Production process of high-strength pipeline steel seamless steel pipe

Abstract

The invention relates to a production process of a high-strength pipeline steel seamless steel pipe, and belongs to the technical field of seamless steel pipe production. Step 2, perforating; step 3, hot rolling; step 4, finish rolling; step 5, polishing treatment; polishing the surface of the seamless steel pipe by using polishing equipment; during polishing, the seamless steel pipe is positioned in the length direction through the driving assembly and rotates automatically, meanwhile, the seamless steel pipe is polished through the polishing device, and the polishing device is driven by the moving assembly to move in the length direction of the seamless steel pipe. Radial positioning of the polishing position of the seamless steel pipe is achieved through the first positioning assembly, and radial positioning of other positions of the seamless steel pipe is achieved through the second positioning assembly. In the seamless steel pipe polishing process, the balls on the positioning strips abut against the seamless steel pipe, radial deformation of the seamless steel pipe during rotation is avoided, and the size precision of the seamless steel pipe is improved.

Description

Technical Field

[0001] The present invention relates to a production process for seamless steel pipes of high-strength pipeline steel, belonging to the technical field of seamless steel pipe production. Background Art

[0002] Seamless steel pipes of high-strength pipeline steel are key materials for energy pipelines such as oil and natural gas, possessing high compressive resistance, corrosion resistance, high-temperature resistance, etc., and being able to withstand pressures and stresses under extreme environments.

[0003] The Chinese invention patent with the publication number CN116967921A discloses a seamless steel pipe production process and its equipment, mainly including the following steps: melting, melting the steel billet in equipment such as a converter and an electric furnace; piercing, continuously piercing the steel billet obtained through melting by a piercing machine, and the steel billet becomes a seamless steel pipe preform; hot rolling, subjecting the preform obtained through piercing to hot rolling to improve the organizational structure of the steel; finish rolling, subjecting the seamless steel pipe obtained through hot rolling to finish rolling to make the surface quality of the seamless steel pipe better. This invention can adjust the extension distance of the second electric push rod according to seamless steel pipes of different diameters, so that the anti-slip pad firmly fixes seamless steel pipes of different diameters, which can well reduce the situation of surface damage of seamless steel pipes during polishing, and can also automatically control the addition measurement of the rust preventive liquid, not only reducing the waste of the rust preventive liquid, but also improving the rust prevention effect of seamless steel pipes. However, in the prior art, during the polishing process of seamless steel pipes, with the rotation of the seamless steel pipe, since both ends of the seamless steel pipe are circumferentially positioned through electromagnetic fixing seats, and the middle end of the seamless steel pipe is vacated, the middle end of the seamless steel pipe is prone to radial offset under its own gravity, causing the seamless steel pipe to have an enlarged offset amount under centrifugal force and generating radial deformation during rotation, thus affecting the polishing accuracy, that is, affecting the dimensional accuracy of the seamless steel pipe.

[0004] Therefore, there is a need for a production process for seamless steel pipes of high-strength pipeline steel to improve the dimensional accuracy of seamless steel pipes. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to provide a production process for seamless steel pipes of high-strength pipeline steel that improves the dimensional accuracy of seamless steel pipes in order to overcome the deficiencies of the prior art.

[0006] The technical solution adopted by the present invention to solve the above problems is: a production process for seamless steel pipes of high-strength pipeline steel, including the following steps: Step 1, melting the steel billet; Step 2, piercing; Step 3, hot rolling; Step 4, finish rolling; Step 5, polishing treatment; Performing surface polishing on the seamless steel pipe using a polishing device; During polishing, the positioning of the seamless steel pipe in the length direction is achieved through the driving component, and the self-rotation of the seamless steel pipe is realized. At the same time, the polishing of the seamless steel pipe is achieved through the polishing device, and the polishing device is driven by the moving component to move along the length direction of the seamless steel pipe. Among them, the radial positioning of the polishing position of the seamless steel pipe is achieved through the first positioning component, and the radial positioning of other positions of the seamless steel pipe is achieved through the second positioning component, thus avoiding the radial deformation of the seamless steel pipe and improving the dimensional accuracy of the seamless steel pipe; In addition, the collection of debris generated during the polishing process is achieved through the collection component, avoiding the influence of debris on the positioning effect of the first positioning component on the seamless steel pipe; Step 6: Perform anti-rust treatment on the seamless steel pipe.

