Laser cutting device and method for pipe processing

Abstract

The application belongs to the field of laser cutting pipes, and particularly relates to a laser cutting device and method for pipe processing. The device comprises a rack, a cutting main body, an articulated main body, a pipe end positioning component and a laser cutting head. The articulated main body is integrated with a square pipe pressing head and a circular pipe pressing head with an arc-shaped elastic structure below, which can quickly switch and adapt to square pipe and circular pipe clamping without the need to replace the clamp. The rack is provided with a partition hole to realize laser avoidance and automatic slag falling, and avoid equipment burning and residue adhesion. The pipe end positioning component is provided with a distance measuring infrared device and a locking structure to ensure accurate positioning of the pipe. The laser cutting head is driven by a double-guiding transmission mechanism, and is stable in operation and high in cutting precision. The method can complete pipe placement, positioning, pressing and cutting through a standardized process, and is suitable for general processing of square pipes and circular pipes, and has the advantages of convenient type changing, non-damage clamping, accurate positioning, safety and high efficiency, and can meet the production needs of batch high-precision pipe cutting.

Description

Technical Field

[0001] This invention relates to the field of laser cutting of pipes, and more particularly to laser cutting apparatus and methods for pipe processing. Background Technology

[0002] Existing traditional laser tube cutting equipment typically uses simple, specialized fixtures that can only accommodate square or round tubes of a single specification, failing to provide universal clamping for both. When changing tube cross-section types during production, the entire fixture set must be disassembled and replaced, and alignment readjusted. This cumbersome and time-consuming process severely disrupts continuous production, significantly reducing overall processing efficiency. Furthermore, the fixtures have limited compatibility, exhibiting extremely poor versatility with different tube diameters and side lengths, resulting in weak equipment compatibility and severely limiting the production of multiple tube types.

[0003] Traditional clamps often employ rigid clamping structures, resulting in a small clamping contact area and concentrated force. Even a slight increase in clamping force can easily crush thin-walled round pipes. Furthermore, the hard edges of the clamps can easily scratch or abrade the outer surface of the pipe, damaging its appearance and anti-corrosion coating. Uneven force distribution at the clamping points can also cause round pipes to deform under pressure or become out of round, leading to pipe center offset. This can result in center eccentricity issues during subsequent laser cutting, directly causing tilted cut surfaces, irregular bevels, and increased product scrap rates.

[0004] Traditional pressure clamping structures lack stability, and after the pipe is clamped, the end edge is prone to warping and the pipe body is suspended and wobbling. During the cutting process, the whole machine vibrates and the pipe's micro-displacement is obvious. Affected by the pipe's vibration and positional deviation, the laser cutting trajectory is prone to deviation, the cut is twisted and not straight, the cutting surface is uneven and the burrs are too large, which cannot meet the requirements of high-precision pipe processing dimensions and end face flatness.

[0005] Pipe cutting to length relies entirely on manual marking and simple baffle alignment, with positioning determined by visual inspection throughout the process, lacking precise mechanical positioning benchmarks. Manual operation results in visual and alignment deviations, leading to large variations in pipe length and inconsistent dimensions during batch processing. This not only wastes a significant amount of raw materials but also causes poor matching and misalignment in subsequent pipe fitting assembly.

[0006] The equipment's simple positioning plate lacks a locking and reinforcement structure, making it prone to loosening and displacement due to long-term impact from pipe collisions and cutting vibrations. The positioning reference constantly shifts with each loading and batch processing, resulting in large dimensional deviations between processed pipes of the same batch and different batches, poor product consistency, and an inability to meet the needs of standardized mass production.

[0007] The pipe cutting points, opening positions, and cutting segment spacing rely entirely on the operator's experience to manually adjust the alignment, without any standardized parameter presets. When changing to new products or modifying specifications, repeated trial cuts and fine-tuning of positions are required, resulting in a large amount of trial cut waste, long debugging cycles, slow production speed, and serious delays in production delivery.

[0008] Traditional equipment often uses a single-bar drive structure or lacks a precision guide mechanism. The cutting head has insufficient rigidity and poor stability, and is prone to shaking left and right or swaying up and down when moving and cutting at high speed. This directly causes the laser cut to be curved and not straight, and the pipe cutting surface to show a wavy and uneven deformation. In some places, the laser energy deviation may also result in incomplete cutting or partial cutting of the material, resulting in a large amount of subsequent secondary processing work.

[0009] Long-term use of the equipment frame can easily lead to unevenness, deformation, and misalignment. The installation reference of the main cutting body and the frame will be offset, and the whole machine will be tilted after the pipe is placed. The laser cutting height cannot be kept uniform, the laser focus will deviate from the optimal cutting position, the cutting depth of the same pipe will be different, and some parts will be overburned while others will not be cut through, resulting in extremely unstable processing quality.

[0010] The equipment's workbench lacks a dedicated obstacle avoidance structure and protective design. After the laser penetrates the pipe, it strikes the machine frame table directly and vertically. Long-term high-temperature burning will erode and damage the table surface and machine frame structure, shortening the equipment's service life. At the same time, high-temperature lasers can easily cause oxidation and deformation of the table surface, or even ignite cutting smoke and debris, posing safety hazards such as fire and high-temperature burns, resulting in low production safety assurance.

[0011] High-temperature molten slag and metal residue generated during laser cutting of pipes fall directly onto the workbench and accumulate. At the same time, a large amount of molten slag adheres to the cut end of the pipe and the surface of the pipe wall. After solidification, the slag is hard and has strong adhesion, making manual cleaning and polishing difficult and time-consuming. This adds a lot of extra cost to manual polishing and slag removal processes and can easily damage the pipe body due to excessive polishing.

[0012] When switching between square tube and round tube processing categories in production, not only is it necessary to replace the entire fixture, but also to readjust the clamping center and correct the equipment level and cutting benchmark. The entire changeover process involves many steps, is difficult to debug, and has a long downtime. Moreover, the entire process relies on manual debugging by professional technicians, resulting in high labor costs and a significant reduction in the effective utilization rate of the equipment.

[0013] Traditional equipment lacks automated linkage control. After the pipe is loaded, it requires manual support to straighten it and manual operation to tighten and fix it. The tightening action and the laser cutting action cannot be intelligently linked and matched. The manual operation of supporting the pipe is close to the cutting area, which poses safety risks of mechanical compression and laser radiation. Moreover, the tightening force and the position of supporting the pipe are all controlled by humans each time, resulting in poor clamping consistency and further aggravating the problems of cutting size deviation and unstable end face quality.

[0014] On May 5, 2026, using "pipe and laser and cutting and compression and partition" as the full-text keywords, specifying IPC classification number B23K26 / 38, and selecting to allow synonym expansion, a search was conducted in the China Patent Publication Database, and six documents were found.

