A laser cutting device and method for polyethylene pipe

Abstract

The application relates to the field of laser cutting, in particular to a laser cutting device and method for polyethylene pipes, which comprises a base and a laser cutting head, the laser cutting head is limited on the base through a sliding connecting frame, and a conveying part for conveying the polyethylene pipe is further connected on the base; in the process of driving the clamping plate on the sliding block and the rotating ring to clamp and limit the pipe, the sliding block, the limiting frame and the rotating ring drive the clamped pipe to be conveyed forward, and meanwhile, rotation adjustment can be carried out; in the process, the sliding connecting frame and the laser cutting head are driven to slide and convey forward synchronously through the adjusting screw, the effect that the pipe is conveyed and cut at the same time is realized; after the cutting of a certain section of the pipe is completed, the conveying belt continues to drive the clamping end and the pipe to be conveyed forward, the rotating ring and the laser cutting head are moved back through the reverse rotation of the adjusting screw, and so on, so that the continuous cutting of the pipe is realized.

Description

Technical Field

[0001] This invention relates to the field of laser cutting, and in particular to a laser cutting apparatus and method for polyethylene pipes. Background Technology

[0002] Polyethylene (PE) pipes are widely used in municipal engineering, building water supply and drainage, gas transmission and other fields due to their excellent corrosion resistance, wear resistance and flexibility. Due to geographical location and other conditions, it is necessary to adjust the transmission path of a certain section of the pipeline to avoid the influence of geographical location. In this process, the pipe needs to be cut. For small diameter pipes, manual cutting can usually be used. However, for larger diameter pipes, manual cutting can easily lead to unevenness of the cut surface.

[0003] With the advancement of technology, technicians in related fields have optimized the technical means for cutting polyethylene pipes. For a more accurate comparison, Chinese Patent No. CN115582875A discloses a pipe cutting device for polyethylene pipes, including a cutting frame, a rotating frame, a pressing device, a guide frame, a base surface, and a positioning device. In use, the pressing device and the detachable shim cooperate to change the single-point contact between the pressing device and the PE pipe to multi-point contact, thereby stably fixing the PE on the positioning device. Then, the cutting frame is started and slowly lowered to cut the PE pipe. This effectively solves the problem of existing pipe cutting devices, which cannot complete the pipe cutting in one go because the cutting component and the positioning component are in the same vertical plane, resulting in poor cutting accuracy and low cutting efficiency.

[0004] However, the following problems still exist when using the above-mentioned existing technology to cut polyethylene pipes:

[0005] The aforementioned device uses the cooperation between the pressure device and the detachable shim block to fix the PE pipe before activating the drive device to drive the band saw blade drive wheel and the band saw blade. Then, through the cooperation between the band saw blade and the band saw blade guide, the saw teeth of the band saw blade can be aligned with the base surface. In actual use, because the aforementioned device needs to fix the PE pipe before cutting, the entire cutting frame is only allowed to slide and adjust in the vertical direction. That is, during the cutting process of the PE pipe, the entire PE pipe will stop at the pressure device and will not continue to be conveyed forward. When the length of the pipe to be processed is long and multiple cutting tasks are required, it is necessary to wait for the completion of the previous cutting task before continuing to convey the pipe forward for the next cutting task. This action is repeated repeatedly. In other words, during the cutting process of the same pipe, it is always necessary to stop for a period of time to convey or cut the pipe forward. The efficiency is low when cutting long pipes.

[0006] Therefore, based on the above-stated viewpoints, there is still room for optimization in the existing technology for cutting polyethylene pipes. Summary of the Invention

[0007] To address the aforementioned problems, the present invention provides a laser cutting device for polyethylene pipes, comprising a base and a laser cutting head. The laser cutting head is positioned on the base via a sliding bracket. A conveying component for conveying the polyethylene pipe is also connected to the base. The conveying component includes:

[0008] Install the base frame, with the horizontal limit on the base.

[0009] The conveyor rollers are arranged symmetrically on both sides of the mounting base. The conveyor rollers on the same side of the mounting base are connected to a conveyor belt. The two conveyor belts are connected to a number of sliding clamping ends on opposite sides of the mounting base. The clamping ends are driven by the conveyor belt to rotate and slide to clamp and convey the pipe.

[0010] The telescopic support frame has a U-shaped structure. Its two vertical telescopic sections are limited to the mounting base frame. An adjusting screw is installed on the horizontal section of the telescopic support frame. The sliding connecting frame is threaded onto the adjusting screw, and a limiting slide bar that limits the sliding on the telescopic support frame is connected to the sliding connecting frame.

