Laser cutting device for cutting bent pipe

Abstract

The invention belongs to the technical field of laser cutting, and discloses a laser cutting device for bent pipe cutting. A clamping mechanism used for clamping the bent pipe fitting is arranged on the workbench. A cutting mechanism is arranged above the workbench and comprises a horizontally-placed fixing shaft, the fixing shaft is located on any side of the cutting mechanism, a base plate is fixed to the end, close to the clamping mechanism, of the fixing shaft, the plane where the base plate is located is parallel to the central axis of the fixing shaft, and a circular through groove is formed in the base plate. A first notch groove is formed in the end, away from the fixing shaft, of the base plate, the first notch groove is in through connection with the circular through groove, the first barrel groove penetrates through the edge, close to the clamping mechanism side, of the base plate, and a rotating ring coaxial with the circular through groove is rotationally connected to the base plate; in addition, the laser cutting device is particularly suitable for cutting machining of the special-shaped bent pipe fittings with the central axes of all the sections not located in the same plane.

Description

Technical Field

[0001] The invention belongs to the technical field of laser cutting, and in particular relates to a laser cutting device for cutting curved pipes. Background Art

[0002] In the field of industrial manufacturing, the cutting process of bent pipes is a common and important process, especially in the pipeline system, automobile manufacturing, aerospace and other industries. The precise cutting of bent pipes directly affects the quality and performance of the products. With the continuous development of laser cutting technology, its advantages in cutting accuracy, speed and applicability are gradually emerging. Laser cutting technology uses a high-energy-density laser beam to locally heat the material, causing it to melt or vaporize rapidly, thereby achieving high-precision cutting.

[0003] During laser cutting, it is usually necessary to drive the cutting piece to rotate, or drive the laser cutting gun to rotate around the piece to be cut, so that the laser cutting gun can completely cut its peripheral wall; but when laser cutting is performed on curved pipes, especially when cutting special-shaped curved pipes whose central axes of each section are not in the same plane, if the curved pipe is driven to rotate for cutting, the curved central axis and special-shaped structure of the curved pipe make it easy for the center of gravity to shift and vibrate during the rotation process, resulting in a decrease in cutting accuracy. Therefore, it is usually not possible to drive the curved pipe to rotate for cutting; if the laser cutting gun is driven to rotate, the curved shape and special-shaped structure of the curved pipe will limit the rotation of the mechanical arm connected to the laser cutting gun, resulting in the fact that it can only be rotated and cut around the cutting part by manually holding the laser cutting gun; therefore, there is a problem in the prior art that it is not convenient to perform laser cutting on curved pipes, especially it is inconvenient to cut special-shaped curved pipes whose central axes of each section are not in the same plane. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a laser cutting device for cutting bent pipes, which solves the problem in the prior art that it is inconvenient to laser cut bent pipes, especially the inconvenience in cutting special-shaped bent pipes whose central axes of each section are not in the same plane.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A laser cutting device for cutting curved pipes, comprising a workbench;

[0007] A clamping mechanism for clamping the bent pipe fitting is provided on the workbench;

[0008] A cutting mechanism is provided above the workbench, and the cutting mechanism includes a horizontally placed fixed shaft, the fixed shaft is located on either side of the cutting mechanism, a substrate is fixed to one end of the fixed shaft close to the clamping mechanism, the plane where the substrate is located is placed in parallel with the central axis of the fixed shaft, a circular through groove is provided on the substrate, a first notch groove is provided on the end of the substrate away from the fixed shaft, the first notch groove is connected through the circular through groove, the first barrel groove passes through the edge of the substrate close to the clamping mechanism, a rotating ring coaxially placed with the circular through groove is rotatably connected to the substrate, a laser cutting gun is connected to the inner peripheral wall of the rotating ring, the central axis of the laser emitting end of the laser cutting gun is coaxially placed with the fixed shaft, and the central axis of the laser emitting end of the laser cutting gun passes through the central axis of the rotating ring, a second notch groove is provided on the rotating ring, and the laser emitting end of the laser cutting gun is horizontally facing the second notch groove, a driving unit is provided on the substrate, the driving unit is used to drive the rotating shaft to rotate around its own central axis, and a rotating part is connected to the other end of the fixed shaft, and the rotating part is used to drive the fixed shaft to rotate around its own central axis;

