A pre-straightening machine for producing cold-drawn precision seamless steel pipes

Abstract

The utility model relates to steel pipe processing equipment technical field, the utility model provides a kind of pre-straightening machine for cold-drawing precision seamless steel tube production, it includes: installation box, the top of the installation box is fixedly connected with mounting plate, the inside movable joint of the mounting plate is raised plate, the front of the raised plate is fixedly connected with rotating shaft, in the utility model, by setting lift motor, screw, movable block, rotating rod and connecting plate, lift motor operation, will make screw rotation drive movable block horizontal motion, and then make rotating rod rotation drive connecting plate upward movement, so that two round rods drive raised plate whole upward movement, realize the purpose of automatically adjusting the height of first guide roller, at the same time reaches the purpose of improving straightening processing efficiency, by the above technical scheme, solve the technical problem that the guide roller needs manual multiple adjustment in prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe processing equipment, specifically to a pre-straightening machine for the production of cold-drawn precision seamless steel pipes. Background Technology

[0002] Cold-drawn precision seamless steel pipe is a special seamless steel pipe product made from seamless steel pipe billets as raw materials and precision processed by room temperature cold drawing process to obtain high-precision dimensions, excellent surface quality and controllable mechanical properties. Its core characteristics are "seamless" (no welding seams), "cold drawing" (room temperature plastic deformation processing) and "precision" (dimensional and surface accuracy far exceeds that of ordinary steel pipes). It is mainly used in industrial scenarios with strict requirements for pipe precision, strength and surface finish.

[0003] In existing technologies, pre-straightening machines are frequently used when straightening seamless steel pipes. While these machines can straighten steel pipes, they lack the ability to automatically adjust the height of the guide rollers. When straightening steel pipes of different diameters, operators need to adjust multiple guide rollers one by one, which is cumbersome and time-consuming, affecting processing efficiency during continuous straightening. Therefore, improvements are needed. Utility Model Content

[0004] To overcome the above-mentioned defects, the present invention provides a pre-straightening machine for the production of cold-drawn precision seamless steel pipes, which solves the technical problem of requiring manual adjustment of the guide rollers multiple times in the prior art.

[0005] According to one aspect, at least one embodiment of the present invention provides a pre-straightening machine for the production of cold-drawn precision seamless steel pipes, comprising: The mounting box has a mounting plate fixedly connected to its top. A lifting plate is movably connected inside the mounting plate. A rotating shaft is fixedly connected to the front of the lifting plate. The other end of the rotating shaft passes through the mounting plate and extends to the outside of the mounting plate, where it is movably sleeved with a first guide roller. A lifting motor located behind the mounting plate is fixedly connected to the top of the mounting box. A lead screw is fixedly sleeved at the other end of the output shaft of the lifting motor. A fixing block is movably sleeved on the outer surface of the left side of the lead screw. The bottom of the fixing block is fixedly connected to the top of the mounting box. A movable block is threaded onto the outer surface of the lead screw. A rotating rod is hinged to the top of the movable block. A connecting plate is hinged to the other end of the rotating rod. The bottom of the connecting plate is movably connected to the top of the mounting plate. A round rod is fixedly connected to the bottom of the connecting plate. The bottom of the round rod passes through the mounting plate and extends into the interior of the mounting plate. The bottom of the round rod is fixedly connected to the top of the lifting plate.

[0006] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of the present invention, a groove is provided on the top of the mounting box, and a limiting block is movably connected to the inner surface of the groove, with the top of the limiting block being fixedly connected to the bottom of the movable block.

[0007] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of the present invention, a movable shaft is movably sleeved inside the mounting plate, and a first driven wheel and a second guide roller are fixedly sleeved on the outer surface of the movable shaft. The outer surface of the first driven wheel is movably connected to the back of the mounting plate, and the outer surface of the second guide roller is movably connected to the front of the mounting plate.

[0008] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of this utility model, a rectangular box is fixedly connected to the back of the mounting plate, a first motor is fixedly connected to the outer surface of the rectangular box, a first transmission shaft is fixedly sleeved at the other end of the output shaft of the first motor, the other end of the first transmission shaft passes through the rectangular box and the mounting plate in sequence and extends to the outside of the mounting plate, and a first driving wheel is fixedly sleeved on its outer surface, the outer surface of the first driving wheel is movably connected to the back of the mounting plate, the outer surface of the first transmission shaft is fixedly sleeved to the inner surface of the second guide roller, and the first driving wheel is connected to the first driven wheel through a first conveyor belt.