[0015] CN119159244A has the following drawbacks compared to existing technologies: "It is only suitable for wide-width laser die-cutting and slitting of lithium battery electrode sheets, and can only process flexible electrode strips. It lacks functions such as tube clamping, fixed-length positioning, and square / round tube switching. It adopts a production line-style transmission and cutting method, which cannot be adapted to the fixing and axial cutting of rigid square / round tubes. It lacks partition hole protection and anti-slag adhesion design, and the clamping and positioning accuracy cannot meet the requirements for tube cutting." CN120155675A has the following drawbacks compared to existing technologies: “It only performs pneumatic clamping on the inner wall of titanium alloy tubes, has a limited range of applicable scenarios, can only be used for opening holes in thin-walled titanium alloy tubes, has no square tube adaptation structure, no external fixed-length positioning and automated cutting drive mechanism, cannot achieve universal external clamping and straight cutting of square / round tubes, and has no laser cutting protection and slag treatment design.” CN223385597U has the following drawbacks compared to existing technologies: "It is a lithium battery electrode vacuum belt conveyor mechanism that only realizes electrode adsorption, transmission and dust removal, without any tube clamping, positioning or cutting functions. Vacuum adsorption is only suitable for flexible thin sheets and cannot fix rigid square / round tubes. There is no cutting precision control or safety protection structure." The drawback of CN223506424U compared to existing technologies is that it is a picosecond laser forming sheet machine, which is only used for cutting, slitting, testing and collecting lithium battery electrode sheets. The processing object is electrode sheet strips. It has no tube adaptation structure, no square tube to round tube switching, fixed length positioning, laser protection function, and the whole is a production line electrode sheet processing logic. The drawback of CN114905148A compared to existing technologies is that "it is a smoke extraction system for a dual-station PCB splitting machine, which is only used for extracting smoke from PCB cutting and has no functions for pipe processing, clamping, positioning, or cutting. Its core function is smoke channel control, which is completely unrelated to the mechanical structure, precision control, and safety protection of pipe laser cutting." The CN115213555A has the following drawbacks compared to existing technologies: "It is a dual-station laser PCB separator, which is only used for dual-station cutting of circuit boards. The processing object is PCB board. It uses an adsorption platform for fixation and has no functions such as tube clamping, square tube to round tube switching, fixed length positioning, or partition hole protection. It cannot be adapted to three-dimensional cutting of tubes." Summary of the Invention

[0016] Purpose of the invention: To provide a laser cutting apparatus and method for pipe treatment with better results, the specific purpose of which is described in the several substantial technical effects in the detailed implementation section.

[0017] To achieve the above objectives, the present invention adopts the following technical solution: A laser cutting device for pipe processing, characterized in that the laser cutting device includes a frame 1, the frame 1 includes a plurality of partition holes, the pipe can be arranged on the frame, and the cutting position can be cut above the partition holes; The frame consists of two parts, with the cutting body 3 in the middle. The basic base of the cutting body 3 is hinged to the hinge body 4 via hinge point 14. The base of the pressing and pulling structure 8 is also hinged to the basic base of the cutting body 3. The upper part of the pressing and pulling structure 8 is hinged to the pressing and pulling structure 8. The pressing and pulling structure 8 can pull the hinge body 4 to rotate around the hinge body 4. The hinge body 4 is a plate-shaped structure. A square tube clamping head 10 and a round tube clamping head 11 are arranged below the hinge body 4; The bottom of the square tube clamping head 10 is flat and can press against the upper end face of the square tube; the bottom of the round tube clamping head 11 is an arc-shaped part 12, which can press against the round tube; the arc-shaped part 12 is made of rubber or stainless steel. On both sides of the frame 1 are fixed rails 23, which include multiple fixing holes and pipe end positioning components 2 that can move along the fixed rails 23. The pipe end positioning components 2 include vertically arranged positioning push plates 21, and ranging infrared devices 22 are arranged on the positioning push plates 21. That is, the distance between the ranging infrared devices 22 arranged on the two positioning push plates 21 is the length of the pipe. The hinge body 4 includes a vertical plate perpendicular to the hinge body 4. A moving motor 5 is arranged on the vertical plate. The moving motor 5 is a forward and reverse motor. The power output shaft of the moving motor 5 is a threaded rod. The threaded rod and the smooth rod form a threaded pair. It also includes a movable block 6, which is connected to a threaded rod via a threaded hole, and the movable block 6 is connected to a smooth rod via a smooth hole; A laser cutting head 7 is fixed on the movable block 6. The cutting edge of the laser cutting head 7 is arranged downwards, and the laser cutting head 7 can move left and right along the threaded joint with the movable block 6.

[0018] A further technical solution of the present invention is that the fixed track 23 includes a scale, and the basic base of the cutting body 3 and the two parts of the frame at both ends are in close contact; the basic base of the cutting body 3 is also arranged with a scale.

[0019] A further technical solution of the present invention is that the base of the pipe end positioning component 2 includes two sliders, which can move along the fixed track 23.

[0020] A further technical solution of the present invention is that the sliders of the fixed track 23 and the pipe end positioning component 2 are both provided with holes for bolts to pass through and thus fix the pipe end positioning component 2.

[0021] A further technical solution of the present invention is that the pressing and pulling structure 8 is a telescopic cylinder structure.

[0022] A further technical solution of the present invention is that the arc-shaped portion 12 of the stainless steel layer can elastically compress the circular steel pipe.

[0023] A further technical solution of the present invention is that the frame 1 is supported on the ground by outriggers, and the overall height of the entire frame 1 is consistent.

[0024] A further technical solution of the present invention is that the plane of the cutting body 3 that carries the pipe is at the same height as the entire frame 1.

[0025] A further technical solution of the present invention is that the laser cutting head 7 has scale lines at the cutting head position.

[0026] A laser cutting method for pipe processing, characterized by using a laser cutting apparatus for pipe processing as described in any of the preceding claims, comprising the following steps: Pipe placement: Place the square or round pipe to be cut 9 stably on the frame 1, so that the pipe is above the partition hole of the frame 1, and the cutting position is precisely aligned with the partition hole; End positioning: Move the pipe end positioning component 2 along the fixed track 23 to both ends of the pipe, press the positioning push plate 21 against the pipe end face, detect and confirm the pipe length through the ranging infrared device 22, and then lock and fix the pipe end positioning component 2 to the fixed track 23 with bolts. Posture calibration: Confirm that the pipe bearing plane of the cutting body 3 is consistent with the overall height of the frame 1, and that the pipe is horizontal and without tilt; Square tube cutting: Tightening and fixing: Activate the tightening and pulling structure 8 to push the hinge body 4 to rotate downward around the hinge point 14, so that the bottom of the plane of the square tube clamping head 10 tightly presses against the upper end face of the square tube 9 to achieve reliable clamping; Cutting preparation: Start the moving motor 5, and the moving block 6 is driven by the threaded rod to move along the optical rod to position the laser cutting head 7 to the preset cutting starting point of the square tube 9; Execute the cutting: Turn on the laser cutting head 7, and drive the moving block 6 to move left and right at a constant speed through the forward and reverse rotation of the moving motor 5. The laser cutting head 7 cuts the square tube 9 along a straight line, and the cutting path passes above the partition hole of the frame 1; repeat the cutting until the cutting is completed. Cutting complete: Turn off the laser cutting head 7, reverse the driving clamping and pulling structure 8, lift the hinge body 4 and square tube clamping head 10, and take out the cut square tube 9; Round tube cutting: Pressing and fixing: Activate the pressing and pulling structure 8, push the hinge body 4 to rotate downward around the hinge point 14, so that the arc-shaped part 12 of the round tube pressing head 11 fits against the outer wall of the round tube and is elastically pressed; Cutting preparation: Start the moving motor 5, drive the moving block 6 to move the laser cutting head 7 to the preset cutting starting point of the round tube, and ensure that the cutting edge of the laser cutting head 7 is facing down and aligned with the round tube; Execute the cutting: Turn on the laser cutting head 7, and drive the moving block 6 to move at a constant speed by the moving motor 5. The laser cutting head 7 cuts along the axial direction of the round tube, and the cutting position is located above the partition hole of the frame 1; repeat the cutting until the cutting is completed. Cutting complete: Turn off the laser cutting head 7, drive the clamping and pulling structure 8 to lift the hinge body 4, the arc part 12 loosens the round tube, and take out the cut round tube; Finishing and resetting: Turn off the moving motor 5 and the laser cutting head 7, clean up the cutting residue; loosen the pipe end positioning component 2 and reset it to the initial position to prepare for the next cutting operation.

