Automatic aligning vertical rotating mechanism for large metal cylinder segment

Abstract

The application discloses a large metal cylinder segment automatic centering vertical rotating mechanism, which comprises an adjusting driving device and a supporting rolling device arranged on a workbench. The supporting rolling device comprises a first supporting rolling mechanism and a second supporting rolling mechanism. The first supporting rolling mechanism is in rolling contact with the inner wall of a cylinder segment workpiece. The first supporting rolling mechanism comprises two vertically and parallel arranged supporting rolling members. The second supporting rolling mechanism is arranged on the bottom of the cylinder segment workpiece and comprises a plurality of rotating supporting seats. The adjusting driving device comprises a pre-tightening mechanism moving along a linear direction and a rotating mechanism connected with the pre-tightening mechanism. The rotating mechanism is abutted to the inner wall of the cylinder segment workpiece under the driving of the pre-tightening mechanism. The large metal cylinder segment automatic centering vertical rotating mechanism comprises the adjusting driving device and the supporting rolling device, can automatically adjust the center of a circle and has the characteristics of low power consumption, high efficiency, high stability and the like.

Description

Technical Field

[0001] This invention belongs to the field of cylinder segment processing technology, and in particular to an automatic self-aligning vertical rotating mechanism for large metal cylinder segments. Background Technology

[0002] Large metal cylindrical sections are widely used in various industries such as aerospace, shipbuilding, and wind power, and their processing and production cannot be separated from the participation of rotary mechanisms. Rotary mechanisms provide rotational motion for processes such as rolling and welding, curvature straightening, and special surface treatments of large metal cylindrical sections.

[0003] However, traditional metal cylinder rotation mechanisms still have the following problems when it comes to the efficient and stable vertical rotation of large cylinder sections:

[0004] (1) Traditional metal cylinder rotating mechanisms are mostly horizontal structures, with fewer vertical rotating structures. Horizontal rotating structures have higher rotational stability, but the loading and unloading process is more complicated, and the workpiece surface is easily damaged during rotation.

[0005] (2) The traditional vertical rotating mechanism is usually driven by the base rotating, while the base clamping device clamps the cylindrical workpiece and drives it to rotate synchronously. This driving method has high energy consumption, the loading and clamping process is time-consuming and labor-intensive, and it also causes some damage to the surface of the workpiece.

[0006] (3) Traditional rotary mechanisms have poor rotational position stability, and the center position of the workpiece cannot be guaranteed. It is not convenient to quickly adjust the center position of the workpiece, which leads to inefficient coordination with subsequent operating devices and affects the overall processing efficiency.

[0007] The aforementioned factors all make it difficult to achieve efficient and stable automated rotation of metal cylindrical workpieces, and also hinder the rapid adjustment of the center. Therefore, to meet application requirements, it is necessary to develop a highly efficient and stable vertical rotating mechanism for automatic centering of large metal cylindrical workpieces. Summary of the Invention

[0008] Purpose of the invention: To provide an automatic self-aligning vertical rotating mechanism for large metal cylinder sections, in order to solve the problems in the prior art of achieving efficient and stable automated rotation of metal cylinder workpieces, and the inconvenience of quickly adjusting the center.

[0009] Technical solution:

[0010] A large metal cylinder section automatic self-aligning vertical rotating mechanism includes an adjustment drive device and a support rolling device mounted on a worktable. The support rolling device includes a first support rolling mechanism and a second support rolling mechanism. The first support rolling mechanism rolls in contact with the inner wall of the cylinder section workpiece. The first support rolling mechanism includes two vertically and parallelly arranged support rolling elements. The second support rolling mechanism is used to support the bottom of the cylinder section workpiece. The second support rolling mechanism includes several rotating support seats.

[0011] The adjustment drive device includes a pre-tightening mechanism that moves in a straight line and a rotating mechanism connected to the pre-tightening mechanism. During operation, the rotating mechanism abuts against the inner wall of the cylindrical workpiece under the drive of the pre-tightening mechanism and drives the cylindrical workpiece to rotate.

[0012] With the direction of movement of the pre-tightening mechanism as the axis of symmetry, the two supporting rolling elements and several rotating support seats are symmetrically distributed on both sides of the axis of symmetry on the worktable;

[0013] When the cylindrical workpiece is placed on the vertical rotating mechanism for self-alignment, the bottom of the cylindrical workpiece is first placed on the rotating support seat. The pre-tightening mechanism drives the rotating mechanism to move away from the first supporting rolling mechanism until the two supporting rolling elements abut against the inner wall of the cylindrical workpiece in line contact, and the rotating mechanism abuts against the inner wall of the cylindrical workpiece in surface contact. The above three contact positions are projected onto the worktable in the vertical direction to form a triangular structure. Under the rotational driving action of the rotating mechanism, the cylindrical workpiece rotates around the geometric center axis of the cylindrical workpiece.

