High-stability welding full-plane special material composite board loose lining structure and machining method thereof

Abstract

The invention belongs to the technical field of welding, and discloses a high-stability welding full-plane special-material composite board loose lining structure and a machining method thereof, and the high-stability welding full-plane special-material composite board loose lining structure comprises a base layer, a composite layer and fastening screws; a plurality of butt joint grooves are formed in the base layer, and screw holes are formed in the centers of the butt joint grooves; a fixing hole matched with the screw hole is formed in the composite layer, and the composite layer is provided with a flanging structure on the hole edge of the fixing hole; the composite layer is arranged on the base layer, and the fastening screws penetrate through the fixing holes and then are screwed into the screw holes; an abutting ring is arranged on the lower portion of the screw head of the fastening screw in the circumferential direction, the abutting ring and the flanging structure are both located in the butt joint groove, and the upper portion of the flanging structure is connected with the upper portion of the screw head in a welded mode. The loose lining composite board solves the problems that in the prior art, a composite layer of a loose lining composite board is prone to falling off, the stress performance is relatively poor, and protrusions exist on the surface of a loose lining structure.

Description

Technical Field

[0001] The present application belongs to the field of welding technology, and specifically relates to a high-stability welded full-plane special material composite plate loose lining structure and a processing method thereof. Background Art

[0002] Rare metals, such as titanium, tantalum, niobium, zirconium and nickel, have been widely used in fields such as chemical industry that require high corrosion resistance due to their excellent properties. However, due to the high cost of rare metals, composite plates are usually used to reduce the overall cost. Such composite plates are mostly double-layer structures, one of which is a corrosion-resistant rare metal with a thickness ranging from 0.4 mm to 4 mm; the other layer is steel or stainless steel, and its thickness is calculated based on the required strength and stiffness.

[0003] There are three main ways to connect composite panels: explosive bonding, rolling bonding and loose lining welding. However, explosive bonding and rolling bonding are not only expensive, but also have complex process flows and long construction periods, and are also inadequate in terms of environmental protection and energy saving.

[0004] like Figure 7 As shown, about the existing loose lining composite board structure, there are protrusions on its surface, resulting in uneven board surface, which limits the application range of the loose lining composite board to a great extent, because many occasions require that the composite board must be full-plane. In addition, when the loose lining composite board is subjected to negative pressure on one side of the rare metal cladding 4, the existing loose lining structure only relies on the existing screws 11 to be supported by force, which very easily causes the cladding 4 to fall off. Moreover, the existing screws 11 used by the existing loose lining composite board are large in size, and the protruding parts cause unnecessary waste of materials. More importantly, the connection between the existing screws 11 and the rare metal cladding 4 adopts fillet welds 9, and the force-bearing performance of this weld 9 form is relatively poor. Summary of the invention

[0005] The embodiments of the present application solve the problems in the prior art of the loose lining composite plate that the composite layer is easy to fall off, the stress bearing performance is relatively poor, and there are protrusions on the surface of the loose lining structure by providing a highly stable welded full-plane special material composite plate loose lining structure and a processing method thereof.

[0006] In order to achieve the above-mentioned object, an embodiment of the present invention provides a highly stable welded full-plane special material composite plate loose lining structure, including a base layer, a composite layer and fastening screws; The base layer is provided with a plurality of docking grooves, and the centers of the docking grooves are provided with screw holes; The composite layer is provided with a fixing hole matched with the screw hole, and the composite layer is provided with a flange structure at the hole edge of the fixing hole; The composite layer is arranged on the base layer, and the fastening screw passes through the fixing hole and is screwed into the screw hole; An abutment ring is arranged circumferentially on the lower part of the screw head of the fastening screw. The abutment ring and the flange structure are both located in the docking groove. The upper part of the flange structure and the upper part of the screw head are connected by welding.

[0007] In a possible implementation, a step surface is formed between the docking groove and the screw hole, the lower end of the flange structure is close to or abuts against the step surface, and the flange structure is clamped between the side wall of the abutment ring and the side wall of the docking groove.

[0008] In a possible implementation, a step surface is formed between the docking groove and the screw hole; The flange structure comprises a connected annular body and annular surface, the annular body is a cylindrical structure, the annular surface is a plane, and one side of the cross section of the flange structure is an L-shaped structure; The annular body is clamped between the side wall of the abutting ring and the side wall of the docking groove, and the annular surface is clamped between the bottom wall of the abutting ring and the step surface.

[0009] In a possible implementation manner, the composite layer and the fastening screw are made of the same material, and the composite layer and the fastening screw are made of stainless steel, titanium, tantalum, niobium, zirconium, nickel, aluminum, copper or an alloy thereof.

[0010] In a possible implementation manner, the corrosion resistance of the fastening screw is stronger than the corrosion resistance of the composite layer.

