Composite reinforced cylinder forming tool

Abstract

The utility model discloses a composite stiffened barrel forming tool which comprises a plurality of die bodies, a plurality of grooves are formed in the molded surface of each die body, and the die bodies are used for being spliced to form a forming surface matched with the inner surface of a composite stiffened barrel. The soft die assembly is used for forming a cap-shaped rib of the composite reinforced cylinder, and the soft die assembly is arranged in the groove; the end fixing plate is used for supporting the plurality of die bodies; the main body die and the end shaft are used for supporting the end fixing plate. According to the utility model, the defects of looseness, layering, debonding and the like of the combination position of the rib and the wall plate of the reinforced cylinder part are eliminated, and meanwhile, the structural mechanical property of the part is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material reinforced cylinder forming, and in particular relates to a composite material reinforced cylinder forming tool. Background Art

[0002] The stiffened panel structure is a reinforcement structure widely used in the structural design of aviation and aerospace vehicles. Generally, stiffening strips are used on the inner side of the structural shape perpendicular to the panel direction to improve the stiffness and bearing capacity of the panel and the overall structure. The stiffening strips and the panel can be made into an integral structure, or they can be connected together by gluing, riveting or fasteners. Common reinforcement forms include "L" type, "C" type, "Z" type, "T" type, "I" type, "J" type, "Ω" or hat-shaped ribs. When the existing technology makes hat-shaped ribs on the composite cylinder, it is easy to produce defects such as loose joints between the ribs and the wall panels, delamination and debonding, thereby affecting the overall mechanical properties of the composite cylinder. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides a composite reinforced cylinder forming tooling, which eliminates the defects of loose joints between the ribs and the wall panels of the reinforced cylinder component, delamination and debonding, and improves the structural mechanical properties of the component.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] In a first aspect, a composite reinforced cylinder forming tool is provided, comprising: a plurality of mold bodies, each of which is provided with a plurality of grooves on its molding surface, and the plurality of mold bodies are used to be spliced ​​to form a forming surface matching the inner surface of the composite reinforced cylinder; a soft mold assembly for forming hat-shaped ribs of the composite reinforced cylinder, the soft mold assembly being arranged in the grooves; an end fixing plate for supporting the plurality of mold bodies; and a main mold and an end shaft for supporting the end fixing plates.

[0006] Furthermore, it also includes a locking block assembly for connecting each mold body and the end fixing plate.

[0007] Furthermore, it also includes a positioning block for positioning two adjacent mold bodies.

[0008] Furthermore, it also includes a pressure equalizing plate for ensuring the molding quality of the outer surface of the composite reinforced cylinder.

[0009] Furthermore, the phantom includes phantom one, phantom two, phantom three and phantom four which have completely the same structure.

[0010] Furthermore, the soft mold assembly includes a silicone tube, a silicone core mold connected to the silicone tube, and a high-head knurled nut connected to the silicone core mold.

[0011] In a second aspect, a composite reinforced cylinder forming method is provided, which adopts the composite reinforced cylinder forming tooling described in the first aspect, and the method comprises: assembling a mold body, a main mold, an end fixing plate and an end shaft into a forming tooling for forming a composite reinforced cylinder; placing the preformed hat-shaped rib preforms into the grooves of each mold body respectively, and then placing the soft mold assembly into the groove of the hat-shaped rib preforms, and adjusting the soft mold assembly to adapt it to the mold surface of the mold body; laying skin wall panels on the cylindrical surface composed of the mold body, the hat-shaped ribs and the soft mold assembly, and laying equalizing plates outside the wall panels after all the laying is completed to ensure the outer surface forming quality of the composite reinforced cylinder; vacuum bagging and sending them into an autoclave for curing and molding, and demolding the tooling and the workpiece after curing and molding after cooling to room temperature.

[0012] Furthermore, the soft mold assembly is adjusted to adapt it to the mold surface, including: after placing the soft mold assembly into the hat-shaped rib preform groove, tightening the silicone core mold through the high-head knurled nuts at both ends of the soft mold assembly and making the silicone tube flush with the mold surface, and filling its R corner area with yarn.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides grooves on the molding surface of each mold body, and the mold bodies are spliced ​​to form a molding surface that matches the inner surface of the composite reinforced cylinder body; a soft mold component (10) for molding the cap-shaped ribs of the composite reinforced cylinder body is arranged in the grooves; the cap-shaped ribs of the composite reinforced cylinder body are individually paved to obtain a preform, which is then placed in the grooves of each rib on the mold body molding surface, and then the skin wall panels are paved and co-cured to form the preform, thereby eliminating the defects of looseness, delamination and debonding of the joint between the ribs and the wall panels of the reinforced cylinder body, and at the same time improving the structural mechanical properties of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a composite reinforced cylinder manufactured using a composite reinforced cylinder forming tool provided by an embodiment of the utility model;

