Plain bearing with overlay
AssigneeGlacier Vandervell, Inc.
InventorKenneth M McMeekin
Life of this patent
Estimating the term…
Abstract
A method of making a multi-layer plain bearing comprises roll-bonding a relatively soft aluminum-tin alloy to a harder aluminum-based bearing substrate and then roll-bonding the composite to a steel backing. Following heat treatment conventional for reticulation of the aluminum-tin alloy the surface is machined to give a precise overall bearing thickness of which the aluminum-tin overlay is in the range of 0.01-0.10 mm, typical of an overlay but having greater fatigue strength and war resistance than conventional electro-deposited materials. Alternatively, the overlay substrate and backing strips may be roll-bonded simultaneously.
Claims31
A method of manufacturing a multilayer plain bearing having an overlay, the bearing comprising a hard backing layer, a bearing alloy substrate layer bonded to the hard backing layer and an overlay layer bonded to the bearing alloy substrate layer, said overlay layer being soft relative to the bearing alloy substrate layer, the method comprising the steps of:
- (a) providing separate strips of said backing layer, bearing alloy substrate and overlay layers, said overlay layer comprising an aluminum-tin alloy having from 15 to 50 wt % of tin therein;
- (b) pressure bonding said bearing alloy substrate layer and overlay layer together to form a first composite material;
- (c) heat treating said first composite material at a temperature such as cause annealing and stress relieving of said first composite material;
- (d) pressure bonding said heat treated first composite material to said hard backing layer such that the bearing alloy substrate layer is adjacent the backing layer to form a second composite material;
- (e) heat treating said second composite material at a temperature such as to cause reticulation of said aluminum-tin alloy overlay layer;
- and
- (f) machining the surface of said overlay layer in said second composite material to achieve a desired thickness of said overlay layer in said plan bearing.
A method of manufacturing a multilayer plain bearing having an overlay, the bearing comprising a hard backing layer, a substrate bearing alloy layer bonded to the hard backing layer and an overlay layer bonded to the substrate bearing alloy layer, said overlay layer being soft relative to the substrate bearing alloy layer, the method comprising the steps of:
- providing separate strips of said backing layer, said substrate bearing alloy and said overlay layers;
- said overlay layer comprising an aluminum-tin alloy having from 15 to 50 wt % of tin therein;
- simultaneously pressure bonding said hard backing material strip layer, said substrate bearing alloy strip layer and said overlay strip layer together to form a composite material;
- heat treating said composite material at a temperature such as to cause reticulation of said aluminum-tin alloy overlay layer;
- and machining the surface of said overlay layer in said composite material to achieve a desired thickness of said overlay layer.
A method of manufacturing a multilayer plain bearing having an overlay, the bearing comprising a hard backing layer, a substrate bearing alloy layer bonded to the bearing alloy hard backing layer and an overlay layer bonded to the substrate bearing alloy layer, said overlay layer being soft relative to the substrate bearing alloy layer, the method comprising the steps of:
- providing a first composite strip comprising a layer of a relatively hard backing material having a layer of a substrate bearing alloy material bonded thereto, said substrate bearing alloy material layer comprising a copper-based alloy;
- providing an overlay strip layer;
- said overlay strip layer comprising an aluminum-tin alloy having from 15 to 50 wt % of tin therein;
- pressure bonding said first composite strip and overlay strip layers together to form a second composite material;
- heat treating said second composite material at a temperature such as to cause reticulation of said aluminum-tin alloy overlay layer;
- and machining the surface of said overlay layer in said second composite material to achieve a desired thickness of said overlay layer.
Dependencies are inferred from the claim text.