Manufacturing method of marine titanium alloy thin-wall structure

Abstract

The invention provides a manufacturing method of a marine titanium alloy thin-wall structure. The method comprises the following steps that a titanium alloy thin-wall structure is provided, the titanium alloy thin-wall structure comprises a titanium alloy part and a bottom steel part, the titanium alloy part and the bottom steel part are connected through a transition joint, and the titanium alloy part is not provided with a margin value and is provided with a compensation value; dividing: segmenting the titanium alloy thin-wall structure according to the sizes of a port sheet structure, a starboard sheet structure, a front wall sheet structure and a deck sheet structure; outfitting and trepanning are conducted, specifically, outfitting and trepanning are conducted on the divided titanium alloy thin-wall structure through water cutting equipment; assembling and welding: assembling and welding the perforated titanium alloy thin-wall structure on a titanium alloy universal jig frame to obtain a larboard sheet structure, a starboard sheet structure, a front wall sheet structure and a deck sheet structure; and positioning and folding: positioning and folding the larboard sheet structure, the starboard sheet structure, the front wall sheet structure and the deck sheet structure on the titanium metal folding jig frame.

Description

Technical Field

[0001] The present application relates to the field of ship technology, and in particular to a method for manufacturing a thin-walled titanium alloy structure for a ship. Background Art

[0002] Titanium alloy refers to a variety of titanium alloy metals made of titanium and other metals, which are characterized by low density, high strength, good corrosion resistance, high heat resistance, low thermal conductivity and good low temperature performance. Titanium is an important structural metal developed in the 1950s. It was first used in high-tech fields such as aerospace. Now its application areas have expanded to chemical industry, petroleum, electricity, desalination, construction, daily life appliances and other fields. It is known as "modern metal" and "strategic metal".

[0003] Titanium alloy materials are mainly used in the shipbuilding field for hull structures, propulsion devices, acoustic devices, etc. The hull structure is mainly the pressure hull, and the main application of titanium alloy pressure hulls is deep-sea submersibles and submarines. Titanium alloy has the characteristics of high strength, good corrosion resistance, non-toxicity, and non-magnetism, making it a high-quality material for manufacturing pressure hulls of deep-sea equipment. The propulsion device is mainly a propeller. Compared with copper and steel, titanium alloy has advantages in corrosion fatigue strength and cavitation resistance. In addition, due to the low density of titanium alloy, when making propellers of the same size, the mass is smaller and the driving efficiency is higher. Acoustic devices are mainly sonar domes, hydroacoustic transducer components, and microphone parts. Compared with stainless steel and fiber-reinforced fiberglass, titanium alloy has advantages in sound transmission and collision resistance.

[0004] At present, there is not much research on the manufacturing of marine titanium alloy hull structures in China, and there is even less research on the manufacturing of titanium alloy thin-walled structures. The relevant specifications and process requirements are not clear and systematic enough to guide the manufacturing of titanium alloy thin-walled structures. Summary of the invention

[0005] The present application provides a method for manufacturing a thin-walled titanium alloy structure for ships.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a method for manufacturing a thin-walled titanium alloy structure for a ship, comprising the following steps:

[0008] A titanium alloy thin-walled structure is provided, the titanium alloy thin-walled structure comprises a titanium alloy part and a bottom steel part, the titanium alloy part and the bottom steel part are connected by a transition joint, the titanium alloy part is not set with an allowance value and a compensation value is set, and the bottom steel part is set with an allowance value and a compensation value;

[0009] Dividing the titanium alloy thin-wall structure into sections according to the sizes of the port lamellar structure, the starboard lamellar structure, the front wall lamellar structure, and the deck lamellar structure;

[0010] Outfitting opening: based on the opening sizes of the port sheet structure, the starboard sheet structure, the front wall sheet structure, and the deck sheet structure, the water jet cutting equipment is used to perform outfitting opening on the divided titanium alloy thin-walled structure;

[0011] Assembling and welding, assembling and welding the titanium alloy thin-walled structure after opening on the titanium alloy universal tire frame to obtain the port side sheet structure, the starboard side sheet structure, the front wall sheet structure, and the deck sheet structure;

[0012] Positioning and closing: positioning and closing the port sheet structure, starboard sheet structure, front wall sheet structure, and deck sheet structure on the titanium metal closing frame.

