A pipe cutting method for a fully free four-chuck laser pipe cutting machine

Abstract

The present invention discloses a tube cutting method for a fully free four-chuck laser tube cutting machine, which is used for a fully free four-chuck laser tube cutting machine. A laser module is provided on the bed, and a first chuck, a second chuck, a third chuck and a fourth chuck that can move along the axial direction of the bed are provided in sequence. The bed is also provided with a blanking module and a servo roller module, which includes a plurality of flaps and a supporting roller. The laser head module is fixed on the bed and its two sides are divided into a feeding side and a unloading side. The method of the present invention reasonably distributes the number of chucks involved in clamping and cutting on the feeding side and the unloading side according to the length and weight of the tube, and is adapted to the cutting processing requirements of tubes of various sizes and weights. It is conducive to improving the current laser cutting machine cutting process. During the cutting process, the tube is deformed due to its own weight, the rotational inertia and jitter generated by the rotation lead to reduced cutting accuracy, and the heavy tube has a reduced cutting accuracy due to the excessive weight affecting the chuck rotation accuracy.

Description

Technical Field

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

[0002] Laser tube cutting machines commonly used in the industry usually use two chucks to clamp the profiles to be cut, and some use a three-chuck layout. In the cutting of slender tubes and heavy tubes, due to structural limitations, the drooping deformation of the tube and the deformation of the tube's own precision make it impossible to meet the cutting accuracy requirements well. At the same time, it is impossible to meet the functions of cutting and loading while cutting, and the cutting efficiency is low. There are also some existing technologies that use non-fully free four-chuck cutting machines to meet the cutting needs of long finished parts. However, for the existing non-fully free four-chuck cutting machines, although they can take into account both the loading and unloading efficiency and the cutting accuracy, there are still problems with low precision and small load-bearing capacity for clamping and feeding longer tubes:

[0003] For example, the moment of inertia of a pipe (a measure of the inertia of a rigid body when rotating about an axis (the property of a rotating object to maintain uniform circular motion or rest)) is related to the pipe's shape, mass distribution, and the position of the axis of rotation. Generally, moment of inertia can be formally understood as an object's inertia with respect to rotational motion. The greater the moment of inertia, the more difficult it is to accelerate at the beginning of rotation and decelerate during rotation. This makes it difficult to control the start and stop of pipe rotation during processing, which in turn leads to errors in the processing, especially during the portion of the pipe before it stops rotating, affecting the final processing accuracy. Furthermore, due to the weight of the pipe, when arranged and supported over long spans, the pipe can sag and deform, causing the center of the pipe to deviate significantly from the chuck's rotation center, causing the pipe to vibrate during rotation and also reducing cutting accuracy.

[0004] This shows that the existing technology still has certain defects. Summary of the Invention

[0005] The purpose of the present invention is to provide a tube cutting method of a fully free four-chuck laser tube cutting machine, aiming to improve the current problem of reduced cutting accuracy due to deformation of the tube due to its own weight, rotational inertia and jitter generated by rotation during cutting by the laser cutting machine, and reduced cutting accuracy due to excessive weight of heavy tubes affecting the chuck rotation accuracy.

[0006] To achieve the above-mentioned object, the present invention provides a tube cutting method of a fully free four-chuck laser tube cutting machine, wherein the fully free four-chuck laser tube cutting machine includes a bed and a laser head module arranged on the bed, the laser head module is fixed to the bed and can perform cutting operations, the bed is provided with four groups of chucks in sequence along its axial direction, the four groups of chucks are respectively a first chuck, a second chuck, a third chuck and a fourth chuck, the four groups of chucks are all able to move along the axial direction of the bed, and along the axial direction of the bed, the bed on both sides of the laser head module is divided into a loading side and a unloading side; the number of the chucks located on the loading side that participate in clamping during the cutting process is defined as N1, and the number of the chucks located on the unloading side that participate in clamping during the cutting process is defined as N2; the tube length is defined as L, and five standard values ​​of tube lengths L1, L2, L3, L4 and L5 are defined; the tube weight is defined as G, and G0 is defined as the standard value of tube weight;

[0007] Including at least one or more of the following working conditions:

[0008] Working condition 1: If G≤G0 and / or L≤L1, and finished product cutting is performed, then N1≥N2 (N1≠0);

[0009] Working condition 2: If G>G0 and L2<L<L3, and finished product cutting is performed, then N1=1, N2=2;

[0010] Working condition 3: If G>G0 and L≥L3, and finished product cutting is performed, then N1≥N2 (N1≥2);

[0011] Working condition 4: If G≤G0 and tailing cutting is performed, then N1≤N2 (N2≠0);

[0012] Working condition 5: If G>G0 and tailing cutting is performed, then N1≤N2 (N1≠0).

