Method of processing inner surface of bearing

Details Method of processing inner surface of bearing Method of processing inner surface of bearing

2005-05-10

2005-05-10

Chen, Bret (Department: 1762)

Coating processes

Interior of hollow article coating

Metal base

C427S355000, C427S384000

Reexamination Certificate

active

06890594

ABSTRACT:
The invention provides a method of processing an inner surface of a bearing having a cylindrical shape which bearing includes a resin layer composed mainly of a synthetic resin as the inner surface, the method improving roughness of the inner surface and dimensional accuracy of an inner diameter of the bearing without cutting the inner surface. According to the method, the bearing is press-fitted into a jig and then the jig is mounted on a chuck. Next, a mandrel having a cylindrical bar shape is inserted into an inner diameter portion of the bearing and then the mandrel is heated by a heater up to 250° C., for example. The mandrel is expanded due to thermal expansion by the heating so that the inner surface, i.e., a surface of the resin layer is pressed by a press face of a peripheral surface of the mandrel.

REFERENCES:
patent: 3574429 (1971-04-01), Reising
patent: 3705450 (1972-12-01), Morisaki
patent: 3958595 (1976-05-01), Al et al.
patent: 4000982 (1977-01-01), Ueda
patent: 4575429 (1986-03-01), Jacobson
patent: 988258 (1965-04-01), None
patent: 2 174 460 (1986-11-01), None
patent: 2001-311429 (2001-11-01), None
patent: 2001-311429 (2001-11-01), None
Definition of “jig” from Merriam-Webster's Collegiate Dicitonary, 10th Edition, 201 1999 by Merriam-Webster, Inc., p. 629.

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