Abstract: A percussive rock drill bit includes a head having an annular gauge collar and a central island. An annular cutting channel is defined between the collar and the island such that specifically positioned cutting buttons are effective to create an annular ridge in the cut rock face having a reduced rock breaking resistance.

Abstract: A gyratory crusher topshell and topshell assembly including an outer crushing shell and optional intermediate spacer ring. The topshell has a radially inward facing surface that is divided into a plurality of regions including an upper and lower mount region axially separated by an intermediate annular rib. The rib enables the topshell to be compatible with a variety of different sized and shaped concaves optionally using an intermediate spacer ring without the need for a backing compound.

Abstract: A gyratory crusher includes an eccentric having an inner slide bearing surface and an outer slide bearing surface, the inner slide bearing surface defining, together with an opposing slide bearing surface, an inner slide bearing. The outer slide bearing surface defines, together with another opposing slide bearing surface, an outer slide bearing. The eccentric is rotatably connected to a crusher frame so as to allow a rotation about an eccentric axis of rotation, which is fixed relative to the frame. The eccentric axis of rotation is defined by one of the inner and outer slide bearings. The inner slide bearing has a total height-to-diameter quotient (H1/D1) of less than 1.0.

Abstract: A method of making a cutting tool includes providing a first sintered cemented carbide body of a WC, a metallic binder phase and eta phase and wherein the substoichiometric carbon content in the cemented carbide is between ?0.30 to ?0.16 wt %. The first sintered cemented carbide body is subjected to a heat treatment at a temperature of between 500 to 830° C. for a time between 1 to 24 h. A cutting tool made according to the above method having an increased resistance against comb cracks is also provided.

Abstract: An austenitic alloy comprising (in weight %): C: 0.01-0.05 Si: 0.05-0.80 Mn: 1.5-2 Cr: 26-34.5 Ni: 30-35 Mo: 3-4 Cu: 0.5-1.5 N: 0.05-0.15 V: ?0.15 the balance being Fe and unavoidable impurities, characterized in that 40?% Ni+100*% N?50.

Abstract: A gyratory crusher hydraulic pressure relief valve includes a hydraulic fluid vestibule arranged to be fluidly connected to a hydraulic fluid space. A logic element is arranged to dump hydraulic fluid from the hydraulic fluid space, which includes a plunger having a first plunger surface and a second plunger surface, and a control pipe arranged for fluidly connecting the second plunger surface to the hydraulic fluid vestibule. A supply orifice restricts the flow of hydraulic fluid from the vestibule towards the second plunger surface to make the time TC it takes for the logic element to switch from open position to closed position exceed the time TF it takes for a closed side setting position of the crusher to make one full round.

Abstract: A conveyor furnace includes a muffle having an inlet opening and an outlet opening, with a heating device for heating a volume delimited by the muffle, and a closed conveyor belt manufactured at least partially from metal. The conveyor furnace includes another heating device which is arranged so that, during the operation of the conveyor furnace, the heating device heats a section of the conveyor belt extending outside of the muffle.

Abstract: A signal transmission system or a sensor system comprises at least one signal line and at least one sensor connected to the signal line, a first tube formed of a metal strip or metal plate having two longitudinal edges extending in a longitudinal direction and two transverse edges connecting the longitudinal edges, wherein the metal strip or metal plate is formed to a cavity by joining the longitudinal edges of the metal strip or metal plate together, and wherein the at least one signal line is located in the cavity. A method for manufacturing such a signal transmission system or a sensor system is also disclosed.

Abstract: The present invention is concerned with twist drills for drilling of composite materials such as carbon fibre reinforced plastic (CFRP) and glass fibre reinforced plastic (GFRP). The present invention proposes that a twist drill (2) is provided with a variable helix having a defined start and finish helix angle, in combination with primary and secondary relief angles such that the drill (2) is adapted to minimise thrust force, particularly when used for drilling fibre-containing composite materials and especially for hand drilling. Start and finish helix angles of 50° and 10°; 50° and 30°; and 30° and 10° have been shown to provide excellent cutting performance and exit hole quality. A large secondary chisel edge angle (24) has also been found to contribute to excellent performance with composite materials, including stack machining.

Abstract: A process line tool of a cemented carbide comprising in wt %; about 2.9-11 Ni; about 0.1-2.5 Cr3 C2; and about 0.1-1 Mo; and a balance of WC, with an average WC grain size less than or equal to 0.5 ?m.

Abstract: System for reduction of dimensional end-taper in abrasive blasted tubes has a pressurized chamber maintaining higher air pressure inside the chamber than atmospheric pressure, an air-exit port allowing gases to exit the chamber at a controlled rate, a valve restricting passage of gases from the air-exit port, a pressurized membrane through which the tube passes creating a seal, a gauge port where pressure inside the pressurized chamber is monitored and a media-exit port allowing evacuation of abrasive blast media particles after being expelled from the exit-end of the tube. The system addresses dimensional end-taper as high back pressure at the exit end of the tube reduces velocity of the gases and abrasive particles carried in it, thereby reducing erosion of the inner walls of the tube near its exit end. The system can be employed with a wide range of tube sizes and in combination with several abrasive blasting techniques.

