Method of manufacturing bottomed hollow cylinder using a press

Details Method of manufacturing bottomed hollow cylinder using a press Method of manufacturing bottomed hollow cylinder using a press

1997-03-03

1999-07-20

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Electrical device making

72348, G11B 5127

Patent

active

059241888

ABSTRACT:
A manufacturing method is provided for forming a hollow cylinder with a bottom which may be employed in rotary head drums of magnetic recording and reproduction systems such as video tape recorders and digital audio tape recorders.
The manufacturing method includes pressing a single circular plate to form the hollow cylinder, thrusting an end of a side wall of the hollow cylinder in a direction substantially parallel to the side wall in a press die so as to adjust the thickness of the side wall to be uniform, and machining an outer surface of the side wall of the hollow cylinder so as to have a given surface roughness and a given roundness.

REFERENCES:
patent: 5379626 (1995-01-01), Hara et al.
patent: 5394727 (1995-03-01), Diekhoff et al.

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