A seamless steel tube straightening and cutting apparatus and method

Abstract

The present application relates to the field of steel pipe processing, and discloses a seamless steel pipe straightening and cutting device and method, which comprises a rotating traction mechanism located in a cylindrical fixed mechanism, cooperating with a stationary cylinder frame to form a loop traction structure required for the circumferential motion of the straightening structure; a loop point correction mechanism located in the rotating traction mechanism, cooperating with a straight-line sliding groove of a multi-station ring frame to perform a preliminary bending loop removal operation of the seamless steel pipe; and a loop surface correction mechanism located in the rotating traction mechanism, cooperating with a straight-line rotating seat of the multi-station ring frame to perform a loop roundness correction and sizing operation of the seamless steel pipe. Through physical isolation of the structural layout, the linear traction action of the pipe and the rotary action of the straightening and cutting are completely decoupled, the pinch drive rollers are only responsible for providing stable linear feeding on both sides of the rack, and the rotating traction mechanism relies on the cylindrical fixed mechanism to build an independent circumferential motion space outside the pipe, and the seamless steel pipe penetrates through multiple center through holes in sequence.

Description

Technical Field

[0001] This invention relates to the field of steel pipe processing technology, specifically to a seamless steel pipe straightening and cutting device and method. Background Technology

[0002] During the production, forming, and cooling processes of seamless steel pipes, a certain degree of axial bending and cross-sectional ellipticization inevitably occurs. Therefore, strict straightening and sizing treatments must be carried out before leaving the factory, and the pipes must be cut into specific lengths according to downstream application requirements. Currently, traditional steel pipe processing lines often treat straightening, sizing, and cutting as independent processes, which are completed by different individual machines.

[0003] In actual production processes, equipment often needs to be frequently switched to process steel pipes with different outer diameters. Existing rotary straightening equipment mostly relies on manual adjustment of the radial position of each straightening roller during pipe diameter adaptation, or uses multiple independent servo motors and hydraulic cylinders to drive the corresponding rollers. Manual adjustment is time-consuming and labor-intensive, and it's difficult to ensure consistent precision of the circumferentially distributed rollers. In continuous line operations, traditional rotary processing equipment often requires stopping the entire massive main shaft rotation mechanism and braking it when the steel pipe reaches the preset length for cutting, only to accelerate and restart for the next round of straightening after the pipe is cut. This frequent heavy-load start-stop not only causes severe mechanical vibration but also results in serious impact wear on bearings and transmission gears. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a seamless steel pipe straightening and cutting device and method, which solves the problems of existing seamless steel pipe processing equipment having separate straightening and cutting processes, cumbersome pipe diameter adaptation adjustments, and low synchronization accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a seamless steel pipe straightening and cutting device and method, comprising:

[0006] The frame base is used to fix the structure of the seamless steel pipe straightening and cutting equipment.

[0007] The clamping drive roller is located on the base of the frame and works with the stationary frame structure on both sides of the base to form the input and output clamping structure for seamless steel pipes.

[0008] The cylindrical fixing mechanism is located on the frame base and works with the stationary frame structures on both sides of the frame base to form a limiting structure for circumferential straightening;

[0009] The rotary traction mechanism is located in the cylindrical fixed mechanism and works with the stationary cylindrical frame to form the annular traction structure required for the circular motion of the straightening structure.

[0010] The circling correction mechanism is located in the rotary traction mechanism and works with the linear chute of the multi-station ring frame to perform the preliminary bending and circling removal operation of seamless steel pipes.

[0011] The circumferential straightening mechanism is located in the rotary traction mechanism and works in conjunction with the inline rotary table of the multi-station ring frame to perform circumferential straightening and sizing operations on seamless steel pipes.

[0012] The synchronous control mechanism is located in the cylindrical fixed mechanism, and together with the screw drive, the convex shaft structure of the extension carriage and the prying end of the output skid, it is used to form a controllable surrounding point correction mechanism and surrounding surface correction mechanism to synchronously change the surrounding diameter.

[0013] The circumferential cutting mechanism is located on the base of the frame. Together with the guide groove of the linkage fixing plate, the sealing cover, and the traction rod structure of the traction skid, it can automatically adjust the distance between itself and the surface of the steel pipe according to the diameter of the steel pipe and perform circumferential cutting.

[0014] Preferably, the stationary frame structure of the frame base is fixed on both sides of the input and output sections of the frame base. The clamping drive rollers are distributed in a vertically opposite manner within the stationary frames on both sides of the frame base and can be driven to rotate by a drive source. The cylindrical fixing mechanism is set between the two stationary frames on the top of the frame base. The rotating traction mechanism is embedded in the cylindrical fixing mechanism. The surrounding point correction mechanism is arranged in multiple sets simultaneously in a circular distribution within the cylindrical fixing mechanism and close to the output direction. The surrounding surface correction mechanism is arranged in multiple sets simultaneously in a circular distribution within the cylindrical fixing mechanism and close to the input direction. The synchronous control mechanism is embedded between the cylindrical fixing mechanism and the rotating traction mechanism. The surrounding cutting mechanism is set on the cylindrical fixing mechanism.

[0015] Preferably, the cylindrical fixing mechanism includes a stationary cylindrical frame and a screw drive component. The stationary cylindrical frame is fixed to the top of the machine frame base and placed between the two stationary frame structures. The center of the two disc structures has a through hole structure through which a steel pipe passes. The screw drive component is located on the side wall of the stationary cylindrical frame.

