A thin plate segmented turning tool

Abstract

The present invention discloses a thin plate segment turning tool, which consists of a main beam, a supporting beam and a support. The main beam and the supporting beam are both box-type structures. The main beam and the supporting beam are connected by through holes and maintained in a perpendicular state to each other. The support is placed on the site to support the main beam and the supporting beam. The thin plate segment is arranged on the main beam top plate of the main beam, and is connected and fixed to the main beam and the main beam and the support beam edges by multiple sets of lugs at its ends. Therefore, the present invention can support the thin plate segment through the main beam and the supporting beam, and provide support during the turning operation, so as to meet the needs of the cruise ship thin plate segment turning operation, ensure that the deformation of the construction product during the turning operation is controlled within the required range, and effectively reduce the number of welding of reinforcing materials.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding equipment, in particular to a thin plate segmented turning tool. Technical Background

[0002] Cruise ships, hailed as the "crown jewels" of my country's shipbuilding industry, are high-value-added, high-tech marine products. They are high-end marine tourism projects that combine aesthetics and comfort, often dubbed "mobile cities at sea." To meet passenger capacity requirements, cruise ships have significantly higher superstructure weight than other types of ships. Furthermore, to meet cruise ship weight targets and aesthetic requirements, cruise ship superstructures place high demands on lightweighting and plate thickness. During the construction of cruise ship superstructure sections, high-strength steel plates with a thickness of 5mm-6mm are typically used as structural plate, accounting for up to 90% of the superstructure plate weight. During the construction of superstructure sections, the sections are constructed using a single-layer reverse-casting method. During construction, the spacing between ribs is large, with strong structural spacing often exceeding 3 meters. This can increase the deformation of thin sections during the reversal process, compromising segment accuracy. In some cases, the large size of thin sections and their low structural strength can lead to deformation and scrapping.

[0003] During the turnaround of thin-plate sections on cruise ships, domestic and international shipyards typically pre-install longitudinal and transverse reinforcements on the sections, sometimes even forming frames before turning them over. This traditional approach not only wastes materials but also significantly increases construction time and labor costs. Excessive reinforcement welding during the turnaround operation can also cause deformation of the thin-plate sections. Summary of the Invention

[0004] The main purpose of the present invention is to provide a thin plate segment turning tool for construction products such as single-layer thin plate segments and single-layer lightweight segments in cruise ships, so as to safely carry the thin plate segments for turning operations, reduce the deformation of the segments during the turning process, and reduce the number of welding reinforcement materials.

[0005] To achieve the above-mentioned purpose, the present invention provides a thin plate segmented turning tool, which includes: a main beam, a supporting beam and at least three supports. The main beam includes a main beam top plate and a main beam bottom plate, which are arranged as a U-shaped structure of equal size and aligned vertically; between the main beam top plate and the main beam bottom plate, an inner vertical plate, an outer vertical plate and a main beam end plate are connected perpendicular to the main beam top plate and the main beam bottom plate; wherein the outer vertical plate is connected to the edges of the main beam top plate and the main beam bottom plate, and the main beam end plate is connected to the ends of the main beam top plate and the main beam bottom plate, enclosing the main beam top plate and the main beam bottom plate into a U-shaped closed box structure; the turning part of the U-shaped closed box structure is also provided with a through hole perpendicular to the main beam top plate and the main beam bottom plate, and the through hole is closed on all sides; in the U-shaped closed box structure, the outer surfaces of the main beam end plate and the outer vertical plate facing the open end are also welded with a turning main lifting lug and a turning auxiliary lifting lug. The support beam comprises a support beam top plate and a support beam bottom plate, which are arranged to be a "mouth" shaped structure of equal size and aligned on the left and right; between the support beam top plate and the support beam bottom plate, a web plate and a support beam end plate are also connected, perpendicular to the support beam top plate and the support beam bottom plate; wherein the web plate connects the edges of the support beam top plate and the support beam bottom plate, and the support beam end plate connects the ends of the support beam top plate and the support beam bottom plate, enclosing the support beam top plate and the support beam bottom plate into a closed box structure with a "mouth" shaped structure; the support beam is perpendicular to the main beam and passes through the through hole of the main beam; the outer surface of the web plate of the support beam is also provided with a stopper on the upper and lower sides of the through hole, and the stop abuts against the main beam top plate and the main beam bottom plate above and below the through hole to keep the support beam and the main beam vertically fixed; the outer surfaces of the support beam end plates respectively arranged on the upper and lower sides of the main beam on the support beam are also welded with support beam lifting ears. The thin plate segment to be turned over is placed on the main beam top plate of the main beam, and its ends are respectively connected and fixed to the main turning lugs, auxiliary turning lugs, and supporting beam lugs, so that the main beam and the supporting beams can support the thin plate segment when the thin plate segment is turned over to prevent deformation. The support is arranged below the main beam and is used to support the main beam, the supporting beams connected to it, and the thin plate segment placed thereon.

