Profile machining method and four-chuck full-free laser pipe cutting machine

Abstract

The invention discloses a profile machining method and a four-chuck full-free laser pipe cutting machine, and belongs to the field of laser cutting. According to the sectional material machining method, a movable first chuck, a movable second chuck, a movable third chuck and a movable fourth chuck are included, the combined load bearing of the first chuck and the second chuck is G1, the combined load bearing of the first chuck, the second chuck and the third chuck is G2, the weight of a to-be-machined pipe is G, and when G is larger than or equal to G1 and smaller than or equal to G2, G is larger than or equal to G2. The first chuck, the second chuck and the third chuck are used for clamping and supporting a feeding side pipe at the same time; and according to the length of the actual finished pipe, the chuck is selected to clamp and support the pipe on the discharging side. By means of the structure, adaptive supporting strength can be provided for pipes with different weights, the problem that due to the fact that the pipes are too heavy, the load bearing capacity of the chucks is insufficient is solved, the supporting stability during heavy pipe machining is improved, and for long pipes, the drooping and bending phenomena in the feeding process are reduced by increasing the number of the chucks on the feeding side, dispersing the pipe gravity and reducing the drooping and bending phenomena in the feeding process, and the machining precision is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, in particular to a profile processing method and a four-chuck fully free laser tube cutting machine. Background Art

[0002] Laser tube cutting machine is a professional equipment that uses high-energy laser beams to cut various types of tubes (such as metal tubes, plastic tubes, composite tubes, etc.). With its high precision, high efficiency and high flexibility, it is widely used in a variety of fields such as aerospace, automobile manufacturing, medical equipment, furniture decoration, etc.

[0003] Laser tube cutting machines are mainly two-chuck and three-chuck models, but when processing heavier or longer tubes, the load-bearing capacity or accuracy is difficult to guarantee. In addition, three-chuck laser cutting machines are difficult to load, cut and unload at the same time, and the chuck frequently crosses the gantry, resulting in low efficiency. Currently, four-chuck models have appeared to meet the processing needs of long or heavy tubes.

[0004] Existing four-chuck machines usually adopt a "2+2" chuck working mode during use, that is, two chucks are set on the left and right sides of the laser cutting head (loading side and unloading side). The two chucks on the left are used for loading work, and the two chucks on the right are used for unloading work of cutting finished parts. The overall adaptability is limited. For example, when the pipe is thin and long, it is very easy to sag and bend during loading, affecting the processing accuracy. It is also not suitable for heavy pipes. The load-bearing capacity is limited, which affects the support stability of the pipe during cutting, and thus affects the cutting accuracy. Summary of the Invention

[0005] In order to solve the technical problem that the existing four-chuck model in the above background technology usually adopts a "2+2" chuck working mode during use, has limited overall adaptability and affects cutting accuracy, the present invention provides a profile processing method.

[0006] The technical solutions of the present invention are as follows: The present invention provides a profile processing method, comprising a movable first chuck, a second chuck, a third chuck and a fourth chuck, the combined load-bearing capacity of the first chuck and the second chuck is G1, the combined load-bearing capacity of the first chuck, the second chuck and the third chuck is G2, the weight of a pipe to be processed is G, and the number of chucks involved in the loading and cutting process on the loading side of a laser head is A; when G1≤G≤G2, then A=3, the first chuck, the second chuck and the third chuck simultaneously clamp and support the pipe on the loading side; the pipe on the unloading side is clamped and supported by no chuck, the fourth chuck, or the third and fourth chucks according to the actual length of the finished pipe. It can provide suitable support strength for pipes of different weights, avoid the problem of insufficient chuck load-bearing capacity due to excessively heavy pipes, and improve the support stability during heavy pipe processing. For longer pipes, by increasing the number of chucks on the feeding side, the gravity of the pipes is dispersed, the sagging and bending phenomenon during the feeding process is reduced, and the processing accuracy is guaranteed. The chucks on the unloading side are flexibly adjusted according to the length of the finished product, which not only avoids the redundant use of chucks, but also prevents the finished pipes from deforming during cutting and moving through targeted support, further improving the cutting accuracy and equipment adaptability.

[0007] Preferably, the machine also includes several blanking flaps spaced along the length of the bed. The actual finished pipe length is L0, and the designed length of the finished pipe is L1-L9. When A=3, and L1≤L0≤L4, the first, second, and third chucks clamp the pipe to be processed on the loading side. The first chuck drives the pipe toward the laser head for processing. The first blanking flap supports the pipe before it is cut, and then cuts the pipe. The cut finished pipe is then unloaded under the drive of the first blanking flap. Short-length finished pipes have low weight and deflection, and can remain stable without the need for additional chuck support, reducing efficiency losses caused by frequent chuck movement. The timely support of the blanking flap avoids shaking at the moment of pipe cutting and ensures the flatness of the cut surface. The flap-driven unloading method simplifies the unloading process of short finished products and improves the continuity and efficiency of short pipe processing.

[0008] Preferably, when A = 3 and L4≤L0≤L6, the first chuck, the second chuck and the third chuck clamp the pipe to be processed on the feeding side, the first chuck drives the pipe to move towards the laser head and process, during the cutting process, the fourth chuck clamps and supports the pipe on the discharging side, at the same time, the first discharging flap supports the bottom of the pipe on the discharging side, after cutting the pipe, the fourth chuck drives the finished pipe away from the laser head, during the movement, the second discharging flap supports the finished pipe, the clamping jaw of the fourth chuck is released and removed, and the finished pipe is discharged under the driving of the two discharging flaps. The fourth chuck and the discharging flap form a double fixation of “clamping + bottom support”, effectively inhibiting the vibration and sagging of the medium-length pipe during cutting, ensuring the cutting precision, and avoiding the deformation of the pipe due to suspension when the finished product moves through the relay support of the second discharging flap. At the same time, the driving and moving mode of the fourth chuck ensures the stability of the finished product conveying. The cooperation of the chuck and the flap balances the support strength and the equipment running efficiency, and is suitable for batch processing of medium-length pipes.

[0009] Preferably, when A = 3 and L6≤L0, the first chuck, the second chuck and the third chuck clamp the pipe to be processed on the feeding side, the first chuck drives the pipe to move towards the laser head and process, the third chuck moves from the feeding side to the discharging side for cutting, during the cutting process, the fourth chuck clamps and supports the pipe on the discharging side, after cutting, the third chuck and the fourth chuck clamp the finished pipe and move, a plurality of discharging flaps support and discharge the finished pipe, and the third chuck and the fourth chuck are released and removed. The double chuck (third and fourth chucks) clamps the long finished pipe, cooperates with the multi-flap bottom support, greatly improves the bending resistance of the long pipe, the cross-side movement of the third chuck breaks the limitation of “fixed on the feeding side and fixed on the discharging side”, realizes the dynamic reuse of the chuck function, enhances the processing capacity of the equipment for the super-long pipe, and ensures the size accuracy of the finished product after cutting.

