Anti-deformation circle-returning splicing device

Abstract

The utility model relates to an anti-deformation rounding splicing device which comprises a first size control unit, a second size control unit, a base unit, a supporting unit, a shaping unit and a driving unit. The section of the inner contour of the first size control unit is circular, and the radius of the inner contour of the first size control unit is adjustable; the section of the inner contour of the second size control unit is circular, and the second size control unit is slidably connected with the adjacent first size control unit; the base unit is located in the first size control unit; the supporting unit is arranged around the base unit and stretches out and draws back in the axial direction. The shaping unit is arranged at the end, away from the base unit, of the supporting unit. The driving unit is connected with the supporting unit and used for driving the supporting unit to stretch out and draw back in the axial direction. The device has the advantages that by arranging the first size control unit and the second size control unit which are adjustable in size, the problem that an existing circle supporting device cannot control the radius of a cylindrical container is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rolled plate circular splicing, in particular to a deformation-proof circular splicing device. Background Art

[0002] At present, pipes and cylindrical containers are made by rolling them into a circle with a plate rolling machine, welding them, and then forming them by returning them to the circle. This method is still prone to deformation of the cylinder during splicing, and a lot of manual work is required for trimming in the later stage, which increases production costs.

[0003] Existing circle-supporting devices are mostly arranged inside cylindrical containers, and apply outward tension to the cylindrical container. However, the radius of the cylindrical container cannot be controlled and adjusted, which increases the workload of subsequent adjustments.

[0004] Currently, no effective solution has been proposed for the problem that the existing round-supporting devices in the relevant technology cannot control the radius of the cylindrical container. Utility Model Content

[0005] The utility model aims to provide a deformation-resistant circular splicing device in view of the deficiencies in the prior art, so as to solve the problems that the existing circular support device in the related art cannot control the radius size of the cylindrical container.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A deformation-resistant circular splicing device, comprising:

[0008] A first size control unit, wherein the inner contour cross-section of the first size control unit is circular, and the radius of the inner contour of the first size control unit is adjustable, so as to avoid deformation of the cylindrical workpiece and control the arc accuracy of the cylindrical workpiece;

[0009] A second size control unit, wherein the inner contour cross-section of the second size control unit is circular and is arranged alternately with the first size control unit, and the second size control unit is slidably connected to the adjacent first size control unit;

[0010] A base unit, the base unit is located inside the first size control unit and inside the cylindrical workpiece, the cross section of the base unit is a regular polygon, and the center of the base unit is arranged to coincide with the center of the first size control unit;

[0011] A support unit, the support unit is arranged around the base unit, the support unit is telescopic in the axial direction, and is used to support the cylindrical workpiece;

[0012] A shaping unit, the shaping unit is arranged at the end of the supporting unit away from the base unit and is detachably connected to the supporting unit, the outer side of the shaping unit abuts against the inner side wall of the cylindrical workpiece, and is used to round the cylindrical workpiece;

[0013] A driving unit is connected to the supporting unit and is used to drive the supporting unit to extend and retract in an axial direction.

[0014] In some embodiments, the first size control unit includes:

[0015] A plurality of first size control elements, wherein the inner contour cross-sections of the plurality of first size control elements are arc-shaped, and the plurality of first size control elements form a circle;

[0016] A plurality of first sliding elements, wherein the plurality of first sliding elements are disposed on corresponding first size control elements and are slidably connected to the second size control units respectively;

[0017] A plurality of first locking elements, wherein the plurality of first locking elements are distributed and arranged on corresponding first size control elements;

[0018] A plurality of second locking elements are respectively connected with the corresponding first locking elements and the second size control unit, and are used to lock the relative positions of the plurality of first size control elements and the second size control unit.

[0019] In some embodiments, the second size control unit includes:

[0020] A plurality of second size control elements, wherein the inner contour cross-sections of the plurality of second size control elements are arc-shaped, the plurality of second size control elements are staggered with the first size control unit, and are respectively slidably connected with adjacent first size control elements;

[0021] A plurality of second sliding elements are arranged on corresponding second size control elements and are slidably connected to the first size control unit respectively.

[0022] In some of these embodiments, the base unit comprises:

[0023] A first base element, the first base element is located inside the first size control unit and inside the cylindrical workpiece, the cross section of the first base element is a regular polygon, and the center of the first base element is arranged to coincide with the center of the first size control unit;

[0024] A plurality of first installation elements are arranged around the first base element and are respectively connected to the supporting units.

