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:
Preform design in tube hydroforming implies the design of an intermediate shape betweeninitial tube and the final product enabling to be fabricated without defects and excessive loss ofmaterial. A carefully selected preform can contribute significantly to reduce production cost andimprove formability, since thinned sections may not be able to endure internal pressure duringexpansion whereas excessive thickening may lead to wrinkles. Generally, preform design inhydroforming was mainly carried out through the trial-and-error approach. Even though a series ofnumerical simulations for several predetermined preformed shapes were conducted, optimumconfiguration could not be obtained and could not be suggested the general procedure for preformdesign as well. In this work, a simple numerical approach to the preform design for formabilityenhancement was introduced based on the deformation history during forward hydroformingsimulation. The proposed approach was implemented to a hydroforming process of an automobilesubframe component in order to be satisfied the required specification after hydroforming, and theconceptual application has been proved to be successful on its effectiveness and feasibility. Therefore,it is shown that preform design approach proposed in this study will provide one of feasible methodsto satisfy the increasing practical demands for improvement of the formability in hydroformingprocesses
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.593.pdf
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