are installed on both sides of the laser cutting head.

[0006] Preferably, the mobile chassis mechanism also includes a gear box connected to the middle part of one of the first transmission transverse shafts, a first transmission motor is fixedly mounted on one side of the gear box, a gear set is provided on the inner side of the gear box, and the output end of the first transmission motor passes through the gear box and is connected to one of the first transmission transverse shafts through the gear set.

[0007] Preferably, the synchronous push block is slidably connected to the movable seat, one end of the plurality of brake strips is rotatably connected to the synchronous push block through a pin, a waist-shaped hole is provided in the middle of the brake strip, the bottom end of the guide rod is inserted into the inner side of the waist-shaped hole, and the upper ends of the plurality of guide rods are welded and fixed to the movable seat.

[0008] Preferably, the swivel support mechanism also includes an insulating seat rotatably connected to the swivel seat, a battery pack is fixedly mounted on the inner side of the upper end of the insulating seat, a transmission gear ring is fixedly mounted on the outer side of the bottom end of the insulating seat, a plurality of guide gears are mounted on the outer side of the transmission gear ring, and a second transmission motor is fixedly mounted on the inner side of the bottom end of the swivel seat.

[0009] Preferably, the output end of the second transmission motor passes through the swivel seat and is fixedly connected to one of the guide gears, and the transmission ring gear and the plurality of guide gears are connected through inter-tooth meshing.

[0010] Preferably, the laser adjustment mechanism also includes a dust cover fixedly connected to the drive box, a fourth transmission motor is fixedly installed on one end of the dust cover, the inner side of the dust cover is rotatably connected to the second transmission screw, two dustproof roller shutters are installed on both sides of the first mounting frame, one end of the dustproof roller shutter is fixedly connected to the drive box, the other end of the dustproof roller shutter is rotatably connected to the first mounting frame, a third transmission motor is fixedly installed on the upper end of the first mounting frame, a guide column is slidably connected to the inner side of one end of the drive box, and the first transmission screw is installed on the inner side of the other end of the drive box.

[0011] Preferably, the output end of the third transmission motor passes through the upper end of the first mounting frame and is connected to the first transmission screw through a coupling, the first transmission screw is connected to the drive box through a thread, the drive box and the laser transmission seat slide linearly back and forth along the axis of the first transmission screw, the output end of the fourth transmission motor passes through the dust cover and is connected to the second transmission screw through a coupling, and the laser transmission seat is fixedly connected to both laser positioning probes.

[0012] Preferably, the workpiece adjustment mechanism includes a second mounting frame, the bottom end of the second mounting frame is fixedly connected to the support plate, the inner side of the upper end of the second mounting frame is rotatably connected to a guide roller and a second transmission horizontal shaft, both ends of the second transmission horizontal shaft are installed with a winding disk, a lifting chain is wound around the middle of the winding disk, a material placing seat is fixedly installed at the bottom end of the two lifting chains, and a fifth transmission motor is fixedly installed on one side of the second mounting frame.

[0013] Preferably, the output end of the fifth transmission motor passes through the second mounting frame and is connected to the second transmission horizontal shaft through a coupling, the two ends of the second transmission horizontal shaft are fixedly connected to the two winding disks, and the two winding disks are connected to the two ends of the material placement seat through a lifting chain.

