High-precision pipe cutting machine

Abstract

The utility model relates to laser cutting technical field especially relates to a high -precision cut pipe machine, it includes a plurality of base and a plurality of follow -up support subassembly, and each follow -up support subassembly includes lifting assembly, support platform, support unit and clamping unit, and support platform sets up in the drive end of lifting assembly, and the support gyro wheel of support unit is rotatable and sets up on support platform, and clamping unit includes two clamping gyro wheel and clamping adjusting assembly, and two clamping gyro wheel rotatable sets up on clamping adjusting assembly, and clamping adjusting assembly is used for driving two clamping gyro wheel to be close to each other or away from each other, and the support gyro wheel and two clamping gyro wheel commonly form three point holding structure to allow the circumferential rotation and axial movement of pipe material. The lower support gyro wheel and both sides clamping gyro wheel commonly position pipe material, effectively offset dead weight deflection, ensure that pipe material always keeps preset axis in the cutting process, reduce cutting error, and the rolling contact of gyro wheel and pipe material avoids scratching.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting technology, and in particular to a high-precision tube cutting machine. Background Technology

[0002] In traditional laser cutting of long tubes, the weight of the tube causes significant sagging, especially between the two fixed chucks. This sagging alters the distance between the cutting head and the tube surface, affecting cutting quality and even causing collisions. While traditional fixed support structures can support the tube, they hinder circumferential rotation and axial feed during operations such as beveling and circumferential cutting, failing to meet complex cutting requirements. Furthermore, some rigid supports slide directly into the tube, easily causing scratches on the surface and damaging the workpiece's appearance and surface finish. Utility Model Content

[0003] The technical problem to be solved by this utility model is to solve at least one of the technical problems mentioned above.

[0004] The solution to the technical problem of this utility model is: a high-precision pipe cutting machine, comprising a frame, a gantry mounted on the frame, a laser cutting assembly mounted on the gantry, and a first chuck assembly, a second chuck assembly, and a third chuck assembly slidably mounted on the frame along the pipe feeding direction; it also includes multiple bases and multiple follower support assemblies, the multiple bases being sequentially and spaced apart along the pipe feeding direction on the front side of the frame, and the follower support assemblies being correspondingly mounted on the bases. Each set of follower support assemblies includes a lifting assembly, a support platform, a support unit, and a clamping unit. The lifting assembly is mounted on the base, and the support platform is mounted on the drive end of the lifting assembly. The lifting assembly is used to drive the support platform to rise vertically. The support unit includes support rollers, which are mounted on the support platform and rotatable relative to it. The rolling axis of the support rollers is perpendicular to the pipe feeding direction. The clamping unit includes two clamping rollers and a clamping adjustment assembly, which is mounted on the support platform. The two clamping rollers are mounted on the clamping adjustment assembly and rotatable relative to it. The rolling axes of the two clamping rollers are perpendicular to the pipe feeding direction. The two clamping rollers together define a clamping space to limit the lateral position of the pipe. The clamping adjustment assembly is used to adjust the lateral dimension of the clamping space. The support rollers and the two clamping rollers together form a three-point support structure to allow circumferential rotation and axial movement of the pipe.

[0005] As a further improvement to the above technical solution, the lifting assembly includes a first motor, a first gear, a first slide rail, and a first rack. The first slide rail is vertically mounted on the base, and the support platform is slidably connected to the first slide rail. The first rack is mounted on the base and parallel to the first slide rail. The first motor is mounted on the support platform, and the first gear is coaxially rotatably mounted with the output end of the first motor. The first gear meshes with the first rack, and the first motor is used to drive the support platform to reciprocate along the first slide rail.

[0006] As a further improvement to the above technical solution, the lifting assembly also includes a first switch, a second switch, a sensing plate, and a positioning structure; the first switch is fixedly installed on the top of the base, the second switch is fixedly installed on the bottom of the base, the sensing plate is installed on the support platform through the positioning structure, and both the first switch and the second switch are electrically connected to the first motor. When the first motor drives the support platform to move to the limit position of the frame, the sensing plate triggers the first switch or the second switch, and the first motor stops running.

[0007] As a further improvement to the above technical solution, the positioning structure includes an L-shaped plate composed of a first plate and a second plate, a first bolt, and a second bolt; the first plate of the L-shaped plate is threadedly connected to the support platform by the first bolt, and the second plate of the L-shaped plate has two oblong holes, the second bolt is slidably inserted into the oblong holes, and the second bolt is threadedly connected to the sensing plate.

