A laser cutting device and cutting method for subway construction

Abstract

The present invention relates to the technical field of laser cutting, and specifically relates to a laser cutting device and a cutting method for subway construction, which solve the problems that the existing laser cutting machine occupies a large space and has a large self-weight, cannot meet the cutting and processing of profiles at the subway construction site, and is not convenient for processing large-sized profiles. The laser cutting device for subway construction includes a mobile chassis mechanism, a slewing bearing mechanism and a laser adjustment mechanism. The upper end surface of the mobile chassis mechanism is provided with a slewing bearing mechanism, the upper end surface of the slewing bearing mechanism is provided with a laser adjustment mechanism, and a workpiece adjustment mechanism is installed on one side of the laser adjustment mechanism. The mobile chassis mechanism includes a mobile seat. By setting a mobile chassis and cooperating with the subway track for driving, the present invention can meet the processing of profiles at different positions of the subway construction site, improve the construction efficiency, and is convenient for loading and unloading and accurately positioning and cutting profiles in different directions.

Description

Technical Field

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

[0002] The subway is a rail transit system operating underground, featuring rapidity, punctuality, and large passenger capacity. It usually provides an efficient and convenient transportation connection between the urban central area and the surrounding suburbs. At the subway construction site, a large number of metal profiles need to be cut, and a laser cutting machine can be used to quickly and precisely process metal profiles. Laser cutting is a process of irradiating a material with a high-power density laser beam to rapidly melt, vaporize it, or reach the ignition point, and blowing away the molten material through a high-speed air flow to achieve cutting.

[0003] The existing laser cutting machines occupy a large space and have a large self-weight, which cannot meet the cutting and processing of profiles at the subway construction site, and it is not convenient to process large-sized profiles; therefore, they do not meet the existing requirements, and for this reason, we propose a laser cutting device and a 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 to solve the problems in the above background art that the existing laser cutting machines occupy a large space and have a large self-weight, cannot meet the cutting and processing of profiles at the subway construction site, and are not convenient to process large-sized profiles.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A laser cutting device for subway construction includes a mobile chassis mechanism, a slewing bearing mechanism, and a laser adjustment mechanism. The upper end surface of the mobile chassis mechanism is equipped with a slewing bearing mechanism, the upper end surface of the slewing bearing mechanism is equipped with a laser adjustment mechanism, and a workpiece adjustment mechanism is installed on one side of the laser adjustment mechanism. The mobile chassis mechanism includes a mobile seat. The inner sides of both ends of the mobile seat are rotatably connected to a first driving cross shaft. Four track wheels are fixedly installed at both ends of the two first driving cross shafts. The middle part of the lower end surface of the mobile seat is fixedly installed with a hydraulic cylinder. The output end of the hydraulic cylinder is fixedly installed with a synchronous push block. The lower end surface of the synchronous push block is rotatably connected to a plurality of brake strips, and a guide rod is movably installed inside the middle part of the brake strips;

[0007] The slewing support mechanism includes a slewing base, the slewing base is fixedly connected to the moving base, a support disc is rotatably connected to the upper end surface of the slewing base, the laser adjustment mechanism includes a first mounting frame, the bottom end of the first mounting frame is fixedly connected to the support disc, a drive box is slidably connected to the inner side of the middle of the first mounting frame, a laser transmission seat is slidably connected to the middle of the drive box, 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.

[0008] Preferably, the mobile chassis mechanism further includes a gear box connected to the middle of one of the first transmission cross shafts, a first transmission motor is fixedly installed on one side of the gear box, a gear set is arranged inside the gear box, and the output end of the first transmission motor penetrates through the gear box and is in transmission connection with one of the first transmission cross shafts through the gear set.

[0009] Preferably, the synchronous push block is slidably connected to the moving base, one ends of a plurality of brake strips are rotatably connected to the synchronous push block through pin shafts, a waist-shaped hole is arranged 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 a plurality of guide rods are fixedly welded to the moving base.

