Uncoiling-bending-connecting integrated manufacturing method for large high-strength metal ring cylinder part

Abstract

The invention provides an uncoiling-bending-connecting integrated manufacturing method for a large high-strength metal ring cylinder part, which comprises the following steps: S10, selecting a high-strength metal sheet with the thickness of 2-8 mm; s20, the coiled material of the metal sheet is placed on a vertical uncoiler to be uncoiled; s30, the uncoiled metal sheet has a first bending direction, the metal sheet straightly enters a vertical roll bending machine to be continuously rolled, the rolled metal sheet has a second bending direction, and the first bending direction is opposite to the second bending direction; s40, a vertical plate shearing machine is adopted to shear off the metal thin plate meeting the preset length, and when the metal thin plate is kept upright, the metal thin plate is welded to form an annular cylinder part; according to the rolling and bending integrated technology, the decoiling step in the rolling and bending technology is removed, decoiling, rolling and bending and welding are integrated into the integrated technology, and the problems that in a traditional technology, multiple times of transferring and positioning are conducted, and the equipment occupies the area are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rolling and bending, and in particular to an integrated manufacturing method for unrolling, bending and connecting a large high-strength metal ring cylinder. Background Art

[0002] When using high-strength (yield strength ≥ 800MPa) metal plates to make ring cylinders, the conventional ingot punching and ring rolling process has a very low material utilization rate and is difficult to process. Severe deformation is also introduced during the preparation process, and complex tooling and stress relief annealing and rounding are required, making it difficult to control dimensional accuracy. In addition, multi-directional forging of 10-meter-level components is difficult, and the components are prone to uneven structure in the thickness direction and severe anisotropy, making it difficult to ensure the overall mechanical properties of the ring.

[0003] Compared with press bending and stretch bending, the roll forming process has the advantages of stable and efficient forming and small required rolling force, and has become the main forming process for cylindrical and curved parts. The roll forming of large high-strength metal plate thin-walled rings with a diameter of 10 meters requires the forming equipment to have high precision and strong forming capabilities. It must also strictly control defects in the forming process while ensuring material properties, such as springback, edge waves, wrinkles and cross-sectional deformation. In recent years, a lot of research has been done on the modeling and simulation of sheet metal roll bending, but it is only applicable to the roll forming of small workpieces. There are few reports on large-size workpieces, and there is a lack of mature process parameters and optimization methods.

[0004] At present, the mainstream process for manufacturing large-size (R≥5) diameter rings is horizontal rolling + multi-weld welding, which requires complex tooling and multiple processing steps. In the traditional horizontal rolling process, large-diameter thin-walled cylinders (such as 10-meter-level) sag due to their own weight, causing serious instability and local deformation, and need to rely on additional support devices, further increasing the complexity of the process. Multiple welding introduces a large number of welds (more than 5), and defects such as pores and cracks are prone to occur in the weld area, weakening the overall structural strength of the ring; multi-step processing leads to cumulative errors, dimensional accuracy is difficult to control (diameter deviation ≥2%), and the thickness direction is non-uniform. Summary of the invention

[0005] The invention provides a method for manufacturing a large-scale high-strength metal ring cylinder by unrolling, bending and connecting in an integrated manner, the purpose of which is to improve the structural strength and forming accuracy of the existing large-scale high-strength metal ring cylinder after manufacturing.

[0006] In order to achieve the above-mentioned object, an embodiment of the present invention provides an integrated manufacturing method of unwinding-bending-connecting a large-scale high-strength metal ring cylinder, comprising: S10. Select a high-strength metal sheet with a thickness of 2-8 mm; S20. Placing the metal sheet coil on a vertical uncoiler for uncoiling; S30. The uncoiled metal sheet has a first bending direction, and the metal sheet directly enters the vertical rolling machine for continuous rolling. The rolled metal sheet has a second bending direction, and the first bending direction and the second bending direction are opposite; S40. Use a vertical shearing machine to cut the metal sheet to a preset length, and weld the two ends of the metal sheet to form a ring cylinder while the metal sheet remains in an upright state; the preset length is the circumference of the required ring cylinder.

