A laser cutting machine and a control system therefor

Abstract

The present application belongs to the technical field of laser cutting device, and particularly relates to a laser cutting machine and a control system thereof, which comprises a bed body, a waste groove, a material loading table, a numerical control displacement system and a cutting head are sequentially arranged in the vertical direction of the bed body, the cutting head is used for emitting a laser beam to cut a workpiece, and the waste groove is used for receiving welding slag generated by the laser beam cutting the workpiece, and the present application further comprises a rotational flow spraying assembly and a turbulence assembly which are arranged in the waste groove at intervals; wherein the rotational flow spraying assembly comprises a rotary nozzle which is rotatably installed in the waste groove, and the turbulence assembly comprises a rotary shaft, a one-way bearing and a first blade which are sequentially connected in the vertical direction of the waste groove; wherein the rotary nozzle is used for rotatingly spraying a cooling liquid into the waste groove. In the process of cutting the workpiece by the laser beam, the cooling liquid is used to impact the welding slag at multiple angles to reduce the residual welding slag, so as to solve the problem that the removal rate of the residual welding slag is generally low.

Description

Technical Field

[0001] This invention belongs to the field of laser cutting device technology, specifically relating to a laser cutting machine and its control system. Background Technology

[0002] A laser cutting machine is an advanced processing device that uses a high-energy-density laser beam to precisely cut materials through "melting and blowing away" or direct "vaporization" under computer control. It includes a laser, beam transmission, cutting head, machine tool, CNC system, cooling system, gas cylinders and gas supply system, and a dust removal system for removing the fumes and dust generated during cutting.

[0003] When processing materials, existing laser cutting machines produce welding slag due to the high temperature of the material melting, which requires regular cleaning. Some of the welding slag adheres to the serrated support strips of the machine tool's internal worktable, while the rest falls off the serrated support strips at intervals and is collected through a waste bin.

[0004] During the cleaning of welding slag from laser cutting machines, the waste bin typically employs an open structure matched to the dimensions of the cutting head's machining surface. This design causes the liquid stream ejected from the cooling nozzles to easily disperse before reaching the bottom of the waste bin, significantly reducing the impact force on the welding slag. Therefore, this method is ineffective at removing stubborn welding slag, resulting in a generally low removal rate of residual welding slag from the waste bin. Summary of the Invention

[0005] The purpose of this invention is to provide a laser cutting machine and its control system, which can utilize the swirling flow of coolant to impact the welding slag at multiple angles during the laser beam cutting process, thereby reducing residual welding slag and solving the problem of generally low residual welding slag removal rate.

[0006] The specific technical solution adopted by this invention is as follows: A laser cutting machine includes a bed, inside which a scrap trough, a loading table, a CNC displacement system, and a cutting head are arranged vertically in sequence. The cutting head is used to emit a laser beam to cut the workpiece, and the scrap trough is used to collect the welding slag generated by the laser beam cutting the workpiece. The machine also includes: The swirling jet assembly and the turbulence assemblies are spaced apart inside the waste trough; The swirling jet assembly includes a rotating nozzle rotatably installed inside the waste trough, and the turbulence turbulence assembly includes a rotating shaft, a one-way bearing, and a first blade connected in sequence along the vertical direction of the waste trough. The rotating nozzle is used to spray coolant into the waste tank in a rotating manner, and the coolant forms a swirling flow when it comes into contact with the first blade, which can impact the welding slag in the waste tank from multiple angles, thereby reducing residual welding slag.

[0007] As an optional solution, the turbulence assembly includes a second blade and a third blade arranged at intervals, both of which are rotatably mounted on a rotating shaft via a one-way bearing; The second and third blades rotate in opposite directions when they come into contact with the coolant, causing the coolant to form swirling flows in different directions, thereby increasing the impact area of ​​the swirling flows on the weld slag.

