Laser cutting device for metal products

Abstract

The invention belongs to the technical field of laser cutting, and discloses a metal product laser cutting device which comprises a base and an air cylinder mounted on the base, and further comprises an air guide assembly fixedly mounted at the top of the base, and a laser cutting assembly fixedly mounted at the top of the air guide assembly, and the transmission assembly is fixedly arranged at one end of the base. The tantalum ingot main body is pushed to be continuously fed through the output end of the air cylinder, the transmission belt moves between the first template and the second template in the moving process, and the first gear and the second gear are driven to rotate in different directions through the two racks; a first connecting rod moves in an arc-shaped through groove, and a second connecting rod pushes the two ends of a wave gas guide ring to be compressed towards the middle part, so that the wave gas guide ring is gradually compressed close to a butt-joint plate, the gas flow of the laser cutting equipment to the cutting starting point of the tantalum ingot main body is increased, and it is guaranteed that auxiliary gas can accurately make contact with a notch; the situation that the cutting effect of laser cutting equipment on the tantalum ingot body is affected by too large direct injection type airflow can be avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser cutting, and specifically relates to a laser cutting device for metal products. Background Art

[0002] Laser cutting is achieved by focusing the high-energy laser beam generated by a laser onto an extremely small spot, causing the material at the spot to be rapidly heated to the melting point or boiling point, thereby realizing cutting. During the process of laser cutting tantalum ingots, the injection of auxiliary gas is a very crucial step; the auxiliary gas can not only help blow away the molten material, but also reduce the temperature of the cutting area, prevent material oxidation, and improve the cut quality. Currently, the direct injection gas injection method is usually adopted for the auxiliary gas. However, in the direct injection gas injection method, the high-speed air flow may directly impact the path or focal area of the laser beam, resulting in the deviation or scattering of the laser beam. This interference will affect the focusing effect of the laser beam, reduce the cutting accuracy and efficiency. At the same time, it only blows towards the cutting area concentrated in a fixed direction, resulting in a relatively limited air flow coverage range. For the requirements of cutting large-area or complex-shaped tantalum ingot slices, this gas injection method may not fully cover the entire cutting area, resulting in incomplete blowing or insufficient cooling in some parts, thus affecting the cut quality and processing effect. Therefore, a laser cutting device for metal products is now proposed. Summary of the Invention

[0003] To solve the problems raised in the above background art, the present invention provides a laser cutting device for metal products, which solves the problems that the existing direct injection gas injection method will affect the focusing effect of the laser beam and the air flow coverage range is relatively limited.

[0004] To achieve the above object, the present invention provides the following technical solution: A laser cutting device for metal products, including a base, a cylinder installed on the base, and further including:

[0005] A gas guiding assembly, the gas guiding assembly is fixedly installed on the top of the base;

[0006] A transmission assembly, the transmission assembly is fixedly installed at one end of the base;

[0007] Wherein, the gas guiding assembly includes a gas guiding pipe fixedly installed on the top of the base through a bracket, a tantalum ingot body is sleeved inside the gas guiding pipe, and the tantalum ingot body gradually enters the gas guiding pipe under the action of the cylinder;

[0008] One end of the inner wall of the gas guiding pipe is fixedly installed with a second docking ring, the inside of the second docking ring is connected with a wave gas guiding ring through a docking plate, docking lugs are fixedly installed on the outer periphery of both ends of the wave gas guiding ring, and an annular groove for the docking lugs to slide is opened on the inner wall of the second docking ring;

[0009] One end of the air duct is movably sleeved with a first gear and a second gear. The first gear is connected to one end of the wavy air guiding ring through a first connecting rod, and the second gear is connected to the other end of the wavy air guiding ring through a second connecting rod;

[0010] An arc-shaped through groove for the first connecting rod to pass through is formed in the second gear.