[0007] Preferably, the vertical uncoiler has a rubber roller, the coil of the metal sheet has a free end, the rubber roller is arranged in the opposite direction of the first bending direction of the free end, and the rubber roller is pressed against the metal sheet.

[0008] Preferably, the vertical rolling bending machine is a symmetrical three-roller rolling bending device, which includes two driven rollers and one active roller, and the active roller and the two driven rollers are arranged in an isosceles triangle. The active roller is located in the second bending direction of the metal sheet, and the two driven rollers are located in the opposite direction of the second bending direction of the metal sheet. The pressing amount of the active roller is determined based on the diameter of the required annular cylinder.

[0009] Preferably, the pressing amount of the active roller (21) satisfies the formula group: Wherein, R is the radius of the required annular cylinder, and R≥4m, H is the amount of reduction, T is the thickness of the metal sheet, D is the diameter of the driven roller, and L is the distance between the two driven rollers.

[0010] Preferably, a distance meter for recording the length of the metal sheet passing through the active roller is provided at the upper end of the active roller.

[0011] Preferably, a traction roller and a limiting roller are further arranged between the vertical uncoiler and the vertical rolling machine. The traction rollers are arranged on both sides of the forward path of the metal sheet, and the traction rollers are used to guide the metal sheet into the vertical rolling machine. The limiting rollers are closer to the vertical rolling machine than the traction rollers, and the limiting rollers are used to limit the ends of the metal sheet so that the metal sheet can enter the vertical rolling machine.

[0012] Preferably, a speed-increasing guide roller is further provided on the moving path of the metal sheet, and the speed-increasing guide roller is used to reduce the friction between the metal sheet and the ground.

[0013] Preferably, the distance between the two driven rollers is 400-800 mm, and the diameters of the driven roller and the driving roller are 240-200 mm.

[0014] The above scheme of the present invention has the following beneficial effects: In this application, the unwinding step in the rolling process is removed, and unwinding, rolling and welding are integrated into an integrated process, which not only greatly reduces the multiple transfers, positioning and equipment area occupied in the traditional process, but also improves production efficiency, reduces manufacturing costs, and ensures the overall structural strength and consistency of the ring cylinder.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a working schematic diagram of the present invention; Figure 2 This is the relationship between the amount of pressure reduction of the active roller and the diameter of the ring cylinder.

[0017] [Description of Reference Numerals] 10-vertical uncoiler, 20-vertical roll bending machine, 21-active roller, 22-driven roller, 30-vertical shearing machine, 40-traction roller, 50-limiting roller, 60-speed guide roller, 70-vertical welding machine, S1-first bending direction, S2-second bending direction. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0019] In the existing technology, the production of large-scale high-strength metal rings is usually carried out by horizontal rolling and multiple weld splicing. In the traditional horizontal rolling process, large-diameter thin-walled cylinders (such as 10-meter-class) sag due to their own weight, causing serious instability and local deformation; moreover, multiple welding during the forming process of the ring cylinder weakens the overall strength of the ring.

[0020] In the production of small ring parts, a segmented process including "uncoiling-flattening-rolling-welding" is usually adopted. Although large ring cylinder parts can also be produced by referring to the segmented process, for large-diameter ring cylinder parts, the flattening mechanism required requires an extra-long working length, occupies a large area, and has a very low cost-effectiveness. In addition, multiple transfer and positioning of the plates are required between each process, which takes a lot of time and prolongs the production cycle.

[0021] Reference Figure 1 to Figure 2 The present application provides a large-scale high-strength metal ring cylinder unwinding-bending-connecting integrated manufacturing method, comprising the following steps: S10. Select a high-strength metal sheet that meets the requirements, and the thickness of the metal sheet is 2-8 mm.

[0022] S20. The metal sheet coil is placed on a vertical uncoiler 10 for uncoiling; S30. The uncoiled metal sheet has a first bending direction S1. One end of the uncoiled metal sheet directly enters the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2. The first bending direction S1 is opposite to the second bending direction S2.

[0023] S40. During the continuous rolling process, the length of the metal sheet is measured. When the length of the metal sheet entering the vertical rolling machine 20 reaches a preset length, the metal sheet is cut and the rolled metal sheet is maintained in an upright state. The two ends of the metal sheet are welded to form an annular tube. The aforementioned preset length is the circumference of the required annular tube.

