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:
Combined extrusion processes generally have advantages of forming in terms of theminimum deformation power since the material is pressed through two or more orificessimultaneously. This paper is concerned with the analysis of forming load characteristics of aforward-backward can extrusion process using thick-walled pipe as an initial billet. The combinedtube extrusion process was analyzed by using a commercial finite element code. A thick-walled pipewas selected as an initial billet and the punch geometry has been chosen on the basis of ICFGrecommendation. Several tool and process parameters were employed in this analysis and they arepunch nose radius, backward tube thickness, punch face angle, and frictional conditions, respectively.The main purpose of this study is to investigate the effect of process parameters on the forcerequirements in combined extrusion process. The possible extrusion process to form aforward-backward tube parts in different process sequences were also simulated to investigate theforce requirements in sequential operations, i.e. separate operations. It was easily concluded from thesimulation results that lower forming load was predicted for the combined extrusion, compared tothose for separate sequential operations. It was also revealed that the punch nose radius and the punchface angle have little effect on the force requirements and the forming load increases significantly asthe frictional condition along tool-workpiece interface becomes severe. The simulation results in thisstudy suggest that the combined extrusion process has strong advantage in terms of forcerequirements as long as the simultaneous material flow into multiple orifices could be closelycontrolled
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.649.pdf
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