[0011] Preferably, the tantalum ingot body passes through the air duct, auxiliary gas is injected from one end of the air duct, and the wavy air guiding ring is located between the tantalum ingot body and the air duct for uniformly guiding the flowing auxiliary gas. The tantalum ingot body is cut by the transmission assembly, driving the first gear and the second gear to rotate in opposite directions, and pushing the middle parts of both ends of the wavy air guiding ring to gather.

[0012] Preferably, the transmission assembly includes a beam frame fixedly installed on the top of the base. Second templates and first templates are respectively fixedly installed at both ends of the inner wall of the beam frame. A transmission belt is movably arranged between the second template and the first template. The second template, the transmission belt and the first template are combined to form a cutting box;

[0013] A laser cutting device is assembled on the beam frame, and the laser cutting device passes through the transmission belt and is located in the cutting box;

[0014] During the process of the laser cutting device cutting the tantalum ingot body by moving along the beam frame through program control, the transmission belt is driven to move along the opposite sides of the second template and the first template.

[0015] Preferably, two racks are fixedly installed on the top of the inner wall of the transmission belt. The two racks are symmetrically arranged. The bottom of one of the racks meshes with the first gear, and the top of the other rack meshes with the second gear.

[0016] Preferably, the wavy air guiding ring is in a ring shape in the initial state, and both ends of the wavy air guiding ring are close to the laser cutting device;

[0017] The laser cutting device drives the transmission belt to move. The laser cutting device gradually approaches the tantalum ingot body for cutting treatment. At the same time, the first gear and the second gear are driven to rotate in opposite directions through the two racks, and both ends of the wavy air guiding ring are pushed to be compressed towards the middle.

[0018] Preferably, the air guiding assembly further includes an annular air injection pipe fixedly installed outside the air duct, and the annular air injection pipe is connected to an air injection device;

[0019] The inner wall of the air duct is fixedly installed with dispersion pipes in an annular array. The dispersion pipes are communicated with the annular air injection pipe, and spray holes are formed on the periphery of the dispersion pipes close to the transmission assembly.

[0020] Preferably, the transmission assembly further includes an exhaust pipe fixedly installed on the first template, and the exhaust pipe is connected to a gas purification device;

[0021] A converging cover is fixedly installed inside the first template, a protective frame is fixedly installed inside the converging cover, and the converging cover is coaxial with the tantalum ingot body.

[0022] Preferably, a guide plate is fixedly installed at the lower end inside the second template, a discharge port is opened at the bottom of the first template, a collection box is connected to the bottom of the discharge port, and the collection box is hermetically connected to the discharge port.

[0023] Preferably, the air guiding assembly further includes a card slot opened on the inner wall of the air guiding pipe, a receiving rod is movably engaged inside the card slot, and the receiving rod is installed at one end of the air guiding pipe through a first docking ring;

[0024] The tantalum ingot body is located inside the air guiding pipe and contacts the inner wall of the receiving rod;

[0025] The dispersion pipe is located between two adjacent receiving rods.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] In the present invention, the output end of the cylinder pushes the tantalum ingot body to continuously feed, and at the same time, auxiliary gas is injected from one end of the air guiding pipe, flows along the gap between the air guiding pipe and the tantalum ingot body, and passes through the corrugated air guiding ring, so that the auxiliary gas uniformly flows along the periphery of the tantalum ingot body. The laser cutting device moves gradually closer to the tantalum ingot body for cutting treatment. During the movement process, the transmission belt moves between the first template and the second template, and drives the first gear and the second gear to rotate in opposite directions through two racks, and respectively moves through the first connecting rod in the arc-shaped through groove and the second connecting rod to push both ends of the corrugated air guiding ring to be compressed towards the middle, so that the corrugated air guiding ring is gradually compressed close to the docking plate, thereby reducing the flow of the auxiliary gas, and further increasing the air flow at the cutting starting point of the laser cutting device for the tantalum ingot body, ensuring that the auxiliary gas can accurately contact the cut, and avoiding the influence of too large direct injection air flow on the cutting effect of the laser cutting device on the tantalum ingot body;

