关键词: 复合材料成型模具, U形梁, 热压罐成型, 热膨胀系数, 回弹角补偿

Abstract: The three-dimensional software CATIA was used to design the composite component mold of autoclave forming and optimize the mold structure for the composite component U-shape girder. During the digital design process, the influential factors about thermal expansion coefficient, the molding structure, spring-back angle compensation, the composite structure demolding are considered. The mold of frame convex structure is made of Q235 ordinary carbon steel by welding, modifying the mold surface in order to eliminate or decrease the deformation and adding the spring-back angle (about 1degree) to guarantee the mold surface dimensional accuracy. The mold has reasonable structure, higher processing quality, lower cost, good sufficient stiffness and strength, and gas permeability. And, the tolerance of surface dimension can meet the manufacturing request. The composite component U-shape girder is manufactured by using the designed mold. The results show that the tolerance of surface dimension and the controlling of angle deformation meet the technical condition and assembly request.

Key words: composite component mold, U-shape girder, autoclave forming, thermal expansion coefficient, spring-back angle