[0013] As a preferred embodiment of the present application, the finished product cutting is to cut the pipe along the direction from the feeding side to the lower feeding side; the tail material cutting is to cut the pipe along the direction from the lower feeding side to the upper feeding side.

[0014] As a preferred embodiment of the present application, the laser head module includes a gantry arranged on the upper part of the bed, and a chuck channel is provided between the gantry and the bed for the first chuck, the second chuck, the third chuck, and the fourth chuck to pass through; the first chuck and the fourth chuck use fixed jaws, and the second chuck and the third chuck use roller jaws; the fixed jaws can pass through the roller jaws.

[0015] As a preferred embodiment of the present application, the unloading side is further provided with a blanking module, the blanking module includes a plurality of flaps, the flaps can be raised and lowered relative to the bed in the vertical direction, and the flaps can be flipped relative to the bed; the loading side and the unloading side are further provided with a servo roller module, the servo roller module includes a plurality of groups of supporting rollers arranged in sequence along the axial direction of the bed, and the supporting rollers can be raised and lowered relative to the bed in the vertical direction; the flaps and the supporting rollers can move with the pipe;

[0016] The multiple flip plates include a first blanking flip plate, a second blanking flip plate, a third blanking flip plate, a fourth blanking flip plate...an nth blanking flip plate arranged in sequence along the axial direction of the bed; the multiple groups of supporting rollers include at least a first supporting roller, a second supporting roller, a third supporting roller and a fourth supporting roller arranged on the rear side of the first blanking flip plate along the axial direction of the bed.

[0017] As a preferred embodiment of the present application, under the working conditions, at least one of the N1 chucks located on the loading side drives the pipe to move to the laser head module for cutting. After the cutting is completed, the N2 chucks and / or at least one of the N2 chucks located on the unloading side drive the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plates and / or the supporting rollers receives the finished workpiece and unloads it.

[0018] As a preferred embodiment of the present application, under the working condition 2, the N1 chucks located on the loading side drive the pipe to move to the laser head module for cutting. After the cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plate and / or the supporting roller receives the finished workpiece and unloads it.

[0019] As a preferred embodiment of the present application, under the working condition three, at least one of the N1 chucks located on the loading side drives the pipe to move to the laser head module for cutting. After the cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plates and / or at least two of the supporting rollers receive the finished workpiece and unload it.

[0020] As a preferred embodiment of the present application, under the working conditions four and five, at least one of the N2 chucks located on the unloading side drives the pipe to move to the laser head module for cutting. After the cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plate and / or the supporting roller receives the finished workpiece and unloads it.

[0021] As a preferred embodiment of the present application, under the working conditions four and five, if L>L3, after cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plates and / or at least two of the supporting rollers receive the finished workpiece and unload it.

[0022] As a preferred embodiment of the present application, under the working condition 4, while the N2 chucks on the unloading side clamp the pipe for cutting, the (4-N1-N2) chucks on the loading side can perform the loading action;

[0023] Under the working conditions 1, 2 and 3, while the N1 chucks on the loading side clamp the pipe for cutting, the (4-N1-N2) chucks on the unloading side can perform unloading.

[0024] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0025] 1. By adjusting the number of chucks involved in cutting on the loading and unloading sides and the distribution of the chucks, it can meet the cutting processing requirements of pipes of various sizes and weights. By adaptively adjusting the chuck support position, it can further control the deformation of the pipe to be cut due to its own weight during the cutting process, thereby preventing the pipe shaking from causing the pipe rotation center to deviate from the chuck clamping center, further ensuring that the center line of the laser head coincides with the center of the pipe, ensuring the accuracy of the chuck support and further improving the processing accuracy of the laser cutting machine;

[0026] 2. The four-chuck fully free mode in this application allows for three-chuck clamping during the loading and unloading of heavy and long pipes. This three-chuck loading and unloading can significantly increase the load-bearing capacity of the entire machine. This reduces the weight allocated to each chuck, and the moment of inertia that a single chuck must overcome when driving the pipe to rotate and control its stoppage is reduced. This also reduces the load on the motor driving the chuck to move / stop, making movement and stopping easier and cutting more precise. This allows for adaptability to cutting a wider range of pipe types and models, improving the versatility of the equipment.