[0025] Furthermore, in some embodiments, the base unit further comprises:

[0026] A second base element, wherein the second base element is arranged at the outer side of the first base element, the center of the second base element coincides with the center of the first base element, and is used to support the supporting unit.

[0027] In some embodiments, the support unit comprises:

[0028] A plurality of supporting elements, which are arranged around the base unit and are respectively connected to the base unit and the driving unit, and the supporting elements are retracted in the axial direction to support the cylindrical workpiece under the action of the driving unit;

[0029] A plurality of second mounting elements are arranged at the outer ends of the corresponding supporting elements and are respectively detachably connected to the shaping units.

[0030] In some embodiments, the shaping unit includes:

[0031] A plurality of shaping elements, wherein the plurality of shaping elements are arranged at the end of the support unit away from the base unit, and the outer sides of the shaping elements abut against the inner side walls of the cylindrical workpiece to round the cylindrical workpiece;

[0032] A plurality of third mounting elements are arranged on corresponding shaping elements and are respectively detachably connected to the supporting units.

[0033] In some embodiments, the driving unit includes:

[0034] A driving element is connected to the supporting unit and is used to drive the supporting unit to extend and retract along an axial direction.

[0035] In some of the embodiments, it also includes:

[0036] A limiting unit is arranged on the base unit and is limitedly connected to the support unit to prevent the support unit from lateral displacement due to stress.

[0037] In some embodiments, the limiting unit includes:

[0038] A plurality of limiting elements, which are distributed on the base unit and are used to prevent the supporting unit from lateral displacement due to stress;

[0039] A plurality of connecting elements are arranged on the corresponding limiting elements and are respectively connected to the supporting units.

[0040] The utility model adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0041] The utility model discloses a deformation-resistant circular splicing device, which arranges a first size control unit and a second size control unit with adjustable sizes on the outer side of a supporting unit. When the supporting unit supports the cylindrical container in a circle, the expansion size of the cylindrical container can be controlled, thereby solving the problem that the existing supporting device cannot control the radius size of the cylindrical container. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 1 is a schematic diagram of a circular splicing device according to an embodiment of the utility model;

[0043] Figure 2 is a schematic diagram of a first size control unit according to an embodiment of the utility model;

[0044] Figure 3 is a schematic diagram of a second size control unit according to an embodiment of the utility model;

[0045] Figure 4 is a schematic diagram of a base unit according to an embodiment of the utility model;

[0046] Figure 5 is a schematic diagram of a support unit according to an embodiment of the utility model;

[0047] Figure 6 is a schematic diagram of a shaping unit according to an embodiment of the utility model;

[0048] Figure 7 is a schematic diagram of a drive unit according to an embodiment of the utility model;

[0049] Figure 8 2 is a schematic diagram of a circular splicing device according to an embodiment of the utility model;

[0050] Fig. 9 It is a schematic diagram of a limiting unit according to an embodiment of the utility model.

[0051] The reference numerals are: 10, first size control unit; 11, first size control element; 12, first sliding element; 13, first locking element; 14, second locking element;

[0052] 20. A second size control unit; 21. A second size control element; 22. A second sliding element;

[0053] 30. Base unit; 31. First base element; 32. First mounting element; 33. Second base element;

[0054] 40. Support unit; 41. Support element; 42. Second mounting element;

[0055] 50. Shaping unit; 51. Shaping element; 52. Third mounting element;

[0056] 60. driving unit; 61. driving element;

[0057] 70. Limiting unit; 71. Limiting element; 72. Connecting element. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0060] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0061] Example 1