[0011] Preferably, the sliding frame is further connected to an installation frame, on which a number of rollers are evenly arranged.

[0012] Preferably, the clamping end includes several sliding blocks that are connected between the two conveyor belts. Two clamping plates are symmetrically sliding and limiting on the same sliding block. Driven guide rods are symmetrically connected to the opposite ends of the two clamping plates. A guide slide is also symmetrically limiting on the mounting base for guiding and limiting the sliding path of the several driven guide rods.

[0013] Preferably, a return spring located on the slide block is connected between two clamping plates on the same sliding block.

[0014] Preferably, the end of the adjusting screw away from the mounting base is also threaded with a limiting frame, and a rotating ring is threaded through the upper limit of the limiting frame. Several clamping screws are arranged circumferentially on the rotating ring, and a driven gear is threaded on the clamping screw and located on the rotating ring. All clamping screws are connected to clamping arc plates at their opposite ends.

[0015] Preferably, the driven gears mesh together with a drive gear ring located within the rotating ring, and a limiting rod is connected to the drive gear ring and is provided on the rotating ring and the limiting frame.

[0016] Preferably, all the rotating rings are circumferentially provided with a number of teeth and keys, and a drive gear cylinder is rotatably connected to the base corresponding to the rotating rings and the number of teeth and keys thereon, so as to guide the rotating rings to slide and drive the rotating rings to rotate.

[0017] Preferably, the limiting rod is fitted with a driven slider that is limited to the limiting frame, and the limiting rod is fitted with a compression spring located between the limiting frame and the driven slider.

[0018] Preferably, a connecting shaft is provided in the middle of the drive gear cylinder, which is located on the telescopic section of the telescopic support. The rotation of the connecting shaft is limited to the base. The connecting shaft and the adjusting screw are connected by a synchronous belt drive.

[0019] Furthermore, the present invention also provides a laser cutting method for polyethylene pipes, comprising the following steps:

[0020] S1: Place the polyethylene pipe to be processed on the mounting base, clamp and limit the pipe through the clamping end, and then drive the clamping end and the clamped pipe to be conveyed forward synchronously by the rotation of the conveying rollers and conveyor belt on the mounting base.

[0021] S2: While clamping the pipe at the clamping end, the other end of the pipe is limited by the limiting frame and the rotating ring. At the same time, the rotating ring and the pipe clamped by it are rotated and adjusted. Then, the limiting frame, the rotating ring, the sliding frame and the laser cutting head are synchronously conveyed forward by rotating the adjusting screw.

[0022] S3: After the pipe is cut, the conveyor belt continues to drive the clamping end and the pipe forward, while the rotating ring and laser cutting head move back by adjusting the screw in the opposite direction. This process is repeated to achieve continuous cutting of the pipe.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] I. This invention utilizes the interplay between a conveyor belt, several sliding blocks, clamping plates, a rotating ring, a limiting frame, and an adjusting screw. During the clamping and limiting process of the pipe by the clamping plates and rotating ring on the sliding blocks, the pipe is simultaneously conveyed forward by the sliding blocks, the limiting frame, and the rotating ring, while also being rotated for easy cutting by the laser cutting head. Furthermore, the adjusting screw drives the sliding frame and laser cutting head forward synchronously, achieving simultaneous pipe conveying and cutting. After cutting a section of the pipe, the conveyor belt continues to convey the clamping end and the pipe forward, while the rotating ring and laser cutting head move back by the reverse rotation of the adjusting screw. This process repeats continuously, enabling continuous pipe cutting.

[0025] Second, by adjusting the angle of the entire mounting base relative to the horizontal plane, this invention allows the unrestricted section of the pipe to tilt accordingly with the tilt of the entire mounting base during the cutting process, until it approaches the ground. This effectively avoids the additional stress caused by the unrestricted section of the pipe being suspended too high. By conveying the pipe forward, this invention avoids the traditional method of limiting and driving from the end of the pipe, and also effectively shortens the overall length of the device, reducing the footprint. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the conveying component of the present invention.

[0029] Figure 3 This is a schematic diagram of the clamping end of the present invention.

[0030] Figure 4 This is a schematic diagram of the conveyor belt structure of the present invention.

[0031] Figure 5 This is a schematic diagram of the structure of the reset spring of the present invention.

[0032] Figure 6 This is a schematic diagram of the structure of the drive gear cylinder of the present invention.

[0033] Figure 7 This is a schematic diagram of the rotating ring structure of the present invention.

