Abstract: The present invention relates to an alloy for cutting tools comprising 75-97 % by weight of a hard carbonitride component and 3-25 % by weight of a binder metal, the hard component comprising titanium as the main metallic component besides tungsten, molybdenum, tantalum and optionally vanadium and as non metallic components carbon and nitrogen. The binder metal is selected from the group consisting of iron, cobalt and nickel.The plastic deformation resistance of the alloy has been improved by adding tantalum as a mixed carbide (Ti,Ta)C possibly also including Nb.

Abstract: A force sensor monitors the behavior of cutting tools during machining operations. The sensor is mounted on a machine tool of the type comprising a stable support portion and a carrier which includes a tool holder. The sensor is mounted between the stable support portion and the tool holder. The sensor includes a generally planar plate provided with a stable portion and flexible elements. The carrier is mounted to the flexible elements whereby forces from the tool holder are transmitted to the flexible elements for displaying same. Such displacement is detected by strain gauges mounted on deformable lands which interconnect the stable portion with the flexible elements.

Abstract: The present invention relates to a drill rod for percussion drilling machines comprising a rod or a sleeve-shaped element that is provided with a threaded portion for engagement with another correspondingly threaded drill rod element. In order to reduce the risk for pitting damage, the threaded portion is provided with a wear lining that is metallurgically bonded to the rod. The lining is made of a metallic material that is softer than the material of the element, the latter usually being steel.

Abstract: According to the invention there is now provided a protecting plate in compound design for use such as splinter screen, composite armour etc. Said plate comprises elements built of alternate lamellas of a hard material rich in hard constituents and a tough material with a superior metallugical bond between the lamellas. The hard material comprises particles such as carbides, nitrides, oxides and/or borides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and/or Al in a matrix based on Fe, Co and/or Ni where the amount of hard constituents is 30-70 vol-% and the tough material essentially comprises Fe, Co and/or Ni base alloys, preferably steel.

Abstract: The present invention relates to a ceramic cutting insert containing whiskers for chip forming machining of steel and having improved mechanical, thermal and wear properties. The insert comprises besides the oxide-based matrix 5-50% by volume, preferably 10-40% by volume, of homogeneously dispersed whiskers of carbides, nitrides and/or borides of titanium and/or zirconium and, where applicable, solid solutions thereof. A part of the whiskers may be replaced by whiskers of silicon carbide. The properties of the composite material can be further modified by coating the whisker material with thin layers. The whiskers reinforced cutting material shows an improved toughness behaviour and resistance to thermal crack formation without having a negative influence on the wear resistance to any appreciable extent.

Abstract: A threaded coupling for a high frequency percussion drill assembly comprises a rod and a sleeve having external and internal threads, respectively. The threads are of the asymmetrical type and make contact along opposing shoulder portions disposed on only one side of each crown portion. The threads have a maximum diameter from 30 to 40 mm, a pitch of 7 to 11 mm, and a height from 1.2 to 1.6 mm. The parts of the root and crown portions located immediate adjacent the contacting shoulder portions have radii from 3 to 5 mm.

Abstract: The present invention relates to a cylinder tube for scraped surface heat exchangers the interior surface (18) of which is even and the exterior surface of which is enlarged by providing a number of spaced grooves (16) with a smoothly rounded bottom portion, the profile depth (A) of which being substantially larger than the radius (R) at the bottom of said groove (16). The cylinder tube (10) shall be manufactured by a duplex stainless steel alloy consisting of the following constituents in weight-%; max 0.03% C, 18-30% Cr, 4-8% Ni, 0-6% Mo, 0.5-2% Mn, 0.5-2% Si, 0.05-0.30% N, the remainder Fe and normal impurities, whereby the amounts of the constituents are interrelated such that the amount of ferrite in the microstructure amounts to 35-65%.

Abstract: The present invention relates to an alloy for cutting tools comprising 75-97% by weight of a hard carbonitride component and 3-25% by weight of a binder metal, the hard component comprising titanium as the main metallic component besides tungsten, molybdenum, tantalum and optionally vanadium and as non metallic components carbon and nitrogen. The binder metal is selected from the group consisting of iron, cobalt and nickel.The plastic deformation resistance of the alloy has been improved by adding tantalum as a mixed carbide (Ti,Ta)C possibly also including Nb.

Abstract: The invention relates to methods for producing a metallic element such as a gasket (12) or a filter. The production methods relate to compacting of a stud (10) of coiled wire (11) having a rectangular cross-section into a compacted metallic element (12) and sintering of said element at an elevated temperature. The wires of the compact and sintered metallic element (12) are mutually interlocked.

Abstract: This invention relates to a cutting tool material with improved toughness behavior. The improved toughness behavior is obtained by using carefully selected reinforcing materials. The objectives of this invention are realized by simultaneously utilizing additives resulting in different toughening mechanisms. By the simultaneous utilization of different toughening additives, synergistic effects occur giving the tool excellent material properties. The tool material of the present invention comprises reinforcing whisker additives of one dimensional single crystals with preferably different diameter and aspect ratios, two dimensional single crystals with different thickness and aspect ratios, and, in combination therewith, phase transformation additives such as ZrO.sub.2.

