Laser cutting equipment for profile cutting

Abstract

The present invention provides a laser cutting device for profile cutting, which belongs to the field of profile laser cutting equipment, including a feed bracket, a cutting bracket fixedly connected to the feed bracket, a material receiving assembly fixedly connected to the cutting bracket, a cutting assembly arranged inside the cutting bracket, and further including: a front clamping assembly, the front clamping assembly arranged below the cutting assembly, the front clamping assembly used to stabilize the position of the rectangular tube and reduce heat transfer; a cleaning assembly arranged inside the front clamping assembly, the cleaning assembly used to keep the surface of the rectangular tube clean; an auxiliary heat dissipation assembly, the auxiliary heat dissipation assembly arranged below the front clamping assembly, the auxiliary heat dissipation assembly used to enhance the heat dissipation effect of the front clamping assembly. This invention effectively suppresses the problem of heat accumulation caused by the continuous action of the laser, prevents local overheating in the contact area between the clamp and the profile, and significantly improves the stability of the clamping system.

Description

Technical Field

[0001] The present invention relates to the field of profile laser cutting equipment, and in particular to a laser cutting equipment for profile cutting. Background Art

[0002] Profile laser cutting equipment is an automated processing system specially designed for high-precision cutting of metal profiles. Its core consists of a high-power laser generator, a precision feeding mechanism, a three-dimensional cutting head and an intelligent control system.

[0003] When existing laser cutting equipment continuously cuts rectangular tube profiles, the high temperature generated during the laser cutting process will continuously act on the surface of the profile and quickly diffuse to the clamping area through heat conduction, causing the local temperature of the fixture to rise. Since metal materials have good thermal conductivity, heat easily accumulates near the clamping point, causing the profile and the clamp to expand locally due to heat. This uneven heat distribution may not only cause the profile to deform, but also change the contact state between it and the clamp, causing gaps or interference in the contact surface between the originally tightly fitted clamp and the profile, thereby affecting the clamping stability; during the transportation, storage or front-end processing of square tubes, dust, metal debris and other impurities may adhere to the surface. These impurities mainly come from residues on the surface of raw materials, environmental dust pollution and metal particles generated during the processing process. If these impurities are not removed, it will directly affect the quality of laser cutting.

[0004] How to invent a laser cutting device for profile cutting to improve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In order to make up for the above deficiencies, the present invention provides a laser cutting device for profile cutting, aiming to improve the problems mentioned in the above background.

[0006] The present invention is achieved in that:

[0007] The present invention provides a laser cutting device for profile cutting, comprising a feed bracket, a cutting bracket fixedly connected to the feed bracket, a material receiving assembly fixedly connected to the cutting bracket, a cutting assembly arranged on the inner side of the cutting bracket, a side wall of the feed bracket fixedly connected to a supporting assembly, a rear clamping assembly slidingly arranged on the top of the feed bracket, and further comprising: a front clamping assembly, the front clamping assembly being arranged below the cutting assembly, the front clamping assembly being used to stabilize the position of the rectangular tube and reduce heat transfer; a cleaning assembly, the cleaning assembly being arranged on the inner side of the front clamping assembly, the cleaning assembly being used to keep the surface of the rectangular tube clean; and an auxiliary heat dissipation assembly, the auxiliary heat dissipation assembly being arranged below the front clamping assembly, the auxiliary heat dissipation assembly being used to enhance the heat dissipation effect of the front clamping assembly.

[0008] Preferably, the cutting bracket is fixedly connected to a support seat, the front clamping assembly is located on the support seat, a driven gear is provided on the front clamping assembly, the inner side wall of the cutting bracket is fixedly connected to a motor, a driving gear is fixedly sleeved on the output shaft of the motor, and the driven gear is meshed with the driving gear.

[0009] Preferably, the front clamping assembly includes a rotating seat and a rotating cover fixedly connected to the support seat, the rotating seat is fixedly connected to the rotating cover, the rotating cover is rotatably connected to the clamping seat, a plurality of movable seats are slidably arranged on the clamping seat, the movable seats are equidistantly distributed on the clamping seat, the side walls of the movable seat are fixedly connected to clamping jaws, the outer side walls of the clamping jaws are fixedly connected to heat insulation plates, a plurality of the clamping jaws are connected to connecting pipes, the clamping jaws are distributed in series on the connecting pipes, the side walls of the clamping jaws are fixedly connected to a stabilizing frame, and the stabilizing frame is rotatably connected to a stabilizing wheel.

