ARTICLE PRODUCTION METHOD Russian patent published in 1995 - IPC

FIELD: metal pressure forming. SUBSTANCE: method comprises steps of preliminary fixing of an initial blank, having a square cross section, before placing it to a die relative that die by angular portions of the blanks; selecting a diagonal length of the cross section of the blank in a given range; placing the blank in the die by an axial action of a rolling-on punch in order to provide separation of the angular portions of the blank until the length of the diagonal, equal to a diameter of a ready product, is achieved; providing a reliable fixation of the blank in the die due to an enlarged surface of their mutual contact; then performing a deformation of the blank by the rolling-on punch in order to make the article, being round in a plan view. EFFECT: enhanced quality of articles. 1 cl, 2 dwg