The technical and commercial potential of an incremental ring rolling process

Allwood, JM
Kopp, R
Michels, D
Music, O
Oztop, M
Stanistreet, TF
Tekkaya, AE
Tiedemman, I
A novel incremental ring rolling process is proposed, in which a narrow mandrel is moved both radially and axially. The process has potential to allow flexible near-net-shape forming of both hot and cold rings, and has been assessed by experiments on commercial cold ring rolling machines, a physical simulation using wax rings, and two finite element models. The results suggest that the process is technically feasible although the cycle time increases with the degree of flexibility and the stability of deformation depends on careful design of the tool path.


A modeling approach for analysis and improvement of spindle-holder-tool assembly dynamics
Budak, E.; Erturk, A.; Özgüven, Hasan Nevzat (Elsevier BV, 2006-01-01)
The most important information required for chatter stability analysis is the dynamics of the involved structures, i.e. the frequency response functions (FRFs) which are usually determined experimentally. In this study, the tool point FRF of a spindle-holder-tool assembly is analytically determined by using the receptance coupling and structural modification techniques. Timoshenko's beam model is used for increased accuracy. The spindle is also modeled analytically with elastic supports representing the bea...
ESKICIOGLU, AM; ESKICIOGLU, H (SAGE Publications, 1992-01-01)
Mathematical models used for determining optimal machining conditions are non-linear functions subject to non-linear constraints. In this paper models for unit production cost and unit production time for multi-pass milling operations are developed, taking cutting speed, depth of cut, feed and number of passes as design variables. The problem is then solved by three non-linear programming methods, namely the generalized reduced gradient (GRG) method, the sequential unconstrained minimization technique (SUMT...
A closed-form approach for identification of dynamical contact parameters in spindle-holder-tool assemblies
Özşahin, Orkun; Özgüven, Hasan Nevzat (Elsevier BV, 2009-01-01)
Accurate identification of contact dynamics is very crucial in predicting the dynamic behavior and chatter stability of spindle-tool assemblies in machining centers. it is well known that the stability lobe diagrams used for predicting regenerative chatter vibrations can be obtained from the tool point frequency response function (FRF) of the system. As previously shown by the authors, contact dynamics at the spindle-holder and holder-tool interfaces as well as the dynamics of bearings affect the tool point...
Proposal and evaluation of a KBE-RM selection system
Munguia, Javier; Bernard, Alain; Erdal Erdoğmuş, Merve (Emerald, 2011-01-01)
Purpose - The purpose of this paper is to propose and evaluate a novel tool for the assessment and selection of rapid prototyping (RP)/manufacturing (RM) systems as alternative processes for low-volume production in the machinery and equipment design sector. By analysing previous RP/RM selectors, this research addresses the necessary factors that a knowledge-based engineering (KBE) system must include for the analysis, comparison and ranking of candidate technologies.
Free forming of locally heated specimens
Okman, O.; Ozmen, M.; Huwiler, H.; Tekkaya, A. E. (Elsevier BV, 2007-06-01)
A novel manufacturing method is investigated, in which a steep temperature gradient within the workpiece is induced to facilitate material flow locally. By this method, complex shapes can be formed without complicated dies. The feasibility of the idea is analyzed experimentally and numerically. Local heating is realized either by means of induction or laser heating. Experiments using materials 16MnCr5, X5CrNi18/9, and Ti6Al4V have been conducted under various process conditions. These experiments have also ...
Citation Formats
J. Allwood et al., “The technical and commercial potential of an incremental ring rolling process,” CIRP ANNALS-MANUFACTURING TECHNOLOGY, pp. 233–236, 2005, Accessed: 00, 2020. [Online]. Available: