A laser cutting machine

Abstract

The application belongs to the technical field of laser cutting, and particularly relates to a laser cutting machine, which comprises a base frame, a conveying structure arranged at the upper end of the base frame, the conveying structure being used for conveying a pipe, a cutting structure arranged at the upper end of the conveying structure, the cutting structure comprising a laser module, and the laser module being arranged at the upper end of the base frame. By arranging the pressing plate and the rack, the pipe can be moved during cutting, and the cut pipe will fall on the surface of the pressing plate. The pressure of the pipe on the pressing plate will make the trigger plate move downward by a distance, and in the moving process, the abutting block will no longer abut against the first inclined block. At this time, the return spring will release the elastic force, so that the sliding block and the trigger plate move towards the pipe. Subsequently, the abutting block will abut against the next second inclined block, and the second inclined block is the position required for the next cutting. Therefore, the automatic adjustment of the cutting position of the pipe is realized, which is very convenient.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser cutting, and particularly relates to a laser cutting machine. BACKGROUND

[0002] The laser cutting machine is an advanced processing method for realizing workpiece cutting by irradiating a workpiece with a high-power-density laser beam, blowing away molten material through a high-speed airflow coaxial with the beam, and thus achieving workpiece cutting. Since laser cutting can greatly reduce workpiece loss and improve cutting quality, thereby reducing production costs, the existing metal pipe cutting will use laser cutting.

[0003] A patent application with the publication number CN220880953U discloses a laser pipe cutting machine, which comprises a support frame, two straight rods are arranged at the top end of the support frame and two sliding groove openings are formed in the top end, two screw rods are arranged in the support frame, two first bearings are fixed to the inner side walls of the support frame, a first transmission wheel and a second transmission wheel are fixed to the two screw rods, respectively, and a top plate is fixed to the top ends of the two straight rods. The laser pipe cutting machine can arbitrarily adjust the position of the cutting head during cutting, saves time and effort, and makes the user use more convenient and efficient.

[0004] The above-mentioned scheme still has some problems in actual application. When the pipe is cut by the above-mentioned laser pipe cutting machine, the pipe needs to be moved to the required cutting position first, and then the cutting mechanism is started to cut the pipe. However, since the length of the pipe is relatively long, the pipe is generally transported during cutting. However, the pipe cannot be moved during cutting, i.e. the pipe is stopped during cutting. Therefore, the transportation and cutting efficiency is low. In order to solve this problem, the existing technology sets the cutting mechanism as movable, and the moving speed is consistent with the moving speed of the pipe. At this time, the pipe can be moved during cutting. However, after the cutting of the previous pipe is completed, the cutting mechanism needs to be moved to the next cutting position. However, the above-mentioned device cannot automatically realize this, which is very inconvenient.

[0005] Therefore, the application provides a laser cutting machine. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical scheme adopted by the present application to solve its technical problems is: a laser cutting machine, comprising a base frame, the upper end of the base frame is provided with a conveying structure, the conveying structure is used for conveying pipe, the upper end of the conveying structure is provided with a cutting structure, the cutting structure comprises a laser module, the laser module is arranged at the upper end of the base frame, the lower end of the laser module is provided with a cutting head, the lower end of the cutting structure is provided with an adjusting structure close to one end of the conveying structure; the adjusting structure comprises: a sliding rod, the sliding rod is arranged on one side of the base frame; a sliding block, the sliding block is connected with the laser module, and the sliding block is slidably connected to the surface of the sliding rod; a return spring, the return spring is sleeved on the surface of the sliding rod; a trigger plate, the trigger plate is slidably connected to one side of the sliding block; an abutting block, the abutting block is arranged at the upper end of the trigger plate; a rack, the rack is slidably connected to one side of the base frame; a first inclined block, the first inclined block is arranged at the lower end of the rack; a plurality of second inclined blocks, the second inclined blocks are arranged at the lower end of the rack.

