Split-type tooling and method for the constriction structure in narrow-mouth, deep-cavity rotary bodies

Abstract

This invention discloses a split-type tooling and assembly method for the closing structure in a narrow-mouth, deep-cavity rotating body, including a pressing part and a supporting part. The pressing part includes a pressure rod and a split-type closing tooling for pressing the closing structure of the component. The supporting part includes an assembly support and a pressing support. The assembly support facilitates the assembly of the split-type closing tooling into place, while the pressing support ensures the positioning and pressing accuracy of the closing structure of the part during the pressing process. This invention solves the problem of the inability to close the closing structure in a narrow-mouth, deep-cavity rotating body of an aerospace valve automatic device due to space constraints, achieving precise pressing of the closing structure in such a body, ensuring product assembly accuracy, and improving assembly efficiency.

Description

Technical Field

[0001] This invention belongs to the field of parts assembly technology, and relates to a tooling and assembly method for assembling narrow-mouth deep-cavity rotating bodies. Background Technology

[0002] In the valve structure of liquid rocket engines, there are often parts that are press-fitted with interference fit. After press-fitting, these parts often need to be narrowed to limit their movement, thereby achieving a fixed assembly between the parts and ensuring the reliability and stability of the interference fit.

[0003] Currently, there are two common solutions for closing the edges of parts: one is to use machining, such as roller cutting tools, to close the edges; the other is to use press fitting, which involves designing a fixture that complements the closing angle. However, for narrow-mouth, deep-cavity rotating bodies where the closing size is larger than the entry size, due to structural size limitations, neither mechanical roller cutting tools nor traditional press fitting fixtures can reach into the product, making it impossible to limit the closing of parts and ensure the assembly accuracy of each part. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the shortcomings of the prior art, the present invention provides a split tooling and assembly method for the closing structure in a narrow-mouth deep-cavity rotating body, which solves the problem that the closing structure in a narrow-mouth deep-cavity rotating body of aerospace valve automatic device is unable to close due to limited space, realizes the precise press-fitting of the closing structure in the narrow-mouth deep-cavity rotating body, ensures assembly accuracy, and improves assembly efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a split tooling for the closing structure in a narrow-mouth deep-cavity rotating body, comprising a pressing part and a supporting part;

[0006] The pressing part includes a pressure rod and a split-type closing fixture; the outer wall surface of the split-type closing fixture includes a conical section and cylindrical sections on both sides of the conical section, and the split-type closing fixture is divided into several segments in the circumferential direction.

[0007] The supporting part includes an assembly support and a press-fit support; the assembly support is used to support the split-type closing tooling during the split assembly process; the press-fit support is used to support the closing structure of the split-type closing tooling during the closing process.

[0008] Furthermore, the number of segments of the split-type closing tool is determined according to the inner cavity size of the narrow-mouth deep-cavity rotating body.

[0009] Furthermore, the angle of the inclined side of the conical section of the split-type closing tool is determined according to the angle requirements of the inner wall of the closing structure.

[0010] Furthermore, the press-fit support includes a threaded section and cylindrical sections at both ends of the threaded section. The diameters of the threaded section and the cylindrical sections at both ends of the threaded section are different. The threaded section is installed in conjunction with the large end port of the narrow-mouth deep-cavity rotating body. The small end diameter of the press-fit support is larger than the outer diameter of the closing structure.

[0011] Furthermore, the assembly support includes a threaded section and cylindrical sections at both ends of the threaded section. The diameters of the threaded section and the cylindrical sections at both ends of the threaded section are different. The threaded section is installed in conjunction with the large end port of the narrow-mouth deep-cavity rotating body. The small end diameter of the assembly support is the same as the inner diameter of the closing structure.

[0012] The machining method using the split-type tooling for the constriction structure in a narrow-mouth deep-cavity rotating body includes:

[0013] The constriction structure is installed into the narrow-mouth deep-cavity rotating body, and the assembly support is installed from the large end of the narrow-mouth deep-cavity rotating body into the narrow-mouth deep-cavity rotating body, so that the end of the assembly support is inserted into the constriction structure.

