A fiber laser pipe cutting machine

Abstract

The application discloses a kind of optical fiber laser pipe cutting machine, it is related to laser pipe cutting machine technical field, including bed body, the bed body upper side one end is erected with fixed frame, front chuck mechanism is arranged on the fixed frame, rear chuck mechanism is movably arranged on the bed body upper side other end, laser cutting mechanism is installed on the front chuck mechanism, the front chuck mechanism with the rear chuck mechanism are used to clamp pipe fitting, the front chuck mechanism discharge side is provided with blanking mechanism, the blanking mechanism includes receiving hopper, the receiving hopper is overall funnel type conical hopper structure of upper wide and narrow, window is opened in the receiving hopper upper end two sides, suction plate is installed on the window, dust extraction bin is set on the receiving hopper upper side cooperation window, dust extraction bin is connected with interface pipe, processing module is connected with the interface pipe.The application realizes high-temperature flue gas rapid cooling, eliminates the risk of spark explosion, improves the safety of dust removal system.

Description

Technical Field

[0001] This invention relates to the field of laser tube cutting machine technology, specifically to a fiber laser tube cutting machine. Background Technology

[0002] Fiber laser pipe cutting machines are specialized processing equipment that uses fiber lasers as a light source to cut, drill holes, cut arc edges, and perform irregular contour cutting on metal pipes. They are widely used in pipe cutting in industries such as engineering machinery, fitness equipment, steel structures, and hardware fittings. Current fiber laser pipe cutting machines mainly consist of a main machine bed, front and rear chucks, a laser cutting head, a slag removal assembly, and a material unloading and receiving structure. During processing, the chucks hold the pipe and rotate it for feeding, while the cutting head performs laser ablation cutting. After cutting, the finished pipe and cutting waste are unloaded and collected by the material unloading structure.

[0003] Current fiber laser tube cutting machines still have shortcomings in practical use. After the tube is cut, the finished tube falls directly onto the unloading rack, where it impacts the rigid support, easily causing deformation and surface scratches at the tube ends. For thin-walled or high-precision tubes, this impact damage directly leads to workpiece scrap and reduced product yield. Simultaneously, the cutting process generates high-temperature metal powder fumes, which conventional tube cutting machines lack effective handling methods. Summary of the Invention

[0004] The purpose of this invention is to provide a fiber laser tube cutting machine to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fiber laser tube cutting machine, including a bed, a fixed frame is mounted on one upper end of the bed, a front chuck mechanism is mounted on the fixed frame, a rear chuck mechanism is movably mounted on the other upper end of the bed, a laser cutting mechanism is mounted on the front chuck mechanism, the front chuck mechanism and the rear chuck mechanism are used to clamp the tube, a feeding mechanism is provided on the discharge side of the front chuck mechanism, the feeding mechanism includes a receiving hopper, the receiving hopper is a funnel-shaped cone structure that is wider at the top and narrower at the bottom, windows are opened on both sides of the upper end of the receiving hopper, exhaust plates are mounted on the windows, a dust extraction chamber is provided on the upper side of the receiving hopper in conjunction with the windows, the dust extraction chamber is connected to an interface pipe, the interface pipe is connected to a processing module for treating the dust-laden airflow.

[0006] According to the above technical solution, the dust extraction chamber is divided into a cooling chamber and a heat exchange chamber. The cooling chamber and the heat exchange chamber are separated by a partition. The interface pipe is connected to the cooling chamber. The heat exchange chamber is connected to a converter module for introducing heat exchange liquid into the heat exchange chamber.

[0007] According to the above technical solution, the window includes a near window and a far window, wherein the near window is close to the interface pipe and the far window is far from the interface pipe. A cooling plate is provided in the cooling chamber corresponding to the near window, and a partition block is connected to the side of the cooling plate facing the interface pipe. The partition block is arranged at the axial position of the interface pipe.