[0010] Preferably, when G≤G1, A = 2, the first chuck and the second chuck clamp and support the pipe on the feeding side at the same time; the pipe on the discharging side is clamped and supported by the third chuck / the third chuck / the third chuck and the fourth chuck according to the actual length of the finished pipe. The deflection of light pipe is small, and two chucks can meet the support demand, avoiding the waste of resources caused by excessive use of chucks, reducing the number of chucks involved on the feeding side, reducing the energy consumption and time cost of chuck movement, and improving the processing efficiency of light pipe. The flexible cooperation with the chuck on the discharging side maintains the stability of the light pipe during cutting and discharging, and balances the efficiency and precision.

[0011] Preferably, when processing the final section of pipe, a zero-cut mode is used. During the cutting process, the pipe is gripped by the first and second chucks, switching to the third and fourth chucks. This fully utilizes the remaining material at the end of the pipe, achieving zero-cut cutting, reducing raw material waste and lowering production costs. The chuck switching avoids the problem of unstable gripping caused by a short remaining length of pipe, ensuring the accuracy and safety of the end cut and improving the equipment's compatibility with full-length pipe processing.

[0012] A four-chuck, fully mobile laser tube cutting machine comprises a bed with a gantry mechanism fixed in the middle of the bed, on which are mounted cutting and tapping components. A four-chuck mechanism is movably mounted on the bed. A loading roller mechanism and an automatic loading mechanism are mounted on the loading side of the gantry mechanism, while a unloading flap mechanism is mounted on the unloading side. The coordinated arrangement of the bed, gantry, four-chuck mechanism, loading rollers, automatic loading, and unloading flap enables fully mobile chuck movement, breaking the limitations of the traditional four-chuck "2+2" model and improving the processing adaptability of long and heavy pipes.

[0013] Preferably, the loading roller mechanism includes a support base, on which are mounted a roller lifting assembly and a centering assembly. The roller lifting assembly includes rollers that can be raised and lowered, and the rollers are arranged horizontally and perpendicular to the bed mechanism. The centering assembly is located on one side of the roller lifting assembly and includes two oppositely arranged first and second centering rollers, which can be raised and lowered and moved closer or further away from each other. The roller lifting assembly can adjust the support height by raising and lowering the rollers to accommodate pipes of different diameters. The first and second centering rollers of the centering assembly can be raised and lowered and moved closer or further away to achieve automatic centering and positioning of the pipes, reducing manual adjustment time, improving loading accuracy, and avoiding offset and collision during pipe loading.

[0014] Preferably, the automatic feeding mechanism includes a pipe alignment assembly, which includes a frame fixed to the ground, a second motor mounted on the frame, and a alignment plate connected to the second motor via a ball screw. The alignment plate is located adjacent to the gantry mechanism and is capable of reciprocating along the length of the bed mechanism. The alignment assembly, driven by the second motor and the ball screw, precisely aligns the pipe ends and ensures consistent cutting lengths.

[0015] Preferably, the unloading flap mechanism includes a tilting assembly capable of lifting and lowering, which includes an unloading flap that can pivot about an axis. A V-shaped groove is provided in the middle of the unloading flap, and rollers are provided on its upper surface for rotation. The V-shaped groove accommodates pipes of varying diameters, preventing them from rolling or deflecting during unloading. The rollers reduce friction between the pipe and the flap, lowering the risk of scratching the pipe surface. This facilitates smooth movement and unloading of finished pipes, improving unloading stability and finished product quality.

[0016] It can be seen from the above technical solutions that the advantages of the present invention are: By dynamically adjusting the number of chucks involved in clamping support on the loading side according to the relationship between the weight of the pipe to be processed and the joint load-bearing capacity of different chuck combinations, and flexibly selecting the use of the chucks on the unloading side, it is possible to provide suitable support strength for pipes of different weights, avoid the problem of insufficient chuck load-bearing capacity due to excessively heavy pipes, and improve the support stability during heavy pipe processing. For longer pipes, by increasing the number of chucks on the loading side, the gravity of the pipe is dispersed, the sagging and bending phenomenon during the loading process is reduced, and the processing accuracy is guaranteed. The chucks on the unloading side are flexibly allocated according to the length of the finished product, which not only avoids the redundant use of chucks, but also prevents the finished pipe from deformation during cutting and moving through targeted support, further improving the cutting accuracy and equipment adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic flow chart of a profile processing method according to one or more embodiments of the present invention; Figure 2 Schematic diagram of chuck position change in "2+0" mode according to one or more embodiments of the present invention; Figure 3 Schematic diagram of the chuck position change in the "2+1" and "2+2" combination modes according to one or more embodiments of the present invention Figure 1 ; Figure 4 Schematic diagram of the chuck position change in the "2+1" and "2+2" combination modes according to one or more embodiments of the present invention Figure 2 ; Figure 5 Schematic diagram of the chuck position change in the "2+1" and "2+2" combination modes according to one or more embodiments of the present invention Figure 3 ; Figure 6 Schematic diagram of the chuck position change in the "2+1" and "2+2" combination modes according to one or more embodiments of the present invention Figure 4 ; Figure 7 Schematic diagram of the chuck position change in the "2+1" and "2+2" combination modes according to one or more embodiments of the present invention Figure 5 ; Figure 8 Schematic diagram of the chuck position change in the "0+2" mode according to one or more embodiments of the present invention Figure 1 ; Figure 9 Schematic diagram of the chuck position change in the "0+2" mode according to one or more embodiments of the present invention Figure 2 ; Figure 10 Schematic diagram of chuck position change in "3+0" mode according to one or more embodiments of the present invention; Figure 11 Schematic diagram of chuck position change in "3+1" mode according to one or more embodiments of the present invention; Figure 12 Schematic diagram of chuck position changes in "3+1" and "2+2" combination modes according to one or more embodiments of the present invention; Figure 13 Schematic diagram of the overall structure of a four-chuck fully free laser tube cutting machine according to one or more embodiments of the present invention; Figure 14 A partially enlarged structural schematic diagram of a four-chuck fully free laser tube cutting machine according to one or more embodiments of the present invention; Figure 15 A schematic structural diagram of a bed according to one or more embodiments of the present invention; Figure 16 Schematic diagram of the structure of a gantry mechanism according to one or more embodiments of the present invention; Figure 17 Schematic diagram of the structure of a loading roller mechanism according to one or more embodiments of the present invention; Figure 18 Schematic diagram of the structure of an automatic loading mechanism according to one or more embodiments of the present invention; Figure 19 Schematic diagram of the structure of a blanking and turning mechanism according to one or more embodiments of the present invention; The components represented by the reference numerals in the figure are: 1. Bed structure; 11. Bed; 12. Trolley; 111. Beam base; 112. Upper auxiliary beam; 113. Upper main beam; 114. Vertical beam; 115. Intermediate beam; 116. Main beam; 117. Reinforced beam; 118. Bottom beam; 119. Reinforcement rib; 120. Upper plate; 121. Lower plate; 122. Loading roller connection seat; 123. Unloading roller connection seat; 124. First ramp plate; 125. Second Ramp plate; 126, side plate; 2, gantry mechanism; 21, crossbeam; 22, cutting assembly; 221, base; 222, Z-axis connecting plate; 223, laser head connecting plate; 23, tapping assembly; 231, tapping spindle; 232, knife cylinder; 24, tool magazine; 3, loading roller mechanism; 31, support base; 311, mounting seat; 312, first motor; 313, first reducer; 32, roller lifting assembly; 321, first Slide plate; 322, roller; 33, centering assembly; 331, lifting cylinder; 332, centering plate; 333, centering cylinder; 334, first connecting plate; 335, first centering roller; 336, sprocket; 337, chain; 338, second connecting plate; 339, second centering roller; 4, automatic feeding mechanism; 41, pipe power assembly; 42, pipe end positioning assembly; 421, frame; 422, end plate; 423, first Second motor; 424, ball screw; 425, linear rail; 5, blanking flap mechanism; 51, lifting assembly; 511, support seat; 512, third motor; 513, second reducer; 514, second slide; 52, flip assembly; 521, connecting rod; 522, cylinder; 523, blanking flap; 524, roller; 6, four-chuck mechanism; 61, first chuck; 62, second chuck; 63, third chuck; 64, fourth chuck. DETAILED DESCRIPTION