[0009] A three-axis adjustment mechanism is provided on the workbench, and the cutting mechanism is connected to the three-axis adjustment mechanism through a rotating part, and the three-axis adjustment mechanism is used to drive the cutting mechanism to adjust its position in a three-dimensional space;

[0010] Evenly distributed tooth grooves are provided on the outer peripheral wall of the rotating ring;

[0011] The driving unit includes a pair of rotating shafts, both of which are rotatably connected to the base plate, and both of which are fixedly sleeved with first gears, and both of the first gears are meshed with the outer tooth grooves of the rotating ring;

[0012] When the second notch groove rotates to the middle of the two first gears, the two first gears are meshed with the outer tooth grooves of the rotating ring;

[0013] The driving unit also includes a first rotating motor, any rotating shaft is connected to the output end of the first rotating motor, the first rotating motor is fixedly mounted on the base plate, the rotating shafts are fixedly sleeved with second gears, and an annular synchronous belt is sleeved between the two second gears;

[0014] The cutting mechanism also includes a fixed disk, which is located at one end of the laser cutting gun away from the second notch groove, and the fixed disk is fixedly connected to the laser cutting gun. A telescopic rod is fixed to the end of the fixed disk away from the second notch groove, and the telescopic rod is coaxially placed with the laser emitting end of the laser cutting gun. The other end of the telescopic rod is fixed to the inner peripheral wall of the rotating ring, and a spring is sleeved on the telescopic rod. One end of the spring is fixed to the fixed disk, and the other end of the spring is fixed to the inner peripheral wall of the rotating ring. An ear plate is fixedly sleeved on the peripheral wall of the laser cutting gun, and a pair of symmetrically placed limit pins are fixed to the ear plate away from the end of the telescopic rod, and the limit pins are coaxially placed with the telescopic rod. The two limit pins are respectively located on both sides of the laser cutting gun, and the distance between the end of the laser cutting gun away from the telescopic rod and the ear plate is smaller than the distance between the end of the limit pin away from the telescopic rod and the ear plate;

[0015] When the telescopic rod is fully extended, the distance between the stop pin and the position where the telescopic rod is fixed by the rotating ring is greater than the radius of the inner peripheral wall of the rotating ring;

[0016] The rotating part includes a second rotating motor, and an output end of the second rotating motor is connected to an end of the fixed shaft away from the substrate;

[0017] A circular groove coaxially arranged with the rotating ring is provided on the base plate, a sliding member is fixed on the rotating ring, and the sliding member is slidably engaged in the circular groove;

[0018] The three-axis adjustment mechanism includes a first electric slide rail fixedly mounted on the workbench, the first electric slide rail is coaxially placed with the fixed axis, a first slider is slidably connected to the first electric slide rail, a horizontally placed second electric slide rail is fixed to the first slider, a second slider is slidably connected to the second electric slide rail, a third electric slide rail placed vertically upward is fixed to the second slider, and a third slider is slidably connected to the third electric slide rail;

[0019] The second rotating motor is fixedly mounted on the third sliding block;

[0020] A horizontally placed slideway is provided on the workbench;

[0021] The clamping mechanism includes a screw rod rotatably connected to a slide groove, the screw rod is placed horizontally, and a pair of symmetrically placed clamps are slidably clamped in the slide groove, the upper ends of the clamps extend above the workbench, and the spiral directions of the screw threads on both sides of the symmetry plane of the two clamps are opposite, the clamps are sleeved on the screw rod and threadably connected to the screw rod, an installation groove is opened on the workbench, a third rotating motor is fixedly installed in the installation groove, and the output end of the third rotating motor is connected to either end of the screw rod.

