An Experimental Wide Ring Rolling Mill of Novel Design

  • J. B. Hawkyard
  • E. Appleton
  • W. Johnson
Chapter

Summary

An account is given of the design and initial testing of an experimental ring rolling mill having a somewhat novel form of construction. The mill is intended for basic studies into the mechanics of ring rolling, which appears to have received relatively little attention in the past, and the capabilities of this particular design will be investigated. The novel feature of the mill is in the mounting of the mandrel which operates within the ring during rolling. Commercial ring mills have a cantilevered mandrel, the end of which may be restrained by a pivotting arm during forming, whereas the present mill has a mandrel which retracts axially for loading and unloading and is symmetrically supported between roller bearings within a four-column frame during rolling.

It is believed that this arrangement provides better support to the mandrel, allowing the use of larger length-to-diameter ratios, for the rolling of cylinders and for multi-stage form rolling, for example.

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References

  1. 1.
    W. Johnson and G. Needham, 1968. ‘Experiments on ring rolling’, Intern. J. Mech. Sci., 10, 95.CrossRefGoogle Scholar
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    W. Johnson, I. Macleod and G. Needham, 1968. ‘An experimental investigation into the process of ring rolling or metal type rolling’, Intern. J. Mech. Sci., 10, 455.CrossRefGoogle Scholar
  3. 3.
    W. Johnson and G. Needham, 1968. ‘Plastic hinges in ring indentation in relation to ring rolling’, Intern. J. Mech. Sd., 10, 487.CrossRefGoogle Scholar
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    D. M. Potter, 1960. ‘Ring rolling’, Aircraft Prod., 22, 468.Google Scholar
  5. 5.
    R. Hill, 1950. Mathematical Theory of Plasticity, Clarendon Press, Oxford.MATHGoogle Scholar
  6. 6.
    R. Venter, W. Johnson and M. C. de Malherbe, 1971. ‘The plane strain indentation of anisotropic aluminium using a frictionless, flat rectangular punch’, J. Mech. Engng. Sci., Inst. Mech. Engrs, 13, 416–428.CrossRefGoogle Scholar

Copyright information

© Macmillan Publishers Limited 1973

Authors and Affiliations

  • J. B. Hawkyard
    • 1
  • E. Appleton
    • 1
  • W. Johnson
    • 1
  1. 1.Department of Mechanical EngineeringThe University of Manchester Institute of Science and TechnologyUK

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