A study on the process design of prepreg compression forming using rapid heating and cooling system
A study on the process design of prepreg compression forming using rapid heating and cooling system
复制标题
快速加热冷却系统预浸料压缩成型工艺设计研究
DOI：
10.1016/j.proeng.2017.10.742
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
D. Ko
中科院分区：
文献类型：
--
作者：
Jeong;Byung;Sang;J. Park;D. Ko
预浸料压缩成形（PCF）是一种具有高机械性能、低设备成本和高表面质量的制造工艺。通常，刀具与层压板之间的温差和快速传热会导致热变形、成形性低和表面质量差等问题。因此，本文试图采用类似于注射成型的快速加热和冷却装置来解决这些问题。可以在几分钟内将刀具加热到50℃以上并冷却到50℃以下。同时，快速冷却系统防止了变形的缺陷。本研究基于结构分析和热成形分析，设计了CFRTP b柱增强件的制造工艺。首先，通过结构分析确定满足常规钢材吸能要求的层压板厚度；其次，对预浸料的热性能进行了评价，并进行了热成形分析。对CFRTP层压板进行了热成形分析，确定了保温力。最后，制作了CFRTP b柱增强材料，并对其尺寸精度和剪切角进行了评价。
Prepreg compression forming(PCF) is well known for the manufacturing process with high mechanical properties, low equipment cost and high surface quality. Generally, the temperature difference and rapid heat transfer between the tool and laminate can lead to some problems such as heat distortion, low formability and bad surface quality. Therefore, this paper attempts to solve these problems by using the rapid heating and cooling device, similarly to injection molding. It is possible to heat the tool above Tgand cool it down under Tgwithin few minutes. Also, the defect of distortion is prevented by rapid cooling system. In this study, the manufacturing process of CFRTP B-pillar reinforcement was designed based on structural analysis and thermal forming analysis. First, the thickness of laminate satisfying the energy absorption of conventional steel product was determined through structural analysis. Second, the thermal properties of the prepreg was evaluated for the thermal forming analysis. The thermal forming analysis of CFRTP laminate was carried out to determine the holding force. Finally, B-pillar reinforcements of CFRTP were fabricated and evaluated their dimensional accuracies and shear angle.