Daido Metal Company Ltd.

Takeshi Shindo

Hideki Iwata

Kotaro Kashiyama

Takahiro Niwa

Takuya Tanaka

Weixing Zhong

An object of the present invention is to provide a sliding member which can slide for a longer period of time even in a dry state. In the present invention, sliding layersare provided on the surfaces of a base material, and the sliding layercontains polybenzimidazole (PBI) and 1 to 70 vol % of a solid lubricant. Since PBI, which is a thermoplastic resin, has higher heat resistance and also has higher material strength than PAI, PI, and EP, which are the conventionally used thermosetting resins, the wear resistance and the anti-seizure property can be improved and a decrease in material strength caused by high-temperature atmosphere, heat generation at the time of sliding, etc. can be restrained. Furthermore, the initial conformability can be improved because of high elongation percentage. Also, since the sliding layer contains the solid lubricant, the coefficient of friction can be decreased, and hence the anti-seizure property can be enhanced.

Sliding member

There is provided a double-sided sliding thrust bearing of a plate shape adapted to be in sliding contact with a counterpart on each of both faces of the thrust bearing, comprising a bearing structure provided with a plate-shaped base member having an anchor effect on each of both faces thereof, and a sliding layer having a thickness not less than 30 &#x3bc;m on each of the faces of said base member which sliding layer is made of a thermosetting resin-containing material. By making the thickness of the sliding layernot less than 30 &#x3bc;m, it becomes possible for the thrust bearingto slide shoes for a longer time even when being used in a dry state and the sliding layercomes to be hardly peeled off from the base memberbecause of the anchor effect of the base member. Further, the mechanical strength and thermal conductivity of the thrust bearingcan be improved by the base memberlocated between the sliding layers

Double-sided sliding thrust bearing

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&#xb0; 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.

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Inuyama, Japan

Takeshi Shindo