Method of fabricating a sintered oilless bearing

Details Method of fabricating a sintered oilless bearing Method of fabricating a sintered oilless bearing

1997-11-24

1999-08-31

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

With reshaping or surface embossing of formed article

264120, 264628, 419 2, 419 27, 419 38, F16C 3310, F16C 3314, B22F 324

Patent

active

059450509

ABSTRACT:
A method for fabricating a sintered oilless bearing using a correcting rod having a projection correcting portion and a groove forming portion having outer diameters respectively identical to inner diameters of projections and grooves to be formed into the oilless bearing. An upper punch is inserted into the upper portion of the correcting rod for pressing the sintered oilless bearing to allow the inner periphery of the sintered oilless bearing to closely contact the groove forming portion and, simultaneously, fit into the projection forming portion. A lower punch is ascended from the lower portion of the correcting rod for separating the sintered oilless bearing from the correcting rod and to allow a portion of the inner periphery of the sintered oilless bearing inserted into the projection forming portion to match with the outer periphery of the projection correcting portion while being compressed, thereby exactly matching the concentricities of the projections and grooves of the sintered oilless bearing to make the kinetic pressure generating force consistent and improve a bearing force.

REFERENCES:
patent: 4059879 (1977-11-01), Chmura et al.
patent: 4534922 (1985-08-01), Atkinson et al.
patent: 4774749 (1988-10-01), Furumura
patent: 5030396 (1991-07-01), Saita et al.
patent: 5043123 (1991-08-01), Gormanns et al.
patent: 5045262 (1991-09-01), Munk
patent: 5167885 (1992-12-01), Rice et al.
patent: 5785429 (1998-07-01), Jeong

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