Cutting device for seat chassis pipe fitting

Abstract

The utility model provides a cutting device for a seat chassis pipe fitting, and relates to the technical field of pipe fitting cutting. The cutting mechanism is arranged on the base and is used for carrying out laser cutting on the continuously conveyed long steel pipe to obtain a single-section pipe fitting; the transferring mechanism is arranged at the bottom of the cutting mechanism, and is used for transferring the cut single-section pipe fitting from the cutting mechanism to a bending mechanism which is positioned at the downstream of the cutting mechanism and is used for bending and forming the end part of the single-section pipe fitting; the cutting mechanism comprises a clamping and fixing device used for clamping the two ends of the pipe fitting in the cutting process, and the pipe fitting is prevented from moving in the axial direction of the clamping and fixing device. The device effectively inhibits the pipe fitting movement caused by laser cutting blowing, ensures the in-place stability of the cut pipe fitting, improves the connection precision and reliability of cutting and bending procedures, supports full-automatic continuous production, and improves the production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of pipe cutting technology, specifically relating to a cutting device for seat chassis pipes. Background Technology

[0002] In the processing of seat chassis tubing, long steel pipes are often cut into single sections of fixed length, and then one end is bent into shape. Laser cutting technology is widely used for fixed-length cutting of such pipes due to its high cutting precision and good cut quality. However, in actual operation, laser cutting heads are usually equipped with high-pressure air blowing components to disperse molten slag and cool the cutting area during the cutting process. At the moment the cut is completed, this air blowing action will generate an axial impact force on the cut single section of tubing, causing it to move or shift unexpectedly.

[0003] In continuous and automated production scenarios, cut pipe fittings need to be precisely transferred to the downstream bending station for positioning. If the pipe fittings are displaced after cutting, it will not only affect the success rate of the transfer mechanism in grasping or accepting the fittings, but also lead to inaccurate placement of the pipe fittings in the bending die, resulting in problems such as bending curvature deviation and out-of-tolerance forming dimensions, which seriously affect the accuracy and consistency of the products. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, a cutting device for seat chassis tubes is provided, comprising:

[0005] Base;

[0006] A cutting mechanism, mounted on the base, is used to laser cut a continuously conveyed long steel pipe to obtain a single pipe section. The cutting mechanism includes a clamping and fixing device, which includes a cylinder assembly for clamping the single pipe section from both sides during cutting to prevent the pipe section from moving along its axial direction.

[0007] A transfer mechanism is provided at the bottom of the clamping and fixing device, and is used to transfer the cut single-section pipe fitting from the clamping and fixing device to the bending mechanism, which is located downstream of the clamping and fixing device;

[0008] The clamping and fixing device further includes:

[0009] A frame is fixed to the base, and a hollow area is formed within the frame;

[0010] The lifting drive module is fixedly installed on the top of the frame and includes a drive end that can freely extend and retract within the hollow area.

[0011] The guide section is connected to the drive end and located in the pipe conveying path, and is used to guide the pipe passing through; the guide section is provided with a clearance space, and the cylinder assembly clamps the pipe through the clearance space.

[0012] According to the technical solution provided in this application, the cutting mechanism includes:

[0013] A laser cutting head, located above the pipe, is used to perform cutting operations;

[0014] An air blowing assembly, connected to the laser cutting head, is used to blow away the cutting slag.

[0015] According to the technical solution provided in this application, the cylinder assembly includes a first cylinder and a second cylinder, which are located on both sides of the pipe and are arranged corresponding to the clearance space; the piston rods of the first cylinder and the second cylinder are arranged opposite to each other and are used to clamp the exposed pipe at the clearance space horizontally opposite each other during cutting.

[0016] According to the technical solution provided in this application, the transfer mechanism includes:

[0017] A slide cylinder is installed at the bottom of the frame, and the extension direction of its guide rod is the same as the pipe conveying direction.

[0018] The sliding head is slidably connected to the guide rod of the slide cylinder;

[0019] The protrusion is located at the top of the sliding head and extends into the clearance space;

[0020] Once the pipe is cut, the sliding head is driven by the slide cylinder to move along the guide rod, so that the protruding part abuts against one end of the cut single-section pipe and pushes the pipe to the forming station of the bending mechanism.

