Rib Filling Behavior in Spinning of 2219 Aluminum Alloy Tubes with Helical Grid-stiffed Inner Ribs

LUY Wei; GONG Yili; REN Zhipeng

doi:10.3969/j.issn.1674-6457.2025.12.016

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (12) : 147-156. DOI: 10.3969/j.issn.1674-6457.2025.12.016

Light Alloy Forming

Rib Filling Behavior in Spinning of 2219 Aluminum Alloy Tubes with Helical Grid-stiffed Inner Ribs

LUY Wei^1,*, GONG Yili², REN Zhipeng²

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Abstract

The work aims to reveal the inner rib filling height law and its influencing factor in flow spinning of 2219 aluminum alloy tubes with helical grid-stiffed inner ribs so as to provide a basis for the active control of the inner rib filling height. Inner rib filling height and its influencing mechanism under different spinning parameters such as feed rate, thickness reduction, fillet radii and attack angle of rollers were obtained through single-factor sample design combined with finite element simulation. The results showed that an increase in the feed rate led to an increase in the material accumulation, and an increase in the thickness reduction resulted in an increase in the material accumulation and an enhanced tendency of rib filling. Therefore, the inner rib filling height significantly increased with the increase in the feed rate and thickness reduction. The increase in the fillet radii of rollers had a slight impact on the material accumulation. Although the increase in the attack angle of roller enhanced the degree of material accumulation, it reduced the tendency of rib filling. Therefore, the inner rib filling height did not show significant change with the increase in the fillet radii and the attack angle of rollers. In conclusion, feed rate and thickness reduction are the two main spinning parameters that affect the inner rib filling height. Increasing feed rate can improve the material accumulation, and increasing thickness reduction not only improves the material accumulation but also enhances the tendency of rib filling, resulting in a significant increase in the inner rib filling height as the feed rate and thickness reduction increase.

Key words

helical grid-stiffed inner rib / tube / flow spinning / inner rib filling / processing parameter

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LUY Wei, GONG Yili, REN Zhipeng. Rib Filling Behavior in Spinning of 2219 Aluminum Alloy Tubes with Helical Grid-stiffed Inner Ribs[J]. Journal of Netshape Forming Engineering. 2025, 17(12): 147-156 https://doi.org/10.3969/j.issn.1674-6457.2025.12.016

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