Chuck apparatus for a laser pipe cutting machine

Abstract

The application discloses a chuck device for a laser pipe cutting machine, which comprises a chuck rack (4), a movable chuck (1) and a hollow chuck (2) are slidably connected on a chuck guide rail (41) of the chuck rack (4), and a fixed chuck (3) is arranged on one end of the chuck guide rail (41) and fixed on the chuck rack (4), the movable chuck (1) and the fixed chuck (3) are located on two sides of the hollow chuck (2), the movable chuck (1) can feed pipes to the hollow chuck (2) and can draw the finished pipes out of the hollow chuck (2), the movable chuck (1) and the fixed chuck (3) can accurately position the pipes on the hollow chuck (2) when the hollow chuck (2) feeds the pipes, and the hollow chuck (2) can fix the pipes and rotate the pipes to process the pipes. The chuck device is matched with the movable chuck, the hollow chuck and the fixed chuck, and the problem that the end of the pipe is difficult to process is solved.

Description

Technical Field

[0001] This invention relates to the field of laser cutting machine technology, specifically a chuck device for a laser tube cutting machine. Background Technology

[0002] In the existing technology, laser tube cutting machines usually fix both ends of the tube and then use a laser cutting actuator to cut the side wall of the tube. This fixing method is only suitable for cutting the middle section of the tube. When it is necessary to process the end of the tube, the end of the tube needs to be removed from the fixing device. At this time, the tube cannot be fixed and it is difficult to process. Therefore, the tube fixing method in the existing technology cannot meet the processing requirements of the end of the tube. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a chuck device for a laser tube cutting machine, thereby solving the problem that laser tube cutting machines have difficulty processing the ends of tubes.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A chuck device for a laser tube cutting machine is characterized in that: the chuck device includes a chuck frame, a movable chuck and a hollow chuck are slidably connected on the chuck guide rail of the chuck frame, and a fixed chuck is provided on the outer side of one end of the chuck guide rail and fixed on the chuck frame. The movable chuck and the fixed chuck are located on both sides of the hollow chuck. The movable chuck can feed material into the hollow chuck and can pull out the processed tube from the hollow chuck. When the movable chuck feeds material into the hollow chuck, the movable chuck and the fixed chuck cooperate to accurately position the tube on the hollow chuck. The hollow chuck can fix the tube and drive the tube to rotate for processing.

[0006] The movable chuck is provided with a movable chuck drive mechanism on its side, which can be linked with it. Both the movable chuck and the movable chuck drive mechanism are fixedly mounted on the movable chuck slide plate, and the movable chuck slide plate is slidably connected to the chuck guide rail through a slider. The output gear of the movable chuck drive mechanism is meshed with the guide rack provided between the chuck guide rail. The output gear of the movable chuck drive mechanism drives the movable chuck slide plate to move the movable chuck and the movable chuck drive mechanism back and forth linearly along the setting direction of the chuck guide rail by rotating forward and reverse.

[0007] A hollow chuck drive mechanism is provided on the side of the hollow chuck, which can be linked with it. Both the hollow chuck and the hollow chuck drive mechanism are fixedly mounted on the hollow chuck slide plate, and the hollow chuck slide plate is slidably connected to the chuck guide rail through a slider. The output gear of the hollow chuck drive mechanism is meshed with the guide rack provided between the chuck guide rail. The output gear of the hollow chuck drive mechanism drives the hollow chuck slide plate to move the hollow chuck and the hollow chuck drive mechanism to slide back and forth linearly along the setting direction of the chuck guide rail by rotating forward and reverse.

[0008] The hollow chuck includes a hollow chuck base and a drive turntable. The hollow chuck base is fixedly mounted on the hollow chuck slide plate, which is slidably connected to the chuck guide rail via a slider. The hollow chuck slide plate drives the drive turntable to slide linearly back and forth along the direction of the chuck guide rail via the hollow chuck base. The end face of the drive turntable is provided with a tube positioning mechanism surrounding the hollow hole. The drive turntable is connected to the hollow chuck base via roller bearings. The inner ring of the roller bearing is fixedly connected to the hollow chuck base, and the outer ring of the roller bearing is fixedly connected to the drive turntable (generally by bolts). The gear at the output end of the reducer of the turntable drive mechanism located in the hollow chuck base meshes with the gear on the circumferential surface of the outer ring of the bearing to drive the outer ring of the bearing and rotate the drive turntable.