[0024] In the present application, a vertical uncoiler 10 is used for uncoiling to ensure that the metal sheet is in an upright state. The uncoiled metal sheet has a first bending direction S1. The metal sheet is not subjected to a flattening process, but directly enters a vertical rolling machine 20 for rolling. The rolled metal sheet has a second bending direction S2, which is opposite to the first bending direction S1. The vertical rolling machine 20 rolls the metal sheet in the second bending direction S2 opposite to the first bending direction S1. During the rolling process, the vertical uncoiler applies opposite stresses on the metal sheet, thereby offsetting the rebound effect and reducing the forming error.

[0025] Furthermore, the first bending direction S1 and the second bending direction S2 are opposite, which helps to evenly distribute the stress inside the metal sheet and avoid thickness thinning or deformation (such as edge waves and wrinkles) caused by local stress concentration.

[0026] On the other hand, if the first bending direction S1 and the second bending direction S2 are the same, problems such as springback accumulation and stress concentration may easily occur. In particular, in the present application where the step of flattening is omitted, the radius of the metal sheet coil is reduced during coiling. If the metal sheet is rolled in the first bending direction S1 by a vertical rolling machine, the forming radius may be further reduced, and the target forming radius may not be reached.

[0027] In the present application, the unwinding process is omitted, thereby avoiding the need for unwinding and occupying a large amount of space. In addition, by rolling the metal sheet in the second bending direction S2, the stress in the metal sheet is eliminated, thereby achieving the unwinding effect. The processing technology of vertical unwinding, vertical rolling and vertical welding effectively suppresses the sagging and instability problem of the ring cylinder caused by the deadweight of the metal sheet in the traditional horizontal process, and saves a lot of space in the production process of large ring cylinders because the unwinding process is not required.

[0028] In the present application, a vertical uncoiler 10 is used for uncoiling to ensure that the metal sheet is in an upright state. The metal sheet after uncoiling has a first bending direction S1. The metal sheet is not flattened, but directly enters the vertical rolling machine 20 for rolling. The metal sheet after rolling has a second bending direction S2, which is opposite to the first bending direction S1.

[0029] In step S20, the vertical uncoiler 10 has a rubber roller, and the metal sheet coil has a free end, which first enters the vertical roll bending machine 20. The rubber roller is arranged in the opposite direction of the first bending direction S1 of the free end, and the rubber roller is pressed against the metal sheet. The rubber roller is used to prevent the metal sheet coil from expanding and unwinding.

[0030] Furthermore, the vertical rolling machine 20 is a symmetrical three-roller rolling device, which includes two driven rollers 22 and one active roller 21. The active roller 21 and the driven roller 22 are arranged in an isosceles triangle. The active roller 21 is located in the second bending direction S2 of the metal sheet, and the two driven rollers 22 are located in the opposite direction of the second bending direction S2 of the metal sheet. The pressing amount of the active roller 21 is adjusted based on the diameter of the annular cylinder. The pressing amount of the active roller 21 satisfies: In the formula, R is the radius of the required annular cylinder, and R≥4m, H is the pressing amount, T is the thickness of the metal sheet, D is the diameter of the driven roller 22, and L is the distance between the two driven rollers 22.

[0031] It can be understood that the minimum distance between the two driven rollers 22 is the sum of the radii of the two driven rollers 22. In the present application, the diameters of the two driven rollers 22 are equal.

[0032] In the present application, the spacing between the two driven rollers 22 is set to 400-800 mm, and the spacing between the two driven rollers 22 can accurately control the bending curvature of the metal sheet. When the spacing between the two driven rollers 22 is less than 400 mm, the movement of the metal sheet is easily hindered and wrinkles are generated. When the spacing is greater than 800 mm, insufficient forming force will result. Preferably, the spacing between the two driven rollers 22 is 465-610 mm.