[0015] Figure 2 It is an exploded view of a composite reinforced cylinder forming tool provided by an embodiment of the utility model;

[0016] Figure 3 It is an axonometric view of a composite reinforced cylinder forming tool provided by an embodiment of the utility model;

[0017] Figure 4 yes Figure 3 Partial view of the middle I area;

[0018] Figure 5 It is a schematic diagram of manufacturing a composite reinforced cylinder using a composite reinforced cylinder forming tool provided by an embodiment of the utility model;

[0019] In the figure: 1. Mold body 1; 2. Mold body 2; 3. Mold body 3; 4. Mold body 4; 5. Main mold; 6. End fixing plate; 7. Locking block assembly; 8. End shaft; 9. Positioning block; 10. Soft mold assembly; 101. Silicone tube; 102. Silicone core mold; 103. High head knurled nut; 11. Equalizing plate; 12. Composite reinforced cylinder. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0021] Embodiment 1:

[0022] like Figure 1 to Figure 5 As shown, a composite reinforced cylinder forming tool includes: a plurality of mold bodies, each mold body is provided with a plurality of grooves on the molding surface, and the plurality of mold bodies are used to splice to form a molding surface matching the inner surface of the composite reinforced cylinder 12; a soft mold assembly 10 for forming the hat-shaped ribs of the composite reinforced cylinder 12, and the soft mold assembly 10 is arranged in the grooves; an end fixing plate 6 for supporting the plurality of mold bodies; a main mold 5 and an end shaft 8 for supporting the end fixing plate 6.

[0023] The mold body in the utility model includes mold body 1, mold body 2, mold body 3 and mold body 4 with completely the same structure. It also includes a locking block assembly 7 for connecting each mold body with an end fixing plate 6, a positioning block 9 for positioning two adjacent mold bodies, and a pressure equalizing plate 11 for ensuring the outer surface molding quality of the composite reinforced cylinder 12.

[0024] The soft mold assembly 10 in the utility model comprises a silicone tube 101, a silicone core mold 102 connected to the silicone tube 101, and a high-head knurled nut 103 connected to the silicone core mold 102. The soft mold assembly 10 is arranged in the hat-shaped rib to ensure that the closed cavity molding and pressurization of the workpiece can also ensure smooth demoulding of the workpiece after the overall solidification molding.

[0025] Mold installation process: first, the two end fixing plates 6 are positioned and locked at the two ends of the main mold 5 by pins and screws, and the two end shafts 8 are installed on the outside of the end fixing plates 6 by pins and screws respectively. Then, by supporting the two end shafts 8, the assembly of the main mold 5, the end fixing plates 6, and the end shafts 8 is placed on the auxiliary support tooling to prepare for the installation of each mold body. Two groups of locking block assemblies 7 are respectively provided at both ends of each mold body. The inner side of the locking block assembly 7 is threadedly connected to the mold body, and the outer side passes through the corresponding slide groove on the end fixing plate 6. The locking block assembly 7 together with each mold body can move within a certain range in the slide groove of the end fixing plate 6. The mold body can be locked and fixed at the corresponding position of the end fixing plate 6 by screwing the nut on the outside of the locking block assembly 7. The relative position of each mold body is adjusted by controlling the locking block assembly 7. When the step difference and mold clearance at the joint of the parting surfaces of each mold body meet the requirements, the adjacent mold bodies are positioned by the positioning block 9 and the pin.

[0026] Process preparation, paving and curing: After all the molds are assembled, the preformed hat-shaped rib preforms are placed in the grooves of each mold surface, and then the soft mold assembly 10 is placed in the grooves of the hat-shaped rib preforms. The silicone core mold 102 is tightened through the high-head knurled nuts 103 at both ends, and the silicone tube 101 is flush with the mold surface and its R corner area is filled with yarn. Then, the skin wall panel is paved on the cylindrical surface composed of the mold, hat-shaped ribs, and soft mold assembly. After all the paving is completed, the equalizing plate 11 is laid outside the wall panel to ensure the molding surface quality of the composite reinforced cylinder 10, and the vacuum bag is made and sent to the autoclave for curing and molding.

