A four-axis positioning vertical riveting jig

Abstract

The present invention discloses a four-axis positioning vertical riveting jig, belonging to the technical field of assembly of large-diameter thin-walled cylindrical parts. It includes a lower flange assembly, an upper flange assembly, and a column assembly; the top surface of the lower flange assembly and the bottom surface of the upper flange assembly are respectively a lower constraint surface and an upper constraint surface, and the lower constraint surface and the upper constraint surface are respectively used to connect with the circular steel frames at both ends of the large-diameter thin-walled cylindrical part; the lower flange assembly is provided with four groups of column assemblies, and all the column assemblies are connected to the upper flange assembly, and the column assemblies are used to support the upper flange assembly and adjust the height of the upper flange assembly. The four-axis positioning vertical riveting jig of the present invention has high support performance. The four-axis positioning belongs to over-positioning. The circumferential angles of the upper constraint surface and the lower constraint surface are mutually constrained by the four axes, with small axial length and circumferential angle deviation and high assembly accuracy. At the same time, the distance between the upper and lower flange assemblies can be adjusted to adapt to the assembly of large-diameter thin-walled cylindrical parts with different lengths.

Description

Technical Field

[0001] The invention relates to the technical field of large-diameter thin-walled cylindrical parts assembly, and in particular to a four-axis positioning vertical riveting frame. Background Art

[0002] There are two main solutions for the traditional vertical riveting jig for manufacturing and assembling large-diameter thin-walled cylindrical parts:

[0003] ①Please refer to Figure 1 The lower constraint frame is placed on a foundation with a high levelness, a column is erected in the center of the lower constraint frame, an axial constraint sleeve is installed between the lower constraint frame and the upper constraint frame to determine the length of the large-diameter thin-walled cylindrical part, and the diameter of the assembly holes on the upper and lower constraint frames determines the diameter of the large-diameter thin-walled cylindrical part.

[0004] Main disadvantages: The horizontality of the upper restraint frame is difficult to determine; it has high requirements for ground levelness; it is immovable; the upper restraint frame uses pins to limit circumferential rotation, and the upper and lower restraint frames will inevitably produce a certain circumferential torsional offset.

[0005] ②Please refer to Figure 2 The lower restraint frame is placed on a highly level foundation. Axial positioning columns are arranged circumferentially around the lower restraint frame. The column lengths are constant, determining the length of the large-diameter, thin-walled cylindrical component. The diameters of the assembly holes in the upper and lower restraint frames determine the diameter of the large-diameter, thin-walled cylindrical component. The relative levelness of the upper and lower restraint frames is better than in Scheme 1, and the circumferential torsional offset is smaller than in Scheme 1.

[0006] Main disadvantages: high requirements for ground levelness, cannot be moved, the length of the axial positioning column is fixed, if the length of the large diameter thin-walled cylindrical part changes, the column of corresponding length needs to be replaced. Summary of the Invention

[0007] The purpose of the present invention is to provide a four-axis positioning vertical riveting jig to solve the problem that the existing vertical riveting jig cannot take both assembly accuracy and height adjustment into consideration.

[0008] The technical solution of the present invention to solve the above technical problems is as follows:

[0009] A four-axis positioning vertical riveting frame includes: a lower flange assembly, an upper flange assembly and a column assembly; the upper flange assembly is arranged parallel to the upper part of the lower flange assembly, the top surface of the lower flange assembly and the bottom surface of the upper flange assembly are the lower constraint surface and the upper constraint surface respectively, and the lower constraint surface and the upper constraint surface are respectively used to connect with the circular steel frames at both ends of a large-diameter thin-walled cylindrical part; four groups of column assemblies are provided along the circumferential direction on the top of the lower flange assembly, all of which are connected to the upper flange assembly, and the column assemblies are used to support the upper flange assembly and adjust the height of the upper flange assembly.

[0010] The four-axis positioning vertical riveting jig of the present invention connects the upper and lower flange assemblies through the column assembly, and has high supporting performance. The four-axis positioning belongs to over-positioning. The circumferential angles of the upper and lower constraint surfaces are mutually constrained by the four axes. The axial length and circumferential angle offset are small, and the assembly accuracy is high. At the same time, the distance between the upper and lower flange assemblies can be adjusted through the column assembly, so as to adapt to the assembly of large-diameter thin-walled cylindrical parts with different lengths.

