Real-time zooming structure for laser ranging point superposition

Abstract

The invention relates to the technical field of laser cutting zooming, in particular to a real-time zooming structure for laser ranging point coincidence, which comprises a mounting assembly, the outer side of the mounting assembly is slidably connected with a laser cutting head, the inner top of the laser cutting head is fixedly provided with a beam collecting lens, and the inner bottom of the laser cutting head is fixedly provided with a sealing mirror. A focusing assembly is arranged between the beam collecting lens and the sealing lens, an air guiding device is fixed to the outer side of the laser cutting head, and a point-to-point assembly is fixed to the outer side of the laser cutting head. According to the laser cutting device, laser passing through the two laser range finders is emitted to the position under the laser cutting head, the point positions of the emitted light beams of the laser range finders are located in the irradiation direction of the laser cutting light beams, and the thickness of the to-be-cut plate can be calculated through a trigonometric function in the prior art; and the focusing assembly performs automatic zooming on the light beam of the laser cutting head according to the thickness of the plate, so that the laser beam adapts to the thickness of the plate to perform high-precision cutting.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting zoom, in particular to a real-time zoom structure for laser distance measurement point overlap. Background Art

[0002] Laser cutting is a process that uses a laser beam to irradiate materials to quickly melt, vaporize or reach the ignition point. At the same time, the gas guide device uses a high-speed airflow coaxial with the beam to blow away the molten material on the material, thereby achieving cutting of the plate. When the plate thickness is thin, the laser beam needs to be focused more tightly to improve the cutting accuracy and speed. When the plate thickness increases, the laser beam needs to be properly diffused to ensure sufficient energy density to penetrate the plate. For plates of different thicknesses, the focal length needs to be adjusted to meet processing requirements;

[0003] When adjusting the focal length of the laser beam, users usually measure the thickness of the plate in advance, and then adjust the position of the focusing lens in the laser cutting head from the focusing lens according to the thickness of the plate, so as to adjust the laser beam to the focal length required for cutting the plate before starting the cutting. However, when cutting plates with uneven thickness, such as plates with reinforcing ribs fixed on one or both sides, the laser cutting head needs to cut multiple areas of different thicknesses on the plate. At this time, the pre-adjusted beam focal length cannot be adjusted in real time according to the changing thickness of the plate to adapt to the plate cutting, thereby affecting the cutting accuracy of plates with uneven thickness. Summary of the invention

[0004] The purpose of the present invention is to provide a real-time zoom structure for laser ranging point overlap to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A real-time zoom structure for laser ranging point overlap, comprising:

[0007] Installation components are installed and fixed to the external robotic arm;

[0008] A laser cutting head is slidably connected to the outside of the mounting assembly, a focusing lens is fixed to the top of the laser cutting head, and a sealing mirror is fixed to the bottom of the laser cutting head;

[0009] A focusing assembly is arranged between the focusing lens and the sealing mirror, and the focusing assembly comprises a movable ring slidably connected to the laser cutting head, a focusing mirror is fixed inside the movable ring, a rubber tube is fixed between the movable ring and the sealing mirror, and a plurality of telescopic rods are evenly fixed between the movable ring and the laser cutting head;

[0010] An air guide device is fixed on the outside of the laser cutting head and is used to drive the focus adjustment assembly to automatically change focus. The air guide device includes a main pipe and a branch pipe both of which are connected and fixed to the internal cavity of the laser cutting head;

[0011] A point-to-point component, fixed to the installation component, is used to assist the focusing component to automatically adjust the focal length according to the thickness of the plate. The point-to-point component includes a bracket. At the top and bottom of the bracket, there are fixed C-shaped seats. Inside the C-shaped seats, there is a rotating laser rangefinder, and outside the C-shaped seats, there is a fixed displacement sensor.

[0012] Furthermore: The bracket includes:

[0013] A C-shaped pipe fitting, on the outside of which there are a plurality of equally spaced round holes one penetrating through;

[0014] Two special-shaped sliding rods, both of which are slidably connected to the C-shaped pipe fitting. On the outside of the special-shaped sliding rods, there are a plurality of equally spaced round holes two. Between the round holes two and the round holes one, there are detachable and fixed bolts.

