Hole tube on-line laser cutting device and cutting method

Abstract

The application discloses hole pipe online laser cutting equipment, which comprises a workbench, a cutting box body, a measuring mechanism, an identification mechanism, a clamping mechanism, a cutting mechanism and a receiving mechanism, wherein the hole pipe sequentially passes through the measuring mechanism, the identification mechanism, the clamping mechanism, the cutting mechanism and the receiving mechanism; the measuring mechanism and the identification mechanism are connected to the workbench; the clamping mechanism, the cutting mechanism and the receiving mechanism are connected to the cutting box body and can move along the axial direction of the hole pipe; a control box is connected to the side of the cutting box body and is electrically connected to the measuring mechanism, the identification mechanism, the clamping mechanism, the cutting mechanism and the receiving mechanism. The application also discloses a hole pipe online laser cutting method. The application has the advantages that the unqualified part of the pipe material can be identified, the error caused by punching can be fed back in real time, the cutting precision is ensured, the pipe is cut while the pipe is manufactured, the cutting speed is matched with the pipe manufacturing speed, the pipe is cut in real time, and the cutting efficiency is improved.

Description

Technical Field

[0001] This invention relates to a cutting device, and more particularly to an online laser cutting device and method for perforated tubes. Background Technology

[0002] The production process of perforated decorative tail tubes has always been quite complicated, primarily due to the complexity of the perforated tube manufacturing process and the material's production characteristics. The rolled material is leveled and then enters the first process, punching. Due to material expansion and contraction, and localized deformation, production errors occur in the hole spacing outside the punching die. As the entire roll of material is produced, the accumulated error in hole spacing becomes larger. After punching, the rolled material is placed on the tube-making machine's feeding rack. The sheet material is then processed through tube-making dies and welded to finally form a round tube shape.

[0003] Due to hole spacing errors, ordinary offline laser tube cutting cannot meet the dimensional accuracy requirements of the next process. Therefore, short tube cutting must be completed manually using a lathe and fixed-length fixtures. The entire process of punching, transferring, making 6-meter long hole tubes, transferring, and cutting short tubes with a lathe is time-consuming, labor-intensive, and inefficient.

[0004] Existing technologies also include online laser cutting settings, such as CN108526713A, which describes a method for weld detection and automatic avoidance in a laser tube cutting machine. This method involves setting up a laser cutter, an image detection sensor, a CNC motion control system, and a nesting software module. The CNC motion control system is electrically connected to the image detection sensor, and the nesting software is also electrically connected to the CNC motion control system. The CNC motion control system controls the rotation of the tube, and during this rotation, the image detection sensor acquires weld images in real time. Then, based on the feedback signal from the image detection sensor, the CNC motion control system records the corresponding chuck rotation axis coordinates and offsets the square tube to be processed. By combining the CNC motion control system with vision sensor technology, intelligent cutting can be achieved. However, since this method is designed for weld detection, it is not suitable for tubes with holes, as it does not perform hole spacing detection. Therefore, it is necessary to design laser cutting equipment and methods adapted to the specific characteristics of different parts.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by this invention is: how to solve the problem that errors in hole spacing caused by the production and materials of perforated tubes in the prior art can only be identified manually, resulting in low efficiency and time-consuming and labor-intensive process of cutting long perforated tubes into shorter ones.

[0007] The present invention solves the above-mentioned technical problems through the following technical means:

[0008] The online laser cutting equipment for perforated tubes includes a worktable and a cutting box, and further includes a measuring mechanism, an identification mechanism, a clamping mechanism, a cutting mechanism, and a receiving mechanism that pass through the perforated tube in sequence. The measuring mechanism and the identification mechanism are connected to the worktable, and the clamping mechanism, the cutting mechanism, and the receiving mechanism are all connected to the cutting box and can move along the axial direction of the perforated tube. The equipment also includes a control box, which is connected to the side of the cutting box and electrically connected to the measuring mechanism, the identification mechanism, the clamping mechanism, the cutting mechanism, and the receiving mechanism.

