A three-chuck laser pipe cutting machine

Abstract

The utility model relates to the technical field of pipe processing, especially a three chuck laser pipe cutting machine, including side hanger, and respectively locate gantry, first chuck subassembly, second chuck subassembly, third chuck subassembly, laser cutting subassembly, a plurality of feeding support devices, a plurality of material receiving devices and a plurality of material guide inclined frames on the side hanger one side, a plurality of material receiving devices and a plurality of material guide inclined frames staggered arrangement in turn, the three chuck laser pipe cutting machine disclosed in the application realizes the cutting of pipe material through the cooperation of three chuck subassembly and laser cutting subassembly, and a plurality of feeding support devices simultaneously assist supporting the section to be processed of pipe material, reduce the shaking of pipe material, improve cutting accuracy, and the pipe product that completes cutting falls on the conveying belt after sequentially passing through material receiving device and material guide inclined frame, prevents causing damage to the conveying belt in the discharging process, and avoids the positional deviation of pipe material when sliding.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to a three-chuck laser pipe cutting machine. Background Technology

[0002] In the field of pipe processing, laser pipe cutting machines have become key equipment for cutting and processing various materials such as metal pipes and composite pipes due to their advantages of high cutting precision, small heat-affected zone, and high processing efficiency. They are widely used in aerospace parts manufacturing, automotive chassis processing, building steel structure production, medical device research and development, and many other industries. However, for existing three-chuck laser pipe cutting machines, due to the large length of the pipes being processed, the chuck alone is insufficient to support the pipes. At the loading end, the pipes bend downwards due to their own weight and are prone to swaying, affecting cutting precision. At the unloading end, the finished pipes, upon falling, generate a large inertial impact force on the conveyor belt and are prone to displacement after the impact, causing the pipes to detach from the conveyor belt.

[0003] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a three-disc laser tube cutting machine to solve the problems of tube support and slippage impact in existing laser tube cutting machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A three-chuck laser tube cutting machine includes a side frame, a gantry frame, a first chuck assembly, a second chuck assembly, a third chuck assembly, a laser cutting assembly, multiple feeding support devices, multiple receiving devices, and multiple guide frames, all respectively disposed on one side of the side frame. The gantry frame is located in the middle of the side frame. The first chuck assembly and the second chuck assembly are movably disposed at both ends of the side frame. The third chuck assembly and the laser cutting assembly are disposed adjacent to each other on the gantry frame. The laser cutting assembly is disposed on the side of the third chuck assembly facing the second chuck assembly. Multiple feeding support devices are sequentially disposed between the first chuck assembly and the third chuck assembly. Multiple receiving devices and multiple guide frames are all disposed between the second chuck assembly and the third chuck assembly. The multiple receiving devices and multiple guide frames are arranged alternately in sequence.

[0006] As described above, in a three-chuck laser tube cutting machine, each of the guide slant frames includes a support leg, a base frame, a slant frame, and a stop device. The slant frame and the stop device are arranged adjacent to each other on the top of the base frame. The slant frame is located at one end of the base frame near the side hanger. One side of both the base frame and the slant frame is connected to the side hanger. The support leg is located at the bottom of the base frame away from the side hanger.

[0007] As described above, in a three-chuck laser tube cutting machine, the stopping device includes a buffer block, a connecting groove, and a driving mechanism. The connecting groove is located at the top of the base frame, the driving mechanism is located inside the base frame, and the buffer block passes through the connecting groove and is connected to the output end of the driving mechanism.

[0008] As described above, in a three-chuck laser tube cutting machine, the buffer block includes a base plate, a baffle, and two reinforcing members. The two reinforcing members are adjacent to each other on the side of the baffle facing away from the inclined frame. The baffle and the two reinforcing members are connected to the base plate through the connecting groove. The driving mechanism includes four guide columns, a first fixed plate, and a driving cylinder. One end of each of the four guide columns is connected to the top of the base frame, and the other end of each of the four guide columns passes through the base plate and is connected to the first fixed plate. The driving cylinder is mounted on the first fixed plate, and the base plate is connected to the output end of the driving cylinder.

