Steel pipe laser cutting device

Abstract

The invention discloses a steel pipe laser cutting device which comprises a rack, laser cutting equipment, lifting workbenches and a limiting mechanism, the laser cutting equipment is assembled on the right side of the rack, the lifting workbenches are evenly arranged in the rack, the limiting mechanism is assembled on the left side of the rack, and telescopic hydraulic arms are assembled at the bottoms of the lifting workbenches through bolts; a belt type conveying device is assembled on the top of the lifting workbench, C-shaped bearing blocks are evenly arranged on the top of the belt type conveying device, a limiting support is assembled at the bottom of the belt type conveying device, and the output end of an air cylinder is connected with a square plate. The steel pipe laser cutting device is matched with a square plate structure driven by a bottom air cylinder, a steel pipe can be stably supported through a C-shaped bearing block, axial fine adjustment can be completed through an electric roller, it is ensured that the axis of the steel pipe and a laser head are accurately aligned before cutting, a three-dimensional positioning system is formed in cooperation with vertical movement of a lifting workbench, and the cutting efficiency is improved. And the clamping efficiency and the positioning precision are improved.

Description

Technical Field

[0001] The present invention relates to the field of steel pipe laser cutting devices, and particularly to a steel pipe laser cutting device. Background Art

[0002] In the field of steel pipe processing technology, laser cutting equipment, as a key device for achieving high-precision metal processing, its automation level and processing quality directly affect industrial production efficiency. Existing steel pipe laser cutting devices usually adopt a combined design of a split-type conveying mechanism and an independent adjustment component. During the process of steel pipe loading, positioning, and cutting process connection, there is generally a problem of insufficient structural coordination, resulting in the need for multiple manual interventions or step-by-step adjustments in the processing flow, and it is difficult to meet the requirements of modern manufacturing for fully automated operation of the entire process.

[0003] Traditional equipment mostly adopts a separated design of a fixed conveyor belt and an independent lifting mechanism in the conveying link. The height adjustment and axial positioning of the steel pipe need to be completed step by step, and it is easy to generate position deviation due to the accumulation of mechanical clearances. Its positioning system usually relies on the combination of a single-axis clamp and a two-dimensional adjustment platform. When facing steel pipes of different lengths, the clamping points need to be adjusted repeatedly, and it lacks the ability of spatial attitude compensation, resulting in low clamping efficiency and axis alignment error. In terms of the cutting execution module, conventional equipment can only achieve circular cutting at a fixed angle, and complex groove or bevel cutting paths need to be completed through multiple clamps, with insufficient processing continuity. In addition, the traditional conveying mechanism and the rigid support structure lack effective vibration suppression measures, and the impact of steel pipe conveying and the vibration of equipment operation will be directly transmitted to the cutting component, affecting the movement stability of the laser head and the quality of the cut surface formation. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present application provides a steel pipe laser cutting device to solve the above technical problems that the height adjustment and axial positioning of the steel pipe need to be completed step by step, and it is easy to generate position deviation due to the accumulation of mechanical clearances. Its positioning system usually relies on the combination of a single-axis clamp and a two-dimensional adjustment platform. When facing steel pipes of different lengths, the clamping points need to be adjusted repeatedly, and it lacks the ability of spatial attitude compensation, resulting in low clamping efficiency and axis alignment error. In terms of the cutting execution module, conventional equipment can only achieve circular cutting at a fixed angle, and complex groove or bevel cutting paths need to be completed through multiple clamps, with insufficient processing continuity. In addition, the conveying mechanism and the rigid support structure lack effective vibration suppression measures, and the impact of steel pipe conveying and the vibration of equipment operation will be directly transmitted to the cutting component, affecting the movement stability of the laser head and the quality of the cut surface formation.