[0006] Optionally, in the above-mentioned thin plate segmented turning tool, the main beam includes two through holes, and the two through holes are oppositely arranged at two turning positions of the U-shaped closed box structure.

[0007] Optionally, in the above-mentioned thin plate segmented turning tool, partitions are welded around the through hole by deep penetration welding to close the through hole; and the welded parts are polished and smooth.

[0008] Optionally, in the above-mentioned thin plate segmented turning tooling, the interior of the main beam is also provided with: long longitudinal ribs, short longitudinal ribs, main beam transverse ribs and reinforcing flat steel to support its main beam top plate, inner vertical plate, outer vertical plate, main beam bottom plate and the inner wall of the main beam end plate.

[0009] Optionally, in the above-mentioned thin plate segmented turning tooling, the open end of the main beam is arranged in the width direction of the U-shaped closed box structure; the two sides of the open end are the long arms of the main beam top plate and the main beam bottom plate; the opposite side of the open end is the short arm of the main beam top plate and the main beam bottom plate; the long longitudinal ribs are arranged in the length direction of the U-shaped closed box structure, connecting the middle position of the long arms of the main beam top plate and the main beam bottom plate; the long longitudinal ribs are provided with lightening holes at intervals; the short longitudinal ribs are provided Parallel to the length direction of the U-shaped closed box structure, connecting the middle position of the short arm of the main beam top plate and the main beam bottom plate; the short longitudinal ribs are provided with lightening holes; the main beam transverse ribs are arranged to be parallel to the width direction of the U-shaped closed box structure, connecting the long arm of the main beam top plate and the main beam bottom plate close to one end of the opening; the main beam transverse ribs are provided with lightening holes; the reinforcing flat steel is arranged between the two through holes, connecting the middle position of the short arm of the main beam top plate and the main beam bottom plate.

[0010] Optionally, in the above-mentioned thin plate segmented turning tooling, the main beam top plate and the main beam bottom plate are flat; the long longitudinal ribs, short longitudinal ribs, main beam transverse ribs and the main beam top plate and the main beam bottom plate are connected by corner welding, and the long longitudinal ribs, short longitudinal ribs, main beam transverse ribs and the inner vertical plate and the outer vertical plate are connected by double-sided groove deep fusion welding.

[0011] Optionally, in the above-mentioned thin plate segmented turning tooling, the support includes: cross beams, including at least two, and the cross beams are connected in a "cross" shape; frames, including four, the ends of the frames are connected to each other in a square shape, and the middle positions of the frames are respectively connected to the ends of the cross beams; legs, including four, the upper ends of the four legs are respectively connected to the ends of the frames; the lower ends of the four legs are respectively connected to pads.

[0012] Optionally, in the above-mentioned thin plate segmented turning tooling, the support is a frame structure, wherein the legs, frames and beams are all spliced ​​together by profiles, and the legs, frames and beams are connected by butt welding and fillet welding.

[0013] Optionally, in the above-mentioned thin plate segmented turning tooling, the interior of the support beam is also provided with a central longitudinal rib, a support beam transverse rib and a connecting truss to support the inner wall of its support beam top plate, support beam bottom plate, web plate and support beam end plate.