[0010] Preferably, the slewing support mechanism further includes an insulating seat rotatably connected to the slewing base, a battery pack is fixedly installed inside the upper end of the insulating seat, a transmission gear ring is fixedly installed on the outer side of the bottom end of the insulating seat, a plurality of guide gears are installed on the outer side of the transmission gear ring, and a second transmission motor is fixedly installed inside the bottom end of the slewing base.

[0011] Preferably, the output end of the second transmission motor penetrates through the slewing base and is fixedly connected to one of the guide gears, and the transmission gear ring is in meshing connection with a plurality of guide gears through the teeth.

[0012] Preferably, the laser adjustment mechanism further includes a dust-proof cover fixedly connected to the drive box, a fourth transmission motor is fixedly installed at one end of the dust-proof cover, a second transmission screw rod is rotatably connected to the inner side of the dust-proof cover, two dust-proof rolling curtains are installed on both sides of the first mounting frame, one end of the dust-proof rolling curtain is fixedly connected to the drive box, the other end of the dust-proof rolling curtain is rotatably connected to the first mounting frame, a third transmission motor is fixedly installed at 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 a first transmission screw rod is installed on the inner side of the other end of the drive box.

[0013] Preferably, the output end of the third drive motor penetrates through the upper end of the first mounting frame and is connected to the first drive screw through a coupling. The first drive screw is threadedly connected to the drive box. The drive box and the laser drive seat slide linearly along the axis of the first drive screw. The output end of the fourth drive motor penetrates through the dust cover and is connected to the second drive screw through a coupling. The laser drive seat is fixedly connected to both laser positioning probes.

[0014] Preferably, the workpiece adjusting mechanism includes a second mounting frame. The bottom end of the second mounting frame is fixedly connected to the support disk. Inside the upper end of the second mounting frame, a guiding roller and a second drive cross shaft are rotatably connected. At both ends of the second drive cross shaft, winding disks are installed. In the middle of the winding disks, lifting chains are wound. The bottom ends of the two lifting chains are fixedly installed with a material placing seat. On one side of the second mounting frame, a fifth drive motor is fixedly installed.

[0015] Preferably, the output end of the fifth drive motor penetrates through the second mounting frame and is connected to the second drive cross shaft through a coupling. Both ends of the second drive cross shaft are fixedly connected to the two winding disks. The two winding disks and both ends of the material placing seat are connected through lifting chains.

[0016] 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 includes the following steps:

[0017] S1: A moving chassis mechanism and a slewing support mechanism are installed at the bottom ends of the laser adjusting mechanism and the workpiece adjusting mechanism. Specifically, track wheels are installed at the four end corners of the moving seat, so that adjacent track wheels are driven and connected through a first drive cross shaft. The first drive motor is driven and connected to one of the first drive cross shafts through a gear set. When the whole is moved, the moving seat is placed on the subway track, so that the moving seat is in rolling connection with the subway track through the four track wheels;

[0018] S2: Connect the power supply and start the first drive motor, so that the first drive motor drives the track wheels to roll through the gear set and the first drive cross shaft under the support of the gear box, and then the whole can be moved along the subway track to meet the requirement of laser cutting operation at different positions during subway construction. The synchronous push block is rotatably connected to a plurality of brake strips through pins, and a kidney-shaped hole is provided on the lower end surface of the brake strip. The bottom end of the guiding rod is inserted into the inner side of the kidney-shaped hole. Start the hydraulic cylinder, so that the hydraulic cylinder drives a plurality of brake strips to swing on the outer side of the guiding rod through the synchronous push block under the support of the moving seat. Then, one end of each of the plurality of brake strips can be in frictional contact with the side of the subway track, realizing rapid braking and stable locking of the whole, and thus facilitating maintaining stability during the laser cutting process;

[0019] 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. Start the second transmission motor, so that the second transmission motor drives the insulating seat and the rotary seat to rotate through the guide gears and the transmission gear ring under the support of the rotary seat, and then the laser adjustment mechanism and the workpiece adjustment mechanism can be rotationally adjusted to meet the feeding requirements of workpieces in different orientations. During laser cutting, place the workpiece on the material placement seat, start the fifth transmission motor, so that the fifth transmission motor drives the two lifting chains to wind synchronously through the second transmission cross shaft and the two winding discs under the support of the second installation frame, and then the two lifting chains drive the material placement seat to move upward under the guiding action of the second installation frame and the guide rollers, so as to facilitate the adjustment of the height of the workpiece.