[0016] Preferably, the rotary traction mechanism includes a multi-station ring frame and a sealing cover. The multi-station ring frame is embedded in the stationary cylindrical frame and rotates. The linear sliding groove structure of the multi-station ring frame is equidistantly distributed on the multi-station ring frame and close to the output direction of the equipment. The linear rotating seat structure of the multi-station ring frame is equidistantly distributed on the multi-station ring frame and close to the input direction of the equipment. A drive gear plate is fixed on the side of the multi-station ring frame close to the input direction of the equipment, and a linkage fixing plate is fixed on the side of the multi-station ring frame close to the output direction of the equipment. The guide groove of the linkage fixing plate is provided on the linkage fixing plate. The drive gear plate and the linkage fixing plate rotate against the inner wall of the stationary cylindrical frame. The central area of ​​the drive gear plate and the linkage fixing plate is provided with a through hole structure through which a steel pipe passes. The sealing cover is fixed on the outside of the sealing cover parallel to the guide groove structure of the linkage fixing plate, and a through hole structure is also provided in the center.

[0017] Preferably, the surrounding point correction mechanism includes a linear synchronization frame and parallel diameter reduction components. The linear synchronization frame is arranged on the outer side of the multi-station ring frame near the input direction of the equipment, while the parallel synchronization components are multiple sets, which are installed on the multi-station ring frame in an equidistant manner.

[0018] Multiple parallel synchronization components include extended carriages, which are fixed at equal intervals on both sides of the linear synchronization frame. The bottom of the extended carriage has an inclined pressure roller. The extended carriage slides along the straight groove of the multi-station ring frame through the outer slide bar structure and is connected to the side wall of the multi-station ring frame by a snap ring structure. The convex shaft structure of the extended carriage is set at the top of the extended carriage.

[0019] Preferably, the surrounding surface correction mechanism includes a parallel traction frame and a parallel diameter reduction assembly. The parallel traction frame is disposed on the outer side of the multi-station ring frame near the output direction of the equipment, while the parallel diameter reduction assembly consists of multiple sets, which are mounted on the multi-station ring frame in an equidistant manner.

[0020] Multiple parallel reduction-diameter components include output skids, which are equidistantly distributed and rotate on both sides of the linear synchronous frame. The crankshaft ends of the multiple output skids rotate along the inline rotary seats of the multi-station ring frame. A reset spring structure is sleeved and fixed between the rotating end of the output skid and the inline rotary seat of the multi-station ring frame. The multiple output skids always maintain a parallel rotation state. An inline pressure roller rotates at the bottom end of the output skid. The traction skid is fixed at the rotating end of the output skid closest to the output direction of the equipment and extends inclined towards the linkage fixed plate. The traction rod structure of the traction skid is set at the outer end of the traction skid.

[0021] Preferably, the synchronization control mechanism includes a linkage sleeve and a nut sleeve. The linkage sleeve is sleeved between the stationary sleeve frame and the multi-station ring frame and is close to the input direction of the equipment. An inner push cone ring is provided on the inner side of the linkage sleeve, and the inclined cone surface of the inner push cone ring is always in contact with the convex shaft structure of the extension slide. A top contact ring is fixed on the side of the linkage sleeve close to the output direction of the equipment, and the top contact ring is always in contact with the prying end of the output skid.

[0022] Preferably, the circumferential cutting mechanism includes a limiting slide and a laser cutting head. The limiting slide slides along the guide groove structure of the linkage fixing plate. The laser cutting head is fixed on the outer side of the traction ring sleeve and is embedded in the sealing cover. The traction ring sleeve is fixed on the inner side of the limiting slide, and the inner sliding groove of the traction ring sleeve is sleeved on the traction rod structure of the traction skid. The upward and downward movement is completed by the rotation of the traction skid.

[0023] Preferably, a nut sleeve is fixed on the outside of the linkage sleeve, and the nut sleeve is threaded onto the output end of the lead screw drive.

[0024] Preferably, a working method for a seamless steel pipe straightening and cutting device includes the following steps: S1, the clamping drive roller clamps the seamless steel pipe and performs linear feed conveying, while the external power drives the drive toothed disc to drive the multi-station ring frame, linkage fixed disc and sealing cover to rotate at high speed around the linearly moving seamless steel pipe, thereby constructing a dynamic processing base that surrounds the circumference.

[0025] S2. During diameter adjustment, the lead screw drives the linkage sleeve to move axially, and the inner pusher cone ring squeezes the cam shaft, forcing the extension carriage to drive the inclined pressure roller to expand and contract synchronously through the linear synchronous frame; at the same time, the top contact ring pushes the output skid to deflect, and through the parallel traction frame, forces the inline pressure roller to expand and contract synchronously in parallel, thus completing the consistency adjustment of the processing diameter.

[0026] S3. When the output skid deflects and adjusts the diameter, the traction skid is simultaneously linked. The traction skid moves the traction ring sleeve, which drives the limit slide to slide radially along the guide groove, thereby driving the laser cutting head to move radially forward and backward synchronously with the movement of the inline pressure roller, accurately locking the optimal cutting focal length for different pipe diameters.