[0027] The present invention, employing the above technical solution, offers the following advantages over existing technologies: This patented laser cutting device and method for pipe processing fundamentally addresses the pain points of traditional equipment, demonstrating significant advantages. The device integrates dual clamping heads for square and round pipes, allowing for clamping switching without changing fixtures; flexible clamping prevents pipe damage and out-of-roundness. Combined with infrared ranging and a scale reference, it achieves precise pipe length positioning, eliminating deviation; dual-guide transmission ensures stable cutting head operation and accurate cuts; frame partition holes enable laser avoidance and automatic slag removal, ensuring equipment safety and reducing cleaning costs; the automated clamping mechanism links with the cutting action, improving safety and consistency. Multiple embodiments optimize the structure, adapting to standardized mass production. Unlike existing lithium battery and circuit board laser equipment, this device is specifically designed for rigid pipe cutting, achieving multi-purpose functionality, high precision, high efficiency, and high safety, comprehensively solving the shortcomings of traditional equipment such as cumbersome changeovers and low precision. Attached Figure Description

[0028] To further illustrate the present invention, the following description is provided in conjunction with the accompanying drawings: Figure 1 This is a schematic diagram of the invention. Figure 2 A three-dimensional view of the invention as a whole; Figure 3 A three-dimensional view of the invention from another perspective; Figure 4 This is a front structural view of the invention; Figure 5 A three-dimensional view of the invention from another perspective; The components include: 1. Frame; 2. Pipe end positioning component; 3. Cutting body; 4. Hinge body; 5. Moving motor; 6. Moving block; 7. Laser cutting head; 8. Pressing and pulling structure; 9. Square tube; 10. Square tube pressing head; 11. Round tube pressing head; 12. Arc-shaped part; 13. Operating table; 14. Hinge point; 21. Positioning push plate; 22. Distance measuring infrared device; 23. Fixed track. Detailed Implementation

[0029] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] This patent provides multiple parallel solutions; the different descriptions represent improved solutions or parallel solutions based on the basic solution. Each solution has its own unique characteristics. Furthermore, the technical features involved in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other. Fixing methods not described herein can be any type of fixing, such as threaded fixing, bolt fixing, or adhesive bonding.

[0032] The choice of materials used in an invention does not limit the scope of protection.

[0033] Example 1: as a further improvement, parallel solution, or optional independent solution; This embodiment describes a laser cutting device for pipe processing, characterized in that the laser cutting device includes a frame 1, which has multiple partition holes. Pipes can be arranged on the frame, and the cutting position is above the partition holes. The frame comprises two parts, with a cutting body 3 in the middle. A hinged body 4 is hinged to the basic base of the cutting body 3 via a hinge point 14. A base of a pressing and pulling structure 8 is also hinged to the basic base of the cutting body 3. The upper part of the pressing and pulling structure 8 is hinged to the pressing and pulling structure 8, which can pull the hinged body 4 to rotate around it. The hinged body 4 is a plate-like structure. A square tube pressing head 10 and a round tube pressing head 11 are arranged below the hinged body 4. The bottom of the square tube pressing head 10 is flat and can press against the upper end face of the square tube. Below the round tube pressing head 11 is an arc-shaped portion 12, which can press against the round tube. The arc-shaped portion 12 is... The frame 1 is made of rubber or stainless steel. Fixed rails 23 are located on both sides of the frame 1. Each fixed rail 23 contains multiple fixing holes and a pipe end positioning component 2 that can move along the fixed rails 23. The pipe end positioning component 2 includes a vertically arranged positioning push plate 21, on which a ranging infrared device 22 is arranged. The distance between the ranging infrared devices 22 arranged on the two positioning push plates 21 is the length of the pipe. The hinge body 4 includes a vertical plate perpendicular to the hinge body 4. A moving motor 5 is arranged on the vertical plate. The moving motor 5 is a forward and reverse rotating motor, and its power output shaft is a threaded rod. The threaded rod and the smooth rod form a threaded pair. The frame 6 also includes a moving block 6, which connects to the threaded rod through a threaded hole and to the smooth rod through a smooth hole. A laser cutting head 7 is fixed on the moving block 6, with its cutting edge facing downwards. The laser cutting head 7 can move left and right along the threaded pair with the moving block 6.

[0034] Compared to the shortcomings of existing technologies, traditional laser tube cutting equipment often uses simple, specialized clamps that can only accommodate square or round tubes of a single specification. This makes it impossible to achieve universal clamping for both square and round tubes. Changing tube types requires stopping the machine to replace the entire clamping set and readjusting the alignment, which is cumbersome and time-consuming, and the equipment has weak compatibility. Rigid clamping can easily damage the tube, and round tubes are prone to deformation and loss of roundness. During the cutting process, the tube is prone to movement and vibration, resulting in skewed cuts and poor accuracy. The tube length relies on manual marking and baffle positioning, leading to large dimensional errors. Shaking and deviation of the cutting head during operation can cause curved cuts, wavy cross-sections, and even incomplete cuts. Direct laser beams onto the machine table can easily burn the equipment and pose significant safety hazards. Molten slag accumulates and sticks to the tube, leading to problems later. "High cleaning and grinding costs"; This patent innovatively integrates the square tube clamping head 10 and the round tube clamping head 11 into the same hinge body 4 in a non-obvious way. It uses the arc-shaped part 12 made of rubber or stainless steel to achieve flexible clamping. The clamping and pulling structure 8 drives the hinge body 4 to rotate to complete the clamping switch. Combined with the positioning push plate 21 and the ranging infrared device 22, it achieves precise length positioning of the tube. The dual guide transmission mechanism composed of threaded rod and smooth rod drives the moving block 6 and the laser cutting head 7 to move smoothly. The partition hole of the frame 1 is used to achieve laser penetration avoidance and molten slag falling. It solves the defects of the existing technology from multiple dimensions such as clamping adaptability, tube protection, positioning accuracy, cutting stability and production safety.

[0035] Example 2: as a further improvement, parallel, or alternative independent solution; The embodiment described here is as follows: the laser cutting device for pipe processing as described in Embodiment 1 is characterized in that the fixed track 23 includes a scale, the basic base of the cutting body 3 and the two parts of the frame at both ends are in close contact; the basic base of the cutting body 3 is also arranged with a scale.

[0036] Compared to the shortcomings of existing technologies, such as "simple positioning plates lack scale references, pipe positioning and cutting position adjustment rely on manual experience, resulting in low repeatability and long adjustment cycles due to repeated trial cuts during production changes," this patent innovatively and non-obviously sets scales on both the fixed track 23 and the basic base of the cutting body 3. This provides a visual and precise reference for the movement and positioning of the pipe end positioning component 2 and the cutting position adjustment of the laser cutting head 7. It eliminates the need for manual judgment based on experience, allows for quick reset of positioning and cutting parameters during batch processing, improves repeatability and production changeover efficiency, and ensures the consistency of pipe dimensions.