[0020] S4: Start the third transmission motor, so that the third transmission motor drives the drive box to slide vertically through the first transmission screw rod under the support of the first installation frame, and the fourth transmission motor drives the laser transmission seat to slide horizontally inside the drive box through the second transmission screw rod under the support of the dust-proof cover, so as to realize the adjustment of the laser transmission seat driving the laser cutting head and the two laser positioning probes to any position inside the first installation frame.

[0021] S5: The two laser positioning probes can be used to perform real-time positioning on the laser cutting process, and then it is convenient to realize the precise cutting operation of the workpiece through the laser transmission seat. Two dust-proof rolling curtains are installed on both sides of the first installation frame, so that the four dust-proof rolling curtains can be closed in real time when the drive box is adjusted vertically, so as to keep the inside of the first installation frame clean and avoid the dust at the subway construction site from entering.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. In the present invention, the moving seat is placed on the subway track, so that the moving seat is in rolling connection with the subway track through four track wheels. The transmission motor drives the track wheels to roll through the gear set and the first transmission cross shaft, and then the whole can be moved along the subway track to meet the requirements of laser cutting operations at different positions during subway construction. The hydraulic cylinder drives a plurality of brake strips to swing on the outer side of the guide rod through the synchronous push block, and then one end of each of the plurality of brake strips can be in frictional contact with the side of the subway track, so as to realize the rapid braking and stable locking of the whole, and then it is convenient to maintain stability during the laser cutting process.

[0024] 2. In the present invention, the second drive motor drives the insulating seat and the rotary seat to rotate through the guide gear and the transmission gear ring, so that the laser adjustment mechanism and the workpiece adjustment mechanism can be rotationally adjusted, meeting the feeding requirements for workpieces in different orientations. The second drive cross shaft and the two winding discs synchronously drive the two lifting chains to wind, and the material placement seat moves upward under the guiding action of the second installation frame and the guide rollers, facilitating the adjustment of the height of the workpiece. The first drive screw rod and the second drive screw rod can enable the laser drive seat to drive the laser cutting head and the two laser positioning probes to be adjusted to any position inside the first installation frame. The two laser positioning probes can perform real-time positioning during the laser cutting process, thus facilitating the precise cutting operation of the workpiece through the laser drive seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0026] Figure 2 is a rear view of the whole of the present invention;

[0027] Figure 3 is a schematic sectional structure diagram of the laser adjustment mechanism of the present invention;

[0028] Figure 4 is a schematic sectional structure diagram of the first installation frame of the present invention;

[0029] Figure 5 is a schematic sectional structure diagram of the slewing support mechanism of the present invention;

[0030] Figure 6 is an exploded structure diagram of the slewing support mechanism of the present invention;

[0031] Figure 7 is a schematic sectional structure diagram of the mobile chassis mechanism of the present invention;

[0032] Figure 8 is a schematic structural diagram of the mobile chassis mechanism of the present invention.

[0033] In the figure: 1. Mobile chassis mechanism; 101. Mobile seat; 102. Track wheel; 103. First transmission horizontal shaft; 104. Brake strip; 105. Synchronous push block; 106. Hydraulic cylinder; 107. Gearbox; 108. First transmission motor; 109. Guide rod; 2. Slewing support mechanism; 201. Slewing seat; 202. Support disc; 203. Insulating seat; 204. Battery pack; 205. Second transmission motor; 206. Transmission gear ring; 207. Guide gear; 3. Laser adjustment mechanism; 301. First mounting frame; 302. Dust cover; 303. Third transmission motor; 304. Fourth transmission motor; 305. Dust-proof rolling curtain; 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 and coiling disc; 407. Second transmission horizontal shaft. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] The hydraulic cylinder 106 (model number HOB80X250-100), the first transmission motor 108 (model number GV50-3.7KW-60-S), the second transmission motor 205 (model number KOM7080), the third transmission motor 303 (model number YEJ3-112M-4), the fourth transmission motor 304 (model number KOM7080), and the fifth transmission motor 405 (model number GV50-3.7KW-60-S) mentioned in the present invention can all be obtained through market procurement or private customization.

