摘要
针对小口径金属螺杆钻具定子曲率变化大且电解加工成形精度低、阴极设计难的问题,提出基于电位梯度分布的复杂阴极轮廓设计方法,建立能量法与剪力跃度相结合的阴极轮廓优化数学模型,设计电解加工用阴极结构并开展小口径金属螺杆钻具定子电解加工流场仿真,最终在自主设计的电解加工设备上实现了长2 m、内径29 mm、成形精度优于0.03 mm、表面粗糙度Ra0.64μm的小口径螺杆钻具定子的高质量加工。研究表明,采用能量法与剪力跃度相结合的方法可缩短电解加工阴极设计周期,改善小间隙流场均匀性,有效提高小口径金属螺杆钻具定子电解加工的成形精度。
In response to the problems of large curvature variation,low forming accuracy in electrochemical machining and difficult cathode design of small-caliber all-metal screw drilling tool stator,a complex cathode contour design method based on potential gradient distribution was proposed.A mathematical model for the cathode contour optimization by combining the energy method and shear jump was established,enabling the completion of cathode surface design for electrochemical machining.The flow field simulation of small-caliber metel screw drilling tool stator was carried out and the cathode structure was optimized.Finally,high-quality machining of small-diameter screw drilling tool stator with a length of 2 m,inner diameter of 29 mm,forming accuracy better than 0.03 mm and surface roughness Ra0.64µm was achieved on a self-designed electrochemical machining equipment.The research showed that the combination of the energy method and shear jump can shorten the cathode design cycle in electrochemical machining,significantly improve the uniformity of the small-gap flow field and the forming accuracy of electrochemical machining.
作者
周嘉凯
宋温馨
邓雯
张静静
唐霖
ZHOU Jiakai;SONG Wenxin;DENG Wen;ZHANG Jingjing;TANG Lin(School of Mechatronic Engineering,Xi'an Technological University,Xi'an 710021,China)
出处
《电加工与模具》
北大核心
2025年第6期36-41,共6页
Electromachining & Mould
基金
陕西省重点科研创新团队项目(2023-CX-TD-24)
陕西省产业化服务项目(23JC041)
陕西省教育厅青年创新团队建设科研计划项目(22JP032、23JP069、24JP084)
西安市科技计划科学家+工程师队伍建设项目(23KGDW0003-2022)。
关键词
小口径金属螺杆钻具
定子
电解加工
阴极设计
smalldiameter metal screw drilling tool
stator
ECM
shaped cathode design