[0009] This invention is arranged sequentially with a tube-making machine at the front end. The perforated tube produced by the tube-making machine enters the laser cutting equipment, thus forming a simultaneous tube-making and cutting process. The measuring mechanism in this invention is used to record the length of the perforated tube, and the identification mechanism is used to identify unqualified perforated tubes. The identification mechanism feeds back to the control box, and the unqualified part is cut off. At the same time, the latter half of the unqualified part is cut off to distinguish between qualified and unqualified sections. This invention can identify the tube hole and hole spacing, and provide real-time feedback on the error caused by punching. The measuring mechanism measures in real time to ensure cutting accuracy. The tube is made and cut simultaneously, matched with the tube-making speed, and cut online in real time.

[0010] Preferably, it further includes a laser sensing mechanism, which is connected to the worktable and located between the identification mechanism and the clamping mechanism, and is connected to the control box.

[0011] The laser sensing mechanism records the location of defective holes, which facilitates process improvement for frequently occurring defective holes in the future. At the same time, the laser sensing mechanism can record the hole spacing and identify situations where the hole spacing is unacceptable.

[0012] Preferably, the measuring mechanism is an encoder measuring mechanism, and the recognition end of the recognition mechanism is a camera.

[0013] Preferably, the bottom of the clamping mechanism is movably connected to the cutting box along the axial direction of the tube. The cutting mechanism includes a rotating platform and a cutter, the cutter being connected to the rotating platform, and the rotating platform being connected to the side of the clamping mechanism.

[0014] The clamping mechanism is used to straighten the tube during cutting, holding it in place to maintain stability. The cutting mechanism is a laser circumferential cutting mechanism, which provides excellent cutting results. Both the clamping and cutting mechanisms are movable to enhance flexibility of use.

[0015] Preferably, the receiving mechanism includes a receiving component and a receiving slide. The bottom of the receiving component is movably connected to the cutting box along the axial direction of the tube. The receiving slide is located on one side of the receiving component, and the receiving plate is inclined.

[0016] Preferably, the receiving mechanism further includes a slag suction assembly, which includes a slag suction pipe that can move along the axial direction of the perforated pipe, a slag suction bracket, and a slag suction guide rail. During the cutting process of the perforated pipe, one end of the slag suction pipe extends into the perforated pipe; the slag suction bracket is connected to the other end of the slag suction pipe, and the slag suction bracket is slidably connected to the slag suction guide rail.

[0017] Preferably, the receiving mechanism further includes a backstop mechanism for pushing the cut tube out of the suction tube after cutting. The backstop mechanism is connected inside the cutting box and located between the receiving assembly and the suction bracket. The suction tube passes through the top of the backstop mechanism.

[0018] The slag suction pipe not only picks up the debris generated during the cutting process, but also supports the borehole tube during the cutting process. After the cutting is completed, the slag suction pipe is continuously pushed out of the borehole tube by the slag suction bracket along the slag suction guide rail. At this time, the anti-reverse limiting mechanism ensures that the borehole tube will not be carried away by the slag suction pipe. After the slag suction pipe is completely withdrawn from the borehole tube, the receiving component completely catches the borehole tube and slides the borehole tube down from the receiving slide for storage.

[0019] The present invention also discloses a cutting method using the above-mentioned online laser cutting equipment for perforated tubes. During normal operation, the measuring mechanism records the length of the perforated tube and feeds the length of the perforated tube back to the control box. When the perforated tube is transported to the preset length, the control box controls the clamping mechanism to clamp the perforated tube, the cutting mechanism to cut the perforated tube, and the receiving mechanism to receive the cut perforated tube.

[0020] The distance between the identification mechanism and the cutting mechanism is L1. When the identification mechanism identifies an unsuitable hole, the control box controls the measuring mechanism to re-record the travel length. After traveling L1, the control box controls the cutting mechanism to cut, and the measuring mechanism re-records the length. When the difference between the preset length L and L1 of the traveled hole tube is reached, the cutting mechanism cuts again.

