Laser cutting device for metal profile production and processing

Abstract

The invention relates to the technical field of laser cutting devices, in particular to a laser cutting device for metal profile production and machining. Comprising a laser cutting part and an auxiliary part arranged in the metal profile, the laser cutting part comprises a cutting head and a nitrogen blowing assembly, the auxiliary part comprises an auxiliary head, a blowing cavity and a suction cavity which are coaxially arranged are formed in the auxiliary head, the blowing cavity is arranged on the outer side of the suction cavity, and the nitrogen blowing assembly is arranged in the suction cavity. A first air blowing opening is formed in the top of the air blowing cavity; gas blown out of the gas blowing cavity faces upwards along an inner cavity of the metal profile, and after the gas and blown gas of the nitrogen blowing assembly are converged, the gas carries metal liquid drops generated by cutting downwards to enter the suction cavity. Through the auxiliary head arranged in the metal profile and the synergistic effect of the air blowing cavity and the suction cavity, metal liquid drops and smoke dust generated by cutting are actively guided out of the inner cavity, slag accumulation is avoided, and the cutting cleanliness is improved.

Description

Technical Field

[0001] This invention relates to the field of laser cutting equipment technology, specifically to a laser cutting equipment for the production and processing of metal profiles. Background Technology

[0002] In the laser cutting of metal profiles, traditional devices typically rely solely on auxiliary gases (such as nitrogen) outside the cutting head to blow away molten slag and protect the cut surface. However, when cutting profiles with closed or complex internal cavities (such as square tubes and round tubes), the molten metal droplets and fumes generated during cutting easily accumulate in the internal cavity, making effective removal difficult. This not only affects cutting quality and precision but may also damage the inner wall of the profile, and even lead to laser head contamination or equipment malfunction. Existing technologies lack active cleaning and slag removal designs for the internal cavities of profiles, especially failing to achieve simultaneous blowing and suction of the internal cavity during cutting, thus limiting the efficiency and application effect of laser cutting in the processing of hollow profiles. Summary of the Invention

[0003] To address the above problems, the present invention provides a laser cutting device for the production and processing of metal profiles.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a laser cutting device for metal profile production and processing, including a laser cutting part and an auxiliary part disposed inside the metal profile. The laser cutting part includes a cutting head and a nitrogen blowing assembly. The auxiliary part includes an auxiliary head. The auxiliary head has a blowing chamber and a suction chamber arranged coaxially inside. The blowing chamber is disposed outside the suction chamber. A first air outlet is opened at the top of the blowing chamber. The gas blown out of the blowing chamber rises along the inner cavity of the metal profile, merges with the gas blown out of the nitrogen blowing assembly, and then carries the metal droplets generated during cutting downwards into the suction chamber.

[0005] As an optimization, the bottom of the auxiliary head has the same shape as the inner cavity of the metal profile, and the upper part of the auxiliary head is recessed to form a guide groove. The guide groove is coaxially arranged with the suction cavity and is distributed along the length direction of the auxiliary head. The bottom surface of the guide groove is provided with a suction hole, and the upper side of the guide groove is provided with a second air outlet, which is connected to the upper part of the air blowing chamber.

[0006] As an optimization, the lower side of the guide groove converges towards the bottom of the suction cavity to form a guide slope, and the bottom of the second air outlet smoothly transitions to the guide slope. A guide plate is provided on the opposite side of the air blowing chamber and the second air blowing port. The guide plate is higher than the bottom of the second air blowing port and lower than the middle of the second air blowing port. The gas inside the air blowing chamber is guided and diverted by the guide plate and discharged outward through the first air blowing port and the second air blowing port.

[0007] As an optimization, protective plates are fixed at both ends of the auxiliary head, and the protective plates have the same shape as the inner cavity of the metal profile.

[0008] As an optimization, the outer end of the blowing chamber is connected to a first connecting tube, and the outer end of the suction chamber is connected to a second connecting tube. The bottom of the second connecting tube and the bottom of the suction chamber are smoothly connected. The outer ends of the first connecting tube and the outer ends of the second connecting tube are aligned and equipped with positioning sleeves. The first connecting pipe is detachably connected to an air supply pipe, and the second connecting pipe is detachably connected to a suction pipe.

[0009] As an optimization, a positioning plate is also included, with a telescopic rod configured on the outer side of the positioning plate; The air extraction pipe and the air delivery pipe are equipped with connecting seats, and the connecting seats are equipped with support arms.