[0011] In one possible implementation, a gasket with an annular structure is provided in the docking groove, the gasket and the composite layer are made of the same material, the cross-section of one side of the gasket is an L-shaped structure, and the side wall and bottom surface of the gasket are respectively abutted against the side wall and step surface of the docking groove.

[0012] The embodiment of the present invention also provides a method for processing a high-stability welded full-plane special material composite plate loose lining structure, using the above-mentioned high-stability welded full-plane special material composite plate loose lining structure, comprising the following steps: Place the composite layer on the base layer so that the flange structure is snapped into the docking groove; Pass the fastening screw through the fixing hole and screw it into the screw hole, so that the flange structure is clamped between the abutment ring and the docking groove, and then the upper circumference of the flange structure and the upper circumference of the screw head are connected by welding; After welding is completed, the weld is polished to make the screw head, weld and cladding form a flat surface.

[0013] In a possible implementation, the number and spacing of the butt joint grooves are set according to the negative pressure that the rare metal composite plate needs to withstand.

[0014] In a possible implementation, the flange structure is processed by stamping, and arc chamfers are formed at the corners of the flange structure.

[0015] In a possible implementation, when the fastening screw is screwed into the screw hole, thread glue is injected between the fastening screw and the screw hole.

[0016] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: The embodiment of the present invention provides a high-stability welded full-plane special material composite plate loose lining structure and a processing method thereof. The surface of the rare metal composite plate processed by the present invention is flat, which improves the application range of the loose lining composite plate. When the loose lining composite plate of the present invention is subjected to negative pressure on one side of the rare metal, the structure is firm and not easy to fall off. The present invention optimizes the screw head structure, which not only achieves the purpose of flat surface of the rare metal composite plate, but also reduces the volume of the screw head, thereby saving materials and reducing the cost of the composite plate. The weld of the present invention has higher strength than the fillet weld of the prior art. Moreover, the present invention has high processing efficiency and can meet the needs of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of a highly stable welded full-plane special material composite plate loose lining structure provided in Example 1 of the present invention.

[0019] Figure 2 A schematic diagram of the local structure of a base layer provided in an embodiment of the present invention.

[0020] Figure 3 A schematic diagram of the local structure of a multi-layer provided in an embodiment of the present invention.

[0021] Figure 4 A schematic structural diagram of a fastening screw provided in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of a highly stable welded full-plane special material composite plate loose lining structure provided in Example 2 of the present invention.

[0023] Figure 6 This is a schematic diagram of a highly stable welded full-plane special material composite plate loose lining structure provided in Example 3 of the present invention.

[0024] Figure 7It is a schematic diagram of the loose lining structure of rare metal composite plate in the prior art.

[0025] Figure numerals: 1-base layer; 2-jointing groove; 3-screw hole; 4-composite layer; 5-fixing hole; 6-flanged structure; 61-annular body; 62-annular surface; 7-fastening screw; 8-abutment ring; 9-weld; 10-step surface; 11-existing screw; 12-washer ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0028] like Figures 1 to 6 As shown, the highly stable welded full-plane special material composite plate loose lining structure provided by the embodiment of the present invention includes a base layer 1, a composite layer 4 and fastening screws 7.

[0029] A plurality of docking grooves 2 are arranged on the base layer 1 , and a screw hole 3 is arranged at the center of the docking groove 2 .

[0030] The composite layer 4 is provided with a fixing hole 5 matched with the screw hole 3 , and the composite layer 4 is provided with a flange structure 6 at the hole edge of the fixing hole 5 .

[0031] The composite layer 4 is arranged on the base layer 1 , and the fastening screws 7 pass through the fixing holes 5 and are screwed into the screw holes 3 .

[0032] An abutment ring 8 is provided circumferentially below the screw head of the fastening screw 7. The abutment ring 8 and the flange structure 6 are both located in the docking groove 2. The upper part of the flange structure 6 and the upper part of the screw head are connected by welding.

[0033] It should be noted that the flange structure 6 and the docking groove 2 are interference fits, and the flange structure 6 and the abutment ring 8 are interference fits. The connection between the composite layer 4 and the base layer 1 of the present invention not only relies on the threaded connection method of the fastening screw 7, but also relies on the friction between the flange structure 6 and the docking groove 2 and the flange structure 6 and the abutment ring 8, thereby making the reliability of the loose lining of the rare metal composite plate higher under negative pressure. An annular groove body is formed between the upper part of the flange structure 6 and the upper part of the screw head, which facilitates welding. After welding, the screw head is well stressed and has higher reliability. This structure can also reduce the weight of the rare metal screw, thereby reducing the cost.

[0034] In this embodiment, a step surface 10 is formed between the docking groove 2 and the screw hole 3 , the lower end of the flange structure 6 is close to or abuts against the step surface 10 , and the flange structure 6 is clamped between the side wall of the abutting ring 8 and the side wall of the docking groove 2 .