[0007] Preferably, the polishing equipment includes a workbench, on which a driving component and a polishing device are arranged. The driving component is used to achieve the positioning of the seamless steel pipe in the length direction and drive the seamless steel pipe to rotate. The polishing device is connected with a moving component, and the moving component is used to drive the polishing device to move along the length direction of the seamless steel pipe. The polishing device is used to perform the polishing action on the seamless steel pipe, and a first positioning component and a second positioning component are arranged on the workbench; The polishing device includes a second lead screw, one end of which is driven by a clamping motor. Two moving blocks are connected to the second lead screw. Both moving blocks are threadedly connected to the second lead screw. The two moving blocks are symmetrically arranged along the length direction of the second lead screw, and the thread directions of the two moving blocks are opposite. Polishing blocks are connected to both moving blocks; The first positioning component includes two positioning bars, which correspond to the two moving blocks one by one. The positioning bars are fixedly arranged on the moving blocks. The two positioning blocks are symmetrically arranged along the length direction of the second lead screw. The positioning bars are arc-shaped, and the arc openings of the two positioning bars are arranged close to each other. A plurality of balls are rollingly embedded on the inner side wall of the positioning bar; The second positioning component includes multiple groups of second positioning units, which are distributed along the length direction of the second lead screw. Each group of second positioning units has two, and the two second positioning units in the same group correspond to the two positioning bars one by one; The second positioning unit includes a moving plate, on which two positioning wheels are arranged, and the two positioning wheels are distributed up and down. A cylinder is connected to the moving plate, and the cylinder is used to drive the moving plate to move along the length direction of the second lead screw.

[0008] Preferably, the driving component includes a chuck, which is driven by a polishing motor.

[0009] Preferably, the driving assembly further includes a positioning block and a moving frame. The positioning block is located on one side of the chuck. The positioning block is conical and is rotatably connected to the moving frame. The moving frame is slidably connected to the workbench.

[0010] Preferably, two sliding grooves are provided on the workbench. Two sliding blocks are fixedly provided on the moving frame. The two sliding blocks correspond to the two sliding grooves one by one. The sliding blocks are arranged in the sliding grooves. The sliding blocks are locked to the workbench by screws.

[0011] Preferably, the moving assembly includes a lead screw. One end of the first lead screw is driven by a moving motor. A moving seat is connected to the first lead screw. The polishing device is arranged on the moving seat. The housing of the clamping motor is fixedly arranged on the moving seat.

[0012] Preferably, a collecting assembly is further included. The collecting assembly includes two cover shells. The two cover shells correspond to the two positioning strips one by one. The cover shell is fixedly connected to the moving block. The polishing block and the positioning strip are both located inside the cover shell. An air pipe is provided on the cover shell.

[0013] Preferably, a first baffle is arranged on the top of the moving seat. The first baffle is located between the moving seat and the cover shell. First inclined surfaces are arranged on both sides of the top of the baffle along the length direction of the first lead screw. The debris discharged when the two cover shells are separated slides along the first inclined surfaces to both sides of the moving seat along the length direction of the first lead screw. Second baffles are arranged on both sides of the moving seat along the length direction of the first lead screw. A chip discharge groove is provided on the workbench. The chip discharge groove is parallel to the first lead screw. The chip discharge groove extends to both sides of the workbench. Two pushing blocks are arranged on the moving seat. The two pushing blocks correspond to and match the two chip discharge grooves one by one. The pushing blocks are located in the chip discharge grooves. Second inclined surfaces are arranged on both sides of the top of the second baffle.

[0014] Preferably, the cover shell includes two cover bodies. The two cover shells are detachably and fixedly connected by bolts.

[0015] Preferably, two polishing blocks are connected to a single moving block. The two polishing blocks on the same moving block are respectively located on both sides of the positioning strip.