Abstract: The present disclosure relates to an object comprising a duplex stainless steel, in particular the object is suitable for use in spring applications. The duplex stainless steel has the following composition, in weight %:—C less than or equal to 0.040;—Si less than or equal to 0.60;—Mn 0.80-10.0;—Cr 21.0-28.0;—Ni 4.0-9.0;—Mo 0.9-4.5;—N 0.10-0.45;—Cu less than or equal to 0.50;—V less than or equal to 0.10;—P less than or equal to 0.010;—s less than or equal to 0.006; balance Fe and unavoidable impurities. The present disclosure also relates to a method of producing the object comprising said duplex stainless steel.

Abstract: A thermal process device for heat treating a product or plurality of products includes a thermal processing chamber having opposed distal ends and a plurality of controllable heating zones. At least one buffer zone is disposed at each of the distal ends. The buffer zones and heating zones of the thermal processing chamber form a heating element assembly. The heating assembly has an inner and outer surface and a secondary shell is disposed about the outer surface of the heating element assembly and spaced therefrom to form an inlet flow passage for a flow of a temperature adjusting medium along the heating element assembly.

Abstract: A handler for drill rods, a drill rod support thereof, a method of operation for the handler, and a drill rig employing the handler and the drill rod support is provided. The drill rod support includes a socket configured to receive a portion of a length of a drill rod, and a clamping device disposed within the socket and movable between clamping and release positions with respect to the drill rod.

Abstract: A connection tube (1) for connecting two tubes (8, 9) of different alloys, wherein the connection tube has a central through-hole extending along a longitudinal axis and comprises a first end portion (2) of a first alloy, 5 a second end portion (3) of a second alloy, and a middle portion (4) which is at least partly double-layered with said second alloy forming an annular inner layer and said first alloy forming an annular outer layer, wherein a metallic bond has been formed between said layers. The inner and outer layers are mechanically interlocked by means of at 10 least one helically extending thread formed in an interface between said layers. The connection tube is manufactured from a base component and an outer component threaded onto the base component to form a work piece, which is hot worked to form a metallic bond.

Abstract: A gyratory crusher spider wall shield for releasable mounting to a radially inward facing face of a spider positioned on top of a shell of a gyratory crusher includes a primary protection wall positionable over the inward face of the spider and a rear wall attachable to an outer annular fixating ring positionable axially intermediate a material input hopper and the spider.

Abstract: A measurement device for a chip removing machine, and methods of obtaining frequency response functions, obtaining stability charts and selecting operational parameters of a chip removing machining tool are disclosed. The device includes an engagement portion at the rear end for engagement with the machine and a measurement portion at the front end. The measurement portion is without a tool tip and includes a planar front end surface perpendicular to the centre axis. The front end surface has a coupling point aligned with the centre axis for receiving mechanical excitation. The front end surface further includes a plurality of seats for receiving one accelerometer each for measuring a response of the received mechanical excitation. When an accelerometer is received in one of the seats, and abutts against three contact surfaces thereof, it is positioned and oriented three dimensionally and around three axes of rotation in relation to the coupling point.

Abstract: A cutting unit for use with a cutting apparatus suitable for creating tunnels or subterranean roadways and the like, includes a cutting arm configured for pivotal movement around at least one pivot axis and a cutting head mounted to the cutting arm. The cutting head includes at least one rotatable cutting element for detaching material from a rock face, and a clearing arrangement mounted to the cutting arm. The clearing arrangement has a clearing blade for pushing detached rock material onto a loading table of the cutting apparatus, the clearing blade being guided by a first guiding mechanism to allow a free movement of the clearing blade in a first direction.

Abstract: A system for zone passage control for a zone of an autonomously operating mobile object includes at least a set of detection units to detect at least one mobile object entering and/or exiting the zone, a set of identification units arranged to identify the mobile object entering and/or exiting the zone, and a central controller being arranged in operational connection with the set of the detection units and with the set of the identification units. An admissibility level for a mobile object to enter the zone is determined and a control signal to stop at least one autonomously operating mobile object existing in the zone is provided in response to the determined admissibility level being negative for the mobile object entered the zone.

Abstract: The present application relates to an object comprising a pre-oxidized nickel based alloy comprising in percent by weight (wt-%) C 0.05-0.2; Si max 1.5; Mn max 0.5; Cr 15-20; Al 4-6; Fe 15-25; Co max 5; N 0.03-0.15; O max 0.5; one or more elements selected from the group consisting of Ta, Zr, Hf, Ti and Nb 0.25-2.2; one or more elements selected from the group consisting of REM max 0.5; balance Ni and normally occurring impurities an also to the use of said object wherein the use is in an environment comprised of high concentration of nitrogen, low partial pressure of oxygen and high temperature.