一种带加强筋槽超薄铝合金蒙皮成形工艺研究

Research on the Forming Process of Ultra-thin Aluminum Alloy Skin with Reinforcement Slot

某型号带加强筋槽超薄铝合金飞机蒙皮零件成形工艺复杂,成形过程中经常出现鼓动和翘曲变形。为解决此类问题,本文对带加强筋槽超薄铝合金蒙皮成形工艺进行研究,通过对比分析零件落压成形工艺和橡皮囊液压成形工艺方法、设计合理的模具结构、选择合理的毛料状态及下料尺寸,确定了该零件最终的成形工艺。结果表明:超薄铝蒙皮合金采用"CZ"料、下料尺寸为1260mmX360mm,橡皮囊液压成形的工艺方法能保证零件成形质量,降低制造成本,缩短零件生产制造周期。本文的研究成果在超薄铝合金蒙皮成形的实际生产中获得了应用。

As a result of a complicated forming process,bulge and buckling always occur in the process of forming the ultra-thin aluminum alloy skin part with reinforcement slot on a certain type of aircraft.In order to solve such problems,this paper studies this forming process with a comparative analysis on the pressure drop forming process and rubber cell hydro-forming process,an appropriate die structure design and a proper stock state and blanking size selection and finalizes the forming process of this part.It is concluded that the ultra-thin aluminum alloy skin made of the"CZ"stock with a blanking size of 1260mm 360mm can be formed to a satisfactory level of quality at a lower production cost and in a shorter production cycle using rubber cell hydro-forming process.The result of this paper has been applied to the forming process of ultra-thin aluminum alloy skin in practical production.