Laser cutting device for hot-rolled coiled plate machining

Abstract

The invention relates to the technical field of laser cutting, and provides a laser cutting device for hot-rolled coil plate machining, which comprises a bracket, supports are uniformly fixed at the bottom end of the bracket, and feeding rollers are uniformly and rotatably connected to the inner side of the bottom of the bracket. By arranging an ejection structure and starting a first servo motor, the first servo motor drives a first threaded rod to rotate, the first threaded rod drives movable plates at the two ends of the first threaded rod to move reversely, the two movable plates get close to each other, a hinge rod hinged to the top ends of the movable plates drives a supporting rod to move upwards, and the supporting rod drives a supporting plate to move; the supporting plate moves upwards from the interval of the feeding rollers, the hot-rolled coil plate placed at the top ends of the feeding rollers can be jacked up, the hot-rolled coil plate is separated from the feeding rollers, the hot-rolled coil plate is conveyed through the feeding rollers, the hot-rolled coil plate is prevented from being scratched in the conveying process, and meanwhile the conveying efficiency is improved. And the damage of the feeding roller caused by over-high temperature of the hot-rolled coil plate during laser cutting is avoided.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and in particular to a laser cutting device for processing hot-rolled coils. Background Technology

[0002] In recent years, laser cutting has been gradually applied to hot-rolled coil processing due to its advantages such as narrow kerf, small thermal deformation, high processing precision, and good flexibility. Laser cutting equipment for hot-rolled coil processing is an important component of this process. To address this, patent CN118180661B discloses a steel plate laser cutting device, including a base, a shaped cover plate, a chip removal unit, an asynchronous motion unit, a synchronous motion unit, a clamping unit, and a clamping torque adjustment unit. Existing multi-head laser cutters typically lack the ability to freely change the synchronous or asynchronous trajectory of the steel plate during cutting, and the waste generated during cutting requires frequent cleaning, indirectly affecting cutting efficiency. However, the steel plate laser cutting device provided by this invention, with its chip removal unit, asynchronous motion unit, synchronous motion unit, clamping unit, and clamping torque adjustment unit working together, can achieve asynchronous cutting of both ends of the steel plate, as well as synchronous cutting of the steel plate along the same trajectory of the first and second guide rails. This avoids the cumbersome problem of cleaning up cutting waste from the cutting machine, effectively improving both cutting and cleaning efficiency. The aforementioned steel plate laser cutting device performs cutting operations using two sets of laser cutting heads. However, during the laser cutting process, the local temperature of the plate will rise sharply, which can easily damage the conveyor rollers. The comb rollers can easily scratch the bottom of the plate during the conveying process. In addition, errors during the cutting process can cause the laser cutting head to accidentally touch the plate, which can easily cause the laser cutting head to be squeezed and deformed, affecting its service life. Summary of the Invention

[0003] The purpose of this invention is to provide a laser cutting device for hot-rolled coil processing, which solves the defects of existing laser cutting devices for hot-rolled coil processing, such as easy miscutting, scratching of the plate, and insufficient protection measures for the laser cutting head.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a laser cutting device for processing hot-rolled coils, including a support frame; The bottom end of the bracket is uniformly fixed with a support, the inner side of the bottom of the bracket is uniformly rotatably connected with a feeding roller, the inner side of the bottom of the support is provided with a chip collection box, and the top of the chip collection box is provided with an ejection structure. Both sides of the top of the bracket are provided with translation structures, and the top of each translation structure is fixed with a movable structure. A protective structure is fixed on one side of each movable structure. The ejection structure includes fixed plates on both sides above the chip collection box. A first servo motor is fixedly installed on the outer wall of one side of the fixed plate. Movable plates are provided on the inner side of the fixed plates. A first threaded rod passes through the middle of each movable plate. A first sliding rod passes through both ends of each movable plate. Hinged rods are hinged to both sides of the top of each movable plate. A support rod is hinged to one end of each hinged rod. A support plate is uniformly fixed to the top of each support rod.

