摘要:
The invention provides a mining machine (10) and a method of mining. The mining machine (10) includes a body (12), an arm (14) mounted on the body (12) for angular displacement relative to the body (12), a mining head (16) mounted on an end region (14,1 ) of the arm (14) for rotation relative to the end region (14,1 ) of the arm (14), drive means (18) for driving the mining head (16) to rotate relative to the end region (14,1 ) of the arm (14) while the mining head (16) is in abutment with a mining face, and drive means (18) for driving the arm (14) to displace angularly relative to the body (12), such that, in use, the arm (14) can be driven to displace angularly relative to the body (12) to sweep the mining head (16) across a mining face while the mining head (16) is driven to rotate and in abutment with the mining face, thereby to mine the mining face.
摘要:
Die vorliegende Erfindung betrifft einen Schneidkopf für eine Vortriebs- oder Gewinnungsmaschine sowie ein Verfahren zur Herstellung des Schneidkopfes. Der erfindungsgemäße Schneidkopf weist zunächst einen Schneidkopfkern (07) und mehrere Meißelhalter (08) auf. Erfindungsgemäß bestehen der Schneidkopfkern (07) und zumindest mehrere der Meißelhalter (08) aus einem einzigen Gusswerkstück (02). Das erfindungsgemäße Verfahren zur Herstellung eines Schneidkopfes umfasst zunächst einen Schritt zur Bereitstellung einer Gussform (01) zum Gießen eines Schneidkopfkerns (07) mit mehreren Meißelhaltern (08). In einem nächsten Schritt wird die Gussform (01) mit einem Gusswerkstoff ausgegossen. Anschließend kommt es zu einem Erstarren des Gusswerkstoffes, sodass ein festes Gusswerkstück (02) ausgebildet wird. Dieses Gusswerkstück (02) bildet den Schneidkopfkern (07) mit den Meißelhaltern (08) aus. Der Schneidkopfkern (07) und die gegossenen Meißelhalter (08) sind somit durch ein einziges Gusswerkstück (02) gebildet. Schließlich erfolgt ein Entformen des Gusswerkstückes (02), bei welchem die Gussform (01) vom Gusswerkstück (02) entfernt wird.
摘要:
A method of forming at least one crack (11) in a concrete article such as a concrete slab (10) having at least one crack promoting groove (28) formed in the surface (25) thereof and/or at least one crack promoting insert (12) cast within the concrete slab (10) and substantially aligned with the groove (28) where used, the method comprising the steps of positioning a tool (24) having a force applying member (26) on or above the surface (25) of the concrete slab (10) such that the member (26) is positioned adjacent to or above a groove (28) and/or insert (12) and causing the tool (24) to apply through the member (26) a force to the concrete slab (10) to promote the formation of a crack or cracks (11) in the slab (10) along a groove (28) and/or insert (12). Apparatus for forming a crack in a concrete article is also disclosed.
摘要:
A rock excavating or cutting device (10) including a disc cutter (12) that is driven by drive means (20) to rotate in an oscillating and nutating manner by driving the disc cutter (12) about separate oscillating and nutating axes AA, BB which are angularly offset from one another and which intersect at a point ahead of the disc cutter (12).
摘要:
A rock cutting machine including a boom (11) rotatably mounted at a proximal end to a chassis (13) adapted to be placed adjacent a rock face (14) to be cut. The boom extends from the chassis to a distal end adjacent the rock face. A longitudinal boom axis (21) extends between the proximal and the distal ends of the boom and a cutting device (10) is pivotally mounted about a pivot axis (20) adjacent the distal end of the boom. The pivot axis enables wrist movement about the pivot axis by a drive mechanism (29) and is offset from the longitudinal axis of the cutting device (23).
摘要:
The aim of the invention is to sink sections, especially in underground coal mining. To this end, a the cutting device (17) of a sinking machine (1) consists of two swing rollers (19, 20) which are arranged vertically and pivotally and which are linked to the machine frame (10) via supporting arms (21). The machine frame (10) also serves as a skewback. Said swing rollers (19, 20) are height-adjustable. The convergence-related elevations (7) are cut from the gallery end (6) in the direction of the centre of the section and are simultaneously delivered onto the conveyor (8) by means of the swing rollers (19, 20) that operate in different directions. In a preferred and advantageous embodiment, the dimensions of the sinking machine (1) are small in comparison with the cutting forces and the requisite restoring forces of the cutting device (17).
摘要:
The aim of the invention is to sink sections, especially in underground coal mining. To this end, a the cutting device (17) of a sinking machine (1) consists of two swing rollers (19, 20) which are arranged vertically and pivotally and which are linked to the machine frame (10) via supporting arms (21). The machine frame (10) also serves as a skewback. Said swing rollers (19, 20) are height-adjustable. The convergence-related elevations (7) are cut from the gallery end (6) in the direction of the centre of the section and are simultaneously delivered onto the conveyor (8) by means of the swing rollers (19, 20) that operate in different directions. In a preferred and advantageous embodiment, the dimensions of the sinking machine (1) are small in comparison with the cutting forces and the requisite restoring forces of the cutting device (17).
摘要:
The invention relates to a cutting machine (2), comprising cutting or shearing tools (19) which are mounted in such a way that they can rotate, a loading ramp and a conveyor (4) for receiving and removing the cut or shorn material, said conveyor running in the direction of the working face. According to the invention, the cutting or shearing tools (19) are mounted on a carriage which moves on guides extending in the longitudinal direction of the machine. Said guides are formed by pipes or bars which are connected to an engine frame in the area of the tracklaying gear (1), preferably within the frame of the tracklaying gear (1). The carriage is formed by longitudinal spars (10) and a crossbeam (9) for mounting the cutting or shearing tools (19). The machine frame has a box shape (3) at least in the front area adjacent to the crossbeam (9) and the conveyor is guided in the inner width of this box shape in such a way that it can move in the longitudinal direction of the machine.
摘要:
The invention relates to a device for damping vibrations in part-face cutting machines (1), comprising an extension arm (3) pivoting round two axes (5, 9) with cutting tools (7) rotationally fitted thereon. Said device has a hydraulic regulating drive mechanism (6) which is impinged upon by fluid via a valve arrangement. Sensors (13 or 14) are provided in order to detect vibrations, accelerations, load and/or position of the cutting arm (3) and which trigger a corresponding compensation of the regulating drive mechanism formed by the hydraulic cylinder piston units (6) by means of a control device (16). The position of the extension arm (3) is thus kept basically constant round the vertical rotational axis (9) when the swing gear swivels.
摘要:
The invention relates to mining and can be used for extracting ore from strata with complex deposition structures. The object of the invention is to make the selective method of working seams more widely applicable and more efficient, and to enhance the technical potentiall of the machine in bulk and selective methods of mineral extraction. The face-working machine comprises a housing with a feed mechanism, two actuating elements in the form of arms, each provided with a built-in drive and two screw conveyors. Each arm is connected to the housing by a bracket at one end of which the arm is attached so as to articulate, while the other is fitted in guide elements so as to be capable of moving. Hydraulic cylinders cause the brackets to move with the arms against the face by an amount equivalent to the intake capacity of the screw conveyor.