[0027] S4. During continuous operation, the inclined pressure roller performs spiral point rolling on the steel pipe through inclined revolution to eliminate bending; the straight pressure roller performs rounding and sizing through parallel surface rolling. After reaching the preset length, the steel pipe stops feeding. The laser cutting head at a precise focal length rotates at high speed with the ring frame to perform 360-degree closed cut. After cutting, the steel pipe is re-fed to enter the next cycle.

[0028] This invention provides a device and method for straightening and cutting seamless steel pipes. It has the following beneficial effects:

[0029] 1. This invention completely decouples the linear traction action of the pipe from the rotary action of straightening and cutting through the physical isolation of the structural layout. The clamping drive rollers on both sides of the frame are only responsible for providing stable linear feed, while the rotary traction mechanism relies on the cylindrical fixing mechanism to build an independent circumferential motion space outside the pipe. The seamless steel pipe passes through multiple levels of central through holes in sequence, so that the inner and outer layers of motion trajectories do not intersect each other, providing a highly stable dynamic bearing base for subsequent continuous processing.

[0030] 2. This invention utilizes the deflection of the outermost output skid as the driving force, directly engaging the traction ring through the movement of the traction skid, forcibly driving the limiting slide to slide purely radially within the guide groove. This interlocking transmission chain precisely converts the physical displacement of the pressure roller against the pipe diameter into the advance and retreat compensation amount of the laser cutting head according to a geometric ratio. No additional electronic sensors or servo drives are required; synchronization of diameter adjustment and focusing is achieved solely through the physical structure.

[0031] 3. In this invention, the continuous revolution of the rotary traction mechanism acts on the linearly moving steel pipe. When entering the cutting stage, the system only cuts off the power of the clamping drive roller to make the pipe stand still, while the multi-station ring frame, the linkage fixed plate and the cutting mechanism still maintain their original high-speed rotational inertia and directly cut into the ring cutting operation. The operation status of each mechanism is interlocked, avoiding the mechanical impact and position interference caused by the frequent start and stop of the heavy rotary mechanism. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of the main structure of the present invention. Figure 1 ;

[0033] Figure 2 This is a three-dimensional schematic diagram of the main structure of the present invention. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the cylindrical fixing mechanism structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the rotary traction mechanism structure of the present invention;

[0036] Figure 5 This is a schematic diagram of the installation state of the surrounding point correction mechanism of the present invention;

[0037] Figure 6 This is a schematic diagram of the extended sliding structure of the present invention;

[0038] Figure 7 This is a schematic diagram of the installation state of the surrounding surface correction mechanism of the present invention;

[0039] Figure 8 This is a schematic diagram of the surrounding surface correction mechanism of the present invention;

[0040] Figure 9 This is a schematic diagram of the installation state of the circumferential cutting mechanism of the present invention. Figure 1 ;

[0041] Figure 10 This is a schematic diagram of the installation state of the circumferential cutting mechanism of the present invention. Figure 2 ;

[0042] Figure 11 This is a schematic diagram of the installation state of the synchronization control mechanism of the present invention.

[0043] The components include: 1. Frame base; 2. Clamping drive roller; 3. Cylindrical fixing mechanism; 4. Rotary traction mechanism; 5. Circumferential point correction mechanism; 6. Circumferential surface correction mechanism; 7. Synchronization control mechanism; 8. Circumferential cutting mechanism; 31. Stationary cylindrical frame; 32. Screw drive component; 41. Multi-station ring frame; 42. Drive gear plate; 43. Linkage fixing plate; 44. Sealing cover; 51. Linear synchronization frame; 52. Extension slide; 53. Inclined pressure roller; 61. Parallel traction frame; 62. Output skid; 63. Inline pressure roller; 64. Traction skid; 71. Linkage sleeve; 72. Nut sleeve; 73. Top contact ring; 74. Inner push cone ring; 81. Limiting slide; 82. Laser cutting head; 83. Traction ring sleeve. Detailed Implementation

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see the appendix Figure 1 - Appendix Figure 3 This invention provides a seamless steel pipe straightening and cutting device, comprising: a frame base 1 for fixing the structure of the seamless steel pipe straightening and cutting device; a clamping drive roller 2 located on the frame base 1, which cooperates with the stationary frame structure on both sides of the frame base 1 to form the input and output clamping structure of the seamless steel pipe. The stationary frame structure of the frame base 1 is distributed and fixed on the input and output parts on both sides of the frame base 1. The clamping drive roller 2 is distributed in the stationary frame on both sides of the frame base 1 in an up-down relative manner and can be driven to rotate by a drive source.

[0046] Please see the appendix Figure 2 - Appendix Figure 3 The cylindrical fixing mechanism 3 is located on the frame base 1 and works with the stationary frame structure on both sides of the frame base 1 to form a limiting structure for circumferential straightening. The cylindrical fixing mechanism 3 is set between the stationary frames on both sides of the top of the frame base 1.

[0047] Please see the appendix Figure 2 - Appendix Figure 3The cylindrical fixing mechanism 3 includes a stationary cylindrical frame 31 and a screw drive 32. The stationary cylindrical frame 31 is fixed on the top of the frame base 1 and placed between the two stationary frame structures. The center of the two disc structures is provided with a through hole structure through which the steel pipe passes. The screw drive 32 is set on the side wall of the stationary cylindrical frame 31. The stationary cylindrical frame 31 restricts the passage of the seamless steel pipe through the through hole structure reserved in the center of the discs at both ends. When the seamless steel pipe passes through the center of the stationary cylindrical frame 31, the linear thrust output by the screw drive 32 is translated and transmitted along the side wall of the stationary cylindrical frame 31.