[0008] As a further improvement to the above technical solution, the first motor has an automatic brake-holding function in case of power failure.

[0009] As a further improvement to the above technical solution, the clamping adjustment assembly includes a second motor, a drive rod, a second slide rail, a third slide rail, two connecting rods, two clamping arms, and two first bearings. The second slide rail is vertically arranged on the support platform. The drive rod is slidably connected to the second slide rail. The third slide rail is arranged on the support platform and its extension direction is perpendicular to the tube feeding direction. The two clamping arms are slidably connected to the third slide rail respectively. One end of each connecting rod is hinged to a clamping arm, and the other end of each connecting rod is hinged to the center of the drive rod. The two first bearings are respectively arranged on the clamping arms. The two clamping rollers are rotatably connected to the clamping arms through the two first bearings respectively. The second motor is arranged on the support platform, and the output end of the second motor is fixedly connected to the drive rod.

[0010] As a further improvement to the above technical solution, the support unit further includes two inner rods, two springs, and two bearing seats. The inner rods are fixed to the support platform, and the two bearing seats are respectively sleeved on the two inner rods. The two ends of the support roller are respectively disposed on the two bearing seats and can rotate relative to the bearing seats. The two springs are respectively sleeved on the two inner rods, one end of the two springs is connected to the bottom of the two bearing seats, and the other end of the springs is connected to the support platform. The springs have a tendency to push the bearing seats away from the support platform.

[0011] As a further improvement to the above technical solution, the outer surfaces of both the support roller and the clamping roller are provided with an anti-slip and wear-resistant layer.

[0012] The beneficial effects of this utility model are as follows: the frame and gantry provide basic support; the first, second, and third chuck assemblies slide along the feed direction to realize the axial conveying of the pipe material, while driving the pipe material to rotate circumferentially, and cooperating with the laser cutting assembly to complete cutting at different angles; the base provides an installation benchmark for the follow-up support assembly; the lifting assembly drives the support platform to rise and fall vertically, adjusting the support height to adapt to the lifting requirements of pipe materials of different diameters; the support unit lifts the pipe material from below, allowing the pipe material to rotate circumferentially and slide axially with low friction through its own rotation, bearing the main vertical load of the pipe material; the two clamping rollers of the clamping unit limit the lateral position of the pipe material from both sides to prevent the pipe material from shifting to the left or right; the clamping adjustment assembly can adjust the distance between the two rollers to adapt to pipe materials of different diameters. The three-point support structure uses the lower support roller and the two side clamping rollers to jointly position the tube, effectively offsetting its own weight deflection and ensuring that the tube always maintains the preset axis during the cutting process, reducing cutting errors. All support and clamping components are roller-type designs, using rolling friction instead of sliding friction. This allows the tube to rotate freely in the circumference to meet multi-angle cutting needs, while also achieving low-resistance axial feed without affecting the processing action. The rolling contact between the rollers and the tube significantly reduces surface friction and avoids scratches, making it especially suitable for precision tubes with high surface finish requirements. Multiple follow-up support components are spaced along the feed direction and can be flexibly activated according to the tube length to form segmented support, further suppressing vibration and deformation of long tubes. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0014] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0015] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0016] Figure 4This is a schematic diagram of the structure of the third chuck assembly according to one embodiment of the present invention.

[0017] Reference numerals in the attached drawings: 100-Frame, 110-Gantry, 120-Laser cutting assembly, 130-First chuck assembly, 140-Second chuck assembly, 141-First roller, 142-Second roller, 150-Third chuck assembly, 151-Gripper, 200-Base, 300-Lifting assembly, 310-First motor, 330-First slide rail, 340-First rack, 350-First switch, 360-Second switch, 370-Positioning structure. 371-First plate, 372-Second plate, 373-Oval hole, 400-Support platform, 500-Support unit, 510-Support roller, 520-Inner rod, 530-Spring, 540-Bearing seat, 600-Clamping unit, 610-Clamping roller, 620-Clamping adjustment assembly, 621-Second motor, 622-Drive rod, 623-Second slide rail, 624-Third slide rail, 625-Connecting rod, 626-Clamping arm, 627-First bearing. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments have been briefly explained above. Obviously, the described drawings are only a part of the embodiments of this utility model, not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0019] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages mentioned herein do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0020] In traditional laser cutting of long tubes, the weight of the tube causes significant sagging, especially between the two fixed chucks. This sagging alters the distance between the cutting head and the tube surface, affecting cutting quality and even causing collisions. While traditional fixed support structures can support the tube, they hinder circumferential rotation and axial feed during operations such as beveling and circumferential cutting, failing to meet complex cutting requirements. Furthermore, some rigid supports slide directly into the tube, easily causing scratches on the surface and damaging the workpiece's appearance and surface finish.

