Abstract: A gyratory crusher includes a crushing head on which a first crushing shell is mounted, and a frame on which a second crushing shell is mounted. The crusher has a thrust bearing which is made up of horizontal bearing plates and which is located between a vertical shaft and a piston arranged vertically below the vertical shaft. The crusher further has a first space, which is adapted to receive a variable amount of pressurized liquid, the first space being defined by the piston and a piston housing formed in the frame, and a second space which is adapted to receive, by way of a duct, pressurized liquid from the first space, the second space being located between the vertical shaft and the piston and at least partly accommodated in an opening in at least one of the bearing plates. The first space and the second space are adapted, by the liquid, to transmit forces from the crushing head to the piston housing, in order that the load on the thrust bearing is relieved.

Abstract: A shim plate for milling tools for chip removing machining, including an upperside, an underside, and at least one side surface extending between the upperside and the underside and forming an angle?90° with the upperside. A through hole includes a first section mouthing in the upperside, and a second section mouthing in the underside and having a diameter that is smaller than a diameter of the first section. The upperside at least partially transforms into the side surface via an edge portion configured to be an active auxiliary chip-removing cutting edge upon failure of a cooperating cutting insert. The edge portion includes a chamfer surface that forms an obtuse angle (?) with the upperside.

Abstract: A method of making a coated body including a coating and a substrate where, onto said substrate, a coating is deposited, using a PVD deposition process. The coating includes a nitride, carbide, oxide, boride or mixtures thereof, of one or more elements selected from groups IVb, Vb, VIb of the periodic table and Al, Y and Si. The deposition process includes at least one sequence of varying the substrate bias voltage, while maintaining the active targets. The sequence of varying the substrate bias voltage includes a subsequence Si including depositing at a first substrate bias voltage, Bi, for a deposition time, Ti, of between 10 seconds and 60 minutes, then, during a ramping time, Ri, of between 10 seconds and 40 minutes, while depositing, gradually changing the substrate bias voltage to a second substrate bias voltage Bi+1, where |Bi?Bi+1|?10 V. The subsequence, Si, is repeated until i=n where i=0, 1, 2, . . .

Abstract: A vertical shaft impact crusher includes a rotor for accelerating a first flow of material to be crushed, a first feed element for feeding the first flow of material to the rotor, a housing including a circumferential impact wall section against which the accelerated first flow of material may be crushed, and a second feed element for feeding a second flow of material towards a distributing wall section of the housing and further into the path of the accelerated first flow of material. A cavity ring separates the impact wall section from the distributing wall section. The cavity ring includes at least two ring segments. Supports are provided for supporting the ring segments. A locking device is provided for pressing the ring segments towards at least one of the supports.

Abstract: Material removal tool (310) with a translating bar (360) having an actuation surface (362) shaped as a cone or frustum, wherein an axial position of the cone or frustum along a length of the translating bar (360) corresponds to a position of a push rod (364) in operable contact with flexibly mounted cartridges (312) on which cutting inserts (316) are mounted is disclosed. The translating bar (360) is actuated between a first and second position to place different combinations of cutting inserts (316) from different cutting positions (a-d) in a radially outermost position. Various combinations of cutting positions (a-d) and cutting inserts (316) are disclosed along with various methods for removing material using the disclosed material removal tool (310).

Abstract: In a hydraulic system for mining equipment and a method of adjusting the power of a rock drill machine, at least one mining actuator used for detaching rock is connected to a dedicated separate hydraulic circuit having a special hydraulic pump. The power of the mining actuator is adjusted by changing the hydraulic power generated by the separate hydraulic circuit of the hydraulic pump.

Abstract: A self drilling rock bolt incorporating a shaft and an anchoring device. A first end of the bolt has a drill tip to penetrate rock and a second end is adapted to be connected to a drilling apparatus to allow rotation of, and thrust to, the bolt. A circulation passage is provided to allow fluid to be passed to the drill tip and in one form a central passage is formed in the shaft to form part of this circulation passage. The anchoring device is operative to retain the bolt when located in a drilled hole and comprises a mandrel having one or more inclined external surface mounted to, or integrally formed with, the shaft and at least one expansion element overlaying the mandrel. The expansion element(s) is displaced radially outwardly on a predetermined relative movement between the mandrel and the element.

Abstract: A short-hole drill, including a drill body being rotatable about a center axis and having a rotationally symmetrical envelope surface, one or more replaceable cutting inserts mounted in pockets in a front end of the drill body, one or more outwardly open flutes being countersunk in the envelope surface and extending rearwardly from the front end of the drill body to evacuate chips from the cutting inserts, and a number of replaceable first support pads being mounted in countersunk seats proximate the front end of the drill body to support and guide the drill against a hole wall generated by the cutting inserts. A number of second support pads are mounted in countersunk seats that are axially spaced apart from the first support pads by an envelope surface portion having a predetermined axial extension to support and guide the drill when the first support pads leave the hole wall.

Abstract: A method and a system for monitoring the location of a mining vehicle in a mine. The mine includes a first and a second work area. At least one identifier whose exact location is known is arranged in the first work area. The location of the mining vehicle is determined continuously by use of a dead reckoning. The location data, based on the dead reckoning, can be updated by use of the identifier. The location data are transmitted to a mine control system for monitoring the mining vehicle.