[0021] According to the technical solution provided in this application, the lifting drive module includes a lifting cylinder and an integrated mounting base driven by the lifting cylinder; the integrated mounting base passes through the hollow area of ​​the frame and is connected to the drive end of the lifting cylinder; the guide portion is mounted on the integrated mounting base.

[0022] According to the technical solution provided in this application, the guide portion includes:

[0023] Two sleeves are arranged along the conveying direction of the fitting and installed on the integrated mounting base. The inner diameter of the sleeves is larger than the outer diameter of the fitting so that the fitting can pass through.

[0024] According to the technical solution provided in this application, the guide part includes a sleeve with guide holes formed at both ends for the pipe to pass through. The sleeve has an opening in the middle for the piston rod of the cylinder assembly to pass through, and the bottom wall of the sleeve has a slit that runs through the pipe conveying direction for the extension of the transfer mechanism to pass through.

[0025] According to the technical solution provided in this application, a bracket is provided on each side of the outer wall of the sleeve; wherein, the cylinder bodies of the first cylinder and the second cylinder are respectively fixed on the corresponding brackets, and their piston rods face the pipe.

[0026] According to the technical solution provided in this application, the lifting drive module is used to drive the integrated mounting base and all components mounted thereon to switch between a first height and a second height; when at the first height, the whole is in a high position so that the laser cutting head can perform cutting operations; when at the second height, the whole is lowered to a low position so that the cut single-segment pipe falls into the pushing path of the transfer mechanism.

[0027] Compared with the prior art, the beneficial effects of this application are as follows:

[0028] I. Effectively suppresses pipe movement caused by air blowing during laser cutting, ensuring the stability of the pipe in place after cutting: By setting a clamping and fixing device in the cutting mechanism and reliably clamping both ends of the pipe during the cutting process (especially during the air blowing stage), the impact force of air blowing is fundamentally offset, preventing axial movement of the cut single section of pipe. This ensures that the pipe remains in the preset position after cutting, laying a solid foundation for subsequent automated transfer and precise positioning.

[0029] II. Enhancing the precision and reliability of the connection between cutting and bending processes: The stable positioning of the cut pipe fittings allows the transfer mechanism to accurately and reliably grasp or accept the fittings and precisely transfer them to the forming station of the bending mechanism. Combined with the lateral limiting function of the bending mechanism itself, precise positioning is achieved throughout the entire process from cutting and transfer to bending, significantly improving the consistency and pass rate of product forming dimensions.

[0030] 3. Supports fully automated continuous production and improves production efficiency: By integrating cutting and fixing, automatic transfer and precision bending functions, the device realizes continuous operation without human intervention, eliminating manual adjustment or production interruption caused by pipe movement in the traditional method, and significantly improving production cycle and equipment utilization.

[0031] IV. Compact structure and high degree of functional integration: The functions of clamping and fixing, laser cutting, pipe transfer and bending are integrated on the same base. Automatic connection between processes is achieved through mechanical and pneumatic linkage, which not only saves equipment space, but also reduces the cumulative error caused by multiple positioning and improves the overall reliability of the system. Attached Figure Description

[0032] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0033] Figure 1 A schematic diagram of the cutting device for seat chassis tubing provided in this application;

[0034] Figure 2 A schematic diagram of the clamping and fixing device provided in this application;

[0035] Figure 3 A schematic diagram of the structure after the laser cutting head is installed, as provided in this application;

[0036] Figure 4 A side view diagram of the structure after the laser cutting head is installed, as provided in this application;

[0037] The text labels in the image represent:

[0038] 1. Base; 21. First slide rail; 22. First mounting base; 23. First drive device; 24. Second slide rail; 25. Second mounting base; 26. Second drive device; 27. Laser cutting head; 3. Transfer mechanism; 31. Guide rod; 32. Sliding head; 33. Extension part; 4. Clamping and fixing device; 41. Frame; 42. Integrated tube sleeve; 43. Lifting drive module; 44. Sleeve; 45. Sub-frame; 46. Integrated mounting base; 5. Mounting plate. Detailed Implementation

[0039] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] As mentioned in the background section, this application proposes a cutting device for seat chassis tubing, such as... Figure 1 and Figure 2 As shown, it includes:

[0042] Base 1;

[0043] A cutting mechanism, mounted on the base 1, is used to laser cut a continuously conveyed long steel pipe to obtain a single pipe section.