[0021] Therefore, this utility model proposes a high-precision tube cutting machine, referring to... Figures 1-2 It includes a frame 100, a gantry 110 mounted on the frame 100, a laser cutting assembly 120 mounted on the gantry 110, and a first chuck assembly 130, a second chuck assembly 140, and a third chuck assembly 150 sequentially slidably mounted on the frame 100 along the tube feeding direction; it also includes multiple bases 200 and multiple follower support assemblies. The multiple bases 200 are sequentially spaced along the tube feeding direction on the front side of the frame 100. The follower support assemblies are correspondingly mounted on the bases 200. Each set of follower support assemblies includes a lifting assembly 300, a support platform 400, a support unit 500, and a clamping unit 600. The lifting assembly 300 is mounted on the base 200, and the support platform 400 is mounted on the drive end of the lifting assembly 300. The lifting assembly 300 is used to drive the support platform 400 to move vertically. The unit 500 includes a support roller 510, which is mounted on the support platform 400 and rotatable relative to the support platform 400. The rolling axis of the support roller 510 is perpendicular to the pipe feeding direction. The clamping unit 600 includes two clamping rollers 610 and a clamping adjustment assembly 620, which is mounted on the support platform 400. The two clamping rollers 610 are mounted on the clamping adjustment assembly 620 and rotatable relative to the clamping adjustment assembly 620. The rolling axes of the two clamping rollers 610 are perpendicular to the pipe feeding direction. The two clamping rollers 610 together define a clamping space to limit the lateral position of the pipe. The clamping adjustment assembly 620 is used to adjust the lateral dimension of the clamping space. The support rollers 510 and the two clamping rollers 610 together form a three-point support structure to allow circumferential rotation and axial movement of the pipe.

[0022] The frame 100 and gantry 110 provide basic support. The first, second, and third chuck assemblies 150 slide along the feed direction to realize the axial transport of the pipe material, while driving the pipe material to rotate circumferentially, and cooperate with the laser cutting assembly 120 to complete cutting at different angles. The base 200 provides an installation reference for the follow-up support assembly. The lifting assembly 300 drives the support platform 400 to lift vertically, adjust the support height, and adapt to the lifting requirements of pipe materials of different diameters. The support unit 500 lifts the pipe material from below, and allows the pipe material to rotate circumferentially and slide axially with low friction through its own rotation, bearing the main vertical load of the pipe material. The two clamping rollers 610 of the clamping unit 600 limit the lateral position of the pipe material from both sides to prevent the pipe material from shifting to the left or right. The clamping adjustment assembly 620 can adjust the distance between the two rollers to adapt to pipe materials of different diameters. The three-point support structure uses the lower support roller 510 and the two side clamping rollers 610 to jointly position the tube, effectively offsetting its own weight deflection and ensuring that the tube always maintains the preset axis during the cutting process, reducing cutting errors. All support and clamping components are roller-type designs, using rolling friction instead of sliding friction. This allows the tube to rotate freely in the circumference to meet multi-angle cutting needs, while also achieving low-resistance axial feed without affecting the processing action. The rolling contact method between the rollers and the tube significantly reduces surface friction and avoids scratches, making it especially suitable for precision tubes with high surface requirements. Multiple follow-up support components are spaced along the feed direction and can be flexibly activated according to the tube length to form segmented support, further suppressing vibration and deformation of long tubes.

