Diamond insert grinding process

Details Diamond insert grinding process Diamond insert grinding process

1989-12-18

1991-02-19

Britts, Ramon S.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

51217R, 175411, 228125, 407118, E21B 1046

Patent

active

049935054

ABSTRACT:
This invention comprises a diamond insert grinding process to remove stress riser cracks formed in a critical area of a tungsten carbide insert body. The cracks are caused by leaching of cobalt from the carbide during the process of brazing a tungsten carbide backed polycrystalline diamond disc to the body. A grinding wheel selectively removes material from the intersection of the braze below the depth of the cracks in the tungsten carbide body thereby relieving the stress riser in the critical area of the body.

REFERENCES:
patent: 4727945 (1988-03-01), Dennis
patent: 4813187 (1989-03-01), Mushardt

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