[0037] Example 3: As a further improvement, parallel, or alternative independent solution; Example here: The laser cutting device for pipe processing as described in Example 1, characterized in that the base of the pipe end positioning component 2 includes two sliders, which can move along the fixed track 23.

[0038] In contrast to the shortcomings of existing technologies, such as "poor movement and guidance of pipe positioning components, which are prone to jamming or deviation, resulting in inaccurate positioning of pipe end face and large length detection error", this patent innovatively and non-obviously sets two sliders on the base of the pipe end positioning component 2, so that the sliders and the fixed track 23 form a double-track guiding cooperation, ensuring that the pipe end positioning component 2 moves smoothly and linearly along the fixed track 23 without jamming or deviation, and ensuring that the positioning push plate 21 is accurately pressed against the pipe end face, providing a stable foundation for the length detection of the ranging infrared device 22.

[0039] Example 4: as a further improvement, parallel solution, or optional independent solution; The embodiment described here is as follows: the laser cutting device for pipe processing as described in Embodiment 3, characterized in that the sliders of the fixed track 23 and the pipe end positioning component 2 are provided with holes for bolts to pass through and thus fix the pipe end positioning component 2.

[0040] Compared with the shortcomings of existing technologies, such as "simple positioning plates without locking structures are easily loosened by collisions and vibrations, the positioning reference shifts during repeated processing, resulting in poor product consistency and inability to achieve mass standardized production", this patent innovatively and non-obviously sets fixing holes corresponding to the slider of the fixed track 23 and the pipe end positioning component 2. The bolts pass through the holes to achieve locking and fixing. After positioning, there is no risk of loosening or displacement, ensuring that the pipe cutting length reference is always stable and meeting the accuracy requirements of mass standardized production.

[0041] Example 5: as a further improvement, parallel solution, or optional independent solution; The embodiment described here is as follows: the laser cutting device for pipe processing as described in Embodiment 1, characterized in that the clamping and pulling structure 8 is a telescopic cylinder structure.

[0042] Compared to the shortcomings of existing technologies, such as "the clamping mechanism and the cutting action are not synchronized, requiring manual pipe support and manual clamping, which poses safety risks due to close-range operation, and the clamping force and position are controlled manually, resulting in poor consistency", this patent innovatively and non-obviously sets the clamping and pulling structure 8 as a telescopic cylinder structure to achieve automated telescopic drive. It can precisely control the rotation angle and clamping force of the hinge body 4, and form an action linkage with the laser cutting head 7 and the moving motor 5 to automatically complete the clamping and loosening of the pipe without the need for close-range manual operation, eliminating safety hazards and ensuring clamping consistency.

[0043] Example 6: As a further possible improvement, parallel solution, or alternative independent solution; Example here: Laser cutting device for pipe processing as described in Example 1, characterized in that the arc-shaped portion 12 of the stainless steel layer can elastically press against the circular steel pipe.

[0044] Compared to the shortcomings of existing technologies, such as "traditional clamps use rigid clamping, resulting in a small contact area, concentrated force, easy crushing of thin-walled round tubes, scratching of the tube surface, and easy elliptical deformation and center offset of the round tubes, leading to eccentric cutting and increased product scrap rate", this patent innovatively and non-obviously adopts the arc-shaped part 12 of the stainless steel layer to achieve elastic clamping, increasing the contact area with the round steel tube, flexibly fitting the outer wall of the tube, and distributing the force evenly without concentrated stress, preventing the round tube from being squeezed and deformed or deformed, ensuring that the center of the tube does not shift, avoiding the problem of eccentric cutting from the root, and reducing the product scrap rate.

[0045] Example 7: as a further improvement, parallel solution, or optional independent solution; The embodiment described here is as follows: the laser cutting device for pipe processing as described in Embodiment 1 is characterized in that the frame 1 is supported on the ground by legs, and the overall height of the entire frame 1 is uniform.

[0046] Compared with the shortcomings of existing technologies, such as "the equipment frame is prone to deformation and misalignment, the host and frame references are offset, the pipe is tilted, the cutting height is inconsistent, the focus is deviated, the cutting depth is uneven, and the quality is unstable", this patent innovatively and non-obviously supports the frame 1 stably with the support legs and the overall height is uniform, eliminating the problem of deformation and misalignment of the frame itself, providing a horizontal reference plane for the placement of the pipe, ensuring that the pipe is placed without tilting, and laying the foundation for stable cutting and precise focus alignment of the laser cutting head 7.

[0047] Example 8: as a further improvement, parallel solution, or optional independent solution; The embodiment described here is as follows: the laser cutting device for pipe processing described in Embodiment 7 is characterized in that the plane of the cutting body 3 that carries the pipe is at the same height as the entire frame 1.

[0048] Compared to the shortcomings of existing technologies, such as "the cutting body and the frame reference plane are not flush, the pipe is tilted after placement, the cutting height is unstable, the focus is offset, and the uniformity of the cutting depth is poor", this patent innovatively and non-obviously makes the plane of the cutting body 3 carrying the pipe flush with the overall height of the frame 1, ensuring that the pipe is horizontal and tilt-free throughout the process, the cutting height of the laser cutting head 7 and the pipe surface is always consistent, the laser focus is in the optimal cutting position, and the cutting depth is uniform between the same pipe and between different pipes, ensuring stable processing quality.

[0049] Example 9: as a further improvement, parallel solution, or optional independent solution; The embodiment described here is as follows: the laser cutting device for pipe processing as described in Embodiment 1, characterized in that the laser cutting head 7 has scale lines at the cutting head position.

[0050] Compared to the shortcomings of existing technologies, such as "the cutting point and opening position rely on the operator's experience for manual adjustment, there are no standardized parameters, and repeated trial cutting is required for production changeovers, resulting in long debugging cycles and delays in delivery," this patent innovatively sets a scale line at the cutting head position of the laser cutting head 7, providing a precise scale reference for the positioning of the cutting starting point and the adjustment of the cutting path. Standardized cutting parameters can be preset, eliminating the need to rely on manual experience, reducing waste generation, and shortening the debugging cycle.