[0062] An illustrative embodiment of the present utility model is as follows: Figure 1As shown, a deformation-resistant circular splicing device includes a first size control unit 10, a second size control unit 20, a base unit 30, a support unit 40, a shaping unit 50 and a driving unit 60. Among them, the inner contour cross-section of the first size control unit 10 is circular, and the radius of the inner contour of the first size control unit 10 is adjustable, which is used to avoid deformation of the cylindrical workpiece and control the arc accuracy of the cylindrical workpiece; the inner contour cross-section of the second size control unit 20 is circular, and is staggered with the first size control unit 10, and the second size control unit 20 is slidably connected to the adjacent first size control unit 10; the base unit 30 is located inside the first size control unit 10 and inside the cylindrical workpiece, the cross-section of the base unit 30 is a regular polygon, and the center of the base unit 30 is coincident with the center of the first size control unit 10; the support unit 40 is arranged around the base unit 30, and the support unit 40 is telescopic in the axial direction to support the cylindrical workpiece; the shaping unit 50 is arranged at the end of the support unit 40 away from the base unit 30, and is detachably connected to the support unit 40, the outer side of the shaping unit 50 is against the inner wall of the cylindrical workpiece, which is used to round the cylindrical workpiece; the driving unit 60 is connected to the support unit 40, and is used to drive the support unit 40 to telescopic in the axial direction.

[0063] like Figure 2 As shown, the first size control unit 10 includes a plurality of first size control elements 11, a plurality of first sliding elements 12, a plurality of first locking elements 13 and a plurality of second locking elements 14. The inner contour cross-sections of the plurality of first size control elements 11 are arc-shaped, and the plurality of first size control elements 11 form a circle; the plurality of first sliding elements 12 are arranged on the corresponding first size control elements 11, and are respectively slidably connected with the second size control unit 20; the plurality of first locking elements 13 are distributed on the corresponding first size control elements 11; the plurality of second locking elements 14 are respectively connected with the corresponding first locking elements 13 and the second size control unit 20, and are used to lock the relative positions of the plurality of first size control elements 11 and the second size control unit 20.

[0064] The number of the first size control elements 11 is at least 4 and is an even number.

[0065] In some embodiments, the number of the first size control elements 11 is 6.

[0066] The arc length of the first size control element 11 is smaller than the radius of a circle formed by a plurality of first size control elements 11 .

[0067] In some embodiments, the arc length of the first size control element 11 is equal to 1 / 2n of the circumference of the enclosed circle, where n is the number of the first size control elements 11 .

[0068] In some embodiments, the first size control element 11 is a first arc-shaped positioning plate.

[0069] The first sliding element 12 is disposed through the end of the first size control element 11. Generally, the first sliding element 12 is disposed through both ends of the first size control element 11.

[0070] In some embodiments, the first sliding element 12 is also disposed through the inner end of the first size control element 11. The inner end refers to the end of the first size control element 11 close to the center of the first size control unit 10.

[0071] The size of the first sliding element 12 matches the size of the first size control element 11. Generally, the arc length of the first sliding element 12 is equal to the arc length of the first size control element 11.

[0072] In some embodiments, the first sliding element 12 is a T-shaped sliding groove or a C-shaped sliding groove.

[0073] The first locking element 13 is disposed through the end of the first size control element 11 and is communicated with the first sliding element 12. Generally, the first locking element 13 is disposed through the top end and / or the bottom end of the first size control element 11.

[0074] The number of the first locking elements 13 matches the number of the first size control elements 11. Generally, the number of the first locking elements 13 is an even multiple of the number of the first size control elements 11. That is, each first size control element 11 is provided with at least two first locking elements 13, and at least one first locking element 13 is respectively provided at both ends of the first size control element 11.

[0075] When a plurality of first locking elements 13 (more than four) are provided on each first size control element 11 , the plurality of first locking elements 13 are arranged at intervals along the arc length direction of the first size control element 11 .

[0076] In some of the embodiments, the first locking element 13 is a locking hole.

[0077] The number of the second locking elements 14 matches the number of the first size control elements 11. Generally, the number of the second locking elements 14 is twice the number of the first size control elements 11.

[0078] The number of the second locking elements 14 matches the number of the first locking elements 13. Generally, the number of the second locking elements 14 is not greater than the number of the first locking elements 13. Specifically:

[0079] 1) When two first locking elements 13 are provided for each first size control element 11, the number of the second locking elements 14 is equal to the number of the first locking elements 13;

[0080] 2) When a plurality of first locking elements 13 (more than four) are provided for each first size control element 11 , the number of the second locking elements 14 is smaller than the number of the first locking elements 13 .

[0081] In some of the embodiments, the second locking element 14 is a locking bolt set.

[0082] like Figure 3 As shown, the second size control unit 20 includes a plurality of second size control elements 21 and a plurality of second sliding elements 22. The inner contour cross-sections of the plurality of second size control elements 21 are arc-shaped, the plurality of second size control elements 21 are staggered with the first size control unit 10, and are respectively slidably connected with the adjacent first size control units 10; the plurality of second sliding elements 22 are arranged on the corresponding second size control elements 21, and are respectively slidably connected with the first size control unit 10.