[0014] Optionally, in the above-mentioned thin plate segmented turning tooling, the middle longitudinal ribs are arranged in the length direction of the support beam top plate and the support beam bottom plate, connecting the middle position of the support beam top plate and the support beam bottom plate; the support beam transverse ribs are arranged in the width direction of the support beam top plate and the support beam bottom plate, connecting the support beam top plate and the support beam bottom plate; the support beam top plate and the support beam bottom plate are connected to the middle longitudinal ribs or the support beam transverse ribs by angle welding, and the middle longitudinal ribs or the support beam transverse ribs are connected to the web and end plate by deep fusion welding; the connecting girder is a reinforced H-shaped steel, whose main body is composed of H-shaped steel and reinforced elbow plates, and is connected by angle welding.

[0015] Beneficial effects

[0016] It consists of a main beam, a supporting beam and a support. The main beam and the supporting beam are both box-type structures. The main beam and the supporting beam are connected by through holes and are kept in a perpendicular state to each other. The support is placed on the site to support the main beam and the supporting beam. The thin plate segment is arranged on the main beam top plate of the main beam, and is connected and fixed to the main beam and the plurality of groups of lugs on the edge of the supporting beam through its ends. Therefore, the present invention can support the thin plate segment through the main beam and the supporting beam, and provide support during the turning operation, so as to meet the needs of the turning operation of the cruise ship thin plate segment, ensure that the deformation of the construction product during the turning operation is controlled within the required range, and effectively reduce the number of welding of reinforcing materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic structural diagram of the main beam in the thin plate segmented turning tool of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the AA section of the central main beam structure;

[0020] Figure 3 for Figure 1 Schematic diagram of the BB section of the middle main beam structure;

[0021] Figure 4 for Figure 1 Schematic diagram of CC section of the central main beam structure;

[0022] Figure 5 for Figure 1 Schematic diagram of the DD section of the central main beam structure

[0023] Figure 6 for Figure 1 Schematic diagram of the FF section of the central main beam structure;

[0024] Figure 7 for Figure 1 Schematic diagram of the EE section of the central main beam structure;

[0025] Figure 8 This is a schematic structural diagram of the support beam in the thin plate segmented turning tool of the present invention;

[0026] Figure 9 for Figure 8 Side view of the center beam structure on plane K;

[0027] Figure 10 for Figure 8 Schematic diagram of the LL section of the central beam structure;

[0028] Figure 11 for Figure 8 Schematic diagram of the MM section of the central beam structure;

[0029] Figure 12 for Figure 8 Schematic diagram of the NN section of the central beam structure;

[0030] Figure 13 This is a schematic structural diagram of a support in the thin plate segmented turning tool of the present invention;

[0031] Figure 14 for Figure 13 Side view of the middle support structure;

[0032] Figure 15 This is a schematic diagram of the process of realizing segmented turning of a thin plate segmented turning tool of the present invention;

[0033] Figure 16 It is a schematic diagram of the connection relationship between the various structures of the thin plate segmented turning tool of the present invention when in use.

[0034] In the figure, 1 represents the main beam top plate; 2 represents the inner vertical plate; 3 represents the long longitudinal ribs; 4 represents the short longitudinal ribs; 5 represents the main beam transverse ribs; 6 represents the main beam end plates; 7 represents the reinforcing flat steel; 8 represents the main lifting lug for turning over; 9 represents the auxiliary lifting lug for turning over; 10 represents the main beam; 11 represents the web; 12 represents the middle longitudinal ribs; 13 represents the supporting beam top plate; 14 represents the supporting beam end plates; 15 represents the supporting beam transverse ribs; 16 represents the reinforcing H-shaped steel; 17 represents the supporting beam lifting lug; 18 represents the stopper; 20 represents the supporting beam; 21 represents the supporting leg; 22 represents the frame; 23 represents the crossbeam; 24 represents the pad; and 30 represents the support. DETAILED DESCRIPTION

[0035] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. The embodiments are only used to explain the invention, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art of the present invention, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be considered to fall within the scope of protection of the present invention.