[0014] In a further embodiment, the supporting rolling element includes a supporting column and a plurality of tapered roller bearings. The plurality of tapered roller bearings are rotatably mounted on the supporting column along the height direction of the supporting column, and a bearing washer is provided between two adjacent tapered roller bearings.

[0015] In a further embodiment, the supporting column is a cylindrical structure, and two supporting columns are symmetrically arranged on both sides of the axis of symmetry. The distance between the two parallel supporting columns is 450-500mm, and the height of the supporting column is 1500-2500mm.

[0016] In a further embodiment, several of the rotating support seats are distributed on the worktable according to the diameter of the cylindrical workpiece and are located outside the first support rolling mechanism.

[0017] Several rotating support seats are respectively disposed in a first support area and a second support area on the worktable. The several rotating support seats disposed in the first support area are close to the two support columns, and the several rotating support seats disposed in the second support area are located in the extension direction of the pre-tightening mechanism.

[0018] In a further embodiment, the number of the plurality of rotating support seats is odd, with an odd number of the rotating support seats provided in the first support area and an even number of the rotating support seats provided in the second support area;

[0019] Wherein, one of the rotating support seats in the first support area is distributed on the axis of the axis of symmetry and is arranged parallel to the axis of the axis of symmetry;

[0020] The even number of rotating support seats in the first support area and the second support area are symmetrically distributed on both sides of the axis of symmetry.

[0021] In a further embodiment, the rotating support includes a roller housing, which is sleeved on the roller shaft via a deep groove ball bearing. The roller shaft is mounted on a roller bracket via an end cap, and the roller bracket is detachably mounted on the worktable via a mounting flange.

[0022] In a further embodiment, the projection of the axis of the roller shaft contained in an even number of the rotating supports in the first support area and the second support area onto the worktable forms an angle with the axis of the axis of symmetry.

[0023] In a further embodiment, the pre-tightening mechanism includes a pre-tightening electric cylinder, the fixed end of which is mounted on the workbench via a connector, and the telescopic end of which is connected to the rotating mechanism.

[0024] In a further embodiment, the rotating mechanism includes a hub motor, which is connected to the telescopic end of the pre-tensioned electric cylinder via a motor adapter plate and a fixed pin.

[0025] In a further embodiment, a sliding mechanism is provided between the rotating mechanism and the worktable. The sliding mechanism includes a slider and a guide rail for the slider to slide linearly. The slider is mounted on the motor adapter plate, and the guide rail is mounted on the worktable via the guide rail adapter plate.

[0026] The beneficial effects of this invention are as follows: It includes an adjusting drive device and a supporting rolling device, enabling automatic adjustment of the center of rotation. It also features low power consumption, high efficiency, and high stability. This mechanism can achieve automated rotational movement of cylindrical sections with a height of 1000-1500mm, a wall thickness of 20-40mm, and a diameter of 1000-1700mm. Specific effects are as follows:

[0027] (1) The rotary drive method uses a hub motor and a pre-tightening electric cylinder to drive the large metal cylindrical workpiece through static friction. The drive method is novel, causes less damage to the workpiece surface, and has low overall power consumption, which is in line with the current trend of energy conservation and emission reduction.

[0028] (2) By using a combination of several tapered roller bearings and several rotating support seats on the support column, the frictional resistance during rotation is reduced, and the load force can be borne.

[0029] (3) The vertical rotating mechanism is convenient for loading and unloading, and does not require strict control of the workpiece placement position. The pre-tightening electric cylinder automatically adjusts the center position and can maintain the stability of the workpiece position during the movement. The center adjustment is quick and convenient, so it can quickly and efficiently cooperate with the subsequent processing operations of the cylindrical workpiece. Attached Figure Description

[0030] Figure 1 This is a perspective view of a large metal cylinder section automatic self-aligning vertical rotating mechanism according to the present invention.

[0031] Figure 2 This is a schematic diagram of the components of the adjusting rotation device of the present invention.

[0032] Figure 3 This is a schematic diagram of the supporting rolling device of the present invention.

[0033] Figure 4 This is a two-dimensional cross-sectional schematic diagram of the rotating support base of the present invention.

