Abstract:
A cutter head for a mining machine includes a first end and a second end with a drum axis extending between the first and the second ends. The cutter head also includes a web coupled to the second end of the drum. The web includes a plurality of arcuate apertures. Each arcuate aperture extends through an angle about the drum axis. The cutter head further includes a plurality of first ribs coupled to the web. Each of the first ribs is positioned between adjacent arcuate apertures. The cutter head also includes a plurality of second ribs coupled to the web. Each of the second ribs extend across one of the plurality of arcuate apertures. A first angle that extends between one of the first ribs and an adjacent one of the second ribs is different than a second angle extending between the one first rib and another adjacent second rib.
Abstract:
The invention relates to a method and a device for machining materials by milling and/or drilling, in particular for removing rock, concrete, minerals or coal, having a tool drum (10) in which a plurality of tool shafts (9) which bear machining tools (7) at their ends projecting from the tool drum (10) are mounted such that they can be driven in rotation. A drive element (12) for the tool shafts and the tool drum (13) can be rotated relative to each other, and the drum carrier can be moved relative to the material by using a movement device (6, 7). By means of a control device, the speed of the relative movement between tool carrier (2) and material and the rotational speed of the tool drum (10) can be varied. In order to avoid critical operating points, the device is assigned at least one measuring sensor (30) for measuring the natural translational vibration and/or at least one measuring sensor (32; 34) for determining the rotational vibrations of the tool drum (10), and the control device has at least one vibration analysis module, by means of which, in a vibration analysis, a vibration spectrum can be determined, and at least one controller module, by means of which drive parameters can be or are controlled as a function of the vibrations determined by the analysis module.
Abstract:
The edge cutter bit assembly (40) includes a plurality of holders (42). Each holder (42) has a bore (50) for holding a non-rotatable cutter bit (70). The holders (42) are oriented with respect to the drum (22) so that at least a portion of each one of the cutter bits (70) extends past the edge of the drum (22).
Abstract:
The pick (1) includes a radially inner end (4) and a shank (3) to be fixed to the drum (10) to substantially prevent relative movement between the pick (1) and drum (10). The pick (1) further includes a cutting head (2) having leading (5) and trailing faces (6) intersecting to provide a cutting edge (8) to extend generally parallel to an axis. The leading face (5) in use is inclined by an acute rake angle R to a radius of the axis, with the trailing face 6 being inclined at an acute back clearance angle B to a plane passing through the edge (8) and normal to the radius. The leading face (5) and trailing face (6) being inclined by an acute angle and the shanks when fixed to the drum (10) extends at an acute angle to the radius.
Abstract:
The present disclosure relates to a method for quarrying rock. The method includes a first phase in which at least two spaced-apart relief slots are provided in a layer of rock such that a rock piece is defined between the relief slots. The method also includes a second phase in which the rock piece is fractured from between the relief slots. The disclosure also relates to a multiple rock wheel device for concurrently cutting a plurality of slots into a rock formation.
Abstract:
A block (20) and non-rotating wear sleeve (30) for holding a cutting tool used for mining and construction is disclosed. A key (64) is used to intersect with notches (40, 72) in the wear sleeve and block at a rear face of the wear sleeve (30) and block (20) to prevent rotational movement between the wear sleeve (30) and block (20). Locating the key (64) and notches (40, 72) at the rear face (54) provides an easily manufactured anti-rotation means which is also sheltered from the most of the abrasion experienced by the block (20) and wear sleeve (30).
Abstract:
A block (20) and non-rotating wear sleeve (30) for holding a cutting tool used for mining and construction is disclosed. A key (64) is used to intersect with notches (40, 72) in the wear sleeve and block at a rear face of the wear sleeve (30) and block (20) to prevent rotational movement between the wear sleeve (30) and block (20). Locating the key (64) and notches (40, 72) at the rear face (54) provides an easily manufactured anti-rotation means which is also sheltered from the most of the abrasion experienced by the block (20) and wear sleeve (30).