[0009] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of the present invention, a mounting seat located on the left side of the mounting plate is fixedly connected to the top of the mounting box, and a movable plate is movably connected inside the mounting seat.

[0010] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of the present invention, a rotating shaft and a mounting shaft are movably sleeved inside the movable plate. The top and bottom of the rotating shaft and the mounting shaft pass through the mounting base and the mounting box respectively and extend to the top of the mounting base and the inside of the mounting box. Straightening rollers are fixedly sleeved on the outer surfaces of the top ends of the rotating shaft and the mounting shaft. The bottom of the straightening roller is movably connected to the top of the mounting base.

[0011] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of the present invention, a second driving wheel is fixedly sleeved on the outer surface of the bottom end of the rotating shaft, and a second driven wheel is fixedly sleeved on the outer surface of the bottom end of the mounting shaft. The second driving wheel is connected to the second driven wheel through a second conveyor belt.

[0012] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of this utility model, a second motor is provided inside the mounting box, and the other end of the output shaft of the second motor is fixedly sleeved with the bottom of the rotating shaft.

[0013] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of the present invention, the movable plate is internally threaded with a first threaded rod, the other end of the first threaded rod passes through the mounting base and extends to the outside of the mounting base and is fixedly sleeved with a third driven wheel, the outer surface of the third driven wheel being movably connected to the outside of the mounting base.

[0014] For example, in a pre-straightening machine for producing cold-drawn precision seamless steel pipes provided in at least one embodiment of this utility model, a protective shell is fixedly connected to the outer side of the mounting base, a third motor is fixedly connected to the outer side of the protective shell, a second threaded rod is fixedly sleeved at the other end of the output shaft of the third motor, the other end of the second threaded rod passes through the protective shell and the mounting base in sequence and extends into the interior of the mounting base, and a third driving wheel is fixedly sleeved on its outer surface, the outer surface of the second threaded rod is threadedly connected to the inner surface of the movable plate, and the third driving wheel is drivenly connected to the third driven wheel through a third conveyor belt.

[0015] The beneficial effects of this utility model are as follows: 1. In this utility model, by setting up a lifting motor, a lead screw, a movable block, a rotating rod, and a connecting plate, when the lifting motor is running, the lead screw will rotate, causing the movable block to move horizontally, which in turn causes the rotating rod to rotate, causing the connecting plate to move upward. This causes the two round rods to drive the lifting plate to move upward as a whole, thereby achieving the purpose of automatically adjusting the height of the first guide roller, and indirectly achieving the purpose of improving the straightening processing efficiency.

[0016] 2. In this utility model, by setting a first threaded rod, a third driven wheel, a third motor, a second threaded rod, and a third conveyor belt, when the third motor is running, the second threaded rod will drive the third driving wheel to rotate. The rotation of the third driving wheel will drive the third driven wheel to rotate through the third conveyor belt, thereby causing the first threaded rod to rotate. Under the interaction of the second threaded rod and the first threaded rod, the movable plate will automatically adjust its position within the mounting base, thereby driving the straightening roller to move and adjust its position, further improving the efficiency of the straightening process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional view of the mounting base in the embodiment; Figure 3 for Figure 1 A schematic diagram of the rear view structure in the embodiment; Figure 4 for Figure 1 A cross-sectional structural schematic diagram of the mounting plate in the embodiment; Figure 5 for Figure 1 A cross-sectional view of the mounting box in the embodiment; Figure 6 for Figure 2 A schematic diagram of the structure of the third conveyor belt in the embodiment; Figure 7 for Figure 3 A schematic diagram of the limiting block in the embodiment; Figure 8 for Figure 5 A schematic diagram of the structure of the second driven wheel in the embodiment.