[0036] Please refer to 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;

[0037] 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.

[0038] See also Figure 5 and Figure 6, a slewing support mechanism 2 is installed on the upper end surface of the mobile chassis mechanism 1. The slewing support mechanism 2 includes a slewing base 201, the slewing base 201 is fixedly connected to the mobile base 101, a support disk 202 is rotatably connected to the upper end surface of the slewing base 201, an insulating base 203 is rotatably connected to the inner side of the slewing base 201, a battery pack 204 is fixedly installed on the inner side of the upper end of the insulating base 203, a transmission gear ring 206 is fixedly installed on the outer side of the bottom end of the insulating base 203, a plurality of guide gears 207 are installed on the outer side of the transmission gear ring 206, a second transmission motor 205 is fixedly installed on the inner side of the bottom end of the slewing base 201, the output end of the second transmission motor 205 penetrates through the slewing base 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 through meshing between teeth, so that the second transmission motor 205 performs slewing adjustment on the laser adjustment mechanism 3 and the workpiece adjustment mechanism 4 through the guide gears 207 and the transmission gear ring 206, meeting the feeding requirements for workpieces in different orientations.

[0039] Please refer to Figures 1 to 4 , a laser adjustment mechanism 3 is installed on the upper end surface of the slewing support mechanism 2. The laser adjustment mechanism 3 includes a first installation frame 301, the bottom end of the first installation frame 301 is fixedly connected to the support disk 202, two dust-proof rolling curtains 305 are installed on both sides of the first installation frame 301, a drive box 307 is slidably connected to the inner side of the middle part of the first installation frame 301, one end of the dust-proof rolling curtain 305 is fixedly connected to the drive box 307, the other end of the dust-proof rolling curtain 305 is rotatably connected to the first installation frame 301, a laser transmission seat 308 is slidably connected to the middle part of the drive box 307, a laser cutting head 309 is installed at one end of the laser transmission seat 308, two laser positioning probes 312 are installed on both sides of the laser cutting head 309, the laser transmission seat 308 is fixedly connected to the two laser positioning probes 312, and the two laser positioning probes 312 can perform real-time positioning on the laser cutting process, thereby facilitating the precise cutting operation of the workpiece through the laser transmission seat 308;

[0040] A dust-proof cover 302 is fixedly installed on one side of the drive box 307, a fourth transmission motor 304 is fixedly installed at one end of the dust-proof cover 302, a second transmission screw 311 is rotatably connected to the inner side of the dust-proof cover 302, the output end of the fourth transmission motor 304 penetrates through the dust-proof 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 inside the drive box 307 through the second transmission screw 311;

[0041] At the upper end of the first installation frame 301, a third drive motor 303 is fixedly installed. Inside one end of the drive box 307, a guiding column 306 is slidably connected. Inside the other end of the drive box 307, a first drive screw 310 is installed. The output end of the third drive motor 303 penetrates through the upper end of the first installation frame 301 and is connected to the first drive screw 310 through a coupling. The first drive screw 310 is threadedly connected to the drive box 307. The drive box 307 and the laser drive seat 308 perform linear reciprocating sliding along the axis of the first drive screw 310, so that the third drive motor 303 drives the drive box 307 to perform vertical sliding through the first drive screw 310.

