Soft tooling forming method used for reinforcing rib and web plate co-bonding and application

Abstract

The invention discloses a soft tooling forming method used for reinforcing rib and web plate co-bonding and application. Rubber and reinforced fiber prepreg are paved on a reinforcing rib metal fake part and a positioning device part to make soft tooling, and the soft tooling is used for reinforcing rib and web plate co-bonding. Compared with a traditional core mold forming method, the soft tooling can evenly and precisely transmit pressure applied by a hot pressure tank, the phenomenon of thickness overproof appearing in a composite part is avoided, meanwhile, the soft tooling is thin, and the thermal hysteresis effect of the reinforcing rib portion can be avoided. The forming quality of the composite product can be effectively ensured, the production yield and efficiency can be improved,meanwhile, the positioning device ensures the reinforcing rib and web plate relative position precision of the composite product obtained through reinforcing rib and web plate co-bonding, and the product quality is ensured.

Description

technical field [0001] The invention relates to a forming method and application of a soft tooling used for the co-gluing of reinforcing ribs and webs. Background technique [0002] Resin-based carbon fiber composite materials have superior properties such as specific strength and specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, and good dimensional stability. They are currently widely used in aviation, aerospace, transportation and other fields. High-performance structural materials. Among various carbon fiber composite molding processes, the autoclave process has uniform molding temperature and pressure, and has good adaptability to parts of different materials, shapes, sizes and structures. One of the main process methods of material components. [0003] With the increasing requirements for the strength and stiffness of composite parts, the structure of the parts is becoming more and more complex. Among them, the web stru...

AI Technical Summary

Problems solved by technology

The disadvantages of using the mandrel mainly include the following three aspects: (1) Since the mandrel itself has a certain rigidity, it is difficult to achieve uniform and accurate conduction of external pressure through the mandrel, and it is easy to cause the thickness of the reinforcing rib of the part to be out of tolerance; (2) ) Since the mandrel has a certain thickness, according to the heat conduction effect, the temperature rise rate of the rib part of the part will lag behind that of other parts, thus affecting the internal molding quality of the part; very inconvenient

At the same time, the manufacturing and maintenance costs of the metal mandrel are relatively high, and the manufacturing cycle for repair or reprocessing is relatively long

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