[0014] The present invention also provides a laser cutting method for subway construction, which is applied to the laser cutting device for subway construction as described above, and comprises the following steps: S1: A mobile chassis mechanism and a slewing support mechanism are installed at the bottom ends of the laser adjustment mechanism and the workpiece adjustment mechanism. Specifically, rail wheels are installed at the four end corners of the mobile seat, so that adjacent rail wheels are connected by a first transmission transverse shaft, and the first transmission motor is connected to one of the first transmission transverse shafts by a gear set. When the whole is moved, the mobile seat is placed on the subway track, so that the mobile seat and the subway track are rollingly connected through the four rail wheels; S2: Turn on the power supply and start the first transmission motor, so that the first transmission motor drives the track wheel to roll through the gear set and the first transmission transverse axis under the support of the gear box, so that the whole can be moved along the subway track to achieve the requirements of laser cutting operations at different positions during subway construction. The synchronous push block is rotatably connected with multiple brake strips through a pin, and the lower end surface of the brake strip is provided with a waist-shaped hole, and the bottom end of the guide rod is plugged into the inner side of the waist-shaped hole. The hydraulic cylinder is started, so that the hydraulic cylinder drives the multiple brake strips to swing on the outside of the guide rod through the synchronous push block under the support of the moving seat, so that one end of the multiple brake strips can all be in friction contact with the side of the subway track, so as to achieve rapid braking and stable locking of the whole, so as to facilitate maintaining stability during the laser cutting process; S3: A transmission gear ring is fixedly installed on the outer side of the bottom end of the insulating seat, and a plurality of guide gears are installed on the outer side of the transmission gear ring. The second transmission motor is started, so that the second transmission motor drives the insulating seat and the swivel seat to rotate through the guide gear and the transmission gear ring under the support of the swivel seat, so that the laser adjustment mechanism and the workpiece adjustment mechanism can be swivel-adjusted to meet the needs of loading workpieces in different orientations. During laser cutting, the workpiece is placed on the material placement seat, and the fifth transmission motor is started, so that the fifth transmission motor drives the two lifting chains to be wound synchronously through the second transmission horizontal axis and the two winding disks under the support of the second mounting frame, and then the two lifting chains drive the material placement seat to move upward under the guidance of the second mounting frame and the guide roller, so as to facilitate the adjustment of the height of the workpiece; S4: starting the third transmission motor, so that the third transmission motor drives the driving box to slide vertically through the first transmission screw under the support of the first installation frame, and the fourth transmission motor drives the laser transmission seat to slide horizontally on the inner side of the driving box through the second transmission screw under the support of the dust cover, so that the laser transmission seat drives the laser cutting head and the two laser positioning probes to adjust to any position on the inner side of the first installation frame; S5: The laser cutting process can be positioned in real time through two laser positioning probes, which makes it easier to achieve precise cutting of the workpiece through the laser transmission seat. Two dustproof roller shutters are installed on both sides of the first mounting frame, so that the four dustproof roller shutters can be closed in real time when the drive box is adjusted vertically, thereby keeping the inside of the first mounting frame clean and preventing dust from entering the subway construction site.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention places the moving seat on the subway track, so that the moving seat and the subway track are connected by rolling through four track wheels. The transmission motor drives the track wheels to roll through the gear set and the first transmission horizontal shaft, so that the whole can be moved along the subway track, and the requirements of laser cutting operations at different positions during subway construction are met. The hydraulic cylinder drives multiple brake strips to swing on the outside of the guide rod through the synchronous push block, and then one end of the multiple brake strips can be in friction contact with the side of the subway track, so as to achieve rapid braking and stable locking of the whole, so as to facilitate maintaining stability during the laser cutting process; 2. The present invention drives the insulating seat and the rotating seat to rotate through the guide gear and the transmission gear ring by the second transmission motor, so as to perform rotation adjustment on the laser adjustment mechanism and the workpiece adjustment mechanism to meet the needs of loading workpieces in different orientations. The two lifting chains are synchronously driven to be wound through the second transmission horizontal axis and the two winding disks, and the material placement seat is moved upward under the guidance of the second mounting frame and the guide roller, so as to facilitate the adjustment of the height of the workpiece. The laser transmission seat can drive the laser cutting head and the two laser positioning probes to adjust to any position on the inner side of the first mounting frame through the first transmission screw and the second transmission screw. The laser cutting process can be positioned in real time through the two laser positioning probes, so as to facilitate the precise cutting operation of the workpiece through the laser transmission seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A rear side view of the present invention as a whole; Figure 3 It is a schematic cross-sectional structure diagram of the laser adjustment mechanism of the present invention; Figure 4 is a schematic cross-sectional structural diagram of a first installation frame of the present invention; Figure 5 It is a schematic cross-sectional structure diagram of the rotary support mechanism of the present invention; Figure 6 It is a schematic diagram of the exploded structure of the slewing support mechanism of the present invention; Figure 7 It is a schematic cross-sectional structure diagram of the mobile chassis mechanism of the present invention; Figure 8 It is a structural schematic diagram of the mobile chassis mechanism of the present invention.