[0009] As described above, in a three-chuck laser tube cutting machine, each of the feeding support devices includes a support frame, a lifting seat, a roller support assembly, a connecting frame, a lifting mechanism, and a clamping mechanism. The support frame is connected to the side hanging frame, the lifting seat is located on one side of the support frame, the roller support assembly is located on the top of the lifting seat, the connecting frame is located on the side of the lifting seat facing away from the support frame, and the clamping mechanism is connected to the connecting frame through the lifting mechanism.

[0010] As described above, a three-chuck laser tube cutting machine includes a lifting base comprising a second fixed plate, two first guide rails, a rack, a lifting plate, four first slides, a lifting motor, and a gear. The second fixed plate is connected to the support frame. The two first guide rails are respectively located on the side of the second fixed plate facing away from the support frame. The rack is located between the two first guide rails. Two first slides are slidably mounted on each first guide rail. The lifting plate is mounted on the four first slides. The lifting motor is mounted on the lifting plate. The gear is connected to the output end of the lifting motor. The gear and the rack are meshed together. The connecting frame and the roller support assembly are both located on the lifting plate.

[0011] As described above, a three-chuck laser tube cutting machine includes a lifting mechanism comprising a first support, two second guide rails, four second slides, a lifting cylinder, and a moving plate. The first support is fixed to one side of the connecting frame, the lifting cylinder is mounted on the first support, the two second guide rails are adjacent to each other on the side of the connecting frame facing away from the lifting base, and two second slides are slidably mounted on each second guide rail. The moving plate is mounted on the four second slides and connected to the output end of the lifting cylinder. The clamping mechanism is fixed to the moving plate.

[0012] As described above, a three-chuck laser tube cutting machine includes a clamping mechanism comprising a second support, a clamping cylinder, a third guide rail, two fourth guide rails, two third slides, two fourth slides, a movable frame, two connecting rods, and two clamping rollers. The second support is fixed to the movable plate, the clamping cylinder is mounted on the second support, the third guide rail and the two fourth guide rails are both mounted on one side of the movable plate, the two fourth guide rails are adjacent to each other at the bottom of the movable plate, the third guide rail is laterally mounted on the top of the movable plate, the two third slides are slidably mounted on the third guide rail, the two fourth slides and the two fourth guide rails correspond one-to-one and slide in cooperation, the two clamping rollers are respectively mounted on the two third slides, the movable frame is mounted on the two fourth slides, one end of each of the two connecting rods is coaxially hinged to the movable frame, the other end of each of the two connecting rods is respectively hinged to the two third slides, and the movable frame is hinged to the output end of the clamping cylinder.

[0013] The three-chuck laser tube cutting machine described above further includes a negative pressure bend and a protective net. One end of the negative pressure bend is inserted through the side hanger, and the other end of the negative pressure bend is inserted through the gantry frame. The protective net is installed on the gantry frame and covers the negative pressure bend.