[0015] Furthermore: At the top of the C-shaped seat, there is a rotating connecting shaft fixedly connected to the laser rangefinder, and outside the C-shaped seat, there is a fixed motor for driving the connecting shaft to rotate.

[0016] Furthermore: At the top of the laser cutting head, there is a fixed fiber optic connector, and at the bottom of the fiber optic connector, there is a fixed collimating lens.

[0017] Furthermore: Inside the rubber tube, there are a plurality of uniformly fixed support rings. At both ends of the rubber tube, there are fixed fixing rings. The focusing lens and the sealing lens are respectively fixedly connected to the corresponding fixing rings.

[0018] Furthermore: The main pipe is fixedly connected and communicated with an external air source pipeline, the branch pipe is fixedly connected and communicated with the main pipe, and solenoid valves are installed and fixed on the outside of both the main pipe and the branch pipe.

[0019] Furthermore: The installation component includes:

[0020] A guide rail;

[0021] A moving block, slidably connected to the guide rail, and the moving block is fixedly installed with the laser cutting head;

[0022] An installation seat for fixedly installing the guide rail to an external mechanical arm;

[0023] A connecting rod, fixed on the outside of the guide rail, for fixing the point-to-point component to the guide rail.

[0024] Furthermore: Inside the guide rail, there is a rotating lead screw threadedly engaged with the moving block, and at one end of the guide rail, there is a fixed motor for driving the lead screw to rotate.

[0025] Furthermore: At the bottom of the laser cutting head, there is a fixed nozzle, and outside the laser cutting head, there is a fixedly installed chassis.

[0026] Furthermore, a movable top end of the telescopic rod is in contact with a pressure-sensitive element fixed to the laser cutting head, and a pressure sensor electrically connected to the pressure-sensitive element is fixed inside the chassis.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. A bracket is arranged on the outside of the laser cutting head. The top and bottom of the bracket are rotated with laser rangefinders. A displacement sensor is installed on one side of the laser rangefinder. The light beams on the two laser rangefinders are irradiated from the bottom and bottom of the plate to the surface of the plate at an angle, and the point where the laser beam irradiates the plate is directly below the nozzle of the laser cutting head (refer to the instruction manual). Figure 2 ), the laser rangefinder can directly measure the distance values ​​of h1 and h2. According to the known distance value c between the laser rangefinder and the laser cutting head, the distances between the two displacement sensors and the plate cutting position can be calculated using the existing trigonometric functions, which are e and b respectively. Combined with the distances a and d between the two displacement sensors and the ground, the thickness f (f=daeb) of the plate cutting position can be measured, so that the thickness of the plate can be measured when the laser cutting head moves to different positions on the surface of the plate. The focusing component automatically adjusts the focal length of the laser beam inside the laser cutting head according to the thickness data, so that the laser beam adapts to the thickness of the plate for high-precision cutting, which is beneficial to improving the accuracy of laser cutting of plates with uneven thickness.

[0029] 2. By connecting a fixed branch pipe outside the main pipe of the air guide device, the branch pipe can transport air to the space between the sealing mirror and the focusing mirror. The high-pressure air drives the movable ring outside the focusing mirror to slide upward along the laser cutting head, thereby reducing the distance between the focusing mirror and the focusing lens, achieving the effect of automatically adjusting the focal length of the laser beam, eliminating the need for manual adjustment of the position of the focusing mirror, and improving the efficiency of laser beam regulation;

[0030] Stop the main pipe from conveying air, open the solenoid valves on the outside of the main pipe and the branch pipe, so that the high-pressure air between the focusing mirror and the focusing lens can be transported to the nozzle position through the branch pipe and the main pipe in turn to blow away the hot-melt material, thereby realizing the secondary use of the air previously used to adjust the focal length of the laser beam. When the high-pressure air is discharged from the space between the focusing mirror and the focusing lens, the air pressure in the space decreases, and the movable ring that was originally moved upward can move down with the focusing mirror under the action of the resetting elastic force of the telescopic rod, thereby realizing flexible adjustment of the focal length of the laser beam.

