CN107283137A - A kind of moulding technique of structural adhesive bonding part - Google Patents

Abstract

The invention provides a molding process method for structural glued parts, which includes the following steps. The first step: first place the reinforcing angle material (4) on the lower surface of the product in the corresponding groove of the tooling for fixing; the second step: then place the reinforcing angle material (4) of the product Put the flange (3) into the tooling, and press and fix it with the configuration pressing parts in the mechanical pressure area (7) to ensure the position and size of the flange (3); the third step: put the web (2) On the edge strip (3) and the lower surface reinforcement angle (4), place the upper surface reinforcement angle (1) of the web (2) on the corresponding position on the top of the web (2), and the upper surface of the web (2) The position of the surface reinforced angle material (1) is determined by the positioning edge of the tooling; the fourth step: laying the release film and air felt, installing the vacuum nozzle, and pasting the vacuum bag; the fifth step: pressurizing the vacuum bag; the sixth step : solidified in the furnace.

Description

A molding process method for structural adhesive joint parts

technical field

The invention belongs to the field of parts processing, and in particular relates to a forming process method of structural glued parts.

Background technique

The metal structure of a certain type of aircraft has many bonding parts, and the bonding area is about 70% of the entire aircraft area. Taking the fuel tank beam as an example, due to its complex structure, the forming method adopts all mechanical pressurization. The mechanical pressurization tooling is pressurized manually by workers, and the pressure is uneven. Long-term high-temperature curing in the furnace causes tooling mechanical pressurization to press the compression parts. Deformation leads to unstable bonding quality and size deviation, which cannot meet the design requirements. The product qualification rate is low, which seriously affects the stability of product quality, and frequent tooling repairs are required, resulting in low production efficiency.

Contents of the invention

The technical problem to be solved in the present invention:

Since the forming tooling adopts a mechanically pressurized structure, its instability seriously affects the bonding quality of the product. The purpose of the invention is to improve the stability of product quality and the pass rate of products by adopting a new molding process method, meet design requirements, improve production efficiency and reduce production cost.

Technical scheme of the present invention:

A molding process method for structural adhesive parts, comprising the following steps

The first step: first place the reinforcing angle material 4 on the lower surface of the product in the corresponding groove of the tooling for fixing;

Step 2: Then put the edge strip 3 of the product into the tooling, and press and fix it with the configuration pressing parts in the mechanical pressure area 7, so as to ensure the position and size of the edge strip 3;

Step 3: After that, place the web 2 on the edge strip 3 and the lower surface reinforcing angle material 4, place the upper surface reinforcing angle material 1 of the web 2 on the corresponding position above the web 2, and strengthen the upper surface of the web 2 The position of angle material 1 is determined by the positioning edge of the tooling;

Step 4: Lay out the release film and air felt, install the vacuum nozzle, and paste the vacuum bag;

Step 5: Pressurize the vacuum bag;

Step 6: Curing in the oven.

The invention adopts a process method combining vacuum bag pressurization and mechanical pressurization to effectively ensure the bonding quality of parts. From the perspective of process operation, the method of combining vacuum bag pressurization and mechanical pressurization is more controllable than a single mechanical pressurization method. Equipment can be used to check the degree of sealing of the vacuum bag, and the pressure can be controlled through the equipment, which effectively reduces the number of workers. Compared with the operation method of single mechanical pressing, this method reduces the labor intensity of workers, improves production efficiency, and effectively reduces the defects caused by human factors such as uneven pressure caused by workers' operation.

Description of drawings

Figure 1 is a schematic cross-sectional view of the fuel tank beam product structure;

Figure 2 shows the distribution of the pressurized area of the product on the tooling;

Among them: 1 is the upper surface reinforced angle material, 2 is the web, 3 is the edge strip, 4 is the lower surface reinforced angle material, 5 is the glue joint surface, 6 is the vacuum bag pressurized area, and 7 is the mechanical pressurized area.

detailed description

Step 1: First, place the lower surface reinforced angle material 4 in the corresponding groove of the tooling for fixing.

Step 2: Then put the edge strip 3 into the tooling, and press and fix it with the configuration pressing part of the mechanical pressing part 7, so as to ensure the position and size of the edge strip 3.

Step 3: After that, place the web 2 on the edge strip 3 and the lower surface reinforcing angle material 4, place the upper surface reinforcing angle material 1 on the web on the corresponding position on the web 2, and the position is determined by the positioning edge strip of the tooling.

Step 4: Lay a release film and an air felt on the assembled upper surface reinforcing angle material 1 and web 2, install a vacuum nozzle, and paste a vacuum bag.

Step 5: Vacuum the negative pressure to make the vacuum bag exert pressure on the product, check the airtightness of the pasted vacuum bag through the equipment to ensure that there is no air leakage in the vacuum bag and that there is no bridging phenomenon in the vacuum bag.

Step 6: Curing in the oven.

Claims (1)

1. A molding process method for structurally bonded parts, characterized in that it comprises the following steps The first step: first place the reinforcing angle material (4) on the lower surface of the product in the corresponding groove of the tooling for fixing; Step 2: Then put the edge strip (3) of the product into the tooling, and press and fix it with the configuration pressing parts in the mechanical pressure area (7), so as to ensure the position and size of the edge strip (3); Step 3: After that, place the web (2) on the flange (3) and the lower surface reinforcement angle (4), and place the upper surface reinforcement angle (1) of the web (2) on the web (2) At the corresponding position, the position of the reinforcing angle material (1) on the upper surface of the web (2) is determined by the positioning edge strip of the tooling; Step 4: Lay out the release film and air felt, install the vacuum nozzle, and paste the vacuum bag; Step 5: Pressurize the vacuum bag; Step 6: Curing in the oven.