[0022] Beneficial effects of the present invention:

[0023] 1. The bent pipe is clamped and fixed by a clamping mechanism, the inclination angle of the base plate and the rotating ring is adjusted by a rotating part, and the first notch groove and the second notch groove are passed through the bent pipe by cooperating with a three-axis adjustment mechanism until the part of the bent pipe to be cut is on the inner side of the rotating ring, and then the laser cutting gun is turned on, and the rotating ring is driven to rotate by a driving unit, so that the laser cutting gun rotates around the cutting part to complete the cutting operation, thereby facilitating the automatic laser cutting of the bent pipe, and the present application is particularly suitable for the cutting processing of special-shaped bent pipes whose central axes of each section are not in the same plane;

[0024] At the same time, during laser cutting, the inclination angle of the substrate and the rotating ring can be adjusted through the rotating part according to actual needs, so as to adjust the inclination angle of the end surface of the cut end;

[0025] 2. The two first gears are synchronously driven to rotate during cutting. During the rotation of the rotating ring, at least one first gear in the present application is meshed with the outer tooth groove of the rotating ring. Through the arrangement of the two first gears, the stable driving effect on the rotating ring during the cutting process can be achieved, and the first rotating motor, the second gear and the annular synchronous belt are matched to achieve synchronous driving of the two first gears;

[0026] 3. Through the coordinated arrangement of the fixed plate, telescopic rod, spring, ear plate and limit pin, during cutting processing, the three-axis adjustment mechanism is used to drive the base plate and the laser cutting gun close to the part of the bent pipe to be cut, and at least any limit pin is squeezed and contacted with the peripheral wall of the bent pipe. During the subsequent rotation of the rotating ring, the telescopic rod and the spring can be adaptively telescoped and adjusted according to the change in the distance between the peripheral wall of the bent pipe and the inner peripheral wall of the rotating ring. At any time during the cutting process, at least one limit pin is in contact with the peripheral wall of the bent pipe, thereby effectively controlling the distance between the laser emitting end of the laser cutting gun and the peripheral wall of the bent pipe to be kept within a certain range, and it can be applied to laser cutting processing of bent pipes of various specifications with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall structure of the present invention from different viewing angles;

[0030] Figure 3 It is a partial structural schematic diagram of the third sliding block of the present invention;

[0031] Figure 4 It is a schematic diagram of the cutting mechanism structure of the present invention;

[0032] Figure 5 It is a partial structural schematic diagram of the telescopic rod of the present invention;

[0033] Figure 6 The present invention Figure 5 A schematic diagram of the partially enlarged structure at center A;

[0034] Figure 7 It is a partial structural schematic diagram of the circular through groove of the present invention;

[0035] Figure 8 It is a partial structural schematic diagram of the rotating ring of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0037] like Figures 1 to 8 As shown, a laser cutting device for cutting curved pipes comprises a workbench 100;

[0038] The workbench 100 is provided with a clamping mechanism for clamping the bent pipe 500;

[0039] A cutting mechanism is provided above the workbench 100, and the cutting mechanism includes a horizontally placed fixed shaft 301, the fixed shaft 301 is located on either side of the cutting mechanism, a substrate 302 is fixed to one end of the fixed shaft 301 close to the clamping mechanism, the plane where the substrate 302 is located is placed parallel to the central axis of the fixed shaft 301, a circular through groove 3021 is provided on the substrate 302, a first notch groove 3022 is provided on the end of the substrate 302 away from the fixed shaft 301, the first notch groove 3022 is connected to the circular through groove 3021, the first barrel groove runs through the edge of the substrate 302 close to the clamping mechanism, and a cylindrical groove 302 is rotatably connected to the substrate 302 and is placed coaxially with the circular through groove 3021. The rotating ring 303 has a laser cutting gun 304 connected to the inner peripheral wall of the rotating ring 303. The central axis of the laser emitting end of the laser cutting gun 304 is coaxially placed with the fixed shaft 301, and the central axis of the laser emitting end of the laser cutting gun 304 passes through the central axis of the rotating ring 303. The rotating ring 303 is provided with a second notch groove 3031. The laser emitting end of the laser cutting gun 304 is horizontally oriented to the second notch groove 3031. The substrate 302 is provided with a driving unit, and the driving unit is used to drive the rotating ring 303 to rotate around its own central axis. The other end of the fixed shaft 301 is connected to a rotating part, and the rotating part is used to drive the fixed shaft 301 to rotate around its own central axis.