[0011] Further, the above-mentioned lower flange assembly and upper flange assembly are respectively provided with lower positioning holes and upper positioning holes corresponding to the column assembly; the column assembly includes a column, a positioning seat, a positioning rod, a centering sleeve and a height adjustment component; the positioning seat is fixedly arranged on the lower constraint surface, and the top and bottom of the positioning seat are respectively connected with the column and the positioning rod. The bottom end of the column extends into the corresponding lower positioning hole, and the column passes through the corresponding upper positioning hole; the centering sleeve and the height adjustment component are sleeved on the column in sequence from top to bottom. The top and bottom of the centering sleeve are respectively connected with the upper flange assembly and the height adjustment component, and the height adjustment component contacts the positioning seat.

[0012] Further, the above-mentioned centering sleeve includes an upper positioning ring, a connecting ring and a lower positioning ring connected in sequence; the inner diameters of the upper positioning ring, the connecting ring and the lower positioning ring are the same as the diameter of the column. The upper positioning ring extends into the upper positioning hole, and the lower positioning ring extends into the height adjustment component.

[0013] Further, the above-mentioned height adjustment component includes an axial positioning sleeve sleeved on the column. The bottom end of the axial positioning sleeve contacts the top end of the positioning seat, and the lower positioning ring extends into the inner side of the top of the axial positioning sleeve.

[0014] Further, the above-mentioned height adjustment component includes an axial positioning sleeve and at least one padding component sleeved on the column in sequence from bottom to top. The bottom end of the axial positioning sleeve contacts the top end of the positioning seat, and the lower positioning ring extends into the inner side of the top of the padding component at the uppermost position.

[0015] Further, the above-mentioned padding component includes a first sector ring and a second sector ring. The first sector ring and the second sector ring are connected end to end to form a ring, and the two sides of the first sector ring are flush with the two sides of the second sector ring respectively; one end of the first sector ring is rotatably connected to one end of the second sector ring through a connecting shaft, and the other end of the first sector ring is detachably connected to the other end of the second sector ring through a connecting component.

[0016] Further, the above-mentioned connecting component includes a wrench, a positioning block, a torsion spring and a clamping block; two positioning blocks are oppositely arranged on the first sector ring, a rotating shaft is arranged between the two positioning blocks, and the positioning block and the torsion spring are both sleeved on the rotating shaft. One end of the torsion spring is connected to the positioning block, and the other end of the torsion spring is connected to the first sector ring; a clamping hook is arranged on the positioning block, and the clamping block is arranged on the second sector ring and connected to the clamping hook.

[0017] Furthermore, the above-mentioned lower flange assembly is annular and includes a plurality of fan-shaped lower flange assembly units. All the lower flange assembly units are detachably connected end to end to form a ring. The lower flange assembly unit includes an upper plate surface and a lower plate surface. Radial stiffeners and circumferential stiffeners are provided between the upper plate surface and the lower plate surface. The upper plate surface, the lower plate surface and the radial stiffeners form a radially extending I-shaped steel structure, and the upper plate surface, the lower plate surface and the circumferential stiffeners form a circumferentially extending I-shaped steel structure.

[0018] Furthermore, a plurality of supports are provided at the bottom of the above-mentioned lower flange assembly. Supports correspond to the connection positions of adjacent lower flange assembly units, and supports also correspond to the lower positioning holes.

[0019] Furthermore, the above-mentioned upper flange assembly is annular and includes a plurality of fan-shaped upper flange assembly units. Wear-resistant sleeves are provided in the upper positioning holes.

[0020] The present invention has the following beneficial effects:

[0021] (1) The four-axis positioning vertical riveting jig of the present invention has high supporting performance. The four-axis positioning belongs to over-positioning. The circumferential angles of the upper constraint surface and the lower constraint surface are mutually constrained by the four axes. The axial length and the circumferential angle deviation are small, and the assembly accuracy is high. At the same time, the distance between the upper and lower flange assemblies can be adjusted by the column assembly, so as to adapt to the assembly of large-diameter thin-walled cylindrical parts with different lengths.

