Inclined continuous pipe mill for penetrating seamless steel pipe
By using independently driven conical rolling rollers and bevel gear transmission mechanisms in seamless steel pipe penetration and fixed inclined pipe rolling mills, the problem of poor spiral and wall thickness uniformity in steel pipes in existing equipment is solved, and better uniformity is achieved Wall effect and wall thickness accuracy.
Patent Information
- Application Number
- CN202411827095.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-01-14
AI Technical Summary
The existing inclined rolling and continuous rolling pipe mills are severely spiraled in the steel pipe, and the wall thickness and dimension uniformity are poor, so they cannot be suitable for rolling conditions with high wall thickness accuracy, especially when passing through thick-walled pipes. .
A seamless steel pipe penetration inclined pipe rolling machine is designed, and it adopts three conical rolling rollers to independently drive, and achieves large torque output and independent speed regulation through bevel gear transmission mechanism to ensure independent control and rotary rolling of rolls.
It effectively eliminates the spiral phenomenon in the steel pipe, significantly improves the wall uniform effect, making the equipment more suitable for complex rolling conditions, and significantly improves the wall thickness accuracy.
Smart Images
Figure CN119303958A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of steel pipe production and processing, in particular to an oblique continuous pipe rolling machine for threading seamless steel pipes. Background Art
[0002] In the production of seamless steel pipes, the piercing machine, continuous rolling mill, and sizing (reducing) mill are the three major units for metal thermal deformation, which play an important role in the size and quality of steel pipes. At present, there are two types of pipe rolling units: continuous rolling and oblique rolling. One type of oblique continuous pipe rolling mill uses three rollers to rotate and roll the perforated rough pipe. The three rollers are controlled by three drive motors, and the output torque is small. The spiral phenomenon in the steel pipe is serious, and the surface and wall thickness uniformity are poor. The continuous pipe rolling mill does not achieve a good wall uniformity effect because the steel pipe only moves forward but does not rotate during the rolling process. Especially when the fixed-thickness wall pipe is directly rolled by the sizing mill without passing through the continuous rolling mill, the spiral phenomenon cannot be eliminated, and the wall thickness extreme difference is more obvious. Therefore, the existing oblique rolling and continuous pipe rolling mills are not suitable for rolling conditions with high wall thickness accuracy, especially when the fixed-thickness wall pipe is worn. Summary of the invention
[0003] The purpose of the present invention is to provide an oblique continuous tube rolling mill for threading seamless steel tubes. Two groups of oblique continuous tube rolling mills are arranged in a continuous rolling mill group to overcome the problems existing in the existing equipment.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a kind of oblique continuous pipe rolling mill for seamless steel pipe punching, which is used to rotationally roll the rough pipe after punching, including a frame, three driving power mechanisms installed on the frame, three rollers arranged on the inner side of the frame and three transmission mechanisms correspondingly connected between the three rollers and the three driving power mechanisms, the three driving power mechanisms correspond one to one with the three transmission mechanisms, each transmission mechanism includes a transmission shaft one, a bevel gear one, a bevel gear two and a transmission shaft two, the transmission shaft one is correspondingly connected and fixed with the roller, the transmission shaft one is fixedly mounted with a bevel gear one, the transmission shaft two is correspondingly connected with the driving power mechanism, the transmission shaft two is fixedly mounted with a bevel gear two, and the bevel gear two is meshed with the bevel gear one.
[0005] On the basis of the above technical solution, the present invention can also be improved as follows: As a further improvement of the above technical solution, one end of the transmission shaft 1 is correspondingly connected and fixed to the center of one end of the roller, and the transmission shaft 1 is coaxially arranged with the roller.
[0006] As a further improvement of the above technical solution, the rolling rollers are conical, the three rolling rollers are at an angle of 120 degrees to each other, the three rolling rollers are tilted and rotate around their respective center lines with the same rotation direction, and the center lines of the three rolling rollers intersect with the rolling center line to form a feed angle.