[0014] Beneficial effects: This utility model discloses a three-chuck laser tube cutting machine, including a side hanger, a gantry frame, a first chuck assembly, a second chuck assembly, a third chuck assembly, a laser cutting assembly, multiple feeding support devices, multiple receiving devices, and multiple guide rails, all respectively disposed on one side of the side hanger. The side hanger provides structural support. The first and second chuck assemblies clamp and fix both ends of the tube. The gantry frame provides support for the third chuck assembly and the laser cutting assembly. The third chuck assembly clamps and fixes the middle section of the tube. The laser cutting assembly cuts the tube. The multiple feeding support devices assist the section of the tube to be processed. The machine utilizes a three-chuck laser pipe cutting machine. Multiple receiving devices support the cut pipe sections and transfer them to multiple guide frames, from which the pipes slide down onto the conveyor belt. The machine employs the cooperation of three chuck assemblies and the laser cutting assembly to cut the pipes. Simultaneously, multiple feeding support devices provide auxiliary support to the pipe sections to be processed, reducing pipe sway and improving cutting accuracy. Furthermore, the cut pipe sections pass sequentially through the receiving devices and guide frames before sliding onto the conveyor belt, preventing damage to the conveyor belt during unloading and avoiding positional shifts during the pipe's descent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the three-chuck laser tube cutting machine provided by this utility model; Figure 2 Exploded view of the guide frame provided by this utility model; Figure 3 Exploded view of the feeding support device provided by this utility model; Figure 4 An exploded view of the feeding support device provided by this utility model from another angle; Reference numerals: 1-Side hanger, 2-Gantry frame, 3-First chuck assembly, 4-Second chuck assembly, 5-Third chuck assembly, 6-Laser cutting assembly, 7-Feeding support device, 71-Support frame, 72-Lifting seat, 721-Second fixed plate, 722-First guide rail, 723-Rack, 724-Lifting plate, 725-First slide, 726-Lifting motor, 727-Gear, 73-Roller support assembly, 74-Connecting frame, 75-Lifting mechanism, 751-First bracket, 752-Second guide rail, 753-Second slide, 754-Lifting cylinder, 755-Moving plate, 76-Clamp Holding mechanism, 761-Second bracket, 762-Clamping cylinder, 763-Third guide rail, 764-Fourth guide rail, 765-Third slide, 766-Fourth slide, 767-Modible frame, 768-Connecting rod, 769-Clamping roller, 8-Receiving device, 9-Guiding inclined frame, 91-Support leg, 92-Base frame, 93-Inclined frame, 94-Stop device, 95-Buffer block, 951-Base plate, 952-Baffle, 953-Reinforcing component, 96-Connecting groove, 97-Drive mechanism, 971-Guide column, 972-First fixed plate, 973-Drive cylinder, 10-Negative pressure bend, 11-Protective net. Detailed Implementation

[0016] This utility model provides a three-chuck laser tube cutting machine. To make the purpose, technical solution and effect of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.

[0017] In the description of this utility model, it should be understood that the terms "top" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] like Figure 1-4As shown in the figure, this application proposes a three-chuck laser tube cutting machine, including a side frame 1, and a gantry frame 2, a first chuck assembly 3, a second chuck assembly 4, a third chuck assembly 5, a laser cutting assembly 6, multiple feeding support devices 7, multiple receiving devices 8, and multiple guide frames 9, respectively disposed on one side of the side frame 1. The gantry frame 2 is disposed in the middle of the side frame 1. The first chuck assembly 3 and the second chuck assembly 4 are respectively movably disposed at both ends of the side frame 1. The third chuck assembly 5 and the laser cutting assembly 6 are disposed adjacent to each other on the gantry frame 2. The laser cutting assembly 6 is disposed on the side of the third chuck assembly 5 facing the second chuck assembly 4. Multiple feeding support devices 7 are sequentially disposed between the first chuck assembly 3 and the third chuck assembly 5. Multiple receiving devices 8 and multiple guide frames 9 are all disposed between the second chuck assembly 4 and the third chuck assembly 5. The multiple receiving devices 8 and multiple guide frames 9 are arranged alternately in sequence.