[0022] (2) The column of the present invention is positioned by the positioning rod and the positioning seat. Only by inserting the positioning rod into the lower positioning hole can the coaxiality of the column and the lower positioning hole be determined, so that the column has a higher perpendicularity with the lower constraint surface and does not need to be adjusted. Compared with the existing method of directly fixing the column by bolts and pins, the accuracy is higher and the installation is more convenient.

[0023] (3) The upper positioning ring of the centering sleeve of the present invention extends into the upper positioning hole of the upper flange assembly. Therefore, there is a large gap between the side wall of the positioning hole and the upper positioning ring, which is convenient for the upper flange assembly with a large size and heavy weight to slide on the four columns for height adjustment. At the same time, after the upper flange assembly is connected to the upper positioning ring, it has a high coaxiality with the column.

[0024] (4) The height adjustment component of the present invention includes an axial positioning sleeve sleeved on the column. By adjusting the length or the number of the axial positioning sleeves, the height of the upper flange assembly is adjusted, so as to adjust the distance between the upper constraint surface and the lower constraint surface to adapt to the assembly of large-diameter thin-walled cylindrical parts with different lengths.

[0025] (5) The height adjustment component of the present invention can also be composed of an axial positioning sleeve and multiple hoop-type heightening components. When it is necessary to adjust the height of the upper flange assembly, it is only necessary to raise the upper flange assembly by a small distance and sleeve the heightening component on the column from the side, without completely lifting the upper flange assembly off the column. The entire elevation process is simple, fast, time-saving and labor-saving.

[0026] (6) The four-axis positioning vertical riveting jig of the present invention can directly support large-diameter thin-walled cylindrical parts when placed on the factory floor. The column assembly can be inserted into the positioning holes and fixed by bolts to have high perpendicularity and parallelism, and can meet the requirements of high assembly accuracy.

[0027] (7) The lower flange assembly of the present invention is assembled and separated from the factory foundation. Compared with the existing concrete-cast foundation, it can be moved, has a lower requirement for the ground levelness, and has strong anti-interference ability. Even if the ground does not have a high levelness, it can still maintain the flatness of the lower constraint surface. Moreover, if there are defects such as depressions and scratches on the upper and lower constraint surfaces that affect the flatness, the upper and lower constraint surfaces can be reprocessed and adjusted to save costs. At the same time, it is also convenient to adjust the size of the upper and lower flange assemblies, and has a wide application range.

[0028] (8) The radial stiffeners in the lower flange assembly of the present invention and the upper and lower plates form a radially extending I-shaped steel structure, which can resist the external load of radial bending; the circumferential stiffeners and the upper and lower plates form a circumferential I-shaped steel structure, which can resist the external load of bending; thus, the overall lower flange assembly has extremely high stiffness, can support large-weight components, and has extremely strong anti-interference ability. Brief Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the existing axial single-column support (single-axis);

[0030] Figure 2 is a schematic structural diagram of the existing axial three-column support (three-axis);

[0031] Figure 3 is a schematic structural diagram of the four-axis positioning vertical riveting jig of the present invention;

[0032] Figure 4 is a schematic structural diagram of the lower flange assembly of the present invention;

[0033] Figure 5 is a schematic internal structural diagram of the lower flange assembly of the present invention;

[0034] Figure 6 is a schematic internal structural diagram of the lower flange assembly unit of the present invention;

[0035] Figure 7Schematic diagram of the external structure of the lower flange assembly unit of the present invention;

[0036] Figure 8 Schematic diagram of the structure of the support of the present invention;

[0037] Figure 9 Schematic diagram of the structure of the upper flange assembly of the present invention;

[0038] Figure 10 Schematic diagram of the connection structure between the column assembly, the lower flange assembly and the upper flange assembly of the present invention;

[0039] Figure 11 Schematic diagram of the connection structure between the column assembly and the lower flange assembly and the upper flange assembly when separated in the present invention;

[0040] Figure 12 Schematic diagram of the structure of the alignment sleeve of the present invention;

[0041] Figure 13 Schematic diagram of the structure of the heightening component of the present invention;

[0042] Figure 14 Another direction schematic diagram of the heightening component of the present invention;

[0043] Figure 15 Schematic diagram of the structure of the torsion spring of the present invention;

[0044] Figure 16 Schematic diagram of the structure when the heightening component of the invention is opened.