[0005] Preferably, both ends of the fixed plate are fixedly connected to the inner sidewall of the support, one end of the first threaded rod extends into the interior of the fixed plate and is rotatably connected to the fixed plate, the other end of the first threaded rod passes through the fixed plate and is fixedly connected to the output end of the first servo motor, the first threaded rod and the movable plate are threadedly connected, and the thread directions at both ends of the first threaded rod are opposite.

[0006] Preferably, both ends of the first slide rod are fixedly connected to the inner sidewall of the fixed plate, the first slide rod and the movable plate are slidably connected, the support plate and the feeding roller are staggered, and the top of the support plate is comb-shaped.

[0007] Preferably, the translation structure includes a first movable groove formed on both sides of the top of the bracket. A second servo motor is fixedly installed on the outer wall of the bracket at one end of the first movable groove. A support column is provided above each of the first movable grooves. The bottom end of each support column extends into the interior of the first movable groove. A second threaded rod passes through the bottom of the support column on one side of the bracket, and a second sliding rod passes through the bottom of the support column on the other side of the bracket.

[0008] Preferably, one end of the second threaded rod extends into the interior of the bracket and is rotatably connected to the bracket, the other end of the second threaded rod extends into the exterior of the bracket and is fixedly connected to the output end of the second servo motor, the second threaded rod and the support column are threadedly connected, both ends of the second slide rod are fixedly connected to the inner sidewall of the bracket, and the second slide rod and the support column are slidably connected.

[0009] Preferably, the movable structure includes a crossbeam fixed to the top of the support column, a second movable groove is provided on one side of the inside of the crossbeam, a movable block is provided inside the second movable groove, a third threaded rod passes through the inside of the movable block, and a third servo motor is fixedly installed at one end of the crossbeam.

[0010] Preferably, one end of the third threaded rod extends into the interior of the crossbeam and is rotatably connected to the crossbeam, while the other end of the third threaded rod extends into the exterior of the crossbeam and is fixedly connected to the output end of the third servo motor.

[0011] Preferably, the protective structure includes a fixed seat disposed on one side of the crossbeam, a slide rail fixed on the side of the fixed seat away from the crossbeam, a slider disposed on the outer side of the slide rail, a buffer assembly fixed at the bottom end of the slider, the buffer assembly including a connecting seat fixed to the bottom end of the slider, a steering ball rotatably connected to the bottom end of the connecting seat, a connecting rod fixed to the bottom end of the steering ball, a buffer seat disposed below the connecting rod, a movable groove opened inside the buffer seat, a limit plate fixed to the bottom end of the connecting rod extending into the movable groove, a return spring sleeved on the outer side of the connecting seat, a connecting plate fixed to the bottom end of the buffer seat, a laser cutting head fixedly installed at the bottom end of the connecting plate, a moving assembly fixed on the outer wall of the fixed seat above the slider, the moving assembly including a chassis fixed to the outer wall of the fixed seat above the slider, a transmission gear disposed on one side inside the chassis, a drive gear meshing with one side of the transmission gear inside the chassis, a fourth threaded rod passing through the inside of the transmission gear, pressure bearings disposed at both ends of the transmission gear, and a fourth servo motor fixedly installed on one side of the top of the chassis.

[0012] Preferably, one side of the top of the fixed base is fixedly connected to one end of the movable block, the slider and the slide rail are slidably connected, the outer diameter of the connecting rod is smaller than the inner diameter of the movable groove, the top end of the return spring is fixedly connected to the bottom end of the slider, and the bottom end of the return spring is fixedly connected to the top end of the connecting plate.

[0013] Preferably, the transmission gear is threadedly connected to the fourth threaded rod, the side of the pressure bearing away from the transmission gear abuts against the inner wall of the chassis, both ends of the fourth threaded rod extend to the outside of the chassis, the bottom end of the fourth threaded rod is fixedly connected to the top end of the slider, and the output end of the fourth servo motor extends to the inside of the chassis and is fixedly connected to the top end of the drive gear.