[0008] Preferably, the conveying structure comprises a conveying roller, the conveying roller is rotatably connected to the upper end of the base frame; a driving shaft, the driving shaft is rotatably connected to the upper end of the base frame, and the arc surface of the driving shaft is connected with the conveying roller; a limiting plate, a plurality of limiting plates are arranged on the upper end of the base frame, and the pipe passes through the inside of the limiting plate; the adjusting structure further comprises: a connecting arm, the connecting arm is arranged at one end of the laser module, and the other end of the connecting arm is connected with the sliding block; a driving gear, the driving gear is arranged on the surface of the driving shaft; a first gear, the first gear is rotatably connected to the side wall of the base frame, and the first gear is engaged with the driving gear, the first gear is engaged with the rack; a sliding shaft, the sliding shaft is arranged in the sliding block, and the trigger plate is slidably connected to the surface of the sliding shaft; a compression spring, the compression spring is sleeved on the surface of the sliding shaft; a fixed shaft, the fixed shaft is arranged in the base frame; a pressing plate, the pressing plate is slidably connected to the surface of the fixed shaft, and the lower surface of the pressing plate is in contact with the trigger plate when moving; an adjusting spring, the adjusting spring is sleeved on the surface of the fixed shaft.

[0009] Preferably, the surface of the pressing plate is inclined, and the inclined surface of the pressing plate is in contact with the pipe.

[0010] Preferably, the surface of the pressing plate is provided with a limiting baffle, and the limiting baffle is in contact with the pipe.

[0011] Preferably, the second inclined block is slidably connected to the lower end of the rack.

[0012] Preferably, the lower end of the rack is provided with a fixed rod, the upper end of the second inclined block is provided with a sliding ring, and the sliding ring slides on the surface of the fixed rod, and the surface of the sliding ring is threadedly connected with a screw rod.

[0013] Preferably, the surface of one of the plurality of limiting plates is rotatably connected with a grinding roller, and the grinding roller is in contact with the pipe.

[0014] Preferably, the surface of the driving shaft is sleeved with a connecting track, the other end of the connecting track is sleeved with a second gear, the second gear is rotatably connected to the side wall of the limiting plate, one end of the grinding roller is sleeved with a connecting chain, the other end of the connecting chain is sleeved with a third gear, and the third gear is engaged with the second gear.

[0015] Preferably, one side of the plurality of limiting plates is provided with a plurality of rotating shafts, the circular arc surface of the rotating shaft is rotatably connected with a rotating arm, one end of the rotating arm is provided with an abutting sponge, and the abutting sponge is in contact with the pipe.

[0016] Preferably, the circular arc surface of the rotating shaft is sleeved with a coil spring, and the coil spring is connected with the limiting plate.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The laser cutting machine, by setting the pressing plate and the rack, when cutting, the conveying roller drives the pipe to move, and the driving gear at one end of the conveying roller also drives the rack to move synchronously, the first inclined block at the lower end of the rack drives the cutting structure to move through the abutment with the abutting block, so that the pipe can move during cutting, and the cut pipe will fall on the surface of the pressing plate, the pressure of the pipe on the pressing plate will make the trigger plate move downward by a distance, and during the movement, the abutting block will no longer abut with the first inclined block, at this time, the return spring will release the elastic force, so that the sliding block and the trigger plate move towards the pipe, then the abutting block will abut with the next second inclined block, and the second inclined block is the position required for the next cutting, so that the automatic adjustment of the cutting position of the pipe is realized, which is very convenient.

[0019] 2. The laser cutting machine, by setting the grinding roller, when the pipe is cut, the driving shaft drives the second gear to rotate through the connecting track, the second gear drives the grinding roller to rotate through the third gear, and since the pipe will rotate during cutting, the direction of rotation is opposite to that of the grinding roller, at this time, the grinding roller will polish the surface of the pipe, thereby completing the surface treatment work before cutting the pipe. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below with reference to the drawings.