[0083] Specifically, a plurality of second size control elements 21 are alternately arranged with a plurality of first size control elements 11 ; the second sliding elements 22 are slidably connected with adjacent first size control elements 11 , and abut against corresponding second locking elements 14 .

[0084] The staggered arrangement of the plurality of second size control elements 21 and the plurality of first size control elements 11 means that a second size control element 21 is arranged between two adjacent first size control elements 11 , and a first size control element 11 is arranged between two adjacent second size control elements 21 .

[0085] The number of the second size control elements 21 matches the number of the first size control elements 11. Generally, the number of the second size control elements 21 is equal to the number of the first size control elements 11.

[0086] In some embodiments, the number of the second size control elements 21 is 6.

[0087] The arc length of the second size control element 21 is smaller than the radius of a circle formed by a plurality of second size control elements 21 .

[0088] The size of the second size control element 21 matches the size of the first size control element 11. Generally, the arc length of the second size control element 21 is not greater than the arc length of the first size control element 11.

[0089] In some of the embodiments, the second size control element 21 is a second arc-shaped positioning plate.

[0090] In some embodiments, the second sliding element 22 and the second size control element 21 are integrally formed.

[0091] The number of the second sliding elements 22 matches the number of the second size control elements 21. Generally, the number of the second sliding elements 22 is twice the number of the second size control elements 21. That is, each second size control element 21 corresponds to two second sliding elements 22, and the two second sliding elements 22 are symmetrically arranged at both ends of the second size control element 21.

[0092] The size of the second sliding element 22 matches the size of the first size control element 11. Generally, the arc length of the second sliding element 22 is less than 1 / 2 of the arc length of the first size control element 11.

[0093] The size of the second sliding element 22 matches the size of the first sliding element 12. Generally, the radial dimension of the cross section of the second sliding element 22 is not greater than the radial dimension of the cross section of the first sliding element 12.

[0094] In some embodiments, the second sliding element 22 is a T-shaped slide rail or a C-shaped slide rail.

[0095] Furthermore, the second size control unit 20 further includes a plurality of third locking elements, wherein the plurality of third locking elements are respectively disposed on the corresponding second sliding elements 22 and are respectively connected to the first size control unit 10 .

[0096] Specifically, the third locking element is connected to the corresponding second locking element 14 .

[0097] The number of the third locking elements matches the number of the second sliding elements 22. Generally, the number of the third locking elements is an integer multiple of the number of the second sliding elements 22. That is, each second sliding element 22 is provided with at least two third locking elements.

[0098] In the case that a plurality of third locking elements are disposed on each second sliding element 22 , the plurality of third locking elements are disposed at intervals along the arc length direction of the second sliding element 22 .

[0099] The number of the third locking elements matches the number of the second locking elements 14. Generally, the number of the third locking elements is not less than the number of the second locking elements 14. Specifically:

[0100] 1) When a third locking element is provided for each second sliding element 22, the number of the third locking elements is equal to the number of the second locking elements 14;

[0101] 2) When a plurality of third locking elements are provided on each second sliding element 22 , the number of the third locking elements is greater than the number of the second locking elements 14 .

[0102] In some embodiments, the third locking element includes but is not limited to a locking hole and a locking groove.

[0103] like Figure 4 As shown, the base unit 30 includes a first base element 31 and a plurality of first mounting elements 32. The first base element 31 is located inside the first size control unit 10 and inside the cylindrical workpiece, the cross section of the first base element 31 is a regular polygon, and the center of the first base element 31 coincides with the center of the first size control unit 10; the plurality of first mounting elements 32 are arranged around the first base element 31 and are respectively connected to the support unit 40.

[0104] Specifically, the first base element 31 is located in the middle of a range enclosed by the first size control elements 11 , and the center of the first base element 31 coincides with the center of a circle enclosed by the first size control elements 11 .

[0105] The size of the first base element 31 matches the size of the first size control element 11. Generally, the radial size of the first base element 31 is smaller than the radius of a circle formed by a plurality of first size control elements 11.

[0106] The cross section of the first base element 31 is a regular polygon, including but not limited to a square, a regular pentagon, a regular hexagon, a regular octagon, and the like.