[0051] Example 10: as a further improvement, parallel solution, or optional independent solution; The embodiment described here is a laser cutting method for pipe processing, characterized by using the laser cutting device for pipe processing described in any one of embodiments one to nine, including the following steps: Pipe placement: The square tube 9 or round tube to be cut is stably placed on the frame 1, so that the pipe is located above the partition hole of the frame 1, and the cutting position is precisely aligned with the partition hole; End positioning: The pipe end positioning component 2 is moved along the fixed track 23 to both ends of the pipe, and the positioning push plate 21 is used to press against the pipe end face. The pipe length is detected and confirmed by the ranging infrared device 22, and then the pipe end positioning component 2 is locked and fixed to the fixed track 2 with bolts. 3; Posture calibration: Confirm that the pipe bearing plane of the cutting body 3 is consistent with the overall height of the frame 1, and that the pipe is horizontal and without tilt; Square tube cutting: Clamping and fixing: Activate the clamping and pulling structure 8, pushing the hinge body 4 to rotate downward around the hinge point 14, so that the bottom of the plane of the square tube clamping head 10 tightly presses against the upper end face of the square tube 9, achieving reliable clamping; Cutting preparation: Activate the moving motor 5, which drives the moving block 6 to move along the optical rod, positioning the laser cutting head 7 at the preset cutting starting point of the square tube 9; Execute cutting: Turn on the laser cutting head 7, and drive the moving block 6 to move left and right at a uniform speed through the forward and reverse rotation of the moving motor 5. Laser cutting head 7 cuts square tube 9 along a straight line, with the cutting path passing above the partition hole of frame 1; reciprocating cutting until the cutting is complete; cutting complete: turn off laser cutting head 7, reverse drive clamping and pulling structure 8, lift hinge body 4 and square tube clamping head 10, and remove the cut square tube 9; round tube cutting: clamping and fixing: start clamping and pulling structure 8, push hinge body 4 to rotate downward around hinge point 14, so that the arc-shaped part 12 of round tube clamping head 11 fits against the outer wall of round tube and elastically clamps it; cutting preparation: start moving motor 5, drive moving block 6 to move laser cutting head 7 to the preset cutting starting point of round tube. Ensure the laser cutting head 7 is facing downwards and aligned with the round tube; Execute cutting: Turn on the laser cutting head 7, and the moving block 6 is driven by the moving motor 5 to move at a constant speed. The laser cutting head 7 cuts along the axial direction of the round tube, and the cutting position is located above the partition hole of the frame 1; Repeat cutting until the cutting is completed; Cutting completed: Turn off the laser cutting head 7, drive the clamping and pulling structure 8 to lift the hinge body 4, and the arc-shaped part 12 releases the round tube, and remove the cut round tube; Finishing and resetting: Turn off the moving motor 5 and the laser cutting head 7, and clean up the cutting residue; Release the pipe end positioning component 2 and reset it to the initial position to prepare for the next cutting operation.

[0052] Compared to the shortcomings of existing technologies, such as "the process of switching between square and round tube sections is cumbersome and time-consuming; the entire process of tube positioning, clamping, and cutting relies on manual operation, resulting in low efficiency and large errors; and the difficulty in cleaning slag after cutting increases process costs," this patent innovatively and non-obviously integrates pipe placement, end positioning, posture calibration, square / round tube type cutting, and end-resetting into a standardized cutting process. It simplifies the changeover steps by quickly switching between the square tube clamping head 10 and the round tube clamping head 11. The entire process is precisely controllable through the ranging infrared device 22, the scale reference, and the automated clamping and transmission mechanism. The slag is automatically cleaned by the partition hole of the frame 1, which greatly improves cutting efficiency, reduces labor costs and operational errors, and ensures continuous and standardized production.

[0053] 1. Addressing the shortcomings: Poor adaptability and low compatibility of equipment used for clamping square and round tubes. In contrast to the shortcomings of existing technologies, "traditional laser tube cutting equipment is mostly equipped with simple and specialized fixtures, which can generally only be adapted to a single specification of square or round tubes. It cannot achieve universal clamping of square and round tubes. Changing tubes requires stopping the machine to replace the entire set of fixtures and readjusting the alignment, which is cumbersome and time-consuming, and the equipment has weak compatibility." This patent innovatively integrates the square tube clamping head 10 and the round tube clamping head 11 into the same hinge body 4. The bottom of the square tube clamping head 10 is flat to adapt to the upper end face of the square tube 9, and the bottom of the round tube clamping head 11 is provided with an arc-shaped part 12 to adapt to the outer wall of the round tube. When changing between square tubes 9 and round tubes, there is no need to disassemble and replace the fixtures. The clamping head can be switched simply by driving the hinge body 4 around the hinge point 14 through the clamping and pulling structure 8. There is no need to readjust the clamping center, which greatly improves the compatibility of clamping square and round tubes and the equipment compatibility, and ensures continuous production.

[0054] 2. Addressing the defects: Rigid clamping easily damages the pipe, and round pipes are prone to loss of roundness and deformation. In contrast to the shortcomings of existing technologies, such as "traditional clamps using rigid clamping with small contact area and concentrated force, easily crushing thin-walled round tubes, scratching the tube surface, causing round tubes to become elliptical and lose their roundness, and resulting in eccentric cutting and increased product scrap rate," this patent innovatively and non-obviously sets the arc-shaped portion 12 of the round tube clamping head 11 to be made of rubber or an elastic stainless steel layer, increasing the contact area with the round tube and achieving elastic and flexible clamping, avoiding hard edges from scratching the outer wall of the tube and the anti-corrosion coating; the square tube clamping head 10 has uniform force at the bottom of the plane, and the arc-shaped portion 12 elastically fits the outer wall of the round tube, with uniform clamping force, preventing the round tube from being squeezed and deformed or losing its roundness, ensuring that the center of the tube does not shift, fundamentally avoiding the problem of eccentric cutting, and reducing the product scrap rate.

[0055] 3. Addressing the defects: During the cutting process, the pipe is prone to movement and vibration, resulting in skewed cuts and poor precision. Compared to the shortcomings of existing technologies, such as "the traditional top-pressure clamping method lacks stability, the pipe end is prone to warping, the pipe body is suspended and swaying, the whole machine vibrates and the pipe is slightly displaced during cutting, resulting in the cutting trajectory deviating, the cut is distorted, and the cross-section is uneven", this patent innovatively and non-obviously forms a hinged linkage clamping with the clamping and pulling structure 8 and the hinged body 4. The square tube clamping head 10 and the round tube clamping head 11 stably press against the pipe from top to bottom, and with the stable support of the frame 1, the pipe end warping and the pipe body swaying are eliminated. The clamping structure has both rigidity and stability, and there is no pipe movement or vibration during the cutting process, which ensures the accuracy of the laser cutting trajectory, the straight cut, and the flat cross-section, meeting the requirements of high-precision processing.

[0056] 4. Regarding the defect: the pipe length relies on manual marking and baffle positioning, resulting in large dimensional errors. Compared to the shortcomings of existing technologies, such as "pipe length cutting relies on manual marking and manual alignment of baffles, and there is no precise benchmark for visual judgment. Human error leads to inconsistent finished product lengths, waste of raw materials, and misalignment in assembly," this patent innovatively combines the pipe end positioning component 2 with the ranging infrared device 22. The positioning push plate 21 presses against the pipe end face, and the ranging infrared device 22 accurately detects the pipe length, replacing manual marking and visual positioning. It provides a standardized mechanical positioning benchmark, eliminates human visual error and alignment deviation, ensures accurate pipe cutting length, reduces waste of raw materials, and improves subsequent assembly matching.

[0057] 5. Addressing the defect: The positioning plate is prone to displacement, resulting in extremely low repeatability. Compared to the shortcomings of existing technologies, such as "simple positioning plates without locking structures are prone to loosening due to collisions and vibrations, repeated processing leads to positioning datum misalignment, poor product consistency, and inability to achieve mass standardized production," this patent innovatively and non-obviously proposes a method where the pipe end positioning component 2 is coupled with a fixed track 23 via a slider. The fixed track 23 and the slider have corresponding fixing holes, which are secured with bolts, eliminating the risk of loosening or displacement after positioning. The fixed track 23 is graduated, allowing for quick reset of the positioning datum during each loading and batch processing, ensuring consistent dimensions of pipe fittings across different batches and meeting the requirements of mass standardized production.