[0007] As a further improvement of the above technical solution, the frame is provided with a support corresponding to the rolling rollers one by one, the support is provided with a dial, the other end of the transmission shaft of the transmission mechanism is connected to a bearing seat, and a pointer is installed on the outer peripheral wall of the bearing seat.
[0008] As a further improvement of the above technical solution, the driving power mechanism consists of a driving motor and a reducer, the roller body length of the rolling mill is 400 mm, the cone angles of bevel gear one and bevel gear two are set to 10°, and shaft teeth are provided on transmission shaft two, which mesh with the gear teeth on the output shaft of the reducer.
[0009] As a further improvement of the above technical solution, the bevel gear 2 has the same structure as the bevel gear 1. The bevel gear 1 includes a gear body and bevel gear teeth. The bevel gear teeth are conical spiral along the tooth length direction. The helix angle of the bevel gear teeth is 35°. The normal module of the large end of the bevel gear teeth is 6.5. A center through hole is provided on the gear body. An inner cylindrical surface and an inner spline are provided in sequence from the large end to the small end in the center through hole. A countersunk hole coaxial with the center through hole is provided in the middle of the end face of the small end of the gear body.
[0010] The beneficial effects of the present invention are as follows: the three rollers of the oblique continuous pipe rolling mill for seamless steel pipe threading of the present invention are independently connected to a driving power mechanism through a transmission mechanism, the three rollers correspond to the three driving power mechanisms one by one, and the three driving power mechanisms independently drive the rollers, thereby realizing independent speed regulation of the rollers and constant torque output, each roller is independently controlled, and power is transmitted through a bevel gear pair composed of bevel gear two and bevel gear one, thereby realizing large torque output, making the equipment more suitable for complex rolling conditions, and achieving obvious wall evenness effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0012] Figure 1 It is a structural schematic diagram of a slant continuous pipe mill for seamless steel pipe threading provided by a preferred embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure of the transmission mechanism and rollers; Figure 3 yes Figure 2 Side view of the middle transmission mechanism and rollers; Figure 4 yes Figure 1 Schematic diagram of the coordination between the transmission mechanism and the dial; Figure 5 It is a structural schematic diagram of bevel gear 1 of the transmission mechanism; In the figure: 1. Roller; 2. Driving power mechanism; 3. Transmission mechanism; 31. Transmission shaft 1; 32. Bevel gear 1; 321. Gear body; 322. Bevel gear teeth; 323. Center through hole; 324. Inner cylindrical surface; 325. Inner spline; 326. Countersunk hole; 33. Bevel gear 2; 34. Transmission shaft 2; 341. Shaft teeth; 4. Soft tube; 5. Frame; 51. Support; 52. Dial; 53. Bearing seat; 531. Pointer. DETAILED DESCRIPTION
[0013] The present invention will now be further described in detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0015] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0016] like Figure 1 , Figure 2 and Figure 3 As shown, a preferred embodiment of the present invention provides an inclined continuous pipe mill for seamless steel pipe threading, which is used to rotationally roll the punched rough pipe 4 in the continuous pipe rolling unit, including a frame 5, three driving power mechanisms 2 installed on the frame 5, three rolling rollers 1 arranged on the inner side of the frame 5, and three transmission mechanisms 3 correspondingly connected between the three rolling rollers 1 and the three driving power mechanisms 2.
[0017] Each roller 1 is conical, and the three conical rollers 1 are symmetrically arranged at the vertices of an equilateral triangle with the rolling centerline as the center. The three conical rollers 1 are at an angle of 120 degrees to each other, and the center lines of the three rollers 1 are at a certain angle to the end face of the frame, so that the rollers 1 can drive the rough tube 4 to rotate forward during the rolling process. The three rollers 1 are tilted and rotate around their respective center lines in the same direction, and the center lines of the three rollers 1 intersect with the rolling centerline to form a feed angle.