[0107] Preferably, the cross section of the first base element 31 is a regular hexagon.

[0108] In some of the embodiments, the first base element 31 is a fixed platform.

[0109] The number of the first mounting elements 32 matches the number of the sides of the first base element 31. Generally, the number of the first mounting elements 32 is equal to the number of the sides of the first base element 31. That is, one first mounting element 32 is disposed on each side of the first base element 31.

[0110] In some embodiments, the number of the first installation elements 32 is 6. The 6 first installation elements 32 are evenly arranged around the first base element 31 .

[0111] In some of these embodiments, the first mounting element 32 includes, but is not limited to, a mounting seat.

[0112] Furthermore, the base unit 30 further includes a second base element 33 , wherein the second base element 33 is disposed outside the first base element 31 , and the center of the second base element 33 coincides with the center of the first base element 31 , for supporting the support unit 40 .

[0113] The size of the second base element 33 matches the size of the first size control element 11. Generally, the radial size of the outer contour of the second base element 33 is smaller than the radius of the circle formed by the first size control elements 11.

[0114] The size of the second base element 33 matches that of the first base element 31. Generally, the radial size of the inner contour of the second base element 33 is larger than that of the first base element 31, and the thickness of the second base element 33 is smaller than that of the first base element 31.

[0115] In some of the embodiments, the second base element 33 has a circular ring shape in plan view.

[0116] In some of the embodiments, the second base element 33 includes but is not limited to a flange.

[0117] like Figure 5 As shown, the support unit 40 includes a plurality of support elements 41 and a plurality of second mounting elements 42. The plurality of support elements 41 are arranged around the base unit 30 and are respectively connected to the base unit 30 and the drive unit 60. The support elements 41 are retracted along the axial direction to support the cylindrical workpiece under the action of the drive unit 60. The plurality of second mounting elements 42 are arranged at the outer ends of the corresponding support elements 41 and are respectively detachably connected to the shaping unit 50.

[0118] Specifically, a plurality of support elements 41 are disposed around the first base element 31 , and are respectively in contact with the second base element 33 , and are respectively connected with the corresponding first mounting elements 32 .

[0119] The number of the supporting elements 41 matches the number of the first mounting elements 32. Generally, the number of the supporting elements 41 is equal to the number of the first mounting elements 32. That is, the supporting elements 41 correspond to the first mounting elements 32 one by one.

[0120] In some embodiments, the number of the supporting elements 41 is 6.

[0121] The size of the support element 41 matches the size of the first size control element 11. Generally, the axial size of the support element 41 is smaller than the radius of a circle formed by a plurality of first size control elements 11.

[0122] In some of the embodiments, the support element 41 is a hydraulic rod.

[0123] In some of the embodiments, the second mounting element 42 and the supporting element 41 are formed integrally.

[0124] The number of the second installation elements 42 matches the number of the support elements 41. Generally, the number of the second installation elements 42 is equal to the number of the support elements 41. That is, the second installation elements 42 correspond to the support elements 41 one by one.

[0125] In some of the embodiments, the second mounting element 42 includes, but is not limited to, a threaded mounting post or the like.

[0126] like Figure 6 As shown, the shaping unit 50 includes a plurality of shaping elements 51 and a plurality of third mounting elements 52. The plurality of shaping elements 51 are disposed at the end of the support unit 40 away from the base unit 30, and the outer side of the shaping element 51 abuts against the inner side wall of the cylindrical workpiece to round the cylindrical workpiece; the plurality of third mounting elements 52 are disposed at the corresponding shaping elements 51 and are detachably connected to the support unit 40 respectively.

[0127] Specifically, a plurality of shaping elements 51 are disposed at ends of the corresponding supporting elements 41 away from the first base element 31 ; and a plurality of third mounting elements 52 are detachably connected to the corresponding second mounting elements 42 .

[0128] The number of shaping elements 51 matches the number of supporting elements 41. Generally, the number of shaping elements 51 is equal to the number of supporting elements 41. That is, the shaping elements 51 correspond to the supporting elements 41 one by one.

[0129] In some of the embodiments, the number of shaping elements 51 is 6.

[0130] The size of the shaping element 51 matches the size of the first size control element 11. Generally, the arc length of the shaping element 51 is less than 1 / m of the circumference of the circle corresponding to the first size control element 11, where m is the number of the shaping elements 51.