[0021] Figure 1 is a perspective view of embodiment one of the present application;

[0022] Figure 2 is a front view of embodiment one of the present application;

[0023] Figure 3 is a partial view of the adjusting structure of the present application;

[0024] Figure 4 is a connection diagram of the trigger plate and the sliding block of the present application;

[0025] Figure 5 is a position diagram of the sliding block and the return spring of the present application;

[0026] Figure 6 is a position diagram of the pressing plate and the trigger plate of the present application;

[0027] Figure 7 is a connection diagram of the first inclined block and the rack of the present application;

[0028] Figure 8 is a partial enlarged view at A in Figure 7

[0029] Figure 9 is a connection diagram of the polishing roller and the driving shaft of the present application;

[0030] Figure 10 is a position diagram of the abutting sponge and the pipe;

[0031] Figure 11 is a perspective view of the abutting sponge of the present application;

[0032] In the figure: 1, base frame; 2, conveying structure; 21, conveying roller; 22, driving shaft; 23, limiting plate; 3, cutting structure; 31, laser module; 32, cutting head; 4, adjusting structure; 401, connecting arm; 402, sliding block; 403, return spring; 404, pressing plate; 405, limiting baffle; 406, abutting block; 407, first gear; 408, rack; 409, trigger plate; 410, sliding shaft; 411, compression spring; 412, sliding rod; 413, fixed shaft; 414, adjusting spring; 415, first inclined block; 416, fixed rod; 417, second inclined block; 418, sliding ring; 419, screw rod; 420, driving gear; 421, connecting track; 422, second gear; 423, third gear; 424, connecting chain; 425, polishing roller; 426, abutting sponge; 427, rotating arm; 428, rotating shaft; 429, coil spring; 5, pipe. DETAILED DESCRIPTION

[0033] ​In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0034] Example 1: Figures 1 to 11 As shown, a laser cutting machine according to an embodiment of the present invention includes a base frame 1, a conveying structure 2 is provided at the upper end of the base frame 1, the conveying structure 2 is used to convey the pipe 5, a cutting structure 3 is provided at the upper end of the conveying structure 2, the cutting structure 3 includes a laser module 31, the laser module 31 is provided at the upper end of the base frame 1, a cutting head 32 is provided at the lower end of the laser module 31, and an adjustment structure 4 is provided at the lower end of the cutting structure 3 close to the conveying structure 2; the adjustment structure 4 includes: a sliding rod 412, the sliding rod 412 is provided on one side of the base frame 1; a sliding block 402, the sliding block 402 It is connected to the laser module 31, and the sliding block 402 is slidably connected to the surface of the sliding rod 412; the return spring 403, the return spring 403 is sleeved on the surface of the sliding rod 412; the trigger plate 409, the trigger plate 409 is slidably connected to one side of the sliding block 402; the abutment block 406, the abutment block 406 is arranged at the upper end of the trigger plate 409; the rack 408, the rack 408 is slidably connected to one side of the base frame 1; the first bevel block 415, the first bevel block 415 is arranged at the lower end of the rack 408; and a plurality of second bevel blocks 417, the second bevel blocks 417 are arranged at the lower end of the rack 408.

