电解加工大深径比小孔及参数优化
Electrochemical Machining of Deep-Small Holes and Parameter Optimization
钟紫鹏 1苏国康 1李俊飞 1王瑞祥 1张永俊1
作者信息
- 1. 广东工业大学 机电工程学院,广州 510006;广州市非传统制造技术及装备重点实验室,广州 510006
- 折叠
摘要
为了提高深小孔结构电解加工的稳定性,文中探究了加工参数对稳定性的影响,建立了加工稳定性指标λ以定量研究,设计了冲液压力、加工电压、进给速度、端部非绝缘区域长度四个因素的正交实验.研究结果表明:在 15V电压、冲液压力为 0.3 MPa,进给速度 30 μm·s-1,电极非绝缘区长度 0.5mm时,加工深小孔的稳定性最好.在此工艺条件下使用中性电解液,顺利在SUS304 工件上加工出直径约 1.1 mm,深度为 200 mm 的通孔,深径比达 181,加工过程稳定.
Abstract
Parts with deep micro-hole structures find extensive applications in the fields of aerospace,medical devices and molds.Not only is this structure featured by small pore size and high depth-to-diameter ratio but also demands high-quality pore wall surfaces,posing a challenge in manufacturing.Deep-small holes can be electrochemically machined(ECM)with minimal tool loss,producing great surface quality.If neutral electrolyte is used for processing,electrolytic byproducts will obstruct the drainage channel,impairing the processing stability.Many metrics are employed in this research to examine the machining stability.To solve this problem,an indexλis built in the qualitative analysis.Four experimental parameters-hydraulic pressure,voltage,machining speed,and conductive zone length-are designed for an orthogonal test.The results show that when the voltage is 15 V,the flushing pressure 0.3 MPa,the feed speed 30 m·s-1,and the conductive zone length 0.5 mm,the most stable ECM process is obtained.Under these conditions,a SUS304 workpiece with a diameter of about 1.1 mm,a depth of 200 mm through the hole,and a depth-to-diameter ratio of 181 was successfully machined in neutral electrolyte.The machining process was steady.
关键词
电化学加工/深小孔/电解加工/中性电解液/正交试验/加工稳定性Key words
deep hole machining/electrochemical machining/neutral electrolyte/orthogonal test/processing stability引用本文复制引用
基金项目
广东省-教育部产学研结合项目(2010B090400381)
出版年
2024
NETL
NSTL
万方数据