A chuck system of a laser pipe cutting machine and a method for chuck to fix a pipe

Abstract

The present invention discloses a chuck system for a laser pipe cutting machine and a method for fixing a pipe by the chuck. Among them, the chuck system of the laser pipe cutting machine includes a frame and a hollow chuck, and further includes a fixed jaw assembly and a fixed jaw driving device. The fixed jaw assembly is installed outside the roller jaw assembly. The fixed jaw assembly includes a fixed jaw mounting seat, a fixed jaw transmission mechanism and fixed jaws. The fixed jaw transmission mechanism is installed on the fixed jaw mounting seat, and the fixed jaws are installed at the power output end of the fixed jaw transmission mechanism. The fixed jaw driving device includes a seat body, a seat body translation mechanism and a fixed jaw driving mechanism. The seat body is installed on the guide rail. The seat body translation mechanism is used to drive the seat body to translate along the guide rail. The fixed jaw driving mechanism is installed on the seat body, and the fixed jaw driving mechanism cooperates with the fixed jaw transmission mechanism correspondingly. By the cooperation of the roller jaw assembly and the fixed jaw assembly, the laser pipe cutting machine of the present invention can cut the tail material of the pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of laser pipe cutting machines, and particularly to a chuck system of a laser pipe cutting machine and a method for fixing a pipe by the chuck. Background Art

[0002] Laser pipe cutting is a high-efficiency and high-precision cutting method that uses a laser beam with a high energy density as a heat source. As a new cutting technology, laser pipe cutting has the advantages of fast cutting speed, high production efficiency, high cutting surface quality, and small heat-affected zone. With the continuous development of laser technology and numerical control technology, laser pipe cutting has now become an advanced processing method in the industrial pipe cutting field.

[0003] In the prior art, the basic layout of a laser pipe cutting machine mostly has two special pipe cutting chucks arranged on a long and slender bed. The rear chuck is responsible for clamping the pipe and rotating and moving it back and forth. The other chuck is a hollow structure with four jaws being rollers, that is, a hollow chuck with roller jaws. The hollow chuck is for auxiliary support and rotates synchronously with the rear chuck. The laser cutting head cuts the pipe at a position close to the hollow chuck. This layout is simple and reliable, but there is also a common problem in the industry that it is impossible to achieve 100% utilization of the pipe material. There is always an area of 100 - 300 MM that cannot be cut. This is mainly because the rear chuck and the hollow chuck always need to hold the pipe, resulting in a pipe tail length of 100 - 300 MM that cannot be cut, causing waste of the pipe tail. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a chuck system of a laser pipe cutting machine that can cut the pipe tail according to the deficiencies of the above prior art. At the same time, the present invention also provides a method for fixing a pipe by the chuck system of the laser pipe cutting machine.

[0005] To solve the first above-mentioned technical problem, the technical solution of the present invention is as follows: A chuck system for a laser pipe cutting machine, comprising a frame and a hollow chuck. A guide rail is provided on the frame, and the hollow chuck is installed on the guide rail. The hollow chuck includes a chuck seat, a rotating disk, a rotating disk rotating device, a chuck seat translation device, and a roller chuck assembly. The rotating disk is installed on one side of the chuck seat. The rotating disk rotating device is used to drive the rotation of the rotating disk. The chuck seat translation device is used to drive the chuck seat to translate along the guide rail. The roller chuck assembly is installed on the outer side of the rotating disk. It further includes a fixed chuck assembly and a fixed chuck driving device. The fixed chuck assembly is installed on the outer side of the roller chuck assembly. The fixed chuck assembly includes a fixed jaw mounting seat, a fixed jaw transmission mechanism, and a fixed jaw. The fixed jaw transmission mechanism is installed on the fixed jaw mounting seat, and the fixed jaw is installed at the power output end of the fixed jaw transmission mechanism. The fixed chuck driving device includes a seat body, a seat body translation mechanism, and a fixed jaw driving mechanism. The seat body is installed on the guide rail. The seat body translation mechanism is used to drive the seat body to translate along the guide rail. The fixed jaw driving mechanism is installed on the seat body, and the fixed jaw driving mechanism is in corresponding cooperation with the fixed jaw transmission mechanism.

[0006] Preferably, the number of the roller chuck assemblies is four groups, and the positions of the four groups of roller chuck assemblies are opposite to each other in pairs. The number of the fixed chuck assemblies is two groups, which are installed on the outer sides of two groups of roller chuck assemblies with opposite positions.

