Method of and apparatus for coining tapers at opposite ends of a

Details Method of and apparatus for coining tapers at opposite ends of a Method of and apparatus for coining tapers at opposite ends of a

1991-07-28

1993-01-12

Jones, David

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72360, B21J 1300

Patent

active

051779919

ABSTRACT:
A method of and apparatus for coining tapers at opposite end faces of a sleeve member in which upper and lower punches are displaced relative to upper and lower dies, respectively, before start of a coining operation, to engage the opposite end faces of the sleeve member. Thereafter, the upper die is advanced together with the upper punch to effect coining. The sleeve member is supported at both its opposite end faces during the entire coining operation.

REFERENCES:
patent: 659522 (1900-10-01), Furbish
patent: 2480011 (1949-08-01), Freter
patent: 2827007 (1958-03-01), Wurzburger
patent: 4918967 (1990-04-01), Ishinaga

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