[0027] 3. By rationally allocating the number of chucks involved in cutting on the loading and unloading sides, it is possible to achieve zero-tail cutting and to achieve both unloading and loading while cutting, greatly improving processing efficiency;

[0028] 4. In summary, the adoption of the present application solution can improve the current laser cutting machine's cutting process, in which the pipe is deformed by its own weight, the rotational inertia and jitter generated by rotation lead to reduced cutting accuracy, and the heavy pipe has excessive weight that affects the chuck rotation accuracy, resulting in reduced cutting accuracy. At the same time, it is beneficial to improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a fully free four-chuck laser tube cutting machine in an example;

[0031] Figure 2 This is a schematic diagram of the structures of the first chuck, the second chuck, the third chuck, and the fourth chuck in an example;

[0032] Figure 3 Schematic diagram of the cutting process.

[0033] List of parts and reference numerals:

[0034] 1 bed;

[0035] 2 laser head modules;

[0036] 3. Material receiving module;

[0037] 4 first chuck;

[0038] 5 blanking module;

[0039] 6 second chuck;

[0040] 7 centering modules;

[0041] 8 third chuck;

[0042] 9 fourth chuck;

[0043] 10 servo roller modules. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0045] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0046] In one example, referring to Figure 1 As shown, the fully free four-chuck laser tube cutting machine in the present application includes a bed 1 and a laser head module 2, a blanking module 5, a servo roller module 10 and four groups of chucks arranged in sequence along the axial direction of the bed 1. The four groups of chucks are respectively the first chuck 4, the second chuck 6, the third chuck 8 and the fourth chuck 9, and are all able to move relative to the bed 1 along the axial direction of the bed 1. Among them, the laser head module 2 includes a gantry fixedly connected to the bed 1 and a laser head arranged on the gantry. The laser head can move relative to the gantry in the vertical and horizontal directions to complete the cutting action. A chuck channel is also surrounded between the gantry and the bed 1 for the aforementioned four groups of chucks to pass through. Furthermore, along the axial direction of the bed 1, the bed 1 on both sides of the laser head module 2 is divided into a loading side and a unloading side. As a preferred embodiment of the present application, it also includes a centering module 7 and a receiving module 3. The centering module 7 is arranged on the loading side and adjacent to the laser head module 2. The receiving module 3 is arranged on the side of the bed 1 on the unloading side for receiving finished parts.

[0047] The number of chucks on the unloading side involved in the cutting process is defined as N1, and the number of chucks on the loading side involved in the cutting process is defined as N2; the pipe length is defined as L, and five standard values ​​of pipe length are defined as L1, L2, L3, L4, and L5; the pipe weight is defined as G, and G0 is defined as the standard value of pipe weight. Finished product cutting is cutting the pipe from the loading side to the lower feeding side; tail material cutting is cutting the pipe from the unloading side to the upper feeding side. The fully free four-chuck laser pipe cutting machine in this application includes at least one or more of the following working conditions during use:

[0048] Working condition 1: If G≤G0 and / or L≤L1, and finished product cutting is performed, then N1≥N2 (N1≠0);

[0049] Working condition 2: If G>G0, L2<L<L3, and finished product cutting is performed, then N1=1, N2=2;

[0050] Working condition three: If G>G0, L≥L3, and finished product cutting is performed, then N1≥N2 (N1≥2);

[0051] Working condition 4: If G≤G0 and tailing cutting is performed, then N1≤N2 (N2≠0);

[0052] Working condition 5: If G>G0 and tailing cutting is performed, then N1≤N2 (N1≠0).

[0053] It should be noted that this application does not impose specific limitations on the values ​​of L1, L2, L3, L4, L5, and G0. Preferably, 0.2m < L1 < L2 < L3 < L4 < L5 ≤ 25m is selected, and the maximum load-bearing value of a single chuck is selected as G0. Of course, this selection is only one preferred embodiment of this application and can be adaptively adjusted based on actual processing conditions and / or process requirements.

[0054] As a preferred embodiment of this application, refer to Figure 2 As shown, the first chuck 4 and the fourth chuck 9 use fixed jaws, and the second chuck 6 and the third chuck 8 use roller jaws; preferably, the fixed jaws use barrel-type rear clamps, so that the fixed jaws can easily pass through the roller jaws and keep holding the pipe.

