Superplastic forming process research of front aluminum alloy opening and closing mechanism hatch for multiple units

Abstract. In this paper, the forming process research of front opening and closing mechanism hatch for multiple units was carried out, industrial grade 5083 aluminum alloy selected as original material. The uniform rapid superplastic combined with hot stamping direct-reverse used to form body skin, cold argon arc welding were produce connection support, integral part obtained by finally, which solved problem poor environmental protection high ratio traditional FRP precision large complex thin-walled structural that cannot be achieved process. After development, finite element analysis, tests, good quality successfully manufactured. ultimate thinning rate 23.8%, overall wall thickness evenly distributed, deviation shape controlled within 1 mm, mechanical properties met relevant technical requirements.