Process and apparatus for fabricating stepped nails

Details Process and apparatus for fabricating stepped nails Process and apparatus for fabricating stepped nails

1988-06-21

1989-11-21

Combs, E. Michael

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

10 53, 10 54, B21H 306, B21H 330

Patent

active

048813958

ABSTRACT:
A process and die unit for fabricating stepped nails wherein a top portion of a blank is pressed into a rough slender tip portion at the first step of the process, and a shank portion of the blank is pressed in the second step of process so as to have threads on the peripheral surface thereof, and the rough slender tip portion is simultaneously pressed for correction so as to refine into a finished slender tip portion.

REFERENCES:
patent: 1913143 (1933-06-01), Robertson
patent: 4147088 (1979-04-01), Whittaker
patent: 4722107 (1988-02-01), Kariya

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