[0044] The cutting mechanism includes a clamping and fixing device 4, which includes a cylinder assembly for clamping the pipe from both sides of the single-segment pipe during cutting to prevent the pipe from moving along its axial direction.

[0045] The transfer mechanism 3 is located at the bottom of the clamping and fixing device 4 and is used to transfer the cut single-section pipe fitting from the clamping and fixing device to the bending mechanism, which is located downstream of the clamping and fixing device 4.

[0046] The clamping and fixing device 4 further includes:

[0047] Frame 41 is fixed to the base 1, and a hollow area is formed inside the frame 41;

[0048] The lifting drive module 43 is fixedly installed on the top of the frame 41 and includes a drive end that can freely extend and retract within the hollow area.

[0049] The guide section is connected to the drive end and located in the pipe conveying path, and is used to guide the pipe passing through; the guide section is provided with a clearance space, and the cylinder assembly clamps the pipe through the clearance space.

[0050] Specifically, the core task of this device is to precisely cut continuously conveyed long steel pipes into single-section pipe fittings and provide stable and accurately positioned blanks for subsequent bending processes. The technical problem it solves is how to prevent the cut pipe fittings from unexpectedly shifting due to the process itself (air blowing), thereby ensuring the continuity and precision of automated production.

[0051] The device mainly consists of three functional modules: base 1, cutting mechanism, and transfer mechanism 3. Base 1 is the mechanical foundation and installation platform of the entire device. It is usually made of thick steel plates or structural steel welded or bolted together. It has sufficient mass, rigidity, and stability to support and fix all moving parts and functional units, and absorb the vibration and impact generated during processing to ensure overall accuracy.

[0052] The core function of the cutting mechanism is to use a high-energy laser beam to cut a continuously fed long metal tube to a fixed length. In this embodiment, the cutting mechanism not only performs the cutting action but also integrates a crucial clamping and fixing device 4. This device applies mechanical constraint forces to the opposite sides of the tube during the laser cutting operation. The specific technical problem it solves is that the laser cutting head 27 typically integrates a high-pressure air nozzle for blowing away molten slag and cooling the cut. At the moment the cutting is complete and the tube is completely severed, this continuous airflow creates an impact force along the tube axis on the separated single-segment tube, easily causing axial displacement of that segment. In an automated production line, this displacement is catastrophic, leading to misalignment in subsequent transport and positioning, ultimately causing the workpiece to be misplaced in the bending die, severely affecting product forming accuracy. The clamping and fixing device 4 of this device actively locks the tube during cutting, using mechanical clamping force to directly counteract and offset the impact force of the airflow, thereby ensuring that the cut tube remains stably in its original preset position, providing a reliable starting point for the next process.

[0053] The transfer mechanism 3 is located at the bottom of the clamping and fixing device 4. Its function is to automatically transfer the single-segment pipe from the cutting station after the cutting process is completed and the pipe is stabilized, and then transport it to the downstream bending mechanism. The bending mechanism is a subsequent processing device independent of the cutting device, used to bend and shape the ends of the pipe. The transfer mechanism 3 acts as a connecting bridge, realizing automated material flow between the two independent workstations of cutting and bending.

[0054] The technical solution of this embodiment effectively overcomes the persistent problem of pipe displacement in automated laser cutting by integrating stable cutting and automatic transfer, especially by introducing an active clamping and fixing function in the cutting process. Its technical effects are reflected in significantly improved production cycle stability, guaranteed positioning accuracy between processes, and fundamentally enhanced dimensional consistency of the final bent products. The technical principle lies in adding a controlled and powerful mechanical constraint element to construct a dynamic balance system at the critical process moment (the moment of cutting), actively counteracting the inherent interference forces of the process, thereby transforming the production process from an open-loop system into a closed-loop controllable system.

[0055] Furthermore, the cutting mechanism includes:

[0056] The laser cutting head 27 is located above the pipe and is used to perform cutting operations;

[0057] An air blowing assembly, connected to the laser cutting head 27, is used to blow away the cutting slag.