[0019] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0020] Example 1 In a typical embodiment of the present invention, Figures 1-12As shown in the figure, a profile processing method is proposed, which includes six modes, represented by "A+B", namely "2+0", "2+1", "2+2", "3+0", "3+1", and "0+2". Among them, "0+2" is the zero-tail processing mode at the end of cutting, and the other five modes are normal cutting. A represents the number of chucks that need to be involved on the left side of the laser head (loading side) during the loading and cutting process, and B represents the number of chucks that need to be involved on the right side of the cutting head (unloading side) during the unloading and cutting process. In addition, the weight of the pipe to be processed is defined as G≤1200kg, the length of the pipe to be processed is defined as L≤12000m, the actual length of the finished pipe is L0, and the design length of the finished pipe is specified as L1, L2, L3, L4, L5, L6, etc.

[0021] The combined load-bearing capacity of the first chuck 61 and the second chuck 62 is G1, and the combined load-bearing capacity of the first chuck 61, the second chuck 62 and the third chuck 63 is G2. The first blanking flap 523 calculated from the position closest to the laser head is T1, and so on T2, T3, T4, T5, etc. In this example, G1 is 800 kg and G2 is 1200 kg. There are five blanking flaps 523, among which T1 is 1400 mm long, T2 is 800 mm long, and T3 is 1 The length of T4 is 800mm, the length of T4 is 500mm, the length of T5 is 500mm, the distance between T1 and T2 is 1000mm, the distance between T2 and T3 is 600mm, the distance between T3 and T4 is 2150mm, and the distance between T4 and T5 is 2500mm; L1 is 1200mm, L2 is 2000mm, L3 is 2400mm, L4 is 2500mm, L5 is 3800mm, L6 is 4000mm, L7 is 6500mm, L8 is 9200mm, and L9 is 12500mm.

[0022] First, determine the number of chucks A on the loading side based on the weight G of the pipe to be processed. The judgment conditions are: If G≤G1, then A=2, that is, two chucks are used on the loading side, which can be "2+0", "2+1", "2+2" and other modes; If G1≤G≤G2, then A=3, that is, 3 chucks are used on the loading side, which can be "3+0" and "3+1" modes.

[0023] Specifically, when A=2 and L0≤L2, that is, when the actual length of the finished pipe is less than 2000mm, the "2+0" mode is adopted.

[0024] like Figure 2As shown, the processing process is as follows: the material is loaded onto the roller, and then the first chuck 61 and the second chuck 62 clamp the pipe to be processed. Driven by the first chuck 61, the pipe moves toward the laser head for laser cutting and tapping. Before the pipe is cut off, the first blanking flap 523 (i.e., T1) rises to the bottom surface of the pipe to support the pipe to be cut off, and then the pipe is cut off. The finished pipe begins to descend and flip under the drive of the first blanking flap 523, completing the processing of the pipe.

[0025] When A=2 and L2≤L0≤L3, that is, the actual length of the finished pipe is greater than 2000mm and less than 2400mm, the "2+1" and "2+2" combination modes are adopted.

[0026] Specific as Figure 3 As shown, the processing process is as follows: the material is loaded onto the roller, and then the first chuck 61 and the second chuck 62 clamp the pipe to be processed. Driven by the first chuck 61, the pipe moves to the right (i.e., toward the laser head) for laser cutting and tapping. During the processing, when the pipe extends 2000 mm to the right side of the laser head (i.e., the blanking side), the third chuck 63 begins to participate in the clamping of the pipe on the blanking side to improve the processing accuracy. Before cutting, the fourth chuck 64 participates in the clamping of the finished pipe. That is, at this time, there are two chucks on the loading side and two chucks on the blanking side. Then the pipe is cut. The third chuck 63 and the fourth chuck 64 clamp the finished pipe. Driven by the fourth chuck 64, the center of the length of the finished pipe is aligned with the center of the second blanking flap 523 (i.e., T2). Then the second blanking flap 523 is raised to overlap with the bottom surface of the finished pipe to support the finished pipe. At this time, the third chuck 63 is released and moved to the left (towards the laser head), and the fourth chuck 64 is released and moved to the right (away from the laser head). Driven by the second blanking flap 523, the finished pipe begins to descend and flip, completing the processing.

[0027] When A=2 and L3≤L0≤L5, that is, the actual length of the finished pipe is greater than 2400mm and less than 3800mm, the "2+1" and "2+2" combination modes are adopted.