[0034] Figure 5 This is a flowchart of the rotational motion control of the present invention.

[0035] Figure 6 This is a top view schematic diagram of the placement of the large metal cylindrical section workpiece according to the present invention.

[0036] Figure 7 This is a front view schematic diagram of the placement of the large metal cylindrical workpiece according to the present invention.

[0037] The attached figures are labeled as follows: Adjustment drive device 1, preload electric cylinder 1-1, electric cylinder driver 1-2, hub motor 1-3, motor driver 1-4, motor adapter plate 1-5, guide rail adapter plate 1-6, electric cylinder front adapter plate 1-7, electric cylinder rear adapter plate 1-8, rotary drive adapter plate 1-9, fixed pin shaft 1-10, slider 1-11, guide rail 1-12, support rolling device 2, support column 2-1, tapered roller bearing 2-2, bearing gasket 2-3, rotary support seat 2-4, roller bracket 2-4-1, roller shaft 2-4-2, roller housing 2-4-3, end cover 2-4-4, deep groove ball bearing 2-4-5, control system 3. Detailed Implementation

[0038] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0039] The present invention will be further described in detail below with reference to the accompanying drawings.

[0040] Reference Figure 1-7 This invention discloses an automatic self-aligning vertical rotating mechanism for large metal cylinder sections, comprising an adjustment drive device 1 and a support rolling device 2 mounted on a worktable. The support rolling device 2 includes a first support rolling mechanism and a second support rolling mechanism. The first support rolling mechanism rolls in contact with the inner wall of the cylinder section workpiece and includes two vertically and parallelly arranged support rolling elements, which are arranged parallel to each other on both sides of the adjustment drive device 1 on the worktable. The second support rolling mechanism supports the bottom of the cylinder section workpiece and includes several rotating support seats 2-4. The adjustment drive device 1 includes a pre-tightening mechanism that moves in a straight line and a rotating mechanism connected to the pre-tightening mechanism. During operation, the rotating mechanism, driven by the pre-tightening mechanism, abuts against the inner wall of the cylinder section workpiece and drives the cylinder section workpiece to rotate. With the direction of movement of the pre-tightening mechanism as the axis of symmetry, the two support rolling elements and the several rotating support seats 2-4 are symmetrically positioned on the worktable. Distributed on both sides of the axis of symmetry; when the cylindrical workpiece is placed on the vertical rotating mechanism for self-alignment, the bottom of the cylindrical workpiece is first placed on the rotating support seat 2-4. The pre-tightening mechanism drives the rotating mechanism to move away from the first support rolling mechanism until the two support rolling elements abut against the inner wall of the cylindrical workpiece in a line contact manner, and the rotating mechanism abuts against the inner wall of the cylindrical workpiece in a surface contact manner. The above three contact positions are projected onto the worktable in the vertical direction to form a triangular structure. Under the rotational driving action of the rotating mechanism, the cylindrical workpiece rotates around the geometric center axis of the cylindrical workpiece. The thrust of the pre-tightening mechanism and the driving force of the rotating mechanism itself act together on the cylindrical workpiece. The static friction force formed between the two acts as the rotational driving force, driving the cylindrical workpiece to rotate. This mechanism can realize the automated rotational movement of cylindrical sections with a height of 1000-1500mm, a wall thickness of 20-40mm, and a diameter of 1000-1700mm.

[0041] The supporting rolling element includes a supporting column 2-1 and several tapered roller bearings 2-2. The tapered roller bearings 2-2 are rotatably mounted on the supporting column 2-1 along its height. Bearing washers 2-3 are provided between adjacent tapered roller bearings 2-2. The bottom of the supporting column 2-1 is fixed to the worktable. Through the preload thrust of the two supporting columns 2-1 and the preload mechanism, the rotating mechanism and the two supporting columns 2-1 are arranged in a triangular shape on the worktable, with three contact points defining the cylindrical workpiece. To reduce the friction between the inner wall of the cylindrical workpiece and the support column 2-1, multiple tapered roller bearings 2-2 are evenly distributed on each of the two support columns 2-1 at the center position. This transforms the large sliding friction between the cylindrical workpiece and the support column 2-1 during rotation into smaller rolling friction. At the same time, bearing shims 2-3 are added between the tapered roller bearings 2-2 to separate them, preventing the lower tapered roller bearing 2-2 from jamming due to gravity. The tapered roller bearings 2-2 have a large radial load capacity, and their long service life can also be guaranteed.