[0028] In the present invention, the injection device injects the auxiliary gas into the air guiding pipe through the spray holes, and the auxiliary gas flows towards the cutting end along the gap between the air guiding pipe and the tantalum ingot body. During the flowing process, the tantalum ingot body can be cooled to avoid too high temperature. When the auxiliary gas flows into the second template, it will enter the converging cover, and under the guidance of the converging cover, the auxiliary gas enters the cutting seam of the tantalum ingot body, and the cutting effect of the tantalum ingot body can be improved through the auxiliary gas. Description of the Drawings

[0029] Figure 1Schematic diagram of the planar structure of the present invention;

[0030] Figure 2 Schematic diagram of the external structure of the present invention;

[0031] Figure 3 Schematic diagram of the internal structure of the transmission component of the present invention;

[0032] Figure 4 Schematic diagram of the cross-sectional structure of the air guide component and the transmission component of the present invention;

[0033] Figure 5 For the present invention Figure 4 Enlarged structure diagram at position A in;

[0034] Figure 6 Schematic diagram of the cross-sectional structure of the air guide component of the present invention;

[0035] Figure 7 Schematic diagram of the disassembled structure of the transmission component and the air guide component of the present invention;

[0036] Figure 8 Schematic diagram of the disassembled structure of the air guide component of the present invention;

[0037] Figure 9 Schematic diagram of the cross-sectional structure of the air guide component of the present invention;

[0038] Figure 10 Schematic diagram of the wavy air guide ring variable structure of the present invention;

[0039] Figure 11 Schematic diagram of the mating structure of the receiving rod and the tantalum ingot body of the present invention;

[0040] Figure 12 Schematic diagram of the disassembled structure of the receiving rod and the air guide pipe of the present invention.

[0041] In the figure: 1. Base; 2. Cylinder; 3. Air guide component; 31. Air guide pipe; 32. First docking ring; 33. Bracket; 34. Card slot; 35. Tantalum ingot body; 36. Receiving rod; 311. Annular injection pipe; 312. Dispersion pipe; 313. Spray hole; 321. First gear; 322. Second gear; 323. Second docking ring; 324. Wavy air guide ring; 325. Docking plate; 326. Docking lug; 327. First connecting rod; 328. Arc-shaped through groove; 329. Second connecting rod; 4. Transmission component; 41. Beam frame; 42. Laser cutting equipment; 43. First template; 44. Exhaust pipe; 45. Transmission belt; 46. Second template; 47. Rack; 48. Guide plate; 411. Gathering cover; 412. Protective frame. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] As Figures 1 to 12 shown, the present invention provides a laser cutting device for metal products, including a base 1 and a cylinder 2 installed on the base 1, and further including:

[0044] An air guiding assembly 3, which is fixedly installed on the top of the base 1;

[0045] A transmission assembly 4, which is fixedly installed at one end of the base 1;

[0046] Among them, the air guiding assembly 3 includes an air guiding pipe 31 fixedly installed on the top of the base 1 through a bracket 33. A tantalum ingot body 35 is sleeved inside the air guiding pipe 31, and the tantalum ingot body 35 gradually enters the air guiding pipe 31 under the action of the cylinder 2;

[0047] One end of the inner wall of the air guiding pipe 31 is fixedly installed with a second docking ring 323. Inside the second docking ring 323, a wave air guiding ring 324 is connected through a docking plate 325. Docking lugs 326 are fixedly installed on the peripheries at both ends of the wave air guiding ring 324, and an annular groove for the docking lugs 326 to slide is provided on the inner wall of the second docking ring 323;

[0048] A first gear 321 and a second gear 322 are movably sleeved at one end of the air guiding pipe 31. The first gear 321 is connected to one end of the wave air guiding ring 324 through a first connecting rod 327, and the second gear 322 is connected to the other end of the wave air guiding ring 324 through a second connecting rod 329;

