Pre-splitting contour cutting device and method based on laser cutting

Abstract

The invention provides a presplitting contour cutting device and method based on laser cutting, and belongs to the technical field of laser cutting. Comprising a mounting supporting piece, and an in-place clamping piece is mounted on the mounting supporting piece and used for keeping cutting stable; a self-adaptive cutting piece is mounted on the mounting support piece; the self-adaptive cutting piece is used for cutting the inner wall of the tunnel; a rolling calibration piece is mounted on the self-adaptive cutting piece; the rolling calibration piece is used for calibrating a punching position; and a depth detection piece is mounted on the self-adaptive cutting piece. By arranging the power connection switch, the situation that a laser cutting machine can be normally started for cutting work after a worker stably clamps and fits the structure to the two sides of the inner wall of a tunnel can be limited; the problems that according to an existing pre-splitting contour cutting device based on laser cutting, cutting work cannot be conveniently carried out on the premise that the cutting stability is guaranteed, and the cutting groove depth standard reaching performance cannot be conveniently prompted in real time are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and in particular to a pre-crack contour cutting device and method based on laser cutting. Background Art

[0002] During tunnel construction, blasting is carried out on the tunnel wall, mainly for smooth blasting or pre-splitting blasting technology. The core purpose is to achieve precise shaping of the excavation contour, minimize surrounding rock disturbance and optimize construction costs through precise control of the explosion energy. Pre-splitting contour cutting is required during blasting.

[0003] The current pre-crack contour cutting device based on laser cutting is not convenient for automatic control of drilling position marking during cutting, manual measurement and marking is time-consuming and labor-intensive, and it is also not convenient for cutting work to be performed under the premise of ensuring cutting stability. Manual hand-held cutting has poor stability, which affects the cutting quality. At the same time, it is poor in safety and is not convenient for real-time prompting of whether the cutting depth meets the standard, which can easily directly affect the subsequent blasting quality. Therefore, the present application provides a pre-crack contour cutting device and method based on laser cutting to meet the needs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pre-crack contour cutting device and method based on laser cutting to solve the problem that the existing pre-crack contour cutting device based on laser cutting is not convenient for cutting under the premise of ensuring cutting stability, and is not convenient for real-time prompting of whether the cutting depth meets the standard.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A pre-splitting contour cutting device based on laser cutting includes a mounting support, on which a clamping member is mounted, and the clamping member is used to maintain cutting stability; an adaptive cutting member is mounted on the mounting support; the adaptive cutting member is used to cut the inner wall of a tunnel; a rolling calibration member is mounted on the adaptive cutting member; the rolling calibration member is used to calibrate the punching position; a depth detection member is mounted on the adaptive cutting member; an alarm prompt member is mounted on the depth detection member; the mounting support includes: a support mounting shell and a counter-screw, on which a counter-screw is rotatably mounted; reverse threads are provided on both sides of the counter-screw; and rectangular slots are provided on both sides of the support mounting shell.

[0007] Optionally, the mounting support also includes a handwheel fixedly mounted on the middle of the opposing screw rod, and the middle of the handwheel is a hexagonal column structure; both sides of the handwheel are attached to the inner side of the support mounting shell.

[0008] Optionally, the in-place clamping member includes two expansion columns that are slidably inserted on both sides of the support mounting shell, and the two expansion columns are respectively threadedly connected to both sides of the opposite screw rod; an extrusion shell is slidably inserted on the two expansion columns, and rubber pads are respectively provided on the sides of the two extrusion shells; the extrusion shell is used to expand and extrude to fit the inner wall of the tunnel; the ends of the two expansion columns are respectively fixedly installed with power switches, and the ends of the two power switches are respectively used to be squeezed by the inside of the extrusion shell.

[0009] Optionally, the in-place clamp also includes two return springs fixedly mounted on the ends of the two expansion columns, and the ends of the two return springs are fixedly mounted on the inner side of the extrusion shell; the two return springs are respectively located on the outside of the two power switches; the two power switches are connected in series to the power supply of the laser cutting machine.