[0036] The present invention provides a thin plate segment turning tool for supporting thin plates for segment turning operations, which mainly includes: a main beam 10, a supporting beam 20 and three supports 30 supporting the ... supporting the main beam 10, a supporting beam 20 and three supports supporting the main beam 10, a supporting beam

[0037] See Figures 1 to 7 The main beam structure is shown. It is configured as a U-shaped closed box structure, with its main body comprising: a main beam top plate 1 and a main beam bottom plate, which are configured as a U-shaped structure of equal size and aligned vertically. Between the main beam top plate 1 and the main beam bottom plate, an inner vertical plate 2, an outer vertical plate, and a main beam end plate 6 are connected perpendicularly to the main beam top plate 1 and the main beam bottom plate. The outer vertical plate and the inner vertical plate are respectively connected to the edges of the main beam top plate 1 and the main beam bottom plate, and the main beam end plate 6 is connected to the ends of the main beam top plate 1 and the main beam bottom plate, enclosing the main beam top plate 1 and the main beam bottom plate to form a U-shaped closed box structure. The two turning points of the U-shaped closed box structure are also provided with two through holes perpendicular to the main beam top plate 1 and the main beam bottom plate. The through holes are sealed on all sides; partitions are welded around the through holes using deep penetration welding to seal the through holes; and the welded areas are polished and smooth. The open end of the main beam 10 is positioned along the width of the U-shaped closed box structure; on either side of the open end are the long arms of the main beam top plate 1 and the main beam bottom plate; on the opposite side of the open end are the short arms of the main beam top plate 1 and the main beam bottom plate. In the U-shaped closed box structure, the main beam end plate 6 and the outer surface of the outer vertical plate facing the open end are also welded with main and auxiliary lifting lugs 8 and 9.

[0038] refer to Figure 8 The support beam 20 shown in the figure includes a support beam top plate 13 and a support beam bottom plate, which are arranged in a "mouth"-shaped structure of equal size and aligned left and right; between the support beam top plate 13 and the support beam bottom plate, a web plate 11 and a support beam end plate 14 are connected perpendicular to the support beam top plate 13 and the support beam bottom plate; wherein, the web plate 11 connects the edges of the support beam top plate 13 and the support beam bottom plate, and the support beam end plate 14 connects the ends of the support beam top plate 13 and the support beam bottom plate, enclosing the support beam top plate 13 and the support beam bottom plate into a closed box structure of a "mouth"-shaped structure; refer to Figure 16As shown in the middle part, the support beam 20 is perpendicular to the main beam 10 and passes through the through hole of the main beam 10; the outer surface of the web 11 of the support beam 20 is also provided with a stopper 18 on the upper and lower sides of the through hole, and the stopper 18 is in contact with the main beam top plate 1 and the main beam bottom plate above and below the through hole to keep the support beam 20 and the main beam 10 vertically fixed; the outer surface of the support beam end plate 14 of the support beam 20 arranged on the upper and lower sides of the main beam 10 is also welded with a support beam lifting ear 17.

[0039] Thus, the above structure can set the thin plate segment to be turned over on the main beam top plate 1 of the main beam 10, and connect and fix the ends of the thin plate segment to be turned over to the main turning lugs 8, the auxiliary turning lugs 9, and the support beam lugs 17 respectively. Figure 15 The main beam 10 and the supporting beam 20 are turned over in such a manner that they can support the thin plate segment when the thin plate segment turns over to avoid deformation thereof.

[0040] For a more specific implementation, refer to Figure 2 As shown, the interior of the main beam 10 is further provided with: an inner vertical plate 2, which is arranged in the length direction of the U-shaped closed box structure and connects the long arm of the main beam top plate 1 and the main beam bottom plate.

[0041] refer to Figure 3 As shown, the interior of the main beam 10 is also provided with: long longitudinal ribs 3, which are arranged in the length direction of the U-shaped closed box structure, connecting the middle position of the long arm of the main beam top plate 1 and the main beam bottom plate; the long longitudinal ribs 3 are provided with lightening holes at intervals.

[0042] refer to Figure 4 As shown, the main beam 10 is further provided with short longitudinal ribs 4. These are arranged parallel to the length of the U-shaped closed box structure and connect the main beam top plate 1 and the middle position of the short arm of the main beam bottom plate; the short longitudinal ribs 4 are provided with lightening holes.