[0048] Please see the appendix Figure 3 - Appendix Figure 5 The rotary traction mechanism 4 is located in the cylindrical fixing mechanism 3 and works with the stationary cylindrical frame 31 to form the annular traction structure required for the circular motion of the straightening structure. The rotary traction mechanism 4 is embedded and rotates within the cylindrical fixing mechanism 3.

[0049] Please see the appendix Figure 3 - Appendix Figure 5 The rotary traction mechanism 4 includes a multi-station ring frame 41 and a sealing cover 44. The multi-station ring frame 41 is embedded in the stationary cylindrical frame 31 and rotates. The linear sliding groove structure of the multi-station ring frame 41 is equidistantly distributed on the multi-station ring frame 41 and is close to the output direction of the equipment. The linear rotating seat structure of the multi-station ring frame 41 is equidistantly distributed on the multi-station ring frame 41 and is close to the input direction of the equipment. A drive gear plate 42 is fixed on the side of the multi-station ring frame 41 close to the input direction of the equipment, and a linkage fixing plate 43 is fixed on the side of the multi-station ring frame 41 close to the output direction of the equipment. The guide groove of the linkage fixing plate 43 is provided on the linkage fixing plate 43. The drive gear plate 42 and the linkage fixing plate 43 rotate against the inner wall of the stationary cylindrical frame 31. The drive gear plate 42 and the linkage fixed plate 43 have through holes in their central areas for steel pipes to pass through. The sealing cover 44 is fixed to the outside of the sealing cover 44 parallel to the guide groove structure of the linkage fixed plate 43, and also has a through hole in its center. The drive gear plate 42 receives the rotational torque transmitted by the external gears, which forces the multi-station ring frame 41 to slide and rotate on the inner wall of the stationary cylindrical frame 31. The rotation of the multi-station ring frame 41 synchronously pulls the linkage fixed plate 43 and the sealing cover 44 on the other side to rotate. When the seamless steel pipe travels in a straight line through all the above-mentioned through holes, the linkage fixed plate 43 uses the guide groove to constrain the movement trajectory of the cutting component, while the sealing cover 44 isolates the external space, together forming a synchronously rotating processing bearing system.

[0050] Please see the appendix Figure 3 - Appendix Figure 6 The circumferential correction mechanism 5 is located in the rotary traction mechanism 4 and works with the straight slide of the multi-station ring frame 41 to perform the preliminary bending and circumferential removal operation of the seamless steel pipe. The circumferential correction mechanism 5 consists of multiple sets of circumferentially distributed in the cylindrical fixing mechanism 3 and is close to the output direction.

[0051] Please see the appendix Figure 3 - Appendix Figure 6 The surrounding point correction mechanism 5 includes a linear synchronous frame 51 and parallel diameter reduction components. The linear synchronous frame 51 is set on the outer side of the multi-station ring frame 41 near the input direction of the equipment, while the parallel synchronous components are multiple sets, which are mounted on the multi-station ring frame 41 in an equidistant manner. The linear synchronous frame 51 synchronously connects the multiple sets of parallel synchronous components on the multi-station ring frame 41. When the external radial adjustment power is applied to the parallel synchronous components, the linear synchronous frame 51 plays the role of the connecting rod, driving all the parallel synchronous components to produce linear displacement of the same distance.

[0052] Please see the appendix Figure 5 - Appendix Figure 6 Multiple parallel synchronous components include an extension carriage 52, which is fixed at equal intervals on both sides of the linear synchronous frame 51. The bottom end of the extension carriage 52 has an inclined pressure roller 53. The extension carriage 52 slides along the straight groove of the multi-station ring frame 41 through the outer sliding strip structure and is connected to the side wall of the multi-station ring frame 41 by a retaining spring structure. The convex shaft structure of the extension carriage 52 is set at the top of the extension carriage 52. After the convex shaft structure of the extension carriage 52 is subjected to the external thrust, it overcomes the reverse elastic force restraint of the retaining spring structure and slides inward along the straight groove of the multi-station ring frame 41 using the outer sliding strip structure. The sliding of the extension carriage 52 drives the inclined pressure roller 53 at the bottom end to abut against the outer wall of the seamless steel pipe. The inclined pressure roller 53, relying on its inclined installation posture, rotates on its own axis while following the revolution of the extension carriage 52 and is subjected to the friction force of the steel pipe, forming point-like spiral extrusion stress on the surface of the steel pipe and performing the initial bending correction operation of the pipe.

[0053] Please see the appendix Figure 4 - Appendix Figure 10 The surrounding surface straightening mechanism 6 is located in the rotary traction mechanism 4 and works with the inline rotary seat of the multi-station ring frame 41 to perform the preliminary surrounding straightening and sizing operation of seamless steel pipes. The surrounding surface straightening mechanism 6 is arranged in multiple sets simultaneously in a cylindrical fixing mechanism 3 and close to the input direction.

