A laser pipe cutting machine

Abstract

The application belongs to the technical field of laser pipe cutting, and discloses a laser pipe cutting machine, which comprises a machine body, a chuck clamping mechanism slidingly connected to the outer surface of the machine body, and an auxiliary supporting mechanism fixedly installed in the end of the machine body away from the chuck clamping mechanism, and further comprises a movable element arranged on the top of the end of the machine body away from the chuck clamping mechanism, and a laser cutting head slidingly connected to the inside of the movable element. The detection assembly can detect the bending of the pipe before the pipe enters the auxiliary supporting mechanism, timely identify the bending deformation of the pipe generated in the transportation or feeding process, avoid the influence of the bent pipe on the supporting stability of the subsequent auxiliary supporting mechanism and the machining quality of the laser cutting head, and thus effectively improve the yield of pipe cutting machining and the operation reliability of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of laser tube cutting technology, and particularly relates to a laser tube cutting machine. Background Technology

[0002] With the rapid development of modern manufacturing, pipes are increasingly widely used in aerospace, automobile manufacturing, petrochemical, furniture manufacturing, and building decoration, leading to ever-increasing demands for precision, efficiency, and quality in pipe cutting and processing. Traditional processing methods such as sawing, flame cutting, and plasma cutting are gradually becoming insufficient to meet the increasingly stringent requirements of pipe processing. Laser cutting technology, due to its outstanding advantages such as high cutting speed, high precision, small heat-affected zone, and good flexibility, has been increasingly widely used in the field of pipe processing, giving rise to laser pipe cutting machines.

[0003] However, existing laser tube cutting machines have several drawbacks in practical use: First, tubes are prone to bending and deformation during transportation, storage, and loading. When bent tubes directly enter the cutting process, a deviation occurs between the actual axis and the theoretical axis, causing the relative position of the cutting head and the tube surface to deviate from the preset trajectory, resulting in problems such as cutting size deviation and slanted cuts. Second, when it is necessary to correct bent and deformed tubes, the existing correction components cannot simultaneously meet the correction requirements of round or square tubes. The entire correction component needs to be replaced for different tubes, which seriously affects the applicability and ease of use of tube correction. Finally, in the case of tube warping, the laser cutting head may directly impact the tube during movement, causing the ceramic ring to break, the nozzle to be scrapped, or even the focusing lens to shift. There is a lack of a protection mechanism to automatically lift and lock the laser cutting head after a collision, which seriously affects the reliability of the laser tube cutting machine. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a laser tube cutting machine.

[0005] The technical solution is as follows: A laser tube cutting machine includes a machine body and a chuck clamping mechanism slidably connected to the outer surface of the machine body, and further includes: The auxiliary support mechanism is fixedly installed inside the end of the machine body away from the chuck clamping mechanism; The movable part is located at the top of the end of the machine body away from the chuck clamping mechanism; The laser cutting head is slidably connected inside the moving part. The detection component is set on the machine body and includes multiple support components fixedly installed on the outer surface of the machine body. The movable ends of the multiple support components are fixedly connected to a base plate. Both ends of the base plate are slidably connected to a movable frame. Multiple guide rollers are equidistantly slidably connected inside each movable frame. The straightening assembly is mounted on the machine body and includes two support members 2 that are fixedly installed on the outer surface of the machine body. The movable ends of the two support members 2 are fixedly connected to a bracket, and multiple straightening rollers are installed in the bracket in an adjustable position. The protective assembly, mounted on the movable part, includes ear plates fixedly installed at both ends of the laser cutting head. Each ear plate has an L-shaped tube fixedly connected to its top end. The end of each L-shaped tube away from the ear plate is fixedly connected to the outer surface of the laser cutting head. The outer surface of each L-shaped tube is slidably connected to the inside of the movable part.

[0006] Furthermore, the detection assembly also includes multiple elastic elements 1 that are equidistantly fixedly installed on the outer surface of each movable frame. The movable end of each elastic element 1 is fixedly connected to a ring. The upper and lower ends of each guide roller are rotatably connected to the inside of the corresponding two rings. Multiple movable plates are equidistantly slidably connected inside each movable frame. Multiple elastic elements 2 are equidistantly fixedly installed on the outer surface of each movable frame. The upper and lower ends of each movable plate are fixedly connected to the corresponding two elastic elements 2. A pressure sensor is fixedly installed inside each movable plate.

[0007] Furthermore, a swing arm is rotatably connected to the top of the base plate, and connecting rods are rotatably connected to both ends of the swing arm. The end of each connecting rod away from the swing arm is rotatably connected to the corresponding movable frame. An electric cylinder is fixedly installed on the top of the base plate, and the movable end of the electric cylinder is fixedly connected to one of the movable frames.

