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Characteristic Deformation Modes and Working Pressures in Static Heading of Short, Thick Walled Axi-Symmetric Tubular-Rods

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Proceedings of the Twenty-Fourth International Machine Tool Design and Research Conference

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Abstract

This paper presents some results of an experimental investigation made to ascertain the characteristic deformation and working pressures in quasi-static, incremental heading of short, thick-walled, cylindrical tubes clamped at one end. Three types of heading dies were used: a flat top, a hemi-spherical top and a flat top truncated-conical. The effect of varying the specimen’s initial dimensions — lo/Do ratios, and die profile shapes on variation in die load- die movement curves, specific pressure, the geometry of the deformed specimens and on’ the folding curves were studied and the results presented. A characteristic feature of the deformation mechanism noted during the tubular heading process was the formation of fold-over of the bore-wall material in the thick-walled tubes due to plastic shearing.

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Author information

Authors and Affiliations

  1. Applied Mechanics Division, The University of Manchester Institute of Science and Technology, UK

    N. R. Chitkara, C. M. Leech & J. M. Hale

Authors
  1. N. R. Chitkara
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  2. C. M. Leech
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  3. J. M. Hale
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Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering, University of Manchester Institute of Science and Technology, Manchester, UK

    B. J. Davies (Professor of Manufacturing Technology) (Professor of Manufacturing Technology)

Copyright information

© 1984 Macmillan Publishers Limited

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Chitkara, N.R., Leech, C.M., Hale, J.M. (1984). Characteristic Deformation Modes and Working Pressures in Static Heading of Short, Thick Walled Axi-Symmetric Tubular-Rods. In: Davies, B.J. (eds) Proceedings of the Twenty-Fourth International Machine Tool Design and Research Conference. Palgrave, London. https://doi.org/10.1007/978-1-349-81247-9_6

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