Effect of Process Parameters on L-shaped Ring Parts Formed through Rolling and Expanding with Special-shaped Conical Rollers

GE Xiaoyu; PEI Mengmeng; LI Boqiong; QI Huiping

doi:10.3969/j.issn.1674-6457.2026.10.023

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (10) : 230-238. DOI: 10.3969/j.issn.1674-6457.2026.10.023

Advanced Manufacturing Technology and Equipment

Effect of Process Parameters on L-shaped Ring Parts Formed through Rolling and Expanding with Special-shaped Conical Rollers

GE Xiaoyu¹, PEI Mengmeng¹, LI Boqiong^2,*, QI Huiping^1,*

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Abstract

The work aims to elucidate the effect of feed rate and rolling ratio on the uniformity of temperature and equivalent plastic strain distribution during the rolling and expanding of L-shaped rings with conical rollers, thereby providing a theoretical basis for the development of this process. With the ABAQUS finite element analysis platform and the dynamic explicit integration algorithm, a three-dimensional thermal-force coupling numerical simulation model was developed for the radial and axial compound rolling process of ring parts with irregular cross-sections. A systematic study was conducted to analyze the spatial distribution characteristics of temperature and equivalent plastic strain during the hot rolling and expanding process of special-shaped ring parts, with particular emphasis on the conical roller's feed rate and the ring's rolling ratio as key affecting parameters. Raising the feed rate resulted in an increase in the ring's average temperature, whereas the equivalent plastic strain tended to decrease. Additionally, both the temperature field and equivalent plastic strain distribution became more uniform. At a conical roller feed rate of 2 mm/s, the uniformity of the overall temperature and equivalent plastic strain distribution in the ring was favorable. As the rolling ratio of the ring increased, the overall temperature showed a decreasing trend, while the equivalent strain gradually increased. Furthermore, the uniformity of the overall thermal distribution within the ring became more uniform, yet the uniformity of the equivalent strain showed a gradual deterioration. At a rolling ratio of 1.6, the distribution of equivalent plastic strain in the formed part exhibited acceptable uniformity. During the rolling forming process of special-shaped ring parts, a higher feed rate enhances the fluidity of the metal and improves the uniformity of temperature and equivalent strain distribution throughout the entire ring. Conversely, a reduced rolling ratio enhances the uniformity of the overall equivalent strain distribution but marginally reduces thermal uniformity.

Key words

special-shaped / finite element simulation / radial-axial rolling / hot rolling / ABAQUS

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GE Xiaoyu, PEI Mengmeng, LI Boqiong, QI Huiping. Effect of Process Parameters on L-shaped Ring Parts Formed through Rolling and Expanding with Special-shaped Conical Rollers[J]. Journal of Netshape Forming Engineering. 2026, 18(10): 230-238 https://doi.org/10.3969/j.issn.1674-6457.2026.10.023

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