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本文借鉴金属零件热校形工艺的经验,利用复合材料在高温下的应力松弛现象,通过热校形工艺修正复合材料零件的形状。制造了碳纤维平纹织物/环氧复合材料L形梁、C形梁,通过自制的热校形模具,以实验方法研究热校形时间、热校形载荷对零件形状的影响,分析复合材料热校形工艺的可行性。研究表明,复合材料热校形工艺中零件变形的主要原因是零件在高温下发生应力松弛,其他因素可以忽略;热校形载荷、热校形时间都对热校形工艺的效果有重要影响。针对特定的复合材料结构,采用合理的热校形工艺过程能够有效地控制构件形状,方便零件的装配。
In this paper, we learn from the experience of hot metal forming technology, the use of composite material at high temperature stress relaxation phenomenon, through the hot camber process to modify the shape of composite parts. The carbon fiber plain weave fabric / epoxy composite L-shaped beam and C-shaped beam were fabricated. The effects of thermal profile time and thermal profile load on the shape of the part were studied by the homemade thermal profile mold. Shape of the feasibility of the process. The results show that the main reason for the deformation of the parts in the hot texturing process is the stress relaxation of the parts under high temperature. Other factors can be neglected. The hot texturing load and hot texturing time all have an important influence on the heat texturing process. For a specific composite structure, the use of a reasonable hot calibration process can effectively control the shape of the component to facilitate the assembly of parts.