[0010] Optionally, the adaptive cutting member includes a sleeve arm rotatably mounted on a support mounting shell; a lifting arm is slidably sleeved on the sleeve arm; a handle is provided on the sleeve arm; a compensation spring is sleeved on the inner side of the lifting arm; the end of the compensation spring is fixedly connected to the inner side of the lifting arm; the other end of the compensation spring is fixedly mounted on the inner side of the sleeve arm; a laser cutting head is fixedly mounted on the top of the lifting arm through a bracket, and the laser cutting head is externally connected to a laser cutting machine; an alarm light is fixedly mounted on the sleeve arm; the laser cutting head is used for laser cutting the inner wall of the tunnel.

[0011] Optionally, the rolling calibration component includes a rotary wheel rotatably mounted on the end of the lifting arm, and the top of the rotary wheel is higher than the laser cutting head; a marking sponge pad is fixedly mounted on the rotary wheel; the marking sponge pad is located on the outside of the rotary wheel; paint is adsorbed on the marking sponge pad; the rotary wheel is used to roll on the tunnel wall; the marking sponge pad is used for distance marking.

[0012] Optionally, the depth detection component includes a detection slider slidably mounted on the lifting arm; a slitting wheel is rotatably mounted on the detection slider, and the slitting wheel is used to roll in the slit; the slitting wheel is sharpened; the slitting wheel is aligned with the laser cutting head; a spring clip is fixedly mounted on the bottom of the detection slider, and the spring clip is a V-shaped steel sheet; the bottom of the spring clip is mounted on the lifting arm through a bracket; the spring clip is used to push the detection slider upward.

[0013] Optionally, the alarm prompt member includes an alarm detection tube slidably inserted into the bottom of the detection slider; an alarm spring is sleeved inside the alarm detection tube, and the end of the alarm spring is fixedly connected to the inside of the detection slider, and the other end of the alarm spring is connected to the inside of the alarm detection tube.

[0014] Optionally, the alarm prompt component also includes an alarm switch fixedly installed on the bottom of the alarm detection tube, and the alarm switch is electrically connected to the alarm light; a stop block is fixedly installed on the side of the lifting arm by bolts, and the stop block is aligned with the alarm switch; the alarm switch is squeezed and fits the side of the stop block.

[0015] A pre-splitting contour cutting method based on laser cutting:

[0016] 1) Manually hold the handle on the sleeve arm to drive the lifting arm to swing, driving the laser cutting head to perform laser cutting on the inner wall of the tunnel. During the process, the rotary wheel can roll on the tunnel wall;

[0017] 2) When the rotary wheel rolls, it drives the marking sponge pad to stick to the tunnel wall, applies the paint on the tunnel wall, and then drills at the corresponding position.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In the above scheme, by setting the clamping parts in place, the stability of the structure during actual laser cutting is guaranteed, the cutting safety is guaranteed, and the adaptive cutting parts are used for swing cutting to ensure that the straightness of the cutting path meets the standard. At the same time, the structure does not require manual hand-held cutting, which is safer. The adaptive cutting parts can be directly swung to operate the cutting, which is simple and fast. The power switch can be used to limit the staff to stably clamp the structure to fit both sides of the inner wall of the tunnel before the laser cutting machine can be started normally for cutting, further ensuring the actual cutting quality, reducing the shaking caused by instability, and improving the staff's operation standardization.

[0020] By setting up a rolling calibration part, it can be used to support the laser cutting head to ensure that the laser cutting head can perform cutting work normally. At the same time, the marking sponge pad can be used to mark the distance points, which can facilitate subsequent drilling at the corresponding position. By drilling on the cutting pre-crack contour line, it can not only assist in drilling positioning, but also effectively control the blasting contour, reduce the degree of over-excavation and under-excavation, and improve the subsequent blasting effect. The structure is more reasonable and can ensure the quality of subsequent blasting.