[0023] The pipe to be cut is loaded onto the follow-up support assembly. The lifting components 300 of all follow-up support assemblies drive the support platform 400 to rise until the support rollers 510 contact the bottom of the pipe and provide stable support. Then, the clamping units 600 of all follow-up support assemblies activate, and the clamping adjustment components 620 drive the two clamping rollers 610 to move closer to the pipe until they are in contact with both sides of the pipe, forming a three-point positioning to limit lateral displacement of the pipe. The support platform 400 and the pipe are then lifted together until the pipe axis is completely aligned with the central axes of the first, second, and third chucks. When the pipe overlaps, it will be clamped by the first chuck assembly 130 and the second chuck assembly 140, and the first chuck assembly 130 will push the pipe forward toward the laser cutting assembly 120 to achieve cutting feed. During the feeding process, the pipe rolls forward on the support roller 510 and the clamping roller 610, with low frictional resistance. Each follow-up support assembly can be raised and lowered independently according to the feeding position, avoiding the first chuck assembly 130 and providing continuous support for the overhang section. The cut pipe section will be clamped by the third chuck assembly 150 and transferred to the unloading area to complete the unloading. When the remaining length of the pipe is short and the first chuck can no longer hold it, the third chuck moves forward to hold the tail end of the pipe. The second chuck assembly 140 moves to the side of the laser cutting assembly 120 away from the third chuck assembly 150 to assist in clamping. At this time, the tail material is clamped from both ends by the third chuck assembly 150 and the second chuck assembly 140. The laser cutting assembly 120 cuts the last tail material. Because it is clamped from both ends, even a very short tail material can be processed stably.

[0024] During the lifting and lowering process, the support platform 400 is prone to jamming, shaking, or lateral displacement, which may lead to uneven contact between the support rollers 510 and the pipe material, causing scratches on the pipe surface. Therefore, in one embodiment, the lifting assembly 300 includes a first motor 310, a first gear, a first slide rail 330, and a first rack 340. The first slide rail 330 is vertically arranged on the base 200, and the support platform 400 is slidably connected to the first slide rail 330. The first rack 340 is arranged on the base 200 and parallel to the first slide rail 330. The first motor 310 is arranged on the support platform 400, and the first gear is coaxially rotatably arranged with the output end of the first motor 310. The first gear meshes with the first rack 340, and the first motor 310 is used to drive the support platform 400 to reciprocate along the first slide rail 330. The first motor 310 drives the first gear to mesh along the first rack 340 parallel to the slide rail. The gear and rack transmission has the characteristics of stable transmission ratio and high precision. Combined with the guiding effect of the first slide rail 330 on the support platform 400, it can realize the precise lifting and lowering of the support platform 400 in the vertical direction. It can be precisely adjusted to the lifting height required for pipes of different diameters, with a wide range of adaptability to meet diverse processing needs. The first slide rail 330 is slidably connected to the support platform 400, providing smooth guidance for the lifting and lowering movement and avoiding the jamming problem of traditional structures. The gear and rack transmission has good mechanical rigidity and low vibration during operation, which can ensure the smooth lifting and lowering of the support platform 400. At the same time, the motor drive has a rapid response and can quickly complete the height adjustment according to the needs of the follow-up support component to avoid the chuck or the lifting cantilever section, improving the flexibility of the follow-up support.

[0025] The support platform 400 may exceed its safe lifting range due to control errors or malfunctions, causing interference between the support platform 400 and chuck components, pipes, etc., leading to equipment failure. Therefore, in one embodiment, the lifting assembly 300 further includes a first switch 350, a second switch 360, a sensing element, and a positioning structure 370; the first switch 350 is fixedly installed on the top of the base 200, the second switch 360 is fixedly installed on the bottom of the base 200, the sensing element is installed on the support platform 400 through the positioning structure 370, and both the first switch 350 and the second switch 360 are electrically connected to the first motor 310. When the first motor 310 drives the support platform 400 to the limit position of the frame 100, the sensing element triggers the first switch 350 or the second switch 360, and the first motor 310 stops running. By cooperating with the first switch 350, the second switch 360, and the sensing plate, the lifting limit position of the support platform 400 can be accurately detected. When the support platform 400 rises to the top of the base 200 or falls to the bottom limit of the base 200, the sensing plate triggers the corresponding switch, and the first motor 310 immediately stops running. This effectively prevents the support platform 400 from overtravel and collision, avoids motor overload, and prevents damage to gears, racks, or slide rails due to impact, thus extending the service life of the lifting assembly 300. Compared with the hard impact of mechanical stops, the stop response triggered by electronic switches is gentler and without violent collisions. This ensures that the support platform 400 stops smoothly at the limit position, avoids displacement of the pipe during the lifting process due to impact, ensures the coincidence of the pipe axis and the chuck center axis, and indirectly maintains the cutting accuracy.