[0010] Preferably, a roller is rotatably connected to the clamping jaw, a first cooling channel is provided in the clamping jaw, a second cooling channel and a plurality of equally spaced fine channels are provided in the roller, the second cooling channel is connected to the plurality of fine channels, circumferential grooves are provided on the shafts at both ends of the roller, a plurality of air holes are provided on the roller at the circumferential grooves, the air holes are connected to the second cooling channel and the first cooling channel, mounting holes are provided on both sides of the clamping jaw, a connecting channel is provided at the position of the mounting hole of the clamping jaw, the connecting channel is perpendicular to the mounting hole, and the mounting hole is sealed to the outer side walls at both ends of the roller.

[0011] Preferably, the cleaning assembly includes a fixed seat fixedly connected to the bottom side wall of the stabilizing frame, the fixed seat is located between the clamping seat and the clamping claw, the bottom of the fixed seat is fixedly connected to a plurality of extrusion springs, the bottom end of the extrusion spring is fixedly connected to a scraper, the top of the scraper is fixedly connected to a slide, the slide is slidably connected to the bottom of the fixed seat, a through hole is provided on the scraper, the through hole corresponds to the position of the connecting channel, the connecting channel and the through hole are connected by a high-pressure hose, a narrow channel is provided in the scraper, the narrow channel is connected to the through hole, and one side wall of the bottom end of the scraper is set at an angle to the outer wall of the square tube profile.

[0012] Preferably, the front clamping assembly also includes a connecting seat, the rotating seat is fixedly connected to the side wall of the driven gear, the rotating seat is rotatably sleeved on the outer side wall of the connecting seat, the end of the connecting seat is fixedly connected with a connecting sleeve, the connecting sleeve is fixedly connected to the clamping seat, the outer side wall of the connecting sleeve is fixedly sleeved with two incomplete annular gears, the teeth on both sides of the two incomplete annular gears are vertically arranged, and the inner side wall of the clamping seat is fixedly connected with a connecting disk.

[0013] Preferably, the outer wall of the connecting disk is fixedly connected to four fixed shafts, and the four fixed shafts are evenly distributed in the circumferential direction of the connecting disk, and a cylinder is rotatably connected to the fixed shaft, and the connecting disk is rotatably connected to four large gears and four stable gears through multiple center shafts, and the stable gear is meshed with the large gear, and two relative stable gears are meshed with one of the incomplete annular gears, and the other two relative stable gears are meshed with the other incomplete annular gear. An eccentric shaft is fixedly connected to the large gear, and the eccentric shaft is rotatably connected to the end of the cylinder reciprocating shaft, and the center axis of the stable gear passes through the connecting disk, and the center axis fixed sleeve of the stable gear is provided with a small gear, and the inner side wall of the clamping seat is fixedly connected to four sliding seats, and the inner side wall of the slide seat is slidably connected to a rack, and teeth and pinion are provided on both sides of the rack, and the rack and pinion are meshed.

[0014] Preferably, the auxiliary heat dissipation component includes a carbon dioxide gas tank fixedly connected to the cutting bracket, liquid carbon dioxide is provided in the carbon dioxide gas tank, a valve body is fixedly connected to the carbon dioxide gas tank, and the top of the valve body is fixedly connected to the bottom of the support seat through a heat conduction plate.

[0015] The top end of the piston rod of described sliding panel also is provided with an end cap, and the piston rod of described sliding panel also is provided with an end cap, and the piston rod of described sliding panel also is provided with an end cap.

[0016] Preferably, the air outlet pipe is connected to a connecting pipe through a high-pressure air pipe, and the connecting pipe is connected to an external air pump.

[0017] The beneficial effects of the present invention are as follows: the square tube is clamped by multiple cylinders driving the clamps and rollers to achieve dynamic clamping and positioning; multiple channels are set inside the clamps and rollers, and air flows in from the connecting pipe, flows through the multi-layer channels inside the clamps and rollers, and directly takes away the heat transferred from the square tube to the rollers, thereby blocking the heat from diffusing to the clamp from the source, preventing the roller from expanding due to high temperature, resulting in increased rolling resistance and deformation of the square tube, improving the stability of the equipment during continuous cutting, and achieving active cooling of the clamping area; at the same time, a paraffin phase change material sealing box and a carbon dioxide gas tank linkage device are set in the support seat, which automatically triggers the release of low-temperature gas when the temperature rises to a critical value, further enhancing the overall heat dissipation capacity, thereby effectively suppressing the heat accumulation problem caused by the continuous action of the laser, preventing local overheating in the contact area between the clamp and the profile, and significantly improving the stability of the clamping system;