[0019] This utility model discloses a three-chuck laser tube cutting machine, including a side bracket 1, and a gantry frame 2, a first chuck assembly 3, a second chuck assembly 4, a third chuck assembly 5, a laser cutting assembly 6, multiple feeding support devices 7, multiple receiving devices 8, and multiple guide rails 9, all respectively disposed on one side of the side bracket 1. The side bracket 1 provides structural support. The first chuck assembly 3 and the second chuck assembly 4 clamp and fix the two ends of the tube. The gantry frame 2 provides support for the third chuck assembly 5 and the laser cutting assembly 6. The third chuck assembly 5 clamps and fixes the middle section of the tube. The laser cutting assembly 6 cuts the tube. The multiple feeding support devices 7 support the tube to be cut. The processing section provides auxiliary support, and multiple receiving devices 8 support the finished pipe products after cutting, transferring them to multiple guide frames 9, where they slide down the inclined surfaces of the guide frames 9 onto the conveyor belt. This application discloses a three-chuck laser pipe cutting machine that uses the cooperation of three chuck assemblies and the laser cutting assembly 6 to cut pipes. Simultaneously, multiple feeding support devices 7 provide auxiliary support to the pipe section to be processed, reducing pipe sway and improving cutting accuracy. Furthermore, the finished pipe products, after passing through the receiving devices 8 and the guide frames 9, slide down onto the conveyor belt, preventing damage to the conveyor belt during unloading and avoiding positional shifts during pipe sliding.

[0020] Each of the aforementioned guide inclined frames 9 includes a support leg 91, a base frame 92, an inclined frame 93, and a stop device 94. The inclined frame 93 and the stop device 94 are arranged adjacent to each other on the top of the base frame 92. The inclined frame 93 is located at one end of the base frame 92 near the side hanger 1. One side of both the base frame 92 and the inclined frame 93 is connected to the side hanger 1. The support leg 91 is located at the bottom of the base frame 92 away from the side hanger 1. The finished pipe is transferred from the receiving device 8 to the guide inclined frame 9 and slides down the inclined surface of the inclined frame 93. The stop device 94 prevents the pipe from sliding, so that the pipe stops on the base frame 92 and is then conveyed out by the conveyor belt. After sliding down the inclined surface and being blocked by the stop device 94, most of the impact force is offset, ensuring that the pipe contacts the conveyor belt smoothly and is conveyed.

[0021] The stopping device 94 includes a buffer block 95, a connecting groove 96, and a driving mechanism 97. The connecting groove 96 is located at the top of the base frame 92, and the driving mechanism 97 is located inside the base frame 92. The buffer block 95 passes through the connecting groove 96 and is connected to the output end of the driving mechanism 97. The buffer block 95 includes a base plate 951, a baffle 952, and two reinforcing members 953. The two reinforcing members 953 are adjacent to each other on the side of the baffle 952 facing away from the inclined frame 93. The baffle 952 and the two reinforcing members 953 all pass through the connecting groove 96 and are connected to the base plate 951. The driving mechanism 97 includes four guide pillars 971, a first fixing plate 972, and a driving cylinder 973. One end of each of the four guide pillars 971 is connected to the top inside the base frame 92. The other ends of the four guide posts 971 all pass through the base plate 951 and are connected to the first fixed plate 972. The drive cylinder 973 is mounted on the first fixed plate 972. The base plate 951 is connected to the output end of the drive cylinder 973. The drive cylinder 973 drives the buffer block 95 to rise and fall, so as to extend the base frame 92 when it is necessary to restrict the movement of the pipe. During the rising and falling of the buffer block 95, the base plate 951 and the four guide posts 971 cooperate with each other to play a guiding role. When the pipe hits the buffer block 95, the base plate 951 is supported and pulled by the four guide posts 971. At the same time, the two reinforcement parts 953 reinforce the connection between the base plate 951 and the baffle 952, improving the impact resistance and anti-tipping performance of the baffle 952.