[0131] In some of the embodiments, the shaping element 51 is a circular support template.

[0132] In some of the embodiments, the connection method between the third installation element 52 and the shaping element 51 includes but is not limited to screw connection and integral molding.

[0133] The number of the third mounting elements 52 matches the number of the second mounting elements 42. Generally, the number of the third mounting elements 52 is equal to the number of the second mounting elements 42, that is, the third mounting elements 52 correspond to the second mounting elements 42 one by one.

[0134] In some of the embodiments, the third mounting element 52 includes, but is not limited to, a threaded mounting hole.

[0135] like Figure 7As shown, the driving unit 60 includes a driving element 61. The driving element 61 is connected to the supporting unit 40 and is used to drive the supporting unit 40 to extend and retract along the axial direction.

[0136] Specifically, the driving elements 61 are connected to a plurality of supporting elements 41 respectively.

[0137] In some of the embodiments, the driving element 61 is a hydraulic cylinder.

[0138] The method of using the utility model is as follows:

[0139] 1. Determine the size of the circle enclosed by the first size control element 11 and the second size control element 21 according to the outer diameter of the cylindrical workpiece to be processed, and fix the first size control element 11 and the second size control element 21 by the locking element 23;

[0140] 2. Fix the two cylindrical workpieces to be welded and complete the pre-assembly work on the horizontal plane to align the girth welding joints as much as possible;

[0141] 3. Place the first base element 31, the support element 41, and the shaping element 51 into the interior of the cylindrical workpiece to be processed, and adjust the first base element 31 so that its center is aligned with the center line of the cylindrical workpiece;

[0142] 4. Open the driving element 61, and the fluid path is reversed to increase the pressure in the rodless cavity of the supporting element 41, driving the supporting element 41 to extend until the shaping element 51 hits the inner wall of the cylindrical workpiece, so that the cylindrical workpiece is gradually rounded by force;

[0143] 5. After the cylinder workpiece to be welded is fully rounded, use a welding machine to spot weld the circumferential weld to fix it;

[0144] 6. After the spot welding and fixing work is completed, pressure oil is input into the support element 41 to make the piston return, and the support element 41 shrinks along the original path to separate the shaping element 51 from the inner wall of the cylinder workpiece, and then the circular splicing device is taken out.

[0145] The advantage of the utility model lies in that by arranging a first size control unit and a second size control unit with adjustable sizes on the outer side of the supporting unit, the expansion size of the cylindrical container can be controlled while the supporting unit is rounding the cylindrical container, thereby solving the problem that the existing rounding device cannot control the radius size of the cylindrical container.

[0146] Example 2

[0147] This embodiment is a supplementary embodiment of Embodiment 1.

[0148] like Figure 8As shown, the circular splicing device further includes a limiting unit 70. The limiting unit 70 is disposed on the base unit 30 and is limitedly connected to the support unit 40 to prevent the support unit 40 from being displaced due to stress.

[0149] like Fig. 9 As shown, the limiting unit 70 includes a plurality of limiting elements 71 and a plurality of connecting elements 72. The plurality of limiting elements 71 are distributed on the base unit 30 to prevent the support unit 40 from being displaced due to stress; and the plurality of connecting elements 72 are disposed on the corresponding limiting elements 71 and are connected to the support unit 40 respectively.

[0150] Specifically, a plurality of limiting elements 71 are distributed on the second base element 33 ; and a plurality of connecting elements 72 are respectively connected to corresponding supporting elements 41 .

[0151] In some of the embodiments, the limiting element 71 is connected to the second base element 33 in a manner including but not limited to welding and screw connection.

[0152] The number of the limiting elements 71 matches the number of the supporting elements 41. Generally, the number of the limiting elements 71 is equal to the number of the supporting elements 41, that is, the limiting elements 71 correspond to the supporting elements 41 one by one.

[0153] In some of the embodiments, the limiting element 71 includes but is not limited to a threaded collar.

[0154] In some of the embodiments, the connecting element 72 is disposed through the limiting element 71 .

[0155] The size of the connecting element 72 matches the size of the supporting element 41. Generally, the radial size of the connecting element 72 is not less than the radial size of the supporting element 41.

[0156] In some of the embodiments, the connecting element 72 is a limiting hole.

[0157] The advantage of the utility model is that, by providing the limiting unit, lateral displacement of the supporting unit due to axial stress during the supporting process can be avoided.

