Finish rolling equipment of thin-wall seamless steel pipe and finish rolling process thereof

Abstract

The invention belongs to the technical field of steel pipe production, and particularly relates to finish rolling equipment for a thin-wall seamless steel pipe and a finish rolling process thereof.The finish rolling equipment for the thin-wall seamless steel pipe comprises a machine base, and a rolling mill assembly, a sliding driving assembly and a cleaning assembly are arranged on the machine base. The rolling mill assembly comprises a rack, two rollers which are opposite up and down are rotationally arranged on the rack, and rolling grooves used for rolling steel pipes are formed in the rollers in the peripheral direction; the sliding driving assembly is used for driving the rolling mill assembly to slide back and forth on the machine base. The cleaning assembly is used for removing chippings and sundries in a rolling groove of the roller. A rotation driving assembly is arranged between the rolling mill assembly and the machine base and used for enabling the rollers to rotate. By arranging the cleaning assembly, chippings generated by steel pipe rolling and left on the surface of the roller after rolling can be cleaned, the surface quality and diameter control of the steel pipe after finish rolling are guaranteed, and the finish rolling precision and quality are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe production, and in particular relates to a finishing rolling device and a finishing rolling process for a thin-walled seamless steel pipe. Background Art

[0002] Currently, the production of small-diameter, thin-walled seamless steel pipes relies primarily on traditional cold drawing and cold rolling processes. These processes rely on multiple annealing, pickling, phosphating, and calcining processes, resulting in low production efficiency, multiple steps, high energy consumption, and low yield rates. Furthermore, the pickling wastewater poses a serious environmental pollution risk, severely impacting the ability to manufacture small-diameter, thin-walled seamless steel pipes. For special materials, high-precision small-diameter, thin-walled seamless steel pipes can only be produced through multiple cold drawing and annealing processes. The three-roll cross-rolling mill can only produce medium- and thick-walled seamless steel pipes. When rolling small-diameter, thin-walled steel pipes, the force and deformation applied by the three-roll cross-rolling mill can easily cause the pipes to become twisted. Therefore, it is difficult to implement the three-roll cross-rolling technology for rolling small-diameter, thin-walled seamless steel pipes.

[0003] The two-roller cold rolling mill is a cold rolling mill that uses variable-section rolling grooves and tapered mandrels, and relies on the reciprocating motion of the machine base to periodically roll the rough tube in sections. The rolling mill base is driven by a crank-connecting rod mechanism to reciprocate, and the two rollers are installed on the machine base, one above and one below. In order to make the upper and lower rollers rotate synchronously in opposite directions, one end of each roller shaft is equipped with a gear with the same number of teeth and module, which meshes with the rack fixed on the machine base. When the machine base reciprocates once, the tube billet is fed a section in the rolling direction, thereby completing the rolling of the tube billet when the machine base continues to reciprocate.

[0004] After rolling, the existing two-roll cold rolling mill will leave steel pipe debris on the roll surface. The debris will become hot and stick to the roll due to squeezing and rolling with the roll. Such debris sticking to the roll will affect the surface quality of the steel pipe after finish rolling and the control of the diameter size. Summary of the Invention

[0005] The purpose of the present invention is to provide a thin-walled seamless steel pipe finishing rolling equipment and finishing rolling process thereof in order to improve the finishing rolling accuracy and quality.

[0006] In view of this, the present invention provides a finishing rolling equipment for thin-walled seamless steel pipes, comprising a machine base, on which are provided: A rolling mill assembly, comprising a frame on which two rollers are rotatably mounted facing each other, each roller having a rolling groove formed along its circumference for rolling the steel pipe; A sliding drive assembly, the sliding drive assembly is used to drive the rolling mill assembly to slide back and forth on the machine stand; A cleaning assembly, the cleaning assembly being used to remove debris and sundries in the rolling groove of the roller; Among them, a rotation drive assembly is provided between the rolling mill assembly and the machine base for rotating the rollers.

[0007] In this technical solution, by setting up a cleaning component, the debris generated by rolling the steel pipe left on the surface of the roller after rolling can be cleaned, thereby ensuring the surface quality of the steel pipe after finish rolling and controlling the diameter size, and improving the finish rolling accuracy and quality.