[0035] Specifically, the scheme is a laser cutting machine, which is suitable for cutting pipe 5. During cutting, the pipe 5 is first placed on the surface of the upper end conveying structure 2 of the base frame 1, and then the conveying structure 2 is started. The conveying structure 2 will move together with the pipe 5. When the pipe 5 moves to the desired cutting position, the laser module 31 is started. The laser module 31 is internally provided with a mirror and a pump source. After starting, the pump source will provide energy to make the medium molecules or atoms in it transition to a high-energy level state. When the medium molecules or atoms in the high-energy level state randomly transition to a low-energy level, a photon will be emitted. These photons are repeatedly reflected by the two parallel mirrors, forming a photon multiplication effect. The distance between the mirrors is designed to be an integer multiple of the wavelength of the stimulated radiation to ensure that only photons in a specific direction are selected and amplified. Finally, part of the laser beam will be transmitted from one end of the cutting head 32 to form the required laser beam for cutting. Then, since the pipe 5 is also rotating, the cutting of the pipe 5 can be completed at this time. However, due to the length of the pipe 5 and the large number of cutting required, the above structure causes the pipe 5 to be unable to move during cutting. At this time, the rotation of the conveying roller 21 needs to be stopped during cutting, resulting in low efficiency of pipe 5 conveying and cutting. Therefore, the adjusting structure 4 is designed. During cutting, the rotation of the conveying roller 21 does not need to be stopped. The rack 408 is started to move. The rack 408 will move synchronously with the pipe 5. During the movement, the first inclined block 415 will abut against the abutment block 406, so that the abutment block 406 drives the sliding block 402 to move together through the trigger plate 409. Since the sliding block 402 is connected with the laser module 31, the laser module 31 will be driven at this time, so that the cutting head 32 moves synchronously with the pipe 5. After cutting is completed, the trigger plate 409 is started. The trigger plate 409 will move downward. During the movement of the trigger plate 409, the abutment block 406 will no longer abut against the first inclined block 415. At this time, the return spring 403 will release the elastic force, so that the sliding block 402 and the trigger plate 409 move towards the pipe 5. Subsequently, the abutment block 406 will abut against the next second inclined block 417, and the second inclined block 417 is the position required for cutting the pipe 5 next time. After the abutment block 406 contacts with the second inclined block 417, the return spring 403 will not push the sliding block 402 to move again due to the limitation of the second inclined block 417. The second inclined block 417 will drive the cutting structure 3 to continue to move together with the pipe 5 through the abutment block 406 at this time, so as to realize the automatic adjustment of the cutting position of the pipe 5, which is very convenient.

[0036] As Figures 1 to 6As shown, the conveying structure 2 comprises a conveying roller 21 rotatably connected to the upper end of the base frame 1, a driving shaft 22 rotatably connected to the upper end of the base frame 1, and the arc surface of the driving shaft 22 is connected with the conveying roller 21, and a plurality of limiting plates 23 are arranged on the upper end of the base frame 1, and the pipe 5 passes through the inside of the limiting plate 23. The adjusting structure 4 further comprises: a connecting arm 401 arranged at one end of the laser module 31, and the other end of the connecting arm 401 is connected with a sliding block 402; a driving gear 420 arranged on the surface of the driving shaft 22; a first gear 407 rotatably connected to the side wall of the base frame 1, and the first gear 407 is engaged with the driving gear 420, and the first gear 407 is engaged with a rack 408; a sliding shaft 410 arranged in the inside of the sliding block 402, and a trigger plate 409 is slidingly connected to the surface of the sliding shaft 410; a compression spring 411 sleeved on the surface of the sliding shaft 410; a fixed shaft 413 arranged in the inside of the base frame 1; a pressing plate 404 slidingly connected to the surface of the fixed shaft 413, and the lower surface of the pressing plate 404 is in contact with the trigger plate 409 when moving; and an adjusting spring 414 sleeved on the surface of the fixed shaft 413.

[0037] Specifically, when cutting, the driving shaft 22 rotates at this time, the driving gear 420 on the surface of the driving shaft 22 will drive the rack 408 to move through the first gear 407, and in the process of moving the rack 408, the laser module 31 will be driven, so that the cutting head 32 and the pipe 5 move synchronously, and then after cutting, the cut pipe 5 will fall on the surface of the pressing plate 404, at this time the pressing plate 404 will move downward and contact with the trigger plate 409, so that the trigger plate 409 also moves downward, and in the process of moving the trigger plate 409, the automatic adjustment of the cutting position of the pipe 5 is realized.

[0038] As shown in Figures 1 to 6 The surface of the pressing plate 404 is inclined, and the inclined surface of the pressing plate 404 is in contact with the pipe 5.

[0039] Specifically, since the pipe 5 is continuously falling on the surface of the pressing plate 404 during cutting, if the pipe 5 falls on the surface of the previous pipe 5, the collision force is easy to break the pipe 5, therefore the surface of the pressing plate 404 is inclined, when the pipe 5 falls on the surface of the pressing plate 404, it will not affect the downward movement of the pressing plate 404, and after the pipe 5 is stable, it will move to the end with lower inclination angle, so that the next pipe 5 will not collide with it.

