Outro De: cienciavitae
Plastic deformation technological process for production of thin wall revolution shells from tubular billets
— 2009
Informações chave
Autores:
Publicado em
Janeiro 2009
Resumo
This invention refers to a process of plastic deformation for production of thin wall revolution shells from tubular billets. The process consists in end-forming a hollow circular section billet, which can be composed of a multi-layered assembly, by using sharp edge internal domed shaped molds that are guided externally by a constraining sleeve. This mold-sleeve tool can be assembled in a press in order to generate the pressure forces necessary for the forming process. The plastic deformation can result in thin walled spheres or cylinders with domed ends. The resultant revolution shells have two opposite (polar) circular openings. Both the shells length as the polar hole diameter is mainly determined by the billets initial dimensions and mold domed geometry. An innovative flexible inner mandrel may be introduced to considerably improve overall shell characteristics, allowing reduction of shell polar opening diameter, giving control of along-meridian thickness, solving typical thin wall forming problems such as buckling, wrinkling and ruptures and improve both outer and inner surface quality. This mandrel can be discarded and/or recycled after forming. This invention enables a low-cost and high-rate process for production of structural revolution shells capable of being used as high-pressure vessels.
Detalhes da publicação
Autores da comunidade :
Luís Manuel Mendonça Alves
ist13976
Paulo António Firme Martins
ist12470
Versão da publicação
AO - Versão original do autor
Domínio Científico (FOS)
mechanical-engineering - Engenharia Mecânica
Idioma da publicação (código ISO)
eng - Inglês
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