[0028] Specific as Figure 4As shown, the processing process is as follows: the material is loaded onto the roller, and then the first chuck 61 and the second chuck 62 clamp the pipe to be processed. Driven by the first chuck 61, the pipe moves to the right (closer to the laser head) for laser cutting and tapping. During the processing, when the pipe extends 2000mm to the right of the laser head, the third chuck 63 participates in the clamping of the pipe on the blanking side to improve the processing accuracy; when the pipe extends 3000mm to the right of the laser head, the third chuck 63 and the fourth chuck 64 simultaneously participate in the clamping of the pipe on the blanking side. After the tube is cut off, the third chuck 63 and the fourth chuck 64 clamp the finished tube. Driven by the fourth chuck 64, the center of the length of the finished tube is aligned with the center of the third blanking flap 523. Then the third blanking flap 523 is raised to coincide with the bottom surface of the finished tube. At this time, the third chuck 63 is released and moves to the left (towards the laser head), and the fourth chuck 64 is released and moves to the right (away from the laser head). Driven by the third blanking flap 523, the tube begins to descend and flip, and the processing is completed.

[0029] When A=2 and L5≤L0≤L7, that is, the actual length of the finished pipe is greater than 3800mm and less than 6500mm, the "2+1" and "2+2" combination modes are adopted.

[0030] Specific as Figure 5 As shown, the processing process is as follows: the material is loaded onto the roller, and then the first chuck 61 and the second chuck 62 clamp the pipe to be processed. Driven by the first chuck 61, the pipe moves to the right (close to the direction of the laser head) for laser cutting and tapping. As the length of the pipe extending out of the laser head increases, the third chuck 63 and the fourth chuck 64 successively participate in the clamping of the pipe. Specifically, during the processing, when the pipe extends 2000mm to the right of the laser head, the third chuck 63 participates in the clamping of the pipe on the blanking side to improve the processing accuracy; when the pipe extends 3000mm to the right of the laser head, the third chuck 63 and the fourth chuck 64 simultaneously participate in the clamping of the pipe on the blanking side. Clamping to improve cutting accuracy, after the pipe is cut off, the third chuck 63 and the fourth chuck 64 clamp the finished pipe, and under the drive of the fourth chuck 64, the center of the length of the finished pipe is coincided with the center of the second blanking flap 523 and the third blanking flap 523, and then the second blanking flap 523 and the third blanking flap 523 are synchronously raised to coincide with the bottom surface of the finished pipe. At this time, the third chuck 63 is released and moved to the left (towards the direction close to the laser head), and the fourth chuck 64 is released and moved to the right (away from the laser head). The finished pipe begins to descend and flip under the drive of the second blanking flap 523 and the third blanking flap 523, and the processing is completed.

[0031] When A=2 and L7≤L0≤L8, that is, the actual length of the finished pipe is greater than 6500mm and less than 9200mm, the "2+1" and "2+2" combination modes are adopted.

[0032] Specific as Figure 6 As shown, the processing process is as follows: the material is loaded onto the roller, and then the first chuck 61 and the second chuck 62 clamp the pipe to be processed. Driven by the first chuck 61, the pipe moves to the right (close to the direction of the laser head) for laser cutting and tapping. As the length of the pipe extending from the laser head increases, the third chuck 63 and the fourth chuck 64 successively participate in the clamping of the pipe. Specifically, during the processing, when the pipe extends 2000mm to the right of the laser head, the third chuck 63 participates in the clamping of the pipe on the blanking side to improve the processing accuracy; when the pipe extends 3000mm to the right of the laser head, the third chuck 63 and the fourth chuck 64 simultaneously participate in the clamping of the pipe on the blanking side to improve the cutting accuracy. After the pipe is cut, The third chuck 63 and the fourth chuck 64 clamp the finished pipe, and under the drive of the fourth chuck 64, the center of the length of the finished pipe is aligned with the center of the second blanking flap 523, the third blanking flap 523, and the fourth blanking flap 523. Then the second blanking flap 523, the third blanking flap 523, and the fourth blanking flap 523 are synchronously raised to coincide with the bottom surface of the finished pipe. At this time, the third chuck 63 is released and moves to the left (towards the laser head), and the fourth chuck 64 is released and moves to the right (away from the laser head). Driven by the second blanking flap 523, the third blanking flap 523, and the fourth blanking flap 523, the finished pipe begins to descend and flip, and the processing is completed.

[0033] When A=2 and L8≤L0≤L9, that is, the actual length of the finished pipe is greater than 9200mm and less than 12500mm, the "2+1" and "2+2" combination modes are adopted.

[0034] Specific as Figure 7As shown, the processing process is as follows: the material is loaded onto the roller, and then the first chuck 61 and the second chuck 62 clamp the pipe to be processed. Driven by the first chuck 61, the pipe moves to the right (close to the direction of the laser head) for laser cutting and tapping. As the length of the pipe extending from the laser head increases, the third chuck 63 and the fourth chuck 64 successively participate in the clamping of the pipe. Specifically, during the processing, when the pipe extends 2000mm to the right of the laser head, the third chuck 63 participates in the clamping of the pipe on the blanking side to improve the processing accuracy; when the pipe extends 3000mm to the right of the laser head, the third chuck 63 and the fourth chuck 64 simultaneously participate in the clamping of the pipe on the blanking side to improve the cutting accuracy. After the pipe is cut, the third chuck 63 and the fourth chuck 64 clamp it into The finished pipe is driven by the fourth chuck 64, and the center of the length of the finished pipe is coincident with the center of the second blanking flap 523, the third blanking flap 523, the fourth blanking flap 523, and the fifth blanking flap 523. Then the second blanking flap 523, the third blanking flap 523, the fourth blanking flap 523, and the fifth blanking flap 523 are synchronously raised to coincide with the bottom surface of the finished pipe. At this time, the third chuck 63 is released and moved to the left (towards the direction close to the laser head), and the fourth chuck 64 is released and moved to the right (away from the laser head). The finished pipe begins to descend and flip under the drive of the second blanking flap 523, the third blanking flap 523, the fourth blanking flap 523, and the fifth blanking flap 523, and the processing is completed.

[0035] When processing the final section of pipe, the "0+2" mode is used, shifting from the initial gripping between the first and second chucks 61, 62 to the gripping between the third and fourth chucks 63, 64. Due to the thickness of the chucks, the remaining pipe length must be greater than 1200 mm; otherwise, the transition from gripping between the first and second chucks 61, 62 to gripping between the third and fourth chucks 63, 64 will not be possible.

[0036] When L1≤L0≤L2, that is, the length of the tail pipe is greater than 1200mm and less than 2000mm, the "0+2" cutting mode is adopted.