Abstract: The invention relates to a turning insert. The insert (10) consists of longitudinally extending surfaces (13,14), end surfaces (15, 16), side surfaces (11), a shoulder (17) and a portion (18) provided with a cutting edge (19). The cutting edge (19) is circular and has a diameter which exceeds the thickness of the insert which makes a plurality of turning operations possible, including grooving into unlimited depth. The portion (18) is provided with rake face (25) sloping downwardly and inwardly from the cutting edge, which face is provided with a plurality of concave recesses (23) intersecting each other.

Abstract: A combined drilling and threading tool comprises a shank having a conical front portion defined by hole-cutting edges, and spirally curved ribs disposed rearwardly of the edges. A row of thread-cutting teeth is disposed along the leading edge of each rib. Each tooth includes a thread-cutting edge facing in the direction of tool rotation, and a side surface extending away from the direction of rotation. The side surface is shaped to produce axial and radial clearance relative to the thread being cut. Each tooth terminates at a location intermediate the leading and trailing edges of its associated rib.

Abstract: A saw holder includes a handle and a finger-like extension projecting forwardly from a front end of the handle. The handle includes a downwardly open recess for receiving a rear section of a sawblade. A bridge extends transversely across a front end of the recess for supporting the sawblade from beneath. A front portion of the extension includes a downwardly open groove for receiving a front section of the sawblade. A forwardly and downwardly inclined clamping screw is disposed in the handle for applying a downward force to the sawblade along a line of force disposed rearwardly of the point of contact between the sawblade and the bridge so that the force presses the sawblade downwardly against the bridge in a manner swinging the front section of the sawblade upwardly about that contact point and into contact with an upper surface of the groove.

Abstract: An exhaust gas purifier of the type wherein a catalytic body is elastically supported within a metal casing. This is achieved by at least partly filling a space between the catalytic body and the metal casing with a dampening member comprising one or more wire blocks. The wire is preformed of a screw shape and that preformed wire is wound into the shape of the block. This block is stretched to elastically fit over the body, and the block is compressed between the body and the casing.

Abstract: A drill provided with means for effecting a secondary cutting function, such as chamfering, counterboring and/or countersinking. The drill (10) comprises chip flutes, lands (14) and a cutting tip (11). Said means comprise a cylindrical tooth (12) provided with a cutting edge (13) and a pin (17). The land (14) is provided with two holes (15,18) which receive the tooth and the pin.

Abstract: A cutting tool for chipforming machining of work pieces is of the type comprising a rake face and a clearance face. A cutting edge is formed at the intersection of the rake and clearance faces. The cutting edge is intersected by a depression extending along the rake face. The depression intersects a projection formed at the clearance face.

Abstract: A tool or wear part comprises a cast iron or cast steel body carrying a plurality of cast-in inserts. Each insert comprises a cemented carbide cutting or wearing element partially embedded in the body, and an enclosure completely surrounding the embedded portion of the element. The enclosure is cast-in with respect to the body and has a higher melting point than the body. The enclosure is connected by a metallurgical bond to the body and by a shrink-fit to the element.

Abstract: A pipe joint for thin-walled tubes (13, 14) is provided for transmission of water. The pipe joint includes a male portion (11) and a female portion (12) both of which having pressure cut threads (18, 21). At mounting thereof these portions (11, 12) are threadably engaged so that a seal ring (25) received in an annular extension (23) of the female portion (12) is brought into engagement with a conical portion (16) of said male portion (11) so as to provide tightening of said pipe joint.

Abstract: A throttle actuating mechanism is employed in conjunction with a chain saw which has a trigger and is mounted for pivotal movement about a rotary axis from a rest position toward a workpiece. The mechanism includes a lever pivoted coaxially with the rotary axis of the chain saw and carrying an adjustable pin. The pin is engaged by the chain saw trigger when the chain saw is pivoted toward the workpiece, whereby the lever pivots in a first direction along with the lever. A spring yieldably opposes pivotal movement of the lever in the first direction, thereby causing the pin to actuate the trigger when the chain saw leaves its rest position. The lever engages a stop while pivoting in the opposite direction and before the chain saw reaches its rest position, whereby the trigger is deactivated when the chain saw is in its rest position.

Abstract: The present invention relates to a method and apparatus for positioning a tapered member so that the taper of a tapered surface thereof can be verified. The apparatus comprises a first surface having an angle with respect to the horizontal which is equal to the included angle of the shaft to be measured. A vertical surface having an angle equal to one half the included angle of the shaft to be measured is arranged along one edge of the first surface. A plurality of horizontal gauge block surfaces are arranged at predetermined vertical heights with respect to the base of the first angled surface. A gauge block, whose size is determined by the particular shaft to be measured, is secured to an appropriate gauge block surface so that a gauge can be preset to zero with reference to an upper horizontal gauge surface of the gauge block. Thereafter, the member to be measured is placed with the tapered surface resting against the two angled surfaces.