[0042] Please refer to Figure 1 and Figure 2 As shown in, on one side of the laser adjustment mechanism 3, a workpiece adjustment mechanism 4 is installed. 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 disk 202. Inside the upper end of the second installation frame 401, a guiding roller 404 and a second drive horizontal shaft 407 are rotatably connected. At both ends of the second drive horizontal shaft 407, winding disks 406 are installed. Both ends of the second drive horizontal shaft 407 are fixedly connected to the two winding disks 406. In the middle of the winding disk 406, a lifting chain 403 is wound. At the bottom ends of the two lifting chains 403, a material placement seat 402 is fixedly installed. The two winding disks 406 and both ends of the material placement seat 402 are connected through the lifting chain 403. On one side of the second installation frame 401, a fifth drive motor 405 is fixedly installed. The output end of the fifth drive motor 405 penetrates through the second installation frame 401 and is connected to the second drive horizontal shaft 407 through a coupling, so that the fifth drive motor 405 drives the two lifting chains 403 to wind synchronously through the second drive horizontal shaft 407 and the two winding disks 406, realizing that the material placement seat 402 drives the workpiece to move upward, thereby facilitating the adjustment of the height of the workpiece.

[0043] The present invention also provides a laser cutting method for subway construction, which is applied to a laser cutting device for subway construction and includes the following steps:

[0044] S1: At the bottom ends of the laser adjustment mechanism 3 and the workpiece adjustment mechanism 4, a mobile chassis mechanism 1 and a slewing support mechanism 2 are installed. Specifically, at the four corner ends of the mobile seat 101, track wheels 102 are installed, so that adjacent track wheels 102 are driven and connected through a first drive horizontal shaft 103. The first drive motor 108 is driven and connected to one of the first drive horizontal shafts 103 through a gear set. When moving the whole, the mobile seat 101 is placed on the subway track, so that the mobile seat 101 is in rolling connection with the subway track through the four track wheels 102;

[0045] S2: Turn on the power supply and start the first drive motor 108, so that the first drive motor 108 drives the track wheels 102 to roll through the gear set and the first drive cross shaft 103 under the support of the gearbox 107, thereby enabling the whole to move along the subway track and meeting the requirement of performing laser cutting operations at different positions during subway construction. The synchronous push block 105 is rotatably connected to a plurality of brake strips 104 through a pin, and a kidney-shaped hole is provided on the lower end surface of the brake strip 104. The bottom end of the guide rod 109 is inserted into the inner side of the kidney-shaped hole. Start the hydraulic cylinder 106, so that the hydraulic cylinder 106 drives a 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. Then, one end of each of the plurality of brake strips 104 can be in frictional contact with the side of the subway track, realizing rapid braking and stable locking of the whole, and thus facilitating maintaining stability during laser cutting;

[0046] 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. Start the second drive motor 205, so that the second drive motor 205 drives the insulating seat 203 and the rotary seat 201 to rotate through the guide gears 207 and the transmission gear ring 206 under the support of the rotary seat 201, thereby enabling the laser adjustment mechanism 3 and the workpiece adjustment mechanism 4 to be rotationally adjusted to meet the requirement of loading workpieces in different orientations. During laser cutting, place the workpiece on the material placing seat 402, and start the fifth drive motor 405, so that the fifth drive motor 405 drives two lifting chains 403 to wind synchronously through the second drive cross shaft 407 and two winding discs 406 under the support of the second installation frame 401. Then, the two lifting chains 403 drive the material placing seat 402 to move upward under the guiding action of the second installation frame 401 and the guide rollers 404, thereby facilitating the adjustment of the height of the workpiece;

[0047] S4: Start the third drive motor 303, so that the third drive motor 303 drives the drive box 307 to slide vertically through the first drive screw 310 under the support of the first installation frame 301, and the fourth drive motor 304 drives the laser drive seat 308 to slide horizontally inside the drive box 307 through the second drive screw 311 under the support of the dust cover 302, realizing the adjustment of the laser drive seat 308 to any position inside the first installation frame 301, driving the laser cutting head 309 and two laser positioning probes 312;

