摘要
针对航空航天发动机关键零件——镍基高温合金盘轴类零件的大深径比盲孔进行了电火花加工工艺技术研究。通过低刚性深盲孔零件结构特点分析,设计专用导向套、带冲液可调电极夹具等,以满足深径比>45、孔径φ≤5mm的深盲孔加工要求;通过优化工艺流程,合理确定粗、中、精加工工艺方法和余量,得到可实用化的加工速度;通过系统工艺试验,确定影响镍基高温合金加工特性的电火花工艺参数,得到快速、稳定、可靠加工的有关参数与条件。结果表明:电火花加工工艺方法是解决镍基高温合金盘轴类零件大深径比盲孔加工的有效方法,所加工零件满足了图纸要求。
It researches EDM technology of blind hole with large depth to diameter ratio in nickel- based superalloy plate and shaft parts. Through the low ri- gidity of deep blind hole part structure analysis, it designs the special oriented sleeve and adjustable liquid electrodes fixture to meet requirements of deep blind hole processing with the depth to diameter ratio 〉45, the aperture φ≤5mm. By optimizing the technological process, it determines allowance, coarse, medium and finishing process reasonably, and gets practical processing speed. Through system experiment process, it determines the nickel-based superalloy processing characteristics of EDM process pa- rameters, gets related parameters and conditions of fast, stable and reliable processing. Results show that the EDM processing method is effective to solve the large depth to diameter ratio blind hole of nickel-based superalloy, and the processing parts meet the drawing requirements.
出处
《航空制造技术》
北大核心
2014年第16期42-46,共5页
Aeronautical Manufacturing Technology
基金
04国家科技重大专项(2014ZX04001-111)
北京市科学技术研究院科技创新工程专项(PXM2014_178102_000006)资助
关键词
电火花加工
大深径比盲孔
镍基高温合金
低刚性
盘轴类零件
EDM Blind hole with large depth todiameter ratio Nickel-based superalloy Low rigid-ity Plate and shaft parts
