Paper Titles
Preface
Tailored Temperature Gradients in Hybrid Components: Influence of Variable Process Parameters under Cold and Preheated Conditions
p.1
Microstructure Modification of Hot Formed Shafts through Customised Spray Cooling from the Forming Heat
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Characterisation of the Flow Behaviour of Powder Metallurgical Semi-Finished Products for Lubricant-Impregnated Cold Forming Concepts
p.25
A Novel Modified SLAB Method Approach for Efficient Energy Assessment in Ring Rolling Showing Fishtail Effect
p.35
Fine-Blanking Punch Edge Control by Chamfering and Plasma-Nitriding under Excessive Load Situation
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Fast Inverse Identification of the Coefficient of Friction in Cold Strip Rolling Using a Physics-Informed Neural Network
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A Qualitative Study of the Contact Pressure Distribution in Cold Rolling
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Extension of the Lemaitre Damage Model to Account for Static and Dynamic Recrystallization Behavior
p.81

A Novel Modified SLAB Method Approach for Efficient Energy Assessment in Ring Rolling Showing Fishtail Effect

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Abstract:

Ring rolling (RR) is a widely used process for producing seamless rings, but its complex thermo-mechanical behavior often requires costly experiments or FEM simulations. This study presents a novel analytical method for predicting torque and energy in RR that explicitly accounts for the fishtail effect, a lateral deformation of the ring cross-section. The approach combines a slab-based mechanistic model with a regression linking fishtail deformation to the kinematic ratio between mandrel feed and ring rotation. Validation was performed via FEM simulations on an industrial AISI 1045 steel case, covering thirty conditions with varying feed rates and rotational speeds. Results show that conventional models ignoring fishtail can overestimate errors by over 60% for torque and 50% for energy, whereas the proposed method reduces errors below 15% in most cases. These findings highlight the importance of including fishtail effects, offering a fast, reliable, and efficient tool for early-stage RR process design and optimization.

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Periodical:

Materials Science Forum (Volume 1183)

Pages:

35-44

DOI:

https://doi.org/10.4028/p-Sau95E

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Cite this paper

Online since:

April 2026

Authors:

Cristian Cappellini*, Claudio Giardini, Gabriele Locatelli, Mariangela Quarto

Keywords:

FEM, Fishtail Effect, Ring Rolling, Slab Method

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Creative Commons CC BY 4.0

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