[0016] Compared with the prior art, the advantages of the present invention are as follows: The production process of a high-strength pipeline steel seamless steel pipe according to the present invention. During the polishing process of the seamless steel pipe, the ball on the positioning strip abuts against the seamless steel pipe to prevent radial deformation during the rotation of the seamless steel pipe, improving the dimensional accuracy of the seamless steel pipe. Moreover, during polishing, the debris generated during polishing can also be collected to prevent the debris from entering between the ball and the seamless steel pipe and causing deformation during the rotation of the seamless steel pipe, ensuring the dimensional accuracy of the seamless steel pipe. Moreover, the debris in the housing is conveyed to the chip discharge groove and pushed out by the push block, realizing the collection of debris. In addition, by abutting the positioning wheel against the seamless steel pipe, the position of the seamless steel pipe that is not being polished can be positioned, further ensuring the dimensional accuracy of the seamless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the polishing equipment; Figure 2 is a front view of the polishing equipment; Figure 3 is a top view of the polishing equipment; Figure 4 is a right view of the polishing equipment; Figure 5 is a schematic structural diagram of the workbench; Figure 6 is a schematic connection structure diagram of the chuck and the polishing motor; Figure 7 is a schematic connection structure diagram of the moving frame and the positioning block; Figure 8 is a schematic connection structure diagram of the moving component, the polishing device, the first positioning component and the collecting component; Figure 9 is a schematic connection structure diagram of the moving seat, the polishing device, the first positioning component and the collecting component; Figure 10 is a schematic connection structure diagram of the polishing device and the first positioning component; Figure 11 is a schematic structural diagram of the moving seat; Figure 12 is a schematic structural diagram of the second positioning component.

[0018] Wherein: workbench 1, drive component 2, polishing device 3, moving component 4, first positioning component 5, second positioning component 6, collecting component 7, seamless steel pipe 8; chuck 21, polishing motor 22, positioning block 23, moving frame 24, chute 25, slider 26, screw 27; second lead screw 31, clamping motor 32, moving block 33, polishing block 34; first lead screw 41, moving motor 42, moving seat 43; positioning strip 51, ball 52; The second positioning unit 61; The moving plate 611, the positioning wheel 612, the cylinder 613; The housing 71, the air pipe 72, the first baffle 73, the second baffle 74, the chip discharge groove 75, the pushing block 76; The housing body 711, the bolt 712. Specific implementation manners