[0031] 3. By disposing a pressure-sensitive element of a pressure sensor on the top surface of the movable end of a telescopic rod, when the movable ring moves the focusing lens up and down to change the focal length of the light beam, the thrust of the movable ring pressing the telescopic rod upward will change. The pressure-sensitive element of the pressure sensor can sense the magnitude of the thrust received by the end of the telescopic rod. When the thrust detected by the pressure sensor is large, it means that the movable ring moves the focusing lens upward. When the thrust detected by the pressure sensor is small, it means that the movable ring moves the focusing lens downward. The focal length value of a focusing lens can be marked according to different thrust values, so that peripheral equipment can know the focal length value of the laser beam according to the pressure indication of the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 3 It is a schematic diagram of the cutting state structure of the present invention combined with the processing table 2;

[0035] Figure 4 It is a schematic diagram of the structure of the installation components in the present invention;

[0036] Figure 5 It is a schematic diagram of the point-to-point component structure in the present invention;

[0037] Figure 6 It is a schematic diagram of the internal and external structure of the laser cutting head in the present invention;

[0038] Figure 7 The present invention Figure 6 A schematic diagram of the partially enlarged structure at center A;

[0039] Figure 8 It is a schematic diagram of the internal structure of the rubber tube in the present invention.

[0040] In the figure: 100, mounting assembly; 110, guide rail; 111, lead screw; 112, motor; 120, moving block; 130, mounting seat; 140, connecting rod; 200, laser cutting head; 210, fiber optic connector; 211, collimating lens; 220, beam focusing lens; 230, sealing mirror; 240, nozzle; 250, chassis; 260, pressure sensitive element; 300, focusing assembly; 310, movable ring; 311, focusing lens; 320, rubber tube; 321, support ring; 322, fixing ring; 330, telescopic rod; 400, air guiding device; 410, main pipe; 420, branch pipe; 500, point-to-point assembly; 510, bracket; 511, C-shaped pipe fitting; 512, special-shaped sliding rod; 520, C-shaped seat; 521, displacement sensor; 522, motor; 530, laser rangefinder; 600, processing table 1; 610, support leg; 620, bottom beam; 630, top beam; 700, processing table 2; 800, double-sided reinforced plate body; 900, single-sided reinforced plate body. Specific implementation mode

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment 1, please refer to Figure 1 - Figure 8 , in the embodiment of the present invention, a real-time zoom structure for laser ranging point coincidence includes a mounting assembly 100 fixedly installed with an external robotic arm. A laser cutting head 200 is slidably connected to the outside of the mounting assembly 100. A beam focusing lens 220 is fixed to the inner top of the laser cutting head 200, and a sealing mirror 230 is fixed to the inner bottom of the laser cutting head 200. There is a focusing assembly 300 between the beam focusing lens 220 and the sealing mirror 230. The focusing assembly 300 includes a movable ring 310 slidably connected to the laser cutting head 200. A focusing lens 311 is fixed inside the movable ring 310. A rubber tube 320 is fixed between the movable ring 310 and the sealing mirror 230. A plurality of telescopic rods 330 are evenly fixed between the movable ring 310 and the laser cutting head 200. An air guiding device 400 is fixed to the outside of the laser cutting head 200. The air guiding device 400 includes a main pipe 410 and a branch pipe 420 both fixedly connected to the inner cavity of the laser cutting head 200. A point-to-point assembly 500 is fixed to the outside of the laser cutting head 200. The point-to-point assembly 500 includes a bracket 510. C-shaped seats 520 are fixed to both the top and bottom of the bracket 510. A laser rangefinder 530 is rotatably mounted inside the C-shaped seat 520, and a displacement sensor 521 is fixed to the outside of the C-shaped seat 520.