[0054] Please see the appendix Figure 6 - Appendix Figure 10 The surrounding surface correction mechanism 6 includes a parallel traction frame 61 and a parallel diameter reduction assembly. The parallel traction frame 61 is set on the outer side of the multi-station ring frame 41 near the output direction of the equipment, while the parallel diameter reduction assembly consists of multiple sets, which are equidistantly distributed on the multi-station ring frame 41. The parallel traction frame 61 physically connects the multiple sets of parallel diameter reduction assemblies equidistantly distributed on the multi-station ring frame 41 in the motion trajectory. When a certain parallel diameter reduction assembly deflects, the parallel traction frame 61 uses its own connecting rod pulling action to force all the other parallel diameter reduction assemblies to follow the deflection at the same angle.

[0055] Please see the appendix Figure 6 - Appendix Figure 10 Multiple parallel reduction-diameter components include output skids 62, which are equidistantly distributed and rotate on both sides of the linear synchronous frame 51. The crankshaft ends of the multiple output skids 62 rotate along the inline rotary seats of the multi-station ring frame 41. A reset spring structure is sleeved and fixed between the rotating end of the output skid 62 and the inline rotary seat of the multi-station ring frame 41, and the multiple output skids 62 always maintain a parallel rotation state. An inline pressure roller 63 rotates at the bottom end of the output skid 62. A traction skid 64 is fixed at the rotating end of the output skid 62 closest to the output direction of the equipment and extends inclined towards the linkage fixing plate 43. The traction rod structure is located at the outer end of the traction skid 64. After the crankshaft end of the output skid 62 is subjected to axial thrust, it overcomes the resistance of the reset spring and generates lever deflection along the inline rotary seat of the multi-station ring frame 41. This deflection action forces the inline pressure roller 63 to adhere to the outer wall of the seamless steel pipe and applies linear planar rolling pressure parallel to the axis. At the same time, the deflection angle of the outermost output skid 62 is fully transmitted to the traction skid 64, causing the traction skid 64 to tilt and swing in the direction of the linkage fixed plate 43. The traction rod structure on the outer side of the traction skid 64 then draws an arc trajectory, converting the diameter adjustment displacement of the pressure roller into the mechanical force for subsequent actuation of the cutting components.

[0056] Please see the appendix Figure 3 - Appendix Figure 11 The synchronous control mechanism 7 is located in the cylindrical fixing mechanism 3. It works with the lead screw drive 32, the convex shaft structure of the extension slide 52 and the prying end of the output pryer 62 to form a controllable circumferential point correction mechanism 5 and circumferential surface correction mechanism 6 to synchronously change the circumferential diameter. The synchronous control mechanism 7 is embedded between the cylindrical fixing mechanism 3 and the rotary traction mechanism 4.

[0057] Please see the appendix Figure 3 - Appendix Figure 11The synchronous control mechanism 7 includes a linkage sleeve 71 and a nut sleeve 72. The linkage sleeve 71 is sleeved between the stationary sleeve frame 31 and the multi-position ring frame 41, and is close to the input direction of the equipment. An inner push cone ring 74 is provided on the inner side of the linkage sleeve 71, and the inclined cone surface of the inner push cone ring 74 is always in contact with the convex shaft structure of the extension slide 52. A top contact ring 73 is fixed on the side of the linkage sleeve 71 close to the output direction of the equipment, and the top contact ring 73 is always in contact with the output direction. When the linkage sleeve 71 moves linearly between the stationary sleeve 31 and the multi-position ring frame 41 on the prying end of the output skid 62, the inclined cone surface of the inner push cone ring 74 converts the axial displacement into radial pressure force, pushing the convex shaft structure of the extension slide 52 toward the center of the pipe. At the same time, the top contact ring 73 on the other side of the linkage sleeve 71 moves axially, and its end face directly pushes against the prying end of the output skid 62, forcing the output skid 62 to flip over.

[0058] Please see the appendix Figure 11 The linkage sleeve 71 is fixed with a nut sleeve 72 on the outside, and the nut sleeve 72 is threaded onto the output end of the screw drive 32. The nut sleeve 72 is constrained to the periphery of the linkage sleeve 71, and its internal thread structure is engaged with the thread structure at the output end of the screw drive 32. When the screw drive 32 is working, the nut sleeve 72 is subjected to the normal thrust of the threaded inclined surface, which is a linear traction force that drags the linkage sleeve 71 to a certain position.

[0059] Please see the appendix Figure 9 - Appendix Figure 11 The circumferential cutting mechanism 8 is located on the frame base 1. It works in conjunction with the guide groove of the linkage fixing plate 43, the sealing cover 44, and the traction rod structure of the traction skid 64 to automatically adjust the distance between itself and the surface of the steel pipe according to the diameter of the steel pipe and to perform circumferential cutting. The circumferential cutting mechanism 8 is set on the cylindrical fixing mechanism 3.

[0060] Please see the appendix Figure 9 - Appendix Figure 11The surrounding cutting mechanism 8 includes a limiting slide 81 and a laser cutting head 82. The limiting slide 81 slides along the guide groove structure of the linkage fixing plate 43. The laser cutting head 82 is fixed on the outside of the traction ring sleeve 83 and is embedded in the sealing cover 44. The traction ring sleeve 83 is fixed on the inside of the limiting slide 81, and the inner sliding groove of the traction ring sleeve 83 is sleeved on the traction rod structure of the traction skid 64. The traction skid 64 rotates to complete the upward and downward movement. The inner sliding groove of the traction ring sleeve 83 sleeves and captures the swing trajectory of the traction rod structure of the traction skid 64, converting the arc-shaped force of the swing into a linear push-pull force along the radial direction of the multi-station ring frame 41. Under the direct action of this push-pull force, the limiting slide 81 is restricted by the movement trajectory of the guide groove structure of the linkage fixing plate 43, forcibly carrying the laser cutting head 82 fixed on the outside of the traction ring sleeve 83 to produce a linear upward or downward displacement. The laser cutting head 82 thus completes radial advance and retreat within the sealing cover 44.

