HARD ALLOY SHEARING DIE Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: die has a lower plate with a matrix, an upper plate, a punch-holder with punches, a remover and flexible members. The remover is connected with the lower plate by guiding columns. The punch-holder is connected with the upper plate by other guiding columns. One flexible member is placed between the punch-holder and the upper plate, and the other - between the punch-holder and the remover. The thickness of the first of the indicated flexible members is twice less than of the second one. When the upper plate is lowered it exercises through the upper flexible member the blank pressing through the punch-holder and the remover with greater rigidity. Then the lower flexible member is pressed and the puncture takes place. EFFECT: facilitated manufacture. 2 dwg