[0005] To achieve the above object, the present application provides the following technical solutions: A steel pipe laser cutting device, comprising a frame, a laser cutting device, a lifting workbench and a limiting mechanism. The laser cutting device is assembled on the right side of the frame. The lifting workbench is evenly arranged inside the frame. The limiting mechanism is assembled on the left side of the frame. The bottom of the lifting workbench is assembled with a telescopic hydraulic arm through bolts. The top of the lifting workbench is assembled with a belt conveyor. The top of the belt conveyor is evenly provided with C-shaped load-bearing blocks. The bottom of the belt conveyor is assembled with a limiting bracket. The inner cavity of the limiting bracket is assembled with a cylinder. The output end of the cylinder is connected with a square plate. The left and right sides of the upper end surface of the square plate are respectively provided with a first electric roller and a second electric roller.

[0006] The limiting mechanism includes a three-axis electric moving platform. The output end of the three-axis electric moving platform is connected with a hydraulic rod. The output end of the hydraulic rod is connected with an electric claw.

[0007] The laser cutting device includes a cutting fixed frame. The top of the inner cavity of the cutting fixed frame is assembled with an electric linear slide rail platform module. The output end of the electric linear slide rail platform module is connected with a laser cutting machine. The inner cavity of the cutting fixed frame is assembled with a control module. The outside of the control module is connected with an electric turntable. The outside of the electric turntable is evenly provided with electric push rods.

[0008] Preferably, a guiding track groove is opened on the outside of the electric turntable. A track block is slidably connected in the inner cavity of the guiding track groove. The track block is connected with the electric push rod through bolts. The dovetail mortise and tenon structure of the guiding track groove and the track block ensures the straightness of the radial movement of the electric push rod. The rubber soft pad absorbs the radial clearance through compression deformation, so that the electric push rod maintains a repeat positioning accuracy of ±0.02 mm in high-frequency reciprocating motion.

[0009] Preferably, an annular groove is opened in the inner cavity of the electric turntable. A rubber pad is embedded in the inner cavity of the annular groove through glue. And a rubber soft pad is assembled on the outside of the guiding track groove. The rubber pad embedded in the annular groove eliminates the assembly clearance between the electric turntable and the cutting fixed frame through elastic pre-tightening force. The rubber soft pad on the outside of the guiding track groove provides buffering when the electric push rod expands and contracts, avoiding vibration noise generated by direct metal contact.

[0010] Preferably, a control device is assembled at the bottom of the three-axis electric moving platform. An infrared sensor is assembled outside the control device, and the control device is connected to the hydraulic rod through a wire. A rubber square pad is assembled outside the chuck of the electric gripper. A protective housing is assembled outside the hydraulic rod. The infrared sensor of the control device at the bottom of the three-axis electric moving platform adopts the binocular vision positioning principle, calculates the spatial coordinates of the steel pipe end face through the triangulation method, and the protective housing of the hydraulic rod adopts an aluminum alloy honeycomb structure, reducing the mass of the moving parts by 30% while meeting the stiffness requirements.

[0011] Preferably, a C-shaped groove is formed at the top of the C-shaped load-bearing block, and anti-slip lines are formed inside the groove. A shock-absorbing pad is assembled at the bottom of the C-shaped load-bearing block. The shock-absorbing pad is connected to the belt conveyor. A damping rod is assembled inside the belt conveyor. The anti-slip lines of the C-shaped load-bearing block adopt a diamond-shaped protrusion array structure, generating a mechanical biting effect when contacting the steel pipe. The bottom shock-absorbing pad reduces the vibration amplitude to less than 0.1 mm through the damping characteristics of the silicone material. The damping rod of the belt conveyor absorbs the impact energy during emergency braking to protect the transmission components from overload damage.

[0012] Preferably, there are at least two groups of the second electric rollers, which are respectively arranged at the front and back ends of the top of the square plate. Rubber sleeves are sleeved outside both the first electric roller and the second electric roller, and anti-slip lines are formed on the outside of the rubber sleeves. The second electric rollers adopt a double-station symmetric layout, and the Shore hardness of the rubber sleeves is 70A, avoiding pressing and damaging the surface of the steel pipe while providing sufficient friction. The rotational speed difference between the first electric roller and the second electric roller forms a torque difference to achieve precise control of the rotation angle of the steel pipe.

