SURFACE CONFIGURATIONS FOR DAMPING INSERTS
One embodiment of a product includes an insert for disposition in or on a component. The insert may have at least one contact surface that can experience relative frictional movement against an adjacent interior surface of the component. The at least one contact surface of the insert may comprise a nominal plane and surface features arranged in a nonstochastic pattern. The insert may also be constructed and arranged for disposition in or on the component to dampen sound when the component is vibrated.
1 . A product comprising:
an insert for disposition in or on a component, the insert having at least one contact surface that can experience relative frictional movement against an adjacent interior surface of the component, the at least one contact surface of the insert comprising a nominal plane and surface features arranged in a nonstochastic pattern, the insert being constructed and arranged in or on the component to dampen sound when the component is vibrated.
2 . The product of claim 1 , wherein the nonstochastic pattern comprises a diamond pattern in which the surface features are equidistantly spaced apart from their immediately surrounding surface features at center-to-center distances that range from about 75 μm to about 4500 μm.
3 . The product of claim 1 , wherein the contacting surface of the insert has a concentration of surface features that ranges from about 5.8×10 4 surface features/m 2 to about 2.1×10 8 surface features/m 2 .
4 . The product of claim 1 , wherein the surface features are rounded.
5 . The product of claim 4 , wherein the surface features are hemispherical in shape and raised above nominal plane for contact with the adjacent interior surface of the component.
6 . The product of claim 5 , wherein the surface features comprise a radius of about 25 μm to about 1500 μm.
7 . The product of claim 4 , wherein the surface features are hemispherical in shape and depressed below the nominal plane so that the nominal plane contacts the adjacent interior surface of the component.
8 . The product of claim 7 , wherein the surface features comprise a radius of about 25 μm to about 1500 μm.
9 . The product of claim 1 , wherein the surface features are sharp-edged.
10 . The product of claim 9 , wherein the surface features are four-sided pyramids with the sides meeting at an apex.
11 . The product of claim 1 , wherein the component comprises a brake rotor and the insert is shaped for circumferential disposition in the rotor cheek so that the entire contacting surface of the insert comprises the nonstochastic pattern of surface features.
12 . A brake rotor assembly comprising:
a brake caliper that carries one or more brake pads;
a brake rotor that includes a rotor hat secured to a vehicle wheel and a rotor cheek positioned annularly around the rotor hat, the rotor cheek having an interior surface and an exterior braking surface near the one or more brake pads such that the brake pads can be selectively engaged against the exterior braking surface; and
an insert disposed in or on the rotor cheek and comprising at least one contact surface that experiences relative frictional movement with the interior surface of the rotor cheek, the at least one contact surface comprising a nominal plane and surface features arranged in a nonstochastic pattern such that the surface features are spaced apart at center-to-center distances that range from about 75 μm to about 4500 μm.
13 . The product of claim 12 , wherein the nonstochastic pattern comprises a diamond pattern in which the surface features are equidistantly spaced apart from their immediately surrounding surface features.
14 . The product of claim 13 , wherein the surface features are hemispherical in shape and raised above the nominal plane of the contacting surface, the surface features having a radius about 25 μm to about 1500 μm.
15 . The product of claim 13 , wherein the surface features are hemispherical in shape and depressed below the nominal plane of the contacting surface, the surface features having a radius of about 25 μm to about 1500 μm.
16 . The product of claim 13 , wherein the surface features are shaped as four-sided pyramids in which the sides meet at an apex.
17 . The product of claim 13 , wherein the insert is annularly shaped so that the contact surface is in continuous contact with the interior surface of the rotor cheek along the entire circumference of the rotor cheek.
18 . The product of claim 13 , wherein the contacting surface of the insert has a concentration of surface features that ranges from about 5.8×10 4 surface features/m 2 to about 2.1×10 8 surface features/m 2 .
19 . A method comprising:
providing a substrate blank;
forming surface features arranged in a nonstochastic pattern on at least one surface of the substrate blank using a precision surface forming technique capable of forming the surface features so that the features meet predetermined shape and spacing parameters;
incorporating the substrate blank into a component such that the at least one surface of the substrate blank with the nonstochastic pattern of surface features formed thereon can experience relative frictional movement with a surface of the component to dampen the component.
20 . A method as set forth in claim 19 , wherein forming the surface features comprises forming, on the at least one contacting surface, a nonstochastic pattern that comprises a diamond pattern in which the surface features are equidistantly spaced apart from their surrounding surface features at center-to-center distances that range from about 75 μm to about 4500 μm.
21 . A method as set forth in claim 19 , wherein forming the surface features comprises forming surface features that are hemispherical in shape and raised above a nominal plane of the at least one contacting surface of the substrate blank.
22 . A method as set forth in claim 19 , wherein forming the surface features comprises forming surface features that are hemispherical in shape and depressed below a nominal plane of the at least one contacting surface of the substrate blank.
23 . A method as set forth in claim 19 , wherein forming the surface features comprises forming surface features that are four-sided and pyramidal in shape and raised above a nominal plane of the at least one contacting surface of the substrate blank.