[0018] The scraper in the cleaning component is combined with the narrow channel air curtain to simultaneously remove dust and other dirt from the profile surface during the clamping process and blow impurities away from the cutting area; the cleaning gas and the cooling gas share the same channel to form an integrated cleaning and cooling mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the position of a driven gear of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of a front clamping assembly of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a clamping structure of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0024] Figure 5 This is a schematic cross-sectional structure diagram of a roller of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the front clamping assembly of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0027] Figure 8 yes Figure 7 Enlarged view of point B;

[0028] Figure 9 This is a schematic diagram of the internal structure of a front clamping assembly of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0029] Figure 10 This is a schematic structural diagram of an auxiliary heat dissipation component of a laser cutting device for profile cutting provided by an embodiment of the present invention;

[0030] Figure 11 This is a schematic structural diagram of another perspective of an auxiliary heat dissipation component of a laser cutting device for profile cutting provided in an embodiment of the present invention;

[0031] Figure 12 yes Figure 11 Enlarged view of point C in the middle.

[0032] In the figure: 1. Feeding bracket; 2. Cutting bracket; 3. Receiving assembly; 4. Support assembly; 5. Rear clamping assembly; 6. Support seat; 7. Driven gear; 8. Motor; 9. Rotating seat; 10. Rotating cover; 11. Clamping seat; 12. Moving seat; 13. Clamping jaw; 14. Heat shield; 15. Connecting pipe; 16. Stabilizing frame; 21. Roller; 22. First cooling channel; 23. Second cooling channel; 24. Fine channel; 25. Circumferential groove; 26. Ventilation hole; 27. Mounting hole; 28. Connecting channel; 31. Fixed seat; 32. Extrusion spring; 33. Scraper; 34. Slide plate; 35. Through hole; 36. Narrow channel; 42. Connecting seat; 43. Connecting sleeve; 44. Incomplete ring gear; 45. Fixed shaft; 46. Cylinder; 47. Large gear; 48. Stabilizing gear; 49. Small gear; 50. Connecting plate; 51. Sliding seat; 52. Rack; 61. CO2 tank; 62. Valve body; 63. Sealing box; 64. Sleeve; 65. Push rod; 66. Piston; 67. Fixed bracket; 68. Return spring; 69. Lever; 70. Sliding seat; 71. Valve stem; 72. Sealing seat; 73. Air duct; 74. Exhaust pipe. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] Example, refer to Figures 1-8 A laser cutting device for cutting profiles includes a feed bracket 1, a cutting bracket 2 fixedly connected to the feed bracket 1, a material receiving assembly 3 fixedly connected to the cutting bracket 2, a cutting assembly provided inside the cutting bracket 2, a support assembly 4 fixedly connected to a side wall of the feed bracket 1, a rear clamping assembly 5 slidably provided on the top of the feed bracket 1, and further includes:

[0035] Front clamping assembly, the front clamping assembly is arranged below the cutting assembly, the front clamping assembly is used to stabilize the position of the rectangular tube and reduce heat transfer; cleaning assembly, the cleaning assembly is arranged on the inner side of the front clamping assembly, the cleaning assembly is used to keep the surface of the rectangular tube clean; auxiliary heat dissipation assembly, the auxiliary heat dissipation assembly is arranged below the front clamping assembly, the auxiliary heat dissipation assembly is used to enhance the heat dissipation effect of the front clamping assembly, a laser cutting head is provided in the cutting assembly for cutting square tubes; the rear clamping assembly 5 is used to clamp the square tube to be cut, and by controlling the rear clamping assembly 5 to move toward the direction of the receiving assembly 3, it is used to transport the square tube to be cut and meet the cutting in the length direction of the square tube; the support assembly 4 is used to support the middle part of the rectangular tube to prevent the middle position of the length of the rectangular tube from sinking.

[0036] The cutting bracket 2 is fixedly connected to a support base 6, and the front clamping assembly is located on the support base 6. A driven gear 7 is provided on the front clamping assembly. The inner side wall of the cutting bracket 2 is fixedly connected to a motor 8. A driving gear is fixedly sleeved on the output shaft of the motor 8. The driven gear 7 is meshed with the driving gear. The motor 8 rotates the driven gear 7 by driving the driving gear to rotate, thereby providing rotational power for the front clamping assembly, so as to complete the four-sided cutting of the square tube.