[0013] Preferably, guiding telescopic arms are connected to both the left and right sides of the bottom of the square plate. The second electric roller includes a telescopic hollow column, and a sub-arm is slidably connected to the inner cavity of the telescopic hollow column. The sub-arm and the telescopic hollow column are respectively connected to the square plate and the limit bracket. The guiding telescopic arm adopts a four-bar linkage mechanism design to maintain the levelness during the lifting process of the square plate. The telescopic hollow column of the second electric roller is self-locked through trapezoidal threads to prevent the roller position from shifting due to cutting vibration.

[0014] Preferably, a circulating cooling device is assembled at the top of the electric linear slide rail platform module, and a cooling water pipe is arranged at the output end of the circulating cooling device. The cooling water pipe is arranged outside the laser cutting machine. The circulating cooling device adopts a closed-loop circulation system, and the cooling water pipe is spirally wound along the nozzle of the laser cutting machine to control the temperature of the cutting area within 200 °C through forced convection, avoiding intergranular corrosion of materials such as stainless steel due to local overheating.

[0015] Preferably, reinforcing ribs are assembled on both outer sides of the three-axis electric moving platform through bolts, and the other ends of the reinforcing ribs are connected to the outside of the three-axis electric moving platform through bolts. The reinforcing ribs are made of carbon fiber composite material, and the cross-sectional shape is optimized through finite element analysis to suppress structural resonance during the high-speed movement of the three-axis electric moving platform, so that the platform positioning accuracy is maintained within the range of ±0.05 mm.

[0016] Preferably, there are at least two sets of lifting worktables, and the outer parts of the two sets of lifting worktables are respectively slidably arranged on the left and right sides of the front of the frame through sliders. The two sets of lifting worktables form a double-guide rail pair structure with the frame, and alternately lift during the cutting process to realize continuous operation of loading - cutting - unloading. The surface of the slider is plated with a hard chromium layer, which improves the wear resistance of the guide rail pair by more than 5 times.

[0017] In summary, the present application provides a steel pipe laser cutting device, which has the following beneficial effects: In this steel pipe laser cutting device, the lifting worktable adopts a combined design of hydraulic drive and belt conveyor equipment, so that the height adjustment of the steel pipe can be synchronized during the conveying process. Combined with the square plate structure driven by the bottom cylinder, it can not only stably support the steel pipe through the C-shaped load-bearing block, but also complete the axial fine adjustment by using the electric roller to ensure the accurate alignment of the axis of the steel pipe and the laser head before cutting.

[0018] In this steel pipe laser cutting device, the three-axis electric moving platform of the limiting mechanism is linked with the hydraulic rod, so that the electric gripper has the ability of six-degree-of-freedom adjustment in space, can automatically adapt to the end positioning requirements of steel pipes of different lengths, and forms a three-dimensional positioning system in cooperation with the vertical movement of the lifting worktable, improving the clamping efficiency and positioning accuracy.

[0019] In this steel pipe laser cutting device, the coordinated action of the electric turntable and the annularly distributed electric push rods in the laser cutting equipment enables the steel pipe to rotate continuously by 360 degrees during the cutting process. Combined with the linear slide rail module of the laser cutting machine, it not only ensures the smoothness of the annular cut, but also can complete complex cutting paths such as bevel cutting and grooving through program control to meet diverse processing requirements.

[0020] In this steel pipe laser cutting device, the combined design of the belt conveyor equipment and the shock-absorbing pad effectively buffers the impact of steel pipe conveying. Combined with the rigid support structure of the limiting bracket, while ensuring the smoothness of conveying, it reduces the influence of equipment vibration on the cutting accuracy. The overall scheme realizes the full-process automation operation from automatic loading, precise positioning to high-quality cutting through mechatronic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view of the present invention.

[0022] Figure 2 is the plan view of the present invention.

[0023] Figure 3 It is an external schematic diagram of the lifting workbench of the present invention.

[0024] Figure 4 It is an external schematic diagram of the limit mechanism of the present invention.

[0025] Figure 5 It is an external schematic diagram of the laser cutting equipment of the present invention.