[0008] Furthermore, the straightening assembly also includes two sleeves that are slidably connected to the outer surface of each straightening roller. Each sleeve has multiple slots circumferentially spaced inside. Each straightening roller has an extrusion member slidably connected inside both ends. Multiple locking blocks 1 are slidably connected circumferentially spaced at the ends of two extrusion members that are close to each other. The outer surface of each locking block 1 is slidably connected to the inside of the corresponding straightening roller. Multiple locking blocks 2 are slidably connected circumferentially spaced at the ends of two extrusion members that are far from each other. The outer surface of each locking block 2 is slidably connected to the inside of the corresponding straightening roller.

[0009] Furthermore, each pair of extrusion parts is connected internally by a bidirectional threaded rod via a threaded connection. Both ends of each bidirectional threaded rod are rotatably connected to the interior of the corresponding correction roller. A drive component is fixedly installed inside one end of each correction roller, and the output end of each drive component is fixedly connected to the corresponding bidirectional threaded rod.

[0010] Furthermore, spring 1 is fixedly installed on the two ends of each card block 1 and card block 2 and the opposite surface of the corresponding correction roller. Multiple guide blocks are fixedly connected circumferentially at equal intervals on the outer surface of each extrusion piece, and the outer surface of each guide block is slidably connected to the inside of the corresponding correction roller.

[0011] Furthermore, the protective assembly also includes multiple springs that are fixedly installed on the top of each ear plate and opposite to the movable part. The movable part has a connecting frame fixedly connected above each L-shaped tube. Each connecting frame has a locking element rotatably connected inside. One end of each locking element is fixedly connected to a magnetic baffle. The outer surface of each magnetic baffle is attached to the corresponding connecting frame.

[0012] Furthermore, each connecting frame has a slidingly connected pressing rod inside, and a rotating part is fixedly connected to the end of each pressing rod away from the locking part. The outer surface of the end of each pressing rod near the rotating part is threaded into the interior of the moving part.

[0013] The beneficial effects of this invention are as follows: It can perform bending detection on the pipe before it enters the auxiliary support mechanism, and promptly identify bending deformations that occur during transportation or loading. This prevents bent pipes from affecting the support stability of the subsequent auxiliary support mechanism and the processing quality of the laser cutting head, thereby effectively improving the yield of pipe cutting and processing and the operational reliability of the equipment. It also ensures that the detection component reduces the damage to the pipe surface caused by rigid collisions while performing bending detection.

[0014] It can simultaneously meet the correction requirements of round or square tubes, and can quickly switch the working mode of the correction roller without replacing the entire correction assembly for different tubes. This effectively improves the applicability and reliability of tube correction. Furthermore, the sleeve is mechanically locked by clamp one or clamp two to prevent the sleeve from moving during the straightening process, thereby effectively improving the working stability of the correction process.

[0015] It can ensure that the laser cutting head actively avoids collisions, effectively preventing problems such as ceramic ring breakage, nozzle failure, or focusing lens displacement caused by continuous force on the laser cutting head. It also automatically locks the laser cutting head after reaching the protection position, preventing it from immediately resetting under the action of the spring restoring force and causing secondary collisions. This effectively reduces the equipment maintenance costs caused by accidental collisions, thereby improving the safety and reliability of the laser tube cutting machine. Attached Figure Description

[0016] Figure 1 The diagram shown is a structural schematic of a laser tube cutting machine; Figure 2 The diagram shows the installation structure of the chuck clamping mechanism; Figure 3 The diagram shows the installation structure of the detection component and the straightening component; Figure 4 The diagram shows the installation structure of the guide roller; Figure 5The diagram shows the installation structure of the pressure sensor; Figure 6 The diagram shown is a schematic of the bracket's installation structure; Figure 7 The diagram shown is a schematic of the installation structure of the second card block; Figure 8 The diagram shown is a schematic of the sleeve installation structure; Figure 9 The diagram shown is a schematic of the installation structure of the extruded component; Figure 10 The diagram shows the installation structure of the rotating component; Figure 11 The diagram shows the mounting structure of the laser cutting head; Figure 12 The diagram shown is a schematic of the installation structure of spring two; Figure 13 The diagram shows the installation structure of the locking component.