[0058] Specifically, the cutting mechanism consists of three subsystems working together: a laser cutting head 27, an air blowing assembly, and a clamping and fixing device 4 including a cylinder assembly. A feed plate is vertically mounted on the base 1, and the feed plate has feed holes for penetrating pipes. For example... Figures 3-4 As shown, the cutting mechanism also includes a mounting mechanism, which is located on the feed plate and above the feed hole. The mounting mechanism is used to mount the laser cutting head 27 and the air blowing assembly, and to drive the laser cutting head 27 and the air blowing assembly to move freely. The mounting mechanism includes a horizontally arranged first slide rail 21, on which a first mounting base 22 is slidably connected, and one end of the first slide rail 21 is provided with a first driving device 23. The first driving device 23 is used to drive the first mounting base 22 to move along the first slide rail 21. A vertically arranged second slide rail 24 is mounted on the first mounting base 22, on which a second mounting base 25 is slidably connected, and one end of the second slide rail 24 is provided with a second driving device 26. The second driving device 26 is used to drive the second mounting base 25 to move along the second slide rail 24. The laser cutting head 27 and the air blowing assembly are mounted on the second mounting base 25. Through the cooperation of the first driving device 23 and the second driving device 26, the laser cutting head 27 and the air blowing assembly can move freely in a two-dimensional plane. The first driving device 23 and the second driving device 26 can be selected as a cylinder, motor, or other driving mechanism.

[0059] The laser cutting head 27 is the core component for material separation. It emits a focused, high-power-density laser beam that irradiates the surface of the pipe, causing the local material to melt and vaporize rapidly. The control system guides the beam along a predetermined path to complete the cutting. Laser cutting, with its non-contact, high-precision, and flexible characteristics, is very suitable as the cutting method for this device.

[0060] The air blowing assembly is typically integrated with the laser cutting head 27 or tightly connected via piping; in this embodiment, the air blowing assembly is integrated onto the laser cutting head 27, meaning the air blowing assembly and the laser cutting head 27 are a single unit. Its main function is to coaxially eject a high-speed airflow (commonly oxygen, nitrogen, or compressed air) into the laser irradiation area. This process serves multiple purposes: firstly, it promptly and forcefully blows away molten metal oxides and residues generated during the cutting process from the kerf, preventing them from re-condensing and adhering, thus ensuring a clean, smooth, and perpendicular cut; secondly, the airflow has a cooling effect on the cutting area, helping to reduce the heat-affected zone; furthermore, when using combustion-supporting gases such as oxygen, it can improve cutting efficiency through exothermic reactions. However, as mentioned earlier, this necessary air blowing action is precisely the direct cause of movement in the cut pipe.

[0061] To fundamentally solve this problem, the specific form of the clamping and fixing device 4 is defined: it includes cylinder assemblies located at both radial ends of the pipe. Cylinder assemblies are linear actuators widely used in industrial automation, using compressed air to drive piston rods to generate linear motion. In this embodiment, a cylinder assembly includes two symmetrically arranged cylinders, located on both sides of the pipe segment to be cut. Its working logic is as follows: before the laser cutting head 27 begins operation, or at least before the cutting is completed and the air impact occurs, the control system issues a command to drive the piston rods of the two cylinders to move synchronously towards each other, firmly clamping the outer wall of the pipe located in the cutting area from both sides. At this time, the pipe is subjected to a pair of radial clamping forces of equal magnitude and opposite direction. When the laser cutting is completed and the air impact force acts on the single pipe segment, since the pipe has been rigidly clamped from both sides by the cylinder assembly, its tendency to move axially is effectively suppressed by a large static friction force. The design of this clamping force needs to be calculated and adjusted to ensure that the maximum static friction force generated is always greater than the maximum axial impact force that the air blower may cause, thereby achieving reliable locking.

[0062] Specifically, the clamping and fixing device 4 includes a frame 41 and a lifting drive module 43. The frame 41 is the main supporting structure of the entire clamping and fixing device 4, and it is firmly installed on the base 1 by anchor bolts, welding, or other rigid connection methods. The frame 41 has a hollow area inside, providing operating space for internal moving parts and creating an interference-free operating window for mechanical clamping, while achieving lightweight while ensuring the rigidity of the overall structure. The lifting drive module 43 is fixedly installed on the top of the frame 41, and its core function is to drive the components installed on it to lift as a whole through the extension and retraction of the drive end.

[0063] Furthermore, the cylinder body of the lifting cylinder of the lifting drive module 43 is connected to the frame 41 via a mounting plate 5. The mounting plate 5 is a plate-shaped structure, with its surface perpendicular to the axis of the lifting cylinder. The top of the frame 41 has an opening, and the mounting plate 5 is positioned corresponding to this opening, with its lower surface parallel to and tightly fitted to the top surface of the frame 41. Typically, the mounting plate 5 is fixedly connected to the top surface of the frame 41 using multiple bolts or screws. In this way, the lifting cylinder is securely "suspended" or "mounted" on the top of the frame 41 via the mounting plate 5.

