A large size flange rounding tool

Abstract

The present invention relates to the field of carbon fiber container processing equipment, and in particular to a large-size flange rounding tool, comprising: two fixing frames, the two fixing frames are arranged opposite to each other, and at least one of the fixing frames is arranged to be linearly movable so that the two fixing frames can move away from each other or close to each other; two shaping rings, the two shaping rings are respectively connected to one of the fixing frames, and the shaping rings are provided with a plurality of adjusting parts that can be radially extended and retracted along the shaping rings at intervals along their circumference, and the inner end of the adjusting part is provided with a connecting part that can be connected to the flange. The present invention can maintain the shape of the flange stable during the bonding process of the calibrated flange through the shaping ring, and effectively solves the problems existing in the prior art.

Description

Technical Field

[0001] The invention relates to the field of carbon fiber container processing equipment, and in particular to a large-size flange rounding tool. Background Art

[0002] After the winding process, the large-volume carbon fiber tank needs to be bonded and fixed with a flange on the surface to facilitate fixing the entire tank through the flange during use. Among them, the common structural form of the tank is the tank structure shown in the patent disclosed in the application number 202211438051.3. Since the radial dimension of the flange of this type of tank is often large (the diameter is generally more than 120 cm, which is considered to be a large-size flange), the flange is prone to deformation during the installation process. When the flange is mounted on the outside of the tank that has been wrapped with carbon fiber, the flange is prone to deformation, resulting in uneven stress distribution at the contact position with the carbon fiber, which not only affects the stability of the flange bonding, but also easily causes the uneven stress distribution between the flange and the tank. The difference in local shape fit causes stress concentration at the flange bonding position, affecting the safety of use.

[0003] At present, in the processing process, the flange ring is usually corrected by a roundness detection box before being mounted on the tank, and then the flange is directly mounted on the tank outer part for welding (carbon fiber is bonded). In this way, when the flange is mounted on the tank liner and bonded, the flange will deform again due to gravity, changes in the inflation pressure of the tank liner, etc. Based on this, the present application proposes a large-size flange roundness correction tool to solve the deformation problem of the flange when bonding on the outside of the carbon fiber tank. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a large-size flange calibration tool, which can maintain the stability of the flange shape during the bonding process of the calibrated flange through a calibrating ring, effectively solving the problems existing in the prior art.

[0005] In order to solve the above problems, the present invention provides a large-size flange rounding tool, including: two fixing frames, the two fixing frames are arranged opposite to each other, and at least one of the fixing frames is arranged to be linearly movable so that the two fixing frames can move away from each other or closer to each other; two shaping rings, the two shaping rings are respectively connected to one of the fixing frames, and the shaping rings are provided with a plurality of adjusting parts that can be radially extended and retracted along the shaping rings at intervals along their circumference, and the inner ends of the adjusting parts are provided with a connecting part that can be connected to the flange.

[0006] Furthermore, the bottom of the shaping ring is connected to the fixing frame at the corresponding position, and the roundness correction tool also includes a retractable shaping rod, and the fixing frame and the shaping ring are respectively provided with a connecting structure that can be connected to the shaping rod; a plurality of shaping rods are installed at intervals on at least the upper half of the outer edge of the shaping ring between the shaping ring and the fixing frame at the corresponding position; a plurality of shaping rods are installed at intervals along at least the upper half of the outer edge of the shaping ring between the two shaping rings.

[0007] Furthermore, the shaping rod comprises a sleeve and a rod body threadedly screwed on both ends of the sleeve.

[0008] Furthermore, the adjusting member includes an adjusting tube and adjusting rods threadedly engaged at both ends of the adjusting tube, one of the adjusting rods is welded to the flange, and the other adjusting rod is connected to the shaping ring.

[0009] Furthermore, the flange is provided with two molded areas at intervals along its axial direction, and the two molded areas are respectively connected to the adjusting parts, wherein the flange is provided with a plurality of notches at intervals along the circumference of the flange in at least one of the molded areas, and the flange is connected to the adjusting part between two adjacent notches.

