Mining core drill bit and method of making thereof
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United States of America Patent
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Jul 3, 2012
Grant Date -
N/A
app pub date -
Jan 4, 2010
filing date -
Jan 5, 2009
priority date (Note) -
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Abstract
A core drill bit includes an elongate hollow cylindrical body having opposite first and second ends with an end section having an end face defining an annular non-planar surface. The cutting head includes a plurality of circumferentially spaced apart cutting segments, the cutting segments being electrical welded to the non-planar surface whereby raised portions of the surface melt during the welding to affix the cutting segments with the face of the tool body.
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