[0064] In a preferred embodiment, the cylinder assembly includes a first cylinder and a second cylinder, which are located on both sides of the pipe and are arranged corresponding to the clearance space; the piston rods of the first cylinder and the second cylinder are arranged opposite to each other and are used to clamp the exposed pipe at the clearance space horizontally opposite each other during cutting.

[0065] Specifically, the cylinder assembly includes two independently driven actuators: a first cylinder and a second cylinder. They are mounted radially on opposite sides of the tube, with the cylinder bodies (fixed portions) of both cylinders mounted on the lifting drive module 43, respectively, on either side of the clearance space. Their mounting axes, i.e., the direction of piston rod movement, are set to be parallel to the radial direction of the tube, and the axes of the two cylinders should be kept as collinear as possible or precisely aligned.

[0066] The piston rods of the first and second cylinders are positioned relative to each other. This is a key mechanical configuration for achieving the clamping action: when clamping the pipe fitting is required, both cylinders receive a control signal, and their piston rods extend synchronously from their respective cylinder bodies towards the center of the clearance space; when releasing is required, the piston rods retract synchronously. The ends of the piston rods are usually fitted with chucks such as arc-shaped pads to increase the contact area and friction with the outer wall of the pipe fitting, while preventing damage to the pipe fitting surface.

[0067] The technical advantages of this implementation are as follows: First, the clamping force acts directly on the target pipe section (the exposed section within the clearance space) that requires stability, resulting in the shortest force transmission path, no intermediate losses, rapid response, and precise control. Second, the horizontally opposed clamping method ensures that the clamping force is self-balanced, preventing additional overturning torque or unexpected translation of the pipe. The pipe is only uniformly compressed radially, maintaining a highly stable posture.

[0068] In a preferred embodiment, the transfer mechanism 3 includes:

[0069] The slide cylinder is installed at the bottom of the frame 41, and the extension direction of its guide rod 31 is the same as the pipe conveying direction.

[0070] The sliding head 32 is slidably connected to the guide rod 31 of the slide cylinder;

[0071] The protrusion 33 is provided at the top of the sliding head 32 and extends toward the hollow region;

[0072] Once the pipe is cut, the sliding head 32 is driven by the slide cylinder to move along the guide rod 31, so that the protruding part 33 abuts against one end of the cut single-section pipe and pushes the pipe to the forming station of the bending mechanism.

[0073] Specifically, the transfer mechanism 3 mainly comprises three components: a slide cylinder, a sliding head 32, and an extension 33. The slide cylinder, serving as the drive source, is mounted at the bottom of the frame 41. Specifically, it is fixed below the frame 41, which constitutes the main body of the cutting mechanism, or on the bottom crossbeam. The extension direction of the guide rod 31 of the slide cylinder is the same as the pipe conveying direction. This means that the axis of motion of the transfer mechanism 3 is parallel to the feed axis of the pipe within the device before it is cut. The most direct advantage of this layout is that it saves lateral space in the device, making the structure more compact, and the transfer path naturally connects with the receiving direction of the subsequent bending mechanism.

[0074] The sliding head 32 is the actuating component of the slide cylinder. It forms a sliding pair with the guide rod 31 (usually connected by a linear bearing or bushing), and can perform precise and smooth linear reciprocating motion along the pipe conveying direction on the guide rod 31. The sliding head 32 is driven by a piston inside the slide cylinder, and its movement speed and stroke can be controlled by air pressure and electrical signals.

[0075] The protrusion 33 is the component that directly interacts with the workpiece. It is located on top of the sliding head 32 and extends from the body of the sliding head 32 into the hollow region. The top of the protrusion 33 can be aligned with the end face of the single-section pipe fitting; when transfer is required, the protrusion 33 can push the end of the pipe fitting. Its design height and length are precisely calculated to ensure that when the sliding head 32 is in the initial (rear position), the protrusion 33 will not interfere with the cutting and clamping actions; when transfer is required, the protrusion 33 can be precisely aligned with the single-section pipe fitting.