[0040] As shown in Figures 1 to 5As shown in the figure, the surface of the pressing plate 404 is provided with a limiting baffle 405, and the limiting baffle 405 is in contact with the pipe 5.

[0041] Specifically, by setting the limiting baffle 405, when the pipe 5 falls on the surface of the pressing plate 404, the limiting baffle 405 will limit the moving direction of the pipe 5, so that the pipe 5 will not fall outside the device.

[0042] As shown in the figure, Figure 7 The second inclined block 417 is slidingly connected to the lower end of the rack 408.

[0043] Specifically, by setting the second inclined block 417 to slide at the lower end of the rack 408, the position of the second inclined block 417 at the lower end of the rack 408 can be adjusted according to the size of the pipe 5 required to be cut each time.

[0044] As shown in the figure, Figures 7 to 8 The lower end of the rack 408 is provided with a fixed rod 416, the upper end of the second inclined block 417 is provided with a sliding ring 418, and the sliding ring 418 slides on the surface of the fixed rod 416. The surface of the sliding ring 418 is threadedly connected with a screw rod 419.

[0045] Specifically, when it is necessary to adjust the position of the second inclined block 417 at the lower end of the rack 408, the screw rod 419 is rotated, and the screw rod 419 will move away from the fixed rod 416, so that the sliding ring 418 can slide on the surface of the fixed rod 416. Then, when the second inclined block 417 is adjusted to the required position, the screw rod 419 is rotated in the opposite direction, and the screw rod 419 will move towards the fixed rod 416, and finally contact the fixed rod 416, so that the second inclined block 417 is fixed.

[0046] Example two: as shown in the figure, Figure 9 Compared with example one, another embodiment of the present application is that: the surface of one of the plurality of limiting plates 23 is rotatably connected with a grinding roller 425, and the grinding roller 425 is in contact with the pipe 5.

[0047] Specifically, since some pipes 5 have some sticky paper and iron filings on the surface before cutting, these impurities will cause the focusing point of the laser beam to deviate, causing uneven cutting edges to occur, and the melted sticky paper is easy to adhere to the cutting surface, increasing the roughness of the cutting surface. By setting the grinding roller 425, when the pipe 5 passes through the inside of the limiting plate 23, the grinding roller 425 is started to rotate, and the grinding roller 425 will be in contact with the pipe 5. In order to cooperate with the cutting of the cutting structure 3, the pipe 5 will also rotate by one end mechanism during cutting, so that the grinding roller 425 will polish the surface of the pipe 5 when the grinding roller 425 is in contact with the pipe 5, so that the impurities on the surface of the pipe 5 are reduced during cutting.

[0048] AsFigure 9 As shown, the surface of the driving shaft 22 is covered with a connecting track 421, the other end of the connecting track 421 is covered with a second gear 422, and the second gear 422 is rotatably connected to the side wall of the limiting plate 23, one end of the grinding roller 425 is covered with a connecting chain 424, the other end of the connecting chain 424 is covered with a third gear 423, and the third gear 423 is meshed with the second gear 422.

[0049] Specifically, when the driving shaft 22 rotates, the pipe 5 will be transported, and at this time the connecting track 421 on the surface of the driving shaft 22 will drive the third gear 423 to rotate through the second gear 422. When the third gear 423 rotates, since the third gear 423 is connected to the grinding roller 425 through the connecting chain 424, the grinding roller 425 will also rotate at this time, thereby achieving grinding of the pipe 5.

[0050] like Figures 10 to 11 As shown, a plurality of rotating shafts 428 are provided on one side of the plurality of limit plates 23 , and the arc surface of the rotating shaft 428 is rotatably connected to a rotating arm 427 , and an abutting sponge 426 is provided at one end of the rotating arm 427 , and the abutting sponge 426 is in contact with the pipe 5 .