[0010] Furthermore, the flange is provided with a plurality of ears at intervals along its circumference, the ears are provided with through holes, the adjusting member includes a slider hinged on the through hole, a support rod threadedly engaged with the slider, the molding ring is provided with a slide groove cooperating with the slider, and the support rod is rotatably installed on the molding ring.

[0011] Furthermore, the roundness calibration tool also includes a model ring, which can be detachably connected to the shaping ring. When the model ring is installed on the shaping ring, the outer surface of the model ring can be positioned and fit with the inner surface of the flange.

[0012] Furthermore, the outer edge of the model ring is connected to the shaping ring by bolts.

[0013] Furthermore, the model ring is provided with a plurality of pressure sensors at intervals along its circumference, and the detection ends of the pressure sensors are located on the outer surface of the model ring.

[0014] Furthermore, the model ring includes a model ring body and a support ring slidably mounted on the model ring body, the support ring being provided with a plurality of through grooves spaced apart along its circumference, and the model ring body being provided with the pressure sensor at positions corresponding to the through grooves; the support ring being able to slide between a supporting position and an avoidance position, and the outer surface of the support ring being able to be positioned and fitted with the inner surface of the flange when the support ring is in the supporting position, and a gap being provided between the outer surface of the support ring and the inner surface of the flange when the support ring is in the avoidance position, and a locking structure being provided between the support ring and the model ring body, and the locking structure being able to position the support ring in the supporting position.

[0015] The beneficial effect of the present invention is that the flange can be calibrated by the calibrating ring to maintain the stability of the flange shape during the bonding process, which effectively solves the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the embodiment shown in the figure after the flange is aligned with the right shaping ring.

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the model ring in the illustrated embodiment.

[0020] Figure 4 It is a schematic diagram of the local structure of the shaping ring and the flange at the position of the adjusting rod in the present invention.

[0021] Figure 5 for Figure 3 The diagram is a partial cross-sectional view of the structure of the model ring when it is installed on the calibrating ring at the through groove position.

[0022] Figure 6 for Figure 1 A schematic diagram of the structure of the left shaping ring in the illustrated embodiment.

[0023] Figure 7 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0024] Among them: 1. fixing frame; 2. shaping ring; 3. shaping rod; 301. sleeve; 302. branch rod body; 4. adjusting tube; 5. adjusting rod; 6. notch; 7. ear piece; 8. slider; 9. support rod; 10. model ring; 1001. model ring body; 1002. support ring; 11. bolt; 12. pressure sensor; 13. through groove; 14. screw; 15. flange; 16. flange; 17. storage tank. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0026] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0027] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0030] In the present invention, if Figure 1-7 As shown, a large-size flange rounding tool is provided, including: two fixing frames 1, the two fixing frames 1 are arranged opposite to each other, and at least one of the fixing frames 1 is arranged to be linearly movable so that the two fixing frames 1 can move away from each other or closer to each other; two shaping rings 2, the two shaping rings 2 are respectively connected to one of the fixing frames 1, and the shaping ring 2 is provided with a plurality of adjusting parts that can be radially extended and retracted along the shaping ring 2 at intervals along its circumference, and the inner end of the adjusting part is provided with a connecting part that can be connected to the flange 16.

[0031] When the roundness correction tool of the present invention is used, the flange 16 is moved to the inner side of the shaping ring 2, and the flange 16 is connected to the shaping ring 2 through the adjusting member. At this time, the roundness of the flange 16 can be detected, and the flange 16 can be corrected by extending and retracting the adjusting member. After the flange 16 is corrected, the bonding process of the flange 16 on the outer side of the tank 17 can be carried out. The tank wrapped with carbon fiber is placed between the two fixing frames 1. At this time, the tank 17 and the flange 16 can be pre-treated for bonding, and then the fixing frame 1 is moved so that the flange 16 is gradually mounted on the outer side of the tank for bonding. During the bonding process of the flange 16, the adjusting member always supports and fixes the flange 16 to keep the flange 16 in the state after the roundness correction, thereby preventing the flange 16 from deforming during the bonding and curing process, so as to maintain the stable bonding of the flange 16.