[0019] In the diagram: 1. Mounting box; 2. Mounting plate; 3. Lifting plate; 4. Rotating shaft; 5. First guide roller; 6. Lifting motor; 7. Lead screw; 8. Fixed block; 9. Movable block; 10. Rotating rod; 11. Connecting plate; 12. Round rod; 13. Slide groove; 14. Limiting block; 15. Movable shaft; 16. First driven round wheel; 17. Rectangular box; 18. First motor; 19. First transmission shaft; 20. First driving round wheel; 21. ... 1. Conveyor belt; 22. Second guide roller; 23. Mounting base; 24. Movable plate; 25. Rotating shaft; 26. Straightening roller; 27. Second driving wheel; 28. Second driven wheel; 29. ​​Second motor; 30. Second conveyor belt; 31. First threaded rod; 32. Third driven wheel; 33. Protective shell; 34. Third motor; 35. Second threaded rod; 36. Third driving wheel; 37. Third conveyor belt; 38. Mounting shaft. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0020] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-8 As shown, it illustrates a pre-straightening machine for producing cold-drawn precision seamless steel pipes according to an embodiment of this disclosure, comprising: Mounting box 1, mounting plate 2 is fixedly connected to the top of mounting box 1, lifting plate 3 is movably connected inside mounting plate 2, rotating shaft 4 is fixedly connected to the front of lifting plate 3, the other end of rotating shaft 4 passes through mounting plate 2 and extends to the outside of mounting plate 2 and is movably sleeved with first guide roller 5, lifting motor 6 located behind mounting plate 2 is fixedly connected to the top of mounting box 1, lead screw 7 is fixedly sleeved at the other end of output shaft of lifting motor 6, fixing block 8 is movably sleeved on the outer surface of left side of lead screw 7, bottom of fixing block 8 is fixedly connected to the top of mounting box 1, movable block 9 is threaded on the outer surface of lead screw 7, rotating rod 10 is hinged to the top of movable block 9, connecting plate 11 is hinged to the other end of rotating rod 10, bottom of connecting plate 11 is movably connected to the top of mounting plate 2, round rod 12 is fixedly connected to the bottom of connecting plate 11, bottom of round rod 12 passes through mounting plate 2 and extends into the interior of mounting plate 2, bottom of round rod 12 is fixedly connected to the top of lifting plate 3.

[0026] The lead screw 7 and the movable block 9 adopt a threaded connection design, which can form a self-locking structure by utilizing the friction between the threads, thus ensuring the stability of the lifting plate 3 after the connecting plate 11 and the round rod 12 drive the lifting plate 3 to adjust upward as a whole.

[0027] In some examples, the top of the mounting box 1 is provided with a slide groove 13, and the inner surface of the slide groove 13 is movably connected to a limiting block 14, the top of the limiting block 14 being fixedly connected to the bottom of the movable block 9.

[0028] The design of the slide 13 and the limiting block 14 serves to limit the movement of the movable block 9, ensuring the stability of the horizontal movement of the movable block 9.

[0029] In some examples, a movable shaft 15 is movably sleeved inside the mounting plate 2, and a first driven wheel 16 and a second guide roller 22 are fixedly sleeved on the outer surface of the movable shaft 15. The outer surface of the first driven wheel 16 is movably connected to the back of the mounting plate 2, and the outer surface of the second guide roller 22 is movably connected to the front of the mounting plate 2.

[0030] The design of the movable shaft 15 serves to support the first driven wheel 16 and the second guide roller 22, enabling them to rotate stably.

[0031] In some examples, a rectangular box 17 is fixedly connected to the back of the mounting plate 2, a first motor 18 is fixedly connected to the outer surface of the rectangular box 17, a first drive shaft 19 is fixedly sleeved at the other end of the output shaft of the first motor 18, the other end of the first drive shaft 19 passes through the rectangular box 17 and the mounting plate 2 in sequence and extends to the outside of the mounting plate 2, and a first driving wheel 20 is fixedly sleeved on its outer surface. The outer surface of the first driving wheel 20 is movably connected to the back of the mounting plate 2, the outer surface of the first drive shaft 19 is fixedly sleeved to the inner surface of the second guide roller 22, and the first driving wheel 20 is connected to the first driven wheel 16 through the first conveyor belt 21.

[0032] When the first motor 18 is running, the first drive shaft 19 will drive the first driving wheel 20 to rotate. The rotation of the first driving wheel 20 will drive the first driven wheel 16 to rotate through the first conveyor belt 21, which in turn will drive the movable shaft 15 to rotate the second guide roller 22, thus realizing the function of driving the steel pipe to feed and guide.

[0033] In some examples, the top of the mounting box 1 is fixedly connected to a mounting base 23 located on the left side of the mounting plate 2, and a movable plate 24 is movably connected inside the mounting base 23.

[0034] This design allows the movable plate 24 to move inside the mounting base 23.

[0035] In some examples, the movable plate 24 is internally fitted with a rotating shaft 25 and a mounting shaft 38. The top and bottom of the rotating shaft 25 and the mounting shaft 38 pass through the mounting base 23 and the mounting box 1, respectively, and extend to the top of the mounting base 23 and the interior of the mounting box 1. The outer surfaces of the top ends of the rotating shaft 25 and the mounting shaft 38 are fixedly fitted with straightening rollers 26. The bottom of the straightening rollers 26 is movably connected to the top of the mounting base 23.

