Abstract: A cutter head for excavating hard rock materials in rock face includes a carrier attachable to a cutter arm of a cutter machine and a drive shaft rotatably supported by the carrier. The drive shaft is rotatable about a drive axis and has at one end a support portion for mounting disc cutters. A plurality of disc cutters are mounted on the support portion and configured to perform undercutting against the rock face. Each disc cutter is rotatable about a respective support axis, the respective rotational axis of each disc cutter being configured to be substantially transverse to the rotational axis of the cutter head. A mining machine including the cutter head is also disclosed.

Abstract: A cutter head for excavating hard rock materials in rock face includes a carrier attachable to a cutter arm of a cutter machine and a drive shaft rotatably supported by the carrier. The drive shaft is rotatable about a drive axis and has at one end a support portion for mounting disc cutters. A plurality of disc cutters are mounted on the support portion and configured to perform undercutting against the rock face. Each disc cutter is rotatable about a respective support axis, the respective rotational axis of each disc cutter being configured to be substantially transverse to the rotational axis of the cutter head. A mining machine including the cutter head is also disclosed.

Abstract: A roller cutter unit is mountable at a cutting head of undercutting mining machines. The cutter unit includes an elongate mount shaft to position and support a cutter ring. The cutter ring is secured to the mount shaft via a bracket having a wedge segment configured to be wedged axially and radially between the cutter ring and the shaft. Accordingly, a mounting mechanism is provided to achieve a desired force transmission pathway from the cutter ring into the shaft so as to maximize the locking action of the cutter ring at the cutter unit.

Abstract: A roller cutter unit is mountable at a cutting head of undercutting mining machines. The cutter unit includes an elongate mount shaft to position and support a cutter ring. The cutter ring is secured to the mount shaft via a bracket having a wedge segment configured to be wedged axially and radially between the cutter ring and the shaft. Accordingly, a mounting mechanism is provided to achieve a desired force transmission pathway from the cutter ring into the shaft so as to maximize the locking action of the cutter ring at the cutter unit.

Abstract: A cutting apparatus suitable for creating tunnels and subterranean roadways includes independently pivoting supports that each carry a respective, independently pivoting arm and a rotatable cutting head. Each cutting head, via the supports and arms, is configured to slew laterally outward in a sideways direction and to pivot in a vertical upward and downward direction. The supports and arms are mounted on a linear moving sled carried by a main frame.

Abstract: A cutting apparatus suitable for creating tunnels and subterranean roadways includes independently pivoting supports that each carry a respective, independently pivoting arm and a rotatable cutting head. Each cutting head, via the supports and arms, is configured to slew laterally outward in a sideways direction and to pivot in a vertical upward and downward direction. The supports and arms are mounted on a linear moving sled carried by a main frame.

Abstract: In a method for controlling the drive of a shearing or heading machine for cutting a round, as a function of manipulated variables such as the movement speed of the cantilever arm, the position of the cutting tools and/or the power consumption of the drive motors and the pressure in hydraulic actuating cylinders, a minimum and a maximum target value are determined for the movement speed of the cantilever arm, and at least two factors each having values of between 0 and 1 are calculated for the manipulated variables as a function of measurement values, the measurement values at least comprising cutting tool position data compared to set data corresponding with a set profile, motor load measurement data and cantilever arm movement speed measurement data, and the movement speed of the cantilever arm is controlled as a function of the product of the set speed and the respectively calculated factors.

Abstract: In a device for producing a gas-liquid mixture and, in particular, air-water mixture in the region of cutting tools, particularly chisels, arranged on at least one cutter head (10) rotationally mounted on a cutter arm (5) of a cutting machine (1), including at least one nozzle pair comprised of a nozzle (14) for ejecting a gas jet and a nozzle (13) for ejecting a liquid jet, wherein the axes (17, 18) of the nozzles (13, 14) of a nozzle pair are oriented in a manner that the jets impinge on each other at a distance from the outlet openings of the nozzles, the axes (17, 18) of the nozzles (13, 14) of a nozzle pair form an angle with each other of between 45 and 135°, preferably between 75 and 85°.

Abstract: In a device for producing a gas-liquid mixture and, in particular, air-water mixture in the region of cutting tools, particularly chisels, arranged on at least one cutter head (10) rotationally mounted on a cutter arm (5) of a cutting machine (1), including at least one nozzle pair comprised of a nozzle (14) for ejecting a gas jet and a nozzle (13) for ejecting a liquid jet, wherein the axes (17, 18) of the nozzles (13, 14) of a nozzle pair are oriented in a manner that the jets impinge on each other at a distance from the outlet openings of the nozzles, the axes (17, 18) of the nozzles (13, 14) of a nozzle pair form an angle with each other of between 45 and 135°, preferably between 75 and 85°.