[0043] Specifically, by connecting the branch pipe 420 to the outside of the main pipe 410 of the air guiding device 400, the branch pipe 420 can deliver air to the space between the focusing lens 311 and the sealing lens 230. The high-pressure air can drive the movable ring 310 to move the focusing lens 311 towards the converging lens 220, realizing automatic adjustment of the focal length of the laser beam and improving the efficiency of laser beam zoom adjustment. In addition, when the high-pressure air between the focusing lens 311 and the sealing lens 230 reversely regulates the beam focal length, the high-pressure air can be discharged to the nozzle 240 position of the laser cutting head 200 through the branch pipe 420 and the main pipe 410 to blow away the molten material during cutting, which is beneficial to improving the utilization rate of the air inside the air guiding device 400. By arranging two laser rangefinders 530 and a displacement sensor 521 up and down on one side of the laser cutting head 200, the lasers of the two laser rangefinders 530 are both emitted towards directly below the laser cutting head 200 and the emission beam points of the laser rangefinders 530 fall on the irradiation direction of the laser cutting beam. Combining the measurement values of the laser rangefinders 530 and the measurement values of the displacement sensor 521 and using the existing trigonometric functions of technology, the thickness of the plate to be cut can be calculated. The focusing assembly 300 then automatically zooms the beam of the laser cutting head 200 according to the thickness of the plate, thereby realizing high-precision cutting of the laser beam adapting to the thickness of the plate, which is beneficial to improving the precision of cutting plates with uneven thickness.

[0044] As Figure 1 and Figure 5 shown, in this embodiment, the bracket 510 includes a U-shaped pipe fitting 511. A plurality of first round holes are penetrated through the outside of the U-shaped pipe fitting 511 at equal intervals.异形滑杆512 is slidably inserted at both ends of the U-shaped pipe fitting 511. A plurality of second round holes are provided at equal intervals on the outside of the special-shaped slide bar 512. A bolt is detachably fixed between the second round hole and the first round hole. One end of the special-shaped slide bar 512背离匚形管件511 is fixedly connected to the connecting rod 140 on the mounting assembly 100.

[0045] In this embodiment, the two special-shaped slide bars 512 are separated by the U-shaped pipe fitting 511, so that there is a gap between the two special-shaped slide bars 512. This gap satisfies that the entire bracket 510 can move to the outside of the plate during the cutting movement of the laser cutting head 200, and enables the two laser rangefinders 530 and the displacement sensor 521 to be symmetrically distributed up and down, indirectly measuring the distance between the laser rangefinder and the cutting position of the plate, which is convenient for calculating the thickness of the plate.

[0046] In this embodiment, when the laser cutting head 200 needs to move with the support 510 to the middle of a larger-sized plate for cutting, the C-shaped pipe fitting 511 can be slid in a direction away from the special-shaped sliding rod 512 in advance, and then a bolt is inserted into the round holes one and two between the C-shaped pipe fitting 511 and the special-shaped sliding rod 512, and the nut on the bolt is tightened to adjust and fix the support 510 to be longer, so that the support 510 meets the requirements for cutting plates of different sizes.

[0047] As Figure 5 shown, in this embodiment, a connecting shaft fixedly connected to the laser rangefinder 530 is rotatably mounted on the top of the C-shaped seat 520, and a motor 522 for driving the connecting shaft to rotate is fixedly mounted on the outside of the C-shaped seat 520. When it is necessary to adjust the laser irradiation direction of the laser rangefinder 530 to the surface position of the plate directly below the corresponding laser cutting head 200, the motor 522 can be used to drive the connecting shaft to rotate, and the connecting shaft drives the laser rangefinder 530 to rotate, so as to adjust the laser irradiation direction of the laser rangefinder 530.