[0008] As an alternative, an angular velocity sensor is installed inside the waste trough along the axial direction of the rotating shaft, and the angular velocity sensor is used to monitor the rotational speed data of the rotating shaft; The data includes rotational speed data and timestamps to form a turbulence state dataset. Standard rotational speed and time interval thresholds for turbulence state are set. The turbulence state dataset is compared with the standard rotational speed and time interval thresholds for turbulence state. If the comparison results show a deviation exceeding the set number of times, an alarm is triggered to indicate that the welding slag is obstructing the swirling flow.

[0009] As an optional solution, the swirling jet assembly also includes a water pump, a delivery pipe, a branch pipe, and a protective box disposed outside the waste trough. The rotating nozzle is rotatably mounted inside the protective box, and the water pump delivers coolant to the interior of the rotating nozzle through the delivery pipe and the branch pipe. The protective box is connected to the waste trough, and the rotating nozzle is vertically offset from the cutting head to prevent welding slag generated by the laser beam cutting the workpiece from adhering to the rotating nozzle.

[0010] As an optional solution, the waste tank includes a cooling chamber and a buffer chamber spaced apart inside the waste tank. A waste residue pipe that runs vertically through the buffer chamber is connected in the middle of the cooling chamber, and a solenoid valve is installed on the waste residue pipe. The cooling cavity is used to contain coolant and welding slag, and the buffer cavity is used to hold coolant and welding slag after the laser beam burns through the cooling cavity.

[0011] As an alternative, the cooling chamber is concave in the middle, and the middle of the concave part of the cooling chamber is connected to the waste residue pipe; The inclined surface at the recess of the cooling chamber is used for welding slag to slide down into the waste slag pipe.

[0012] As an optional solution, the waste tank is equipped with a modular partition assembly for separating the cooling chamber and the buffer chamber; The modular partition assembly includes a load-bearing frame, mounting holes formed on the load-bearing frame, and a pad that can be detachably installed on the mounting holes. The load-bearing frame is configured to fit the central concave shape of the cooling cavity, and the pad is used for modularization of the bottom wall of the cooling cavity.

[0013] As an alternative, the rotating shaft is rotatably mounted on the load-bearing frame at the interval of the mounting holes, and the external space of the first blade is used for replacing the pad.

[0014] As an alternative, both the buffer chamber and the first blade are made of silicon-aluminum plate, a gap is left between the buffer chamber and the rotating nozzle, and the end of the rotating shaft extends into the interior of the buffer chamber.

[0015] A control system for a laser cutting machine, used to control the laser cutting machine as described above, comprising: The parameter setting module is used by staff to input workpiece dimensions and their processing dimensions. The loading confirmation module is used by the staff to confirm the loading of the workpiece. After confirmation, the staff closes the protective door of the bed. The cutting execution module is used by the controller to call the pre-entered program and start the CNC displacement system, so that the CNC displacement system automatically moves the cutting head in the XYZ axis coordinate system, and the cutting head performs laser beam cutting on the workpiece along the specified path; The cooling module is used by the controller to activate the swirling jet assembly, which sprays coolant into the waste tank in a rotating manner, and the coolant contacts the turbulence assembly to form a swirling flow. The real-time monitoring module is used to monitor the rotational speed data of the turbulence component and convert it into an electrical signal through a signal converter and transmit it to the controller. The controller combines the rotational speed data with a timestamp to form a turbulence status dataset and sets the standard rotational speed and time interval threshold for the turbulence status. The comparison module compares the turbulence state dataset with the standard rotational speed and time interval threshold for turbulence state. If the comparison result shows a deviation exceeding the set number of times, an alarm is triggered to indicate that the welding slag is obstructing the swirling flow.

[0016] The technical effects achieved by this invention are as follows: This invention provides a laser cutting machine in which coolant is rotary-sprayed during the laser beam cutting of a workpiece, and a swirling flow is formed by unidirectional rotating blades. This swirling flow impacts the weld slag at multiple angles. Compared to the traditional unidirectional distributed coolant supply method, this method applies impact force to the weld from different angles, thereby reducing residual weld slag and solving the problem of generally low residual weld slag removal rates.