[0014] The laser cutting device for processing hot-rolled coils provided by this invention has the following advantages: With the ejection structure in place, the first servo motor is activated, which drives the first threaded rod to rotate. This causes the threaded rod to move the movable plates at both ends of the first threaded rod in the opposite direction. The two movable plates move closer to each other and, through the hinge rod at their top, drive the support rod to move upward. This causes the support rod to move the support plate, which moves upward from the gap between the feeding rollers. This lifts the hot-rolled coil placed at the top of the feeding rollers, separating the hot-rolled coil from the feeding rollers. The hot-rolled coil is then conveyed by the feeding rollers, preventing scratches on the hot-rolled coil during conveying. At the same time, it prevents the feeding rollers from being damaged due to excessively high temperatures during laser cutting of the hot-rolled coil. Furthermore, the top of the support plate is comb-shaped, which reduces the contact area between the support plate and the hot-rolled coil, reducing the risk of miscutting during laser cutting. At the same time, it increases the contact area between the hot-rolled coil and the air, accelerating the heat dissipation of the hot-rolled coil and improving the cutting quality. With a protective structure in place, the fourth servo motor is activated. The fourth servo motor drives the transmission gear to rotate through the drive gear. Under the action of the pressure bearing, the transmission gear drives the fourth threaded rod to move, causing the fourth threaded rod to drive the slider to slide on one side of the slide rail. This method controls the up and down movement of the laser cutting head, making its movement relatively smooth and stable, avoiding severe vibration that could affect the service life of the laser cutting head. At the same time, it prevents the laser cutting head from shaking during movement and cutting, improving the flatness of the cut surface. Furthermore, during the cutting operation, when the side wall of the laser cutting head accidentally comes into contact with a foreign object, the connecting rod will drive the steering ball to rotate inside the connecting seat, thereby changing the angle of the laser cutting head, reducing the impact force on the laser cutting head, and extending the service life of the laser cutting head. Furthermore, during the cutting operation, when the bottom of the laser cutting head accidentally comes into contact with a foreign object, the buffer seat will move upward, causing the connecting rod to move the limiting plate inside the movable groove, so that the laser cutting head can retract in time, reducing the impact force on the laser cutting head and extending the service life of the laser cutting head. Furthermore, under the elastic force of the return spring, the laser cutting head can quickly return to its initial position after being freed from the pressure of the foreign object, shortening maintenance time and improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a rear view diagram of the present invention; Figure 3 This is a schematic diagram of the first perspective of the front cross-section of the present invention; Figure 4 This is a schematic diagram of the second perspective of the main cross-section of the present invention; Figure 5 This is a side cross-sectional view of the present invention; Figure 6 This is a schematic front view of the ejection structure of the present invention; Figure 7 This is a bottom view of the ejector structure of the present invention; Figure 8 This is a schematic front view of the protective structure of the present invention; Figure 9 This is a schematic front cross-sectional view of the protective structure of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of point A in the middle; Figure 11 For the present invention Figure 9 Enlarged diagram of point B in the middle.

[0016] The reference numerals in the diagram are explained as follows: 1. Bracket; 11. Support; 2. Chip collection box; 3. Ejection structure; 31. Fixed plate; 32. First servo motor; 33. Movable plate; 34. First threaded rod; 35. First slide rod; 36. Hinge rod; 37. Support rod; 38. Support plate; 4. Feed roller; 5. Translation structure; 51. First moving groove; 52. Second servo motor; 53. Support column; 54. Second threaded rod; 55. Second slide rod; 6. Moving structure; 61. Crossbeam; 62. Second moving groove; 63. Moving block; 64. 65. Third servo motor; 7. Protective structure; 71. Fixed seat; 72. Slide rail; 73. Slider; 74. Buffer assembly; 741. Connecting seat; 742. Steering ball; 743. Connecting rod; 744. Buffer seat; 745. Movable groove; 746. Limiting plate; 747. Return spring; 75. Connecting plate; 76. Laser cutting head; 77. Moving assembly; 771. Chassis; 772. Transmission gear; 773. Pressure bearing; 774. Drive gear; 775. Fourth servo motor; 776. Fourth threaded rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-11 The present invention provides a laser cutting device for processing hot-rolled coils, including a support 1.