[0032] It should be noted that the improvement of the present invention lies in the flange rounding tooling part, and there is no restriction on the linearly movable mode of the fixing frame 1. In the optional embodiments, those skilled in the art can flexibly select and implement, for example, laying the ground rail, the bottom of the fixing frame 1 can be slidably set on the ground rail, and the fixing frame 1 is driven to move linearly by the cylinder or the screw mechanism. Among them, one fixing frame 1 can be set to be linearly movable, and two fixing frames 1 can also be set to be linearly movable.

[0033] As for the fixing method of the storage tank 17, it is preferred that a support seat fixed to the mouth of the storage tank 17 can be provided between the two fixing frames 1. Those skilled in the art can flexibly implement the fixing method for this part of the structure, for example, by using a support ring 1002 that can be connected to the mouth of the storage tank 17 (the support ring 1002 is connected to the mouth of the storage tank 17 by bolts 11), and the support ring 1002 is fixed to the external bracket by a connecting rod passing through the shaping ring 2 and the fixing frame 1.

[0034] In a preferred embodiment, for the structure of the present invention, further specifically, the bottom of the sizing ring 2 is connected to the fixing frame 1 at the corresponding position (at Figure 1 In the embodiment shown, the bottom of the shaping ring 2 is provided with a plate-like structure connected to the fixing frame 1), the roundness correction tool also includes a retractable shaping rod 3, and the fixing frame 1 and the shaping ring 2 are respectively provided with a connecting structure that can be connected to the shaping rod 3;

[0035] A plurality of shaping rods 3 are installed at intervals between the shaping ring 2 and the fixing frame 1 at a corresponding position on at least the upper half of the outer edge of the shaping ring 2;

[0036] A plurality of shaping rods 3 are installed at intervals between the two shaping rings 2 along at least the upper half of the outer edge of the shaping ring 2 .

[0037] like Figure 1 As shown, by providing a shaping rod 3, during assembly, the shaping ring 2 can be connected to the fixing frame 1 at the corresponding position through the shaping rod 3 to keep the relative position between the shaping ring 2 and the fixing frame 1 stable, thereby controlling the relative distance between the shaping ring 2 and the fixing frame 1 to be stable.

[0038] By arranging the shaping rod 3 between the two shaping rings 2 , during the bonding process, the shaping rod 3 can be used to perform auxiliary support and fixation between the two shaping rings 2 , so as to further maintain the position stability of the shaping rings 2 .

[0039] In a preferred embodiment, for the structure of the present invention, further specifically, as Figure 1 As shown, the shaping rod 3 includes a sleeve 301 and a rod body 302 threadedly screwed on both ends of the sleeve 301 .

[0040] like Figure 1 and Figure 2 , Figure 6As shown, the fixing frame 1 and the shaping ring 2 are respectively provided with through holes for the branch rod body 302 to pass through, and the branch rod body 302 can be screwed together with positioning nuts on both sides of the shaping ring 2 or the fixing frame 1 at the corresponding position. After the shaping rod 3 is preliminarily installed between the shaping ring 2 and the fixing frame 1, the length of the shaping rod 3 can be further fine-tuned by rotating the sleeve 301 to adjust the angle of the shaping ring 2 on the vertical plane. When the sleeve 301 between the two shaping rings 2 is installed, the branch rod bodies 302 on both sides of the sleeve 301 pass through the shaping rings 2 at the corresponding positions, and the branch rod bodies 302 are screwed together with positioning nuts on both sides of the shaping ring 2 at the corresponding positions, so that after the shaping rod 3 is preliminarily installed between the two shaping rings 2, the length of the shaping rod 3 between the two shaping rings 2 can be fine-tuned by rotating the sleeve 301.

[0041] In an optional embodiment, other forms of retractable shaping rods may also be used, such as a shaping rod in the form of an electric retractable rod or a hydraulic retractable rod.

[0042] In a preferred embodiment, for the structure of the present invention, more specifically, the adjusting member includes an adjusting tube 4 and adjusting rods 5 threadedly engaged at both ends of the adjusting tube 4, one of the adjusting rods 5 is welded to the flange 16, and the other adjusting rod 5 is connected to the molding ring 2.

