Diamond mining core drill bit and methods of making thereof
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United States of America Patent
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Jun 27, 2017
Grant Date -
May 22, 2014
app pub date -
Oct 3, 2013
filing date -
Nov 21, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A core drill bit includes an elongate hollow cylindrical body having opposite first and second end sections, a plurality of cutting segments with a connecting portion joined to the second end section, a plurality of reinforcing members joined to the second end section between the cutting segments and contacting adjacent cutting segments to offer rotational support thereto, and a plurality of current concentrators disposed on one or both of the second end section and the connecting portion. The cutting segments being capacitive discharge welded to the second end section whereby the surface of the second end section melts during the welding to affix the cutting segments with the tool body. The cutting segments include diamonds dispersed therein with portions having varying diamond concentrations.
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