针对某型机钛合金超塑成型口盖数控铣切焊缝时出现切口断裂的问题,分析产生原因,优化工艺方案及数控切削方式。通过试切验证,确定加工参数,对工艺过程进行固化,从技术上避免该问题的发生并总结出薄壁零件加工方法,为薄壁零件的优质加工提供技术支持。 Aiming at the problem of incision and breakage in numerical control milling and welding of titanium alloy superplastic forming flap of a certain type of machine, the cause of the incision fracture is analyzed, and the process scheme and the numerical control cutting mode are optimized. Through the trial cut verification, the processing parameters are determined, the process is cured, the occurrence of the problem is technically avoided and the processing method of the thin-walled parts is summarized, providing technical support for the high-quality processing of the thin-walled parts.