[0014] Place the split-type sealing tooling into the corresponding part of the narrow-mouth deep-cavity rotating body through the opening on the side of the body;

[0015] Remove the assembly support from the narrow-mouth deep-cavity rotating body and replace it with a press-fit support;

[0016] A pressure rod is inserted into the small end of the narrow-mouth deep-cavity rotating body. Pressure is applied to the pressure rod using a pressure device, which pushes the split-type closing fixture to close and press the closing structure.

[0017] Furthermore, multiple sealing press-fitting processes are performed using separate sealing fixtures with different bevel angles.

[0018] The advantages of this invention compared to the prior art are:

[0019] (1) The split tooling of the present invention has a wide range of applications and can be used for the assembly of most narrow-mouth deep-cavity rotating bodies with a constricted structure. It has good quality stability and consistency, and improves the reliability of the product.

[0020] (2) The split tooling of the present invention is practical, economical, compact and convenient, and solves the problem that the space of the closing structure in the narrow-mouth deep cavity type rotary body is limited and cannot be closed, thus improving the assembly efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the assembly of the split-type sealing tooling of the present invention;

[0022] Figure 2 This is a schematic diagram of the split-type sealing tool of the present invention.

[0023] Figure 3This is a structural diagram of style one of the split-type sealing tooling;

[0024] Figure 4 This is a structural diagram of style two of the split-type sealing tooling;

[0025] In the figure: 1. Narrow-mouth deep-cavity rotating body, 2. Pressure rod, 3. Split-type closing tooling, 4. Closing structure parts, 5. Assembly support, 6. Press-fit support. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings and technical solutions.

[0027] like Figure 1 and Figure 2 As shown, a split-type tooling for a closing structure 4 in a narrow-mouth deep-cavity rotating body 1 includes a pressing part and a supporting part; the pressing part includes a pressure rod 2 and a split-type closing tooling 3; the split-type closing tooling 3 directly presses the closing structure using a forming method; the supporting part includes an assembly support 5 and a pressing support 6; the assembly support 5 is used to support the split-type closing tooling 3 during the split assembly process; the pressing support 6 is used to support the split-type closing tooling 3 during the closing process, ensuring the dimensional accuracy of the closing structure; the closing structure 4 is a ring structure.

[0028] The number of the split-type closing tool 3 is determined according to the internal cavity size design of the narrow-mouth deep-cavity rotary body 1.

[0029] The angle of the inclined side of the split-type closing tool 3 is determined according to the angle requirements of the closing structure in the narrow-mouth deep-cavity rotary body 1;

[0030] The press-fit support 6 includes a threaded section and cylindrical sections at both ends of the threaded section. The diameters of the threaded section and the cylindrical sections at both ends of the threaded section are different. The threaded section is installed in conjunction with the large end port of the narrow-mouth deep-cavity rotating body 1. The small end diameter of the press-fit support 6 is larger than the outer diameter of the closing structure 4.

[0031] The assembly support 5 includes a threaded section and cylindrical sections at both ends of the threaded section. The diameters of the threaded section and the cylindrical sections at both ends of the threaded section are different. The threaded section is installed in conjunction with the large end port of the narrow-mouth deep-cavity rotating body 1. The small end diameter of the assembly support 5 is the same as the inner diameter of the closing structure 4.

[0032] like Figure 3 and Figure 4 As shown, the split-type sealing tool 3 can be designed with different bevel angles and shapes.

[0033] The specific assembly steps are as follows:

[0034] Step 1: Insert the closing structure 4 into the narrow-mouth deep-cavity rotating body 1, and insert the assembly support 5 into the narrow-mouth deep-cavity rotating body 1 from the large end of the narrow-mouth deep-cavity rotating body 1. Insert the end of the assembly support 5 into the closing structure 4.