[0037] The front clamping assembly includes a rotating seat 9 and a rotating cover 10 fixedly connected to the support seat 6. The rotating seat 9 is fixedly connected to the rotating cover 10. The rotating cover 10 is rotatably connected to a clamping seat 11. A plurality of movable seats 12 are slidably provided on the clamping seat 11. The movable seats 12 are equidistantly distributed on the circumference of the clamping seat 11. The side walls of the movable seat 12 are fixedly connected to clamping jaws 13. The outer side walls of the clamping jaws 13 are fixedly connected to heat insulation plates 14. A plurality of clamping jaws 13 are connected to connecting pipes 15. The clamping jaws 13 are distributed in series on the connecting pipes 15. The side walls of the clamping jaws 13 are fixedly connected to stabilizing frames 16. The stabilizing frames 16 are rotatably connected to stabilizing wheels. When cutting square tubes, the high temperature of cutting generates heat radiation that is transferred to the front clamping assembly, causing the front clamping assembly to heat up. By providing the heat insulation plate 14, a large amount of heat radiation between the cutting area and the front clamping assembly is reduced. Isolation prevents heat radiation from being directly transferred to the front clamping assembly, greatly slowing down the heating rate of the front clamping assembly. A roller 21 is rotatably connected to the clamping jaw 13. A first cooling channel 22 is provided in the clamping jaw 13. A second cooling channel 23 and a plurality of equidistantly arranged fine channels 24 are provided in the roller 21. The second cooling channel 23 is connected to the plurality of fine channels 24. Circumferential grooves 25 are provided on the shafts at both ends of the roller 21. The roller 21 is provided with a plurality of air vents 26 at the circumferential grooves 25. The air vents 26 are connected to the second cooling channel 23 and the first cooling channel 22. Mounting holes 27 are provided on both sides of the clamping jaw 13. A connecting channel 28 is provided at the position of the mounting hole 27 of the clamping jaw 13. The connecting channel 28 is perpendicular to the mounting hole 27, and the mounting hole 27 is sealed to the outer side walls of the roller 21 at both ends.

[0038] The cleaning assembly includes a fixed seat 31 fixedly connected to the bottom side wall of the stabilizing frame 16. The fixed seat 31 is located between the clamping seat 11 and the clamping claw 13. A plurality of extrusion springs 32 are fixedly connected to the bottom of the fixed seat 31. The bottom end of the extrusion spring 32 is fixedly connected to a scraper 33. The top of the scraper 33 is fixedly connected to a slide plate 34. The slide plate 34 is slidably connected to the bottom of the fixed seat 31. The slide plate 34 is inside the fixed seat 31 to improve the stability of the scraper 33. A through hole 35 is provided on the scraper 33. The through hole 35 corresponds to the position of the connecting channel 28. The connecting channel 28 and the through hole 35 are connected by a high-pressure hose. A narrow channel 36 is provided in the scraper 33. The narrow channel 36 is connected to the through hole 35. One side wall of the bottom end of the scraper 33 is set at an angle to the outer wall of the square tube profile.

[0039] It should be noted that: the roller 21 is a component that is in direct contact with the square tube. By supplying air to the connecting tube 15, the air flow enters the first cooling channel 22 of each clamping jaw 13 in turn, and then passes through the circumferential groove 25, the air vent 26, the second cooling channel 23 and multiple fine channels 24 on one side of the roller 21, taking away the heat transferred from the square tube to the roller 21, and reducing the heat transfer from the source of heat transfer; the air flow is blown out from the air vent 26 on the other side, passes through the air vent 26, the connecting channel 28 and the through hole 35, and enters the narrow channel 36. The air flow blown out of the narrow channel 36 blows onto the surface of the square tube, increasing the flow rate of the surrounding air, taking away the heat from the surface of the square tube, cooling the square tube, suppressing the temperature rise of the square tube, and preventing the square tube from deforming and affecting the clamping effect.

[0040] By providing a plurality of equally spaced thin channels 24, the airflow from the second cooling channel 23 is dispersed, and the contact area between the airflow and the roller 21 is increased, which is beneficial for transferring the heat of the roller 21 to the airflow and enhancing the cooling effect.

