Journal of the Japan Society for Technology of Plasticity
Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586
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Finite Element Analysis for Rolling of Asymmetric Product in Three-roll-type and Two-roll-type Ring Rolling Process
— Comparison of Rolling Characteristics in Ring Rolling Process III —
Toshifusa NAKAMIZOMorihiko NAKASAKIHiroshi UTSUNOMIYA
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2012 Volume 53 Issue 616 Pages 445-449

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Abstract

Hot ring rolling is a useful process for producing large seamless rings. The ring rolling mills are classified into two types, i.e., two-roll-type and three-roll-type by roll layout. In our previous studies, the deformation characteristics in the three-roll-type ring rolling process have been investigated experimentally and numerically. In this study, a numerical simulation of the asymmetric product was performed by FEM together with the ALE method. The relative velocity between the ring and the rolls in the three-roll-type ring rolling process is low compared with that in the two-roll-type ring rolling process because of the roll layout. The reduction in the relative velocity improves the surface condition of the material and roll life. In the three-roll-type ring rolling mill, the rotation axes of the two main rolls lean from the horizontal axis. Therefore, the circumferential velocity of the main rolls has a transverse component in the roll bite. This velocity component introduces ring deformation toward the z-direction in the roll bite. In the production of asymmetric products, three-roll-type ring rolling has an advantage of formability over the two-roll-type ring rolling.

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© 2012 The Japan Society for Technology of Plasticity
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