[0048] S5: The real-time positioning of the laser cutting process can be achieved through two laser positioning probes 312, which facilitates the precise cutting operation of the workpiece through the laser driving seat 308. Two dust-proof rolling curtains 305 are installed on both sides of the first installation frame 301, enabling the four dust-proof rolling curtains 305 to be closed in real time when the driving box 307 is adjusted vertically, thereby maintaining the cleanliness inside the first installation frame 301 and preventing the dust at the subway construction site from entering.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A laser cutting device for subway construction, comprising a mobile chassis mechanism (1), a slewing bearing mechanism (2) and a laser adjustment mechanism (3), characterized in that: The upper end surface of the mobile chassis mechanism (1) is installed with a slewing support mechanism (2), the upper end surface of the slewing support mechanism (2) is installed with a laser adjustment mechanism (3), and a workpiece adjustment mechanism (4) is installed on one side of the laser adjustment mechanism (3). The mobile chassis mechanism (1) comprises a mobile seat (101), the inner sides of both ends of the mobile seat (101) are rotatably connected to first transmission transverse shafts (103), and the two ends of the two first transmission transverse shafts (103) are fixedly installed with four track wheels (102), the middle part of the lower end surface of the mobile seat (101) is fixedly installed with a hydraulic cylinder (106), the output end of the hydraulic cylinder (106) is fixedly installed with a synchronous push block (105), and the lower end surface of the synchronous push block (105) is rotatably connected to a plurality of brake strips (104), and the brake strips (10 4) a guide rod (109) is movably installed on the inner side of the middle part; the swivel support mechanism (2) comprises a swivel seat (201), the swivel seat (201) is fixedly connected to the movable seat (101), the upper end surface of the swivel seat (201) is rotatably connected to the support plate (202), the laser adjustment mechanism (3) comprises a first installation frame (301), the bottom end of the first installation frame (301) is fixedly connected to the support plate (202), the inner side of the middle part of the first installation 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); The synchronous push block (105) is slidably connected to the moving 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 moving seat (101); The hydraulic cylinder (106) drives the plurality of brake strips (104) to swing outside the guide rod (109) via the synchronous push block (105), so that one end of the plurality of brake strips (104) can all be in frictional contact with the side of the subway track, thereby achieving rapid braking and stable locking of the entire system, thereby facilitating stability during the laser cutting process.

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 1, characterized in that: The slewing support mechanism (2) further includes an insulating seat (203) rotatably connected to the slewing base (201). Inside the upper end of the insulating seat (203), a battery pack (204) is fixedly installed. Outside the bottom end of the insulating seat (203), a transmission gear ring (206) is fixedly installed. Outside the transmission gear ring (206), a plurality of guide gears (207) are installed. Inside the bottom end of the slewing base (201), a second transmission motor (205) is fixedly installed.

4. The laser cutting device for subway construction according to claim 3, characterized in that: The output end of the second transmission motor (205) penetrates through the slewing base (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 through inter-tooth meshing.

5. The laser cutting device for subway construction according to claim 1, wherein: The laser adjustment mechanism (3) further includes a dust-proof cover (302) fixedly connected to the drive box (307). At one end of the dust-proof cover (302), a fourth transmission motor (304) is fixedly installed. Inside the dust-proof cover (302), a second transmission screw rod (311) is rotatably connected. On both sides of the first mounting frame (301), two dust-proof rolling curtains (305) are installed. One end of the dust-proof rolling curtain (305) is fixedly connected to the drive box (307), and the other end of the dust-proof rolling curtain (305) is rotatably connected to the first mounting frame (301). At the upper end of the first mounting frame (301), a third transmission motor (303) is fixedly installed. Inside one end of the drive box (307), a guide column (306) is slidably connected. Inside the other end of the drive box (307), a first transmission screw rod (310) is installed.

6. The laser cutting device for subway construction according to claim 5, characterized in that: The output end of the third transmission motor (303) penetrates through the upper end of the first mounting frame (301) and is connected to the first transmission screw rod (310) through a coupling. The first transmission screw rod (310) is threadedly connected to the drive box (307). The drive box (307) and the laser transmission seat (308) linearly reciprocate along the axis of the first transmission screw rod (310). The output end of the fourth transmission motor (304) penetrates through the dust-proof cover (302) and is connected to the second transmission screw rod (311) through a coupling. The laser transmission seat (308) is fixedly connected to both laser positioning probes (312).