[0076] In a preferred embodiment, the lifting drive module 43 includes a lifting cylinder and an integrated mounting base 46 driven by the lifting cylinder; the integrated mounting base 46 passes through the hollow area of ​​the frame 41 and is connected to the drive end of the lifting cylinder; the guide portion is mounted on the integrated mounting base 46.

[0077] Furthermore, the guide portion includes a sleeve 44, with guide holes formed at both ends for the pipe to pass through. The sleeve 44 has an opening (i.e., clearance space) in the middle for the piston rod of the cylinder assembly to pass through, and the bottom wall of the sleeve 44 has a through gap along the pipe conveying direction for the extension portion 33 of the transfer mechanism 3 to pass through.

[0078] Specifically, regarding the implementation of the integral sleeve 44: the guide portion is a one-piece molded sleeve 44 structure. This sleeve 44 is fixedly mounted on the integrated mounting base 46. Its structural features include: each end of the sleeve 44 includes an integral sleeve portion 42, each integral sleeve portion 42 having a corresponding guide hole, serving as a sleeve function for the pipe fitting to pass through, ensuring the coaxiality and stability of the pipe fitting's axial movement. In the middle portion of the sleeve 44, corresponding to the clearance space area, windows or openings are provided on its sidewalls (usually radially on both sides). These openings allow the piston rods of the cylinder assemblies (first cylinder and second cylinder) to pass through, thereby enabling direct clamping of the pipe fitting located in this area inside the sleeve 44. The bottom wall of the sleeve 44 has a slit extending along the pipe fitting conveying direction (i.e., axial direction). This slit extends from one end of the sleeve to the other, and its width allows the extension portion 33 of the transfer mechanism 3 to extend upward into the inner cavity of the sleeve 44 and move along the length of this slit. When the lifting drive module 43 lowers the sleeve 44 and integrated mounting base 46 to the low position (transfer preparation position), the extension 33 of the transfer mechanism 3 can push the end of the cut and separated single pipe section through the gap at the bottom, push it out horizontally from the sleeve 44, and transfer it to the downstream bending mechanism. The gap structure provides necessary clearance for the movement path of the extension 33, ensuring the smooth progress of the transfer action.

[0079] Furthermore, the guide portion includes two sleeves, which are arranged along the conveying direction of the pipe fitting and mounted on the integrated mounting base 46. The inner diameter of the sleeves is larger than the outer diameter of the pipe fitting so that the pipe fitting can pass through.

[0080] Specifically, regarding the implementation of the two sleeves (not shown in the illustrations): In this embodiment, the guide part adopts a split design, specifically including two independent sleeves. These two sleeves are respectively fixedly installed at the front and rear ends of the integrated mounting base 46 along the pipe conveying direction (i.e., axial direction). Each sleeve has a through hole at its center, the inner diameter of which is slightly larger than the outer diameter of the steel pipe to be processed, so that the long steel pipe can smoothly pass through the two sleeves in sequence, realizing radial positioning and guidance during the conveying process. The gap area between the two sleeves, that is, the part on the integrated mounting base 46 located in the hollow area of ​​the frame 41, naturally forms a clearance space. The pipe is exposed in this area, providing space for clamping and transfer operations. The piston rod of the cylinder assembly (first cylinder and second cylinder) extends horizontally into this clearance space from both radial sides, acting on the exposed pipe wall for clamping. It should be further noted that in this embodiment, the split frame 45 is directly installed on the integrated mounting base 46. Except for the above differences, the other structures are the same as those in the embodiment of the integral sleeve 44.

[0081] Specifically, the lifting cylinder is a linear actuator, and its cylinder body is typically securely fixed to the top beam or side wall of the frame 41 via a mounting plate 5 or bracket. The piston rod of the lifting cylinder extends vertically downward (or upward), and its stroke is precisely designed to meet the switching requirements between the first and second heights. The start-up, stop, speed, and intermediate position stopping of the lifting cylinder are typically controlled by a solenoid valve and a position sensor to achieve precise positioning.

[0082] The integrated mounting base 46 is the core platform and mechanical skeleton driven by the piston rod of the lifting cylinder and supporting all related functional components. It is a rigid structural component, usually machined from steel plates or aluminum profiles, and its design must ensure that it does not deform or vibrate during lifting. It is installed within the hollow structure of the frame 41. This means that an appropriate gap is maintained between the outer contour of the integrated mounting base 46 and the inner wall of the hollow cavity of the frame 41, allowing it to slide freely up and down within the cavity without interference.

