BIT CONFIGURATION FOR A CUTTER HEAD

摘要

A cutter head for a mining machine includes a drum defining a drum axis with a drum plane extending perpendicular to the drum axis. The cutter head includes a plurality of cutting bit assemblies secured to an outer surface of the drum proximate a first end. Each cutting bit assembly includes a block and a bit. The bit includes a tip configured to engage a mine surface. The bit defines a bit axis, and the bit axis defines a first lean angle relative to the drum plane. The plurality of cutting bit assemblies includes a first series having four first bits, a second series having two second bits, a third series having two third bits, and a fourth series having two fourth bits. Each of the first bits includes a first tip and defines a first bit axis oriented at a first lean angle relative to the drum plane. The first lean angle is between about 60 degrees and about 75 degrees.

主权项

1. A cutter head for a mining machine, the cutter head comprising:
a drum including a first end and a second end and defining a drum axis extending between the first end and the second end, the drum rotatable about the drum axis, a drum plane extending perpendicular to the drum axis; a plurality of cutting bit assemblies secured to an outer surface of the drum proximate the first end of the drum, each cutting bit assembly including a block and a bit, the block having a bore, the bit positioned at least partially in the bore of the block and including a tip configured to engage a mine surface, the bit defining a bit axis, the bit axis defining a first lean angle relative to the drum plane; wherein the plurality of cutting bit assemblies includes a first series having four first bits, each of the first bits including a first tip and defining a first bit axis oriented at a first lean angle relative to the drum plane, the first lean angle between about 60 degrees and about 75 degrees.