A tube feeding mechanism for a laser tube cutting machine and a laser tube cutting machine

Abstract

The present invention belongs to the technical field of laser tube cutting machines, and particularly relates to a tube feeding mechanism for laser tube cutting machines and a laser tube cutting machine, comprising a mounting plate, a material dividing assembly, a marking assembly and a loading assembly; the material dividing assembly comprises a first shell, the inner wall of the first shell is rotatably connected to a material dividing shaft, and both ends of the material dividing shaft extend to the outside of the first shell, the top end of the first shell is fixedly connected to a second shell, the top end of the second shell is fixedly connected to a storage hopper, and one side outer wall of the second shell is fixedly connected to a third shell. By placing the tube in the storage hopper, using the second shell to sequentially put a number of tubes into the first shell, the tubes sequentially contact the material dividing shaft, and the tubes slide out of the third shell while the material dividing shaft rotates, completing the tube dividing operation and avoiding the jamming effect during the tube dividing process.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser tube cutting machines, and in particular relates to a tube feeding mechanism for a laser tube cutting machine and a laser tube cutting machine. Background Art

[0002] As a high-quality, high-precision, and high-efficiency processing method, laser cutting technology has been widely used in fields such as aviation, aerospace, and automobile manufacturing. Currently, with the continuous improvement of fiber laser cutting technology, especially the rapid development of the pipe cutting industry, laser processing has brought convenience and benefits to the manufacturing industry, and the market demand for laser pipe cutting machines is also increasing.

[0003] Existing laser tube cutting machines generally use horizontal transportation to move the tubes to the feeding end of the laser tube cutting machine to achieve the effect of continuous feeding. However, the horizontally moving tubes are prone to jamming during the feeding process.

[0004] Moreover, some pipes need to be marked when they are cut, so that the cutting accuracy of the laser pipe cutting machine can be judged according to the mark. Therefore, in order to avoid pipe feeding jams while having the function of feeding marking, a pipe feeding mechanism for a laser pipe cutting machine and a laser pipe cutting machine are needed. Summary of the Invention

[0005] In response to the above problems, the present invention provides a tube feeding mechanism for a laser tube cutting machine, comprising a mounting plate, a material dividing assembly, a marking assembly, and a material loading assembly;

[0006] The material distributing assembly includes a first shell, an inner wall of the first shell is rotatably connected to a material distributing shaft, and both ends of the material distributing shaft extend to the outside of the first shell, the top of the first shell is fixedly connected to the second shell, the top of the second shell is fixedly connected to the storage hopper, and one side outer wall of the second shell is fixedly connected to a third shell, and the third shell is connected to the marking assembly at an inclined angle, and the first shell, the second shell, the storage hopper and the third shell are all connected to each other;

[0007] The mounting plate includes a vertical plate and a horizontal plate, the first shell is fixedly connected to the top of the vertical plate, the marking assembly and the loading assembly are fixedly connected to the top of the horizontal plate, and the loading assembly is arranged inside the marking assembly, the marking assembly is an open structure, and one side of the marking assembly is rotatably connected to an inspection cover, both ends of the dividing shaft are transmission connected to the material receiving end of the marking assembly, and the driving end of the marking assembly is transmission connected to the loading assembly.

[0008] Further, the marking assembly includes a positioning plate;

[0009] There are two positioning plates, and the outer walls of the two positioning plates are rotatably connected to a driving wheel and a linkage wheel. The ends of the driving wheel, linkage wheel and material distribution shaft are all sleeved with transmission belts. The inner walls of the two positioning plates are fixedly connected to a motor, and the output end of the motor is transmission-connected to the driving wheel on the corresponding side.

[0010] Furthermore, a central tube is provided between the two positioning plates, both ends of the central tube are fixedly connected with bearings, the interiors of the two groups of bearings are rotatably connected with linkage tubes, and one end of the linkage tube is rotatably connected to the material distribution shell.

[0011] Furthermore, the bottom end of the central tube is fixedly connected to a negative pressure tube, the bottom end of the negative pressure tube is communicated with the air inlet end of the vacuum pump, and the vacuum pump is fixedly connected to the mounting plate.

[0012] Furthermore, the material distribution shell is a hollow structure, the outer wall of the material distribution shell is provided with a tube groove, and the surface of the tube groove is provided with a first through hole connected to the interior of the material distribution shell, one side outer wall of the material distribution shell is fixedly connected with an axle pin, and the axle pin is connected to the linkage wheel transmission, and the other side outer wall of the material distribution shell is provided with a second through hole, and the second through hole is connected to the linkage pipe.