[0034] Figure 8 This is the present invention. Figure 7 A magnified view of A in the middle.

[0035] Figure 9 This is a schematic diagram of the limiting rod structure of the present invention.

[0036] Figure 10 This is a schematic diagram of the arc-shaped groove of the present invention.

[0037] In the diagram, 1 is the base; 10 is the laser cutting head; 11 is the sliding frame; 2 is the conveyor component; 20 is the mounting base; 21 is the conveyor roller; 210 is the conveyor belt; 211 is the drive shaft; 22 is the clamping end; 220 is the sliding block; 221 is the clamping plate; 222 is the driven guide rod; 223 is the guide slide; 224 is the return spring; 23 is the telescopic support; 230 is the adjusting screw; 231 is the limit slide bar; 24 is the mounting frame; and 240 is the... 25. Roller; 25. Limiting frame; 250. Rotating ring; 251. Clamping screw; 252. Driven gear; 253. Clamping arc plate; 254. Drive gear ring; 255. Limiting through rod; 256. Gear key; 257. Drive gear cylinder; 258. Connecting shaft; 26. Driven slider; 260. Compression spring; 261. Clearance groove; 27. Mounting support plate; 270. Adjusting shaft; 271. Arc groove; 272. Telescopic cylinder. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1 To be continued Figure 10 The embodiments of the present invention will be described in detail below.

[0039] This application discloses a laser cutting device and method for polyethylene pipes. This application is mainly used in the process of cutting polyethylene pipes, achieving the effect of laser cutting. Specifically, during the cutting process, the cooperation between the conveyor belt, sliding block, clamping plate, rotating ring, and driving gear cylinder enables the pipe to be conveyed forward while the laser cutting head cuts the pipe. Furthermore, this application can adjust the overall tilt angle of the mounting base relative to the horizontal plane to avoid additional stress caused by the unclamped end of the pipe being suspended.

[0040] Example 1: Refer to Figure 1 As shown, a laser cutting device for polyethylene pipes includes a base 1 and a laser cutting head 10. The laser cutting head 10 is slidably limited on the base 1 via a sliding bracket 11. A conveying component 2 for conveying the polyethylene pipe is also connected to the base 1. In use, while the conveying component 2 clamps and limits the polyethylene pipe, it also drives the clamped pipe to continue forward and drives the laser cutting head 10 to slide and adjust synchronously, achieving the effect of simultaneously driving the pipe forward and cutting the pipe.

[0041] Reference Figures 2 to 4 As shown, this is the conveyor 2 used for conveying and limiting the pipe to be processed; specifically, the conveyor 2 includes:

[0042] Mounting base 20 is horizontally limited on base 1 and used for support and limitation.

[0043] A number of conveyor rollers 21 are symmetrically distributed on both sides of the mounting base 20. The conveyor rollers 21 on the same side of the mounting base 20 are connected to a conveyor belt 210. A number of sliding clamping ends 22 that are limited to the mounting base 20 are provided between the opposite sides of the two conveyor belts 210. The clamping ends 22 are driven by the conveyor belts 210 to rotate and slide to clamp and convey the pipe. The two conveyor rollers 21 on the same axis on both sides of the mounting base 20 are connected to a drive shaft 211 that rotates through the mounting base 20. One of the drive shafts 211 is externally connected to a drive end, which is generally existing motor technology, to drive the drive shaft 211, the conveyor rollers 21 and the conveyor belt 210 to rotate synchronously and drive the clamping ends 22 to rotate and slide to convey the pipe.

[0044] The telescopic support 23 has a U-shaped structure, with its two vertical telescopic sections limited to the mounting base 20. A drive cylinder is provided on the mounting base 20 corresponding to the telescopic support 23. The telescopic section of the drive cylinder is connected to the telescopic section of the telescopic support 23 to drive the telescopic support 23 to slide and adjust in the vertical direction. An adjusting screw 230 is provided on the horizontal section of the telescopic support 23. The sliding connecting frame 11 is threaded onto the adjusting screw 230. A limiting slide bar 231 that limits the sliding on the telescopic support 23 is connected to the sliding connecting frame 11.

[0045] In use, after clamping and limiting the pipe by clamping end 22, the conveyor roller 21 and conveyor belt 210 are driven to rotate synchronously. The rotating conveyor belt 210 drives several clamping ends 22 at their upper limit to slide synchronously. During the sliding process of the clamping end 22, the pipe clamped by it is driven to be conveyed forward. At the same time, by adjusting the rotation of the screw 230, the sliding frame 11 and the laser cutting head 10 are driven to slide synchronously, thereby achieving the effect of driving the pipe forward while cutting the pipe.