[0017] This invention provides a laser cutting machine that uses a modular partition assembly to limit the coolant during the process of impacting welding slag with coolant. When the laser beam overcuts, operators can modularly replace the damaged areas, reducing maintenance costs.

[0018] This invention provides a laser cutting machine that monitors blade rotation speed data in real time during the process of coolant impacting welding slag, and combines this data with timestamps to form a turbulence state dataset. Furthermore, a standard rotation speed and time interval threshold for turbulence state are set. The turbulence state dataset is compared with the standard rotation speed and time interval threshold. If the comparison result shows a deviation exceeding a set number of consecutive times, an alarm is triggered to indicate that welding slag is obstructing the swirling flow. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a laser cutting machine according to Embodiment 1 of the present invention; Figure 2 This is the invention Figure 1 Schematic diagram of the structure of the intermediate bed and waste trough; Figure 3 This is the invention Figure 2 Schematic diagram of the middle bed structure; Figure 4 This is the invention Figure 2 Schematic diagram of the waste trough structure; Figure 5 This is the invention Figure 4 Cross-sectional view of the waste trough; Figure 6 This is the invention Figure 5 A partial cross-sectional view of the modular partition assembly; Figure 7 This is the invention Figure 4 Schematic diagram of the structure of the vortex jet assembly; Figure 8 This is the invention Figure 6 First structural schematic diagram of the central turbulence component; Figure 9 This is the invention Figure 6 A schematic diagram of the second structure of the central turbulence component; Figure 10 This is a system block diagram of a control system for a laser cutting machine according to Embodiment 2 of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Bed frame; 2. CNC displacement system; 201. X-axis linear module; 202. Y-axis linear module; 203. Z-axis linear module; 3. Cutting head; 4. Material loading platform; 401. Frame; 402. Support bars; 5. Waste trough; 501. Cooling chamber; 502. Buffer chamber; 503. Waste residue pipe; 504. Solenoid valve; 6. Modular partition assembly; 601. Load-bearing frame; 602. Mounting holes; 603. Pad; 7. Swirl jet assembly; 701. Water pump; 702. Delivery pipe; 703. Branch pipe; 704. Rotary nozzle; 705. Protective box; 8. Spoiler assembly; 801. Rotating shaft; 802. One-way bearing; 803. First blade; 804. Second blade; 805. Third blade; 9. Angular velocity sensor. Detailed Implementation

[0021] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention. Example 1

[0022] like Figures 1-9 As shown, a laser cutting machine includes a bed 1. Inside the bed 1, a waste trough 5, a loading table 4, a CNC displacement system 2, and a cutting head 3 are arranged vertically in sequence. For example, the CNC displacement system 2 and the cutting head 3 are controlled by a FANUC series controller. During operation, the operator places the workpiece on the loading table 4 and operates the controller to input the program. Under the action of the program, the controller controls the CNC displacement system 2 to automatically move the cutting head 3. The cutting head 3, which uses FiberLight 1μm precision, is used to emit a laser beam to cut the workpiece. The waste trough 5 is used to collect the welding slag generated by the laser beam cutting the workpiece. Meanwhile, the waste tank 5 is equipped with a swirling jet assembly 7 and a turbulence assembly 8 at intervals. The swirling jet assembly 7 adopts an external coolant supply scheme, which can spray coolant into the waste tank 5 during the laser beam cutting process to cool the welding slag. During operation, the swirling jet assembly 7 is used to spray coolant into the waste tank 5 in a rotating manner. The direction of the coolant jet changes with the swirling jet assembly 7, radiating the entire waste tank 5. When the coolant comes into contact with the first blade 803 of the turbulence assembly 8, a swirling flow is formed, which can impact the welding slag in the waste tank 5 at multiple angles to promote the removal of welding slag and thus reduce residual welding slag.