[0013] According to some embodiments of the present application, the titanium alloy part is set to have a compensation value of 0.3mm for each fillet weld, a longitudinal frame spacing of 500mm, a longitudinal compensation value of 0.6mm / 1000mm, a transverse frame spacing of 390mm, and a transverse compensation value of 0.9mm / 1170mm.

[0014] According to some embodiments of the present application, before the steps of assembling and welding, the method further includes:

[0015] The titanium alloy thin-walled structure after opening is welded to complete the assembly welding of the plate and profile parts, completing the small group manufacturing.

[0016] According to some embodiments of the present application, the welding method includes plasma arc welding or argon tungsten arc welding.

[0017] According to some embodiments of the present application, the steps are further included:

[0018] A drag hood tooling and a gravity tooling are provided, and the method is to use the drag hood tooling and the gravity tooling in conjunction with welding.

[0019] According to some embodiments of the present application, the material of the drag cover tooling includes copper or stainless steel;

[0020] The gravity tooling is composed of ordinary carbon steel and stainless steel shell, and is rectangular in shape. There are two gravity toolings, and the sizes of the two gravity toolings are 20mm×200mm×640mm and 20mm×200mm×1600mm respectively. The gravity tooling is placed on both sides of the butt joint or corner joint.

[0021] According to some embodiments of the present application, the steps of positioning and closing further include:

[0022] Lifting rings are provided. Lifting rings are respectively arranged on the port sheet structure, the starboard sheet structure, the front wall sheet structure and the deck sheet structure for lifting, turning over and positioning. The material of the lifting rings is AT3, and the lifting rings have two specifications, one of which is 8mm thick and has a load-bearing capacity of 3 tons; the other is 10mm thick and has a load-bearing capacity of 5 tons.

[0023] According to some embodiments of the present application, in the steps of assembly and welding, the titanium alloy universal tire frame is composed of angle steel pillars, angle steel longitudinal and transverse braces and stainless steel tire plates, and the angle steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

[0024] According to some embodiments of the present application, the titanium metal folding tire frame is composed of channel steel pillars, channel steel longitudinal and transverse braces, channel steel diagonal braces and stainless steel tire plates, and the channel steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

[0025] The beneficial effects of this application compared to the related prior art include:

[0026] The present invention ensures the finished size of the titanium alloy thin wall and avoids thermal cutting of the titanium alloy area by setting a compensation value in the titanium alloy part and a margin in the steel part. The construction difficulty of the intermediate assembly is reduced by adopting the sheet structure division method. The position and size of the outfitting openings are clarified in advance and CNC cutting is completed to avoid increasing the production cycle due to thermal cutting and grinding of a large number of openings in the later stage. Weld protection and deformation control are achieved through the support cover tooling and gravity tooling. The manufacture, turning over and closing of the sheet structure are realized through the titanium alloy exclusive universal tire frame, the titanium alloy exclusive lifting ring, and the titanium alloy sheet structure exclusive closing tire frame, and the manufacture of the titanium alloy thin-walled structure is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a flowchart of a method for manufacturing a thin-walled structure of a titanium alloy for shipbuilding in some embodiments of the present application;

[0029] Figure 2 It is a structural schematic diagram of the port side sheet structure;

[0030] Figure 3 It is a structural schematic diagram of the sheet structure on the starboard side;

[0031] Figure 4 It is a structural schematic diagram of the front wall sheet structure;

[0032] Figure 5 It is a structural schematic diagram of the deck sheet structure;

[0033] Figure 6 and Figure 7 They are schematic diagrams of the structure of the universal tire frame exclusively for titanium alloy at different viewing angles;

[0034] Figure 8 Titanium alloy exclusive rings in one of two sizes;

[0035] Fig. 9 and Fig.10 Schematic diagram of titanium alloy exclusive rings of one of the two specifications at different viewing angles;

[0036] Figure 11-13 They are schematic diagrams of the structure of the titanium alloy sheet structure exclusive folding tire frame at different viewing angles;

[0037] Fig.14 It is a schematic diagram of the drag cover tooling;

[0038] Fig.15 Schematic diagram of the gravity tooling. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the embodiments of the present application, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0045] See also Figure 1 , Figure 1 This is a flowchart of a method for manufacturing thin-walled titanium alloy structures for ships in some embodiments of the present application.