[0048] As Figure 6 shown, in this embodiment, an optical fiber connector 210 is fixedly mounted on the top of the laser cutting head 200, and a collimating lens 211 is fixedly mounted on the bottom of the optical fiber connector 210. The optical fiber connector 210 introduces the laser of the external optical fiber into the laser cutting head 200. The laser first passes through the collimating lens 211 and converges into a laser beam under the correction of the collimating lens 211. Then the laser beam passes through the beam collimating lens 220, and its diameter decreases under the beam collimating and adjusting effects of the beam collimating lens 220. Finally, it is focused on the workpiece to be cut under the action of the focusing lens 311. As the laser cutting head 200 moves to perform laser cutting on the plate, the beam collimation and focusing of this part of the laser are prior arts, and the detailed working principle will not be elaborated.

[0049] As Figure 6 shown, in this embodiment, the main pipe 410 is fixedly connected and communicated with the external air source pipeline, and the branch pipe 420 is fixedly connected and communicated with the main pipe 410. Solenoid valves are fixedly mounted on the outside of both the main pipe 410 and the branch pipe 420. By closing the solenoid valve on the branch pipe 420 and opening the solenoid valve on the main pipe 410, the external air source pipeline can be used to deliver air to the main pipe 410, and the air sprays high-temperature molten matter through the nozzle 240 to assist the laser cutting head 200 in performing laser cutting.

[0050] In this embodiment, when high-pressure air is needed to adjust the position of the focusing lens 311, the solenoid valve on the branch pipe 420 is opened to allow the branch pipe 420 to transport air to the space between the focusing lens 311 and the sealing lens 230. As the air is continuously injected, the air pressure pushes the movable ring 310 to move the focusing lens 311 upward, thereby shortening the focal length between the focusing lens 311 and the focusing lens 220. Then, the solenoid valve on the branch pipe 420 is opened to allow the high-pressure air in the above space to be discharged along the branch pipe 420. In the process of reducing the air pressure in the space, the reset elastic force of the telescopic rod 330 will drive the movable ring 310 to move the focusing lens 311 downward, thereby increasing the focal length between the focusing lens 311 and the focusing lens 220. The telescopic rod 330 is a spring telescopic rod 330 of the prior art, which contracts in length when squeezed and gradually extends in length when released.

[0051] like Figure 1 , Figure 6 and Figure 7 As shown, in this embodiment, a nozzle 240 is fixed at the bottom of the laser cutting head 200, and the nozzle 240 is convenient for blowing and laser cutting. A chassis 250 is installed and fixed on the outside of the laser cutting head 200, and a movable top end of a telescopic rod 330 is abutted against a pressure-sensitive element 260 fixed to the laser cutting head 200, and a pressure sensor electrically connected to the pressure-sensitive element 260 is fixed inside the chassis 250.

[0052] In this embodiment, when the movable ring 310 moves upward with the focusing lens 311, the movable ring 310 will squeeze the telescopic rod 330 upward, the squeezing force of the top end of the telescopic rod 330 on the pressure sensitive element 260 will increase, and the indication of the pressure sensor will become larger. Conversely, when the movable ring 310 moves downward with the focusing lens 311, the indication of the pressure sensor will become smaller. When designing the equipment, different pressure indications can correspond to different focal length values, so that the user can indirectly know the focal length value according to the different pressure indications.

[0053] In this embodiment, in order to improve the accuracy of the pressure indication results, pressure sensitive elements 260 can be installed at the movable ends of multiple telescopic rods 330. When the pressure indications transmitted to the pressure sensors by the multiple pressure sensitive elements 260 are the same or within the allowable error range, it indicates that the pressure indication results are accurate. Conversely, if the pressure indications transmitted to the pressure sensors by the multiple pressure sensitive elements 260 are significantly different, it indicates that the pressure indication results are inaccurate.

[0054] Embodiment 2, based on embodiment 1, in order to fix the point-to-point component 500 on the outside of the laser cutting head 200, the point-to-point component 500 can measure the thickness of the plate at the cutting position below the laser cutting head 200 in real time, and also to adjust the distance between the laser cutting head 200 and the plate.

