The Effect of Hold Time on the Spring Back Phenomenon In A V- Dies Bending Process


Bending process is the one important process in the sheet metal forming inmany industries, the main problem of bending process is the spring backphenomenon which is happens after removing the punch. This research involvestheoretical and experimental study of the effect of holding time on spring backvalue of sheet material in V-bending die with 900, with different rolling directionand different holding time (0,10,20,30) min. (Al –Si) alloy having the thickness of(2 mm) were employed as the work pieces material for all experiments. The resultsrevealed that as the hold time increases, the spring back decrease and spring backratio increases.