[0046] The present application provides a method for manufacturing a thin-walled titanium alloy structure for a ship, comprising the following steps:

[0047] S1. Provide a titanium alloy thin-walled structure, which includes a titanium alloy part and a bottom steel part, the titanium alloy part and the bottom steel part are connected by a transition joint, the titanium alloy part is not set with an allowance value and a compensation value is set, and the bottom steel part is set with an allowance value and a compensation value;

[0048] S2. Dividing the titanium alloy thin-walled structure into sections according to the sizes of the port lamellar structure, the starboard lamellar structure, the front wall lamellar structure, and the deck lamellar structure;

[0049] S3. Outfitting opening: Based on the opening sizes of the port sheet structure, the starboard sheet structure, the front wall sheet structure, and the deck sheet structure, the water jet cutting equipment is used to perform outfitting opening on the divided titanium alloy thin-walled structure;

[0050] S5. Assembling and welding: assembling and welding the opened titanium alloy thin-walled structure on a titanium alloy universal tire frame to obtain a port side sheet structure, a starboard side sheet structure, a front wall sheet structure, and a deck sheet structure;

[0051] S6. Positioning and closing: positioning and closing the port sheet structure, starboard sheet structure, front wall sheet structure, and deck sheet structure on the titanium metal closing frame.

[0052] According to some embodiments of the present application, the titanium alloy part is set to have a compensation value of 0.3mm for each fillet weld, a longitudinal frame spacing of 500mm, a longitudinal compensation value of 0.6mm / 1000mm, a transverse frame spacing of 390mm, and a transverse compensation value of 0.9mm / 1170mm.

[0053] According to some embodiments of the present application, before the steps of assembling and welding, the method further includes:

[0054] S4, small group manufacturing, the titanium alloy thin-walled structure after opening is welded to complete the assembly welding of plates and profile parts to complete the small group manufacturing.

[0055] According to some embodiments of the present application, the welding method includes plasma arc welding or argon tungsten arc welding.

[0056] According to some embodiments of the present application, the steps are further included:

[0057] A drag hood tooling and a gravity tooling are provided, and the method is to use the drag hood tooling and the gravity tooling in conjunction with welding.

[0058] According to some embodiments of the present application, the material of the drag cover tooling includes copper or stainless steel;

[0059] The gravity tooling is composed of ordinary carbon steel and stainless steel shell, and is rectangular in shape. There are two gravity toolings, and the sizes of the two gravity toolings are 20mm×200mm×640mm and 20mm×200mm×1600mm respectively. The gravity tooling is placed on both sides of the butt joint or corner joint.

[0060] According to some embodiments of the present application, the steps of positioning and closing further include:

[0061] Lifting rings are provided. Lifting rings are respectively arranged on the port sheet structure, the starboard sheet structure, the front wall sheet structure and the deck sheet structure for lifting, turning over and positioning. The material of the lifting rings is AT3, and the lifting rings have two specifications, one of which is 8mm thick and has a load-bearing capacity of 3 tons; the other is 10mm thick and has a load-bearing capacity of 5 tons.

