An Investigation of the Rolling of Cylindrical Tube by Grooved Roll


The objective of this work has been the investigation of the processes in which tubes are rolled in the longitudinal mode through two driven, grooved rolls. These processes may be categorised as follows:- (i) Sinking, which is the simplest procedure, and in which the tube is passed through the rolls unconstrained and without internal support. (ii) Stretch-reducing, which is similar to sinking, but with the addition of axial tensions to the tube during rolling. (iii) Mandrel Rolling, in which the tube is supported internally by a bar which is free to move with the tube. (iv) Plug Rolling; this process, of rolling on a fixed mandrel, is the least used and has not been reproduced here. Knowledge is required of the way in which the roll separating force, rolling torque, and load distribution round the groove, vary for different conditions of rolling, e.g. the amount of deformation carried out in a roll stand, the magnitude of axial tensions, and whether the bore of the tube is unsupported or on a mandrel. Particular emphasis has been placed on the measurement of the load variation in the are of contact and round the groove, by the use of novel pin loadcells, A wide-ranging review of the development and application of this technique is presented. The almost entirely foreign publications concerned with these rolling processes are also reviewed at length. The setting up of an experimental mill for the rolling of lead tube as an analogue material for hot steel, with the measurement of all the parameters, is described. Results are presented of rolling trials in the three configurations enumerated above, and considerations are made of theoretical treatments of the processes, using equilibrium approaches, emanating from Russian sources. The complexities of the processes and the difficulties of analytical treatment are demonstrated, and further investigations are proposed.

Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
Additional Information: Copyright © Cole, 1969. I.M. Cole asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately.
Institution: Aston University
Uncontrolled Keywords: cylindrical tube,grooved roll
Last Modified: 08 Dec 2023 08:42
Date Deposited: 13 Feb 2014 10:24
Completed Date: 1969
Authors: Cole, I.M.

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