[0007] Preferably, the fixed jaw transmission mechanism includes a gland, a cam, a camshaft, and a slider. The fixed jaw is installed at one end of the slider. The slider is slidably installed at one end of the fixed jaw mounting seat. The camshaft is installed at the other end of the fixed jaw mounting seat. The cam is sleeved on the camshaft, and the cam abuts and cooperates with the other end of the slider. The gland is installed on the outer side of the cam, and a torsion hole is provided in the middle of the gland.

[0008] Preferably, a slider pressing plate is provided on the outer side of the slider, and a return spring is provided on the inner side of the slider. The outer edge of the cam is provided with a first cut surface and a second cut surface that are in surface contact and cooperation with the end of the slider. The distance between the first cut surface and the center of the cam is greater than the distance between the second cut surface and the center of the cam.

[0009] Preferably, the fixed jaw driving mechanism includes a rotary cylinder and a torsion part. The rotary cylinder is installed on the seat body. The torsion part is installed at the power output end of the rotary cylinder. The outer end of the torsion part is in corresponding cooperation with the torsion hole of the gland to drive the gland to rotate. The seat body translation mechanism includes a cylinder seat and a translation cylinder. The cylinder seat is installed on the frame, the translation cylinder is installed on the cylinder seat, and the cylinder rod of the translation cylinder is connected to the seat body.

[0010] Preferably, the fixed jaw driving device further includes an induction switch, which is installed on the frame and used to sense whether the hollow chuck is in contact or not.

[0011] Preferably, the rotating disk rotating device is provided with a rotating disk driving motor, and the chuck seat translation device is provided with a chuck seat driving motor.

[0012] To solve the above second technical problem, the technical solution of the present invention is: A method for fixing a pipe by a chuck system of the laser pipe cutting machine, including:

[0013] Ⅰ. Steps for laser cutting the main body material of the pipe, the steps are as follows:

[0014] S1. The fixed jaw assembly and the fixed jaw driving device are in a standby state;

[0015] S2. The chuck seat translation device of the hollow chuck drives the chuck seat to translate along the guide rail, the rotating disk rotating device drives the rotating disk to rotate, and the roller jaw assembly of the hollow chuck clamps the pipe, supports the pipe and allows the pipe to rotate and axially move;

[0016] S3. The laser cutting head performs laser cutting on the main body material of the pipe;

[0017] Ⅱ. Steps for laser cutting the tail material of the pipe, the steps are as follows:

[0018] S1. When the roller jaw assembly of the hollow chuck approaches the limit tail material of the pipe, the control system issues a working instruction for the fixed jaw assembly. At this time, the hollow chuck approaches the fixed jaw driving mechanism of the fixed jaw driving device;

[0019] S2. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate, so that the position of the fixed jaw transmission mechanism of the fixed jaw assembly is opposite to that of the fixed jaw driving mechanism;

[0020] S3. The seat body translation mechanism drives the seat body to translate along the guide rail, so that the fixed jaw driving mechanism is docked with the fixed jaw transmission mechanism;

[0021] S4. The fixed jaw driving mechanism works, drives the fixed jaw transmission mechanism to work, and further drives the fixed jaw to clamp the tail of the pipe;

[0022] S5. The chuck seat translation device drives the chuck seat to translate along the guide rail, the rotating disk rotating device drives the rotating disk to rotate, and the laser cutting head performs laser cutting on the tail material of the pipe.

[0023] Preferably, in step II, it includes the steps of driving two sets of fixed jaw assemblies with opposite positions: 1. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate, so that the fixed jaw transmission mechanism of one set of fixed jaw assemblies is opposite to the fixed jaw driving mechanism, and then steps S3 and S4 are executed; 2. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate 180 degrees, so that the fixed jaw transmission mechanism of the other set of fixed jaw assemblies is opposite to the fixed jaw driving mechanism, and then steps S3 and S4 are executed again.

[0024] Preferably, in steps S2 - S4 of step II, the working mode of the seat translation mechanism is to drive the seat to translate along the guide rail through a translation cylinder; the working mode of the fixed jaw driving mechanism is to drive the torsion part to rotate through a rotating cylinder; the working mode of the fixed jaw transmission mechanism is that first the torsion part drives the gland to rotate, then the gland drives the cam to rotate, then the cam drives the slider to translate, and finally the slider drives the fixed jaw to perform a clamping action.

