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电解加工是航空发动机整体叶盘制造的主要技术之一,加工间隙内电解液流动的均匀性是影响加工稳定性和表面粗糙度的核心因素。针对叶栅通道电解加工,对比分析电解液侧流式下的正向流动与反向流动加工间隙内流场状态,通过数值仿真对比分析可知,正流方式下加工间隙内电解液流速较高,流场均匀性较好,故正流方式有利于叶栅通道电解加工。开展了电解液正流电解加工试验,结果表明,采用正流方式进行叶栅通道电解加工,轮毂粗糙度可达0.316μm,叶盆、叶背余量重复误差分别为0.096 mm,0.103 mm,为下一步叶片型面精加工提供了良好的条件。
Electrolytic machining is one of the main technologies in the manufacture of the whole leaf disk of aeroengine. The uniformity of electrolyte flow in the machining gap is the core factor that affects the processing stability and surface roughness. Aiming at the electrolytic machining of cascade channel, the state of flow field in forward flow and reverse flow machining gap under electrolyte side flow is comparatively analyzed. By comparative analysis of numerical simulation, it can be seen that the electrolyte flow velocity in the machining gap is higher in the positive flow mode, Flow field uniformity is better, so the positive flow mode is conducive to the cascade channel electrolysis. The positive electrolysis process of electrolyte was carried out. The results showed that the positive flow method was used to electrolyze the cascade channel. The roughness of the hub was up to 0.316μm. The repeated errors of the backside and the back were 0.096 mm and 0.103 mm, respectively Next blade profile finishing provides good conditions.