[0017] The reference numerals in the accompanying drawings of this invention are as follows: In the diagram: 1. Machine body; 2. Chuck clamping mechanism; 3. Auxiliary support mechanism; 4. Moving parts; 5. Laser cutting head; Detection components: 61. Support component one; 62. Base plate; 63. Moving frame; 64. Guide roller; 65. Elastic component one; 66. Ring; 67. Movable plate; 68. Elastic component two; 69. Pressure sensor; 610. Swing arm; 611. Connecting rod; 612. Electric cylinder; Straightening components: 71. Support component two; 72. Bracket; 73. Straightening roller; 74. Sleeve; 75. Slot; 76. Extrusion component; 77. Slot one; 78. Slot two; 79. Bidirectional threaded rod; 710. Drive component; 711. Spring one; 712. Guide block; Protective components: 81. Ear plate; 82. L-shaped tube; 83. Spring 2; 84. Connecting frame; 85. Locking element; 86. Magnetic baffle; 87. Pressing rod; 88. Rotating element. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0019] This invention provides a laser tube cutting machine, such as... Figures 1 to 13As shown, the system includes a machine body 1 and a chuck clamping mechanism 2 slidably connected to the outer surface of the machine body 1. The machine body 1 is equipped with an X-axis drive mechanism, a Y-axis drive mechanism, a Z-axis drive mechanism, and a CNC machine. The chuck clamping mechanism 2 is slidably connected to the machine body 1 and connected to the drive end of the X-axis drive mechanism. The X-axis drive mechanism drives the chuck clamping mechanism 2 to reciprocate along the X-axis direction of the machine body 1. A Y-axis moving seat is located at the top of the end of the machine body 1 away from the chuck clamping mechanism 2. The Y-axis moving seat is connected to the Y-axis drive mechanism and can move along the Y-axis direction under the drive of the Y-axis drive mechanism. The chuck clamping mechanism 2 consists of a housing, a four-jaw chuck, and a drive motor. The four-jaw chuck is fixedly connected to the output end of the drive motor, which drives the four-jaw chuck to rotate. The four-jaw chuck consists of a chuck body, movable jaws, and a jaw drive mechanism. The four-jaw chuck is used to clamp and fix pipes. The system also includes an auxiliary support mechanism 3, which consists of a support frame, a support... The machine consists of a support roller and a support roller drive mechanism, which are used to provide auxiliary support for the overhanging part of the pipe during pipe processing. It is fixedly installed inside the end of the machine body 1 away from the chuck clamping mechanism 2. The movable part 4 is slidably installed on the Y-axis moving seat and connected to the Z-axis drive mechanism. The Z-axis drive mechanism is used to drive the movable part 4 to move up and down relative to the Y-axis moving seat along the Z-axis direction. The laser cutting head 5 is slidably connected inside the movable part 4. The movable part 4 is equipped with a linear guide rail, which consists of a guide rail and a slider. The slider of the linear guide rail is fixedly connected to the laser cutting head 5. The laser cutting head 5 consists of a QBH fiber optic interface, a collimating lens, a focusing lens, a focusing module, a ceramic ring, and a nozzle. The laser cutting head 5 is used for cutting the pipe. The detection assembly is mounted on the machine body 1 and includes multiple support members 61 fixedly installed on the outer surface of the machine body 1. The movable ends of the multiple support members 61 are all fixedly connected to a base plate 62. The support members 61 are electric push rods used to adjust the horizontal height of the base plate 62. Both ends of the base plate 62 are slidably connected to movable frames 63. The top of the base plate 62 is rotatably connected to two support rollers between the two movable frames 63 for supporting the pipe. Both ends of the base plate 62 are provided with linear guide rails, which consist of a guide rail and a slider. The slider of the linear guide rail is fixedly connected to the movable frame 63. Each movable frame 63 has multiple guide rollers 64 equidistantly slidably connected inside. Each guide roller 64 has a groove at its upper and lower ends corresponding to its corresponding groove. The detection assembly also includes multiple elastic elements 65, each a spring-loaded telescopic rod, equidistantly fixedly installed on the outer surface of each movable frame 63. Each elastic element 65 has a fixedly connected ring 66 at its movable end. Each elastic element 65 corresponds to a ring 66. The upper and lower ends of each guide roller 64 are rotatably connected to two corresponding rings 66. Each movable frame 63 also has multiple movable plates 67 equidistantly slidably connected inside. Each movable plate 67 has a straight groove at its upper and lower ends corresponding to its corresponding straight groove. Inside the groove, multiple elastic elements 68 are fixedly installed at equal intervals on the outer surface of each movable frame 63. The elastic elements 68 are spring telescopic rods. The upper and lower ends of each movable plate 67 are fixedly connected to two corresponding elastic elements 68. A pressure sensor 69 is fixedly installed inside each movable plate 67. Each pressure sensor 69 is electrically connected to the CNC equipment. The pressure sensor 69 is located on the side of the movable plate 67 facing the pipe, and its pressure-sensing end is corresponding to the pressure-receiving part on the movable plate 67. A swing arm 610 is rotatably connected to the top of the bottom plate 62. Both ends of the swing arm 610 are rotatably connected to connecting rods 611. The end of each connecting rod 611 away from the swing arm 610 is rotatably connected to the corresponding movable frame 63. An electric cylinder 612 is fixedly installed on the top of the bottom plate 62. The movable end of the electric cylinder 612 is fixedly connected to one of the movable frames 63.