[0045] In the figure: 10 - lower flange assembly; 11 - lower constraint surface; 12 - lower positioning hole; 13 - lower flange assembly unit; 14 - upper plate surface; 15 - lower plate surface; 16 - radial reinforcing rib; 17 - circumferential reinforcing rib; 18 - support; 20 - upper flange assembly; 21 - upper constraint surface; 22 - upper positioning hole; 23 - upper flange assembly unit; 24 - wear-resistant sleeve; 30 - column assembly; 31 - column; 32 - positioning seat; 33 - positioning rod; 34 - alignment sleeve; 35 - height adjustment component; 36 - axial positioning sleeve; 40 - heightening component; 41 - first sector ring; 42 - second sector ring; 43 - connecting shaft; 44 - wrench; 45 - positioning block; 46 - torsion spring; 47 - clamping block; 48 - rotating shaft; 49 - clamping hook; 341 - upper positioning ring; 342 - connecting ring; 343 - lower positioning ring; 344 - guiding inclined surface. Detailed implementation manners

[0046] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0047] Please refer to Figure 3, this embodiment provides a four-axis positioning vertical riveting jig, including: a lower flange assembly 10, an upper flange assembly 20, and a column assembly 30. The upper flange assembly 20 is arranged parallel above the lower flange assembly 10. The top surface of the lower flange assembly 10 is a lower constraint surface 11, and the bottom surface of the upper flange assembly 20 is an upper constraint surface 21. The lower constraint surface 11 and the upper constraint surface 21 are parallel and are respectively used to connect with the circular steel frames at both ends of the large-diameter thin-walled cylinder. Four groups of column assemblies 30 are vertically arranged evenly along the circumference at the top of the lower flange assembly 10. The column assemblies 30 pass through the upper flange assembly 20 and are connected to the upper flange assembly 20. The column assemblies 30 are used to support the upper flange assembly 20 and adjust the height of the upper flange assembly 20, so as to adjust the distance between the lower constraint surface 11 and the upper constraint surface 21 to adapt to the assembly of large-diameter thin-walled cylinders with different lengths.

[0048] The four-axis positioning vertical riveting jig of the present invention has high support performance. The four-axis positioning belongs to over-positioning. The circumferential angles of the upper constraint surface 21 and the lower constraint surface 11 are mutually constrained by the four axes. The axial length and circumferential angle deviation are small, and the assembly accuracy is high. At the same time, the distance between the upper and lower flange assemblies can be adjusted by the column assembly 30 to adapt to the assembly of large-diameter thin-walled cylinders with different lengths.

[0049] Please refer to Figures 4 to 8 , the lower flange assembly 10 is integrally annular, and its bottom surface is connected with a support 18 by bolts. The lower flange assembly 10 of this embodiment is separated from the factory building foundation. Compared with the existing concrete-cast base, it is convenient to move, has a lower requirement for the ground flatness, and has strong anti-interference ability. Even if the ground does not have a high level of flatness, it can still maintain the flatness of the lower constraint surface 11. Moreover, if there are defects such as depressions and scratches on the lower constraint surface 11 that affect the flatness, the lower constraint surface 11 can be reprocessed and adjusted, saving costs. At the same time, the size of the lower flange assembly 10 can be adjusted according to different products, and the application range is wide.

[0050] The lower flange assembly 10 includes 4 sector-shaped lower flange assembly units 13. All the lower flange assembly units 13 are detachably connected end to end to form a complete ring. The detachable connection method is convenient for the manufacture, transportation, and assembly of the lower flange assembly 10. In this embodiment, the adjacent lower flange assembly units 13 are positioned by pins and fixedly connected by bolts.