[0033] The diameter of the driven roller 22 and the active roller 21 is 240-300mm to ensure that the bending stress is evenly distributed and local deformation and thickness reduction are avoided. The pressing amount of the active roller 21 is adjusted according to the required diameter of the annular cylinder, and then the pressing amount is selected according to theoretical calculation to ensure that the error between the actual diameter of the manufactured annular cylinder and the target diameter of the annular cylinder is within an acceptable range.

[0034] A distance meter is also provided at the upper end of the aforementioned active roller 21, which is used to record the length of the metal sheet passing through the active roller 21 to determine whether it reaches the preset length. The preset length is 500mm longer than the circumference of the annular cylinder, so as to facilitate the straightening of the free end according to the national standard.

[0035] In step S40, the vertical shearing machine 30 is used to shear the metal sheet along the height direction.

[0036] In step S40, the metal sheet is welded by a vertical welding machine 70. Since the metal sheet is cut only once, the ring cylinder manufactured by the present application has only one weld. Compared with conventional welding, the number of defects that may occur in the weld area is reduced, which helps to improve the structural strength and stability of the entire ring cylinder, especially when subjected to high stress and complex loads. The single-pass weld simplifies the welding process, reduces the time spent on multiple welding and inspection, and increases production efficiency by 10 times.

[0037] Preferably, in order to allow the metal sheet to enter the vertical rolling machine 20 from the vertical uncoiler 10, a traction roller 40 and a limiting roller 50 are also arranged between the two. The traction roller 40 is arranged on both sides of the metal sheet's forward path. The traction roller 40 is used to guide the metal sheet into the vertical rolling machine 20. The limiting roller 50 is closer to the vertical rolling machine 20 than the traction roller 40. The limiting roller 50 is used to limit the end (i.e., the free end) of the metal sheet so that the metal sheet can enter the vertical rolling machine 20.

[0038] In the present application, two traction rollers 40 are provided, and the two traction rollers 40 are arranged on both sides of the metal sheet. The aforementioned vertical rolling bending machine 20 is arranged at the connection between the metal sheet having the first bending direction S1 and the metal sheet having the second bending direction S2, and the limiting roller 50 and the active roller 21 are located on the same side of the metal sheet.

[0039] Preferably, a speed-increasing guide roller 60 is further provided on the moving path of the metal sheet, and a speed-increasing guide tube is provided on the ground and is made of the metal sheet, so as to reduce the friction between the metal sheet and the ground.

[0040] Example 1 The target forming radius of the annular cylinder produced in this embodiment is 10608 mm.

[0041] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 465 mm, the pressing amount of the active roller 21 is 32 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0042] The outer diameter of the formed annular cylinder is 10607.9 mm.

[0043] Example 2 The target forming radius of the annular cylinder produced in this embodiment is 10608 mm.

[0044] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 610 mm, the pressing amount of the active roller 21 is 56 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0045] The outer diameter of the formed annular cylinder is 10607.6 mm.

[0046] Example 3 The target forming radius of the annular cylinder produced in this embodiment is 10608 mm.

[0047] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing between the driven rollers 22 is 800 mm, the pressing amount of the active roller 21 is 100 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0048] The outer diameter of the formed annular cylinder is 10607.8 mm.

[0049] Comparative Example 1 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0050] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 465 mm, the pressing amount of the active roller 21 is 56 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0051] The ring cylinder parts are seriously deformed and wrinkled.

[0052] Comparative Example 2 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0053] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 465 mm, the pressing amount of the active roller 21 is 32 mm, the roller speed of the active roller 21 is 10 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0054] The outer diameter of the formed annular cylinder is 10609.7 mm.

[0055] Comparative Example 3 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0056] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 465 mm, the pressing amount of the active roller 21 is 32 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 200 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0057] The outer diameter of the formed annular cylinder is 10605.2mm.

[0058] Comparative Example 4 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0059] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 610 mm, the pressing amount of the active roller 21 is 100 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0060] The ring cylinder parts are seriously deformed and wrinkled.

[0061] Comparative Example 5 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0062] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 610 mm, the pressing amount of the active roller 21 is 56 mm, the roller speed of the active roller 21 is 10 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0063] The outer diameter of the formed annular cylinder is 10606.9 mm.

[0064] Comparative Example 6 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0065] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 610 mm, the pressing amount of the active roller 21 is 56 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 200 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0066] The outer diameter of the formed annular cylinder is 10605.3mm.

