镍基高温合金电火花辅助电弧高效铣削技术

doi:10.7527/S1000-6893.2021.25615

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镍基高温合金电火花辅助电弧高效铣削技术

武鑫磊, 刘永红, 亓梁, 赵莅龙, 纪仁杰

中国石油大学(华东)机电工程学院, 青岛 266580

收稿日期:2021-03-31 修回日期:2021-04-28 发布日期:2021-06-29
通讯作者: 刘永红 E-mail:liuyh@upc.edu.cn
基金资助:
国家自然科学基金（51774316）；国家重点研发计划（2019YFE0105100）；山东省重点研发计划（2019GGX104068，GG201809250219）；山东省高等学校优秀青年创新团队（2019KJB016）

High-efficiency electrical discharge assisted arc milling of nickel-based superalloy

WU Xinlei, LIU Yonghong, QI Liang, ZHAO Lilong, JI Renjie

College of Mechanical and Electronic Engineering, China University of Petroleum (East China), Qingdao 266580, China

Received:2021-03-31 Revised:2021-04-28 Published:2021-06-29
Supported by:
National Natural Science Foundation of China (51774316); National Key Research and Development Project of China (2019YFE0105100); Key Research and Development Project of Shandong Province (2019GGX104068, GG201809250219); Science and Technology Support Plan for Youth Innovation of Universities in Shandong Province (2019KJB016)

摘要/Abstract

摘要： 镍基高温合金因具有独特的物理化学性能，在航空、航天和军事工业等领域得到了广泛应用。然而，国内外常用的镍基高温合金机械铣削方法存在着材料去除率低、成本高和刀具损耗大等问题。尤其用其加工航空航天领域的整体叶盘、涡轮盘、机匣、航天器连接框和航天器返回舱体等零件时，上述问题更加突出。针对这些问题，开展了镍基高温合金电火花辅助电弧高效铣削技术的研究工作。采用高纯石墨工具电极内冲液、外冲气的工作介质冲注方式，使用自行研制的电火花辅助电弧高效铣削数控机床，试验研究了不同工艺参数对加工镍基高温合金GH4169的材料去除率、电极相对损耗率、加工误差等工艺性能的影响关系，揭示了工件加工表面的微观结构特性。试验结果表明，加工镍基高温合金GH4169的材料去除率达11 523 mm³/min，电极相对损耗率约为1.5%，加工成本远低于机械铣削。

关键词: 电火花铣削, 电弧铣削, 电火花辅助电弧铣削, 高温合金, 材料去除率

Abstract: Nickel-based superalloys have been widely used in the aerospace and military industry due to their unique physical and chemical properties. However, the commonly used mechanical milling methods of nickel-based superalloys have some disadvantages, such as low material removal rate, high cost, and severe tool wear, which are prominent when processing integrated disks, turbine disks, gearboxes, connecting frames, and return cabins in the aerospace field. To solve these problems, high-efficiency electrical discharge assisted arc milling of nickel-based superalloy is studied, and a high-purity graphite tube is used as the tool electrode in this research. The outer working fluid is high-speed compressed air, and the inner working fluid is deionized water. A self-developed electrical discharge assisted arc milling CNC machine tool is used. The effects of different machining parameters on the material removal rate, relative electrode wear rate, and machining error of superalloy GH4169 are studied. The microstructures of the machined workpiece surface are also observed. The experimental results show that the material removal rate of nickel-based superalloy GH4169 can reach 11 523 mm³/min, with the relative electrode wear rate of about 1.5%, and the machining cost is much lower than that of conventional mechanical milling.

Key words: electrical discharge milling, arc milling, electrical discharge assisted arc milling, nickel-based superalloy, material removal rate

中图分类号:

V261.94

武鑫磊, 刘永红, 亓梁, 赵莅龙, 纪仁杰. 镍基高温合金电火花辅助电弧高效铣削技术[J]. 航空学报, 2022, 43(4): 525615-525615.

WU Xinlei, LIU Yonghong, QI Liang, ZHAO Lilong, JI Renjie. High-efficiency electrical discharge assisted arc milling of nickel-based superalloy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(4): 525615-525615.

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镍基高温合金电火花辅助电弧高效铣削技术

High-efficiency electrical discharge assisted arc milling of nickel-based superalloy

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