[0051] The lower flange assembly unit 13 includes an upper plate surface 14 and a lower plate surface 15. Radial stiffeners 16 and circumferential stiffeners 17 are welded between the upper plate surface 14 and the lower plate surface 15. The upper plate surface 14 and the lower plate surface 15 are fixedly connected together through the radial stiffeners 16 and the circumferential stiffeners 17. The number of the radial stiffeners 16 is multiple, and two of them are located at both ends of the lower flange assembly unit 13, facilitating connection with other lower flange assembly units 13. All the radial stiffeners 16 are arranged along the radial direction of the lower flange assembly unit 13. Each radial stiffener 16 forms a radially extending I-shaped steel structure with the upper plate surface 14 and the lower plate surface 15, which is used to resist the external load of radial bending. The circumferential stiffeners 17 are arranged along the circumferential direction of the lower flange assembly unit 13 and are located at the middle position of the lower flange assembly unit 13. The circumferential stiffeners 17 form a circumferentially extending I-shaped steel structure with the upper plate surface 14 and the lower plate surface 15, which is used to resist the external load of overall bending. Thus, the whole lower flange assembly 10 has extremely high rigidity and strong anti-interference ability.

[0052] In this embodiment, all the radial stiffeners 16 and the circumferential stiffeners 17 within the same lower flange assembly unit 13 are fixedly connected. Specifically, all the radial stiffeners 16 and the circumferential stiffeners 17 within the same lower flange assembly unit 13 are integrally formed.

[0053] Two lower positioning holes 12 perpendicular to the lower constraint surface 11 are provided on all the lower flange assembly units 13, so that the lower flange assembly 10 forms two groups of lower positioning holes 12. The same group of lower positioning holes 12 is located on the same circle, and the central axis of the circle where each group of lower positioning holes 12 is located coincides with the central axis of the lower flange assembly 10. In other embodiments of the present invention, the number of the lower positioning holes 12 can also be 1 group, 3 groups, 4 groups, etc.; the number of the lower flange assembly units 13 can also be 2, 3, 5, etc., as long as the number of each group of lower positioning holes 12 is 4.

[0054] In order to improve the support stability of the lower flange assembly 10, in this embodiment, a support 18 is correspondingly connected at the connection of adjacent lower flange assembly units 13, and the lower positioning holes 12 also correspond to the support 18.

[0055] Please refer to Figure 9 , the upper flange assembly 20 is integrally annular. If there are defects such as depressions and scratches on the upper constraint surface 21 that affect the flatness, the upper constraint surface 21 can be reprocessed and adjusted, saving costs. At the same time, the size of the upper flange assembly 20 can also be adjusted according to different products, and the application range is wide.

[0056] The upper flange assembly 20 includes 4 fan-shaped upper flange assembly units 23. All the upper flange assembly units 23 are detachably connected end to end to form a complete ring. The detachable connection method facilitates the manufacture, transportation, and assembly of the upper flange assembly 20. In this embodiment, adjacent upper flange assembly units 23 are positioned by pins and fixedly connected by bolts.

[0057] Two upper positioning holes 22 are provided on all the upper flange assembly units 23, so that the upper flange assembly 20 forms two groups of upper positioning holes 22. The upper positioning holes 22 in the same group are located on the same circle, and the central axis of the circle where each group of upper positioning holes 22 is located coincides with the central axis of the upper flange assembly 20. In this embodiment, the upper positioning holes 22 correspond to the lower positioning holes 12 one by one.

[0058] In order to ensure the coaxiality between the upper positioning holes 22 and the column 31, in this embodiment, wear-resistant sleeves 24 are provided in the upper positioning holes 22.

[0059] Please refer to Figures 10 to 12 , the column assembly 30 includes a column 31, a positioning seat 32, a positioning rod 33, a centering sleeve 34, and a height adjustment component 35. The centering sleeve 34 and the height adjustment component 35 are sleeved on the column 31 from top to bottom in sequence. The top and bottom ends of the centering sleeve 34 are respectively connected to the upper flange assembly 20 and the height adjustment component 35, and the height adjustment component 35 contacts the positioning seat 32.