[0036] As the movable plate 24 moves inside the mounting base 23, it will drive the rotating shaft 25, the straightening roller 26 and the mounting shaft 38 to move together.

[0037] In some examples, a second driving wheel 27 is fixedly sleeved on the outer surface of the bottom end of the rotating shaft 25, and a second driven wheel 28 is fixedly sleeved on the outer surface of the bottom end of the mounting shaft 38. The second driving wheel 27 is connected to the second driven wheel 28 through the second conveyor belt 30.

[0038] With this design, when the second driving wheel 27 rotates, it can drive the second driven wheel 28 to rotate together via the second conveyor belt 30.

[0039] In some examples, a second motor 29 is provided inside the mounting box 1, and the other end of the output shaft of the second motor 29 is fixedly sleeved to the bottom of the rotating shaft 25.

[0040] With this design, the rotating shaft 25 can provide stable support for the second motor 29.

[0041] In some examples, the movable plate 24 is internally threaded with a first threaded rod 31, the other end of which passes through the mounting base 23 and extends to the outside of the mounting base 23 and is fixedly sleeved with a third driven wheel 32, the outer surface of which is movably connected to the outside of the mounting base 23.

[0042] The design of the first threaded rod 31 serves to support and limit the third driven wheel 32.

[0043] In some examples, a protective shell 33 is fixedly connected to the outside of the mounting base 23, and a third motor 34 is fixedly connected to the outside of the protective shell 33. A second threaded rod 35 is fixedly sleeved at the other end of the output shaft of the third motor 34. The other end of the second threaded rod 35 passes through the protective shell 33 and the mounting base 23 in sequence and extends into the interior of the mounting base 23. A third driving wheel 36 is fixedly sleeved on its outer surface. The outer surface of the second threaded rod 35 is threadedly connected to the inner surface of the movable plate 24. The third driving wheel 36 is connected to the third driven wheel 32 through the third conveyor belt 37.

[0044] When the third motor 34 is running, the second threaded rod 35 will drive the third driving wheel 36 to rotate. The rotation of the third driving wheel 36 will drive the third driven wheel 32 to rotate through the third conveyor belt 37, which in turn will cause the first threaded rod 31 to rotate. Under the interaction of the second threaded rod 35 and the first threaded rod 31, the movable plate 24 will automatically adjust its position within the mounting base 23.

[0045] Working principle and usage process of this utility model: When straightening the steel pipe, the steel pipe is first placed between the first guide roller 5 and the second guide roller 22. At this time, the first motor 18 is started, which will cause the first drive shaft 19 to drive the first driving wheel 20 to rotate. The rotation of the first driving wheel 20 drives the first driven wheel 16 to rotate through the first conveyor belt 21, which in turn causes the movable shaft 15 to drive the second guide roller 22 to rotate, thus realizing the function of feeding and guiding the steel pipe. When the steel pipe is conveyed to the straightening roller 26, the second motor 29 is started, which will cause the rotating shaft 25 to drive the second driving wheel 27 to rotate. The rotation of the second driving wheel 27 drives the second driven wheel 28 to rotate through the second conveyor belt 30, which in turn causes the straightening roller 26 to rotate, moving the steel pipe and straightening it at the same time.

[0046] When straightening steel pipes of different diameters, the lifting motor 6 is started first, which causes the lead screw 7 to rotate, driving the movable block 9 to move horizontally. This causes the rotating rod 10 to rotate, driving the connecting plate 11 to move upward. As a result, the two round rods 12 drive the lifting plate 3 to move upward as a whole, achieving the purpose of automatically adjusting the height of the first guide roller 5. Then, the third motor 34 is started, which causes the second threaded rod 35 to drive the third driving wheel 36 to rotate. The rotation of the third driving wheel 36 drives the third driven wheel 32 to rotate through the third conveyor belt 37, which in turn causes the first threaded rod 31 to rotate. Under the interaction of the second threaded rod 35 and the first threaded rod 31, the movable plate 24 is driven to automatically adjust its position within the mounting base 23, which in turn drives the straightening roller 26 to move and adjust its position, further improving the efficiency of the straightening process.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pre-straightening machine for producing cold-drawn precision seamless steel pipes, characterized in that, include: Mounting box (1), the top of which is fixedly connected to mounting plate (2), the inside of which is movably connected to lifting plate (3), the front of which is fixedly connected to rotating shaft (4), the other end of which passes through mounting plate (2) and extends to the outside of mounting plate (2) and is movably sleeved with first guide roller (5), the top of which is fixedly connected to lifting motor (6) located behind mounting plate (2), the other end of which is fixedly sleeved with lead screw (7), the outer surface of the left side of lead screw (7) is movably sleeved with fixing block. (8) The bottom of the fixed block (8) is fixedly connected to the top of the mounting box (1). The outer surface of the lead screw (7) is threaded with a movable block (9). The top of the movable block (9) is hinged with a rotating rod (10). The other end of the rotating rod (10) is hinged with a connecting plate (11). The bottom of the connecting plate (11) is movably connected to the top of the mounting plate (2). The bottom of the connecting plate (11) is fixedly connected with a round rod (12). The bottom of the round rod (12) penetrates the mounting plate (2) and extends into the interior of the mounting plate (2). The bottom of the round rod (12) is fixedly connected to the top of the lifting plate (3).