[0008] Furthermore, the cleaning assembly includes a cleaning frame, on which two cleaning brushes are coaxially arranged, one cleaning brush corresponding to each roller, and the axis of the cleaning brush is arranged on one side of the roller perpendicular to the axis of the roller. The two cleaning brushes share a power source and rotate synchronously to clean the rolling groove of the corresponding roller respectively.

[0009] In this technical solution, the axis of the cleaning brush is set perpendicular to the axis of the roller, so that the debris can be swept out along the tangential direction of the roller circumference, which can reduce the debris from falling onto the roller again. The two cleaning brushes share a power source and rotate synchronously to clean the two rollers respectively, which can reduce the input of power source.

[0010] Furthermore, the cleaning frame is also provided with a self-adjusting component, which is used for the two cleaning brushes to independently adjust the rotation speed.

[0011] The rollers rotate in opposite directions during the finishing process, so that the direction of the force applied to the cleaning brush in the direction parallel to the axis of the cleaning brush will change back and forth. Therefore, although such repeated force changes will improve the cleaning efficiency and effect, the hair on the cleaning brush will fall off more seriously than in normal use, and some of the debris on the upper roller will fall and stick to the lower roller. Therefore, under normal circumstances, the adhesion of debris on the lower roller will be slightly more serious than that on the upper roller, but in some cases, the adhesion of debris at a local position on the upper roller will be more serious than that on the lower roller. This will cause the upper and lower cleaning brushes to be subjected to different resistance, resulting in mutual pulling, which will aggravate the problem of hair loss of the cleaning brush. The self-adjusting component can slow down the rotation speed of the cleaning brush subjected to greater resistance when the degree of debris adhesion on the upper and lower rollers is inconsistent, thereby eliminating the influence of pulling between the two cleaning brushes and alleviating the problem of hair loss of the cleaning brush.

[0012] Furthermore, the self-adjusting component includes: A first rotating shaft is rotatably mounted on the cleaning frame, wherein a cleaning brush is fixedly sleeved on the first rotating shaft, and a first bevel gear is also fixedly sleeved on the first rotating shaft; A second rotating shaft is rotatably mounted on the cleaning frame and is coaxial with the first rotating shaft. Another cleaning brush is fixedly sleeved on the second rotating shaft. A second bevel gear is also fixedly sleeved on the second rotating shaft. A driving bevel gear, which is rotatably mounted on the cleaning frame and connected to a power source and can rotate circumferentially, and an axis of the driving bevel gear is perpendicular to the circumference of the first rotating shaft; A driven bevel gear, which is rotatably sleeved on the first rotating shaft and meshes with the driving bevel gear, and two fixing plates extend from the end of the driven bevel gear; There are two adjusting bevel gears in total. The two adjusting bevel gears are rotatably arranged on two fixed plates respectively, and the two sides of the adjusting bevel gears are respectively engaged with the first bevel gear and the second bevel gear.

[0013] In the present technical solution, during normal operation, the power source drives the active bevel gear and the adjusting bevel gear to rotate, so that the two fixed plates and the adjusting bevel gear all rotate around the first rotating shaft, thereby driving the first bevel gear, the second bevel gear, the first rotating shaft and the second rotating shaft to rotate around their own axes, so that the two cleaning brushes rotate synchronously to clean the rollers. When the debris on the two rollers adheres to different rotation states, the two cleaning brushes are subjected to different resistances and will rotate asynchronously. At this time, the rotation speeds of the first bevel gear and the second bevel gear on both sides of the adjusting bevel gear are different, so the adjusting bevel gear will rotate, thereby eliminating the speed difference between the first rotating shaft and the second rotating shaft, thereby preventing the two cleaning brushes from pulling between the two due to different resistances and reducing the serious problem of hair loss of the cleaning brushes.

[0014] Furthermore, protrusions extend outward on both sides of the cleaning frame, and a slide groove for accommodating the protrusions is opened on the frame. The protrusions are slidably set in the slide groove, and a positioning spring is set between the end of the protrusion and the inner wall of the slide groove. The positioning spring always has a movement tendency to push the cleaning frame toward the roller.

[0015] In this technical solution, since the depth of the rolling groove of the roller changes in the circumferential direction of the roller, the positioning spring always has a tendency to push the cleaning frame toward the roller. When the roller rotates, if the position with a shallow groove depth rotates to the cleaning brush, it will have a greater extrusion force on the cleaning brush, which can squeeze and compress the positioning spring to move the cleaning frame away from the roller, thereby preventing excessive pressure between the cleaning brush and the roller, causing serious hair loss of the cleaning brush. When the roller continues to rotate so that the position with a deeper rolling groove faces the cleaning brush, the positioning spring gradually resets. The modified structure can make the position of the cleaning frame change with the change of the depth of the rolling groove during rotation, so that the cleaning brush and the bottom of the rolling groove always maintain a suitable contact pressure, ensuring the cleaning effect while protecting the cleaning brush.