[0021] Preferably, it also includes a laser sensing mechanism, which is connected to the worktable and located between the identification mechanism and the clamping mechanism, and is connected to the control box;

[0022] The control box stores the relative position between the laser sensing mechanism and the recognition mechanism. When the recognition mechanism detects a defective hole, the control box controls the laser sensing mechanism to record the number of rows of holes. The difference between the recorded number of rows and the relative position is used to obtain the number of rows where the defective hole is located.

[0023] Preferably, the laser sensor records the number of rows and the spacing between the holes. When the spacing between the holes is found to be different from the preset value, the control box controls the measuring mechanism to re-record the travel length. When the travel reaches the distance L3 between the standard position of the row of holes and the end, the cutting mechanism performs cutting. At the same time, the measuring mechanism re-records the travel length. When the travel reaches the difference between the preset length of the hole tube and L3 again, the cutting mechanism performs cutting.

[0024] The advantages of this invention are:

[0025] (1) The present invention and the front-end tube making machine are arranged in sequence. The tube with holes made by the tube making machine enters the laser cutting equipment, so that tube making and cutting are carried out simultaneously. The measuring mechanism in the present invention is used to record the length of the tube travel, and the identification mechanism is used to identify unqualified tubes. The identification mechanism feeds back to the control box, and the unqualified part is cut off. At the same time, the latter half of the unqualified part is cut off to distinguish between qualified and unqualified parts. The present invention can identify the tube hole and hole spacing, and provide real-time feedback on the error caused by punching. The measuring mechanism measures in real time to ensure cutting accuracy. The tube is made and cut at the same time, matching the tube making speed, and cutting is performed online in real time.

[0026] (2) The laser sensing mechanism records the location of the defective holes, which facilitates the process improvement of the locations of frequently defective holes in the later stage. At the same time, the laser sensing mechanism can record the hole spacing and identify the situation where the hole spacing is unqualified.

[0027] (3) The clamping mechanism is used to straighten the tube during cutting, clamping it to maintain stability during cutting; the cutting mechanism is laser circumferential cutting, which has a good cutting effect; at the same time, the clamping mechanism and the cutting mechanism can move to improve the flexibility of use;

[0028] (4) The slag suction pipe sucks up the debris generated during the cutting process and supports the hole tube during the cutting process. After the cutting is completed, the slag suction pipe is continuously pushed out of the hole tube by the slag suction bracket along the slag suction guide rail. At this time, the anti-reverse limit mechanism ensures that the hole tube will not be taken away by the slag suction pipe. After the slag suction pipe is completely withdrawn from the hole tube, the receiving component completely catches the hole tube and slides the hole tube down from the receiving slide for storage.

[0029] (5) This invention eliminates the inefficient labor of transportation, storage space and manual fixed-length carts, and the real-time laser cutting of the tube rapidly improves production efficiency; the sensor counting combined with camera recognition provides real-time feedback and accurately ensures the cutting size. Attached Figure Description

[0030] Figure 1 This is a perspective view of the online laser cutting equipment for perforated tubes according to an embodiment of the present invention;

[0031] Figure 2This is a front view of the online laser cutting device for perforated tubes according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the perforated tube according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the online laser cutting method for perforated tubes according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the online laser cutting method for perforated tubes according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the online laser cutting method for perforated tubes according to an embodiment of the present invention.