[0010] As an optimization, the suction hole is connected to the top of the suction cavity, and the bottom of the suction cavity is tapered into an arc surface; After the gas in the blowing chamber is diverted by the guide plate, part of the gas is blown directly upward through the first blowing port, and merges with the gas blown out by the nitrogen blowing component and then flows downward to form the first airflow. The other part of the gas flows outward along the guide slope through the second blowing port and merges with the first airflow, carrying the metal droplets generated by laser cutting into the suction chamber.

[0011] As an optimization, the opening direction of the first air outlet is tangent to the inner wall of the metal profile at a relative position.

[0012] The beneficial effects of this plan are as follows: By using an auxiliary head set inside the metal profile, combined with the synergistic effect of the air blowing chamber and the suction chamber, the metal droplets and fumes generated during cutting are actively discharged from the inner cavity, avoiding slag accumulation and improving the cleanliness of the cutting. The detachable air supply pipe, suction pipe and positioning sleeve and other structures facilitate installation, replacement and cleaning, improving the practicality and maintenance convenience of the equipment. The gas in the blowing chamber merges upward with the airflow of the nitrogen blowing component to form a downward airflow, which carries the droplets into the suction chamber, thereby achieving directional guidance of the airflow and improving the slag discharge efficiency. The bottom of the auxiliary head matches the shape of the inner cavity of the profile, and through the design of protective plates, guide grooves and other features, it can adapt to different profile sections, ensuring optimized airflow path and good sealing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the state in use of the present invention.

[0014] Figure 2 This is a right-side view of the invention in use.

[0015] Figure 3 For the present invention Figure 2 A schematic diagram of the AA cross-section structure.

[0016] Figure 4 This is a cross-sectional structural diagram of the auxiliary head of the present invention in use.

[0017] Figure 5 This is a schematic diagram of the support arm of the present invention.

[0018] Figure 6 This is a schematic diagram of the extraction pipe and the delivery pipe of the present invention from the axial side.

[0019] Figure 7 This is a schematic diagram of the axial side of the auxiliary head of the present invention.

[0020] Figure 8 This is a front view schematic diagram of the auxiliary head of the present invention.

[0021] Figure 9 For the present invention Figure 8 A schematic diagram of the BB cross-section structure.

[0022] The components are as follows: 1. Laser cutting part; 2. Auxiliary head; 3. Air blowing chamber; 4. Suction chamber; 5. Guide groove; 6. Suction hole; 7. First air blowing port; 8. Second air blowing port; 9. First connecting pipe; 10. Second connecting pipe; 11. Positioning sleeve; 12. Air supply pipe; 13. Suction pipe; 14. Positioning plate; 15. Telescopic rod; 16. Connecting seat; 17. Support arm; 18. First airflow; 19. Protective plate. Detailed Implementation

[0023] like Figures 1-9 As shown, a laser cutting device for metal profile production and processing includes a laser cutting part 1 and an auxiliary part disposed inside the metal profile. The laser cutting part 1 includes a cutting head and a nitrogen blowing assembly. The auxiliary part includes an auxiliary head 2. The auxiliary head 2 has a blowing chamber 3 and a suction chamber 4 arranged coaxially inside. The blowing chamber 3 is disposed outside the suction chamber 4. A first air outlet 7 is opened at the top of the blowing chamber 3. The gas blown out of the blowing chamber 3 rises along the inner cavity of the metal profile, merges with the gas blown out by the nitrogen blowing assembly, and carries the metal droplets generated during cutting downwards into the suction chamber 4.

[0024] The blowing chamber 3 generates an upward auxiliary airflow, which merges with the nitrogen protective airflow from the outside (cutting head) at the top, forming a downward "convergence". This convergence can effectively carry away the molten slag and dust generated during cutting and guide it to the inlet of the suction chamber 4 below, solving the problem of difficult slag removal in the closed inner cavity.

[0025] The laser cutting section 1 is a standard laser cutting machine configuration. The cutting head can be a high-power fiber laser cutting head from brands such as IPG or Trumpf. The laser power is selected based on the material of the profile (such as carbon steel, stainless steel, or aluminum alloy) and its thickness. The nitrogen blowing assembly must be equipped with a high-precision pressure regulating valve and flow meter to ensure stable gas pressure.

[0026] Because it needs to withstand high-temperature oxidation and metal droplet sputtering, the auxiliary head 2 should be made of high-temperature resistant and oxidation-resistant materials, such as 310S stainless steel or Inconel 600 nickel-based high-temperature alloy.

[0027] like Figure 4 As shown, the bottom of the auxiliary head 2 has the same shape as the inner cavity of the metal profile, and the upper part of the auxiliary head 2 is recessed to form a guide groove 5. The guide groove 5 is coaxially arranged with the suction cavity 4 and is distributed along the length direction of the auxiliary head 2. The bottom surface of the guide groove 5 is provided with a suction hole 6, and the upper side of the guide groove 5 is provided with a second air outlet 8, which is connected to the upper part of the air blowing chamber 3.