[0026] Description of reference numerals: 1. Frame; 2. Laser cutting equipment; 21. Cutting fixing frame; 22. Control module; 23. Electric turntable; 24. Electric push rod; 25. Guide rail groove; 26. Electric linear slide rail platform module; 27. Laser cutting machine; 3. Lifting workbench; 31. Belt conveyor equipment; 32. Shock pad; 33. C-shaped load-bearing block; 34. Limit bracket; 35. Cylinder; 36. Square plate; 37. First electric roller; 38. Second electric roller; 39. Guide telescopic arm; 4. Limit mechanism; 41. Three-axis electric moving platform; 42. Control equipment; 43. Hydraulic rod; 44. Electric gripper; 45. Reinforcing rib; 5. Telescopic hydraulic arm. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] The present application provides a technical solution. Please refer to Figure 1 and Figure 2 , a steel pipe laser cutting device, including a frame 1, a laser cutting equipment 2, a lifting workbench 3 and a limit mechanism 4. The laser cutting equipment 2 is assembled on the right side of the frame 1, the lifting workbench 3 is evenly arranged inside the frame 1, and the limit mechanism 4 is assembled on the left side of the frame 1.

[0029] Please refer to Figure 3 , the lifting workbench 3 realizes the position adjustment in the vertical direction through the telescopic hydraulic arm 5. Its belt conveyor equipment 31 adopts a modular design. The arc structure of the C-shaped load-bearing block 33 matches the outer diameter of the steel pipe, and the vibration energy is absorbed through the bottom shock pad 32. When the cylinder 35 drives the square plate 36 to lift, the first electric roller 37 and the second electric roller 38 form a bidirectional clamping force, and combined with the elastic deformation characteristics of the rubber sleeve, the composite function of accurate axial positioning and rotation drive of the steel pipe can be realized.

[0030] The bottom of the lifting workbench 3 is assembled with a telescopic hydraulic arm 5 through bolts. The top of the lifting workbench 3 is assembled with a belt conveyor 31. C-shaped load-bearing blocks 33 are evenly arranged on the top of the belt conveyor 31. A limit bracket 34 is assembled at the bottom of the belt conveyor 31. A cylinder 35 is assembled in the inner cavity of the limit bracket 34. The output end of the cylinder 35 is connected with a square plate 36. A first electric roller 37 and a second electric roller 38 are respectively arranged on the left and right sides of the upper end surface of the square plate 36; The limiting mechanism 4 realizes six-degree-of-freedom adjustment in space through a three-axis electric moving platform 41. The hydraulic rod 43 and the electric gripper 44 form a rigid clamping system. Among them, the infrared sensor detects the position of the steel pipe end face in real time, and the control device 42 synchronously adjusts the extension amount of the hydraulic rod 43 according to the feedback signal. The rubber square pad compensates for the clamping error through deformation to ensure that the axis of the steel pipe is aligned with the optical path of the laser cutting machine 27.

[0031] Please refer to Figure 4 , the limiting mechanism 4 includes a three-axis electric moving platform 41. The output end of the three-axis electric moving platform 41 is connected with a hydraulic rod 43. The output end of the hydraulic rod 43 is connected with an electric gripper 44; The electric turntable 23 of the laser cutting device 2 realizes 360° continuous rotation through an annular groove structure. When the electric push rod 24 radially expands and contracts along the guiding track groove 25, the rubber soft pad forms a damping fit with the track block to prevent mechanical shocks generated by high-speed start and stop; the circulating cooling system carried by the laser cutting machine 27 controls the temperature of the cutting area below the material phase change temperature through forced convection heat transfer to avoid excessive expansion of the heat-affected zone.

[0032] Please refer to Figure 5 , the laser cutting device 2 includes a cutting fixed frame 21. An electric linear slide rail platform module 26 is assembled at the top of the inner cavity of the cutting fixed frame 21. The output end of the electric linear slide rail platform module 26 is connected with a laser cutting machine 27. A control module 22 is assembled in the inner cavity of the cutting fixed frame 21. An electric turntable 23 is externally connected to the control module 22. Electric push rods 24 are evenly arranged outside the electric turntable 23.

