Abstract: A turning insert includes at least one cutting surface having at least one corner area. The corner area defines a nose angle in the range of 30-85°. The corner area includes a beveled edge. A bisector of the nose angle intersects the beveled edge at a center thereof at a right angle.

Abstract: A method for making a coated cutting tool insert by depositing by CVD, onto a cemented carbide, titanium based or ceramic substrate a hard layer system, having a total thickness of from about 2 to about 50 ?m, comprising at least one layer selected from titanium carbide, titanium nitride, titanium carbonitride, titanium carboxide and aluminum oxide, and an outer, from about 1 to about 15 ?m thick, aluminum oxide layer or (Al2O3+ZrO2)*N multilayer, a penultimate outermost layer of TiOx, where x ranges from about 1 to about 2, and an outermost, from about 0.3 to about 2 ?m thick, TiCxNyOz, layer, where x+y+z=1, x?0, y?0, and z?0, followed by a post-treatment removing at least said outermost layer on the edge-line and on the rake face.

Abstract: In a first aspect, the invention relates to a cutting tool that comprises a part (1) having an insert seat as well as a cutting insert (2) detachably connected in the same, which insert comprises a first serration connecting surface (3), which is formed of ridges spaced-apart by grooves, which ridges are arranged to engage grooves situated between ridges in a second serration connecting surface (4) serving as insert seat in said tool part (1). According to the invention, in one (3) of said serration connecting surfaces (3, 4), at least one enlarged ridge (18) is arranged between two spaced-apart fields (20a, 20b), which separately comprises a plurality of ordinary ridges of a certain size, which enlarged ridge is arranged to engage a correspondingly enlarged groove (19) in the second serration connecting surface (4). In additional aspects, the invention also relates to a cutting insert and a tool part as such.

Abstract: The present invention relates to a method of making an agglomerated powder mixture by wet milling a powder mixture containing hard constituent powder(s) based on carbides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and greater than about 15 wt-% binder phase powder(s) of Co and/or Ni as well as pressing agents and spray drying said slurry. By adding to said powder mixture before milling in addition from about 0.05 to about 0.50 wt-% of a complex forming and/or pH-decreasing/increasing additive such as triethanolamine, hydroxides or acids and a thickener in an amount of from about 0.01 to about 0.10 wt-% agglomerates with excellent flow properties are obtained.

Abstract: A method of depositing a crystalline ?-Al2O3 layer onto a cutting tool insert by Chemical Vapor Deposition at a temperature of from about 625 to about 800° C. includes the following steps: depositing a from about 0.1 to about 1.5 ?m layer of TiCxNyOz where x+y+z>=1 and z>0, preferably z>0.2; treating said layer at 625-1000° C. in a gas mixture containing from about 0.5 to about 3 vol-% O2, preferably as CO2+H2, or O2+H2, for a short period of time from about 0.5 to about 4 min, optionally in the presence of from about 0.5 to about 6 vol-% HCl; and depositing said Al2O3-layer by bringing said treated layer into contact with a gas mixture containing from about 2 to about 10 vol-% of AlC3, from about 16 to about 40 vol-% of CO2, in H2 and 0.8-2 vol-% of a sulphur-containing agent, preferably H2S, at a process pressure of from about 40 to about 300 mbar. Also included is a cutting tool insert with a coating including at least one ?-Al2O3-layer.

Abstract: A rotor for a vertical shaft impact crusher includes a vertical wall segment having a first wall portion which is tangential to the rotor and is located adjacent to the periphery of the rotor, and a second wall portion, which is angled in relation to the first wall portion and extends from the first wall portion into the rotor. The second wall portion includes a first section, which extends from the interior of the rotor towards its periphery and forms and obtuse first angle with the first wall portion, and a second section, which connects the first section and the first wall portion. The second section and the first wall portion form a second angle, which is smaller than the first angle, and at least one pocket for retaining material.