[0083] In a preferred embodiment, a bracket 45 is provided on each side of the outer wall of the sleeve 44; wherein the cylinder bodies of the first cylinder and the second cylinder are respectively fixed on the corresponding bracket 45, and their piston rods face the pipe.

[0084] Specifically, to ensure stable installation of the cylinders, two brackets 45 are symmetrically arranged radially on both sides of the outer wall of the sleeve 44. These two brackets 45 can be integrally cast with the sleeve 44, or they can be independent components welded later or connected by fasteners. They extend outward from the sleeve 44, forming a stable mounting platform. The cylinder bodies of the first and second cylinders are directly fixed to their respective brackets 45. Their piston rods are horizontally opposed, precisely pointing towards the exposed pipe fitting in the hollow area. When clamping is required, the piston rods on both sides extend towards the center simultaneously, pressing the pipe fitting.

[0085] In a preferred embodiment, the lifting drive module 43 is used to drive the integrated mounting base 46 and all components mounted thereon to switch between a first height and a second height; when at the first height, the whole assembly is in a high position so that the laser cutting head 27 can perform cutting operations; when at the second height, the whole assembly is lowered to a low position so that the cut single-segment pipe falls into the pushing path of the transfer mechanism 3.

[0086] Furthermore, the first height is the cutting and clamping station, and the second height is the transfer preparation station.

[0087] Specifically, the core function of the lifting drive module 43 is to drive the integrated mounting base 46 and all components mounted on it to switch between a first height and a second height. Here, "integrated" refers to the entire mechanical assembly connected by the piston rod of the lifting cylinder, including the integrated mounting base 46, sleeve 44, two sub-frames 45, the first cylinder, the second cylinder, and all connecting parts and sensors. This entire assembly moves collaboratively as a rigid unit under the drive of the lifting cylinder.

[0088] The first height is defined as the high position. When the entire system is at this height, it is the station where it performs its core processing tasks. At this time, the laser cutting head 27 is located above the part of the pipe to be cut, the pipe passes through the sleeve 44 at the high position, and is stabilized by a cylinder that may be in a clamping state. This height is precisely calibrated to ensure that the laser focus falls on the correct position on the surface of the pipe, thereby facilitating the laser cutting head 27 to perform the cutting operation. At the first height, the entire system is in a "processing-ready" state.

[0089] The second height is defined as the low position. After the cutting operation is completed, the control system instructs the lifting cylinder to drive the entire assembly to descend to this position. The purpose of descending to the low position is directly to serve the next process: to allow the cut single-segment pipe to fall into the pushing path of the transfer mechanism 3. Its working principle is as follows: when the entire assembly descends, the outer sleeve 44 of the pipe also descends. Since the pipe has been cut, at this time, the vertical position of the pipe is lowered, and it also becomes free in the horizontal direction due to the release of constraints. Its end is aligned with the extension 33 of the transfer mechanism 3 in the standby state, and is in a state that can be pushed.

[0090] In a preferred embodiment, the lifting and lowering movement of the lifting drive module 43, the cutting action of the laser cutting head 27, the clamping action of the cylinder assembly, and the conveying action of the conveying mechanism 3 are controlled by the control system in a time-series linkage.

[0091] Specifically, time-sequential control means that these actions have strict temporal order and conditional dependencies. A typical work cycle sequence might be as follows:

[0092] Initial state: The integrated unit is located at the first height (cutting and clamping station), the clamping cylinder assembly is in the released state, and the sliding head 32 and the extension 33 of the transfer mechanism 3 retract to the initial position.

[0093] Pipe feeding: The long steel pipe smoothly passes through the inner hole of the two pipe sleeves along the axial direction until the part to be cut is below the laser cutting head 27.

[0094] Clamping and Cutting: The control system commands the clamping cylinder assembly to clamp the pipe from both sides. Then, the laser cutting head 27 is activated to perform a fixed-length cutting operation.

[0095] Lowering and Transfer Preparation: After cutting, the clamping cylinder assembly is released. The control system instructs the lifting drive module 43 to lower the integrated unit to the second height (transfer preparation station). At this time, due to the decrease in height, the end of the cut single pipe section falls into the push position corresponding to the extension 33 of the transfer mechanism 3.