[0018] The three driving power mechanisms 2 correspond to the three transmission mechanisms 3 one by one. Each transmission mechanism 3 includes a transmission shaft 1 31, a bevel gear 1 32, a bevel gear 2 33 and a transmission shaft 2 34. One end of the transmission shaft 1 31 is correspondingly connected and fixed to the center of one end of the roller 1. The transmission shaft 1 31 is coaxially arranged with the roller 1, and a bevel gear 1 32 is fixedly installed on the transmission shaft 1 31; one end of the transmission shaft 2 34 is correspondingly connected to the driving power mechanism 2 for transmission, and a bevel gear 2 33 is fixedly installed on the transmission shaft 2 34. The bevel gear 2 33 meshes with the bevel gear 1 32. The bevel gear 2 33 and the bevel gear 1 32 form a bevel gear pair, and the power output by the driving power mechanism 2 is transmitted to the roller 1 through the bevel gear pair, thereby driving the roller 1 to rotate. In addition, the bevel gear pair formed by the bevel gear 2 33 and the bevel gear 1 32 transmits power, realizing a large torque output, which meets the needs of the rolling working condition.
[0019] Preferably, if Figure 4 As shown, the frame 5 is provided with a support 51 corresponding to the roll 1 one by one, and a dial 52 is provided on the support 51. The other end of the transmission shaft 31 of the transmission mechanism 3 is connected to a bearing seat 53. A pointer 531 is installed on the outer peripheral wall of the bearing seat 53. The precision of the scale on the dial 52 is 20'. By setting the dial 52 on the support 51 and installing the pointer 531 on the bearing seat 53, the feed angle of the roll 1 can be accurately read, which is convenient for measuring the feed angle of the roll 1, realizing accurate adjustment of the feed angle of the roll 1, making rolling stable, and improving the quality of steel pipe products.
[0020] The bevel gear 2 33 has the same structure as the bevel gear 1 32, and the structure is described below using the bevel gear 1 32 as an example. Figure 5 As shown, bevel gear 1 32 includes a gear body 321 and bevel gear teeth 322. Bevel gear teeth 322 are conical spiral along the tooth length direction. The helix angle of bevel gear teeth 322 is 35°, and the normal module of the large end of bevel gear teeth 322 is 6.5. Bevel gear 2 33 and bevel gear 1 32 use spiral bevel gears with a large helix angle, which effectively reduces the large end diameter of the gear body 321, increases the contact length of the tooth surface, and reduces the overall size while carrying a large torque. After assembly, the structure is compact and occupies a small space, which is suitable for oblique continuous tube mills with a small appearance and a large rolling force.
[0021] The gear body 321 is provided with a central through hole 323, and the central through hole 323 is provided with an inner cylindrical surface 324 and an inner spline 325 in sequence from the large end to the small end, and the middle of the small end surface of the gear body 321 is provided with a countersunk hole 326 coaxial with the central through hole 323. When the bevel gear 1 32 is assembled with the transmission shaft 1 31, the inner cylindrical surface 324 of the central through hole 323 matches with the transmission shaft 1 31 without a gap, and a positioning sleeve or a positioning end cover is installed in the countersunk hole 326 to position on both sides of the inner spline 325 of the gear body 321, so that there is no gap between the gear body 321 and the transmission shaft 1 31, thereby ensuring the meshing accuracy between the bevel gear 2 33 and the bevel gear 1 32.
[0022] Specifically, the driving power mechanism 2 can adopt an existing driving motor and a reducer, or can be composed of a permanent magnet synchronous torque motor and a bevel gear box. In this embodiment, the driving power mechanism 2 is composed of a driving motor and a reducer, the roller body of the roller 1 is 400 mm long, the cone angles of the bevel gear 1 32 and the bevel gear 2 33 can be set to 10°, and the transmission shaft 2 34 is provided with shaft teeth 341, which mesh with the gear teeth on the output shaft of the reducer.