[0058] 6. Addressing the shortcomings: The cutting position relies heavily on the operator's experience, resulting in excessive waste during trial cuts and low changeover efficiency. Compared to the shortcomings of existing technologies, such as "the cutting point and opening position rely on the operator's experience for manual adjustment, there are no standardized parameters, and production changeovers require repeated trial cuts, resulting in long debugging cycles and delays in delivery," this patent innovatively and non-obviously incorporates a precision transmission mechanism consisting of a moving motor 5, a threaded rod, a guide rod, and a moving block 6. The laser cutting head 7 is fixed to the moving block 6 and can be precisely moved to the preset cutting starting point by motor drive. Both the base of the cutting body 3 and the laser cutting head 7 are equipped with scales, allowing for the preset of standardized cutting parameters. This eliminates the need for manual experience, reduces the need for repeated trial cuts during production changeovers, reduces waste, shortens the debugging cycle, and improves production changeover efficiency.

[0059] 7. Addressing defects such as: cutting head wobbling and deviation, bent kerf, wavy cross-section, or even incomplete cut. Compared to the shortcomings of existing technologies, such as "traditional equipment being driven by a single rod without precision guidance, having insufficient rigidity of the cutting head, and being prone to shaking and wobbling at high speeds, resulting in curved cuts, wavy cross-sections, and incomplete cuts with material sticking together", this patent innovatively and non-obviously connects the moving block 6 to the threaded rod through a threaded hole and to the optical rod through a light hole, forming a double-guided precision mechanism of threaded rod + optical rod. The moving motor 5 drives the moving block 6 to move in both forward and reverse directions, ensuring that the laser cutting head 7 has sufficient rigidity, no left-right shaking or up-down wobbling, a straight cutting trajectory, a uniform and unbent cut, no wavy deformation of the cross-section, and stable and unbiased laser energy, thus avoiding problems such as incomplete cuts and partial cuts with material sticking together.

[0060] 8. Addressing defects such as unstable cutting height, focus shift, and poor uniformity of cutting depth. Compared to the shortcomings of existing technologies, such as "the equipment frame is prone to deformation and misalignment, the main unit and the frame reference are offset, the pipe is tilted, the cutting height is inconsistent, the focus is deviated, the cutting depth is uneven, and the quality is unstable", this patent innovatively and non-obviously makes the overall height of the frame 1 consistent, the cutting body 3 bearing the pipe plane is flush with the overall height of the frame 1, and the pipe is placed in a horizontal and non-tilted state, ensuring that the cutting height of the laser cutting head 7 and the pipe surface is uniform, the laser focus is always in the optimal cutting position, the cutting depth is uniform between the front and back of the same pipe and between different pipes, there is no overheating or incomplete cutting problem, and the processing quality is stable.

[0061] 9. Regarding the defect: Direct laser beams onto the machine's worktable can easily burn out the equipment and pose a significant safety hazard. In contrast to the shortcomings of existing technologies, such as "the workbench lacks any avoidance or protection, the laser penetrates the tubing and directly hits the workbench surface, ablates the frame, shortens its lifespan, and easily ignites debris, causing fires and burns," this patent innovatively and non-obviously sets multiple partition holes in the frame 1. The cutting position is aligned above the partition holes, and the laser passes directly through the partition holes after penetrating the tubing, avoiding direct contact with the workbench surface of the frame 1. This eliminates the problem of high-temperature burning of the workbench surface and frame structure, extending the service life of the equipment. At the same time, it eliminates the risk of the laser igniting cutting smoke and debris, eliminates the hidden dangers of fire and high-temperature burns, and improves production safety.

[0062] 10. Addressing the defect: Cutting slag accumulates and sticks to the pipe, resulting in high costs for subsequent cleaning and grinding. Compared to the shortcomings of existing technologies, such as "cutting slag directly accumulates on the worktable, adheres to the pipe ends and pipe walls, making cleaning and polishing difficult, increasing process costs, and easily damaging the pipe body", this patent innovatively and non-obviously provides a partition hole in the frame 1. The high-temperature slag and metal residue generated during cutting fall directly through the partition hole, without accumulating on the worktable, thus avoiding residue adhesion to the pipe cut and pipe wall. It eliminates the need for extensive manual cleaning and polishing, reduces slag removal process costs, and prevents excessive polishing from damaging the pipe body.

[0063] 11. Addressing the drawback: The process of switching between square and round tube cross-sections is cumbersome, complex, time-consuming, and labor-intensive. Compared to the shortcomings of existing technologies, such as the need to change clamps, adjust clamping centers, and correct levels and benchmarks when switching between square and round tubes, which is cumbersome, causes long downtime, relies on professional technicians, and results in low equipment uptime, this patent innovatively integrates the square tube clamping head 10 and the round tube clamping head 11 into the hinged body 4 in a non-obvious way. Switching the tube cross-section only requires controlling the clamping and pulling structure 8 to rotate and switch the clamping head. There is no need to change clamps or readjust the clamping center. The horizontal benchmarks of the frame 1 and the cutting body 3 are fixed and do not need to be repeatedly corrected. The process is simplified, the downtime is short, it does not rely on professional technicians, and the effective uptime of the equipment is improved.

[0064] 12. Addressing the defect: The clamping mechanism and cutting action are not synchronized, resulting in poor safety and low product consistency. Compared to the shortcomings of existing technologies, such as "lack of automated linkage, need for manual pipe support and clamping, safety risks associated with close-range operation, and inconsistent clamping force and position due to human control," this patent innovatively and non-obviously achieves automated clamping / releasing of the clamping and pulling structure 8, forming an action linkage with the laser cutting head 7 and the moving motor 5. After the pipe is loaded, there is no need for manual pipe support and alignment; the clamping and fixing are automatically completed, with uniform clamping force and precise position. This avoids close contact between humans and the cutting area, eliminating the risks of mechanical compression and laser radiation, while ensuring consistency in clamping each time, and stabilizing the cutting size and end face quality.

[0065] I. Overall Conceptual Comparison: The Fundamental Differences Between This Invention and Existing Technologies The core of this invention is a universal laser cutting device for square / round pipes. It focuses on the integrated design of pipe cross-section compatible clamping, automated and precise positioning, stable cutting and safety protection. The goal is to solve the pain points of traditional pipe cutting equipment, such as cumbersome changeover, easy pipe damage during clamping, large positioning error, low cutting accuracy and high safety hazards, and achieve multi-purpose, high-precision, high-safety and high-efficiency pipe cutting.

[0066] Existing comparative documents are all about lithium battery electrode laser processing equipment and circuit board laser separation equipment, which only target thin flexible / rigid materials such as battery electrodes and PCB boards. They mainly solve the problems of electrode die-cutting, separation, transmission, detection, dust removal and circuit board dual-station separation smoke extraction. They are completely different from the application scenarios, processing objects and core technical paths of the present invention, which are three-dimensional clamping of pipes, fixed length cutting and cross-section protection. They belong to completely different technical fields and design ideas.

[0067] CN119159244A: Compared to the shortcomings of existing technologies, which "only perform wide-width laser die-cutting and slitting of lithium battery electrode sheets, can only process flexible electrode strips, lack tube clamping, fixed-length positioning, and square / round tube switching functions, adopt a production line-style transmission cutting, cannot adapt to the fixing and axial cutting of rigid square / round tubes, lack partition hole protection and anti-slag adhesion design, and the clamping and positioning accuracy cannot meet the requirements of tube cutting", this patent innovatively integrates the square tube clamping head and the round tube clamping head into the same hinged body, combined with the pipe end positioning component and the ranging infrared device, and adds a frame partition hole to achieve universal clamping of square and round tubes, precise fixed-length positioning of tubes, laser protection and automatic slag falling, perfectly adapting to the laser cutting scenario of rigid tubes.

