高强铝合金薄壁高筋大型壁板精确成形制造技术研究

针对现有铝合金薄板加筋条铆接或轧制厚板铣削的制造方式已经难以满足新型运载火箭舱段壁板在轻量化、高性能和低成本快速制造等方面的发展需求,从挤压成形所具有的高效率、高成形精度和良好的稳定性等特点出发,围绕高强韧高成形性可焊铝合金设计、高纯均质熔铸工艺、挤压流变整体成形以及复杂断面构件热处理调控的研究,提出采用带筋筒形件挤压开坯、精近成形后剖展的方法,制造宽幅薄壁高筋壁板,在降低宽幅薄壁高筋壁板对工装高要求的同时提高成形稳定性,并兼具高效、低成本、高性能等特点,能够支撑轻质高强薄壁大型舱段的高性能、低成本、高效制造。

Research of Precise Manufacturing Technology for Large Thin Wall Panel with High Ribs Made of High Strength Aluminum Alloy

The existing manufacturing methods including thin plate with riveting ribs or milling of rolled plates have been difficult to meet the development needs of new launch vehicle cabin wall panels in terms of light weight, high performance and low cost and rapid manufacturing. Based on the high efficiency, high forming accuracy and good stability, the research focuses on the design of novel ultra-high strength aluminum alloy, high-purity homogeneous casting process, integral extrusion, and heat treatment control of complex cross-section components. A new method of symmetrical extrusion of ribbed cylindrical parts and dissected after precise close-form thinning to manufacture thin wall panel with high ribs is proposed, with which the requirementof industrial equipment for wide-width thin-wall panel with high ribs is reduced,and the forming stability is improved. Also, this method is high efficiency, low cost and high performance, which supports the efficiency manufacture of light weight and high-strength thin-wall large-sized cabins with high performance and low cost.