[0023] See attached document Figure 1 , Figure 2 and Figure 3 The CNC displacement system 2 includes an X-axis linear module 201, a Y-axis linear module 202, and a Z-axis linear module 203. For example, a KK130 linear guide rail is used. During installation, the Z-axis linear module 203 is installed on the top of the loading platform 4 using bolt and nut kits. The X-axis linear module 201 is installed on the Z-axis linear module 203 via a first slide block. The Y-axis linear module 202 is installed on one side of the X-axis linear module 201 via a second slide block. During operation, under the program control of the controller, the X-axis linear module 201, Y-axis linear module 202 and Z-axis linear module 203 automatically move the cutting head 3 in the XYZ axis coordinate system, so that the cutting head 3 performs laser beam cutting on the workpiece along the specified path.

[0024] See attached document Figure 2 and Figure 3 The loading platform 4 includes a frame 401 and support bars 402 welded inside the frame 401. When loading, the operator places the workpiece flat on the top of the support bar 402, so that the welding slag generated by the laser beam cutting the workpiece can fall along the intervals of the support bar 402 and fall into the coolant for cooling.

[0025] See attached document Figure 4 and Figure 5 The waste tank 5 includes a cooling chamber 501 and a buffer chamber 502 spaced apart inside the waste tank 5. A waste slag pipe 503 is connected in the middle of the cooling chamber 501 and runs vertically through the buffer chamber 502. During operation, the swirling jet assembly 7 sprays coolant into the cooling chamber 501. The cooling chamber 501 is used to contain the coolant and welding slag, so that the coolant can complete the cooling and solidification of the welding slag in the cooling chamber 501. The buffer chamber 502 serves as a protective layer below and is used to hold the coolant and welding slag after the laser beam burns through the cooling chamber 501. During slag discharge, a solenoid valve 504 electrically connected to the controller is installed on the waste slag pipe 503, for example, through an electrical connection via a wire. When the solenoid valve 504 is opened, the waste slag pipe 503 discharges coolant carrying welding slag, and the welding slag is separated and collected through a screen.

[0026] See attached document Figure 4 and Figure 5 The cooling chamber 501 is concave in the middle. The middle of the concave part of the cooling chamber 501 is connected to the waste slag pipe 503 through a joint. The inclined surface of the concave part of the cooling chamber 501 is used for the welding slag to slide down into the waste slag pipe 503, thereby improving the speed of centralized recycling of the welding slag after cooling.

[0027] See attached document Figure 4 , Figure 5 and Figure 6 The waste tank 5 is equipped with a modular partition assembly 6 for separating the cooling chamber 501 and the buffer chamber 502, so that the coolant flows in the cooling chamber 501 while the buffer chamber 502 is kept dry and is only used in an emergency when the laser beam burns through the cooling chamber 501. The modular partition assembly 6 includes a load-bearing frame 601, mounting holes 602 formed on the load-bearing frame 601, and a pad 603 that can be detachably installed on the mounting holes 602. During installation, the load-bearing frame 601 is installed inside the cooling chamber 501 by welding or by fixing with bolt and nut kits. The mounting holes 602 and the pad 603 are locked and fixed by bolt and nut kits or by welding strips. During operation, the load-bearing frame 601 is configured to fit the central concave shape of the cooling chamber 501, which facilitates the sliding of welding slag along the inclined load-bearing frame 601 until it enters the waste slag pipe 503. The pad 603 is used for modularization of the bottom wall of the cooling chamber 501. When the laser beam overcuts, the operator only needs to replace the pad 603 at the corresponding position, without scrapping the entire modular partition assembly 6, which can reduce the maintenance cost of the modular partition assembly 6.

[0028] See attached document Figure 4 and Figure 7 The vortex jet assembly 7 also includes a water pump 701, a delivery pipe 702, a branch pipe 703, a rotary nozzle 704, and a protective box 705, all located outside the waste tank 5. During installation, the operator rotates the rotary nozzle 704 into the protective box 705 via a sealed bearing. The water pump 701 delivers coolant into the rotary nozzle 704 through the delivery pipe 702 and the branch pipe 703. When cutting the workpiece, the protective box 705 is connected to the waste tank 5. The controller controls the water pump 701 to start, drawing in external coolant and delivering coolant to the inside of the rotary nozzle 704 along the delivery pipe 702 and the branch pipe 703, so that the rotary nozzle 704 sprays coolant in a rotating manner. The rotary nozzle 704 is vertically offset from the cutting head 3 to prevent the welding slag generated by the laser beam cutting the workpiece from adhering to the rotary nozzle 704.

