METHOD FOR DRAWING BLANKS OUT OF SHEET MATERIAL

摘要

processes for making blanks of sheet material by drawing, possibly in electrical engineering and other industry branches for producing hollow blanks. SUBSTANCE: method comprises steps of blanking article and simultaneously shaping it for subsequent drawing; at blanking forming cup in the form of truncated cone whose small diameter is equal to diameter of drawing punch. Inclination angle of cup generatrix is equal to 5-7 degrees. At drawing cup in the form of truncated cone is placed in turning of die in such a way that its less diameter is turned upwards relative to punch stroke direction. EFFECT: enhanced quality of blank due to its improved stability and elimination of crimping. 2 dwg