北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (1): 229-240.doi: 10.13700/j.bh.1001-5965.2018.0620

• 论文 • 上一篇    

CFRP超声振动套磨钻孔高效排屑机理和实验

李哲1, 王新1, 张毅1, 侯博1, 张德远2   

  1. 1. 航天材料及工艺研究所, 北京 100076;
    2. 北京航空航天大学 机械工程及自动化学院, 北京 100083
  • 收稿日期:2018-10-29 发布日期:2020-01-21
  • 通讯作者: 张德远 E-mail:zhangdy@buaa.edu.cn
  • 作者简介:李哲,男,博士,工程师。主要研究方向:复合材料等难加工材料及其构件先进制造及高效精密加工装配与装备技术、数字智能化设计制造与装配技术、振动切削与功率超声技术;张德远,男,博士,教授,博士生导师。主要研究方向:复合材料等难加工材料及其构件高效精密加工与装配技术、振动切削与功率超声技术。

Mechanism and experiment on high-efficiency chip removal in ultrasonic vibration core drilling of CFRP

LI Zhe1, WANG Xin1, ZHANG Yi1, HOU Bo1, ZHANG Deyuan2   

  1. 1. Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China;
    2. School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China
  • Received:2018-10-29 Published:2020-01-21

摘要: 针对碳纤维增强复合材料(CFRP)在普通套磨钻孔(CCD)过程中,切屑粉尘粘刀和料芯堵刀导致的排屑效果较差而影响套磨加工效率和加工质量的问题,采用超声振动套磨钻孔(UVCD)新技术进行了CFRP高效套磨钻孔的基础理论和实验研究。从理论上分析了CFRP超声振动套磨钻孔原理和高效排屑机理,同时结合所设计的超声振动气钻和车床平台实验验证了CFRP超声振动套磨钻孔的高效排屑钻孔效果。结果表明:相比于CFRP普通套磨钻孔,超声振动套磨钻孔极大提高了切屑粉尘和料芯的排屑效果,有效防止了切屑粉尘粘刀和料芯堵刀现象,明显降低了12%~20%的钻削力、16%~24%的切削温度和33%~39%的孔表面粗糙度,明显改善了CFRP孔加工质量并且延长了套磨刀具使用寿命。

关键词: 碳纤维增强复合材料(CFRP), 金刚石套磨刀具, 超声振动套磨钻孔(UVCD), 高效排屑, 加工质量

Abstract: To solve the problems of poor chip removal effects like the chip adhesion and rod jamming of core drill tool that would have a significantly negative influence on machining efficiency and machining quality during common core drilling (CCD) process of carbon fiber reinforced plastics (CFRP) using a core drill, the novel ultrasonic vibration core drilling (UVCD) technology was employed so as to carry out the basic theory and experiment study of high-efficiency core drilling CFRP. The core drilling principle and high-efficiency chip removal mechanism of UVCD were analyzed by theoretical method, meanwhile the machining effects of high-efficiency chip removal in UVCD of CFRP was verified by experimental method with a designed ultrasonic vibration air drill and lathe platform. The results indicate that compared with the CCD of CFRP, in the UVCD process, the chip removal effects of chip and rod are greatly improved, the problems of chip adhesion and rod jamming of core drill tool are effectively prevented, the thrust force, cutting temperature and hole surface roughness decrease by 12%-20%, 16%-24% and 33%-39% respectively, the machining quality of CFRP hole is obviously improved, and the tool life of core drill will be evidently prolonged.

Key words: carbon fiber reinforced plastics (CFRP), diamond core drill, ultrasonic vibration core drilling (UVCD), high-efficiency chip removal, machining quality

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