[0036] Numbering on the map:

[0037] 1. Measuring mechanism; 2. Identification mechanism; 3. Laser sensing mechanism; 4. Clamping mechanism; 41. Clamping frame; 42. Clamping block mounting base; 5. Cutting mechanism; 51. Rotating platform; 52. Cutter; 6. Receiving and receiving mechanism; 61. Receiving assembly; 62. Slag suction assembly; 621. Slag suction pipe; 622. Slag suction bracket; 623. Slag suction guide rail; 7. Control box; 8. Hole pipe. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] The online laser cutting equipment for perforated tubes includes a worktable and a cutting box, and further includes a measuring mechanism 1, an identification mechanism 2, a laser sensing mechanism 3, a clamping mechanism 4, a cutting mechanism 5, and a receiving mechanism 6, which pass sequentially through the perforated tube 8. The measuring mechanism 1, the identification mechanism 2, and the laser sensing mechanism 3 are connected to the worktable, and the clamping mechanism 4, the cutting mechanism 5, and the receiving mechanism 6 are all movably connected to the cutting box along the axial direction of the perforated tube. The equipment also includes a control box 7, which is connected to the side of the cutting box and electrically connected to the measuring mechanism 1, the laser sensing mechanism 2, the identification mechanism 3, the clamping mechanism 4, the cutting mechanism 5, and the receiving mechanism 6.

[0041] In this embodiment, the cutting process will generate some debris and heat, so the clamping mechanism 4, the cutting mechanism 5, and the receiving mechanism 6 are set inside the box.

[0042] Specifically, in this embodiment, the online laser cutting equipment for perforated tubes and the front-end tube-making machine are arranged sequentially. A tube of a certain length obtained by the tube-making machine enters the laser cutting equipment for cutting to form a perforated tube, thus achieving simultaneous tube making and cutting. For example... Figure 3 As shown, the perforated tube 8 to be manufactured in this embodiment has a length of 307 mm, a blank length of 61.5 mm at both ends, and multiple rows of holes in the middle with a hole spacing of S1. The tube produced by the tube manufacturing machine is a multi-layered tube as shown in the figure. Figure 3 The sum of the holes shown is given, and a cutting allowance is left between multiple holes 8 to eliminate the error caused by cutting. That is, the distance between the last column of holes and the first column of holes of adjacent holes is 61.5*2+cutting allowance. The cutting allowance can be obtained according to actual experiments. Laser cutting has low loss and is usually 1mm.

[0043] In this embodiment, the measuring mechanism 1 is an encoder measuring mechanism. By rotating the rollers that press the pipe, the encoder is driven to measure and feed back the required cutting length to the control box 7. The control box 7 then controls the cutting mechanism 5 to perform the cutting. The recognition end of the identification mechanism 2 is a camera, which can be a pre-existing technology such as the MV-SC2016M vision sensor. It incorporates high-precision positioning and measurement algorithms to detect presence, orientation, position, and size. The laser sensing mechanism 3 records the location of defective holes, facilitating subsequent process improvements for frequently occurring defective holes. Simultaneously, the laser sensing mechanism 3 records the hole spacing, identifying instances of non-compliant hole spacing.

[0044] In this embodiment, two guide rails are installed on the bottom surface of the cutting box. The bottom of the clamping mechanism 4 can move along the guide rails in the axial direction of the tube 8. The movement can be achieved by a motor connected to a gear mounted on the clamping mechanism 4. The gear meshes with a rack mounted on the bottom surface of the cutting box. The motor drives the clamping mechanism 4 to move along the guide rails. The gear meshing method has self-locking properties and high adjustment accuracy, resulting in high positioning accuracy of the clamping mechanism 4. The clamping mechanism 4 includes a clamping frame 41 and a clamping block mounting seat 42. The bottom of the clamping frame 41 is slidably connected to the guide rails of the cutting box. The front side of the clamping frame 41 is also provided with a vertical guide rail. The clamping block mounting seat 42 is slidably connected to the vertical guide rails. There are two clamping blocks for clamping the tube 8. The two clamping blocks are connected to the rear end of the clamping block mounting seat 42 by a cylinder that drives the clamping blocks to move relative to each other. The cylinder is a double-headed cylinder that can simultaneously drive the two clamping blocks to move closer and further away, thereby achieving clamping of the tube 8. In this embodiment, the clamping is only for straightening, not for clamping. Since the tube 8 is being transported throughout the process, the clamping mechanism 4 is mainly used to stabilize the tube 8 during the cutting process and does not affect the normal transport of the tube 8.

