Hydraulic assist stripping

Details Hydraulic assist stripping Hydraulic assist stripping

1981-06-29

1983-02-15

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

With stripping or ejecting from tool

72345, 72349, 72427, B71D 4500

Patent

active

043733689

ABSTRACT:
A method and apparatus for forming a cylindrical wall-ironed sleeve having a bottom and a radially inwardly enlarged wall thickness at an end remote from said bottom with there being an internally tapered transition region between a normal wall thickness and the enlarged wall thickness, said method including the forming of the sleeve on a mandrel with said enlarged wall thickness being interlocked with said mandrel; the step of introducing a fluid under pressure through the mandrel between the mandrel and the sleeve at the transition region of the sleeve to momentarily radially enlarge the end of the sleeve remote from the bottom and release the inter-lock between the sleeve and the mandrel.

REFERENCES:
patent: 2983366 (1961-05-01), Pevret
patent: 3402591 (1968-09-01), Maeder
patent: 3524338 (1970-08-01), Bozel
patent: 3537291 (1970-11-01), Hawkins
patent: 3771344 (1973-11-01), Wright
patent: 3911718 (1975-10-01), Requarth
patent: 3972217 (1976-08-01), Misonoo

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