[0061] This invention also provides a method for operating a seamless steel pipe straightening and cutting device, comprising the following steps:

[0062] S1. The clamping drive roller 2 receives the rotational torque output by the external drive source. It applies radial clamping force and tangential friction force to the outer wall surface of the seamless steel pipe through its outer wall surface, forcing the seamless steel pipe to overcome static friction and generate a linear feeding motion along the axial direction of the frame base 1. During the process of the seamless steel pipe passing through the inside of the equipment along the axial direction, the rotary traction mechanism 4 intervenes and operates synchronously. The external rotary power source directly applies the rotational torque to the toothed edge of the drive gear plate 42. After the drive gear plate 42 receives the rotational torque, it drives the multi-station ring frame 41 to generate a high-speed rotational motion within the inner wall of the stationary cylinder frame 31. Accompanying the rotation of the multi-station ring frame 41, the linkage fixed plate 43 and the sealing cover 44, which are rigidly connected to it, rotate synchronously around the central axis of the seamless steel pipe, forming a circular operation state outside the seamless steel pipe. The rod of the seamless steel pipe passes through the through hole structure opened in the center of the drive gear plate 42, the linkage fixed plate 43 and the sealing cover 44 in sequence, maintaining its axial linear feeding trajectory.

[0063] S2. When it is necessary to adapt to the outer diameter of the input seamless steel pipe, the lead screw drive 32 starts and outputs rotational motion, driving the nut sleeve 72 to drive the linkage sleeve 71 to generate a translational motion parallel to the axis of the seamless steel pipe in the gap between the stationary sleeve frame 31 and the multi-station ring frame 41. The linear translation of the linkage sleeve 71 simultaneously triggers two transmission chains, and the inner push cone ring 74 inside the linkage sleeve 71 is axially fed accordingly. The inclined cone surface of the inner push cone ring 74 is continuously applied to the convex shaft structure of the extension slide 52. After the convex shaft structure is compressed, it pushes the extension slide 52 to slide inward along the straight slide groove of the multi-station ring frame 41 by relying on the slide bar structure on its outer side. During this sliding process, the linear synchronous frame 51, by its connection constraint on the extension slides 52 on both sides, drives all the equally distributed extension slides 52 to maintain a constant displacement. This causes all the inclined pressure rollers 53 to contract or expand synchronously toward the outer wall of the seamless steel pipe, while the top contact ring 73 on the other side of the linkage sleeve 71 undergoes axial displacement synchronously. The end face of the top contact ring 73 directly applies a thrust to the prying end of the output skid 62. After the output skid 62 is subjected to force, it uses the bearing node at the crankshaft end in the inline rotary seat of the multi-station ring frame 41 as the fulcrum to overcome the torque resistance of the reset spring structure and generate a deflection angle displacement. As the individual output skid 62 deflects, the parallel traction frame 61 pulls all the output skids 62 connected by the bearings to deflect at the same angle, so that all the output skids 62 maintain an absolutely parallel posture, thereby driving the inline pressure rollers 63 mounted at their bottom end to contract or expand synchronously toward the surface of the seamless steel pipe along a uniform arc trajectory, completing the adjustment of the working diameter of the circumferential surface of the seamless steel pipe.

[0064] S3. When the output skid 62 is deflected and adjusted, the output skid 62 closest to the output direction of the equipment transmits its full deflection motion to the traction skid 64. The traction skid 64 deflects synchronously with the output skid 62, causing the traction rod structure at the outer end of the traction skid 64 to directly cut into the inner groove of the traction ring sleeve 83. Using the prying force at the end of the lever, a pushing and pulling force along the linear trajectory of the multi-station ring frame 41 is applied to the traction ring sleeve 83. After receiving the pushing and pulling force, the traction ring sleeve 83 drives the limiting slide 81. Sliding occurs within the guide groove structure opened on the surface of the linkage fixed plate 43. The limiting slide 81 and its carried traction ring sleeve 83 can only produce radial linear reciprocating movement, causing the laser cutting head 82 outside the traction ring sleeve 83 and embedded in the sealing cover 44 to move closer to the steel pipe surface and retract. It moves radially forward and backward synchronously with the diameter adjustment action of the inline pressure roller 63. The laser cutting head 82 ensures that when facing seamless steel pipes of different diameters, the focal emission end of the laser cutting head 82 maintains a suitable cutting distance from the steel pipe surface.

