Aluminum Alloy Grid Rib Cylinder Strong Spinning Forming Process

XU Hengqiu; GAO Jingbo; HUANG Tao; GUO Yaming; MU Chongli; CHEN Kai

doi:10.3969/j.issn.1674-6457.2026.08.007

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (8) : 82-88. DOI: 10.3969/j.issn.1674-6457.2026.08.007

Key Technologies for Precision Forming of High-end Energy and Aerospace Equipment Components

Aluminum Alloy Grid Rib Cylinder Strong Spinning Forming Process

XU Hengqiu^*, GAO Jingbo, HUANG Tao, GUO Yaming, MU Chongli, CHEN Kai

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Abstract

The work aims to reveal the influencing factors of the filling rate of 3 350 mm-level large-diameter aluminum alloy cylinder segments with cross-grid ribs, uncover the flow and filling patterns of billets and their main influencing factors under roller action, and provide a theoretical foundation for future lightweight rocket manufacturing applications. A 2219 aluminum alloy grid rib cylinder was formed using strong spinning, and the effects of the thinning rate, feed ratio, and billet wall thickness on rib filling during forming were analyzed. The study found that increasing the thinning rate enhanced filling height, with maximum rib filling achieved at a 60% thinning rate. However, the rib filling rate declined when the thinning rate exceeded 50%. A feed ratio between 0.6 and 0.8 ensured optimal filling, while excessively low ratios caused diameter expansion and excessively high ratios led to uneven filling, both reducing the filling rate. A billet wall thickness of 15 mm yielded good filling, whereas lower thicknesses may result in localized tearing defects, and thicker walls caused metal to flow forward excessively. In the overall spinning of aluminum alloy cylinder segments, the thinning rate and the feed ratio significantly affect rib filling. Increasing the thinning rate promotes rib filling but, when exceeding 60%, excessive metal flow toward the spinning direction creates gaps in the opposite region, thereby reducing the overall filling rate. Both insufficient diameter expansion at low feed ratios and incomplete billet deformation at high feed ratios due to increased per-rotation advancement lead to uneven rib heights and negatively affect the cross-grid rib filling rate.

Key words

grid rib cylinder / strong spinning / rib filling rate / expansion amount / surface defect

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XU Hengqiu, GAO Jingbo, HUANG Tao, GUO Yaming, MU Chongli, CHEN Kai. Aluminum Alloy Grid Rib Cylinder Strong Spinning Forming Process[J]. Journal of Netshape Forming Engineering. 2026, 18(8): 82-88 https://doi.org/10.3969/j.issn.1674-6457.2026.08.007

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