[0009] The pipe positioning mechanism includes at least three anti-slip claws, which are arranged around the hollow hole of the active turntable and have anti-slip clips or contour block clips at their front ends to better clamp and fix the pipes.

[0010] The anti-slip claw includes a fixed claw and / or an adjustable claw. The fixed claw is fixedly connected to the active turntable via a claw fixing block, and the adjustable claw is slidably connected to the active turntable via a claw slider. The adjustable claw, located at the front end of the claw cylinder, can move along the radial direction of the active turntable within the range defined by the claw slider to accommodate the fixing of pipes of different diameters.

[0011] The hollow chuck also includes a driven turntable. The center hole of the driven turntable is fixedly connected to the center hole of the driving turntable through a connecting cylinder. The driving turntable drives the driven turntable to rotate synchronously through the connecting cylinder. The end face of the driven turntable away from the driving turntable is provided with a pipe auxiliary positioning mechanism around the hollow hole. The pipe auxiliary positioning mechanism includes at least three anti-slip claws. The anti-slip claws are arranged around the hollow hole of the driven turntable, and the front end of the anti-slip claws is provided with a pulley head to facilitate better sliding when the pipe is fed or unloaded and to play an auxiliary clamping role.

[0012] The movable chuck includes a movable chuck base, a feeding assembly, and a ejection assembly. The movable chuck base is fixedly mounted on the movable chuck slide plate, and the movable chuck slide plate is slidably connected to the chuck guide rail via a slider. Under the driving action of the movable chuck drive mechanism, the movable chuck slide plate can drive the movable chuck base to reciprocate along the chuck guide rail. The feeding assembly can feed material into the hollow chuck, and the ejection assembly can remove the processed pipe fitting from the hollow chuck.

[0013] The feeding assembly is located on the side opposite to the movable chuck and the hollow chuck. The feeding assembly includes a feeding clamping head that is positioned opposite to the chuck. The feeding clamping head can open and close under the drive of a corresponding cylinder to clamp or release one end of the pipe. After the feeding assembly clamps the end of the pipe, the movable chuck drives the feeding assembly to move closer to the hollow chuck, so that the other end of the pipe passes through the hollow hole of the hollow chuck to the set position, thus completing the feeding.

[0014] The ejection assembly includes an ejection bracket and an ejection clamping head. One end of the ejection bracket is fixedly connected to the movable chuck and the ejection bracket is perpendicular to the end face of the movable chuck. The other end of the ejection bracket is provided with an ejection clamping head that is positioned opposite to it. The ejection clamping head performs an opening and closing motion under the drive of a corresponding cylinder to clamp or release one end of the pipe fitting. After the ejection assembly clamps the end of the pipe fitting, the movable chuck drives the ejection assembly to move away from the hollow chuck, so that the other end of the pipe fitting exits from the hollow hole of the hollow chuck to the set position, thus completing the ejection.

[0015] The movable chuck is equipped with a movable chuck positioning block and a movable chuck positioning push rod located between the feeding clamp heads. The movable chuck positioning push rod is located at the output end of the movable chuck push rod cylinder, allowing the movable chuck positioning push rod to extend and retract relative to the movable chuck base. The fixed chuck is equipped with a fixed chuck positioning block and a fixed chuck positioning push rod on its fixed chuck base. The fixed chuck positioning push rod is located at the output end of the fixed chuck push rod cylinder, allowing the fixed chuck positioning push rod to extend and retract relative to the fixed chuck base. The fixed chuck positioning block is used to cooperate with the movable chuck positioning push rod for positioning, and the fixed chuck positioning push rod is used to cooperate with the movable chuck positioning block for positioning.

[0016] The present invention has the following advantages over the prior art:

[0017] The chuck device of the present invention achieves precise positioning and fixing of pipe fittings by using a moving chuck, a hollow chuck and a fixed chuck in combination. The hollow chuck fixes the middle part of the pipe fitting, so that both ends of the pipe fitting are completely detached from the fixing device. The laser cutting actuator can perform cutting operations on the ends of the pipe fitting, solving the problem of difficulty in processing the ends of pipe fittings in the prior art. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the chuck device for a laser tube cutting machine according to the present invention;

[0019] Appendix Figure 2 This is an isometric view of the moving chuck of the present invention;

[0020] Appendix Figure 3 This is an isometric view of the hollow chuck of the present invention;

[0021] Appendix Figure 4 This is a diagram showing the connection relationship between the active turntable and the hollow chuck base of the present invention.