[0019] Reference Figures 3-7As shown, a support 11 is evenly fixed to the bottom of the bracket 1. A feeding roller 4 is evenly rotatably connected to the inner side of the bottom of the bracket 1. A chip collection box 2 is provided on the inner side of the bottom of the support 11. An ejection structure 3 is provided above the chip collection box 2. The ejection structure 3 includes a fixed plate 31 on both sides above the chip collection box 2. A first servo motor 32 is fixedly installed on the outer wall of one side of the fixed plate 31. A movable plate 33 is provided on the inner side of the fixed plate 31. A first threaded rod 34 passes through the middle of each movable plate 33. A first sliding rod 35 passes through both ends of each movable plate 33. A hinge rod 36 is hinged to both sides of the top of the movable plate 33. A support rod 3 is hinged to one end of each hinge rod 36. 7. Support plates 38 are evenly fixed to the top of support rod 37. Both ends of fixed plate 31 are fixedly connected to the inner sidewall of support 11. One end of first threaded rod 34 extends into the interior of fixed plate 31 and is rotatably connected to fixed plate 31. The other end of first threaded rod 34 passes through fixed plate 31 and is fixedly connected to the output end of first servo motor 32. First threaded rod 34 and movable plate 33 are threadedly connected. The thread directions at both ends of first threaded rod 34 are opposite. Both ends of first slide rod 35 are fixedly connected to the inner sidewall of fixed plate 31. First slide rod 35 and movable plate 33 are slidably connected. Support plate 38 and feeding roller 4 are staggered. The top of support plate 38 is comb-shaped.

[0020] The first servo motor 32 is started, which drives the first threaded rod 34 to rotate. This causes the first threaded rod 34 to move the movable plates 33 at both ends in opposite directions. The two movable plates 33 move closer to each other and drive the support rod 37 upward through the hinge rod 36 at its top. This causes the support rod 37 to move the support plate 38. The support plate 38 moves upward from the interval of the feeding roller 4, lifting the hot-rolled coil placed at the top of the feeding roller 4. This separates the hot-rolled coil from the feeding roller 4, allowing the feeding roller 4 to transport the hot-rolled coil. This prevents scratches on the hot-rolled coil during transport and also prevents damage to the feeding roller 4 due to excessive temperature during laser cutting. The top of the support plate 38 is comb-shaped, which reduces the contact area between the support plate 38 and the hot-rolled coil, reducing the risk of accidental cutting during laser cutting. At the same time, it increases the contact area between the hot-rolled coil and the air, accelerating the heat dissipation of the hot-rolled coil.

[0021] Reference Figures 3-5As shown, translation structures 5 are provided on both sides of the top of the bracket 1. The translation structure 5 includes a first moving groove 51 opened on both sides of the top of the bracket 1. A second servo motor 52 is fixedly installed on the outer wall of the bracket 1 at one end of the first moving groove 51. A support column 53 is provided above the first moving groove 51. The bottom end of the support column 53 extends into the interior of the first moving groove 51. A second threaded rod 54 passes through the bottom of the support column 53 on one side of the bracket 1. A second sliding rod 55 passes through the bottom of the support column 53 on the other side of the bracket 1. One end of the second threaded rod 54 extends into the interior of the bracket 1 and is rotatably connected to the bracket 1. The other end of the second threaded rod 54 extends into the exterior of the bracket 1 and is fixedly connected to the output end of the second servo motor 52. The second threaded rod 54 and the support column 53 are threadedly connected. Both ends of the second sliding rod 55 are fixedly connected to the inner side wall of the bracket 1. The second sliding rod 55 and the support column 53 are slidably connected.