[0027] Demolding process: after curing and molding, the tooling and the workpiece (composite reinforced cylinder 12) are cooled to room temperature and then demolded, the equalizing plate 11 is removed, and then the silicone core molds 102 and silicone tubes 101 are taken out from one end of each hat-shaped rib in turn, the positioning block 9 is removed and then the nuts on the outside of the locking block assemblies 7 at both ends of each mold body are loosened, and then mold body 1 1, mold body 3 3, mold body 2 2, and mold body 4 4 are moved toward the axis in turn, and after the fitting surfaces of each mold body and the composite reinforced cylinder 12 are completely separated, the nuts on the outside of the locking block assemblies 7 at both ends of each mold body are locked and fixed, and then the composite reinforced cylinder 12 is taken out to complete demolding.

[0028] The utility model of the molding tool can well meet the molding requirements of composite reinforced cylinder parts. The cap-shaped ribs of the composite reinforced cylinder are laid separately to obtain the preform, which is then placed in the grooves of each rib on the mold body surface and then the skin wall panels are laid and co-cured to form the preform. The risk of loose joints between the ribs and the wall panels of the reinforced cylinder parts, delamination and debonding, etc. is eliminated, and the mechanical properties of the structure of the parts are improved. The outer surface of the cylinder before vacuum bag pressing is provided with an equalizing plate to improve the apparent quality of the parts, and the apparent quality and mechanical properties of the parts after molding are guaranteed to the greatest extent. The tooling structure is simple and compact, the production efficiency is high, and the disassembly and assembly are convenient. The configuration of the tooling parts is simple and reliable, and the manufacturing and maintenance costs are low. The molding tool has low requirements on the operating level of the operator, and the simple operation greatly reduces the labor intensity of the operator. The molding tool uses machined parts and standard parts with simple configurations, etc. The overall structure is simple and compact, the installation and maintenance are convenient, the manufacturing cost is low, and the operation is reliable. The molding tool is widely used in the molding process of similar products of composite reinforced cylinders.

[0029] Embodiment 2:

[0030] Based on the composite reinforced cylinder forming tool described in Example 1, this embodiment provides a composite reinforced cylinder forming method, using the composite reinforced cylinder forming tool described in Example 1, the method includes:

[0031] Assemble the mold body, the main mold 5, the end fixing plate 6 and the end shaft 8 into a molding tool for molding the composite reinforced cylinder 12;

[0032] Place the preformed hat-shaped rib preforms into the grooves of each mold body respectively, then place the soft mold assembly 10 into the grooves of the hat-shaped rib preforms, and adjust the soft mold assembly 10 to adapt to the mold surface;

[0033] The skin wall panels are laid on the cylindrical outer surface composed of the mold body, the hat-shaped ribs, and the soft mold assembly 10. After all the laying is completed, the pressure equalizing plate 11 is laid outside the wall panels to ensure the outer surface molding quality of the composite reinforced cylinder 12;

[0034] The vacuum bags are made and sent to the autoclave for curing. After curing, the tooling and the workpiece are cooled to room temperature for demoulding.

[0035] Among them, the soft mold component 10 is adjusted to adapt it to the surface of the mold body, including: after the soft mold component 10 is placed in the groove of the hat-shaped rib preform, the high-head knurled nuts 103 at both ends of the soft mold component 10 are used to tighten the silicone core mold 102 and make the silicone tube 101 flush with the surface, and fill its R corner area with yarn.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A composite reinforced cylinder forming tool, characterized in that: include: A plurality of mold bodies, each of which has a plurality of grooves on its molding surface, and the plurality of mold bodies are used to be spliced ​​together to form a molding surface that matches the inner surface of the composite reinforced cylinder (12); A soft mold component (10) for forming a hat-shaped rib of a composite reinforced cylinder (12), wherein the soft mold component (10) is arranged in the groove; An end fixing plate (6) for supporting a plurality of said mold bodies; A main body mold (5) and an end shaft (8) are used to support the end fixing plate (6).

2. The composite reinforced cylinder forming tool according to claim 1, characterized in that: It also includes a locking block assembly (7) for connecting each mold body and the end fixing plate (6).

3. The composite reinforced cylinder forming tool according to claim 1, characterized in that: It also includes a positioning block (9) for positioning two adjacent mold bodies.

4. The composite reinforced cylinder forming tool according to claim 1, characterized in that: It also includes a pressure equalizing plate (11) for ensuring the molding quality of the outer surface of the composite reinforced cylinder (12).

5. The composite reinforced cylinder forming tool according to claim 1, characterized in that: The phantoms include phantom one (1), phantom two (2), phantom three (3) and phantom four (4) which have completely the same structure.

6. The composite reinforced cylinder forming tool according to claim 1, characterized in that: The soft mold assembly (10) comprises a silicone tube (101), a silicone core mold (102) connected to the silicone tube (101), and a high-head knurled nut (103) connected to the silicone core mold (102).

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