[0019] As Figures 1-12 shown, a production process of a high-strength pipeline steel seamless steel pipe in this embodiment includes the following steps: Step 1, melting the steel billet; Melting the steel billet in a converter and an electric furnace equipment; Step 2, piercing; Piercing the steel billet through a piercing machine, and the steel billet becomes a seamless steel pipe 8 preform; Step 3, hot rolling; Processing the seamless steel pipe 8 preform through hot rolling to improve the organizational structure of the steel; Step 4, finish rolling; Processing the seamless steel pipe 8 obtained in Step 3 through finish rolling to improve the surface quality of the seamless steel pipe 8; Step 5, polishing treatment; Performing surface polishing on the seamless steel pipe 8 by using a polishing device; During polishing, positioning the seamless steel pipe 8 in the length direction and realizing the self-rotation of the seamless steel pipe 8 through the driving component 2. At the same time, polishing the seamless steel pipe 8 through the polishing device 3, and driving the polishing device 3 to move along the length direction of the seamless steel pipe 8 through the moving component 4. Among them, realizing the radial positioning of the polishing position of the seamless steel pipe 8 through the first positioning component 5, and realizing the radial positioning of other positions of the seamless steel pipe 8 through the second positioning component 6. In this way, radial deformation of the seamless steel pipe 8 is avoided, and the dimensional accuracy of the seamless steel pipe 8 is improved; In addition, collecting the chips generated during the polishing process through the collecting component 7 to avoid the chips from affecting the positioning effect of the first positioning component 5 on the seamless steel pipe 8; Step 6, performing rust prevention treatment on the seamless steel pipe 8; The polishing device includes a workbench 1, a driving component 2 and a polishing device 3 are arranged on the workbench 1. The driving component 2 is used to realize the positioning of the seamless steel pipe 8 in the length direction and drive the seamless steel pipe 8 to rotate. The moving component 4 is connected to the polishing device 3, and the moving component 4 is used to drive the polishing device 3 to move along the length direction of the seamless steel pipe 8. The polishing device 3 is used to perform the polishing action on the seamless steel pipe 8. The first positioning component 5 and the second positioning component 6 are arranged on the workbench 1; The driving assembly 2 includes a chuck 21, and the chuck 21 is driven by a polishing motor 22. During the polishing of the seamless steel pipe 8, one end of the seamless steel pipe 8 is fixedly arranged on the chuck 21. When the polishing motor 22 is started, the chuck 21 drives the seamless steel pipe 8 to rotate. The driving assembly 2 further includes a positioning block 23 and a moving frame 24. The positioning block 23 is located on one side of the chuck 21. The positioning block 23 is conical. The positioning block 23 is rotatably connected to the moving frame 24, and the moving frame 24 is slidably connected to the workbench 1. When fixing the seamless steel pipe 8, one end of the seamless steel pipe 8 is connected to the chuck 21, and the inner peripheral wall of the seamless steel pipe 8 is clamped by the jaws on the chuck 21. At the same time, the positioning block 23 abuts against the other end of the seamless steel pipe 8. When the seamless steel pipe 8 rotates, it drives the positioning block 23 to rotate synchronously on the moving frame 24. There are two sliding grooves 25 arranged on the workbench 1. Two sliding blocks 26 are fixedly arranged on the moving frame 24. The two sliding blocks 26 correspond to the two sliding grooves 25 one by one. The sliding blocks 26 are arranged in the sliding grooves 25, and the sliding blocks 26 are locked with the workbench 1 through screws 27. In fact, the length direction of the sliding groove 25 is parallel to the arrangement direction of the chuck 21 and the positioning block 23. When the seamless steel pipe 8 needs to be placed, the screw 27 is loosened to make the sliding block 26 move in the sliding groove 25, that is, to increase the distance between the positioning block 23 and the chuck 21. After the seamless steel pipe 8 is placed between the positioning block 23 and the chuck 21, one end of the seamless steel pipe 8 is abutted against the chuck 21 and the seamless steel pipe 8 is fixed through the chuck 21. Then, the sliding block 26 moves in the sliding groove 25 in the reverse direction, and the positioning block 23 is inserted into the other end of the seamless steel pipe 8. Finally, the screw 27 is tightened to lock between the sliding block 26 and the sliding groove 25, that is, the moving frame 24 and the workbench 1 are relatively fixed. The moving assembly 4 includes a lead screw. One end of the first lead screw 41 is driven by a moving motor 42. A moving seat 43 is connected to the first lead screw 41. The polishing device 3 is arranged on the moving seat 43. In fact, the first lead screw 41 is parallel to the sliding groove 25. During polishing, the moving motor 42 is started to make the first lead screw 41 rotate, so that the moving seat 43 moves on the first lead screw 41 and drives the polishing device 3 to move. In this way, the polishing device 3 can polish different positions of the seamless steel pipe 8 along the length direction. The polishing device 3 includes a second lead screw 31, one end of the second lead screw 31 is driven by a clamping motor 32, the housing of the clamping motor 32 is fixedly arranged on the moving seat 43, two moving blocks 33 are connected to the second lead screw 31, both of the two moving blocks 33 are threadedly connected to the second lead screw 31, the two moving blocks 33 are symmetrically arranged along the length direction of the second lead screw 31, the thread helix directions on the two moving blocks 33 are opposite, polishing blocks 34 are connected to both of the two moving blocks 33. In fact, the second lead screw 31 is a double-threaded screw. When the clamping motor 32 is started, the second lead screw 31 rotates, so that the two moving blocks 33 move closer to or away from each other on the second lead screw 31, and the second lead screw 31 is perpendicular to the first lead screw 41. Before installing the seamless steel pipe 8, the two moving blocks 33 are moved away from each other, the seamless steel pipe 8 is placed between the two moving blocks 33 and fixed by the driving assembly 2. After that, the two moving blocks 33 are moved closer to each other, and the polishing blocks 34 are abutted against the outer peripheral wall of the seamless steel pipe 8. When the seamless steel pipe 8 rotates, the polishing blocks 34 polish the outer peripheral wall of the seamless steel pipe 8. By moving the moving seat 43, the polishing blocks 34 polish other positions of the seamless steel pipe 8; The first positioning assembly 5 includes two positioning bars 51, the two positioning bars 51 correspond to the two moving blocks 33 one by one, the positioning bars 51 