[0060] The positioning seat 32 is in an overall tower shape, and its top surface is parallel to the bottom surface. The positioning seat 32 is provided with a through hole in the vertical direction, and the through hole corresponds to the lower positioning hole 12. The top end of the positioning rod 33 extends into the bottom end of the through hole of the positioning seat 32 and is fixedly connected to the positioning seat 32. The bottom end of the positioning rod 33 extends into the top end of the lower positioning hole 12 and can slide in the lower positioning hole 12. The diameter of the positioning rod 33 is the same as the diameters of the lower positioning hole 12 and the through hole, so that the through hole and the lower positioning hole 12 have high coaxiality. The column 31 extends into the top end of the through hole of the positioning seat 32, and the diameter of the column 31 is the same as the diameter of the through hole, so that the column 31 and the through hole have high coaxiality, and thus the column 31 and the lower positioning hole 12 have high coaxiality, that is, the column 31 and the lower constraint surface 11 have high perpendicularity.

[0061] In this embodiment, the positioning seat 32 is positioned with the upper plate surface 14 by pins and fixedly connected to the upper plate surface 14 by bolts; the positioning seat 32 is welded to the positioning rod 33 and the column 31 respectively.

[0062] In order to position the positioning rod 33 and the column 31, in this embodiment, steps are provided at both ends of the through hole of the positioning seat 32. The positioning rod 33 and the column 31 are respectively in contact with the two steps. The existence of the steps ensures that the positioning rod 33 and the column 31 have a high coaxiality with the through hole of the positioning seat 32.

[0063] The column 31 of the present invention is positioned by the positioning rod 33 and the positioning seat 32. Only by inserting the positioning rod 33 into the lower positioning hole 12 can the coaxiality between the column 31 and the lower positioning hole 12 be determined, so that the column 31 has a higher perpendicularity with the lower constraint surface 11, and no additional adjustment is required. Compared with the existing method of directly fixing the column with bolts and pins, the accuracy is higher and the installation is more convenient.

[0064] Please refer to Figure 12 , the centering sleeve 34 includes an upper positioning ring 341, a connecting ring 342 and a lower positioning ring 343. The inner side walls of the upper positioning ring 341, the connecting ring 342 and the lower positioning ring 343 are flush, and the inner diameters of the upper positioning ring 341, the connecting ring 342 and the lower positioning ring 343 are the same as the outer diameter of the column 31. The outer side walls of the upper positioning ring 341 and the lower positioning ring 343 are flush, and the outer diameters of the upper positioning ring 341 and the lower positioning ring 343 are the same as the inner diameter of the wear-resistant sleeve 24. The thickness of the connecting ring 342 is greater than the thicknesses of the upper positioning ring 341 and the lower positioning ring 343. In this embodiment, the upper positioning ring 341, the connecting ring 342 and the lower positioning ring 343 are integrally formed.

[0065] The upper positioning ring 341 extends into the corresponding wear-resistant sleeve 24 and its inner and outer walls are respectively in contact with the column 31 and the wear-resistant sleeve 24. The lower positioning ring 343 is connected to the height adjustment component 35. Since the contact area between the wear-resistant sleeve 24 and the centering sleeve 34 is small and the frictional force is small, and the gap between the hole wall of the wear-resistant sleeve 24 and the column 31 is large, it is convenient for the upper flange assembly 20 to move on the column 31 after being separated from the centering sleeve 34, thus taking into account both the coaxiality accuracy and the convenience of movement.

[0066] In order to facilitate the assembly of the centering sleeve 34, in this embodiment, guiding inclined surfaces 344 are provided on the outer side walls of the upper positioning ring 341 and the lower positioning ring 343.

[0067] Please refer to Figures 13 to 16 , the height adjustment component 35 includes an axial positioning sleeve 36 and at least one heightening component 40. The number of heightening components 40 is determined by the height to be heightened. Obviously, in other embodiments of the present invention, the number of heightening components 40 can also be 0. The axial positioning sleeve 36 and all heightening components 40 are sleeved on the column 31 in sequence from bottom to top, and the bottom surface of the axial positioning sleeve 36 is in contact with the top surface of the positioning seat 32.