[0051] Specifically, by setting up a number of abutment sponges 426, when the pipe 5 is transported, the abutment sponges 426 are rotated to contact the pipe 5 and completely surround the surface of the pipe 5. Since the pipe 5 is moving at this time, the abutment sponges 426 will wipe off the dust on the surface of the pipe 5 for subsequent cutting work.

[0052] like Figures 10 to 11 As shown, the arc surface of the rotating shaft 428 is covered with a coil spring 429 , and the coil spring 429 is connected to the limiting plate 23 .

[0053] Specifically, by providing a coil spring 429, when the abutting sponge 426 surrounds the pipes 5 of different sizes, the coil spring 429 will release the elastic force, thereby adaptively adjusting the abutting force between the abutting sponge 426 and the pipe 5, so that pipes 5 of different sizes can be cleaned.

[0054] Working principle: the scheme of a laser cutting machine, suitable for cutting pipe 5, before cutting, pipe 5 will pass from the inside of the limiting plate 23, then the driving shaft 22 will rotate and drive pipe 5 to move, and at this time the connecting track 421 on the surface of the driving shaft 22 will drive the third gear 423 to rotate through the second gear 422, when the third gear 423 rotates, since the third gear 423 and the polishing roller 425 are connected through the connecting chain 424, the polishing roller 425 will also rotate at this time, the polishing roller 425 will contact with pipe 5, and since the pipe 5 is also rotating at this time, when the polishing roller 425 contacts with pipe 5, the polishing roller 425 will polish the surface of pipe 5, so that pipe 5 has no impurities on the surface when cutting, at this time the surface treatment before cutting is completed, then pipe 5 moves to the position required to be cut, start the laser module 31, pipe 5 can be cut, and when cutting, since the driving shaft 22 is rotating at this time, the driving gear 420 on the surface of the driving shaft 22 will drive the rack 408 to move through the first gear 407, and in the process of moving the rack 408, the first inclined block 415 will abut against the abutment block 406, so that the abutment block 406 drives the sliding block 402 to move through the trigger plate 409, since the sliding block 402 is connected with the laser module 31, the laser module 31 will be driven at this time, so that the cutting head 32 moves synchronously with pipe 5, then after cutting, the cut pipe 5 will fall on the surface of the pressing plate 404, at this time the pressing plate 404 will move downward and contact with the trigger plate 409, so that the trigger plate 409 also moves downward, in the process of moving the trigger plate 409, the abutment block 406 will no longer abut against the first inclined block 415, at this time the return spring 403 will release the elastic force, so that the sliding block 402 and the trigger plate 409 move towards pipe 5, then the abutment block 406 will abut against the next second inclined block 417, and the second inclined block 417 is the position required to be cut for the next pipe 5, at this time the automatic adjustment of the cutting position of pipe 5 is realized, which is very convenient.