[0033] A guiding track groove 25 is opened outside the electric turntable 23. A track block is slidably connected in the inner cavity of the guiding track groove 25. The track block is connected with the electric push rod 24 through bolts. The dovetail mortise and tenon structure of the guiding track groove 25 and the track block ensures the straightness of the radial movement of the electric push rod 24. The rubber soft pad absorbs the radial clearance through compression deformation, so that the electric push rod 24 maintains a repeat positioning accuracy of ±0.02 mm in high-frequency reciprocating motion.

[0034] The inner cavity of the electric turntable 23 is provided with an annular groove. A rubber pad is embedded in the inner cavity of the annular groove through glue. And a rubber soft pad is assembled outside the guiding track groove 25. The rubber pad embedded in the annular groove eliminates the assembly gap between the electric turntable 23 and the cutting fixing frame 21 through elastic pre-tightening force. The rubber soft pad outside the guiding track groove 25 provides buffering when the electric push rod 24 expands and contracts, avoiding vibration noise generated by direct metal contact.

[0035] The bottom of the three-axis electric moving platform 41 is assembled with a control device 42. An infrared sensor is assembled outside the control device 42. And the control device 42 is connected to the hydraulic rod 43 through a circuit. A rubber square pad is assembled outside the chuck of the electric gripper 44. A protective housing is assembled outside the hydraulic rod 43. The infrared sensor of the control device 42 at the bottom of the three-axis electric moving platform 41 adopts the binocular vision positioning principle, and calculates the spatial coordinates of the steel pipe end face through the triangulation method. The protective housing of the hydraulic rod 43 adopts an aluminum alloy honeycomb structure, reducing the mass of the moving parts by 30% while meeting the stiffness requirements.

[0036] The top of the C-shaped load-bearing block 33 is provided with a C-shaped groove, and anti-slip lines are provided inside the groove. The bottom of the C-shaped load-bearing block 33 is assembled with a shock-absorbing pad 32. The shock-absorbing pad 32 is connected to the belt conveyor 31. A damping rod is assembled inside the belt conveyor 31. The anti-slip lines of the C-shaped load-bearing block 33 adopt a diamond-shaped protrusion array structure, generating a mechanical biting effect when contacting the steel pipe. The bottom shock-absorbing pad 32 reduces the vibration amplitude to less than 0.1 mm through the damping characteristics of the silicone material. The damping rod of the belt conveyor 31 absorbs impact energy during emergency braking, protecting the transmission components from overload damage.

[0037] There are at least two sets of second electric rollers 38, which are respectively arranged at the front and back ends of the top of the square plate 36. Rubber sleeves are sleeved outside both the first electric roller 37 and the second electric roller 38. Anti-slip lines are provided on the outside of the rubber sleeves. The second electric roller 38 adopts a double-station symmetric layout. The Shore hardness of the rubber sleeve is 70A, avoiding pressing the surface of the steel pipe while providing sufficient friction. The rotational speed difference between the first electric roller 37 and the second electric roller 38 forms a torque difference, realizing precise control of the rotation angle of the steel pipe.

[0038] Guiding telescopic arms 39 are connected to the left and right sides of the bottom of the square plate 36. The second electric roller 38 includes a telescopic hollow column. A sub-arm is slidably connected to the inner cavity of the telescopic hollow column. The sub-arm and the telescopic hollow column are respectively connected to the square plate 36 and the limit bracket 34. The guiding telescopic arm 39 adopts a four-bar linkage mechanism design, maintaining the levelness during the lifting process of the square plate 36. The telescopic hollow column of the second electric roller 38 is self-locked through trapezoidal threads, preventing the roller position from shifting due to cutting vibration.

[0039] A circulating cooling device is assembled on the top of the electric linear slide rail platform module 26, and a cooling water pipe is arranged at the output end of the circulating cooling device. The cooling water pipe is arranged outside the laser cutting machine 27. The circulating cooling device adopts a closed-loop circulation system. The cooling water pipe is spirally wound along the nozzle of the laser cutting machine 27 to control the temperature of the cutting area within 200 °C by forced convection, avoiding intergranular corrosion caused by local overheating of materials such as stainless steel.