[0068] The raising assembly 40 includes a first sector ring 41 and a second sector ring 42, which are connected end to end to form a ring for embracing and fixing on the column 31. The two sides of the first sector ring 41 are flush with the two sides of the second sector ring 42, thereby improving the uniformity of force on the first sector ring 41 and the second sector ring 42, improving the raising accuracy, and avoiding damage to the connection between the first sector ring 41 and the second sector ring 42. The raising assembly 40 of this embodiment is a clamp type. After it is unfolded, it can be fixed to the column 31 from the outside of the column 31. Therefore, the upper flange assembly 20 only needs to be lifted a small height to complete the raising operation. The entire raising process is simple to operate, saving time and effort.

[0069] One end of the first sector ring 41 is engaged with one end of the second sector ring 42 by a mortise and tenon joint and is rotatably connected via a connecting shaft 43. The other end of the first sector ring 41 is detachably connected to the other end of the second sector ring 42 via a connecting assembly. During the raising operation, the first and second sector rings 41 and 42 are opened at the connecting assembly, then sleeved onto the column 31, and finally connected together via the connecting assembly.

[0070] The connection assembly includes a wrench 44, a positioning block 45, a torsion spring 46, and a clamping block 47. The first sector ring 41 has two slots on either side, each of which houses a positioning block 45. The positioning blocks 45 are fixed to the first sector ring 41 via bolts. To avoid interference with the shim operation, the positioning blocks 45 are flush with or lower than the side surfaces of the first sector ring 41.

[0071] A rotating shaft 48 is provided between the two positioning blocks 45. One side of the wrench 44 and a torsion spring 46 are mounted on the rotating shaft 48. One end of the torsion spring 46 is connected to the wrench 44, while the other end of the torsion spring 46 is intercepted by the first sector ring 41. After the wrench 44 is rotated, it can be reset under the elastic force of the torsion spring 46. A hook 49 is provided on the side of the wrench 44 connected to the rotating shaft 48. A clamping block 47 is provided on the second sector ring 42. The cross-sections of the hook 49 and the clamping block 47 are both right-angled triangles. One right-angled surface of the clamping block 47 is connected to the second sector ring 42, and one right-angled surface of the hook 49 is connected to the wrench 44. The other right-angled surface of the clamping block 47 cooperates with another right-angled surface of the hook 49, thereby placing the padding assembly 40 in a closed state.

[0072] The bottom-most raising component 40 contacts the top surface of the axial positioning sleeve 36 , and the lower positioning ring 343 extends into the top-most raising component 40 .

[0073] The height adjustment assembly 35 consists of an axially positioned sleeve 36 sleeved on the column 31 and multiple clamping type heightening assemblies 40. When it is necessary to adjust the height of the upper flange assembly 20, it only needs to raise the upper flange assembly 20 by a small distance and sleeve the heightening assembly 40 on the column 31 from the side. There is no need to completely lift the upper flange assembly 20 off the column 31. The entire heightening process is simple, fast, time-saving and labor-saving.

[0074] The height adjustment assembly 35 may also only include the axially positioned sleeve 36 sleeved on the column 31. By adjusting the length or quantity of the axially positioned sleeve 36, the height of the upper flange assembly 20 can be adjusted, thereby adjusting the distance between the upper constraint surface 21 and the lower constraint surface 11 to adapt to the assembly of large-diameter thin-walled cylindrical parts with different lengths.