[0055] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, the above examples and descriptions in the specification are only to illustrate the principles of the present application, without departing from the spirit and scope of the present application, the present application can have various changes and improvements, which all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A laser cutting machine, comprising a base frame (1), an upper end of the base frame (1) is provided with a conveying structure (2), the conveying structure (2) is used for conveying a pipe (5), an upper end of the conveying structure (2) is provided with a cutting structure (3), the cutting structure (3) comprises a laser module (31), the laser module (31) is arranged at the upper end of the base frame (1), a lower end of the laser module (31) is provided with a cutting head (32), characterized in that: The lower end of the cutting structure (3) is provided with an adjusting structure (4) near one end of the conveying structure (2); The adjusting structure (4) comprises: A sliding rod (412) is arranged on one side of the base frame (1); A sliding block (402) is connected with the laser module (31), and the sliding block (402) is slidingly connected to the surface of the sliding rod (412); A reset spring (403) is sleeved on the surface of the sliding rod (412); A trigger plate (409) is slidingly connected to one side of the sliding block (402); An abutting block (406) is arranged at the upper end of the trigger plate (409); A rack (408) is slidingly connected to one side of the base frame (1); A first inclined block (415) is arranged at the lower end of the rack (408); A plurality of second inclined blocks (417) are arranged at the lower end of the rack (408); The conveying structure (2) comprises a conveying roller (21) which is rotatably connected to the upper end of the base frame (1); A driving shaft (22) is rotatably connected to the upper end of the base frame (1), and the arc surface of the driving shaft (22) is connected with the conveying roller (21); A plurality of limiting plates (23) are arranged at the upper end of the base frame (1), and the pipe (5) passes through the inside of the limiting plate (23); The adjusting structure (4) further comprises: A connecting arm (401) is arranged at one end of the laser module (31), and the other end of the connecting arm (401) is connected with the sliding block (402); A driving gear (420) is arranged on the surface of the driving shaft (22); A first gear (407) is rotatably connected to the side wall of the base frame (1), and the first gear (407) is engaged with the driving gear (420), and the first gear (407) is engaged with the rack (408); A sliding shaft (410) is arranged in the sliding block (402), and the trigger plate (409) is slidingly connected to the surface of the sliding shaft (410); A compression spring (411) is sleeved on the surface of the sliding shaft (410); A fixed shaft (413) is arranged in the base frame (1); A pressing plate (404) is slidingly connected to the surface of the fixed shaft (413), and the lower surface of the pressing plate (404) is in contact with the trigger plate (409) when moving; An adjusting spring (414) is sleeved on the surface of the fixed shaft (413); The surface of the pressing plate (404) is inclined, and the inclined surface of the pressing plate (404) is in contact with the pipe (5); The driving shaft (22) rotates, the driving gear (420) on the surface of the driving shaft (22) drives the rack (408) to move through the first gear (407), in the movement process of the rack (408), the first inclined block (415) abuts against the abutting block (406), the abutting block (406) drives the sliding block (402) to move through the trigger plate (409), the laser module (31) is driven, so that the cutting head (32) moves synchronously with the pipe (5), the cut pipe (5) falls on the surface of the pressing plate (404), the pressing plate (404) moves downwards and is in contact with the trigger plate (409), the trigger plate (409) moves downwards, in the movement process of the trigger plate (409), the abutting block (406) is no longer in abutment with the first inclined block (415), the elastic force of the reset spring (403) is released, so that the sliding block (402) and the trigger plate (409) move towards the pipe (5), and the abutting block (406) abuts against the next second inclined block (417).

2. A laser cutting machine as claimed in claim 1, characterized in that: The surface of the pressing plate (404) is provided with a limiting baffle (405), and the limiting baffle (405) is in contact with the pipe (5); The second inclined block (417) is slidably connected to the lower end of the rack (408); The lower end of the rack (408) is provided with a fixed rod (416), the upper end of the second inclined block (417) is provided with a sliding ring (418), and the sliding ring (418) slides on the surface of the fixed rod (416), and the surface of the sliding ring (418) is threadedly connected with a screw rod (419).

3. A laser cutting machine as claimed in claim 1, characterized in that: The surface of one of the plurality of limiting plates (23) is rotatably connected with a polishing roller (425), and the polishing roller (425) is in contact with the pipe (5).

4. A laser cutting machine as claimed in claim 3, wherein: The surface of the driving shaft (22) is sleeved with a connecting track (421), the other end of the connecting track (421) is sleeved with a second gear (422), the second gear (422) is rotatably connected to the side wall of the limiting plate (23), one end of the polishing roller (425) is sleeved with a connecting chain (424), the other end of the connecting chain (424) is sleeved with a third gear (423), and the third gear (423) is engaged with the second gear (422).

5. A laser cutting machine as claimed in claim 4, wherein: One side of the plurality of limiting plates (23) is provided with a plurality of rotating shafts (428), the circular arc surface of the rotating shaft (428) is rotatably connected with a rotating arm (427), one end of the rotating arm (427) is provided with an abutting sponge (426), and the abutting sponge (426) is in contact with the pipe (5).

6. A laser cutting machine as claimed in claim 5, wherein: The circular arc surface of the rotating shaft (428) is sleeved with a coil spring (429), and the coil spring (429) is connected with the limiting plate (23).

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