[0043] refer to Figure 5 As shown, the interior of the main beam 10 is further provided with: a main beam transverse rib 5. The main beam transverse rib 5 is arranged parallel to the width direction of the U-shaped closed box structure, and the long arm connecting the main beam top plate 1 and the main beam bottom plate is close to one end of the opening; the main beam transverse rib 5 is provided with a lightening hole.

[0044] refer to Figure 6 As shown, a main lifting lug 8 for turning over is welded to the end plate 6 at the end of the main beam 10.

[0045] refer to Figure 7As shown, a reinforcing flat steel 7 is further provided between the two through holes of the main beam 10. It connects the middle position of the short arm of the main beam top plate 1 and the main beam bottom plate.

[0046] In the above structure, the main beam top plate 1 and the main beam bottom plate are flat; the long longitudinal ribs 3, short longitudinal ribs 4, and main beam transverse ribs 5 are connected to the main beam top plate 1 and the main beam bottom plate using fillet welds, and the long longitudinal ribs 3, short longitudinal ribs 4, and main beam transverse ribs 5 are connected to the inner vertical plate 2 and the outer vertical plate using double-sided groove deep penetration welding. As a result, the short longitudinal ribs 4, main beam transverse ribs 5, and reinforcing flat steel 7 are sufficient to support the inner walls of the main beam top plate 1, inner vertical plate 2, outer vertical plate, main beam bottom plate, and main beam end plate 6. Thin plate segments can be pinned to the main beam surface via lugs, providing stable support through the main beam to prevent deformation during turnover.

[0047] In a specific implementation, in the above structure, the interior of the support beam 20 is further provided with a central longitudinal rib 12, a support beam transverse rib 15 and a connecting truss to support the inner wall of the support beam top plate 13, the support beam bottom plate, the web 11 and the support beam end plate. Figure 9 As shown, the stopper 18 is set to a trapezoidal structure, and the wide side of the trapezoid abuts against the main beam top plate 1 and the main beam bottom plate above and below the through hole to fix the support beam 20.

[0048] See Figure 10 In the above-mentioned support beam 20, the middle longitudinal rib 12 is arranged in the longitudinal direction of the support beam top plate 13 and the support beam bottom plate, perpendicular to the main beam, and connected to the middle position of the support beam top plate 13 and the support beam bottom plate. It is also connected to the upper and lower ends of the support beam lugs 17 for the upper and lower ends of the thin plate segments to be pinned to them through other lug structures, so as to fix the thin plate segments in the upper and lower directions and prevent them from deformation. Figure 11 The support beam transverse ribs 15 are arranged in the width direction of the support beam top plate 13 and the support beam bottom plate, connecting the support beam top plate 13 and the support beam bottom plate. Figure 12 The end plates 14 shown are rectangular structures that close the ends of the frame structure in the support beams.

[0049] In the above structure, the support beam 20 is internally mounted with mutually perpendicular reinforced longitudinal ribs 12 and transverse ribs 15. Side beam lugs 17 and stops 18 are installed on the upper and lower sides, respectively. The support beam top plate 13 and bottom plate are flat and connected to the internal ribs by fillet welds. They are also connected to the web plate 11 and end plate 14 by deep penetration welds. The truss structure is reinforced with H-shaped steel 16. The main body is composed of H-shaped steel and reinforcing brackets, connected by fillet welds.

[0050] See Figure 13 and Figure 14The support is arranged below the main beam 10, and is used to support the main beam 10, the supporting beam 20 connected thereto, and the thin plate segment arranged thereon. The support is a frame structure, and the main body is composed of supporting legs 21 and a frame 22, all of which are spliced ​​together by profiles. A crossbeam 23 is installed in the plane of the frame 22. The bottom of the supporting legs 21 is placed on the ground through a pad 24, and all the supports are connected by butt welding and fillet welding. Among them, the crossbeam 23 includes at least two, and the crossbeams 23 are connected in a "cross" shape; the frame 22 includes four, and the ends of the frame 22 are connected to each other in a square shape, and the middle position of the frame 22 is respectively connected to the end of the crossbeam 23; the supporting legs 21 include four, and the upper ends of the four supporting legs 21 are respectively connected to the ends of the frame 22; the lower ends of the four supporting legs 21 are respectively connected to pads 24. Among them, the supporting legs 21, the frame 22 and the crossbeam 23 are all spliced ​​together by profiles.