[0016] Furthermore, the sliding drive assembly includes: A turntable rotatably connected to the machine base; A drive shaft connected to the machine base, a drive wheel circumferentially fixedly sleeved on the drive shaft, and transmission teeth are provided on the outer circumference of the drive wheel and the turntable and mesh with each other; A swing lever, one end of which is eccentrically hinged to the turntable and the other end of which is hinged to the frame; A slip drive motor is connected to a flywheel via a belt, and the flywheel is connected to a drive shaft.

[0017] In this technical solution, the sliding drive motor is started and the rotation is transmitted to the flywheel through the belt. The rotation of the flywheel causes the drive shaft and the drive wheel to rotate, thereby rotating the turntable. Because one end of the swing arm is eccentrically connected to the turntable and the other end is hinged to the machine base, the rolling mill assembly can be driven to move back and forth during the continuous rotation of the turntable.

[0018] Furthermore, the rotation drive assembly includes: There are two rotating wheels, which are fixed and coaxially sleeved on the outer ends of the roller; There are two racks, which are fixed on the machine base and meshed with the rotating wheels respectively.

[0019] In this technical solution, when the sliding drive assembly drives the rolling mill assembly to move back and forth, the two rotating wheels engage with the rack. Since the rack is fixed and the rotating wheel moves with the rolling roller and the rolling mill assembly, the rack will cause the rotating wheel to rotate, thereby causing the rolling roller to rotate and achieve finish rolling of the steel pipe.

[0020] Furthermore, a first baffle is sleeved on the first rotating shaft between the driven bevel gear and the cleaning brush, and the first baffle is fixedly connected to the cleaning frame.

[0021] Furthermore, a second baffle is sleeved on the second rotating shaft between the second bevel gear and the cleaning brush, and the second baffle is fixedly connected to the cleaning frame.

[0022] In this technical solution, the first baffle plate and the second baffle plate can reduce the amount of cleaned debris splashing onto the gears of the self-adjusting assembly.

[0023] Furthermore, the finishing rolling process comprises the following steps: S1: Heating, heating the tube billet to above 1150°C in a heating furnace; S2: Punching, the heated tube blank is punched by a punching machine to make a rough tube; S3: Rolling: The rough tube is passed through the finishing rolling equipment and the rollers are reciprocated to reduce the diameter. The two cleaning brushes on the sides of the rollers rotate synchronously to clean the rolling grooves of the two rollers respectively. At the same time, the two cleaning brushes can automatically fine-tune their rotation speed according to the resistance caused by the adhesion of debris; S4: Tube removal, the rolled rough tube is removed from the mandrel; S5: Finished product collection, straightening, cutting, inspection, packaging, marking and storage of finished pipes.

[0024] The beneficial effects of the present invention are: 1. By setting up the cleaning component, the debris left on the surface of the roller after rolling due to the rolling of the steel pipe can be cleaned, so as to ensure the surface quality of the steel pipe after finishing and the control of the diameter size, and improve the finishing accuracy and quality.

[0025] 2. The axis of the cleaning brush is set perpendicular to the axis of the roller, so that the debris can be cleaned out along the tangential direction of the roller circumference, which can reduce the debris from falling onto the roller again. The two cleaning brushes share a power source and rotate synchronously to clean the two rollers respectively, which can reduce the input of power source.

[0026] 3. The self-adjusting component can slow down the rotation speed of the cleaning brush that is subject to greater resistance when the degree of debris adhesion on the upper and lower rollers is inconsistent, thereby eliminating the effect of pulling between the two cleaning brushes and alleviating the problem of hair loss of the cleaning brush.

[0027] 4. The position adjustment spring structure can make the position of the cleaning frame change with the change of the depth of the rolling trough during rotation, so that the cleaning brush and the bottom of the rolling trough always maintain an appropriate contact pressure, ensuring the cleaning effect while protecting the cleaning brush.