7. The laser cutting device for subway construction according to claim 5, characterized in that: The workpiece adjustment mechanism (4) includes a second mounting frame (401). The bottom end of the second mounting frame (401) is fixedly connected to the support disk (202). Inside the upper end of the second mounting frame (401), a guide roller (404) and a second transmission cross shaft (407) are rotatably connected. At both ends of the second transmission cross shaft (407), winding disks (406) are installed. In the middle of the winding disk (406), a lifting chain (403) is wound. At the bottom ends of the two lifting chains (403), a material placing seat (402) is fixedly installed. On one side of the second mounting frame (401), a fifth transmission motor (405) is fixedly installed.

8. The laser cutting device for subway construction according to claim 7, wherein: The output end of the fifth driving motor (405) penetrates through the second mounting frame (401) and is connected to the second driving cross shaft (407) through a coupling. Both ends of the second driving cross shaft (407) are fixedly connected to two winding discs (406), and both ends of the two winding discs (406) and the material placing seat (402) are connected through lifting chains (403).

9. A laser cutting method for subway construction, applied to the laser cutting device for subway construction as described in claim 8, characterized in that, It includes the following steps: S1: A moving chassis mechanism (1) and a slewing bearing mechanism (2) are installed at the bottom of the laser adjusting mechanism (3) and the workpiece adjusting mechanism (4). Specifically, track wheels (102) are installed at the four end corners of the moving seat (101), so that two adjacent track wheels (102) are driven and connected through a first driving cross shaft (103). The first driving motor (108) is driven and connected to one of the first driving cross shafts (103) through a gear set. When moving the whole, the moving seat (101) is placed on the subway track, so that the moving seat (101) is in rolling connection with the subway track through four track wheels (102). S2: Connect the power supply and start the first driving motor (108), so that the first driving motor (108) drives the track wheels (102) to roll through the gear set and the first driving cross shaft (103) under the support of the gearbox (107), and then the whole can be moved along the subway track to meet the requirement of laser cutting operation at different positions during subway construction. The synchronous push block (105) is rotatably connected to a plurality of brake strips (104) through a pin, and a kidney-shaped hole is provided on the lower end surface of the brake strip (104). The bottom end of the guide rod (109) is inserted into the inner side of the kidney-shaped hole. Start the hydraulic cylinder (106), so that the hydraulic cylinder (106) drives a 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). Then, one end of each of the plurality of brake strips (104) can be in frictional contact with the side of the subway track, realizing rapid braking and stable locking of the whole, and thus facilitating maintaining stability during laser cutting. 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). Start the second transmission motor (205), so that the second transmission motor (205) drives the insulating seat (203) and the rotary seat (201) to rotate through the guide gears (207) and the transmission gear ring (206) under the support of the rotary seat (201), thereby enabling the laser adjustment mechanism (3) and the workpiece adjustment mechanism (4) to be rotationally adjusted to meet the feeding of workpieces in different orientations. During laser cutting, place the workpiece on the material placement seat (402), and start the fifth transmission motor (405), so that the fifth transmission motor (405) drives the two lifting chains (403) to wind synchronously through the second transmission cross shaft (407) and the two winding discs (406) under the support of the second installation frame (401). Then, the two lifting chains (403) drive the material placement seat (402) to move upward under the guiding action of the second installation frame (401) and the guide rollers (404), thereby facilitating the adjustment of the height of the workpiece; S4: Start 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 rod (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 inside the drive box (307) through the second transmission screw rod (311) under the support of the dust-proof cover (302), realizing the adjustment of the laser transmission seat (308) to drive the laser cutting head (309) and the two laser positioning probes (312) to any position inside the first installation frame (301); S5: The two laser positioning probes (312) can perform real-time positioning during the laser cutting process, thereby facilitating the precise cutting operation of the workpiece through the laser transmission seat (308). Two dust-proof rolling curtains (305) are installed on both sides of the first installation frame (301), so that the four dust-proof rolling curtains (305) can be closed in real time when the drive box (307) is vertically adjusted, thereby maintaining the cleanliness inside the first installation frame (301) and preventing dust from the subway construction site from entering.

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