[0068] CN120155675A: Compared with the shortcomings of the existing technology, which "only uses pneumatic clamping for the inner wall of titanium alloy tubes, has a limited range of applicable scenarios, can only be used for opening holes in thin-walled titanium alloy tubes, lacks a square tube adaptation structure, lacks an external fixed-length positioning and automated cutting drive mechanism, cannot achieve universal external clamping and straight cutting of square / round tubes, and lacks laser cutting protection and slag treatment design", this patent innovatively adopts an external hinged linkage clamping structure, which integrates a flat square tube clamping head and an arc-shaped round tube clamping head, and is equipped with a threaded rod + smooth rod dual-guide precision transmission and isolation hole protection, to achieve universal external fixing of square and round tubes, precise straight cutting, and no slag adhesion, and is suitable for universal cutting of various tubes rather than just opening holes in titanium alloy tubes.

[0069] CN223385597U: Compared with the shortcomings of the existing technology, which is "a vacuum belt conveyor mechanism for lithium battery electrode sheets, which only realizes electrode sheet adsorption and dust removal, without any tube clamping, positioning, or cutting functions, and the use of vacuum adsorption is only suitable for flexible thin sheets, and cannot fix rigid square / round tubes, and has no cutting precision control and safety protection structure", this patent innovatively and non-obviously adopts an articulated mechanical clamping to replace vacuum adsorption, which is suitable for fixing rigid tubes, and adds infrared ranging positioning, dual-guide transmission cutting, and isolation hole safety protection to achieve high-precision and high-stability laser cutting of tubes, rather than thin sheet transmission.

[0070] CN223506424U: Compared to the shortcomings of existing technologies, which are "picosecond laser forming machines used only for cutting, slitting, detecting and collecting lithium battery electrode sheets, processing electrode sheet strips, lacking tube adaptation structures, square / round tube switching, fixed-length positioning, and laser protection functions, and are all based on assembly line electrode sheet processing logic", this patent innovatively and non-obviously designs a dedicated clamping, positioning, cutting, and protection structure for rigid tubes, abandoning the assembly line processing mode of electrode sheets, realizing universal laser cutting of single square / round tubes, and solving the pain points specific to tube processing.

[0071] CN114905148A: Compared to the shortcomings of existing technologies, which are "dual-station PCB depaneling machine fume extraction systems, used only for extracting fumes from PCB cutting, without pipe processing, clamping, positioning, or cutting functions, and whose core is fume channel control, completely unrelated to the mechanical structure, precision control, and safety protection of pipe laser cutting", this patent innovatively and non-obviously focuses on the four core issues of pipe cutting: clamping compatibility, positioning accuracy, cutting stability, and safety protection, rather than fumes treatment for PCB processing. The technical direction and the problem solved are completely different.

[0072] CN115213555A: Compared to the shortcomings of existing technologies, which are "dual-station laser PCB splitting machines, only used for dual-station cutting of circuit boards, processing objects are PCB boards, using adsorption platforms for fixation, and lacking functions such as pipe clamping, square / round pipe switching, fixed length positioning, and partition hole protection, and cannot be adapted to three-dimensional pipe cutting", this patent innovatively and non-obviously adopts a mechanical hinge linkage clamping mechanism adapted to rigid pipes, integrating square / round pipe dual clamping heads, infrared precise positioning, dual-guide transmission cutting and safety protection structure, to achieve dedicated laser cutting of pipes, rather than circuit board splitting processing.

[0073] The following are the options selected for this patent; these selections are not intended to be limiting: Laser cutting head; Model: Baichu BLT421T Professional Pipe Cutting Type; Manufacturer: Shanghai Baichu Electronic Technology Co., Ltd. Applications: Suitable for cutting square / round tubes, ≤8kW, with built-in anti-explosion mirror and dustproof design, stable light output with the cutting edge facing downwards, straight cut and flat cross-section; Laser cutting head 7, dual-guide drive, cutting head with scale lines; Mobile motor (forward and reverse drive); Model: Lianyi Motor YN60-10 / 60JBXXG08; Manufacturer: Zhejiang Lianyi Motor Co., Ltd. Application: Forward and reverse rotation control, driving the threaded rod + optical rod dual guide mechanism, driving the moving block and laser cutting head to move left and right at a uniform speed, with precise positioning and smooth operation; The mobile motor 5 has a threaded rod as its power output shaft, forming a threaded pair. Pressing and pulling structure (telescopic cylinder); Model: Huade Hydraulics HSG40×25-100 Double-acting Hydraulic Cylinder; Manufacturer: Beijing Huade Hydraulic Industry Group Co., Ltd. Applications: Automated telescopic movement, driving the hinged body to rotate around the hinge point, realizing rapid switching between square tube / round tube clamping heads, adjustable clamping force, and stable operation; The clamping and pulling structure 8 is a telescopic cylinder structure with hinged installation. Infrared ranging device; Model: ST VL53L0X ToF Infrared Range Sensor; Manufacturer: STMicroelectronics; Application: Installed on the positioning push plate, it accurately detects the length of the pipe with an error of ±1mm, replacing manual marking and realizing fixed-length cutting; The ranging infrared device 22 has a distance between the two positioning push plates equal to the length of the pipe. Square tube clamping head; Material: 45# steel + surface hardening; Processing: The bottom surface is precision ground to a flatness of ≤0.02mm; Application: Used to press against the upper surface of a square tube, ensuring even force distribution without scratching or warping; Square tube clamping head 10; Round tube clamping head (arc-shaped elastic structure); Structure: Arc-shaped base + elastic stainless steel layer / wear-resistant rubber layer; Radius: Standard R series, suitable for common round pipe outer diameters; Applications: Flexible fit to the outer wall of round tubes, without being crushed, losing roundness, or scratching the anti-corrosion layer; 11. Round tube clamping head; 12. Arc-shaped part; Threaded rod + smooth rod (double guide drive); Model: Trapezoidal lead screw T16×4 + optical axis φ16h6; Manufacturer: HIWIN (Taiwan), China; Application: To form a dual-guide precision transmission, ensuring that the laser cutting head is free from jitter and deviation, and that the cutting trajectory is straight; Threaded rod, smooth rod, moving block 6; Pipe end positioning components; Slider: Linear guide slider HGH15CA; Manufacturer: HIWIN (Taiwan), China; Application: To move smoothly along a fixed track without jamming or offset, ensuring that the positioning push plate accurately presses against the pipe end face; Pipe end positioning component 2, fixed track 23; Locking bolts; Model: M8×25 socket head cap screw; Manufacturer: Dongming Hardware; Application: Passes through the fixed track and slider positioning hole, locks the positioning component, prevents vibration and displacement, and ensures consistent batch cutting length; Fixing holes and bolt locking structure; Main frame; Material: Q235B square tube, welded and integrally annealed; Process: The overall machining ensures a flatness of ≤0.05mm / m, and partition holes are opened (laser avoidance + molten slag removal); Application: Horizontal load-bearing pipes; the cutting position should be aligned with the partition hole to prevent laser burn-off and slag adhesion. Frame 1, partition hole; Cut the main body base; Material: HT250 cast iron; Craftsmanship: Precision machining throughout, with graduations, flush with the height of the frame; Application: To install the hinged main body and tighten the pull structure to ensure that the pipe is horizontal and without tilt, and that the cutting height is uniform; Cut the main body 3 and the base scale; IV. Control and auxiliary components (minimum system for automation); Motor driver; Model: BLDC-24V Forward / Reverse Drive; Applications: Controlling the forward and reverse rotation, speed adjustment, and limit switches of the moving motor to achieve precise positioning of the laser cutting head; Hydraulic solenoid valve; Model: Huade 4WE6D Solenoid Valve; Application: To control the extension and retraction of the telescopic cylinder, thereby automating the clamping / releasing process and linking it with the cutting action; Operation panel; Model: 7-inch industrial touchscreen; used to control telescopic rods, forward and reverse motors, and laser heads.

