发明名称 |
Manufacture of rotary drill bits |
摘要 |
There is provided a method of manufacturing a rotary drill bit of the kind including a plurality of cutting structures mounted in sockets in the bit body and projecting from the face of the bit. The method comprises providing a clearance between each cutting structure and its socket and filling the clearance with a settable liquid, the settable liquid being such as to solidify at a temperature less than 400 DEG C. and to retain its integrity, after solidification, at least up to a temperature of 180 DEG C. The solidified liquid acts as a gap filler and provides an interference fit between the cutting structure and the socket. Suitable gap filing settable liquids are: anaerobic adhesive, epoxy resin, dental amalgam, tin/lead solder and bismuth/antimony alloy.
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申请公布号 |
US4873895(A) |
申请公布日期 |
1989.10.17 |
申请号 |
US19880265237 |
申请日期 |
1988.10.31 |
申请人 |
REED TOOL COMPANY LIMITED |
发明人 |
TAYLOR, MALCOLM R.;BARR, JOHN D.;SMART, JOHN R. |
分类号 |
B23K31/02;B23P11/00;E21B10/56;E21B10/567;E21B10/62;F16B11/00 |
主分类号 |
B23K31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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