Damped products and methods of making and using the same
View Patent ↗Various embodiments of the invention include products and parts including a frictional damping means and methods of making and using the same.
1. A product comprising:
a body portion comprising cast metal portion and a frictional damping means to damp vibration of the body portion cast-in-place by the cast metal portion comprising at least a first frictional surface, a first frictional surface comprising a surface of the body portion, a surface of an insert, a surface of a layer comprising particles or fibers on the insert, and wherein the insert is not pre-loaded, and wherein the insert is enclosed by the cast metal portion the body portion or the cast metal portion extends into or through the insert or a portion of the insert is bonded to the cast metal portion.
2. A product as set forth in claim 1 wherein the first frictional surface is defined in the body portion.
3. A product as set forth in claim 2 further comprising a second frictional surface defined by the body portion.
4. A product as set forth in claim 1 wherein the first frictional surface is a surface of the insert.
5. A product as set forth in claim 1 wherein the first frictional surface is a surface of the layer.
6. A product as set forth in claim 5 wherein the first frictional surface is a surface of the layer, and wherein the layer comprising the plurality of particles.
7. A product as set forth in claim 6 wherein the layer further comprises a binder.
8. A product as set forth in claim 1 wherein the product comprises an electric motor drive housing.
9. A product as set forth in claim 1 wherein the product comprises a transmission housing.
10. A product as set forth in claim 1 wherein the product comprises a rear end housing for a vehicle drive system.
11. A product as set forth in claim 1 wherein the product comprises an engine block.
12. A product as set forth in claim 1 wherein the product comprises a differential case.
13. A product as set forth in claim 1 wherein the product comprises a combustion engine exhaust manifold.
14. A product as set forth in claim 1 wherein the product comprises a combustion engine cylinder head.
15. A product as set forth in claim 1 wherein the product comprises the head of a golf club.
16. A product as set forth in claim 1 wherein the product comprises a baseball bat.
17. A product as set forth in claim 1 wherein the product comprises an archery bow.
18. A product as set forth in claim 1 wherein the product comprises a device used in a sport.
19. A product as set forth in claim 1 wherein the product comprises a machine.
20. A product as set forth in claim 4 wherein the insert has a minimum average thickness of 0.5 mm and a minimum width of 0.5 mm.
21. A product as set forth in claim 4 wherein the insert has a thickness ranging from about 0.5-3.5 mm.
22. A product as set forth in claim 3 wherein each of the first frictional surface and the second frictional surface comprises a plurality of peaks and valleys and wherein the valleys have an average depth ranging from about 1 mm to about 300 mm.
23. A product as set forth in claim 1 wherein the particles or fibers have a bonding property such that the particles or fibers may bind to each other under compression.
24. A product as set forth in claim 6 further comprising a coating on the particles or fibers.
25. A product as set forth in claim 6 wherein the particles or fibers are treated to provide functional groups thereon.
26. A product as set forth in claim 1 further comprising a plurality of particles or fibers embedded in the body portion.
27. A product as set forth in claim 4 further comprising a plurality of particles or fibers embedded in the insert.
28. A product as set forth in claim 6 wherein each particle or fiber having a length along the longest dimension thereof ranging from about 1 μm-300 μm.
29. A product as set forth in claim 6 further comprising a organic binder.
30. A product as set forth in claim 6 further comprising a polymeric binder comprising at least one of epoxy resins, phosphoric acid binding agent, calcium aluminates, sodium silicates, wood flour or clay.
31. A product as set forth in claim 6 further comprising an inorganic binder.
32. A product as set forth in claim 1 wherein the product comprises a vehicle brake rotor.
33. A product as set forth in claim 1 wherein the product comprises a shaft.
34. A product as set forth in claim 1 wherein the product comprises a bearing.
35. A product as set forth in claim 5 wherein the layer includes at least one of aluminum or silica particles and a binder.
36. A product as set forth in claim 35 wherein the binder comprises lignosulfanate.
37. A product as set forth in claim 4 wherein the insert includes at least one tab having a wettable surface and the body portion being bonded thereto.
38. A product as set forth in claim 4 wherein the insert comprises at least one of aluminum, steel, stainless steel, cast iron or a metal matrix composite.
39. A product as set forth in claim 3 wherein a slot feature is provided between the first frictional surface and the second frictional surface.
40. A product as set forth in claim 5 wherein the layer has a thickness ranging from about 1 μm-300 μm.
41. A product as set forth in claim 6 wherein the particles or fibers do not become eroded at a temperature of 2400° F. or less.
42. A product as set forth in claim 6 wherein the particles or fibers do not become eroded at a temperature of 2700° F. or less.
43. A product as set forth in claim 6 wherein the particles and fibers provide a plurality of peaks for making contact with one of the body portion or the insert.
44. A product as set forth in claim 4 wherein the insert is not preloaded, under pre-tension or held in place by tension.
45. A product as set forth in claim 4 wherein the insert is not a spring.
46. A product as set forth in claim 4 wherein the insert is completely enclosed by the body portion.
47. A product as set forth in claim 4 wherein the insert is constructed and arranged as an inlay in the body portion.
48. A product as set forth in claim 4 wherein the insert is over an outer surface of the body portion.
49. A product as set forth in claim 4 wherein the insert includes a first face and an opposite second face, and wherein the body portion includes a first inner face adjacent the first face of the insert constructed and arranged to be complementary thereto.
50. A product as set forth in claim 49 wherein the first face of the insert and the first face of the body portion are parallel to each other.
51. A product as set forth in claim 4 wherein the insert includes a tab including a bent portion and wherein the bent portion of the tab includes at least one wettable surface and wherein the body portion is bonded to the wettable surface.
52. A product as set forth in claim 4 wherein the insert includes a tab including a bent tab portion.
53. A product as set forth in claim 4 wherein the insert includes at least one throughhole and wherein the body portion includes a post extending through the throughhole.
54. A product as set forth in claim 4 wherein the insert has a recess formed therein and wherein the body portion comprises a post extending onto the recess.
55. A product as set forth in claim 53 wherein the post is bonded to the insert.
56. A product as set forth in claim 1 wherein the body portion comprises cast iron and the insert comprises stainless steel.
57. A product as set forth in claim 1 wherein the frictional surface provides an area over which frictional contact may occur during frictional damping of the part, the area extending in a first direction a minimum distance of 0.1 mm and extending in a second direction a minimum distance of 0.1 mm.
58. A product as set forth in claim 1 wherein the insert comprises a shoulder constructed and arranged to engage the body portion to hold the insert in place.
59. A product comprising:
a body portion comprising a cast metal portion and frictional damping means comprising an insert and wherein the insert is at least partially held in place by a portion of the cast metal portion extending into the insert, through the insert or over a shoulder of the insert, and wherein the insert and the body portion have surfaces for frictional movement with respect to each other to damp vibrations of the body portion.
60. A product as set forth in claim 59 wherein the insert comprises a shoulder constructed and arranged to engage the body portion to hold the insert in place.