[0041] By setting an extrusion spring 32, the extrusion spring 32 pushes the bottom of the scraper 33 to fit into the square tube. An angle is set between the bottom of the scraper 33 and the square tube. The airflow is blown out from the angle, so that the direction of the airflow is opposite to the direction of movement when the square tube is cut. When the square tube moves toward the cutting assembly, the scraper 33 scrapes the dirt on the surface of the square tube to keep the surface of the square tube clean; by setting a narrow channel 36, when the airflow passes through the narrow channel 36, in order to adapt to the shape of the narrow channel 36, the shape of the cylindrical airflow is changed to the shape of the air curtain, which increases the area covered by the airflow and supports covering square tubes of different widths; the airflow blows away the dirt scraped off the scraper 33, so that the dirt moves away from the cutting area, keeps the scraper 33 clean, and does not affect the cutting.

[0042] The front clamping assembly also includes a connecting seat 42, which is fixedly connected to the side wall of the driven gear 7, and the rotating seat 9 is rotatably sleeved on the outer wall of the connecting seat 42. The end of the connecting seat 42 is fixedly connected to a connecting sleeve 43, and the connecting sleeve 43 is fixedly connected to the clamping seat 11. The outer wall of the connecting sleeve 43 is fixedly sleeved with two incomplete ring gears 44, and the positions of the teeth on both sides of the two incomplete ring gears 44 are vertically arranged. The inner side wall of the clamping seat 11 is fixedly connected to a connecting disk 50, and the outer side wall of the connecting disk 50 is fixedly connected to four fixed shafts 45. The four fixed shafts 45 are evenly distributed in the circumferential direction of the connecting disk 50. A cylinder 46 is rotatably connected to the fixed shaft 45, and the connecting disk 50 is rotatably connected to four large Gear 47 and four stabilizing gears 48, the stabilizing gear 48 is meshed with the large gear 47, two opposite stabilizing gears 48 are meshed with one of the incomplete ring gears 44, and the other two opposite stabilizing gears 48 are meshed with the other incomplete ring gear 44. An eccentric shaft is fixedly connected to the large gear 47, and the eccentric shaft is rotatably connected to the end of the reciprocating shaft of the cylinder 46. The central axis of the stabilizing gear 48 passes through the connecting disk 50, and the central axis of the stabilizing gear 48 is fixedly sleeved with a small gear 49. Four slides 51 are fixedly connected to the inner side wall of the clamping seat 11, and the inner side wall of the slide 51 is slidably connected with a rack 52. Teeth and small gears 49 are provided on both sides of the rack 52, and the rack 52 is meshed with the small gear 49.

[0043] It should be noted that: by driving two of the opposing cylinders 46, the reciprocating ends of the cylinders 46 contract, driving the large gear 47 to rotate through the eccentric shaft, the large gear 47 drives the stabilizing gear 48 to rotate, the stabilizing gear 48 drives the small gear 49 to rotate through the center axis, and the small gear 49 drives the rack 52 to slide inside the slide 51, so that the two opposing moving seats 12 move relative to each other, driving the two opposing clamping jaws 13 to approach each other, and clamping the two sides of the square tube through the rollers 21 thereon. The rollers 21 apply clamping force but do not hinder the movement of the square tube in the length direction; by setting an incomplete ring gear 44 and setting two opposing stabilizing gears 48 to mesh with one of the incomplete ring gears 44, the stabilizing gear 48 rotates synchronously with the incomplete ring gear 44 during rotation; by driving the other two cylinders 46, precise center positioning is provided for the square tube, so that the square tube maintains a stable axis during rotation.

[0044] When the driven gear 7 rotates, it drives the connecting seat 42 to rotate on the rotating seat 9. The connecting seat 42 drives the connecting sleeve 43 to rotate, and drives the clamping seat 11 to rotate. The clamping seat 11 drives multiple clamping claws 13 to do circular motion through the moving seat 12, so that the square tube rotates.