[0020] In use, the pipe to be processed is first fed through the chuck clamping mechanism 2 using an external pipe feeding device. The four-jaw chuck of the chuck clamping mechanism 2 clamps and fixes the pipe. Then, the X-axis drive mechanism drives the chuck clamping mechanism 2 to move along the X-axis towards the auxiliary support mechanism 3. As the chuck clamping mechanism 2 moves, it causes the pipe to move synchronously. To prevent the pipe from bending and deforming during transportation or loading, which would affect the support stability of the auxiliary support mechanism 3 and the processing quality of the laser cutting head 5, a bending test needs to be performed on the pipe before it enters the auxiliary support mechanism 3. First, the horizontal height of the base plate 62 is adjusted according to the size of the pipe to be tested, and multiple support components 61 are activated to move the pipe. The moving end is raised synchronously, driving the base plate 62 to a suitable height, so that the two support rollers rotatably connected to the top of the base plate 62 can support the bottom of the pipe. Then, the electric cylinder 612 is activated. The moving end of the electric cylinder 612 pulls one of the moving frames 63 to slide along the linear guide rail on the base plate 62. When the moving frame 63 moves, it drives the other moving frame 63 to move synchronously towards the middle through the cooperation of the swing arm 610 and the two connecting rods 611, until the distance between the two moving frames 63 matches the width of the pipe. When the X-axis drive mechanism drives the pipe forward through the chuck clamping mechanism 2 and enters the space between the two moving frames 63, the outer wall of the pipe contacts and squeezes the guide rollers 64 on both sides in sequence. With the movable plate 67, if the pipe itself is a straight pipe, the outer walls on both sides of the pipe simultaneously apply pressure to the guide rollers 64 and the movable plate 67. Each guide roller 64 compresses the corresponding elastic element 65 through the rings 66 rotatably connected at its upper and lower ends, and at the same time pushes the corresponding movable plate 67 to compress the corresponding elastic element 68, so that both the guide rollers 64 and the movable plate 67 on both sides produce adaptive retraction. When the pipe to be tested is a round pipe, the chuck clamping mechanism 2 drives the round pipe to rotate by a preset angle and repeats the test at different circumferential positions. If the pressure value of the corresponding pressure sensor 69 at each test position is within the preset allowable range, it is determined that the pipe meets the straightness requirement and is allowed to continue forward. The pipe is fed into the auxiliary support mechanism 3. If the pipe itself is bent, the bent part will preferentially squeeze the guide roller 64 and movable plate 67 on one side during the forward movement of the pipe, causing the guide roller 64 and movable plate 67 on that side to retract under force. The guide roller 64 and movable plate 67 on the other side cannot contact it due to the deviation of the bent part. The pressure sensors 69 on both sides at the corresponding positions obtain two pressure values ​​respectively. When the difference between the two exceeds the preset threshold, or when a certain pressure value is lower than the preset contact threshold, it is determined that the part has deflected. The CNC equipment determines that the pipe has a bending defect. At this time, the X-axis drive mechanism drives the chuck clamping mechanism 2 to move the pipe back to its original position and enter the subsequent straightening process.

[0021] By setting up the above-mentioned detection components, bending detection can be performed on the pipe before it enters the auxiliary support mechanism 3. This timely identification of bending deformation of the pipe during transportation or loading prevents the bent pipe from affecting the support stability of the subsequent auxiliary support mechanism 3 and the processing quality of the laser cutting head 5. This effectively improves the yield of pipe cutting and processing and the reliability of equipment operation. Furthermore, it ensures that the detection components reduce the damage to the pipe surface caused by rigid collisions while performing bending detection, thereby improving the stability and reliability of the pipe detection process.