[0045] The cutting mechanism 5 includes a rotating platform 51 and a cutter 52. The rotating platform 51 is connected to the front of the clamping block mounting base 42. The rotating platform 51 can use a motor, planetary gears, or other structures to drive the cutter 52 to rotate. The cutter 52 is connected to the rotating platform 51 and can rotate 360 ​​degrees. In this embodiment, the cutter 52 performs laser circumferential cutting. Laser cutting offers high quality, a small kerf, a narrow heat-affected zone, and a fast cutting speed that meets the requirements for non-stop cutting, resulting in high efficiency.

[0046] Because the cutting mechanism 5 is connected to the clamping block mounting base 42 of the clamping mechanism 4, it can move and adjust in both the horizontal and vertical directions.

[0047] The receiving mechanism 6 includes a receiving component 61, a receiving slide (not shown in the figure), and a slag suction component 62. The bottom of the receiving component 61 is slidably connected to the cutting box body along the axial direction of the perforated tube; that is, the receiving component 61 is also slidably connected to the guide rail on the bottom surface of the cutting box body. The top of the receiving component 61 includes an L-shaped groove, which can be moved up and down by means of a cylinder or other means for easy adjustment. The receiving slide is located on one side of the opening of the L-shaped groove of the receiving component 61. The receiving plate is inclined, and the perforated tube on the receiving component 61 can roll down the receiving slide into the receiving box. The receiving slide can be made movable and can be used when needed by installing rollers at the bottom.

[0048] The slag suction assembly 62 includes a slag suction pipe 621 that can move along the axial direction of the perforated pipe 8, a slag suction support 622, and a slag suction guide rail 623. During the cutting process of the perforated pipe 8, one end of the slag suction pipe 621 extends into the perforated pipe 8 to suck up the slag generated during the cutting process. The other end of the slag suction pipe 621 can be connected to a fan to provide negative pressure. The slag suction support 622 is connected to the other end of the slag suction pipe 621, and the slag suction support 622 is slidably connected to the slag suction guide rail 623.

[0049] The receiving mechanism 6 also includes a backstop mechanism for pushing the cut tube out of the suction tube 621. The bottom of the backstop mechanism is fixedly connected to the inside of the cutting box and is located between the receiving assembly 61 and the suction bracket 622. The suction tube 621 passes through the top of the backstop mechanism, and the tube 8 cannot pass through the backstop mechanism.

[0050] The slag suction pipe 621 sucks up the debris generated during the cutting process and supports the borehole tube during the cutting process. After the cutting is completed, the slag suction pipe 621 is continuously pushed out of the borehole tube by the slag suction bracket 622 moving horizontally along the slag suction guide rail 623. At this time, the anti-reverse limiting mechanism ensures that the borehole tube 8 will not be taken away by the slag suction pipe 621. After the slag suction pipe 621 is completely withdrawn from the borehole tube 8, the receiving component 61 completely catches the borehole tube and slides the borehole tube down from the receiving slide for storage.

[0051] In this embodiment, the measuring mechanism 1 is used to record the length of the perforated tube, and the identification mechanism 2 is used to identify unqualified perforated tubes. The identification mechanism 2 feeds back to the control box 7, which cuts off the unqualified part and removes the latter half of the unqualified part to distinguish between qualified and unqualified sections. This embodiment can identify the tube hole and hole spacing, and provide real-time feedback on the error caused by punching. The measuring mechanism 1 measures in real time to ensure cutting accuracy. The tube is cut while being made, matching the tube making speed, and cutting is performed online in real time.

[0052] Example 2:

[0053] like Figure 4 , Figure 5 , Figure 6 As shown, this embodiment also discloses a cutting method using the above-mentioned online laser cutting equipment for perforated tubes;

[0054] First, the parameters of the perforated tube 8 are pre-stored in the control box 7, including the total length L, hole spacing S1, distance between each row of holes and the end, and distance L between the blank sections at both ends of the perforated tube 8. 空1 and L 空2 .