[0017] In the figure: 1. Mobile chassis mechanism; 101. Mobile seat; 102. Track wheel; 103. First transmission horizontal axis; 104. Brake strip; 105. Synchronous push block; 106. Hydraulic cylinder; 107. Gear box; 108. First transmission motor; 109. Guide rod; 2. Rotary support mechanism; 201. Rotary seat; 202. Support plate; 203. Insulation seat; 204. Battery pack; 205. Second transmission motor; 206. Transmission gear ring; 207. Guide gear; 3. Laser adjustment mechanism; 301. First installation frame; 302. 02. Dust cover; 303. Third transmission motor; 304. Fourth transmission motor; 305. Dustproof roller shutter; 306. Guide column; 307. Drive box; 308. Laser transmission seat; 309. Laser cutting head; 310. First transmission screw; 311. Second transmission screw; 312. Laser positioning probe; 4. Workpiece adjustment mechanism; 401. Second mounting frame; 402. Material placement seat; 403. Lifting chain; 404. Guide roller; 405. Fifth transmission motor; 406. Winding disk; 407. Second transmission horizontal axis. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] The hydraulic cylinder 106 (model HOB80X250-100), the first transmission motor 108 (model GV50-3.7KW-60-S), the second transmission motor 205 (model KOM7080), the third transmission motor 303 (model YEJ3-112M-4), the fourth transmission motor 304 (model KOM7080) and the fifth transmission motor 405 (model GV50-3.7KW-60-S) mentioned in the present invention can all be purchased from the market or obtained through private customization.

[0020] See also Figures 1 to 8, an embodiment provided by the present invention: a laser cutting device for subway construction, comprising a mobile chassis mechanism 1, a slewing support mechanism 2 and a laser adjustment mechanism 3, the mobile chassis mechanism 1 comprising a mobile seat 101, the inner sides of both ends of the mobile seat 101 are rotatably connected with first transmission transverse shafts 103, four rail wheels 102 are fixedly installed at both ends of the two first transmission transverse shafts 103, a gear box 107 is installed in the middle of one of the first transmission transverse shafts 103, a first transmission motor 108 is fixedly installed on one side of the gear box 107, a gear set is provided on the inner side of the gear box 107, an output end of the first transmission motor 108 passes through the gear box 107 and is connected to one of the first transmission transverse shafts 103 through a gear set, so that the first transmission motor 108 drives the rail wheel 102 to roll through the gear set and the first transmission transverse shaft 103, and then the whole can be moved along the subway track, so as to realize the requirement of laser cutting operation at different positions during subway construction; A hydraulic cylinder 106 is fixedly installed in the middle of the lower end surface of the moving seat 101, and a synchronous push block 105 is fixedly installed at the output end of the hydraulic cylinder 106. The synchronous push block 105 is slidably connected to the moving seat 101, and a plurality of brake strips 104 are rotatably connected to the lower end surface of the synchronous push block 105. One end of the plurality of brake strips 104 is rotatably connected to the synchronous push block 105 through a pin, and a guide rod 109 is movably installed on the inner side of the middle part of the brake strip 104. A waist-shaped hole is provided in the middle part of the brake strip 104, and the bottom end of the guide rod 109 is inserted into the inner side of the waist-shaped hole. The upper ends of the plurality of guide rods 109 are welded and fixed to the moving seat 101, so that the hydraulic cylinder 106 drives the plurality of brake strips 104 to swing on the outer side of the guide rod 109 through the synchronous push block 105, and then one end of the plurality of brake strips 104 can all be in friction contact with the side of the subway track, so as to achieve rapid braking and stable locking of the whole, thereby facilitating stability during the laser cutting process.

[0021] See also Figure 5 and Figure 6The upper end surface of the mobile chassis mechanism 1 is equipped with a swivel support mechanism 2, which includes a swivel seat 201, which is fixedly connected to the mobile seat 101, and the upper end surface of the swivel seat 201 is rotatably connected to a support plate 202, and the inner side of the swivel seat 201 is rotatably connected to an insulating seat 203, and a battery pack 204 is fixedly installed on the inner side of the upper end of the insulating seat 203, and a transmission gear ring 206 is fixedly installed on the outer side of the bottom end of the insulating seat 203, and a plurality of guides are installed on the outer side of the transmission gear ring 206. Gear 207, a second transmission motor 205 is fixedly installed on the inner side of the bottom end of the rotating seat 201, the output end of the second transmission motor 205 passes through the rotating seat 201 and is fixedly connected to one of the guide gears 207, the transmission ring gear 206 and the multiple guide gears 207 are connected through inter-tooth meshing, so that the second transmission motor 205 can rotate and adjust the laser adjustment mechanism 3 and the workpiece adjustment mechanism 4 through the guide gear 207 and the transmission ring gear 206 to meet the needs of loading workpieces in different orientations.

