Composite profiled body of revolution and method for manufacturing same

Abstract

The application discloses a composite special-shaped rotary body and a manufacturing method thereof, comprising a first ring body and a second ring body, both sides of the first ring body are provided with first lap joints, both sides of the second ring body are provided with second lap joints, the first ring body is connected with the second ring body through the first lap joints and the second lap joints, and an adhesive layer is further arranged between the first lap joints and the second lap joints; the application further discloses a related manufacturing method, firstly, the rotary body is split, corresponding lap joints are arranged, each ring body is manufactured according to the split numerical model, then each ring body is spliced with each other, and finally, the spliced rotary body is sealed in a vacuum bag for solidification; the manufacturing of the rotary body component is realized through the splitting and re-bonding mode, after the rotary body is disassembled, each ring body is manufactured through the glue joint layer design and other modes, so that the manufacturing of the rotary body no longer needs to design and manufacture an integral forming tool, which is not only favorable for reducing the manufacturing cost of the rotary body, but also favorable for improving the processing efficiency.

Description

Technical Field

[0001] This application relates to the field of rotary body manufacturing technology, specifically to a composite material irregular rotary body and its manufacturing method. Background Technology

[0002] Composite materials, with their significant advantages such as high specific strength and modulus, strong designability, good fatigue resistance, excellent corrosion resistance, and ease of integral molding, have been widely used in the aerospace field. Currently, there are three main methods for manufacturing irregularly shaped small-diameter rotating bodies: 1. Using a water-soluble mandrel, forming the small-diameter rotating body on the mandrel, and then dissolving the mandrel; 2. Using steel tooling, with a segmented, core-removable design, forming the small-diameter rotating body on the tooling, and then sequentially removing the segmented tooling; 3. Using foam tooling, forming on the foam tooling, and then removing the foam from the small-diameter rotating body.

[0003] However, the above methods not only result in high tooling manufacturing costs and manufacturing difficulties for small-diameter rotary bodies, but also make it easy for mold separation to damage the surface quality of the rotary body, resulting in poor molding quality that cannot meet the usage requirements. Summary of the Invention

[0004] The main objective of this application is to provide a composite material irregular rotating body and its manufacturing method, aiming to solve the defects of poor molding quality in the prior art.

[0005] The present invention achieves the above objectives through the following technical solutions;

[0006] A composite material irregular rotating body includes a first ring body, and a first overlapping joint is provided on both sides of the first ring body;

[0007] The second ring body has a second overlapping joint on both sides, and the two second overlapping joints are respectively connected to the two first overlapping joints.

[0008] An adhesive layer is disposed between the second overlap joint and the first overlap joint.

[0009] Optionally, both the first lap joint and the second lap joint have a stepped cross-section.

[0010] Optionally, the irregularly shaped rotating body also includes a transition layer, which is disposed in the splicing area between the first overlap joint and the second overlap joint to achieve a smooth transition of the splicing area.

[0011] Optionally, the transition layer comprises several layers of prepreg stacked sequentially, with the width of each prepreg decreasing linearly from bottom to top.

[0012] Optionally, the rotating body is also provided with an isolation membrane, an air-guiding felt, and a rubber plate, wherein the rubber plate covers the seam area of ​​the first overlap joint and the second overlap joint; the isolation membrane covers the rubber plate, and the air-guiding felt is laid on the surface of the isolation membrane.

[0013] Optionally, the first ring body and the second ring body are further provided with mutually cooperating positioning ears, and the positioning ears are provided with positioning holes.

[0014] Accordingly, this application also discloses a method for manufacturing the aforementioned irregularly shaped rotating body, including the following steps:

[0015] Select the splitting point based on the digital model of the irregular rotating body;

[0016] Set a first lap joint and a second lap joint at the split point to generate a first annular digital model and a second annular digital model;

[0017] The first ring body and the second ring body are manufactured according to the first ring body digital model and the second ring body digital model;

[0018] Connect the first ring body to the second ring;

[0019] The first and second rings, after being spliced ​​together, are sealed in a vacuum bag and cured according to the curing conditions of the adhesive layer.

[0020] Optionally, splicing the first ring body and the second ring includes the following steps:

[0021] An adhesive layer is laid on each of the first or second lap joints;

[0022] The first ring body and the second ring body are spliced ​​together by the first joint and the second joint, and the positioning pin is installed;

[0023] Rubber sheets are laid on the seam areas on the inner and outer sides of the first ring body and the second ring body, respectively;

[0024] An isolation membrane and an air-conducting felt are laid on the two rubber sheets respectively.