[0046] Furthermore, referring to Figure 2 and Figure 3As shown, to improve the stability when limiting the pipe, a mounting frame 24 is also connected to the sliding frame 11. Several rollers 240 are rotatably connected to the mounting frame 24, and several balls are evenly distributed on the mounting frame 24 along the conveying direction of the conveyor belt 210. In use, the mounting frame 24 and the rollers 240 are driven to slide, so that the rollers 240 abut against the clamped pipe. Through the double abutment of the rollers 240 and the clamping end 22, the stability of the pipe when it is limited is further improved. Since the rollers 240 are rotatably limited on the mounting frame 24, during the process of the pipe being driven forward, the friction between the pipe and the rollers 240 also drives the rollers 240 to rotate, so that the pipe can be conveyed forward. Through the cooperation between the mounting frame 24, the rollers 240 and the clamping end 22, the stability of the pipe clamping is improved, the frictional resistance of the pipe being conveyed forward is reduced, and the efficiency of pipe cutting is improved.

[0047] Reference Figures 2 to 5 As shown, the clamping end 22 is used to clamp and limit the pipe to be processed. Specifically, the clamping end 22 includes several sliding blocks 220 connected between the two conveyor belts 210. Two clamping plates 221 are symmetrically slid and limited on the same sliding block 220. Driven guide rods 222 are symmetrically connected to the opposite ends of the two clamping plates 221. Guide slides 223 are also symmetrically limited on the mounting base 20 for guiding and limiting the sliding path of the driven guide rods 222. The guide slides 223 have a middle vertical section parallel to the conveying direction of the conveyor belt 210, and the two ends of the vertical section are symmetrically provided with inclined sections that deflect away from the middle sliding block 220.

[0048] In use, when the conveyor belt 210 is driven to rotate and move the sliding block 220, once the sliding block 220 moves the clamping plate 221 and the driven guide rod 222 to the guide slide 223, the driven guide rod 222 drives the connected clamping plate 221 to slide closer to the pipe along the inclined section of one end of the guide slide 223. That is, the two clamping plates 221 on the same sliding block 220 are guided to slide relative to each other by the two guide slides 223 to clamp and limit the pipe. As the driven guide rod 222 slides along the vertical section of the guide slide 223, the two clamping plates 221 are always driven and limited to press against both sides of the pipe, driving the pipe forward to achieve the effect of conveying and cutting the pipe. After the driven guide rod 222 is driven to slide from the vertical section of the guide slide 223 to the inclined section at the other end, the driven guide rod 222 is no longer limited by the vertical section of the guide slide 223, and the clamping force on the pipe is weakened so that the cut pipe can be released from the two clamping plates.

[0049] Furthermore, in order to adaptively tighten and limit the pipes according to different specifications, the clamping end 22 also includes a connecting slide rod symmetrically connected to the opposite sides of two guide slides 223. A bent slide rod connected to the mounting base 20 is slidably sleeved on the connecting slide rod. A driven inclined block that slides out of the bent slide rod is provided on the connecting slide rod. A return spring 224 located on the bent slide rod is connected between the horizontal sections of the connecting slide rod and the bent slide rod. An abutment rod is provided on the telescopic section of the telescopic support 23 corresponding to the driven inclined block.

[0050] Reference Figure 5 As shown, to facilitate the detachment of the cut pipe, a return spring 224 located on the slide block 220 is connected between the two clamping plates 221 on the same slide block 220. In use, when the slide block 220 and the driven guide rod 222 slide to the inclined section at the front end of the conveyor belt 210 of the guide slide 223, the two driven guide rods 222 drive the two connected clamping plates 221 to slide relative to each other along the abutting inclined surface to clamp the pipe and compress the return spring 224 between the two clamping plates 221. When the slide block 220 and the driven guide rod 222 slide to another inclined section of the same guide slide 223, the compressed return spring 224 needs to be reset to its normal extended state, driving the two connected clamping plates and the driven guide rod 222 to slide away from each other, disengaging from the pipe and allowing the cut pipe to be removed.

[0051] Reference Figures 6 to 8 As shown, the end of the adjusting screw 230 away from the mounting base 20 is also threaded with a limiting frame 25. The upper limit of the limiting frame 25 is provided with a rotating ring 250. The rotating ring 250 is circumferentially provided with a number of clamping screws 251. The clamping screws 251 are threaded with driven gears 252 located on the rotating ring 250. The opposite ends of all the clamping screws 251 are connected to clamping arc plates 253.