are fixedly arranged on the moving blocks 33, the two positioning blocks 23 are symmetrically arranged along the length direction of the second lead screw 31, the positioning bars 51 are arc-shaped, the arc openings of the two positioning bars 51 are arranged close to each other, and a plurality of balls 52 are rollingly embedded on the inner side wall of the positioning bars 51, and the plurality of balls 52 are circumferentially distributed; Two polishing blocks 34 are connected to a single moving block 33, and the two polishing blocks 34 on the same moving block 33 are respectively located on both sides of the positioning bar 51, that is, the positioning bar 51 and the two polishing blocks 34 connected to the same moving block 33 are distributed along the length direction of the seamless steel pipe 8; When the two moving blocks 33 move closer to each other, the polishing blocks 34 first abut against the outer peripheral wall of the seamless steel pipe 8. At this time, there is a gap between the balls 52 and the seamless steel pipe 8. After the seamless steel pipe 8 rotates and the polishing blocks 34 complete polishing, the balls 52 abut against the polished position. In this way, the polishing blocks 34 cannot polish this position of the seamless steel pipe 8. When the moving seat 43 moves, the polishing blocks 34 polish other positions of the seamless steel pipe 8. Among them, by the abutment of the balls 52 against the seamless steel pipe 8, radial deformation of the seamless steel pipe 8 during rotation can be avoided, and the dimensional accuracy of the seamless steel pipe 8 can be improved; It further includes a collection component 7, and the collection component 7 includes two housings 71. The two housings 71 correspond to the two positioning bars 51 one by one. The housing 71 is fixedly connected to the moving block 33. Both the polishing block 34 and the positioning bar 51 are located inside the housing 71. An air pipe 72 is provided on the housing 71. During polishing, as the two moving blocks 33 approach and move, the two housings 71 enclose the seamless steel pipe 8. And the air pipe 72 is connected to an air extraction system. Through the air extraction system, the air inside the housing 71 is discharged from the air pipe 72, while the air outside the housing 71 enters the housing 71 through the gap between the housing 71 and the seamless steel pipe 8. Under the action of the air flow, the debris generated during the polishing process is intercepted at the bottom inside the housing 71, preventing the debris from entering between the ball 52 and the seamless steel pipe 8 and causing deformation during the rotation of the seamless steel pipe 8, ensuring the dimensional accuracy of the seamless steel pipe 8. In fact, threads are installed inside the air pipe 72 to prevent debris from being discharged from the air pipe 72; A first baffle 73 is provided at the top of the moving seat 43. The first baffle 73 is located between the moving seat 43 and the housing 71. First inclined surfaces are provided on both sides of the top of the baffle along the length direction of the first lead screw 41. Through the first inclined surfaces, the debris discharged when the two housings 71 are separated slides along the first inclined surfaces to both sides of the moving seat 43 along the length direction of the first lead screw 41. Second baffles 74 are provided on both sides of the moving seat 43 along the length direction of the first lead screw 41. A chip discharge groove 75 is provided on the workbench 1. The chip discharge groove 75 is parallel to the first lead screw 41. The chip discharge groove 75 extends to both sides of the workbench 1. Two push blocks 76 are provided on the moving seat 43. The two push blocks 76 correspond to and match the two chip discharge grooves 75 one by one. The push block 76 is located inside the chip discharge groove 75. Second inclined surfaces are provided on both sides of the top of the second baffle 74. Specifically, the second baffle 74 is in an inverted V shape. Through the second inclined surfaces, the debris sliding on the first baffle 73 is moved into the chip discharge groove 75. When the moving seat 43 moves, it drives the push block 76 to move inside the chip discharge groove 75, so that the push block 76 discharges the debris inside the chip discharge groove 75. Among them, collection containers can be provided at both ends of the chip discharge groove 75 to collect the debris discharged from the chip discharge groove 75; The housing 71 includes two housing bodies 711. The two housings 71 are detachably and fixedly connected by bolts 712; The second positioning component 6 includes multiple groups of second positioning units 61. The multiple groups of second positioning units 61 are distributed along the length direction of the second lead screw 31. Each group of second positioning units 61 has two. The two second positioning units 61 in the same group correspond to the two positioning bars 51 one by one; The second positioning unit 61 includes a moving plate 611, on which two positioning wheels 612 are arranged. The two positioning wheels 612 are distributed vertically. A cylinder 613 is connected to the moving plate 611. The cylinder 613 is used to drive the moving plate 611 to move along the length direction of the second lead screw 31. During the polishing of the seamless steel pipe 8, the positioning wheels 612 are abutted against the seamless steel pipe 8. In this way, the positioning effect of the seamless steel pipe 8 is improved. When the polishing block 34 moves to the position where the positioning wheels 612 are abutted against the seamless steel pipe 8 along with the polishing progress, the cylinder 613 is used to drive the moving plate 611 to move away from the seamless steel pipe 8, so that the positioning wheels 612 are separated from the seamless steel pipe 8. After the seamless steel pipe 8 at this position is polished and the polishing block 34 moves to the position of other positioning wheels 612, the cylinder 613 is used to drive the moving plate 611 to move in the reverse direction, so that the positioning wheels 612 at this position position the seamless steel pipe 8 again; To sum up, during the polishing process of the seamless steel pipe 8, the ball 52 on the positioning strip 51 abuts against the seamless steel pipe 8, avoiding radial deformation during the rotation of the seamless steel pipe 8 and improving the dimensional accuracy of the seamless steel pipe 8. Moreover, during polishing, the debris generated during polishing can also be collected to prevent the debris from entering between the ball 52 and the seamless steel pipe 8 and causing deformation during the rotation of the seamless steel pipe 8, ensuring the dimensional accuracy of the seamless steel pipe 8. Moreover, the debris in the cover 71 is conveyed into the chip discharge groove 75 and pushed out by the push block 76, realizing the collection of the debris. In addition, by abutting the positioning wheels 612 against the seamless steel pipe 8, the position of the seamless steel pipe 8 that is not being polished can be positioned, further ensuring the dimensional accuracy of the seamless steel pipe 8.