[0025] Optionally, the rubber sheet extends 15-25mm beyond the edge of the seam area on both sides; the isolation membrane extends 10-15mm beyond the edge of the rubber sheet on both sides; and the air-guiding felt extends 10-15mm beyond the edge of the isolation membrane on both sides.

[0026] Optionally, a glue leakage gap is provided in the splicing area of ​​the first joint and the second joint, and the width of the glue leakage gap is 2-4mm.

[0027] Compared with the prior art, this application has the following beneficial effects:

[0028] The irregular rotating body described in this application includes a first ring body and a second ring body. The first ring body is provided with a first overlapping joint on both sides, and the second ring body is also provided with a second overlapping joint on both sides. The first ring body and the second ring body are connected by overlapping joints of the first overlapping joints and the second overlapping joints. An adhesive layer is also provided between the first overlapping joints and the second overlapping joints.

[0029] Accordingly, this application also discloses a method for manufacturing the above-mentioned rotating body. First, the rotating body is disassembled and corresponding overlapping joints are set. Then, each ring is manufactured according to the disassembled digital model. Then, each ring is spliced ​​together with the others. Finally, the spliced ​​rotating body is sealed in a vacuum bag for curing.

[0030] Compared with the prior art, this application realizes the manufacturing of the rotating body component by disassembling and re-gluing. After the rotating body is disassembled, each ring can be manufactured separately through adhesive layup design and other methods. Therefore, the manufacturing of the rotating body no longer requires the design and manufacture of integral molding tooling, which not only helps to reduce the manufacturing cost of the rotating body, but also helps to improve processing efficiency.

[0031] Secondly, since there is no need to set up an integral molding tooling, there is no need to demold during the production process. Therefore, the adverse effects on the surface quality of the rotating body are fundamentally avoided, and the molding quality of the rotating body is improved.

[0032] Finally, since each ring is manufactured separately, the difficulty of quality control is reduced, which can effectively avoid the occurrence of quality defects such as limiting wrinkles, and is conducive to improving the dimensional surface quality and dimensional accuracy of the rotating body. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a composite material irregular rotating body provided in Embodiment 1 of this application;

[0034] Figure 2 This is a side view of a composite material irregular rotating body provided in Embodiment 1 of this application;

[0035] Figure 3 for Figure 1 Enlarged view of section A in the middle;

[0036] Figure 4 A flowchart illustrating a method for manufacturing a composite material irregular rotating body according to Embodiment 1 of this application;

[0037] Reference numerals: 1-First ring body, 2-First overlapping joint, 3-Second ring body, 4-Second overlapping joint, 5-Adhesive layer, 6-Transition layer, 7-Separation membrane, 8-Air guiding felt, 9-Rubber plate, 10-Positioning ear, 11-Positioning hole.

[0038] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0043] Implementation Method 1

[0044] Reference Figure 1 and Figure 3This embodiment, as an optional implementation of this application, discloses a composite material irregular rotating body, including a first rotating body and a second rotating body. The first rotating body has a first overlapping joint 2 at both ends, and the second rotating body has a second overlapping joint 4 at both ends. Both the first overlapping joint 2 and the second overlapping joint 4 have a stepped structure. The notched side of the first overlapping joint 2 is located on the inner side, and the notched side of the second overlapping joint 4 is located on the outer side. This arrangement enables the first overlapping joint 2 and the second overlapping joint 4 to interlock and splice. Simultaneously, the stepped structure reduces the thickness at the overlapping area, decreasing the amount of subsequent grinding and thus ensuring the overall molding quality of the rotating body.

[0045] It should be noted that the notch settings of the first lap joint 2 and the second lap joint 4 can be interchanged, as long as one notch is located on the inside and the other notch is located on the outside, and the notch positions of the lap joints that overlap are reversed; at the same time, the rotating body can also be divided into 3, 4 or more rings, and the specific number can be determined according to the specific structure of the rotating body parts.

[0046] An adhesive layer 5 is also provided on the overlapping surface of the first overlapping joint 2 or the second overlapping joint 4. The adhesive layer 5 is an adhesive layer. After overlapping, the two sides of the adhesive layer 5 are respectively connected to the overlapping surfaces of the first overlapping joint 2 and the second overlapping joint 4, thereby realizing the bonding of the first overlapping joint 2 and the second overlapping joint 4.

