多型面复合材料支架成型技术

Molding Technology of Polyhedral Composite Support

阐述了一种多型面复合材料支架整体成型技术,重点对工艺方案、模具设计、铺层工艺优化设计、固化方式进行了探究。结果表明:采用一体化成型方案,能够实现一种多型面复合材料支架的成型。通过工艺研究,突破了组合式模具设计,对称、阶梯过渡的铺层,真空辅助硅橡胶加压关键技术。产品具有较优的成型质量、尺寸精度及力学性能。复合材料制件内部无分层、疏松、孔隙等缺陷,纤维体积分数可控制在(60±3)%,孔隙率测试值均低于1.0%。产品安装面平面度优于0.3 mm,角度公差在±0.1°范围内。随炉试件力学性能高于设计指标,满足用户使用要求。

The integral forming technology of a polyhedral composite support was introduced. Machining scheme,mould design,the optimistic design of overlay processing and curing technique were researched. The results show that the large-scale polyhedral composite support can be formed by the integrated forming process. The key technology includes design of combined mould,symmetrical and step transition laying,and vacuum assisted pressurization of silicone rubber. The product possesses high molding quality,dimensional accuracy and mechanical properties. There are no lamination,porosity,voids and other defects inside the pruduct. The fiber volume fraction can be controlled at(60±3)%,and the voids are all lower than 1. 0%. The flatness of the product installation plane is better than 0. 3 mm,and the angle tolerance is within ±0. 1°. The mechanical properties of the furnace specimens are all higher than the design indexes which can meet the user′s requirements.