Abstract: The present invention discloses coated cutting tool inserts particularly useful for turning of nodular cast iron preferably at high speeds, comprising a cemented carbide substrate comprising from about 5 to about 9 wt-% Co and from about 1 to about 5 wt % cubic carbides and balance WC of 86-94 wt-%, and a coating comprising a first layer of TiCxNyOz with equiaxed grains, a layer of TiCxNyOz with a thickness of less than about 10 to about 15 ?m with columnar grains, a layer of TiCxNyOz with a thickness of from about 0.1 to about 2 ?m and with equiaxed or plate-like grains, a layer of ?-Al2O3 with thickness from about 3 to about 8 ?m, an outer layer of a multilayered structure of TiN+TiC with TiC being the outermost layer and a total thickness of from about 0.5 to about 2 ?m and wherein the outer coating layer has been removed in the edge line and on the rake face so that the ?-Al2O3 layer is on top along the cutting edge line and on the rake face and the outer TiC layer is the top layer on the flank face.

Abstract: The invention relates to a method of measuring a stress wave and to a measuring device and a rock breaking device. A percussion device (7) gives impact pulses to a waveguide (21), where a compression stress wave and a reflected tensile stress wave are generated, which propagate in the waveguide. The compression stress wave causes an extension in the waveguide and the tensile stress wave a thinning, in which case properties of the waveguide may be determined by measuring geometric changes in the cross section of the waveguide. The measurement data are utilized in controlling the rock breaking device.

Abstract: A rotating device for rotating an apparatus arranged at the outer end of a boom, which boom has a longitudinal axis, the rotating device comprising a first torque motor unit arranged to rotate the apparatus substantially around an axis in the direction of the longitudinal axis of the boom, and a second torque motor unit arranged to rotate the apparatus around an axis that is at an angular position relative to the longitudinal axis of the boom, whereby the first and the second torque motor unit are arranged side by side relative to each other when seen in the direction of the longitudinal axis of the boom. The torque motor units are arranged in a body part common to both torque motor units.

Abstract: The present invention relates to a stainless steel alloy, more specifically a duplex stainless steel alloy with a ferritic-austenitic matrix and high corrosion resistance in combination with good structure stability, specifically a duplex stainless steel with a ferrite content of 40-65% and a well balanced analysis and with a combination of high corrosion resistance and good mechanical properties, such as high ultimate strength and good ductility which is especially suitable for use in applications in oil and gas explorations such as wire, especially as reinforced wire in wireline applications. These purposes are achieved according to the invention by a duplex stainless steel alloy that contains (in wt %): C 0-0.03%; Si up to max 0.5%; Mn 0-3.0%; Cr 24.0-30.0%; Ni 4.9-10.0%; Mo 3.0-5.0%; N 0.28-0.5%; S up to max. 0.010%; Co 0-3.5%; W 0-3.0%; Cu 0-2%; Ru 0-0.3%; Al 0-0.03; Ca 0-0.010%; the balance being Fe and unavoidable impurities.

Abstract: The invention relates to a method for breaking rock to be drilled in rock drilling, in which method the rock to be drilled is subjected to successive stress pulses via a tool. The method comprises stress pulses being exerted on the rock at a high frequency, and the load proportion calculated on the basis of the values of the frequency and the length (tp) of the stress wave being at least 0.075.

Abstract: In a supporting device (2) for an advance working or mining machine (1), including support props (3) and at least one roof bar (4), the roof bar(s) (4), on their sides facing away from the support props (3), include(s) a plurality of support cylinders (5) with support stops, which can be separately braced against the roof.

Abstract: A crusher system, including a first crushing surface and a second crushing surface which are operative to crush material between them. A hydraulic system is operative to adjust a gap between the first crushing surface and the second crushing surface by adjusting a position of the first crushing surface with a hydraulic cylinder connected to the first crushing surface. The hydraulic system includes an accumulator connected to the hydraulic cylinder by a hydraulic liquid conduit. The accumulator includes a hydraulic liquid chamber and a gas chamber separated from the hydraulic liquid chamber. The accumulator has a preloading pressure that is the pressure of the gas chamber when the hydraulic liquid chamber is empty, which is at least 0.3 MPa lower than a mean operating pressure of the hydraulic cylinder, such that the accumulator is active and variations occurring in the hydraulic pressure of the hydraulic cylinder during operation of the crusher system are attenuated.

Abstract: Connector assembly adapted to connect riser member of riser device to another riser member for connecting an oil well to an oil rig includes a male part having a male axial portion and a female part having a female axial portion opposite to said male axial radial portion, which together form a seat. A sealing ring having a radially extending annular stem provided with first and second axial seal support portions, and a radial annular portion interconnecting said first and second seal support surfaces being axially separated. Said radially extending annular stem has a first axial seal support portion adapted at atmospheric pressure to abut said male axial portion and a second axial seal support portion adapted during use to abut said female axial portion.

Abstract: A pressure-fluid-operated percussion device includes a frame allowing a tool to be arranged movably in its longitudinal direction. Pressure liquid is fed to the percussion device and returned to a pressure liquid tank. A stress pulse is produced in the tool utilizing pressure of the pressure liquid. A pressure liquid source maintains pressure in the working pressure chamber. Pressure liquid is intermittently fed to the percussion device such that the pressure liquid pushes a transmission piston into a predetermined backward position. Pressure liquid is alternately discharged rapidly from the percussion device so that the pressure of the pressure liquid in the working pressure chamber and the pressure liquid flowing from the pressure liquid source pushes the transmission piston towards the tool, generating a stress pulse in the tool.