[0047] The irregularly shaped rotating body also includes a transition layer 6, which is disposed in the splicing area of ​​the first overlapping joint 2 and the second overlapping joint 4 to achieve a smooth transition in the splicing area. The transition layer 6 includes a plurality of prepregs, which are stacked on top of each other along the vertical direction of the overlapping area of ​​the first overlapping joint 2 and the second overlapping joint 4. At the same time, the width of each prepreg decreases linearly from bottom to top to form a triangular cross section, which fills the boss formed by the adhesive layer 5, thereby achieving a smooth transition in the overlapping area, ensuring that the thickness of the entire rotating body is uniform and improving the molding quality.

[0048] Meanwhile, the rotating body is also provided with an isolation membrane 7, an air-guiding felt 8 and a rubber plate 9. The rubber plate 9 covers the seam area between the first overlap joint 2 and the second overlap joint 4; the isolation membrane 7 covers the rubber plate 9; and the air-guiding felt 8 is laid on the surface of the isolation membrane 7.

[0049] The above settings can better cover the bonded areas and provide sufficient sanding material after final curing.

[0050] The first ring body 1 and the second ring body 3 are also provided with mutually cooperating positioning lugs 10. The positioning lugs 10 are provided with positioning holes 11. After the first ring body 1 and the second ring body 3 are spliced ​​together, the two positioning holes 11 are connected in series by positioning pins. This can not only effectively improve the connection strength between the first ring body 1 and the second ring body 3, but also realize the docking efficiency and docking accuracy of the first ring body 1 and the second ring body 3. Moreover, it is easy to operate and has a simple structure.

[0051] Implementation Method 2

[0052] Reference Figure 4 This embodiment, as an optional embodiment of this application, discloses a method for manufacturing a composite material irregular rotating body, including the following steps:

[0053] S1. Select the splitting point based on the digital model of the irregularly shaped rotating body;

[0054] Obtain a digital model of the irregularly shaped rotating body, and select a splitting point on the digital model. The splitting point should be a region with a gentle change in curvature or a flat area. This reduces the difficulty of splicing and also enables the region with a large change in curvature to be formed on the same ring body in one step, which is beneficial to improving the forming quality of the rotating body.

[0055] S2. Set the first lap joint and the second lap joint at the split point to generate the first ring body digital model and the second ring body digital model;

[0056] The rotating body is disassembled at the selected split point; then, digital models are generated for the first and second lap joints with a stepped structure based on the structural parameters of the rotating body, and finally, digital models of the first and second ring bodies are obtained.

[0057] S3. Manufacture the first ring body and the second ring body according to the first ring body digital model and the second ring body digital model;

[0058] S4. Connect the first ring body and the second ring;

[0059] S41. An adhesive layer is laid on each of the first lap joints or each of the second lap joints;

[0060] An adhesive layer is provided on either of the two sides of the first lap joint and the second lap joint that are directly opposite each other, and the adhesive layer is an adhesive.

[0061] It should be noted that, according to the requirements of adhesive strength, the width of the adhesive layer is greater than 10mm;

[0062] S42. The first ring body and the second ring body are spliced ​​together by the first overlapping joint and the second overlapping joint, and the positioning pin is installed;

[0063] After the adhesive layer is set, the first overlapping joint and the second overlapping joint are spliced ​​together according to the external structure of the rotating body. After splicing, the two sets of corresponding positioning holes should be coaxial and symmetrical. Then, the positioning holes are connected in series by positioning pins.

[0064] It should be noted that after the overlap is completed, the first overlap joint and the second overlap joint in the overlap direction are tightly attached to the upper and lower surfaces of the adhesive layer, respectively. In the direction perpendicular to the overlap direction, a gap for glue leakage is provided between the first overlap joint and the second overlap joint, and the width of the gap for glue leakage is 2-4mm.

[0065] Due to the setting of the glue leakage gap, during the process of the first overlap and the second overlap overlapping and pressing, the excess adhesive will seep from the glue leakage gap to the inner and outer surfaces of the rotating body, which is beneficial to improve the bonding surface. At the same time, the adhesive leaking through the glue leakage gap can also effectively improve the bonding strength of the transition layer.

[0066] After bonding is completed, a transition layer is laid directly above the gap in the missed detection.

[0067] Before laying the transition layer, the step difference formed by splicing the first or second lap joint needs to be detected. Based on the step difference and the table below, the structure of the transition layer is determined, and then the transition layer is laid in the corresponding area. One side of the transition layer abuts against the step formed by the first or second lap joint.

