Spiers, R.M. (1967). An Investigation of the Direct Extrusion Process with the Application of Oscillatory Energy. Masters thesis, Aston University.
Abstract
The plastic working of metals with a superposition of oscillatory energy has be on studied extensively by a large number of investigators. A reduction in the yield stress, and a lowering of the frictional forces between the deforming metal and tools are the main claims of the effects of oscillatory stresses, The objectives of this thesis were: (1) To summarise the historical and technical developments of metal deformation with the application of oscillatory energy, with particular reference to the extrusion and forging processes (2) To undertake research on the use of oscillatory stresses in the extrusion process. The cold extrusion of commercially pure aluminium and pure lead was undertaken through square and curved profile dies, with and without oscillatory energy on a 100 tonf Avery testing machine. Longitudinal force variations having a maximum amplitude of 2 tonf within a frequency range of 20 to 200 c/s, were developed from an electrohydraulic power unit. The extrusion load, punch displacement, force and amplitude of die oscillation were measured with and without oscillatory energy....
Publication DOI: | https://doi.org/10.48780/publications.aston.ac.uk.00022750 |
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Divisions: | Aston University (General) |
Additional Information: | Copyright © Spiers, R.M. 1967. R.M. Spiers 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 |
Last Modified: | 12 Jun 2025 14:44 |
Date Deposited: | 10 Jun 2014 15:00 |
Completed Date: | 1967 |
Authors: |
Spiers, R.M.
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