Ultra-light composite wing compression molding tool

Abstract

The invention discloses an ultralight composite wing compression molding tool. The device comprises a base and detachable check blocks arranged at the two ends of the base, a cover plate covers the base and the check blocks, a wing cavity is formed among the cover plate, the base and the check blocks at the two ends, and the top face of the outer side of the cover plate and the top faces of the check blocks are connected and fixed through pressing blocks. The mold has the advantages that the detachable stop blocks are arranged at the two ends of the mold cavity and can be detached after molding is completed, so that constraint of the ends of the wing is released, demolding resistance is reduced, and product damage is avoided; the stop blocks are connected through countersunk screws, and the heads of the screws are lower than or flush with the surface of the base, so that interference on the molded surface is avoided, and the surface quality and aerodynamic performance of the wing are improved.

Description

Technical Field

[0001] This invention relates to the field of composite material molding tooling technology, and in particular to an ultralight composite material wing compression molding tooling. Background Technology

[0002] Ultralight composite material wings are widely used due to their advantages such as light weight, high strength, and corrosion resistance. Wing-like products are typically manufactured using compression molding, and their molding quality largely depends on the mold structure design.

[0003] Existing wing molding tooling typically suffers from the following problems: (1) Difficulty in demolding: Most existing molds adopt an integral closed structure, which can easily cause structural jamming at the wing tip, resulting in high demolding resistance and even damage to the product; (2) Unstable control of thickness and external dimensions: Traditional molds mainly rely on the overall pressing method to control the thickness, lacking an effective gap limiting structure, which can easily cause insufficient or excessive local pressure, thus affecting the dimensional accuracy of the product; (3) Traditional mold forming processes usually rely on special pressurizing equipment such as autoclaves and hydraulic presses to provide the pressure required for forming. Such equipment is not only complex in structure and has high purchase and maintenance costs, but also needs to continuously consume a lot of electrical energy, heat energy and other energy during operation. It has problems such as high energy consumption, low thermal efficiency, high operating costs and long forming cycle, which makes it difficult to meet the development needs of modern manufacturing that is lightweight, low cost and green and efficient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an ultralight composite material wing compression molding tooling that can meet the requirements of integrated wing molding, structural dimensional accuracy and surface quality.

[0005] To solve the above-mentioned technical problems, the ultralight composite material wing molding tooling of the present invention includes a base and detachable blocks disposed at both ends of the base. A cover plate covers the base and the blocks, and the cover plate, the base, and the blocks at both ends form an airfoil cavity. The outer top surface of the cover plate and the top surface of the blocks are connected and fixed by a pressure block.

[0006] The base is provided with limiting steps on both sides, and the stop is limited by the limiting steps.

[0007] The stop block is connected to the base by a countersunk screw, the head of which is lower than or flush with the surface of the base.

[0008] The cavity is an inwardly concave curved surface structure, and the stop block is an arc-shaped structure that matches the contour of the cavity end.

[0009] The upper surface of the base is flush with the upper surface of the stop.

[0010] The cover plate is provided with a limiting hole, a locking hole and an ejection hole.

[0011] The base edge is provided with a pry bar groove for prying out the mold.

[0012] Advantages of this invention: 1. By setting detachable blocks at both ends of the cavity, the blocks can be removed horizontally from both sides after molding, thereby releasing the constraint at the wing tip, reducing demolding resistance, and avoiding damage to the product; 2. The blocks are connected by countersunk screws, with the screw heads lower than or flush with the base surface to avoid interference with the molded surface, which is beneficial to improving the surface quality and aerodynamic performance of the wing. 3. The cover plate is provided with limiting holes, locking holes and ejection holes. The limiting holes are used to cooperate with the positioning structure on the base to achieve the centering and positioning of the cover plate and the base; the locking holes are used to pass fasteners to lock the cover plate and the base together, thereby ensuring the stable transmission of pressure during the molding process; the ejection holes are used to set the ejection components during the demolding process to apply ejection force to the molded cover plate and reduce demolding resistance. 4. This mold can be directly put into the oven for curing. It uses a locking structure to provide pressure, without the need for additional equipment to increase the pressure. Attached Figure Description