[0029] See attached document Figure 5 , Figure 6 and Figure 8 The turbulence assembly 8 includes a rotating shaft 801, a one-way bearing 802 and a first blade 803 connected in sequence vertically along the waste trough 5. During installation, the rotating shaft 801 is rotatably mounted inside the cooling chamber 501 through a sealed bearing, and the first blade 803 is rotatably mounted on the rotating shaft 801 through a one-way bearing 802. When cutting the workpiece, the rotating nozzle 704 is used to spray coolant into the waste tank 5 in a rotating manner, and when the coolant comes into contact with the first blade 803 of the turbulence assembly 8, a swirling flow is formed, which can impact the welding slag in the waste tank 5 from multiple angles. Compared with the traditional unidirectional distributed supply of coolant, it can apply impact force to the welding from different angles, thereby reducing residual welding slag.

[0030] See attached document Figure 5 , Figure 6 and Figure 9The first blade 803 of the turbulence assembly 8 can be replaced by the second blade 804 and the third blade 805. During installation, the second blade 804 and the third blade 805 are both rotated on the rotating shaft 801 at intervals via the one-way bearing 802. When cutting the workpiece, the second blade 804 and the third blade 805 rotate in opposite directions when they come into contact with the coolant, so that the coolant forms swirling flows in different directions, thereby increasing the impact area of ​​the swirling flow on the weld slag and further improving the efficiency of weld slag removal.

[0031] Specifically, the second blade 804 and the third blade 805 are configured in no fewer than two sets, and each set of the second blade 804 and the third blade 805 promotes the formation of swirl along the rotation direction of the one-way bearing 802.

[0032] As an optional embodiment, the rotating shaft 801 is rotatably mounted on the load-bearing frame 601 at the interval of the mounting hole 602, and the external space of the first blade 803 is used to replace the pad 603 to avoid hindering the replacement of the pad 603.

[0033] As an optional embodiment, both the buffer cavity 502 and the first blade 803 are made of silicon-aluminum plate material, which can resist the damage of overcut laser beam. A gap is left between the buffer cavity 502 and the rotating nozzle 704, so that the coolant flow sprayed by the rotating nozzle 704 flows parallel to the modular partition assembly 6, so as to concentrate the impact force on the welding slag. The end of the rotating shaft 801 extends into the interior of the buffer cavity 502 to increase the support area of ​​the rotating shaft 801 and improve its robustness.

[0034] See attached document Figure 6 , Figure 8 and Figure 9 Inside the waste trough 5, a TQ-3507 model angular velocity sensor 9 is installed along the axial direction of the rotating shaft 801 by screws. The angular velocity sensor 9 is used to monitor the rotational speed data of the rotating shaft 801 and converts it into an electrical signal through a signal converter and transmits it to the controller. During operation, the rotation speed data and timestamp are combined to form a turbulence state dataset, and the standard rotation speed and time interval threshold for the turbulence state are set. Since the speed and flow rate of the swirling flow are within the set range, if there is no welding slag obstruction, the rotation speed data and rotation time of the rotating shaft 801 under the action of the swirling flow can be within the range of the standard rotation speed and time interval threshold for the turbulence state. At the same time, the controller compares the turbulence status dataset with the standard rotation speed and time interval threshold for turbulence status. If the comparison result shows a deviation exceeding the set number of times, such as 10 times / minute, an alarm will be triggered to indicate that the welding slag is obstructing the swirling flow. The operator needs to stop the machine in time to clean the welding slag to prevent blockage and ensure the smoothness of the turbulence.

