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Plastic Flow through Taper Dies: A Threedimensional Analysis
Abstract:The plastic flow of metal in the extrusion process is an important factor in controlling the mechanical properties of the extruded products. It is, however, difficult to predict the metal flow in three dimensional extrusions of sections due to the involvement of re-entrant corners. The present study is to find an upper bound solution for the extrusion of triangular sectioned through taper dies from round sectioned billet. A discontinuous kinematically admissible velocity field (KAVF) is proposed. From the proposed KAVF, the upper bound solution on non-dimensional extrusion pressure is determined with respect to the chosen process parameters. The theoretical results are compared with experimental results to check the validity of the proposed velocity field. An extrusion setup is designed and fabricated for the said purpose, and all extrusions are carried out using circular billets. Experiments are carried out with commercially available lead at room temperature.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1073515Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1653
 Basily, B.B. & Sansome, D.H. 1976, "Some theoretical considerations for the direct drawing of section rod from round bar", International Journal of Mechanical Sciences, vol. 18, no. 4, pp. 201-208.
 Gatto, F. & Giarda, A. 1981, "The characteristics of the threedimensional analysis of plastic deformation according to the SERR method", International Journal of Mechanical Sciences, vol. 23, no. 3, pp. 129-148.
 Kar, P.K. & Das, N.S. 1997, "Upper bound analysis of extrusion of Isection bars from square/rectangular billets through square dies", International Journal of Mechanical Sciences, vol. 39, no. 8, pp. 925- 934.
 Nagpal, V. & Altan, T. 1975, "Analysis Of The Three-Dimensional Metal Flow In Extrusion Of Shapes With The Use Of Dual Stream Functions.", Proc. Third N.Am. Met. Res. Conf., Pittsburgh, Pennsylvenia,,pp 26-40.
 Sahoo, S K and kar, P K, 2000, Round-to-Square Extrusion Through Taper Die: A Three-dimensional Analysis. Manufacturing Technology Proc. of 19th AIMDT Conf.
 Sahoo, S.K., Kar, P.K. & Singh, K.C. 1999, "Numerical application of the upper-bound technique for round-to-hexagon extrusion through linearly converging dies", Journal of Materials Processing Technology, vol. 91, no. 1, pp. 105-110.
 Sahoo, S.K. 2003, "An analysis of plastic flow through polygonal linearly converging dies: As applied to forward metal extrusion", Journal of Materials Processing Technology, vol. 132, no. 1-3, pp. 286-292.
 Sahoo, R.K., Kar, P.K. & Sahoo, S.K. 2003, "3D upper-bound modeling for round-to-triangle section extrusion using the SERR technique", Journal of Materials Processing Technology, vol. 138, no. 1-3, pp. 499- 504.
 Sahoo, R.K., Samantaray, P.R., Sahoo, S.K., Sahoo, B. & Kar, P.K. 2009, "Round-to-channel section extrusion through linearly converging die: A three-dimensional analysis", International Journal of Advanced Manufacturing Technology, vol. 41, no. 7-8, pp. 677-683.
 Sahoo, S.K., Sahoo, B., Patra, L.N., Paltasingh, U.C. & Samantaray, P.R. 2010, "Three-dimensional analysis of round-to-angle section extrusion through straight converging die", International Journal of Advanced Manufacturing Technology, vol. 49, no. 5-8, pp. 505-512.