[0022] See also Figures 1 to 4 A laser adjustment mechanism 3 is installed on the upper end surface of the slewing support mechanism 2, and the laser adjustment mechanism 3 includes a first mounting frame 301, the bottom end of the first mounting frame 301 is fixedly connected to the support plate 202, and two dustproof roller shutters 305 are installed on both sides of the first mounting frame 301, and a driving box 307 is slidably connected to the inner side of the middle of the first mounting frame 301, one end of the dustproof roller shutter 305 is fixedly connected to the driving box 307, and the other end of the dustproof roller shutter 305 is rotatably connected to the first mounting frame 301, and a laser transmission seat 308 is slidably connected to the middle of the driving box 307, and a laser cutting head 309 is installed at one end of the laser transmission seat 308, and laser positioning probes 312 are installed on both sides of the laser cutting head 309, and the laser transmission seat 308 is fixedly connected to the two laser positioning probes 312, and the laser cutting process can be positioned in real time through the two laser positioning probes 312, so as to facilitate the precise cutting operation of the workpiece through the laser transmission seat 308; A dust cover 302 is fixedly installed on one side of the driving box 307, a fourth transmission motor 304 is fixedly installed on one end of the dust cover 302, a second transmission screw 311 is rotatably connected to the inner side of the dust cover 302, an output end of the fourth transmission motor 304 penetrates the dust cover 302 and is connected to the second transmission screw 311 through a coupling, and the fourth transmission motor 304 drives the laser transmission seat 308 to slide horizontally on the inner side of the driving box 307 through the second transmission screw 311; A third transmission motor 303 is fixedly installed on the upper end of the first mounting frame 301, a guide column 306 is slidably connected to the inner side of one end of the drive box 307, and a first transmission screw 310 is installed on the inner side of the other end of the drive box 307. The output end of the third transmission motor 303 passes through the upper end of the first mounting frame 301 and is connected to the first transmission screw 310 through a coupling. The first transmission screw 310 is threadedly connected to the drive box 307, and the drive box 307 and the laser transmission seat 308 slide linearly back and forth along the axis of the first transmission screw 310, so that the third transmission motor 303 drives the drive box 307 to slide vertically through the first transmission screw 310.

[0023] See also Figure 1 and Figure 2 A workpiece adjustment mechanism 4 is installed on one side of the laser adjustment mechanism 3. The workpiece adjustment mechanism 4 includes a second installation frame 401. The bottom end of the second installation frame 401 is fixedly connected to the support plate 202. The inner side of the upper end of the second installation frame 401 is rotatably connected to a guide roller 404 and a second transmission horizontal shaft 407. Both ends of the second transmission horizontal shaft 407 are installed with a winding disk 406. Both ends of the second transmission horizontal shaft 407 are fixedly connected to the two winding disks 406. A lifting chain 403 is wound around the middle of the winding disk 406. The bottom ends of the two lifting chains 403 are fixedly installed with a A material placing seat 402 is provided, and two winding drums 406 are connected to both ends of the material placing seat 402 through a lifting chain 403. A fifth transmission motor 405 is fixedly installed on one side of the second mounting frame 401. The output end of the fifth transmission motor 405 passes through the second mounting frame 401 and is connected to the second transmission horizontal shaft 407 through a coupling, so that the fifth transmission motor 405 synchronously drives the two lifting chains 403 to wind through the second transmission horizontal shaft 407 and the two winding drums 406, so that the material placing seat 402 drives the workpiece to move upward, thereby facilitating the adjustment of the height of the workpiece.