[0008] According to the above technical solution, the partition block divides the cooling chamber into a near flow channel and a far flow channel. The near flow channel is set as an airflow channel from the near window to the interface pipe, and the far flow channel is set as an airflow channel from the far window to the interface pipe. An impact block is set in the near flow channel. The impact block is connected to the end of the cooling plate and forms an inclination angle with the surface of the cooling plate. Several cooling platforms are arranged at intervals along the airflow direction in the far flow channel. The windward side of the cooling platform is set at an angle.

[0009] According to the above technical solution, the cooling plate and cooling platform have a through cavity running vertically through them. The lower side of the cavity is connected to the heat exchange chamber, and the upper side of the cavity is connected to a manifold. The output end of the manifold is connected to the converter module. The output end of the manifold and the input end of the heat exchange chamber are respectively connected to the converter module through liquid pumps. The converter module has a built-in refrigeration module.

[0010] According to the above technical solution, the exhaust plate is set as a hollow screen plate with multiple sets of long waist-shaped slag leakage holes, the hole width is set to 8-12mm, and the hole length is set to 40-60mm.

[0011] According to the above technical solution, a support frame is fixed on the other side of the receiving hopper, and an mounting seat is provided on the lower side of the support frame. The mounting seat is fixed on the bed, and a first cylinder is hinged on the mounting seat. A tension rod is hinged to the drive end of the first cylinder. One end of the tension rod is hinged to the bed, and the other end of the tension rod is hinged to a material support frame. A set of limit frames is provided on the upper side of the bed in conjunction with the material support frame.

[0012] According to the above technical solution, a waste trough is provided at the lower opening of the receiving hopper to collect the molten slag falling from above. A dust cover is provided on the upper sliding frame of the material support frame, and a slide rail is provided on the upper side of the bed to cooperate with the dust cover. Before and after cutting, the dust cover can be manually slid to cover the cutting area, effectively preventing dust and smoke from overflowing.

[0013] According to the above technical solution, the first slide rail is set on the fixed frame, the first slide bracket is slidably mounted on the first slide rail, the first rotating shaft is rotatably set in the middle of the first slide rail, one end of the first rotating shaft is connected to the first driver, and the first rotating shaft is connected to the first slide bracket in a transmission connection.

[0014] According to the above technical solution, the laser cutting mechanism includes a lifting module, which is installed on the first carriage, and a laser cutting head is installed on the drive end of the lifting module.

[0015] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention, by setting a layered cooling structure in the dust extraction chamber of the receiving hopper and using low-temperature coolant to circulate in the heat exchange chamber, continuously maintains the low temperature of the cooling plates and multiple sets of inclined cooling platforms. The high-temperature dust-laden flue gas generated during cutting enters the cooling chamber through two paths, near and far windows. The near flow channel relies on impact blocks to change the airflow direction and extend the heat exchange time, while the far flow channel uses multiple sets of spaced cooling platforms to lengthen the airflow path. The high-temperature flue gas fully exchanges heat with the low-temperature metal wall surface and cools down rapidly, which can completely eliminate molten metal sparks carried in the flue gas, and prevent dust from being ignited by high-temperature sparks in the downstream cyclone separator and cartridge filter, greatly improving the operational safety of the entire dust removal module.

[0016] By installing dual windows (near and far windows) at the top of the receiving hopper, along with a perforated exhaust plate, dust and fumes escaping from both near and far of the material feeding area can be simultaneously extracted. A partition block divides the cooling chamber into two independent airflow channels, allowing for targeted cooling of the two streams of fumes, preventing insufficient extraction of the far-end airflow and the accumulation and overflow of dust. Simultaneously, the exhaust plate features elongated, waist-shaped slag-leaking holes, allowing large volumes of molten metal slag to fall directly into the waste trough below for centralized collection, preventing large pieces of waste slag from entering the air duct and causing blockages, thus ensuring long-term stable dust collection performance. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the laser tube cutting machine of the present invention; Figure 2 This is a schematic diagram of the feeding mechanism of the present invention; Figure 3 This is a schematic diagram of the driving structure of the material support frame of the present invention; Figure 4 This is a partial cross-sectional view of the feeding mechanism of the present invention; Figure 5 This is a longitudinal sectional view of the receiving hopper of the present invention; Figure 6 This is a cross-sectional view of the receiving hopper of the present invention; Figure 7 This is a schematic diagram of the flow state of the coolant in this invention; Figure 8 This is a schematic diagram of the laser cutting mechanism of the present invention.