[0035] As an optional embodiment, different pins of the controller are electrically connected to the X-axis linear module 201, the Y-axis linear module 202, the Z-axis linear module 203, the solenoid valve 504, the water pump 701, and the angular velocity sensor 9, respectively. Example 2

[0036] like Figure 10 As shown, a control system for a laser cutting machine uses a controller to control the laser cutting machine provided in Embodiment 1, and further includes components electrically connected to the controller: The parameter setting module is used by the staff to input the workpiece size and its processing size. The controller automatically generates the cutting head 3 travel path based on the workpiece size and its processing size. The loading confirmation module is used by the staff to confirm the loading of the workpiece. After confirmation, the staff closes the protective door of bed 1. The cutting execution module is used by the controller to call the pre-entered program and start the CNC displacement system 2, so that the CNC displacement system 2 automatically moves the cutting head 3 in the XYZ axis coordinate system, so that the cutting head 3 performs laser beam cutting on the workpiece along the specified path; The cooling module is used by the controller to start the water pump 701, which draws external coolant and delivers it to the inside of the rotary nozzle 704 along the delivery pipe 702 and the branch pipe 703, so that the rotary nozzle 704 sprays the coolant in a rotating manner, and the coolant contacts the turbulence component 8 to form a swirling flow. Among them, the rotating nozzle 704 is vertically staggered from the cutting head 3 to prevent welding slag generated by the laser beam cutting the workpiece from adhering to the rotating nozzle 704; The real-time monitoring module is used to call the angular velocity sensor 9 to monitor the rotational speed data of the rotating shaft 801, and convert it into an electrical signal through a signal converter and transmit it to the controller. The controller combines the rotational speed data with the timestamp to form a turbulence state dataset, and sets the standard rotational speed and time interval threshold for the turbulence state. Since the speed and flow rate of the swirling flow are within the set range, if there is no welding slag obstruction, the rotation speed and rotation time of the rotating shaft 801 under the action of the swirling flow can be within the standard speed and time interval threshold range of the turbulent state. The comparison module compares the turbulence state dataset with the standard rotational speed and time interval threshold for turbulence state. If the comparison result shows a deviation exceeding the set number of times, such as 10 times / minute, an alarm is triggered to indicate that welding slag is obstructing the swirling flow. The operator needs to stop the machine in time to clean the welding slag to prevent blockage and ensure the smoothness of the turbulence.

[0037] The above description is merely an optional embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A laser cutting machine, comprising a bed (1), wherein a scrap trough (5), a loading table (4), a CNC displacement system (2), and a cutting head (3) are arranged sequentially along the vertical direction inside the bed (1), the cutting head (3) being used to emit a laser beam to cut a workpiece, and the scrap trough (5) being used to collect welding slag generated by the laser beam cutting the workpiece, characterized in that, Also includes: The swirling jet assembly (7) and the turbulence assembly (8) are spaced apart inside the waste tank (5); The swirling jet assembly (7) includes a rotating nozzle (704) rotatably installed inside the waste tank (5), and the turbulence assembly (8) includes a rotating shaft (801), a one-way bearing (802), and a first blade (803) connected vertically along the waste tank (5). The rotating nozzle (704) is used to spray coolant into the waste tank (5) in a rotating manner, and the coolant forms a vortex when it comes into contact with the first blade (803), which can impact the welding slag in the waste tank (5) from multiple angles, thereby reducing residual welding slag.

2. The laser cutting machine according to claim 1, characterized in that: The turbulence assembly (8) includes a second blade (804) and a third blade (805) arranged at intervals. The second blade (804) and the third blade (805) are rotatably mounted on a rotating shaft (801) via a one-way bearing (802). When the second blade (804) and the third blade (805) come into contact with the coolant, they rotate in opposite directions, causing the coolant to form swirling flows in different directions, thereby increasing the impact area of ​​the swirling flow on the weld slag.

3. A laser cutting machine according to claim 1, characterized in that: An angular velocity sensor (9) is installed inside the waste tank (5) along the axial direction of the rotating shaft (801). The angular velocity sensor (9) is used to monitor the rotational speed data of the rotating shaft (801). The data includes rotational speed data and timestamps to form a turbulence state dataset. Standard rotational speed and time interval thresholds for turbulence state are set. The turbulence state dataset is compared with the standard rotational speed and time interval thresholds for turbulence state. If the comparison results show a deviation exceeding the set number of times, an alarm is triggered to indicate that the welding slag is obstructing the swirling flow.