[0052] In use, the driven gear 252 is driven to rotate. The threaded engagement between the clamping screw 251 and the driven gear 252 drives the clamping screw 251 to slide and adjust. The sliding of the clamping screw 251 drives the connected clamping arc plate 253 to slide and adjust simultaneously, so that several clamping arc plates 253 are all against the pipe or disengaged from the pipe, thereby completing the further clamping and limiting effect on the pipe.

[0053] As an optional implementation, to increase the friction between the clamping arc plate 253 and the pipe, a rubber pad is connected to the end of the clamping arc plate 253 away from the connected clamping screw 251. In use, as the clamping arc plate 253 slides, it causes the connected rubber pad to simultaneously abut against the pipe. Due to the elasticity and texture of the rubber pad, the contact area with the pipe is significantly increased, thereby increasing the friction between them and facilitating the synchronous sliding of the pipe.

[0054] Reference Figures 6 to 9 As shown, in order to synchronously drive all the clamping screws 251 on the rotating ring 250 to slide and adjust synchronously, so as to achieve the self-centering and limiting effect of the pipe, all driven gears 252 mesh together with the drive gear ring 254 located within the rotating ring 250. During use, the drive gear ring 254 and the driven gear 252 are driven to slide relative to each other. Because the driven gear 252 and the drive gear ring 254 mesh with each other, the driven gear 252 after relative sliding... Driven by the drive gear ring 254, the gear rotates around the connected clamping screw 251. The driven gear 252 is rotatably connected to the rotating ring 250, and the clamping screw 251 is threaded through the driven gear 252. After rotation, the driven gear 252 drives the clamping screw 251 to slide and adjust through the thread on the clamping screw 251, thereby enabling all the clamping arc plates 253 to move synchronously towards or away from the pipe, achieving a self-centering and limiting effect on the pipe.

[0055] Since it is also necessary to drive the rotating ring 250 and several abutting arc plates 253 and abutting screws 251 that are pressed against the pipe to drive the pipe to rotate synchronously, a limiting rod 255 that is limited and passes through the rotating ring 250 and the limiting frame 25 is connected to the driving gear ring 254. Specifically, the limiting rod 255 slides out of the rotating ring 250 and connects to the limiting frame 25, and a limiting groove is formed on the rotating ring 250 corresponding to the limiting rod 255 that also passes through. In use, the rotating ring 250 is driven to rotate as a whole, while the drive gear ring 254 is limited on the limiting frame 25 by the limiting rod 255. The drive gear ring 254 and the limiting rod 255 remain stationary during the rotation of the rotating ring 250, thereby achieving relative positional sliding with all driven gears 252 on the rotating ring 250, thus driving the driven gears 252 to rotate and adjusting the sliding of the clamping screw 251 and the clamping arc plate 253.

[0056] Furthermore, refer to Figures 6 to 9As shown, in order to drive the rotating ring 250 to rotate, the rotating ring 250 is evenly provided with a number of teeth 256 in the circumferential direction. On the base 1, a drive gear cylinder 257 is rotatably connected to the rotating ring 250 and the number of teeth 256 thereon, so as to guide the rotating ring 250 to slide and drive the rotating ring 250 to rotate.

[0057] In use, the drive gear cylinder 257 is driven to rotate, which in turn drives several key teeth meshing with it to rotate and slide, thereby driving the rotating ring 250 to rotate synchronously. During this process, the adjusting screw 230 also drives the limiting frame 25 and the rotating ring 250 to slide axially along the adjusting screw 230, driving the pipe forward and driving the pipe to rotate at the same time so as to achieve the effect of simultaneously conveying and cutting the pipe, which greatly improves the processing efficiency of cutting the same pipe.

[0058] Furthermore, referring to Figures 6 to 9 As shown, considering that the sliding adjustment effect of the clamping screw 251 and the clamping arc plate 253 is achieved by the meshing between the drive gear ring 254 and several driven gears 252, after the clamping screws 251 and the clamping arc plate 253 are held against the pipe, if it is necessary to continue to drive the rotating ring 250 to rotate so that the drive gear and the driven gear 252 can slide relative to each other, the clamping arc plate 253 and the clamping screw 251 held against the pipe will generate a reaction force to restrict the rotation of the driven gear 252 due to the restriction of the pipe. This restricts the continued relative sliding between the driven gear 252 and the drive gear ring 254, that is, restricts the continued rotation of the rotating ring 250, so that it can no longer drive the pipe to rotate.

