摘要
针对复杂形状的闭式、半开式涡轮叶盘的高效加工需求,提出了一种应用于高速电弧放电加工的新型叠片电极。将与成形电极形状对应的多层电极叠在一起,在每层电极表面加工出特殊设计的流道,从而为电弧加工所需的强内冲液提供流道,以保障高速电弧放电加工所需的流体动力断弧。利用叠片电极的冲液孔,可施加高速工作液流场,对放电过程中的电弧拉长甚至切断,同时带走热量及碎屑,实现对高速电弧放电加工的有效控制。对叠片电极的设计建模进行了介绍,包括外形及内部流道孔槽的设计,通过进给轨迹优化实现了特定形状的沉入式加工,并进行了高速电弧放电加工试验,验证了叠片电极加工闭式零件型腔的可行性,为后续工作提供了有价值的理论及参考数据。
According to the machining requirements of shrouded turbine blisks with complex shapes,a new laminated electrode to perform blasting erosion arc machining（BEAM） is proposed. The laminated electrode is composed of multiple electrode layers which formed the required outline of the corresponding solid electrode for die-sinking machining. Special designed flow channels are machined on the surface of each electrode layer,therefore the dielectric fluid can flow through to provide intensive inner flushing and enable the hydrodynamic force to break the arc during BEAM process. The flow holes on laminated electrode are helpful to flush heat and debris away from the gap,which can make the arc machining process stable. The design of laminated electrode including the outline geometry and inner flow channels is discussed. By feeding in a proper path,die-sinking BEAM was realized in the experiment. This process is practical to machine turbine blisks with semi-closed cavities,and useful theory and data is given for reference of further research.
出处
《电加工与模具》
2015年第6期6-9,共4页
Electromachining & Mould
基金
国家自然科学基金重点资助项目(51235007
51575351)
关键词
叠片电极
高速电弧放电加工
内冲液
闭式叶盘
流道
laminated electrode
blasting erosion arc machining
inner flushing fluid
shrouded blisks
flow channels
作者简介
王春亮，男，1990年生，硕士研究生。