[0018] In the diagram: 1. Bed; 11. Fixing frame; 2. Front chuck mechanism; 21. First slide rail; 22. First carriage; 23. First rotating shaft; 24. First driver; 3. Rear chuck mechanism; 4. Laser cutting mechanism; 41. Lifting module; 42. Laser cutting head; 5. Pipe fitting; 6. Unloading mechanism; 61. Receiving hopper; 611. Window; 6111. Near window; 6112. Far window; 612. Exhaust panel; 62. Drainage... Dust bin; 621, interface pipe; 622, cooling chamber; 623, heat exchange chamber; 624, cooling plate; 6241, partition block; 625, impact block; 626, cooling platform; 627, manifold; 63, partition plate; 64, support frame; 641, mounting base; 65, first cylinder; 66, tension rod; 67, material support frame; 68, limit frame; 69, waste trough; 7, converter module; 71, liquid pump; 8, dust cover. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8 The present invention provides a technical solution: a fiber laser tube cutting machine, including a bed 1, a fixed frame 11 mounted on one end of the upper side of the bed 1, a front chuck mechanism 2 mounted on the fixed frame 11, a rear chuck mechanism 3 movably mounted on the other end of the upper side of the bed 1, a laser cutting mechanism 4 mounted on the front chuck mechanism 2, the front chuck mechanism 2 and the rear chuck mechanism 3 used to clamp tubes 5, a feeding mechanism 6 provided on the discharge side of the front chuck mechanism 2, the feeding mechanism 6 including a receiving hopper 61, the receiving hopper 61 is a funnel-shaped conical structure that is wider at the top and narrower at the bottom, windows 611 are opened on both sides of the upper end of the receiving hopper 61, a ventilation plate 612 is mounted on the window 611, a dust extraction chamber 62 is provided on the upper side of the receiving hopper 61 in conjunction with the window 611, the dust extraction chamber 62 is connected to an interface pipe 621, the interface pipe 621 is connected to a processing module for processing dust-laden airflow.

[0021] The dust extraction chamber 62 is divided into a cooling chamber 622 and a heat exchange chamber 623. The cooling chamber 622 and the heat exchange chamber 623 are separated by a partition 63. The interface pipe 621 is connected to the cooling chamber 622. The heat exchange chamber 623 is connected to a heat exchange module 7, which is used to introduce heat exchange liquid into the heat exchange chamber 623.

[0022] Window 611 includes a near window 6111 and a far window 6112, wherein the near window 6111 is close to the interface pipe 621 and the far window 6112 is far from the interface pipe 621. A cooling plate 624 is provided in the cooling chamber 622 corresponding to the near window 6111. A partition block 6241 is connected to the side of the cooling plate 624 facing the interface pipe 621. The partition block 6241 is arranged at the axial position of the interface pipe 621.

[0023] Furthermore, the partition block 6241 divides the cooling chamber 622 into a near flow channel and a far flow channel. The near flow channel is configured as an airflow passage from the near window 6111 to the interface pipe 621, and the far flow channel is configured as an airflow passage from the far window 6112 to the interface pipe 621. An impact block 625 is provided in the near flow channel. The impact block 625 is connected to the end of the cooling plate 624 and forms an angle with the surface of the cooling plate 624. Several cooling platforms 626 are arranged at intervals along the airflow direction in the far flow channel. The windward side of the cooling platform 626 is inclined.

[0024] Furthermore, the cooling plate 624 and the cooling platform 626 have a through cavity running vertically through them. The lower side of the cavity is connected to the heat exchange chamber 623, and the upper side of the cavity is connected to the manifold 627. The output end of the manifold 627 is connected to the converter module 7. The output end of the manifold 627 and the input end of the heat exchange chamber 623 are respectively connected to the converter module 7 through the liquid pump 71. The converter module 7 has a built-in refrigeration module.