[0013] Furthermore, a movable sleeve and a limiting sleeve are sleeved on the outside of the negative pressure tube, and a screw in contact with the outer wall of the negative pressure tube is threaded on the limiting sleeve. A spring is sleeved on the negative pressure tube, and the spring is clamped between the movable sleeve and the limiting sleeve.

[0014] Furthermore, one side outer wall of the movable sleeve is fixedly connected to a tool holder, and a marking blade is fixedly connected to the tool holder. One side outer wall of the limit sleeve is fixedly connected to a guide rod, the end of the guide rod is slidably connected to the tool holder, and the end of the guide rod is fixedly connected to the limit block.

[0015] Furthermore, a cylinder is fixedly connected to the outer wall of one of the positioning plates, the output end of the cylinder extends to the other side of the positioning plate and is transmission-connected to the pipe push plate, and the pipe push plate is used in conjunction with the loading assembly.

[0016] Furthermore, the material carrying assembly includes a first material carrying plate and a second material carrying plate;

[0017] One end of the first loading plate is fixedly connected to one end of the second loading plate, and a top end of the first loading plate and a side close to the second loading plate are rotatably connected to several groups of first guide wheels, and a side wall of the second loading plate close to the first guide wheel is rotatably connected to the second guide wheel. A first shock-absorbing column is provided on one side of the bottom end of the first loading plate, and a second shock-absorbing column is provided on the other side of the bottom end of the first loading plate. Both groups of the first loading plates are used in conjunction with the pipe pushing plate.

[0018] A laser tube cutting machine comprises a tube cutting assembly and any of the above-mentioned feeding mechanisms;

[0019] The tube cutting assembly includes a processing platform and a clamping bracket. The top side of the processing platform is fixedly connected to the laser tube cutting machine body, and the clamping bracket is slidably connected to the top of the processing platform.

[0020] The processing platform is fixedly connected to the outer wall of another positioning plate in the loading mechanism and is away from the side of the cylinder;

[0021] The clamping bracket is used in conjunction with the first loading plate in the loading mechanism.

[0022] The beneficial effects of the present invention are:

[0023] 1. By placing the pipes in the storage hopper, the second shell is used to sequentially place several pipes into the first shell. The pipes sequentially contact the distribution shaft. The distribution shaft rotates while the pipes slide out of the third shell, completing the pipe distribution operation and avoiding the jamming effect during the pipe distribution process.

[0024] 2. The pipes that slide out of the third shell fall onto the material distribution shells on both sides, and the vacuum pump, negative pressure pipe, central pipe and linkage pipe are used in conjunction to generate negative pressure in the material distribution shells, so that both ends of the pipes are fixed by the first through holes in the pipe groove, which facilitates the marking of the pipes and improves the stability of the pipe connection and marking process.

[0025] 3. The marking of the pipe surface is completed by the middle of the pipe contacting the marking blade while the material-distributing shell rotates. The pipe is separated from the pipe groove while the material-distributing shell continues to rotate. The marked pipe falls on the top of the first loading plate by using the arc-shaped marking blade, which improves the continuity of the loading process after the pipe is marked.

[0026] 4. By utilizing the inclined setting of the first loading plate, the pipe is rolled toward the first guide wheel and the second guide wheel, and the end of the pipe is pushed into the clamping bracket by the cylinder, thereby improving the processing efficiency for the cutting of the pipe.

[0027] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic structural diagram of a laser tube cutting machine according to an embodiment of the present invention is shown;

[0030] Figure 2 A schematic structural diagram of a material distribution assembly according to an embodiment of the present invention is shown;

[0031] Figure 3 A schematic structural diagram of a marking assembly according to an embodiment of the present invention is shown;

[0032] Figure 4 A schematic structural diagram of a material distribution housing according to an embodiment of the present invention is shown;

[0033] Figure 5 A schematic structural diagram of a marking blade according to an embodiment of the present invention is shown;

[0034] Figure 6 A schematic structural diagram of a material loading assembly according to an embodiment of the present invention is shown;

[0035] Figure 7 A schematic structural diagram of a pipe cutting assembly according to an embodiment of the present invention is shown;

[0036] Figure 8 A schematic structural diagram of a clamping bracket according to an embodiment of the present invention is shown;

[0037] Figure 9 A structural cross-sectional view of a processing platform according to an embodiment of the present invention is shown.

