CN103286960A - Forming and pressurizing method of wall plate with omega-shaped reinforcing rib - Google Patents

Abstract

The present invention relates to a method for forming and pressing a wall panel with Ω-shaped reinforcing ribs. The steps of the method are as follows: (1) pre-curing and finalizing the Ω-shaped reinforcing rib (1), and then combining the Ω-shaped reinforcing rib (1) with the wall panel ( 2) Combination; (2) Fill the prefabricated cylindrical vacuum bag (3) into the cavity (4) formed between the Ω-shaped rib (1) and the wall plate (2). The outer surface of the rib (1) and the wall plate (2) are covered with an outer vacuum bag (5), and the space between the outer surface of the cylindrical vacuum bag (3) and the inner surface of the Ω-shaped rib (1) and The inner surface of the outer vacuum bag (5) is connected and sealed with another space between the outer surface of the Ω-shaped rib (1) and the wall plate (2); (3) vacuumizes the space and keeps the degree of vacuum at 0.06～0.09MPa, then heat up and cure the whole pair with Ω-shaped reinforced wall panels, the curing temperature is 180±5℃, the holding time is 150+10min, the pressure is 0.4～0.6MPa, and the heating and cooling rate is 1～3℃ /min. Compared with the prior art, the method of the invention reduces the molding cost, simplifies the molding operation process, and improves the molding precision at the same time.

Description

A Forming and Pressing Method for Wall Panels with Ω-shaped Ribs

technical field

The invention relates to a forming and pressing method for a wall plate with Ω-shaped reinforcing ribs, which belongs to the technical field of compound material forming.

Background technique

In the aircraft structure, the rib panel structure is widely used in the tail, wing, empennage and other parts. The cross section of the rib is generally T-shaped, J-shaped, U-shaped, H-shaped, I-shaped, etc. 1) It is a new type of reinforcing rib. The section of the Ω-shaped reinforcing rib (1) is composed of an open arc and flanging at both ends of the arc at the opening, and its shape and structure are shown in FIG. 1 . This Ω-shaped rib (1) can improve the structural stability of the composite material wall panel (2). Compared with the composite material T-shaped rib structure, it reduces the product weight and greatly reduces the The complexity and processing difficulty of the tooling required for the manufacture of Ω-shaped rib parts from composite materials.

In the manufacturing process of large-scale reinforced panels for aircraft, in order to ensure the accuracy of the location and shape of the ribs, the conventional method of forming reinforced panels is to pressurize the inner side of the Ω-shaped rib with a silicone core mold, and use a metal composite mold to ensure the shape. , where the outer metal composite mold needs to be reliably connected and positioned on the main mold body. Therefore, the forming mold of the rib wall plate is often very complex in structure, requires very high manufacturing precision, and is difficult to process, resulting in high costs for the product and the forming mold.

Contents of the invention

The present invention is designed to provide a method for forming and pressing wall panels with Ω-shaped ribs in response to the above-mentioned deficiencies in the prior art. The purpose is to reduce the forming cost, simplify the forming operation process, and improve the forming accuracy at the same time.

The purpose of the present invention is achieved by the following technical solutions:

The method for forming and pressing the omega-shaped stiffener wallboard is characterized in that: the steps of the method are:

(1) pre-cure the Ω-shaped reinforcing rib (1) and then combine the Ω-shaped reinforcing rib (1) with the wall plate (2);

(2) Fill the prefabricated cylindrical vacuum bag (3) into the cavity (4) formed between the Ω-shaped rib (1) and the wall plate (2). ) and the outer surface of the wall plate (2) are covered with an outer vacuum bag (5), and the space between the outer surface of the cylindrical vacuum bag (3) and the inner surface of the Ω-shaped rib (1) and the outer vacuum bag ( 5) The inner surface of the Ω-shaped rib (1) and another space between the outer surface of the wall plate (2) are connected and sealed;

(3) Vacuum the space and keep the vacuum degree at 0.06-0.09MPa, then heat up and cure the whole pair of wall panels with Ω-shaped ribs, the curing temperature is 180±5°C, the holding time is 150+10min, the pressure 0.4~0.6MPa, heating and cooling rate 1~3℃/min.

The technical solution of the present invention has the advantages that: the pressurization method is simple and easy to operate, and has low cost.

Description of drawings

Fig. 1 is the structural shape schematic diagram of Ω type stiffener of the present invention

Fig. 2 is the covering structure schematic diagram of vacuum bag in the method for the present invention

Detailed ways

The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

Referring to shown in accompanying drawing 2, this a kind of forming pressure method of band Ω type stiffener wall plate is characterized in that: the step of this method is:

(1) pre-cure and shape the Ω-shaped rib 1, and then combine the Ω-shaped rib 1 with the wall plate 2;

(2) Fill the prefabricated cylindrical vacuum bag 3 similar to the cylindrical shape into the inner cavity 4 formed between the Ω-shaped rib 1 and the wall plate 2, and spread the outer surface of the Ω-shaped rib 1 and the wall plate 2 Cover the outer vacuum bag 5, the space between the outer surface of the cylindrical vacuum bag 3 and the inner surface of the Ω-shaped rib 1 and the inner surface of the outer vacuum bag 5 and the outer surface of the Ω-shaped rib 1 and the wall plate 2 The other space of the space is connected and sealed;

(3) Vacuum the space and keep the vacuum at 0.06-0.09MPa, then heat up and cure the whole pair of Ω-shaped reinforced wall panels, the curing temperature is 180±5°C, the holding time is 150+10min, the pressure 0.4~0.6MPa, heating and cooling rate 1~3℃/min.

Compared with the prior art, the method of the invention reduces the molding cost, simplifies the molding operation process, and improves the molding precision at the same time.

Claims (1)

1. moulding pressure method with Ω type reinforcement wallboard, it is characterized in that: the step of this method is:

⑴ with Ω type reinforcement (1) solidifying and setting in advance, then with Ω type reinforcement (1) and wallboard (2) combination;

⑵ be filled into cylindricality vacuum bag prefabricated, similar tubular (3) in the inner chamber (4) that forms between Ω type reinforcement (1) and the wallboard (2), vacuum bag (5) outside the outer surface of Ω type reinforcement (1) and wallboard (2) upper berth are covered is connected another space between the outer surface of the inner surface of the space between the inner surface of cylindricality vacuum bag (3) outer surface and Ω type reinforcement (1) and outer vacuum bag (5) and Ω type reinforcement (1), wallboard (2) and seals;

⑶ vacuumize described space, and keep vacuum at 0.06～0.09MPa, then to the integral body of band Ω type reinforcement wallboard to the curing that heats up, solidification temperature is 180 ± 5 ℃, temperature retention time is 150+10min, and pressure is 0.4～0.6MPa, 1～3 ℃/min of temperature rate.

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