PATTERN SHAPE BLANKS PRODUCTION METHOD Russian patent published in 1995 - IPC

FIELD: pattern shapes blanks rolling. SUBSTANCE: method to produce blanks mainly of pattern shape provides for cutting of rolling by measured blanks, their feeding into zone of press, reduction of edge distorted areas with subjecting blank seats to efforts of end push and following rolling till finished piece. In the case width of wall reduction zone is chosen less than minimum space between seats and reduction of edge areas is exercised in several stages. On first stage wall form distortions are eliminated. On second stage seats are reduced till clearance disappear and seats levelling. On third stage wall is reduced with simultaneous application of end push efforts to seats. Then end push is taken off and wall is finally reduced till seats are brought to nominal size by width. EFFECT: pattern shape blanks production method is used in pattern shapes rolling production. 6 dwg