[0059] Therefore, in order to avoid the above problems, a driven slider 26 that slides and limits on the limiting frame 25 is sleeved on the limiting rod 255, and a compression spring 260 located between the limiting frame 25 and the driven slider 26 is sleeved on the limiting rod 255. At the same time, a relief groove 261 is formed in the rotating ring 250 to drive the ring to slide axially.

[0060] In the initial state, the compression spring 260 is in a compressed state to provide the driven slider 26, the limiting rod 255 and the drive gear ring 254 with a tendency to slide towards the driven gear 252, while the driven slider 26 is restricted by the limiting frame 25 to maintain the normal meshing transmission state of the drive gear ring 254 and all driven gears 252 in the initial state.

[0061] After all the clamping screws 251 and clamping arc plates 253 are pressed against the pipe, the rotating ring 250 is driven by a force that also drives several driven gears 252 to slide relative to the driving gear ring 254. This force drives the driven gears 252 to rotate about the connected clamping screws 251. At this time, due to the reaction force of the pipe on the clamping screws 251, the rotational force of the driven gears 252 is converted into a tangential force and applied to the contacting teeth on the driving gear ring 254. Since the hypotenuse of the teeth is approximately a triangular structure... The drive gear ring 254 is axially limited by the limiting rod 252, the driven slider 26, and the compression spring 260. The rotational force of the driven gear 252 is converted into a tangential force that squeezes the inclined edge of the contact key on the drive gear ring 254. The drive gear ring 254 slides axially along the avoidance groove 261 and disengages from the driven gear 252. That is, the drive gear ring 254, the driven slider 26, and the limiting rod 255 tend to slide further away from the driven gear 252, and the compression spring 260 is further compressed, thereby achieving the avoidance effect of the drive gear ring 254 on the driven gear 252.

[0062] During the rotation and sliding process of the driven gear 252 driven by the rotating ring 250, and when all the clamping screws 251 and clamping arc plates 253 on the rotating ring 250 jointly abut against the pipe and drive the pipe to rotate, the driven gear 252 is always subjected to the reaction force of the pipe on the clamping screws 251, so as to drive the drive gear ring 254 to disengage from it and form a clearance effect.

[0063] Reference Figure 2 and Figure 6 As shown, a connecting shaft 258 is provided in the middle of the drive gear cylinder 257 and is located on the telescopic section of the telescopic support frame 23. The connecting shaft 258 is located on the base 1 through the mounting side plate of the telescopic structure. The connecting shaft 258 is rotatably connected to the telescopic section of the mounting side plate. As an optional embodiment, the connecting shaft 258 and the adjusting screw 230 are connected by a synchronous belt drive.

[0064] In use, the rotating shaft 258 drives the drive gear cylinder 257 to rotate, which in turn drives the rotating ring 250 to rotate the clamped pipe. At the same time, the rotating shaft 258 also drives the adjusting screw 230 to rotate synchronously via the synchronous belt drive. Thus, while driving the rotating ring 250 to rotate the pipe, it also drives the limiting frame 25, the rotating ring 250 and the pipe to be conveyed forward, effectively improving the efficiency of pipe cutting.

[0065] After one section of the pipe is cut, the connecting shaft 258 is driven to rotate in the opposite direction. At this time, the drive gear cylinder 257 and the rotating ring 250 are driven to rotate in the opposite direction, so that the several clamping screws 251 and clamping arc plates 253 on the rotating ring 250 are disengaged from the pipe and slide away from the mounting base 20.

[0066] During this process, the conveyor belt 210 continues to rotate in the forward direction, and through the cooperation between the sliding block 220, clamping plate 221, driven guide rod 222 and guide slide 223, it continues to clamp and transport the pipe forward. After the rotating ring 250, limiting frame 25, sliding bracket 11 and laser cutting head 10 move back to the next cutting section of the pipe, the connecting shaft 258 continues to rotate in the forward direction, so that the several clamping screws 251 and clamping arc plates 253 on the rotating ring 250 clamp the pipe again, and drive the pipe to be transported forward and rotated. By repeating this process, the pipe can be continuously transported and the cutting task can be completed, which greatly improves the efficiency of cutting the same pipe.