[0020] In addition to the above embodiments, the present invention also includes other implementation manners. Any technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present invention.

Claims

1. A production process for seamless steel pipes of high-strength pipeline steel, characterized in that: It includes the following steps: Step 1, melting the steel billet; Step 2, piercing; Step 3, hot rolling; Step 4, finish rolling; Step 5, polishing treatment; Using a polishing device to polish the surface of the seamless steel pipe (8); During polishing, the positioning of the seamless steel pipe (8) in the length direction and the rotation of the seamless steel pipe (8) are realized through the driving component (2). At the same time, the polishing of the seamless steel pipe (8) is realized through the polishing device (3), and the polishing device (3) is driven to move along the length direction of the seamless steel pipe (8) through the moving component (4). Among them, the radial positioning of the polishing position of the seamless steel pipe (8) is realized through the first positioning component (5), and the radial positioning of other positions of the seamless steel pipe (8) is realized through the second positioning component (6), so as to avoid radial deformation of the seamless steel pipe (8) and improve the dimensional accuracy of the seamless steel pipe (8); In addition, the collection of debris generated during the polishing process is realized through the collection component (7) to avoid the influence of the debris on the positioning effect of the first positioning component (5) on the seamless steel pipe (8); Step 6, performing an anti-rust treatment on the seamless steel pipe (8).

