ISSN:
1662-9752
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:
This paper is concerned with the analysis of the forming load characteristics of aforward-backward can extrusion in both combined and sequence operation. A commerciallyavailable finite element program, which is coded in the rigid-plastic finite element method, has beenemployed to investigate the forming load characteristics. AA 2024 aluminum alloy is selected as amodel material. The analysis in the present study is extended to the selection of press frame capacityfor producing efficiently final product at low cost. The possible extrusion processes to shape aforward-backward can component with different outer diameters are categorized to estimatequantitatively the force requirement for forming forward-backward can part, forming energy, andmaximum pressure exerted on the die-material interfaces, respectively. The categorized processes arecomposed of combined and/or some basic extrusion processes such as sequence operation. Based onthe simulation results about forming load characteristics, the frame capacity of a mechanical press ofcrank-drive type suitable for a selected process could be determined along with securing the loadcapacity and with considering productivity. In addition, it is suggested that different load capacitiesbe selected for different dimensions of a part such as wall thickness in forward direction and etc. It isconcluded quantitatively from the simulation results that the combined operation is superior tosequence operation in terms of relatively low forming load and thus it leads to low cost for formingequipments. However, it is also known from the simulation results that the precise control ofdimensional accuracy is not so easy in combined operation. The results in this paper could be a goodreference for analysis of forming process for complex parts and selection of proper frame capacity ofa mechanical press to achieve low production cost and thus high productivity
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.949.pdf
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