[0028] The bottom of the auxiliary head 2 fits snugly against the shape of the profile's inner cavity, providing initial sealing and positioning, and reducing ineffective airflow space. The "guide groove 5" is a crucial airflow convergence and guidance channel, its function being to gather the mixed airflow and molten slag from the first air outlet 7 and the second air outlet 8, and efficiently guide it into the suction hole 6. The suction hole 6 is the inlet for the molten slag to enter the suction system.

[0029] The airflow blowing obliquely downward from the second air outlet 8 acts as a "sweeping" action, blowing the slag adhering to the side wall or edge of the guide groove 5 towards the center of the bottom of the groove, where it merges with the main airflow coming down from above and is sucked in together.

[0030] The auxiliary head 2 can be semi-cylindrical, and different shapes of auxiliary heads 2 can be set according to the different shapes of the inner cavity of the metal profile.

[0031] like Figure 4 As shown, the lower side of the guide groove 5 converges towards the bottom of the suction cavity 4 to form a guide slope, and the bottom of the second air outlet 8 smoothly transitions to the guide slope. A guide plate is provided on the opposite side of the air blowing chamber 3 and the second air blowing port 8. The guide plate is higher than the bottom of the second air blowing port 8 and lower than the middle of the second air blowing port 8. The gas inside the air blowing chamber 3 is guided and diverted by the guide plate and discharged to the outside through the first air blowing port 7 and the second air blowing port 8.

[0032] The guide ramp ensures that the airflow and molten slag can slide smoothly and unobstructed into the suction chamber 4, preventing accumulation and reducing airflow disturbance and energy loss. The guide plate is the core component of the internal air path distribution. It scientifically diverts the compressed gas from the air supply pipe 12: part of it is guided upward to form an upward auxiliary airflow (exiting from the first air outlet 7), and part of it is guided laterally to form a lateral cleaning airflow (exiting from the second air outlet 8).

[0033] The upper end of the guide plate is inclined towards the upper part of the second air outlet 8. The guide plate is integrally processed or welded with the main body of the auxiliary head 2, and the material is consistent with the main body (such as 310S stainless steel).

[0034] like Figure 7 As shown, protective plates 19 are fixed at both ends of the auxiliary head 2, and the protective plates 19 have the same shape as the inner cavity of the metal profile.

[0035] The diameter of the protective plate 19 is larger than that of the auxiliary head 2. It blocks the gap between the auxiliary head 2 and the end of the profile cavity, preventing airflow and slag from escaping from both ends, ensuring that the effective path of airflow is concentrated in the cutting area and the guide groove 5. The protective plate 19 is adjacent to the inner cavity of the metal profile, reducing the space for ineffective airflow, while allowing the auxiliary head 2 to move inside the inner cavity of the metal profile.

[0036] like Figure 6 and Figure 9 As shown, the outer end of the blowing chamber 3 is connected to a first connecting pipe 9, and the outer end of the suction chamber 4 is connected to a second connecting pipe 10. The bottom of the second connecting pipe 10 and the bottom of the suction chamber 4 are smoothly connected. The outer ends of the first connecting pipe 9 and the second connecting pipe 10 are aligned and equipped with positioning sleeves 11. The first connecting pipe 9 is detachably connected to an air supply pipe 12, and the second connecting pipe 10 is detachably connected to a suction pipe 13.

[0037] The first connecting pipe 9 and the second connecting pipe 10 are the interfaces between the auxiliary head 2 and the external pipeline. A smooth transition ensures that the molten slag can smoothly enter the second connecting pipe 10 from the suction chamber 4, avoiding blockage. The positioning sleeve 11 is a key centering and positioning component, ensuring that the air supply pipe 12 and the suction pipe 13 can quickly and accurately align with the corresponding connecting pipes to achieve an airtight connection.

[0038] The first connecting pipe 9 and the second connecting pipe 10 are welded to the auxiliary head 2 and are made of the same material. The air supply pipe 12 is a high-pressure air pipe, which can be made of PU or nylon braided hydraulic hose (such as Φ8mm or Φ10mm). The suction pipe 13 needs to be wear-resistant and temperature-resistant, and can be made of rubber suction hose reinforced with steel wire. The positioning sleeve 11 can be a precision machined part of brass or stainless steel, with a quick-connect coupling or threaded locking structure.