2. The production process of a high-strength pipeline steel seamless steel pipe according to claim 1, characterized in that: The polishing device includes a workbench (1), on which a driving component (2) and a polishing device (3) are arranged. The driving component (2) is used to realize the positioning of the seamless steel pipe (8) in the length direction and drive the seamless steel pipe (8) to rotate. A moving component (4) is connected to the polishing device (3), and the moving component (4) is used to drive the polishing device (3) to move along the length direction of the seamless steel pipe (8). The polishing device (3) is used to perform the polishing action on the seamless steel pipe (8). A first positioning component (5) and a second positioning component (6) are arranged on the workbench (1); The polishing device (3) includes a second lead screw (31), one end of the second lead screw (31) is driven by a clamping motor (32), two moving blocks (33) are connected to the second lead screw (31), both moving blocks (33) are threadedly connected to the second lead screw (31), the two moving blocks (33) are symmetrically arranged along the length direction of the second lead screw (31), the thread directions of the two moving blocks (33) are opposite, and polishing blocks (34) are connected to both moving blocks (33); The first positioning component (5) includes two positioning strips (51), the two positioning strips (51) correspond to the two moving blocks (33) one by one, the positioning strips (51) are fixedly arranged on the moving blocks (33), the two positioning blocks (23) are symmetrically arranged along the length direction of the second lead screw (31), the positioning strips (51) are arc-shaped, the arc openings of the two positioning strips (51) are arranged close to each other, and a plurality of balls (52) are rollingly embedded on the inner side wall of the positioning strips (51); The second positioning component (6) includes multiple groups of second positioning units (61), the multiple groups of second positioning units (61) are distributed along the length direction of the second lead screw (31), each group of second positioning units (61) has two, and the two second positioning units (61) in the same group correspond to the two positioning strips (51) one by one; The second positioning unit (61) includes a moving plate (611) provided with two positioning wheels (612) distributed vertically. A cylinder (613) is connected to the moving plate (611) and is used to drive the moving plate (611) to move along the length direction of the second lead screw (31).

3. The production process of a high-strength pipeline steel seamless steel pipe according to claim 2, characterized in that: The driving assembly (2) includes a chuck (21) driven by a polishing motor (22).

4. The production process of a high-strength pipeline steel seamless steel pipe according to claim 3, characterized in that: The driving assembly (2) further includes a positioning block (23) and a moving bracket (24). The positioning block (23) is located on one side of the chuck (21), is conical, is rotatably connected to the moving bracket (24), and the moving bracket (24) is slidably connected to the workbench (1).

5. The production process of a high-strength pipeline steel seamless steel pipe according to claim 4, characterized in that: Two sliding grooves (25) are provided on the workbench (1). Two sliding blocks (26) are fixedly provided on the moving bracket (24). The two sliding blocks (26) correspond to the two sliding grooves (25) one by one. The sliding blocks (26) are arranged in the sliding grooves (25) and are locked to the workbench (1) by screws (27).

6. The production process of a high-strength pipeline steel seamless steel pipe according to claim 2, characterized in that: The moving assembly (4) includes a lead screw. One end of the first lead screw (41) is driven by a moving motor (42). A moving seat (43) is connected to the first lead screw (41). The polishing device (3) is arranged on the moving seat (43), and the housing of the clamping motor (32) is fixedly arranged on the moving seat (43).

7. The production process of a high-strength pipeline steel seamless steel pipe according to claim 6, characterized in that: A collection assembly (7) is further included. The collection assembly (7) includes two cover shells (71) corresponding to the two positioning strips (51) one by one. The cover shells (71) are fixedly connected to the moving block (33). The polishing block (34) and the positioning strip (51) are both located inside the cover shells (71). An air pipe (72) is provided on the cover shells (71).

8. The production process of a high-strength pipeline steel seamless steel pipe according to claim 7, characterized in that: A first baffle (73) is arranged on the top of the moving seat (43) and is located between the moving seat (43) and the cover shell (71). First inclined surfaces are arranged on both sides of the top of the baffle along the length direction of the first lead screw (41). The debris discharged when the two cover shells (71) are separated slides along the first inclined surfaces to both sides of the moving seat (43) along the length direction of the first lead screw (41). Second baffles (74) are arranged on both sides of the moving seat (43) along the length direction of the first lead screw (41). A chip discharge groove (75) is provided on the workbench (1). The chip discharge groove (75) is parallel to the first lead screw (41) and extends to both sides of the workbench (1). Two pushing blocks (76) are arranged on the moving seat (43). The two pushing blocks (76) correspond to and match the two chip discharge grooves (75) one by one. The pushing blocks (76) are located in the chip discharge grooves (75). Second inclined surfaces are arranged on both sides of the top of the second baffle (74).

9. The production process of a high-strength pipeline steel seamless steel pipe according to claim 7, characterized in that: The cover shell (71) includes two cover bodies (711), and the two cover shells (71) are detachably and fixedly connected by bolts (712).

10. The production process of a high-strength pipeline steel seamless steel pipe according to claim 2, characterized in that: Two polishing blocks (34) on a single moving block (33) are connected, and the two polishing blocks (34) on the same moving block (33) are respectively located on both sides of the positioning bar (51).

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