[0038] In the figure: 1. Mounting plate; 2. Distributing assembly; 21. First housing; 22. Distributing shaft; 23. Second housing; 24. Storage hopper; 25. Third housing; 3. Marking assembly; 31. Positioning plate; 32. Driving wheel; 33. Linkage wheel; 34. Transmission belt; 35. Motor; 36. Center tube; 37. Bearing; 38. Linkage tube; 39. Distributing housing; 310. Negative pressure tube; 311. Vacuum pump; 312. Pipe groove; 313. First through hole; 314. Axle pin; 315. Second through hole; 316. Movable sleeve; 317. Limit sleeve; 318. Spring; 319. Knife Frame; 320, guide rod; 321, limit block; 322, marking blade; 323, cylinder; 324, pipe push plate; 4, loading assembly; 41, first loading plate; 42, second loading plate; 43, first guide wheel; 44, second guide wheel; 45, first shock-absorbing column; 46, second shock-absorbing column; 5, inspection cover; 6, pipe cutting assembly; 61, processing platform; 62, laser pipe cutting machine body; 63, discharge port; 64, hollow slide cavity; 65, clamping bracket; 66, electric telescopic rod; 67, elastic clamping head; 68, linkage; 69, forward and reverse motor; 610, screw rod. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] The embodiment of the present invention provides a laser tube cutting machine, including a feeding mechanism and a tube cutting assembly 6; for example, Figure 1 shown.

[0041] The feeding mechanism includes a mounting plate 1 , a material dividing assembly 2 , a marking assembly 3 and a material loading assembly 4 .

[0042] The mounting plate 1 includes a vertical plate and a horizontal plate, the material dividing component 2 is fixedly connected to the top of the vertical plate, the marking component 3 and the loading component 4 are fixedly connected to the top of the horizontal plate, and the loading component 4 is arranged inside the marking component 3, the marking component 3 is an open structure, and one side of the marking component 3 is rotatably connected to an inspection cover 5, the material dividing end of the material dividing component 2 and the material receiving end of the marking component 3 are transmission connected, the driving end of the marking component 3 is transmission connected to the loading component 4, the pipe cutting component 6 is fixedly connected to one side of the marking component 3, and the pipe cutting component 6 is used in conjunction with the loading component 4.

[0043] Specifically, the material dividing component 2 is used to collect and organize the pipes, the marking component 3 is used to individually receive the pipes organized by the material dividing component 2, and complete the marking of the pipe surface during the receiving process, and the loading component 4 is used to receive the marked pipes and transfer them to the laser cutting machine for laser cutting.

[0044] The material distribution component 2 includes a first shell 21; illustratively, as Figure 2 shown.

[0045] The inner wall of the first shell 21 is rotatably connected to the material distribution shaft 22, and both ends of the material distribution shaft 22 extend to the outside of the first shell 21, the top of the first shell 21 is fixedly connected to the second shell 23, the top of the second shell 23 is fixedly connected to the storage hopper 24, and the outer wall of one side of the second shell 23 is fixedly connected to the third shell 25, and the third shell 25 is connected to the marking component 3 at an inclined angle. The first shell 21, the second shell 23, the storage hopper 24 and the third shell 25 are all connected to each other.

[0046] Furthermore, the first shell 21 is a hollow cylindrical structure, and the bottom end of the first shell 21 is fixedly connected to the top end of the vertical plate on the mounting plate 1 .

[0047] Specifically, the material distribution shaft 22 is used to transfer the pipes in the storage hopper 24 to the third housing 25 in sequence while rotating, so that the third housing 25 can continuously transport the pipes to the marking assembly 3.

[0048] The marking assembly 3 includes a positioning plate 31; illustratively, as Figure 3 、 Figure 4 and Figure 5 shown.