[0035] Step 2: Using tools, place the split-type closing fixture 3 from the side opening onto the corresponding closing structure part 4 of the narrow-mouth deep-cavity rotating body 1.

[0036] Step 3: Remove the assembly support 5 from the narrow-mouth deep-cavity rotating body 1 and replace it with the press-fit support 6.

[0037] Step 4: Insert the pressure rod 2 into the small end of the narrow-mouth deep-cavity rotating body 1, and use the pressure device to press and close the closing structure of the narrow-mouth deep-cavity rotating body 1.

[0038] To ensure the quality of the closing, a split-type closing fixture 3 with different bevel angles can be used to perform step-by-step closing and pressing of the closing structure of the narrow-mouth deep-cavity rotating body 1.

[0039] This invention is not limited to this embodiment. Any equivalent concept or modification within the technical scope disclosed in this invention shall be included within the protection scope of this invention.

Claims

1. A split-type tooling for the constriction structure in a narrow-mouth, deep-cavity rotating body, characterized in that, Includes the press-fitting part and the supporting part; The pressing part includes a pressure rod (2) and a split-type closing tool (3); the outer wall surface of the split-type closing tool (3) includes a conical section and cylindrical sections on both sides of the conical section, and the split-type closing tool (3) is divided into several segments in the circumferential direction. The supporting part includes an assembly support (5) and a press-fit support (6); the assembly support (5) is used to support the split-type closing tool (3) during the split assembly process; the press-fit support (6) is used to support the closing structure (4) during the closing process of the split-type closing tool (3).

2. A split-type tooling for a narrow-mouth, deep-cavity rotating body with a tapering structure according to claim 1, characterized in that, The number of segments of the split-type closing tool (3) is determined according to the inner cavity size of the narrow-mouth deep-cavity rotary body (1).

3. A split-type tooling for a narrow-mouth, deep-cavity rotating body with a tapering structure according to claim 1, characterized in that, The angle of the conical section of the split-type closing tool (3) is determined according to the angle requirements of the inner wall of the closing structure (4).

4. A split-type tooling for a constriction structure in a narrow-mouth, deep-cavity rotating body according to claim 1, characterized in that, The press-fit support (6) includes a threaded section and cylindrical sections at both ends of the threaded section. The diameters of the threaded section and the cylindrical sections at both ends of the threaded section are different. The threaded section is installed in conjunction with the large end port of the narrow-mouth deep-cavity rotating body (1). The small end diameter of the press-fit support (6) is larger than the outer diameter of the closing structure (4).

5. A split-type tooling for a constriction structure in a narrow-mouth, deep-cavity rotating body according to claim 1, characterized in that, The assembly support (5) includes a threaded section and cylindrical sections at both ends of the threaded section. The diameters of the threaded section and the cylindrical sections at both ends of the threaded section are different. The threaded section is installed in conjunction with the large end port of the narrow-mouth deep-cavity rotating body (1). The small end diameter of the assembly support (5) is the same as the inner diameter of the closing structure (4).

6. A machining method using a split-type tooling for the constriction structure in a narrow-mouth, deep-cavity rotating body as described in any one of claims 1 to 5, characterized in that, include: Insert the closing structure (4) into the narrow-mouth deep-cavity rotating body (1), and insert the assembly support (5) from the large end of the narrow-mouth deep-cavity rotating body (1) into the narrow-mouth deep-cavity rotating body (1), so that the end of the assembly support (5) is inserted into the closing structure (4). Place the split-type closing tool (3) into the corresponding part of the narrow-mouth deep-cavity rotating body (1) through the opening on the side of the body; Remove the assembly support (5) from the narrow-mouth deep-cavity rotating body (1) and replace it with a press-fit support (6). Insert the pressure rod (2) into the small end of the narrow-mouth deep-cavity rotating body (1), apply pressure to the pressure rod (2) using a pressure device, and push the split-type closing tool (3) to close and press the closing structure (4).

7. The processing method according to claim 6, characterized in that, Multiple sealing presses are performed using split-type sealing fixtures (3) with different bevel angles.

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