Abrading – Rigid tool
Patent
1996-08-27
1998-01-27
Rose, Robert A.
Abrading
Rigid tool
451541, 451542, 175428, 175432, B24B 3300
Patent
active
057117020
ABSTRACT:
A cutting compact has a superhard abrasive layer bonded to a substrate layer, wherein the configuration of the interface between abrasive and substrate layers is a non-planar, or three dimensional, interface which increases the surface area between the layers available for bonding and optimizes the structural integrity of the compact according to its desired application. In one embodiment, the topography between the substrate and abrasive layers of the compact is characterized by interlocking concentric circular grooves and channels of varying width, depth and shape. In another embodiment, the interface between the grooves and channels is rounded and smooth. In additional embodiments, the grooves and channels are positioned on substantially angled interfaces or substantially curved interfaces. Additional configurations of the present invention provide that the grooves alternatingly start and stop along the path in interfacing with their respective channels. Yet additional configurations disclosed include variations in the width of the groove/channel along the diameter of the abrasive layer and the substrate layer. The present invention thus provides an increased mechanical interlock between the abrasive layer and the substrate layer. The increased surface area between the substrate and abrasive layers promotes the sintered bond between the layers, thereby improving resistance to spalling or delamination of the abrasive layer from the substrate layer. Another advantage is that the number, depths and widths of the channels can be adjusted to meet the desired performance characteristics of the compact and to strengthen points of particular stress according to specific applications of the compact.
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Nguyen George
Rose Robert A.
Tempo Technology Corporation
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