[0028] 5. The first baffle and the second baffle can reduce the debris from being cleaned and splashed onto the gears of the self-adjusting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of the finishing equipment; Figure 2 It is a stereogram of the finishing equipment from another perspective; Figure 3 It is a partial schematic diagram of the finishing rolling equipment; Figure 4 yes Figure 3 Schematic diagram from another perspective; Figure 5 It is a cross-sectional view at the rolling mill assembly; Figure 6 It is a stereogram of the cleaning assembly; Figure 7 yes Figure 3 A partial enlarged view of point A in the middle.

[0030] The marks in the figure are: 1. Machine base; 2. Rolling mill assembly; 3. Frame; 4. Roller; 5. Cleaning assembly; 6. Sliding drive assembly; 7. Turntable; 8. Drive shaft; 9. Drive wheel; 10. Swing rod; 11. Sliding drive motor; 12. Belt; 13. Flywheel; 14. Rotating wheel; 15. Rack; 16. Rolling trough; 17. Cleaning rack; 18. Cleaning brush; 19. First rotating shaft; 20. First bevel gear; 21. Second rotating shaft; 22. Second bevel gear; 23. Driving bevel gear; 24. Power source; 25. Driven bevel gear; 26. Fixed plate; 27. Adjusting bevel gear; 28. Bump; 29. ​​Slide; 30. Adjusting spring; 31. First baffle; 32. Second baffle. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0032] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0033] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0034] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0035] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0036] Example 1: like Figure 1-4 As shown, a finishing rolling equipment for thin-walled seamless steel pipes includes a machine base 1, on which are provided: A rolling mill assembly 2, comprising a frame 3, on which two rollers 4 are rotatably mounted, each roller 4 being provided with a rolling groove 16 for rolling the steel pipe along its circumferential direction, wherein the depth of the rolling groove 16 gradually changes along its circumferential direction; A sliding drive assembly 6, which is used to drive the rolling mill assembly 2 to slide back and forth on the stand 1; A cleaning assembly 5, which is used to remove debris and foreign matter from the rolling groove 16 of the roller 4; A rotation drive assembly is provided between the rolling mill assembly 2 and the stand 1 for rotating the rollers 4 .

[0037] By setting up the cleaning component 5, the debris left on the surface of the roller 4 after rolling due to the rolling of the steel pipe can be cleaned, thereby ensuring the surface quality of the steel pipe after finish rolling and controlling the diameter size, and improving the finish rolling accuracy and quality.

[0038] The sliding drive assembly 6 includes: A turntable 7, the turntable 7 being rotatably connected to the base 1; A drive shaft 8 is connected to the base 1, and a drive wheel 9 is circumferentially fixedly sleeved on the drive shaft 8. The drive wheel 9 and the outer circumference of the turntable 7 are both provided with transmission teeth and mesh with each other; A swing arm 10, one end of which is eccentrically hinged to the turntable 7 and the other end of which is hinged to the frame 3; A slip drive motor 11 is connected to a flywheel 13 via a belt 12 , and the flywheel 13 is connected to the drive shaft 8 .

[0039] The sliding drive motor 11 is started and the rotation is transmitted to the flywheel 13 through the belt 12. The rotation of the flywheel 13 rotates the drive shaft 8 and the drive wheel 9, thereby rotating the turntable 7. Because one end of the swing arm 10 is eccentrically connected to the turntable 7 and the other end is hinged to the machine base 1, during the continuous rotation of the turntable 7, the rolling mill assembly 2 can be driven to move back and forth.

[0040] The rotation drive assembly includes: There are two rotating wheels 14, which are fixed and coaxially sleeved on the outer ends of the roller 4; There are two racks 15 , which are fixed on the machine base 1 and mesh with the rotating wheel 14 respectively.

[0041] In the process of the sliding drive assembly 6 driving the rolling mill assembly 2 to move back and forth, the two rotating wheels 14 are engaged with the rack 15. Since the rack 15 is fixed and the rotating wheel 14 moves with the rolling roller 4 and the rolling mill assembly 2, the rack 15 will cause the rotating wheel 14 to rotate, thereby causing the rolling roller 4 to rotate, thereby achieving finish rolling of the steel pipe.

[0042] Example 2: like Figure 4-6 As shown, the cleaning assembly 5 includes a cleaning frame 17, on which two cleaning brushes 18 are coaxially arranged. Each roller 4 corresponds to a cleaning brush 18, and the axis of the cleaning brush 18 is arranged on one side of the roller 4 perpendicular to the axis of the roller 4. The two cleaning brushes 18 share a power source 24 and rotate synchronously to clean the rolling groove 16 of the corresponding roller 4 respectively.