[0039] like Figure 1 and Figure 6As shown, it also includes a positioning plate 14, and a telescopic rod 15 is disposed on the outer side of the positioning plate 14; The air extraction pipe and air delivery pipe 12 are equipped with a connecting seat 16, and the connecting seat 16 is equipped with a support arm 17.

[0040] The positioning plate 14 and the telescopic rod 15 constitute the external positioning and driving system of the auxiliary head 2. The telescopic rod 15 can precisely control the axial position of the auxiliary head 2 in the inner cavity of the profile, so that it is always aligned with the laser cutting point above.

[0041] The connecting seat 16 and the support arm 17 constitute a pipeline fixing system. The support arm 17 can be installed on the machine tool to ensure the stability of the air extraction pipe and the air delivery pipe 12.

[0042] The telescopic rod 15 can be equipped with a servo electric cylinder whose stroke is determined according to the profile length to achieve high-precision position control.

[0043] like Figure 4 As shown, the suction hole 6 is connected to the top of the suction cavity 4, and the bottom of the suction cavity 4 is tapered into an arc surface. After the gas in the blowing chamber 3 is diverted by the guide plate, part of the gas is blown directly upward through the first blowing port 7, and merges with the gas blown out by the nitrogen blowing component and then flows downward to form the first airflow 18. The other part of the gas flows outward along the guide slope through the second blowing port 8 and merges with the first airflow 18, carrying the metal droplets generated by laser cutting into the suction chamber 4.

[0044] An external air source (such as an air compressor) supplies air to the blowing chamber 3 through the air supply pipe 12; an external suction system (such as an industrial vacuum cleaner or a centralized dust removal system) creates negative pressure in the suction chamber 4 through the suction pipe 13.

[0045] The gas inside the blowing chamber 3 is split into two streams by the guide plate: stream A (main airflow) is ejected vertically upward from the first blowing port 7, and stream B (cleaning airflow) is ejected obliquely downward from the second blowing port 8. Stream A collides and mixes with the high-pressure nitrogen airflow (downward) ejected from the cutting head at the top of the profile's inner cavity, forming a powerful downward airflow (first airflow 18). To increase the size of stream B and improve the cleaning effect, the second blowing port 8 can be set to a gradually changing width to increase the air pressure.

[0046] The first airflow 18 powerfully washes over the cutting point, driving the generated slag and fumes downwards. Simultaneously, airflow B sweeps along the guide ramp, drawing any slag that might splash to the side towards the center. The two airflows converge at the bottom of the guide groove 5, carrying all the slag, and enter the suction chamber 4, which is under negative pressure, through the suction hole 6.

[0047] Under the guidance of the arc surface at the bottom of the suction chamber 4, the molten slag and exhaust gas smoothly enter the second connecting pipe 10, and are finally extracted from the interior of the profile through the suction pipe 13 and sent to the external filtration and collection device.

[0048] The "arc surface" design reduces the residue and accumulation of molten slag at the bottom of the suction chamber 4, improving the smoothness of slag discharge.

[0049] like Figure 4 As shown, the opening direction of the first air outlet 7 is tangent to the inner wall of the metal profile at a relative position.

[0050] Tangential airflow allows the airflow to "swirle" or "follow" the inner wall of the profile, rather than impacting it vertically. This serves two purposes: first, it reduces the direct erosion or cooling of the inner wall by high-speed airflow, avoiding impact on cutting quality or profile deformation; second, the swirling airflow following the wall better covers and cleans the entire inner cavity section, removing dust and fumes from hard-to-reach areas.

[0051] How to use: The metal profile to be cut is pressed against the positioning plate 14 to achieve initial positioning; The auxiliary head 2 is reliably connected to the air supply pipe 12 and the suction pipe 13 through the positioning sleeve 11. The auxiliary head 2 is inserted into the position to be cut along the inner cavity of the metal profile and fixed by the support arm 17. An external air source is connected to the air supply pipe 12, and an external suction system is connected to the suction pipe 13; The metal profile is cut by the laser cutting section 1 while protective gas is blown. At the same time, the external suction system is activated to establish a stable negative pressure inside the suction chamber 4, the external air source is turned on to deliver compressed gas to the blowing chamber 3, and the pressure valve is adjusted to keep the first blowing port 7 and the second blowing port 8 maintaining a stable airflow. The slag and fumes generated by laser cutting enter the inner cavity of the metal profile under air pressure. The airflow from the first air outlet 7 mixes with the protective airflow to form the first airflow 18. The first airflow 18 carries the slag and fumes downward and enters the suction chamber 4 through the suction hole 6.