[0022] like Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the straightening assembly is mounted on the machine body 1, including two support members 71 fixedly installed on the outer surface of the machine body 1. The movable ends of the two support members 71 are fixedly connected to a bracket 72. The support members 71 are electric push rods used to adjust the horizontal height of the bracket 72. Multiple straightening rollers 73 are adjustablely installed inside the bracket 72, with each pair of straightening rollers 73 forming a group, for a total of four groups. Two groups are arranged horizontally, and the other two groups are arranged vertically. Each horizontally arranged straightening roller 73 has a lifting block mounted at both ends via bearings. The outer surface of each lifting block is slidably connected to the inside of the bracket 72, and the end of each lifting block is rotatably connected to a threaded rod. The outer surface of each threaded rod is threadedly connected to the inside of the bracket 72. The lever can adjust the position of the lifting block, thereby adjusting the position of the straightening roller 73. Each longitudinally arranged straightening roller 73 has a deflection arm mounted at both ends via bearings. The end of the deflection arm furthest from the straightening roller 73 is driven by a motor, which is fixedly mounted on the bracket 72. The motor output shaft is fixedly connected to the deflection arm. The distance between two adjacent straightening rollers 73 can be adjusted by adjusting the deflection angle of the deflection arm. The middle part of the straightening roller 73 is formed by two frustum-shaped rods fixedly connected together, with its outer diameter gradually decreasing from both ends to the middle to form a concave straightening area that matches the outer wall of the circular tube. The straightening assembly also includes two sleeves 74 slidably connected to the outer surface of each straightening roller 73. Multiple guide strips are fixedly connected to the outer surface of the straightening roller 73, and the inner surfaces of the sleeves 74 are slidably connected to... On multiple guide strips, the guide strips are used to prevent the sleeves 74 from rotating and to limit their movement. In the initial state, two sleeves 74 abut against each other, and the two sleeves 74 cooperate to cover the middle part of the correction roller 73 to meet the correction requirements of the square tube. Each sleeve 74 has multiple circumferentially equidistant slots 75 inside. Each correction roller 73 has an extrusion member 76 slidably connected inside both ends. The extrusion member 76 is composed of two frustum-shaped rods fixedly connected. The diameter of the extrusion member 76 gradually decreases from the middle to both ends. At the end of every two extrusion members 76 that are close to each other, multiple locking blocks 77 are circumferentially equidistantly slidably connected. The outer surface of each locking block 77 is slidably connected inside the corresponding correction roller 73. When the square tube needs to be corrected, the two sleeves 74 on the correction roller 73 move together. The sleeves 74 and 76 are mutually abutting. Multiple slots 75 on each sleeve 74 are aligned with corresponding locking blocks 77. Multiple locking blocks 78 are circumferentially equidistantly slidably connected to the ends of each pair of extrusion parts 76 that are far apart from each other. The outer surface of each locking block 78 is slidably connected to the interior of the corresponding correction roller 73. When the round tube needs correction, the two sleeves 74 on the correction roller 73 are moved apart until the middle portion of the correction roller 73 is exposed. Multiple slots 75 on each sleeve 74 are aligned with corresponding locking blocks 78. The ends of each locking block 77 and locking block 78 near the extrusion part 76 are set as arc surfaces conforming to the shape of the extrusion part 76. A bidirectional threaded rod 79 is threadedly connected to the interior of each pair of extrusion parts 76.The outer surface of the bidirectional threaded rod 79 is provided with two opposite threads. Two extrusion parts 76 are respectively threaded onto the two opposite threads of the same bidirectional threaded rod 79. Both ends of each bidirectional threaded rod 79 are rotatably connected to the interior of the corresponding correction roller 73. A drive element 710, which is a motor, is fixedly installed inside one end of each correction roller 73. A battery is fixedly installed inside the correction roller 73 on the side of the drive element 710. The battery is electrically connected to the drive element 710. The output end of each drive element 710 is fixedly connected to the corresponding bidirectional threaded rod 79. Each clamp... Both ends of block 77 and the opposite surfaces of the corresponding correction rollers 73 are fixedly fitted with springs 711. Initially, under the elastic force of the multiple springs 711, each block 77 and each block 78 remains in contact with the extruder 76. Multiple guide blocks 712 are circumferentially and equidistantly fixed to the outer surface of each extruder 76. The outer surface of each guide block 712 is slidably connected to the interior of the corresponding correction roller 73. The guide blocks 712 are used to circumferentially limit the extruder 76, preventing it from rotating during axial movement.

