摘要
在椭圆振动切削时,相邻轨迹间残留高度难以消除。设计了一种非共振驱动类型的并联驱动振动辅助旋转切削装置,能主动调整金刚石刀尖的运动频率与幅值等参数,适应不同的工件材料表面加工。该装置采用两压电平行驱动,根据压电叠堆输入的不同而具有不同相位的余弦信号,可调整装置旋转运动平台的旋转角度,进而获得理想的运动形式。通过有限元仿真分析,在200 N输入力作用下的输出端输出位移分别为5.13、11.37、0.061μm,刀具绕刀位点旋转角度近似为8°,前三阶模态分别为3675.5、4232.3、5061.3 Hz。通过轨迹计算分析,当A_1=4μm、A_2=4μm、ψ_1=0°、ψ_2=30°时的旋转角度近似为5.5°;当A_1=4μm、A_2=2μm、ψ_1=30°、ψ_2=60°时的旋转角度近似为5.2°;当A_1=6μm、A_2=4μm、ψ_1=60°、ψ_2=90°时的旋转角度近似为5.8°。结果表明:该方案可实现刀具绕刀位点Y轴做高频往复摆动运动,满足设计要求。
It is difficult to eliminate the scallop height between adjacent trajectories in elliptical cibration cutting. The devised a parallel vibration assisted rotation cutting device which has a non-resonant drive style,it can adjust the parameters such as the movement frequency and amplitude of the diamond cutting tip,and has strong adaptability to the processing of different work-piece material surface. The device uses two piezoelectric parallel drives,according to the cosine signal with discrete phase in the input of the piezoelectric stack,the rotation angle of the rotating motion platform can be adjusted and the ideal motion form is obtained. Using the finite element simulation analysis,the output displacement can reach 5.13,11.37,0.061 μm under 200 N input force, and the rotation angle of the cutting tool around the cutting tool point is approximately 8°. The first three modes are 3675.5,4232.3,5061.3 Hz,respectively. Through the trajectory calculation and analysis,when A1=4 μm,A2=4 μm,ψ1=0°,ψ2=30° the rotation angle is approximately 5.5°,A1=4 μm,A2=2 μm,ψ1=30°,ψ2=60° the rotation angle is approximately 5.2°,and A1=6 μm,A2=4 μm,ψ1=60°,ψ2=90° the rotation angle is approximately 5.8°. The results show that the program can achieve high-frequency reciprocating oscillating motion of the Y-axis around the tool cutting to meet the design requirements.
作者
林洁琼
赵东坡
卢明明
谷岩
陈斌
LIN Jieqiong;ZHAO Dongpo;LU Mingming;GU Yan;CHEN Bin(School of Mechanical Engineering,Changchun University of Technology,Changchun 130012,China)
出处
《电加工与模具》
2019年第1期60-63,共4页
Electromachining & Mould
关键词
振动辅助旋转切削
非共振型
压电驱动
轨迹计算
有限元仿真
vibration assisted rotary cutting
non-resonant type
piezoelectric drive
trajectory calculation
finite element simulation