[0013] Figure 1 This is a side view of the ultralight composite material wing molding tooling of the present invention; Figure 2 This is a top view of the ultralight composite material wing molding tooling of the present invention. Detailed Implementation

[0014] The ultralight composite material wing molding tooling of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0015] As shown in the figure, the ultralight composite material wing molding fixture includes a base 2, a stop block 3, a cover plate 4, and a pressure block 5. The base 2 is the main structure of the mold, and a cavity 1 extending along the length direction is set at the center of its surface. The cavity 1 is an inwardly concave curved surface structure, and its shape matches the shape of the wing. It is used to place the composite material layup and form the lower surface contour of the wing. Stop blocks 3 are set at both ends of the cavity 1. The stop blocks 3 are arc-shaped structures that match the end contour of the cavity and are used to limit and shape the end of the wing. The stop blocks 3 are detachably connected to the base 2 by countersunk screws 6. The head of the countersunk screws 6 is lower than or flush with the upper surface of the base 2, so that the base 2 and the stop blocks 3 form a continuous and flat support surface. The cover plate 4 is positioned above the base 2 to cover the cavity 1, forming a closed molding space together with the base 2. The cover plate 4 is preferably a flat plate structure, with its lower surface forming a molding space between it and the base 2 to accommodate the composite material. The stop block 3 is sandwiched between the cover plate 4 and the base 2 and is connected to the base 2 by fasteners. Pressure blocks 5 are provided at both ends of the cover plate 4, and limiting steps are provided on both sides of the base 2. The stop block 3 is limited by the limiting steps. The cover plate 4 is provided with 4 symmetrically distributed limiting holes 7, 8 locking holes 8, and 6 ejection holes 9. The edge of the base 2 is provided with 4 pry bar grooves 10 for prying out the mold.

[0016] In use, the composite material layup is placed in the cavity 1 of the base 2, the end is sealed by the stop block 3, and then the cover plate 4 is placed on the base 2 and pressed by the pressure block 5 and fasteners to form a controlled gap between the cover plate 4 and the base 2. The molding is completed under pressure and heating conditions. After molding, the pressure block 5 and the stop block 3 are removed first. The pry bar is placed on the pry bar groove 10, and the cover plate 4 is removed by using the ejection hole 9 in conjunction with the pry bar. The molded wing product is taken out of the cavity 1, and the demolding is successfully achieved.

Claims

1. A tooling for molding ultralight composite material wings, characterized in that: It includes a base (2) and removable blocks (3) at both ends of the base (2). The base (2) and the blocks (3) are covered with a cover plate (4). The cover plate (4), the base (2) and the blocks (3) at both ends form an airfoil cavity (1). The outer top surface of the cover plate (4) and the top surface of the blocks (3) are connected and fixed by a pressure block (5).

2. The ultralight composite material wing molding tooling according to claim 1, characterized in that: The base (2) is provided with limiting steps on both sides, and the stop block (3) is limited by the limiting steps.

3. The ultralight composite material wing molding tooling according to claim 1, characterized in that: The stop block (3) is connected to the base (2) by a countersunk screw (6), the head of which is lower than or flush with the surface of the base.

4. The ultralight composite material wing molding tooling according to claim 1, characterized in that: The cavity (1) is an inwardly concave curved surface structure, and the stop block (3) is an arc-shaped structure that matches the end contour of the cavity (1).

5. The ultralight composite material wing molding tooling according to claim 1, characterized in that: The upper surface of the base (2) is flush with the upper surface of the stop (3).

6. The ultralight composite material wing molding tooling according to claim 1, characterized in that: The cover plate (4) is provided with a limiting hole (7), a locking hole (8) and an ejection hole (9).

7. The ultralight composite material wing molding tooling according to claim 1, characterized in that: The base (2) has a crowbar groove (10) on its edge for crowbar lifting.

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