[0022] Appendix Figure 5 This is a right view of the hollow chuck of the present invention;

[0023] Appendix Figure 6 This is a left view of the hollow chuck of the present invention;

[0024] Appendix Figure 7 This is an isometric drawing of the fixed caliper of the present invention.

[0025] Wherein: 1—Moving chuck; 10—Moving chuck drive mechanism; 11—Moving chuck base; 12—Feeding assembly; 121—Feeding clamp head; 122—Moving chuck positioning block; 123—Moving chuck positioning push rod; 1231—Moving chuck push rod cylinder; 13—Unloading assembly; 131—Unloading bracket; 132—Unloading clamp head; 14—Moving chuck slide plate; 2—Hollow chuck; 20—Hollow chuck drive mechanism; 21—Hollow chuck base ; 210—Turntable drive mechanism; 211—Active turntable; 212—Driven turntable; 213—Connecting cylinder; 214—Fixed jaw; 2141—Jaw fixing block; 215—Adjusting jaw; 2151—Jaw slider; 216—Anti-slip jaw; 217—Shaping block jaw; 218—Pulley jaw; 219—Hollow chuck slide plate; 22—Bearing inner ring; 23—Bearing outer ring; 3—Fixed chuck; 31—Fixed chuck base; 311—Fixed chuck positioning block; 312—Fixed chuck positioning push rod; 3121—Fixed chuck push rod cylinder; 4—Chuck frame; 41—Chuck guide rail; 42—Guide rack. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-7As shown: A chuck device for a laser tube cutting machine. The chuck device includes a chuck frame 4. A movable chuck 1 and a hollow chuck 2 are slidably connected on a chuck guide rail 41 of the chuck frame 4. A fixed chuck 3 is fixed on the chuck frame 4 at one end of the chuck guide rail 41. The movable chuck 1 and the fixed chuck 3 are located on both sides of the hollow chuck 2. The movable chuck 21 can feed material to the hollow chuck 22 and can pull out the processed tube from the hollow chuck 2. When the movable chuck 21 feeds material to the hollow chuck 22, the movable chuck 1 and the fixed chuck 3 cooperate to accurately position the tube on the hollow chuck 2. The hollow chuck 2 can fix the tube and drive the tube to rotate for processing. A movable chuck drive mechanism 10 is provided on the side of the movable chuck 1, which can be linked with it. Both the movable chuck 1 and the movable chuck drive mechanism 10 are fixedly mounted on the movable chuck slide plate 14, and the movable chuck slide plate 14 is slidably connected to the chuck guide rail 41 via a slider. The output gear of the movable chuck drive mechanism 10 meshes with the guide rack 42 provided between the chuck guide rail 41. The output gear of the movable chuck drive mechanism 10 drives the movable chuck slide plate 14 through forward and reverse rotation, causing the movable chuck 1 and the movable chuck drive mechanism 10 to slide linearly back and forth along the setting direction of the chuck guide rail 41; in the hollow chuck 2 A hollow chuck drive mechanism 20 is provided on the side and can be linked with it. Both the hollow chuck 2 and the hollow chuck drive mechanism 20 are fixedly mounted on the hollow chuck slide plate 219, and the hollow chuck slide plate 219 is slidably connected to the chuck guide rail 41 through a slider. The output gear of the hollow chuck drive mechanism 20 is meshed with the guide rack 42 provided between the chuck guide rail 41. The output gear of the hollow chuck drive mechanism 20 drives the hollow chuck slide plate 219 to drive the hollow chuck 2 and the hollow chuck drive mechanism 20 to slide linearly back and forth along the setting direction of the chuck guide rail 41 by rotating forward and reverse.