[0037] Specific as Figure 8 As shown, the processing process is as follows: the initial tail material is clamped by the first chuck 61 and the second chuck 62. At this time, the first chuck 61 drives the tube to move to the right (towards the laser head), and the third chuck 63 moves to the left (towards the laser head) to clamp the tube. Then the second chuck 62 opens its jaws, and the first chuck 61 drives the tail material to continue to move to the right and enter the second chuck 62. At this time, the fourth chuck 64 moves to the left to clamp the tube. Then, the jaws of the first chuck 61 open, completing the switching clamping of the fourth chuck 64 and the third chuck 63. Then laser cutting is performed. After the cutting is completed, the third chuck 63 and the fourth chuck 64 drive the finished pipe to move to the top of the second blanking flap 523. At this time, the third chuck 63 is released and moves to the left (closer to the laser head), and the fourth chuck 64 is released and moves to the right (away from the laser head). The finished pipe begins to descend and flip under the drive of the second blanking flap 523, and the tail material processing and blanking are completed.

[0038] When L2≤L0, that is, when the tail material is greater than 2000mm, the "0+2" cutting mode is adopted.

[0039] Specific as Figure 9 As shown, the processing process is as follows: the initial tail material is clamped by the first chuck 61 and the second chuck 62. At this time, the first chuck 61 drives the tail material pipe to move to the right, and the third chuck 63 moves to the left to clamp the pipe. The first chuck 61 continues to move to the right, and the fourth chuck 64 moves to the left to clamp the pipe. Then, the claws of the first chuck 61 are opened, completing the conversion clamping of the fourth chuck 64 and the third chuck 63; then laser cutting is performed. After the cutting is completed, according to the actual length of the finished pipe, the third chuck 63 and the fourth chuck 64 drive the finished pipe to move to the top of the corresponding blanking flap 523, and then the corresponding blanking flap 523 is lowered and flipped.

[0040] Through the above processing, it is possible to process pipes weighing 800kg into finished products of any length, which can be cut and blanked. The processing of tailings larger than 1200mm can also be completed. That is, any pipe can be processed into any length, and the above profile processing method can be realized. The control logic of the whole process is simple, the blanking idea is clear, and the efficiency is higher.

[0041] When G1≤G≤G2, then A=3.

[0042] At this time, when A=3 and L1≤L0≤L4, that is, when the actual length of the finished pipe is greater than 1200mm and less than 2500mm, the "3+0" mode is adopted.

[0043] Specific as Figure 10 As shown, the material is loaded onto the roller, and then the first chuck 61, the second chuck 62 and the third chuck 63 are on the loading side, and the first chuck 61, the second chuck 62 and the third chuck 63 clamp the pipe to be processed at the same time. Driven by the first chuck 61, the pipe moves toward the laser head for laser cutting and tapping. Before the pipe is cut off, the first blanking flap 523 rises to the bottom surface of the pipe to support it, and then the pipe is cut off. The cut finished pipe begins to fall and flip under the drive of the first blanking flap 523, completing the processing and blanking.

[0044] When A=3 and L4≤L0≤L6, that is, the actual length of the finished pipe is greater than 2500mm and less than 4000mm, the "3+1" mode is adopted.

[0045] Specific as Figure 11 As shown, the material is loaded onto the roller, and then the first chuck 61, the second chuck 62 and the third chuck 63 are on the loading side, and the first chuck 61, the second chuck 62 and the third chuck 63 clamp the pipe to be processed at the same time. Driven by the first chuck 61, the pipe moves toward the laser head for laser cutting and tapping. During the cutting process, the fourth chuck 64 participates in the clamping and supporting work of the cut pipe. At the same time, the first blanking flap 523 rises and flips to support the bottom of the pipe, and then the pipe is cut. At this time, the finished pipe is supported by the first blanking flap 523 and the fourth chuck 64, and then the fourth chuck 64 drives the finished pipe to move to the right (away from the laser head) to the right side of the second blanking flap 523. During the movement, the second blanking flap 523 rises and flips to support the finished pipe. The claws of the fourth chuck 64 are released and continue to move to the right. The cut finished pipe begins to fall and flip under the drive of the first blanking flap 523 and the second blanking flap 523, completing the processing and blanking.

[0046] When A=3 and L6≤L0, that is, the actual length of the finished pipe is greater than 4000mm, the "3+1" and "2+2" combination modes are adopted.

[0047] Specific as Figure 12 As shown, the material is loaded onto the roller, and then the first chuck 61, the second chuck 62 and the third chuck 63 clamp the pipe to be processed at the same time on the loading side. Driven by the first chuck 61, the pipe moves forward (towards the laser head) for laser cutting and tapping. When the length of the finished pipe is greater than 4000 mm, the weight of the remaining unprocessed pipe is no more than 800 kg, and the cutting is stopped. The third chuck 63 moves from the loading side to the unloading side, and the cutting mode is switched from "3+1" to "2+2", and the cutting is continued. After the pipe cutting is completed, according to the actual length of the finished pipe, the third chuck 63 and the fourth chuck 64 drive the finished pipe to move to the top of the corresponding unloading flap 523, and then the corresponding unloading flap 523 descends and flips, and the processing is completed.

[0048] It should be noted that when the third chuck 63 moves to the left, it can still continue to move to the auxiliary clamping support on the feeding side to improve cutting accuracy.

[0049] It can be understood that when the weight of the remaining pipe on the feeding side is less than G1, the "2+0", "2+1", "2+2" and other modes are selected according to the actual length of the finished pipe. The specific mode selection and cutting process are the same as the above-mentioned method, so I will not go into details here.

[0050] In actual application, in addition to automatic judgment based on the pipe material, in special cases, two-clip cutting or three-clip cutting can also be manually selected, and then cutting and blanking can be continued according to the above method; if the pipe to be processed is thin and long, although it is light in weight, considering that the overhang in the middle of the thin and long pipe is large, three-clip cutting can be used; or when the cutting accuracy is particularly high, three-clip cutting can be directly selected. The above method is flexible and is applicable to pipes of any length and weight to be processed, and can be processed into finished products of any length, and can also be completed with the processing of tail materials of any length. It is simple and clear, the chucks and flaps cooperate smoothly, the connection is compact, and the cutting and blanking efficiency is higher.

[0051] Example 2 In another typical embodiment of the present invention, Figure 13 As shown, a four-chuck fully free laser tube cutting machine is proposed, comprising: a bed mechanism 1, a gantry mechanism 2, a loading roller mechanism 3, an automatic loading mechanism 4, a unloading flap mechanism 5 and a four-chuck mechanism 6, wherein the bed mechanism 1 is the base of the whole machine and supports the whole machine, the gantry mechanism 2 is fixedly installed in the middle position of the bed mechanism 1, and a cutting component 22 and a tapping component 23 are installed on the gantry mechanism 2; the gantry mechanism 2 is used to drive the movement of the end laser head and the tapping spindle Y and Z to realize cutting and hot melt tapping of the workpiece; the four-chuck mechanism 6 includes four chucks movably installed on the bed mechanism 1, and the four chucks They can all move back and forth along the guide rails on the bed to clamp the pipe and then drive the pipe to move along the direction of the bed, and can also rotate the pipe; the loading roller mechanism 3 is fixedly mounted on the bed and is located on the left side of the gantry mechanism 2 (i.e. the loading side), and is used to support, clamp, and rise the pipe to the center of the chuck for clamping by the chuck; the automatic loading mechanism 4 is located on one side of the bed and on the same side as the loading roller mechanism 3, and can transport multiple pipes to be processed to the top of the loading roller mechanism 3; the unloading flap mechanism 5 is fixedly mounted on the bed and is located on the right side of the gantry mechanism 2 (i.e. the unloading side), and is used to support the cut pipe to fall to the ground.

