Cooling Process of Reverse Air Suctioning for Damage Suppression in Drilling CFRP Composites
Cooling Process of Reverse Air Suctioning for Damage Suppression in Drilling CFRP Composites
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DOI：
10.1016/j.procir.2019.09.031
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
R. Fu;Zhenyuan Jia;Fuji Wang;Yan Jin;D. Sun;D. Cheng;Lujia Yang
中科院分区：
文献类型：
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作者：
R. Fu;Zhenyuan Jia;Fuji Wang;Yan Jin;D. Sun;D. Cheng;Lujia Yang
碳纤维增强塑料（CFRP）复合材料是追求轻量化的航空航天领域高端装备的首选材料。然而，在CFRP的钻孔中产生高质量的孔仍然是一个长期存在的挑战，主要是由于其层间结合弱和对温度的敏感性。提出了一种新的碳纤维复合材料钻孔冷却工艺，即采用反向抽气，以减少钻孔出口的损伤。所提出的冷却工艺的概念是改变冷却剂流动方向，具有减小冷却剂作用在钻头出口上的力和增加对钻头出口材料的约束的益处。在干吸和反向吸风条件下进行了对比实验。结果表明，所提出的冷却过程可以显着降低钻削温度，低于Tg。尽管冷却过程导致了推力的增加，但与干钻相比，钻头损伤有所减少，并讨论了潜在的损伤抑制机制。
Carbon fiber reinforced plastic (CFRP) composites are the first choice for high-end equipment in fields of aviation and aerospace pursuing weight reduction. However, producing high quality holes in drilling of CFRP remains a long-standing challenge mainly due to its weak interlaminate bonding and sensitivity to temperature. This article proposed a novel cooling process for drilling of CFRP, deploying reverse air suctioning, to reduce drill-exit damages. The concept of the proposed cooling process is to change the coolant flow direction, with the benefits of reducing the force of the coolant acting on the drill exit and increasing the constraint of the drill-exit material. Comparative experiments are conducted under dry and reverse air suctioning conditions. Results show that the proposed cooling process can significantly reduce the drilling temperature, below Tg. Despite the cooling process has led to increased thrust force, the drill damages have been reduced as compared with the dry drilling, and the potential damage suppression mechanisms have been discussed.