Tube hydroforming has already proved successful in sub frame and chassis applications. However, there has been limited uptake of this technology in the production of BIW structural components. Mainly due to the fact that standard tube making methods are restricted to production of tubes with a diameter to thickness ratio of 65:1 at best, where as typical BIW application would be more inline with a ratio of 100:1. The Corus Tubular Blank process enables a greater range of D/t ratio, and therefore a larger scope of manufacture for BIW parts. The major technical issue concerned with the manufacture of both Corus Tubular Blanks and Corus Tailor Welded Tubes (Corus Tubular Blanks made using LWTB’s sheets) is the effect of material elastic recovery after forming has taken place. It has been well documented in previously published literature that the magnitude of elastic recovery (springback) in a component is influenced by the material and forming properties. It is very difficult to have full control of the material properties. However, forming properties are controllable especially if the forming process is simple as in the case of the Corus Tubular Blank. Corus Tailor Welded Tubes introduce a complex combination of springback characteristics inherited from the constituent parent parts of the LWTB. This thesis provides a method of springback prediction, as well as indication of the important factors associated with springback. Highlighted is the ability of springback to be mitigation via means of increased forming force, in conjunction with the ability to predict the subsequent springback behaviour.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:638273 |
| Date | January 2004 |
| Creators | Mullan, H. B. |
| Publisher | Swansea University |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | https://cronfa.swan.ac.uk/Record/cronfa42927 |
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