[0028] like Figure 2As shown: The moving chuck 1 includes a moving chuck base 11, a feeding assembly 12, and a retraction assembly 13. The moving chuck base 11 is fixedly mounted on the moving chuck slide plate 14, and the moving chuck slide plate 14 is slidably connected to the chuck guide rail 41 via a slider. Under the driving action of the moving chuck drive mechanism 20, the moving chuck slide plate 14 can drive the moving chuck base 11 to move linearly back and forth along the chuck guide rail 41. The feeding assembly 12 is located on the side of the moving chuck 1 opposite to the hollow chuck 2. The feeding assembly 12 includes two oppositely arranged feeding clamping heads 121. The two feeding clamping heads 121 can open and close under the drive of corresponding cylinders to clamp or release the end of the pipe fitting. After the feeding assembly 12 clamps the end of the pipe fitting, the moving chuck 1 pushes the feeding assembly 12 towards the hollow chuck 2, so that the other end of the pipe fitting passes through the hollow hole of the hollow chuck 2 to the set position, completing the feeding. The retraction assembly 13 uses a long strip... The ejector bracket 131 is fixedly connected to the movable chuck 1 and the ejector bracket 131 is perpendicular to the end face of the movable chuck 1. The ejector bracket 131 has two ejector clamping heads 132 arranged opposite to each other. The two ejector clamping heads 132 can open and close under the drive of the corresponding cylinder to clamp or release one end of the pipe fitting. After the ejector assembly 13 clamps the end of the pipe fitting, the movable chuck 1 drives the feeding assembly 13 to move away from the hollow chuck 2, so that the other end of the pipe fitting is ejected from the hollow hole of the hollow chuck 2, thus completing the ejection.

[0029] like Figure 3-6 As shown: The hollow chuck 2 includes a hollow chuck base 21, a turntable assembly, and a turntable drive mechanism 210. The hollow chuck base 21 is fixedly mounted on the hollow chuck slide plate 219, and the hollow chuck slide plate 219 is slidably connected to the chuck guide rail 41 via a slider. The hollow chuck slide plate 219 can drive the turntable assembly to move linearly back and forth along the chuck guide rail 41 via the hollow chuck base 21. The turntable assembly includes an active turntable 211 and a driven turntable 212. The main body of the chuck base 21, as well as the active turntable 211 and the driven turntable 212, are all disc-shaped rings. The turntable drive mechanism 210 includes a drive motor and a reducer. The drive turntable 211 is connected to the chuck base 21 via roller bearings. The inner ring 22 of the roller bearing is bolted to the inner ring of the hollow chuck base 21, and the outer ring 23 of the roller bearing is bolted to the outer edge of the ring of the drive turntable 211. The outer ring 23 of the roller bearing has a gear structure. The turntable drive mechanism 210 (installation position as follows) Figure 4 The gear at the output end of the reducer (located at the lower circular through hole) meshes with the gear on the circumferential surface of the bearing outer ring 23 to drive the bearing outer ring 23 to rotate the active turntable 211; the driven turntable 212 is fixedly connected to the active turntable 211 through the connecting cylinder 213, and the active turntable 211 drives the driven turntable 212 to rotate synchronously through the connecting cylinder 213.

[0030] like Figure 3 , 6 As shown: The active turntable 211 is equipped with four jaws, which are divided into two groups: upper and lower, and left and right. Each group has two jaws facing each other. Each group contains one fixed jaw 214 and one adjustable jaw 215. The fixed jaw 214 is fixedly connected to the active turntable 211 via a jaw fixing block 2141, and the adjustable jaw 215 is slidably connected to the active turntable 211 via a jaw slider 2151. The adjustable jaw 215 can move radially along the active turntable 211 within the range defined by the jaw slider to accommodate pipes of different diameters. The sliding and fixing of the adjustable jaw 215 is controlled by a cylinder. Furthermore, anti-slip clips 216 or contour blocks 217 can be provided at the ends of the jaws for better clamping and fixing of pipe fittings.

[0031] like Figure 3 , 5 As shown: The jaws on the driven turntable 212 are arranged in a similar manner to those on the driving turntable. The driven turntable 212 has four jaws, which are divided into two groups: one up and one down, and the other left and right. Each group has two jaws arranged opposite each other. Each group has one fixed jaw 214 and one adjusting jaw 215. The fixed jaw 214 is fixedly connected to the driven turntable 212 through a jaw fixing block 2141, and the adjusting jaw 215 is slidably connected to the driven turntable 212 through a jaw slider 2151. The adjusting jaw 215 can move radially along the driven turntable 212 within the range limited by the jaw slider to accommodate the fixing of pipes of different diameters. The sliding and fixing of the adjusting jaw 215 is controlled by a cylinder. The main difference lies in the jaws at the ends of the jaws. The jaws on the driven turntable 212 have pulley jaws 218, which allows for better sliding during pipe feeding or unloading, reducing friction between the jaws and the pipe, making feeding and unloading smoother. At the same time, the pulley jaws 218 can also play an auxiliary clamping role when the jaws are clamped.

