公开(公告)号：US4924586A

公开(公告)日：1990-05-15

申请号：US279009

申请日：1988-12-02

申请人： Harold B. King, Jr. ,  Donald G. Muncy ,  Charles W. Sutherland

发明人： Harold B. King, Jr. ,  Donald G. Muncy ,  Charles W. Sutherland

IPC分类号： B21D47/00 ,  G21C3/34

CPC分类号： G21C3/3424 ,  G21Y2002/202 ,  G21Y2002/205 ,  G21Y2002/302 ,  G21Y2004/30 ,  G21Y2004/401 ,  Y02E30/40 ,  Y10T29/531 ,  Y10T29/53187

摘要： To form longitudinally spaced pairs of angularly spaced stops in the walls of fuel rod-positioning ferrules utilized in nuclear fuel bundle spacers, the ferrules, cut from tubular stock, are longitudinal oriented in a first station and angularly oriented in a second station using a reference notch cut in one ferrule edge. Successive ferrules are picked from the second station and placed in a die of a punch press. Ferrule exterior surface back-up is provided by the die upon closure, and interior surface back-up is provided by a mandrel inserted in the ferrule bore as the punches converge into stop-forming engagement with the ferrule wall. Formed ferrule discharge is induced by placement of the next ferrule in the die.