摘要
针对复合材料固化成形过程中的变形问题,本文提出一种通过对模具型面的温度补偿来达到对材料变形量补偿的方法。该方法的设计思想是构件要在成形后满足设计形状,首先其在高温状态下的理想形状就应该是构件从低温升至玻璃态温度膨胀后的形状;其次模具在固化周期内的热变形为弹性变形,即材料固化脱模后的模具型面恢复至原来形状。模具型面的设计基础是准确预测模具型面在固化点温度时的几何形状。补偿后的数值模拟结果表明,采用热补偿的模具型面设计方法设计的模具型面能够有效补偿复合材料制件成形过程中由于模具与复合材料之间热、力学性能不一致以及固化过程中材料自身热、力学性能变化而导致的制件固化变形问题。
Aiming at the deformation issues of the composite during curing process, a kind of die surface temperature compensation method has been proposed in the text in order to compensate the deformation value of the composite. The idea is that the member satisfies design profile after being formed. Firstly, the ideal profile in high temperature is the expansion of the member from low temperature to the glass state temperature. Then, the hot deformation of die in the curing cycle is elastic, that is, the die surface would recover to the original profile after the composite is being cured and die releases. The die surface has been designed on the basis of accurate prediction of die surface geometry profile at curing point temperature. The compensated numerical simulation results show that die surface by hot compensation design method can effectively compensate the member curing deformation issues during composite member forming process caused by thermal and mechanical properties unconformity between die and composite, and changes of composite thermal and mechanical properties during curing process.
出处
《锻压装备与制造技术》
2017年第1期88-92,共5页
China Metalforming Equipment & Manufacturing Technology