[0049] There are two positioning plates 31, and the outer walls of the two positioning plates 31 are rotatably connected to a driving wheel 32 and a linkage wheel 33. The driving wheel 32, the linkage wheel 33 and the end of the material distribution shaft 22 are all sleeved with a transmission belt 34. The inner walls of the two positioning plates 31 are fixedly connected to a motor 35, and the output end of the motor 35 is transmission-connected to the driving wheel 32 on the corresponding side;

[0050] A central tube 36 is provided between the two positioning plates 31, and bearings 37 are fixedly connected to both ends of the central tube 36. Linkage tubes 38 are rotatably connected to the interiors of the two sets of bearings 37, and one end of the linkage tube 38 is rotatably connected to the material distribution shell 39. A negative pressure tube 310 is fixedly connected to the bottom end of the central tube 36, and the bottom end of the negative pressure tube 310 is communicated with the air inlet end of the vacuum pump 311, and the vacuum pump 311 is fixedly connected to the mounting plate 1;

[0051] The material distribution housing 39 is a hollow structure. A pipe groove 312 is formed on the outer wall of the material distribution housing 39. A first through hole 313 is formed on the surface of the pipe groove 312 and is connected to the interior of the material distribution housing 39. An axle pin 314 is fixedly connected to the outer wall of one side of the material distribution housing 39, and the axle pin 314 is transmission-connected to the linkage wheel 33. A second through hole 315 is formed on the outer wall of the other side of the material distribution housing 39, and the second through hole 315 is connected to the linkage pipe 38.

[0052] The outer side of the negative pressure tube 310 is also sleeved with a movable sleeve 316 and a limiting sleeve 317, and the limiting sleeve 317 is threaded with a screw in contact with the outer wall of the negative pressure tube 310, the negative pressure tube 310 is sleeved with a spring 318, and the spring 318 is clamped between the movable sleeve 316 and the limiting sleeve 317, one side outer wall of the movable sleeve 316 is fixedly connected to a knife holder 319, and a marking blade 322 is fixedly connected to the knife holder 319, one side outer wall of the limiting sleeve 317 is fixedly connected to a guide rod 320, the end of the guide rod 320 is slidably connected to the knife holder 319, and the end of the guide rod 320 is fixedly connected to the limiting block 321;

[0053] A cylinder 323 is fixedly connected to the outer wall of one of the positioning plates 31 , and an output end of the cylinder 323 extends to the other side of the positioning plate 31 and is transmission-connected to the pipe pushing plate 324 .

[0054] Furthermore, the central tube 36 , the linkage tube 38 , the material distribution shell 39 and the negative pressure tube 310 are interconnected.

[0055] Furthermore, the tool holder 319 and the guide rod 320 are both L-shaped structures.

[0056] Furthermore, the marking blade 322 is a semicircular structure, and the top arc end of the marking blade 322 is located on the bottom end side of the central tube 36.

[0057] Specifically, the motor 35 is used to drive the driving wheel 32 to rotate, and at the same time, the transmission belt 34 is used to drive the linkage wheel 33 and the material distribution shaft 22 to rotate synchronously;

[0058] The vacuum pump 311 is used to suck negative pressure air into the material distribution housing 39 to achieve the effect of sucking the pipes in the pipe groove 312;

[0059] The marking blade 322 is used to mark the pipes on the material distribution housing 39 .

[0060] The material loading assembly 4 includes a first material loading plate 41 and a second material loading plate 42; for example, Figure 6 shown.

[0061] One end of the first loading plate 41 is fixedly connected to one end of the second loading plate 42, and a plurality of first guide wheels 43 are rotatably connected to the top of the first loading plate 41 and one side close to the second loading plate 42, and a second guide wheel 44 is rotatably connected to a side wall of the second loading plate 42 close to the first guide wheel 43. A first shock-absorbing column 45 is provided on one side of the bottom end of the first loading plate 41, and a second shock-absorbing column 46 is provided on the other side of the bottom end of the first loading plate 41.

[0062] Furthermore, the height of the second shock absorbing column 46 is smaller than that of the first shock absorbing column 45 .

[0063] Furthermore, the two groups of the first loading plates 41 and the second loading plates 42 are both arranged in an inclined shape.

[0064] Specifically, the first loading plate 41 is used to receive the marked pipes;

[0065] The second loading plate 42 is used to limit the position of the pipes received;

[0066] The first guide wheel 43 and the second guide wheel 44 are used in conjunction with each other to push the pipe to the feeding port of the laser pipe cutting machine;

[0067] The first shock-absorbing column 45 and the second shock-absorbing column 46 are used in conjunction with each other to provide shock absorption and buffering for the pipes dropped from the first loading plate 41 .

[0068] The pipe cutting assembly 6 includes a processing platform 61 and a clamping bracket 65; for example, Figure 7 、 Figure 8 and Figure 9 shown.