[0049] An arc-shaped through groove 328 for the first connecting rod 327 to pass through is provided on the second gear 322;

[0050] The tantalum ingot body 35 passes through the air guiding pipe 31. Auxiliary gas is injected from one end of the air guiding pipe 31. The wave air guiding ring 324 is located between the tantalum ingot body 35 and the air guiding pipe 31 for evenly guiding the flowing auxiliary gas. The tantalum ingot body 35 is cut through the transmission assembly 4, driving the first gear 321 and the second gear 322 to rotate in opposite directions, and pushing the middle parts of both ends of the wave air guiding ring 324 to gather;

[0051] The transmission assembly 4 includes a beam frame 41 fixedly installed on the top of the base 1. A second template 46 and a first template 43 are respectively fixedly installed at both ends of the inner wall of the beam frame 41. A transmission belt 45 is movably arranged between the second template 46 and the first template 43. The second template 46, the transmission belt 45 and the first template 43 are combined to form a cutting box;

[0052] A laser cutting device 42 is assembled on the beam frame 41, and the laser cutting device 42 passes through the transmission belt 45 and is located inside the cutting box;

[0053] During the cutting process of the tantalum ingot body 35 by the laser cutting device 42 moving along the beam frame 41 through program control, the transmission belt 45 is driven to move along the opposite side of the second template 46 and the first template 43;

[0054] Two racks 47 are fixedly installed at the top of the inner wall of the transmission belt 45. The two racks 47 are symmetrically arranged. The bottom of one rack 47 meshes with the first gear 321, and the top of the other rack 47 meshes with the second gear 322;

[0055] The wave gas guide ring 324 is in a ring shape in the initial state, and both ends of the wave gas guide ring 324 are close to the laser cutting device 42;

[0056] The laser cutting device 42 drives the transmission belt 45 to move. The laser cutting device 42 gradually approaches the tantalum ingot body 35 for cutting treatment. At the same time, the two racks 47 drive the first gear 321 and the second gear 322 to rotate in opposite directions, pushing the two ends of the wave gas guide ring 324 towards the middle for compression.

[0057] The tantalum ingot body 35 is sleeved inside the gas guide pipe 31. The output end of the air cylinder 2 pushes the tantalum ingot body 35 to continuously feed. At the same time, auxiliary gas is injected from one end of the gas guide pipe 31, flows along the gap between the gas guide pipe 31 and the tantalum ingot body 35 and passes through the wave gas guide ring 324, so that the auxiliary gas uniformly flows along the periphery of the tantalum ingot body 35. The laser cutting device 42 moves gradually closer to the tantalum ingot body 35 for cutting treatment. During the movement process, the transmission belt 45 moves between the first template 43 and the second template 46, and the two racks 47 drive the first gear 321 and the second gear 322 to rotate in opposite directions, and respectively push the two ends of the wave gas guide ring 324 towards the middle for compression through the first connecting rod 327 moving in the arc-shaped through groove 328 and the second connecting rod 329, so that the wave gas guide ring 324 approaches the docking plate 325 and is gradually compressed, thereby reducing the flow of the auxiliary gas, and then increasing the air flow at the cutting starting point of the laser cutting device 42 for the tantalum ingot body 35, and making the wave gas guide ring 324 gradually compressed following the movement of the laser cutting device 42, ensuring that the auxiliary gas can accurately contact the cut and cover the entire cutting area, and can avoid the influence of excessive direct injection air flow on the cutting effect of the laser cutting device 42 on the tantalum ingot body 35;

[0058] At the same time, the laser cutting device 42 moves in the reverse direction to drive the rack 47, the first gear 321, the second gear 322 and the wave gas guide ring 324 to reset, and reciprocates in this way to ensure the cutting effect of the tantalum ingot body 35.