[0055] During normal operation, the pipes are transported sequentially. The measuring mechanism 1 records the length of the perforated pipe 8 and feeds this length back to the control box 7 in real time. When the perforated pipe 8 reaches the preset length L, the control box 7 controls the clamping mechanism 4 to clamp the perforated pipe 8 and the cutting mechanism 5 to cut it. During the cutting process, the clamping mechanism 4 and the cutting mechanism 5 move on a rack driven by a motor-driven gear, driving the cutter 52 to move in the same direction as the perforated pipe 8. The moving speed matches the pipe-making speed to ensure that the cut is not skewed, thereby improving cutting accuracy. Simultaneously, during the horizontal movement of the cutter 52, it rotates 360° around the pipe to cut, ensuring that the cut size meets the material requirements. After cutting the product, the cutter 52 quickly rises, rotates 360° to return to the origin, the clamping mechanism 4 releases the pipe, and the servo walking mechanism drives the cutter 52 back to the initial position. During cutting, the slag suction pipe 621 extends into the perforated pipe 8 to suction slag. When the cutting is completed, because the pipe is constantly being transported, it can push the cut perforated pipe 8 to continue moving axially. At this time, the slag suction pipe 621 also moves in the same direction. When the slag suction pipe 621 moves at a high speed, it can be pulled out of the perforated pipe 8 due to the anti-reverse limiting mechanism. The perforated pipe 8 also falls onto the receiving component 61. The slag suction pipe 621 then extends into the next section of the perforated pipe 8.

[0056] It should be noted that there is a time difference between the signal sent by the measuring mechanism 1 to the control box 7 to control the cutter to lower the blade. Therefore, in the actual debugging process, the time of sending the cutting signal can be advanced to make up for the time difference in the movement of the cutter 52 to the lowering position. For example, according to the transport speed, the cutting time is the 10th second. However, since the cutter 52 needs to move for a short time to reach the lowering position, it can be set to start moving at the 9th second, and reach the predetermined lowering position at the 10th second.

[0057] The control box 7 stores the distance L1 between the identification mechanism 2 and the cutting position of the cutter 52, and the distance between the measuring mechanism 1 and the cutting position of the cutter 52 can be equal to the length L of the hole tube 8. The control box 7 also stores algorithms for identifying unqualified holes, such as non-circular holes. It should be noted that in this embodiment, qualified holes are circular holes, while unqualified holes can be deformed holes, such as those with defects like dents or stretching at the edge of a circular hole.

[0058] When the identification mechanism 2 identifies an unsuitable hole, it sends a non-compliance signal to the control box 7. The control box 7 then controls the measuring mechanism 1 to re-record the travel length. For example, in this embodiment, the length of the hole tube is 307mm. When an unsuitable hole is found, the measuring mechanism 1 resets its record to zero and restarts recording the length. Given that the distance between the identification mechanism 2 and the cutting position of the cutter 52 is L1, after traveling L1 (the aforementioned time difference also exists here. Therefore, during actual cutting, L1 - the time it takes for the cutter 52 to reach the cutting position × the transport speed can be used to compensate for the time difference in the transport of the cutter 52 to the cutting position. This problem can be resolved by debugging during the actual cutting process), the control box 7 controls the cutter 52 to cut. At the same time, the measuring mechanism 1 re-records the length. After the difference between the travel length L of the hole tube 8 and L1 is reached, the cutter 52 cuts again.

[0059] In other words, if a section of perforated tube 8 has a defective hole at a certain point in its middle, then the perforated tube 8 will be cut into two sections at the defective point, and the qualified perforated tube 8 will be a complete perforated tube of length L. Cutting at the defective point can distinguish between qualified and unqualified products, i.e., the complete perforated tube is a qualified product, and the incomplete product is an unqualified product; it can also allow for the manual discovery of the location of the unqualified product.

[0060] If multiple defective holes are found in a certain section, it has no impact on finding only one defective hole. You only need to cut at the point where the defective hole is first found.