[0055] In the above scheme, preferably, the present application adopts a motor as the power for each chuck to drive the pipe to rotate. As a preferred embodiment of the present application, a rotational inertia monitoring device is also provided. The rotational inertia monitoring device is connected with each motor and can monitor the various working data of the motor (rotation speed, power, etc.), and obtain the rotational inertia change data / trend of the pipe during the processing by statistically calculating the working data of the motor. Then, according to the rotational inertia change data / trend, the number of chucks used and the setting position of the chuck are adaptively adjusted in a timely manner during the processing, thereby ensuring that the current laser cutting machine can improve the problem of reduced cutting accuracy due to deformation of the pipe due to its own weight, rotational inertia and jitter generated by rotation, and the problem of reduced cutting accuracy due to excessive weight of heavy pipes affecting the chuck rotation accuracy, thereby improving processing efficiency.

[0056] In addition, compared with the traditional method of simply using the length of the pipe as the judgment standard for the number of chucks used and the position of the chucks used, the solution of the present invention can more conveniently monitor and judge the changes in the distribution trend of the pipe weight on the chuck by adding the pipe weight as a judgment standard, thereby more accurately adjusting the number of chucks used and the position of the chucks used to ensure processing accuracy.

[0057] Further, refer to Figure 1As shown, the blanking module 5 includes a plurality of flaps and a drive assembly connected to the flaps. Under the drive of the drive assembly, the flaps can be raised and lowered relative to the bed 1 in the vertical direction, and the flaps can be flipped relative to the bed 1. A servo roller module 10 is also provided on the loading and unloading sides. The servo roller module 10 includes a plurality of groups of supporting rollers arranged in sequence along the axial direction of the bed 1 and a servo drive device connected to the supporting rollers. In the vertical direction, under the drive of the servo drive device, the supporting rollers can be raised and lowered relative to the bed 1. As a preferred embodiment of the present application, under the drive of the aforementioned drive assembly and the servo drive device, the flaps and supporting rollers can keep moving with the pipes, which is convenient for receiving and unloading materials and can also play the role of auxiliary support, thereby providing additional support during the cutting of heavy or long pipes, further improving / avoiding the problem that the cutting accuracy is reduced due to deformation of the pipe due to its own weight, the rotational inertia and jitter generated by the rotation, and the cutting accuracy is reduced due to the excessive weight of the heavy pipe affecting the chuck rotation accuracy.

[0058] In one example, referring to Figure 1 As shown, the multiple flaps include a first blanking flap, a second blanking flap, a third blanking flap, a fourth blanking flap...the nth blanking flap arranged in sequence along the axial direction of the bed 1; the multiple groups of supporting rollers include at least a first supporting roller, a second supporting roller, a third supporting roller and a fourth supporting roller arranged on the rear side of the first blanking flap along the axial direction of the bed 1.

[0059] The following is a further explanation of the tube cutting method of the fully free four-chuck laser tube cutting machine in this application through several specific embodiments, so that those skilled in the art can understand the technical solution of this application. It should be noted that the following embodiments are only some preferred examples of this application and can be adjusted or combined according to actual needs.

[0060] In the following embodiments, L1, L2, L3, L4, and L5 are set to 1m, 2m, 3m, 7m, and 9m, respectively. G0 is set to 400kg, indicating a maximum load capacity of 400kg for a single chuck. This is provided for ease of understanding only. L1, L2, L3, L4, and L5 can be adjusted based on actual processing conditions and / or process requirements. The value of G0 can also be adjusted based on the actual chuck load capacity and / or process requirements.

[0061] Example 1: L<L1, G<G0, cutting finished parts, meeting working condition 1, using the "1+0" mode, i.e., N1=1, N2=0; the specific steps are as follows:

[0062] s1, loading;

[0063] s2, the first chuck 4 clamps the tube and passes it through the second chuck 6 and drives the tube toward the laser head module 2 to move under the laser head and start cutting. During this process, although the tube passes through the second chuck 6, the second chuck 6 does not participate in the clamping;

[0064] s3, the first blanking flap rises to a certain height to receive the material. After cutting, the first blanking flap lifts the finished part and descends to the flip height before flipping to complete the blanking.

[0065] Example 2: L2<L<L3, G<G0, cutting finished parts, meeting working condition 1, using the "2+0" mode, that is, N1=2, N2=0; the specific steps are as follows:

[0066] s1, loading;

[0067] s2, the first chuck 4 and the second chuck 6 clamp the tube and move the tube toward the laser head module 2 to the bottom of the laser head to start cutting;

[0068] s3, the first blanking flap rises to a certain height to receive the material. After cutting, the first blanking flap lifts the finished part and descends to the flip height before flipping to complete the blanking.