[0065] S4. After the diameter and focal length adjustments are completed, the clamping drive roller 2 continuously outputs a linear feed force, propelling the seamless steel pipe forward. Simultaneously, the multi-station ring frame 41 maintains a constant high-speed rotation. The inclined pressure roller 53, utilizing its inclined posture and the combined motion of its rotation, applies continuous spiral extrusion force to the outer surface of the seamless steel pipe. Through point-contact rolling, this counteracts the axial bending stress of the steel pipe. Subsequently, the seamless steel pipe advances linearly to the area where the inline pressure roller 63 is located. The inline pressure roller 63, with its posture parallel to the steel pipe axis, in conjunction with the rotation of the multi-station ring frame 41, applies full-coverage planar pressure to the outer wall of the steel pipe, driving the steel pipe to undergo circumferential sizing and rounding processing. As the seamless steel pipe advances... When the length reaches the preset cutting size, the energy supply to the drive source of the clamping drive roller 2 is cut off, and the seamless steel pipe is in a static clamping state. At this time, the multi-station ring frame 41, together with the linkage fixed plate 43 and the sealing cover 44, still maintains the original high-speed rotation motion, driving the laser cutting head 82, which is in a precise focal position, to perform a 360-degree circumference around the stationary seamless steel pipe. The laser cutting head 82 directly cuts the steel pipe body circumferentially using the circumferential cutting trajectory. After the circumferential cutting trajectory is closed, the laser cutting head 82 stops cutting, and the drive source of the clamping drive roller 2 regains energy and starts to operate again, continuing to apply traction force to the seamless steel pipe, pushing a new section of the pipe body into the straightening and next round of processing cycle.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seamless steel pipe straightening and cutting device, characterized in that, include: The frame base (1) is used to fix the structure of the seamless steel pipe straightening and cutting equipment; The clamping drive roller (2) is located on the frame base (1) and works with the stationary frame structure on both sides of the frame base (1) to form the input and output clamping structure of the seamless steel pipe; The cylindrical fixing mechanism (3) is located on the frame base (1) and works with the stationary frame structure on both sides of the frame base (1) to form a limiting structure for circumferential straightening; The rotary traction mechanism (4) is located in the cylindrical fixing mechanism (3) and works with the stationary cylindrical frame (31) to form the annular traction structure required for the circular motion of the straightening structure; The surrounding point correction mechanism (5) is located in the rotating traction mechanism (4) and works with the straight chute of the multi-station ring frame (41) to perform the preliminary bending and surrounding removal operation of the seamless steel pipe; The surrounding point correction mechanism (5) includes a linear synchronization frame (51) and parallel diameter reduction components. The linear synchronization frame (51) is set on the outside of the multi-station ring frame (41) near the input direction of the equipment, while the parallel synchronization components are multiple sets, which are installed on the multi-station ring frame (41) in an equidistant manner. Multiple parallel synchronization components include an extension carriage (52), and multiple extension carriages (52) are fixed on both sides of the linear synchronization frame (51) at equal intervals. The bottom end of the extension carriage (52) has an inclined pressure roller (53) arranged at an angle. At the same time, the extension carriage (52) slides along the straight groove of the multi-station ring frame (41) through the outer slide bar structure, and is connected to the side wall of the multi-station ring frame (41) by a snap ring structure. The convex shaft structure of the extension carriage (52) is set at the top of the extension carriage (52). The surrounding surface straightening mechanism (6) is located in the rotating traction mechanism (4) and works with the inline rotating seat of the multi-station ring frame (41) to perform the preliminary surrounding straightening and sizing operation of seamless steel pipes; The surrounding surface correction mechanism (6) includes a parallel traction frame (61) and a parallel diameter reduction assembly. The parallel traction frame (61) is set on the outside of the multi-station ring frame (41) near the output direction of the equipment, while the parallel diameter reduction assembly consists of multiple sets, which are installed on the multi-station ring frame (41) in an equidistant manner. Multiple parallel reduction-diameter components include output skids (62), and multiple output skids (62) are equidistantly distributed and rotate on both sides of the linear synchronous frame (51). The crankshaft ends of multiple output skids (62) rotate along the inline rotary table of the multi-station ring frame (41). A reset snap ring structure is sleeved and fixed between the rotating end of the output skid (62) and the inline rotary table of the multi-station ring frame (41). Multiple output skids (62) always maintain parallel rotation. An inline pressure roller (63) rotates at the bottom end of the output skid (62). A traction skid (64) is fixed at the rotating end of the output skid (62) closest to the output direction of the equipment and extends obliquely toward the linkage fixed plate (43). The traction rod structure of the traction skid (64) is set at the outer end of the traction skid (64). The synchronous control mechanism (7) is located in the cylindrical fixing mechanism (3), and works with the lead screw drive (32), the convex shaft structure of the extension carriage (52) and the prying end of the output pryer (62) to form a controllable surrounding point correction mechanism (5) and surrounding surface correction mechanism (6) to synchronously change the surrounding diameter. The circumferential cutting mechanism (8) is located on the frame base (1). It works in conjunction with the guide groove of the linkage fixing plate (43), the sealing cover (44), and the traction rod structure of the traction skid (64). The distance between the mechanism and the surface of the steel pipe can be automatically adjusted synchronously according to the diameter of the steel pipe, and circumferential cutting is performed.

2. The seamless steel pipe straightening and cutting equipment according to claim 1, characterized in that, The stationary frame structure of the frame base (1) is fixed on both sides of the input and output parts of the frame base (1). The clamping drive roller (2) is distributed in the stationary frame on both sides of the frame base (1) in an up-down relative manner and can be driven to rotate by the drive source. The cylindrical fixing mechanism (3) is set between the stationary frames on both sides of the top of the frame base (1). The rotating traction mechanism (4) is embedded in the cylindrical fixing mechanism (3). The surrounding point correction mechanism (5) is arranged in multiple sets in the cylindrical fixing mechanism (3) and close to the output direction. The surrounding surface correction mechanism (6) is arranged in multiple sets in the cylindrical fixing mechanism (3) and close to the input direction. The synchronous control mechanism (7) is embedded between the cylindrical fixing mechanism (3) and the rotating traction mechanism (4). The surrounding cutting mechanism (8) is set on the cylindrical fixing mechanism (3).