[0022] Start the second servo motor 52, which will drive the second threaded rod 54 to rotate, causing the second threaded rod 54 to move the support column 53 at the top of the bracket 1, thereby enabling the device to complete the longitudinal cutting operation.

[0023] Reference Figures 3-5 As shown, each of the translation structures 5 has a fixed moving structure 6 at its top. The moving structure 6 includes a crossbeam 61 fixed to the top of the support column 53. A second moving groove 62 is provided on one side of the inside of the crossbeam 61. A moving block 63 is provided inside the second moving groove 62. A third threaded rod 64 passes through the inside of the moving block 63. A third servo motor 65 is fixedly installed at one end of the crossbeam 61. One end of the third threaded rod 64 extends into the inside of the crossbeam 61 and is rotatably connected to the crossbeam 61. The other end of the third threaded rod 64 extends into the outside of the crossbeam 61 and is fixedly connected to the output end of the third servo motor 65.

[0024] Start the third servo motor 65, which drives the third threaded rod 64 to rotate, causing the third threaded rod 64 to drive the moving block 63 to move inside the second moving groove 62, thereby enabling the device to complete the transverse cutting operation.

[0025] Reference Figure 1 and Figures 8-11As shown, a protective structure 7 is fixed to one side of the movable structure 6. The protective structure 7 includes a fixed seat 71 disposed on one side of the crossbeam 61. A slide rail 72 is fixed to the side of the fixed seat 71 away from the crossbeam 61. A slider 73 is disposed on the outer side of the slide rail 72. A buffer assembly 74 is fixed to the bottom end of the slider 73. The buffer assembly 74 includes a connecting seat 741 fixed to the bottom end of the slider 73. A steering ball 742 is rotatably connected to the bottom end of the connecting seat 741. A connecting rod 743 is fixed to the bottom end of the steering ball 742. A buffer seat 743 is disposed below the connecting rod 743. 44. A movable groove 745 is provided inside the buffer seat 744. The bottom end of the connecting rod 743 extends into the movable groove 745 and is fixed with a limit plate 746. A return spring 747 is sleeved on the outer side of the connecting seat 741. A connecting plate 75 is fixed to the bottom end of the buffer seat 744. A laser cutting head 76 is fixedly installed at the bottom end of the connecting plate 75. A moving assembly 77 is fixed on the outer wall of the fixed seat 71 above the slider 73. The moving assembly 77 includes a housing 771 fixed to the outer wall of the fixed seat 71 above the slider 73. One side of the housing 771 is provided with A transmission gear 772 is provided. Inside the housing 771, a drive gear 774 is meshed with one side of the transmission gear 772. A fourth threaded rod 776 passes through the inside of the transmission gear 772. Pressure bearings 773 are provided at both ends of the transmission gear 772. A fourth servo motor 775 is fixedly installed on one side of the top of the housing 771. One side of the top of the fixed base 71 is fixedly connected to one end of the moving block 63. The slider 73 and the slide rail 72 are slidably connected. The outer diameter of the connecting rod 743 is smaller than the inner diameter of the movable groove 745. The top of the return spring 747... The bottom end of the slide block 73 is fixedly connected to the bottom end of the return spring 747, the bottom end of the connecting plate 75 is fixedly connected to the top end of the return spring 747, the transmission gear 772 is threadedly connected to the fourth threaded rod 776, the side of the pressure bearing 773 away from the transmission gear 772 abuts against the inner wall of the housing 771, both ends of the fourth threaded rod 776 extend to the outside of the housing 771, the bottom end of the fourth threaded rod 776 is fixedly connected to the top end of the slide block 73, and the output end of the fourth servo motor 775 extends into the inside of the housing 771 and is fixedly connected to the top end of the drive gear 774.