[0052] The bed structure 1 is welded by several sections of bed 11. Figure 14 and Figure 15As shown, a beam base 111 is fixed on the front and rear sides of the middle position of the bed mechanism 1. The beam base 111 is perpendicular to the bed 11 and is located on the unloading side. A trolley 12 for receiving short materials and waste materials is placed on the side of the beam base 111 away from the laser head. The trolley 12 is located between the gantry mechanism 2 and the first unloading flip mechanism 5. A top block for adjusting the straightness of the bed 11 is provided on the back of the bed 11. After the adjustment is completed, the two side surfaces of the adjacent bed are fixed by bolts. Linear guide rails are fixed on the top and front side of the bed 11 for the four chucks to move along the direction of the bed.

[0053] The bed 11 includes an upper auxiliary crossbeam 112 and an upper main crossbeam 113. The upper auxiliary crossbeam 112 and the upper main crossbeam 113 both extend along the length of the bed, and the upper auxiliary crossbeam 112 is located on one side of the upper main crossbeam 113. A main guide rail strip is fixedly installed above the connection between the upper auxiliary crossbeam 112 and the upper main crossbeam 113. A plurality of vertical beams 114 are provided below the upper auxiliary crossbeam 112 and the upper main crossbeam 113. An intermediate crossbeam 115 is fixedly provided through each vertical beam 114 and below the upper main crossbeam 113. The intermediate crossbeam 115 is parallel to the upper main crossbeam 113. A secondary guide rail strip is fixedly installed on the front side of the intermediate crossbeam 115. The bottom of each vertical beam 114 is fixedly connected to a The main beam 116 is perpendicular to the middle beam 115, and ground connection plates are fixed at both ends of the main beam 116. Reinforced beams 117 and bottom beams 118 are fixed between adjacent main beams 116. The reinforced beams 117 and bottom beams 118 are parallel. Reinforcement ribs 119 are fixed on the front and rear sides of the vertical beam 114. An upper plate 120 is welded to the front side of the upper main beam 113 and the middle beam 115, and a lower plate 121 is welded to the front side of the reinforced beam 117 and the middle beam 115. All beams are made of rectangular tubes or square tubes, and the rest are made of plates. The entire bed 11 is designed to be lightweight, and the entire bed 11 has greater rigidity, strength and stability.

[0054] A plurality of loading roller connecting seats 122 are fixedly provided on the reinforcing crossbeam 117 of the bed 11 on the left side of the crossbeam base 111 (i.e., the loading side) along its length direction, and a plurality of unloading roller connecting seats 123 are fixedly provided on the reinforcing crossbeam 117 of the bed 11 on the right side of the crossbeam base 111 (i.e., the unloading side) along its length direction. A laser head is installed on the gantry mechanism 2, that is, this position is the cutting working position, and a first ramp plate 124 is fixed between the crossbeam base 111 and the vertical beam 114. The height of the first ramp plate 124 is close to the bottom surface of the chuck to prevent the material from falling to the loading side and falling into the chuck through the inclined surface. The trolley 12 has a second ramp plate 125 fixedly provided between the middle crossbeam 115 and the reinforcing crossbeam 117 on the unloading side. The second ramp plate 125 is also used to assist in guiding the falling materials into the trolley 12 and to protect the rear air path. A side plate 126 is also welded between the second ramp plate 125 and the reinforcing crossbeam 117. The side plate 126 is located on the side of the second ramp plate 125 away from the gantry mechanism 2, and the side plate 126 is perpendicular to the second ramp plate, which can prevent short materials and waste materials from falling to the right, so that the short materials and waste materials can fall accurately into the trolley 12, and protect the air path of the right-side blanking flip plate.

[0055] like Figure 16 As shown, the gantry mechanism 2 includes a crossbeam 21, a cutting assembly 22, a tapping assembly 23 and a tool magazine 24. The crossbeam 21 is perpendicular to the bed 11 and is fixedly arranged above the crossbeam base 111. The two sides of the crossbeam 21 are welded together with two 200mm square tubes. The upper side of the crossbeam 21 is a 300*200mm large square tube in the middle, and the two sides are welded together with four 150*100mm small square tubes. The strip steel with guide rails and racks is welded above the adjacent positions of the large square tubes and the small square tubes. The square tubes are welded between the upper side and the two sides of the crossbeam 21 for reinforcement. The crossbeam 21 has a stable structure and high strength and can withstand the large contact force generated during tapping.

[0056] The cutting assembly 22 includes a base 221, which is a casting structure. A Y-axis motor and a reducer are installed on the base 221 to drive the entire cutting assembly 22 to move along the direction of the beam 21. A Z-axis motor is fixed above the base 221, which drives the Z-axis connecting plate 222 to move up and down through a ball screw. The laser head is fixedly installed on the laser head connecting plate 223, and the laser head connecting plate 223 is fixedly connected to the Z-axis connecting plate 222, thereby realizing the movement of the laser head in the Y and Z directions.

[0057] The tapping assembly 23 is also provided with motors for the Y and Z axes. A tapping spindle 231 is provided at the bottom end of the tapping assembly 23. The motor drives the rack and pinion and the ball screw to realize the movement of the tapping spindle 231 in the Y and Z directions. A tool magazine 24 is provided on the rear side of the beam 21. The tool magazine 24 contains 14 kinds of tools. The tapping assembly 23 can be moved to the top of the tool magazine 24. The tapping spindle 231 is moved up and down by the Z-axis motor, and the tool is changed by the tool cylinder 232 to drill and tap different sizes of holes. Then, the tapping assembly 23 is moved above the pipe. A tapping motor is provided above the tapping spindle 231. The tapping motor drives the rotation of the tapping spindle 231 to tap the pipe, thereby realizing the automation of the tapping process.