[0045] Reference Figures 9-12The auxiliary heat dissipation component includes a carbon dioxide gas tank 61 fixedly connected to the cutting bracket 2, and liquid carbon dioxide is set in the carbon dioxide gas tank 61. A valve body 62 is fixedly connected to the carbon dioxide gas tank 61. The top of the valve body 62 is fixedly connected to the bottom of the support seat 6 through a heat conduction plate. The inner wall of the support seat 6 is fixedly connected to a sealing box 63. Paraffin phase change material is set in the sealing box 63. The bottom of the sealing box 63 is fixedly connected to a sleeve 64. The sleeve 64 is connected to the sealing box 63. A push rod 65 is slidably provided on the inner wall of the sleeve 64. The top of the push rod 65 is fixedly connected to a piston 66. The outer wall of the piston 66 is fitted with the inner wall of the sleeve 64. The outer wall of the push rod 65 is sleeved with a reset spring 68. The reset spring The bottom end of the spring 68 is fixedly connected to the inner wall of the sleeve 64, and the top of the return spring 68 conflicts with the bottom of the piston 66. The bottom end of the valve body 62 is fixedly connected to the fixing frame 67, and the bottom end of the fixing frame 67 is rotatably connected to the lever 69. The end of the lever 69 is movably connected to the sliding seat 70. The top of the sliding seat 70 is fixedly connected to the valve stem 71, and the top of the valve stem 71 is fixedly connected to the sealing seat 72. An air duct 73 is provided inside the valve body 62, and the air duct 73 is connected to the carbon dioxide gas tank 61. An air outlet pipe 74 is provided on the valve body 62, and the sealing seat 72 is provided to seal the air duct connected to the air outlet pipe 74. The air outlet pipe 74 is connected to the connecting pipe 15 through the high-pressure air pipe, and the connecting pipe 15 is connected to the external air pump.

[0046] By arranging the sealing box 63 inside the support base 6 and arranging the paraffin phase change material therein, when the external temperature is high, the heat dissipation effect of the airflow on the roller 21 is weakened, and the heat transferred to the roller 21 is transferred to the support base 6 through the rotating cover 10, the support base 6 increases the temperature of the paraffin phase change material inside the sealing box 63. The paraffin phase change material can be liquefied before the temperature reaches the temperature that will burn the staff. The volume of the liquefied paraffin phase change material increases, pushing the piston 66, driving the push rod 65 to move downward, and the bottom of the push rod 65 pushes the end of the lever 69, and the lever 69 Rotating on the fixed frame 67, the lever 69 pushes the valve stem 71 to move upward through the sliding seat 70, so that the sealing seat 72 no longer blocks the passage between the vent 73 and the outlet pipe 74. The carbon dioxide gas in the carbon dioxide tank 61 rushes out from the outlet pipe 74, expands and absorbs heat to become a gas with a lower temperature, enters the connecting pipe 15 through the high-pressure air pipe, and mixes with the gas in the connecting pipe 15. The mixed lower-temperature gas passes through the thin channel 24 to cool the roller 21, and is blown out from the narrow channel 36 to cool the square tube, thereby preventing the temperature of the front clamping assembly and the square tube from continuing to rise.

[0047] The working process of the laser cutting equipment for profile cutting is as follows: First, the rectangular tube to be cut is clamped by the rear clamping assembly 5 on the feeding bracket 1 and pushed toward the cutting area along the guide rail. During this process, the support assembly 4 provides support to the middle of the square tube to prevent it from sagging due to gravity and affecting the cutting accuracy. At the same time, the front clamping assembly starts to start, the cylinder 46 drives the large gear 47 to rotate, and drives the incomplete ring gear 44 to rotate synchronously through the stabilizing gear 48. The orthogonal arrangement of the gear set ensures that the four clamping jaws 13 are precisely linked. The small gear 49 converts the rotation into the linear motion of the rack 52, driving the moving seat 12 to slide smoothly, and finally making the roller 21 evenly clamp the square tube. The roller 21 contacts and clamps both sides of the square tube, and allows the square tube to slide along the length direction while clamping to match the cutting feed, realizing the integrated function of clamping positioning and dynamic clamping. Then, motor 8 starts, driving the driving gear to rotate. This, in turn, meshes with driven gear 7, causing the entire front clamping assembly (including rotating base 9, rotating cover 10, clamping base 11, etc.) to rotate about its axis, thereby driving the square tube to rotate. This, combined with the upward and downward movement of the laser cutting head, allows for continuous cutting on all four sides of the tube. This process not only enables the rotation function but also ensures stability during rotation through the stabilizing wheel and structural design, demonstrating the functionality of combining rotary cutting with dynamic balancing.