[0021] By setting up an alarm prompt component to cooperate with the depth detection component, it can roll in the cutting gap in real time. By using the cutting wheel to roll in the cutting gap, it can stabilize the laser cutting head and improve the cutting stability. It can detect the depth of the cutting gap in real time, and avoid the problem of substandard cutting depth caused by excessive cutting speed. It can remind the staff in real time, so that the staff can re-cut in time to avoid affecting the subsequent blasting quality and ensure the cutting depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the pre-splitting contour cutting device based on laser cutting;

[0024] Figure 2 It is a schematic diagram of the rear structure of the pre-splitting contour cutting device based on laser cutting;

[0025] Figure 3 A cross-sectional view of the internal structure of a pre-splitting contour cutting device based on laser cutting;

[0026] Figure 4 This is a three-dimensional enlarged structural diagram of the installation support;

[0027] Figure 5 for Figure 3 A magnified view of the structure of the middle B region;

[0028] Figure 6 It is a three-dimensional enlarged structural diagram of the adaptive cutting part;

[0029] Figure 7 This is a schematic diagram of the three-dimensional enlarged structure of the laser cutting head;

[0030] Figure 8 This is a schematic diagram of the three-dimensional enlarged structure of the depth detection component;

[0031] Figure 9 This is a three-dimensional enlarged structural diagram of the alarm prompt component;

[0032] Figure 10 Schematic diagram of the tunnel wall after laser cutting contour.

[0033] Reference numerals

[0034] 1. Mounting support; 101. Support mounting shell; 102. Opposite screw rod; 103. Handwheel; 2. Clamping part in place; 201. Expansion column; 202. Extrusion shell; 203. Power switch; 204. Reset spring; 3. Adaptive cutting part; 301. Sleeve arm; 302. Lifting arm; 303. Compensation spring; 304. Laser cutting head; 305. Alarm light; 4. Rolling calibration part; 401. Rotating wheel; 402. Marking sponge pad; 5. Depth detection part; 501. Detection slider; 502. Slit wheel; 503. Shrapnel; 6. Alarm prompt part; 601. Alarm detection tube; 602. Alarm spring; 603. Alarm switch; 604. Stop block.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0036] The following describes in detail a laser-based pre-splitting contour cutting device and method provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are optimal and preferred embodiments, and those skilled in the art may employ alternative methods for implementing known techniques. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0037] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0038] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0039] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0040] In addition, spatially relative terms can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein can similarly be interpreted accordingly.

[0041] As Figures 1 to 10 The embodiment of the present application provides a laser cutting based pre-splitting contour cutting device, which comprises a mounting support 1, a to-position clamping piece 2 is mounted on the mounting support 1 and is used for keeping cutting stable, an adaptive cutting piece 3 is mounted on the mounting support 1, the adaptive cutting piece 3 is used for cutting tunnel inner wall, a rolling calibration piece 4 is mounted on the adaptive cutting piece 3 and is used for calibrating punching position, a depth detection piece 5 is mounted on the adaptive cutting piece 3, an alarm prompting piece 6 is mounted on the depth detection piece 5, and the mounting support 1 comprises a support mounting shell 101 and an opposite screw rod 102, the opposite screw rod 102 is rotatably mounted on the support mounting shell 101, opposite threads are arranged on both sides of the opposite screw rod 102, and rectangular insertion grooves are arranged on both sides of the support mounting shell 101.