[0026] Installation errors can cause misalignment of the sensor element, potentially leading to premature shutdown before reaching the limit, affecting the lifting stroke, or shutdown only after exceeding the limit, resulting in a collision. Therefore, in one embodiment, the positioning structure 370 includes an L-shaped plate composed of a first plate 371 and a second plate 372, a first bolt, and a second bolt. The first plate 371 of the L-shaped plate is threadedly connected to the support platform 400 via the first bolt. The second plate 372 of the L-shaped plate has two oblong holes 373, and the second bolt is slidably inserted into the oblong holes 373. The second bolt is threadedly connected to the sensor element. By engaging the oblong hole 373 with the second bolt, the position of the sensor element can be adjusted along the length of the oblong hole 373. This corrects for positional deviations caused by installation errors or component wear, ensuring that the sensor element accurately triggers the switch when the support platform 400 reaches its limit position, avoiding premature or delayed triggering and improving the reliability of limit protection. The adjustable range of the oblong hole 373 provides installation space for sensor elements of different sizes and thicknesses. There is no need to replace the positioning structure 370; simply adjusting the position of the second bolt in the oblong hole 373 is sufficient to accommodate various specifications of sensor elements, reducing the use of special accessories and lowering maintenance costs. The L-shaped plate is fixed to the support platform 400 by the first bolt, and the sensor element is connected to the L-shaped plate by the second bolt. During adjustment, there is no need for complete disassembly, reducing operational difficulty and saving adjustment time.

[0027] After a power outage, the support platform 400 may slide freely along the slide rail due to the weight of the pipe and the inertia of the components, potentially colliding with the bottom of the base 200. Therefore, in one embodiment, the first motor 310 has an automatic brake function in case of power failure. The first motor 310 has an automatic brake function in case of power failure. Once the motor is powered off, the brake device will be activated immediately, mechanically locking the motor output shaft to prevent the support platform 400 from sliding down due to its own weight or inertia. This effectively avoids problems such as the support platform 400 colliding with the base 200, pipe displacement, or falling, improving the safety of the equipment under abnormal working conditions. During the pipe lifting process, if a temporary stop for adjustment is required, the power-off brake can firmly lock the height of the support platform 400, preventing it from slowly sliding down due to minor external forces or pipe pressure. This ensures that the pipe is always at the preset lifting height, maintaining the alignment of the pipe axis with the chuck center axis, providing a stable guarantee for subsequent cutting accuracy.

[0028] The moving speed and distance of the clamping rollers 610 on both sides may be inconsistent, resulting in uneven contact between the clamping rollers 610 and the tube, causing lateral positioning displacement of the tube and affecting cutting accuracy. Therefore, in one embodiment, the clamping adjustment assembly 620 includes a second motor 621, a drive rod 622, a second slide rail 623, a third slide rail 624, two connecting rods 625, two clamping arms 626, and two first bearings 627. The second slide rail 623 is vertically arranged on the support platform 400, the drive rod 622 is slidably connected to the second slide rail 623, the third slide rail 624 is arranged on the support platform 400 and its extension direction is perpendicular to the tube feeding direction, and the two clamping arms 626 are... The connecting rod 625 is not slidably connected to the third slide rail 624. One end of each connecting rod 625 is hinged to the clamping arm 626. The other ends of the two connecting rods 625 are hinged to the center of the drive rod 622. The two first bearings 627 are respectively disposed on the clamping arm 626. The two clamping rollers 610 are rotatably connected to the clamping arm 626 through the two first bearings 627. The second motor 621 is disposed on the support platform 400. The output end of the second motor 621 is fixedly connected to the drive rod 622. Through the symmetrical transmission structure of the drive rod 622 and the double connecting rods 625, when the second motor 621 drives the drive rod 622 to move along the second slide rail 623, the two connecting rods 625 will synchronously drive the clamping arms 626 on both sides to slide along the third slide rail 624, ensuring that the distance between the clamping rollers 610 on both sides is symmetrically adjusted, avoiding unilateral offset, keeping the tube in the center positioning position, improving the lateral positioning accuracy, and ensuring the stability of the tube axis during cutting; the first bearing 627 keeps the clamping rollers 610 and the clamping arms 626 rotating flexibly, and with the uniform contact brought by the symmetrical adjustment, there is stable rolling friction between the tube and the rollers, without jamming or uneven force, ensuring smooth circumferential rotation and axial feed of the tube, without affecting the accuracy of complex cutting actions. The second motor 621 drives the drive rod 622 to move along the second slide rail 623, and through the connecting rods 625 drives the clamping arms 626 to slide along the third slide rail 624, thereby adjusting the distance between the two clamping rollers 610.

