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航空发动机镍基合金叶片上的深小孔加工一直是航空制造业中难以解决的问题。介绍了一种用于深小孔加工的微细电解高效钻孔工艺。为了研究微细电解钻削加工过程中高转速螺旋微电极对深小孔加工精度和加工效率的影响规律,对加工间隙流场进行了仿真研究。仿真结果表明,一定转速下在电极表面所形成的绝缘气膜,可以极大减小甚至消除孔壁的二次电解作用,大幅提高加工精度;同时,加工区外的新鲜电解液因负压作用被强行压入加工间隙内,强化传质作用明显,可显著提高加工效率。最后,试验验证了以上仿真结论的正确性,表明微细电解高效钻削加工工艺在深小孔加工方面有着巨大的发展潜力和广泛的应用前景。
Deep hole machining on aero-engine nickel-base alloy blades has always been a problem that can not be solved in the aviation manufacturing industry. A high efficiency micro-drilling technology for deep and small hole machining is introduced. In order to study the influence law of high speed helical microelectrode on machining precision and processing efficiency of deep hole in the process of micro-electrolysis drilling, the flow field in the machining gap was simulated. The simulation results show that the insulating gas film formed on the electrode surface under a certain rotational speed can greatly reduce or even eliminate the secondary electrolysis of the pore wall and greatly improve the machining precision. Meanwhile, the fresh electrolytic solution outside the processing area is under negative pressure Forced into the processing gap, the role of mass transfer enhancement significantly, can significantly improve the processing efficiency. Finally, the test verifies the correctness of the above simulation results, indicating that EMD drilling has tremendous potential and extensive application prospect in deep hole drilling.