[0058] like Figure 17 As shown, the feeding roller mechanism 3 includes a support base 31, a roller lifting assembly 32 and a centering assembly 33. The support base 31 includes a mounting base 311, a first motor 312, a first reducer 313 and a gear. The mounting base 311 is fixedly mounted on the feeding roller connecting base 122 of the feeding side bed for supporting the entire roller. The first motor 312 is fixedly mounted on the mounting base 311, and the output end of the first motor 312 is connected to the gear through the first reducer 313.

[0059] The roller lifting assembly 32 includes a first slide 321, a roller 322, a rack and a linear rail. The first motor 312 installed on the mounting seat 311 drives the roller lifting assembly 32 to rise and fall through the gear rack. Specifically, the first slide 321 is slidably connected to the support base 31. A rack is fixed on the first slide 321. The rack is vertically arranged and meshes with the gear. The roller 322 is rotatably arranged above the first slide 321. The roller 322 is horizontally arranged and perpendicular to the bed 11. The roller 322 is used to support the pipe. When the pipe moves along the direction of the bed under the drive of the chuck, the bearing inside the roller 322 can rotate, which makes the entire roller module more stable.

[0060] The centering assembly 33 includes two movements, lifting and centering. Specifically, the centering assembly 33 includes a vertically arranged lifting cylinder 331. The bottom end of the lifting cylinder 331 is fixedly installed under the first slide 321 of the roller lifting assembly 32. The top is fixedly connected with a centering plate 332, which can control the vertical movement of the centering plate 332. The centering plate 332 is located on one side of the roller 322. A centering cylinder 333 is fixedly installed on the centering plate 332. The centering cylinder 333 is arranged horizontally and parallel to the roller 322. The telescopic end of the centering cylinder 333 is connected to a first connecting plate 334. The first centering roller 335 is installed on the first connecting plate 334. The first centering roller 335 is arranged vertically. The two ends of the centering plate 332 are provided with sprockets 3 36. The two sprockets 336 are connected by a chain 337, and the chain 337 forms a chain loop. A first connecting plate 334 and a second connecting plate 338 are fixedly provided at both ends of the chain loop. The first connecting plate 334 and the second connecting plate 338 are arranged opposite to each other, wherein the first connecting plate 334 is fixedly connected to the lower chain 337 of the chain loop, and the second connecting plate 338 is fixedly connected to the upper chain 337 of the chain loop. The first centering roller 335 is vertically rotatably arranged on the first connecting plate 334, and the second centering roller 339 is vertically rotatably arranged on the second connecting plate 338. The first centering roller 335 and the second centering roller 339 are relatively arranged and at the same height. The clamping and opening of the centering component 33 are achieved by the extension and contraction of the centering cylinder 333.

[0061] Specifically, in the initial state, the lifting parts of the roller lifting assembly 32 and the centering assembly 33 are both at the bottom, and the first centering roller 335 and the second centering roller 339 of the centering assembly 33 are in a state of being far away from each other. According to the diameter of the pipe to be processed, the first motor 312 lifts the roller 322 to a specified height so that the center of the pipe is at the same height as the center of the chuck. Then, the centering assembly 33 is lifted by the lifting cylinder 331, and the centering cylinder 333 is used to pull the first connecting plate 334. Under the action of the chain ring, the first centering roller 335 and the second centering roller 339 are brought close to each other to perform a clamping action so that the center of the pipe coincides with the center of the chuck on the left and right.

[0062] like Figure 18 As shown, the automatic loading mechanism 4 includes a pipe power component 41 and a pipe end positioning component 42, wherein the pipe power component 41 mainly functions to place the pipe to be processed on the chain of the power device in advance, and transports the pipe to the top of the loading roller by the rotation of the chain driven by the motor. Multiple pipes can be stored at the same time, making the loading of pipes simpler and more efficient. The pipe power component 41 is an existing structure, and the specific structure will not be described in detail here.

[0063] The pipe head positioning assembly 42 comprises a rack 421, a head plate 422, a second motor 423, a ball screw 424 and a wire rail 425. The main function of the pipe head positioning assembly 42 is to make all the pipes close to the head plate 422 at the end close to the laser head, so that the system can better confirm the position of the pipe and facilitate clamping by the chuck. Specifically, the rack 421 is fixedly installed on the ground, is located on the front side of the bed body 11 and is parallel to the bed body 11. The second motor 423, the ball screw 424 and the wire rail 425 are fixedly installed on the rack 421. The head plate 422 is vertically arranged and is perpendicular to the bed body 11. The bottom of the head plate 422 is slidably arranged on the wire rail through a sliding block. The head plate 422 is close to the gantry mechanism 2. The second motor 423 is connected with the head plate 422 through the ball screw 424 and can drive the head plate 422 to reciprocate along the length direction of the bed body 11, so that the positions of the right ends of different pipes can be different and the end portions of all the pipes can be kept in the same vertical plane.

[0064] Specifically, under the premise that the length of the bed body 11 is the same, the head plate 422 is automatically moved to the rightmost side, so that the length of the pipe to be machined is increased. According to different feeding pipes, the position of the head plate 422 can be moved to change the length of the left end of the pipe that suspends the roller of the feeding roller mechanism 3. When the suspended part of the small pipe is too long, the suspended part of the small pipe is greatly inclined, the chuck cannot be clamped and manual additional operation is required. That is, according to different pipe lengths, the position of the head plate 422 of the pipe head positioning assembly 42 is moved, so that the right end of the pipe closely abuts against the head plate 422. Then, the pipe is transported to the upper side of the roller through the pipe power assembly 41, so that the left end of the pipe suspending the roller is short. Then, the center of the pipe is coincided with the center of the chuck through the lifting and clamping of the feeding roller, so that the automatic feeding process is completed and the cutting efficiency of the whole machine is higher.

[0065] As Figure 19As shown, the blanking flipping mechanism 5 includes a lifting component 51 and a flipping component 52, wherein the lifting component 51 includes a support seat 511, a third motor 512, a second reducer 513, a second slide 514, a gear, a rack and a linear rail; the support seat 511 is fixedly mounted on the blanking roller connecting seat 123 of the blanking side bed 11, the third motor 512 is fixedly mounted on the support seat 511, the output end of the third motor 512 is connected to the gear through the second reducer 513, the second slide 514 is slidably connected to the support seat 511 through the linear rail, the second slide 514 is vertically arranged, and a vertically arranged rack is fixedly mounted on the second slide 514, which is engaged with the gear through the rack, so that the second slide 514 can be driven to move vertically by the third motor 512; the flipping component 52 includes a connecting rod 511, a third motor 512, a second reducer 513, a second slide 514, a gear, a rack and a linear rail ... reducer 513, a second reducer 513, a second reducer 513, a second reducer 514, a gear, a rack and a linear rail; the flipping component 52 includes a connecting rod Rod 521, cylinder 522, unloading flap 523 and roller 524, the second slide 514 is hinged to the unloading flap 523 through the connecting rod 521 and the cylinder 522, the unloading flap 523, the connecting rod 521 and the cylinder 522 form a triangular structure, a V-shaped groove is provided in the middle position of the unloading flap 523 to prevent the rolling of the round tube, and a roller 524 is provided on the upper surface of the unloading flap 523 for rotation, which can make the movement of the tube smoother, and the unloading flap 523 is flipped by the extension and contraction of the cylinder 522, that is, in the initial state, the unloading flap 523 is in a horizontal state, and the lifting assembly 51 is in the lowest state. When the tube is about to be cut, the lifting assembly 51 rises, the unloading flap 523 catches the tube, and then drops to the lowest point, and then the cylinder 522 retracts, driving the unloading flap 523 to flip, and the tube rolls down.

