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 second crushing shell defines, together with the first crushing shell, a crushing gap. The gyratory crusher includes a space adapted to hold a liquid. The space is defined by a piston and a cylinder, any one of the piston and the cylinder being formed at least partly of a substantially vertical shaft around which the crushing head is arranged. The space is adapted to form, together with the liquid, a cushion, thereby enabling the cushion to serve as a thrust bearing and transmit vertical forces from the crushing head to the frame.

Abstract: A cutting pick comprising a cutting tip 10 formed such as from SiC-D and a metal pick body 11. The pick body 11 has a greater coefficient of thermal expansion than the cutting tip 10. The pick body 11 includes a generally cylindrical cavity 14 within which is received a generally cylindrical anchor portion 13. The tip 10 includes a coating 17 bonded to the outer surface of the anchor portion 13. An annulus 24 is left between the coating 17 and the cavity 14 within which is a solder or braze material which bonds to each of the coating 17 and the cavity 14. The pick body 11 employs the difference in thermal expansion to exert pressure on the anchor portion 13 to fix the tip 10 to the pick body 11.

Abstract: There is described a cutting tool with improved properties for metal machining having a substrate of cemented carbide and a hard and wear resistant coating on the surface of said substrate. The coating is deposited by Physical Vapor Deposition (PVD). The coating is composed of metal nitrides in combination with alumina (Al2O3). The coating is composed of a laminar multilayered structure. The insert is further treated to have different outer layers on the rake face, and flank face respectively.

Abstract: A cutting tool insert which can, for example, be used for machining of hardened steel, hot and cold working tool steel, die steel, case hardened steel, high speed steel and ductile grey cast iron and composed of a composite comprising a cBN-phase and a binder phase comprising a titaniumcarbonitride phase and a TiB2 phase is disclosed. In the XRD pattern from the composite using CuKa-radiation, the peak height ratio of the strongest (101) TiB2 peak and the strongest cBN (111) peak is less than about 0.06, the (220) from the titanium carbonitride phase in the XRD-pattern intersects both vertical lines of the PDF-lines of TiC (PDF 32-1383) and TiN (PDF 38-1420) and the lowest intersected point height is at least about 0.15 of the maximum (220) peak height of the ceramic binder phase. The insert is made by powder metallurgical methods milling, pressing and sintering, the sintering being performed at lowest possible temperature for shortest possible time necessary to obtain a dense structure.

Abstract: A tool for chip removing machining, including a basic body, and a cutting insert fixed in an insert seat in the basic body by a tightening element, and which, via at least one shoulder surface, is held pressed against a stop surface in the insert seat. An elastically deformable spring is arranged in the insert seat, which provides, by elastic deformation as a result of tightening of the tightening element, the pressing of the shoulder surface against the stop surface.

Abstract: The present invention provides a method of gel-casting WC—Co cemented carbide powder, where the resulting gelled body can be of complex shape and has a high green density, a good homogeneity and sufficiently good mechanical properties for the gelled body to be demolded and dried without significant shape-distortions and cracking. The method relates to the forming of a gelled body through the gelling of an aqueous slurry of WC—Co cemented carbide powder with good dispersion characteristics, where the gelling is achieved by the temperature induced polymerization reaction between a monomer and a cross-linker, catalyzed by a free-radical initiator. By further subjecting the body to drying, heating, and sintering, a dense cemented carbide body is obtained.

Abstract: A screening arrangement in a vibrating screen for screening of material, such as crushed stone, gravel or the like, the screening arrangement having one or more screening decks placed at different heights and provided with directing means, where the directing means are provided on the underside of at least one upper screening deck to direct the screened material upstream onto a screening deck located below the at least one upper screening deck.

Abstract: A CVD-coated cutting tool insert with a TiCxNy-layer with a low tensile stress level of 10-300 MPa and an ?-Al2O3-layer with a high surface smoothness of <0.1 ?m as measured by AFM-technique is disclosed. This is obtained by subjecting the coating to a first intensive wet blasting operation with a slurry of F80 grits of Al2O3 followed by a second wet blasting treatment with a slurry of F320 grits of Al2O3.

Abstract: A cutting pick comprising a cutting tip 10 formed such as from SiC-D and a metal pick body 11. The pick body 11 has a greater coefficient of thermal expansion than the cutting tip 10. The pick body 11 includes a generally cylindrical cavity 14 within which is received a generally cylindrical anchor portion 13. The tip 10 includes a coating 17 bonded to the outer surface of the anchor portion 13. An annulus 24 is left between the coating 17 and the cavity 14 within which is a solder or braze material which bonds to each of the coating 17 and the cavity 14. The pick body 11 employs the difference in thermal expansion to exert pressure on the anchor portion 13 to fix the tip 10 to the pick body 11.

Abstract: A turning tool including a basic body having an insert seat, an indexable turning insert having a triangular basic shape, and a tightening element fixing the turning insert in the insert seat. The insert includes an upperside and an underside between which three side surfaces extend that are situated in a first imaginary, equilateral triangle and therefore converge in pairs at an angle of 60° toward corners in which cutting edges are included. The turning insert is engaged with the insert seat via an interface that includes elongate and straight, female-like and male-like engagement members, which are in engagement with each other in order to prevent turning of the turning insert. The insert seat includes a supporting surface having a corner section against which an active corner of the turning insert is applied.