[0055] like Figure 4As shown, in this embodiment, the installation component 100 includes a guide rail 110, a moving block 120 is slidably connected inside the guide rail 110, the moving block 120 is fixed to the laser cutting head 200, a screw rod 111 is rotatably connected to the moving block 120 inside the guide rail 110, a motor 112 for driving the screw rod 111 to rotate is fixed at one end of the guide rail 110, a mounting base 130 for fixing the guide rail 110 to an external device connected to a robotic arm is fixed on the outside of the guide rail 110, and a connecting rod 140 for fixing the point-to-point component 500 to the guide rail 110 is fixed on the outside of the guide rail 110.

[0056] Specifically, the external robotic arm is fixed to the mounting base 130, and the robotic arm moves with the guide rail 110 to achieve synchronous movement of the laser cutting head 200 and the point-to-point component 500, so as to facilitate the laser cutting head 200 to move to different positions to cut the plate. When the laser cutting head 200 needs to be adjusted to different positions above the plate, the motor 112 drives the screw rod 111 to rotate forward and reverse so that the moving block 120 screwed thereto can slide up and down along the guide rail 110, thereby realizing the sliding adjustment of the laser cutting head 200 to different positions on the outside of the guide rail 110.

[0057] like Figure 2 As shown, in this embodiment, the two laser rangefinders 530 are arranged on one side of the laser cutting head 200 to prevent the debris and broken plates that fall during the cutting process from falling onto the laser rangefinder 530. The two laser rangefinders 530 can measure the distance values ​​of e and b regardless of the position of the laser cutting head 200, and combine the values ​​of d and a measured by the displacement sensor 521 to indirectly calculate the value of f, f=daeb.

[0058] Embodiment 3, based on embodiment 1, is to prevent the high-pressure air molecules from interacting with the laser cutting light beam, causing the laser energy to attenuate.

[0059] like Figure 6 and Figure 8 As shown, in this embodiment, a plurality of support rings 321 are evenly fixed inside the rubber tube 320, fixing rings 322 are fixed at both ends of the rubber tube 320, and the focusing lens 311 and the sealing lens 230 are fixedly connected to the fixing rings 322 at corresponding positions respectively.

[0060] Specifically, when air is transported between the focusing lens 311 and the sealing lens 230, the rubber tube 320 can protect the laser beam inside the rubber tube 320 to prevent the air from contacting the beam. The rubber tube 320 is initially in a folded state and can adaptively stretch and lengthen when the movable ring 310 moves up and down. The support ring 321 supports the inside of the rubber tube 320 to prevent the rubber tube 320 from being crushed by the high-pressure air.

[0061] In the present invention:

[0062] Refer to the instruction manual Figure 3 The present application can be used in conjunction with the prior art bevel gear processing table 2 700, provided that the bottom surface of the plate is flat, the top thickness is uneven, the distance g between the plate and the ground is constant, and the thickness of the plate is f=dge. A laser rangefinder 530 and a displacement sensor 521 can be installed to measure the thickness of the plate, and then the focal length of the cutting laser can be adjusted according to the thickness of the plate.

[0063] Refer to the instruction manual Figure 1 When the thickness of the top and bottom surfaces of the plate are uneven, the existing processing table 600 can be used to clamp and fix the plate from both ends. When fixing, the bottom beam 620 and the top beam 630 are fastened to fix the plate by bolts, and then two laser rangefinders 530 and displacement sensors 521 are installed through the bracket 510 to assist in measuring the thickness of the plate. At this time, the thickness of the plate f = daeb, and then the focal length of the cutting laser is adjusted according to the thickness of the plate.

