Method for manufacturing self-aligning bearing

Abstract

Abstract PURPOSE:To obtain a proper bearing gap between inner and outer races, by disposing a thermo plastic sysnthetic resin inner race having a convex spherical part in its outer peripheral surface, in a die cavity in which the inner race is heated to be expanded, then by charging a thermo plastic synthetic resin containing a reinforcing filler into the die cavity, with which the outer race is formed, and by finally cooling the inner and outer races. CONSTITUTION:A drag die 10 and a cope die 20 are coupled together to form a cavity 30. A shaft 50 fitted thereonto with and holding an inner race 60 having a convex spherical surface part in the outer peripheral surface thereof, is disposed in the die cavity 30, and the dies are heated in this condition to expand the inner race 60 by a predetermined amount. Then a molten thermo plastic synthetic resin containg a reinforcing filler is charged into the cavity 30 through a filling port 40 to form an outer race 70, and then is cooled. A bearing gap S is formed between the inner and outer races due to the difference between their contraction amounts. If an oil containing polyacetal resin is used for the inner race to form a lubrication film on the slide surface of the inner race, it is effective to to reduce friction. The amount of glass-fiber filler used in the outer race is preferable to be about 30%.

Inventors

• 👤 Seiichi Nozato
• 👤 野里　誠一
• 👤 Takeshi Hasegawa
• 👤 猛 長谷川
• 👤 Kikuo Sumiyoshi
• 👤 住吉　喜九夫

Bibliographic Details