[0029] When the pipe material has a diameter deviation or vibrates, excessive local pressure may cause indentations, scratches, or deformation on the pipe surface. Therefore, in one embodiment, the support unit 500 further includes two inner rods 520, two springs 530, and two bearing seats 540. The inner rods 520 are fixed on the support platform 400. The two bearing seats 540 are respectively sleeved on the two inner rods 520. The two ends of the support roller 510 are respectively disposed on the two bearing seats 540 and can rotate relative to the bearing seats 540. The two springs 530 are respectively sleeved on the two inner rods 520. One end of each spring 530 is connected to the bottom of the two bearing seats 540, and the other end of each spring 530 is connected to the support platform 400. The springs 530 have a tendency to push the bearing seats 540 away from the support platform 400. Through the upward thrust of the spring 530 on the bearing seat 540, the support roller 510 forms an elastic contact with the tube material, rather than a rigid collision. When the tube material has diameter deviation, bending, or vibration, the spring 530 can adaptively adjust the support height through its own extension and contraction, ensuring that the support roller 510 is always in contact with the tube material surface and the pressure is uniform. This avoids excessive local pressure that could cause indentations, deformation, or scratches on the tube material surface, making it particularly suitable for precision tube processing. For tube materials with slight bending or diameter fluctuations, the elastic force of the spring 530 can push the bearing seat 540 to slide up and down along the inner rod 520, causing the support roller 510 to adjust its height in real time. This ensures that the support roller 510 always effectively supports the tube material, avoiding support failure caused by local protrusions or depressions in the tube material, and adapting to more complex tube material processing scenarios.

[0030] Slippage may occur during pipe rotation or feeding, causing deviations in the actual movement speed of the pipe. Therefore, in one embodiment, the outer surfaces of both the support roller 510 and the clamping roller 610 are provided with an anti-slip and wear-resistant layer. The anti-slip and wear-resistant layer directly increases the coefficient of friction between the roller and the pipe surface, providing stable friction even when the pipe rotation or feed speed changes, effectively preventing pipe slippage, ensuring synchronization between pipe movement and chuck drive, improving the accuracy of the cutting trajectory, and reducing cutting errors caused by slippage. The anti-slip and wear-resistant layer is made of epoxy resin synthetic material, but wear-resistant rubber or other materials can also be used.

[0031] Preferred, Reference Figures 3-4The second chuck assembly 140 is provided with a set of four first rollers 141 arranged in a circumferential array and a set of four second rollers 142 arranged in a circumferential array. The third chuck assembly 150 is provided with a set of four grippers 151 arranged in a circumferential array. The first roller 141 and the second roller 142 of the second chuck assembly 140 contact the tube material through multi-directional roller contact, providing stable radial support while allowing the tube material to rotate freely in the circumferential direction and feed axially. This solves the contradiction of traditional jaws 151 providing stable clamping but restricting movement, or pure rollers allowing movement but weak clamping, making it suitable for complex cutting requirements such as bevels and circumferential seams. The jaws 151 of the third chuck assembly 150 provide rigid clamping and can work with the roller group of the second chuck to achieve segmented clamping. At the same time, the second chuck is fixed in position, while the third chuck can be moved to the left side of the laser cutting assembly 120, so that all three chucks act on the tube material simultaneously. This is especially suitable for cutting the middle section of long tube materials or processing short tail materials, avoiding tube material vibration caused by insufficient clamping points and improving cutting stability. The roller group of the second chuck contacts the tube material through rolling friction. When the tube material is pushed by the first or third chuck, the rollers rotate synchronously with the tube material, reducing pushing resistance and avoiding scratches on the tube material surface caused by rigid friction. This is especially suitable for tube materials with high surface precision requirements.