[0043] By setting the axis of the cleaning brush 18 perpendicular to the axis of the roller 4, debris can be cleaned out along the tangential direction of the circumference of the roller 4, which can reduce the debris from falling onto the roller 4 again. The two cleaning brushes 18 share the power source 24 and rotate synchronously to clean the two rollers 4 respectively, which can reduce the input of the power source 24.

[0044] The cleaning frame 17 is further provided with a self-adjusting component, which is used for the two cleaning brushes 18 to independently adjust the rotation speed.

[0045] The cleaning brush 18 rotates in one direction all the time, and the axis of the cleaning brush 18 is perpendicular to the axis of the roller 4, so that the cleaning brush 18 is subjected to a force parallel to the axis of the cleaning brush 18 while rotating and cleaning, and the roller 4 rotates back and forth in the process of finishing, so that the direction of the force parallel to the axis of the cleaning brush 18 on the cleaning brush 18 changes back and forth, such as Figure 5 As shown, although such repeated force changes will improve the efficiency and effect of cleaning, the hair on the cleaning brush 18 will fall off more seriously than in normal use, and some of the debris on the upper roller 4 will fall and stick to the lower roller 4. Therefore, under normal circumstances, the adhesion of debris on the lower roller 4 will be slightly more serious than that of the upper roller 4, but there are also some cases where the adhesion of debris at a local position on the upper roller 4 is more serious than that of the lower roller 4. In this way, the upper and lower cleaning brushes 18 will be subjected to different resistances, resulting in mutual pulling, which further aggravates the problem of hair falling from the cleaning brush 18. The self-adjusting component can slow down the rotation speed of the cleaning brush 18 that is subjected to greater resistance when the degree of debris adhesion on the upper and lower rollers 4 is inconsistent, thereby eliminating the influence of pulling between the two cleaning brushes 18 and alleviating the problem of hair falling from the cleaning brush 18.

[0046] The self-adjusting component comprises: A first rotating shaft 19 is rotatably mounted on the cleaning frame 17. A cleaning brush 18 is fixedly sleeved on the first rotating shaft 19. A first bevel gear 20 is also fixedly sleeved on the first rotating shaft 19. The second rotating shaft 21 is rotatably mounted on the cleaning frame 17 and is coaxial with the first rotating shaft 19. Another cleaning brush 18 is fixedly mounted on the second rotating shaft 21. A second bevel gear 22 is also fixedly mounted on the second rotating shaft 21. A driving bevel gear 23 is rotatably mounted on the cleaning frame 17 and connected to a power source 24 for circumferential rotation. The axis of the driving bevel gear 23 is circumferentially perpendicular to the first rotating shaft 19. A driven bevel gear 25 is rotatably sleeved on the first rotating shaft 19 and meshes with the driving bevel gear 23. Two fixing plates 26 extend from the ends of the driven bevel gear 25. There are two adjusting bevel gears 27 , and the two adjusting bevel gears 27 are rotatably disposed on the two fixing plates 26 , and two sides of the adjusting bevel gears 27 are respectively engaged with the first bevel gear 20 and the second bevel gear 22 .

[0047] During normal operation, the power source 24 drives the active bevel gear 23 and the adjusting bevel gear 27 to rotate, so that the two fixed plates 26 and the adjusting bevel gear 27 rotate around the first rotating shaft 19, thereby driving the first bevel gear 20, the second bevel gear 22, the first rotating shaft 19 and the second rotating shaft 21 to rotate around their own axes, so that the two cleaning brushes 18 rotate synchronously to clean the roller 4. When the debris on the two rollers 4 adheres to different rotation states, the two cleaning brushes 18 are subjected to different resistances and will rotate asynchronously. At this time, the rotation speeds of the first bevel gear 20 and the second bevel gear 22 on both sides of the adjusting bevel gear 27 are different, so the adjusting bevel gear 27 will rotate, thereby eliminating the speed difference between the first rotating shaft 19 and the second rotating shaft 21, thereby preventing the two cleaning brushes 18 from pulling between the two due to different resistances, and reducing the serious problem of hair loss of the cleaning brushes 18.