[0043] like Figures 1 to 2 4 to 6, when the adjusting member is connected to the shaped ring 2 and the flange 16, an adjusting rod 5 can be welded and fixed on the flange 16 in advance, and then another adjusting rod 5 is passed through the shaped ring 2. After the position of the flange 16 is adjusted, the inner and outer sides of the adjusting rod 5 passing through the shaped ring 2 are fixed by nuts. When the roundness of the flange 16 is further corrected, the adjusting tube 4 can be rotated to realize the radial deformation of the flange 16 driven by the adjusting rod 5 at the corresponding position, so as to realize the radial deformation adjustment of the flange 16.

[0044] Among them, regarding the welding method of the flange 16 and the adjusting rod 5, preferably, a positioning hole for inserting the adjusting rod 5 can be provided in the flange 16, and the adjusting rod 5 is welded in the positioning hole.

[0045] In a preferred embodiment, the structure of the present invention is further optimized in that the flange 16 is provided with two molded areas at intervals along its axial direction, and the two molded areas are respectively connected to the adjusting parts, wherein the flange 16 is provided with a plurality of notches 6 at intervals along the circumference of the flange 16 in at least one of the molded areas, and the flange 16 is connected to the adjusting part between two adjacent notches 6.

[0046] like Figure 4As shown, by setting two shaping areas, two adjustment areas can be set in the axial direction of the flange 16, so as to facilitate the roundness correction of the flange 16 in the axial direction. At the same time, by setting the notch 6 in the flange 16, the deformation capacity of the flange 16 at the corresponding deformation area position can be improved, so as to facilitate the release of the local stress of the flange 16, and then facilitate the roundness correction and adjustment of the flange 16.

[0047] exist Figure 4 In the embodiment shown, a notch 6 is provided in one of the profiled regions.

[0048] exist Figure 1 In the embodiment shown, further specifically, as Figure 2 and Figure 4 As shown, the flange 16 is provided with a plurality of ear pieces 7 at intervals along its circumference, the ear piece 7 is provided with a through hole, the adjusting member includes a slider 8 hinged on the through hole, a support rod 9 threadedly engaged with the slider 8, the shaping ring 2 is provided with a slide groove cooperating with the slider 8, and the support rod 9 is rotatably installed on the shaping ring 2.

[0049] like Figure 4 and Figure 5 As shown, for the flange 16 provided with the ear piece 7 , the through hole at the position of the ear piece 7 can be used as the connection position of the adjusting member, so that the adjusting member can be conveniently fixed on the flange 16 .

[0050] exist Figure 1 In the illustrated embodiment, an ear plate corresponding to the ear piece 7 is provided at the bottom of the sliding block 8, and the ear plate is connected to the ear piece 7 via a latch.

[0051] In a preferred embodiment, for the structure of the present invention, a further optimized setting is that the roundness calibration tool also includes a model ring 10, and the model ring 10 can be detachably connected to the shaping ring 2. When the model ring 10 is installed on the shaping ring 2, the outer surface of the model ring 10 can be positioned and fit with the inner surface of the flange.

[0052] like Figure 3 and Figure 5As shown, the model ring 10 uses an annular structure that is consistent with the design shape of the actual flange 16 installation position of the tank 17. In this way, when the flange 16 is fixed to the inner layer of the sizing ring 2, the flange 16 can be pre-sleeved on the outer side of the model ring 10, and then the model ring 10 is positioned and connected to the sizing ring 2. At this time, the flange 16 is connected to the sizing ring 2 through an adjusting member. After the flange 16 is fixedly connected through the adjusting member, the model ring 10 can be removed. Through such a setting, the flange 16 can be quickly positioned and installed on the inner side of the sizing ring 2, and the coaxiality between the flange 16 and the sizing ring 2 can be ensured, so as to facilitate the flange 16 to be sleeved on the outer side of the tank 17. Moreover, by sleeved the flange 16 on the outer side of the model ring 10, the model ring 10 can be used to perform preliminary roundness correction on the flange 16 to reduce the difficulty of further roundness correction.