2. The pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 1, characterized in that, The top of the mounting box (1) is provided with a sliding groove (13), and the inner surface of the sliding groove (13) is movably connected to a limiting block (14). The top of the limiting block (14) is fixedly connected to the bottom of the movable block (9).

3. The pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 1, characterized in that, The mounting plate (2) is movably sleeved with a movable shaft (15). The outer surface of the movable shaft (15) is fixedly sleeved with a first driven wheel (16) and a second guide roller (22). The outer surface of the first driven wheel (16) is movably connected to the back of the mounting plate (2), and the outer surface of the second guide roller (22) is movably connected to the front of the mounting plate (2).

4. A pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 1, characterized in that, A rectangular box (17) is fixedly connected to the back of the mounting plate (2). A first motor (18) is fixedly connected to the outer surface of the rectangular box (17). A first transmission shaft (19) is fixedly sleeved at the other end of the output shaft of the first motor (18). The other end of the first transmission shaft (19) passes through the rectangular box (17) and the mounting plate (2) in sequence and extends to the outside of the mounting plate (2). A first driving wheel (20) is fixedly sleeved on the outer surface. The outer surface of the first driving wheel (20) is movably connected to the back of the mounting plate (2). The outer surface of the first transmission shaft (19) is fixedly sleeved to the inner surface of the second guide roller (22). The first driving wheel (20) is connected to the first driven wheel (16) through the first conveyor belt (21).

5. A pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 1, characterized in that, The top of the mounting box (1) is fixedly connected to a mounting base (23) located on the left side of the mounting plate (2), and a movable plate (24) is movably connected inside the mounting base (23).

6. A pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 5, characterized in that, The movable plate (24) is internally fitted with a rotating shaft (25) and a mounting shaft (38). The top and bottom of the rotating shaft (25) and the mounting shaft (38) pass through the mounting base (23) and the mounting box (1) respectively and extend to the top of the mounting base (23) and the inside of the mounting box (1). A straightening roller (26) is fixedly fitted on the outer surface of the top of the rotating shaft (25) and the mounting shaft (38). The bottom of the straightening roller (26) is movably connected to the top of the mounting base (23).

7. A pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 6, characterized in that, The outer surface of the bottom end of the rotating shaft (25) is fixedly sleeved with a second driving wheel (27), and the outer surface of the bottom end of the mounting shaft (38) is fixedly sleeved with a second driven wheel (28). The second driving wheel (27) is connected to the second driven wheel (28) through the second conveyor belt (30).

8. A pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 1, characterized in that, The mounting box (1) is equipped with a second motor (29), and the other end of the output shaft of the second motor (29) is fixedly sleeved to the bottom of the rotating shaft (25).

9. A pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 5, characterized in that, The movable plate (24) is internally threaded with a first threaded rod (31). The other end of the first threaded rod (31) passes through the mounting base (23) and extends to the outside of the mounting base (23) and is fixedly sleeved with a third driven wheel (32). The outer surface of the third driven wheel (32) is movably connected to the outside of the mounting base (23).

10. A pre-straightening machine for producing cold-drawn precision seamless steel pipes according to claim 5, characterized in that, A protective shell (33) is fixedly connected to the outside of the mounting base (23). A third motor (34) is fixedly connected to the outside of the protective shell (33). A second threaded rod (35) is fixedly sleeved on the other end of the output shaft of the third motor (34). The other end of the second threaded rod (35) passes through the protective shell (33) and the mounting base (23) in sequence and extends into the interior of the mounting base (23). A third driving wheel (36) is fixedly sleeved on its outer surface. The outer surface of the second threaded rod (35) is threadedly connected to the inner surface of the movable plate (24). The third driving wheel (36) is connected to the third driven wheel (32) through the third conveyor belt (37).

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