[0158] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A deformation-resistant circular splicing device, characterized in that: include: A first size control unit, wherein the inner contour cross-section of the first size control unit is circular, and the radius of the inner contour of the first size control unit is adjustable, so as to avoid deformation of the cylindrical workpiece and control the arc accuracy of the cylindrical workpiece; A second size control unit, wherein the inner contour cross-section of the second size control unit is circular and is arranged alternately with the first size control unit, and the second size control unit is slidably connected to the adjacent first size control unit; A base unit, the base unit is located inside the first size control unit and inside the cylindrical workpiece, the cross section of the base unit is a regular polygon, and the center of the base unit is arranged to coincide with the center of the first size control unit; A support unit, the support unit is arranged around the base unit, the support unit is telescopic in the axial direction, and is used to support the cylindrical workpiece; A shaping unit, the shaping unit is arranged at the end of the supporting unit away from the base unit and is detachably connected to the supporting unit, the outer side of the shaping unit abuts against the inner side wall of the cylindrical workpiece, and is used to round the cylindrical workpiece; A driving unit is connected to the supporting unit and is used to drive the supporting unit to extend and retract in an axial direction.

2. The circular splicing device according to claim 1, characterized in that: The first size control unit comprises: A plurality of first size control elements, wherein the inner contour cross-sections of the plurality of first size control elements are arc-shaped, and the plurality of first size control elements form a circle; A plurality of first sliding elements, wherein the plurality of first sliding elements are disposed on corresponding first size control elements and are slidably connected to the second size control units respectively; A plurality of first locking elements, wherein the plurality of first locking elements are distributed and arranged on corresponding first size control elements; A plurality of second locking elements are respectively connected with the corresponding first locking elements and the second size control unit, and are used to lock the relative positions of the plurality of first size control elements and the second size control unit.

3. The circular splicing device according to claim 1, characterized in that: The second size control unit comprises: A plurality of second size control elements, wherein the inner contour cross-sections of the plurality of second size control elements are arc-shaped, the plurality of second size control elements are staggered with the first size control units, and are respectively slidably connected with adjacent first size control units; A plurality of second sliding elements are arranged on corresponding second size control elements and are slidably connected to the first size control unit respectively.

4. The circular splicing device according to claim 1, characterized in that: The base unit comprises: A first base element, the first base element is located inside the first size control unit and inside the cylindrical workpiece, the cross section of the first base element is a regular polygon, and the center of the first base element is arranged to coincide with the center of the first size control unit; A plurality of first installation elements are arranged around the first base element and are respectively connected to the supporting units.

5. The circular splicing device according to claim 4, characterized in that: The base unit also includes: A second base element, wherein the second base element is arranged at the outer side of the first base element, the center of the second base element coincides with the center of the first base element, and is used to support the supporting unit.

6. The circular splicing device according to claim 1, characterized in that: The support unit comprises: A plurality of supporting elements, which are arranged around the base unit and are respectively connected to the base unit and the driving unit, and the supporting elements are retracted in the axial direction to support the cylindrical workpiece under the action of the driving unit; A plurality of second mounting elements are arranged at the outer ends of the corresponding supporting elements and are respectively detachably connected to the shaping units.

7. The circular splicing device according to claim 1, characterized in that: The shaping unit comprises: A plurality of shaping elements, wherein the plurality of shaping elements are arranged at the end of the support unit away from the base unit, and the outer sides of the shaping elements abut against the inner side walls of the cylindrical workpiece to round the cylindrical workpiece; A plurality of third mounting elements are arranged on corresponding shaping elements and are respectively detachably connected to the supporting units.

8. The circular splicing device according to claim 1, characterized in that: The driving unit comprises: A driving element is connected to the supporting unit and is used to drive the supporting unit to extend and retract along an axial direction.

9. The circular splicing device according to any one of claims 1 to 8, characterized in that: Also includes: A limiting unit is arranged on the base unit and is limitedly connected to the support unit to prevent the support unit from lateral displacement due to stress.

10. The circular splicing device according to claim 9, characterized in that: The limiting unit comprises: A plurality of limiting elements, which are distributed on the base unit and are used to prevent the supporting unit from lateral displacement due to stress; A plurality of connecting elements are arranged on the corresponding limiting elements and are respectively connected to the supporting units.

Images