[0023] In initial use, all sets of straightening rollers 73 are in a clearance position, with their relative distance greater than the maximum external dimensions of the pipe to be processed, allowing the pipe to pass through without interference. When the detection component determines that the pipe has a bending defect, the pipe is returned to the straightening component area for straightening. First, the two support components 71 are activated to raise their movable ends synchronously, driving the bracket 72 to rise and fall to a suitable height, so that the multiple sets of straightening rollers 73 installed inside the bracket 72 are at the same horizontal height as the axis of the pipe. Then, the positions of the four sets of straightening rollers 73 are adjusted respectively: For the two sets of horizontally arranged straightening rollers 73, by rotating the threaded rods located at both ends of each straightening roller 73, the threaded rods can drive the lifting block to rise and fall along the inside of the bracket 72. The rising and falling of the lifting block drives the straightening rollers 73 to rise and fall synchronously, thereby adjusting the distance between the two straightening rollers 73 in each set, so that the distance between the two horizontally arranged straightening rollers 73 in each set is adapted to the height of the pipe; For the two sets of vertically arranged straightening rollers 73, by activating the motor at the end of the deflection arm to drive the deflection arm to deflect around the axis, the deflection angle is adjusted to change the distance between the two adjacent straightening rollers 73. The spacing between the correction rollers 73 is such that the distance between the two longitudinally arranged correction rollers 73 in each group is adapted to the width of the pipe. When the pipe to be corrected is a round pipe, it is necessary to switch to the round pipe straightening mode. Push the two sleeves 74 on the correction roller 73 by hand so that they move away from each other along the outer surface of the correction roller 73 until the concave part in the middle of the correction roller 73 (the diameter gradually decreases from the two ends to the middle) is completely exposed. At this time, the multiple slots 75 on each sleeve 74 are aligned with the corresponding second locking block 78. Then, start the drive unit. 710, the output end of the drive component 710 drives the bidirectional threaded rod 79 to reverse. When the bidirectional threaded rod 79 rotates, it drives the two extrusion components 76 to move axially in a direction away from each other. When the extrusion components 76 move, they will push multiple locking blocks 78 to overcome the elastic force of the spring 711 and move outward synchronously, so that the multiple locking blocks 78 respectively engage into the corresponding slots 75, thereby achieving position locking between the sleeve 74 and the correction roller 73. At this time, the middle recessed part of the correction roller 73 is in contact with the outer wall of the round tube to meet the correction requirements of the round tube.When switching to the square tube straightening mode, manually push the two sleeves 74 on the straightening roller 73 until they are close to each other along the outer surface of the straightening roller 73, until the two sleeves 74 abut against each other and completely cover the middle recessed part of the straightening roller 73. At this time, the multiple slots 75 on each sleeve 74 are aligned with the corresponding locking blocks 77. Then, start the drive unit 710. The output end of the drive unit 710 drives the bidirectional threaded rod 79 to rotate forward. When the bidirectional threaded rod 79 rotates, it drives the two extrusion members 76 to move axially towards each other. When the extrusion members 76 move, they push the multiple locking blocks 77 to overcome the elastic force of the spring 711 and move outward synchronously, so that the multiple locking blocks 77 respectively engage with the corresponding slots 75, realizing the position locking between the sleeves 74 and the straightening roller 73. At this time, the outer diameter of the sleeve 74 is equal to the maximum outer diameter of the non-recessed part at both ends of the straightening roller 73. After the 74 rollers abut against each other, their outer circumferential surfaces together form an axially continuous cylindrical correction working surface of equal diameter, used to meet the correction requirements of the square tube. After the position and working mode of the correction rollers 73 are adjusted, the X-axis drive mechanism drives the tube to move back and forth along the X-axis direction between the four sets of correction rollers 73 through the chuck clamping mechanism 2, so that the tube is subjected to uniform correction force in both the transverse and longitudinal directions, thereby realizing the all-round correction of the tube. After straightening, the chuck clamping mechanism 2 drives the tube forward again through the detection component. If the pressure detection values ​​of each group are within the preset allowable range, the straightening is deemed qualified and the tube enters the auxiliary support mechanism 3. If the detection values ​​still exceed the preset allowable range, the tube returns to the straightening component and the correction amount of the corresponding correction roller 73 is adjusted according to the detected bending direction and deviation amount, and straightening is performed again until the pressure detection value obtained by the detection component reaches the preset allowable range.

[0024] By setting up the above-mentioned straightening components, the straightening requirements of round or square tubes can be met simultaneously. The working mode of the straightening roller 73 can be quickly switched without replacing the entire set of straightening components for different tubes. This effectively improves the applicability and reliability of tube straightening. Furthermore, the sleeve 74 is mechanically locked by the locking block 1 77 or the locking block 2 78 to prevent the sleeve 74 from moving during the straightening process, thereby effectively improving the working stability of the straightening process.

[0025] like Figure 1 , Figure 10 , Figure 11 , Figure 12 and Figure 13As shown, the protective assembly is mounted on the movable part 4, including ear plates 81 fixedly installed at both ends of the laser cutting head 5. The outer surface of the ear plates 81 is slidably connected to the inside of the movable part 4. An L-shaped tube 82 is fixedly connected to the top of each ear plate 81. The L-shaped tubes 82 are inverted, and the end of each L-shaped tube 82 away from the ear plate 81 is fixedly connected to the outer surface of the laser cutting head 5. The outer surface of each L-shaped tube 82 is slidably connected to the inside of the movable part 4. The protective assembly also includes ear plates 81 fixedly installed at their top ends and the movable part 4. Multiple springs 83 are respectively sleeved on the outer surface of adjacent L-shaped tubes 82. A connecting frame 84 is fixedly connected above each L-shaped tube 82 inside the movable part 4. Each connecting frame 84 corresponds to one L-shaped tube 82 and is located above its corresponding L-shaped tube 82. A lifting groove is formed inside the connecting frame 84, and the corner portion at the top of the L-shaped tube 82 is slidably connected inside the lifting groove. A locking element 85 is rotatably connected inside each connecting frame 84. 5 is an L-shaped hook. The locking element 85 has a beveled end near the L-shaped tube 82. The locking element 85 has a slot that matches the L-shaped tube 82. When the L-shaped tube 82 passes the locking element 85 upwards, the corner of the L-shaped tube 82 can overlap in the slot to prevent the L-shaped tube 82 from resetting downwards. A magnetic baffle 86 is fixedly connected to one end of each locking element 85. The connecting frame 84 is made of iron. The outer surface of each magnetic baffle 86 is magnetically attached to the corresponding connecting frame 84. The magnetic baffle 86 has a large width. For the width of the locking member 85, each connecting frame 84 has a slidably connected pressing rod 87 inside. Each pressing rod 87 has a fixedly connected rotating member 88 at the end away from the locking member 85. In the initial state, there is a clearance gap between the end of the pressing rod 87 near the locking member 85 and the locking member 85 to allow the locking member 85 to deflect freely after being pressed by the L-shaped tube 82. The outer surface of the end of each pressing rod 87 near the rotating member 88 is threaded to the inside of the movable member 4. The part of the pressing rod 87 corresponding to the movable member 4 is provided with threads.

