ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The filling of the die corner in hydroforming of a tube with a box die was improved bycontrolling wrinkling under oscillation of internal pressure. In this process, a small wrinkle occursnear the die corner in the former stage, and then the wrinkle is eliminated in the latter stage becausethe flat bulge appears in the former stage due to the oscillation of internal pressure. A hydroformingprocess of steel tubes with a box die was performed in both three dimensional finite elementsimulation and experiment. The filling of the die corner for the mean linear pressure was not sufficientdue to large wrinkles appearing in the former stage, whereas bursting occurs for the peak linearpressure due to round bulging. On the other hand, the uniformity of wall thickness of the formed tubewas improved by the pulsating pressure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.344.461.pdf