[0040] A three-axis adjustment mechanism 400 is provided on the workbench 100, and the cutting mechanism is connected to the three-axis adjustment mechanism 400 through a rotating part. The three-axis adjustment mechanism 400 is used to drive the cutting mechanism to adjust its position in a three-dimensional space;

[0041] When in use, the bent pipe member 500 is clamped and fixed by the clamping mechanism, and the second notch groove 3031 is rotated to a position where it overlaps with the first notch groove 3022, and then the cutting mechanism is driven by the three-axis adjustment mechanism 400 to adjust the position, and the fixed shaft 301 is driven by the rotating part to drive the substrate 302 to rotate, and the inclination angle of the substrate 302 and the rotating ring 303 is adjusted, and the first notch groove 3022 and the second notch groove 3031 are made to pass through the bent pipe member 500 in conjunction with the three-axis adjustment mechanism 400 until the part to be cut of the bent pipe member 500 is on the inner side of the rotating ring 303, and then the laser cutting gun 304 is turned on, and the rotating ring 303 is driven to rotate by the driving unit, so that the laser cutting gun 304 rotates around the cutting part to complete the cutting operation, thereby achieving the purpose of facilitating automatic laser cutting of the bent pipe member 500, and the present application is particularly suitable for cutting processing of special-shaped bent pipe members 500 whose central axes of each section are not in the same plane;

[0042] At the same time, when the rotating ring 303 is sleeved on the outside of the part to be cut of the bent pipe 500, the fixed shaft 301 can be driven by the rotating part to drive the base plate 302 to rotate according to actual needs, and the inclination angle of the base plate 302 and the rotating ring 303 can be adjusted to adjust the inclination angle of the end face of the cut end.

[0043] In order to ensure stable driving of the rotating ring 303 during the cutting process, evenly distributed tooth grooves are provided on the outer peripheral wall of the rotating ring 303;

[0044] The driving unit includes a pair of rotating shafts 305, each of which is rotatably connected to the base plate 302, and each of which is fixedly sleeved with a first gear 306, and each of the two first gears 306 is meshed with the outer tooth groove of the rotating ring 303;

[0045] When the second notch groove 3031 rotates to the middle of the two first gears 306, the two first gears 306 are meshed with the outer tooth grooves of the rotating ring 303;

[0046] During cutting, the two first gears 306 are synchronously driven to rotate, and the rotating ring 303 is driven to rotate by the first gears 306. During the rotation process, at least one first gear 306 in the present application is engaged with the outer tooth groove of the rotating ring 303. Through the setting of the two first gears 306, a stable driving effect on the rotating ring 303 can be achieved during the cutting process.

[0047] In order to facilitate the synchronous driving of the two first gears 306 to rotate, the driving unit also includes a first rotating motor 307, any rotating shaft 305 is connected to the output end of the first rotating motor 307, the first rotating motor 307 is fixedly installed on the base plate 302, and the rotating shaft 305 is fixedly sleeved with a second gear 308, and an annular synchronous toothed belt 309 is sleeved between the two second gears 308; by turning on the first rotating motor 307, the output end of the first rotating motor 307 drives the corresponding rotating shaft 305, and through the setting of the second gear 308 and the annular synchronous toothed belt 309, the two rotating shafts 305 drive the two first gears 306 to rotate synchronously.

