Investigation of the influence on the drawing ratio of radius of the die blank holder and punch with angular deep drawing dies

ABSTRACT(Master Thesis)INVESTİGATİON OF THE INFLUENCE ON THE DRAWING RATIO OFRADİUS OF THE DIE BLANK HOLDER AND PUNCH WİTH ANGULARDEEP DRAWİNG DIESMuhammet BALInstitute Of Science And TechnologyMechanical Education Department2007, Page: 81Deep drawing is one of the most important methods which formed sheet metals.Saucepans, perfume cans and tubes etc. products have been manufactured with deep drawingdies.In most country, deep drawing dies are mostly used in the industry. The profile blankholder and radius of punch and die is important for deep drawing dies. For this reason, die andblank holder surface have angles of α=0°, α=2.5°, α=7.5°, α=12.5°, α=15° and die and punchsurface have radiuses of R=10, R=8, R=6, R=4 mm respectively. The aim of this study is todetermine the effect of various angles of die-blank holder and various radiuses and die-punchsurface on the drawing ratio using DKP 37 sheet metal and the influence on the drawing ratio ofdie and punch forces, die blank holder force had been investigated. The highest and the lowestdrawing ratio being carried out for the die and punch die and blank holder. The highest drawingratio was obtained radius of die and punch of R=10 mm and die and blank holder of α=12.5° ofβ=2.3. The lowest drawing ratio was obtained die and blank holder of α=12.5° of β=1.8.Drawing ratio has increased according to radius of die and punch, die and blank holder angle;blank holder force. When die and blank holder angle was α=12.5° force of punch is the highestand α angle has increased, deep drawing ratio has increased.As a result, drawing ratio has increased according to radius of die and punch, die andblank holder angle; blank holder force. When die and blank holder angle was α=12.5° andradius of die and punch of R=10 mm, force of punch is the highest and α angle has increased,deep drawing ratio has increased.Key Words:Deep Drawing, Limit Drawing Ratio, Blank Holder Force, Die.