[0032] like Figure 1 , 2As shown in Figure 7, the fixed chuck 3 is fixedly connected to the machine tool body at one end of the machine tool. The fixed chuck 3 includes a fixed chuck base 31. Furthermore, a positioning device is also provided on the movable chuck 1 and the fixed chuck 3. The positioning device includes a positioning block and a positioning push rod. The positioning push rod can move a short distance along the axial direction of the pipe under the drive of the cylinder. Its function is to push the pipe so that its other end abuts against the positioning surface of the positioning block. Specifically, a moving chuck positioning block 122 and a moving chuck positioning push rod 123 are provided between the two feeding clamping heads 121 of the moving chuck feeding assembly 12. Similarly, a fixed chuck positioning block 311 and a fixed chuck positioning push rod 312 are provided on the fixed chuck base 31. The positioning blocks and push rods on the moving chuck 1 and the fixed chuck 3 cooperate in pairs. That is, the moving chuck positioning block 122 on the moving chuck 1 cooperates with the fixed chuck positioning push rod 312 on the fixed chuck 3, and the fixed chuck positioning block 311 on the fixed chuck 3 cooperates with the moving chuck positioning push rod 123 on the moving chuck 1. The specific positioning process is as follows:

[0033] (1) When the fixed chuck positioning block 311 on the fixed chuck 3 is selected as the positioning reference, the moving chuck 1 pushes the pipe fitting towards the fixed chuck 3. The pipe fitting passes through the hollow chuck 2 and gradually approaches the fixed chuck 3. When the distance between the end of the pipe fitting near the fixed chuck 3 and the fixed chuck positioning block 311 is less than the maximum stroke of the moving chuck positioning push rod 123, the pushing of the moving chuck 1 stops. Then the moving chuck positioning push rod 123 on the moving chuck 1 is started to push the pipe fitting further towards the fixed chuck positioning block 311. When the end of the pipe fitting touches the positioning surface of the fixed chuck positioning block 311, the moving chuck positioning push rod 123 stops running, and the positioning of the pipe fitting is completed.

[0034] (2) When the movable chuck positioning block 122 on the movable chuck 1 is selected as the positioning reference, the movable chuck 1 pushes the pipe fitting towards the fixed chuck 3. The pipe fitting passes through the hollow chuck 2 and gradually approaches the fixed chuck 3. When the distance between the end of the pipe fitting near the fixed chuck 3 and the fixed chuck positioning block 311 is less than the maximum stroke of the fixed chuck positioning push rod 312, the pushing of the movable chuck 1 stops, and then the fixed chuck positioning push rod 312 on the fixed chuck 3 is started to push the pipe fitting further towards the movable chuck positioning block 122. When the end of the pipe fitting touches the positioning surface of the movable chuck positioning block 122, the fixed chuck positioning push rod 312 stops running, and the positioning of the pipe fitting is completed.

[0035] You only need to choose one of the two positioning methods mentioned above; it is not necessary to use both methods simultaneously.

[0036] The chuck device for a laser tube cutting machine provided by this invention operates as follows:

[0037] Pipe feeding: Two feeding clamping heads 121 can open and close under the drive of corresponding cylinders to clamp the end of the pipe. After the feeding assembly 12 clamps the end of the pipe, the moving chuck 1 pushes the feeding assembly 12 to run towards the hollow chuck 2, so that the other end of the pipe passes through the hollow hole of the hollow chuck 2 to the set position, thus completing the feeding.

[0038] Pipe positioning and clamping: The positioning block on the moving chuck 1 or the fixed chuck 3 is used as the positioning reference to adjust and position the pipe. The specific positioning method has been described in the positioning section of the moving chuck 1 or the fixed chuck 3, and will not be repeated here. After the pipe is positioned, the hollow chuck 2 clamps the pipe. Then the moving chuck 1 returns to its original position, leaving space for the laser cutting actuator to perform laser cutting on the pipe.