[0048] Example 3: like Figure 7 As shown, protrusions 28 extend outwardly on both sides of the cleaning frame 17, and a slide groove 29 for accommodating the protrusion 28 is opened on the frame 3. The protrusion 28 is slidably set in the slide groove 29, and a positioning spring 30 is provided between the end of the protrusion 28 and the inner wall of the slide groove 29. The positioning spring 30 always has a movement tendency to push the cleaning frame 17 toward the roller 4.

[0049] Because the depth of the rolling groove 16 of the roller 4 changes in the circumferential direction of the roller 4, the adjusting spring 30 always has a movement tendency to push the cleaning frame 17 toward the roller 4. When the roller 4 rotates, if the position with a shallow groove depth rotates to the cleaning brush 18, it will have a greater extrusion force on the cleaning brush 18, and the compressing adjusting spring 30 can be squeezed to move the cleaning frame 17 in the direction away from the roller 4 to prevent the pressure between the cleaning brush 18 and the roller 4 from being too high, causing serious hair loss of the cleaning brush 18. When the roller 4 continues to rotate so that the position with a deeper rolling groove 16 is facing the cleaning brush 18, the adjusting spring 30 is gradually reset. Setting this structure can make the position of the cleaning frame 17 change with the change of the depth of the rolling groove 16 during the rotation process, so that the cleaning brush 18 and the bottom of the rolling groove 16 always maintain a suitable contact pressure, ensuring the cleaning effect while protecting the cleaning brush 18.

[0050] Example 4: like Figure 6 As shown, a first baffle 31 is sleeved on the first rotating shaft 19 between the driven bevel gear 25 and the cleaning brush 18, and the first baffle 31 is fixedly connected to the cleaning frame 17. A second baffle 32 is sleeved on the second rotating shaft 21 between the second bevel gear 22 and the cleaning brush 18, and the second baffle 32 is fixedly connected to the cleaning frame 17.

[0051] The first baffle plate 31 and the second baffle plate 32 can reduce the amount of debris that is cleaned from splashing onto the gears of the self-adjusting assembly.

[0052] The finishing rolling process comprises the following steps: S1: Heating, heating the tube billet to above 1150°C in a heating furnace; S2: Punching, the heated tube blank is punched by a punching machine to make a rough tube; S3: Rolling, the rough tube passes through the finishing equipment and is reciprocated by the roller 4 to reduce its diameter. The two cleaning brushes 18 on the side of the roller 4 rotate synchronously to clean the rolling grooves 16 of the two rollers 4 respectively. At the same time, the two cleaning brushes 18 can automatically fine-tune their rotation speed according to the resistance caused by the adhesion of debris; S4: Tube removal, the rolled rough tube is removed from the mandrel; S5: Finished product collection, straightening, cutting, inspection, packaging, marking and storage of finished pipes.

[0053] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A finishing rolling equipment for thin-walled seamless steel pipes, characterized in that: The machine base (1) is provided with: A rolling mill assembly (2), the rolling mill assembly (2) comprising a frame (3), two rollers (4) rotatably arranged in an upper and lower relative manner on the frame (3), and rolling grooves (16) for rolling steel pipes are provided on the rollers (4) along the circumferential direction; A sliding drive assembly (6), the sliding drive assembly (6) being used to drive the rolling mill assembly (2) to slide back and forth on the stand (1); A cleaning assembly (5), the cleaning assembly (5) being used to remove debris and foreign matter from the rolling groove (16) of the roller (4); A rotation drive assembly is provided between the rolling mill assembly (2) and the machine base (1) for rotating the rolling roller (4).

2. The finishing equipment for thin-walled seamless steel pipe according to claim 1, characterized in that: The cleaning assembly (5) comprises a cleaning frame (17), on which two cleaning brushes (18) are coaxially arranged. Each roller (4) corresponds to one cleaning brush (18), and the axis of the cleaning brush (18) is arranged on one side of the roller (4) perpendicularly to the axis of the roller (4). The two cleaning brushes (18) share a power source (24) and rotate synchronously to clean the rolling groove (16) of the corresponding roller (4).

3. The finishing rolling equipment for thin-walled seamless steel pipe according to claim 2, characterized in that: The cleaning frame (17) is also provided with a self-adjusting component, which is used for the two cleaning brushes (18) to independently adjust the rotation speed.

