Aluminium-radical three-layer composite self-lubricating bearing and manufacturing method thereof

Abstract

The invention relates to an aluminium matrix three-layer composite self-lubricating bearing, whose base body is aluminium alloy. A layer of spherical bronze powder without lead, whose thickness is 0.10-0.15mm is combined on the working surface of base. Anti-friction and wear resistance plastic layer, whose thickness is 0.02-0.07mm and which comprises PTFE, molybdenum disulfide, and carbon fiber so on. The invention discloses components of anti-friction and wear resistance plastic layer without lead and the manufacturing method. Compared with prior international DU bearing, it is not only provided with merits of DU bearing, which is good wear resistance, little friction coefficient, low noise, good running performance and self lubricating so on; but also better lightweight, better wear resistance and no lead poison. It is especially applied in the occasion with high demand of lightweight, for example aerospace engineering; meanwhile in following industries such as food and drink mechanism, pharmaceutical machine, household appliance, fitness appliance and office equipments so on, in which DU bearing can not be used and health environmental protection is demanded.

Description

Technical field [0001] The present invention belongs to the subclass of bearings in the International Patent Classification Table, that is, F16C, and particularly relates to the preparation method of aluminum-based three-layer composite self-lubricating bearing materials and the bearings manufactured therefrom. Background technique [0002] As early as the middle of the 20th century, the British GLACIER company invented a three-layer composite material with steel plate as the substrate, sintered spherical bronze powder in the middle, and sintered and rolled anti-friction and wear-resistant plastic on the surface, and then rolled into a sleeve shape. Self-lubricating bearings, usually called DU bearings. The bearing has the characteristics of good wear resistance, small friction coefficient, low noise, good running-in performance and self-lubrication. Later, three-layer composite bearings with stainless steel base and copper base were derived. However, the above bearings ha...

AI Technical Summary

Problems solved by technology

In addition, although lead-free spherical bronze powder is already available in the market, it is not easy to make the anti-friction and wear-resistant plastic layer lead-free, because the anti-friction and wear resistance performance will decrease due to lead-free without lead. The proportion and preparation method of anti-friction and wear-resistant materials have become the key technology

In addition, the melting point of the aluminum alloy plate is 660 ° C, while the melting point of the bronze powder is as high as 900 ° C, so the process of sintering the bronze powder and the aluminum alloy substrate cannot be implemented at all.

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