摘要
钛合金深小孔钻削过程具有切削温度高、排屑困难以及加工质量差等问题,利用振动钻削可以改善切削性能的特点,采用这一非传统加工方法进行钛合金深小孔的钻削实验研究。根据振动钻削的运动学特点建立数学模型,理论阐述了振动钻削具有提升加工精度与降低出口毛刺的优势。以10 mm厚TC4钛合金板为实验材料,选用直径2 mm的硬质合金钻头进行通孔钻削试验。结果表明:在同一参数下,振动钻削得到孔的加工精度高,内壁表面形貌较好,孔径差值降低了52.9%,粗糙度Ra值降低了37.5%,出口毛刺情况得到较大改善。此外,振幅的增加,可以提高孔的加工质量,而进给量则反之。
The deep and small hole drilling process of titanium alloy has the problems of high cutting temperature,difficult chip removal and poor machining quality,etc.Based on the characteristics that vibration drilling can improve the cutting performance,this non-traditional machining method was used to conduct experimental research on the drilling of deep and small holes in titanium alloy.A mathematical model was established based on the kinematic characteristics of vibration drilling,and the advantages of vibration drilling in improving machining accuracy and reducing exit burrs were theoretically explained.A 10 mm thickness TC4 titanium alloy plate was used as the experimental material,and a 2 mm diameter carbide drill was selected for through-hole drilling test.The results show that under the same parameters,vibration drilling obtains high machining accuracy of the hole,better inner wall surface topography,52.9% reduction of hole diameter difference,37.5% reduction of roughness Ra value,and greater improvement of exit burr situation.In addition,the increase in amplitude improves the quality of hole machining,while the opposite is true for feeds.
作者
何云
郑俊杰
雷学林
李子璇
He Yun;Zheng Junjie;Lei Xuelin;Li Zixuan(College of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)
出处
《硬质合金》
CAS
2021年第3期211-218,共8页
Cemented Carbides
关键词
振动钻削
加工质量
钛合金
深小孔
vibratory drilling
machining quality
titanium alloy
deep small holes