[0042] The support column 2-1 is a cylindrical structure. Two support columns 2-1 are symmetrically arranged on both sides of the axis of symmetry. The distance between the two parallel support columns 2-1 is 450-500mm. Within this distance range, the cylindrical workpiece can be supported more stably, improving the accuracy of the self-aligning operation. Preferably, the distance between the two support columns 2-1 is 480mm. The height of the support column 2-1 is 1500-2500mm. The height setting of the support column 2-1 can also better accommodate cylindrical workpieces with a height of 1000-1500mm without affecting the loading and unloading of the cylindrical workpiece. Preferably, the height of the support column 2-1 is 2000mm.

[0043] Several rotating support seats 2-4 are distributed on the worktable according to the diameter of the cylindrical workpiece and are located outside the first support rolling mechanism. Several rotating support seats 2-4 are respectively arranged in the first support area and the second support area on the worktable. Several rotating support seats 2-4 arranged in the first support area are close to the two support columns 2-1, and several rotating support seats 2-4 arranged in the second support area are located in the extension direction of the pre-tightening mechanism. The rotating support seats 2-4 are arranged in different positions to provide more comprehensive and effective support at the bottom of the cylindrical workpiece.

[0044] The number of the rotating support seats 2-4 is odd. An odd number of the rotating support seats 2-4 are provided in the first support area, and an even number of the rotating support seats 2-4 are provided in the second support area. Among them, one of the rotating support seats 2-4 in the first support area is distributed on the axis of symmetry and is arranged parallel to the axis of symmetry. This rotating support seat 2-4 is located at the center position between two support columns 2-1. The even number of rotating support seats 2-4 in the first support area and the second support area are symmetrically distributed on both sides of the axis of symmetry. The symmetrically distributed even number of rotating support seats 2-4 can provide more stable and balanced support at the bottom of the cylindrical workpiece.

[0045] The rotating support 2-4 includes a roller housing 2-4-3, which is sleeved on the roller shaft 2-4-2 via a deep groove ball bearing 2-4-5. The roller shaft 2-4-2 is mounted on the roller bracket 2-4-1 via an end cap 2-4-4. The roller bracket 2-4-1 is detachably mounted on the worktable via a mounting flange. The bottom of the cylindrical workpiece is placed on the roller housing 2-4-3. When the pre-tightening mechanism pushes the cylindrical workpiece to achieve center adjustment, the cylindrical workpiece slides horizontally on the roller housing 2-4-3. When the rotating mechanism drives the cylindrical workpiece to rotate, the cylindrical workpiece and the rotating support 2-4 also experience rolling friction during the rotation process. To accommodate cylindrical workpieces of different sizes, multiple mounting holes for easy installation of the rotating support 2-4 can be pre-drilled on the worktable. When accommodating cylindrical workpieces of different sizes, the position of the rotating support 2-4 can be adjusted to point to different centers, thus enabling the rotational movement of cylindrical workpieces of different diameters.

[0046] The projection of the axis of the roller shaft 2-4-2 contained in the even number of rotating support seats 2-4 in the first support area and the second support area onto the worktable forms an angle with the axis of the axis of symmetry. When it is necessary to adjust the angle, the roller bracket 2-4-1 and the mounting flange can be removed first. Since the mounting flange has several screw holes that can match the mounting holes of the roller bracket 2-4-1 around the center of the mounting flange, when the angle adjustment requirement is met to accommodate the placed cylindrical workpiece, the mounting holes on the removed roller bracket 2-4-1 can be connected to the screw holes at appropriate positions on the mounting flange. This can fix the roller bracket 2-4-1 and change the angle at the same time.

[0047] The pre-tightening mechanism includes a pre-tightening electric cylinder 1-1. The fixed end of the pre-tightening electric cylinder 1-1 is mounted on the worktable via a connector. The telescopic end of the pre-tightening electric cylinder 1-1 is connected to the rotating mechanism. The connector includes a rear adapter plate 1-8 and a front adapter plate 1-7. Both the rear adapter plate 1-8 and the front adapter plate 1-7 are located on the worktable. Electrical limit switches are provided before and after the pre-tightening electric cylinder 1-1 to ensure that the cylinder stroke is within a certain range. The pre-tightening electric cylinder 1-1 mainly plays the role of pushing the workpiece to move horizontally, thereby adjusting the center position of the workpiece. After reaching the designated position, the pre-tightening electric cylinder 1-1 switches its operating mode to maintain a certain thrust output, so that the workpiece is in a tight state.

