Cutter head for mining machine
AssigneeJoy Global Underground Mining LLC
InventorsRussell P. Smith, Andrew D. Hunter, Peter A. Lugg, Ian B. Schirmer, Geoffrey W. Keech, Christopher Coates, Bradley M. Neilson
Life of this patent
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Abstract
A cutter head includes a first member, a cutting bit, and a second member. The first member includes a first end and a second end and includes a first mass. The cutting bit is coupled to the first member proximate the second end. The cutting bit includes a cutting edge rotatable about the axis. The second member is rotatable about the axis and includes a second mass eccentrically positioned with respect to the axis. Rotation of the second mass causes the first member and the cutting bit to oscillate.
Claims30
A method for controlling a mining machine, the method comprising:
- sensing a value of an indicator of a cutting efficiency of a cutter head;
- comparing the sensed value of the indicator with a desired value of the indicator;
- modifying an operating parameter in a first direction from an initial value to a second value, including modifying an operating parameter of an eccentric mass supported on the cutter head, movement of the eccentric mass inducing oscillation of the cutter head;
- detecting the change relative to the sensed value of the indicator of cutting efficiency;
- and
- when the change in the indicator of the cutting efficiency represents an improvement, modifying the operating parameter further in the first direction to a third value.
A method for controlling a mining machine, the method comprising:
- sensing a first value of an indicator of a cutting efficiency of a first cutter;
- sensing a second value of an indicator of cutting efficiency of a second cutter;
- comparing the first value with the second value to detect whether the first value is less than the second value;
- when the first value is less than the second value, modifying an operating parameter of the second cutter so that the second value matches the first value.
A method for controlling a mining machine, the method comprising:
- sensing a value of an indicator of a cutting efficiency of a cutter head;
- comparing the sensed value of the indicator with a desired value of the indicator;
- modifying an operating parameter in a first direction from an initial value to a second value;
- detecting the change relative to the sensed value of the indicator of cutting efficiency;
- and
- when the change in the indicator of the cutting efficiency represents an improvement, modifying the operating parameter further in the first direction to a third value,
- wherein the sensed value includes an angular position of a cutting bit against a rock wall and the angular direction of the momentum of an inertial mass relative to the angular position of the cutting bit, and wherein modifying the operating parameter includes modifying an oscillation of the inertial mass to change the direction of the momentum of the inertial mass when the cutting bit engages the rock wall.
A method for controlling a mining machine, the method comprising:
- sensing a value of an indicator of a cutting efficiency of a cutter head;
- comparing the sensed value of the indicator with a desired value of the indicator;
- modifying an operating parameter in a first direction from an initial value to a second value;
- detecting the change relative to the sensed value of the indicator of cutting efficiency;
- and
- when the change in the indicator of the cutting efficiency represents an improvement, modifying the operating parameter further in the first direction to a third value,
- wherein the indicator is a cutting energy transferred from the cutter head to a rock wall.
Dependencies are inferred from the claim text.