[0040] Reinforcing ribs 45 are assembled on both outer sides of the three-axis electric moving platform 41 through bolts. The other ends of the reinforcing ribs 45 are connected to the outside of the three-axis electric moving platform 41 through bolts. The reinforcing ribs 45 are made of carbon fiber composite materials, and the cross-sectional shape is optimized through finite element analysis to suppress structural resonance during the high-speed movement of the three-axis electric moving platform 41, keeping the platform positioning accuracy within the range of ±0.05 mm.

[0041] There are at least two sets of lifting worktables 3. The two sets of lifting worktables 3 are respectively slidably arranged on the left and right sides of the front of the frame 1 through sliders. The two sets of lifting worktables 3 form a double-guide rail pair structure with the frame 1 and alternately lift during the cutting process to realize continuous operation of loading - cutting - unloading. The surface of the slider is plated with a hard chromium layer, increasing the wear resistance of the guide rail pair by more than 5 times.

[0042] The steel pipe is placed on the top of the shock-absorbing pad 32 and is conveyed to the top of the first electric roller 37 by the belt conveyor 31. Then, the whole lifting worktable 3 is driven to rise to lift the steel pipe. The first electric roller 37 and the second electric roller 38 drive the steel pipe to move into the inner cavity of the electric turntable 23, and the steel pipe is clamped and fixed by the electric push rod 24. Finally, the steel pipe is rotationally cut by the laser cutting machine 27.

[0043] The operator horizontally places the steel pipe to be processed on the top of the C-shaped load-bearing block 33 of the left lifting worktable 3 of the frame 1. The arc structure of the C-shaped load-bearing block 33 matches the outer diameter of the steel pipe. The diamond-shaped convex array anti-slip pattern on its surface fixes the steel pipe through mechanical biting effect. The bottom shock-absorbing pad 32 is made of silica gel material, and the amplitude of the placement impact vibration is reduced to less than 0.1 mm through damping characteristics. After the belt conveyor 31 is started, the modular designed conveyor belt realizes flexible start through the built-in damping rod and conveys the steel pipe into the frame 1. When the infrared sensor of the limit mechanism 4 detects that the end face of the steel pipe enters the action range, the control device 42 triggers the positioning program.

[0044] The three-axis electric moving platform 41 drives the movement of the hydraulic rod 43 through six-degree-of-freedom adjustment. The bottom control device 42 adopts the binocular vision positioning principle and calculates the spatial coordinates of the steel pipe end face by using the infrared sensor triangulation method. When the hydraulic rod 43 extends, the aluminum alloy honeycomb structure protection housing reduces the movement inertia. The rubber square pad of the electric gripper 44 contacts the steel pipe surface with a hardness of 70A, and compensates for the initial position error of ±0.5 mm through deformation. The clamping force forms a closed-loop control through the hydraulic system pressure feedback to ensure that the deviation between the axis of the steel pipe and the optical path axis of the laser cutting machine 27 is ≤0.1 mm.

[0045] The telescopic hydraulic arm 5 of the left lifting workbench 3 lifts the steel pipe to the cutting station through the double guide rail pair structure. The hard chromium plating on the slider surface improves the wear resistance of the guide rail pair by more than 5 times. When the steel pipe reaches the predetermined height, the cylinder 35 drives the square plate 36 to rise, and the rubber sleeves of the first electric roller 37 and the second electric roller 38 contact the steel pipe with a hardness of 70A. The double electric rollers generate torque through the speed difference, and the anti-slip patterns on the outside of the rubber sleeves enhance the friction force to achieve the precise rotation of the steel pipe by ±180°. The telescopic hollow column of the second electric roller 38 is self-locked by trapezoidal threads to prevent the roller position from shifting due to cutting vibration.

