摘要
深孔加工技术中钻孔时出现偏斜是普遍存在的问题,加工又一难点是排屑困难。提出了用切削液消除或减小钻孔偏差的数学模型,其原理是液压锁紧,基于以上原理设计了带正锥度的BTA深孔钻,并通过实验验证其加工出的工件孔轴线的偏斜度得以减小;另外通过在BTA喉部后端设计二级入流口以形成一定负压,完成负压抽屑作用,利用CFD软件对优化后的BTA深孔钻进行流体仿真,观察到BTA深孔钻喉部的排屑效果显著提高。
It is a common problem that deviation occurs during drilling in deep hole processing technology,and the chip removal is difficult in process. This paper presents a mathematical model to eliminate or reduce drilling deviation of cutting fluid,the principle of hydraulic lock,the above principle is designed with a positive taper BTA drilling,and through experimental verification the machined parts hole axis deviation is decreased; also in the back-end design of two stage to the throat mouth to form a certain negative pressure,vacuum pumping crumbs effect,through CFD simulation on the optimized BTA deep hole drilling,the observed chip removal effect of throat BTA deep hole drilling is significantly improved.
作者
任丽娟
沈兴全
申浩
REN Lijuan;SHEN Xingquan;SHEN Hao(School of Mechanical Engineering, North University of China, Taiyuan 030051, CHN;Taiyuan University of Technology, Taiyuan 030051, CHN)
出处
《制造技术与机床》
北大核心
2018年第5期105-109,共5页
Manufacturing Technology & Machine Tool
关键词
BTA深孔钻
数学建模
钻孔偏差
负压抽吸
CFD仿真
BTA deep hole drilling
mathematical modeling
borehole deviation
negative pressure aspiration
CFD simulation