[0026] In use, after the pipe passes through the bending detection component and the straightening component, the X-axis drive mechanism drives the chuck clamping mechanism 2 to move the pipe forward into the auxiliary support mechanism 3. The support rollers of the auxiliary support mechanism 3 provide auxiliary support for the overhanging part of the pipe. Then, the pipe can be laser-cut. The Y-axis drive mechanism drives the Y-axis moving seat to move along the Y-axis direction, and the Z-axis drive mechanism drives the movable part 4 to rise and fall relative to the Y-axis moving seat along the Z-axis direction, thereby moving the laser cutting head 5 to the target cutting position. During the cutting process of the laser cutting head 5... When the pipe warps unexpectedly or a programming error causes a rigid collision between the laser cutting head 5 and the pipe, the laser cutting head 5 will be subjected to an upward compressive force. This compressive force is transmitted to the ear plates 81 fixedly connected to both ends of the laser cutting head 5. When the ear plates 81 move upward, they compress the multiple springs 83 fixedly installed between their tops and the opposite surfaces of the movable parts 4, achieving initial buffering and absorption of the impact energy. At the same time, when the laser cutting head 5 and the ear plates 81 move upward, they drive the L-shaped tube 82 to move upward synchronously. The corner portion at the top of the L-shaped tube 82 slides upward along the lifting groove opened inside the connecting frame 84. When the L-shaped tube 8... When the corner portion of L-shaped tube 82 rises to contact the inclined surface of locking member 85, L-shaped tube 82 applies a pushing force to the inclined surface of locking member 85, causing locking member 85 to overcome the magnetic attraction between magnetic baffle 86 and connecting frame 84 and deflect around the axis. The corner portion of L-shaped tube 82 continues to move upward and completely enters the lifting groove. When L-shaped tube 82 rises to the point where its corner portion is higher than the groove opening of locking member 85, locking member 85 resets under the combined action of its own gravity and the magnetic attraction between magnetic baffle 86 and connecting frame 84. Magnetic baffle 86 re-attaches to connecting frame 84, maintaining the position of locking member 85. When the position is stable, the corner portion at the top of the L-shaped tube 82 tends to move downwards under the restoring force of the second spring 83, but is blocked by the slot of the locking member 85 and cannot fall. The position of the L-shaped tube 82 is reliably locked by the locking member 85, thus keeping the laser cutting head 5 in the raised state, providing time for the operator to check for abnormalities, and realizing the trigger-type collision protection and automatic locking mechanism of the laser cutting head 5. When the abnormality is eliminated and the laser cutting head 5 needs to be returned to the normal working position, the operator first holds the laser cutting head 5 and releases the locking members 85 on both sides in sequence. Specifically, the operator rotates the corresponding rotating member 88, causing the rotating member 88 to drive the pressing rod 87 to rotate. The pressing rod 87 moves along its own axis under the action of the threaded engagement and pushes the locking member 85 to overcome the magnetic attraction of the magnetic baffle 86 and deflect, so that the slot of the locking member 85 disengages from the corner portion at the top of the L-shaped tube 82. After both locking members 85 are released, the laser cutting head 5 is slowly released to return it to the normal working position.