[0025] It should be further explained that the windward side of the cooling platform 626 is inclined, facing the dust-laden airflow entering through the far window 6112. The cooling platform 626 body is in contact with the heat exchange chamber 623, and can receive the cooling capacity conducted by the heat exchange liquid inside the heat exchange chamber 623. The impact block 625 and the cooling plate 624 form an angle, changing the direction of the near-flow channel airflow, extending the residence time of the near-flow channel airflow, and improving the heat exchange cooling efficiency. Both the cooling plate 624 and the cooling platform 626 are used to cool the high-temperature dust-laden airflow and prevent sparks from being generated during the recovery process. The refrigeration module is used to control the coolant temperature within a certain range. The coolant is input into the heat exchange chamber 623 through the liquid pump 71, and then enters from the underside of the cooling plate 624 and the cooling platform 626, flows out from bottom to top into the confluence chamber 627, and is then transported back to the converter module 7. The converter module 7 adjusts the coolant temperature back to the set temperature range. As the coolant passes through the cooling plate 624 and cooling platform 626, its surface temperature is simultaneously adjusted, ensuring effective cooling of the airflow upon contact with their surfaces. The cooling plate 624 and cooling platform 626 continuously cool through the heat exchange liquid in the heat exchange chamber 623. High-temperature flue gas contacts the low-temperature cooling platform 626 wall for heat exchange and cooling, reducing the overall airflow temperature. Multiple cooling platforms 626 are arranged at intervals, extending the airflow path within the far channel and ensuring sufficient cooling of the high-temperature flue gas drawn in through the far window 6112, which is far from the interface pipe 621.

[0026] Optionally, the refrigeration module may be, but is not limited to, a small, stand-alone integrated refrigeration module, mainly comprising a refrigeration main unit, a temperature control unit, a safety protection unit, and auxiliary components. The refrigeration main unit includes a fully enclosed scroll compressor, a finned air-cooled condenser, and a plate evaporator. For example, the liquid pump 71 delivers 8°C low-temperature ethylene glycol coolant into the heat exchange chamber 623. The coolant flows upward through the cooling plate 624 and cooling platform 626 cavities, absorbing heat and rising to 13-16°C, before flowing back to the manifold 627 and into the plate evaporator of the refrigeration module. The compressor compresses the high-temperature refrigerant, which is then cooled by the air-cooled condenser. The low-temperature liquid refrigerant exchanges heat with the high-temperature ethylene glycol in the evaporator, cooling the coolant back to the set 8°C, completing the closed-loop cycle.

[0027] The exhaust plate 612 is set as a hollow screen plate with multiple sets of elongated slag leakage holes. Preferably, the hole width (short side) is set to 8-12mm and the hole length (long side) is set to 40-60mm.

[0028] In one embodiment, the processing module includes a cyclone separator, a cartridge filter, and a fan; the cyclone separator is used for coarse dust removal, relying on inertia to separate large metal slag particles in the airflow; the cartridge filter is used for fine filtration, preferably using an anti-static, flame-retardant cartridge filter, to remove micron-sized fine metal dust; and the fan is used to discharge the purified airflow to the outside.

[0029] A support frame 64 is fixed on the other side of the receiving hopper 61. A mounting base 641 is provided on the lower side of the support frame 64. The mounting base 641 is fixed on the bed 1. A first cylinder 65 is hinged to the mounting base 641. A tension rod 66 is hinged to the drive end of the first cylinder 65. One end of the tension rod 66 is hinged to the bed 1. The other end of the tension rod 66 is hinged to a material support frame 67. A set of limit frames 68 is provided on the upper side of the bed 1 in conjunction with the material support frame 67.

[0030] In actual operation, the cut pipe fitting 5 falls onto the support frame 67 in a horizontal receiving position. The limiting frame 68 axially limits the pipe fitting 5 to prevent it from moving. During unloading, the first cylinder 65 retracts, driving the tension rod 66 to tilt the support frame 67 downwards. The pipe fitting 5 slides down the slope of the support frame 67 under its own weight into the externally connected collection box. The dust and fumes generated during unloading enter the dust extraction chamber 62 for treatment via the exhaust plate 612. After unloading is completed, the first cylinder 65 extends, and the tension rod 66 lifts the support frame 67 back to the receiving position, ready to receive the next pipe fitting 5.