[0096] Execution of transfer: The control system drives the transfer mechanism 3 to move, and the extension 33 pushes the single pipe section forward to transfer it to the downstream bending mechanism;

[0097] Cyclic Reset: After the transfer is completed, the transfer mechanism 3 returns to the initial position and waits for the next cycle to begin.

[0098] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A cutting device for seat pan tubing, characterized by, The utility model relates to a laser cutting device for long steel pipe, comprising: a base (1); a cutting mechanism arranged on the base (1) and used for laser cutting a continuously conveyed long steel pipe to obtain a single-section pipe; the cutting mechanism comprises a clamping and fixing device (4) comprising a cylinder assembly, which is used for clamping the pipe from both sides of the single-section pipe during cutting to prevent the pipe from moving along its axial direction; a transfer mechanism (3) arranged at the bottom of the clamping and fixing device (4) and used for transferring the single-section pipe after cutting from the clamping and fixing device to a bending mechanism, which is located downstream of the clamping and fixing device (4); the clamping and fixing device (4) further comprises: a frame (41) fixed to the base (1), wherein a hollow region is formed in the frame (41); a lifting drive module (43) fixedly installed at the top of the frame (41) and comprising a drive end freely retractable in the hollow region; a guide part connected with the drive end and located in a pipe conveying path, which is used for guiding the pipe passing through; the guide part is correspondingly provided with a clearance space, and the cylinder assembly clamps the pipe through the clearance space.

2. The cutting apparatus for seat pan tubing according to claim 1, wherein, the cutting mechanism comprises: a laser cutting head (27) located above the pipe and used for performing cutting work; a blowing assembly connected with the laser cutting head (27) and used for blowing away cutting slag.

3. The cutting apparatus for seat pan tubing of claim 2, wherein, the cylinder assembly comprises a first cylinder and a second cylinder, which are respectively located at both sides of the pipe and correspondingly arranged at the clearance space; the piston rods of the first cylinder and the second cylinder are oppositely arranged, which are used for horizontally clamping the exposed pipe at the clearance space during cutting.

4. The cutting apparatus for seat pan tubing of claim 2, wherein, the transfer mechanism (3) comprises: a sliding table cylinder installed at the bottom of the frame (41), wherein the extension direction of the guide rod (31) of the sliding table cylinder is the same as the conveying direction of the pipe; a sliding head (32) slidingly connected with the guide rod (31) of the sliding table cylinder; an extension part (33) arranged at the top of the sliding head (32) and extending towards the hollow region; when the pipe cutting is completed, the sliding head (32) is driven by the sliding table cylinder to move along the guide rod (31) to drive the extension part (33) to abut against one end of the single-section pipe after cutting and push the pipe to move to a forming station of the bending mechanism.

5. The cutting apparatus for seat pan tubing of claim 3, wherein, the lifting drive module (43) comprises a lifting cylinder and an integrated mounting seat (46) driven by the lifting cylinder; the integrated mounting seat (46) is arranged in the hollow region of the frame (41) and connected with the drive end of the lifting cylinder; the guide part is mounted on the integrated mounting seat (46).

6. The cutting apparatus for seat pan tubing of claim 5, wherein, the guide part comprises two pipe sleeves arranged in the conveying direction of the pipe and mounted on the integrated mounting seat (46), wherein the inner diameter of the pipe sleeve is greater than the outer diameter of the pipe to allow the pipe to pass through.

7. The cutting apparatus for seat pan tubing of claim 5, wherein, The guide part comprises a sleeve (44) having guide holes at both ends for the pipe to pass through, and an opening in the middle for the piston rod of the cylinder assembly to pass through, and a slit in the bottom wall of the sleeve (44) for the extension (33) of the transfer mechanism (3) to pass through.

8. The cutting apparatus for seat pan tubing of claim 7, wherein, The outer wall of the sleeve (44) is provided with a sub-frame (45) on both sides; wherein the cylinder bodies of the first and second cylinders are fixed on the corresponding sub-frames (45), and the piston rods thereof are directed towards the pipe.

9. The cutting apparatus for seat pan tubing of claim 5, wherein, The lifting drive module (43) is used to drive the integrated mounting seat (46) and all components mounted thereon to switch between a first height and a second height; when at the first height, the whole is at a high position to facilitate the laser cutting head (27) to perform cutting work; when at the second height, the whole is lowered to a low position so that the single section of pipe that has been cut falls into the push path of the transfer mechanism (3).

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