表面微坑低频振动加工刀杆的位移检测与控制

在分析蜂窝状表面微坑低频振动冲击加工原理的基础上,研究了低频振动冲击在缸套内表面形成分布规律和结构参数可控的微坑加工方法,提出了利用位置敏感器件（PSD）为核心构成在线二点法的刀杠位移检测系统,并将检测出来的实际参数传递给计算机,计算出刀杆位移的修正位置和修正余量,由伺服电机驱动刀具对表面微坑进行低频振动加工.该方法使微坑加工过程变得平稳,显著降低了由于振动引起的噪声,微坑分布和结构参数可控,且所有微坑均匀分布、相互独立,有效保证了微坑加工深度.

Measuring and controlling of arbor displacement in low frequency vibration machining surface for micro-pits

Based on analysis of the low frequency vibration machining principle of micro-pits on honeycomb surface,this work studied the distribution law of low frequency vibration impact formed on an inside-cylinder surface and presented a micro-pits machining method that could control the micro-pits structure parameters.Position sensitive device(PSD) is used as a core part to implement an online two points way's measuring system of arbor displacement,which transmits the measured parameters to computer for calculating the rectify position and surplus of arbor displacement.A servo-motor drives the reamer tool to machine the surface micro-pits in low frequency vibration.Application of the method shows that the micro-pits machining process is stable,and the noise generated by vibration is markedly reduced.All micro-pits distribute uniformly and are independent of one another,which can efficiently guarantee the machining depth of micro-pits.