[0031] Preferably, a waste trough 69 is provided at the lower opening of the receiving hopper 61 to collect the molten slag falling from above. A dust cover 8 is provided on the upper sliding frame of the material support frame 67. A slide rail is provided on the upper side of the bed 1 in conjunction with the dust cover 8. Before and after cutting, the dust cover 8 can be manually slid to cover the cutting area, effectively preventing dust and smoke from overflowing.

[0032] The fixed frame 11 is provided with a first slide rail 21, and a first slide 22 is slidably mounted on the first slide rail 21. A first rotating shaft 23 is rotatably provided in the middle of the first slide rail 21. One end of the first rotating shaft 23 is connected to a first driver 24, and the first rotating shaft 23 is connected to the first slide 22 in a transmission connection.

[0033] The laser cutting mechanism 4 includes a lifting module 41, which is mounted on the first carriage 22. The driving end of the lifting module 41 is equipped with a laser cutting head 42.

[0034] In actual operation, the first driver 24 drives the first carriage 22 to move along the first slide rail 21, and the lifting module 41 drives the laser cutting head 42 to lift up and down, which, together with the front chuck mechanism 2, clamps the pipes 5 of different specifications to complete the cutting operation.

[0035] It should be noted that the front chuck mechanism 2 is used to clamp the front end of the pipe fitting 5 and can drive the pipe fitting 5 to rotate, thus cooperating with the laser cutting mechanism 4 to complete the cutting of the pipe fitting 5; the rear chuck mechanism 3 is slidably set on the guide rail of the bed 1 and can move along the length of the bed 1. It is used to clamp the rear end of the pipe fitting 5 and can follow the pipe fitting 5 to feed. It cooperates with the front chuck mechanism 2 to position and clamp the pipe fitting 5, thus realizing the rotational feeding of the pipe fitting 5.

[0036] The specific dust removal methods are as follows: Step 1: Cutting and Dust Collection Pre-Sealing. The long pipe 5 is clamped and positioned by the front chuck mechanism 2 and the rear chuck mechanism 3 on the bed 1 and rotated. The laser cutting head 42 of the laser cutting mechanism 4 moves down to complete the pipe cutting operation. Before cutting, the dust cover 8 is manually slid along the bed slide rail to seal the laser cutting area and prevent the instantaneous high temperature smoke and slag from spreading outward.

[0037] The cut pipe 5 falls onto the material support frame 67 at the horizontal work station. The limiting frame 68 limits the axial movement of the pipe 5 to prevent it from rolling off and dust from flying over a wide area. At the same time, the converter module 7 and the fan are started, and the entire dust removal and cooling system enters the standby suction state.

[0038] Step 2: Negative pressure suction of all material feeding fumes. The first cylinder 65 retracts, pulling the material support frame 67 downwards and tilting it over via the tension rod 66. The pipe 5 slides down the inclined surface of the material support frame 67 to the external collection box by its own weight; the high-temperature metal fumes and splashed molten slag generated during the feeding process drift downwards simultaneously.

[0039] The top of the receiving hopper 61 has two sets of windows 611, one near window 6111 and one far window 6112. The windows 611 are equipped with perforated exhaust plates 612. Under the negative pressure of the rear fan, the dust-laden hot airflow from the near and far of the material discharge area passes through the exhaust plates 612 and enters the dust collection chamber 62. The long waist-shaped slag leakage hole of the exhaust plate 612 can intercept large pieces of molten metal slag. The slag slides down the plate to the waste trough 69 at the bottom of the receiving hopper 61 for centralized collection, avoiding large pieces of waste slag from clogging the air duct.