[0066] The four-chuck mechanism 6 includes a first chuck 61, a second chuck 62, a third chuck 63 and a fourth chuck 64. The first chuck 61 is a cannon-type structure and can be extended into the second chuck 62. The first chuck 61 is a hard claw that can clamp the pipe and move it; the second chuck 62 and the third chuck 63 are both hollow chucks, and there is a roller in the middle, which can only play a supporting role; the fourth chuck 64 is a hollow chuck and a hard claw that can clamp the pipe and move it. The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A profile processing method comprising: A movable first chuck (61), a second chuck (62), a third chuck (63) and a fourth chuck (64), characterized in that the combined load-bearing capacity of the first chuck (61) and the second chuck (62) is G1, the combined load-bearing capacity of the first chuck (61), the second chuck (62) and the third chuck (63) is G2, the weight of the pipe to be processed is G, and the number of chucks involved on the feeding side of the laser head during the loading and cutting process is A; When G1≤G≤G2, then A=3, and the first chuck (61), the second chuck (62) and the third chuck (63) simultaneously clamp and support the pipe on the feeding side; the pipe on the discharge side is clamped and supported by not using a chuck, using the fourth chuck (64), or using the third chuck (63) and the fourth chuck (64) according to the actual length of the finished pipe.

2. The profile processing method according to claim 1, characterized in that: The machine also includes a plurality of blanking flaps (523) spaced apart along the length direction of the bed (11), the actual finished pipe length is L0, and the designed length of the finished pipe is L1-L9; when A=3, and L1≤L0≤L4, the first chuck (61), the second chuck (62) and the third chuck (63) clamp the pipe to be processed on the loading side, the first chuck (61) drives the pipe to move toward the laser head and process it, the first blanking flap (523) supports the pipe before the pipe is cut, and then the pipe is cut, and the cut finished pipe is cut and unloaded under the drive of the first blanking flap (523).

3. The profile processing method according to claim 2, characterized in that: When A=3, and L4≤L0≤L6, the first chuck (61), the second chuck (62) and the third chuck (63) clamp the tube to be processed on the feeding side, and the first chuck (61) drives the tube to move toward the laser head and process it. During the cutting process, the fourth chuck (64) clamps and supports the tube on the unloading side. At the same time, the first unloading flap (523) supports the bottom of the tube on the unloading side. After cutting the tube, the fourth chuck (64) drives the finished tube away from the laser head. During the movement, the second unloading flap (523) supports the finished tube, and the claws of the fourth chuck (64) are loosened and removed. The finished tube is unloaded under the drive of the two unloading flaps (523).

4. The profile processing method according to claim 2, characterized in that: When A=3, and L6≤L0, the first chuck (61), the second chuck (62) and the third chuck (63) clamp the pipe to be processed on the loading side, the first chuck (61) drives the pipe to move toward the laser head and process it, the third chuck (63) moves from the loading side to the unloading side for cutting, and during the cutting process, the fourth chuck (64) clamps and supports the pipe on the unloading side. After the cutting is completed, the third chuck (63) and the fourth chuck (64) clamp the finished pipe and move it, and multiple unloading flaps (523) support the finished pipe for unloading, and the third chuck (63) and the fourth chuck (64) are released and removed.

5. The profile processing method according to claim 1, characterized in that: When G≤G1, then A=2, and the first chuck (61) and the second chuck (62) simultaneously clamp and support the pipe on the feeding side; the pipe on the unloading side is clamped and supported by not using a chuck, using a third chuck (63), or using the third chuck (63) and the fourth chuck (64) according to the actual length of the finished pipe.

6. The profile processing method according to claim 1, characterized in that: When processing the last section of the pipe, a zero tail material mode is adopted. During the cutting process, the pipe is clamped by the first chuck (61) and the second chuck (62) and then by the third chuck (63) and the fourth chuck (64).

7. A four-chuck fully free laser tube cutting machine, characterized in that: The method for processing a profile as claimed in any one of claims 1 to 6 comprises: a bed mechanism (1), a gantry mechanism (2) fixedly provided at the middle position of the bed mechanism (1), a cutting assembly (22) and a tapping assembly (23) installed on the gantry mechanism (2), and a four-chuck mechanism (6) movably installed on the bed mechanism (1); a loading roller mechanism (3) and an automatic loading mechanism (4) installed on the loading side of the gantry mechanism (2), and a loading flap mechanism (5) installed on the unloading side.

8. The four-chuck fully free laser tube cutting machine according to claim 7, characterized in that: The loading roller mechanism (3) includes a support base (31), on which a roller lifting assembly (32) and a centering assembly (33) are mounted. The roller lifting assembly (32) includes a roller (322) capable of being lifted and lowered, and the roller (322) is arranged horizontally and perpendicular to the bed mechanism (1). The centering assembly (33) is located on one side of the roller lifting assembly (32), and includes two oppositely arranged first centering rollers (335) and second centering rollers (339). The first centering rollers (335) and the second centering rollers (339) can be lifted and lowered and move closer to / away from each other.

9. The four-chuck fully free laser tube cutting machine according to claim 7, characterized in that: The automatic feeding mechanism (4) includes a pipe end positioning assembly (42), the pipe end positioning assembly (42) includes a frame (421) fixedly arranged on the ground, a second motor (423) is installed on the frame (421), the second motor (423) is connected to a head plate (422) via a ball screw (424), the head plate (422) is close to the gantry mechanism (2), and the head plate (422) can move back and forth along the length direction of the bed mechanism (1).

10. The four-chuck fully free laser tube cutting machine according to claim 7, characterized in that: The blanking flap mechanism (5) comprises a flip assembly (52) capable of being raised and lowered, the flip assembly (52) comprising a blanking flap (523) capable of being flipped around an axis, a V-shaped groove being provided at the middle position of the blanking flap (523), and a roller (524) being rotatably provided on the upper surface of the blanking flap (523).

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