CN214395506U

CN214395506U - Forming die for I-shaped parts made of composite materials

Info

Publication number: CN214395506U
Application number: CN202023041675.0U
Authority: CN
Inventors: 杨五兵; 李营; 胡林波; 王环
Original assignee: AVIC Sac Commercial Aircraft Co Ltd
Current assignee: AVIC Sac Commercial Aircraft Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-10-15
Anticipated expiration: 2030-12-17

Abstract

The utility model belongs to combined material mould design field discloses combined material i-shaped part forming die, including lower die body, last die body, compound material side cap board A, compound material side cap board B. The lower die body is of a convex structure, and the upper die body is of a C-shaped structure; the lower die body is made of 45 steel or invar steel, and the upper die body is made of a carbon fiber composite cover plate. The novel mold design scheme is used for manufacturing the I-shaped composite material parts, and solves the problems that the manufacturing defects of the parts are not easy to control and the rejection rate is high in the manufacturing process of the I-shaped parts. Meanwhile, the tool is light in weight and simple to use and operate.

Description

Forming die for I-shaped parts made of composite materials

Technical Field

The utility model belongs to combined material mould design field relates to a combined material i-shaped part forming die.

Background

The resin-based carbon fiber composite material has the advantages of designability, strong specific strength and specific stiffness, good corrosion resistance and fatigue fracture resistance, convenience for integral forming and the like, and is widely applied in the fields of aviation, aerospace and transportation at present. The I-shaped parts have good mechanical properties and large occupation proportion in aerospace parts, but the I-shaped composite material parts have more laying elements and complex dies. Particularly, in the curing process of the carbon fiber composite material, the defects of pores, layering and the like are easily caused by too many influence factors such as a mould scheme, a process scheme, a resin system, a part structure and the like, and particularly, large-size I-shaped beams and stringer parts have complex mould structures due to more laying factors. The whole part is scrapped due to the easy occurrence of manufacturing defects such as pore layering and the like in the manufacturing process of the part.

SUMMERY OF THE UTILITY MODEL

The general technological scheme of the existing I-shaped composite material part is that two C-shaped blanks are firstly paved, and after the two C-shaped blanks are combined, two side edge strips and zero-degree fibers are paved. To the above-mentioned weak point that exists in the current manufacturing process, the utility model provides a new mould scheme changes the pressure transmission mode in the I-shaped structure part shaping scheme in the past, makes it in the shaping process, carries out even pressure transmission. The defects of pores, layering and the like are reduced and avoided, and the manufacturing yield of the I-shaped beam and stringer parts is improved.

The technical scheme of the utility model as follows:

the molding die for the composite material I-shaped part comprises a lower die body, an upper die body, a composite material side cover plate A and a composite material side cover plate B; the lower die body is of a convex structure, and the upper die body is of a C-shaped structure; the lower die body is made of 45 steel or invar steel, and the upper die body is made of a carbon fiber composite cover plate; the molded surface of the lower die body is fixed on the frame through a guide pin and a positioning pin; the composite side cover plate A and the composite side cover plate B have the same structure, and the molded surfaces of the cover plates at the two sides are the same as the molded surfaces at the two sides of the part; the composite side cover plate A and the composite side cover plate B are respectively fixed on two sides of a boss of the lower die body through screws; the upper die body is fixed on the upper plane of the boss of the lower die body through screws.

Furthermore, the two sides of the lower die body frame are respectively provided with a hanging ring, so that the die can be moved conveniently.

The beneficial effects of the utility model are that, adopt a novel mould design for making industry type combined material part manufacturing, solved in the industry type part manufacturing process, the part is made the difficult control of defect, the condition that the disability rate is high. Meanwhile, the tool is light in weight and simple to use and operate.

Drawings

FIG. 1 is a schematic view of the structure of a lower mold body.

FIG. 2 is a left side view of the lower mold body.

FIG. 3 is a top view of the lower mold body.

FIG. 4 is a sectional view of the entire structure of the molding die.

Fig. 5 is a schematic view of the whole structure of the forming die.

Fig. 6 is a schematic view of the mold body structure.

In the figure: 1, molding surface; 2, a frame; 3, a composite material side cover plate A; 4, a composite material side cover plate B; 5, mounting a die body; 6, positioning pins; 7, hanging rings; 8 guide pins.

Detailed Description

The composite material I-shaped part forming die and the part forming scheme are specifically described by figures 1-6.

The molding die for the composite material I-shaped part comprises a lower die body, an upper die body 5, a composite material side cover plate A3 and a composite material side cover plate B4; the lower die body is of a convex structure, and the upper die body is of a C-shaped structure; the lower die body is made of 45 steel or invar steel, and the upper die body is made of a carbon fiber composite cover plate; the molded surface 1 of the lower die body is fixed on the frame 2 through a guide pin 8 and a positioning pin 6; the composite side cover plate A3 and the composite side cover plate B4 have the same structure, and the molded surfaces of the cover plates at the two sides are the same as the molded surfaces at the two sides of the part; the composite side cover plate A3 and the composite side cover plate B4 are respectively fixed on two sides of the lower die body boss through screws; the upper die body 5 is fixed on the upper plane of the lug boss of the lower die body through screws. The two sides of the lower die body frame 2 are respectively provided with a hanging ring 7, so that the die can move conveniently.

The molding scheme is as follows:

firstly, the C-shaped blank under the I-shaped part is directly paved on a lower die body of a die, the paving can be manual paving or thermal diaphragm forming, and if the thermal diaphragm forming is adopted, a forming die and a thermal diaphragm can be shared.

The C-shaped blank on the I-shaped part is laid on a special C-shaped laying die, and manual laying or hot diaphragm forming can be adopted.

And after the upper C-shaped blank and the lower C-shaped blank are laid and formed, combining the upper C-shaped laying mold with the lower mold, laying other blanks after combination, and removing the upper C-shaped laying mold after laying. And combining an upper die body (namely, a carbon fiber composite cover plate) and composite side cover plates at two sides, and curing after packaging.

The molded surfaces of the composite cover plates on the two sides are made of carbon fiber materials, and the stability of the whole die is preserved in the curing process.

The upper die body of the C-shaped structure is used for forming a C-shaped soft die, and the molded surface of the C-shaped soft die is the inner molded surface of the I-shaped part. The thickness and the hardness of the C-shaped soft mold can be adjusted according to the actual condition of the part.

Claims

1. The forming die for the composite material I-shaped part is characterized by comprising a lower die body, an upper die body (5), a composite material side cover plate A (3) and a composite material side cover plate B (4); the lower die body is of a convex structure, and the upper die body is of a C-shaped structure; the lower die body is made of 45 steel or invar steel, and the upper die body is made of a carbon fiber composite cover plate; the molded surface (1) of the lower die body is fixed on the frame (2) through a guide pin (8) and a positioning pin (6); the composite side cover plate A (3) and the composite side cover plate B (4) have the same structure, and the molded surfaces of the cover plates at the two sides are the same as the molded surfaces at the two sides of the part; the composite side cover plate A (3) and the composite side cover plate B (4) are respectively fixed on two sides of the boss of the lower die body through screws; the upper die body (5) is fixed on the upper plane of the lug boss of the lower die body through screws.

2. The molding die for the composite i-shaped part according to claim 1, wherein the lower mold frame (2) is provided with hanging rings (7) at both sides thereof, respectively.