[0067] It should be noted that after the pipe cutting process is completed, the conveyor belt 210 will continue to drive the sliding block 220 and other components to continue to transport the pipe forward. However, the return movement of components such as the rotating ring 250, the limiting frame 25, and the laser cutting head 10 requires a certain distance and time. This may cause the initial position of the laser cutting head 10 and the rotating ring 250 relative to the pipe cutting point and the mounting frame 24 to change. Therefore, as an optional implementation, after the pipe cutting task is completed, the overall forward conveying speed of the conveyor belt 210 can be reduced. After the laser cutting head 10 and other components return, the operating speed of the conveyor belt 210 and the conveying roller 21 can be restored to keep the stride of the rotating ring 250 and the clamping plate 221 driving the pipe to slide and adjust the same.

[0068] In another feasible implementation, when the laser cutting head 10 cuts the pipe, it is only necessary to drive the pipe to rotate one revolution relative to the laser cutting head 10 to completely cut the pipe. After the pipe is completely cut, its predetermined cutting length may still be driven forward by several clamping screws 251 and clamping arc plates 253 on the rotating ring 250 and the conveyor belt 210. That is, the cutting rate of the laser cutting head 10 on the pipe will be greater than the forward conveying rate of the pipe. In this case, the forward movement of the laser cutting head 10 on the pipe is less than the predetermined cutting and forward conveying length of the pipe. After the laser cutting head 10 completes the cutting of the pipe, it can drive the laser cutting head 10 and the rotating ring 250 to return to their original positions.

[0069] Example 2: Existing laser tube cutting devices, in order to be suitable for cutting longer tubes, typically require a long slide table. The clamping end 22 and the laser cutting head 10 are distributed at both ends of the slide table. The clamping end 22 clamps and limits one end of the tube, and then the tube is slid along the slide table to be adjusted to the laser cutting head 10 for cutting. In use, this typically requires a large space to accommodate the tube length and limit its movement. Therefore, referring to… Figure 10 As shown, based on Embodiment 1, in order to avoid the problem that conventional laser cutting devices require a large space, one of the transmission shafts 211 on the mounting base 20, which is away from the rotating ring 250, extends to both ends and rotates through the base 1. A mounting support plate 27 corresponding to the inner wall of the base 1 is connected to the lower side of the mounting side plate. An adjusting shaft 270 that slides and is limited on the base 1 passes through the mounting support plate 27. An arc groove 271 is formed on the base 1 corresponding to the sliding path of the adjusting shaft 270. In order to drive the mounting support plate 27 and the adjusting shaft 270 to deflect and slide, a telescopic cylinder 272 is also connected between the mounting support plate 27 and the base 1. The telescopic section of the telescopic cylinder 272 is rotatably connected to the mounting support plate 27, and its fixed section is fixedly limited on the base 1.

[0070] It should be noted that, since the mounting support plate 27 and the mounting base 20 need to be driven to tilt downward as a whole, the telescopic cylinder 272 needs to be kept in a relatively extended state in the initial state so that the mounting support plate 27 and the mounting base 20 are relatively parallel to the horizontal plane.

[0071] When using this device to transport and cut longer pipes, the telescopic cylinder 272 retracts downwards. After its telescopic section moves down, the mounting support plate 27 and the adjusting shaft 270 are driven to slide down along the arc-shaped groove 271. At the same time, the mounting base 20 deflects downwards around the extended connecting shaft 258, forming a state at a certain angle to the horizontal plane. At this time, when the device transports and processes the pipe, the end of the longer pipe away from the cutting head tilts and moves down synchronously with the tilt of the mounting base 20 to contact the ground, thus avoiding the extra pressure caused by the suspension of the un-clamped and unprocessed section of the pipe. Furthermore, the clamping and transporting of the pipe by the rotating ring 250 and the clamping plate effectively avoids the problem of the cutting device needing to occupy a large space.

[0072] Furthermore, the present invention also provides a laser cutting method for polyethylene pipes, comprising the following steps:

[0073] S1: Place the polyethylene pipe to be processed on the mounting base 20, clamp and limit the pipe through the clamping end 22, and then drive the clamping end 22 and the pipe clamped and limited by it to move forward synchronously through the rotation of the conveying roller 21 and the conveyor belt 210 on the mounting base 20.

[0074] S2: While the pipe is clamped and limited by the clamping end 22, the other end of the pipe is limited by the limiting frame 25 and the rotating ring 250. At the same time, the rotating ring 250 and the pipe clamped by it are rotated and adjusted. Then, the limiting frame 25, the rotating ring 250, the sliding frame 11 and the laser cutting head 10 are driven forward synchronously by the rotating adjusting screw 230.

[0075] S3: After the pipe is cut, the conveyor belt 210 continues to drive the clamping end 22 and the pipe forward, while the rotating ring 250 and the laser cutting head 10 move back by adjusting the reverse rotation of the screw 230. This process is repeated to achieve continuous cutting of the pipe.

