Open AccessDevelopment technique for deep drawing without blank holder to produce circular cup of brass alloy
Author(s) -
Ali Hassan Saleh,
Ammer Khalaf Ali
Publication year - 2015
Publication title -
international journal of engineering and technology
Language(s) - English
Resource type - Journals
ISSN - 2227-524X
DOI - 10.14419/ijet.v4i1.3516
Subject(s) - blank , brass , die (integrated circuit) , deep drawing , materials science , rotational symmetry , finite element method , ligand cone angle , cone (formal languages) , sheet metal , composite material , geometry , structural engineering , metallurgy , copper , engineering , mathematics , conical surface , algorithm , nanotechnology
Of this technique compared to the conventional deep drawing is that the circular cup can be carried out in single action press with limit In this paper a new mechanism for deep drawing was proposed to produce circular cup from thin plate without blank holder. In this technique the die assembly includes punch, die and die-punch. A 2D axisymmetric finite element model was built using DEFORM software. Effect of die geometry (half- cone angle) on maximum load, thickness distribution, strain distribution and effect of clearance ratio between punch and (die-punch) on the wrinkling of the cup were investigated. Three half-cone angles of die (15o, 30o and 45o) were used for forming sheet metal of brass (CuZn37) which had initial thickness of (1mm) at four clearance ratio (c/t) for die of 30o half-cone angle. Finite element model results showed good agreement with experimental results. Die of 30o half-cone angle with clearance ratio (c/t) of 0.9 gave the best product without wrinkling. The main advantage drawing ratio (LDR) of 1.86 and blank diameter to blank thickness ratio (d/t) < 86.