[0025] The beneficial effects of the present invention are as follows: Since the present invention adds a fixed jaw assembly and a fixed jaw driving device on the basis of a hollow chuck, the fixed jaw assembly further includes a fixed jaw mounting seat, a fixed jaw transmission mechanism and a fixed jaw. The fixed jaw transmission mechanism is installed on the fixed jaw mounting seat, and the fixed jaw is installed at the power output end of the fixed jaw transmission mechanism. The fixed jaw driving device includes a seat body, a seat body translation mechanism and a fixed jaw driving mechanism. The seat body is installed on the guide rail. The seat body translation mechanism is used to drive the seat body to translate along the guide rail. The fixed jaw driving mechanism is installed on the seat body, and the fixed jaw driving mechanism cooperates with the fixed jaw transmission mechanism correspondingly. Therefore, when the roller jaw assembly of the hollow chuck approaches the limit tail material of the pipe, the control system can control the roller jaw assembly and the fixed jaw assembly to clamp the tail material of the pipe together, that is, the rotating disk rotating device of the hollow chuck drives the rotating disk to rotate, so that the fixed jaw transmission mechanism of the fixed jaw assembly is opposite to the fixed jaw driving mechanism. The seat body translation mechanism drives the seat body to translate along the guide rail, so that the fixed jaw driving mechanism is docked with the fixed jaw transmission mechanism. The fixed jaw driving mechanism works, drives the fixed jaw transmission mechanism to work, and further drives the fixed jaw to clamp the tail of the pipe. Through the cooperation of the roller jaw assembly and the fixed jaw assembly, the present invention enables the laser pipe cutting machine, when cutting the tail material of the pipe, to change the role of the hollow chuck from being responsible for auxiliary support of the pipe to being able to actively clamp and rotate the tail material of the pipe and drive the tail material of the pipe to move forward and backward, achieving the purpose of being able to laser cut the tail material of the pipe and completely solving the problem that the prior art cannot cut the tail material of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is one of the overall structure diagrams of the chuck system of the present invention.

[0027] Figure 2 It is the second of the overall structure diagrams of the chuck system of the present invention.

[0028] Figure 3 One of the exploded views of the hollow chuck, the fixed jaw assembly and the fixed jaw driving device.

[0029] Figure 4 Another exploded view of the hollow chuck, the fixed jaw assembly and the fixed jaw driving device.

[0030] Figure 5 One of the cam structure diagrams.

[0031] Figure 6 Another cam structure diagram. Detailed implementation manners

[0032] The structural principle and working principle of the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] As Figures 1 - 4 shown, the present invention is a chuck system of a laser pipe cutting machine, including a frame 1 and a hollow chuck 2. A guide rail 3 is provided on the frame 1, and the hollow chuck 2 is installed on the guide rail 3. The hollow chuck 2 includes a chuck seat 21, a rotating disk 22, a rotating disk rotating device 23, a chuck seat translation device 24 and a roller jaw assembly 25. The rotating disk 22 is installed on one side of the chuck seat 21. The rotating disk rotating device 23 is used to drive the rotating disk 22 to rotate. The chuck seat translation device 24 is used to drive the chuck seat 21 to translate along the guide rail 3. The roller jaw assembly 25 is installed outside the rotating disk 22. It further includes a fixed jaw assembly 4 and a fixed jaw driving device 5. The fixed jaw assembly 4 is installed outside the roller jaw assembly 25. The fixed jaw assembly 4 includes a fixed jaw mounting seat 41, a fixed jaw transmission mechanism 42 and fixed jaws 43. The fixed jaw transmission mechanism 42 is installed on the fixed jaw mounting seat 41, and the fixed jaws 43 are installed at the power output end of the fixed jaw transmission mechanism 42. The fixed jaw driving device 5 includes a seat body 51, a seat body translation mechanism 52 and a fixed jaw driving mechanism 53. The seat body 51 is installed on the guide rail 3. The seat body translation mechanism 52 is used to drive the seat body 51 to translate along the guide rail 3. The fixed jaw driving mechanism 53 is installed on the seat body 1 and is in cooperation with the fixed jaw transmission mechanism 42.

[0034] As Figures 1 - 4 shown, the number of the roller jaw assemblies 25 is four groups, and the positions of the four groups of roller jaw assemblies 25 are opposite to each other in pairs. The number of the fixed jaw assemblies 4 is two groups, which are installed outside two groups of roller jaw assemblies 25 with opposite positions. Arranging two groups of roller jaw assemblies with opposite positions can better fix the tail material of the pipe.