[0023] When the present invention is used, two groups of the above-mentioned oblique continuous tube rolling mills are arranged in the continuous rolling mill group. When each driving power mechanism 2 is working, it transmits power to the corresponding transmission shaft 2 34 of the transmission mechanism 3. A bevel gear 2 33 is arranged on the transmission shaft 2 34, and a bevel gear 1 32 is arranged on the transmission shaft 1 31. The bevel gear 2 33 is meshed with the bevel gear 1 32. The transmission shaft 2 34 finally transmits power to the transmission shaft 1 31 through the bevel gear pair composed of the bevel gear 2 33 and the bevel gear 1 32. The transmission shaft 1 drives the roller 1 to rotate. The above-mentioned transmission mechanism 3 adopts a bevel gear transmission method. Through this transmission method, the roller 1 drives the rough tube 4 to rotate and move forward. The three rollers 1 work together to realize the rotation rolling of the perforated rough tube 4, which effectively eliminates the spiral phenomenon in the steel tube and has obvious wall uniformity effect.
[0024] The three rollers 1 of the oblique continuous pipe rolling mill for seamless steel pipe threading of the present invention are independently connected to the driving power mechanism 2 through the transmission mechanism 3. The three rollers 1 correspond to the three driving power mechanisms 2 one by one. The three driving power mechanisms 2 independently drive the rollers 1, thereby realizing independent speed regulation and constant torque output of the rollers 1. Each roller 1 is independently controlled, and power is transmitted through the bevel gear pair composed of the bevel gear 2 33 and the bevel gear 1 32, thereby realizing large torque output, making the equipment more suitable for complex rolling conditions, and achieving obvious wall uniformity effect.
[0025] Any details not mentioned in the above specific embodiments of the present invention belong to the known technologies in the art and can be implemented with reference to the known technologies.
[0026] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.
Claims
1. A seamless steel pipe oblique continuous rolling mill for rotating the perforated rough pipe, characterized in that: It includes a frame, three driving power mechanisms installed on the frame, three rollers arranged on the inner side of the frame and three transmission mechanisms correspondingly connected between the three rollers and the three driving power mechanisms. The three driving power mechanisms correspond to the three transmission mechanisms one by one. Each transmission mechanism includes a transmission shaft 1, a bevel gear 1, a bevel gear 2 and a transmission shaft 2. The transmission shaft 1 is connected and fixed to the roller, the transmission shaft 1 is fixed with a bevel gear 1, the transmission shaft 2 is connected and transmitted to the driving power mechanism, the transmission shaft 2 is fixed with a bevel gear 2, and the bevel gear 2 is meshed with the bevel gear 1.
2. The oblique continuous pipe mill for seamless steel pipe threading according to claim 1, characterized in that: One end of the transmission shaft 1 is correspondingly connected and fixed to the center of one end of the roller, and the transmission shaft 1 is coaxially arranged with the roller.
3. The oblique continuous pipe mill for seamless steel pipe threading according to claim 2, characterized in that: The rollers are conical, and the three rollers are at an angle of 120 degrees to each other. The three rollers are tilted and rotate around their respective center lines in the same direction. The center lines of the three rollers intersect with the rolling center line to form a feed angle.
4. The oblique continuous pipe mill for seamless steel pipe threading according to claim 3, characterized in that: The frame is provided with supports corresponding to the rollers one by one, the supports are provided with scale plates, the other end of the transmission shaft of the transmission mechanism is connected with a bearing seat, and a pointer is installed on the outer peripheral wall of the bearing seat.
5. The oblique continuous pipe mill for seamless steel pipe threading according to claim 3, characterized in that: The driving power mechanism consists of a driving motor and a reducer. The roller body length of the roller is 400 mm. The cone angles of bevel gear 1 and bevel gear 2 are set to 10°. Transmission shaft 2 is provided with shaft teeth, which mesh with the gear teeth on the output shaft of the reducer.
6. The oblique continuous pipe mill for threading seamless steel pipes according to any one of claims 1 to 5, characterized in that: The bevel gear 2 has the same structure as the bevel gear 1. The bevel gear 1 includes a gear body and bevel gear teeth. The bevel gear teeth are conical spiral along the tooth length direction. The helix angle of the bevel gear teeth is 35°. The normal module of the large end of the bevel gear teeth is 6.
5. A center through hole is provided on the gear body. An inner cylindrical surface and an inner spline are provided in sequence from the large end to the small end in the center through hole. A countersunk hole coaxial with the center through hole is provided in the middle of the small end face of the gear body.