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精密伺服阀滑阀副的阀芯台肩与阀套方孔之间的搭接量允差1～μm,生产中加工余量通常只有几微米或几十微米,加工精度要求在1μm之内,由于一般外圆磨床无轴向微量进给装置,加工精度难于保证,为此设计制造伺服阀阀芯轴向精磨闭环控制系统,使用电致伸缩型陶瓷微位移器推动顶尖作轴向微量进给,用电感传感器检测阀芯的实际磨削量,实现闭环反馈控制,对磨削量进行在线检测,使加工误差控制在1μm内,进给量可达40μm.从而解决了精密磨削加工中对刀难和砂轮磨损影响加工精度的问题。
Precision servo valve spool valve spool shoulder and valve sleeve square between the lap tolerance of 1 ~ m, the production of machining allowance is usually only a few microns or tens of microns, the processing accuracy requirements within 1μm, As the general cylindrical grinder without axial micro-feeding device, the processing accuracy is difficult to guarantee, for the design and manufacture of servo valve spool fine grinding closed-loop control system, the use of electrostrictive ceramic micro-displacement device to promote the top of the axial micro-into To the actual use of inductive sensors to detect the amount of grinding the valve to achieve closed-loop feedback control, the amount of grinding on-line testing, so that processing error control within 1μm, the feed rate of up to 40μm. To solve the precision grinding In the knife hard and wheel wear affect the accuracy of the problem.