[0069] Example 3: L4<L<L5, G<G0, cutting finished parts, meeting working condition 1, using the "3+0" mode, that is, N1=3, N2=0; the specific steps are as follows:

[0070] s1, loading;

[0071] s2, the first chuck 4, the second chuck 6, and the third chuck 8 clamp the tube and move the tube toward the laser head module 2 to the bottom of the laser head to start cutting;

[0072] S3, the first blanking flap rises to a certain height to receive the material. After cutting, the first blanking flap lifts the finished part and descends to the flip height before flipping, completing the blanking of one finished part.

[0073] s4: If the remaining pipe material still meets the requirements for cutting finished parts after processing a finished part, repeat s2-s3; otherwise, end the operation.

[0074] Example 4: L2<L<L3, G>G0, cutting finished parts, meeting working condition 2, using the "1+2" ​​mode, i.e. N1=1, N2=2; the specific steps are as follows:

[0075] s1, loading;

[0076] s2, the first chuck 4 clamps the tube on the feeding side and passes it through the second chuck 6, the third chuck 8 and the fourth chuck 9 clamp the tube on the unloading side, and the first chuck 4, the third chuck 8 and the fourth chuck 9 jointly clamp the tube and move it toward the laser head module 2 to the bottom of the laser head to start cutting;

[0077] s3, the first chuck 4 releases the tail material to let it fall, and the third chuck 8 and the fourth chuck 9 jointly clamp the finished part and move it away from the laser head module 2; the third chuck 8 is released, and the fourth chuck 9 clamps the pipe and moves it toward the laser head module 2 to above the first blanking flap;

[0078] s4, the first blanking flap rises to a certain height to receive the material, the fourth chuck 9 releases the finished part, and after cutting, the first blanking flap lifts the finished part and descends to the flip height and flips to complete the blanking.

[0079] Example 5: L3<L<L4, G>G0, cutting finished parts, meeting working condition 3, using the "2+1" mode, i.e. N1=2, N2=1; the specific steps are as follows:

[0080] s1, loading;

[0081] s2, the first chuck 4 and the second chuck 6 clamp the pipe on the feeding side, and the fourth chuck 9, which is a cannon-type rear clamp, passes through the roller-type clamping claw of the third chuck 8 to hold the pipe on the unloading side;

[0082] In step s3, the second chuck 6 is positioned close to the laser head module 2 and its relative position to the laser head module 2 along the axial direction of the bed 1 is fixed. The first chuck 4 pushes and / or the fourth chuck 9 pulls the tube from the loading side to the unloading side to move under the laser head, and cutting begins. During the cutting process, the first blanking flap rises and moves with the tube.

[0083] S4, after processing a finished part, the fourth chuck 9 releases the finished part, and after cutting, the first blanking flap lifts the finished part and descends to the flip height and flips over, completing the blanking of a finished part;

[0084] s5: If the remaining pipe material still meets the requirements for cutting finished parts after processing a finished part, repeat s2-s4; otherwise, end the operation.

[0085] Example 6: L4<L<L5, G>G0, cutting finished parts, meeting working condition 3, using the "3+1" mode, i.e. N1=3, N2=1; the specific steps are as follows:

[0086] s1, loading;

[0087] s2, the first chuck 4, the second chuck 6, and the third chuck 8 clamp the pipe on the feeding side, and the fourth chuck 9 holds the pipe on the unloading side;

[0088] s3, the third chuck 8 is close to the laser head module 2 and its relative position with the laser head module 2 along the axial direction of the bed 1 is kept fixed. The first chuck 4 pushes and / or the fourth chuck 9 pulls the tube from the loading side to the unloading side to move under the laser head, and cutting begins;

[0089] S4, after cutting a finished part, the fourth chuck 9 clamps the tube and moves away from the laser head module 2 to above the first blanking flap. The first blanking flap rises to a predetermined height to receive the material. After cutting, the first blanking flap lifts the finished part and descends to the flip height before flipping, completing the blanking of a finished part.

[0090] s5: If the remaining pipe material still meets the requirements for cutting finished parts after processing a finished part, repeat s2-s4; otherwise, end the operation.