[0074] Applications: Set cutting length, speed, and starting point; display infrared ranging data; start the cutting process with one click. Suitable for both square and round tubes: Dual clamping heads integrated, telescopic cylinder driven rotation switching, no need to change clamps, quick adaptation; Precise positioning: ToF infrared ranging + scale reference + bolt locking, length error ≤ ±1mm; Stable cutting: Dual-guided drive + horizontal frame, the cutting head is vibration-free and the cut is straight; Safety features: rack partition holes, laser avoidance, automatic slag falling off, no burning of equipment, no sticking to pipes; Automation: The motor and hydraulic linkage eliminates the need for manual pipe handling and tightening, improving efficiency and safety.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A laser cutting device for pipe processing, characterized in that, The laser cutting device includes a frame (1), which has multiple partition holes. Pipes can be arranged on the frame, and the cutting position can be cut above the partition holes. The frame consists of two parts, with the cutting body (3) in the middle. The basic base of the cutting body (3) is hinged to the hinge body (4) via the hinge point (14). The base of the pressing and pulling structure (8) is also hinged to the basic base of the cutting body (3). The upper part of the pressing and pulling structure (8) is hinged to the pressing and pulling structure (8). The pressing and pulling structure (8) can pull the hinge body (4) to rotate around the hinge body (4). The hinge body (4) is a plate-shaped structure. A square tube clamping head (10) and a round tube clamping head (11) are arranged below the hinge body (4). The bottom of the square tube clamping head (10) is flat and can press against the upper end face of the square tube; the bottom of the round tube clamping head (11) is an arc-shaped part (12), which can press against the round tube; the arc-shaped part (12) is made of rubber or stainless steel. On both sides of the frame (1) are fixed rails (23), the fixed rails (23) contain multiple fixing holes, and also contain pipe end positioning components (2) that can move along the fixed rails (23); the pipe end positioning components (2) contain vertically arranged positioning push plates (21), and the positioning push plates (21) are arranged with ranging infrared devices (22), that is, the distance between the ranging infrared devices (22) arranged on the two positioning push plates (21) is the length of the pipe; The hinge body (4) includes a vertical plate perpendicular to the hinge body (4), and a moving motor (5) is arranged on the vertical plate. The moving motor (5) is a forward and reverse motor. The power output shaft of the moving motor (5) is a threaded rod. The threaded rod and the smooth rod form a threaded pair. It also includes a movable block (6) which is connected to a threaded rod via a threaded hole and a smooth rod via a smooth hole; A laser cutting head (7) is fixed on the moving block (6). The cutting edge of the laser cutting head (7) is arranged downwards. The laser cutting head (7) can move left and right along the threaded pair with the moving block (6).

2. The laser cutting device for pipe processing as described in claim 1, characterized in that, The fixed track (23) contains scales, and the basic base of the cutting body (3) and the two parts of the frame at both ends are in close contact; the basic base of the cutting body (3) is also arranged with scales.

3. The laser cutting device for pipe processing as described in claim 1, characterized in that, The base of the pipe end positioning component (2) contains two sliders that can move along a fixed track (23).

4. The laser cutting device for pipe processing as described in claim 3, characterized in that, Both the fixed track (23) and the slider of the pipe end positioning component (2) are provided with holes for bolts to pass through and thus fix the pipe end positioning component (2) relative to each other.

5. The laser cutting device for pipe processing as described in claim 1, characterized in that, The clamping and pulling structure (8) is a telescopic cylinder structure.

6. The laser cutting apparatus for pipe processing as described in claim 1, characterized in that, The arc-shaped portion (12) of the stainless steel layer can elastically compress the circular steel pipe.

7. The laser cutting apparatus for pipe processing as described in claim 1, characterized in that, The frame (1) is supported on the ground by outriggers, and the overall height of the frame (1) is consistent.

8. The laser cutting apparatus for pipe processing as described in claim 7, characterized in that, The cutting body (3) has the same overall height as the plane of the pipe and the entire frame (1).

9. The laser cutting apparatus for pipe processing as described in claim 1, characterized in that, The laser cutting head (7) has scale lines at the cutting head position.

10. A laser cutting method for pipe processing, characterized in that, Using the laser cutting apparatus for pipe processing according to any one of claims 1-9 includes the following steps: Pipe placement: Place the square tube (9) or round tube to be cut stably on the frame (1) so that the pipe is above the partition hole of the frame (1) and the cutting position is precisely aligned with the partition hole; End positioning: Move the pipe end positioning component (2) along the fixed track (23) to both ends of the pipe, press the positioning push plate (21) against the pipe end face, detect and confirm the pipe length through the ranging infrared device (22), and then lock the pipe end positioning component (2) to the fixed track (23) with bolts. Posture calibration: Confirm that the pipe bearing plane of the cutting body (3) is consistent with the overall height of the frame (1), and that the pipe is in a horizontal and untilted state; Square tube cutting: Tightening and fixing: Start the tightening and pulling structure (8) to push the hinge body (4) to rotate downward around the hinge point (14), so that the bottom of the plane of the square tube clamping head (10) tightly presses against the upper end face of the square tube (9) to achieve reliable clamping; Cutting preparation: Start the moving motor (5), and drive the moving block (6) to move along the light rod to position the laser cutting head (7) to the preset cutting starting point of the square tube (9); Perform cutting: Turn on the laser cutting head (7), drive the moving block (6) to move left and right at a constant speed by the forward and reverse rotation of the moving motor (5), and the laser cutting head (7) cuts the square tube (9) along a straight line. The cutting path passes above the partition hole of the frame (1); repeat the cutting until the cutting is completed. Cutting complete: Turn off the laser cutting head (7), reverse drive the clamping and pulling structure (8), lift the hinge body (4) and square tube clamping head (10), and take out the cut square tube (9). Round tube cutting: Pressing and fixing: Start the pressing and pulling structure (8), push the hinge body (4) to rotate downward around the hinge point (14), so that the arc part (12) of the round tube pressing head (11) fits against the outer wall of the round tube and is elastically pressed; Cutting preparation: Start the moving motor (5) and drive the moving block (6) to move the laser cutting head (7) to the preset cutting starting point of the round tube, ensuring that the cutting mouth of the laser cutting head (7) is facing down and aligned with the round tube; Perform cutting: Turn on the laser cutting head (7), and drive the moving block (6) to move at a constant speed by the moving motor (5). The laser cutting head (7) cuts along the axial direction of the round tube, and the cutting position is located above the partition hole of the frame (1). Repeat the cutting until the cutting is completed. Cutting complete: Turn off the laser cutting head (7), drive the clamping and pulling structure (8) to lift the hinge body (4), the arc part (12) loosens the round tube, and take out the cut round tube; Finishing and resetting: Turn off the moving motor (5) and the laser cutting head (7), clean up the cutting residue; loosen the positioning component (2) at the end of the pipe and reset it to the initial position to prepare for the next cutting operation.

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