| 摘要 |
FIELD: mining.SUBSTANCE: invention concerns rock destruction tool, namely, to disc bits. Drill disk bit includes housing with flushing channel and journal to support rotary disc with cutters, and unit for their sharpening, including rotary centraliser and spring-loaded holder with abrasive, installed with possibility of interaction with cutters of disc. Drill bit body is made with additional flushing channel, one end of which is interconnected with main flushing channel, and other one is directed to zone of contact between abrasive and cutters of disc.EFFECT: technical result provides higher efficiency of drill bit operation.2 cl, 2 dwg |