[0052] During laser cutting, the airflow blown out from the first air outlet 7 can rise along the inner cavity of the metal profile to clean the molten slag sputtered in the inner cavity of the metal profile, while forming a swirling airflow that carries the smoke and dust downwards quickly.

[0053] After cutting is completed, keep the air blowing and suction system inside the auxiliary head 2 running for a few seconds to thoroughly remove residual smoke and dust and cool the auxiliary head 2.

[0054] The above-described specific embodiments are merely specific examples of the present invention. The patent protection scope of the present invention includes, but is not limited to, the product form and style of the above-described specific embodiments. Any laser cutting device for metal profile production and processing that conforms to the claims of the present invention, and any appropriate changes or modifications made to it by those skilled in the art, shall fall within the patent protection scope of the present invention.

Claims

1. A laser cutting device for metal profile production and processing, characterized by: The application relates to a laser cutting device, which comprises a laser cutting part (1) and an auxiliary part arranged in the metal profile, the laser cutting part (1) comprises a cutting head and a nitrogen blowing assembly, the auxiliary part comprises an auxiliary head (2), the auxiliary head (2) is internally provided with a blowing cavity (3) and a suction cavity (4) arranged on the same axis, the blowing cavity (3) is arranged outside the suction cavity (4), and a first blowing port (7) is formed in the top of the blowing cavity (3). The gas blown by the blowing cavity (3) flows upwards along the inner cavity of the metal profile, is combined with the nitrogen blowing assembly, and then carries the metal liquid drops generated by cutting into the suction cavity (4).

2. The laser cutting device for metal profile production and processing according to claim 1, characterized in that: The bottom of the auxiliary head (2) is the same as the shape of the inner cavity of the metal profile, the upper part of the auxiliary head (2) is recessed to form a guide groove (5), the guide groove (5) is arranged on the same axis as the suction cavity (4), and the guide groove (5) is distributed along the length direction of the auxiliary head (2). The bottom surface of the guide groove (5) is provided with a suction hole (6), the upper part of the side surface of the guide groove (5) is provided with a second blowing port (8), and the second blowing port (8) is in communication with the upper part of the blowing cavity (3).

3. The laser cutting device for metal profile production and processing according to claim 2, characterized in that: The lower end of the side surface of the guide groove (5) is folded towards the bottom of the suction cavity (4) to form a guide inclined surface, and the bottom of the second blowing port (8) is smoothly connected with the guide inclined surface. The opposite side of the blowing cavity (3) and the second blowing port (8) is provided with a guide plate, the guide plate is higher than the bottom of the second blowing port (8) and lower than the middle part of the second blowing port (8), the gas in the blowing cavity (3) is guided and distributed through the guide plate, and is discharged outwards through the first blowing port (7) and the second blowing port (8).

4. The laser cutting device for metal profile production and processing according to claim 1, characterized in that: The two ends of the auxiliary head (2) are fixed with protective plates (19), and the protective plates (19) are the same as the shape of the inner cavity of the metal profile.

5. The laser cutting device for metal profile production and processing according to claim 1, characterized in that: The outer end of the blowing cavity (3) is connected with a first connecting pipe (9), the outer end of the suction cavity (4) is connected with a second connecting pipe (10), the bottom of the second connecting pipe (10) is smoothly connected with the bottom of the suction cavity (4), and the outer ends of the first connecting pipe (9) and the second connecting pipe (10) are aligned and provided with a positioning sleeve (11). The first connecting pipe (9) is detachably connected with a gas feeding pipe (12), and the second connecting pipe (10) is detachably connected with a suction pipe (13).

6. The laser cutting device for metal profile production and processing according to claim 5, characterized in that: A positioning plate (14) is further arranged, and the outer side of the positioning plate (14) is provided with a telescopic rod (15). The suction pipe and the gas feeding pipe (12) are provided with a connecting seat (16), and the connecting seat (16) is provided with a supporting arm (17).

7. The laser cutting device for metal profile production and processing according to claim 3, characterized in that: The suction hole (6) is in communication with the top of the suction cavity (4), and the bottom of the suction cavity (4) is folded into a circular arc surface. After the gas in the blowing cavity (3) is distributed through the guide plate, part of the gas is directly blown upwards through the first blowing port (7), is combined with the gas blown by the nitrogen blowing assembly, and then flows downwards to form a first airflow (18), and the other part of the gas flows downwards along the guide inclined surface through the second blowing port (8), is combined with the first airflow (18), and carries the metal liquid drops generated by laser cutting into the suction cavity (4).

8. The laser cutting device for metal profile production and processing according to claim 1, characterized in that: The opening direction of the first blowing port (7) is tangent to the inner wall of the metal profile opposite position.

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