[0048] The rotating mechanism includes a hub motor 1-3, which is connected to the telescopic end of the pre-tensioning electric cylinder 1-1 via a motor adapter plate 1-5 and a fixed pin 1-10. The pre-tensioning mechanism drives the hub motor 1-3 to reciprocate linearly, ensuring that the wheel is in close contact with the inner wall of the cylindrical workpiece. The wheel material of the hub motor 1-3 is made of high wear-resistant and high-friction polyurethane. The thrust of the pre-tensioning electric cylinder 1-1 and the driving force of the hub motor 1-3 together act on the cylindrical workpiece, and the static friction between the two acts as the rotation driving force, driving the workpiece to rotate.

[0049] A sliding mechanism is also provided between the rotating mechanism and the worktable. The sliding mechanism includes a slider 1-11 and a guide rail 1-12 for linear sliding of the slider 1-11. The slider 1-11 is mounted on the motor adapter plate 1-5, and the guide rail 1-12 is mounted on the worktable via a guide rail adapter plate 1-6. The sliding range and direction of the slider 1-11 in the guide rail 1-12 are consistent with the extension and retraction range and direction of the pre-tensioning electric cylinder 1-1. Through the cooperative arrangement of the slider 1-11 and the guide rail 1-12, the extension and retraction process of the pre-tensioning electric cylinder 1-1 is ensured. To meet the straightness requirements, the guide rail adapter plate 1-6, the electric cylinder front adapter plate 1-7, and the electric cylinder rear adapter plate 1-8 mainly serve as adapters and supports. The installation contact surfaces are machined with high precision to ensure that the pre-tensioned electric cylinder 1-1 can extend and retract without jamming. A rotary drive adapter plate 1-9 is also provided on the workbench. The rotary drive adapter plate 1-9 integrates the electric cylinder driver 1-2 and the motor driver 1-4. The electric cylinder driver 1-2 and the motor driver 1-4 are electrically connected to the pre-tensioned electric cylinder 1-1 and the hub motor 1-3, respectively, making the structure more compact and the debugging and maintenance more convenient.

[0050] The large metal cylinder section automatic self-aligning vertical rotating mechanism also includes a control system 3. The control system 3 includes a center adjustment module and a rotation module. The center adjustment module controls the operation of the pre-tightening mechanism, and the rotation module controls the operation of the rotating mechanism. The operation flow of the control system 3 is as follows: Figure 5As shown, the cylindrical workpiece is positioned on the rotating support 2-4. The pre-tensioning electric cylinder 1-1 starts operating, driving the hub motor 1-3 to move, causing the wheels to push the cylindrical workpiece. When the electric cylinder driver 1-2 detects that the pre-tensioning motor current is greater than or equal to the target pre-tensioning current value, the workpiece is in the designated position, i.e., the three-point locking position. At this time, the torque mode of the pre-tensioning electric cylinder 1-1 is switched to maintain a suitable constant thrust output, thereby ensuring the stability of the cylindrical workpiece's center position. Then, the hub motor 1-3 starts operating, driving the cylindrical workpiece to rotate through the static friction between the wheel surface and the inner wall of the cylindrical workpiece. The cylindrical workpiece can only rotate normally when the static friction f_static between it and the hub motor 1-3 is greater than the rolling friction it experiences. During the rotation of the cylindrical workpiece, it must simultaneously overcome the rolling friction f_1 between the cylindrical workpiece and the rotating support 2-4, the rolling friction f_2 between the cylindrical workpiece and the tapered roller bearing 2-2, and the rolling friction f_3 between the wheel surface and the inner wall of the cylindrical workpiece.