[0035] It should be noted that the flange structure 6 is formed by stamping, and the flange structure 6 has an arc transition at the corner, and the arc transition can just be used as a welding groove, which increases the welding width and depth and improves the welding firmness.

[0036] In this embodiment, a step surface 10 is formed between the butt joint groove 2 and the screw hole 3 .

[0037] The flange structure 6 includes a circular ring body 61 and a circular ring surface 62 which are connected to each other. The circular ring body 61 is a cylindrical structure, the circular ring surface 62 is a plane, and one side of the cross section of the flange structure 6 is an L-shaped structure.

[0038] The annular body 61 is clamped between the side wall of the abutting ring 8 and the side wall of the docking groove 2 , and the annular surface 62 is clamped between the bottom wall of the abutting ring 8 and the step surface 10 .

[0039] It should be noted that the annular surface 62 of the flange structure 6 of the present embodiment is clamped between the bottom wall of the abutment ring 8 and the step surface 10, thereby further fixing the composite layer 4 and the base layer 1, thereby improving the fixing effect. In this embodiment, the composite layer 4 and the fastening screw 7 are made of the same material, which is stainless steel, titanium, tantalum, niobium, zirconium, nickel, aluminum, copper or alloys thereof.

[0040] It should be noted that the composite layer 4 and the fastening screw 7 are made of the same material, and the same material has good weldability and consistent corrosion resistance.

[0041] In this embodiment, the corrosion resistance of the fastening screw 7 is stronger than that of the composite layer 4 .

[0042] It should be noted that when the loose lining structure of the rare metal composite plate is in use, the fastening screw 7 is just at the position of the sealing gasket (the sealing gasket is a component that cooperates with the fastening screw 7 when the rare metal composite plate is in use), which is prone to gap corrosion. In this case, the fastening screw 7 needs to be made of some more corrosion-resistant materials to improve the reliability of equipment use.

[0043] The material of the composite layer 4 can also be TA2, and the material of the fastening screw 7 can be TA9, TA10 or TA2.

[0044] In this embodiment, a ring-shaped gasket 12 is provided in the docking groove 2. The gasket 12 is made of the same material as the composite layer 4. The cross-section of one side of the gasket 12 is an L-shaped structure. The side wall and bottom surface of the gasket 12 are respectively abutted against the side wall and step surface 10 of the docking groove 2.

[0045] It should be noted that the rare metal composite layer 4 usually has a high melting point. For example, when the material of the composite layer 4 is tantalum, a large current is required during welding, so it is easy to weld through the composite layer 4 during welding. Therefore, a gasket ring 12 of the same material is arranged on the contact surface of the base layer 1 to protect the composite layer 4, thereby playing a role in heat dissipation and preventing the composite layer 4 from being welded through.

[0046] like Figures 1 to 6 As shown, the processing method of the high-stability welded full-plane special material composite plate loose lining structure provided by the embodiment of the present invention adopts the above-mentioned high-stability welded full-plane special material composite plate loose lining structure, and includes the following steps: The composite layer 4 is placed on the base layer 1 , so that the flange structure 6 is snap-fitted into the docking groove 2 .

[0047] The fastening screw 7 is passed through the fixing hole 5 and then screwed into the screw hole 3, so that the flange structure 6 is clamped between the abutment ring 8 and the docking groove 2, and then the upper circumference of the flange structure 6 and the upper circumference of the screw head are connected by welding.

[0048] After welding is completed, the weld 9 is ground so that the screw head, the weld 9 and the composite layer 4 form a flat surface.

[0049] It should be noted that the surface of the rare metal composite plate processed by the present invention is smooth, which improves the application range of the loose lining composite plate. When the loose lining composite plate of the present invention is subjected to negative pressure on one side of the rare metal, the structure is firm and not easy to fall off. The present invention optimizes the screw head structure, which not only achieves the purpose of smooth surface of the rare metal composite plate, but also reduces the volume of the screw head, thereby saving materials and reducing the cost of the composite plate. The weld 9 of the present invention has better strength than the fillet weld of the prior art. Moreover, the present invention has high processing efficiency and can meet the needs of mass production.

[0050] In this embodiment, the number and spacing of the butt joint grooves 2 are set according to the negative pressure that the rare metal composite plate needs to withstand.

[0051] It should be noted that, when setting, the greater the negative pressure, the greater the number of docking grooves 2, and the smaller the spacing between the docking grooves 2, so as to correspond to the same number of fastening screws 7 to meet the negative pressure requirements. For example, when one square meter of rare metal composite board is subjected to a negative pressure of 0.01 MPa, ten fastening screws 7 can be evenly set. When the negative pressure becomes larger, when one square meter of rare metal composite board is subjected to a negative pressure of 0.1 MPa, twenty fastening screws 7 can be evenly set.