[0059] The auxiliary gas includes oxygen: suitable for cutting metal materials, which can promote the combustion reaction and improve the cutting speed;

[0060] Nitrogen: an inert gas, suitable for cutting non-metallic materials or metal materials that need to prevent oxidation;

[0061] Argon: having good cooling effect, suitable for high-precision cutting and protecting the cut surface;

[0062] Helium: having excellent heat conduction performance, suitable for high-temperature cutting environments.

[0063] Blowing molten material: The auxiliary gas blows the molten tantalum material away from the cutting area through a high-speed air flow to prevent the molten material from reattaching to the cut;

[0064] Cooling effect: Some auxiliary gases (such as nitrogen and argon) have a cooling effect, which can reduce the temperature of the cutting area and reduce the heat-affected zone;

[0065] Preventing oxidation: The auxiliary gas can isolate oxygen and prevent the tantalum material from undergoing an oxidation reaction at high temperatures.

[0066] Such as Figure 4 , Figure 5 And Figure 7 As shown, the air guide assembly 3 further includes an annular air injection pipe 311 fixedly installed outside the air guide pipe 31, and the annular air injection pipe 311 is connected to the air injection device;

[0067] The inner wall of the air guide pipe 31 is fixedly installed with dispersion pipes 312 in an annular array. The dispersion pipes 312 are communicated with the annular air injection pipe 311, and spray holes 313 are arranged on the periphery of the dispersion pipes 312 near the transmission assembly 4;

[0068] The transmission assembly 4 further includes an exhaust pipe 44 fixedly installed on the first template 43, and the exhaust pipe 44 is connected to the gas purification device;

[0069] The inside of the first template 43 is fixedly installed with a converging cover 411, and a protective frame 412 is fixedly installed inside the converging cover 411. The converging cover 411 is coaxial with the tantalum ingot body 35;

[0070] A guide plate 48 is fixedly installed at the lower end inside the second template 46. A discharge port is opened at the bottom of the first template 43, and a collection box is connected to the bottom of the discharge port. The collection box is hermetically connected to the discharge port.

[0071] The annular gas injection pipe 311 is connected to the gas injection device. The auxiliary gas is injected into the interior of the gas guide pipe 31 through the injection holes 313 by the gas injection device. The auxiliary gas flows towards the cutting end along the gap between the gas guide pipe 31 and the tantalum ingot body 35. During the flowing process, the tantalum ingot body 35 can be cooled to avoid excessive temperature. When the auxiliary gas flows into the second template 46, it will enter the gathering hood 411, and under the guidance of the gathering hood 411, the auxiliary gas will enter the cutting seam of the tantalum ingot body 35. The cutting effect of the tantalum ingot body 35 can be improved through the auxiliary gas, and at the same time, the cut tantalum ingot body 35 can be cooled;

[0072] The cut tantalum ingot body 35 falls into the collection box for storage through the discharge port under the action of the curvature of the guide plate 48. The auxiliary gas in the second template 46 and the first template 43 carries the harmful gas generated by the cutting of the tantalum ingot body 35 and enters the purification device through the exhaust pipe 44 for treatment.

[0073] As Figure 6 、 Figure 11 shown in Figure 12 the gas guiding assembly 3 further includes a card slot 34 opened on the inner wall of the gas guide pipe 31. A receiving rod 36 is movably engaged inside the card slot 34. The receiving rod 36 is installed at one end of the gas guide pipe 31 through the first docking ring 32;

[0074] The tantalum ingot body 35 is located inside the gas guide pipe 31 and contacts the inner wall of the receiving rod 36;

[0075] The dispersion pipe 312 is located between two adjacent receiving rods 36.

