DIE SET FOR DRAWING IN TRANSFER PRESS Russian patent published in 1997 - IPC

FIELD: plastic metal working, namely sheet forming, drawing without thinning in transfer presses. SUBSTANCE: sheet blank is placed onto pressure ring. When drawing die moves downwards after contacting with blank part is drawn. Then pressure ring supporting flange of part being drawn descends and through studs acts upon cross piece sliding along guiding rod. Motion of cross piece downwards causes rotation of balance beams secured to stationary holder by pins due to engagement of roller supports with lower surface of said cross piece relative to said pins. Tie rods connected with balance beams follow their motion and rotate step of step bearing and simultaneously by means of limiters compress springs. When working stroke is over, at motion of drawing die upwards pressure ring returns to initial position, set by stopper due to action of non-compensated effort transmitted from balanced beams. EFFECT: enlarged manufacturing possibilities, enhanced reliability of deep drawing operation without thinning in transfer presses due to constant and also set according to drawing process pressing effort. 3 dwg