[0091] Example 7: L<L1, G<G0, cutting tailings, meeting working condition 4, adopting the "0+1" mode, that is, N1=0, N2=1; the specific steps are as follows:

[0092] s1, loading;

[0093] s2, the fourth chuck 9 clamps the tube and passes it through the third chuck 8 and drives the tube toward the laser head module 2 to move under the laser head and start cutting. During this process, although the tube passes through the third chuck 8, the third chuck 8 does not participate in the clamping;

[0094] s3. After the processing is completed, the third chuck 8 and the fourth chuck 9 move away from the laser head module 2 to the side of the first blanking flap away from the laser head module 2. The fourth chuck 9 drives the finished part after cutting the tail material to move to the top of the first blanking flap. The first blanking flap rises to a certain height to receive the material. The fourth chuck 9 releases the finished part. The first blanking flap lifts the finished part after cutting the tail material and descends to the flipping height and flips over to complete the blanking.

[0095] Example 8: L2<L<L3, G<G0, cutting tailings, meeting working condition 4, adopting the "0+2" mode, that is, N1=0, N2=2; the specific steps are as follows:

[0096] s1, loading;

[0097] s2, the third chuck 8 and the fourth chuck 9 clamp and drive the tube toward the laser head module 2 and move it under the laser head to start cutting;

[0098] s3. After the processing is completed, the third chuck 8 and the fourth chuck 9 drive the finished part after cutting the tail material to move away from the laser head module 2 to the side where the third chuck 8 and the fourth chuck 9 are located away from the laser head module 2. The fourth chuck 9 drives the finished part after cutting the tail material to move above the first blanking flip plate. The first blanking flip plate rises to a certain height to receive the material. The fourth chuck 9 releases the finished part. The first blanking flip plate lifts the finished part after cutting the tail material and descends to the flipping height and flips over to complete the unloading.

[0099] Example 9: L4<L<L5, G<G0, cutting tailings, meeting working condition 4, adopting the "0+3" mode, that is, N1=0, N2=3; the specific steps are as follows:

[0100] s1, loading;

[0101] s2, the second chuck 6, the third chuck 8, and the fourth chuck 9 jointly clamp the tube, and the fourth chuck 9 pushes the tube toward the laser head module 2 and moves it under the laser head to start cutting;

[0102] S3, after the processing is completed, the second chuck 6, the third chuck 8, and the fourth chuck 9 drive the finished workpiece after the cutting of the tailings to move above the first supporting roller, the second supporting roller, the third supporting roller, and the fourth supporting roller. The first supporting roller, the second supporting roller, the third supporting roller, and the fourth supporting roller rise to support the finished workpiece after the cutting of the tailings;

[0103] s4, the second chuck 6 and the third chuck 8 release the finished part after cutting the tailings and move it toward the laser head module 2, the fourth chuck 9 releases the finished part after cutting the tailings and moves it away from the laser head module 2, the first supporting roller, the second supporting roller, the third supporting roller, and the fourth supporting roller support the finished part after cutting the tailings and lower it to complete the unloading.

[0104] Example 10: L<L1, G>G0, cutting tailings, meeting working condition five, using the "1+1" mode, i.e., N1=1, N2=1; the specific steps are as follows:

[0105] s1, loading;

[0106] In step s2, the barrel-type rear clamp of the first chuck 4 passes through the roller-type clamping jaw of the second chuck 6 to clamp the pipe on the feeding side. The barrel-type rear clamp of the fourth chuck 9 passes through the roller-type clamping jaw of the third chuck 8 to clamp the pipe on the unloading side, and drives the pipe to move so that the tail cutting position is under the laser head for cutting.

[0107] s3. After the processing is completed, the first chuck 4 releases the tail material to make it fall, the first chuck 4 and the second chuck 6 move away from the laser head module 2, the third chuck 8 and the fourth chuck 9 move away from the laser head module 2 to the back side of the first blanking flip plate, the first blanking flip plate rises to a certain height to receive the material, the fourth chuck 9 releases the finished part, the first blanking flip plate lifts the finished part after cutting the tail material and descends to the flipping height and flips over to complete the blanking.

[0108] Example 11: L2<L<L3, G>G0, cutting tailings, meeting working condition 5, adopting the "1+2" ​​mode, i.e. N1=1, N2=2; the specific steps are as follows:

[0109] s1, loading;

[0110] In step 2, the barrel-type rear clamp of the first chuck 4 passes through the roller-type clamping claw of the second chuck 6 to clamp the pipe on the feeding side. The third chuck 8 and the fourth chuck 9 hold the pipe on the unloading side, driving the pipe to move so that the tail cutting position is under the laser head for cutting.