4. A laser cutting machine according to claim 1, characterized in that: The swirling jet assembly (7) also includes a water pump (701), a delivery pipe (702), a branch pipe (703), and a protective box (705) disposed outside the waste tank (5). The rotating nozzle (704) is rotatably installed inside the protective box (705). The water pump (701) delivers coolant to the rotating nozzle (704) through the delivery pipe (702) and the branch pipe (703). The protective box (705) is connected to the waste tank (5), and the rotating nozzle (704) is vertically offset from the cutting head (3) to prevent the welding slag generated by the laser beam cutting the workpiece from adhering to the rotating nozzle (704).

5. A laser cutting machine according to claim 1, characterized in that: The waste tank (5) includes a cooling chamber (501) and a buffer chamber (502) spaced apart inside the waste tank (5). A waste slag pipe (503) is connected in the middle of the cooling chamber (501) and runs vertically through the buffer chamber (502). A solenoid valve (504) is installed on the waste slag pipe (503). The cooling cavity (501) is used to contain coolant and welding slag, and the buffer cavity (502) is used to hold coolant and welding slag after the laser beam burns through the cooling cavity (501).

6. A laser cutting machine according to claim 5, characterized in that: The cooling chamber (501) is concave in the middle, and the middle of the concave part of the cooling chamber (501) is connected to the waste pipe (503). The inclined surface of the recessed part of the cooling cavity (501) is used for the welding slag to slide down into the waste slag pipe (503).

7. A laser cutting machine according to claim 5, characterized in that: The waste tank (5) is provided with a modular partition assembly (6) for separating the cooling chamber (501) and the buffer chamber (502). The modular partition assembly (6) includes a load-bearing frame (601), mounting holes (602) opened on the load-bearing frame (601), and a pad (603) that can be detachably installed on the mounting holes (602). The load-bearing frame (601) is configured to fit the central concave shape of the cooling cavity (501), and the pad (603) is used for the modularization of the bottom wall of the cooling cavity (501).

8. A laser cutting machine according to claim 7, characterized in that: The rotating shaft (801) is rotatably mounted on the load-bearing frame (601) at the interval of the mounting hole (602), and the external space of the first blade (803) is used to replace the pad (603).

9. A laser cutting machine according to claim 5, characterized in that: Both the buffer chamber (502) and the first blade (803) are made of silicon aluminum plate. There is a gap between the buffer chamber (502) and the rotating nozzle (704). The end of the rotating shaft (801) extends into the interior of the buffer chamber (502).

10. A control system for a laser cutting machine, used to control the laser cutting machine as described in any one of claims 1-9, characterized in that, include: The parameter setting module is used by staff to input workpiece dimensions and their processing dimensions. The loading confirmation module is used by the staff to confirm the loading of the workpiece. After confirmation, the staff closes the protective door of the bed (1). The cutting execution module is used by the controller to call the pre-entered program and start the CNC displacement system (2), so that the CNC displacement system (2) automatically moves the cutting head (3) in the XYZ axis coordinate system, so that the cutting head (3) performs laser beam cutting on the workpiece along the specified path; The cooling module is used by the controller to start the swirling jet assembly (7), which sprays coolant into the waste tank (5) in a rotating manner, and the coolant contacts the turbulence assembly (8) to form a swirling flow; The real-time monitoring module is used to monitor the rotational speed data of the turbulence component (8) and convert it into an electrical signal through a signal converter and transmit it to the controller. The controller combines the rotational speed data with the timestamp to form a turbulence state dataset and sets the standard rotational speed and time interval threshold for the turbulence state. The comparison module compares the turbulence state dataset with the standard rotational speed and time interval threshold for turbulence state. If the comparison result shows a deviation exceeding the set number of times, an alarm is triggered to indicate that the welding slag is obstructing the swirling flow.

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