Method for forming J-shaped beam structure composite workpiece by open type soft tooling

Abstract

The invention discloses a method for forming a J-shaped beam structure composite workpiece by open type soft tooling; fiber-reinforced rubber open type soft tooling can be formed by a metal mold, the formed soft tooling can be one part of a formed mold for completing the forming process of the composite produced part. Compared with a traditional core mold forming method, the soft tooling can uniformly and accurately transmits pressure applied by an autoclave, out-of-tolerance of thickness of the composite workpiece can be avoided, the soft tooling is thinner in wall thickness, thermal hysteresis effect can be avoided, the forming quality of the workpiece can be effectively guaranteed by the above two points, and the qualified rate and the efficiency of production can be improved. The soft tooling can be used repeatedly, the reproduction is also more convenient, and the production cost and the manufacturing cycle are effectively reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of manufacturing high-performance carbon fiber composite material structural parts in the aircraft, spacecraft and automobile industries, in particular to a method for forming J-shaped beam structural composite material parts with open soft tooling. 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] J-beam is a re...

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Problems solved by technology

[0005] However, 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 composite material to be out of tolerance; (2) ) Since the core mold has a certain thickness and the thickness is not uniform, according to the heat conduction effect, the heating rate of different regions of the workpiece will be different, thus affecting the internal molding quality of the workpiece; (3) Since the core mold is made of metal, the weight is relatively large , very inconvenient to operate

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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