[0061] In this embodiment, the laser sensing mechanism 3 has two functions. First, when the camera detects a defective hole, it records the number of the column where the hole is located in the control box, which facilitates the process improvement of the location of frequently defective holes in the later stage. Second, the laser sensing mechanism 3 can record the hole spacing and identify the situation where the hole spacing is unqualified.

[0062] Specifically, the relative position between the laser sensing mechanism 3 and the identification mechanism 2 is stored in the control box 7. When the identification mechanism 2 identifies a defective hole, the control box 7 controls the laser sensing mechanism 3 to record the number of rows of the hole. The difference between the number of rows recorded by the laser sensing mechanism 3 and the relative position is used to obtain the number of rows where the defective hole is located.

[0063] When the hole spacing is normal (uniformly distributed), the laser sensing mechanism 3 can obtain a hole position signal in equal time, thereby recording the number of holes. When the laser sensing mechanism is located in the blank section at both ends of the hole tube 8, there will be no hole position signal for a longer period of time, thereby determining that the laser sensor mechanism 3 is located in the blank area at both ends.

[0064] For example, in this embodiment, the relative positions of the identification mechanism 2 and the laser sensing mechanism 3 are separated by 3 apertures, such as... Figure 5As shown, in this embodiment, the total number of rows of holes is sixteen. If the defective hole occurs in the fifth row (from the right), and the laser sensing mechanism 3 is located in the second row of holes, during the movement, the laser sensing mechanism 3 can record a total of fourteen rows of holes after identifying the defective hole (excluding the hole at the time of identification). The total number of rows - the number of rows recorded + the relative position can be used to determine the row number of the identified defective hole, which is recorded in the control box 7. This facilitates the improvement of the front-end tube manufacturing process later. For example, if it is found that the defective hole always occurs in the fifth row, then check whether the tool of the tube manufacturing machine punching the fifth row of holes is damaged or deformed.

[0065] The laser sensor 3 records the number of rows and the spacing between holes. When the spacing between holes is found to be different from the preset value, the control box 7 controls the measuring mechanism 1 to re-record the travel length. When the travel reaches the distance L3 between the standard position of the row of holes and the end, the cutter 52 performs cutting. At the same time, the measuring mechanism 1 re-records the travel length. When the travel reaches the difference between the preset length of the hole tube and L3 again, the cutter 52 performs cutting.

[0066] like Figure 6 As shown, assuming that the positions of the holes in the second column (starting from the right) have all shifted, and the actual position is to the left of the standard position, then the time for the laser sensing mechanism to detect the holes has changed. Therefore, based on the change in the time recorded by the laser sensing mechanism 3 for the hole column, it is determined that the hole column has shifted. The control box 7 determines which column of holes has shifted based on the hole position recorded by the laser sensing mechanism 3. For example, if the laser sensing mechanism 3 only detects one column of normal hole position signals, it means that the hole position has shifted in the second column. If the laser sensing mechanism detects five columns of normal hole position signals, it means that the hole position has shifted in the sixth column.

[0067] The cutting location is determined based on the relevant parameters (distance between each row of holes and the end) stored in the control box 7. Specifically, if the hole length is 307mm and the second row of holes is offset, the distance between the second row of holes and the end recorded in the control box 7 is 72.5mm. The control measuring mechanism 1 re-records the travel length. When the distance between the standard position of the row of holes and the end is L3 = 72.5mm, the cutting mechanism performs the cutting, and the measuring mechanism re-records the travel length. When the travel length is 307-72.5 = 234.5mm, the cutting mechanism cuts again.

[0068] If any hole displacement is found within a section of the tube 8, the tube will be cut.