[0048] During the cutting process, in order to ensure the best cutting state, it is usually necessary to keep the distance change between the laser cutting gun 304 and the peripheral wall of the curved pipe 500 within a certain range. In order to achieve the above purpose, the cutting mechanism also includes a fixed plate 310, which is located at the end of the laser cutting gun 304 away from the second notch groove 3031, and the fixed plate 310 is fixedly connected to the laser cutting gun 304. The end of the fixed plate 310 away from the second notch groove 3031 is fixed with a telescopic rod 311, and the telescopic rod 311 is connected to the laser of the laser cutting gun 304. The transmitting end is placed coaxially, the other end of the telescopic rod 311 is fixed to the inner peripheral wall of the rotating ring 303, a spring 312 is sleeved on the telescopic rod 311, one end of the spring 312 is fixed to the fixed disk 310, and the other end of the spring 312 is fixed to the inner peripheral wall of the rotating ring 303, an ear plate 313 is fixedly sleeved on the peripheral wall of the laser cutting gun 304, and a pair of symmetrically placed limit pins 314 are fixed on the ear plate 313 away from the end of the telescopic rod 311, and the limit pins 314 are coaxially placed with the telescopic rod 311, and the two limit pins 314 are respectively located at the laser cutting The laser cutting gun 304 is located on both sides of the cutting gun 304, and the distance between the end of the laser cutting gun 304 away from the telescopic rod 311 and the ear plate 313 is smaller than the distance between the end of the limit pin 314 away from the telescopic rod 311 and the ear plate 313; the laser cutting gun 304 is fixed to the inner peripheral wall of the rotating ring 303 by the arrangement of the telescopic rod 311 and the fixing plate 310; during the cutting process, the base plate 302 and the laser cutting gun 304 are driven to approach the part to be cut of the bent pipe 500 by the three-axis adjustment mechanism 400, and at least any one of the limit pins 314 is close to the peripheral wall of the bent pipe 500. During the subsequent rotation of the rotating ring 303, the telescopic rod 311 and the spring 312 can be adaptively telescopically adjusted according to the change in the distance between the peripheral wall of the curved pipe 500 and the inner peripheral wall of the rotating ring 303. At any time during the cutting process, at least one limit pin 314 is in contact with the peripheral wall of the curved pipe 500, thereby effectively controlling the distance between the laser emitting end of the laser cutting gun 304 and the peripheral wall of the curved pipe 500 to be maintained within a certain range, and can be applied to the laser cutting of curved pipes 500 of various specifications with different diameters;

[0049] Preferably, in the present application, the telescopic rod 311 may be a multi-stage telescopic rod 311, which can ensure that the telescopic rod 311 has sufficient effective telescopic space.

[0050] When the telescopic rod 311 is fully extended, the distance from the end of the telescopic rod 311 to the position of the rotating ring 303 where the telescopic rod 311 is fixed is greater than the radius of the inner wall of the rotating ring 303; thereby effectively ensuring that at least one of the limit pins 314 contacts the wall of the bent pipe 500 during the cutting rotation process.

[0051] The rotating part includes a second rotating motor 315 , and the output end of the second rotating motor 315 is connected to the end of the fixed shaft 301 away from the base plate 302 ; by turning on the second rotating motor 315 , the fixed shaft 301 and the base plate 302 can be driven to rotate and adjust.

[0052] In order to improve the rotation stability of the rotating ring 303, a circular groove 3023 is opened on the base plate 302 and is placed coaxially with the rotating ring 303. A sliding member 3032 is fixed on the rotating ring 303, and the sliding member 3032 is slidably engaged in the circular groove 3023. Through the coordinated arrangement of the circular groove 3023 and the sliding member 3032, the rotation stability of the rotating ring 303 is improved, and the rotating ring 303 is prevented from being separated from the base plate 302.

[0053] The three-axis adjustment mechanism 400 includes a first electric slide rail 401 fixedly mounted on the workbench 100, the first electric slide rail 401 is coaxially placed with the fixed axis 301, a first slider 402 is slidably connected to the first electric slide rail 401, a horizontally placed second electric slide rail 403 is fixed to the first slider 402, a second slider 404 is slidably connected to the second electric slide rail 403, a third electric slide rail 405 placed vertically upward is fixed to the second slider 404, and a third slider 406 is slidably connected to the third electric slide rail 405;

[0054] The second rotating motor 315 is fixedly mounted on the third sliding block 406;

[0055] By cooperating with the first electric slide rail 401 , the second electric slide rail 403 and the third electric slide rail 405 , the third slider 406 is driven to drive the cutting mechanism to adjust its position in a three-dimensional space, so as to cut different parts of the bent pipe 500 .