[0075] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A four-axis positioning vertical riveting frame, characterized in that: include: A lower flange assembly (10), an upper flange assembly (20) and a column assembly (30); the upper flange assembly (20) is arranged parallel to the upper portion of the lower flange assembly (10); the top surface of the lower flange assembly (10) and the bottom surface of the upper flange assembly (20) are respectively a lower constraint surface (11) and an upper constraint surface (21); the lower constraint surface (11) and the upper constraint surface (21) are respectively used to connect with the circular steel frames at both ends of the large-diameter thin-walled cylindrical member; four groups of column assemblies (30) are provided on the top of the lower flange assembly (10) along the circumferential direction, all of the column assemblies (30) are connected to the upper flange assembly (20), and the column assemblies (30) are used to support the upper flange assembly (20) and adjust the height of the upper flange assembly (20); The lower flange assembly (10) and the upper flange assembly (20) are respectively provided with a lower positioning hole (12) and an upper positioning hole (22) corresponding to the column assembly (30); the column assembly (30) comprises a column (31), a positioning seat (32), a positioning rod (33), a positioning sleeve (34) and a height adjustment assembly (35); the positioning seat (32) is fixedly arranged on the lower constraint surface (11), and the top and bottom ends of the positioning seat (32) are respectively connected to the column (31). and the positioning rod (33), the bottom end of the column (31) extends into the corresponding lower positioning hole (12), and the column (31) passes through the corresponding upper positioning hole (22); the positioning sleeve (34) and the height adjustment component (35) are sleeved on the column (31) from top to bottom, the top and bottom ends of the positioning sleeve (34) are respectively connected to the upper flange assembly (20) and the height adjustment component (35), and the height adjustment component (35) is in contact with the positioning seat (32); The positioning sleeve (34) includes an upper positioning ring (341), a connecting ring (342) and a lower positioning ring (343) connected in sequence; the inner diameters of the upper positioning ring (341), the connecting ring (342) and the lower positioning ring (343) are consistent with the diameter of the column (31); the upper positioning ring (341) extends into the upper positioning hole (22), and the lower positioning ring (343) extends into the height adjustment component (35); The height adjustment assembly (35) comprises an axial positioning sleeve (36) and at least one heightening assembly (40) which are sequentially sleeved on the column (31) from bottom to top, wherein the bottom end of the axial positioning sleeve (36) contacts the top end of the positioning seat (32), and the lower positioning ring (343) extends into the inner side of the top of the heightening assembly (40) located at the top.

2. The four-axis positioning vertical riveting frame according to claim 1 is characterized in that: The cushioning assembly (40) comprises a first sector ring (41) and a second sector ring (42), wherein the first sector ring (41) and the second sector ring (42) are connected end to end to form a ring, and the two sides of the first sector ring (41) are flush with the two sides of the second sector ring (42); one end of the first sector ring (41) is rotatably connected to one end of the second sector ring (42) via a connecting shaft (43), and the other end of the first sector ring (41) is detachably connected to the other end of the second sector ring (42) via a connecting assembly.

3. The four-axis positioning vertical riveting frame according to claim 2 is characterized in that: The connecting assembly includes a wrench (44), a positioning block (45), a torsion spring (46) and a clamping block (47); the first sector ring (41) is provided with two positioning blocks (45) opposite to each other, a rotating shaft (48) is provided between the two positioning blocks (45), the positioning block (45) and the torsion spring (46) are both sleeved on the rotating shaft (48), one end of the torsion spring (46) is connected to the positioning block (45), and the other end of the torsion spring (46) is connected to the first sector ring (41); a clamping hook (49) is provided on the positioning block (45), and the clamping block (47) is provided on the second sector ring (42) and connected to the clamping hook (49).

4. The four-axis positioning vertical riveting frame according to any one of claims 1 to 3, characterized in that: The lower flange assembly (10) is annular and includes a plurality of fan-shaped lower flange assembly units (13). All the lower flange assembly units (13) are detachably connected at the head and tail to form an annular shape. The lower flange assembly unit (13) includes an upper plate surface (14) and a lower plate surface (15). Radial reinforcement ribs (16) and circumferential reinforcement ribs (17) are provided between the upper plate surface (14) and the lower plate surface (15). The upper plate surface (14), the lower plate surface (15) and the radial reinforcement ribs (16) form an I-beam structure extending radially, and the upper plate surface (14), the lower plate surface (15) and the circumferential reinforcement ribs (17) form an I-beam structure extending in the circumferential direction.

5. The four-axis positioning vertical riveting jig according to claim 4 is characterized in that: A plurality of supports (18) are provided at the bottom of the lower flange assembly (10), the connections between adjacent lower flange assembly units (13) correspond to the supports (18), and the lower positioning holes (12) correspond to the supports (18).

6. The four-axis positioning vertical riveting jig according to claim 5, characterized in that: The upper flange assembly (20) is annular and comprises a plurality of fan-shaped upper flange assembly units (23). A wear-resistant sleeve (24) is provided in the upper positioning hole (22).

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