[0024] The present invention also provides a laser cutting method for subway construction, which is applied to a laser cutting device for subway construction and comprises the following steps: S1: A mobile chassis mechanism 1 and a slewing support mechanism 2 are installed at the bottom ends of the laser adjustment mechanism 3 and the workpiece adjustment mechanism 4. Specifically, rail wheels 102 are installed at the four end corners of the mobile seat 101, so that adjacent rail wheels 102 are connected by a first transmission horizontal shaft 103, and the first transmission motor 108 is connected to one of the first transmission horizontal shafts 103 by a gear set. When the whole is moved, the mobile seat 101 is placed on the subway track, so that the mobile seat 101 is rollingly connected to the subway track through the four rail wheels 102; S2: Turn on the power supply and start the first transmission motor 108, so that the first transmission motor 108 drives the track wheel 102 to roll through the gear set and the first transmission horizontal shaft 103 under the support of the gear box 107, so that the whole can be moved along the subway track to achieve the requirements of laser cutting operations at different positions during subway construction. The synchronous push block 105 is rotatably connected with multiple brake strips 104 through a pin, and the lower end surface of the brake strip 104 is provided with a waist-shaped hole, and the bottom end of the guide rod 109 is plugged into the inner side of the waist-shaped hole. Start the hydraulic cylinder 106, so that the hydraulic cylinder 106 drives the multiple brake strips 104 to swing on the outside of the guide rod 109 through the synchronous push block 105 under the support of the moving seat 101, so that one end of the multiple brake strips 104 can all be in friction contact with the side of the subway track, so as to achieve rapid braking and stable locking of the whole, so as to facilitate maintaining stability during the laser cutting process; S3: A transmission gear ring 206 is fixedly installed on the outer side of the bottom end of the insulating seat 203, and a plurality of guide gears 207 are installed on the outer side of the transmission gear ring 206. The second transmission motor 205 is started, so that the second transmission motor 205 drives the insulating seat 203 and the swivel seat 201 to rotate through the guide gear 207 and the transmission gear ring 206 under the support of the swivel seat 201, so that the laser adjustment mechanism 3 and the workpiece adjustment mechanism 4 can be swivel-adjusted to meet the needs of loading workpieces in different orientations. During laser cutting, the workpiece is placed on the material placement seat 402, and the fifth transmission motor 405 is started, so that the fifth transmission motor 405, under the support of the second mounting frame 401, drives the two lifting chains 403 to wind synchronously through the second transmission horizontal shaft 407 and the two winding disks 406, and then the two lifting chains 403 drive the material placement seat 402 to move upward under the guidance of the second mounting frame 401 and the guide roller 404, so as to facilitate the adjustment of the height of the workpiece; S4: Start the third transmission motor 303, so that the third transmission motor 303 drives the driving box 307 to slide vertically through the first transmission screw 310 under the support of the first installation frame 301, and the fourth transmission motor 304 drives the laser transmission seat 308 to slide horizontally on the inner side of the driving box 307 through the second transmission screw 311 under the support of the dust cover 302, so that the laser transmission seat 308 drives the laser cutting head 309 and the two laser positioning probes 312 to adjust to any position on the inner side of the first installation frame 301; S5: The laser cutting process can be positioned in real time through two laser positioning probes 312, so as to facilitate the precise cutting operation of the workpiece through the laser transmission seat 308. Two dustproof roller shutters 305 are installed on both sides of the first installation frame 301, so that the four dustproof roller shutters 305 can be closed in real time when the drive box 307 is adjusted vertically, so as to keep the inside of the first installation frame 301 clean and prevent dust from entering the subway construction site.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A laser cutting device for subway construction, comprising a mobile chassis mechanism (1), a slewing support mechanism (2) and a laser adjustment mechanism (3), characterized in that: The upper end surface of the mobile chassis mechanism (1) is mounted with a slewing support mechanism (2), the upper end surface of the slewing support mechanism (2) is mounted with a laser adjustment mechanism (3), one side of the laser adjustment mechanism (3) is mounted with a workpiece adjustment mechanism (4), the mobile chassis mechanism (1) comprises a mobile seat (101), the inner sides of both ends of the mobile seat (101) are rotatably connected with first transmission transverse shafts (103), the two ends of the first transmission transverse shafts (103) are fixedly mounted with four track wheels (102), the middle part of the lower end surface of the mobile seat (101) is fixedly mounted with a hydraulic cylinder (106), the output end of the hydraulic cylinder (106) is fixedly mounted with a synchronous push block (105), the lower end surface of the synchronous push block (105) is rotatably connected with a plurality of brake strips (104), the brake strips (104) are fixedly mounted with a plurality of brake strips (104), and the brake strips (104) are fixedly mounted with a plurality of brake strips (104). 04) A guide rod (109) is movably installed on the inner side of the middle part; the slewing support mechanism (2) includes a slewing seat (201), the slewing seat (201) is fixedly connected to the moving seat (101), and the upper end surface of the slewing seat (201) is rotatably connected to the support plate (202); the laser adjustment mechanism (3) includes a first mounting frame (301), the bottom end of the first mounting frame (301) is fixedly connected to the support plate (202), the inner side of the middle part of the first mounting frame (301) is slidably connected to a drive box (307), the middle part of the drive box (307) is slidably connected to a laser transmission seat (308), one end of the laser transmission seat (308) is installed with a laser cutting head (309), and both sides of the laser cutting head (309) are installed with laser positioning probes (312).