[0032] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A high-precision pipe cutting machine, comprising a frame, a gantry mounted on the frame, a laser cutting assembly mounted on the gantry, and a first chuck assembly, a second chuck assembly, and a third chuck assembly sequentially slidably mounted on the frame along the pipe feeding direction; characterized in that, It also includes multiple bases and multiple follower support assemblies. The bases are sequentially and spaced apart along the tube feeding direction on the front side of the frame. Each follower support assembly is correspondingly mounted on a base. Each follower support assembly includes a lifting assembly, a support platform, a support unit, and a clamping unit. The lifting assembly is mounted on the base, and the support platform is located at the drive end of the lifting assembly. The lifting assembly drives the support platform to move vertically up and down. The support unit includes support rollers, which are mounted on the support platform and can rotate relative to it. The moving axis is perpendicular to the pipe feeding direction. The clamping unit includes two clamping rollers and a clamping adjustment assembly. The clamping adjustment assembly is disposed on the support platform. The two clamping rollers are disposed on the clamping adjustment assembly and can rotate relative to the clamping adjustment assembly. The rolling axes of the two clamping rollers are perpendicular to the pipe feeding direction. The two clamping rollers together define a clamping space to limit the lateral position of the pipe. The clamping adjustment assembly is used to adjust the lateral dimension of the clamping space. The support roller and the two clamping rollers together form a three-point support structure to allow the pipe to rotate circumferentially and move axially.

2. The high-precision tube cutting machine according to claim 1, characterized in that, The lifting assembly includes a first motor, a first gear, a first slide rail, and a first rack. The first slide rail is vertically mounted on the base. The support platform is slidably connected to the first slide rail. The first rack is mounted on the base and parallel to the first slide rail. The first motor is mounted on the support platform. The first gear is coaxially rotatably mounted with the output end of the first motor. The first gear meshes with the first rack. The first motor drives the support platform to reciprocate along the first slide rail.

3. A high-precision tube cutting machine according to claim 2, characterized in that, The lifting assembly also includes a first switch, a second switch, a sensor plate, and a positioning structure; the first switch is fixedly installed on the top of the base, the second switch is fixedly installed on the bottom of the base, the sensor plate is installed on the support platform through the positioning structure, and both the first switch and the second switch are electrically connected to the first motor. When the first motor drives the support platform to move to the limit position of the frame, the sensor plate triggers the first switch or the second switch, and the first motor stops running.

4. A high-precision tube cutting machine according to claim 3, characterized in that, The positioning structure includes an L-shaped plate composed of a first plate and a second plate, a first bolt, and a second bolt. The first plate of the L-shaped plate is threadedly connected to the support platform by the first bolt. The second plate of the L-shaped plate has two oblong holes, and the second bolt is slidably inserted into the oblong holes. The second bolt is threadedly connected to the sensing plate.

5. A high-precision tube cutting machine according to claim 2, characterized in that: The first motor has an automatic brake-holding function in case of power failure.

6. A high-precision tube cutting machine according to claim 1, characterized in that: The clamping adjustment assembly includes a second motor, a drive rod, a second slide rail, a third slide rail, two connecting rods, two clamping arms, and two first bearings. The second slide rail is vertically arranged on the support platform. The drive rod is slidably connected to the second slide rail. The third slide rail is arranged on the support platform with its extension direction perpendicular to the tube feeding direction. The two clamping arms are slidably connected to the third slide rail respectively. One end of each connecting rod is hinged to a clamping arm, and the other end of each connecting rod is hinged to the center of the drive rod. The two first bearings are respectively arranged on the clamping arms. The two clamping rollers are rotatably connected to the clamping arms through the two first bearings respectively. The second motor is arranged on the support platform, and the output end of the second motor is fixedly connected to the drive rod.

7. A high-precision tube cutting machine according to claim 1, characterized in that: The support unit further includes two inner rods, two springs, and two bearing seats. The inner rods are fixed to the support platform. The two bearing seats are respectively sleeved on the two inner rods. The two ends of the support roller are respectively disposed on the two bearing seats and can rotate relative to the bearing seats. The two springs are respectively sleeved on the two inner rods. One end of the two springs is connected to the bottom of the two bearing seats, and the other end of the springs is connected to the support platform. The springs have a tendency to push the bearing seats away from the support platform.

8. A high-precision tube cutting machine according to claim 1, characterized in that: The outer surfaces of both the support roller and the clamping roller are provided with an anti-slip and wear-resistant layer.

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