[0069] The top side of the processing platform 61 is fixedly connected to the laser tube cutting machine body 62, and the outer wall of one side of the laser tube cutting machine body 62 is provided with a discharge port 63. The top of the processing platform 61 is provided with a hollow sliding cavity 64. The clamping bracket 65 is slidably connected to the top of the processing platform 61. The outer walls on both sides of the clamping bracket 65 are fixedly connected to the electric telescopic rod 66. The telescopic end of the electric telescopic rod 66 extends into the clamping bracket 65, and the output end of the electric telescopic rod 66 is provided with an elastic clamping head 67. The bottom end of the clamping bracket 65 is fixedly connected to a linkage 68, and the linkage 68 is slidably connected in the hollow sliding cavity 64. The processing platform 61 is a hollow structure, and the inner wall of one side of the processing platform 61 is fixedly connected to a forward and reverse motor 69. A screw rod 610 is screwed on the linkage member 68, and one end of the screw rod 610 is transmission connected to the output end of the forward and reverse motor 69.

[0070] Furthermore, the clamping bracket 65 is used in conjunction with the cylinder 323 and the first loading plate 41 respectively.

[0071] Specifically, the clamping bracket 65 is used to clamp the pipe delivered by the feeding mechanism;

[0072] The forward and reverse motor 69 rotates while driving the screw rod 610, so that the linkage 68 drives the clamping bracket 65 to move closer to the laser tube cutting machine body 62;

[0073] The laser tube cutting machine body 62 is used to cut the tube delivered by the clamping bracket 65 .

[0074] The working principle of a laser tube cutting machine proposed in an embodiment of the present invention is as follows:

[0075] By placing the pipes in the storage hopper 24, the second housing 23 is used to sequentially place several pipes into the first housing 21. At this moment, the pipes sequentially contact the distribution shaft 22. The distribution shaft 22 rotates while the pipes slide out of the third housing 25, completing the pipe distribution operation.

[0076] The pipes that have slipped out of the third housing 25 fall onto the material distribution housings 39 on both sides. The vacuum pump 311, the negative pressure pipe 310, the central pipe 36 and the linkage pipe 38 are used in conjunction to generate negative pressure in the material distribution housing 39, so that both ends of the pipes are attracted and fixed by the first through holes 313 in the pipe groove 312, thereby transmitting the marking of the pipes.

[0077] While the motor 35 drives the driving wheel 32, the transmission belt 34 is used to make the linkage wheel 33 and the material distribution shaft 22 rotate synchronously, so that the material distribution shaft 22 discharges the material and the material distribution housing 39 receives the material synchronously, ensuring the continuity of the pipe transmission process;

[0078] As the material distribution housing 39 rotates, the middle of the pipe contacts the marking blade 322 to complete the marking of the pipe surface. As the material distribution housing 39 continues to rotate, the pipe is separated from the pipe groove 312, and the arc-shaped marking blade 322 is used to make the marked pipe fall onto the top of the first loading plate 41.

[0079] By utilizing the inclined setting of the first loading plate 41, the pipe is rolled toward the first guide wheel 43 and the second guide wheel 44, and the end of the pipe is pushed into the clamping bracket 65 by the cylinder 323. The electric telescopic rod 66 pushes the elastic clamping head 67 while clamping both sides of the pipe. The forward and reverse motor 69 drives the screw rod 610 to rotate, and the linkage part 68 screwed to the screw rod 610 drives the clamping bracket 65 to move synchronously, so that the pipe is moved into the laser pipe cutting machine body 62 for pipe cutting operation.