[0035] As Figures 1 - 4 shown and with reference toFigure 5 , Figure 6 , the fixed jaw drive mechanism 42 includes a gland 421, a cam 422, a camshaft 423 and a slider 424. The fixed jaw 43 is installed at one end of the slider 424. The slider 424 is slidably installed at one end of the fixed jaw mounting seat 41. The camshaft 423 is installed at the other end of the fixed jaw mounting seat 41. The cam 422 is sleeved on the camshaft 423. The cam 422 is in abutting cooperation with the other end of the slider 424. The gland 421 is installed outside the cam 422. A torsion hole 425 is provided in the middle of the gland 421. The fixed jaw driving mechanism 53 includes a rotary cylinder 531 and a torsion part 532. The rotary cylinder 531 is installed on the seat body 51. The torsion part 532 is installed at the power output end of the rotary cylinder 531. The outer end of the torsion part 531 corresponds to and cooperates with the torsion hole 425 of the gland 421 to drive the gland 421 to rotate. The seat body translation mechanism 52 includes a cylinder seat 521 and a translation cylinder 522. The cylinder seat 521 is installed on the frame 1. The translation cylinder 522 is installed on the cylinder seat 521. The cylinder rod of the translation cylinder 522 is connected to the seat body 51. The torsion hole 425 is preferably a square hole, and the torsion part 532 is preferably a square torsion part. When the equipment cuts the pipe close to the limit of the tail material, the system issues a command to switch the jaws. At this time, the hollow chuck 2 approaches the rotary cylinder 531, and the translation cylinder 522 starts to axially expand and contract, driving the seat body 51 to move towards the hollow chuck 2. And the torsion part 532 is inserted into the torsion hole 425 of the gland 421, and then the rotary cylinder 531 rotates 180 degrees, driving the gland 421 to rotate. When the gland 421 rotates, it drives the cam 422 to rotate. During the rotation of the cam 422, the slider 424 is driven to move forward, so that the bottom surface of the fixed jaw 43 is higher than the highest point of the roller jaw assembly of the hollow chuck 2.

[0036] As Figure 5 , Figure 6As shown, a slider pressing plate 426 is provided on the outer side of the slider 424, which can limit the slider 424. A return spring (not shown in the figure) is provided inside the slider 426, so that the slider 426 is always elastically abutted against the outer edge of the cam 422. A first cut surface 427 and a second cut surface 428 which are in surface contact and cooperation with the end of the slider 426 are provided on the outer edge of the cam 422. The distance between the first cut surface 427 and the center of the cam 422 is greater than the distance between the second cut surface 428 and the center of the cam 422. The first cut surface 427 and the second cut surface 428 are opposite in position. Due to the provision of the first cut surface 427 and the second cut surface 428, when the fixed jaw assembly is not working, the second cut surface 428 of the cam 422 is in surface contact with the end of the slider 426. When it is necessary to fix the tail material of the pipe by the fixed jaw assembly, the first cut surface 427 of the cam 422 is in surface contact with the end of the slider 426. By means of surface contact, the abutting force and stability can be improved.

[0037] As Figures 1 - 4 shown, the fixed jaw driving device 5 further includes an induction switch 54, which is installed on the frame 1 and is used to sense whether the hollow chuck 2 is in contact. After the induction switch 54 contacts the hollow chuck 2, it feeds back the information to the control system, and the control system then issues a working instruction for the fixed jaw assembly.

[0038] As Figures 1 - 4 shown, the rotary disk rotating device 23 is provided with a rotary disk driving motor, and the chuck seat translation device 24 is provided with a chuck seat driving motor.

