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为实现铜箔微冲孔,以弹性体作为传力介质,采用试验方法研究弹性介质材料、厚度及驱动片厚度等参数对电磁辅助微冲孔的影响。结果表明,硅胶和聚氨酯橡胶适合于电磁辅助微冲孔,最佳厚度分别为3.0mm和1.0mm;驱动片厚度对磁场渗透和运动速度有较大影响。板料厚度相同时,微孔直径越小冲孔越困难,需要的能量越大;板料厚度越薄,相同能量下可冲出直径越小的孔;通过合理控制工艺参数,电磁辅助成形技术可在20μm的铜箔上冲出直径500μm的微孔。
In order to realize the micro-punching of copper foil, the influence of the parameters of elastic media, thickness and thickness of the driving plate on the electromagnetic assisted micro-punching is studied by the test method using the elastomer as the transmission medium. The results show that silica gel and polyurethane rubber are suitable for electromagnetic assisted micro-punching. The optimum thickness is 3.0mm and 1.0mm respectively. The thickness of the driving piece has a great influence on the magnetic field penetration and moving speed. The same sheet thickness, the smaller the diameter of the hole punching the more difficult, the greater the energy required; sheet thickness thinner, the same energy can punch out the smaller the diameter of the hole; through reasonable control of process parameters, electromagnetic assisted forming technology Pores with a diameter of 500 μm can be punched out on a 20 μm copper foil.