[0051] See Figure 15 A diagram of an embodiment in actual use shows a thin plate segment turning fixture responsible for turning a thin plate segment. The thin plate segment is secured to the edges of the main beam and supporting beams of the present invention via connectors at its edges. This provides support from the main beam and supporting beams during the turning process, preventing deformation caused by surface forces on the thin plate segment. The turning process can be accomplished using a crane, which can also be connected to the thin plate segment and the fixture of the present invention via the aforementioned lifting lugs to control the turning of the thin plate segment.

[0052] For the above-mentioned operation process, each item requires detailed design and parameter calibration; the above-mentioned production details must be reflected in the production process to ensure that they can be used during the turning operation.

[0053] The above is a further detailed description of the present invention in combination with a specific preferred embodiment. The present invention has a simple manufacturing process, is made of ordinary steel, has a relatively simple steel structure, and uses conventional processing and welding techniques, which do not require high processing precision.

Claims

1. A thin plate segmented turning tool, characterized by: include: A main beam (10), a supporting beam (20) and at least three supports (30); The main beam (10) comprises a main beam top plate (1) and a main beam bottom plate, which are arranged to be a U-shaped structure of equal size and aligned up and down; between the main beam top plate (1) and the main beam bottom plate, an inner vertical plate (2), an outer vertical plate, and a main beam end plate (6) are connected perpendicular to the main beam top plate (1) and the main beam bottom plate; wherein the outer vertical plate is connected to the edges of the main beam top plate (1) and the main beam bottom plate, and the main beam end plate (6) is connected to the ends of the main beam top plate (1) and the main beam bottom plate, so as to surround the main beam top plate (1) and the main beam bottom plate into a U-shaped closed box structure; a through hole perpendicular to the main beam top plate (1) and the main beam bottom plate is also opened at the turning part of the U-shaped closed box structure, and the through hole is closed on all sides; in the U-shaped closed box structure, the main beam end plate (6) and the outer surface of the outer vertical plate facing the open end thereof are also welded with a main lifting lug (8) and a secondary lifting lug (9) for turning over; The support beam (20) includes a support beam top plate (13) and a support beam bottom plate, which are arranged to be a "mouth"-shaped structure of equal size and aligned left and right; between the support beam top plate (13) and the support beam bottom plate, a web plate (11) and a support beam end plate (14) are connected perpendicular to the support beam top plate (13) and the support beam bottom plate; wherein the web plate (11) connects the edges of the support beam top plate (13) and the support beam bottom plate, and the support beam end plate (14) connects the ends of the support beam top plate (13) and the support beam bottom plate, thereby enclosing the support beam top plate (13) and the support beam bottom plate into a "mouth"-shaped structure The closed box structure; the support beam (20) is perpendicular to the main beam (10) and passes through the through hole of the main beam (10); the outer surface of the web (11) of the support beam (20) is further provided with a stopper (18) on the upper and lower sides of the through hole, and the stopper (18) abuts against the main beam top plate (1) and the main beam bottom plate above and below the through hole to keep the support beam (20) and the main beam (10) vertically fixed; the outer surface of the support beam end plate (14) on the support beam (20) respectively provided on the upper and lower sides of the main beam (10) is further welded with a support beam lifting lug (17); The thin plate segment to be turned over is arranged on the main beam top plate (1) of the main beam (10), and its ends are respectively connected and fixed to the turning main lifting ears (8), the turning auxiliary lifting ears (9), and the supporting beam lifting ears (17), so that the main beam (10) and the supporting beam (20) can support the thin plate segment when the thin plate segment is turned over to avoid deformation thereof; The support (30) is arranged below the main beam (10) and is used to support the main beam (10), the supporting beam (20) connected thereto, and the thin plate segments arranged thereon; The main beam (10) includes two through holes, and the two through holes are oppositely arranged at two turning points of the U-shaped closed box structure; The through hole is surrounded by a partition plate welded by deep penetration welding to seal the through hole; the welded portion is polished and smooth; The main beam (10) is further provided with: long longitudinal ribs (3), short longitudinal ribs (4), main beam transverse ribs (5) and reinforcing flat steel (7) to support the main beam top plate (1), inner vertical plate (2), outer vertical plate, main beam bottom plate and the inner wall of the main beam end plate (6); The open end of the main beam (10) is arranged in the width direction of the U-shaped closed box structure; the two sides of the open end are the long arms of the main beam top plate (1) and the main beam bottom plate; the opposite side of the open end is the short arm of the main beam top plate (1) and the main beam bottom plate; The long longitudinal ribs (3) are arranged in the length direction of the U-shaped closed box structure, at the middle position of the long arms connecting the main beam top plate (1) and the main beam bottom plate; the long longitudinal ribs (3) are provided with lightening holes at intervals; The short longitudinal ribs (4) are arranged parallel to the length direction of the U-shaped closed box structure, connecting the main beam top plate (1) and the middle position of the short arm of the main beam bottom plate; the short longitudinal ribs (4) are provided with lightening holes; The main beam transverse ribs (5) are arranged parallel to the width direction of the U-shaped closed box structure, and the long arm connecting the main beam top plate (1) and the main beam bottom plate is close to one end of the opening; the main beam transverse ribs (5) are provided with lightening holes; The reinforcing flat steel (7) is arranged between the two through holes, connecting the main beam top plate (1) and the middle position of the short arm of the main beam bottom plate.

