Process and apparatus for forming a circular lip around an openi

Details Process and apparatus for forming a circular lip around an openi Process and apparatus for forming a circular lip around an openi

1991-03-06

1992-07-14

Larson, Lowell A.

Metal deforming

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

With cutting of work or product

72117, 72123, B21D 1904

Patent

active

051292491

ABSTRACT:
After machining, the floor of a countersink is chased by means of rollers driven to execute an orbital motion, the angle which the attack surface of the rollers forms with the axis of the opening being progressively reduced as a function of the advance of the roller carrier. Application to the forming of connecting lips around the openings of a nuclear reactor vessel barrel.

REFERENCES:
patent: 18452 (1857-10-01), Howell
patent: 157810 (1874-12-01), Garstang
patent: 743644 (1903-11-01), Johnson
patent: 1011000 (1911-12-01), Worth et al.
patent: 1753963 (1930-04-01), Mauser
patent: 3151657 (1964-10-01), Beranek
patent: 4246772 (1981-01-01), Moshnin et al.
SU 1479158 Al Kova-67-87, May, 1989.

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