[0080] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tube feeding mechanism for a laser tube cutting machine, characterized by: It comprises a mounting plate (1), a material dividing assembly (2), a marking assembly (3) and a material loading assembly (4); The material distribution component (2) includes a first shell (21), the inner wall of the first shell (21) is rotatably connected to a material distribution shaft (22), and both ends of the material distribution shaft (22) extend to the outside of the first shell (21), the top of the first shell (21) is fixedly connected to a second shell (23), the top of the second shell (23) is fixedly connected to a storage hopper (24), and one side outer wall of the second shell (23) is fixedly connected to a third shell (25), and the third shell (25) is connected to the marking component (3) at an inclined angle, and the first shell (21), the second shell (23), the storage hopper (24) and the third shell (25) are all connected to each other; The mounting plate (1) includes a vertical plate and a horizontal plate, the first shell (21) is fixedly connected to the top of the vertical plate, the marking component (3) and the loading component (4) are fixedly connected to the top of the horizontal plate, and the loading component (4) is arranged inside the marking component (3), the marking component (3) is an open structure, and one side of the marking component (3) is rotatably connected to the inspection cover (5), both ends of the material distribution shaft (22) are transmission-connected to the material receiving end of the marking component (3), and the driving end of the marking component (3) is transmission-connected to the loading component (4); The marking assembly (3) includes a positioning plate (31); the number of the positioning plates (31) is two, and the outer walls of the two positioning plates (31) are rotatably connected to a driving wheel (32) and a linkage wheel (33), the ends of the driving wheel (32), the linkage wheel (33) and the material distribution shaft (22) are all sleeved with a transmission belt (34), the inner walls of the two positioning plates (31) are fixedly connected to a motor (35), and the output end of the motor (35) is transmission-connected to the driving wheel (32) on the corresponding side; A central tube (36) is provided between the two positioning plates (31), and bearings (37) are fixedly connected to both ends of the central tube (36). Linkage tubes (38) are rotatably connected to the interiors of the two sets of bearings (37), and one end of the linkage tube (38) is rotatably connected to the material distribution housing (39); The bottom end of the central tube (36) is fixedly connected to a negative pressure tube (310), the bottom end of the negative pressure tube (310) is in communication with an air inlet end of a vacuum pump (311), and the vacuum pump (311) is fixedly connected to the mounting plate (1); The material distribution shell (39) is a hollow structure. A tube groove (312) is provided on the outer wall of the material distribution shell (39), and a first through hole (313) is provided on the surface of the tube groove (312) and is connected to the interior of the material distribution shell (39). An axle pin (314) is fixedly connected to the outer wall of one side of the material distribution shell (39), and the axle pin (314) is transmission-connected to the linkage wheel (33). A second through hole (315) is provided on the outer wall of the other side of the material distribution shell (39), and the second through hole (315) is connected to the linkage pipe (38). The outer side of the negative pressure tube (310) is also sleeved with a movable sleeve (316) and a limiting sleeve (317), and the limiting sleeve (317) is threaded with a screw that contacts the outer wall of the negative pressure tube (310). The negative pressure tube (310) is sleeved with a spring (318), and the spring (318) is clamped between the movable sleeve (316) and the limiting sleeve (317); One side outer wall of the movable sleeve (316) is fixedly connected to a tool holder (319), and a marking blade (322) is fixedly connected to the tool holder (319); one side outer wall of the limiting sleeve (317) is fixedly connected to a guide rod (320), an end of the guide rod (320) passes through and is slidably connected to the tool holder (319), and an end of the guide rod (320) is fixedly connected to a limiting block (321); The marking blade (322) is a semicircular structure, and the top arc surface end of the marking blade (322) is located on one side of the bottom end of the central tube (36).

2. The tube feeding mechanism for a laser tube cutting machine according to claim 1, characterized in that: A cylinder (323) is fixedly connected to the outer wall of the positioning plate (31), and the output end of the cylinder (323) extends to the other side of the positioning plate (31) and is transmission-connected to the pipe pushing plate (324), and the pipe pushing plate (324) is used in conjunction with the loading assembly (4).

3. The tube feeding mechanism for a laser tube cutting machine according to claim 2, characterized in that: The material carrying assembly (4) comprises a first material carrying plate (41) and a second material carrying plate (42); One end of the first loading plate (41) is fixedly connected to one end of the second loading plate (42); a top end of the first loading plate (41) and a side close to the second loading plate (42) are rotatably connected to a plurality of first guide wheels (43); a side wall of the second loading plate (42) close to the first guide wheel (43) is rotatably connected to a second guide wheel (44); a first shock-absorbing column (45) is provided on one side of the bottom end of the first loading plate (41), and a second shock-absorbing column (46) is provided on the other side of the bottom end of the first loading plate (41); and both groups of the first loading plates (41) are used in conjunction with the pipe pushing plate (324).

4. A laser tube cutting machine, characterized in that: It comprises a pipe cutting assembly (6), and a feeding mechanism as claimed in any one of claims 3; The tube cutting assembly (6) comprises a processing platform (61) and a clamping bracket (65), wherein a laser tube cutting machine body (62) is fixedly connected to one side of the top end of the processing platform (61), and the clamping bracket (65) is slidably connected to the top end of the processing platform (61); The processing platform (61) is fixedly connected to the outer wall of another positioning plate (31) in the loading mechanism and is away from the side of the cylinder (323); The clamping bracket (65) is used in conjunction with the first loading plate (41) in the loading mechanism.

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