摘要
通过对低频振动工艺下刀具切削运动过程进行分析,得到低频振动钻削时刀具切削轨迹和切削角度的变化规律。通过开展钻削工艺实验,对比分析了麻花钻、阶梯钻两类刀具在不同振幅下对大直径、大厚度CFRP/TC4叠层结构制孔过程和质量的影响规律。结果表明:两类刀具最大轴向力随着振幅增大均呈上升趋势,阶梯钻可有效降低钻削最大轴向力;低频振动钻削能实现有效断屑并降低切削温度、提高孔径精度,阶梯钻作用效果更加显著;CFRP入口撕裂程度受切屑刮擦与振幅共同作用影响,切屑的刮擦及振幅增大均会导致入口撕裂程度增大,在适中的振幅下(0.1mm),阶梯钻可有效降低入口撕裂程度,并达到较好的加工精度。
The cutting process of low frequency vibration process is analyzed,and the change rules of cutting path and cutting angle in low frequency vibration drilling are obtained.The drilling process experiment is carried out,and the effects of twist drill and step drill on hole making process and quality of large diameter/thickness CFRP/TC4 stacks under different amplitudes are compared and analyzed.The results show that the maximum axial force of the two kinds of tools increases with the increase of amplitude,and the stepped drilling can effectively reduce the maximum axial force;Low frequency vibration drilling can effectively break chips,reduce cutting temperature,improve hole diameter accuracy,and the effect of step drilling is more remarkable;The tearing degree of CFRP inlet is affected by chip scraping and amplitude.The scraping of chip and the increase of amplitude will increase the tearing degree of CFRP inlet.The step drill can effectively reduce the tearing degree of CFRP inlet at a moderate amplitude(0.1mm)and achieve better machining accuracy.
作者
王福吉
栗盛开
付饶
刘帅
赵猛
Wang Fuji;Li Shengkai;Fu Rao;Liu Shuai;Zhao Meng(Key Laboratory of High-Performance Manufacturing for Advanced Composite Materials,Dalian University of Technology,Dalian,Liaoning 116024,China;不详)
出处
《工具技术》
北大核心
2023年第4期3-10,共8页
Tool Engineering
基金
国家重点研发计划(2018YFA0702803)
国家自然科学基金(52090053,52105432)
中央高校基本科研业务费专项资金(DUT21RC(3)002,DUT21ZD408)
大连市科技创新基金(2022JJ12GX027)
大连市顶尖及领军人才项目(2021RD08)。
关键词
叠层结构
振动钻削
振幅
复合材料
阶梯钻
stack material
vibration drilling
amplitude
composite material
step drill