2. The laser cutting device for subway construction according to claim 1, characterized in that: The mobile chassis mechanism (1) further comprises a gear box (107) connected to the middle of one of the first transmission transverse shafts (103); a first transmission motor (108) is fixedly mounted on one side of the gear box (107); a gear set is provided on the inner side of the gear box (107); an output end of the first transmission motor (108) passes through the gear box (107) and is transmission-connected to one of the first transmission transverse shafts (103) via the gear set.

3. The laser cutting device for subway construction according to claim 2, characterized in that: The synchronous push block (105) is slidably connected to the movable seat (101), one end of the plurality of brake strips (104) is rotatably connected to the synchronous push block (105) via a pin, a waist-shaped hole is provided in the middle of the brake strip (104), the bottom end of the guide rod (109) is plugged into the inner side of the waist-shaped hole, and the upper ends of the plurality of guide rods (109) are welded and fixed to the movable seat (101).

4. The laser cutting device for subway construction according to claim 1, characterized in that: The slewing support mechanism (2) further comprises an insulating seat (203) rotatably connected to the slewing seat (201); a battery pack (204) is fixedly mounted on the inner side of the upper end of the insulating seat (203); a transmission gear ring (206) is fixedly mounted on the outer side of the bottom end of the insulating seat (203); a plurality of guide gears (207) are mounted on the outer side of the transmission gear ring (206); and a second transmission motor (205) is fixedly mounted on the inner side of the bottom end of the slewing seat (201).

5. The laser cutting device for subway construction according to claim 4 is characterized in that: The output end of the second transmission motor (205) passes through the swivel seat (201) and is fixedly connected to one of the guide gears (207); the transmission gear ring (206) and the plurality of guide gears (207) are all connected via inter-tooth meshing.

6. The laser cutting device for subway construction according to claim 1, characterized in that: The laser adjustment mechanism (3) further comprises a dust cover (302) fixedly connected to a drive box (307); a fourth transmission motor (304) is fixedly mounted on one end of the dust cover (302); a second transmission screw (311) is rotatably connected to the inner side of the dust cover (302); two dust-proof roller curtains (305) are mounted on both sides of the first mounting frame (301); one end of the dust-proof roller curtain (305) is fixedly connected to the drive box (307); the other end of the dust-proof roller curtain (305) is rotatably connected to the first mounting frame (301); a third transmission motor (303) is fixedly mounted on the upper end of the first mounting frame (301); a guide column (306) is slidably connected to the inner side of one end of the drive box (307); and a first transmission screw (310) is mounted on the inner side of the other end of the drive box (307).

7. The laser cutting device for subway construction according to claim 6, characterized in that: The output end of the third transmission motor (303) passes through the upper end of the first mounting frame (301) and is connected to the first transmission screw (310) via a coupling; the first transmission screw (310) is connected to the drive box (307) via a threaded connection; the drive box (307) and the laser transmission seat (308) slide linearly back and forth along the axis of the first transmission screw (310); the output end of the fourth transmission motor (304) passes through the dust cover (302) and is connected to the second transmission screw (311) via a coupling; the laser transmission seat (308) is fixedly connected to both laser positioning probes (312).

8. The laser cutting device for subway construction according to claim 6, characterized in that: The workpiece adjustment mechanism (4) comprises a second mounting frame (401), the bottom end of the second mounting frame (401) is fixedly connected to the support plate (202), the inner side of the upper end of the second mounting frame (401) is rotatably connected to a guide roller (404) and a second transmission horizontal shaft (407), both ends of the second transmission horizontal shaft (407) are mounted with a winding disk (406), a lifting chain (403) is wound around the middle of the winding disk (406), a material placing seat (402) is fixedly mounted at the bottom ends of the two lifting chains (403), and a fifth transmission motor (405) is fixedly mounted on one side of the second mounting frame (401).

