摘要: |
研究电极内高速气体冲刷和电极外高速液体冲刷排屑(气液组合高速电火花加工)的高速电火花铣削加工技术。电极管外的液体用来压缩和冷却气体介质,它能够增加气体介质的排屑能力和冷却加工间隙的能力。通过对比研究纯气体、纯液体和气液组合三种介质模式的高速电火花铣削试验,发现和气中电火花加工相比,气液组合电火花加工的材料去除率可以提高23%,宽度过切量可以减少15%,并获得相似的表面粗糙度。和液中电火花加工相比,气液组合电火花加工的优势体现在:表面粗糙度可以降低30%,宽度过切量降低50%,重铸层厚度降低82%,微裂纹明显减少。 |
关键词: 电火花加工;高速加工;气液组合电介质;重铸层 |
基金项目:“十三五”装备预研共用技术(41423030406);“十三五”装备预研领域基金重点项目(61409230307) |
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High-speed EDM Milling with In-gas and Outside-liquid Electrode Flushing Techniques |
Liu Xiaoyong1, Shen Yang2, Chen Jilun2
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1.First Military Representative Office of CPLA Rocket Army Equipment Department in Beijing Area;2.Capital Aerospace Machinery Co., Ltd.
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Abstract: |
This study investigates the high-speed electrical discharge machining (EDM) milling process with high-speed gas flushing in electrode inner and liquid in outer (gas-liquid high-speed EDM). The liquid in electrode outer is used to compress and cool the gas dielectric, which can add to the capacity of expelling the debris and cooling the machining gap for gas dielectric. Comparative milling experiments of high-speed EDM using gas, liquid and gas-liquid as dielectric were conducted. Compared to gas EDM, the MRR of gas-liquid EDM can improve 23% and the WOC can reduce 15% with the same SR. Gas-liquid EDM shows advantages over the liquid EDM in reducing 30% SR, 50% WOC, 82% re-solidified layer thickness and significantly fewer micro-cracks. |
Key words: EDM;high-speed machining;air-liquid dielectric;re-solidified layer |