[0069] This embodiment eliminates the inefficient labor of transfer, storage space, and manual fixed-length carts. Real-time laser cutting of the tube rapidly improves production efficiency. Sensor counting combined with camera recognition provides real-time feedback, ensuring precise cutting dimensions.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cutting method for an online laser cutting device for perforated tubes, characterized in that, The tube is cut using an online laser cutting device, which includes a worktable, a cutting box, and a measuring mechanism, an identification mechanism, a clamping mechanism, a cutting mechanism, and a receiving mechanism that pass sequentially through the tube. The measuring mechanism and the identification mechanism are connected to the worktable, and the clamping mechanism, the cutting mechanism, and the receiving mechanism are all movable along the axial direction of the tube and connected to the cutting box. A control box is also included, which is connected to the side of the cutting box and electrically connected to the measuring mechanism, the identification mechanism, the clamping mechanism, the cutting mechanism, and the receiving mechanism. During normal operation, the measuring mechanism records the length of the tube and feeds the length back to the control box. When the tube is transported to the preset length, the control box controls the clamping mechanism to clamp the tube, the cutting mechanism to cut the tube, and the receiving mechanism to receive the cut tube. The distance between the identification mechanism and the cutting mechanism is L1. When the identification mechanism identifies an unsuitable hole, the control box controls the measuring mechanism to re-record the travel length. After traveling L1, the control box controls the cutting mechanism to cut, and the measuring mechanism re-records the length. When the difference between the preset length L and L1 of the traveled hole tube is reached, the cutting mechanism cuts again.

2. The online laser cutting method for perforated tubes according to claim 1, characterized in that, It also includes a laser sensing mechanism, which is connected to the worktable and located between the identification mechanism and the clamping mechanism, and is connected to the control box.

3. The online laser cutting method for perforated tubes according to claim 1, characterized in that, The measuring mechanism is an encoder measuring mechanism, and the recognition end of the recognition mechanism is a camera.

4. The online laser cutting method for perforated tubes according to claim 1, characterized in that, The bottom of the clamping mechanism is movably connected to the cutting box along the axial direction of the tube. The cutting mechanism includes a rotating platform and a cutter. The cutter is connected to the rotating platform, and the rotating platform is connected to the side of the clamping mechanism.

5. The online laser cutting method for perforated tubes according to claim 1, characterized in that, The receiving mechanism includes a receiving component and a receiving slide. The bottom of the receiving component is movably connected to the cutting box along the axial direction of the tube. The receiving slide is located on one side of the receiving component.

6. The online laser cutting method for perforated tubes according to claim 5, characterized in that, The receiving mechanism also includes a slag suction assembly, which includes a slag suction pipe, a slag suction bracket, and a slag suction guide rail that can move along the axial direction of the perforated pipe. During the cutting process of the perforated pipe, one end of the slag suction pipe extends into the perforated pipe; the slag suction bracket is connected to the other end of the slag suction pipe, and the slag suction bracket is slidably connected to the slag suction guide rail.

7. The online laser cutting method for perforated tubes according to claim 6, characterized in that, The receiving mechanism also includes a backstop mechanism for pushing the cut tube out of the suction tube after cutting. The backstop mechanism is connected inside the cutting box and is located between the receiving assembly and the suction support. The suction tube passes through the top of the backstop mechanism.

8. The online laser cutting method for perforated tubes according to claim 1, characterized in that, It also includes a laser sensing mechanism, which is connected to the worktable and located between the identification mechanism and the clamping mechanism, and is connected to the control box; The control box stores the relative position between the laser sensing mechanism and the recognition mechanism. When the recognition mechanism detects a defective hole, the control box controls the laser sensing mechanism to record the number of rows of holes. The difference between the recorded number of rows and the relative position is used to obtain the number of rows where the defective hole is located.

9. The online laser cutting method for perforated tubes according to claim 8, characterized in that, The laser sensing mechanism records the number of rows and the spacing between holes. When the spacing between holes is found to be different from the preset value, the control box controls the measuring mechanism to re-record the travel length. When the travel reaches the distance L3 between the standard position of the row of holes and the end, the cutting mechanism performs cutting. At the same time, the measuring mechanism re-records the travel length. When the travel reaches the difference between the preset length of the hole tube and L3 again, the cutting mechanism performs cutting.

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