[0076] Select a suitable receiving rod 36 according to the outer diameter of the tantalum ingot body 35. The receiving rod 36 is engaged in the card slot 34, and the first docking ring 32 and the receiving rod 36 are fixed inside the gas guide pipe 31 with bolts. Then, the tantalum ingot body 35 is inserted into the gas guide pipe 31, and the tantalum ingot body 35 is supported by the receiving rod 36 to keep the tantalum ingot body 35 coaxial with the gas guide pipe 31.

[0077] The working principle and usage process of the present invention:

[0078] The tantalum ingot body 35 is sleeved inside the gas guide pipe 31. The output end of the air cylinder 2 pushes the tantalum ingot body 35 to continuously feed in. At the same time, auxiliary gas is injected from one end of the gas guide pipe 31, flows along the gap between the gas guide pipe 31 and the tantalum ingot body 35, and passes through the wavy gas guide ring 324, so that the auxiliary gas uniformly flows along the periphery of the tantalum ingot body 35. The laser cutting device 42 moves gradually closer to the tantalum ingot body 35 for cutting treatment. During the movement process, the conveyor belt 45 moves between the first template 43 and the second template 46, and drives the first gear 321 and the second gear 322 to rotate in opposite directions through two racks 47, and respectively pushes the two ends of the wavy gas guide ring 324 to compress towards the middle through the first connecting rod 327 moving in the arc-shaped through groove 328 and the second connecting rod 329, so that the wavy gas guide ring 324 approaches the docking plate 325 and is gradually compressed, thereby reducing the flow of the auxiliary gas, and then increasing the air flow at the cutting starting point of the tantalum ingot body 35 by the laser cutting device 42, and making the wavy gas guide ring 324 gradually be compressed following the movement of the laser cutting device 42, ensuring that the auxiliary gas can accurately contact the cut and cover the entire cutting area, and being able to avoid the too large direct injection air flow from affecting the cutting effect of the laser cutting device 42 on the tantalum ingot body 35;

[0079] When the auxiliary gas flows into the second template 46, it will enter the converging cover 411, and under the guidance of the converging cover 411, the auxiliary gas enters the cutting seam of the tantalum ingot body 35. Through the auxiliary gas, the cutting effect of the tantalum ingot body 35 can be improved, and at the same time, the tantalum ingot body 35 after cutting can be cooled down;

[0080] The cut tantalum ingot body 35 falls into the collection box for storage under the action of the curvature of the guide plate 48 through the discharge port, while the auxiliary gas in the second template 46 and the first template 43 carries the harmful gas generated by cutting the tantalum ingot body 35 and enters the purification device through the exhaust pipe 44 for treatment.

[0081] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0082] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser cutting device for metal products, comprising a base (1), a cylinder (2) mounted on the base (1), characterized in that: Also includes: An air guide component (3), wherein the air guide component (3) is fixedly mounted on the top of the base (1); A transmission assembly (4), wherein the transmission assembly (4) is fixedly mounted on one end of the base (1); The air guide assembly (3) comprises an air guide tube (31) fixedly mounted on the top of the base (1) via a bracket (33); a tantalum ingot body (35) is sleeved inside the air guide tube (31); and the tantalum ingot body (35) gradually enters the air guide tube (31) under the action of the cylinder (2); A second docking ring (323) is fixedly mounted on one end of the inner wall of the air guide pipe (31); the interior of the second docking ring (323) is connected to a wave air guide ring (324) via a docking plate (325); docking lugs (326) are fixedly mounted on the periphery of both ends of the wave air guide ring (324); and an annular groove for the docking lugs (326) to slide is provided on the inner wall of the second docking ring (323); A first gear (321) and a second gear (322) are movably sleeved on one end of the air guide tube (31); the first gear (321) is connected to one end of the wave air guide ring (324) via a first connecting rod (327); and the second gear (322) is connected to the other end of the wave air guide ring (324) via a second connecting rod (329); The second gear (322) is provided with an arc-shaped through slot (328) for the first connecting rod (327) to pass through.

