中国机械工程2023，Vol.34Issue(24)：2936-2945,10.DOI:10.3969/j.issn.1004-132X.2023.24.005
基于硼酸溶液的电火花加工机理分析及实验研究
Mechanism Analysis and Experimental Study of EDM in Boric Acid Solution
摘要
Abstract
In-reactor maintenance of nuclear power plant components was typically performed by immersion in boric acid solution.In order to verify the feasibility of the EDM in boric acid solution,2200 mg/L boric acid solution was used as the discharge medium for processing experiments.DOE were adopted to explore the effects of processing parameters on material removal rate,inlet diameter of hole,surface quality and electrode loss in boric acid environment,the small hole forming was real-ized under optimal electrical parameters,and the size accuracy of small holes and the distribution law of recast layer were analyzed.The results show that the discharge process of boric acid solution as the working medium is intense and produces a lot of bubbles.The bubble-assisted discharge and the mech-anism of promoting chip removal may improve the material removal rate of EDM in boric acid solu-tion.Under the optimal parameters of peak current I=24 A,pulse width Ton=20 μs and interpulse Toff=20 μs,the thickness of recast layer on the pore surface is small and there is no crack.Boric acid solution is suitable as the working medium of EDM.The research results may provide theoretical sup-port for EDM of in-reactor parts maintenance in nuclear power plants.关键词
硼酸溶液/电火花加工机理/气泡/实验设计/再铸层Key words
boric acid solution/mechanism of electric discharge machining(EDM)/bubble/de-sign of experiment(DOE)/recast layer分类
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郑倩,张亚欧,高强,卢军成,杨翔钧,赵万生..基于硼酸溶液的电火花加工机理分析及实验研究[J].中国机械工程,2023,34(24):2936-2945,10.基金项目
国家自然科学基金(52175426) （52175426）