[0040] Step 3: Dual-channel forced cooling (spark elimination process). The dust extraction chamber 62 is divided into two independent airflow channels, the near-flow channel and the far-flow channel, by the partition block 6241: (1) Near-flow channel airflow treatment: The high-temperature flue gas drawn in from the near window 6111 enters the near-flow channel, and the impact block 625 and the cooling plate 624 form an inclined angle, forcibly changing the airflow direction and prolonging the residence time of the flue gas in the cooling chamber; the low-temperature cooling plate 624 directly contacts the high-temperature airflow, quickly absorbs heat, and eliminates the molten metal sparks carried in the airflow. (2) Far-flow channel airflow treatment: The low-temperature flue gas drawn in from the far window 6112 enters the far-flow channel and flows along the airflow to the cooling platform 626 arranged at intervals with the windward side inclined. The flue gas exchanges heat with the wall of the low-temperature cooling platform 626 multiple times, gradually reducing the overall temperature of the airflow and ensuring that the far-end flue gas is fully cooled and there are no sparks left.

[0041] The cooling plate 624 and cooling platform 626 have a through cavity that connects to the heat exchange chamber 623 below. The refrigeration module in the converter module 7 keeps the ethylene glycol coolant at a constant temperature of 8°C. The liquid pump 71 delivers the low-temperature coolant to the heat exchange chamber 623. The coolant flows from bottom to top into the cavity of the cooling plate 624 and cooling platform 626 to absorb heat. After absorbing heat, the temperature rises to 13-16°C and flows upward into the confluence chamber 627. Another set of liquid pumps 71 sends the heated coolant back to the converter module 7 for recooling, forming a closed-loop liquid cooling cycle that continuously provides a cold source for the airflow cooling components.

[0042] The cooling chamber 622 and the heat exchange chamber 623 are completely isolated by a partition 63, with only a coolant flow channel remaining. Dust-laden gas only circulates inside the cooling chamber 622 and will not contaminate the heat exchange liquid.

[0043] Step 4: Cooled dust-laden airflow undergoes graded purification treatment. After cooling and spark elimination, the low-temperature dust-laden airflow is uniformly discharged from the dust extraction chamber 62 through the interface pipe 621 and sent to the back-end processing module; Primary coarse dust removal: The airflow first enters the cyclone separator, which relies on inertia to separate large particles of metal dust and fine molten slag in the airflow, thereby achieving the interception and collection of coarse particles; Secondary fine dust removal: The air after coarse filtration flows into the anti-static flame-retardant cartridge filter, which traps micron-sized metal dust and prevents ultrafine dust from being directly discharged and polluting the environment. The qualified clean airflow is drawn out of the equipment by the fan, completing the entire dust removal process.

[0044] Step 5: Station Reset and Residue Cleaning. After the pipe fitting 5 is unloaded, the first cylinder 65 extends, pushing the tension rod 66 to lift and reset the material support frame 67 to the horizontal receiving station, waiting to receive the next cut pipe fitting 5. The dust removal system continues to maintain low negative pressure suction until the next cutting operation is completed. Regularly pull out the waste trough 69 to clean up the large pieces of molten slag trapped inside, and simultaneously clean the dust accumulation bin of the cyclone separator and the surface of the filter cartridge to ensure stable air duct suction and cooling heat exchange efficiency.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fiber laser tube cutting machine, comprising a bed (1), characterized in that, A fixed frame (11) is mounted on one end of the upper side of the bed (1), and a front chuck mechanism (2) is mounted on the fixed frame (11). A rear chuck mechanism (3) is movably mounted on the other end of the upper side of the bed (1). A laser cutting mechanism (4) is mounted on the front chuck mechanism (2). The front chuck mechanism (2) and the rear chuck mechanism (3) are used to clamp the pipe fitting (5). A feeding mechanism (6) is provided on the discharge side of the front chuck mechanism (2). The feeding mechanism (6) includes... The receiving hopper (61) is a funnel-shaped cone structure that is wider at the top and narrower at the bottom. Windows (611) are provided on both sides of the upper end of the receiving hopper (611). Exhaust plates (612) are installed on the windows (611). A dust extraction chamber (62) is provided on the upper side of the receiving hopper (61) in conjunction with the windows (611). The dust extraction chamber (62) is connected to an interface pipe (621). The interface pipe (621) is connected to a processing module for processing dust-laden airflow.