[0062] According to some embodiments of the present application, in the steps of assembly and welding, the titanium alloy universal tire frame is composed of angle steel pillars, angle steel longitudinal and transverse braces and stainless steel tire plates, and the angle steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

[0063] According to some embodiments of the present application, the titanium metal folding tire frame is composed of channel steel pillars, channel steel longitudinal and transverse braces, channel steel diagonal braces and stainless steel tire plates, and the channel steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

[0064] The beneficial effects of this application compared to the related prior art include:

[0065] The present invention ensures the finished size of the titanium alloy thin wall and avoids thermal cutting of the titanium alloy area by setting a compensation value in the titanium alloy part and a margin in the steel part. The construction difficulty of the intermediate assembly is reduced by adopting the sheet structure division method. The position and size of the outfitting openings are clarified in advance and CNC cutting is completed to avoid increasing the production cycle due to thermal cutting and grinding of a large number of openings in the later stage. Weld protection and deformation control are achieved through the support cover tooling and gravity tooling. The manufacture, turning over and closing of the sheet structure are realized through the titanium alloy exclusive universal tire frame, the titanium alloy exclusive lifting ring, and the titanium alloy sheet structure exclusive closing tire frame, and the manufacture of the titanium alloy thin-walled structure is completed.

[0066] In some embodiments, the present application provides a method for manufacturing a thin-walled titanium alloy structure for a ship, wherein the margin is set in the steel part at the bottom, and only the compensation value is set in the titanium alloy part. The titanium alloy thin-walled structure is divided into four sheet structures, and the CNC cutting of the openings of doors, windows, and outfitting parts is basically completed in the processing stage. A towing cover tool is made to protect the weld, and a gravity tool is made to control the deformation. A titanium alloy exclusive universal tire frame is made to complete the manufacture of the sheet structure, a titanium alloy exclusive lifting ring is made to complete the turning over and lifting of the sheet structure, and a dedicated closing tire frame is made to complete the rapid closing of the four sheet structures. The manufacturing method is as follows: the titanium alloy thin-walled structure is divided into a port sheet structure, a starboard sheet structure, a front wall sheet structure, and a deck sheet structure. The outfitting openings of the titanium alloy thin-walled structure are basically completed by water cutting equipment. The small group manufacturing of plate and profile parts is completed by welding methods such as plasma arc welding and tungsten inert gas arc welding. The manufacture of four sheet structures is completed on a titanium alloy exclusive universal tire frame. The titanium alloy exclusive lifting ring is used to complete the turning, hoisting and positioning of the sheet structure. The titanium alloy sheet structure exclusive closure frame is used to complete the closure manufacturing of the titanium alloy thin-walled structure.

[0067] Please note that, see Figure 2-Figure 15 , Figure 2 This is a schematic diagram of the structure of the port side sheet structure. Figure 3 This is a schematic diagram of the starboard sheet structure. Figure 4 It is a schematic diagram of the structure of the front wall sheet structure. Figure 5 This is a schematic diagram of the deck sheet structure. Figure 6 and Figure 7 They are the structural schematic diagrams of the titanium alloy exclusive universal tire frame at different viewing angles. Figure 8 Titanium alloy exclusive rings in one of two sizes. Fig. 9 and Fig.10 Schematic diagram of one of the two specifications of titanium alloy exclusive rings at different viewing angles. Figure 11-13 They are schematic diagrams of the structure of the titanium alloy sheet structure exclusive folding tire frame at different viewing angles. Fig.14 This is a schematic diagram of the drag cover tooling. Fig.15 Schematic diagram of the gravity tooling.

[0068] As a preferred technical solution, only a compensation value is set for the titanium alloy part of the titanium alloy thin-walled structure, a compensation value of 0.3 mm is set for each fillet weld, and a margin value is set for the bottom steel part.

[0069] As a preferred technical solution, the titanium alloy thin-wall structure is divided into a port side sheet structure, a starboard side sheet structure, a front wall sheet structure, and a deck sheet structure.

[0070] As a preferred technical solution, the location and size of the openings for doors, windows and outfitting parts must be determined in advance and completed by CNC cutting.

[0071] As a preferred technical solution, the drag cover tooling is made of copper or stainless steel and has a cylindrical or rectangular shape, which can protect the weld.

[0072] As a preferred technical solution, the gravity tooling is composed of ordinary carbon steel and stainless steel shell, with a rectangular shape and two sizes: 20mm×200mm×640mm and 20mm×200mm×1600mm. It is placed on both sides of the butt joint or corner joint to reduce welding deformation.

