METHOD FOR MAKING CYLINDRICAL ARTICLES WITH BOTTOM FROM SQUARE BLANK AND APPARATUS FOR PERFORMING THE SAME

摘要

FIELD: plastic metal working, namely deep drawing of cylindrical articles. SUBSTANCE: method comprises steps of drawing without thinning flange portion of blank and drawing with local thinning in zone for setting thickness around apotherms of blank; realizing drawing by means of punch with use of die; simultaneously performing drawing without thinning and drawing with local thinning; using non-rigid flat holder for pressing blank flange for providing drawing process. Gap value between punch and die Z is equal to 0.95 So or less than that value; radius R of drawing edge of die is in range (9 - 11)So or less. EFFECT: lowered corrugation degree, possibility for drawing part by one transition. 2 cl, 4 dwg