公开(公告)号：US3593557A

公开(公告)日：1971-07-20

申请号：US3593557D

申请日：1969-02-05

Applicant: WINKHAUS FA AUGUST

Inventor： UEKOTTER ANTON ,  GREISNER PAUL

IPC: B21K13/02 ,  E05F1/06 ,  B21C23/00

CPC classification number: E05F1/063 ,  B21K13/02 ,  Y10T29/24

Abstract: The tubular barrels of a rising hinge having a loose pin are shaped in a tubular die in which an obliquely inclined annular face of an internal shoulder divides the die bore into two portions of different uniform cross section, by inserting a metal blank into the wider bore portion and partly extruding the metal through the orifice in the annular face into the second, narrower bore portion. The wider portion of the intermediate metal body so obtained which duplicates the shape of the annular face, is drilled out to a cross section greater than that of the narrower bore portion so that the narrower metal portion is severed from the now-tubular wider portion of the metallic body.