[0042] As Figures 4 to 7As shown, the mounting support 1 also includes a handwheel 103 fixedly mounted in the middle of the opposing screw rod 102, and the middle of the handwheel 103 is a hexagonal column structure; both sides of the handwheel 103 are attached to the inner side of the support mounting shell 101; the in-place clamping member 2 includes two expansion columns 201 slidably plugged into the two sides of the support mounting shell 101, and the two expansion columns 201 are respectively threadedly connected to the two sides of the opposing screw rod 102; the two expansion columns 201 are respectively slidably plugged with extrusion shells 202, and the sides of the two extrusion shells 202 are respectively provided with rubber pads; the extrusion shells 202 are used to expand and extrude to fit the inner wall of the tunnel; the ends of the two expansion columns 201 are respectively fixedly mounted with power switches 203, and the ends of the two power switches 203 are respectively used to be squeezed by the extruded shells 20 2 inner extrusion; the in-position clamping member 2 also includes two return springs 204 fixedly mounted on the ends of the two expansion columns 201, and the ends of the two return springs 204 are fixedly mounted on the inner side of the extrusion shell 202; the two return springs 204 are respectively located on the outside of the two power switches 203; the two power switches 203 are connected in series to the power supply of the laser cutting machine; the adaptive cutting member 3 includes a sleeve arm 301 rotatably mounted on the support mounting shell 101; a lifting arm 302 is slidably sleeved on the sleeve arm 301; a handle is provided on the sleeve arm 301; a compensation spring 303 is sleeved on the inner side of the lifting arm 302; the end of the compensation spring 303 is fixedly connected to the inner side of the lifting arm 302; the other end of the compensation spring 303 is fixedly mounted on the sleeve arm 3 01 inside; a laser cutting head 304 is fixedly installed on the top of the lifting arm 302 through a bracket, and the laser cutting head 304 is externally connected to a laser cutting machine; an alarm light 305 is fixedly installed on the sleeve arm 301; the laser cutting head 304 is used for laser cutting the inner wall of the tunnel; the use of the in-place clamping member 2 in conjunction with the installation support member 1 can facilitate the staff to quickly install this structure, ensure the stability of this structure during actual laser cutting, ensure cutting safety, and at the same time cooperate with the adaptive cutting member 3 to swing cutting to ensure that the straightness of the cutting path meets the standard. At the same time, this structure does not require manual hand-held cutting, which is safer. The adaptive cutting member 3 can be directly swung to operate the cutting, which is simple and quick to operate. The power switch 203 can limit the staff's need to move this structure Only after stably clamping and fitting both sides of the inner wall of the tunnel can the laser cutting machine be started normally for cutting work, further ensuring the actual cutting quality, reducing the shaking caused by instability, and improving the operational standardization of the staff. The adaptive cutting part 3 can achieve elastic expansion and contraction, improve the fit to the inner wall of the tunnel, and the structure is more reasonable. As the expansion column 201 expands, it drives the extrusion shell 202 to fit the bottom edge of the inner wall of the tunnel, and then squeezes the power switch 203. Only when the two power switches 203 are squeezed at the same time can the laser cutting machine power be connected normally. At this time, the human can manually hold the handle on the sleeve arm 301 to drive the lifting arm 302 to swing, and then drive the laser cutting head 304 to perform laser cutting work on the inner wall of the tunnel.

[0043] like Figure 6 andFigure 7 As shown, the rolling marker 4 comprises a rotating wheel 401 rotatably mounted at the end of the lifting arm 302, and the top of the rotating wheel 401 is higher than the laser cutting head 304; a marker sponge pad 402 is fixedly mounted on the rotating wheel 401; the marker sponge pad 402 is located outside the rotating wheel 401; the marker sponge pad 402 has paint adsorbed thereon; the rotating wheel 401 is used for rolling on the tunnel wall; and the marker sponge pad 402 is used for marking points at a distance. The rolling marker 4 can be used to support the laser cutting head 304, so as to ensure that the laser cutting head 304 can normally perform cutting work, and at the same time, the marker sponge pad 402 can be used to mark points at a distance, so as to facilitate subsequent drilling at the corresponding positions. By drilling on the cutting pre-cracking contour line, not only can the drilling positioning be assisted, but also the blasting contour can be effectively controlled, the degree of overbreak or underbreak is reduced, the subsequent blasting effect is improved, the structure is more reasonable, and the subsequent blasting quality can be ensured.

[0044] As shown in Figures 4 to 10 The depth detection member 5 comprises a detection sliding block 501 slidingly mounted on the lifting arm 302; a cutting seam running wheel 502 is rotatably mounted on the detection sliding block 501, and the cutting seam running wheel 502 is used for rolling in the cutting seam; the cutting seam running wheel 502 is sharpened; the cutting seam running wheel 502 is aligned with the laser cutting head 304; a spring sheet 503 is fixedly mounted at the bottom of the detection sliding block 501, and the spring sheet 503 is a V-shaped steel sheet; the spring sheet 503 is mounted on the lifting arm 302 through a support at the bottom; the spring sheet 503 is used for pushing the detection sliding block 501 to move upward; the alarm prompting member 6 comprises an alarm detection cylinder 601 slidingly inserted at the bottom of the detection sliding block 501; an alarm spring 602 is sleeved in the alarm detection cylinder 601, one end of the alarm spring 602 is fixedly connected to the inside of the detection sliding block 501, and the other end of the alarm spring 602 is connected to the inside of the alarm detection cylinder 601; the alarm prompting member 6 further comprises an alarm switch 603 fixedly mounted at the bottom of the alarm detection cylinder 601, and the alarm switch 603 is electrically connected to the alarm lamp 305; a stop block 604 is fixedly mounted on the side of the lifting arm 302 through bolts, and the stop block 604 is aligned with the alarm switch 603; the alarm switch 603 is pressed and attached to the side of the stop block 604. The alarm prompting member 6 can cooperate with the depth detection member 5 to roll in the cutting gap in real time. By rolling the cutting seam running wheel 502 in the cutting seam, on the one hand, the laser cutting head 304 can be stabilized to improve the cutting stability, and on the other hand, the depth of the cutting seam can be detected in real time, so as to avoid the problem that the cutting depth does not meet the standard due to too fast cutting speed. The staff can be prompted in real time, so as to facilitate the staff to re-cut in time, avoid affecting the subsequent blasting quality, ensure the cutting depth, and once the cutting groove is too shallow, the cutting seam running wheel 502 will move downward, the detection sliding block 501 will move downward, and the alarm switch 603 will be pressed to control the alarm lamp 305 to alarm.