[0039] The method for the chuck of the chuck system of the laser pipe cutting machine according to the present invention includes:

[0040] Ⅰ. Steps for laser cutting the main pipe material, the steps are as follows:

[0041] S1. The fixed jaw assembly and the fixed jaw driving device are in a standby state;

[0042] S2. The chuck seat translation device of the hollow chuck drives the chuck seat to translate along the guide rail, the rotary disk rotating device drives the rotary disk to rotate, and the roller jaw assembly of the hollow chuck clamps the pipe, supports the pipe and allows the pipe to rotate and axially move;

[0043] S3. The laser cutting head performs laser cutting on the main pipe material;

[0044] Ⅱ. Steps for laser cutting the tail pipe material, the steps are as follows:

[0045] S1. When the roller jaw assembly of the hollow chuck approaches the limit tail material of the pipe, the control system issues a working instruction for the fixed jaw assembly. At this time, the hollow chuck approaches the fixed jaw driving mechanism of the fixed jaw driving device;

[0046] S2. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate, so that the position of the fixed jaw transmission mechanism of the fixed jaw assembly is opposite to that of the fixed jaw driving mechanism;

[0047] S3. The seat body translation mechanism drives the seat body to translate along the guide rail, so that the fixed jaw driving mechanism is docked with the fixed jaw transmission mechanism;

[0048] S4. The fixed jaw driving mechanism works, drives the fixed jaw transmission mechanism to work, and then drives the fixed jaw to clamp the tail of the pipe;

[0049] S5. The chuck seat translation device drives the chuck seat to translate along the guide rail, the rotating disk rotating device drives the rotating disk to rotate, and the laser cutting head performs laser cutting on the tail material of the pipe.

[0050] In step II, it includes the steps of driving two sets of fixed jaw assemblies with opposite positions: 1. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate, so that the position of the fixed jaw transmission mechanism of one set of fixed jaw assemblies is opposite to that of the fixed jaw driving mechanism, and then step S3 and step S4 are executed; 2. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate 180 degrees, so that the position of the fixed jaw transmission mechanism of the other set of fixed jaw assemblies is opposite to that of the fixed jaw driving mechanism, and then step S3 and step S4 are executed again.

[0051] In steps S2 - S4 of step II, the working mode of the seat body translation mechanism is to drive the seat body to translate along the guide rail through a translation cylinder; the working mode of the fixed jaw driving mechanism is to drive the torsion part to rotate through a rotating cylinder; the working mode of the fixed jaw transmission mechanism is that first the torsion part drives the gland to rotate, then the gland drives the cam to rotate, then the cam drives the slider to translate, and finally the slider drives the fixed jaw to perform a clamping action.

[0052] The above is only a preferred embodiment of the present invention. Any minor modification, equivalent change and modification made to the above embodiments based on the technical solution of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A chuck system of a laser pipe cutting machine, comprising a frame and a hollow chuck. A guide rail is provided on the frame, and the hollow chuck is installed on the guide rail. The hollow chuck includes a chuck base, a rotating disk, a rotating disk rotating device, a chuck base translation device, and a roller jaw assembly. The rotating disk is installed on one side of the chuck base. The rotating disk rotating device is used to drive the rotation of the rotating disk. The chuck base translation device is used to drive the chuck base to translate along the guide rail. The roller jaw assembly is installed on the outside of the rotating disk. It is characterized in that: It further includes a fixed jaw assembly and a fixed jaw driving device. The fixed jaw assembly is installed on the outer side of the roller jaw assembly. The fixed jaw assembly includes a fixed jaw mounting seat, a fixed jaw transmission mechanism, and a fixed jaw. The fixed jaw transmission mechanism is installed on the fixed jaw mounting seat, and the fixed jaw is installed at the power output end of the fixed jaw transmission mechanism. The fixed jaw driving device includes a seat body, a seat body translation mechanism, and a fixed jaw driving mechanism. The seat body is installed on the guide rail. The seat body translation mechanism is used to drive the seat body to translate along the guide rail. The fixed jaw driving mechanism is installed on the seat body and is correspondingly matched with the fixed jaw transmission mechanism. The number of the roller jaw assemblies is four groups, and the positions of the four groups of roller jaw assemblies are opposite to each other in pairs. The number of the fixed jaw assemblies is two groups, which are installed on the outer sides of two groups of roller jaw assemblies with opposite positions. The fixed jaw transmission mechanism includes a gland, a cam, a camshaft, and a slider. The fixed jaw is installed at one end of the slider. The slider is slidably installed at one end of the fixed jaw mounting seat. The camshaft is installed at the other end of the fixed jaw mounting seat. The cam is sleeved on the camshaft, and the cam abuts and cooperates with the other end of the slider. The gland is installed on the outer side of the cam, and a torsion hole is provided in the middle of the gland. The fixed jaw driving mechanism includes a rotary cylinder and a torsion part. The rotary cylinder is installed on the seat body, and the torsion part is installed at the power output end of the rotary cylinder. The outer end of the torsion part is correspondingly matched with the torsion hole of the gland to drive the gland to rotate. The seat body translation mechanism includes a cylinder seat and a translation cylinder. The cylinder seat is installed on the frame, and the translation cylinder is installed on the cylinder seat. The cylinder rod of the translation cylinder is connected to the seat body. Through the cooperation of the roller jaw assembly and the fixed jaw assembly, when the laser pipe cutting machine cuts the tail material of the pipe, the hollow chuck changes from the role of assisting in supporting the pipe to being able to actively clamp and rotate the tail material of the pipe and drive the tail material of the pipe to move forward and backward, so as to achieve the purpose of laser cutting the tail material of the pipe.