9. The laser cutting device for subway construction according to claim 8, characterized in that: The output end of the fifth transmission motor (405) passes through the second mounting frame (401) and is connected to the second transmission transverse shaft (407) via a coupling; both ends of the second transmission transverse shaft (407) are fixedly connected to two winding disks (406); and both ends of the two winding disks (406) are connected to the material placement seat (402) via a lifting chain (403).

10. A laser cutting method for subway construction, applied to the laser cutting device for subway construction as claimed in claim 9, characterized in that: The following steps are involved: S1: A movable chassis mechanism (1) and a slewing support mechanism (2) are installed at the bottom ends of the laser adjustment mechanism (3) and the workpiece adjustment mechanism (4), and specifically, rail wheels (102) are installed at the four end corners of the movable seat (101), so that adjacent rail wheels (102) are connected by a first transmission transverse shaft (103), and the first transmission motor (108) is connected to one of the first transmission transverse shafts (103) by a gear set. When the whole is moved, the movable seat (101) is placed on the subway track, so that the movable seat (101) and the subway track are rollingly connected through the four rail wheels (102); S2: Turning on the power supply, starting the first transmission motor (108), so that the first transmission motor (108) drives the track wheel (102) to roll through the gear set and the first transmission horizontal shaft (103) under the support of the gear box (107), so that the whole can be moved along the subway track, so as to achieve the requirement of laser cutting operations at different positions during subway construction, the synchronous push block (105) is rotatably connected with the plurality of brake strips (104) through a pin, and the lower end surface of the brake strip (104) is provided with a waist-shaped hole, and the bottom end of the guide rod (109) is plugged into the inner side of the waist-shaped hole, and the hydraulic cylinder (106) is started, so that the hydraulic cylinder (106) drives the plurality of brake strips (104) to swing on the outer side of the guide rod (109) through the synchronous push block (105) under the support of the moving seat (101), so that one end of the plurality of brake strips (104) can all be in friction contact with the side of the subway track, so as to achieve rapid braking and stable locking of the whole, so as to facilitate maintaining stability during the laser cutting process; S3: A transmission gear ring (206) is fixedly mounted on the outer side of the bottom end of the insulating seat (203), and a plurality of guide gears (207) are mounted on the outer side of the transmission gear ring (206). The second transmission motor (205) is started, so that the second transmission motor (205) drives the insulating seat (203) and the swivel seat (201) to rotate through the guide gears (207) and the transmission gear ring (206) under the support of the swivel seat (201), thereby being able to perform swivel adjustment on the laser adjustment mechanism (3) and the workpiece adjustment mechanism (4), thereby meeting the requirements for workpieces in different directions. During laser cutting, the workpiece is placed on the material placement seat (402), and the fifth transmission motor (405) is started, so that the fifth transmission motor (405) synchronously drives the two lifting chains (403) to be wound through the second transmission horizontal shaft (407) and the two winding disks (406) under the support of the second installation frame (401), and then the two lifting chains (403) drive the material placement seat (402) to move upward under the guidance of the second installation frame (401) and the guide roller (404), so as to facilitate the adjustment of the height of the workpiece; S4: starting the third transmission motor (303), so that the third transmission motor (303) drives the drive box (307) to slide vertically through the first transmission screw (310) under the support of the first installation frame (301), and the fourth transmission motor (304) drives the laser transmission seat (308) to slide horizontally on the inner side of the drive box (307) through the second transmission screw (311) under the support of the dust cover (302), so that the laser transmission seat (308) drives the laser cutting head (309) and the two laser positioning probes (312) to adjust to any position on the inner side of the first installation frame (301); S5: The laser cutting process can be positioned in real time by two laser positioning probes (312), thereby facilitating the precise cutting operation of the workpiece by the laser transmission seat (308). Two dustproof roller shutters (305) are installed on both sides of the first installation frame (301), so that the four dustproof roller shutters (305) can be closed in real time when the drive box (307) is adjusted vertically, thereby keeping the inside of the first installation frame (301) clean and preventing dust from entering the subway construction site.

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