[0076] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0077] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser cutting device for polyethylene pipes, comprising a base (1) and a laser cutting head (10), characterized in that: The laser cutting head (10) is confined on the base (1) by a sliding bracket (11), and a conveying component (2) for conveying polyethylene pipes is also connected to the base (1). The conveying component (2) includes: Mounting base (20), horizontally limited to base (1); A number of conveying rollers (21) are symmetrically distributed on both sides of the mounting base (20). The conveying rollers (21) on the same side of the mounting base (20) are connected to a conveyor belt (210). A number of sliding limit clamping ends (22) of the mounting base (20) are provided between the opposite sides of the two conveyor belts (210). The clamping ends (22) are driven by the conveyor belt (210) to rotate and slide in order to clamp and convey the pipe. The telescopic support (23) is set with a U-shaped structure. Its two vertical telescopic sections are limited to the mounting base (20). An adjusting screw (230) is installed on the horizontal section of the telescopic support (23). The sliding connecting frame (11) is threaded on the adjusting screw (230). A limiting slide (231) that is limited to the telescopic support (23) is connected to the sliding connecting frame (11). The end of the adjusting screw (230) away from the mounting base (20) is also threaded with a limiting frame (25). The limiting frame (25) is fitted with a rotating ring (250) at the upper limit. Several clamping screws (251) are arranged circumferentially on the rotating ring (250). A driven gear (252) is threaded on the clamping screw (251) and located on the rotating ring (250). All the opposite ends of the clamping screws (251) are connected to clamping arc plates (253). The driven gears (252) mesh together with a drive gear ring (254) located within the rotating ring (250), and a limiting rod (255) with a limit setting is connected to the drive gear ring (254) and the limiting frame (25). The rotating ring (250) is evenly provided with several teeth (256) in the circumferential direction. On the base (1), a drive toothed cylinder (257) is rotatably connected to the rotating ring (250) and the several teeth (256) thereon, so as to guide the rotating ring (250) to slide and drive the rotating ring (250) to rotate. The drive gear cylinder (257) has a connecting shaft (258) that is limited to the telescopic section of the telescopic support frame (23) in the middle. The connecting shaft (258) is limited to the base (1) and the connecting shaft (258) and the adjusting screw (230) are connected by a synchronous belt drive. The limiting rod (255) is fitted with a driven slider (26) that is limited to the limiting frame (25), and the limiting rod (255) is fitted with a compression spring (260) that is located between the limiting frame (25) and the driven slider (26).

2. The laser cutting device for polyethylene pipes according to claim 1, characterized in that: The sliding frame (11) is also connected to an installation frame (24), on which several rollers (240) are evenly arranged.

3. The laser cutting device for polyethylene pipes according to claim 1, characterized in that: The clamping end (22) includes several sliding blocks (220) connected between two conveyor belts (210). Two clamping plates (221) are symmetrically sliding and limiting on the same sliding block (220). Driven guide rods (222) are symmetrically connected to the opposite ends of the two clamping plates (221). A guide slide (223) for guiding and limiting the sliding path of several driven guide rods (222) is also symmetrically limited on the mounting base (20).

4. The laser cutting device for polyethylene pipes according to claim 3, characterized in that: A return spring (224) located on the slide block (220) is connected between two clamping plates (221) on the same slide block (220).

5. A laser cutting method for polyethylene pipes, employing a laser cutting apparatus for polyethylene pipes as described in any one of claims 1-4, characterized in that, The cutting method includes the following steps: S1: Place the polyethylene pipe to be processed on the mounting base (20), clamp and limit the pipe through the clamping end (22), and then drive the clamping end (22) and the pipe clamped and limited by it to move forward synchronously through the rotation of the conveying roller (21) and the conveyor belt (210) on the mounting base (20). S2: While the pipe is clamped by the clamping end (22), the other end of the pipe is clamped by the limiting frame (25) and the rotating ring (250). At the same time, the rotating ring (250) and the pipe clamped by it are rotated and adjusted. Then, the limiting frame (25), the rotating ring (250), the sliding frame (11) and the laser cutting head (10) are driven forward synchronously by the rotating adjusting screw (230). S3: After the pipe is cut, the conveyor belt (210) continues to drive the clamping end (22) and the pipe forward, while the rotating ring (250) and the laser cutting head (10) move back by adjusting the screw (230) in the opposite direction. This process is repeated to achieve continuous cutting of the pipe.

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