Approximate model to calculate foldover and strains during cold upsetting of cylinders. Part II. Use of the foldover model to estimate friction

Osama M. Ettouney; Kim A. Stelson

Approximate model to calculate foldover and strains during cold upsetting of cylinders. Part II. Use of the foldover model to estimate friction

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper addresses an approach to calculate the friction coefficient during nonuniform compression of cylinders. The approach combines new friction-calibration curves (prepared using the finite-element analysis) that relate friction to workpiece shape and the foldover model from part I. Foldover in upsetting is used in the same way that the change in internal diameter is used in the ring test to determine friction. However, the new approach has the advantage that measurements are taken directly from the workpiece. Comparisons of friction values calculated from the ring test and the new approach showed good agreement.

Original language	English (US)
Title of host publication	Computer Modeling and Simulation of Manufacturing Processes
Editors	B. Singh, Y.T. Im, I. Haque, C. Altan
Publisher	Publ by ASME
Pages	181-192
Number of pages	12
Volume	20
State	Published - Dec 1 1990
Event	Winter Annual Meeting of the American Society of Mechanical Engineers - Dallas, TX, USA Duration: Nov 25 1990 → Nov 30 1990

Other

Other	Winter Annual Meeting of the American Society of Mechanical Engineers
City	Dallas, TX, USA
Period	11/25/90 → 11/30/90

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Approximate model to calculate foldover and strains during cold upsetting of cylinders. Part II. Use of the foldover model to estimate friction. / Ettouney, Osama M.; Stelson, Kim A.
Computer Modeling and Simulation of Manufacturing Processes. ed. / B. Singh; Y.T. Im; I. Haque; C. Altan. Vol. 20 Publ by ASME, 1990. p. 181-192.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ettouney, OM & Stelson, KA 1990, Approximate model to calculate foldover and strains during cold upsetting of cylinders. Part II. Use of the foldover model to estimate friction. in B Singh, YT Im, I Haque & C Altan (eds), Computer Modeling and Simulation of Manufacturing Processes. vol. 20, Publ by ASME, pp. 181-192, Winter Annual Meeting of the American Society of Mechanical Engineers, Dallas, TX, USA, 11/25/90.

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AB - This paper addresses an approach to calculate the friction coefficient during nonuniform compression of cylinders. The approach combines new friction-calibration curves (prepared using the finite-element analysis) that relate friction to workpiece shape and the foldover model from part I. Foldover in upsetting is used in the same way that the change in internal diameter is used in the ring test to determine friction. However, the new approach has the advantage that measurements are taken directly from the workpiece. Comparisons of friction values calculated from the ring test and the new approach showed good agreement.

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Approximate model to calculate foldover and strains during cold upsetting of cylinders. Part II. Use of the foldover model to estimate friction

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