[0046] After the electric turntable 23 eliminates the assembly gap through the rubber pad in the annular groove, the three electric push rods 24 extend radially synchronously along the guide track groove 25. The dovetail tenon and mortise structure ensures the straightness of the push rod movement, and the rubber soft pad absorbs the radial gap of 0.05 mm through compression deformation. When the rubber soft pad at the end of the electric push rod 24 contacts the steel pipe, the pressure sensor triggers the locking signal to form a three-point positioning clamping system. At this time, the laser cutting machine 27 moves along the electric linear slide rail platform module 26 to the cutting starting point, and the circulating cooling equipment starts a closed-loop circulation. The cooling water pipe is wound spirally along the nozzle, and the temperature of the cutting area is controlled below 200 °C through forced convection.

[0047] The electric turntable 23 drives the steel pipe to rotate continuously by 360°, and the rotation speed range is adjustable from 0 to 300 rpm. During the cutting process, the laser cutting machine 27 performs X / Y axis linkage according to the preset pattern, and the cutting head realizes the focal length adjustment at the 0.01 mm level through the Z-axis servo motor. When cutting an inclined angle is required, the electric turntable 23 and the laser cutting machine 27 perform an interpolation movement, and the light spot is always kept perpendicular to the steel pipe surface through the space coordinate transformation algorithm. The molten slag generated by cutting is blown away from the workpiece by the forced air flow, and the cooling water takes away the local heat at the same time.

[0048] After the left lifting workbench 3 completes the feeding - cutting process, the right lifting workbench 3 moves to the cutting station along the guide rail through the slider. The two workbenches adopt an alternating working mode: when the left bench is discharging, the right bench synchronously completes the positioning and clamping of the new steel pipe. The modular design of the belt conveyor equipment 31 allows for the quick replacement of the C - shaped load - bearing block 33 to adapt to the processing requirements of different pipe diameters. The double - station switching time ≤ 5 s, and the overall equipment effectiveness (OEE) is increased to over 85%.

[0049] During the continuous operation process, the infrared sensor monitors the thermal deformation of the steel pipe in real - time, and controls the equipment 42 to fine - tune and compensate for the axial displacement through the hydraulic rod 43. The rubber soft pad of the electric push rod 24 is adjusted with a pre - tightening amount of 0.2 mm every 100 working hours to compensate for material creep. The carbon fiber reinforcing rib 45 of the three - axis electric moving platform 41 is optimized by finite element method to suppress the structural resonance generated during high - speed movement and ensure the repeat positioning accuracy of ±0.05 mm. The annular rubber pad of the cutting fixture 21 is replaced every 500 hours to maintain the effect of assembly gap compensation.

[0050] After cutting is completed, the left lifting workbench 3 descends to the discharging height, and the belt conveyor equipment 31 runs in reverse to send out the steel pipe. At this time, the circulating cooling system works continuously for 10 minutes to take away the residual heat in the cutting area through forced convection. The rubber square pad of the electric gripper 44 maintains a residual pressure of 0.5 MPa during the release process to prevent the steel pipe from accidentally falling. During the discharging process, the telescopic hollow column of the second electric roller 38 is self - locked by trapezoidal threads to maintain the position accuracy of the roller.

[0051] This device realizes the full - process automation of the steel pipe from feeding, positioning, cutting to discharging through multi - sensor fusion and mechatronic control, based on axis alignment by binocular vision, a hydraulic - electric composite clamping system, a 360° continuous rotation cutting mechanism, and a double - station alternating production mode. Each module works in coordination, enabling the equipment to achieve a production capacity of processing 200 steel pipes per single shift. The surface roughness Ra of the cutting section ≤ 3.2 μm, and the comprehensive positioning accuracy is 0.1 mm, meeting the high - precision processing requirements of oil pipes, automobile exhaust pipes, etc.

[0052] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0053] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A steel pipe laser cutting device, comprising a frame (1), a laser cutting device (2), a lifting workbench (3) and a limiting mechanism (4). The laser cutting device (2) is assembled on the right side of the frame (1), the lifting workbench (3) is uniformly arranged inside the frame (1), and the limiting mechanism (4) is assembled on the left side of the frame (1), characterized in that: The bottom of the lifting workbench (3) is assembled with a telescopic hydraulic arm (5) through bolts. The top of the lifting workbench (3) is assembled with a belt conveyor (31). C-shaped load-bearing blocks (33) are evenly arranged on the top of the belt conveyor (31). A limit bracket (34) is assembled at the bottom of the belt conveyor (31). A cylinder (35) is assembled in the inner cavity of the limit bracket (34). The output end of the cylinder (35) is connected with a square plate (36). A first electric roller (37) and a second electric roller (38) are respectively arranged on the left and right sides of the upper end surface of the square plate (36). The limiting mechanism (4) includes a three-axis electric moving platform (41). The output end of the three-axis electric moving platform (41) is connected with a hydraulic rod (43). The output end of the hydraulic rod (43) is connected with an electric gripper (44). The laser cutting device (2) includes a cutting fixing frame (21). An electric linear slide rail platform module (26) is assembled at the top of the inner cavity of the cutting fixing frame (21). The output end of the electric linear slide rail platform module (26) is connected with a laser cutting machine (27). A control module (22) is assembled in the inner cavity of the cutting fixing frame (21). An electric turntable (23) is connected to the outside of the control module (22). Electric push rods (24) are evenly arranged on the outside of the electric turntable (23).

2. The steel pipe laser cutting device according to claim 1, characterized in that: A guiding track groove (25) is formed on the outside of the electric turntable (23). A track block is slidably connected in the inner cavity of the guiding track groove (25). The track block is connected with the electric push rod (24) through bolts.

3. A steel pipe laser cutting device according to claim 1, characterized in that: An annular groove is formed in the inner cavity of the electric turntable (23). A rubber pad is embedded in the inner cavity of the annular groove through glue. And a rubber soft pad is assembled on the outside of the guiding track groove (25).

4. A steel pipe laser cutting device according to claim 1, characterized in that: A control device (42) is assembled at the bottom of the three-axis electric moving platform (41). An infrared sensor is assembled on the outside of the control device (42). And the control device (42) is connected with the hydraulic rod (43) through a circuit. A rubber square pad is assembled on the outside of the chuck of the electric gripper (44). A protective housing is assembled on the outside of the hydraulic rod (43).

5. A steel pipe laser cutting device according to claim 1, characterized in that: A C-shaped groove is formed on the top of the C-shaped load-bearing block (33). And anti-slip lines are formed inside the groove. A shock pad (32) is assembled at the bottom of the C-shaped load-bearing block (33). The shock pad (32) is connected with the belt conveyor (31). A damping rod is assembled inside the belt conveyor (31).

6. A steel pipe laser cutting device according to claim 1, characterized in that: There are at least two groups of the second electric rollers (38), and they are respectively arranged at the front and back ends of the top of the square plate (36). Rubber sleeves are sleeved on the outside of the first electric roller (37) and the second electric roller (38). Anti-slip lines are formed on the outside of the rubber sleeves.

7. A steel pipe laser cutting device according to claim 1, characterized in that: Guide telescopic arms (39) are respectively connected to the left and right sides of the bottom of the square plate (36). The second electric roller (38) includes a telescopic hollow column. A secondary arm is slidably connected in the inner cavity of the telescopic hollow column. The secondary arm and the telescopic hollow column are respectively connected with the square plate (36) and the limit bracket (34).

8. A steel pipe laser cutting device according to claim 1, characterized in that: A circulating cooling device is assembled on the top of the electric linear slide rail platform module (26), and a cooling water pipe is arranged at the output end of the circulating cooling device. The cooling water pipe is arranged outside the laser cutting machine (27).

9. A steel pipe laser cutting device according to claim 1, characterized in that: Reinforcing ribs (45) are assembled on both outer sides of the three-axis electric moving platform (41) through bolts, and the other ends of the reinforcing ribs (45) are connected to the outside of the three-axis electric moving platform (41) through bolts.

10. A steel pipe laser cutting device according to claim 1, characterized in that: There are at least two sets of lifting worktables (3), and the two sets of lifting worktables (3) are respectively arranged on the left and right sides of the front of the frame (1) through sliders in a sliding manner.

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