[0022] Each of the aforementioned feeding support devices 7 includes a support frame 71, a lifting seat 72, a roller support assembly 73, a connecting frame 74, a lifting mechanism 75, and a clamping mechanism 76. The support frame 71 is connected to the side hanging frame 1. The lifting seat 72 is located on one side of the support frame 71. The roller support assembly 73 is located on the top of the lifting seat 72. The connecting frame 74 is located on the side of the lifting seat 72 facing away from the support frame 71. The clamping mechanism 76 is connected to the connecting frame 74 through the lifting mechanism 75. The lifting seat 72 drives the roller support assembly 73 to rise and fall so that it supports the bottom of the pipe. The lifting mechanism 75 drives the clamping mechanism 76 to engage with both sides of the pipe. The clamping mechanism 76 narrows towards the center to prevent the pipe from shifting left and right during transportation. Furthermore, the roller support assembly 73 and the pipe have rolling friction, which reduces the friction between them, ensures the smooth transportation of the pipe, and prevents damage to the pipe.

[0023] The lifting seat 72 includes a second fixed plate 721, two first guide rails 722, a rack 723, a lifting plate 724, four first slide blocks 725, a lifting motor 726, and a gear 727. The second fixed plate 721 is connected to the support frame 71. The two first guide rails 722 are respectively disposed on the side of the second fixed plate 721 facing away from the support frame 71. The rack 723 is disposed between the two first guide rails 722. Two first slide blocks 725 are slidably disposed on each first guide rail 722. The lifting plate 724 is mounted on the four first slide blocks 725. The lifting motor 726 is disposed on... On the lifting plate 724, the gear 727 is connected to the output end of the lifting motor 726, and the gear 727 is meshed with the rack 723. The connecting frame 74 and the roller support assembly 73 are both mounted on the lifting plate 724. The lifting motor 726 drives the gear 727 to rotate, and the gear 727 and rack 723 mesh to transmit power. The four first slides 725 and the two first guide rails 722 cooperate to guide each other, realizing the lifting of the lifting plate 724 and the roller support assembly 73. With gear transmission, the adjustment accuracy is high and it can accurately adapt to pipes of different diameters.

[0024] The lifting mechanism 75 includes a first bracket 751, two second guide rails 752, four second slide blocks 753, a lifting cylinder 754, and a moving plate 755. The first bracket 751 is fixed to one side of the connecting frame 74. The lifting cylinder 754 is mounted on the first bracket 751. The two second guide rails 752 are adjacent to each other on the side of the connecting frame 74 facing away from the lifting block 72. Two second slide blocks 753 are slidably mounted on each second guide rail 752. The moving plate 755 is mounted on the four second slide blocks 753 and connected to the output end of the lifting cylinder 754. The clamping mechanism 76 is fixed to the moving plate 755. The lifting cylinder 754 drives the moving plate 755 to rise and fall. Through the cooperation between the two second guide rails 752 and the four second slide blocks 753, the moving plate 755 is ensured to rise and fall smoothly.

[0025] The clamping mechanism 76 includes a second bracket 761, a clamping cylinder 762, a third guide rail 763, two fourth guide rails 764, two third slides 765, two fourth slides 766, a movable frame 767, two connecting rods 768, and two clamping rollers 769. The second bracket 761 is fixed to the movable plate 755. The clamping cylinder 762 is mounted on the second bracket 761. The third guide rail 763 and the two fourth guide rails 764 are both located on one side of the movable plate 755. The two fourth guide rails 764 are adjacent to each other at the bottom of the movable plate 755. The third guide rail 763 is horizontally located at the top of the movable plate 755. The two third slides 765 are slidably mounted on the third guide rail 763. The two fourth slides 766 and the two fourth guide rails 764 correspond one-to-one and slide in cooperation. The two clamping rollers 769 are... The movable frame 767 is mounted on two third slide blocks 765 and two fourth slide blocks 766. One end of each of the two connecting rods 768 is coaxially hinged to the movable frame 767, and the other end of each connecting rod 768 is respectively hinged to the two third slide blocks 765. The movable frame 767 is hinged to the output end of the clamping cylinder 762. The third guide rail 763 and the two third slide blocks 765 cooperate to guide the two clamping rollers 769. The two fourth guide rails 764 and the two fourth slide blocks 766 cooperate to guide the movable frame 767. The clamping cylinder 762 drives the movable frame 767 to rise and fall. Through the transmission of the two connecting rods 768, the two third slide blocks 765 are simultaneously driven to move laterally in a direction that moves closer or further away from each other, thereby achieving the clamping of the pipe. The structure has high linkage and ensures the centered clamping of the pipe.