[0039] Laser cutting: The laser cutting actuator performs cutting operations on the tube held by the hollow chuck 2. The machine tool drives the laser cutting actuator to cut the tube through the X-axis drive device, Y-axis drive device and Z-axis drive device. At the same time, the turntable assembly of the hollow chuck 2 drives the tube to rotate around the central axis of the hollow chuck 2. The control center controls the X-axis drive device, Y-axis drive device, Z-axis drive device of the machine tool and the turntable assembly of the hollow chuck 2 in a coordinated manner to make the laser cutting actuator move relative to the tube and complete the irregular trajectory cutting set by the system.

[0040] Pipe unloading: The pipe after the cutting operation is completed is unloaded by the unloading component 13 on the moving chuck 1. After the unloading component 13 clamps the end of the pipe, the moving chuck 1 drives the feeding component 13 to move away from the hollow chuck 2, so that the other end of the pipe is ejected from the hollow hole of the hollow chuck 2, thus completing the unloading.

[0041] The chuck device of the present invention achieves precise positioning and fixing of the pipe fitting by using the movable chuck 1, the hollow chuck 2 and the fixed chuck 3 in combination. The hollow chuck 3 fixes the middle part of the pipe fitting, so that the two ends of the pipe fitting are completely separated from the fixing device. The laser cutting actuator can perform cutting operations on the ends of the pipe fitting, which solves the problem of difficulty in processing the ends of pipe fittings in the prior art.

[0042] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention. Technologies not covered in this invention can be implemented using existing technologies.

Claims

1. A chuck device for a laser tube cutting machine, characterized in that: The chuck device includes a chuck frame (4), on which a movable chuck (1) and a hollow chuck (2) are slidably connected. A fixed chuck (3) is fixed on the chuck frame (4) at one end of the chuck guide rail (41). The movable chuck (1) and the fixed chuck (3) are located on both sides of the hollow chuck (2). The movable chuck (1) can feed material to the hollow chuck (2) and can pull out the processed pipe fitting from the hollow chuck (2). When the movable chuck (1) feeds material to the hollow chuck (2), the movable chuck (1) and the fixed chuck (3) cooperate with each other to accurately position the pipe fitting on the hollow chuck (2). The hollow chuck (2) can fix the pipe fitting and can drive the pipe fitting to rotate for processing. The hollow chuck (2) includes a hollow chuck base (21) and an active turntable (211). The hollow chuck base (21) is fixedly mounted on a hollow chuck slide plate (219), and the hollow chuck slide plate (219) is slidably connected to the chuck guide rail (41) via a slider. The hollow chuck slide plate (219) drives the active turntable (211) to slide linearly back and forth along the setting direction of the chuck guide rail (41) through the hollow chuck base (21). The end face of the active turntable (211) is provided with a ring around the hollow hole. The pipe positioning mechanism has an active turntable (211) connected to a hollow chuck base (21) via roller bearings. The inner ring (22) of the roller bearing is fixedly connected to the hollow chuck base (21), and the outer ring (23) of the roller bearing is fixedly connected to the active turntable (211). The gear at the output end of the reducer of the turntable drive mechanism (210) located in the hollow chuck base (21) meshes with the gear on the circumferential surface of the outer ring (23) of the bearing to drive the outer ring (23) of the bearing to rotate the active turntable (211). The pipe positioning mechanism includes at least three anti-slip claws. The anti-slip claws are arranged around the hollow hole of the active turntable (211), and the front end of the anti-slip claws is provided with an anti-slip clip (216) or a contour block clip (217) to better clamp and fix the pipe fittings. The anti-slip claws include a fixed claw (214) and an adjustable claw (215). The fixed claw (214) is fixedly connected to the active turntable (211) through a claw fixing block (2141), and the adjustable claw (215) is slidably connected to the active turntable (211) through a claw slider (2151). The adjustable claw (215) set at the front end of the claw cylinder can move along the radial direction of the active turntable (211) within the range defined by the claw slider (2151) to adapt to the fixing of pipes of different diameters. The hollow chuck (2) further includes a driven turntable (212). The center hole of the driven turntable (212) is fixedly connected to the center hole of the driving turntable (211) through a connecting cylinder (213). The driving turntable (211) drives the driven turntable (212) to rotate synchronously through the connecting cylinder (213). The end face of the driven turntable (212) away from the driving turntable (211) is provided with a pipe fitting auxiliary positioning mechanism around the hollow hole. The pipe fitting auxiliary positioning mechanism includes at least three anti-slip claws. The anti-slip claws are arranged around the hollow hole of the driven turntable (212), and the front end of the anti-slip claws is provided with a pulley head (218) so that the pipe fittings can slide better when being fed or unloaded and can play an auxiliary clamping role. The movable chuck (1) includes a movable chuck base (11), a feeding assembly (12), and a retraction assembly (13). The movable chuck base (11) is fixedly installed on the movable chuck slide plate (14), and the movable chuck slide plate (14) is slidably connected to the chuck guide rail (41) through a slider. Under the driving action of the movable chuck drive mechanism (10), the movable chuck slide plate (14) can drive the movable chuck base (11) to move back and forth along the chuck guide rail (41). The feeding assembly (12) can feed material to the hollow chuck (2), and the retraction assembly (13) can pull the processed pipe fitting out of the hollow chuck (2). The feeding assembly (12) is located on the side opposite to the movable chuck (1) and the hollow chuck (2). The feeding assembly (12) includes a feeding clamping head (121) arranged opposite to each other. The feeding clamping head (121) can open and close under the drive of the corresponding cylinder to clamp or release one end of the pipe. After the feeding assembly (12) clamps the end of the pipe, the movable chuck (1) drives the feeding assembly (12) to move closer to the hollow chuck (2), so that the other end of the pipe passes through the hollow hole of the hollow chuck (2) to the set position and completes the feeding. The ejection assembly (13) includes an ejection bracket (131) and an ejection clamping head (132). One end of the ejection bracket (131) is fixedly connected to the movable chuck (1) and the ejection bracket (131) is perpendicular to the end face of the movable chuck (1). The other end of the ejection bracket (131) is provided with an ejection clamping head (132) that is arranged opposite to it. The ejection clamping head (132) performs opening and closing movements under the drive of the corresponding cylinder to clamp or release one end of the pipe fitting. After the ejection assembly (13) clamps the end of the pipe fitting, the movable chuck (1) drives the ejection assembly (13) to move away from the hollow chuck (2), so that the other end of the pipe fitting exits from the hollow hole of the hollow chuck (2) to the set position, thus completing the ejection. The movable chuck (1) is provided with a movable chuck positioning block (122) and a movable chuck positioning push rod (123) located between the feeding clamp head (121). The movable chuck positioning push rod (123) is located at the output end of the movable chuck push rod cylinder (1231) so that the movable chuck positioning push rod (123) can extend and retract relative to the movable chuck base (11). The fixed chuck (3) is provided with a fixed chuck positioning block (311) and a fixed chuck positioning push rod (312) on the fixed chuck base (31). The fixed chuck positioning push rod (312) is located at the output end of the fixed chuck push rod cylinder (3121) so that the fixed chuck positioning push rod (312) can extend and retract relative to the fixed chuck base (31). The fixed chuck positioning block (311) is used to cooperate with the movable chuck positioning push rod (123) for positioning, and the fixed chuck positioning push rod (312) is used to cooperate with the movable chuck positioning block (122) for positioning.