[0026] The fourth servo motor 775 is activated. The fourth servo motor 775 drives the transmission gear 772 to rotate via the drive gear 774. Under the action of the pressure bearing 773, the transmission gear 772 drives the fourth threaded rod 776 to move, causing the fourth threaded rod 776 to drive the slider 73 to slide on one side of the slide rail 72. This method controls the up-and-down movement of the laser cutting head 76, making its movement relatively smooth and stable, avoiding severe vibrations that could affect the service life of the laser cutting head 76. It also prevents the laser cutting head 76 from shaking during cutting operations. During the cutting operation, the sidewall of the laser cutting head 76 does not come into contact with foreign objects. In the event of accidental contact, the connecting rod 743 will drive the steering ball 742 to rotate inside the connecting seat 741, causing the angle of the laser cutting head 76 to change. When the bottom of the laser cutting head 76 accidentally contacts a foreign object, the buffer seat 744 will move upward, causing the connecting rod 743 to drive the limiting plate 746 to move inside the movable groove 745, allowing the laser cutting head 76 to retract in time, reducing the impact force on the laser cutting head 76. Under the elastic force of the return spring 747, the laser cutting head 76 can quickly return to its initial position after being squeezed by the foreign object, shortening maintenance time.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser cutting device for processing hot-rolled coils, comprising a support (1); Its features are: The bottom end of the bracket (1) is uniformly fixed with a support (11), and the inner side of the bottom of the bracket (1) is uniformly rotatably connected with a feeding roller (4). The inner side of the bottom of the support (11) is provided with a chip collection box (2), and the top of the chip collection box (2) is provided with an ejection structure (3). The top of the bracket (1) is provided with translation structure (5) on both sides, and the top of the translation structure (5) is fixed with a moving structure (6), and a protective structure (7) is fixed on one side of the moving structure (6). The ejection structure (3) includes a fixed plate (31) on both sides above the chip collection box (2). A first servo motor (32) is fixedly installed on the outer wall of one side of the fixed plate (31). A movable plate (33) is provided on the inner side of the fixed plate (31). A first threaded rod (34) passes through the middle position of the movable plate (33). A first sliding rod (35) passes through both ends of the movable plate (33). A hinge rod (36) is hinged to both sides of the top of the movable plate (33). A support rod (37) is hinged to one end of the hinge rod (36). A support plate (38) is uniformly fixed to the top of the support rod (37).

2. The laser cutting device for processing hot-rolled coils according to claim 1, characterized in that: Both ends of the fixed plate (31) are fixedly connected to the inner sidewall of the support (11). One end of the first threaded rod (34) extends into the interior of the fixed plate (31) and is rotatably connected to the fixed plate (31). The other end of the first threaded rod (34) passes through the fixed plate (31) and is fixedly connected to the output end of the first servo motor (32). The first threaded rod (34) and the movable plate (33) are threadedly connected. The thread directions at both ends of the first threaded rod (34) are opposite.

3. The laser cutting device for processing hot-rolled coils according to claim 1, characterized in that: Both ends of the first slide rod (35) are fixedly connected to the inner sidewall of the fixed plate (31). The first slide rod (35) and the movable plate (33) are slidably connected. The support plate (38) and the feeding roller (4) are staggered. The top of the support plate (38) is comb-shaped.

4. The laser cutting device for processing hot-rolled coils according to claim 1, characterized in that: The translation structure (5) includes a first moving groove (51) opened on both sides of the top of the bracket (1). A second servo motor (52) is fixedly installed on the outer wall of the bracket (1) at one end of the first moving groove (51). A support column (53) is provided above the first moving groove (51). The bottom end of the support column (53) extends into the interior of the first moving groove (51). A second threaded rod (54) passes through the bottom of the support column (53) on one side of the bracket (1), and a second sliding rod (55) passes through the bottom of the support column (53) on the other side of the bracket (1).