[0027] By setting the above-mentioned protective components, it can be ensured that the laser cutting head 5 actively avoids collisions, effectively preventing problems such as ceramic ring breakage, nozzle failure, or focusing lens displacement caused by continuous force on the laser cutting head 5. Furthermore, the laser cutting head 5 automatically locks after reaching the protection position, preventing it from immediately resetting under the restoring force of spring 83 and causing secondary collisions. This effectively reduces equipment maintenance costs caused by accidental collisions, thereby improving the safety and reliability of the laser tube cutting machine.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A laser tube cutting machine, comprising a machine body (1) and a chuck clamping mechanism (2) slidably connected to the outer surface of the machine body (1), characterized in that, Also includes: The auxiliary support mechanism (3) is fixedly installed inside the end of the machine body (1) away from the chuck clamping mechanism (2); The movable part (4) is located at the top of the end of the machine body (1) away from the chuck clamping mechanism (2); The laser cutting head (5) is slidably connected inside the movable part (4); The detection component is set on the body (1) and includes multiple support members (61) fixedly installed on the outer surface of the body (1). The movable ends of the multiple support members (61) are fixedly connected to the base plate (62). The two ends of the base plate (62) are slidably connected to the movable frame (63). Multiple guide rollers (64) are equidistantly connected inside each movable frame (63). The straightening assembly is set on the machine body (1) and includes two support members (71) fixedly installed on the outer surface of the machine body (1). The movable ends of the two support members (71) are fixedly connected to a bracket (72). Multiple straightening rollers (73) are installed in the internal position of the bracket (72). The protective components are mounted on the movable part (4) and include ear plates (81) fixedly installed at both ends of the laser cutting head (5). Each ear plate (81) has an L-shaped tube (82) fixedly connected to its top end. The end of each L-shaped tube (82) away from the ear plate (81) is fixedly connected to the outer surface of the laser cutting head (5). The outer surface of each L-shaped tube (82) is slidably connected to the inside of the movable part (4).

2. The laser tube cutting machine according to claim 1, characterized in that: The detection assembly also includes multiple elastic elements (65) that are fixedly installed at equal intervals on the outer surface of each movable frame (63). Each elastic element (65) has a ring (66) fixedly connected to its movable end. The upper and lower ends of each guide roller (64) are rotatably connected to the two corresponding rings (66). Multiple movable plates (67) are slidably connected at equal intervals inside each movable frame (63). Multiple elastic elements (68) are fixedly installed at equal intervals on the outer surface of each movable frame (63). The upper and lower ends of each movable plate (67) are fixedly connected to the two corresponding elastic elements (68). A pressure sensor (69) is fixedly installed inside each movable plate (67).

3. The laser tube cutting machine according to claim 1, characterized in that: A swing arm (610) is rotatably connected to the top of the base plate (62). Both ends of the swing arm (610) are rotatably connected to connecting rods (611). The end of each connecting rod (611) away from the swing arm (610) is rotatably connected to the corresponding moving frame (63). An electric cylinder (612) is fixedly installed on the top of the base plate (62). The movable end of the electric cylinder (612) is fixedly connected to one of the moving frames (63).

4. A laser tube cutting machine according to claim 1, characterized in that: The straightening assembly also includes two sleeves (74) that are slidably connected to the outer surface of each straightening roller (73). Each sleeve (74) has multiple slots (75) equidistantly spaced in the circumferential direction. Each straightening roller (73) has an extrusion member (76) slidably connected to both ends. Each pair of extrusion members (76) has multiple locking blocks (77) slidably connected to the end that is close to each other. The outer surface of each locking block (77) is slidably connected to the interior of the corresponding straightening roller (73). Each pair of extrusion members (76) has multiple locking blocks (78) slidably connected to the end that is far from each other. The outer surface of each locking block (78) is slidably connected to the interior of the corresponding straightening roller (73).

5. A laser tube cutting machine according to claim 4, characterized in that: The interior of each pair of extrusion pieces (76) is connected by a threaded double-threaded rod (79). Both ends of each double-threaded rod (79) are rotatably connected to the interior of the corresponding correction roller (73). A drive unit (710) is fixedly installed inside one end of each correction roller (73). The output end of each drive unit (710) is fixedly connected to the corresponding double-threaded rod (79).

6. A laser tube cutting machine according to claim 4, characterized in that: Spring 1 (711) is fixedly installed on the two ends of each card block 1 (77) and card block 2 (78) opposite to the corresponding correction roller (73). Multiple guide blocks (712) are fixedly connected circumferentially at equal intervals on the outer surface of each extrusion piece (76). The outer surface of each guide block (712) is slidably connected inside the corresponding correction roller (73).

7. A laser tube cutting machine according to claim 1, characterized in that: The protective assembly also includes multiple springs (83) fixedly installed on the top of each ear plate (81) opposite to the movable part (4). Inside the movable part (4), above each L-shaped tube (82), a connecting frame (84) is fixedly connected. Inside each connecting frame (84), a locking part (85) is rotatably connected. One end of each locking part (85) is fixedly connected to a magnetic baffle (86). The outer surface of each magnetic baffle (86) is attached to the corresponding connecting frame (84).

8. A laser tube cutting machine according to claim 7, characterized in that: Each connecting frame (84) has a sliding connection of a pressing rod (87) inside. Each pressing rod (87) has a fixed connection of a rotating part (88) at the end away from the locking part (85). The outer surface of the end of each pressing rod (87) near the rotating part (88) is threaded into the interior of the movable part (4).

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