2. The chuck device for a laser tube cutting machine according to claim 1, characterized in that: The movable chuck (1) is provided with a movable chuck drive mechanism (10) that can be linked with it. The movable chuck (1) and the movable chuck drive mechanism (10) are both fixedly mounted on the movable chuck slide plate (14). The output gear of the movable chuck drive mechanism (10) is meshed with the guide rack (42) provided between the chuck guide rail (41). The output gear of the movable chuck drive mechanism (10) drives the movable chuck slide plate (14) to drive the movable chuck (1) and the movable chuck drive mechanism (10) to slide back and forth linearly along the setting direction of the chuck guide rail (41) by rotating forward and reverse.

3. The chuck device for a laser tube cutting machine according to claim 1, characterized in that: The hollow chuck (2) is provided with a hollow chuck drive mechanism (20) that can be linked with it. Both the hollow chuck (2) and the hollow chuck drive mechanism (20) are fixedly mounted on the hollow chuck slide plate (219). The output gear of the hollow chuck drive mechanism (20) is meshed with the guide rack (42) provided between the chuck guide rail (41). The output gear of the hollow chuck drive mechanism (20) drives the hollow chuck slide plate (219) to drive the hollow chuck (2) and the hollow chuck drive mechanism (20) to slide linearly back and forth along the setting direction of the chuck guide rail (41) by rotating forward and reverse.

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