[0068] The number of prepreg layers and their corresponding dimensions in the transition layer are set according to the following table:

[0069]

[0070]

[0071] S43. Rubber sheets are laid on the seam areas on the inner and outer sides of the first ring body and the second ring body respectively.

[0072] After the transition layer is laid, rubber sheets are then laid on the joint areas on the inner and outer sides of the first ring and the second ring, respectively.

[0073] S44. Lay an isolation membrane and an air-guiding felt on the two rubber sheets respectively.

[0074] S5. The first ring body and the second ring body after splicing are sealed in a vacuum bag and cured according to the curing conditions of the adhesive layer.

[0075] It should be noted that after the first ring body and the second ring body are assembled and sealed in a vacuum bag, the vacuum bag needs to be evacuated first, and the vacuum degree needs to reach (-0.085~-0.1) MPa.

[0076] The vacuum bag is then placed in an autoclave, and a suitable temperature platform, isothermal time, and heating rate are selected according to the curing parameters of the adhesive to complete the curing process in the autoclave.

[0077] Compared with the prior art, this application realizes the manufacturing of the rotating body component by disassembling and re-gluing. After the rotating body is disassembled, each ring can be manufactured separately through adhesive layup design and other methods. Therefore, the manufacturing of the rotating body no longer requires the design and manufacture of integral molding tooling, which not only helps to reduce the manufacturing cost of the rotating body, but also helps to improve processing efficiency.

[0078] Secondly, since there is no need to set up an integral molding tooling, there is no need to demold during the production process. Therefore, the adverse effects on the surface quality of the rotating body are fundamentally avoided, and the molding quality of the rotating body is improved.

[0079] Finally, since each ring is manufactured separately, the difficulty of quality control is reduced, which can effectively avoid the occurrence of quality defects such as limiting wrinkles, and is conducive to improving the dimensional surface quality and dimensional accuracy of the rotating body.

[0080] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A composite material contoured spheroid, characterized by, It includes a first ring body (1), and a first overlapping joint (2) is provided on both sides of the first ring body (1); The second ring body (3) has a second overlapping joint (4) on both sides, and the two second overlapping joints (4) are respectively connected to the two first overlapping joints (2); An adhesive layer (5) is disposed between the second lap joint (4) and the first lap joint (2); The irregular rotating body also includes a transition layer (6), which is disposed in the splicing area of ​​the first overlap joint (2) and the second overlap joint (4) to achieve a smooth transition of the splicing area; the transition layer (6) includes several layers of prepreg stacked in sequence, and the width of each prepreg decreases linearly from bottom to top. The irregular rotating body is also provided with an isolation membrane (7), an air-guiding felt (8) and a rubber plate (9). The rubber plate (9) covers the seam area of ​​the first overlap joint (2) and the second overlap joint (4). The isolation membrane (7) covers the rubber plate (9), and the air-guiding felt (8) is laid on the surface of the isolation membrane (7). The first ring body (1) and the second ring body (3) are also provided with positioning ear pieces (10) that cooperate with each other, and the positioning ear pieces (10) are provided with positioning holes (11).

2. A composite material irregularly shaped body according to claim 1, characterized in that Both the first lap joint (2) and the second lap joint (4) have a stepped cross-section.

3. The method of claim 1 or 2, wherein Includes the following steps: Select the splitting point based on the digital model of the irregular rotating body; Set a first lap joint and a second lap joint at the split point to generate a first annular digital model and a second annular digital model; The first ring body and the second ring body are manufactured according to the first ring body digital model and the second ring body digital model; Connect the first ring body and the second ring body; The first and second rings, after being spliced ​​together, are sealed in a vacuum bag and cured according to the curing conditions of the adhesive layer.

4. The production method according to claim 3, characterized by The process of splicing the first ring body and the second ring body includes the following steps: An adhesive layer is laid on each of the first or second lap joints; The first ring body and the second ring body are spliced ​​together by the first joint and the second joint, and the positioning pin is installed; Rubber sheets are laid on the seam areas on the inner and outer sides of the first ring body and the second ring body, respectively; An isolation membrane and an air-conducting felt are laid on the two rubber sheets respectively.

5. The production method according to claim 3, wherein The rubber sheet extends 15-25mm beyond the edge of the seam area on both sides; the isolation membrane extends 10-15mm beyond the edge of the rubber sheet on both sides; the air-guiding felt extends 10-15mm beyond the edge of the isolation membrane on both sides.

6. The production method according to claim 3, wherein The splicing area between the first joint and the second joint is provided with a glue leakage gap, the width of which is 2-4mm.

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