[0048] During the entire cutting process, the high temperature generated by the laser will affect the clamping components through heat radiation and conduction. Therefore, the equipment has set up multiple heat dissipation measures: a heat shield 14 is provided on the outside of the clamping jaw 13 to effectively isolate the heat radiation; a first cooling channel 22, a second cooling channel 23 and a plurality of fine channels 24 are provided inside the roller 21. The cooling gas (such as compressed air or carbon dioxide) enters the clamping jaw 13 through the connecting pipe 15 and flows through these cooling structures to take away the heat. At the same time, the air flow is blown out from the narrow channel 36 at the bottom of the scraper 33 to form an air curtain to cool the surface of the square tube; in addition, the support seat 6 is provided with a sealed box 63 filled with paraffin phase change material. When the temperature rises to the set value, the paraffin liquefies and expands, pushing the piston 66, triggering the valve body 62 to release low-temperature carbon dioxide gas. The gas enters the connecting pipe 15 through the high-pressure gas pipe and mixes with the gas in the connecting pipe 15. The mixed lower-temperature gas passes through the fine channel 24 to cool the roller 21 and is blown out from the narrow channel 36 to cool the square tube, preventing the temperature of the front clamping assembly and the square tube from continuing to rise, further enhancing the overall heat dissipation effect, and realizing a comprehensive thermal management function combining active cooling and passive heat dissipation. At the same time, the scraper 33 in the cleaning assembly is pressed against the surface of the square tube under the action of the extrusion spring 32, scraping and cleaning as the square tube moves; the direction of the airflow ejected from the narrow channel 36 is opposite to the direction of the square tube's movement, which not only improves cleaning efficiency but also blows scraped impurities away from the cutting area, maintaining a clean working environment.

[0049] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0050] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A laser cutting device for cutting profiles, comprising a feed bracket (1), a cutting bracket (2) fixedly connected to the feed bracket (1), a material receiving assembly (3) fixedly connected to the cutting bracket (2), a cutting assembly provided inside the cutting bracket (2), a support assembly (4) fixedly connected to a side wall of the feed bracket (1), a rear clamping assembly (5) slidably provided on the top of the feed bracket (1), a support seat (6) fixedly connected to the cutting bracket (2), characterized in that: Also includes: A front clamping assembly, which is disposed below the cutting assembly and is used to stabilize the position of the rectangular tube and reduce heat transfer; A cleaning assembly, which is arranged on the inner side of the front clamping assembly and is used to keep the surface of the rectangular tube clean; Auxiliary heat dissipation component, the auxiliary heat dissipation component is arranged below the front clamping component, the auxiliary heat dissipation component is used to enhance the heat dissipation effect of the front clamping component, The front clamping assembly is located on the support seat (6), and the front clamping assembly includes a rotating seat (9) and a rotating cover (10) fixedly connected to the support seat (6), the rotating seat (9) is fixedly connected to the rotating cover (10), the rotating cover (10) is rotatably connected to the clamping seat (11), a plurality of movable seats (12) are slidably provided on the clamping seat (11), the movable seats (12) are circumferentially equidistantly distributed on the clamping seat (11), the side wall of the movable seat (12) is fixedly connected to a clamping claw (13), the outer side wall of the clamping claw (13) is fixedly connected to a heat insulation plate (14), a plurality of the clamping claws (13) are connected to a connecting pipe (15), and the clamping claws (13) are distributed in series on the connecting pipe (15). The auxiliary heat dissipation assembly comprises a carbon dioxide gas tank (61) fixedly connected to the cutting bracket (2), wherein liquid carbon dioxide is provided in the carbon dioxide gas tank (61), a valve body (62) is fixedly connected to the carbon dioxide gas tank (61), and the top of the valve body (62) is fixedly connected to the bottom of the support seat (6) via a heat conducting plate. The inner wall of the support seat (6) is fixedly connected to a sealing box (63), and a paraffin phase change material is arranged in the sealing box (63). The bottom of the sealing box (63) is fixedly connected to a sleeve (64), and the sleeve (64) is connected to the sealing box (63). A push rod (65) is slidably arranged on the inner wall of the sleeve (64), and the top of the push rod (65) is fixedly connected to a piston (66). The outer wall of the piston (66) is fitted with the inner wall of the sleeve (64). A return spring (68) is sleeved on the outer wall of the push rod (65), and the bottom end of the return spring (68) is fixedly connected to the inner wall of the sleeve (64). The top of the return spring (68) is fixedly connected to the inner wall of the sleeve (64). The bottom of the piston (66) contacts the bottom of the valve body (62), the bottom end of the valve body (62) is fixedly connected to a fixing frame (67), the bottom end of the fixing frame (67) is rotatably connected to a lever (69), the end of the lever (69) is movably connected to a sliding seat (70), the top of the sliding seat (70) is fixedly connected to a valve stem (71), the top of the valve stem (71) is fixedly connected to a sealing seat (72), an air duct (73) is provided inside the valve body (62), the air duct (73) is connected to the carbon dioxide gas tank (61), an air outlet pipe (74) is provided on the valve body (62), and the sealing seat (72) is provided to seal the air duct connected to the air outlet pipe (74). The air outlet pipe (74) is connected to the connecting pipe (15) via a high-pressure air pipe, and the connecting pipe (15) is connected to an external air pump.

