微细电火花块反拷加工机床关键零部件设计与实验

Key Components Design and Experiment of Micro Machine Tool for Block Electrode Discharge Grinding

设计并研制了一台微细电火花块反拷加工机床并对其关键零部件进行了详细的介绍,该机床主要由镶嵌陶瓷V型主轴系统、高精密的微三维运动平台、杯状工作液槽以及可转动的块电极辅助夹具构成。采用可转动的块电极辅助夹具可以在线修正工具电极与块电极之间的安装位置关系,减少块电极反拷平面与工具电极回转轴线之间的平行度误差。应用该机床并采用径向进给的反拷方式,成功的加工出了直径约为400μm,长度为18.2mm,长径比达到45的微细电极。

A micro machine tool for block electrode discharge grinding hasbeen designed and fabricated,the key components of the micro machine tool are introduced detailly.The micro machine tool is composed of an embedded ceramic V-spindle system,a high precision micro three-dimensional motion platform,a cupped working groove and a rotatable auxiliary fixture for block electrode.The installation position relationship between the tool electrode and the block electrode can be revised online through using the rotatable auxiliary fixture for block electrode,which is in order to diminish the parallelism error between the anti-copy plane of block electrode and the rotation axis of tool electrode.A micro tool is fabricated successfully by the way of using radial feed in the micro machine tool,the diameter and length of the micro tool is 400um and 18.2mm,respectively.The aspect ratio of the micro tool reaches to 45.