Abstract: A titanium based carbonitride alloy contains Ti, Nb, W, C, N and Co. The alloy also contains, in addition to Ti, Co with only impurity levels of Ni and Fe, 4-7 at % Nb, 3-8 at % W and has a C/(C+N) ratio of 0.50-0.75. The Co content is 9-<12 at % for general finishing applications and 12-16% for semifinishing applications. The amount of undissolved Ti(C,N) cores must be kept between 26 and 37 vol % of the hard constituents, the balance being one or more complex carbonitrides containing Ti, Nb and W. The invented alloy is particularly useful for semifinishing of steel and cast iron.

Abstract: The invention relates to a method for correcting positioning errors in rock drilling, and a rock drilling equipment. Deviation of the boom position from the theoretical position is measured as a function of the position of at least one boom joint, the measured deviations are stored in the memory of the drilling rig, and when the boom is positioned to the drilling position, its position is corrected on the basis of the stored deviation. The drilling equipment includes a memory for storing the deviations between the true position of the boom and the theoretical position calculated on the basis of the joint sensor values, and a calculating device for correcting the boom position on the basis of the deviations stored in the memory of the drilling rig.

Abstract: In a first aspect, the invention relates to a rock-drilling tool that comprises a drill rod (1;1??) having a male thread (5;5?), and a coupling sleeve (7:7?) having a female thread (15:15?) for the co-operation with the male thread of the drill rod. The male thread (5;5?) of the drill rod (1;1?) may consist of a martensitic, stainless steel. The coupling sleeve consists of hardened low-alloy steel. Axially inside the male thread (5;5?), a waist (32;32?) is formed in which the drill rod (1;1?) has the smallest diameter thereof. The male thread (5;5?) has a wear volume that is larger than the wear volume of the female thread (15; 15?). Furthermore, the invention relates to a drill rod per se as well as a coupling sleeve per se.

Abstract: An indexable milling insert, including an upperside, an underside parallel to an imaginary reference plane, and two cutting edges. Each cutting edge includes a cutting edge line and is formed between a chip surface included in the upperside and a first clearance surface extending between the upperside and the underside, the first clearance surface forming an acute, nominal first clearance angle (?) with a normal to the reference plane. Each cutting edge includes a main edge, which is at least partly convexly curved as viewed in plane elevation from above, and which extends from an initial end, which determines the maximal cutting depth of the milling insert, to a corner edge having a radius of curvature that is smaller than the radius of curvature of the main edge, the main edge rising in the direction from the initial end toward the corner edge such that the distance thereof to the underside successively increases in the direction.

Abstract: A cutting tool for parting and grooving operations of the kind including a coupling part, which is intended for mounting the cutting tool in a machine tool, and a tool head detachably connected to the coupling part. The tool head includes a basic holder part and, joined to the basic holder part, a blade part, in front portion of which an insert pocket is formed, in which a cutting insert is fastenable. The cutting tool also includes means for supplying cooling agent to the cutting insert. The cooling agent supplying means includes a tube member, which is mounted in a recess, which is transverse to the longitudinal direction of the blade part and arranged in the tool head. The tube member has an inlet for connection to a cooling agent source and an outlet for leading the cooling agent in a direction towards the cutting insert.

Abstract: The present invention relates to cemented carbide for steel tire cord drawing operations. The cemented carbide comprises WC with an ultra fine grain size and greater than 5 and less than 10 wt-% Co, including grain growth inhibitors (V and/or Cr) and with a specific relation between HV30 and cobalt content.

Abstract: A screening deck for the screening of crushed stone material includes a plurality of screening elements arranged adjacent one another. At least one side of each screening element is non-parallel with respect to a longitudinal direction of the screening deck. The screening deck includes at least two different types of screening elements which are arranged at different heights in the screening deck for creating narrowing passages and/or winding paths and/or steps for the material traveling on the screening deck.

Abstract: A tool and a cutting insert for chip removing machining, such as milling, turning or the like. The cutting insert includes a chip-removing main edge, which is separated from a center of the cutting insert and from which a clearance surface extends toward a transition to an underside in the form of a connecting surface, in which an elongate engagement means, e.g., a ridge, is included, which is situated nearer the transition than the center of the cutting insert, and includes a flank having the purpose of transferring cutting forces in the direction transverse to the length extension of the ridge. The ridge is the only active engagement means of an imaginary triangle between the center of the cutting insert and opposite ends of the transition, besides which the flank has a cross section-wise convex shape. In such a way, the active edge of the cutting insert is located in a desired exact position in relation to the tool, even if the cutting insert is impaired by minor form defects.

Abstract: A turning tool including a basic body having a pocket, a shim plate mounted in the pocket, and an indexable turning insert mounted in the pocket. The pocket opens in a front surface and in a side surface of the basic body, and accommodates two spaces spaced-apart level-wise, a lower space housing the shim plate and delimited by a bottom surface and two side support surfaces, which form an acute angle with each other, one of which is a primary side support surface and the other one a secondary side support surface, and an upper space housing the turning insert. The shim plate includes an upperside and an underside between which a pair of primary and secondary contact surfaces extend, which form an acute angle with each other and are urged against the primary and secondary side support surfaces in the pocket, as well as a pair of inactive surfaces extend in the form of an outer end surface and an outer side limiting surface, which together delimit a supporting corner section of the shim plate.