[0067] Comparative Example 7 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0068] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing between the driven rollers 22 is 800 mm, the pressing amount of the active roller 21 is 56 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0069] The ring cylinder did not undergo plastic deformation.

[0070] Comparative Example 8 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0071] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing between the driven rollers 22 is 800 mm, the pressing amount of the active roller 21 is 100 mm, the roller speed of the active roller 21 is 10 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0072] The outer diameter of the formed annular cylinder is 10607.3mm.

[0073] Comparative Example 9 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0074] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing between the driven rollers 22 is 800 mm, the pressing amount of the active roller 21 is 100 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 200 mm; S40. The vertical shearing machine 30 cuts the metal sheet when the length reaches the preset length, and the vertical welding machine 70 is used for welding. The vertical welding machine 70 is an 8~12 kW high-power fiber laser, and the melting depth reaches 80%~90% of the plate thickness (the melting depth of 4 mm plate is ≥3.2 mm), and the welding speed is controlled to be 1.5~2.5 m / min.

[0075] The outer diameter of the formed annular cylinder is 10605.7mm.

[0076] Comparative Example 10 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0077] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a horizontal uncoiler for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet directly enters the horizontal rolling device for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 465 mm, the pressing amount of the active roller 21 is 32 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The horizontal shearing machine cuts the metal sheet when the length reaches the preset length. After shearing, the sheet is transported to the welding site through the lifting device for horizontal welding, and welding is performed using traditional arc welding equipment.

[0078] Serious instability and deformation occur during the forming process.

[0079] Comparative Example 11 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0080] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a vertical uncoiler 10 for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 465 mm, the pressing amount of the active roller 21 is 32 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 200 mm; S40. The vertical shearing machine 30 shears the metal sheet when the length is one quarter of the target forming circumference, and welds the four metal arc plates using conventional arc welding equipment.

[0081] The outer diameter of the formed annular cylinder is 10603.8 mm.

[0082] Comparative Example 12 The target forming radius of the annular cylinder produced in this comparative example is 10608 mm.

[0083] S10. Select semi-hardened 304L stainless steel high-strength metal plate with a thickness of 4 mm; S20. The metal sheet coil is placed in a horizontal uncoiler for uncoiling, the coil having a diameter of 500mm-1300mm and a height of 2000mm; S30. The uncoiled metal sheet has a first bending direction S1, and the metal sheet goes straight into the vertical rolling machine 20 for continuous rolling. The rolled metal sheet has a second bending direction S2, and the first bending direction S1 and the second bending direction S2 are opposite; The spacing of the driven roller 22 is 465 mm, the pressing amount of the active roller 21 is 32 mm, the roller speed of the active roller 21 is 4 m / min, and the diameters of the active roller 21 and the driven roller 22 are both 300 mm; S40. The horizontal shearing machine shears the metal sheet when the length is one quarter of the target forming circumference, and the four metal arc plates are welded using conventional arc welding equipment.

[0084] The outer diameter of the formed annular cylinder is 10602.6mm.

[0085] Table 1 Comparison of forming accuracy and production efficiency between the embodiment and the comparative example

[0086] The ring cylinder processed in this application has a deviation of the actual arc profile from the theoretical value of ≤ 0.8mm, a generatrix straightness of ≤1mm (high forming accuracy), a surface roughness of ≤0.4μm, and a smooth surface without unevenness, cracks or other surface defects.

[0087] The advantages of this application are: First, the integrated design of vertical uncoiling, vertical rolling and vertical welding effectively suppresses the sagging and instability problem caused by the deadweight of metal sheets in traditional horizontal processes.

[0088] Second, only one welding is performed during the processing, which reduces the number of welds and avoids multiple assembly, thereby reducing the number of defects that may occur in the weld area and improving the structural strength and stability of the ring cylinder, especially when subjected to high stress and complex loads.

[0089] Third, the present invention can improve the utilization rate of metal sheets and reduce the generation of waste and scraps. The material utilization rate of the traditional horizontal process is only 60%-70% due to multiple welding and complex tooling, while the present invention has only one welding, which significantly improves the material utilization rate.