[0053] exist Figure 1 In the illustrated embodiment, for the structure of the present invention, to be more specific, the outer edge of the model ring 10 is connected to the sizing ring 2 by bolts 11 .

[0054] like Figure 3 As shown, the outer edge of the model ring 10 is provided with an ear plate, the ear plate is connected with a support tube, the bolt 11 passes through the ear plate and the support tube, the support tube corresponds to the position where the shaping rod 3 is installed on the shaping ring 2, and the bolt 11 is fixed by using the hole for installing the branch rod body 302 of the shaping rod 3. In order to further facilitate the coaxial positioning and fixing between the model ring 10 and the shaping ring 2, as shown in FIG. Figure 5 In the illustrated embodiment, the model ring 10 is further provided with a positioning flange 15 which is sleeved on the outer side of the edge of the shaping ring 2 .

[0055] In a preferred embodiment, a further optimized setting for the structure of the present invention is that the model ring 10 is provided with a plurality of pressure sensors 12 at intervals along its circumference, and the detection ends of the pressure sensors 12 are located on the outer surface of the model ring 10 .

[0056] By arranging pressure sensors 12 on the circumference of the model ring 10, after the flange 16 is mounted on the model ring 10, the model ring 10 is connected to the shaping ring 2, and the adjusting member is connected to the flange 16 and the shaping ring 2, the adjusting member can be further telescopically adjusted by the pressure values ​​borne by each pressure sensor 12 to adjust the pressure of the flange 16 on the model ring 10, so that the force of the flange 16 on the model ring 10 is more balanced, and then when the model ring 10 is removed and mounted on the outside of the tank 17, the adjusted flange 16 can make the force between the tank 17 and the flange 16 more balanced, thereby preventing uneven deformation caused by uneven force on the tank 17, so as to further improve the bonding stability of the flange 16.

[0057] In a preferred embodiment, for the structure of the present invention, further specifically, the model ring 10 includes a model ring body 1001, a support ring 1002 slidably mounted on the model ring body 1001, the support ring 1002 is provided with a plurality of through grooves 13 at intervals along its circumference, and the model ring body 1001 is provided with the pressure sensor 12 at a position corresponding to the through groove 13;

[0058] The support ring 1002 can slide between a supporting position and an avoidance position. When the support ring 1002 is in the supporting position, the outer surface of the support ring 1002 can be positioned and fitted with the inner surface of the flange 16. When the support ring 1002 is in the avoidance position, there is a gap between the outer surface of the support ring 1002 and the inner surface of the flange 16 circle. A locking structure is provided between the support ring 1002 and the model ring body 1001, and the locking structure can position the support ring 1002 in the supporting position.

[0059] exist Figure 1 In the embodiment shown, the locking structure is configured as a plurality of screws 14 rotatably mounted on the support ring 1002, the screws 14 passing through the model ring body 1001, and the support ring 1002 can be moved axially on the model ring 10 by rotating the screws 14, so that the support ring 1002 can move between the supporting position and the avoidance position. The form of the structure shown is not limited to the form of screws, and in an optional embodiment, the form of an electric telescopic rod or a hydraulic telescopic rod can also be selected to drive the support ring 1002 to move.

[0060] In specific operation, when the flange 16 is put on the model ring 10, the support ring 1002 is positioned at the support position, and the support ring 1002 can be used to position and perform preliminary roundness correction on the flange 16. After the adjustment member is connected to the flange 16 and the sizing ring 2, the support ring 1002 can be moved to the avoidance position, at which time the flange 16 is fixed to the adjustment member, and the pressure sensor 12 can intuitively obtain the inward force of the flange 16 at each point. According to the values ​​measured by each pressure sensor 12, the expansion and contraction amount of the adjustment member can be further fine-tuned so that the data measured by each pressure sensor 12 are roughly the same (one way is to take the average after removing the maximum and minimum values, and the change range of the maximum and minimum values ​​and the average value is controlled to be less than or equal to 10%).

[0061] exist Figure 5 In the illustrated embodiment, the outer surface of the support ring 1002 is conical, and the support ring 1002 can avoid the flange 16 by a small movement. This does not limit the present invention. In an optional embodiment, when the outer surface of the support ring 1002 is a cylindrical surface, the support ring 1002 can also be pushed away from the flange 16 as a whole to separate to achieve avoidance.