3. The seamless steel pipe straightening and cutting equipment according to claim 1, characterized in that, The cylindrical fixing mechanism (3) includes a stationary cylindrical frame (31) and a screw drive (32). The stationary cylindrical frame (31) is fixed on the top of the frame base (1) and placed between the two stationary frame structures. The center of the two disc structures has a through hole structure through which a steel pipe passes. The screw drive (32) is set on the side wall of the stationary cylindrical frame (31).

4. The seamless steel pipe straightening and cutting equipment according to claim 1, characterized in that, The rotary traction mechanism (4) includes a multi-station ring frame (41) and a sealing cover (44). The multi-station ring frame (41) is embedded in the stationary cylindrical frame (31) and rotates. The linear sliding groove structure of the multi-station ring frame (41) is equidistantly distributed on the multi-station ring frame (41) and close to the output direction of the equipment. The linear rotating seat structure of the multi-station ring frame (41) is equidistantly distributed on the multi-station ring frame (41) and close to the input direction of the equipment. A drive gear plate (42) is fixed on the side of the multi-station ring frame (41) close to the input direction of the equipment. The fixed plate (43) is fixed on the side of the multi-station ring frame (41) near the output direction of the equipment, and the guide groove of the linkage fixed plate (43) is set on the linkage fixed plate (43). The drive gear plate (42) and the linkage fixed plate (43) are attached to the inner wall of the stationary cylinder frame (31) and rotate. The drive gear plate (42) and the linkage fixed plate (43) have a through hole structure through which the steel pipe passes through in the central area. The sealing cover (44) is fixed on the outside of the sealing cover (44) parallel to the guide groove structure of the linkage fixed plate (43), and the center is also provided with a through hole structure.

5. A seamless steel pipe straightening and cutting device according to claim 1, characterized in that, The synchronous control mechanism (7) includes a linkage sleeve (71) and a nut sleeve (72). The linkage sleeve (71) is sleeved between the stationary sleeve frame (31) and the multi-station ring frame (41) and is close to the input direction of the equipment. An inner push cone ring (74) is provided on the inner side of the linkage sleeve (71), and the inclined cone surface of the inner push cone ring (74) is always in contact with the convex shaft structure of the extension slide (52). A top contact ring (73) is fixed on the side of the linkage sleeve (71) close to the output direction of the equipment, and the top contact ring (73) is always in contact with the prying end of the output pry frame (62).

6. The seamless steel pipe straightening and cutting equipment according to claim 1, characterized in that, The surrounding cutting mechanism (8) includes a limiting slide (81) and a laser cutting head (82). The limiting slide (81) slides along the guide groove structure of the linkage fixing plate (43). The laser cutting head (82) is fixed on the outside of the traction ring sleeve (83) and is embedded in the sealing cover (44). The traction ring sleeve (83) is fixed on the inside of the limiting slide (81) and the inner groove of the traction ring sleeve (83) is sleeved on the traction rod structure of the traction skid (64). The upward and downward movement is completed by the rotation of the traction skid (64).

7. A seamless steel pipe straightening and cutting device according to claim 5, characterized in that, The outer side of the linkage sleeve (71) is fixed with a nut sleeve (72), and the nut sleeve (72) is threaded onto the output end of the lead screw drive (32).

8. The working method of a seamless steel pipe straightening and cutting device according to any one of claims 1-7, characterized in that, Includes the following steps: S1. The clamping drive roller (2) clamps the seamless steel pipe to perform linear feed conveying. At the same time, the external power drives the drive toothed disc (42) to drive the multi-station ring frame (41), the linkage fixed disc (43) and the sealing cover (44) to rotate at high speed around the linearly moving seamless steel pipe, thereby constructing a dynamic processing base that surrounds the circumference. S2. During diameter adjustment, the screw drive (32) drives the linkage sleeve (71) to move axially, and the inner push cone ring (74) squeezes the convex shaft, forcing the extension slide (52) to drive the inclined pressure roller (53) to expand and contract synchronously through the linear synchronous frame (51); at the same time, the top contact ring (73) pushes the output pry bar (62) to deflect, and through the linkage of the parallel traction frame (61), forces the straight pressure roller (63) to expand and contract synchronously in parallel, thus completing the consistency adjustment of the processing diameter; S3. When the output skid (62) deflects and adjusts the diameter, the traction skid (64) is linked in time. The traction skid (64) moves the traction ring (83) and drives the limit slide (81) to slide radially along the guide groove, thereby driving the laser cutting head (82) to move radially forward and backward in sync with the action of the inline pressure roller (63) to accurately lock the best cutting focal length for different pipe diameters. S4. During continuous operation, the inclined pressure roller (53) performs spiral point rolling on the steel pipe by tilting and rotating to eliminate bending; the straight pressure roller (63) performs rounding and sizing by parallel surface rolling. After reaching the preset length, the steel pipe stops feeding. The laser cutting head (82) at the precise focal length rotates at high speed with the ring frame to perform 360-degree closed cut. After cutting, the steel pipe is re-fed into the next cycle.

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