[0073] As a preferred technical solution, the titanium alloy exclusive universal tire frame is composed of angle steel pillars, angle steel longitudinal and transverse braces and stainless steel tire plates, and the angle steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

[0074] As the preferred technical solution, the exclusive titanium alloy ring material is TA3, the thickness is 8mm and 10mm, and the ring types are 3 tons and 5 tons.

[0075] As the preferred technical solution, the titanium alloy sheet structure is exclusively used for the folding tire frame, which is composed of channel steel pillars, channel steel longitudinal and transverse braces, channel steel diagonal braces and stainless steel tire plates. The channel steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

[0076] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for manufacturing a thin-walled titanium alloy structure for shipbuilding, characterized in that: The following steps are involved: A titanium alloy thin-walled structure is provided, the titanium alloy thin-walled structure comprising a titanium alloy part and a bottom steel part, the titanium alloy part and the bottom steel part are connected by a transition joint, the titanium alloy part is not set with a margin value and is set with a compensation value, and the bottom steel part is set with a margin value and a compensation value; Dividing the titanium alloy thin-wall structure into sections according to the sizes of the port lamellar structure, the starboard lamellar structure, the front wall lamellar structure, and the deck lamellar structure; Outfitting openings: based on the opening sizes of the port sheet structure, the starboard sheet structure, the front wall sheet structure, and the deck sheet structure, outfitting openings are performed on the divided titanium alloy thin-walled structure using a water jet cutting device; Assembling and welding, assembling and welding the titanium alloy thin-walled structure after opening on a titanium alloy universal tire frame to obtain the port side sheet structure, the starboard side sheet structure, the front wall sheet structure, and the deck sheet structure; Positioning and closing: positioning and closing the port side sheet structure, the starboard side sheet structure, the front wall sheet structure, and the deck sheet structure on a titanium metal closing frame.

2. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 1, characterized in that: The titanium alloy part is set as follows: the compensation value of each fillet weld is 0.3mm, the longitudinal frame spacing is 500mm, the longitudinal compensation value is 0.6mm / 1000mm, the transverse frame spacing is 390mm, and the transverse compensation value is 0.9mm / 1170mm.

3. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 1, characterized in that: Before step assembly and welding, it also includes: The titanium alloy thin-walled structure after opening is welded to complete the assembly welding of the plate and profile parts, completing the small group manufacturing.

4. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 3, characterized in that: The welding method includes plasma arc welding or tungsten inert gas arc welding.

5. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 3, characterized in that: Also includes the steps: A drag cover tool and a gravity tool are provided, and the method is used in conjunction with the drag cover tool and the gravity tool during welding.

6. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 5, characterized in that: The material of the drag cover tooling includes copper or stainless steel; The gravity tooling is composed of ordinary carbon steel and stainless steel shell, and is rectangular in shape. There are two gravity toolings, and the sizes of the two gravity toolings are 20mm×200mm×640mm and 20mm×200mm×1600mm respectively. The gravity tooling is placed on both sides of the butt joint or corner joint.

7. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 1, characterized in that: In the steps of positioning and closing, it also includes: A lifting ring is provided, and the port side sheet structure, the starboard side sheet structure, the front wall sheet structure, and the deck sheet structure are respectively provided with the lifting ring for lifting, turning over and positioning. The material of the lifting ring is AT3, and the lifting ring has two specifications, one of which is 8 mm thick and has a load-bearing capacity of 3 tons; the other is 10 mm thick and has a load-bearing capacity of 5 tons.

8. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 1, characterized in that: In the steps of assembly and welding, the titanium alloy universal tire frame is composed of angle steel pillars, angle steel longitudinal and transverse braces and stainless steel tire plates, and the angle steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

9. The method for manufacturing a thin-walled titanium alloy structure for shipbuilding according to claim 1, characterized in that: The titanium metal folding tire frame is composed of channel steel pillars, channel steel longitudinal and transverse braces, channel steel diagonal braces and stainless steel tire plates, and the channel steel longitudinal and transverse braces and the stainless steel tire plates are connected by bolts.

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