[0045] A pre-splitting contour cutting method based on laser cutting:

[0046] 1) Manually hold the handle on the sleeve arm 301 to drive the lifting arm 302 to swing, driving the laser cutting head 304 to perform laser cutting on the inner wall of the tunnel. During this process, the rotary wheel 401 can roll on the tunnel wall;

[0047] 2) When the rotary wheel 401 rolls, it drives the marking sponge pad 402 to stick to the tunnel wall, coating the tunnel wall with paint, and then drilling at the corresponding position.

[0048] The working principle provided by the present invention is as follows: first, the support mounting shell 101 is placed on the ground, and then the hexagonal column of the handwheel 103 is connected by a wrench, and the opposing screw rod 102 is manually rotated to drive the two expansion columns 201 to expand outward. At this time, as the expansion column 201 expands, the extrusion shell 202 is driven to fit the bottom edge of the inner wall of the tunnel, and then the power switch 203 is squeezed. Only when the two power switches 203 are squeezed at the same time, the power of the laser cutting machine can be connected normally. At this time, the human can manually hold the handle on the sleeve arm 301 to drive the lifting arm 302 to swing, and then drive the laser cutting head 304 to perform laser cutting on the inner wall of the tunnel. Under the squeezing of the compensation spring 303, the lifting arm 302 can be driven to be pushed out in real time to adapt to the radius of the tunnel wall. During the process, the rotary wheel 401 can roll on the tunnel wall, and cooperate with the marking sponge pad 402 to The marking points at fixed distances are achieved, which can facilitate subsequent drilling at corresponding positions; when the lifting arm 302 swings and drives the laser cutting head 304 to cut, as the groove is formed, the slitting wheel 502 can be rolled and inserted into the groove. When the groove depth reaches the standard, the slitting wheel 502 is squeezed by the spring 503 and penetrates into the groove. Once the groove is too shallow, the slitting wheel 502 will move down, and the slitting wheel 502 drives the detection slider 501 to move down, which can drive the alarm switch 603 to squeeze the stop block 604 and control the alarm light 305 to give an alarm prompt. The alarm spring 602 is used to elastically support the alarm detection tube 601 to avoid jamming when the alarm detection tube 601 is squeezed. At the same time, the elastically installed alarm detection tube 601 does not affect the alarm switch 603 from being pressed when squeezing the stop block 604 because the alarm spring 602 has a large elastic force.

[0049] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pre-splitting contour cutting device based on laser cutting, comprising a mounting support, on which a position clamping member is mounted, characterized in that: The in-place clamping member is used to maintain cutting stability; the mounting support member is mounted with an adaptive cutting member; the adaptive cutting member is used to cut the inner wall of the tunnel; A rolling calibration piece is installed on the adaptive cutting piece; the rolling calibration piece is used to calibrate the punching position; A depth detection member is installed on the adaptive cutting member; An alarm prompting member is installed on the depth detection member; The mounting support comprises: a support mounting shell and a counter screw rod, wherein the counter screw rod is rotatably mounted on the support mounting shell; and opposite threads are provided on both sides of the counter screw rod; Rectangular slots are provided on both sides of the support and mounting shell.

2. The laser cutting-based pre-splitting contour cutting device according to claim 1, characterized in that The mounting support also includes a handwheel fixedly mounted in the middle of the opposing screw rod, and the middle of the handwheel is a hexagonal column structure; both sides of the handwheel are attached to the inner side of the support mounting shell.