2. The laser cutting device for profile cutting according to claim 1, characterized in that: A driven gear (7) is provided on the front clamping assembly, a motor (8) is fixedly connected to the inner side wall of the cutting bracket (2), a driving gear is fixedly sleeved on the output shaft of the motor (8), and the driven gear (7) is meshed with the driving gear.

3. The laser cutting device for profile cutting according to claim 2, characterized in that: The side wall of the clamping jaw (13) is fixedly connected to a stabilizing frame (16), and a stabilizing wheel is rotatably connected to the stabilizing frame (16).

4. The laser cutting device for profile cutting according to claim 3, characterized in that: The clamping jaw (13) is rotatably connected to a roller (21), a first cooling channel (22) is provided in the clamping jaw (13), a second cooling channel (23) and a plurality of equally spaced fine channels (24) are provided in the roller (21), the second cooling channel (23) is connected to the plurality of fine channels (24), a circumferential groove (25) is provided on the shaft at both ends of the roller (21), a plurality of vents (26) are provided at the circumferential groove (25) of the roller (21), the vents (26) are connected to the second cooling channel (23) and the first cooling channel (22), mounting holes (27) are provided on both sides of the clamping jaw (13), a connecting channel (28) is provided at the position of the mounting hole (27), the connecting channel (28) is perpendicular to the mounting hole (27), and the mounting hole (27) is sealed to the outer side walls of both ends of the roller (21).

5. The laser cutting device for profile cutting according to claim 4, characterized in that: The cleaning assembly comprises a fixing seat (31) fixedly connected to the bottom side wall of the stabilizing frame (16), the fixing seat (31) being located between the clamping seat (11) and the clamping claw (13), a plurality of extrusion springs (32) being fixedly connected to the bottom of the fixing seat (31), a scraper (33) being fixedly connected to the bottom end of the extrusion spring (32), a slide plate (34) being fixedly connected to the top of the scraper (33), the slide plate (34) being slidably connected to the bottom of the fixing seat (31), a through hole (35) being provided on the scraper (33), the through hole (35) being located correspondingly to the connection channel (28), the connection channel (28) and the through hole (35) being connected via a high-pressure hose, a narrow channel (36) being provided in the scraper (33), the narrow channel (36) being connected to the through hole (35), and a side wall of the bottom end of the scraper (33) being arranged at an angle to the outer wall of the square tube profile.

6. The laser cutting device for profile cutting according to claim 3, characterized in that: The front clamping assembly further comprises a connecting seat (42), the rotating seat (9) is fixedly connected to the side wall of the driven gear (7), the rotating seat (9) is rotatably sleeved on the outer side wall of the connecting seat (42), the end of the connecting seat (42) is fixedly connected to a connecting sleeve (43), the connecting sleeve (43) is fixedly connected to the clamping seat (11), the outer side wall of the connecting sleeve (43) is fixedly sleeved with two incomplete ring gears (44), and the inner side wall of the clamping seat (11) is fixedly connected to a connecting disk (50).

7. The laser cutting device for profile cutting according to claim 6, characterized in that: The outer wall of the connecting disk (50) is fixedly connected to four fixed shafts (45), and the four fixed shafts (45) are evenly distributed in the circumferential direction of the connecting disk (50). The fixed shafts (45) are rotatably connected to a cylinder (46). The connecting disk (50) is rotatably connected to four large gears (47) and four stable gears (48) through multiple central shafts. The stable gears (48) are meshed with the large gears (47), two relative stable gears (48) are meshed with one of the incomplete ring gears (44), and the other two relative stable gears (48) are meshed with the other incomplete ring gear (44). The eccentric shaft is fixedly connected to the large gear (47), and the eccentric shaft is rotatably connected to the end of the reciprocating shaft of the cylinder (46). The central axis of the stabilizing gear (48) passes through the connecting plate (50), and the central axis fixed sleeve of the stabilizing gear (48) is provided with a small gear (49). The inner side wall of the clamping seat (11) is fixedly connected to four slides (51), and the inner side wall of the slide (51) is slidably connected to a rack (52). Teeth and a small gear (49) are provided on both sides of the rack (52), and the rack (52) and the small gear (49) are meshed.

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