[0026] The three-chuck laser tube cutting machine also includes a negative pressure bend 10 and a protective net 11. One end of the negative pressure bend 10 is inserted into the side bracket 1, and the other end is inserted into the gantry frame 2. The protective net 11 is installed on the gantry frame 2 and covers the negative pressure bend 10. The negative pressure bend 10 is connected to an external fan or air source, and uses negative pressure to adsorb dust or smoke generated during cutting, reducing pollution to the working environment. The protective net 11 is also installed to prevent large particles or animals from entering.

[0027] In this embodiment of the application, the receiving device 8 includes a frame, a lifting assembly, a support plate, a tilting cylinder, and a roller. The lifting assembly is mounted on the frame. One end of the support plate is hinged to the top of the lifting assembly. Both ends of the tilting cylinder are respectively hinged to the lifting assembly and the support plate. The roller is rotatably mounted on the support plate. The lifting cylinder 754, the clamping cylinder 762, and the tilting cylinder are all connected to an external air source.

[0028] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to or identical to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A three-chuck laser tube cutting machine, characterized in that, The system includes a side hanger (1), a gantry (2) respectively disposed on one side of the side hanger (1), a first chuck assembly (3), a second chuck assembly (4), a third chuck assembly (5), a laser cutting assembly (6), multiple feeding support devices (7), multiple receiving devices (8), and multiple guide rails (9). The gantry (2) is located in the middle of the side hanger (1). The first chuck assembly (3) and the second chuck assembly (4) are movably disposed at both ends of the side hanger (1). The third chuck assembly (5) and the laser cutting assembly (6) are respectively disposed on one side of the side hanger (1). The cutting assembly (6) is arranged adjacent to the gantry frame (2). The laser cutting assembly (6) is located on the side of the third chuck assembly (5) facing the second chuck assembly (4). Multiple feeding support devices (7) are arranged sequentially between the first chuck assembly (3) and the third chuck assembly (5). Multiple receiving devices (8) and multiple guide frames (9) are arranged between the second chuck assembly (4) and the third chuck assembly (5). The multiple receiving devices (8) and the multiple guide frames (9) are arranged alternately in sequence.

2. The three-chuck laser tube cutting machine according to claim 1, characterized in that, Each of the aforementioned guide slant frames (9) includes a support leg (91), a base frame (92), a slant frame (93), and a stop device (94). The slant frame (93) and the stop device (94) are arranged adjacent to each other on the top of the base frame (92). The slant frame (93) is located at one end of the base frame (92) near the side hanger (1). One side of the base frame (92) and the slant frame (93) are both connected to the side hanger (1). The support leg (91) is located at the bottom of the base frame (92) away from the side hanger (1).

3. A three-chuck laser tube cutting machine according to claim 2, characterized in that, The stop device (94) includes a buffer block (95), a connecting groove (96) and a drive mechanism (97). The connecting groove (96) is located on the top of the base frame (92), and the drive mechanism (97) is located inside the base frame (92). The buffer block (95) passes through the connecting groove (96) and is connected to the output end of the drive mechanism (97).

4. A three-chuck laser tube cutting machine according to claim 3, characterized in that, The buffer block (95) includes a base plate (951), a baffle (952), and two reinforcing members (953). The two reinforcing members (953) are adjacent to each other on the side of the baffle (952) facing away from the inclined frame (93). The baffle (952) and the two reinforcing members (953) are connected to the base plate (951) through the connecting groove (96). The driving mechanism (97) includes four guide columns (971), a first fixed plate (972), and a driving cylinder (973). One end of each of the four guide columns (971) is connected to the top inside the base frame (92), and the other end of each of the four guide columns (971) passes through the base plate (951) and is connected to the first fixed plate (972). The driving cylinder (973) is located on the first fixed plate (972), and the base plate (951) is connected to the output end of the driving cylinder (973).