[0090] Fourthly, the present application omits the unwinding process and utilizes the synergistic effect of the vertical unwinding machine 10 and the vertical rolling machine 20 to achieve a seamless connection of “unwinding-rolling” and reduce the floor space required for the overall process.

[0091] Fifth, obtain the relationship between the target diameter of the ring cylinder and the amount of reduction, achieve rapid matching of roller parameters and single-pass forming accuracy, and control the error between the finished product diameter and the target diameter within an acceptable error range (such as within ±0.5%).

[0092] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A large-scale high-strength metal ring tube unwinding-bending-connecting integrated manufacturing method, characterized in that: include: S10. Select a high-strength metal sheet with a thickness of 2-8 mm; S20. Placing the metal sheet coil on a vertical uncoiler (10) for uncoiler; S30. The uncoiled metal sheet has a first bending direction (S1), and the metal sheet directly enters the vertical rolling machine (20) for continuous rolling. The rolled metal sheet has a second bending direction (S2), and the first bending direction (S1) and the second bending direction (S2) are opposite; S40. Using a vertical shearing machine (30) to cut the metal sheet to a preset length, and welding the two ends of the metal sheet to form a cylindrical ring while the metal sheet is kept in an upright state; the preset length is the circumference of the desired cylindrical ring.

2. The method for manufacturing large-scale high-strength metal ring cylinder by unwinding, bending and connecting according to claim 1 is characterized in that: The vertical uncoiler (10) has a rubber roller, the coil of the metal sheet has a free end, the rubber roller is arranged in the opposite direction of the first bending direction (S1) of the free end, and the rubber roller is pressed against the metal sheet.

3. The method for manufacturing large-scale high-strength metal ring cylinder by unwinding, bending and connecting according to claim 2 is characterized in that: The vertical rolling machine (20) is a symmetrical three-roller rolling device, comprising two driven rollers (22) and one active roller (21), wherein the active roller (21) and the two driven rollers (22) are arranged in an isosceles triangle, wherein the active roller (21) is located in the second bending direction (S2) of the metal sheet, and the two driven rollers (22) are located in the opposite direction of the second bending direction (S2) of the metal sheet, and the pressing amount of the active roller (21) is determined based on the diameter of the required annular cylinder.

4. The method for manufacturing large-scale high-strength metal ring cylinder by unwinding, bending and connecting according to claim 3 is characterized in that: The pressing amount of the active roller (21) satisfies the formula group: In the formula, R is the radius of the required annular cylinder, and R ≥ 4m, H is the pressing amount, T is the thickness of the metal sheet, D is the diameter of the driven roller (22), and L is the distance between the two driven rollers (22).

5. The method for manufacturing large-scale high-strength metal ring cylinder by unwinding, bending and connecting in an integrated manner according to claim 3, characterized in that: A distance meter for recording the length of the metal sheet passing through the active roller (21) is provided at the upper end of the active roller (21).

6. The method for manufacturing large-scale high-strength metal ring cylinder by unwinding, bending and connecting in an integrated manner according to claim 1, characterized in that: A traction roller (40) and a limiting roller (50) are also provided between the vertical uncoiler (10) and the vertical roll bender (20); the traction roller (40) is provided on both sides of the advancing path of the metal sheet; the traction roller (40) is used to guide the metal sheet into the vertical roll bender (20); the limiting roller (50) is closer to the vertical roll bender (20) than the traction roller (40); the limiting roller (50) is used to limit the end of the metal sheet so that the metal sheet enters the vertical roll bender (20).

7. The method for manufacturing large-scale high-strength metal ring cylinder by unwinding, bending and connecting in an integrated manner according to claim 1, characterized in that: A speed-increasing guide roller (60) is also provided on the moving path of the metal sheet, and the speed-increasing guide roller (60) is used to reduce the friction between the metal sheet and the ground.

8. The method for manufacturing large-scale high-strength metal ring cylinder by unwinding, bending and connecting in an integrated manner according to claim 4, characterized in that: The distance between the two driven rollers (22) is 400-800 mm, and the diameters of the driven roller (22) and the active roller (21) are 240-200 mm.

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