[0051] The thrust of the pre-tensioning electric cylinder 1-1 has a significant impact on adjusting the position of the cylindrical workpiece and driving its rotation. When adjusting the position of the cylindrical workpiece, the thrust fd1 needs to overcome the sliding friction between the cylindrical workpiece and the rotating support 2-4. After reaching the desired position, the magnitude of the thrust fd2 directly affects the magnitude of the static friction. Only an appropriate fd2 can ensure that the hub motor 1-3 drives the workpiece to rotate without slippage.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0053] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A large-scale metal cylinder section automatic self-aligning vertical rotating mechanism, characterized in that: It includes an adjustment drive device and a support rolling device mounted on a workbench. The support rolling device includes a first support rolling mechanism and a second support rolling mechanism. The first support rolling mechanism rolls in contact with the inner wall of the cylindrical workpiece. The first support rolling mechanism includes two vertically and parallelly arranged support rolling elements. The second support rolling mechanism is used to support the bottom of the cylindrical workpiece. The second support rolling mechanism includes several rotating support seats. The adjustment drive device includes a pre-tightening mechanism that moves in a straight line and a rotating mechanism connected to the pre-tightening mechanism. During operation, the rotating mechanism abuts against the inner wall of the cylindrical workpiece under the drive of the pre-tightening mechanism and drives the cylindrical workpiece to rotate. With the direction of movement of the pre-tightening mechanism as the axis of symmetry, the two supporting rolling elements and several rotating support seats are symmetrically distributed on both sides of the axis of symmetry on the worktable; When the cylindrical workpiece is placed on the vertical rotating mechanism for self-alignment, the bottom of the cylindrical workpiece is first placed on the rotating support seat. The pre-tightening mechanism drives the rotating mechanism to move away from the first supporting rolling mechanism until the two supporting rolling elements abut against the inner wall of the cylindrical workpiece in line contact, and the rotating mechanism abuts against the inner wall of the cylindrical workpiece in surface contact. The above three contact positions are projected onto the worktable in the vertical direction to form a triangular structure. Under the rotational driving action of the rotating mechanism, the cylindrical workpiece rotates around the geometric center axis of the cylindrical workpiece.

2. The automatic self-aligning vertical rotating mechanism for large metal cylinder sections according to claim 1, characterized in that: The supporting rolling element includes a supporting column and several tapered roller bearings. The tapered roller bearings are rotatably mounted on the supporting column along the height direction of the supporting column, and a bearing washer is provided between two adjacent tapered roller bearings.

3. The automatic self-aligning vertical rotating mechanism for large metal cylinder sections according to claim 2, characterized in that: The supporting column is a cylindrical structure, with two supporting columns symmetrically arranged on both sides of the axis of symmetry. The distance between the two parallel supporting columns is 450-500mm, and the height of the supporting column is 1500-2500mm.

4. The automatic self-aligning vertical rotating mechanism for large metal cylinder sections according to claim 3, characterized in that: Several of the rotating support seats are distributed on the worktable according to the diameter of the cylindrical workpiece and are located outside the first support rolling mechanism; Several rotating support seats are respectively disposed in a first support area and a second support area on the worktable. The several rotating support seats disposed in the first support area are close to the two support columns, and the several rotating support seats disposed in the second support area are located in the extension direction of the pre-tightening mechanism.

5. The large metal cylinder section automatic self-aligning vertical rotating mechanism according to claim 4, characterized in that: The number of the plurality of said rotating support seats is odd, with an odd number of said rotating support seats provided in the first support area and an even number of said rotating support seats provided in the second support area; Wherein, one of the rotating support seats in the first support area is distributed on the axis of the axis of symmetry and is arranged parallel to the axis of the axis of symmetry; The even number of rotating support seats in the first support area and the second support area are symmetrically distributed on both sides of the axis of symmetry.

6. The automatic self-aligning vertical rotating mechanism for large metal cylinder sections according to claim 5, characterized in that: The rotating support includes a roller housing, which is sleeved on the roller shaft via a deep groove ball bearing. The roller shaft is mounted on the roller bracket via an end cover, and the roller bracket is detachably mounted on the worktable via a mounting flange.

7. The automatic self-aligning vertical rotating mechanism for large metal cylinder sections according to claim 6, characterized in that: The projection of the axis of the roller shaft contained in the even number of rotating supports in the first support area and the second support area onto the worktable forms an angle with the axis of the axis of symmetry.

8. The automatic self-aligning vertical rotating mechanism for large metal cylinder sections according to claim 1, characterized in that: The pre-tightening mechanism includes a pre-tightening electric cylinder. The fixed end of the pre-tightening electric cylinder is mounted on the workbench via a connector, and the telescopic end of the pre-tightening electric cylinder is connected to the rotating mechanism.

9. The large metal cylinder section automatic self-aligning vertical rotating mechanism according to claim 8, characterized in that: The rotating mechanism includes a hub motor, which is connected to the telescopic end of the pre-tensioned electric cylinder via a motor adapter plate and a fixed pin.

10. The large metal cylinder section automatic self-aligning vertical rotating mechanism according to claim 9, characterized in that: A sliding mechanism is also provided between the rotating mechanism and the worktable. The sliding mechanism includes a slider and a guide rail for the slider to slide linearly. The slider is mounted on the motor adapter plate, and the guide rail is mounted on the worktable through the guide rail adapter plate.

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