CAJ | 학술논문

为实现带有微小内棱角穿透型窄槽的深度精度，消除内棱边圆角，提出了一种微细扁平成形电极穿槽电火花加工方法。该方法通过在线制作微细扁平电极，采用穿透成形加工方法，补偿加工中扁平电极损耗，实现微细窄槽的精密成形加工。在航空发动机压气机转子叶片上开展了验证性实验研究，加工出的缺陷槽宽度为85μm，深度为244μm，具有较明显的内棱角。
위실현대유미소내릉각천투형착조적심도정도，소제내릉변원각，제출료일충미세편평성형전겁천조전화화가공방법。해방법통과재선제작미세편평전겁，채용천투성형가공방법，보상가공중편평전겁손모，실현미세착조적정밀성형가공。재항공발동궤압기궤전자협편상개전료험증성실험연구，가공출적결함조관도위85μm，심도위244μm，구유교명현적내릉각。
In order to form the precision depth of micro through-slit with inside sharp edge,a novel micro EDM process was presented to machine the micro through slits using micro flat electrodes to form the micro slits. The micro EDM process includes on-line fabrication of flat electrodes and die-sinking EDM. During the die-sinking EDM, the flat-electrode wear can be compensated by a penetrating length as the electrode passing through slit wall. The machining experiments were carried out on a blade of aeroengine compressor for the artificial crack slits, and the micro slit (85 μm-wide and 244μm-depth) with sharp edges was fabricated successfully.