5. The laser cutting device for processing hot-rolled coils according to claim 4, characterized in that: One end of the second threaded rod (54) extends into the interior of the bracket (1) and is rotatably connected to the bracket (1). The other end of the second threaded rod (54) extends into the exterior of the bracket (1) and is fixedly connected to the output end of the second servo motor (52). The second threaded rod (54) and the support column (53) are threadedly connected. Both ends of the second slide rod (55) are fixedly connected to the inner sidewall of the bracket (1). The second slide rod (55) and the support column (53) are slidably connected.

6. The laser cutting device for processing hot-rolled coils according to claim 4, characterized in that: The movable structure (6) includes a crossbeam (61) fixed to the top of the support column (53). A second movable groove (62) is provided on one side inside the crossbeam (61). A movable block (63) is provided inside the second movable groove (62). A third threaded rod (64) passes through the inside of the movable block (63). A third servo motor (65) is fixedly installed at one end of the crossbeam (61).

7. The laser cutting device for processing hot-rolled coils according to claim 6, characterized in that: One end of the third threaded rod (64) extends into the interior of the crossbeam (61) and is rotatably connected to the crossbeam (61), while the other end of the third threaded rod (64) extends into the exterior of the crossbeam (61) and is fixedly connected to the output end of the third servo motor (65).

8. The laser cutting device for processing hot-rolled coils according to claim 6, characterized in that: The protective structure (7) includes a fixed seat (71) disposed on one side of the crossbeam (61). A slide rail (72) is fixed on the side of the fixed seat (71) away from the crossbeam (61). A slider (73) is disposed on the outer side of the slide rail (72). A buffer assembly (74) is fixed at the bottom end of the slider (73). The buffer assembly (74) includes a connecting seat (741) fixed to the bottom end of the slider (73). A steering ball (742) is rotatably connected to the bottom end of the connecting seat (741). A connecting rod (743) is fixed at the bottom end of the steering ball (742). A buffer seat (744) is disposed below the connecting rod (743). A movable groove (745) is opened inside the buffer seat (744). The bottom end of the connecting rod (743) extends into the interior of the movable groove (745) and is fixed with a limit plate (746). The connecting seat (741) A return spring (747) is sleeved on the outside. A connecting plate (75) is fixed at the bottom of the buffer seat (744). A laser cutting head (76) is fixedly installed at the bottom of the connecting plate (75). A moving component (77) is fixed on the outer wall of the fixed seat (71) above the slider (73). The moving component (77) includes a chassis (771) fixed on the outer wall of the fixed seat (71) above the slider (73). A transmission gear (772) is provided on one side inside the chassis (771). A drive gear (774) is meshed on one side of the transmission gear (772) inside the chassis (771). A fourth threaded rod (776) passes through the inside of the transmission gear (772). Pressure bearings (773) are provided at both ends of the transmission gear (772). A fourth servo motor (775) is fixedly installed on one side of the top of the chassis (771).

9. The laser cutting device for processing hot-rolled coils according to claim 8, characterized in that: The top side of the fixed seat (71) is fixedly connected to one end of the moving block (63), the slider (73) and the slide rail (72) are slidably connected, the outer diameter of the connecting rod (743) is smaller than the inner diameter of the movable groove (745), the top end of the return spring (747) is fixedly connected to the bottom end of the slider (73), and the bottom end of the return spring (747) is fixedly connected to the top end of the connecting plate (75).

10. A laser cutting device for processing hot-rolled coils according to claim 8, characterized in that: The transmission gear (772) is threadedly connected to the fourth threaded rod (776). The side of the pressure bearing (773) away from the transmission gear (772) abuts against the inner wall of the housing (771). Both ends of the fourth threaded rod (776) extend to the outside of the housing (771). The bottom end of the fourth threaded rod (776) is fixedly connected to the top end of the slider (73). The output end of the fourth servo motor (775) extends into the inside of the housing (771) and is fixedly connected to the top end of the drive gear (774).

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