[0064] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0065] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A real-time zoom structure for laser ranging point overlap, characterized in that: Including: An installation component (100), fixedly installed with an external robotic arm; A laser cutting head (200), slidably connected to the outside of the installation component (100). A beam convergence lens (220) is fixed to the inner top of the laser cutting head (200), and a sealing mirror (230) is fixed to the inner bottom of the laser cutting head (200); A focusing component (300), arranged between the beam convergence lens (220) and the sealing mirror (230). The focusing component (300) includes a movable ring (310) slidably connected to the laser cutting head (200). A focusing lens (311) is fixed inside the movable ring (310). A rubber tube (320) is fixed between the movable ring (310) and the sealing mirror (230). A plurality of telescopic rods (330) are evenly fixed between the movable ring (310) and the laser cutting head (200); An air guiding device (400), fixed to the outside of the laser cutting head (200), used to drive the automatic zooming of the focusing component (300). The air guiding device (400) includes a main pipe (410) and a branch pipe (420) both fixedly connected to the inner cavity of the laser cutting head (200); A point-to-point component (500), fixed to the installation component (100), used to assist the focusing component (300) to automatically adjust the focal length according to the thickness of the plate. The point-to-point component (500) includes a bracket (510). C-shaped seats (520) are fixed to both the top and bottom of the bracket (510). A laser rangefinder (530) is rotatably arranged inside the C-shaped seat (520), and a displacement sensor (521) is fixed to the outside of the C-shaped seat (520).

2. The real-time zoom structure for laser ranging point overlap according to claim 1, characterized in that: The bracket (510) includes: A C-shaped pipe fitting (511), with a plurality of circular holes one evenly penetrating through the outside of the C-shaped pipe fitting (511); Two special-shaped sliding rods (512), both slidably connected to the C-shaped pipe fitting (511). A plurality of circular holes two are evenly arranged on the outside of the special-shaped sliding rod (512). Bolts are detachably fixed between the circular holes two and the circular holes one.

3. The real-time zoom structure for laser ranging point overlap according to claim 1, characterized in that: A connecting shaft fixedly connected to the laser rangefinder (530) is rotatably arranged on the top of the C-shaped seat (520), and a motor (522) for driving the rotation of the connecting shaft is fixed to the outside of the C-shaped seat (520).

4. The real-time zoom structure for laser ranging point overlap according to claim 1, characterized in that: An optical fiber connector (210) is fixed to the top of the laser cutting head (200), and a collimating lens (211) is fixed to the bottom of the optical fiber connector (210).

5. The real-time zoom structure for laser ranging point overlap according to claim 1, characterized in that: A plurality of support rings (321) are evenly fixed inside the rubber tube (320). Fixed rings (322) are fixed to both ends of the rubber tube (320). The focusing lens (311) and the sealing mirror (230) are respectively fixedly connected to the fixed rings (322) at corresponding positions.

6. The real-time zoom structure for laser ranging point overlap according to claim 1, characterized in that: The main pipe (410) is fixedly connected to an external air source pipeline, the branch pipe (420) is fixedly connected to the main pipe (410), and solenoid valves are installed and fixed on the outside of both the main pipe (410) and the branch pipe (420).

7. The real-time zoom structure for laser ranging point overlap according to claim 1, characterized in that: The installation component (100) includes: A guide rail (110); A moving block (120), slidably connected to the guide rail (110), and the moving block (120) is fixedly installed with the laser cutting head (200); An installation seat (130), used to fixedly install the guide rail (110) to an external robotic arm; The connecting rod (140) is fixed on the outside of the guide rail (110) and is used to fix the point-to-point assembly (500) to the guide rail (110).

8. The real-time zoom structure for laser ranging point overlap according to claim 7, characterized in that: A screw rod (111) is rotatably disposed inside the guide rail (110) and is screw-connected to the moving block (120). A motor (112) for driving the screw rod (111) to rotate is fixed to one end of the guide rail (110).

9. The real-time zoom structure for laser ranging point overlap according to claim 1, characterized in that: A nozzle (240) is fixed at the bottom of the laser cutting head (200), and a cabinet (250) is installed and fixed on the outer side of the laser cutting head (200).

10. The real-time zoom structure for laser ranging point overlap according to claim 9, characterized in that: A movable top end of a telescopic rod (330) is in contact with a pressure-sensitive element (260) fixed to the laser cutting head (200), and a pressure sensor electrically connected to the pressure-sensitive element (260) is fixed inside the chassis (250).

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