2. The laser cutting device for metal products according to claim 1, characterized in that: The tantalum ingot body (35) passes through the air guide tube (31), and auxiliary gas is injected from one end of the air guide tube (31). The wave air guide ring (324) is located between the tantalum ingot body (35) and the air guide tube (31) and is used to evenly guide the flow of auxiliary gas. The tantalum ingot body (35) is cut by the transmission component (4), driving the first gear (321) and the second gear (322) to rotate in different directions, thereby pushing the middle parts of the two ends of the wave air guide ring (324) to gather together.

3. The laser cutting device for metal products according to claim 1, characterized in that: The transmission assembly (4) comprises a beam frame (41) fixedly mounted on the top of the base (1), a second template (46) and a first template (43) are respectively fixedly mounted on two ends of the inner wall of the beam frame (41), a transmission belt (45) is movably arranged between the second template (46) and the first template (43), and the second template (46), the transmission belt (45) and the first template (43) are combined to form a cutting box; The beam frame (41) is equipped with a laser cutting device (42), and the laser cutting device (42) passes through a transmission belt (45) and is located in a cutting box; The laser cutting device (42) is controlled by a program to move along the beam frame (41) during the process of cutting the tantalum ingot body (35), thereby driving the transmission belt (45) to move along the second template (46) and the side opposite to the first template (43).

4. The laser cutting device for metal products according to claim 3, characterized in that: Two racks (47) are fixedly mounted on the top of the inner wall of the transmission belt (45), and the two racks (47) are symmetrically arranged, wherein the bottom of one of the racks (47) is meshed with the first gear (321), and the top of the other rack (47) is meshed with the second gear (322).

5. The laser cutting device for metal products according to claim 4, characterized in that: The wave air guide ring (324) is in a ring shape in an initial state, and two ends of the wave air guide ring (324) are close to the laser cutting device (42); The laser cutting device (42) drives the transmission belt (45) to move, and the laser cutting device (42) gradually approaches the tantalum ingot body (35) to cut it, and at the same time drives the first gear (321) and the second gear (322) to rotate in different directions through the two racks (47), pushing the two ends of the wave air guide ring (324) to be compressed toward the middle.

6. The laser cutting device for metal products according to claim 3, characterized in that: The gas guide assembly (3) further comprises an annular gas injection pipe (311) fixedly mounted on the outside of the gas guide pipe (31), and the annular gas injection pipe (311) is connected to a gas injection device; The inner wall of the air guide pipe (31) is fixedly provided with a dispersion pipe (312) in an annular array. The dispersion pipe (312) is connected to the annular air injection pipe (311). The periphery of the dispersion pipe (312) is provided with a spray hole (313) near the transmission assembly (4).

7. The laser cutting device for metal products according to claim 6, characterized in that: The transmission assembly (4) further comprises an exhaust pipe (44) fixedly mounted on the first template (43), wherein the exhaust pipe (44) is connected to a gas purification device; A gathering cover (411) is fixedly installed inside the first template (43), a protective frame (412) is fixedly installed inside the gathering cover (411), and the gathering cover (411) and the tantalum ingot body (35) are kept coaxial.

8. The laser cutting device for metal products according to claim 7, characterized in that: A guide plate (48) is fixedly mounted at the lower end of the second template (46), a discharge port is provided at the bottom of the first template (43), a collecting box is connected to the bottom of the discharge port, and the collecting box and the discharge port are sealed.

9. The laser cutting device for metal products according to claim 6, characterized in that: The air guide assembly (3) further comprises a slot (34) formed on the inner wall of the air guide tube (31), a receiving rod (36) being movably engaged inside the slot (34), and the receiving rod (36) being mounted on one end of the air guide tube (31) via a first docking ring (32); The tantalum ingot body (35) is located inside the air guide tube (31) and is in contact with the inner wall of the receiving rod (36); The dispersion pipe (312) is located between two adjacent receiving rods (36).

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