[0062] It should be noted that the embodiments of the present invention are as follows Figure 1 The ellipsoid tank shown in the figure is used for explanation. In order to facilitate the installation of the flange 16, the flange 16 of this type of tank 17 is divided into two parts, a left flange and a right flange. The left flange and the right flange are fixed and shaped by a shaping ring 2 respectively. The left flange and the right flange are bonded or welded at the center line position of the tank 17. This is not intended to be a limitation of the present invention. In an optional embodiment, the flange 16 can also be set as a single flange structure.

[0063] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0064] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A large-size flange rounding tool, characterized in that: include: Two fixing frames, the two fixing frames are arranged opposite to each other, and at least one of the fixing frames is arranged to be linearly movable, so that the two fixing frames can move away from each other or towards each other; Two shaping rings, each of which is connected to one of the fixing frames, and each shaping ring is provided with a plurality of adjusting members which can be extended and retracted along the radial direction of the shaping ring at intervals along its circumference, and the inner end of each adjusting member is provided with a connecting portion which can be connected to a flange; The bottom of the shaping ring is connected to the fixing frame at the corresponding position, the roundness correction tool also includes a retractable shaping rod, and the fixing frame and the shaping ring are respectively provided with a connecting structure that can be connected to the shaping rod; A plurality of shaping rods are installed at intervals between the shaping ring and the fixing frame at the corresponding position on at least the upper half of the outer edge of the shaping ring; A plurality of shaping rods are installed at intervals between the two shaping rings along at least the upper half of the outer edges of the shaping rings.

2. A large-size flange rounding tool according to claim 1, characterized in that: The shaping rod comprises a sleeve and a branch rod body which is screwed on both ends of the sleeve.

3. A large-size flange rounding tool according to claim 1, characterized in that: The adjusting member comprises an adjusting tube and adjusting rods threadedly engaged at two ends of the adjusting tube, wherein one of the adjusting rods is welded to the flange, and the other adjusting rod is connected to the shaping ring.

4. A large-size flange rounding tool according to claim 3, characterized in that: The flange is provided with two molded areas at intervals along its axial direction, and the two molded areas are respectively connected to the adjusting parts, wherein the flange is provided with a plurality of notches at intervals along the circumference of the flange in at least one of the molded areas, and the flange is connected to the adjusting part between two adjacent notches.

5. The large-size flange rounding tool according to claim 1 is characterized in that: The flange is provided with a plurality of ears at intervals along its circumference, and the ears are provided with through holes. The adjusting member includes a slider hinged on the through hole, a support rod threadedly engaged with the slider, the shaping ring is provided with a slide groove cooperating with the slider, and the support rod is rotatably installed on the shaping ring.

6. A large-size flange rounding tool according to claim 1, characterized in that: The roundness calibration tool also includes a model ring, which can be detachably connected to the calibrating ring. When the model ring is installed on the calibrating ring, the outer surface of the model ring can be positioned and fitted with the inner surface of the flange.

7. A large-size flange rounding tool according to claim 6, characterized in that: The outer edge of the mold ring is connected to the calibrating ring by bolts.

8. The large-size flange rounding tool according to claim 6 is characterized in that: The model ring is provided with a plurality of pressure sensors at intervals along its circumference, and the detection ends of the pressure sensors are located on the outer surface of the model ring.

9. A large-size flange rounding tool according to claim 8, characterized in that: The model ring comprises a model ring body, a support ring slidably mounted on the model ring body, the support ring is provided with a plurality of through grooves spaced apart along its circumference, and the model ring body is provided with the pressure sensor at a position corresponding to the through groove; The support ring can slide between a supporting position and an avoidance position. When the support ring is in the supporting position, the outer surface of the support ring can be positioned and fit with the inner surface of the flange. When the support ring is in the avoidance position, there is a gap between the outer surface of the support ring and the inner surface of the flange. A locking structure is provided between the support ring and the model ring body, and the locking structure can position the support ring in the supporting position.

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