The Mechanics of Longitudinal Rolling of Tube through Grooved Rolls
Earlier theoretical analyses of longitudinal tube rolling have been based on equilibrium methods but such analyses have not yielded relationships which correlated satisfactorily with experimental results. Consequently a new approach, incorporating strain energy, the constant shear stress principle for friction, and the apparent strain concept, has been developed to enable roll load and other parameters to be predicted.
To simulate the hot rolling of steel, lead tubes, without internal support were rolled through two grooved rolls and measurements were made of pressure distribution, roll separating force, torque and other parameters.
The energy method shews an improvement over the equilibrium method as there is good agreement between the new theoretical predictions and the test results. The theory can be relied on for design or operational purposes.
KeywordsHomogeneous Deformation Roll Pressure Neutral Plane Tube Rolling Longitudinal Rolling
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- 1.A.S. Haleem (1978) An investigation into the longitudinal rolling of tubes through two grooved rolls, Ph.D. Thesis, University of Aston in BirminghamGoogle Scholar
- 2.I.M. Cole (1969) An investigation of the rolling of cylindrical tube by grooved rolls, Ph.D. Thesis, University of Aston in BirminghamGoogle Scholar
- 3.V.V. Shveikin and G.Ya Gun (1958) Specific pressure for tube rolling without a mandrel, Nauchnye Doklady Vysshei Shkoly, Metallurgiya, No. 2 pp 167–169Google Scholar
- 4.Ya. L. Vatkin (1954) The pressure of the workpiece on the rolls for the rolling of tubes without a mandrel, Obrabotka Metallov Davleniem, Sbornik III, MoscowGoogle Scholar
- 5.A.N. Kirichenko, The distribution of stress and specific pressure in the deformation zone for the reducing of tubes (1964) Proizvodstvo Trub, Vypusk 13, Ukrainskii Nauchno-Issled Ovatel’skii Trubni Institute, Moscowpp 37–44Google Scholar
- 6.P.J. Thompson and D.H. Sansome (1976) Apparent stra method for analysis of steady-state metal working operations, Metals Technology pp 497–502.Google Scholar
- 7.B. Avitzur, (1968) Metal forming processes and Analysis, McGraw-HillGoogle Scholar
- 10.G. Sachs and W.M. Baldwin (1946) Stress analysis of tube sinking, Trans. ASME pp 655–661.Google Scholar