[0111] s3. After the processing is completed, the first chuck 4 releases the tail material to make it fall. The third chuck 8 and the fourth chuck 9 hold the finished part after cutting the tail material and move it away from the laser head module 2 to the rear side of the first blanking flip plate. The third chuck 8 releases the finished part. The fourth chuck 9 pushes the finished part to the top of the first blanking flip plate. The first blanking flip plate rises to a certain height to receive the material. The fourth chuck 9 releases the finished part. The first blanking flip plate lifts the finished part after cutting the tail material and descends to the flipping height and flips over to complete the unloading.

[0112] Example 12: L4<L<L5, G>G0, cutting tailings, meeting working condition five, using the "1+3" mode, i.e. N1=1, N2=3; the specific steps are as follows:

[0113] s1, loading;

[0114] S2, the first chuck 4 clamps the tube on the feeding side, and the second chuck 6, the third chuck 8, and the fourth chuck 9 hold the tube on the unloading side, driving the tube to move so that the tail cutting position is under the laser head for cutting;

[0115] S3, after the processing is completed, the second chuck 6, the third chuck 8, and the fourth chuck 9 drive the finished workpiece after the cutting of the tailings to move above the first supporting roller, the second supporting roller, the third supporting roller, and the fourth supporting roller. The first supporting roller, the second supporting roller, the third supporting roller, and the fourth supporting roller rise to support the finished workpiece after the cutting of the tailings;

[0116] s4, the second chuck 6 and the third chuck 8 release the finished part after cutting the tailings and move it toward the laser head module 2, the fourth chuck 9 releases the finished part after cutting the tailings and moves it away from the laser head module 2, the first supporting roller, the second supporting roller, the third supporting roller, and the fourth supporting roller support the finished part after cutting the tailings and lower it to complete the unloading.

[0117] Example 13: L3 < L < L4, G > G0 or G < G0, cutting finished parts or cutting tailings, in this case, the more common "2+2" mode can be adopted, that is, N1 = 2, N2 = 2; the specific steps are as follows:

[0118] s1, loading;

[0119] In step s2, the first chuck 4 and the second chuck 6 clamp the tube on the feeding side, and the third chuck 8 and the fourth chuck 9 clamp the tube on the unloading side. They move the tube so that the position to be processed is under the laser head, and the cutting process begins.

[0120] s3. After the processing is completed, the third chuck 8 and the fourth chuck 9 jointly clamp the finished part and move it away from the laser head module 2 to above the first supporting roller and / or the second supporting roller and / or the third supporting roller and / or the fourth supporting roller, and the first supporting roller and / or the second supporting roller and / or the third supporting roller and / or the fourth supporting roller are lifted to support the finished part; the third chuck 8 releases the finished part and moves it away from the first supporting roller, and the fourth chuck 9 releases the finished part and moves it away from the second supporting roller; the first supporting roller and / or the second supporting roller and / or the third supporting roller and / or the fourth supporting roller support the finished part and lower it to complete the unloading.

[0121] In particular, under working condition four, while the N2 chucks on the unloading side clamp the pipe for cutting, the (4-N1-N2) chucks on the loading side can perform the loading action, such as when the "0+2" mode in the aforementioned embodiment 8 is adopted, while the third chuck 8 and the fourth chuck 9 clamp the pipe for cutting the tail material, the first chuck 4 and the second chuck 6 on the loading side can perform the loading action; under working conditions one, two, and three, while the N1 chucks on the loading side clamp the pipe for cutting, the (4-N1-N2) chucks on the unloading side can perform the unloading action, such as when the "2+2" mode in the aforementioned embodiment 13 is adopted, while the third chuck 8 and the fourth chuck 9 perform the unloading action of a finished part, the first chuck 4 and the second chuck 6 on the loading side can clamp the remaining pipe for cutting the next finished part.

[0122] It should be noted here that the above embodiments are only some preferred examples of the invention scheme in the application process. The processing mode in each embodiment can be operated independently or adaptively adjusted between multiple processing modes according to actual processing requirements during the processing to ensure the processing accuracy of each finished part and to ensure processing efficiency; the processing modes in the above embodiments can be freely selected and / or used in combination during a single pipe processing process, and this application does not make specific restrictions on this.

[0123] The technical solutions protected by the present invention are not limited to the above-described embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of the present invention. Although the present invention has been described in detail above using general descriptions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on the present invention. Therefore, such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A tube cutting method using a fully free four-chuck laser tube cutting machine, characterized in that: The fully free four-chuck laser tube cutting machine includes a bed and a laser head module arranged on the bed, the laser head module is fixed to the bed and can perform cutting operations, the bed is provided with four groups of chucks in sequence along its axial direction, the four groups of chucks are respectively a first chuck, a second chuck, a third chuck and a fourth chuck, the four groups of chucks are all able to move along the axial direction of the bed, along the axial direction of the bed, the two sides of the laser head module are respectively set as the loading side and the unloading side; the number of the chucks located on the loading side that participate in the clamping during the cutting process is defined as N1, and the number of the chucks located on the unloading side that participate in the clamping during the cutting process is defined as N2; the pipe length is defined as L, and five standard values ​​of pipe lengths L1, L2, L3, L4 and L5 are defined, L1<L2<L3<L4<L5; the pipe weight is defined as G, and G0 is defined as the standard value of pipe weight; Include at least one of the following working conditions: Working condition 1: If G≤G0 and / or L≤L1, and finished product cutting is performed, then N1≥N2 (N1≠0); Working condition 2: If G>G0 and L2<L<L3, and finished product cutting is performed, then N1=1, N2=2; Working condition 3: If G>G0 and L≥L3, and finished product cutting is performed, then N1≥N2 (N1≥2); Working condition 4: If G≤G0 and tailing cutting is performed, then N1≤N2 (N2≠0); Working condition 5: If G>G0, and tailing cutting is performed, then N1≤N2 (N1≠0); The finished product cutting is to cut the pipe along the direction from the feeding side to the lower feeding side; the tail material cutting is to cut the pipe along the direction from the lower feeding side to the upper feeding side.

2. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 1, characterized in that: The laser head module includes a gantry arranged on the upper part of the bed, and a chuck channel is provided between the gantry and the bed for the first chuck, the second chuck, the third chuck, and the fourth chuck to pass through; the first chuck and the fourth chuck use fixed jaws, and the second chuck and the third chuck use roller jaws; the fixed jaws of the first chuck and the fourth chuck can pass through the roller jaws of the second chuck and the third chuck.

3. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 2, characterized in that: The unloading side is further provided with a blanking module, which includes a plurality of flaps, which can be raised and lowered relative to the bed in the vertical direction, and the flaps can be flipped relative to the bed; the loading side and the unloading side are further provided with a servo roller module, which includes a plurality of groups of supporting rollers arranged in sequence along the axial direction of the bed, and the supporting rollers can be raised and lowered relative to the bed in the vertical direction; the flaps and the supporting rollers can move with the pipe; The multiple flip plates include a first blanking flip plate, a second blanking flip plate, a third blanking flip plate, a fourth blanking flip plate...an nth blanking flip plate arranged in sequence along the axial direction of the bed; the multiple groups of supporting rollers include at least a first supporting roller, a second supporting roller, a third supporting roller and a fourth supporting roller arranged on the rear side of the first blanking flip plate along the axial direction of the bed.

4. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 3, characterized in that: Under the working conditions, at least one of the N1 chucks located on the loading side drives the pipe to move to the laser head module for cutting. After the cutting is completed, the N2 chucks and / or at least one of the N2 chucks located on the unloading side drive the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plates and / or the supporting rollers receives the finished workpiece and unloads it.

5. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 3, characterized in that: Under the second working condition, the N1 chucks located on the loading side drive the pipe to the laser head module for cutting. After the cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to the upper part of the flip plate or the servo roller module, and at least one of the flip plate and / or the supporting roller receives the finished workpiece and unloads it.

6. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 3, characterized in that: Under the working condition three, at least one of the N1 chucks located on the loading side drives the pipe to move to the laser head module for cutting. After the cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to move to the upper part of the flip plate or the servo roller module. At least one of the flip plates and / or at least two of the supporting rollers receive the finished workpiece and unload it.

7. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 3, characterized in that: Under the working conditions four and five, at least one of the N2 chucks located on the unloading side drives the pipe to move to the laser head module for cutting. After the cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plates and / or the supporting rollers receives the finished workpiece and unloads it.

8. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 3, characterized in that: Under the working conditions four and five, if L>L3, after cutting is completed, at least one of the N2 chucks located on the unloading side drives the finished workpiece to move to the upper part of the flip plate or the servo roller module, and at least one of the flip plates and / or at least two of the supporting rollers receive the finished workpiece and unload it.

9. The tube cutting method of the fully free four-chuck laser tube cutting machine according to claim 1, characterized in that: Under the fourth working condition, the N2 chucks on the unloading side clamp the pipe for cutting while the (4-N1-N2) chucks on the loading side can load the pipe; Under the working conditions 1, 2 and 3, while the N1 chucks on the loading side clamp the pipe for cutting, the (4-N1-N2) chucks on the unloading side can perform unloading.

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