CFRP/Ti叠层结构钻孔过渡域表面粗糙度演化机理

doi:10.3901/JME.2021.07.224

机械工程学报 ›› 2021, Vol. 57 ›› Issue (7): 224-233.doi: 10.3901/JME.2021.07.224

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CFRP/Ti叠层结构钻孔过渡域表面粗糙度演化机理

刘书暖, 宋晔, 郭东林, 张开富

西北工业大学机电学院西安 710072

收稿日期:2020-08-20 修回日期:2021-03-01 出版日期:2021-04-05 发布日期:2021-05-25
通讯作者: 刘书暖(通信作者),女,1979年出生,博士,副教授,硕士研究生导师。主要研究方向为难加工材料切削加工、数字化工艺设计、复合材料与结构切削加工工艺等。E-mail:liusn@nwpu.edu.cn
基金资助:
国家自然科学基金(51475379)和陕西省重点研发计划(2017GY-101)资助项目。

Study on the Surface Roughness of Transitional Field in Drilling CFRP/Ti Stacks

LIU Shunuan, SONG Ye, GUO Donglin, ZHANG kaifu

School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072

Received:2020-08-20 Revised:2021-03-01 Online:2021-04-05 Published:2021-05-25

摘要/Abstract

摘要： 碳纤维增强复合材料/钛合金(CFRP/Ti)叠层构件广泛应用于飞机结构，而其连接孔的表面粗糙度对连接可靠性具有重要影响。当钻头从CFRP侧钻入时，在CFRP过渡域的表面质量问题比较严重。为从钻削全过程控制表面粗糙度，研究了CFRP过渡域表面粗糙度的演化过程，提出了钻孔周期内/间表面粗糙度演化的概念模型，建立了粗糙度变化因子指标RVF_in和RVF_bet。通过对比试验发现，在钻孔周期内，0°、45°和90°纤维方向上的表面粗糙度恶化，而135°纤维方向上的表面粗糙度改善，在钻孔周期间，四个角度上的表面粗糙度发生不同程度地恶化，RVF_in和RVF_bet的数值变化能够方便地反映表面粗糙度的变化趋势，为CFRP/Ti叠层钻孔表面质量评价的工程应用提供了理论基础和技术方法。

关键词: CFRP/Ti叠层, CFRP过渡域, 粗糙度演化, 钻孔周期, 粗糙度变化因子

Abstract: Carbon fiber reinforced plastics and titanium (CFRP/Ti) stacks are widely used in aircraft structures, and the surface roughness of connection holes has an important impact on connection reliability. When drilling from the side of CFRP processing, serious surface quality problems often occur in the transition region of CFRP. In order to control the surface roughness in the whole drilling process, the evolution process of the surface roughness in the transition region of CFRP is mainly studied, an evolution model of surface roughness in/between drilling cycles is proposed, index of roughness variation factor, RVF_in and RVF_bet, are established. Through comparative experiments, it is found that the surface roughness of 0°, 45° and 90° fiber direction are deteriorated, while 135° fiber direction improved in the drilling cycle. It is also found that the surface roughness of four directions is deteriorated in varying degrees between the drilling cycle. However, the numerical change of RVF_in and RVF_bet can easily reflect these trends, and provides theoretical basis and technical method for engineering application of CFRP/Ti drilling surface quality evaluation.

Key words: CFRP/Ti stacks, transitional field of CFRP, roughness evolution, drilling cycle, roughness variation factor

中图分类号:

TH16

刘书暖, 宋晔, 郭东林, 张开富. CFRP/Ti叠层结构钻孔过渡域表面粗糙度演化机理[J]. 机械工程学报, 2021, 57(7): 224-233.

LIU Shunuan, SONG Ye, GUO Donglin, ZHANG kaifu. Study on the Surface Roughness of Transitional Field in Drilling CFRP/Ti Stacks[J]. Journal of Mechanical Engineering, 2021, 57(7): 224-233.

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CFRP/Ti叠层结构钻孔过渡域表面粗糙度演化机理

Study on the Surface Roughness of Transitional Field in Drilling CFRP/Ti Stacks

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