4. The finishing rolling equipment for thin-walled seamless steel pipe according to claim 3, characterized in that: The self-adjusting component comprises: A first rotating shaft (19), the first rotating shaft (19) is rotatably mounted on the cleaning frame (17), wherein a cleaning brush (18) is fixedly sleeved on the first rotating shaft (19), and a first bevel gear (20) is also fixedly sleeved on the first rotating shaft (19); A second rotating shaft (21), the second rotating shaft (21) is rotatably mounted on the cleaning frame (17) and is coaxial with the first rotating shaft (19), another cleaning brush (18) is fixedly sleeved on the second rotating shaft (21), and a second bevel gear (22) is also fixedly sleeved on the second rotating shaft (21); A driving bevel gear (23), the driving bevel gear (23) is rotatably mounted on the cleaning frame (17) and connected to the power source (24) so ​​as to be circumferentially rotatable, and the axis of the driving bevel gear (23) is circumferentially perpendicular to the first rotating shaft (19); A driven bevel gear (25), the driven bevel gear (25) being rotatably sleeved on the first rotating shaft (19) and meshing with the driving bevel gear (23), and two fixing plates (26) extending from the ends of the driven bevel gear (25); There are two adjusting bevel gears (27), and the two adjusting bevel gears (27) are rotatably arranged on the two fixing plates (26). Both sides of the adjusting bevel gear (27) are respectively engaged with the first bevel gear (20) and the second bevel gear (22).

5. The finishing rolling equipment for thin-walled seamless steel pipe according to any one of claims 2 to 4, characterized in that: The cleaning frame (17) has protrusions (28) extending outwardly from both sides. A chute (29) for accommodating the protrusions (28) is provided on the frame (3). The protrusions (28) are slidably arranged in the chute (29). A positioning spring (30) is provided between the end of the protrusion (28) and the inner wall of the chute (29). The positioning spring (30) always has a movement tendency to push the cleaning frame (17) toward the roller (4).

6. A finishing rolling equipment for thin-walled seamless steel pipes according to any one of claims 1 to 4, characterized in that: The sliding drive assembly (6) comprises: A turntable (7), the turntable (7) being rotatably connected to the machine base (1); A drive shaft (8), wherein the drive shaft (8) is connected to the machine base (1), and a drive wheel (9) is circumferentially fixedly sleeved on the drive shaft (8), and the drive wheel (9) and the outer periphery of the turntable (7) are both provided with transmission teeth and mesh with each other; A swing rod (10), one end of the swing rod (10) is eccentrically hinged to the turntable (7), and the other end is hinged to the frame (3); A slip drive motor (11) is connected to a flywheel (13) via a belt (12), and the flywheel (13) is connected to a drive shaft (8).

7. A finishing rolling equipment for thin-walled seamless steel pipe according to any one of claims 1 to 4, characterized in that: The rotation drive assembly includes: There are two rotating wheels (14), and the two rotating wheels (14) are respectively fixed and coaxially sleeved on the outer ends of the roller (4); There are two racks (15), the two racks (15) are fixedly arranged on the machine base (1), and the two racks (15) are respectively engaged with the rotating wheel (14).

8. The finishing rolling equipment for thin-walled seamless steel pipe according to claim 4, characterized in that: A first baffle (31) is sleeved on the first rotating shaft (19) between the driven bevel gear (25) and the cleaning brush (18), and the first baffle (31) is fixedly connected to the cleaning frame (17).

9. The finishing rolling equipment for thin-walled seamless steel pipe according to claim 4, characterized in that: A second baffle (32) is sleeved on the second rotating shaft (21) between the second bevel gear (22) and the cleaning brush (18), and the second baffle (32) is fixedly connected to the cleaning frame (17).

10. A finishing process for thin-walled seamless steel pipes, characterized in that: The following steps are involved: S1: Heating, heating the tube billet to above 1150°C in a heating furnace; S2: Punching, the heated tube blank is punched by a punching machine to make a rough tube; S3: rolling, the rough tube is passed through the finishing equipment and reciprocated by the roller (4) to reduce the diameter, and the two cleaning brushes (18) on the side of the roller (4) rotate synchronously to clean the rolling grooves (16) of the two rollers (4) respectively, and the two cleaning brushes (18) can automatically fine-tune their rotation speed according to the resistance generated by the adhesion of debris; S4: Tube removal, the rolled rough tube is removed from the mandrel; S5: Finished product collection, straightening, cutting, inspection, packaging, marking and storage of finished pipes.

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