The influence of the thickness of the plate on a deep forming operation of several stages
In this research, practical and analytical deep drawing of the several-stages design mold is produce hexagonal cup and also proved the influence of the thickness of the plate on the allocation of strain and laminating in curvature of the cup area for all stages of the drawing. Three stages deep drawing mold was designed and constructed to carry out the practical work required to produce a hexagonal cup of (28.25 mm by 24.5 mm) , (60 mm) high drawn from a circular flat plate (80 mm diameter), made from low carbon steel (1006–AISI). Analysis program (ANSYS11.0) to perform the finite element method to accomplish the analytical side of the search. Three types of thickness plate (= 0.5, 0.7,1 mm) with constant radius of curvature of punch equal to (=4) mm, radius of curvature of die equal to (=8 mm) and radius of curvature of wall of die (=4 mm) were used.
From the practical and analytical results of the three stages of drawing, it has been found that drawing load less than the more advanced stages of drawing operation on the wall of cup, maximum laminating take place at curvature of the cup area with plate thickness equal to (=0.5 mm) and maximum thickening take place at the at throat cup with plate thickness equal to (=1 mm), the maximum values of strains (radial, hoop, thickness and effective) take place at throat cup with plate thickness equal to (=1 mm).