Wear resistant tools
First Claim
1. A machining tool comprising an elongated tool body having a top machining surface, side machining surfaces, and a bottom surface, said top machining surface and a portion of said side machining surfaces depending downwardly therefrom formed with machining faces and wherein at least said top machining surface and a portion of said downwardly depending surfaces adjacent thereto are coated with a layer of PCD or PCBN of substantially uniform axial thickness prior to said machining faces being formed therein.
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0 Petitions
Accused Products
Abstract
Wear resistant rotary machining tools including twist drill bits, slot drill bits, thread taps, end mills and reamers are disclosed. The tools comprise a body of cemented tantalum, titanium tungsten carbide (1) having a layer of abrasive polycrystalline diamond or cubic boron nitride compact (2) bonded to a convex curved surface of the tool body. The twist drill bits of the invention comprise a layer of abrasive compact of substantially uniform axial thickness extending over substantially the whole top surface of the tip of the drill bit. Methods of manufacturing the wear resistant tools are also disclosed.
76 Citations
12 Claims
- 1. A machining tool comprising an elongated tool body having a top machining surface, side machining surfaces, and a bottom surface, said top machining surface and a portion of said side machining surfaces depending downwardly therefrom formed with machining faces and wherein at least said top machining surface and a portion of said downwardly depending surfaces adjacent thereto are coated with a layer of PCD or PCBN of substantially uniform axial thickness prior to said machining faces being formed therein.
Specification