Wrinkling is a common failure when the sheet metal is formed in conventional spinning. Hence, a lot of work has been done to accurately forecast the flange wrinkling. In this paper, the finite element simulation and experiments are established to study the deformation characteristic of the aluminum-alloy hemispherical seal head in conventional spinning, the influence of elastic strain energy and elastic strain energy increment on flange wrinkling is found, and a theoretical flange wrinkling criterion of aluminum alloy is proposed. The results show that deforming forces causes the increases and fluctuation of flange’s elastic strain energy. Due to the increasing of elastic strain energy increment’s amplitude, the unstable range appears in fan shaped area surrounded by flange edge and active region of spinning roller, and then results in flange wrinkling. This research proposes a flange wrinkling criterion based on Drucker postulate and establishes calculation process. It is proved by the experiment that this criterion can accurately predict the flange wrinkling in spinning.
WAN Xumin，ZHAO Yixi，KONG Qingshuai，YU Zhongqi
. Research on Prediction of Flange Wrinkling in Conventional Spinning[J]. Journal of Shanghai Jiaotong University, 2017
, 51(11)
: 1312
-1319
.
DOI: 10.16183/j.cnki.jsjtu.2017.11.005
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