RING PART STRAIGHTENING-CALIBRATING DIE Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: ring blank is laid on a lower plate and an upper plate is lowered on it. A central wedge in the form of a truncated pyramid inner punch sections, and also outer punch sections are fastened on the upper plate. When the upper plate the outer plungers embrace the ring blank, and the inner punch sections moving apart under the action of a central wedge straighten and calibrate it. A suspension providing correction of the ring blank may be pivotally mounted at least on one of the outer punch sections. EFFECT: improved structure. 2 cl, 3 dwg