[0056] A horizontally placed slide 101 is provided on the workbench 100;

[0057] The clamping mechanism includes a screw rod 201 rotatably connected to the slide slot 101, the screw rod 201 is placed horizontally, and a pair of symmetrically placed clamping plates 202 are slidably clamped in the slide slot 101, and the upper ends of the clamping plates 202 extend above the workbench 100, and the screw threads of the screw rod 201 on both sides of the symmetry plane of the two clamping plates 202 are in opposite directions, and the clamping plates 202 are sleeved on the screw rod 201 and threadedly connected to the screw rod 201, and a mounting groove is provided on the workbench 100, and a third rotating motor 203 is fixedly installed in the mounting groove, and the output end of the third rotating motor 203 is connected to either end of the screw rod 201; by turning on the third rotating motor 203, the screw rod 201 is driven by the third rotating motor 203, and the screw 201 drives the two clamping plates 202 to perform thread transmission, thereby achieving the purpose of driving the two clamping plates 202 to move closer to or away from each other, so as to achieve the clamping and fixing of the bent pipe 500;

[0058] In the present application, the chute 101 can be horizontally opened on the workbench 100, and there is no requirement for the specific axis direction of the chute 101;

[0059] Preferably, a rubber pad or a silicone pad is provided on one side of the two clamps 202 close to each other to prevent the clamps 202 from excessively clamping the bent pipe 500 and causing deformation of the bent pipe 500. At the same time, the provision of the rubber pad or the silicone pad can increase the contact area with the bent pipe 500 after clamping and improve the stability of clamping.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A laser cutting device for cutting a curved pipe, comprising a workbench (100), characterized in that: A clamping mechanism for clamping the bent pipe member (500) is provided on the workbench (100); A cutting mechanism is provided above the workbench (100), the cutting mechanism comprising a horizontally placed fixed shaft (301), the fixed shaft (301) being located on either side of the cutting mechanism, a substrate (302) being fixed to one end of the fixed shaft (301) close to the clamping mechanism, the plane where the substrate (302) is located being placed in parallel with the central axis of the fixed shaft (301), a circular through groove (3021) being provided on the substrate (302), a first notch groove (3022) being provided on one end of the substrate (302) away from the fixed shaft (301), the first notch groove (3022) being connected to the circular through groove (3021), the first cylindrical groove passing through the edge of the substrate (302) close to the clamping mechanism, a coaxial axis with the circular through groove (3021) being rotatably connected to the substrate (302) A rotating ring (303) is placed, a laser cutting gun (304) is connected to the inner peripheral wall of the rotating ring (303), the central axis of the laser emitting end of the laser cutting gun (304) is coaxially placed with the fixed shaft (301), and the central axis of the laser emitting end of the laser cutting gun (304) passes through the central axis of the rotating ring (303), a second notch groove (3031) is opened on the rotating ring (303), and the laser emitting end of the laser cutting gun (304) is horizontally oriented to the second notch groove (3031), a driving unit is provided on the base plate (302), and the driving unit is used to drive the rotating ring (303) to rotate around its own central axis, and the other end of the fixed shaft (301) is connected to a rotating part, and the rotating part is used to drive the fixed shaft (301) to rotate around its own central axis; A three-axis adjustment mechanism (400) is provided on the workbench (100); the cutting mechanism is connected to the three-axis adjustment mechanism (400) via a rotating part; the three-axis adjustment mechanism (400) is used to drive the cutting mechanism to adjust its position in a three-dimensional space.

2. The laser cutting device for curved pipe cutting according to claim 1, characterized in that: The outer peripheral wall of the rotating ring (303) is provided with evenly distributed tooth grooves; The driving unit comprises a pair of rotating shafts (305), the rotating shafts (305) are both rotatably connected to the base plate (302), the rotating shafts (305) are both fixedly sleeved with first gears (306), and the two first gears (306) are both meshed with the outer tooth grooves of the rotating ring (303); When the second notch groove (3031) rotates to the middle of the two first gears (306), the two first gears (306) are meshed with the outer tooth grooves of the rotating ring (303).