Abstract: A method for making a coated cutting tool insert by depositing by CVD, onto a cemented carbide, titanium based or ceramic substrate a hard layer system, having a total thickness of from about 2 to about 50 ?m, comprising at least one layer selected from titanium carbide, titanium nitride, titanium carbonitride, titanium carboxide and aluminum oxide, and an outer, from about 1 to about 15 ?m thick, aluminum oxide layer or (Al2O3+ZrO2)*N multilayer, a penultimate outermost layer of TiOx, where x ranges from about 1 to about 2, and an outermost, from about 0.3 to about 2 ?m thick, TiCxNyOz layer, where x+y+z=1, x?0, y?0, and z?0, followed by a post-treatment removing at least said outermost layer on the edge-line and on the rake face.

Abstract: A cemented carbide tool comprising hard constituents in a binder phase of Co and/or Ni and at least one surface portion and an interior portion in which surface portion the grain size is smaller than in the interior portion is disclosed. The surface portion with the fine grain size has a lower binder phase content than the interior portion. A method to form the cemented carbide cutting tool is also disclosed.

Abstract: A milling cutter for sharpening welding electrodes includes a tool body, and a plurality of cutting inserts fastened to the tool body. The inserts include a center cutting insert and at least two peripheral cutting inserts. Each peripheral cutting insert includes at least one cutting edge. The center cutting insert defines: two oppositely facing principle planes, two cutting edges disposed adjacent respective ones of the principle planes, and a concave surface extending between such cutting edges. The center cutting insert can cut (sharpen) the end surfaces of two welding electrodes simultaneously.

Abstract: A hydraulic rock breaking device, a protection valve and a method of operating a hydraulic rock breaking device. The rock breaking device comprises a percussion device to which pressure fluid is fed along an inlet channel. The inlet channel is provided with a protection valve arranged to monitor the volume flow of pressure fluid flowing through it. If the flow is larger than what has been preset, the protection valve closes, at least partly, the connection through it, protecting thus the percussion device against too high an input power. The protection valve comprises a throttle which generates a pressure difference the magnitude of which is dependent on the fed volume flow. Information on the pressure difference is utilized in controlling the protection valve.

Abstract: The present invention relates to a coated cutting tool insert with elongated shape with a rake face and an opposite bottom surface with improved strength properties obtained by providing the inserts with a blasted bottom surface. The inserts are preferably used for parting and grooving operations.

Abstract: A cutting tool including a basic body having a geometrical center axis, a loose top having a rear male element, and a drawbar having a front part in which a coupling means is included, which by engagement in a coupling means of the male element of the loose top can transfer axial forces. The coupling means form an interface between the loose top and the drawbar. Each coupling means includes two axially separated ridges, a front ridge in the male element is between a front groove and a rear groove, the front groove being shallower than the rear groove such that the bottom thereof is situated at a greater radial distance from the center axis than the bottom of the rear groove.

Abstract: A face milling insert comprising a pair of main cutting edges which are spaced apart from a center and meet at a corner where they transform into a surface wiping secondary edge, which is intersected by a bisector defining the corner between the main cutting edges, inside each main cutting edge a slope surface being formed, which slopes towards a countersunk bottom surface in a chip surface. A shoulder, having a top side situated at a higher level than the bottom surface, extends inwardly from the secondary edge, the slope surface of the main cutting edge that actively co-operates with the secondary edge, terminating at the shoulder.

Abstract: The present invention relates to a method of making tungsten carbide powder by dissolving at least one organic or inorganic metal salt or compound of at least one of the groups IV, V, and VI of the periodic system preferably Cr, V, Mo and W in at least one polar solvent. Powder of WO3 is added to the solution, the solvent is evaporated, the remaining powder is heat treated in reducing atmosphere, mixed with carbon and carburized.

Abstract: The invention relates to a cutting tool including a basic body and a cutting insert detachably connected to the basic body via an interface, which includes a pair of co-operating connecting surfaces in which engagement means are included, which may be in the form of knobs and seatings. A knob and a co-operating seating have a rotationally symmetrical, conical shape to prevent translation of the cutting insert in the plane of the interface. Another knob ensures that the cutting insert cannot be rotated in relation to the conical knob. Simultaneously, ample bearing surfaces abut against co-operating support surfaces in a connecting surface. In such a way, the cutting insert is fixed in a stable, non-overdetermined position in the basic body. Furthermore, the invention relates to a cutting insert as such.