2. The chuck system of the laser tube cutting machine according to claim 1, wherein: A slider pressing plate is provided on the outer side of the slider, and a return spring is provided on the inner side of the slider, so that the slider is always elastically abutted against the outer edge of the cam. The outer edge of the cam is provided with a first cut surface and a second cut surface that are in surface contact and cooperation with the end of the slider. The distance between the first cut surface and the center of the cam is greater than the distance between the second cut surface and the center of the cam.

3. The chuck system of the laser pipe cutting machine according to claim 1, characterized in that: The fixed jaw driving device further includes an induction switch, which is installed on the frame and is used to sense whether the hollow chuck is in contact.

4. The chuck system of the laser pipe cutting machine according to claim 1, wherein: The rotary disk rotating device is provided with a rotary disk driving motor, and the chuck seat translation device is provided with a chuck seat driving motor.

5. A method for clamping a pipe by a chuck system of the laser pipe cutting machine according to any one of claims 1-4, characterized in that, Including: Ⅰ. Steps for laser cutting and processing the main material of the pipe are as follows: S1. The fixed jaw assembly and the fixed jaw driving device are in the standby state. S2. The chuck seat translation device of the hollow chuck drives the chuck seat to translate along the guide rail, the rotary disk rotating device drives the rotary disk to rotate, and the roller jaw assembly of the hollow chuck clamps the pipe, supports the pipe and allows the pipe to rotate and move axially. S3. The laser cutting head performs laser cutting on the main material of the pipe. Ⅱ. Steps for laser cutting the material at the tail of the pipe, the steps are as follows: S1. When the roller chuck assembly of the hollow chuck approaches the limit tail material of the pipe, the control system issues a working instruction for the fixed chuck assembly. At this time, the hollow chuck approaches the fixed jaw driving mechanism of the fixed chuck driving device; S2. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate, so that the fixed jaw transmission mechanism of the fixed chuck assembly is in a relative position with the fixed jaw driving mechanism; S3. The seat body translation mechanism drives the seat body to translate along the guide rail, so that the fixed jaw driving mechanism is docked with the fixed jaw transmission mechanism; S4. The fixed jaw driving mechanism works, driving the fixed jaw transmission mechanism to work, and then driving the fixed jaw to clamp the tail of the pipe; S5. The chuck seat translation device drives the chuck seat to translate along the guide rail, the rotating disk rotating device drives the rotating disk to rotate, and the laser cutting head performs laser cutting on the material at the tail of the pipe.

6. The method for clamping a pipe by the chuck system of the laser pipe cutting machine according to claim 5, characterized in that: In step Ⅱ, it includes the steps of driving two groups of fixed chuck assemblies with relative positions:

1. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate, so that the fixed jaw transmission mechanism of one group of fixed chuck assemblies is in a relative position with the fixed jaw driving mechanism, and then steps S3 and S4 are executed; 2. The rotating disk rotating device of the hollow chuck drives the rotating disk to rotate 180 degrees, so that the fixed jaw transmission mechanism of the other group of fixed chuck assemblies is in a relative position with the fixed jaw driving mechanism, and then steps S3 and S4 are executed again.

7. The method for clamping a pipe by the chuck system of the laser pipe cutting machine according to claim 6, characterized in that: In steps S2 - S4 of step Ⅱ, the working mode of the seat body translation mechanism is to drive the seat body to translate along the guide rail through a translation cylinder; the working mode of the fixed jaw driving mechanism is to drive the torsion part to rotate through a rotating cylinder; the working mode of the fixed jaw transmission mechanism is that first the torsion part drives the gland to rotate, then the gland drives the cam to rotate, then the cam drives the slider to translate, and finally the slider drives the fixed jaw to perform a clamping action.

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