3. The laser cutting-based pre-splitting contour cutting device according to claim 1, characterized in that The in-place clamping member includes two expansion columns that are slidably inserted on both sides of the support mounting shell, and the two expansion columns are respectively threadedly connected to both sides of the opposite screw rod; the two expansion columns are respectively slidably inserted with extrusion shells, and the sides of the two extrusion shells are respectively provided with rubber pads; the extrusion shells are used to expand and extrude to fit the inner wall of the tunnel; the ends of the two expansion columns are respectively fixedly installed with power switches, and the ends of the two power switches are respectively used to be squeezed by the inside of the extrusion shell.

4. The laser cutting-based pre-splitting contour cutting device according to claim 3, characterized in that The in-place clamp also includes two return springs fixedly mounted on the ends of the two expansion columns, and the ends of the two return springs are fixedly mounted on the inner side of the extrusion shell; the two return springs are respectively located on the outsides of the two power switches; the two power switches are connected in series to the power supply of the laser cutting machine.

5. The laser cutting-based pre-splitting contour cutting device according to claim 1, characterized in that The adaptive cutting part includes a sleeve arm rotatably mounted on a support mounting shell; a lifting arm is slidably sleeved on the sleeve arm; a handle is provided on the sleeve arm; a compensation spring is sleeved on the inner side of the lifting arm; the end of the compensation spring is fixedly connected to the inner side of the lifting arm; the other end of the compensation spring is fixedly mounted on the inner side of the sleeve arm; a laser cutting head is fixedly mounted on the top of the lifting arm through a bracket, and the laser cutting head is externally connected to a laser cutting machine; an alarm light is fixedly mounted on the sleeve arm; the laser cutting head is used for laser cutting the inner wall of the tunnel.

6. The laser cutting-based pre-splitting contour cutting device according to claim 5, characterized in that The rolling calibration component includes a rotary wheel rotatably mounted on the end of the lifting arm, and the top of the rotary wheel is higher than the laser cutting head; a marking sponge pad is fixedly mounted on the rotary wheel; the marking sponge pad is located on the outside of the rotary wheel; paint is adsorbed on the marking sponge pad; the rotary wheel is used to roll on the tunnel wall; the marking sponge pad is used to mark distances.

7. The laser cutting-based pre-splitting contour cutting device according to claim 6, characterized in that The depth detection part includes a detection slider slidably mounted on the lifting arm; a slitting wheel is rotatably mounted on the detection slider, and the slitting wheel is used to roll in the slit; the slitting wheel is sharpened; the slitting wheel is aligned with the laser cutting head; a spring clip is fixedly mounted on the bottom of the detection slider, and the spring clip is a V-shaped steel sheet; the bottom of the spring clip is mounted on the lifting arm through a bracket; the spring clip is used to push the detection slider upward.

8. The laser cutting-based pre-splitting contour cutting device according to claim 7, characterized in that The alarm prompt member includes an alarm detection tube slidably inserted into the bottom of the detection slider; an alarm spring is sleeved inside the alarm detection tube, and the end of the alarm spring is fixedly connected to the inside of the detection slider, and the other end of the alarm spring is connected to the inside of the alarm detection tube.

9. The laser cutting-based pre-splitting contour cutting device according to claim 8, characterized in that The alarm prompt component also includes an alarm switch fixedly installed at the bottom of the alarm detection tube, and the alarm switch is electrically connected to the alarm light; a stop block is fixedly installed on the side of the lifting arm by bolts, and the stop block is aligned with the alarm switch; the alarm switch is squeezed and fits the side of the stop block.

10. A pre-splitting contour cutting method based on laser cutting, using the pre-splitting contour cutting device based on laser cutting according to any one of claims 1 to 9, characterized in that: The steps include: 1) Manually hold the handle on the sleeve arm to drive the lifting arm to swing, driving the laser cutting head to perform laser cutting on the inner wall of the tunnel. During the process, the rotary wheel can roll on the tunnel wall; 2) When the rotary wheel rolls, it drives the marking sponge pad to stick to the tunnel wall, applies the paint on the tunnel wall, and then drills at the corresponding position.

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