2. The fiber laser tube cutting machine according to claim 1, characterized in that, The dust extraction chamber (62) is divided into a cooling chamber (622) and a heat exchange chamber (623). The cooling chamber (622) and the heat exchange chamber (623) are separated by a partition (63). The interface pipe (621) is connected to the cooling chamber (622). The heat exchange chamber (623) is connected to a converter module (7) for introducing heat exchange liquid into the heat exchange chamber (623).

3. The fiber laser tube cutting machine according to claim 2, characterized in that, The window (611) includes a near window (6111) and a far window (6112), wherein the near window (6111) is close to the interface pipe (621) and the far window (6112) is far from the interface pipe (621). A cooling plate (624) is provided in the cooling chamber (622) corresponding to the near window (6111). A partition block (6241) is connected to the side of the cooling plate (624) facing the interface pipe (621). The partition block (6241) is arranged at the axial position of the interface pipe (621).

4. A fiber laser tube cutting machine according to claim 3, characterized in that, The partition block (6241) divides the cooling chamber (622) into a near flow channel and a far flow channel. The near flow channel is configured as an airflow passage from the near window (6111) to the interface pipe (621), and the far flow channel is configured as an airflow passage from the far window (6112) to the interface pipe (621). An impact block (625) is provided in the near flow channel. The impact block (625) is connected to the end of the cooling plate (624) and forms an inclination angle with the surface of the cooling plate (624). A number of cooling platforms (626) are arranged at intervals along the airflow direction in the far flow channel. The cooling platforms (626) are inclined on the windward side.

5. A fiber laser tube cutting machine according to claim 4, characterized in that, The cooling plate (624) and the cooling platform (626) have a through cavity running vertically through each other. The lower side of the cavity is connected to the heat exchange chamber (623), and the upper side of the cavity is connected to a manifold (627). The output end of the manifold (627) is connected to the converter module (7). The output end of the manifold (627) and the input end of the heat exchange chamber (623) are respectively connected to the converter module (7) through a liquid pump (71). The converter module (7) has a built-in refrigeration module.

6. A fiber laser tube cutting machine according to claim 5, characterized in that, The exhaust plate (612) is a perforated screen plate with multiple sets of elongated slag leakage holes. The hole width is set to 8-12mm and the hole length is set to 40-60mm.

7. A fiber laser tube cutting machine according to claim 6, characterized in that, A support frame (64) is fixed on the other side of the receiving hopper (61). A mounting seat (641) is provided on the lower side of the support frame (64). The mounting seat (641) is fixed on the bed (1). A first cylinder (65) is hinged on the mounting seat (641). A tension rod (66) is hinged to the driving end of the first cylinder (65). One end of the tension rod (66) is hinged to the bed (1). The other end of the tension rod (66) is hinged to a material support frame (67). A set of limit frames (68) is provided on the upper side of the bed (1) in conjunction with the material support frame (67).

8. A fiber laser tube cutting machine according to claim 7, characterized in that, The receiving hopper (61) has a waste trough (69) at its lower opening for receiving molten slag falling from above. The upper sliding frame of the material support frame (67) is equipped with a dust cover (8), and the upper side of the bed (1) is equipped with a slide rail in conjunction with the dust cover (8).

9. A fiber laser tube cutting machine according to claim 8, characterized in that, The fixed frame (11) is provided with a first slide rail (21), and a first slide frame (22) is slidably mounted on the first slide rail (21). A first rotating shaft (23) is rotatably provided in the middle of the first slide rail (21). One end of the first rotating shaft (23) is connected to a first driver (24), and the first rotating shaft (23) is connected to the first slide frame (22) in a transmission connection.

10. A fiber laser tube cutting machine according to claim 9, characterized in that, The laser cutting mechanism (4) includes a lifting module (41), which is mounted on the first carriage (22). The driving end of the lifting module (41) is equipped with a laser cutting head (42).

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