5. A three-chuck laser tube cutting machine according to claim 1, characterized in that, Each of the aforementioned feeding support devices (7) includes a support frame (71), a lifting seat (72), a roller support assembly (73), a connecting frame (74), a lifting mechanism (75), and a clamping mechanism (76). The support frame (71) is connected to the side hanging frame (1). The lifting seat (72) is located on one side of the support frame (71). The roller support assembly (73) is located on the top of the lifting seat (72). The connecting frame (74) is located on the side of the lifting seat (72) facing away from the support frame (71). The clamping mechanism (76) is connected to the connecting frame (74) through the lifting mechanism (75).

6. A three-chuck laser tube cutting machine according to claim 5, characterized in that, The lifting seat (72) includes a second fixed plate (721), two first guide rails (722), a rack (723), a lifting plate (724), four first slides (725), a lifting motor (726), and a gear (727). The second fixed plate (721) is connected to the support frame (71). The two first guide rails (722) are respectively located on the side of the second fixed plate (721) facing away from the support frame (71). The rack (723) is located between the two first guide rails (722). Each of the first guide rails (722) is slidably provided with two first slide blocks (725), the lifting plate (724) is mounted on four first slide blocks (725), the lifting motor (726) is mounted on the lifting plate (724), the gear (727) is connected to the output end of the lifting motor (726), the gear (727) and the rack (723) are meshed and connected, and the connecting frame (74) and the roller support assembly (73) are both mounted on the lifting plate (724).

7. A three-chuck laser tube cutting machine according to claim 5, characterized in that, The lifting mechanism (75) includes a first bracket (751), two second guide rails (752), four second slides (753), a lifting cylinder (754), and a moving plate (755). The first bracket (751) is fixed to one side of the connecting frame (74). The lifting cylinder (754) is mounted on the first bracket (751). The two second guide rails (752) are adjacent to each other on the side of the connecting frame (74) facing away from the lifting seat (72). Two second slides (753) are slidably mounted on each second guide rail (752). The moving plate (755) is mounted on the four second slides (753) and connected to the output end of the lifting cylinder (754). The clamping mechanism (76) is fixed on the moving plate (755).

8. A three-chuck laser tube cutting machine according to claim 7, characterized in that, The clamping mechanism (76) includes a second bracket (761), a clamping cylinder (762), a third guide rail (763), two fourth guide rails (764), two third slides (765), two fourth slides (766), a movable frame (767), two connecting rods (768), and two clamping rollers (769). The second bracket (761) is fixed on the movable plate (755), the clamping cylinder (762) is mounted on the second bracket (761), the third guide rail (763) and the two fourth guide rails (764) are all mounted on one side of the movable plate (755), and the two fourth guide rails (764) are adjacent to each other at the bottom of the movable plate (755). 63) The two third slides (765) are slidably mounted on the top of the movable plate (755), and the two fourth slides (766) and the two fourth guide rails (764) are respectively corresponding to each other and slidably engaged. The two clamping rollers (769) are respectively mounted on the two third slides (765). The movable frame (767) is mounted on the two fourth slides (766). One end of the two connecting rods (768) is coaxially hinged to the movable frame (767), and the other end of the two connecting rods (768) is respectively hinged to the two third slides (765). The movable frame (767) is hinged to the output end of the clamping cylinder (762).

9. A three-chuck laser tube cutting machine according to claim 1, characterized in that, The three-chuck laser tube cutting machine also includes a negative pressure bend (10) and a protective net (11). One end of the negative pressure bend (10) is inserted into the side hanger (1), and the other end of the negative pressure bend (10) is inserted into the gantry frame (2). The protective net (11) is installed on the gantry frame (2) and covers the negative pressure bend (10).

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