[0052] In this embodiment, the flange structure 6 is processed by stamping, and arc chamfers are formed at the corners of the flange structure 6 .

[0053] It should be noted that the punching method is easy to process and makes the flange structure 6 and the composite layer 4 an integrated structure. Because the structural strength is higher, it is also easy to form an arc chamfer structure.

[0054] In this embodiment, when the fastening screw 7 is screwed into the screw hole 3 , thread glue is injected between the fastening screw 7 and the screw hole 3 .

[0055] It should be noted that thread glue can further increase the firmness of threaded connections.

[0056] In this embodiment, it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A highly stable welded full-plane special material composite plate loose lining structure, characterized by: It comprises a base layer (1), a composite layer (4) and a fastening screw (7); The base layer (1) is provided with a plurality of docking grooves (2), and the center of each docking groove (2) is provided with a screw hole (3); The composite layer (4) is provided with a fixing hole (5) matching with the screw hole (3), and the composite layer (4) is provided with a flange structure (6) at the edge of the fixing hole (5); The composite layer (4) is arranged on the base layer (1), and the fastening screw (7) passes through the fixing hole (5) and is screwed into the screw hole (3); An abutment ring (8) is provided circumferentially below the screw head of the fastening screw (7); the abutment ring (8) and the flange structure (6) are both located in the docking groove (2); and the upper part of the flange structure (6) and the upper part of the screw head are connected by welding.

2. The high stability welded full-plane special material composite plate loose lining structure according to claim 1 is characterized by: A step surface (10) is formed between the docking groove (2) and the screw hole (3), the lower end of the flange structure (6) is close to or abuts against the step surface (10), and the flange structure (6) is clamped between the side wall of the abutment ring (8) and the side wall of the docking groove (2).

3. The high stability welded full-plane special material composite plate loose lining structure according to claim 1 is characterized by: A step surface (10) is formed between the docking groove (2) and the screw hole (3); The flange structure (6) comprises a circular ring body (61) and a circular ring surface (62) connected to each other, the circular ring body (61) is a cylindrical structure, the circular ring surface (62) is a plane, and one side of the cross section of the flange structure (6) is an L-shaped structure; The annular body (61) is clamped between the side wall of the abutment ring (8) and the side wall of the docking groove (2), and the annular surface (62) is clamped between the bottom wall of the abutment ring (8) and the step surface (10).

4. The high stability welded full-plane special material composite plate loose lining structure according to claim 1 is characterized by: The composite layer (4) and the fastening screw (7) are made of the same material, and the composite layer (4) and the fastening screw (7) are made of stainless steel, titanium, tantalum, niobium, zirconium, nickel, aluminum, copper or alloys thereof.

5. The high stability welded full-plane special material composite plate loose lining structure according to claim 1 is characterized by: The corrosion resistance of the fastening screw (7) is stronger than the corrosion resistance of the composite layer (4).

6. The high stability welded full-plane special material composite plate loose lining structure according to claim 2 is characterized by: A gasket ring (12) of an annular structure is arranged in the docking groove (2); the gasket ring (12) and the composite layer (4) are made of the same material; a cross-section of one side of the gasket ring (12) is an L-shaped structure; the side wall and bottom surface of the gasket ring (12) are respectively in contact with the side wall and step surface (10) of the docking groove (2).

7. A method for processing a high-stability welded full-plane special material composite plate loose lining structure, characterized in that: The high-stability welded full-plane special material composite plate loose lining structure as claimed in any one of claims 1 to 6 comprises the following steps: Placing the composite layer (4) on the base layer (1) so that the flange structure (6) is snap-fitted into the docking groove (2); Passing the fastening screw (7) through the fixing hole (5) and screwing it into the screw hole (3), the flange structure (6) is clamped between the abutment ring (8) and the docking groove (2), and then the upper circumference of the flange structure (6) and the upper circumference of the screw head are connected by welding; After welding is completed, the weld (9) is polished so that the screw head, the weld (9) and the composite layer (4) form a flat surface.

8. The method for processing the high-stability welded full-plane special material composite plate loose lining structure according to claim 7 is characterized in that: The number and spacing of the butt joint grooves (2) are set according to the magnitude of the negative pressure that the rare metal composite plate needs to withstand.

9. The method for processing the high-stability welded full-plane special material composite plate loose lining structure according to claim 7, characterized in that: The flange structure (6) is processed by punching, and arc chamfers are formed at the corners of the flange structure (6).

10. The method for processing the high-stability welded full-plane special material composite plate loose lining structure according to claim 7, characterized in that: When screwing the fastening screw (7) into the screw hole (3), inject thread glue between the fastening screw (7) and the screw hole (3).

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