3. The laser cutting device for curved pipe cutting according to claim 2, characterized in that: The driving unit further comprises a first rotating motor (307), any rotating shaft (305) is connected to the output end of the first rotating motor (307), the first rotating motor (307) is fixedly mounted on the base plate (302), a second gear (308) is fixedly sleeved on the rotating shaft (305), and an annular synchronous toothed belt (309) is sleeved between the two second gears (308).

4. The laser cutting device for cutting curved pipes according to claim 3, characterized in that: The cutting mechanism further comprises a fixed disk (310), the fixed disk (310) being located at one end of the laser cutting gun (304) away from the second notch groove (3031), the fixed disk (310) being fixedly connected to the laser cutting gun (304), a telescopic rod (311) being fixed to the end of the fixed disk (310) away from the second notch groove (3031), the telescopic rod (311) being coaxially arranged with the laser emitting end of the laser cutting gun (304), the other end of the telescopic rod (311) being fixed to the inner peripheral wall of the rotating ring (303), a spring (312) being sleeved on the telescopic rod (311), one end of the spring (312) being fixed to the fixed disk (310), The other end of the spring (312) is fixed to the inner peripheral wall of the rotating ring (303); an ear plate (313) is fixedly sleeved on the peripheral wall of the laser cutting gun (304); a pair of symmetrically placed limit pins (314) are fixed to the end of the ear plate (313) away from the telescopic rod (311); the limit pins (314) are coaxially placed with the telescopic rod (311); the two limit pins (314) are respectively located on both sides of the laser cutting gun (304); and the distance between the end of the laser cutting gun (304) away from the telescopic rod (311) and the ear plate (313) is smaller than the distance between the end of the limit pin (314) away from the telescopic rod (311) and the ear plate (313).

5. The laser cutting device for cutting curved pipes according to claim 4, characterized in that: When the telescopic rod (311) is fully extended, the distance from the end of the limiting pin (314) away from the telescopic rod (311) to the portion of the rotating ring (303) fixing the telescopic rod (311) is greater than the radius of the inner peripheral wall of the rotating ring (303).

6. The laser cutting device for cutting curved pipes according to claim 5, characterized in that: The rotating part comprises a second rotating motor (315), and an output end of the second rotating motor (315) is connected to an end of the fixed shaft (301) away from the base plate (302).

7. The laser cutting device for cutting curved pipes according to claim 6, characterized in that: The base plate (302) is provided with a circular groove (3023) coaxially arranged with the rotating ring (303). A sliding member (3032) is fixed on the rotating ring (303), and the sliding member (3032) is slidably engaged in the circular groove (3023).

8. The laser cutting device for cutting curved pipes according to claim 7, characterized in that: The three-axis adjustment mechanism (400) comprises a first electric slide rail (401) fixedly mounted on the workbench (100), the first electric slide rail (401) being coaxially arranged with the fixed axis (301), a first slider (402) being slidably connected to the first electric slide rail (401), a second electric slide rail (403) being horizontally arranged being fixed to the first slider (402), a second slider (404) being slidably connected to the second electric slide rail (403), a third electric slide rail (405) being vertically arranged upward being fixed to the second slider (404), and a third slider (406) being slidably connected to the third electric slide rail (405); The second rotating motor (315) is fixedly mounted on the third sliding block (406).

9. The laser cutting device for cutting curved pipes according to claim 8, characterized in that: A horizontally placed slide groove (101) is provided on the workbench (100); The clamping mechanism comprises a screw rod (201) rotatably connected to a slide groove (101), the screw rod (201) is placed horizontally, a pair of symmetrically placed clamping plates (202) are slidably clamped in the slide groove (101), the upper ends of the clamping plates (202) are extended above the workbench (100), and the screw threads of the screw rod (201) on both sides of the symmetry plane of the two clamping plates (202) are in opposite directions, the clamping plates (202) are sleeved on the screw rod (201) and are threadedly connected to the screw rod (201), and an installation groove is opened on the workbench (100), a third rotating motor (203) is fixedly installed in the installation groove, and the output end of the third rotating motor (203) is connected to either end of the screw rod (201).

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