2. The thin plate segmented turning tool according to claim 1, characterized in that: The main beam top plate (1) and the main beam bottom plate are flat; the long longitudinal ribs (3), the short longitudinal ribs (4), the main beam transverse ribs (5) and the main beam top plate (1) and the main beam bottom plate are connected by fillet welding; the long longitudinal ribs (3), the short longitudinal ribs (4), the main beam transverse ribs (5) and the inner vertical plate (2) and the outer vertical plate are connected by double-sided groove deep fusion welding.

3. The thin plate segmented turning tool according to claim 1, characterized in that: The support (30) comprises: A crossbeam (23), comprising at least two crossbeams (23), wherein the crossbeams (23) are connected in a cross shape; Frames (22) comprising four frames, the ends of the frames (22) being connected to each other to form a square, and the middle positions of the frames (22) being connected to the ends of the crossbeams (23) respectively; The supporting legs (21) include four legs, the upper ends of the four supporting legs (21) are respectively connected to the ends of the frame (22); and the lower ends of the four supporting legs (21) are respectively connected to pads (24).

4. The thin plate segmented turning tool according to claim 3, characterized in that: The support (30) is a frame structure, wherein the legs (21), the frame (22) and the crossbeam (23) are all formed by splicing profiles, and the legs (21), the frame (22) and the crossbeam (23) are connected by butt welding and fillet welding.

5. The thin plate segmented turning tool according to claim 1, characterized in that: The support beam (20) is further provided with a central longitudinal rib (12), a support beam transverse rib (15) and a connecting truss to support the inner wall of the support beam top plate (13), the support beam bottom plate, the web plate (11) and the support beam end plate.

6. The thin plate segmented turning tool according to claim 5, characterized in that: The middle longitudinal rib (12) is arranged in the length direction of the support beam top plate (13) and the support beam bottom plate, connecting the middle position of the support beam top plate (13) and the support beam bottom plate; The support beam transverse ribs (15) are arranged in the width direction of the support beam top plate (13) and the support beam bottom plate, connecting the support beam top plate (13) and the support beam bottom plate; the support beam top plate (13) and the support beam bottom plate are connected to the middle longitudinal ribs (12) or the support beam transverse ribs (15) by fillet welding, and the middle longitudinal ribs (12) or the support beam transverse ribs (15) are connected to the web and the end plate by deep fusion welding; The connecting girder is a reinforced H-shaped steel (16), the main body of which is composed of an H-shaped steel and a reinforced bracket, and is connected by fillet welding.

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